summaryrefslogtreecommitdiffhomepage
path: root/pkg/tcpip/stack
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/tcpip/stack')
-rw-r--r--pkg/tcpip/stack/BUILD160
-rw-r--r--pkg/tcpip/stack/fake_time_test.go209
-rw-r--r--pkg/tcpip/stack/forwarder_test.go849
-rw-r--r--pkg/tcpip/stack/linkaddrcache_test.go352
-rw-r--r--pkg/tcpip/stack/linkaddrentry_list.go193
-rw-r--r--pkg/tcpip/stack/ndp_test.go5419
-rw-r--r--pkg/tcpip/stack/neighbor_cache_test.go1726
-rw-r--r--pkg/tcpip/stack/neighbor_entry_list.go193
-rw-r--r--pkg/tcpip/stack/neighbor_entry_test.go2870
-rw-r--r--pkg/tcpip/stack/nic_test.go316
-rw-r--r--pkg/tcpip/stack/nud_test.go807
-rw-r--r--pkg/tcpip/stack/packet_buffer_list.go193
-rw-r--r--pkg/tcpip/stack/packet_buffer_test.go397
-rw-r--r--pkg/tcpip/stack/stack_state_autogen.go720
-rw-r--r--pkg/tcpip/stack/stack_test.go3501
-rw-r--r--pkg/tcpip/stack/transport_demuxer_test.go388
-rw-r--r--pkg/tcpip/stack/transport_test.go629
-rw-r--r--pkg/tcpip/stack/tuple_list.go193
18 files changed, 1492 insertions, 17623 deletions
diff --git a/pkg/tcpip/stack/BUILD b/pkg/tcpip/stack/BUILD
deleted file mode 100644
index 900938dd1..000000000
--- a/pkg/tcpip/stack/BUILD
+++ /dev/null
@@ -1,160 +0,0 @@
-load("//tools:defs.bzl", "go_library", "go_test")
-load("//tools/go_generics:defs.bzl", "go_template_instance")
-
-package(licenses = ["notice"])
-
-go_template_instance(
- name = "linkaddrentry_list",
- out = "linkaddrentry_list.go",
- package = "stack",
- prefix = "linkAddrEntry",
- template = "//pkg/ilist:generic_list",
- types = {
- "Element": "*linkAddrEntry",
- "Linker": "*linkAddrEntry",
- },
-)
-
-go_template_instance(
- name = "neighbor_entry_list",
- out = "neighbor_entry_list.go",
- package = "stack",
- prefix = "neighborEntry",
- template = "//pkg/ilist:generic_list",
- types = {
- "Element": "*neighborEntry",
- "Linker": "*neighborEntry",
- },
-)
-
-go_template_instance(
- name = "packet_buffer_list",
- out = "packet_buffer_list.go",
- package = "stack",
- prefix = "PacketBuffer",
- template = "//pkg/ilist:generic_list",
- types = {
- "Element": "*PacketBuffer",
- "Linker": "*PacketBuffer",
- },
-)
-
-go_template_instance(
- name = "tuple_list",
- out = "tuple_list.go",
- package = "stack",
- prefix = "tuple",
- template = "//pkg/ilist:generic_list",
- types = {
- "Element": "*tuple",
- "Linker": "*tuple",
- },
-)
-
-go_library(
- name = "stack",
- srcs = [
- "conntrack.go",
- "dhcpv6configurationfromndpra_string.go",
- "forwarder.go",
- "headertype_string.go",
- "icmp_rate_limit.go",
- "iptables.go",
- "iptables_state.go",
- "iptables_targets.go",
- "iptables_types.go",
- "linkaddrcache.go",
- "linkaddrentry_list.go",
- "ndp.go",
- "neighbor_cache.go",
- "neighbor_entry.go",
- "neighbor_entry_list.go",
- "neighborstate_string.go",
- "nic.go",
- "nud.go",
- "packet_buffer.go",
- "packet_buffer_list.go",
- "rand.go",
- "registration.go",
- "route.go",
- "stack.go",
- "stack_global_state.go",
- "stack_options.go",
- "transport_demuxer.go",
- "tuple_list.go",
- ],
- visibility = ["//visibility:public"],
- deps = [
- "//pkg/ilist",
- "//pkg/log",
- "//pkg/rand",
- "//pkg/sleep",
- "//pkg/sync",
- "//pkg/tcpip",
- "//pkg/tcpip/buffer",
- "//pkg/tcpip/hash/jenkins",
- "//pkg/tcpip/header",
- "//pkg/tcpip/ports",
- "//pkg/tcpip/seqnum",
- "//pkg/tcpip/transport/tcpconntrack",
- "//pkg/waiter",
- "@org_golang_x_time//rate:go_default_library",
- ],
-)
-
-go_test(
- name = "stack_x_test",
- size = "medium",
- srcs = [
- "ndp_test.go",
- "nud_test.go",
- "stack_test.go",
- "transport_demuxer_test.go",
- "transport_test.go",
- ],
- shard_count = 20,
- deps = [
- ":stack",
- "//pkg/rand",
- "//pkg/tcpip",
- "//pkg/tcpip/buffer",
- "//pkg/tcpip/checker",
- "//pkg/tcpip/header",
- "//pkg/tcpip/link/channel",
- "//pkg/tcpip/link/loopback",
- "//pkg/tcpip/network/arp",
- "//pkg/tcpip/network/ipv4",
- "//pkg/tcpip/network/ipv6",
- "//pkg/tcpip/ports",
- "//pkg/tcpip/transport/icmp",
- "//pkg/tcpip/transport/udp",
- "//pkg/waiter",
- "@com_github_google_go_cmp//cmp:go_default_library",
- "@com_github_google_go_cmp//cmp/cmpopts:go_default_library",
- ],
-)
-
-go_test(
- name = "stack_test",
- size = "small",
- srcs = [
- "fake_time_test.go",
- "forwarder_test.go",
- "linkaddrcache_test.go",
- "neighbor_cache_test.go",
- "neighbor_entry_test.go",
- "nic_test.go",
- "packet_buffer_test.go",
- ],
- library = ":stack",
- deps = [
- "//pkg/sleep",
- "//pkg/sync",
- "//pkg/tcpip",
- "//pkg/tcpip/buffer",
- "//pkg/tcpip/header",
- "@com_github_dpjacques_clockwork//:go_default_library",
- "@com_github_google_go_cmp//cmp:go_default_library",
- "@com_github_google_go_cmp//cmp/cmpopts:go_default_library",
- ],
-)
diff --git a/pkg/tcpip/stack/fake_time_test.go b/pkg/tcpip/stack/fake_time_test.go
deleted file mode 100644
index 92c8cb534..000000000
--- a/pkg/tcpip/stack/fake_time_test.go
+++ /dev/null
@@ -1,209 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack
-
-import (
- "container/heap"
- "sync"
- "time"
-
- "github.com/dpjacques/clockwork"
- "gvisor.dev/gvisor/pkg/tcpip"
-)
-
-type fakeClock struct {
- clock clockwork.FakeClock
-
- // mu protects the fields below.
- mu sync.RWMutex
-
- // times is min-heap of times. A heap is used for quick retrieval of the next
- // upcoming time of scheduled work.
- times *timeHeap
-
- // waitGroups stores one WaitGroup for all work scheduled to execute at the
- // same time via AfterFunc. This allows parallel execution of all functions
- // passed to AfterFunc scheduled for the same time.
- waitGroups map[time.Time]*sync.WaitGroup
-}
-
-func newFakeClock() *fakeClock {
- return &fakeClock{
- clock: clockwork.NewFakeClock(),
- times: &timeHeap{},
- waitGroups: make(map[time.Time]*sync.WaitGroup),
- }
-}
-
-var _ tcpip.Clock = (*fakeClock)(nil)
-
-// NowNanoseconds implements tcpip.Clock.NowNanoseconds.
-func (fc *fakeClock) NowNanoseconds() int64 {
- return fc.clock.Now().UnixNano()
-}
-
-// NowMonotonic implements tcpip.Clock.NowMonotonic.
-func (fc *fakeClock) NowMonotonic() int64 {
- return fc.NowNanoseconds()
-}
-
-// AfterFunc implements tcpip.Clock.AfterFunc.
-func (fc *fakeClock) AfterFunc(d time.Duration, f func()) tcpip.Timer {
- until := fc.clock.Now().Add(d)
- wg := fc.addWait(until)
- return &fakeTimer{
- clock: fc,
- until: until,
- timer: fc.clock.AfterFunc(d, func() {
- defer wg.Done()
- f()
- }),
- }
-}
-
-// addWait adds an additional wait to the WaitGroup for parallel execution of
-// all work scheduled for t. Returns a reference to the WaitGroup modified.
-func (fc *fakeClock) addWait(t time.Time) *sync.WaitGroup {
- fc.mu.RLock()
- wg, ok := fc.waitGroups[t]
- fc.mu.RUnlock()
-
- if ok {
- wg.Add(1)
- return wg
- }
-
- fc.mu.Lock()
- heap.Push(fc.times, t)
- fc.mu.Unlock()
-
- wg = &sync.WaitGroup{}
- wg.Add(1)
-
- fc.mu.Lock()
- fc.waitGroups[t] = wg
- fc.mu.Unlock()
-
- return wg
-}
-
-// removeWait removes a wait from the WaitGroup for parallel execution of all
-// work scheduled for t.
-func (fc *fakeClock) removeWait(t time.Time) {
- fc.mu.RLock()
- defer fc.mu.RUnlock()
-
- wg := fc.waitGroups[t]
- wg.Done()
-}
-
-// advance executes all work that have been scheduled to execute within d from
-// the current fake time. Blocks until all work has completed execution.
-func (fc *fakeClock) advance(d time.Duration) {
- // Block until all the work is done
- until := fc.clock.Now().Add(d)
- for {
- fc.mu.Lock()
- if fc.times.Len() == 0 {
- fc.mu.Unlock()
- return
- }
-
- t := heap.Pop(fc.times).(time.Time)
- if t.After(until) {
- // No work to do
- heap.Push(fc.times, t)
- fc.mu.Unlock()
- return
- }
- fc.mu.Unlock()
-
- diff := t.Sub(fc.clock.Now())
- fc.clock.Advance(diff)
-
- fc.mu.RLock()
- wg := fc.waitGroups[t]
- fc.mu.RUnlock()
-
- wg.Wait()
-
- fc.mu.Lock()
- delete(fc.waitGroups, t)
- fc.mu.Unlock()
- }
-}
-
-type fakeTimer struct {
- clock *fakeClock
- timer clockwork.Timer
-
- mu sync.RWMutex
- until time.Time
-}
-
-var _ tcpip.Timer = (*fakeTimer)(nil)
-
-// Reset implements tcpip.Timer.Reset.
-func (ft *fakeTimer) Reset(d time.Duration) {
- if !ft.timer.Reset(d) {
- return
- }
-
- ft.mu.Lock()
- defer ft.mu.Unlock()
-
- ft.clock.removeWait(ft.until)
- ft.until = ft.clock.clock.Now().Add(d)
- ft.clock.addWait(ft.until)
-}
-
-// Stop implements tcpip.Timer.Stop.
-func (ft *fakeTimer) Stop() bool {
- if !ft.timer.Stop() {
- return false
- }
-
- ft.mu.RLock()
- defer ft.mu.RUnlock()
-
- ft.clock.removeWait(ft.until)
- return true
-}
-
-type timeHeap []time.Time
-
-var _ heap.Interface = (*timeHeap)(nil)
-
-func (h timeHeap) Len() int {
- return len(h)
-}
-
-func (h timeHeap) Less(i, j int) bool {
- return h[i].Before(h[j])
-}
-
-func (h timeHeap) Swap(i, j int) {
- h[i], h[j] = h[j], h[i]
-}
-
-func (h *timeHeap) Push(x interface{}) {
- *h = append(*h, x.(time.Time))
-}
-
-func (h *timeHeap) Pop() interface{} {
- last := (*h)[len(*h)-1]
- *h = (*h)[:len(*h)-1]
- return last
-}
diff --git a/pkg/tcpip/stack/forwarder_test.go b/pkg/tcpip/stack/forwarder_test.go
deleted file mode 100644
index 54759091a..000000000
--- a/pkg/tcpip/stack/forwarder_test.go
+++ /dev/null
@@ -1,849 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack
-
-import (
- "encoding/binary"
- "math"
- "testing"
- "time"
-
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
- "gvisor.dev/gvisor/pkg/tcpip/header"
-)
-
-const (
- fwdTestNetNumber tcpip.NetworkProtocolNumber = math.MaxUint32
- fwdTestNetHeaderLen = 12
- fwdTestNetDefaultPrefixLen = 8
-
- // fwdTestNetDefaultMTU is the MTU, in bytes, used throughout the tests,
- // except where another value is explicitly used. It is chosen to match
- // the MTU of loopback interfaces on linux systems.
- fwdTestNetDefaultMTU = 65536
-
- dstAddrOffset = 0
- srcAddrOffset = 1
- protocolNumberOffset = 2
-)
-
-// fwdTestNetworkEndpoint is a network-layer protocol endpoint.
-// Headers of this protocol are fwdTestNetHeaderLen bytes, but we currently only
-// use the first three: destination address, source address, and transport
-// protocol. They're all one byte fields to simplify parsing.
-type fwdTestNetworkEndpoint struct {
- nicID tcpip.NICID
- proto *fwdTestNetworkProtocol
- dispatcher TransportDispatcher
- ep LinkEndpoint
-}
-
-var _ NetworkEndpoint = (*fwdTestNetworkEndpoint)(nil)
-
-func (f *fwdTestNetworkEndpoint) MTU() uint32 {
- return f.ep.MTU() - uint32(f.MaxHeaderLength())
-}
-
-func (f *fwdTestNetworkEndpoint) NICID() tcpip.NICID {
- return f.nicID
-}
-
-func (*fwdTestNetworkEndpoint) DefaultTTL() uint8 {
- return 123
-}
-
-func (f *fwdTestNetworkEndpoint) HandlePacket(r *Route, pkt *PacketBuffer) {
- // Dispatch the packet to the transport protocol.
- f.dispatcher.DeliverTransportPacket(r, tcpip.TransportProtocolNumber(pkt.NetworkHeader().View()[protocolNumberOffset]), pkt)
-}
-
-func (f *fwdTestNetworkEndpoint) MaxHeaderLength() uint16 {
- return f.ep.MaxHeaderLength() + fwdTestNetHeaderLen
-}
-
-func (f *fwdTestNetworkEndpoint) PseudoHeaderChecksum(protocol tcpip.TransportProtocolNumber, dstAddr tcpip.Address) uint16 {
- return 0
-}
-
-func (f *fwdTestNetworkEndpoint) Capabilities() LinkEndpointCapabilities {
- return f.ep.Capabilities()
-}
-
-func (f *fwdTestNetworkEndpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber {
- return f.proto.Number()
-}
-
-func (f *fwdTestNetworkEndpoint) WritePacket(r *Route, gso *GSO, params NetworkHeaderParams, pkt *PacketBuffer) *tcpip.Error {
- // Add the protocol's header to the packet and send it to the link
- // endpoint.
- b := pkt.NetworkHeader().Push(fwdTestNetHeaderLen)
- b[dstAddrOffset] = r.RemoteAddress[0]
- b[srcAddrOffset] = r.LocalAddress[0]
- b[protocolNumberOffset] = byte(params.Protocol)
-
- return f.ep.WritePacket(r, gso, fwdTestNetNumber, pkt)
-}
-
-// WritePackets implements LinkEndpoint.WritePackets.
-func (f *fwdTestNetworkEndpoint) WritePackets(r *Route, gso *GSO, pkts PacketBufferList, params NetworkHeaderParams) (int, *tcpip.Error) {
- panic("not implemented")
-}
-
-func (*fwdTestNetworkEndpoint) WriteHeaderIncludedPacket(r *Route, pkt *PacketBuffer) *tcpip.Error {
- return tcpip.ErrNotSupported
-}
-
-func (*fwdTestNetworkEndpoint) Close() {}
-
-// fwdTestNetworkProtocol is a network-layer protocol that implements Address
-// resolution.
-type fwdTestNetworkProtocol struct {
- addrCache *linkAddrCache
- neigh *neighborCache
- addrResolveDelay time.Duration
- onLinkAddressResolved func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, _ tcpip.LinkAddress)
- onResolveStaticAddress func(tcpip.Address) (tcpip.LinkAddress, bool)
-}
-
-var _ NetworkProtocol = (*fwdTestNetworkProtocol)(nil)
-var _ LinkAddressResolver = (*fwdTestNetworkProtocol)(nil)
-
-func (f *fwdTestNetworkProtocol) Number() tcpip.NetworkProtocolNumber {
- return fwdTestNetNumber
-}
-
-func (f *fwdTestNetworkProtocol) MinimumPacketSize() int {
- return fwdTestNetHeaderLen
-}
-
-func (f *fwdTestNetworkProtocol) DefaultPrefixLen() int {
- return fwdTestNetDefaultPrefixLen
-}
-
-func (*fwdTestNetworkProtocol) ParseAddresses(v buffer.View) (src, dst tcpip.Address) {
- return tcpip.Address(v[srcAddrOffset : srcAddrOffset+1]), tcpip.Address(v[dstAddrOffset : dstAddrOffset+1])
-}
-
-func (*fwdTestNetworkProtocol) Parse(pkt *PacketBuffer) (tcpip.TransportProtocolNumber, bool, bool) {
- netHeader, ok := pkt.NetworkHeader().Consume(fwdTestNetHeaderLen)
- if !ok {
- return 0, false, false
- }
- return tcpip.TransportProtocolNumber(netHeader[protocolNumberOffset]), true, true
-}
-
-func (f *fwdTestNetworkProtocol) NewEndpoint(nicID tcpip.NICID, _ LinkAddressCache, _ NUDHandler, dispatcher TransportDispatcher, ep LinkEndpoint, _ *Stack) NetworkEndpoint {
- return &fwdTestNetworkEndpoint{
- nicID: nicID,
- proto: f,
- dispatcher: dispatcher,
- ep: ep,
- }
-}
-
-func (*fwdTestNetworkProtocol) SetOption(tcpip.SettableNetworkProtocolOption) *tcpip.Error {
- return tcpip.ErrUnknownProtocolOption
-}
-
-func (*fwdTestNetworkProtocol) Option(tcpip.GettableNetworkProtocolOption) *tcpip.Error {
- return tcpip.ErrUnknownProtocolOption
-}
-
-func (*fwdTestNetworkProtocol) Close() {}
-
-func (*fwdTestNetworkProtocol) Wait() {}
-
-func (f *fwdTestNetworkProtocol) LinkAddressRequest(addr, localAddr tcpip.Address, remoteLinkAddr tcpip.LinkAddress, linkEP LinkEndpoint) *tcpip.Error {
- if f.onLinkAddressResolved != nil {
- time.AfterFunc(f.addrResolveDelay, func() {
- f.onLinkAddressResolved(f.addrCache, f.neigh, addr, remoteLinkAddr)
- })
- }
- return nil
-}
-
-func (f *fwdTestNetworkProtocol) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bool) {
- if f.onResolveStaticAddress != nil {
- return f.onResolveStaticAddress(addr)
- }
- return "", false
-}
-
-func (*fwdTestNetworkProtocol) LinkAddressProtocol() tcpip.NetworkProtocolNumber {
- return fwdTestNetNumber
-}
-
-// fwdTestPacketInfo holds all the information about an outbound packet.
-type fwdTestPacketInfo struct {
- RemoteLinkAddress tcpip.LinkAddress
- LocalLinkAddress tcpip.LinkAddress
- Pkt *PacketBuffer
-}
-
-type fwdTestLinkEndpoint struct {
- dispatcher NetworkDispatcher
- mtu uint32
- linkAddr tcpip.LinkAddress
-
- // C is where outbound packets are queued.
- C chan fwdTestPacketInfo
-}
-
-// InjectInbound injects an inbound packet.
-func (e *fwdTestLinkEndpoint) InjectInbound(protocol tcpip.NetworkProtocolNumber, pkt *PacketBuffer) {
- e.InjectLinkAddr(protocol, "", pkt)
-}
-
-// InjectLinkAddr injects an inbound packet with a remote link address.
-func (e *fwdTestLinkEndpoint) InjectLinkAddr(protocol tcpip.NetworkProtocolNumber, remote tcpip.LinkAddress, pkt *PacketBuffer) {
- e.dispatcher.DeliverNetworkPacket(remote, "" /* local */, protocol, pkt)
-}
-
-// Attach saves the stack network-layer dispatcher for use later when packets
-// are injected.
-func (e *fwdTestLinkEndpoint) Attach(dispatcher NetworkDispatcher) {
- e.dispatcher = dispatcher
-}
-
-// IsAttached implements stack.LinkEndpoint.IsAttached.
-func (e *fwdTestLinkEndpoint) IsAttached() bool {
- return e.dispatcher != nil
-}
-
-// MTU implements stack.LinkEndpoint.MTU. It returns the value initialized
-// during construction.
-func (e *fwdTestLinkEndpoint) MTU() uint32 {
- return e.mtu
-}
-
-// Capabilities implements stack.LinkEndpoint.Capabilities.
-func (e fwdTestLinkEndpoint) Capabilities() LinkEndpointCapabilities {
- caps := LinkEndpointCapabilities(0)
- return caps | CapabilityResolutionRequired
-}
-
-// GSOMaxSize returns the maximum GSO packet size.
-func (*fwdTestLinkEndpoint) GSOMaxSize() uint32 {
- return 1 << 15
-}
-
-// MaxHeaderLength returns the maximum size of the link layer header. Given it
-// doesn't have a header, it just returns 0.
-func (*fwdTestLinkEndpoint) MaxHeaderLength() uint16 {
- return 0
-}
-
-// LinkAddress returns the link address of this endpoint.
-func (e *fwdTestLinkEndpoint) LinkAddress() tcpip.LinkAddress {
- return e.linkAddr
-}
-
-func (e fwdTestLinkEndpoint) WritePacket(r *Route, gso *GSO, protocol tcpip.NetworkProtocolNumber, pkt *PacketBuffer) *tcpip.Error {
- p := fwdTestPacketInfo{
- RemoteLinkAddress: r.RemoteLinkAddress,
- LocalLinkAddress: r.LocalLinkAddress,
- Pkt: pkt,
- }
-
- select {
- case e.C <- p:
- default:
- }
-
- return nil
-}
-
-// WritePackets stores outbound packets into the channel.
-func (e *fwdTestLinkEndpoint) WritePackets(r *Route, gso *GSO, pkts PacketBufferList, protocol tcpip.NetworkProtocolNumber) (int, *tcpip.Error) {
- n := 0
- for pkt := pkts.Front(); pkt != nil; pkt = pkt.Next() {
- e.WritePacket(r, gso, protocol, pkt)
- n++
- }
-
- return n, nil
-}
-
-// WriteRawPacket implements stack.LinkEndpoint.WriteRawPacket.
-func (e *fwdTestLinkEndpoint) WriteRawPacket(vv buffer.VectorisedView) *tcpip.Error {
- p := fwdTestPacketInfo{
- Pkt: NewPacketBuffer(PacketBufferOptions{Data: vv}),
- }
-
- select {
- case e.C <- p:
- default:
- }
-
- return nil
-}
-
-// Wait implements stack.LinkEndpoint.Wait.
-func (*fwdTestLinkEndpoint) Wait() {}
-
-// ARPHardwareType implements stack.LinkEndpoint.ARPHardwareType.
-func (*fwdTestLinkEndpoint) ARPHardwareType() header.ARPHardwareType {
- panic("not implemented")
-}
-
-// AddHeader implements stack.LinkEndpoint.AddHeader.
-func (e *fwdTestLinkEndpoint) AddHeader(local, remote tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *PacketBuffer) {
- panic("not implemented")
-}
-
-func fwdTestNetFactory(t *testing.T, proto *fwdTestNetworkProtocol, useNeighborCache bool) (ep1, ep2 *fwdTestLinkEndpoint) {
- // Create a stack with the network protocol and two NICs.
- s := New(Options{
- NetworkProtocols: []NetworkProtocol{proto},
- UseNeighborCache: useNeighborCache,
- })
-
- if !useNeighborCache {
- proto.addrCache = s.linkAddrCache
- }
-
- // Enable forwarding.
- s.SetForwarding(true)
-
- // NIC 1 has the link address "a", and added the network address 1.
- ep1 = &fwdTestLinkEndpoint{
- C: make(chan fwdTestPacketInfo, 300),
- mtu: fwdTestNetDefaultMTU,
- linkAddr: "a",
- }
- if err := s.CreateNIC(1, ep1); err != nil {
- t.Fatal("CreateNIC #1 failed:", err)
- }
- if err := s.AddAddress(1, fwdTestNetNumber, "\x01"); err != nil {
- t.Fatal("AddAddress #1 failed:", err)
- }
-
- // NIC 2 has the link address "b", and added the network address 2.
- ep2 = &fwdTestLinkEndpoint{
- C: make(chan fwdTestPacketInfo, 300),
- mtu: fwdTestNetDefaultMTU,
- linkAddr: "b",
- }
- if err := s.CreateNIC(2, ep2); err != nil {
- t.Fatal("CreateNIC #2 failed:", err)
- }
- if err := s.AddAddress(2, fwdTestNetNumber, "\x02"); err != nil {
- t.Fatal("AddAddress #2 failed:", err)
- }
-
- if useNeighborCache {
- // Control the neighbor cache for NIC 2.
- nic, ok := s.nics[2]
- if !ok {
- t.Fatal("failed to get the neighbor cache for NIC 2")
- }
- proto.neigh = nic.neigh
- }
-
- // Route all packets to NIC 2.
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, NIC: 2}})
- }
-
- return ep1, ep2
-}
-
-func TestForwardingWithStaticResolver(t *testing.T) {
- tests := []struct {
- name string
- useNeighborCache bool
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- // Create a network protocol with a static resolver.
- proto := &fwdTestNetworkProtocol{
- onResolveStaticAddress:
- // The network address 3 is resolved to the link address "c".
- func(addr tcpip.Address) (tcpip.LinkAddress, bool) {
- if addr == "\x03" {
- return "c", true
- }
- return "", false
- },
- }
-
- ep1, ep2 := fwdTestNetFactory(t, proto, test.useNeighborCache)
-
- // Inject an inbound packet to address 3 on NIC 1, and see if it is
- // forwarded to NIC 2.
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = 3
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
-
- var p fwdTestPacketInfo
-
- select {
- case p = <-ep2.C:
- default:
- t.Fatal("packet not forwarded")
- }
-
- // Test that the static address resolution happened correctly.
- if p.RemoteLinkAddress != "c" {
- t.Fatalf("got p.RemoteLinkAddress = %s, want = c", p.RemoteLinkAddress)
- }
- if p.LocalLinkAddress != "b" {
- t.Fatalf("got p.LocalLinkAddress = %s, want = b", p.LocalLinkAddress)
- }
- })
- }
-}
-
-func TestForwardingWithFakeResolver(t *testing.T) {
- tests := []struct {
- name string
- useNeighborCache bool
- proto *fwdTestNetworkProtocol
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, _ tcpip.LinkAddress) {
- // Any address will be resolved to the link address "c".
- cache.add(tcpip.FullAddress{NIC: 2, Addr: addr}, "c")
- },
- },
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, remoteLinkAddr tcpip.LinkAddress) {
- t.Helper()
- if len(remoteLinkAddr) != 0 {
- t.Fatalf("got remoteLinkAddr=%q, want unspecified", remoteLinkAddr)
- }
- // Any address will be resolved to the link address "c".
- neigh.HandleConfirmation(addr, "c", ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- },
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ep1, ep2 := fwdTestNetFactory(t, test.proto, test.useNeighborCache)
-
- // Inject an inbound packet to address 3 on NIC 1, and see if it is
- // forwarded to NIC 2.
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = 3
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
-
- var p fwdTestPacketInfo
-
- select {
- case p = <-ep2.C:
- case <-time.After(time.Second):
- t.Fatal("packet not forwarded")
- }
-
- // Test that the address resolution happened correctly.
- if p.RemoteLinkAddress != "c" {
- t.Fatalf("got p.RemoteLinkAddress = %s, want = c", p.RemoteLinkAddress)
- }
- if p.LocalLinkAddress != "b" {
- t.Fatalf("got p.LocalLinkAddress = %s, want = b", p.LocalLinkAddress)
- }
- })
- }
-}
-
-func TestForwardingWithNoResolver(t *testing.T) {
- // Create a network protocol without a resolver.
- proto := &fwdTestNetworkProtocol{}
-
- // Whether or not we use the neighbor cache here does not matter since
- // neither linkAddrCache nor neighborCache will be used.
- ep1, ep2 := fwdTestNetFactory(t, proto, false /* useNeighborCache */)
-
- // inject an inbound packet to address 3 on NIC 1, and see if it is
- // forwarded to NIC 2.
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = 3
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
-
- select {
- case <-ep2.C:
- t.Fatal("Packet should not be forwarded")
- case <-time.After(time.Second):
- }
-}
-
-func TestForwardingWithFakeResolverPartialTimeout(t *testing.T) {
- tests := []struct {
- name string
- useNeighborCache bool
- proto *fwdTestNetworkProtocol
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, _ tcpip.LinkAddress) {
- // Only packets to address 3 will be resolved to the
- // link address "c".
- if addr == "\x03" {
- cache.add(tcpip.FullAddress{NIC: 2, Addr: addr}, "c")
- }
- },
- },
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, remoteLinkAddr tcpip.LinkAddress) {
- t.Helper()
- if len(remoteLinkAddr) != 0 {
- t.Fatalf("got remoteLinkAddr=%q, want unspecified", remoteLinkAddr)
- }
- // Only packets to address 3 will be resolved to the
- // link address "c".
- if addr == "\x03" {
- neigh.HandleConfirmation(addr, "c", ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- }
- },
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ep1, ep2 := fwdTestNetFactory(t, test.proto, test.useNeighborCache)
-
- // Inject an inbound packet to address 4 on NIC 1. This packet should
- // not be forwarded.
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = 4
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
-
- // Inject an inbound packet to address 3 on NIC 1, and see if it is
- // forwarded to NIC 2.
- buf = buffer.NewView(30)
- buf[dstAddrOffset] = 3
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
-
- var p fwdTestPacketInfo
-
- select {
- case p = <-ep2.C:
- case <-time.After(time.Second):
- t.Fatal("packet not forwarded")
- }
-
- if nh := PayloadSince(p.Pkt.NetworkHeader()); nh[dstAddrOffset] != 3 {
- t.Fatalf("got p.Pkt.NetworkHeader[dstAddrOffset] = %d, want = 3", nh[dstAddrOffset])
- }
-
- // Test that the address resolution happened correctly.
- if p.RemoteLinkAddress != "c" {
- t.Fatalf("got p.RemoteLinkAddress = %s, want = c", p.RemoteLinkAddress)
- }
- if p.LocalLinkAddress != "b" {
- t.Fatalf("got p.LocalLinkAddress = %s, want = b", p.LocalLinkAddress)
- }
- })
- }
-}
-
-func TestForwardingWithFakeResolverTwoPackets(t *testing.T) {
- tests := []struct {
- name string
- useNeighborCache bool
- proto *fwdTestNetworkProtocol
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, _ tcpip.LinkAddress) {
- // Any packets will be resolved to the link address "c".
- cache.add(tcpip.FullAddress{NIC: 2, Addr: addr}, "c")
- },
- },
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, remoteLinkAddr tcpip.LinkAddress) {
- t.Helper()
- if len(remoteLinkAddr) != 0 {
- t.Fatalf("got remoteLinkAddr=%q, want unspecified", remoteLinkAddr)
- }
- // Any packets will be resolved to the link address "c".
- neigh.HandleConfirmation(addr, "c", ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- },
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ep1, ep2 := fwdTestNetFactory(t, test.proto, test.useNeighborCache)
-
- // Inject two inbound packets to address 3 on NIC 1.
- for i := 0; i < 2; i++ {
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = 3
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- }
-
- for i := 0; i < 2; i++ {
- var p fwdTestPacketInfo
-
- select {
- case p = <-ep2.C:
- case <-time.After(time.Second):
- t.Fatal("packet not forwarded")
- }
-
- if nh := PayloadSince(p.Pkt.NetworkHeader()); nh[dstAddrOffset] != 3 {
- t.Fatalf("got p.Pkt.NetworkHeader[dstAddrOffset] = %d, want = 3", nh[dstAddrOffset])
- }
-
- // Test that the address resolution happened correctly.
- if p.RemoteLinkAddress != "c" {
- t.Fatalf("got p.RemoteLinkAddress = %s, want = c", p.RemoteLinkAddress)
- }
- if p.LocalLinkAddress != "b" {
- t.Fatalf("got p.LocalLinkAddress = %s, want = b", p.LocalLinkAddress)
- }
- }
- })
- }
-}
-
-func TestForwardingWithFakeResolverManyPackets(t *testing.T) {
- tests := []struct {
- name string
- useNeighborCache bool
- proto *fwdTestNetworkProtocol
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, _ tcpip.LinkAddress) {
- // Any packets will be resolved to the link address "c".
- cache.add(tcpip.FullAddress{NIC: 2, Addr: addr}, "c")
- },
- },
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, remoteLinkAddr tcpip.LinkAddress) {
- t.Helper()
- if len(remoteLinkAddr) != 0 {
- t.Fatalf("got remoteLinkAddr=%q, want unspecified", remoteLinkAddr)
- }
- // Any packets will be resolved to the link address "c".
- neigh.HandleConfirmation(addr, "c", ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- },
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ep1, ep2 := fwdTestNetFactory(t, test.proto, test.useNeighborCache)
-
- for i := 0; i < maxPendingPacketsPerResolution+5; i++ {
- // Inject inbound 'maxPendingPacketsPerResolution + 5' packets on NIC 1.
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = 3
- // Set the packet sequence number.
- binary.BigEndian.PutUint16(buf[fwdTestNetHeaderLen:], uint16(i))
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- }
-
- for i := 0; i < maxPendingPacketsPerResolution; i++ {
- var p fwdTestPacketInfo
-
- select {
- case p = <-ep2.C:
- case <-time.After(time.Second):
- t.Fatal("packet not forwarded")
- }
-
- b := PayloadSince(p.Pkt.NetworkHeader())
- if b[dstAddrOffset] != 3 {
- t.Fatalf("got b[dstAddrOffset] = %d, want = 3", b[dstAddrOffset])
- }
- if len(b) < fwdTestNetHeaderLen+2 {
- t.Fatalf("packet is too short to hold a sequence number: len(b) = %d", b)
- }
- seqNumBuf := b[fwdTestNetHeaderLen:]
-
- // The first 5 packets should not be forwarded so the sequence number should
- // start with 5.
- want := uint16(i + 5)
- if n := binary.BigEndian.Uint16(seqNumBuf); n != want {
- t.Fatalf("got the packet #%d, want = #%d", n, want)
- }
-
- // Test that the address resolution happened correctly.
- if p.RemoteLinkAddress != "c" {
- t.Fatalf("got p.RemoteLinkAddress = %s, want = c", p.RemoteLinkAddress)
- }
- if p.LocalLinkAddress != "b" {
- t.Fatalf("got p.LocalLinkAddress = %s, want = b", p.LocalLinkAddress)
- }
- }
- })
- }
-}
-
-func TestForwardingWithFakeResolverManyResolutions(t *testing.T) {
- tests := []struct {
- name string
- useNeighborCache bool
- proto *fwdTestNetworkProtocol
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, _ tcpip.LinkAddress) {
- // Any packets will be resolved to the link address "c".
- cache.add(tcpip.FullAddress{NIC: 2, Addr: addr}, "c")
- },
- },
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- proto: &fwdTestNetworkProtocol{
- addrResolveDelay: 500 * time.Millisecond,
- onLinkAddressResolved: func(cache *linkAddrCache, neigh *neighborCache, addr tcpip.Address, remoteLinkAddr tcpip.LinkAddress) {
- t.Helper()
- if len(remoteLinkAddr) != 0 {
- t.Fatalf("got remoteLinkAddr=%q, want unspecified", remoteLinkAddr)
- }
- // Any packets will be resolved to the link address "c".
- neigh.HandleConfirmation(addr, "c", ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- },
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ep1, ep2 := fwdTestNetFactory(t, test.proto, test.useNeighborCache)
-
- for i := 0; i < maxPendingResolutions+5; i++ {
- // Inject inbound 'maxPendingResolutions + 5' packets on NIC 1.
- // Each packet has a different destination address (3 to
- // maxPendingResolutions + 7).
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = byte(3 + i)
- ep1.InjectInbound(fwdTestNetNumber, NewPacketBuffer(PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- }
-
- for i := 0; i < maxPendingResolutions; i++ {
- var p fwdTestPacketInfo
-
- select {
- case p = <-ep2.C:
- case <-time.After(time.Second):
- t.Fatal("packet not forwarded")
- }
-
- // The first 5 packets (address 3 to 7) should not be forwarded
- // because their address resolutions are interrupted.
- if nh := PayloadSince(p.Pkt.NetworkHeader()); nh[dstAddrOffset] < 8 {
- t.Fatalf("got p.Pkt.NetworkHeader[dstAddrOffset] = %d, want p.Pkt.NetworkHeader[dstAddrOffset] >= 8", nh[dstAddrOffset])
- }
-
- // Test that the address resolution happened correctly.
- if p.RemoteLinkAddress != "c" {
- t.Fatalf("got p.RemoteLinkAddress = %s, want = c", p.RemoteLinkAddress)
- }
- if p.LocalLinkAddress != "b" {
- t.Fatalf("got p.LocalLinkAddress = %s, want = b", p.LocalLinkAddress)
- }
- }
- })
- }
-}
diff --git a/pkg/tcpip/stack/linkaddrcache_test.go b/pkg/tcpip/stack/linkaddrcache_test.go
deleted file mode 100644
index 33806340e..000000000
--- a/pkg/tcpip/stack/linkaddrcache_test.go
+++ /dev/null
@@ -1,352 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack
-
-import (
- "fmt"
- "math"
- "sync/atomic"
- "testing"
- "time"
-
- "gvisor.dev/gvisor/pkg/sleep"
- "gvisor.dev/gvisor/pkg/sync"
- "gvisor.dev/gvisor/pkg/tcpip"
-)
-
-type testaddr struct {
- addr tcpip.FullAddress
- linkAddr tcpip.LinkAddress
-}
-
-var testAddrs = func() []testaddr {
- var addrs []testaddr
- for i := 0; i < 4*linkAddrCacheSize; i++ {
- addr := fmt.Sprintf("Addr%06d", i)
- addrs = append(addrs, testaddr{
- addr: tcpip.FullAddress{NIC: 1, Addr: tcpip.Address(addr)},
- linkAddr: tcpip.LinkAddress("Link" + addr),
- })
- }
- return addrs
-}()
-
-type testLinkAddressResolver struct {
- cache *linkAddrCache
- delay time.Duration
- onLinkAddressRequest func()
-}
-
-func (r *testLinkAddressResolver) LinkAddressRequest(addr, _ tcpip.Address, _ tcpip.LinkAddress, _ LinkEndpoint) *tcpip.Error {
- time.AfterFunc(r.delay, func() { r.fakeRequest(addr) })
- if f := r.onLinkAddressRequest; f != nil {
- f()
- }
- return nil
-}
-
-func (r *testLinkAddressResolver) fakeRequest(addr tcpip.Address) {
- for _, ta := range testAddrs {
- if ta.addr.Addr == addr {
- r.cache.add(ta.addr, ta.linkAddr)
- break
- }
- }
-}
-
-func (*testLinkAddressResolver) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bool) {
- if addr == "broadcast" {
- return "mac_broadcast", true
- }
- return "", false
-}
-
-func (*testLinkAddressResolver) LinkAddressProtocol() tcpip.NetworkProtocolNumber {
- return 1
-}
-
-func getBlocking(c *linkAddrCache, addr tcpip.FullAddress, linkRes LinkAddressResolver) (tcpip.LinkAddress, *tcpip.Error) {
- w := sleep.Waker{}
- s := sleep.Sleeper{}
- s.AddWaker(&w, 123)
- defer s.Done()
-
- for {
- if got, _, err := c.get(addr, linkRes, "", nil, &w); err != tcpip.ErrWouldBlock {
- return got, err
- }
- s.Fetch(true)
- }
-}
-
-func TestCacheOverflow(t *testing.T) {
- c := newLinkAddrCache(1<<63-1, 1*time.Second, 3)
- for i := len(testAddrs) - 1; i >= 0; i-- {
- e := testAddrs[i]
- c.add(e.addr, e.linkAddr)
- got, _, err := c.get(e.addr, nil, "", nil, nil)
- if err != nil {
- t.Errorf("insert %d, c.get(%q)=%q, got error: %v", i, string(e.addr.Addr), got, err)
- }
- if got != e.linkAddr {
- t.Errorf("insert %d, c.get(%q)=%q, want %q", i, string(e.addr.Addr), got, e.linkAddr)
- }
- }
- // Expect to find at least half of the most recent entries.
- for i := 0; i < linkAddrCacheSize/2; i++ {
- e := testAddrs[i]
- got, _, err := c.get(e.addr, nil, "", nil, nil)
- if err != nil {
- t.Errorf("check %d, c.get(%q)=%q, got error: %v", i, string(e.addr.Addr), got, err)
- }
- if got != e.linkAddr {
- t.Errorf("check %d, c.get(%q)=%q, want %q", i, string(e.addr.Addr), got, e.linkAddr)
- }
- }
- // The earliest entries should no longer be in the cache.
- for i := len(testAddrs) - 1; i >= len(testAddrs)-linkAddrCacheSize; i-- {
- e := testAddrs[i]
- if _, _, err := c.get(e.addr, nil, "", nil, nil); err != tcpip.ErrNoLinkAddress {
- t.Errorf("check %d, c.get(%q), got error: %v, want: error ErrNoLinkAddress", i, string(e.addr.Addr), err)
- }
- }
-}
-
-func TestCacheConcurrent(t *testing.T) {
- c := newLinkAddrCache(1<<63-1, 1*time.Second, 3)
-
- var wg sync.WaitGroup
- for r := 0; r < 16; r++ {
- wg.Add(1)
- go func() {
- for _, e := range testAddrs {
- c.add(e.addr, e.linkAddr)
- c.get(e.addr, nil, "", nil, nil) // make work for gotsan
- }
- wg.Done()
- }()
- }
- wg.Wait()
-
- // All goroutines add in the same order and add more values than
- // can fit in the cache, so our eviction strategy requires that
- // the last entry be present and the first be missing.
- e := testAddrs[len(testAddrs)-1]
- got, _, err := c.get(e.addr, nil, "", nil, nil)
- if err != nil {
- t.Errorf("c.get(%q)=%q, got error: %v", string(e.addr.Addr), got, err)
- }
- if got != e.linkAddr {
- t.Errorf("c.get(%q)=%q, want %q", string(e.addr.Addr), got, e.linkAddr)
- }
-
- e = testAddrs[0]
- if _, _, err := c.get(e.addr, nil, "", nil, nil); err != tcpip.ErrNoLinkAddress {
- t.Errorf("c.get(%q), got error: %v, want: error ErrNoLinkAddress", string(e.addr.Addr), err)
- }
-}
-
-func TestCacheAgeLimit(t *testing.T) {
- c := newLinkAddrCache(1*time.Millisecond, 1*time.Second, 3)
- e := testAddrs[0]
- c.add(e.addr, e.linkAddr)
- time.Sleep(50 * time.Millisecond)
- if _, _, err := c.get(e.addr, nil, "", nil, nil); err != tcpip.ErrNoLinkAddress {
- t.Errorf("c.get(%q), got error: %v, want: error ErrNoLinkAddress", string(e.addr.Addr), err)
- }
-}
-
-func TestCacheReplace(t *testing.T) {
- c := newLinkAddrCache(1<<63-1, 1*time.Second, 3)
- e := testAddrs[0]
- l2 := e.linkAddr + "2"
- c.add(e.addr, e.linkAddr)
- got, _, err := c.get(e.addr, nil, "", nil, nil)
- if err != nil {
- t.Errorf("c.get(%q)=%q, got error: %v", string(e.addr.Addr), got, err)
- }
- if got != e.linkAddr {
- t.Errorf("c.get(%q)=%q, want %q", string(e.addr.Addr), got, e.linkAddr)
- }
-
- c.add(e.addr, l2)
- got, _, err = c.get(e.addr, nil, "", nil, nil)
- if err != nil {
- t.Errorf("c.get(%q)=%q, got error: %v", string(e.addr.Addr), got, err)
- }
- if got != l2 {
- t.Errorf("c.get(%q)=%q, want %q", string(e.addr.Addr), got, l2)
- }
-}
-
-func TestCacheResolution(t *testing.T) {
- // There is a race condition causing this test to fail when the executor
- // takes longer than the resolution timeout to call linkAddrCache.get. This
- // is especially common when this test is run with gotsan.
- //
- // Using a large resolution timeout decreases the probability of experiencing
- // this race condition and does not affect how long this test takes to run.
- c := newLinkAddrCache(1<<63-1, math.MaxInt64, 1)
- linkRes := &testLinkAddressResolver{cache: c}
- for i, ta := range testAddrs {
- got, err := getBlocking(c, ta.addr, linkRes)
- if err != nil {
- t.Errorf("check %d, c.get(%q)=%q, got error: %v", i, string(ta.addr.Addr), got, err)
- }
- if got != ta.linkAddr {
- t.Errorf("check %d, c.get(%q)=%q, want %q", i, string(ta.addr.Addr), got, ta.linkAddr)
- }
- }
-
- // Check that after resolved, address stays in the cache and never returns WouldBlock.
- for i := 0; i < 10; i++ {
- e := testAddrs[len(testAddrs)-1]
- got, _, err := c.get(e.addr, linkRes, "", nil, nil)
- if err != nil {
- t.Errorf("c.get(%q)=%q, got error: %v", string(e.addr.Addr), got, err)
- }
- if got != e.linkAddr {
- t.Errorf("c.get(%q)=%q, want %q", string(e.addr.Addr), got, e.linkAddr)
- }
- }
-}
-
-func TestCacheResolutionFailed(t *testing.T) {
- c := newLinkAddrCache(1<<63-1, 10*time.Millisecond, 5)
- linkRes := &testLinkAddressResolver{cache: c}
-
- var requestCount uint32
- linkRes.onLinkAddressRequest = func() {
- atomic.AddUint32(&requestCount, 1)
- }
-
- // First, sanity check that resolution is working...
- e := testAddrs[0]
- got, err := getBlocking(c, e.addr, linkRes)
- if err != nil {
- t.Errorf("c.get(%q)=%q, got error: %v", string(e.addr.Addr), got, err)
- }
- if got != e.linkAddr {
- t.Errorf("c.get(%q)=%q, want %q", string(e.addr.Addr), got, e.linkAddr)
- }
-
- before := atomic.LoadUint32(&requestCount)
-
- e.addr.Addr += "2"
- if _, err := getBlocking(c, e.addr, linkRes); err != tcpip.ErrNoLinkAddress {
- t.Errorf("c.get(%q), got error: %v, want: error ErrNoLinkAddress", string(e.addr.Addr), err)
- }
-
- if got, want := int(atomic.LoadUint32(&requestCount)-before), c.resolutionAttempts; got != want {
- t.Errorf("got link address request count = %d, want = %d", got, want)
- }
-}
-
-func TestCacheResolutionTimeout(t *testing.T) {
- resolverDelay := 500 * time.Millisecond
- expiration := resolverDelay / 10
- c := newLinkAddrCache(expiration, 1*time.Millisecond, 3)
- linkRes := &testLinkAddressResolver{cache: c, delay: resolverDelay}
-
- e := testAddrs[0]
- if _, err := getBlocking(c, e.addr, linkRes); err != tcpip.ErrNoLinkAddress {
- t.Errorf("c.get(%q), got error: %v, want: error ErrNoLinkAddress", string(e.addr.Addr), err)
- }
-}
-
-// TestStaticResolution checks that static link addresses are resolved immediately and don't
-// send resolution requests.
-func TestStaticResolution(t *testing.T) {
- c := newLinkAddrCache(1<<63-1, time.Millisecond, 1)
- linkRes := &testLinkAddressResolver{cache: c, delay: time.Minute}
-
- addr := tcpip.Address("broadcast")
- want := tcpip.LinkAddress("mac_broadcast")
- got, _, err := c.get(tcpip.FullAddress{Addr: addr}, linkRes, "", nil, nil)
- if err != nil {
- t.Errorf("c.get(%q)=%q, got error: %v", string(addr), string(got), err)
- }
- if got != want {
- t.Errorf("c.get(%q)=%q, want %q", string(addr), string(got), string(want))
- }
-}
-
-// TestCacheWaker verifies that RemoveWaker removes a waker previously added
-// through get().
-func TestCacheWaker(t *testing.T) {
- c := newLinkAddrCache(1<<63-1, 1*time.Second, 3)
-
- // First, sanity check that wakers are working.
- {
- linkRes := &testLinkAddressResolver{cache: c}
- s := sleep.Sleeper{}
- defer s.Done()
-
- const wakerID = 1
- w := sleep.Waker{}
- s.AddWaker(&w, wakerID)
-
- e := testAddrs[0]
-
- if _, _, err := c.get(e.addr, linkRes, "", nil, &w); err != tcpip.ErrWouldBlock {
- t.Fatalf("got c.get(%q, _, _, _, _) = %s, want = %s", e.addr.Addr, err, tcpip.ErrWouldBlock)
- }
- id, ok := s.Fetch(true /* block */)
- if !ok {
- t.Fatal("got s.Fetch(true) = (_, false), want = (_, true)")
- }
- if id != wakerID {
- t.Fatalf("got s.Fetch(true) = (%d, %t), want = (%d, true)", id, ok, wakerID)
- }
-
- if got, _, err := c.get(e.addr, linkRes, "", nil, nil); err != nil {
- t.Fatalf("c.get(%q, _, _, _, _): %s", e.addr.Addr, err)
- } else if got != e.linkAddr {
- t.Fatalf("got c.get(%q) = %q, want = %q", e.addr.Addr, got, e.linkAddr)
- }
- }
-
- // Check that RemoveWaker works.
- {
- linkRes := &testLinkAddressResolver{cache: c}
- s := sleep.Sleeper{}
- defer s.Done()
-
- const wakerID = 2 // different than the ID used in the sanity check
- w := sleep.Waker{}
- s.AddWaker(&w, wakerID)
-
- e := testAddrs[1]
- linkRes.onLinkAddressRequest = func() {
- // Remove the waker before the linkAddrCache has the opportunity to send
- // a notification.
- c.removeWaker(e.addr, &w)
- }
-
- if _, _, err := c.get(e.addr, linkRes, "", nil, &w); err != tcpip.ErrWouldBlock {
- t.Fatalf("got c.get(%q, _, _, _, _) = %s, want = %s", e.addr.Addr, err, tcpip.ErrWouldBlock)
- }
-
- if got, err := getBlocking(c, e.addr, linkRes); err != nil {
- t.Fatalf("c.get(%q, _, _, _, _): %s", e.addr.Addr, err)
- } else if got != e.linkAddr {
- t.Fatalf("c.get(%q) = %q, want = %q", e.addr.Addr, got, e.linkAddr)
- }
-
- if id, ok := s.Fetch(false /* block */); ok {
- t.Fatalf("unexpected notification from waker with id %d", id)
- }
- }
-}
diff --git a/pkg/tcpip/stack/linkaddrentry_list.go b/pkg/tcpip/stack/linkaddrentry_list.go
new file mode 100644
index 000000000..1250b89f8
--- /dev/null
+++ b/pkg/tcpip/stack/linkaddrentry_list.go
@@ -0,0 +1,193 @@
+package stack
+
+// ElementMapper provides an identity mapping by default.
+//
+// This can be replaced to provide a struct that maps elements to linker
+// objects, if they are not the same. An ElementMapper is not typically
+// required if: Linker is left as is, Element is left as is, or Linker and
+// Element are the same type.
+type linkAddrEntryElementMapper struct{}
+
+// linkerFor maps an Element to a Linker.
+//
+// This default implementation should be inlined.
+//
+//go:nosplit
+func (linkAddrEntryElementMapper) linkerFor(elem *linkAddrEntry) *linkAddrEntry { return elem }
+
+// List is an intrusive list. Entries can be added to or removed from the list
+// in O(1) time and with no additional memory allocations.
+//
+// The zero value for List is an empty list ready to use.
+//
+// To iterate over a list (where l is a List):
+// for e := l.Front(); e != nil; e = e.Next() {
+// // do something with e.
+// }
+//
+// +stateify savable
+type linkAddrEntryList struct {
+ head *linkAddrEntry
+ tail *linkAddrEntry
+}
+
+// Reset resets list l to the empty state.
+func (l *linkAddrEntryList) Reset() {
+ l.head = nil
+ l.tail = nil
+}
+
+// Empty returns true iff the list is empty.
+func (l *linkAddrEntryList) Empty() bool {
+ return l.head == nil
+}
+
+// Front returns the first element of list l or nil.
+func (l *linkAddrEntryList) Front() *linkAddrEntry {
+ return l.head
+}
+
+// Back returns the last element of list l or nil.
+func (l *linkAddrEntryList) Back() *linkAddrEntry {
+ return l.tail
+}
+
+// Len returns the number of elements in the list.
+//
+// NOTE: This is an O(n) operation.
+func (l *linkAddrEntryList) Len() (count int) {
+ for e := l.Front(); e != nil; e = (linkAddrEntryElementMapper{}.linkerFor(e)).Next() {
+ count++
+ }
+ return count
+}
+
+// PushFront inserts the element e at the front of list l.
+func (l *linkAddrEntryList) PushFront(e *linkAddrEntry) {
+ linker := linkAddrEntryElementMapper{}.linkerFor(e)
+ linker.SetNext(l.head)
+ linker.SetPrev(nil)
+ if l.head != nil {
+ linkAddrEntryElementMapper{}.linkerFor(l.head).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+
+ l.head = e
+}
+
+// PushBack inserts the element e at the back of list l.
+func (l *linkAddrEntryList) PushBack(e *linkAddrEntry) {
+ linker := linkAddrEntryElementMapper{}.linkerFor(e)
+ linker.SetNext(nil)
+ linker.SetPrev(l.tail)
+ if l.tail != nil {
+ linkAddrEntryElementMapper{}.linkerFor(l.tail).SetNext(e)
+ } else {
+ l.head = e
+ }
+
+ l.tail = e
+}
+
+// PushBackList inserts list m at the end of list l, emptying m.
+func (l *linkAddrEntryList) PushBackList(m *linkAddrEntryList) {
+ if l.head == nil {
+ l.head = m.head
+ l.tail = m.tail
+ } else if m.head != nil {
+ linkAddrEntryElementMapper{}.linkerFor(l.tail).SetNext(m.head)
+ linkAddrEntryElementMapper{}.linkerFor(m.head).SetPrev(l.tail)
+
+ l.tail = m.tail
+ }
+ m.head = nil
+ m.tail = nil
+}
+
+// InsertAfter inserts e after b.
+func (l *linkAddrEntryList) InsertAfter(b, e *linkAddrEntry) {
+ bLinker := linkAddrEntryElementMapper{}.linkerFor(b)
+ eLinker := linkAddrEntryElementMapper{}.linkerFor(e)
+
+ a := bLinker.Next()
+
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ bLinker.SetNext(e)
+
+ if a != nil {
+ linkAddrEntryElementMapper{}.linkerFor(a).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+}
+
+// InsertBefore inserts e before a.
+func (l *linkAddrEntryList) InsertBefore(a, e *linkAddrEntry) {
+ aLinker := linkAddrEntryElementMapper{}.linkerFor(a)
+ eLinker := linkAddrEntryElementMapper{}.linkerFor(e)
+
+ b := aLinker.Prev()
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ aLinker.SetPrev(e)
+
+ if b != nil {
+ linkAddrEntryElementMapper{}.linkerFor(b).SetNext(e)
+ } else {
+ l.head = e
+ }
+}
+
+// Remove removes e from l.
+func (l *linkAddrEntryList) Remove(e *linkAddrEntry) {
+ linker := linkAddrEntryElementMapper{}.linkerFor(e)
+ prev := linker.Prev()
+ next := linker.Next()
+
+ if prev != nil {
+ linkAddrEntryElementMapper{}.linkerFor(prev).SetNext(next)
+ } else if l.head == e {
+ l.head = next
+ }
+
+ if next != nil {
+ linkAddrEntryElementMapper{}.linkerFor(next).SetPrev(prev)
+ } else if l.tail == e {
+ l.tail = prev
+ }
+
+ linker.SetNext(nil)
+ linker.SetPrev(nil)
+}
+
+// Entry is a default implementation of Linker. Users can add anonymous fields
+// of this type to their structs to make them automatically implement the
+// methods needed by List.
+//
+// +stateify savable
+type linkAddrEntryEntry struct {
+ next *linkAddrEntry
+ prev *linkAddrEntry
+}
+
+// Next returns the entry that follows e in the list.
+func (e *linkAddrEntryEntry) Next() *linkAddrEntry {
+ return e.next
+}
+
+// Prev returns the entry that precedes e in the list.
+func (e *linkAddrEntryEntry) Prev() *linkAddrEntry {
+ return e.prev
+}
+
+// SetNext assigns 'entry' as the entry that follows e in the list.
+func (e *linkAddrEntryEntry) SetNext(elem *linkAddrEntry) {
+ e.next = elem
+}
+
+// SetPrev assigns 'entry' as the entry that precedes e in the list.
+func (e *linkAddrEntryEntry) SetPrev(elem *linkAddrEntry) {
+ e.prev = elem
+}
diff --git a/pkg/tcpip/stack/ndp_test.go b/pkg/tcpip/stack/ndp_test.go
deleted file mode 100644
index 67dc5364f..000000000
--- a/pkg/tcpip/stack/ndp_test.go
+++ /dev/null
@@ -1,5419 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack_test
-
-import (
- "context"
- "encoding/binary"
- "fmt"
- "testing"
- "time"
-
- "github.com/google/go-cmp/cmp"
- "gvisor.dev/gvisor/pkg/rand"
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
- "gvisor.dev/gvisor/pkg/tcpip/checker"
- "gvisor.dev/gvisor/pkg/tcpip/header"
- "gvisor.dev/gvisor/pkg/tcpip/link/channel"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
- "gvisor.dev/gvisor/pkg/tcpip/stack"
- "gvisor.dev/gvisor/pkg/tcpip/transport/icmp"
- "gvisor.dev/gvisor/pkg/tcpip/transport/udp"
- "gvisor.dev/gvisor/pkg/waiter"
-)
-
-const (
- addr1 = tcpip.Address("\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01")
- addr2 = tcpip.Address("\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02")
- addr3 = tcpip.Address("\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03")
- linkAddr1 = tcpip.LinkAddress("\x02\x02\x03\x04\x05\x06")
- linkAddr2 = tcpip.LinkAddress("\x02\x02\x03\x04\x05\x07")
- linkAddr3 = tcpip.LinkAddress("\x02\x02\x03\x04\x05\x08")
- linkAddr4 = tcpip.LinkAddress("\x02\x02\x03\x04\x05\x09")
-
- // Extra time to use when waiting for an async event to occur.
- defaultAsyncPositiveEventTimeout = 10 * time.Second
-
- // Extra time to use when waiting for an async event to not occur.
- //
- // Since a negative check is used to make sure an event did not happen, it is
- // okay to use a smaller timeout compared to the positive case since execution
- // stall in regards to the monotonic clock will not affect the expected
- // outcome.
- defaultAsyncNegativeEventTimeout = time.Second
-)
-
-var (
- llAddr1 = header.LinkLocalAddr(linkAddr1)
- llAddr2 = header.LinkLocalAddr(linkAddr2)
- llAddr3 = header.LinkLocalAddr(linkAddr3)
- llAddr4 = header.LinkLocalAddr(linkAddr4)
- dstAddr = tcpip.FullAddress{
- Addr: "\x0a\x0b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01",
- Port: 25,
- }
-)
-
-func addrForSubnet(subnet tcpip.Subnet, linkAddr tcpip.LinkAddress) tcpip.AddressWithPrefix {
- if !header.IsValidUnicastEthernetAddress(linkAddr) {
- return tcpip.AddressWithPrefix{}
- }
-
- addrBytes := []byte(subnet.ID())
- header.EthernetAdddressToModifiedEUI64IntoBuf(linkAddr, addrBytes[header.IIDOffsetInIPv6Address:])
- return tcpip.AddressWithPrefix{
- Address: tcpip.Address(addrBytes),
- PrefixLen: 64,
- }
-}
-
-// prefixSubnetAddr returns a prefix (Address + Length), the prefix's equivalent
-// tcpip.Subnet, and an address where the lower half of the address is composed
-// of the EUI-64 of linkAddr if it is a valid unicast ethernet address.
-func prefixSubnetAddr(offset uint8, linkAddr tcpip.LinkAddress) (tcpip.AddressWithPrefix, tcpip.Subnet, tcpip.AddressWithPrefix) {
- prefixBytes := []byte{1, 2, 3, 4, 5, 6, 7, 8 + offset, 0, 0, 0, 0, 0, 0, 0, 0}
- prefix := tcpip.AddressWithPrefix{
- Address: tcpip.Address(prefixBytes),
- PrefixLen: 64,
- }
-
- subnet := prefix.Subnet()
-
- return prefix, subnet, addrForSubnet(subnet, linkAddr)
-}
-
-// ndpDADEvent is a set of parameters that was passed to
-// ndpDispatcher.OnDuplicateAddressDetectionStatus.
-type ndpDADEvent struct {
- nicID tcpip.NICID
- addr tcpip.Address
- resolved bool
- err *tcpip.Error
-}
-
-type ndpRouterEvent struct {
- nicID tcpip.NICID
- addr tcpip.Address
- // true if router was discovered, false if invalidated.
- discovered bool
-}
-
-type ndpPrefixEvent struct {
- nicID tcpip.NICID
- prefix tcpip.Subnet
- // true if prefix was discovered, false if invalidated.
- discovered bool
-}
-
-type ndpAutoGenAddrEventType int
-
-const (
- newAddr ndpAutoGenAddrEventType = iota
- deprecatedAddr
- invalidatedAddr
-)
-
-type ndpAutoGenAddrEvent struct {
- nicID tcpip.NICID
- addr tcpip.AddressWithPrefix
- eventType ndpAutoGenAddrEventType
-}
-
-type ndpRDNSS struct {
- addrs []tcpip.Address
- lifetime time.Duration
-}
-
-type ndpRDNSSEvent struct {
- nicID tcpip.NICID
- rdnss ndpRDNSS
-}
-
-type ndpDNSSLEvent struct {
- nicID tcpip.NICID
- domainNames []string
- lifetime time.Duration
-}
-
-type ndpDHCPv6Event struct {
- nicID tcpip.NICID
- configuration stack.DHCPv6ConfigurationFromNDPRA
-}
-
-var _ stack.NDPDispatcher = (*ndpDispatcher)(nil)
-
-// ndpDispatcher implements NDPDispatcher so tests can know when various NDP
-// related events happen for test purposes.
-type ndpDispatcher struct {
- dadC chan ndpDADEvent
- routerC chan ndpRouterEvent
- rememberRouter bool
- prefixC chan ndpPrefixEvent
- rememberPrefix bool
- autoGenAddrC chan ndpAutoGenAddrEvent
- rdnssC chan ndpRDNSSEvent
- dnsslC chan ndpDNSSLEvent
- routeTable []tcpip.Route
- dhcpv6ConfigurationC chan ndpDHCPv6Event
-}
-
-// Implements stack.NDPDispatcher.OnDuplicateAddressDetectionStatus.
-func (n *ndpDispatcher) OnDuplicateAddressDetectionStatus(nicID tcpip.NICID, addr tcpip.Address, resolved bool, err *tcpip.Error) {
- if n.dadC != nil {
- n.dadC <- ndpDADEvent{
- nicID,
- addr,
- resolved,
- err,
- }
- }
-}
-
-// Implements stack.NDPDispatcher.OnDefaultRouterDiscovered.
-func (n *ndpDispatcher) OnDefaultRouterDiscovered(nicID tcpip.NICID, addr tcpip.Address) bool {
- if c := n.routerC; c != nil {
- c <- ndpRouterEvent{
- nicID,
- addr,
- true,
- }
- }
-
- return n.rememberRouter
-}
-
-// Implements stack.NDPDispatcher.OnDefaultRouterInvalidated.
-func (n *ndpDispatcher) OnDefaultRouterInvalidated(nicID tcpip.NICID, addr tcpip.Address) {
- if c := n.routerC; c != nil {
- c <- ndpRouterEvent{
- nicID,
- addr,
- false,
- }
- }
-}
-
-// Implements stack.NDPDispatcher.OnOnLinkPrefixDiscovered.
-func (n *ndpDispatcher) OnOnLinkPrefixDiscovered(nicID tcpip.NICID, prefix tcpip.Subnet) bool {
- if c := n.prefixC; c != nil {
- c <- ndpPrefixEvent{
- nicID,
- prefix,
- true,
- }
- }
-
- return n.rememberPrefix
-}
-
-// Implements stack.NDPDispatcher.OnOnLinkPrefixInvalidated.
-func (n *ndpDispatcher) OnOnLinkPrefixInvalidated(nicID tcpip.NICID, prefix tcpip.Subnet) {
- if c := n.prefixC; c != nil {
- c <- ndpPrefixEvent{
- nicID,
- prefix,
- false,
- }
- }
-}
-
-func (n *ndpDispatcher) OnAutoGenAddress(nicID tcpip.NICID, addr tcpip.AddressWithPrefix) bool {
- if c := n.autoGenAddrC; c != nil {
- c <- ndpAutoGenAddrEvent{
- nicID,
- addr,
- newAddr,
- }
- }
- return true
-}
-
-func (n *ndpDispatcher) OnAutoGenAddressDeprecated(nicID tcpip.NICID, addr tcpip.AddressWithPrefix) {
- if c := n.autoGenAddrC; c != nil {
- c <- ndpAutoGenAddrEvent{
- nicID,
- addr,
- deprecatedAddr,
- }
- }
-}
-
-func (n *ndpDispatcher) OnAutoGenAddressInvalidated(nicID tcpip.NICID, addr tcpip.AddressWithPrefix) {
- if c := n.autoGenAddrC; c != nil {
- c <- ndpAutoGenAddrEvent{
- nicID,
- addr,
- invalidatedAddr,
- }
- }
-}
-
-// Implements stack.NDPDispatcher.OnRecursiveDNSServerOption.
-func (n *ndpDispatcher) OnRecursiveDNSServerOption(nicID tcpip.NICID, addrs []tcpip.Address, lifetime time.Duration) {
- if c := n.rdnssC; c != nil {
- c <- ndpRDNSSEvent{
- nicID,
- ndpRDNSS{
- addrs,
- lifetime,
- },
- }
- }
-}
-
-// Implements stack.NDPDispatcher.OnDNSSearchListOption.
-func (n *ndpDispatcher) OnDNSSearchListOption(nicID tcpip.NICID, domainNames []string, lifetime time.Duration) {
- if n.dnsslC != nil {
- n.dnsslC <- ndpDNSSLEvent{
- nicID,
- domainNames,
- lifetime,
- }
- }
-}
-
-// Implements stack.NDPDispatcher.OnDHCPv6Configuration.
-func (n *ndpDispatcher) OnDHCPv6Configuration(nicID tcpip.NICID, configuration stack.DHCPv6ConfigurationFromNDPRA) {
- if c := n.dhcpv6ConfigurationC; c != nil {
- c <- ndpDHCPv6Event{
- nicID,
- configuration,
- }
- }
-}
-
-// channelLinkWithHeaderLength is a channel.Endpoint with a configurable
-// header length.
-type channelLinkWithHeaderLength struct {
- *channel.Endpoint
- headerLength uint16
-}
-
-func (l *channelLinkWithHeaderLength) MaxHeaderLength() uint16 {
- return l.headerLength
-}
-
-// Check e to make sure that the event is for addr on nic with ID 1, and the
-// resolved flag set to resolved with the specified err.
-func checkDADEvent(e ndpDADEvent, nicID tcpip.NICID, addr tcpip.Address, resolved bool, err *tcpip.Error) string {
- return cmp.Diff(ndpDADEvent{nicID: nicID, addr: addr, resolved: resolved, err: err}, e, cmp.AllowUnexported(e))
-}
-
-// TestDADDisabled tests that an address successfully resolves immediately
-// when DAD is not enabled (the default for an empty stack.Options).
-func TestDADDisabled(t *testing.T) {
- const nicID = 1
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- }
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPDisp: &ndpDisp,
- }
-
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(opts)
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- if err := s.AddAddress(nicID, header.IPv6ProtocolNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID, header.IPv6ProtocolNumber, addr1, err)
- }
-
- // Should get the address immediately since we should not have performed
- // DAD on it.
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr1, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected DAD event")
- }
- addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("stack.GetMainNICAddress(%d, %d) err = %s", nicID, header.IPv6ProtocolNumber, err)
- }
- if addr.Address != addr1 {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = %s, want = %s", nicID, header.IPv6ProtocolNumber, addr, addr1)
- }
-
- // We should not have sent any NDP NS messages.
- if got := s.Stats().ICMP.V6PacketsSent.NeighborSolicit.Value(); got != 0 {
- t.Fatalf("got NeighborSolicit = %d, want = 0", got)
- }
-}
-
-// TestDADResolve tests that an address successfully resolves after performing
-// DAD for various values of DupAddrDetectTransmits and RetransmitTimer.
-// Included in the subtests is a test to make sure that an invalid
-// RetransmitTimer (<1ms) values get fixed to the default RetransmitTimer of 1s.
-// This tests also validates the NDP NS packet that is transmitted.
-func TestDADResolve(t *testing.T) {
- const nicID = 1
-
- tests := []struct {
- name string
- linkHeaderLen uint16
- dupAddrDetectTransmits uint8
- retransTimer time.Duration
- expectedRetransmitTimer time.Duration
- }{
- {
- name: "1:1s:1s",
- dupAddrDetectTransmits: 1,
- retransTimer: time.Second,
- expectedRetransmitTimer: time.Second,
- },
- {
- name: "2:1s:1s",
- linkHeaderLen: 1,
- dupAddrDetectTransmits: 2,
- retransTimer: time.Second,
- expectedRetransmitTimer: time.Second,
- },
- {
- name: "1:2s:2s",
- linkHeaderLen: 2,
- dupAddrDetectTransmits: 1,
- retransTimer: 2 * time.Second,
- expectedRetransmitTimer: 2 * time.Second,
- },
- // 0s is an invalid RetransmitTimer timer and will be fixed to
- // the default RetransmitTimer value of 1s.
- {
- name: "1:0s:1s",
- linkHeaderLen: 3,
- dupAddrDetectTransmits: 1,
- retransTimer: 0,
- expectedRetransmitTimer: time.Second,
- },
- }
-
- for _, test := range tests {
- test := test
-
- t.Run(test.name, func(t *testing.T) {
- t.Parallel()
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent),
- }
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPDisp: &ndpDisp,
- }
- opts.NDPConfigs.RetransmitTimer = test.retransTimer
- opts.NDPConfigs.DupAddrDetectTransmits = test.dupAddrDetectTransmits
-
- e := channelLinkWithHeaderLength{
- Endpoint: channel.New(int(test.dupAddrDetectTransmits), 1280, linkAddr1),
- headerLength: test.linkHeaderLen,
- }
- e.Endpoint.LinkEPCapabilities |= stack.CapabilityResolutionRequired
- s := stack.New(opts)
- if err := s.CreateNIC(nicID, &e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- // We add a default route so the call to FindRoute below will succeed
- // once we have an assigned address.
- s.SetRouteTable([]tcpip.Route{{
- Destination: header.IPv6EmptySubnet,
- Gateway: addr3,
- NIC: nicID,
- }})
-
- if err := s.AddAddress(nicID, header.IPv6ProtocolNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID, header.IPv6ProtocolNumber, addr1, err)
- }
-
- // Address should not be considered bound to the NIC yet (DAD ongoing).
- if addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber); err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %s), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- } else if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
-
- // Make sure the address does not resolve before the resolution time has
- // passed.
- time.Sleep(test.expectedRetransmitTimer*time.Duration(test.dupAddrDetectTransmits) - defaultAsyncNegativeEventTimeout)
- if addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber); err != nil {
- t.Errorf("got stack.GetMainNICAddress(%d, %d) = (_, %s), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- } else if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Errorf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
- // Should not get a route even if we specify the local address as the
- // tentative address.
- {
- r, err := s.FindRoute(nicID, "", addr2, header.IPv6ProtocolNumber, false)
- if err != tcpip.ErrNoRoute {
- t.Errorf("got FindRoute(%d, '', %s, %d, false) = (%+v, %v), want = (_, %s)", nicID, addr2, header.IPv6ProtocolNumber, r, err, tcpip.ErrNoRoute)
- }
- r.Release()
- }
- {
- r, err := s.FindRoute(nicID, addr1, addr2, header.IPv6ProtocolNumber, false)
- if err != tcpip.ErrNoRoute {
- t.Errorf("got FindRoute(%d, %s, %s, %d, false) = (%+v, %v), want = (_, %s)", nicID, addr1, addr2, header.IPv6ProtocolNumber, r, err, tcpip.ErrNoRoute)
- }
- r.Release()
- }
-
- if t.Failed() {
- t.FailNow()
- }
-
- // Wait for DAD to resolve.
- select {
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD resolution")
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr1, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- }
- if addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber); err != nil {
- t.Errorf("got stack.GetMainNICAddress(%d, %d) = (_, %s), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- } else if addr.Address != addr1 {
- t.Errorf("got stack.GetMainNICAddress(%d, %d) = %s, want = %s", nicID, header.IPv6ProtocolNumber, addr, addr1)
- }
- // Should get a route using the address now that it is resolved.
- {
- r, err := s.FindRoute(nicID, "", addr2, header.IPv6ProtocolNumber, false)
- if err != nil {
- t.Errorf("got FindRoute(%d, '', %s, %d, false): %s", nicID, addr2, header.IPv6ProtocolNumber, err)
- } else if r.LocalAddress != addr1 {
- t.Errorf("got r.LocalAddress = %s, want = %s", r.LocalAddress, addr1)
- }
- r.Release()
- }
- {
- r, err := s.FindRoute(nicID, addr1, addr2, header.IPv6ProtocolNumber, false)
- if err != nil {
- t.Errorf("got FindRoute(%d, %s, %s, %d, false): %s", nicID, addr1, addr2, header.IPv6ProtocolNumber, err)
- } else if r.LocalAddress != addr1 {
- t.Errorf("got r.LocalAddress = %s, want = %s", r.LocalAddress, addr1)
- }
- r.Release()
- }
-
- if t.Failed() {
- t.FailNow()
- }
-
- // Should not have sent any more NS messages.
- if got := s.Stats().ICMP.V6PacketsSent.NeighborSolicit.Value(); got != uint64(test.dupAddrDetectTransmits) {
- t.Fatalf("got NeighborSolicit = %d, want = %d", got, test.dupAddrDetectTransmits)
- }
-
- // Validate the sent Neighbor Solicitation messages.
- for i := uint8(0); i < test.dupAddrDetectTransmits; i++ {
- p, _ := e.ReadContext(context.Background())
-
- // Make sure its an IPv6 packet.
- if p.Proto != header.IPv6ProtocolNumber {
- t.Fatalf("got Proto = %d, want = %d", p.Proto, header.IPv6ProtocolNumber)
- }
-
- // Make sure the right remote link address is used.
- snmc := header.SolicitedNodeAddr(addr1)
- if want := header.EthernetAddressFromMulticastIPv6Address(snmc); p.Route.RemoteLinkAddress != want {
- t.Errorf("got remote link address = %s, want = %s", p.Route.RemoteLinkAddress, want)
- }
-
- // Check NDP NS packet.
- //
- // As per RFC 4861 section 4.3, a possible option is the Source Link
- // Layer option, but this option MUST NOT be included when the source
- // address of the packet is the unspecified address.
- checker.IPv6(t, stack.PayloadSince(p.Pkt.NetworkHeader()),
- checker.SrcAddr(header.IPv6Any),
- checker.DstAddr(snmc),
- checker.TTL(header.NDPHopLimit),
- checker.NDPNS(
- checker.NDPNSTargetAddress(addr1),
- checker.NDPNSOptions(nil),
- ))
-
- if l, want := p.Pkt.AvailableHeaderBytes(), int(test.linkHeaderLen); l != want {
- t.Errorf("got p.Pkt.AvailableHeaderBytes() = %d; want = %d", l, want)
- }
- }
- })
- }
-}
-
-// TestDADFail tests to make sure that the DAD process fails if another node is
-// detected to be performing DAD on the same address (receive an NS message from
-// a node doing DAD for the same address), or if another node is detected to own
-// the address already (receive an NA message for the tentative address).
-func TestDADFail(t *testing.T) {
- const nicID = 1
-
- tests := []struct {
- name string
- makeBuf func(tgt tcpip.Address) buffer.Prependable
- getStat func(s tcpip.ICMPv6ReceivedPacketStats) *tcpip.StatCounter
- }{
- {
- "RxSolicit",
- func(tgt tcpip.Address) buffer.Prependable {
- hdr := buffer.NewPrependable(header.IPv6MinimumSize + header.ICMPv6NeighborSolicitMinimumSize)
- pkt := header.ICMPv6(hdr.Prepend(header.ICMPv6NeighborSolicitMinimumSize))
- pkt.SetType(header.ICMPv6NeighborSolicit)
- ns := header.NDPNeighborSolicit(pkt.NDPPayload())
- ns.SetTargetAddress(tgt)
- snmc := header.SolicitedNodeAddr(tgt)
- pkt.SetChecksum(header.ICMPv6Checksum(pkt, header.IPv6Any, snmc, buffer.VectorisedView{}))
- payloadLength := hdr.UsedLength()
- ip := header.IPv6(hdr.Prepend(header.IPv6MinimumSize))
- ip.Encode(&header.IPv6Fields{
- PayloadLength: uint16(payloadLength),
- NextHeader: uint8(icmp.ProtocolNumber6),
- HopLimit: 255,
- SrcAddr: header.IPv6Any,
- DstAddr: snmc,
- })
-
- return hdr
-
- },
- func(s tcpip.ICMPv6ReceivedPacketStats) *tcpip.StatCounter {
- return s.NeighborSolicit
- },
- },
- {
- "RxAdvert",
- func(tgt tcpip.Address) buffer.Prependable {
- naSize := header.ICMPv6NeighborAdvertMinimumSize + header.NDPLinkLayerAddressSize
- hdr := buffer.NewPrependable(header.IPv6MinimumSize + naSize)
- pkt := header.ICMPv6(hdr.Prepend(naSize))
- pkt.SetType(header.ICMPv6NeighborAdvert)
- na := header.NDPNeighborAdvert(pkt.NDPPayload())
- na.SetSolicitedFlag(true)
- na.SetOverrideFlag(true)
- na.SetTargetAddress(tgt)
- na.Options().Serialize(header.NDPOptionsSerializer{
- header.NDPTargetLinkLayerAddressOption(linkAddr1),
- })
- pkt.SetChecksum(header.ICMPv6Checksum(pkt, tgt, header.IPv6AllNodesMulticastAddress, buffer.VectorisedView{}))
- payloadLength := hdr.UsedLength()
- ip := header.IPv6(hdr.Prepend(header.IPv6MinimumSize))
- ip.Encode(&header.IPv6Fields{
- PayloadLength: uint16(payloadLength),
- NextHeader: uint8(icmp.ProtocolNumber6),
- HopLimit: 255,
- SrcAddr: tgt,
- DstAddr: header.IPv6AllNodesMulticastAddress,
- })
-
- return hdr
-
- },
- func(s tcpip.ICMPv6ReceivedPacketStats) *tcpip.StatCounter {
- return s.NeighborAdvert
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- }
- ndpConfigs := stack.DefaultNDPConfigurations()
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: ndpConfigs,
- NDPDisp: &ndpDisp,
- }
- opts.NDPConfigs.RetransmitTimer = time.Second * 2
-
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(opts)
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- if err := s.AddAddress(nicID, header.IPv6ProtocolNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID, header.IPv6ProtocolNumber, addr1, err)
- }
-
- // Address should not be considered bound to the NIC yet
- // (DAD ongoing).
- addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
-
- // Receive a packet to simulate multiple nodes owning or
- // attempting to own the same address.
- hdr := test.makeBuf(addr1)
- pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: hdr.View().ToVectorisedView(),
- })
- e.InjectInbound(header.IPv6ProtocolNumber, pkt)
-
- stat := test.getStat(s.Stats().ICMP.V6PacketsReceived)
- if got := stat.Value(); got != 1 {
- t.Fatalf("got stat = %d, want = 1", got)
- }
-
- // Wait for DAD to fail and make sure the address did
- // not get resolved.
- select {
- case <-time.After(time.Duration(ndpConfigs.DupAddrDetectTransmits)*ndpConfigs.RetransmitTimer + time.Second):
- // If we don't get a failure event after the
- // expected resolution time + extra 1s buffer,
- // something is wrong.
- t.Fatal("timed out waiting for DAD failure")
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr1, false, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- }
- addr, err = s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
-
- // Attempting to add the address again should not fail if the address's
- // state was cleaned up when DAD failed.
- if err := s.AddAddress(nicID, header.IPv6ProtocolNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID, header.IPv6ProtocolNumber, addr1, err)
- }
- })
- }
-}
-
-func TestDADStop(t *testing.T) {
- const nicID = 1
-
- tests := []struct {
- name string
- stopFn func(t *testing.T, s *stack.Stack)
- skipFinalAddrCheck bool
- }{
- // Tests to make sure that DAD stops when an address is removed.
- {
- name: "Remove address",
- stopFn: func(t *testing.T, s *stack.Stack) {
- if err := s.RemoveAddress(nicID, addr1); err != nil {
- t.Fatalf("RemoveAddress(%d, %s): %s", nicID, addr1, err)
- }
- },
- },
-
- // Tests to make sure that DAD stops when the NIC is disabled.
- {
- name: "Disable NIC",
- stopFn: func(t *testing.T, s *stack.Stack) {
- if err := s.DisableNIC(nicID); err != nil {
- t.Fatalf("DisableNIC(%d): %s", nicID, err)
- }
- },
- },
-
- // Tests to make sure that DAD stops when the NIC is removed.
- {
- name: "Remove NIC",
- stopFn: func(t *testing.T, s *stack.Stack) {
- if err := s.RemoveNIC(nicID); err != nil {
- t.Fatalf("RemoveNIC(%d): %s", nicID, err)
- }
- },
- // The NIC is removed so we can't check its addresses after calling
- // stopFn.
- skipFinalAddrCheck: true,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- }
- ndpConfigs := stack.NDPConfigurations{
- RetransmitTimer: time.Second,
- DupAddrDetectTransmits: 2,
- }
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPDisp: &ndpDisp,
- NDPConfigs: ndpConfigs,
- }
-
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(opts)
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID, err)
- }
-
- if err := s.AddAddress(nicID, header.IPv6ProtocolNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s): %s", nicID, header.IPv6ProtocolNumber, addr1, err)
- }
-
- // Address should not be considered bound to the NIC yet (DAD ongoing).
- addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
-
- test.stopFn(t, s)
-
- // Wait for DAD to fail (since the address was removed during DAD).
- select {
- case <-time.After(time.Duration(ndpConfigs.DupAddrDetectTransmits)*ndpConfigs.RetransmitTimer + time.Second):
- // If we don't get a failure event after the expected resolution
- // time + extra 1s buffer, something is wrong.
- t.Fatal("timed out waiting for DAD failure")
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr1, false, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- }
-
- if !test.skipFinalAddrCheck {
- addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Errorf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
- }
-
- // Should not have sent more than 1 NS message.
- if got := s.Stats().ICMP.V6PacketsSent.NeighborSolicit.Value(); got > 1 {
- t.Errorf("got NeighborSolicit = %d, want <= 1", got)
- }
- })
- }
-}
-
-// TestSetNDPConfigurationFailsForBadNICID tests to make sure we get an error if
-// we attempt to update NDP configurations using an invalid NICID.
-func TestSetNDPConfigurationFailsForBadNICID(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- })
-
- // No NIC with ID 1 yet.
- if got := s.SetNDPConfigurations(1, stack.NDPConfigurations{}); got != tcpip.ErrUnknownNICID {
- t.Fatalf("got s.SetNDPConfigurations = %v, want = %s", got, tcpip.ErrUnknownNICID)
- }
-}
-
-// TestSetNDPConfigurations tests that we can update and use per-interface NDP
-// configurations without affecting the default NDP configurations or other
-// interfaces' configurations.
-func TestSetNDPConfigurations(t *testing.T) {
- const nicID1 = 1
- const nicID2 = 2
- const nicID3 = 3
-
- tests := []struct {
- name string
- dupAddrDetectTransmits uint8
- retransmitTimer time.Duration
- expectedRetransmitTimer time.Duration
- }{
- {
- "OK",
- 1,
- time.Second,
- time.Second,
- },
- {
- "Invalid Retransmit Timer",
- 1,
- 0,
- time.Second,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPDisp: &ndpDisp,
- })
-
- expectDADEvent := func(nicID tcpip.NICID, addr tcpip.Address) {
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatalf("expected DAD event for %s", addr)
- }
- }
-
- // This NIC(1)'s NDP configurations will be updated to
- // be different from the default.
- if err := s.CreateNIC(nicID1, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID1, err)
- }
-
- // Created before updating NIC(1)'s NDP configurations
- // but updating NIC(1)'s NDP configurations should not
- // affect other existing NICs.
- if err := s.CreateNIC(nicID2, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID2, err)
- }
-
- // Update the NDP configurations on NIC(1) to use DAD.
- configs := stack.NDPConfigurations{
- DupAddrDetectTransmits: test.dupAddrDetectTransmits,
- RetransmitTimer: test.retransmitTimer,
- }
- if err := s.SetNDPConfigurations(nicID1, configs); err != nil {
- t.Fatalf("got SetNDPConfigurations(%d, _) = %s", nicID1, err)
- }
-
- // Created after updating NIC(1)'s NDP configurations
- // but the stack's default NDP configurations should not
- // have been updated.
- if err := s.CreateNIC(nicID3, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID3, err)
- }
-
- // Add addresses for each NIC.
- if err := s.AddAddress(nicID1, header.IPv6ProtocolNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID1, header.IPv6ProtocolNumber, addr1, err)
- }
- if err := s.AddAddress(nicID2, header.IPv6ProtocolNumber, addr2); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID2, header.IPv6ProtocolNumber, addr2, err)
- }
- expectDADEvent(nicID2, addr2)
- if err := s.AddAddress(nicID3, header.IPv6ProtocolNumber, addr3); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID3, header.IPv6ProtocolNumber, addr3, err)
- }
- expectDADEvent(nicID3, addr3)
-
- // Address should not be considered bound to NIC(1) yet
- // (DAD ongoing).
- addr, err := s.GetMainNICAddress(nicID1, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID1, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID1, header.IPv6ProtocolNumber, addr, want)
- }
-
- // Should get the address on NIC(2) and NIC(3)
- // immediately since we should not have performed DAD on
- // it as the stack was configured to not do DAD by
- // default and we only updated the NDP configurations on
- // NIC(1).
- addr, err = s.GetMainNICAddress(nicID2, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID2, header.IPv6ProtocolNumber, err)
- }
- if addr.Address != addr2 {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = %s, want = %s", nicID2, header.IPv6ProtocolNumber, addr, addr2)
- }
- addr, err = s.GetMainNICAddress(nicID3, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID3, header.IPv6ProtocolNumber, err)
- }
- if addr.Address != addr3 {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = %s, want = %s", nicID3, header.IPv6ProtocolNumber, addr, addr3)
- }
-
- // Sleep until right (500ms before) before resolution to
- // make sure the address didn't resolve on NIC(1) yet.
- const delta = 500 * time.Millisecond
- time.Sleep(time.Duration(test.dupAddrDetectTransmits)*test.expectedRetransmitTimer - delta)
- addr, err = s.GetMainNICAddress(nicID1, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID1, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID1, header.IPv6ProtocolNumber, addr, want)
- }
-
- // Wait for DAD to resolve.
- select {
- case <-time.After(2 * delta):
- // We should get a resolution event after 500ms
- // (delta) since we wait for 500ms less than the
- // expected resolution time above to make sure
- // that the address did not yet resolve. Waiting
- // for 1s (2x delta) without a resolution event
- // means something is wrong.
- t.Fatal("timed out waiting for DAD resolution")
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID1, addr1, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- }
- addr, err = s.GetMainNICAddress(nicID1, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID1, header.IPv6ProtocolNumber, err)
- }
- if addr.Address != addr1 {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = %s, want = %s", nicID1, header.IPv6ProtocolNumber, addr, addr1)
- }
- })
- }
-}
-
-// raBufWithOptsAndDHCPv6 returns a valid NDP Router Advertisement with options
-// and DHCPv6 configurations specified.
-func raBufWithOptsAndDHCPv6(ip tcpip.Address, rl uint16, managedAddress, otherConfigurations bool, optSer header.NDPOptionsSerializer) *stack.PacketBuffer {
- icmpSize := header.ICMPv6HeaderSize + header.NDPRAMinimumSize + int(optSer.Length())
- hdr := buffer.NewPrependable(header.IPv6MinimumSize + icmpSize)
- pkt := header.ICMPv6(hdr.Prepend(icmpSize))
- pkt.SetType(header.ICMPv6RouterAdvert)
- pkt.SetCode(0)
- raPayload := pkt.NDPPayload()
- ra := header.NDPRouterAdvert(raPayload)
- // Populate the Router Lifetime.
- binary.BigEndian.PutUint16(raPayload[2:], rl)
- // Populate the Managed Address flag field.
- if managedAddress {
- // The Managed Addresses flag field is the 7th bit of byte #1 (0-indexing)
- // of the RA payload.
- raPayload[1] |= (1 << 7)
- }
- // Populate the Other Configurations flag field.
- if otherConfigurations {
- // The Other Configurations flag field is the 6th bit of byte #1
- // (0-indexing) of the RA payload.
- raPayload[1] |= (1 << 6)
- }
- opts := ra.Options()
- opts.Serialize(optSer)
- pkt.SetChecksum(header.ICMPv6Checksum(pkt, ip, header.IPv6AllNodesMulticastAddress, buffer.VectorisedView{}))
- payloadLength := hdr.UsedLength()
- iph := header.IPv6(hdr.Prepend(header.IPv6MinimumSize))
- iph.Encode(&header.IPv6Fields{
- PayloadLength: uint16(payloadLength),
- NextHeader: uint8(icmp.ProtocolNumber6),
- HopLimit: header.NDPHopLimit,
- SrcAddr: ip,
- DstAddr: header.IPv6AllNodesMulticastAddress,
- })
-
- return stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: hdr.View().ToVectorisedView(),
- })
-}
-
-// raBufWithOpts returns a valid NDP Router Advertisement with options.
-//
-// Note, raBufWithOpts does not populate any of the RA fields other than the
-// Router Lifetime.
-func raBufWithOpts(ip tcpip.Address, rl uint16, optSer header.NDPOptionsSerializer) *stack.PacketBuffer {
- return raBufWithOptsAndDHCPv6(ip, rl, false, false, optSer)
-}
-
-// raBufWithDHCPv6 returns a valid NDP Router Advertisement with DHCPv6 related
-// fields set.
-//
-// Note, raBufWithDHCPv6 does not populate any of the RA fields other than the
-// DHCPv6 related ones.
-func raBufWithDHCPv6(ip tcpip.Address, managedAddresses, otherConfiguratiosns bool) *stack.PacketBuffer {
- return raBufWithOptsAndDHCPv6(ip, 0, managedAddresses, otherConfiguratiosns, header.NDPOptionsSerializer{})
-}
-
-// raBuf returns a valid NDP Router Advertisement.
-//
-// Note, raBuf does not populate any of the RA fields other than the
-// Router Lifetime.
-func raBuf(ip tcpip.Address, rl uint16) *stack.PacketBuffer {
- return raBufWithOpts(ip, rl, header.NDPOptionsSerializer{})
-}
-
-// raBufWithPI returns a valid NDP Router Advertisement with a single Prefix
-// Information option.
-//
-// Note, raBufWithPI does not populate any of the RA fields other than the
-// Router Lifetime.
-func raBufWithPI(ip tcpip.Address, rl uint16, prefix tcpip.AddressWithPrefix, onLink, auto bool, vl, pl uint32) *stack.PacketBuffer {
- flags := uint8(0)
- if onLink {
- // The OnLink flag is the 7th bit in the flags byte.
- flags |= 1 << 7
- }
- if auto {
- // The Address Auto-Configuration flag is the 6th bit in the
- // flags byte.
- flags |= 1 << 6
- }
-
- // A valid header.NDPPrefixInformation must be 30 bytes.
- buf := [30]byte{}
- // The first byte in a header.NDPPrefixInformation is the Prefix Length
- // field.
- buf[0] = uint8(prefix.PrefixLen)
- // The 2nd byte within a header.NDPPrefixInformation is the Flags field.
- buf[1] = flags
- // The Valid Lifetime field starts after the 2nd byte within a
- // header.NDPPrefixInformation.
- binary.BigEndian.PutUint32(buf[2:], vl)
- // The Preferred Lifetime field starts after the 6th byte within a
- // header.NDPPrefixInformation.
- binary.BigEndian.PutUint32(buf[6:], pl)
- // The Prefix Address field starts after the 14th byte within a
- // header.NDPPrefixInformation.
- copy(buf[14:], prefix.Address)
- return raBufWithOpts(ip, rl, header.NDPOptionsSerializer{
- header.NDPPrefixInformation(buf[:]),
- })
-}
-
-// TestNoRouterDiscovery tests that router discovery will not be performed if
-// configured not to.
-func TestNoRouterDiscovery(t *testing.T) {
- // Being configured to discover routers means handle and
- // discover are set to true and forwarding is set to false.
- // This tests all possible combinations of the configurations,
- // except for the configuration where handle = true, discover =
- // true and forwarding = false (the required configuration to do
- // router discovery) - that will done in other tests.
- for i := 0; i < 7; i++ {
- handle := i&1 != 0
- discover := i&2 != 0
- forwarding := i&4 == 0
-
- t.Run(fmt.Sprintf("HandleRAs(%t), DiscoverDefaultRouters(%t), Forwarding(%t)", handle, discover, forwarding), func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- routerC: make(chan ndpRouterEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: handle,
- DiscoverDefaultRouters: discover,
- },
- NDPDisp: &ndpDisp,
- })
- s.SetForwarding(forwarding)
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Rx an RA with non-zero lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 1000))
- select {
- case <-ndpDisp.routerC:
- t.Fatal("unexpectedly discovered a router when configured not to")
- default:
- }
- })
- }
-}
-
-// Check e to make sure that the event is for addr on nic with ID 1, and the
-// discovered flag set to discovered.
-func checkRouterEvent(e ndpRouterEvent, addr tcpip.Address, discovered bool) string {
- return cmp.Diff(ndpRouterEvent{nicID: 1, addr: addr, discovered: discovered}, e, cmp.AllowUnexported(e))
-}
-
-// TestRouterDiscoveryDispatcherNoRemember tests that the stack does not
-// remember a discovered router when the dispatcher asks it not to.
-func TestRouterDiscoveryDispatcherNoRemember(t *testing.T) {
- ndpDisp := ndpDispatcher{
- routerC: make(chan ndpRouterEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverDefaultRouters: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Receive an RA for a router we should not remember.
- const lifetimeSeconds = 1
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, lifetimeSeconds))
- select {
- case e := <-ndpDisp.routerC:
- if diff := checkRouterEvent(e, llAddr2, true); diff != "" {
- t.Errorf("router event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected router discovery event")
- }
-
- // Wait for the invalidation time plus some buffer to make sure we do
- // not actually receive any invalidation events as we should not have
- // remembered the router in the first place.
- select {
- case <-ndpDisp.routerC:
- t.Fatal("should not have received any router events")
- case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout):
- }
-}
-
-func TestRouterDiscovery(t *testing.T) {
- ndpDisp := ndpDispatcher{
- routerC: make(chan ndpRouterEvent, 1),
- rememberRouter: true,
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverDefaultRouters: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- expectRouterEvent := func(addr tcpip.Address, discovered bool) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.routerC:
- if diff := checkRouterEvent(e, addr, discovered); diff != "" {
- t.Errorf("router event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected router discovery event")
- }
- }
-
- expectAsyncRouterInvalidationEvent := func(addr tcpip.Address, timeout time.Duration) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.routerC:
- if diff := checkRouterEvent(e, addr, false); diff != "" {
- t.Errorf("router event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(timeout):
- t.Fatal("timed out waiting for router discovery event")
- }
- }
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Rx an RA from lladdr2 with zero lifetime. It should not be
- // remembered.
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 0))
- select {
- case <-ndpDisp.routerC:
- t.Fatal("unexpectedly discovered a router with 0 lifetime")
- default:
- }
-
- // Rx an RA from lladdr2 with a huge lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 1000))
- expectRouterEvent(llAddr2, true)
-
- // Rx an RA from another router (lladdr3) with non-zero lifetime.
- const l3LifetimeSeconds = 6
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr3, l3LifetimeSeconds))
- expectRouterEvent(llAddr3, true)
-
- // Rx an RA from lladdr2 with lesser lifetime.
- const l2LifetimeSeconds = 2
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, l2LifetimeSeconds))
- select {
- case <-ndpDisp.routerC:
- t.Fatal("Should not receive a router event when updating lifetimes for known routers")
- default:
- }
-
- // Wait for lladdr2's router invalidation job to execute. The lifetime
- // of the router should have been updated to the most recent (smaller)
- // lifetime.
- //
- // Wait for the normal lifetime plus an extra bit for the
- // router to get invalidated. If we don't get an invalidation
- // event after this time, then something is wrong.
- expectAsyncRouterInvalidationEvent(llAddr2, l2LifetimeSeconds*time.Second+defaultAsyncPositiveEventTimeout)
-
- // Rx an RA from lladdr2 with huge lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 1000))
- expectRouterEvent(llAddr2, true)
-
- // Rx an RA from lladdr2 with zero lifetime. It should be invalidated.
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr2, 0))
- expectRouterEvent(llAddr2, false)
-
- // Wait for lladdr3's router invalidation job to execute. The lifetime
- // of the router should have been updated to the most recent (smaller)
- // lifetime.
- //
- // Wait for the normal lifetime plus an extra bit for the
- // router to get invalidated. If we don't get an invalidation
- // event after this time, then something is wrong.
- expectAsyncRouterInvalidationEvent(llAddr3, l3LifetimeSeconds*time.Second+defaultAsyncPositiveEventTimeout)
-}
-
-// TestRouterDiscoveryMaxRouters tests that only
-// stack.MaxDiscoveredDefaultRouters discovered routers are remembered.
-func TestRouterDiscoveryMaxRouters(t *testing.T) {
- ndpDisp := ndpDispatcher{
- routerC: make(chan ndpRouterEvent, 1),
- rememberRouter: true,
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverDefaultRouters: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Receive an RA from 2 more than the max number of discovered routers.
- for i := 1; i <= stack.MaxDiscoveredDefaultRouters+2; i++ {
- linkAddr := []byte{2, 2, 3, 4, 5, 0}
- linkAddr[5] = byte(i)
- llAddr := header.LinkLocalAddr(tcpip.LinkAddress(linkAddr))
-
- e.InjectInbound(header.IPv6ProtocolNumber, raBuf(llAddr, 5))
-
- if i <= stack.MaxDiscoveredDefaultRouters {
- select {
- case e := <-ndpDisp.routerC:
- if diff := checkRouterEvent(e, llAddr, true); diff != "" {
- t.Errorf("router event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected router discovery event")
- }
-
- } else {
- select {
- case <-ndpDisp.routerC:
- t.Fatal("should not have discovered a new router after we already discovered the max number of routers")
- default:
- }
- }
- }
-}
-
-// TestNoPrefixDiscovery tests that prefix discovery will not be performed if
-// configured not to.
-func TestNoPrefixDiscovery(t *testing.T) {
- prefix := tcpip.AddressWithPrefix{
- Address: tcpip.Address("\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x00"),
- PrefixLen: 64,
- }
-
- // Being configured to discover prefixes means handle and
- // discover are set to true and forwarding is set to false.
- // This tests all possible combinations of the configurations,
- // except for the configuration where handle = true, discover =
- // true and forwarding = false (the required configuration to do
- // prefix discovery) - that will done in other tests.
- for i := 0; i < 7; i++ {
- handle := i&1 != 0
- discover := i&2 != 0
- forwarding := i&4 == 0
-
- t.Run(fmt.Sprintf("HandleRAs(%t), DiscoverOnLinkPrefixes(%t), Forwarding(%t)", handle, discover, forwarding), func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- prefixC: make(chan ndpPrefixEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: handle,
- DiscoverOnLinkPrefixes: discover,
- },
- NDPDisp: &ndpDisp,
- })
- s.SetForwarding(forwarding)
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Rx an RA with prefix with non-zero lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, 10, 0))
-
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("unexpectedly discovered a prefix when configured not to")
- default:
- }
- })
- }
-}
-
-// Check e to make sure that the event is for prefix on nic with ID 1, and the
-// discovered flag set to discovered.
-func checkPrefixEvent(e ndpPrefixEvent, prefix tcpip.Subnet, discovered bool) string {
- return cmp.Diff(ndpPrefixEvent{nicID: 1, prefix: prefix, discovered: discovered}, e, cmp.AllowUnexported(e))
-}
-
-// TestPrefixDiscoveryDispatcherNoRemember tests that the stack does not
-// remember a discovered on-link prefix when the dispatcher asks it not to.
-func TestPrefixDiscoveryDispatcherNoRemember(t *testing.T) {
- prefix, subnet, _ := prefixSubnetAddr(0, "")
-
- ndpDisp := ndpDispatcher{
- prefixC: make(chan ndpPrefixEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverDefaultRouters: false,
- DiscoverOnLinkPrefixes: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Receive an RA with prefix that we should not remember.
- const lifetimeSeconds = 1
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, lifetimeSeconds, 0))
- select {
- case e := <-ndpDisp.prefixC:
- if diff := checkPrefixEvent(e, subnet, true); diff != "" {
- t.Errorf("prefix event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected prefix discovery event")
- }
-
- // Wait for the invalidation time plus some buffer to make sure we do
- // not actually receive any invalidation events as we should not have
- // remembered the prefix in the first place.
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("should not have received any prefix events")
- case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout):
- }
-}
-
-func TestPrefixDiscovery(t *testing.T) {
- prefix1, subnet1, _ := prefixSubnetAddr(0, "")
- prefix2, subnet2, _ := prefixSubnetAddr(1, "")
- prefix3, subnet3, _ := prefixSubnetAddr(2, "")
-
- ndpDisp := ndpDispatcher{
- prefixC: make(chan ndpPrefixEvent, 1),
- rememberPrefix: true,
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverOnLinkPrefixes: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- expectPrefixEvent := func(prefix tcpip.Subnet, discovered bool) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.prefixC:
- if diff := checkPrefixEvent(e, prefix, discovered); diff != "" {
- t.Errorf("prefix event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected prefix discovery event")
- }
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with zero valid lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, false, 0, 0))
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("unexpectedly discovered a prefix with 0 lifetime")
- default:
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with non-zero lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, false, 100, 0))
- expectPrefixEvent(subnet1, true)
-
- // Receive an RA with prefix2 in a PI.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, false, 100, 0))
- expectPrefixEvent(subnet2, true)
-
- // Receive an RA with prefix3 in a PI.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix3, true, false, 100, 0))
- expectPrefixEvent(subnet3, true)
-
- // Receive an RA with prefix1 in a PI with lifetime = 0.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, false, 0, 0))
- expectPrefixEvent(subnet1, false)
-
- // Receive an RA with prefix2 in a PI with lesser lifetime.
- lifetime := uint32(2)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, false, lifetime, 0))
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("unexpectedly received prefix event when updating lifetime")
- default:
- }
-
- // Wait for prefix2's most recent invalidation job plus some buffer to
- // expire.
- select {
- case e := <-ndpDisp.prefixC:
- if diff := checkPrefixEvent(e, subnet2, false); diff != "" {
- t.Errorf("prefix event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(time.Duration(lifetime)*time.Second + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for prefix discovery event")
- }
-
- // Receive RA to invalidate prefix3.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix3, true, false, 0, 0))
- expectPrefixEvent(subnet3, false)
-}
-
-func TestPrefixDiscoveryWithInfiniteLifetime(t *testing.T) {
- // Update the infinite lifetime value to a smaller value so we can test
- // that when we receive a PI with such a lifetime value, we do not
- // invalidate the prefix.
- const testInfiniteLifetimeSeconds = 2
- const testInfiniteLifetime = testInfiniteLifetimeSeconds * time.Second
- saved := header.NDPInfiniteLifetime
- header.NDPInfiniteLifetime = testInfiniteLifetime
- defer func() {
- header.NDPInfiniteLifetime = saved
- }()
-
- prefix := tcpip.AddressWithPrefix{
- Address: tcpip.Address("\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x00"),
- PrefixLen: 64,
- }
- subnet := prefix.Subnet()
-
- ndpDisp := ndpDispatcher{
- prefixC: make(chan ndpPrefixEvent, 1),
- rememberPrefix: true,
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverOnLinkPrefixes: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- expectPrefixEvent := func(prefix tcpip.Subnet, discovered bool) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.prefixC:
- if diff := checkPrefixEvent(e, prefix, discovered); diff != "" {
- t.Errorf("prefix event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected prefix discovery event")
- }
- }
-
- // Receive an RA with prefix in an NDP Prefix Information option (PI)
- // with infinite valid lifetime which should not get invalidated.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds, 0))
- expectPrefixEvent(subnet, true)
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("unexpectedly invalidated a prefix with infinite lifetime")
- case <-time.After(testInfiniteLifetime + defaultAsyncNegativeEventTimeout):
- }
-
- // Receive an RA with finite lifetime.
- // The prefix should get invalidated after 1s.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds-1, 0))
- select {
- case e := <-ndpDisp.prefixC:
- if diff := checkPrefixEvent(e, subnet, false); diff != "" {
- t.Errorf("prefix event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(testInfiniteLifetime):
- t.Fatal("timed out waiting for prefix discovery event")
- }
-
- // Receive an RA with finite lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds-1, 0))
- expectPrefixEvent(subnet, true)
-
- // Receive an RA with prefix with an infinite lifetime.
- // The prefix should not be invalidated.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds, 0))
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("unexpectedly invalidated a prefix with infinite lifetime")
- case <-time.After(testInfiniteLifetime + defaultAsyncNegativeEventTimeout):
- }
-
- // Receive an RA with a prefix with a lifetime value greater than the
- // set infinite lifetime value.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, testInfiniteLifetimeSeconds+1, 0))
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("unexpectedly invalidated a prefix with infinite lifetime")
- case <-time.After((testInfiniteLifetimeSeconds+1)*time.Second + defaultAsyncNegativeEventTimeout):
- }
-
- // Receive an RA with 0 lifetime.
- // The prefix should get invalidated.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, false, 0, 0))
- expectPrefixEvent(subnet, false)
-}
-
-// TestPrefixDiscoveryMaxRouters tests that only
-// stack.MaxDiscoveredOnLinkPrefixes discovered on-link prefixes are remembered.
-func TestPrefixDiscoveryMaxOnLinkPrefixes(t *testing.T) {
- ndpDisp := ndpDispatcher{
- prefixC: make(chan ndpPrefixEvent, stack.MaxDiscoveredOnLinkPrefixes+3),
- rememberPrefix: true,
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverDefaultRouters: false,
- DiscoverOnLinkPrefixes: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- optSer := make(header.NDPOptionsSerializer, stack.MaxDiscoveredOnLinkPrefixes+2)
- prefixes := [stack.MaxDiscoveredOnLinkPrefixes + 2]tcpip.Subnet{}
-
- // Receive an RA with 2 more than the max number of discovered on-link
- // prefixes.
- for i := 0; i < stack.MaxDiscoveredOnLinkPrefixes+2; i++ {
- prefixAddr := [16]byte{1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0}
- prefixAddr[7] = byte(i)
- prefix := tcpip.AddressWithPrefix{
- Address: tcpip.Address(prefixAddr[:]),
- PrefixLen: 64,
- }
- prefixes[i] = prefix.Subnet()
- buf := [30]byte{}
- buf[0] = uint8(prefix.PrefixLen)
- buf[1] = 128
- binary.BigEndian.PutUint32(buf[2:], 10)
- copy(buf[14:], prefix.Address)
-
- optSer[i] = header.NDPPrefixInformation(buf[:])
- }
-
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithOpts(llAddr1, 0, optSer))
- for i := 0; i < stack.MaxDiscoveredOnLinkPrefixes+2; i++ {
- if i < stack.MaxDiscoveredOnLinkPrefixes {
- select {
- case e := <-ndpDisp.prefixC:
- if diff := checkPrefixEvent(e, prefixes[i], true); diff != "" {
- t.Errorf("prefix event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected prefix discovery event")
- }
- } else {
- select {
- case <-ndpDisp.prefixC:
- t.Fatal("should not have discovered a new prefix after we already discovered the max number of prefixes")
- default:
- }
- }
- }
-}
-
-// Checks to see if list contains an IPv6 address, item.
-func containsV6Addr(list []tcpip.ProtocolAddress, item tcpip.AddressWithPrefix) bool {
- protocolAddress := tcpip.ProtocolAddress{
- Protocol: header.IPv6ProtocolNumber,
- AddressWithPrefix: item,
- }
-
- return containsAddr(list, protocolAddress)
-}
-
-// TestNoAutoGenAddr tests that SLAAC is not performed when configured not to.
-func TestNoAutoGenAddr(t *testing.T) {
- prefix, _, _ := prefixSubnetAddr(0, "")
-
- // Being configured to auto-generate addresses means handle and
- // autogen are set to true and forwarding is set to false.
- // This tests all possible combinations of the configurations,
- // except for the configuration where handle = true, autogen =
- // true and forwarding = false (the required configuration to do
- // SLAAC) - that will done in other tests.
- for i := 0; i < 7; i++ {
- handle := i&1 != 0
- autogen := i&2 != 0
- forwarding := i&4 == 0
-
- t.Run(fmt.Sprintf("HandleRAs(%t), AutoGenAddr(%t), Forwarding(%t)", handle, autogen, forwarding), func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: handle,
- AutoGenGlobalAddresses: autogen,
- },
- NDPDisp: &ndpDisp,
- })
- s.SetForwarding(forwarding)
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Rx an RA with prefix with non-zero lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, false, true, 10, 0))
-
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly auto-generated an address when configured not to")
- default:
- }
- })
- }
-}
-
-// Check e to make sure that the event is for addr on nic with ID 1, and the
-// event type is set to eventType.
-func checkAutoGenAddrEvent(e ndpAutoGenAddrEvent, addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) string {
- return cmp.Diff(ndpAutoGenAddrEvent{nicID: 1, addr: addr, eventType: eventType}, e, cmp.AllowUnexported(e))
-}
-
-// TestAutoGenAddr tests that an address is properly generated and invalidated
-// when configured to do so.
-func TestAutoGenAddr(t *testing.T) {
- const newMinVL = 2
- newMinVLDuration := newMinVL * time.Second
- saved := stack.MinPrefixInformationValidLifetimeForUpdate
- defer func() {
- stack.MinPrefixInformationValidLifetimeForUpdate = saved
- }()
- stack.MinPrefixInformationValidLifetimeForUpdate = newMinVLDuration
-
- prefix1, _, addr1 := prefixSubnetAddr(0, linkAddr1)
- prefix2, _, addr2 := prefixSubnetAddr(1, linkAddr1)
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with zero valid lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 0, 0))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly auto-generated an address with 0 lifetime")
- default:
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with non-zero lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 0))
- expectAutoGenAddrEvent(addr1, newAddr)
- if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr1) {
- t.Fatalf("Should have %s in the list of addresses", addr1)
- }
-
- // Receive an RA with prefix2 in an NDP Prefix Information option (PI)
- // with preferred lifetime > valid lifetime
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 5, 6))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly auto-generated an address with preferred lifetime > valid lifetime")
- default:
- }
-
- // Receive an RA with prefix2 in a PI.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 0))
- expectAutoGenAddrEvent(addr2, newAddr)
- if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr1) {
- t.Fatalf("Should have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr2) {
- t.Fatalf("Should have %s in the list of addresses", addr2)
- }
-
- // Refresh valid lifetime for addr of prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, newMinVL, 0))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly auto-generated an address when we already have an address for a prefix")
- default:
- }
-
- // Wait for addr of prefix1 to be invalidated.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr1, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(newMinVLDuration + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- if containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr1) {
- t.Fatalf("Should not have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr2) {
- t.Fatalf("Should have %s in the list of addresses", addr2)
- }
-}
-
-func addressCheck(addrs []tcpip.ProtocolAddress, containList, notContainList []tcpip.AddressWithPrefix) string {
- ret := ""
- for _, c := range containList {
- if !containsV6Addr(addrs, c) {
- ret += fmt.Sprintf("should have %s in the list of addresses\n", c)
- }
- }
- for _, c := range notContainList {
- if containsV6Addr(addrs, c) {
- ret += fmt.Sprintf("should not have %s in the list of addresses\n", c)
- }
- }
- return ret
-}
-
-// TestAutoGenTempAddr tests that temporary SLAAC addresses are generated when
-// configured to do so as part of IPv6 Privacy Extensions.
-func TestAutoGenTempAddr(t *testing.T) {
- const (
- nicID = 1
- newMinVL = 5
- newMinVLDuration = newMinVL * time.Second
- )
-
- savedMinPrefixInformationValidLifetimeForUpdate := stack.MinPrefixInformationValidLifetimeForUpdate
- savedMaxDesync := stack.MaxDesyncFactor
- defer func() {
- stack.MinPrefixInformationValidLifetimeForUpdate = savedMinPrefixInformationValidLifetimeForUpdate
- stack.MaxDesyncFactor = savedMaxDesync
- }()
- stack.MinPrefixInformationValidLifetimeForUpdate = newMinVLDuration
- stack.MaxDesyncFactor = time.Nanosecond
-
- prefix1, _, addr1 := prefixSubnetAddr(0, linkAddr1)
- prefix2, _, addr2 := prefixSubnetAddr(1, linkAddr1)
-
- tests := []struct {
- name string
- dupAddrTransmits uint8
- retransmitTimer time.Duration
- }{
- {
- name: "DAD disabled",
- },
- {
- name: "DAD enabled",
- dupAddrTransmits: 1,
- retransmitTimer: time.Second,
- },
- }
-
- // This Run will not return until the parallel tests finish.
- //
- // We need this because we need to do some teardown work after the
- // parallel tests complete.
- //
- // See https://godoc.org/testing#hdr-Subtests_and_Sub_benchmarks for
- // more details.
- t.Run("group", func(t *testing.T) {
- for i, test := range tests {
- i := i
- test := test
-
- t.Run(test.name, func(t *testing.T) {
- t.Parallel()
-
- seed := []byte{uint8(i)}
- var tempIIDHistory [header.IIDSize]byte
- header.InitialTempIID(tempIIDHistory[:], seed, nicID)
- newTempAddr := func(stableAddr tcpip.Address) tcpip.AddressWithPrefix {
- return header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], stableAddr)
- }
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 2),
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: test.dupAddrTransmits,
- RetransmitTimer: test.retransmitTimer,
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenTempGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- TempIIDSeed: seed,
- })
-
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectAutoGenAddrEventAsync := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- }
-
- expectDADEventAsync := func(addr tcpip.Address) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(time.Duration(test.dupAddrTransmits)*test.retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD event")
- }
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with zero valid lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 0, 0))
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpectedly auto-generated an address with 0 lifetime; event = %+v", e)
- default:
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with non-zero valid lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 0))
- expectAutoGenAddrEvent(addr1, newAddr)
- expectDADEventAsync(addr1.Address)
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpectedly got an auto gen addr event = %+v", e)
- default:
- }
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr1}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with non-zero valid & preferred lifetimes.
- tempAddr1 := newTempAddr(addr1.Address)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 100))
- expectAutoGenAddrEvent(tempAddr1, newAddr)
- expectDADEventAsync(tempAddr1.Address)
- if mismatch := addressCheck(s.NICInfo()[1].ProtocolAddresses, []tcpip.AddressWithPrefix{addr1, tempAddr1}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Receive an RA with prefix2 in an NDP Prefix Information option (PI)
- // with preferred lifetime > valid lifetime
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 5, 6))
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpectedly auto-generated an address with preferred lifetime > valid lifetime; event = %+v", e)
- default:
- }
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr1, tempAddr1}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Receive an RA with prefix2 in a PI w/ non-zero valid and preferred
- // lifetimes.
- tempAddr2 := newTempAddr(addr2.Address)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 100))
- expectAutoGenAddrEvent(addr2, newAddr)
- expectDADEventAsync(addr2.Address)
- expectAutoGenAddrEventAsync(tempAddr2, newAddr)
- expectDADEventAsync(tempAddr2.Address)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr1, tempAddr1, addr2, tempAddr2}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Deprecate prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 0))
- expectAutoGenAddrEvent(addr1, deprecatedAddr)
- expectAutoGenAddrEvent(tempAddr1, deprecatedAddr)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr1, tempAddr1, addr2, tempAddr2}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Refresh lifetimes for prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 100))
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr1, tempAddr1, addr2, tempAddr2}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Reduce valid lifetime and deprecate addresses of prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, newMinVL, 0))
- expectAutoGenAddrEvent(addr1, deprecatedAddr)
- expectAutoGenAddrEvent(tempAddr1, deprecatedAddr)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr1, tempAddr1, addr2, tempAddr2}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Wait for addrs of prefix1 to be invalidated. They should be
- // invalidated at the same time.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- var nextAddr tcpip.AddressWithPrefix
- if e.addr == addr1 {
- if diff := checkAutoGenAddrEvent(e, addr1, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- nextAddr = tempAddr1
- } else {
- if diff := checkAutoGenAddrEvent(e, tempAddr1, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- nextAddr = addr1
- }
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, nextAddr, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- case <-time.After(newMinVLDuration + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr2, tempAddr2}, []tcpip.AddressWithPrefix{addr1, tempAddr1}); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Receive an RA with prefix2 in a PI w/ 0 lifetimes.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 0, 0))
- expectAutoGenAddrEvent(addr2, deprecatedAddr)
- expectAutoGenAddrEvent(tempAddr2, deprecatedAddr)
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Errorf("got unexpected auto gen addr event = %+v", e)
- default:
- }
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr2, tempAddr2}, []tcpip.AddressWithPrefix{addr1, tempAddr1}); mismatch != "" {
- t.Fatal(mismatch)
- }
- })
- }
- })
-}
-
-// TestNoAutoGenTempAddrForLinkLocal test that temporary SLAAC addresses are not
-// generated for auto generated link-local addresses.
-func TestNoAutoGenTempAddrForLinkLocal(t *testing.T) {
- const nicID = 1
-
- savedMaxDesyncFactor := stack.MaxDesyncFactor
- defer func() {
- stack.MaxDesyncFactor = savedMaxDesyncFactor
- }()
- stack.MaxDesyncFactor = time.Nanosecond
-
- tests := []struct {
- name string
- dupAddrTransmits uint8
- retransmitTimer time.Duration
- }{
- {
- name: "DAD disabled",
- },
- {
- name: "DAD enabled",
- dupAddrTransmits: 1,
- retransmitTimer: time.Second,
- },
- }
-
- // This Run will not return until the parallel tests finish.
- //
- // We need this because we need to do some teardown work after the
- // parallel tests complete.
- //
- // See https://godoc.org/testing#hdr-Subtests_and_Sub_benchmarks for
- // more details.
- t.Run("group", func(t *testing.T) {
- for _, test := range tests {
- test := test
-
- t.Run(test.name, func(t *testing.T) {
- t.Parallel()
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- AutoGenTempGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- AutoGenIPv6LinkLocal: true,
- })
-
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- // The stable link-local address should auto-generate and resolve DAD.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, tcpip.AddressWithPrefix{Address: llAddr1, PrefixLen: header.IIDOffsetInIPv6Address * 8}, newAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, llAddr1, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(time.Duration(test.dupAddrTransmits)*test.retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD event")
- }
-
- // No new addresses should be generated.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Errorf("got unxpected auto gen addr event = %+v", e)
- case <-time.After(defaultAsyncNegativeEventTimeout):
- }
- })
- }
- })
-}
-
-// TestNoAutoGenTempAddrWithoutStableAddr tests that a temporary SLAAC address
-// will not be generated until after DAD completes, even if a new Router
-// Advertisement is received to refresh lifetimes.
-func TestNoAutoGenTempAddrWithoutStableAddr(t *testing.T) {
- const (
- nicID = 1
- dadTransmits = 1
- retransmitTimer = 2 * time.Second
- )
-
- savedMaxDesyncFactor := stack.MaxDesyncFactor
- defer func() {
- stack.MaxDesyncFactor = savedMaxDesyncFactor
- }()
- stack.MaxDesyncFactor = 0
-
- prefix, _, addr := prefixSubnetAddr(0, linkAddr1)
- var tempIIDHistory [header.IIDSize]byte
- header.InitialTempIID(tempIIDHistory[:], nil, nicID)
- tempAddr := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], addr.Address)
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenTempGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- // Receive an RA to trigger SLAAC for prefix.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, newAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
-
- // DAD on the stable address for prefix has not yet completed. Receiving a new
- // RA that would refresh lifetimes should not generate a temporary SLAAC
- // address for the prefix.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpected auto gen addr event = %+v", e)
- default:
- }
-
- // Wait for DAD to complete for the stable address then expect the temporary
- // address to be generated.
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr.Address, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD event")
- }
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, tempAddr, newAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
-}
-
-// TestAutoGenTempAddrRegen tests that temporary SLAAC addresses are
-// regenerated.
-func TestAutoGenTempAddrRegen(t *testing.T) {
- const (
- nicID = 1
- regenAfter = 2 * time.Second
- newMinVL = 10
- newMinVLDuration = newMinVL * time.Second
- )
-
- savedMaxDesyncFactor := stack.MaxDesyncFactor
- savedMinMaxTempAddrPreferredLifetime := stack.MinMaxTempAddrPreferredLifetime
- savedMinMaxTempAddrValidLifetime := stack.MinMaxTempAddrValidLifetime
- defer func() {
- stack.MaxDesyncFactor = savedMaxDesyncFactor
- stack.MinMaxTempAddrPreferredLifetime = savedMinMaxTempAddrPreferredLifetime
- stack.MinMaxTempAddrValidLifetime = savedMinMaxTempAddrValidLifetime
- }()
- stack.MaxDesyncFactor = 0
- stack.MinMaxTempAddrPreferredLifetime = newMinVLDuration
- stack.MinMaxTempAddrValidLifetime = newMinVLDuration
-
- prefix, _, addr := prefixSubnetAddr(0, linkAddr1)
- var tempIIDHistory [header.IIDSize]byte
- header.InitialTempIID(tempIIDHistory[:], nil, nicID)
- tempAddr1 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], addr.Address)
- tempAddr2 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], addr.Address)
- tempAddr3 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], addr.Address)
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2),
- }
- e := channel.New(0, 1280, linkAddr1)
- ndpConfigs := stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenTempGlobalAddresses: true,
- RegenAdvanceDuration: newMinVLDuration - regenAfter,
- }
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: ndpConfigs,
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectAutoGenAddrEventAsync := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType, timeout time.Duration) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(timeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with non-zero valid & preferred lifetimes.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- expectAutoGenAddrEvent(addr, newAddr)
- expectAutoGenAddrEvent(tempAddr1, newAddr)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr, tempAddr1}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Wait for regeneration
- expectAutoGenAddrEventAsync(tempAddr2, newAddr, regenAfter+defaultAsyncPositiveEventTimeout)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr, tempAddr1, tempAddr2}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Wait for regeneration
- expectAutoGenAddrEventAsync(tempAddr3, newAddr, regenAfter+defaultAsyncPositiveEventTimeout)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr, tempAddr1, tempAddr2, tempAddr3}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Stop generating temporary addresses
- ndpConfigs.AutoGenTempGlobalAddresses = false
- if err := s.SetNDPConfigurations(nicID, ndpConfigs); err != nil {
- t.Fatalf("s.SetNDPConfigurations(%d, _): %s", nicID, err)
- }
-
- // Wait for all the temporary addresses to get invalidated.
- tempAddrs := []tcpip.AddressWithPrefix{tempAddr1, tempAddr2, tempAddr3}
- invalidateAfter := newMinVLDuration - 2*regenAfter
- for _, addr := range tempAddrs {
- // Wait for a deprecation then invalidation event, or just an invalidation
- // event. We need to cover both cases but cannot deterministically hit both
- // cases because the deprecation and invalidation jobs could execute in any
- // order.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, deprecatedAddr); diff == "" {
- // If we get a deprecation event first, we should get an invalidation
- // event almost immediately after.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- } else if diff := checkAutoGenAddrEvent(e, addr, invalidatedAddr); diff == "" {
- // If we get an invalidation event first, we shouldn't get a deprecation
- // event after.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpectedly got an auto-generated event = %+v", e)
- case <-time.After(defaultAsyncNegativeEventTimeout):
- }
- } else {
- t.Fatalf("got unexpected auto-generated event = %+v", e)
- }
- case <-time.After(invalidateAfter + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
-
- invalidateAfter = regenAfter
- }
- if mismatch := addressCheck(s.NICInfo()[1].ProtocolAddresses, []tcpip.AddressWithPrefix{addr}, tempAddrs); mismatch != "" {
- t.Fatal(mismatch)
- }
-}
-
-// TestAutoGenTempAddrRegenJobUpdates tests that a temporary address's
-// regeneration job gets updated when refreshing the address's lifetimes.
-func TestAutoGenTempAddrRegenJobUpdates(t *testing.T) {
- const (
- nicID = 1
- regenAfter = 2 * time.Second
- newMinVL = 10
- newMinVLDuration = newMinVL * time.Second
- )
-
- savedMaxDesyncFactor := stack.MaxDesyncFactor
- savedMinMaxTempAddrPreferredLifetime := stack.MinMaxTempAddrPreferredLifetime
- savedMinMaxTempAddrValidLifetime := stack.MinMaxTempAddrValidLifetime
- defer func() {
- stack.MaxDesyncFactor = savedMaxDesyncFactor
- stack.MinMaxTempAddrPreferredLifetime = savedMinMaxTempAddrPreferredLifetime
- stack.MinMaxTempAddrValidLifetime = savedMinMaxTempAddrValidLifetime
- }()
- stack.MaxDesyncFactor = 0
- stack.MinMaxTempAddrPreferredLifetime = newMinVLDuration
- stack.MinMaxTempAddrValidLifetime = newMinVLDuration
-
- prefix, _, addr := prefixSubnetAddr(0, linkAddr1)
- var tempIIDHistory [header.IIDSize]byte
- header.InitialTempIID(tempIIDHistory[:], nil, nicID)
- tempAddr1 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], addr.Address)
- tempAddr2 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], addr.Address)
- tempAddr3 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], addr.Address)
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2),
- }
- e := channel.New(0, 1280, linkAddr1)
- ndpConfigs := stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenTempGlobalAddresses: true,
- RegenAdvanceDuration: newMinVLDuration - regenAfter,
- }
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: ndpConfigs,
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectAutoGenAddrEventAsync := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType, timeout time.Duration) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(timeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- }
-
- // Receive an RA with prefix1 in an NDP Prefix Information option (PI)
- // with non-zero valid & preferred lifetimes.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- expectAutoGenAddrEvent(addr, newAddr)
- expectAutoGenAddrEvent(tempAddr1, newAddr)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, []tcpip.AddressWithPrefix{addr, tempAddr1}, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Deprecate the prefix.
- //
- // A new temporary address should be generated after the regeneration
- // time has passed since the prefix is deprecated.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 0))
- expectAutoGenAddrEvent(addr, deprecatedAddr)
- expectAutoGenAddrEvent(tempAddr1, deprecatedAddr)
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpected auto gen addr event = %+v", e)
- case <-time.After(regenAfter + defaultAsyncNegativeEventTimeout):
- }
-
- // Prefer the prefix again.
- //
- // A new temporary address should immediately be generated since the
- // regeneration time has already passed since the last address was generated
- // - this regeneration does not depend on a job.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- expectAutoGenAddrEvent(tempAddr2, newAddr)
-
- // Increase the maximum lifetimes for temporary addresses to large values
- // then refresh the lifetimes of the prefix.
- //
- // A new address should not be generated after the regeneration time that was
- // expected for the previous check. This is because the preferred lifetime for
- // the temporary addresses has increased, so it will take more time to
- // regenerate a new temporary address. Note, new addresses are only
- // regenerated after the preferred lifetime - the regenerate advance duration
- // as paased.
- ndpConfigs.MaxTempAddrValidLifetime = 100 * time.Second
- ndpConfigs.MaxTempAddrPreferredLifetime = 100 * time.Second
- if err := s.SetNDPConfigurations(nicID, ndpConfigs); err != nil {
- t.Fatalf("s.SetNDPConfigurations(%d, _): %s", nicID, err)
- }
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpected auto gen addr event = %+v", e)
- case <-time.After(regenAfter + defaultAsyncNegativeEventTimeout):
- }
-
- // Set the maximum lifetimes for temporary addresses such that on the next
- // RA, the regeneration job gets scheduled again.
- //
- // The maximum lifetime is the sum of the minimum lifetimes for temporary
- // addresses + the time that has already passed since the last address was
- // generated so that the regeneration job is needed to generate the next
- // address.
- newLifetimes := newMinVLDuration + regenAfter + defaultAsyncNegativeEventTimeout
- ndpConfigs.MaxTempAddrValidLifetime = newLifetimes
- ndpConfigs.MaxTempAddrPreferredLifetime = newLifetimes
- if err := s.SetNDPConfigurations(nicID, ndpConfigs); err != nil {
- t.Fatalf("s.SetNDPConfigurations(%d, _): %s", nicID, err)
- }
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- expectAutoGenAddrEventAsync(tempAddr3, newAddr, regenAfter+defaultAsyncPositiveEventTimeout)
-}
-
-// TestMixedSLAACAddrConflictRegen tests SLAAC address regeneration in response
-// to a mix of DAD conflicts and NIC-local conflicts.
-func TestMixedSLAACAddrConflictRegen(t *testing.T) {
- const (
- nicID = 1
- nicName = "nic"
- lifetimeSeconds = 9999
- // From stack.maxSLAACAddrLocalRegenAttempts
- maxSLAACAddrLocalRegenAttempts = 10
- // We use 2 more addreses than the maximum local regeneration attempts
- // because we want to also trigger regeneration in response to a DAD
- // conflicts for this test.
- maxAddrs = maxSLAACAddrLocalRegenAttempts + 2
- dupAddrTransmits = 1
- retransmitTimer = time.Second
- )
-
- var tempIIDHistoryWithModifiedEUI64 [header.IIDSize]byte
- header.InitialTempIID(tempIIDHistoryWithModifiedEUI64[:], nil, nicID)
-
- var tempIIDHistoryWithOpaqueIID [header.IIDSize]byte
- header.InitialTempIID(tempIIDHistoryWithOpaqueIID[:], nil, nicID)
-
- prefix, subnet, stableAddrWithModifiedEUI64 := prefixSubnetAddr(0, linkAddr1)
- var stableAddrsWithOpaqueIID [maxAddrs]tcpip.AddressWithPrefix
- var tempAddrsWithOpaqueIID [maxAddrs]tcpip.AddressWithPrefix
- var tempAddrsWithModifiedEUI64 [maxAddrs]tcpip.AddressWithPrefix
- addrBytes := []byte(subnet.ID())
- for i := 0; i < maxAddrs; i++ {
- stableAddrsWithOpaqueIID[i] = tcpip.AddressWithPrefix{
- Address: tcpip.Address(header.AppendOpaqueInterfaceIdentifier(addrBytes[:header.IIDOffsetInIPv6Address], subnet, nicName, uint8(i), nil)),
- PrefixLen: header.IIDOffsetInIPv6Address * 8,
- }
- // When generating temporary addresses, the resolved stable address for the
- // SLAAC prefix will be the first address stable address generated for the
- // prefix as we will not simulate address conflicts for the stable addresses
- // in tests involving temporary addresses. Address conflicts for stable
- // addresses will be done in their own tests.
- tempAddrsWithOpaqueIID[i] = header.GenerateTempIPv6SLAACAddr(tempIIDHistoryWithOpaqueIID[:], stableAddrsWithOpaqueIID[0].Address)
- tempAddrsWithModifiedEUI64[i] = header.GenerateTempIPv6SLAACAddr(tempIIDHistoryWithModifiedEUI64[:], stableAddrWithModifiedEUI64.Address)
- }
-
- tests := []struct {
- name string
- addrs []tcpip.AddressWithPrefix
- tempAddrs bool
- initialExpect tcpip.AddressWithPrefix
- nicNameFromID func(tcpip.NICID, string) string
- }{
- {
- name: "Stable addresses with opaque IIDs",
- addrs: stableAddrsWithOpaqueIID[:],
- nicNameFromID: func(tcpip.NICID, string) string {
- return nicName
- },
- },
- {
- name: "Temporary addresses with opaque IIDs",
- addrs: tempAddrsWithOpaqueIID[:],
- tempAddrs: true,
- initialExpect: stableAddrsWithOpaqueIID[0],
- nicNameFromID: func(tcpip.NICID, string) string {
- return nicName
- },
- },
- {
- name: "Temporary addresses with modified EUI64",
- addrs: tempAddrsWithModifiedEUI64[:],
- tempAddrs: true,
- initialExpect: stableAddrWithModifiedEUI64,
- },
- }
-
- for _, test := range tests {
- test := test
-
- t.Run(test.name, func(t *testing.T) {
- t.Parallel()
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2),
- }
- e := channel.New(0, 1280, linkAddr1)
- ndpConfigs := stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenTempGlobalAddresses: test.tempAddrs,
- AutoGenAddressConflictRetries: 1,
- }
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- TransportProtocols: []stack.TransportProtocol{udp.NewProtocol()},
- NDPConfigs: ndpConfigs,
- NDPDisp: &ndpDisp,
- OpaqueIIDOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: test.nicNameFromID,
- },
- })
-
- s.SetRouteTable([]tcpip.Route{{
- Destination: header.IPv6EmptySubnet,
- Gateway: llAddr2,
- NIC: nicID,
- }})
-
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- for j := 0; j < len(test.addrs)-1; j++ {
- // The NIC will not attempt to generate an address in response to a
- // NIC-local conflict after some maximum number of attempts. We skip
- // creating a conflict for the address that would be generated as part
- // of the last attempt so we can simulate a DAD conflict for this
- // address and restart the NIC-local generation process.
- if j == maxSLAACAddrLocalRegenAttempts-1 {
- continue
- }
-
- if err := s.AddAddress(nicID, ipv6.ProtocolNumber, test.addrs[j].Address); err != nil {
- t.Fatalf("s.AddAddress(%d, %d, %s): %s", nicID, ipv6.ProtocolNumber, test.addrs[j].Address, err)
- }
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectAutoGenAddrAsyncEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- }
-
- expectDADEventAsync := func(addr tcpip.Address) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(dupAddrTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD event")
- }
- }
-
- // Enable DAD.
- ndpDisp.dadC = make(chan ndpDADEvent, 2)
- ndpConfigs.DupAddrDetectTransmits = dupAddrTransmits
- ndpConfigs.RetransmitTimer = retransmitTimer
- if err := s.SetNDPConfigurations(nicID, ndpConfigs); err != nil {
- t.Fatalf("s.SetNDPConfigurations(%d, _): %s", nicID, err)
- }
-
- // Do SLAAC for prefix.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, lifetimeSeconds, lifetimeSeconds))
- if test.initialExpect != (tcpip.AddressWithPrefix{}) {
- expectAutoGenAddrEvent(test.initialExpect, newAddr)
- expectDADEventAsync(test.initialExpect.Address)
- }
-
- // The last local generation attempt should succeed, but we introduce a
- // DAD failure to restart the local generation process.
- addr := test.addrs[maxSLAACAddrLocalRegenAttempts-1]
- expectAutoGenAddrAsyncEvent(addr, newAddr)
- if err := s.DupTentativeAddrDetected(nicID, addr.Address); err != nil {
- t.Fatalf("s.DupTentativeAddrDetected(%d, %s): %s", nicID, addr.Address, err)
- }
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr.Address, false, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected DAD event")
- }
- expectAutoGenAddrEvent(addr, invalidatedAddr)
-
- // The last address generated should resolve DAD.
- addr = test.addrs[len(test.addrs)-1]
- expectAutoGenAddrAsyncEvent(addr, newAddr)
- expectDADEventAsync(addr.Address)
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpected auto gen addr event = %+v", e)
- default:
- }
- })
- }
-}
-
-// stackAndNdpDispatcherWithDefaultRoute returns an ndpDispatcher,
-// channel.Endpoint and stack.Stack.
-//
-// stack.Stack will have a default route through the router (llAddr3) installed
-// and a static link-address (linkAddr3) added to the link address cache for the
-// router.
-func stackAndNdpDispatcherWithDefaultRoute(t *testing.T, nicID tcpip.NICID, useNeighborCache bool) (*ndpDispatcher, *channel.Endpoint, *stack.Stack) {
- t.Helper()
- ndpDisp := &ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- TransportProtocols: []stack.TransportProtocol{udp.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: ndpDisp,
- UseNeighborCache: useNeighborCache,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- s.SetRouteTable([]tcpip.Route{{
- Destination: header.IPv6EmptySubnet,
- Gateway: llAddr3,
- NIC: nicID,
- }})
- if useNeighborCache {
- s.AddStaticNeighbor(nicID, llAddr3, linkAddr3)
- } else {
- s.AddLinkAddress(nicID, llAddr3, linkAddr3)
- }
- return ndpDisp, e, s
-}
-
-// addrForNewConnectionTo returns the local address used when creating a new
-// connection to addr.
-func addrForNewConnectionTo(t *testing.T, s *stack.Stack, addr tcpip.FullAddress) tcpip.Address {
- t.Helper()
-
- wq := waiter.Queue{}
- we, ch := waiter.NewChannelEntry(nil)
- wq.EventRegister(&we, waiter.EventIn)
- defer wq.EventUnregister(&we)
- defer close(ch)
- ep, err := s.NewEndpoint(header.UDPProtocolNumber, header.IPv6ProtocolNumber, &wq)
- if err != nil {
- t.Fatalf("s.NewEndpoint(%d, %d, _): %s", header.UDPProtocolNumber, header.IPv6ProtocolNumber, err)
- }
- defer ep.Close()
- if err := ep.SetSockOptBool(tcpip.V6OnlyOption, true); err != nil {
- t.Fatalf("SetSockOpt(tcpip.V6OnlyOption, true): %s", err)
- }
- if err := ep.Connect(addr); err != nil {
- t.Fatalf("ep.Connect(%+v): %s", addr, err)
- }
- got, err := ep.GetLocalAddress()
- if err != nil {
- t.Fatalf("ep.GetLocalAddress(): %s", err)
- }
- return got.Addr
-}
-
-// addrForNewConnection returns the local address used when creating a new
-// connection.
-func addrForNewConnection(t *testing.T, s *stack.Stack) tcpip.Address {
- t.Helper()
-
- return addrForNewConnectionTo(t, s, dstAddr)
-}
-
-// addrForNewConnectionWithAddr returns the local address used when creating a
-// new connection with a specific local address.
-func addrForNewConnectionWithAddr(t *testing.T, s *stack.Stack, addr tcpip.FullAddress) tcpip.Address {
- t.Helper()
-
- wq := waiter.Queue{}
- we, ch := waiter.NewChannelEntry(nil)
- wq.EventRegister(&we, waiter.EventIn)
- defer wq.EventUnregister(&we)
- defer close(ch)
- ep, err := s.NewEndpoint(header.UDPProtocolNumber, header.IPv6ProtocolNumber, &wq)
- if err != nil {
- t.Fatalf("s.NewEndpoint(%d, %d, _): %s", header.UDPProtocolNumber, header.IPv6ProtocolNumber, err)
- }
- defer ep.Close()
- if err := ep.SetSockOptBool(tcpip.V6OnlyOption, true); err != nil {
- t.Fatalf("SetSockOpt(tcpip.V6OnlyOption, true): %s", err)
- }
- if err := ep.Bind(addr); err != nil {
- t.Fatalf("ep.Bind(%+v): %s", addr, err)
- }
- if err := ep.Connect(dstAddr); err != nil {
- t.Fatalf("ep.Connect(%+v): %s", dstAddr, err)
- }
- got, err := ep.GetLocalAddress()
- if err != nil {
- t.Fatalf("ep.GetLocalAddress(): %s", err)
- }
- return got.Addr
-}
-
-// TestAutoGenAddrDeprecateFromPI tests deprecating a SLAAC address when
-// receiving a PI with 0 preferred lifetime.
-func TestAutoGenAddrDeprecateFromPI(t *testing.T) {
- stacks := []struct {
- name string
- useNeighborCache bool
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- },
- }
-
- for _, stackTyp := range stacks {
- t.Run(stackTyp.name, func(t *testing.T) {
- const nicID = 1
-
- prefix1, _, addr1 := prefixSubnetAddr(0, linkAddr1)
- prefix2, _, addr2 := prefixSubnetAddr(1, linkAddr1)
-
- ndpDisp, e, s := stackAndNdpDispatcherWithDefaultRoute(t, nicID, stackTyp.useNeighborCache)
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectPrimaryAddr := func(addr tcpip.AddressWithPrefix) {
- t.Helper()
-
- if got, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber); err != nil {
- t.Fatalf("s.GetMainNICAddress(%d, %d): %s", nicID, header.IPv6ProtocolNumber, err)
- } else if got != addr {
- t.Errorf("got s.GetMainNICAddress(%d, %d) = %s, want = %s", nicID, header.IPv6ProtocolNumber, got, addr)
- }
-
- if got := addrForNewConnection(t, s); got != addr.Address {
- t.Errorf("got addrForNewConnection = %s, want = %s", got, addr.Address)
- }
- }
-
- // Receive PI for prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 100))
- expectAutoGenAddrEvent(addr1, newAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should have %s in the list of addresses", addr1)
- }
- expectPrimaryAddr(addr1)
-
- // Deprecate addr for prefix1 immedaitely.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 0))
- expectAutoGenAddrEvent(addr1, deprecatedAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should have %s in the list of addresses", addr1)
- }
- // addr should still be the primary endpoint as there are no other addresses.
- expectPrimaryAddr(addr1)
-
- // Refresh lifetimes of addr generated from prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 100))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- default:
- }
- expectPrimaryAddr(addr1)
-
- // Receive PI for prefix2.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 100))
- expectAutoGenAddrEvent(addr2, newAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
- expectPrimaryAddr(addr2)
-
- // Deprecate addr for prefix2 immedaitely.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 0))
- expectAutoGenAddrEvent(addr2, deprecatedAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
- // addr1 should be the primary endpoint now since addr2 is deprecated but
- // addr1 is not.
- expectPrimaryAddr(addr1)
- // addr2 is deprecated but if explicitly requested, it should be used.
- fullAddr2 := tcpip.FullAddress{Addr: addr2.Address, NIC: nicID}
- if got := addrForNewConnectionWithAddr(t, s, fullAddr2); got != addr2.Address {
- t.Errorf("got addrForNewConnectionWithAddr(_, _, %+v) = %s, want = %s", fullAddr2, got, addr2.Address)
- }
-
- // Another PI w/ 0 preferred lifetime should not result in a deprecation
- // event.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 0))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- default:
- }
- expectPrimaryAddr(addr1)
- if got := addrForNewConnectionWithAddr(t, s, fullAddr2); got != addr2.Address {
- t.Errorf("got addrForNewConnectionWithAddr(_, _, %+v) = %s, want = %s", fullAddr2, got, addr2.Address)
- }
-
- // Refresh lifetimes of addr generated from prefix2.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 100))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- default:
- }
- expectPrimaryAddr(addr2)
- })
- }
-}
-
-// TestAutoGenAddrJobDeprecation tests that an address is properly deprecated
-// when its preferred lifetime expires.
-func TestAutoGenAddrJobDeprecation(t *testing.T) {
- const nicID = 1
- const newMinVL = 2
- newMinVLDuration := newMinVL * time.Second
-
- stacks := []struct {
- name string
- useNeighborCache bool
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- },
- }
-
- for _, stackTyp := range stacks {
- t.Run(stackTyp.name, func(t *testing.T) {
- saved := stack.MinPrefixInformationValidLifetimeForUpdate
- defer func() {
- stack.MinPrefixInformationValidLifetimeForUpdate = saved
- }()
- stack.MinPrefixInformationValidLifetimeForUpdate = newMinVLDuration
-
- prefix1, _, addr1 := prefixSubnetAddr(0, linkAddr1)
- prefix2, _, addr2 := prefixSubnetAddr(1, linkAddr1)
-
- ndpDisp, e, s := stackAndNdpDispatcherWithDefaultRoute(t, nicID, stackTyp.useNeighborCache)
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectAutoGenAddrEventAfter := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType, timeout time.Duration) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(timeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- }
-
- expectPrimaryAddr := func(addr tcpip.AddressWithPrefix) {
- t.Helper()
-
- if got, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber); err != nil {
- t.Fatalf("s.GetMainNICAddress(%d, %d): %s", nicID, header.IPv6ProtocolNumber, err)
- } else if got != addr {
- t.Errorf("got s.GetMainNICAddress(%d, %d) = %s, want = %s", nicID, header.IPv6ProtocolNumber, got, addr)
- }
-
- if got := addrForNewConnection(t, s); got != addr.Address {
- t.Errorf("got addrForNewConnection = %s, want = %s", got, addr.Address)
- }
- }
-
- // Receive PI for prefix2.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 100))
- expectAutoGenAddrEvent(addr2, newAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
- expectPrimaryAddr(addr2)
-
- // Receive a PI for prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, 100, 90))
- expectAutoGenAddrEvent(addr1, newAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
- expectPrimaryAddr(addr1)
-
- // Refresh lifetime for addr of prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, newMinVL, newMinVL-1))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- default:
- }
- expectPrimaryAddr(addr1)
-
- // Wait for addr of prefix1 to be deprecated.
- expectAutoGenAddrEventAfter(addr1, deprecatedAddr, newMinVLDuration-time.Second+defaultAsyncPositiveEventTimeout)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should not have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
- // addr2 should be the primary endpoint now since addr1 is deprecated but
- // addr2 is not.
- expectPrimaryAddr(addr2)
- // addr1 is deprecated but if explicitly requested, it should be used.
- fullAddr1 := tcpip.FullAddress{Addr: addr1.Address, NIC: nicID}
- if got := addrForNewConnectionWithAddr(t, s, fullAddr1); got != addr1.Address {
- t.Errorf("got addrForNewConnectionWithAddr(_, _, %+v) = %s, want = %s", fullAddr1, got, addr1.Address)
- }
-
- // Refresh valid lifetime for addr of prefix1, w/ 0 preferred lifetime to make
- // sure we do not get a deprecation event again.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, newMinVL, 0))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- default:
- }
- expectPrimaryAddr(addr2)
- if got := addrForNewConnectionWithAddr(t, s, fullAddr1); got != addr1.Address {
- t.Errorf("got addrForNewConnectionWithAddr(_, _, %+v) = %s, want = %s", fullAddr1, got, addr1.Address)
- }
-
- // Refresh lifetimes for addr of prefix1.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, newMinVL, newMinVL-1))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- default:
- }
- // addr1 is the primary endpoint again since it is non-deprecated now.
- expectPrimaryAddr(addr1)
-
- // Wait for addr of prefix1 to be deprecated.
- expectAutoGenAddrEventAfter(addr1, deprecatedAddr, newMinVLDuration-time.Second+defaultAsyncPositiveEventTimeout)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should not have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
- // addr2 should be the primary endpoint now since it is not deprecated.
- expectPrimaryAddr(addr2)
- if got := addrForNewConnectionWithAddr(t, s, fullAddr1); got != addr1.Address {
- t.Errorf("got addrForNewConnectionWithAddr(_, _, %+v) = %s, want = %s", fullAddr1, got, addr1.Address)
- }
-
- // Wait for addr of prefix1 to be invalidated.
- expectAutoGenAddrEventAfter(addr1, invalidatedAddr, time.Second+defaultAsyncPositiveEventTimeout)
- if containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should not have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
- expectPrimaryAddr(addr2)
-
- // Refresh both lifetimes for addr of prefix2 to the same value.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, newMinVL, newMinVL))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- default:
- }
-
- // Wait for a deprecation then invalidation events, or just an invalidation
- // event. We need to cover both cases but cannot deterministically hit both
- // cases because the deprecation and invalidation handlers could be handled in
- // either deprecation then invalidation, or invalidation then deprecation
- // (which should be cancelled by the invalidation handler).
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr2, deprecatedAddr); diff == "" {
- // If we get a deprecation event first, we should get an invalidation
- // event almost immediately after.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr2, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- } else if diff := checkAutoGenAddrEvent(e, addr2, invalidatedAddr); diff == "" {
- // If we get an invalidation event first, we should not get a deprecation
- // event after.
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto-generated event")
- case <-time.After(defaultAsyncNegativeEventTimeout):
- }
- } else {
- t.Fatalf("got unexpected auto-generated event")
- }
- case <-time.After(newMinVLDuration + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- if containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should not have %s in the list of addresses", addr1)
- }
- if containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should not have %s in the list of addresses", addr2)
- }
- // Should not have any primary endpoints.
- if got, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber); err != nil {
- t.Fatalf("s.GetMainNICAddress(%d, %d): %s", nicID, header.IPv6ProtocolNumber, err)
- } else if want := (tcpip.AddressWithPrefix{}); got != want {
- t.Errorf("got s.GetMainNICAddress(%d, %d) = %s, want = %s", nicID, header.IPv6ProtocolNumber, got, want)
- }
- wq := waiter.Queue{}
- we, ch := waiter.NewChannelEntry(nil)
- wq.EventRegister(&we, waiter.EventIn)
- defer wq.EventUnregister(&we)
- defer close(ch)
- ep, err := s.NewEndpoint(header.UDPProtocolNumber, header.IPv6ProtocolNumber, &wq)
- if err != nil {
- t.Fatalf("s.NewEndpoint(%d, %d, _): %s", header.UDPProtocolNumber, header.IPv6ProtocolNumber, err)
- }
- defer ep.Close()
- if err := ep.SetSockOptBool(tcpip.V6OnlyOption, true); err != nil {
- t.Fatalf("SetSockOpt(tcpip.V6OnlyOption, true): %s", err)
- }
-
- if err := ep.Connect(dstAddr); err != tcpip.ErrNoRoute {
- t.Errorf("got ep.Connect(%+v) = %s, want = %s", dstAddr, err, tcpip.ErrNoRoute)
- }
- })
- }
-}
-
-// Tests transitioning a SLAAC address's valid lifetime between finite and
-// infinite values.
-func TestAutoGenAddrFiniteToInfiniteToFiniteVL(t *testing.T) {
- const infiniteVLSeconds = 2
- const minVLSeconds = 1
- savedIL := header.NDPInfiniteLifetime
- savedMinVL := stack.MinPrefixInformationValidLifetimeForUpdate
- defer func() {
- stack.MinPrefixInformationValidLifetimeForUpdate = savedMinVL
- header.NDPInfiniteLifetime = savedIL
- }()
- stack.MinPrefixInformationValidLifetimeForUpdate = minVLSeconds * time.Second
- header.NDPInfiniteLifetime = infiniteVLSeconds * time.Second
-
- prefix, _, addr := prefixSubnetAddr(0, linkAddr1)
-
- tests := []struct {
- name string
- infiniteVL uint32
- }{
- {
- name: "EqualToInfiniteVL",
- infiniteVL: infiniteVLSeconds,
- },
- // Our implementation supports changing header.NDPInfiniteLifetime for tests
- // such that a packet can be received where the lifetime field has a value
- // greater than header.NDPInfiniteLifetime. Because of this, we test to make
- // sure that receiving a value greater than header.NDPInfiniteLifetime is
- // handled the same as when receiving a value equal to
- // header.NDPInfiniteLifetime.
- {
- name: "MoreThanInfiniteVL",
- infiniteVL: infiniteVLSeconds + 1,
- },
- }
-
- // This Run will not return until the parallel tests finish.
- //
- // We need this because we need to do some teardown work after the
- // parallel tests complete.
- //
- // See https://godoc.org/testing#hdr-Subtests_and_Sub_benchmarks for
- // more details.
- t.Run("group", func(t *testing.T) {
- for _, test := range tests {
- test := test
-
- t.Run(test.name, func(t *testing.T) {
- t.Parallel()
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Receive an RA with finite prefix.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, minVLSeconds, 0))
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, newAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
-
- default:
- t.Fatal("expected addr auto gen event")
- }
-
- // Receive an new RA with prefix with infinite VL.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, test.infiniteVL, 0))
-
- // Receive a new RA with prefix with finite VL.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, minVLSeconds, 0))
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
-
- case <-time.After(minVLSeconds*time.Second + defaultAsyncPositiveEventTimeout):
- t.Fatal("timeout waiting for addr auto gen event")
- }
- })
- }
- })
-}
-
-// TestAutoGenAddrValidLifetimeUpdates tests that the valid lifetime of an
-// auto-generated address only gets updated when required to, as specified in
-// RFC 4862 section 5.5.3.e.
-func TestAutoGenAddrValidLifetimeUpdates(t *testing.T) {
- const infiniteVL = 4294967295
- const newMinVL = 4
- saved := stack.MinPrefixInformationValidLifetimeForUpdate
- defer func() {
- stack.MinPrefixInformationValidLifetimeForUpdate = saved
- }()
- stack.MinPrefixInformationValidLifetimeForUpdate = newMinVL * time.Second
-
- prefix, _, addr := prefixSubnetAddr(0, linkAddr1)
-
- tests := []struct {
- name string
- ovl uint32
- nvl uint32
- evl uint32
- }{
- // Should update the VL to the minimum VL for updating if the
- // new VL is less than newMinVL but was originally greater than
- // it.
- {
- "LargeVLToVLLessThanMinVLForUpdate",
- 9999,
- 1,
- newMinVL,
- },
- {
- "LargeVLTo0",
- 9999,
- 0,
- newMinVL,
- },
- {
- "InfiniteVLToVLLessThanMinVLForUpdate",
- infiniteVL,
- 1,
- newMinVL,
- },
- {
- "InfiniteVLTo0",
- infiniteVL,
- 0,
- newMinVL,
- },
-
- // Should not update VL if original VL was less than newMinVL
- // and the new VL is also less than newMinVL.
- {
- "ShouldNotUpdateWhenBothOldAndNewAreLessThanMinVLForUpdate",
- newMinVL - 1,
- newMinVL - 3,
- newMinVL - 1,
- },
-
- // Should take the new VL if the new VL is greater than the
- // remaining time or is greater than newMinVL.
- {
- "MorethanMinVLToLesserButStillMoreThanMinVLForUpdate",
- newMinVL + 5,
- newMinVL + 3,
- newMinVL + 3,
- },
- {
- "SmallVLToGreaterVLButStillLessThanMinVLForUpdate",
- newMinVL - 3,
- newMinVL - 1,
- newMinVL - 1,
- },
- {
- "SmallVLToGreaterVLThatIsMoreThaMinVLForUpdate",
- newMinVL - 3,
- newMinVL + 1,
- newMinVL + 1,
- },
- }
-
- // This Run will not return until the parallel tests finish.
- //
- // We need this because we need to do some teardown work after the
- // parallel tests complete.
- //
- // See https://godoc.org/testing#hdr-Subtests_and_Sub_benchmarks for
- // more details.
- t.Run("group", func(t *testing.T) {
- for _, test := range tests {
- test := test
-
- t.Run(test.name, func(t *testing.T) {
- t.Parallel()
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 10),
- }
- e := channel.New(10, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Receive an RA with prefix with initial VL,
- // test.ovl.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, test.ovl, 0))
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, newAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
-
- // Receive an new RA with prefix with new VL,
- // test.nvl.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, test.nvl, 0))
-
- //
- // Validate that the VL for the address got set
- // to test.evl.
- //
-
- // The address should not be invalidated until the effective valid
- // lifetime has passed.
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly received an auto gen addr event")
- case <-time.After(time.Duration(test.evl)*time.Second - defaultAsyncNegativeEventTimeout):
- }
-
- // Wait for the invalidation event.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timeout waiting for addr auto gen event")
- }
- })
- }
- })
-}
-
-// TestAutoGenAddrRemoval tests that when auto-generated addresses are removed
-// by the user, its resources will be cleaned up and an invalidation event will
-// be sent to the integrator.
-func TestAutoGenAddrRemoval(t *testing.T) {
- prefix, _, addr := prefixSubnetAddr(0, linkAddr1)
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- // Receive a PI to auto-generate an address.
- const lifetimeSeconds = 1
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, lifetimeSeconds, 0))
- expectAutoGenAddrEvent(addr, newAddr)
-
- // Removing the address should result in an invalidation event
- // immediately.
- if err := s.RemoveAddress(1, addr.Address); err != nil {
- t.Fatalf("RemoveAddress(_, %s) = %s", addr.Address, err)
- }
- expectAutoGenAddrEvent(addr, invalidatedAddr)
-
- // Wait for the original valid lifetime to make sure the original job got
- // cancelled/cleaned up.
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly received an auto gen addr event")
- case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout):
- }
-}
-
-// TestAutoGenAddrAfterRemoval tests adding a SLAAC address that was previously
-// assigned to the NIC but is in the permanentExpired state.
-func TestAutoGenAddrAfterRemoval(t *testing.T) {
- const nicID = 1
-
- stacks := []struct {
- name string
- useNeighborCache bool
- }{
- {
- name: "linkAddrCache",
- useNeighborCache: false,
- },
- {
- name: "neighborCache",
- useNeighborCache: true,
- },
- }
-
- for _, stackTyp := range stacks {
- t.Run(stackTyp.name, func(t *testing.T) {
- prefix1, _, addr1 := prefixSubnetAddr(0, linkAddr1)
- prefix2, _, addr2 := prefixSubnetAddr(1, linkAddr1)
- ndpDisp, e, s := stackAndNdpDispatcherWithDefaultRoute(t, nicID, stackTyp.useNeighborCache)
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectPrimaryAddr := func(addr tcpip.AddressWithPrefix) {
- t.Helper()
-
- if got, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber); err != nil {
- t.Fatalf("s.GetMainNICAddress(%d, %d): %s", nicID, header.IPv6ProtocolNumber, err)
- } else if got != addr {
- t.Errorf("got s.GetMainNICAddress(%d, %d) = %s, want = %s", nicID, header.IPv6ProtocolNumber, got, addr)
- }
-
- if got := addrForNewConnection(t, s); got != addr.Address {
- t.Errorf("got addrForNewConnection = %s, want = %s", got, addr.Address)
- }
- }
-
- // Receive a PI to auto-generate addr1 with a large valid and preferred
- // lifetime.
- const largeLifetimeSeconds = 999
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, 0, prefix1, true, true, largeLifetimeSeconds, largeLifetimeSeconds))
- expectAutoGenAddrEvent(addr1, newAddr)
- expectPrimaryAddr(addr1)
-
- // Add addr2 as a static address.
- protoAddr2 := tcpip.ProtocolAddress{
- Protocol: header.IPv6ProtocolNumber,
- AddressWithPrefix: addr2,
- }
- if err := s.AddProtocolAddressWithOptions(nicID, protoAddr2, stack.FirstPrimaryEndpoint); err != nil {
- t.Fatalf("AddProtocolAddressWithOptions(%d, %+v, %d) = %s", nicID, protoAddr2, stack.FirstPrimaryEndpoint, err)
- }
- // addr2 should be more preferred now since it is at the front of the primary
- // list.
- expectPrimaryAddr(addr2)
-
- // Get a route using addr2 to increment its reference count then remove it
- // to leave it in the permanentExpired state.
- r, err := s.FindRoute(nicID, addr2.Address, addr3, header.IPv6ProtocolNumber, false)
- if err != nil {
- t.Fatalf("FindRoute(%d, %s, %s, %d, false): %s", nicID, addr2.Address, addr3, header.IPv6ProtocolNumber, err)
- }
- defer r.Release()
- if err := s.RemoveAddress(nicID, addr2.Address); err != nil {
- t.Fatalf("s.RemoveAddress(%d, %s): %s", nicID, addr2.Address, err)
- }
- // addr1 should be preferred again since addr2 is in the expired state.
- expectPrimaryAddr(addr1)
-
- // Receive a PI to auto-generate addr2 as valid and preferred.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, 0, prefix2, true, true, largeLifetimeSeconds, largeLifetimeSeconds))
- expectAutoGenAddrEvent(addr2, newAddr)
- // addr2 should be more preferred now that it is closer to the front of the
- // primary list and not deprecated.
- expectPrimaryAddr(addr2)
-
- // Removing the address should result in an invalidation event immediately.
- // It should still be in the permanentExpired state because r is still held.
- //
- // We remove addr2 here to make sure addr2 was marked as a SLAAC address
- // (it was previously marked as a static address).
- if err := s.RemoveAddress(1, addr2.Address); err != nil {
- t.Fatalf("RemoveAddress(_, %s) = %s", addr2.Address, err)
- }
- expectAutoGenAddrEvent(addr2, invalidatedAddr)
- // addr1 should be more preferred since addr2 is in the expired state.
- expectPrimaryAddr(addr1)
-
- // Receive a PI to auto-generate addr2 as valid and deprecated.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, 0, prefix2, true, true, largeLifetimeSeconds, 0))
- expectAutoGenAddrEvent(addr2, newAddr)
- // addr1 should still be more preferred since addr2 is deprecated, even though
- // it is closer to the front of the primary list.
- expectPrimaryAddr(addr1)
-
- // Receive a PI to refresh addr2's preferred lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, 0, prefix2, true, true, largeLifetimeSeconds, largeLifetimeSeconds))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly got an auto gen addr event")
- default:
- }
- // addr2 should be more preferred now that it is not deprecated.
- expectPrimaryAddr(addr2)
-
- if err := s.RemoveAddress(1, addr2.Address); err != nil {
- t.Fatalf("RemoveAddress(_, %s) = %s", addr2.Address, err)
- }
- expectAutoGenAddrEvent(addr2, invalidatedAddr)
- expectPrimaryAddr(addr1)
- })
- }
-}
-
-// TestAutoGenAddrStaticConflict tests that if SLAAC generates an address that
-// is already assigned to the NIC, the static address remains.
-func TestAutoGenAddrStaticConflict(t *testing.T) {
- prefix, _, addr := prefixSubnetAddr(0, linkAddr1)
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- // Add the address as a static address before SLAAC tries to add it.
- if err := s.AddProtocolAddress(1, tcpip.ProtocolAddress{Protocol: header.IPv6ProtocolNumber, AddressWithPrefix: addr}); err != nil {
- t.Fatalf("AddAddress(_, %d, %s) = %s", header.IPv6ProtocolNumber, addr.Address, err)
- }
- if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr) {
- t.Fatalf("Should have %s in the list of addresses", addr1)
- }
-
- // Receive a PI where the generated address will be the same as the one
- // that we already have assigned statically.
- const lifetimeSeconds = 1
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, lifetimeSeconds, 0))
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly received an auto gen addr event for an address we already have statically")
- default:
- }
- if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr) {
- t.Fatalf("Should have %s in the list of addresses", addr1)
- }
-
- // Should not get an invalidation event after the PI's invalidation
- // time.
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly received an auto gen addr event")
- case <-time.After(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout):
- }
- if !containsV6Addr(s.NICInfo()[1].ProtocolAddresses, addr) {
- t.Fatalf("Should have %s in the list of addresses", addr1)
- }
-}
-
-// TestAutoGenAddrWithOpaqueIID tests that SLAAC generated addresses will use
-// opaque interface identifiers when configured to do so.
-func TestAutoGenAddrWithOpaqueIID(t *testing.T) {
- const nicID = 1
- const nicName = "nic1"
- var secretKeyBuf [header.OpaqueIIDSecretKeyMinBytes]byte
- secretKey := secretKeyBuf[:]
- n, err := rand.Read(secretKey)
- if err != nil {
- t.Fatalf("rand.Read(_): %s", err)
- }
- if n != header.OpaqueIIDSecretKeyMinBytes {
- t.Fatalf("got rand.Read(_) = (%d, _), want = (%d, _)", n, header.OpaqueIIDSecretKeyMinBytes)
- }
-
- prefix1, subnet1, _ := prefixSubnetAddr(0, linkAddr1)
- prefix2, subnet2, _ := prefixSubnetAddr(1, linkAddr1)
- // addr1 and addr2 are the addresses that are expected to be generated when
- // stack.Stack is configured to generate opaque interface identifiers as
- // defined by RFC 7217.
- addrBytes := []byte(subnet1.ID())
- addr1 := tcpip.AddressWithPrefix{
- Address: tcpip.Address(header.AppendOpaqueInterfaceIdentifier(addrBytes[:header.IIDOffsetInIPv6Address], subnet1, nicName, 0, secretKey)),
- PrefixLen: 64,
- }
- addrBytes = []byte(subnet2.ID())
- addr2 := tcpip.AddressWithPrefix{
- Address: tcpip.Address(header.AppendOpaqueInterfaceIdentifier(addrBytes[:header.IIDOffsetInIPv6Address], subnet2, nicName, 0, secretKey)),
- PrefixLen: 64,
- }
-
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- OpaqueIIDOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: func(_ tcpip.NICID, nicName string) string {
- return nicName
- },
- SecretKey: secretKey,
- },
- })
- opts := stack.NICOptions{Name: nicName}
- if err := s.CreateNICWithOptions(nicID, e, opts); err != nil {
- t.Fatalf("CreateNICWithOptions(%d, _, %+v, _) = %s", nicID, opts, err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- // Receive an RA with prefix1 in a PI.
- const validLifetimeSecondPrefix1 = 1
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix1, true, true, validLifetimeSecondPrefix1, 0))
- expectAutoGenAddrEvent(addr1, newAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should have %s in the list of addresses", addr1)
- }
-
- // Receive an RA with prefix2 in a PI with a large valid lifetime.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix2, true, true, 100, 0))
- expectAutoGenAddrEvent(addr2, newAddr)
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
-
- // Wait for addr of prefix1 to be invalidated.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr1, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(validLifetimeSecondPrefix1*time.Second + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- if containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr1) {
- t.Fatalf("should not have %s in the list of addresses", addr1)
- }
- if !containsV6Addr(s.NICInfo()[nicID].ProtocolAddresses, addr2) {
- t.Fatalf("should have %s in the list of addresses", addr2)
- }
-}
-
-func TestAutoGenAddrInResponseToDADConflicts(t *testing.T) {
- const nicID = 1
- const nicName = "nic"
- const dadTransmits = 1
- const retransmitTimer = time.Second
- const maxMaxRetries = 3
- const lifetimeSeconds = 10
-
- // Needed for the temporary address sub test.
- savedMaxDesync := stack.MaxDesyncFactor
- defer func() {
- stack.MaxDesyncFactor = savedMaxDesync
- }()
- stack.MaxDesyncFactor = time.Nanosecond
-
- var secretKeyBuf [header.OpaqueIIDSecretKeyMinBytes]byte
- secretKey := secretKeyBuf[:]
- n, err := rand.Read(secretKey)
- if err != nil {
- t.Fatalf("rand.Read(_): %s", err)
- }
- if n != header.OpaqueIIDSecretKeyMinBytes {
- t.Fatalf("got rand.Read(_) = (%d, _), want = (%d, _)", n, header.OpaqueIIDSecretKeyMinBytes)
- }
-
- prefix, subnet, _ := prefixSubnetAddr(0, linkAddr1)
-
- addrForSubnet := func(subnet tcpip.Subnet, dadCounter uint8) tcpip.AddressWithPrefix {
- addrBytes := []byte(subnet.ID())
- return tcpip.AddressWithPrefix{
- Address: tcpip.Address(header.AppendOpaqueInterfaceIdentifier(addrBytes[:header.IIDOffsetInIPv6Address], subnet, nicName, dadCounter, secretKey)),
- PrefixLen: 64,
- }
- }
-
- expectAutoGenAddrEvent := func(t *testing.T, ndpDisp *ndpDispatcher, addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- expectAutoGenAddrEventAsync := func(t *testing.T, ndpDisp *ndpDispatcher, addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for addr auto gen event")
- }
- }
-
- expectDADEvent := func(t *testing.T, ndpDisp *ndpDispatcher, addr tcpip.Address, resolved bool) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr, resolved, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected DAD event")
- }
- }
-
- expectDADEventAsync := func(t *testing.T, ndpDisp *ndpDispatcher, addr tcpip.Address, resolved bool) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr, resolved, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD event")
- }
- }
-
- stableAddrForTempAddrTest := addrForSubnet(subnet, 0)
-
- addrTypes := []struct {
- name string
- ndpConfigs stack.NDPConfigurations
- autoGenLinkLocal bool
- prepareFn func(t *testing.T, ndpDisp *ndpDispatcher, e *channel.Endpoint, tempIIDHistory []byte) []tcpip.AddressWithPrefix
- addrGenFn func(dadCounter uint8, tempIIDHistory []byte) tcpip.AddressWithPrefix
- }{
- {
- name: "Global address",
- ndpConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- },
- prepareFn: func(_ *testing.T, _ *ndpDispatcher, e *channel.Endpoint, _ []byte) []tcpip.AddressWithPrefix {
- // Receive an RA with prefix1 in a PI.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, lifetimeSeconds, lifetimeSeconds))
- return nil
-
- },
- addrGenFn: func(dadCounter uint8, _ []byte) tcpip.AddressWithPrefix {
- return addrForSubnet(subnet, dadCounter)
- },
- },
- {
- name: "LinkLocal address",
- ndpConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- },
- autoGenLinkLocal: true,
- prepareFn: func(*testing.T, *ndpDispatcher, *channel.Endpoint, []byte) []tcpip.AddressWithPrefix {
- return nil
- },
- addrGenFn: func(dadCounter uint8, _ []byte) tcpip.AddressWithPrefix {
- return addrForSubnet(header.IPv6LinkLocalPrefix.Subnet(), dadCounter)
- },
- },
- {
- name: "Temporary address",
- ndpConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenTempGlobalAddresses: true,
- },
- prepareFn: func(t *testing.T, ndpDisp *ndpDispatcher, e *channel.Endpoint, tempIIDHistory []byte) []tcpip.AddressWithPrefix {
- header.InitialTempIID(tempIIDHistory, nil, nicID)
-
- // Generate a stable SLAAC address so temporary addresses will be
- // generated.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, 100, 100))
- expectAutoGenAddrEvent(t, ndpDisp, stableAddrForTempAddrTest, newAddr)
- expectDADEventAsync(t, ndpDisp, stableAddrForTempAddrTest.Address, true)
-
- // The stable address will be assigned throughout the test.
- return []tcpip.AddressWithPrefix{stableAddrForTempAddrTest}
- },
- addrGenFn: func(_ uint8, tempIIDHistory []byte) tcpip.AddressWithPrefix {
- return header.GenerateTempIPv6SLAACAddr(tempIIDHistory, stableAddrForTempAddrTest.Address)
- },
- },
- }
-
- for _, addrType := range addrTypes {
- // This Run will not return until the parallel tests finish.
- //
- // We need this because we need to do some teardown work after the parallel
- // tests complete and limit the number of parallel tests running at the same
- // time to reduce flakes.
- //
- // See https://godoc.org/testing#hdr-Subtests_and_Sub_benchmarks for
- // more details.
- t.Run(addrType.name, func(t *testing.T) {
- for maxRetries := uint8(0); maxRetries <= maxMaxRetries; maxRetries++ {
- for numFailures := uint8(0); numFailures <= maxRetries+1; numFailures++ {
- maxRetries := maxRetries
- numFailures := numFailures
- addrType := addrType
-
- t.Run(fmt.Sprintf("%d max retries and %d failures", maxRetries, numFailures), func(t *testing.T) {
- t.Parallel()
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2),
- }
- e := channel.New(0, 1280, linkAddr1)
- ndpConfigs := addrType.ndpConfigs
- ndpConfigs.AutoGenAddressConflictRetries = maxRetries
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- AutoGenIPv6LinkLocal: addrType.autoGenLinkLocal,
- NDPConfigs: ndpConfigs,
- NDPDisp: &ndpDisp,
- OpaqueIIDOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: func(_ tcpip.NICID, nicName string) string {
- return nicName
- },
- SecretKey: secretKey,
- },
- })
- opts := stack.NICOptions{Name: nicName}
- if err := s.CreateNICWithOptions(nicID, e, opts); err != nil {
- t.Fatalf("CreateNICWithOptions(%d, _, %+v) = %s", nicID, opts, err)
- }
-
- var tempIIDHistory [header.IIDSize]byte
- stableAddrs := addrType.prepareFn(t, &ndpDisp, e, tempIIDHistory[:])
-
- // Simulate DAD conflicts so the address is regenerated.
- for i := uint8(0); i < numFailures; i++ {
- addr := addrType.addrGenFn(i, tempIIDHistory[:])
- expectAutoGenAddrEventAsync(t, &ndpDisp, addr, newAddr)
-
- // Should not have any new addresses assigned to the NIC.
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, stableAddrs, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // Simulate a DAD conflict.
- if err := s.DupTentativeAddrDetected(nicID, addr.Address); err != nil {
- t.Fatalf("s.DupTentativeAddrDetected(%d, %s): %s", nicID, addr.Address, err)
- }
- expectAutoGenAddrEvent(t, &ndpDisp, addr, invalidatedAddr)
- expectDADEvent(t, &ndpDisp, addr.Address, false)
-
- // Attempting to add the address manually should not fail if the
- // address's state was cleaned up when DAD failed.
- if err := s.AddAddress(nicID, header.IPv6ProtocolNumber, addr.Address); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID, header.IPv6ProtocolNumber, addr.Address, err)
- }
- if err := s.RemoveAddress(nicID, addr.Address); err != nil {
- t.Fatalf("RemoveAddress(%d, %s) = %s", nicID, addr.Address, err)
- }
- expectDADEvent(t, &ndpDisp, addr.Address, false)
- }
-
- // Should not have any new addresses assigned to the NIC.
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, stableAddrs, nil); mismatch != "" {
- t.Fatal(mismatch)
- }
-
- // If we had less failures than generation attempts, we should have
- // an address after DAD resolves.
- if maxRetries+1 > numFailures {
- addr := addrType.addrGenFn(numFailures, tempIIDHistory[:])
- expectAutoGenAddrEventAsync(t, &ndpDisp, addr, newAddr)
- expectDADEventAsync(t, &ndpDisp, addr.Address, true)
- if mismatch := addressCheck(s.NICInfo()[nicID].ProtocolAddresses, append(stableAddrs, addr), nil); mismatch != "" {
- t.Fatal(mismatch)
- }
- }
-
- // Should not attempt address generation again.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpectedly got an auto-generated address event = %+v", e)
- case <-time.After(defaultAsyncNegativeEventTimeout):
- }
- })
- }
- }
- })
- }
-}
-
-// TestAutoGenAddrWithEUI64IIDNoDADRetries tests that a regeneration attempt is
-// not made for SLAAC addresses generated with an IID based on the NIC's link
-// address.
-func TestAutoGenAddrWithEUI64IIDNoDADRetries(t *testing.T) {
- const nicID = 1
- const dadTransmits = 1
- const retransmitTimer = time.Second
- const maxRetries = 3
- const lifetimeSeconds = 10
-
- prefix, subnet, _ := prefixSubnetAddr(0, linkAddr1)
-
- addrTypes := []struct {
- name string
- ndpConfigs stack.NDPConfigurations
- autoGenLinkLocal bool
- subnet tcpip.Subnet
- triggerSLAACFn func(e *channel.Endpoint)
- }{
- {
- name: "Global address",
- ndpConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenAddressConflictRetries: maxRetries,
- },
- subnet: subnet,
- triggerSLAACFn: func(e *channel.Endpoint) {
- // Receive an RA with prefix1 in a PI.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, lifetimeSeconds, lifetimeSeconds))
-
- },
- },
- {
- name: "LinkLocal address",
- ndpConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- AutoGenAddressConflictRetries: maxRetries,
- },
- autoGenLinkLocal: true,
- subnet: header.IPv6LinkLocalPrefix.Subnet(),
- triggerSLAACFn: func(e *channel.Endpoint) {},
- },
- }
-
- for _, addrType := range addrTypes {
- addrType := addrType
-
- t.Run(addrType.name, func(t *testing.T) {
- t.Parallel()
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- AutoGenIPv6LinkLocal: addrType.autoGenLinkLocal,
- NDPConfigs: addrType.ndpConfigs,
- NDPDisp: &ndpDisp,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- addrType.triggerSLAACFn(e)
-
- addrBytes := []byte(addrType.subnet.ID())
- header.EthernetAdddressToModifiedEUI64IntoBuf(linkAddr1, addrBytes[header.IIDOffsetInIPv6Address:])
- addr := tcpip.AddressWithPrefix{
- Address: tcpip.Address(addrBytes),
- PrefixLen: 64,
- }
- expectAutoGenAddrEvent(addr, newAddr)
-
- // Simulate a DAD conflict.
- if err := s.DupTentativeAddrDetected(nicID, addr.Address); err != nil {
- t.Fatalf("s.DupTentativeAddrDetected(%d, %s): %s", nicID, addr.Address, err)
- }
- expectAutoGenAddrEvent(addr, invalidatedAddr)
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr.Address, false, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected DAD event")
- }
-
- // Should not attempt address regeneration.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- t.Fatalf("unexpectedly got an auto-generated address event = %+v", e)
- case <-time.After(defaultAsyncNegativeEventTimeout):
- }
- })
- }
-}
-
-// TestAutoGenAddrContinuesLifetimesAfterRetry tests that retrying address
-// generation in response to DAD conflicts does not refresh the lifetimes.
-func TestAutoGenAddrContinuesLifetimesAfterRetry(t *testing.T) {
- const nicID = 1
- const nicName = "nic"
- const dadTransmits = 1
- const retransmitTimer = 2 * time.Second
- const failureTimer = time.Second
- const maxRetries = 1
- const lifetimeSeconds = 5
-
- var secretKeyBuf [header.OpaqueIIDSecretKeyMinBytes]byte
- secretKey := secretKeyBuf[:]
- n, err := rand.Read(secretKey)
- if err != nil {
- t.Fatalf("rand.Read(_): %s", err)
- }
- if n != header.OpaqueIIDSecretKeyMinBytes {
- t.Fatalf("got rand.Read(_) = (%d, _), want = (%d, _)", n, header.OpaqueIIDSecretKeyMinBytes)
- }
-
- prefix, subnet, _ := prefixSubnetAddr(0, linkAddr1)
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent, 1),
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 2),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenAddressConflictRetries: maxRetries,
- },
- NDPDisp: &ndpDisp,
- OpaqueIIDOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: func(_ tcpip.NICID, nicName string) string {
- return nicName
- },
- SecretKey: secretKey,
- },
- })
- opts := stack.NICOptions{Name: nicName}
- if err := s.CreateNICWithOptions(nicID, e, opts); err != nil {
- t.Fatalf("CreateNICWithOptions(%d, _, %+v) = %s", nicID, opts, err)
- }
-
- expectAutoGenAddrEvent := func(addr tcpip.AddressWithPrefix, eventType ndpAutoGenAddrEventType) {
- t.Helper()
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, eventType); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- }
-
- // Receive an RA with prefix in a PI.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr2, 0, prefix, true, true, lifetimeSeconds, lifetimeSeconds))
-
- addrBytes := []byte(subnet.ID())
- addr := tcpip.AddressWithPrefix{
- Address: tcpip.Address(header.AppendOpaqueInterfaceIdentifier(addrBytes[:header.IIDOffsetInIPv6Address], subnet, nicName, 0, secretKey)),
- PrefixLen: 64,
- }
- expectAutoGenAddrEvent(addr, newAddr)
-
- // Simulate a DAD conflict after some time has passed.
- time.Sleep(failureTimer)
- if err := s.DupTentativeAddrDetected(nicID, addr.Address); err != nil {
- t.Fatalf("s.DupTentativeAddrDetected(%d, %s): %s", nicID, addr.Address, err)
- }
- expectAutoGenAddrEvent(addr, invalidatedAddr)
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr.Address, false, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected DAD event")
- }
-
- // Let the next address resolve.
- addr.Address = tcpip.Address(header.AppendOpaqueInterfaceIdentifier(addrBytes[:header.IIDOffsetInIPv6Address], subnet, nicName, 1, secretKey))
- expectAutoGenAddrEvent(addr, newAddr)
- select {
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr.Address, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD event")
- }
-
- // Address should be deprecated/invalidated after the lifetime expires.
- //
- // Note, the remaining lifetime is calculated from when the PI was first
- // processed. Since we wait for some time before simulating a DAD conflict
- // and more time for the new address to resolve, the new address is only
- // expected to be valid for the remaining time. The DAD conflict should
- // not have reset the lifetimes.
- //
- // We expect either just the invalidation event or the deprecation event
- // followed by the invalidation event.
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if e.eventType == deprecatedAddr {
- if diff := checkAutoGenAddrEvent(e, addr, deprecatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
-
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, addr, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- case <-time.After(defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for invalidated auto gen addr event after deprecation")
- }
- } else {
- if diff := checkAutoGenAddrEvent(e, addr, invalidatedAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- }
- case <-time.After(lifetimeSeconds*time.Second - failureTimer - dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for auto gen addr event")
- }
-}
-
-// TestNDPRecursiveDNSServerDispatch tests that we properly dispatch an event
-// to the integrator when an RA is received with the NDP Recursive DNS Server
-// option with at least one valid address.
-func TestNDPRecursiveDNSServerDispatch(t *testing.T) {
- tests := []struct {
- name string
- opt header.NDPRecursiveDNSServer
- expected *ndpRDNSS
- }{
- {
- "Unspecified",
- header.NDPRecursiveDNSServer([]byte{
- 0, 0,
- 0, 0, 0, 2,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- }),
- nil,
- },
- {
- "Multicast",
- header.NDPRecursiveDNSServer([]byte{
- 0, 0,
- 0, 0, 0, 2,
- 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
- }),
- nil,
- },
- {
- "OptionTooSmall",
- header.NDPRecursiveDNSServer([]byte{
- 0, 0,
- 0, 0, 0, 2,
- 1, 2, 3, 4, 5, 6, 7, 8,
- }),
- nil,
- },
- {
- "0Addresses",
- header.NDPRecursiveDNSServer([]byte{
- 0, 0,
- 0, 0, 0, 2,
- }),
- nil,
- },
- {
- "Valid1Address",
- header.NDPRecursiveDNSServer([]byte{
- 0, 0,
- 0, 0, 0, 2,
- 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 1,
- }),
- &ndpRDNSS{
- []tcpip.Address{
- "\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x01",
- },
- 2 * time.Second,
- },
- },
- {
- "Valid2Addresses",
- header.NDPRecursiveDNSServer([]byte{
- 0, 0,
- 0, 0, 0, 1,
- 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 1,
- 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 2,
- }),
- &ndpRDNSS{
- []tcpip.Address{
- "\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x01",
- "\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x02",
- },
- time.Second,
- },
- },
- {
- "Valid3Addresses",
- header.NDPRecursiveDNSServer([]byte{
- 0, 0,
- 0, 0, 0, 0,
- 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 1,
- 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 2,
- 1, 2, 3, 4, 5, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 3,
- }),
- &ndpRDNSS{
- []tcpip.Address{
- "\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x01",
- "\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x02",
- "\x01\x02\x03\x04\x05\x06\x07\x08\x00\x00\x00\x00\x00\x00\x00\x03",
- },
- 0,
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- // We do not expect more than a single RDNSS
- // event at any time for this test.
- rdnssC: make(chan ndpRDNSSEvent, 1),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- },
- NDPDisp: &ndpDisp,
- })
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(1) = %s", err)
- }
-
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithOpts(llAddr1, 0, header.NDPOptionsSerializer{test.opt}))
-
- if test.expected != nil {
- select {
- case e := <-ndpDisp.rdnssC:
- if e.nicID != 1 {
- t.Errorf("got rdnss nicID = %d, want = 1", e.nicID)
- }
- if diff := cmp.Diff(e.rdnss.addrs, test.expected.addrs); diff != "" {
- t.Errorf("rdnss addrs mismatch (-want +got):\n%s", diff)
- }
- if e.rdnss.lifetime != test.expected.lifetime {
- t.Errorf("got rdnss lifetime = %s, want = %s", e.rdnss.lifetime, test.expected.lifetime)
- }
- default:
- t.Fatal("expected an RDNSS option event")
- }
- }
-
- // Should have no more RDNSS options.
- select {
- case e := <-ndpDisp.rdnssC:
- t.Fatalf("unexpectedly got a new RDNSS option event: %+v", e)
- default:
- }
- })
- }
-}
-
-// TestNDPDNSSearchListDispatch tests that the integrator is informed when an
-// NDP DNS Search List option is received with at least one domain name in the
-// search list.
-func TestNDPDNSSearchListDispatch(t *testing.T) {
- const nicID = 1
-
- ndpDisp := ndpDispatcher{
- dnsslC: make(chan ndpDNSSLEvent, 3),
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- },
- NDPDisp: &ndpDisp,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- optSer := header.NDPOptionsSerializer{
- header.NDPDNSSearchList([]byte{
- 0, 0,
- 0, 0, 0, 0,
- 2, 'h', 'i',
- 0,
- }),
- header.NDPDNSSearchList([]byte{
- 0, 0,
- 0, 0, 0, 1,
- 1, 'i',
- 0,
- 2, 'a', 'm',
- 2, 'm', 'e',
- 0,
- }),
- header.NDPDNSSearchList([]byte{
- 0, 0,
- 0, 0, 1, 0,
- 3, 'x', 'y', 'z',
- 0,
- 5, 'h', 'e', 'l', 'l', 'o',
- 5, 'w', 'o', 'r', 'l', 'd',
- 0,
- 4, 't', 'h', 'i', 's',
- 2, 'i', 's',
- 1, 'a',
- 4, 't', 'e', 's', 't',
- 0,
- }),
- }
- expected := []struct {
- domainNames []string
- lifetime time.Duration
- }{
- {
- domainNames: []string{
- "hi",
- },
- lifetime: 0,
- },
- {
- domainNames: []string{
- "i",
- "am.me",
- },
- lifetime: time.Second,
- },
- {
- domainNames: []string{
- "xyz",
- "hello.world",
- "this.is.a.test",
- },
- lifetime: 256 * time.Second,
- },
- }
-
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithOpts(llAddr1, 0, optSer))
-
- for i, expected := range expected {
- select {
- case dnssl := <-ndpDisp.dnsslC:
- if dnssl.nicID != nicID {
- t.Errorf("got %d-th dnssl nicID = %d, want = %d", i, dnssl.nicID, nicID)
- }
- if diff := cmp.Diff(dnssl.domainNames, expected.domainNames); diff != "" {
- t.Errorf("%d-th dnssl domain names mismatch (-want +got):\n%s", i, diff)
- }
- if dnssl.lifetime != expected.lifetime {
- t.Errorf("got %d-th dnssl lifetime = %s, want = %s", i, dnssl.lifetime, expected.lifetime)
- }
- default:
- t.Fatal("expected a DNSSL event")
- }
- }
-
- // Should have no more DNSSL options.
- select {
- case <-ndpDisp.dnsslC:
- t.Fatal("unexpectedly got a DNSSL event")
- default:
- }
-}
-
-// TestCleanupNDPState tests that all discovered routers and prefixes, and
-// auto-generated addresses are invalidated when a NIC becomes a router.
-func TestCleanupNDPState(t *testing.T) {
- const (
- lifetimeSeconds = 5
- maxRouterAndPrefixEvents = 4
- nicID1 = 1
- nicID2 = 2
- )
-
- prefix1, subnet1, e1Addr1 := prefixSubnetAddr(0, linkAddr1)
- prefix2, subnet2, e1Addr2 := prefixSubnetAddr(1, linkAddr1)
- e2Addr1 := addrForSubnet(subnet1, linkAddr2)
- e2Addr2 := addrForSubnet(subnet2, linkAddr2)
- llAddrWithPrefix1 := tcpip.AddressWithPrefix{
- Address: llAddr1,
- PrefixLen: 64,
- }
- llAddrWithPrefix2 := tcpip.AddressWithPrefix{
- Address: llAddr2,
- PrefixLen: 64,
- }
-
- tests := []struct {
- name string
- cleanupFn func(t *testing.T, s *stack.Stack)
- keepAutoGenLinkLocal bool
- maxAutoGenAddrEvents int
- skipFinalAddrCheck bool
- }{
- // A NIC should still keep its auto-generated link-local address when
- // becoming a router.
- {
- name: "Enable forwarding",
- cleanupFn: func(t *testing.T, s *stack.Stack) {
- t.Helper()
- s.SetForwarding(true)
- },
- keepAutoGenLinkLocal: true,
- maxAutoGenAddrEvents: 4,
- },
-
- // A NIC should cleanup all NDP state when it is disabled.
- {
- name: "Disable NIC",
- cleanupFn: func(t *testing.T, s *stack.Stack) {
- t.Helper()
-
- if err := s.DisableNIC(nicID1); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID1, err)
- }
- if err := s.DisableNIC(nicID2); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID2, err)
- }
- },
- keepAutoGenLinkLocal: false,
- maxAutoGenAddrEvents: 6,
- },
-
- // A NIC should cleanup all NDP state when it is removed.
- {
- name: "Remove NIC",
- cleanupFn: func(t *testing.T, s *stack.Stack) {
- t.Helper()
-
- if err := s.RemoveNIC(nicID1); err != nil {
- t.Fatalf("s.RemoveNIC(%d): %s", nicID1, err)
- }
- if err := s.RemoveNIC(nicID2); err != nil {
- t.Fatalf("s.RemoveNIC(%d): %s", nicID2, err)
- }
- },
- keepAutoGenLinkLocal: false,
- maxAutoGenAddrEvents: 6,
- // The NICs are removed so we can't check their addresses after calling
- // stopFn.
- skipFinalAddrCheck: true,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- routerC: make(chan ndpRouterEvent, maxRouterAndPrefixEvents),
- rememberRouter: true,
- prefixC: make(chan ndpPrefixEvent, maxRouterAndPrefixEvents),
- rememberPrefix: true,
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, test.maxAutoGenAddrEvents),
- }
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- AutoGenIPv6LinkLocal: true,
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- DiscoverDefaultRouters: true,
- DiscoverOnLinkPrefixes: true,
- AutoGenGlobalAddresses: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- expectRouterEvent := func() (bool, ndpRouterEvent) {
- select {
- case e := <-ndpDisp.routerC:
- return true, e
- default:
- }
-
- return false, ndpRouterEvent{}
- }
-
- expectPrefixEvent := func() (bool, ndpPrefixEvent) {
- select {
- case e := <-ndpDisp.prefixC:
- return true, e
- default:
- }
-
- return false, ndpPrefixEvent{}
- }
-
- expectAutoGenAddrEvent := func() (bool, ndpAutoGenAddrEvent) {
- select {
- case e := <-ndpDisp.autoGenAddrC:
- return true, e
- default:
- }
-
- return false, ndpAutoGenAddrEvent{}
- }
-
- e1 := channel.New(0, 1280, linkAddr1)
- if err := s.CreateNIC(nicID1, e1); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID1, err)
- }
- // We have other tests that make sure we receive the *correct* events
- // on normal discovery of routers/prefixes, and auto-generated
- // addresses. Here we just make sure we get an event and let other tests
- // handle the correctness check.
- expectAutoGenAddrEvent()
-
- e2 := channel.New(0, 1280, linkAddr2)
- if err := s.CreateNIC(nicID2, e2); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID2, err)
- }
- expectAutoGenAddrEvent()
-
- // Receive RAs on NIC(1) and NIC(2) from default routers (llAddr3 and
- // llAddr4) w/ PI (for prefix1 in RA from llAddr3 and prefix2 in RA from
- // llAddr4) to discover multiple routers and prefixes, and auto-gen
- // multiple addresses.
-
- e1.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, lifetimeSeconds, prefix1, true, true, lifetimeSeconds, lifetimeSeconds))
- if ok, _ := expectRouterEvent(); !ok {
- t.Errorf("expected router event for %s on NIC(%d)", llAddr3, nicID1)
- }
- if ok, _ := expectPrefixEvent(); !ok {
- t.Errorf("expected prefix event for %s on NIC(%d)", prefix1, nicID1)
- }
- if ok, _ := expectAutoGenAddrEvent(); !ok {
- t.Errorf("expected auto-gen addr event for %s on NIC(%d)", e1Addr1, nicID1)
- }
-
- e1.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr4, lifetimeSeconds, prefix2, true, true, lifetimeSeconds, lifetimeSeconds))
- if ok, _ := expectRouterEvent(); !ok {
- t.Errorf("expected router event for %s on NIC(%d)", llAddr4, nicID1)
- }
- if ok, _ := expectPrefixEvent(); !ok {
- t.Errorf("expected prefix event for %s on NIC(%d)", prefix2, nicID1)
- }
- if ok, _ := expectAutoGenAddrEvent(); !ok {
- t.Errorf("expected auto-gen addr event for %s on NIC(%d)", e1Addr2, nicID1)
- }
-
- e2.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, lifetimeSeconds, prefix1, true, true, lifetimeSeconds, lifetimeSeconds))
- if ok, _ := expectRouterEvent(); !ok {
- t.Errorf("expected router event for %s on NIC(%d)", llAddr3, nicID2)
- }
- if ok, _ := expectPrefixEvent(); !ok {
- t.Errorf("expected prefix event for %s on NIC(%d)", prefix1, nicID2)
- }
- if ok, _ := expectAutoGenAddrEvent(); !ok {
- t.Errorf("expected auto-gen addr event for %s on NIC(%d)", e1Addr2, nicID2)
- }
-
- e2.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr4, lifetimeSeconds, prefix2, true, true, lifetimeSeconds, lifetimeSeconds))
- if ok, _ := expectRouterEvent(); !ok {
- t.Errorf("expected router event for %s on NIC(%d)", llAddr4, nicID2)
- }
- if ok, _ := expectPrefixEvent(); !ok {
- t.Errorf("expected prefix event for %s on NIC(%d)", prefix2, nicID2)
- }
- if ok, _ := expectAutoGenAddrEvent(); !ok {
- t.Errorf("expected auto-gen addr event for %s on NIC(%d)", e2Addr2, nicID2)
- }
-
- // We should have the auto-generated addresses added.
- nicinfo := s.NICInfo()
- nic1Addrs := nicinfo[nicID1].ProtocolAddresses
- nic2Addrs := nicinfo[nicID2].ProtocolAddresses
- if !containsV6Addr(nic1Addrs, llAddrWithPrefix1) {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", llAddrWithPrefix1, nicID1, nic1Addrs)
- }
- if !containsV6Addr(nic1Addrs, e1Addr1) {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", e1Addr1, nicID1, nic1Addrs)
- }
- if !containsV6Addr(nic1Addrs, e1Addr2) {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", e1Addr2, nicID1, nic1Addrs)
- }
- if !containsV6Addr(nic2Addrs, llAddrWithPrefix2) {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", llAddrWithPrefix2, nicID2, nic2Addrs)
- }
- if !containsV6Addr(nic2Addrs, e2Addr1) {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", e2Addr1, nicID2, nic2Addrs)
- }
- if !containsV6Addr(nic2Addrs, e2Addr2) {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", e2Addr2, nicID2, nic2Addrs)
- }
-
- // We can't proceed any further if we already failed the test (missing
- // some discovery/auto-generated address events or addresses).
- if t.Failed() {
- t.FailNow()
- }
-
- test.cleanupFn(t, s)
-
- // Collect invalidation events after having NDP state cleaned up.
- gotRouterEvents := make(map[ndpRouterEvent]int)
- for i := 0; i < maxRouterAndPrefixEvents; i++ {
- ok, e := expectRouterEvent()
- if !ok {
- t.Errorf("expected %d router events after becoming a router; got = %d", maxRouterAndPrefixEvents, i)
- break
- }
- gotRouterEvents[e]++
- }
- gotPrefixEvents := make(map[ndpPrefixEvent]int)
- for i := 0; i < maxRouterAndPrefixEvents; i++ {
- ok, e := expectPrefixEvent()
- if !ok {
- t.Errorf("expected %d prefix events after becoming a router; got = %d", maxRouterAndPrefixEvents, i)
- break
- }
- gotPrefixEvents[e]++
- }
- gotAutoGenAddrEvents := make(map[ndpAutoGenAddrEvent]int)
- for i := 0; i < test.maxAutoGenAddrEvents; i++ {
- ok, e := expectAutoGenAddrEvent()
- if !ok {
- t.Errorf("expected %d auto-generated address events after becoming a router; got = %d", test.maxAutoGenAddrEvents, i)
- break
- }
- gotAutoGenAddrEvents[e]++
- }
-
- // No need to proceed any further if we already failed the test (missing
- // some invalidation events).
- if t.Failed() {
- t.FailNow()
- }
-
- expectedRouterEvents := map[ndpRouterEvent]int{
- {nicID: nicID1, addr: llAddr3, discovered: false}: 1,
- {nicID: nicID1, addr: llAddr4, discovered: false}: 1,
- {nicID: nicID2, addr: llAddr3, discovered: false}: 1,
- {nicID: nicID2, addr: llAddr4, discovered: false}: 1,
- }
- if diff := cmp.Diff(expectedRouterEvents, gotRouterEvents); diff != "" {
- t.Errorf("router events mismatch (-want +got):\n%s", diff)
- }
- expectedPrefixEvents := map[ndpPrefixEvent]int{
- {nicID: nicID1, prefix: subnet1, discovered: false}: 1,
- {nicID: nicID1, prefix: subnet2, discovered: false}: 1,
- {nicID: nicID2, prefix: subnet1, discovered: false}: 1,
- {nicID: nicID2, prefix: subnet2, discovered: false}: 1,
- }
- if diff := cmp.Diff(expectedPrefixEvents, gotPrefixEvents); diff != "" {
- t.Errorf("prefix events mismatch (-want +got):\n%s", diff)
- }
- expectedAutoGenAddrEvents := map[ndpAutoGenAddrEvent]int{
- {nicID: nicID1, addr: e1Addr1, eventType: invalidatedAddr}: 1,
- {nicID: nicID1, addr: e1Addr2, eventType: invalidatedAddr}: 1,
- {nicID: nicID2, addr: e2Addr1, eventType: invalidatedAddr}: 1,
- {nicID: nicID2, addr: e2Addr2, eventType: invalidatedAddr}: 1,
- }
-
- if !test.keepAutoGenLinkLocal {
- expectedAutoGenAddrEvents[ndpAutoGenAddrEvent{nicID: nicID1, addr: llAddrWithPrefix1, eventType: invalidatedAddr}] = 1
- expectedAutoGenAddrEvents[ndpAutoGenAddrEvent{nicID: nicID2, addr: llAddrWithPrefix2, eventType: invalidatedAddr}] = 1
- }
-
- if diff := cmp.Diff(expectedAutoGenAddrEvents, gotAutoGenAddrEvents); diff != "" {
- t.Errorf("auto-generated address events mismatch (-want +got):\n%s", diff)
- }
-
- if !test.skipFinalAddrCheck {
- // Make sure the auto-generated addresses got removed.
- nicinfo = s.NICInfo()
- nic1Addrs = nicinfo[nicID1].ProtocolAddresses
- nic2Addrs = nicinfo[nicID2].ProtocolAddresses
- if containsV6Addr(nic1Addrs, llAddrWithPrefix1) != test.keepAutoGenLinkLocal {
- if test.keepAutoGenLinkLocal {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", llAddrWithPrefix1, nicID1, nic1Addrs)
- } else {
- t.Errorf("still have %s in the list of addresses for NIC(%d): %+v", llAddrWithPrefix1, nicID1, nic1Addrs)
- }
- }
- if containsV6Addr(nic1Addrs, e1Addr1) {
- t.Errorf("still have %s in the list of addresses for NIC(%d): %+v", e1Addr1, nicID1, nic1Addrs)
- }
- if containsV6Addr(nic1Addrs, e1Addr2) {
- t.Errorf("still have %s in the list of addresses for NIC(%d): %+v", e1Addr2, nicID1, nic1Addrs)
- }
- if containsV6Addr(nic2Addrs, llAddrWithPrefix2) != test.keepAutoGenLinkLocal {
- if test.keepAutoGenLinkLocal {
- t.Errorf("missing %s from the list of addresses for NIC(%d): %+v", llAddrWithPrefix2, nicID2, nic2Addrs)
- } else {
- t.Errorf("still have %s in the list of addresses for NIC(%d): %+v", llAddrWithPrefix2, nicID2, nic2Addrs)
- }
- }
- if containsV6Addr(nic2Addrs, e2Addr1) {
- t.Errorf("still have %s in the list of addresses for NIC(%d): %+v", e2Addr1, nicID2, nic2Addrs)
- }
- if containsV6Addr(nic2Addrs, e2Addr2) {
- t.Errorf("still have %s in the list of addresses for NIC(%d): %+v", e2Addr2, nicID2, nic2Addrs)
- }
- }
-
- // Should not get any more events (invalidation timers should have been
- // cancelled when the NDP state was cleaned up).
- time.Sleep(lifetimeSeconds*time.Second + defaultAsyncNegativeEventTimeout)
- select {
- case <-ndpDisp.routerC:
- t.Error("unexpected router event")
- default:
- }
- select {
- case <-ndpDisp.prefixC:
- t.Error("unexpected prefix event")
- default:
- }
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Error("unexpected auto-generated address event")
- default:
- }
- })
- }
-}
-
-// TestDHCPv6ConfigurationFromNDPDA tests that the NDPDispatcher is properly
-// informed when new information about what configurations are available via
-// DHCPv6 is learned.
-func TestDHCPv6ConfigurationFromNDPDA(t *testing.T) {
- const nicID = 1
-
- ndpDisp := ndpDispatcher{
- dhcpv6ConfigurationC: make(chan ndpDHCPv6Event, 1),
- rememberRouter: true,
- }
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- },
- NDPDisp: &ndpDisp,
- })
-
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- expectDHCPv6Event := func(configuration stack.DHCPv6ConfigurationFromNDPRA) {
- t.Helper()
- select {
- case e := <-ndpDisp.dhcpv6ConfigurationC:
- if diff := cmp.Diff(ndpDHCPv6Event{nicID: nicID, configuration: configuration}, e, cmp.AllowUnexported(e)); diff != "" {
- t.Errorf("dhcpv6 event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected DHCPv6 configuration event")
- }
- }
-
- expectNoDHCPv6Event := func() {
- t.Helper()
- select {
- case <-ndpDisp.dhcpv6ConfigurationC:
- t.Fatal("unexpected DHCPv6 configuration event")
- default:
- }
- }
-
- // Even if the first RA reports no DHCPv6 configurations are available, the
- // dispatcher should get an event.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, false))
- expectDHCPv6Event(stack.DHCPv6NoConfiguration)
- // Receiving the same update again should not result in an event to the
- // dispatcher.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, false))
- expectNoDHCPv6Event()
-
- // Receive an RA that updates the DHCPv6 configuration to Other
- // Configurations.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, true))
- expectDHCPv6Event(stack.DHCPv6OtherConfigurations)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, true))
- expectNoDHCPv6Event()
-
- // Receive an RA that updates the DHCPv6 configuration to Managed Address.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, true, false))
- expectDHCPv6Event(stack.DHCPv6ManagedAddress)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, true, false))
- expectNoDHCPv6Event()
-
- // Receive an RA that updates the DHCPv6 configuration to none.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, false))
- expectDHCPv6Event(stack.DHCPv6NoConfiguration)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, false))
- expectNoDHCPv6Event()
-
- // Receive an RA that updates the DHCPv6 configuration to Managed Address.
- //
- // Note, when the M flag is set, the O flag is redundant.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, true, true))
- expectDHCPv6Event(stack.DHCPv6ManagedAddress)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, true, true))
- expectNoDHCPv6Event()
- // Even though the DHCPv6 flags are different, the effective configuration is
- // the same so we should not receive a new event.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, true, false))
- expectNoDHCPv6Event()
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, true, true))
- expectNoDHCPv6Event()
-
- // Receive an RA that updates the DHCPv6 configuration to Other
- // Configurations.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, true))
- expectDHCPv6Event(stack.DHCPv6OtherConfigurations)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, true))
- expectNoDHCPv6Event()
-
- // Cycling the NIC should cause the last DHCPv6 configuration to be cleared.
- if err := s.DisableNIC(nicID); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID, err)
- }
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
-
- // Receive an RA that updates the DHCPv6 configuration to Other
- // Configurations.
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, true))
- expectDHCPv6Event(stack.DHCPv6OtherConfigurations)
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithDHCPv6(llAddr2, false, true))
- expectNoDHCPv6Event()
-}
-
-// TestRouterSolicitation tests the initial Router Solicitations that are sent
-// when a NIC newly becomes enabled.
-func TestRouterSolicitation(t *testing.T) {
- const nicID = 1
-
- tests := []struct {
- name string
- linkHeaderLen uint16
- linkAddr tcpip.LinkAddress
- nicAddr tcpip.Address
- expectedSrcAddr tcpip.Address
- expectedNDPOpts []header.NDPOption
- maxRtrSolicit uint8
- rtrSolicitInt time.Duration
- effectiveRtrSolicitInt time.Duration
- maxRtrSolicitDelay time.Duration
- effectiveMaxRtrSolicitDelay time.Duration
- }{
- {
- name: "Single RS with 2s delay and interval",
- expectedSrcAddr: header.IPv6Any,
- maxRtrSolicit: 1,
- rtrSolicitInt: 2 * time.Second,
- effectiveRtrSolicitInt: 2 * time.Second,
- maxRtrSolicitDelay: 2 * time.Second,
- effectiveMaxRtrSolicitDelay: 2 * time.Second,
- },
- {
- name: "Single RS with 4s delay and interval",
- expectedSrcAddr: header.IPv6Any,
- maxRtrSolicit: 1,
- rtrSolicitInt: 4 * time.Second,
- effectiveRtrSolicitInt: 4 * time.Second,
- maxRtrSolicitDelay: 4 * time.Second,
- effectiveMaxRtrSolicitDelay: 4 * time.Second,
- },
- {
- name: "Two RS with delay",
- linkHeaderLen: 1,
- nicAddr: llAddr1,
- expectedSrcAddr: llAddr1,
- maxRtrSolicit: 2,
- rtrSolicitInt: 2 * time.Second,
- effectiveRtrSolicitInt: 2 * time.Second,
- maxRtrSolicitDelay: 500 * time.Millisecond,
- effectiveMaxRtrSolicitDelay: 500 * time.Millisecond,
- },
- {
- name: "Single RS without delay",
- linkHeaderLen: 2,
- linkAddr: linkAddr1,
- nicAddr: llAddr1,
- expectedSrcAddr: llAddr1,
- expectedNDPOpts: []header.NDPOption{
- header.NDPSourceLinkLayerAddressOption(linkAddr1),
- },
- maxRtrSolicit: 1,
- rtrSolicitInt: 2 * time.Second,
- effectiveRtrSolicitInt: 2 * time.Second,
- maxRtrSolicitDelay: 0,
- effectiveMaxRtrSolicitDelay: 0,
- },
- {
- name: "Two RS without delay and invalid zero interval",
- linkHeaderLen: 3,
- linkAddr: linkAddr1,
- expectedSrcAddr: header.IPv6Any,
- maxRtrSolicit: 2,
- rtrSolicitInt: 0,
- effectiveRtrSolicitInt: 4 * time.Second,
- maxRtrSolicitDelay: 0,
- effectiveMaxRtrSolicitDelay: 0,
- },
- {
- name: "Three RS without delay",
- linkAddr: linkAddr1,
- expectedSrcAddr: header.IPv6Any,
- maxRtrSolicit: 3,
- rtrSolicitInt: 500 * time.Millisecond,
- effectiveRtrSolicitInt: 500 * time.Millisecond,
- maxRtrSolicitDelay: 0,
- effectiveMaxRtrSolicitDelay: 0,
- },
- {
- name: "Two RS with invalid negative delay",
- linkAddr: linkAddr1,
- expectedSrcAddr: header.IPv6Any,
- maxRtrSolicit: 2,
- rtrSolicitInt: time.Second,
- effectiveRtrSolicitInt: time.Second,
- maxRtrSolicitDelay: -3 * time.Second,
- effectiveMaxRtrSolicitDelay: time.Second,
- },
- }
-
- // This Run will not return until the parallel tests finish.
- //
- // We need this because we need to do some teardown work after the
- // parallel tests complete.
- //
- // See https://godoc.org/testing#hdr-Subtests_and_Sub_benchmarks for
- // more details.
- t.Run("group", func(t *testing.T) {
- for _, test := range tests {
- test := test
-
- t.Run(test.name, func(t *testing.T) {
- t.Parallel()
-
- e := channelLinkWithHeaderLength{
- Endpoint: channel.New(int(test.maxRtrSolicit), 1280, test.linkAddr),
- headerLength: test.linkHeaderLen,
- }
- e.Endpoint.LinkEPCapabilities |= stack.CapabilityResolutionRequired
- waitForPkt := func(timeout time.Duration) {
- t.Helper()
- ctx, cancel := context.WithTimeout(context.Background(), timeout)
- defer cancel()
- p, ok := e.ReadContext(ctx)
- if !ok {
- t.Fatal("timed out waiting for packet")
- return
- }
-
- if p.Proto != header.IPv6ProtocolNumber {
- t.Fatalf("got Proto = %d, want = %d", p.Proto, header.IPv6ProtocolNumber)
- }
-
- // Make sure the right remote link address is used.
- if want := header.EthernetAddressFromMulticastIPv6Address(header.IPv6AllRoutersMulticastAddress); p.Route.RemoteLinkAddress != want {
- t.Errorf("got remote link address = %s, want = %s", p.Route.RemoteLinkAddress, want)
- }
-
- checker.IPv6(t, stack.PayloadSince(p.Pkt.NetworkHeader()),
- checker.SrcAddr(test.expectedSrcAddr),
- checker.DstAddr(header.IPv6AllRoutersMulticastAddress),
- checker.TTL(header.NDPHopLimit),
- checker.NDPRS(checker.NDPRSOptions(test.expectedNDPOpts)),
- )
-
- if l, want := p.Pkt.AvailableHeaderBytes(), int(test.linkHeaderLen); l != want {
- t.Errorf("got p.Pkt.AvailableHeaderBytes() = %d; want = %d", l, want)
- }
- }
- waitForNothing := func(timeout time.Duration) {
- t.Helper()
- ctx, cancel := context.WithTimeout(context.Background(), timeout)
- defer cancel()
- if _, ok := e.ReadContext(ctx); ok {
- t.Fatal("unexpectedly got a packet")
- }
- }
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- MaxRtrSolicitations: test.maxRtrSolicit,
- RtrSolicitationInterval: test.rtrSolicitInt,
- MaxRtrSolicitationDelay: test.maxRtrSolicitDelay,
- },
- })
- if err := s.CreateNIC(nicID, &e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- if addr := test.nicAddr; addr != "" {
- if err := s.AddAddress(nicID, header.IPv6ProtocolNumber, addr); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s) = %s", nicID, header.IPv6ProtocolNumber, addr, err)
- }
- }
-
- // Make sure each RS is sent at the right time.
- remaining := test.maxRtrSolicit
- if remaining > 0 {
- waitForPkt(test.effectiveMaxRtrSolicitDelay + defaultAsyncPositiveEventTimeout)
- remaining--
- }
-
- for ; remaining > 0; remaining-- {
- if test.effectiveRtrSolicitInt > defaultAsyncPositiveEventTimeout {
- waitForNothing(test.effectiveRtrSolicitInt - defaultAsyncNegativeEventTimeout)
- waitForPkt(defaultAsyncPositiveEventTimeout)
- } else {
- waitForPkt(test.effectiveRtrSolicitInt + defaultAsyncPositiveEventTimeout)
- }
- }
-
- // Make sure no more RS.
- if test.effectiveRtrSolicitInt > test.effectiveMaxRtrSolicitDelay {
- waitForNothing(test.effectiveRtrSolicitInt + defaultAsyncNegativeEventTimeout)
- } else {
- waitForNothing(test.effectiveMaxRtrSolicitDelay + defaultAsyncNegativeEventTimeout)
- }
-
- // Make sure the counter got properly
- // incremented.
- if got, want := s.Stats().ICMP.V6PacketsSent.RouterSolicit.Value(), uint64(test.maxRtrSolicit); got != want {
- t.Fatalf("got sent RouterSolicit = %d, want = %d", got, want)
- }
- })
- }
- })
-}
-
-func TestStopStartSolicitingRouters(t *testing.T) {
- const nicID = 1
- const delay = 0
- const interval = 500 * time.Millisecond
- const maxRtrSolicitations = 3
-
- tests := []struct {
- name string
- startFn func(t *testing.T, s *stack.Stack)
- // first is used to tell stopFn that it is being called for the first time
- // after router solicitations were last enabled.
- stopFn func(t *testing.T, s *stack.Stack, first bool)
- }{
- // Tests that when forwarding is enabled or disabled, router solicitations
- // are stopped or started, respectively.
- {
- name: "Enable and disable forwarding",
- startFn: func(t *testing.T, s *stack.Stack) {
- t.Helper()
- s.SetForwarding(false)
- },
- stopFn: func(t *testing.T, s *stack.Stack, _ bool) {
- t.Helper()
- s.SetForwarding(true)
- },
- },
-
- // Tests that when a NIC is enabled or disabled, router solicitations
- // are started or stopped, respectively.
- {
- name: "Enable and disable NIC",
- startFn: func(t *testing.T, s *stack.Stack) {
- t.Helper()
-
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
- },
- stopFn: func(t *testing.T, s *stack.Stack, _ bool) {
- t.Helper()
-
- if err := s.DisableNIC(nicID); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID, err)
- }
- },
- },
-
- // Tests that when a NIC is removed, router solicitations are stopped. We
- // cannot start router solications on a removed NIC.
- {
- name: "Remove NIC",
- stopFn: func(t *testing.T, s *stack.Stack, first bool) {
- t.Helper()
-
- // Only try to remove the NIC the first time stopFn is called since it's
- // impossible to remove an already removed NIC.
- if !first {
- return
- }
-
- if err := s.RemoveNIC(nicID); err != nil {
- t.Fatalf("s.RemoveNIC(%d): %s", nicID, err)
- }
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- e := channel.New(maxRtrSolicitations, 1280, linkAddr1)
- waitForPkt := func(timeout time.Duration) {
- t.Helper()
-
- ctx, cancel := context.WithTimeout(context.Background(), timeout)
- defer cancel()
- p, ok := e.ReadContext(ctx)
- if !ok {
- t.Fatal("timed out waiting for packet")
- }
-
- if p.Proto != header.IPv6ProtocolNumber {
- t.Fatalf("got Proto = %d, want = %d", p.Proto, header.IPv6ProtocolNumber)
- }
- checker.IPv6(t, stack.PayloadSince(p.Pkt.NetworkHeader()),
- checker.SrcAddr(header.IPv6Any),
- checker.DstAddr(header.IPv6AllRoutersMulticastAddress),
- checker.TTL(header.NDPHopLimit),
- checker.NDPRS())
- }
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- MaxRtrSolicitations: maxRtrSolicitations,
- RtrSolicitationInterval: interval,
- MaxRtrSolicitationDelay: delay,
- },
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- // Stop soliciting routers.
- test.stopFn(t, s, true /* first */)
- ctx, cancel := context.WithTimeout(context.Background(), delay+defaultAsyncNegativeEventTimeout)
- defer cancel()
- if _, ok := e.ReadContext(ctx); ok {
- // A single RS may have been sent before solicitations were stopped.
- ctx, cancel := context.WithTimeout(context.Background(), interval+defaultAsyncNegativeEventTimeout)
- defer cancel()
- if _, ok = e.ReadContext(ctx); ok {
- t.Fatal("should not have sent more than one RS message")
- }
- }
-
- // Stopping router solicitations after it has already been stopped should
- // do nothing.
- test.stopFn(t, s, false /* first */)
- ctx, cancel = context.WithTimeout(context.Background(), delay+defaultAsyncNegativeEventTimeout)
- defer cancel()
- if _, ok := e.ReadContext(ctx); ok {
- t.Fatal("unexpectedly got a packet after router solicitation has been stopepd")
- }
-
- // If test.startFn is nil, there is no way to restart router solications.
- if test.startFn == nil {
- return
- }
-
- // Start soliciting routers.
- test.startFn(t, s)
- waitForPkt(delay + defaultAsyncPositiveEventTimeout)
- waitForPkt(interval + defaultAsyncPositiveEventTimeout)
- waitForPkt(interval + defaultAsyncPositiveEventTimeout)
- ctx, cancel = context.WithTimeout(context.Background(), interval+defaultAsyncNegativeEventTimeout)
- defer cancel()
- if _, ok := e.ReadContext(ctx); ok {
- t.Fatal("unexpectedly got an extra packet after sending out the expected RSs")
- }
-
- // Starting router solicitations after it has already completed should do
- // nothing.
- test.startFn(t, s)
- ctx, cancel = context.WithTimeout(context.Background(), delay+defaultAsyncNegativeEventTimeout)
- defer cancel()
- if _, ok := e.ReadContext(ctx); ok {
- t.Fatal("unexpectedly got a packet after finishing router solicitations")
- }
- })
- }
-}
diff --git a/pkg/tcpip/stack/neighbor_cache_test.go b/pkg/tcpip/stack/neighbor_cache_test.go
deleted file mode 100644
index b4fa69e3e..000000000
--- a/pkg/tcpip/stack/neighbor_cache_test.go
+++ /dev/null
@@ -1,1726 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack
-
-import (
- "bytes"
- "encoding/binary"
- "fmt"
- "math"
- "math/rand"
- "strings"
- "sync"
- "sync/atomic"
- "testing"
- "time"
-
- "github.com/google/go-cmp/cmp"
- "github.com/google/go-cmp/cmp/cmpopts"
- "gvisor.dev/gvisor/pkg/sleep"
- "gvisor.dev/gvisor/pkg/tcpip"
-)
-
-const (
- // entryStoreSize is the default number of entries that will be generated and
- // added to the entry store. This number needs to be larger than the size of
- // the neighbor cache to give ample opportunity for verifying behavior during
- // cache overflows. Four times the size of the neighbor cache allows for
- // three complete cache overflows.
- entryStoreSize = 4 * neighborCacheSize
-
- // typicalLatency is the typical latency for an ARP or NDP packet to travel
- // to a router and back.
- typicalLatency = time.Millisecond
-
- // testEntryBroadcastAddr is a special address that indicates a packet should
- // be sent to all nodes.
- testEntryBroadcastAddr = tcpip.Address("broadcast")
-
- // testEntryLocalAddr is the source address of neighbor probes.
- testEntryLocalAddr = tcpip.Address("local_addr")
-
- // testEntryBroadcastLinkAddr is a special link address sent back to
- // multicast neighbor probes.
- testEntryBroadcastLinkAddr = tcpip.LinkAddress("mac_broadcast")
-
- // infiniteDuration indicates that a task will not occur in our lifetime.
- infiniteDuration = time.Duration(math.MaxInt64)
-)
-
-// entryDiffOpts returns the options passed to cmp.Diff to compare neighbor
-// entries. The UpdatedAt field is ignored due to a lack of a deterministic
-// method to predict the time that an event will be dispatched.
-func entryDiffOpts() []cmp.Option {
- return []cmp.Option{
- cmpopts.IgnoreFields(NeighborEntry{}, "UpdatedAt"),
- }
-}
-
-// entryDiffOptsWithSort is like entryDiffOpts but also includes an option to
-// sort slices of entries for cases where ordering must be ignored.
-func entryDiffOptsWithSort() []cmp.Option {
- return []cmp.Option{
- cmpopts.IgnoreFields(NeighborEntry{}, "UpdatedAt"),
- cmpopts.SortSlices(func(a, b NeighborEntry) bool {
- return strings.Compare(string(a.Addr), string(b.Addr)) < 0
- }),
- }
-}
-
-func newTestNeighborCache(nudDisp NUDDispatcher, config NUDConfigurations, clock tcpip.Clock) *neighborCache {
- config.resetInvalidFields()
- rng := rand.New(rand.NewSource(time.Now().UnixNano()))
- return &neighborCache{
- nic: &NIC{
- stack: &Stack{
- clock: clock,
- nudDisp: nudDisp,
- },
- id: 1,
- },
- state: NewNUDState(config, rng),
- cache: make(map[tcpip.Address]*neighborEntry, neighborCacheSize),
- }
-}
-
-// testEntryStore contains a set of IP to NeighborEntry mappings.
-type testEntryStore struct {
- mu sync.RWMutex
- entriesMap map[tcpip.Address]NeighborEntry
-}
-
-func toAddress(i int) tcpip.Address {
- buf := new(bytes.Buffer)
- binary.Write(buf, binary.BigEndian, uint8(1))
- binary.Write(buf, binary.BigEndian, uint8(0))
- binary.Write(buf, binary.BigEndian, uint16(i))
- return tcpip.Address(buf.String())
-}
-
-func toLinkAddress(i int) tcpip.LinkAddress {
- buf := new(bytes.Buffer)
- binary.Write(buf, binary.BigEndian, uint8(1))
- binary.Write(buf, binary.BigEndian, uint8(0))
- binary.Write(buf, binary.BigEndian, uint32(i))
- return tcpip.LinkAddress(buf.String())
-}
-
-// newTestEntryStore returns a testEntryStore pre-populated with entries.
-func newTestEntryStore() *testEntryStore {
- store := &testEntryStore{
- entriesMap: make(map[tcpip.Address]NeighborEntry),
- }
- for i := 0; i < entryStoreSize; i++ {
- addr := toAddress(i)
- linkAddr := toLinkAddress(i)
-
- store.entriesMap[addr] = NeighborEntry{
- Addr: addr,
- LocalAddr: testEntryLocalAddr,
- LinkAddr: linkAddr,
- }
- }
- return store
-}
-
-// size returns the number of entries in the store.
-func (s *testEntryStore) size() int {
- s.mu.RLock()
- defer s.mu.RUnlock()
- return len(s.entriesMap)
-}
-
-// entry returns the entry at index i. Returns an empty entry and false if i is
-// out of bounds.
-func (s *testEntryStore) entry(i int) (NeighborEntry, bool) {
- return s.entryByAddr(toAddress(i))
-}
-
-// entryByAddr returns the entry matching addr for situations when the index is
-// not available. Returns an empty entry and false if no entries match addr.
-func (s *testEntryStore) entryByAddr(addr tcpip.Address) (NeighborEntry, bool) {
- s.mu.RLock()
- defer s.mu.RUnlock()
- entry, ok := s.entriesMap[addr]
- return entry, ok
-}
-
-// entries returns all entries in the store.
-func (s *testEntryStore) entries() []NeighborEntry {
- entries := make([]NeighborEntry, 0, len(s.entriesMap))
- s.mu.RLock()
- defer s.mu.RUnlock()
- for i := 0; i < entryStoreSize; i++ {
- addr := toAddress(i)
- if entry, ok := s.entriesMap[addr]; ok {
- entries = append(entries, entry)
- }
- }
- return entries
-}
-
-// set modifies the link addresses of an entry.
-func (s *testEntryStore) set(i int, linkAddr tcpip.LinkAddress) {
- addr := toAddress(i)
- s.mu.Lock()
- defer s.mu.Unlock()
- if entry, ok := s.entriesMap[addr]; ok {
- entry.LinkAddr = linkAddr
- s.entriesMap[addr] = entry
- }
-}
-
-// testNeighborResolver implements LinkAddressResolver to emulate sending a
-// neighbor probe.
-type testNeighborResolver struct {
- clock tcpip.Clock
- neigh *neighborCache
- entries *testEntryStore
- delay time.Duration
- onLinkAddressRequest func()
-}
-
-var _ LinkAddressResolver = (*testNeighborResolver)(nil)
-
-func (r *testNeighborResolver) LinkAddressRequest(addr, localAddr tcpip.Address, linkAddr tcpip.LinkAddress, linkEP LinkEndpoint) *tcpip.Error {
- // Delay handling the request to emulate network latency.
- r.clock.AfterFunc(r.delay, func() {
- r.fakeRequest(addr)
- })
-
- // Execute post address resolution action, if available.
- if f := r.onLinkAddressRequest; f != nil {
- f()
- }
- return nil
-}
-
-// fakeRequest emulates handling a response for a link address request.
-func (r *testNeighborResolver) fakeRequest(addr tcpip.Address) {
- if entry, ok := r.entries.entryByAddr(addr); ok {
- r.neigh.HandleConfirmation(addr, entry.LinkAddr, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- }
-}
-
-func (*testNeighborResolver) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bool) {
- if addr == testEntryBroadcastAddr {
- return testEntryBroadcastLinkAddr, true
- }
- return "", false
-}
-
-func (*testNeighborResolver) LinkAddressProtocol() tcpip.NetworkProtocolNumber {
- return 0
-}
-
-type entryEvent struct {
- nicID tcpip.NICID
- address tcpip.Address
- linkAddr tcpip.LinkAddress
- state NeighborState
-}
-
-func TestNeighborCacheGetConfig(t *testing.T) {
- nudDisp := testNUDDispatcher{}
- c := DefaultNUDConfigurations()
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, c, clock)
-
- if got, want := neigh.config(), c; got != want {
- t.Errorf("got neigh.config() = %+v, want = %+v", got, want)
- }
-
- // No events should have been dispatched.
- nudDisp.mu.Lock()
- defer nudDisp.mu.Unlock()
- if diff := cmp.Diff(nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-func TestNeighborCacheSetConfig(t *testing.T) {
- nudDisp := testNUDDispatcher{}
- c := DefaultNUDConfigurations()
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, c, clock)
-
- c.MinRandomFactor = 1
- c.MaxRandomFactor = 1
- neigh.setConfig(c)
-
- if got, want := neigh.config(), c; got != want {
- t.Errorf("got neigh.config() = %+v, want = %+v", got, want)
- }
-
- // No events should have been dispatched.
- nudDisp.mu.Lock()
- defer nudDisp.mu.Unlock()
- if diff := cmp.Diff(nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-func TestNeighborCacheEntry(t *testing.T) {
- c := DefaultNUDConfigurations()
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, c, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
-
- clock.advance(typicalLatency)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.events = nil
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- if _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil); err != nil {
- t.Fatalf("unexpected error from neigh.entry(%s, %s, _, nil): %s", entry.Addr, entry.LocalAddr, err)
- }
-
- // No more events should have been dispatched.
- nudDisp.mu.Lock()
- defer nudDisp.mu.Unlock()
- if diff := cmp.Diff(nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-func TestNeighborCacheRemoveEntry(t *testing.T) {
- config := DefaultNUDConfigurations()
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
-
- clock.advance(typicalLatency)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.events = nil
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- neigh.removeEntry(entry.Addr)
-
- {
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- if _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil); err != tcpip.ErrWouldBlock {
- t.Errorf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
-}
-
-type testContext struct {
- clock *fakeClock
- neigh *neighborCache
- store *testEntryStore
- linkRes *testNeighborResolver
- nudDisp *testNUDDispatcher
-}
-
-func newTestContext(c NUDConfigurations) testContext {
- nudDisp := &testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(nudDisp, c, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- return testContext{
- clock: clock,
- neigh: neigh,
- store: store,
- linkRes: linkRes,
- nudDisp: nudDisp,
- }
-}
-
-type overflowOptions struct {
- startAtEntryIndex int
- wantStaticEntries []NeighborEntry
-}
-
-func (c *testContext) overflowCache(opts overflowOptions) error {
- // Fill the neighbor cache to capacity to verify the LRU eviction strategy is
- // working properly after the entry removal.
- for i := opts.startAtEntryIndex; i < c.store.size(); i++ {
- // Add a new entry
- entry, ok := c.store.entry(i)
- if !ok {
- return fmt.Errorf("c.store.entry(%d) not found", i)
- }
- if _, _, err := c.neigh.entry(entry.Addr, entry.LocalAddr, c.linkRes, nil); err != tcpip.ErrWouldBlock {
- return fmt.Errorf("got c.neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- c.clock.advance(c.neigh.config().RetransmitTimer)
-
- var wantEvents []testEntryEventInfo
-
- // When beyond the full capacity, the cache will evict an entry as per the
- // LRU eviction strategy. Note that the number of static entries should not
- // affect the total number of dynamic entries that can be added.
- if i >= neighborCacheSize+opts.startAtEntryIndex {
- removedEntry, ok := c.store.entry(i - neighborCacheSize)
- if !ok {
- return fmt.Errorf("store.entry(%d) not found", i-neighborCacheSize)
- }
- wantEvents = append(wantEvents, testEntryEventInfo{
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: removedEntry.Addr,
- LinkAddr: removedEntry.LinkAddr,
- State: Reachable,
- })
- }
-
- wantEvents = append(wantEvents, testEntryEventInfo{
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- }, testEntryEventInfo{
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- })
-
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- return fmt.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- // Expect to find only the most recent entries. The order of entries reported
- // by entries() is undeterministic, so entries have to be sorted before
- // comparison.
- wantUnsortedEntries := opts.wantStaticEntries
- for i := c.store.size() - neighborCacheSize; i < c.store.size(); i++ {
- entry, ok := c.store.entry(i)
- if !ok {
- return fmt.Errorf("c.store.entry(%d) not found", i)
- }
- wantEntry := NeighborEntry{
- Addr: entry.Addr,
- LocalAddr: entry.LocalAddr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- }
- wantUnsortedEntries = append(wantUnsortedEntries, wantEntry)
- }
-
- if diff := cmp.Diff(c.neigh.entries(), wantUnsortedEntries, entryDiffOptsWithSort()...); diff != "" {
- return fmt.Errorf("neighbor entries mismatch (-got, +want):\n%s", diff)
- }
-
- // No more events should have been dispatched.
- c.nudDisp.mu.Lock()
- defer c.nudDisp.mu.Unlock()
- if diff := cmp.Diff(c.nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- return fmt.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- return nil
-}
-
-// TestNeighborCacheOverflow verifies that the LRU cache eviction strategy
-// respects the dynamic entry count.
-func TestNeighborCacheOverflow(t *testing.T) {
- config := DefaultNUDConfigurations()
- // Stay in Reachable so the cache can overflow
- config.BaseReachableTime = infiniteDuration
- config.MinRandomFactor = 1
- config.MaxRandomFactor = 1
-
- c := newTestContext(config)
- opts := overflowOptions{
- startAtEntryIndex: 0,
- }
- if err := c.overflowCache(opts); err != nil {
- t.Errorf("c.overflowCache(%+v): %s", opts, err)
- }
-}
-
-// TestNeighborCacheRemoveEntryThenOverflow verifies that the LRU cache
-// eviction strategy respects the dynamic entry count when an entry is removed.
-func TestNeighborCacheRemoveEntryThenOverflow(t *testing.T) {
- config := DefaultNUDConfigurations()
- // Stay in Reachable so the cache can overflow
- config.BaseReachableTime = infiniteDuration
- config.MinRandomFactor = 1
- config.MaxRandomFactor = 1
-
- c := newTestContext(config)
-
- // Add a dynamic entry
- entry, ok := c.store.entry(0)
- if !ok {
- t.Fatalf("c.store.entry(0) not found")
- }
- _, _, err := c.neigh.entry(entry.Addr, entry.LocalAddr, c.linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got c.neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- c.clock.advance(c.neigh.config().RetransmitTimer)
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- // Remove the entry
- c.neigh.removeEntry(entry.Addr)
-
- {
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- opts := overflowOptions{
- startAtEntryIndex: 0,
- }
- if err := c.overflowCache(opts); err != nil {
- t.Errorf("c.overflowCache(%+v): %s", opts, err)
- }
-}
-
-// TestNeighborCacheDuplicateStaticEntryWithSameLinkAddress verifies that
-// adding a duplicate static entry with the same link address does not dispatch
-// any events.
-func TestNeighborCacheDuplicateStaticEntryWithSameLinkAddress(t *testing.T) {
- config := DefaultNUDConfigurations()
- c := newTestContext(config)
-
- // Add a static entry
- entry, ok := c.store.entry(0)
- if !ok {
- t.Fatalf("c.store.entry(0) not found")
- }
- staticLinkAddr := entry.LinkAddr + "static"
- c.neigh.addStaticEntry(entry.Addr, staticLinkAddr)
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: staticLinkAddr,
- State: Static,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- // Remove the static entry that was just added
- c.neigh.addStaticEntry(entry.Addr, staticLinkAddr)
-
- // No more events should have been dispatched.
- c.nudDisp.mu.Lock()
- defer c.nudDisp.mu.Unlock()
- if diff := cmp.Diff(c.nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-// TestNeighborCacheDuplicateStaticEntryWithDifferentLinkAddress verifies that
-// adding a duplicate static entry with a different link address dispatches a
-// change event.
-func TestNeighborCacheDuplicateStaticEntryWithDifferentLinkAddress(t *testing.T) {
- config := DefaultNUDConfigurations()
- c := newTestContext(config)
-
- // Add a static entry
- entry, ok := c.store.entry(0)
- if !ok {
- t.Fatalf("c.store.entry(0) not found")
- }
- staticLinkAddr := entry.LinkAddr + "static"
- c.neigh.addStaticEntry(entry.Addr, staticLinkAddr)
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: staticLinkAddr,
- State: Static,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- // Add a duplicate entry with a different link address
- staticLinkAddr += "duplicate"
- c.neigh.addStaticEntry(entry.Addr, staticLinkAddr)
- {
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: staticLinkAddr,
- State: Static,
- },
- }
- c.nudDisp.mu.Lock()
- defer c.nudDisp.mu.Unlock()
- if diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-}
-
-// TestNeighborCacheRemoveStaticEntryThenOverflow verifies that the LRU cache
-// eviction strategy respects the dynamic entry count when a static entry is
-// added then removed. In this case, the dynamic entry count shouldn't have
-// been touched.
-func TestNeighborCacheRemoveStaticEntryThenOverflow(t *testing.T) {
- config := DefaultNUDConfigurations()
- // Stay in Reachable so the cache can overflow
- config.BaseReachableTime = infiniteDuration
- config.MinRandomFactor = 1
- config.MaxRandomFactor = 1
-
- c := newTestContext(config)
-
- // Add a static entry
- entry, ok := c.store.entry(0)
- if !ok {
- t.Fatalf("c.store.entry(0) not found")
- }
- staticLinkAddr := entry.LinkAddr + "static"
- c.neigh.addStaticEntry(entry.Addr, staticLinkAddr)
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: staticLinkAddr,
- State: Static,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- // Remove the static entry that was just added
- c.neigh.removeEntry(entry.Addr)
- {
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: staticLinkAddr,
- State: Static,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- opts := overflowOptions{
- startAtEntryIndex: 0,
- }
- if err := c.overflowCache(opts); err != nil {
- t.Errorf("c.overflowCache(%+v): %s", opts, err)
- }
-}
-
-// TestNeighborCacheOverwriteWithStaticEntryThenOverflow verifies that the LRU
-// cache eviction strategy keeps count of the dynamic entry count when an entry
-// is overwritten by a static entry. Static entries should not count towards
-// the size of the LRU cache.
-func TestNeighborCacheOverwriteWithStaticEntryThenOverflow(t *testing.T) {
- config := DefaultNUDConfigurations()
- // Stay in Reachable so the cache can overflow
- config.BaseReachableTime = infiniteDuration
- config.MinRandomFactor = 1
- config.MaxRandomFactor = 1
-
- c := newTestContext(config)
-
- // Add a dynamic entry
- entry, ok := c.store.entry(0)
- if !ok {
- t.Fatalf("c.store.entry(0) not found")
- }
- _, _, err := c.neigh.entry(entry.Addr, entry.LocalAddr, c.linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got c.neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- c.clock.advance(typicalLatency)
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- // Override the entry with a static one using the same address
- staticLinkAddr := entry.LinkAddr + "static"
- c.neigh.addStaticEntry(entry.Addr, staticLinkAddr)
- {
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: staticLinkAddr,
- State: Static,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- opts := overflowOptions{
- startAtEntryIndex: 1,
- wantStaticEntries: []NeighborEntry{
- {
- Addr: entry.Addr,
- LocalAddr: "", // static entries don't need a local address
- LinkAddr: staticLinkAddr,
- State: Static,
- },
- },
- }
- if err := c.overflowCache(opts); err != nil {
- t.Errorf("c.overflowCache(%+v): %s", opts, err)
- }
-}
-
-func TestNeighborCacheNotifiesWaker(t *testing.T) {
- config := DefaultNUDConfigurations()
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- w := sleep.Waker{}
- s := sleep.Sleeper{}
- const wakerID = 1
- s.AddWaker(&w, wakerID)
-
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- _, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, &w)
- if err != tcpip.ErrWouldBlock {
- t.Fatalf("got neigh.entry(%s, %s, _, _ = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- if doneCh == nil {
- t.Fatalf("expected done channel from neigh.entry(%s, %s, _, _)", entry.Addr, entry.LocalAddr)
- }
- clock.advance(typicalLatency)
-
- select {
- case <-doneCh:
- default:
- t.Fatal("expected notification from done channel")
- }
-
- id, ok := s.Fetch(false /* block */)
- if !ok {
- t.Errorf("expected waker to be notified after neigh.entry(%s, %s, _, _)", entry.Addr, entry.LocalAddr)
- }
- if id != wakerID {
- t.Errorf("got s.Fetch(false) = %d, want = %d", id, wakerID)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- defer nudDisp.mu.Unlock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-func TestNeighborCacheRemoveWaker(t *testing.T) {
- config := DefaultNUDConfigurations()
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- w := sleep.Waker{}
- s := sleep.Sleeper{}
- const wakerID = 1
- s.AddWaker(&w, wakerID)
-
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- _, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, &w)
- if err != tcpip.ErrWouldBlock {
- t.Fatalf("got neigh.entry(%s, %s, _, _) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- if doneCh == nil {
- t.Fatalf("expected done channel from neigh.entry(%s, %s, _, _)", entry.Addr, entry.LocalAddr)
- }
-
- // Remove the waker before the neighbor cache has the opportunity to send a
- // notification.
- neigh.removeWaker(entry.Addr, &w)
- clock.advance(typicalLatency)
-
- select {
- case <-doneCh:
- default:
- t.Fatal("expected notification from done channel")
- }
-
- if id, ok := s.Fetch(false /* block */); ok {
- t.Errorf("unexpected notification from waker with id %d", id)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- defer nudDisp.mu.Unlock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-func TestNeighborCacheAddStaticEntryThenOverflow(t *testing.T) {
- config := DefaultNUDConfigurations()
- // Stay in Reachable so the cache can overflow
- config.BaseReachableTime = infiniteDuration
- config.MinRandomFactor = 1
- config.MaxRandomFactor = 1
-
- c := newTestContext(config)
-
- entry, ok := c.store.entry(0)
- if !ok {
- t.Fatalf("c.store.entry(0) not found")
- }
- c.neigh.addStaticEntry(entry.Addr, entry.LinkAddr)
- e, _, err := c.neigh.entry(entry.Addr, "", c.linkRes, nil)
- if err != nil {
- t.Errorf("unexpected error from c.neigh.entry(%s, \"\", _, nil): %s", entry.Addr, err)
- }
- want := NeighborEntry{
- Addr: entry.Addr,
- LocalAddr: "", // static entries don't need a local address
- LinkAddr: entry.LinkAddr,
- State: Static,
- }
- if diff := cmp.Diff(e, want, entryDiffOpts()...); diff != "" {
- t.Errorf("c.neigh.entry(%s, \"\", _, nil) mismatch (-got, +want):\n%s", entry.Addr, diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Static,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- opts := overflowOptions{
- startAtEntryIndex: 1,
- wantStaticEntries: []NeighborEntry{
- {
- Addr: entry.Addr,
- LocalAddr: "", // static entries don't need a local address
- LinkAddr: entry.LinkAddr,
- State: Static,
- },
- },
- }
- if err := c.overflowCache(opts); err != nil {
- t.Errorf("c.overflowCache(%+v): %s", opts, err)
- }
-}
-
-func TestNeighborCacheClear(t *testing.T) {
- config := DefaultNUDConfigurations()
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- // Add a dynamic entry.
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- clock.advance(typicalLatency)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.events = nil
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- // Add a static entry.
- neigh.addStaticEntry(entryTestAddr1, entryTestLinkAddr1)
-
- {
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Static,
- },
- }
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.events = nil
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- // Clear shoud remove both dynamic and static entries.
- neigh.clear()
-
- // Remove events dispatched from clear() have no deterministic order so they
- // need to be sorted beforehand.
- wantUnsortedEvents := []testEntryEventInfo{
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Static,
- },
- }
- nudDisp.mu.Lock()
- defer nudDisp.mu.Unlock()
- if diff := cmp.Diff(nudDisp.events, wantUnsortedEvents, eventDiffOptsWithSort()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-// TestNeighborCacheClearThenOverflow verifies that the LRU cache eviction
-// strategy keeps count of the dynamic entry count when all entries are
-// cleared.
-func TestNeighborCacheClearThenOverflow(t *testing.T) {
- config := DefaultNUDConfigurations()
- // Stay in Reachable so the cache can overflow
- config.BaseReachableTime = infiniteDuration
- config.MinRandomFactor = 1
- config.MaxRandomFactor = 1
-
- c := newTestContext(config)
-
- // Add a dynamic entry
- entry, ok := c.store.entry(0)
- if !ok {
- t.Fatalf("c.store.entry(0) not found")
- }
- _, _, err := c.neigh.entry(entry.Addr, entry.LocalAddr, c.linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got c.neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- c.clock.advance(typicalLatency)
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-
- // Clear the cache.
- c.neigh.clear()
- {
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- c.nudDisp.mu.Lock()
- diff := cmp.Diff(c.nudDisp.events, wantEvents, eventDiffOpts()...)
- c.nudDisp.events = nil
- c.nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- opts := overflowOptions{
- startAtEntryIndex: 0,
- }
- if err := c.overflowCache(opts); err != nil {
- t.Errorf("c.overflowCache(%+v): %s", opts, err)
- }
-}
-
-func TestNeighborCacheKeepFrequentlyUsed(t *testing.T) {
- config := DefaultNUDConfigurations()
- // Stay in Reachable so the cache can overflow
- config.BaseReachableTime = infiniteDuration
- config.MinRandomFactor = 1
- config.MaxRandomFactor = 1
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- frequentlyUsedEntry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
-
- // The following logic is very similar to overflowCache, but
- // periodically refreshes the frequently used entry.
-
- // Fill the neighbor cache to capacity
- for i := 0; i < neighborCacheSize; i++ {
- entry, ok := store.entry(i)
- if !ok {
- t.Fatalf("store.entry(%d) not found", i)
- }
- _, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- clock.advance(typicalLatency)
- select {
- case <-doneCh:
- default:
- t.Fatalf("expected notification from done channel returned by neigh.entry(%s, %s, _, nil)", entry.Addr, entry.LocalAddr)
- }
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.events = nil
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- // Keep adding more entries
- for i := neighborCacheSize; i < store.size(); i++ {
- // Periodically refresh the frequently used entry
- if i%(neighborCacheSize/2) == 0 {
- _, _, err := neigh.entry(frequentlyUsedEntry.Addr, frequentlyUsedEntry.LocalAddr, linkRes, nil)
- if err != nil {
- t.Errorf("unexpected error from neigh.entry(%s, %s, _, nil): %s", frequentlyUsedEntry.Addr, frequentlyUsedEntry.LocalAddr, err)
- }
- }
-
- entry, ok := store.entry(i)
- if !ok {
- t.Fatalf("store.entry(%d) not found", i)
- }
- _, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Errorf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- clock.advance(typicalLatency)
- select {
- case <-doneCh:
- default:
- t.Fatalf("expected notification from done channel returned by neigh.entry(%s, %s, _, nil)", entry.Addr, entry.LocalAddr)
- }
-
- // An entry should have been removed, as per the LRU eviction strategy
- removedEntry, ok := store.entry(i - neighborCacheSize + 1)
- if !ok {
- t.Fatalf("store.entry(%d) not found", i-neighborCacheSize+1)
- }
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestRemoved,
- NICID: 1,
- Addr: removedEntry.Addr,
- LinkAddr: removedEntry.LinkAddr,
- State: Reachable,
- },
- {
- EventType: entryTestAdded,
- NICID: 1,
- Addr: entry.Addr,
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: 1,
- Addr: entry.Addr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.events = nil
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-
- // Expect to find only the frequently used entry and the most recent entries.
- // The order of entries reported by entries() is undeterministic, so entries
- // have to be sorted before comparison.
- wantUnsortedEntries := []NeighborEntry{
- {
- Addr: frequentlyUsedEntry.Addr,
- LocalAddr: frequentlyUsedEntry.LocalAddr,
- LinkAddr: frequentlyUsedEntry.LinkAddr,
- State: Reachable,
- },
- }
-
- for i := store.size() - neighborCacheSize + 1; i < store.size(); i++ {
- entry, ok := store.entry(i)
- if !ok {
- t.Fatalf("store.entry(%d) not found", i)
- }
- wantEntry := NeighborEntry{
- Addr: entry.Addr,
- LocalAddr: entry.LocalAddr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- }
- wantUnsortedEntries = append(wantUnsortedEntries, wantEntry)
- }
-
- if diff := cmp.Diff(neigh.entries(), wantUnsortedEntries, entryDiffOptsWithSort()...); diff != "" {
- t.Errorf("neighbor entries mismatch (-got, +want):\n%s", diff)
- }
-
- // No more events should have been dispatched.
- nudDisp.mu.Lock()
- defer nudDisp.mu.Unlock()
- if diff := cmp.Diff(nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
-}
-
-func TestNeighborCacheConcurrent(t *testing.T) {
- const concurrentProcesses = 16
-
- config := DefaultNUDConfigurations()
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- storeEntries := store.entries()
- for _, entry := range storeEntries {
- var wg sync.WaitGroup
- for r := 0; r < concurrentProcesses; r++ {
- wg.Add(1)
- go func(entry NeighborEntry) {
- defer wg.Done()
- e, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != nil && err != tcpip.ErrWouldBlock {
- t.Errorf("got neigh.entry(%s, %s, _, nil) = (%+v, _, %s), want (_, _, nil) or (_, _, %s)", entry.Addr, entry.LocalAddr, e, err, tcpip.ErrWouldBlock)
- }
- }(entry)
- }
-
- // Wait for all gorountines to send a request
- wg.Wait()
-
- // Process all the requests for a single entry concurrently
- clock.advance(typicalLatency)
- }
-
- // All goroutines add in the same order and add more values than can fit in
- // the cache. Our eviction strategy requires that the last entries are
- // present, up to the size of the neighbor cache, and the rest are missing.
- // The order of entries reported by entries() is undeterministic, so entries
- // have to be sorted before comparison.
- var wantUnsortedEntries []NeighborEntry
- for i := store.size() - neighborCacheSize; i < store.size(); i++ {
- entry, ok := store.entry(i)
- if !ok {
- t.Errorf("store.entry(%d) not found", i)
- }
- wantEntry := NeighborEntry{
- Addr: entry.Addr,
- LocalAddr: entry.LocalAddr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- }
- wantUnsortedEntries = append(wantUnsortedEntries, wantEntry)
- }
-
- if diff := cmp.Diff(neigh.entries(), wantUnsortedEntries, entryDiffOptsWithSort()...); diff != "" {
- t.Errorf("neighbor entries mismatch (-got, +want):\n%s", diff)
- }
-}
-
-func TestNeighborCacheReplace(t *testing.T) {
- config := DefaultNUDConfigurations()
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- // Add an entry
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- _, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- clock.advance(typicalLatency)
- select {
- case <-doneCh:
- default:
- t.Fatalf("expected notification from done channel returned by neigh.entry(%s, %s, _, nil)", entry.Addr, entry.LocalAddr)
- }
-
- // Verify the entry exists
- e, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != nil {
- t.Errorf("unexpected error from neigh.entry(%s, %s, _, nil): %s", entry.Addr, entry.LocalAddr, err)
- }
- if doneCh != nil {
- t.Errorf("unexpected done channel from neigh.entry(%s, %s, _, nil): %v", entry.Addr, entry.LocalAddr, doneCh)
- }
- if t.Failed() {
- t.FailNow()
- }
- want := NeighborEntry{
- Addr: entry.Addr,
- LocalAddr: entry.LocalAddr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- }
- if diff := cmp.Diff(e, want, entryDiffOpts()...); diff != "" {
- t.Errorf("neigh.entry(%s, %s, _, nil) mismatch (-got, +want):\n%s", entry.Addr, entry.LinkAddr, diff)
- }
-
- // Notify of a link address change
- var updatedLinkAddr tcpip.LinkAddress
- {
- entry, ok := store.entry(1)
- if !ok {
- t.Fatalf("store.entry(1) not found")
- }
- updatedLinkAddr = entry.LinkAddr
- }
- store.set(0, updatedLinkAddr)
- neigh.HandleConfirmation(entry.Addr, updatedLinkAddr, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: true,
- IsRouter: false,
- })
-
- // Requesting the entry again should start address resolution
- {
- _, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- t.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- clock.advance(config.DelayFirstProbeTime + typicalLatency)
- select {
- case <-doneCh:
- default:
- t.Fatalf("expected notification from done channel returned by neigh.entry(%s, %s, _, nil)", entry.Addr, entry.LocalAddr)
- }
- }
-
- // Verify the entry's new link address
- {
- e, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- clock.advance(typicalLatency)
- if err != nil {
- t.Errorf("unexpected error from neigh.entry(%s, %s, _, nil): %s", entry.Addr, entry.LocalAddr, err)
- }
- want = NeighborEntry{
- Addr: entry.Addr,
- LocalAddr: entry.LocalAddr,
- LinkAddr: updatedLinkAddr,
- State: Reachable,
- }
- if diff := cmp.Diff(e, want, entryDiffOpts()...); diff != "" {
- t.Errorf("neigh.entry(%s, %s, _, nil) mismatch (-got, +want):\n%s", entry.Addr, entry.LocalAddr, diff)
- }
- }
-}
-
-func TestNeighborCacheResolutionFailed(t *testing.T) {
- config := DefaultNUDConfigurations()
-
- nudDisp := testNUDDispatcher{}
- clock := newFakeClock()
- neigh := newTestNeighborCache(&nudDisp, config, clock)
- store := newTestEntryStore()
-
- var requestCount uint32
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- onLinkAddressRequest: func() {
- atomic.AddUint32(&requestCount, 1)
- },
- }
-
- // First, sanity check that resolution is working
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- if _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil); err != tcpip.ErrWouldBlock {
- t.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- clock.advance(typicalLatency)
- got, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != nil {
- t.Fatalf("unexpected error from neigh.entry(%s, %s, _, nil): %s", entry.Addr, entry.LocalAddr, err)
- }
- want := NeighborEntry{
- Addr: entry.Addr,
- LocalAddr: entry.LocalAddr,
- LinkAddr: entry.LinkAddr,
- State: Reachable,
- }
- if diff := cmp.Diff(got, want, entryDiffOpts()...); diff != "" {
- t.Errorf("neigh.entry(%s, %s, _, nil) mismatch (-got, +want):\n%s", entry.Addr, entry.LocalAddr, diff)
- }
-
- // Verify that address resolution for an unknown address returns ErrNoLinkAddress
- before := atomic.LoadUint32(&requestCount)
-
- entry.Addr += "2"
- if _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil); err != tcpip.ErrWouldBlock {
- t.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- waitFor := config.DelayFirstProbeTime + typicalLatency*time.Duration(config.MaxMulticastProbes)
- clock.advance(waitFor)
- if _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil); err != tcpip.ErrNoLinkAddress {
- t.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrNoLinkAddress)
- }
-
- maxAttempts := neigh.config().MaxUnicastProbes
- if got, want := atomic.LoadUint32(&requestCount)-before, maxAttempts; got != want {
- t.Errorf("got link address request count = %d, want = %d", got, want)
- }
-}
-
-// TestNeighborCacheResolutionTimeout simulates sending MaxMulticastProbes
-// probes and not retrieving a confirmation before the duration defined by
-// MaxMulticastProbes * RetransmitTimer.
-func TestNeighborCacheResolutionTimeout(t *testing.T) {
- config := DefaultNUDConfigurations()
- config.RetransmitTimer = time.Millisecond // small enough to cause timeout
-
- clock := newFakeClock()
- neigh := newTestNeighborCache(nil, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: time.Minute, // large enough to cause timeout
- }
-
- entry, ok := store.entry(0)
- if !ok {
- t.Fatalf("store.entry(0) not found")
- }
- if _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil); err != tcpip.ErrWouldBlock {
- t.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- waitFor := config.RetransmitTimer * time.Duration(config.MaxMulticastProbes)
- clock.advance(waitFor)
- if _, _, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil); err != tcpip.ErrNoLinkAddress {
- t.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrNoLinkAddress)
- }
-}
-
-// TestNeighborCacheStaticResolution checks that static link addresses are
-// resolved immediately and don't send resolution requests.
-func TestNeighborCacheStaticResolution(t *testing.T) {
- config := DefaultNUDConfigurations()
- clock := newFakeClock()
- neigh := newTestNeighborCache(nil, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: typicalLatency,
- }
-
- got, _, err := neigh.entry(testEntryBroadcastAddr, testEntryLocalAddr, linkRes, nil)
- if err != nil {
- t.Fatalf("unexpected error from neigh.entry(%s, %s, _, nil): %s", testEntryBroadcastAddr, testEntryLocalAddr, err)
- }
- want := NeighborEntry{
- Addr: testEntryBroadcastAddr,
- LocalAddr: testEntryLocalAddr,
- LinkAddr: testEntryBroadcastLinkAddr,
- State: Static,
- }
- if diff := cmp.Diff(got, want, entryDiffOpts()...); diff != "" {
- t.Errorf("neigh.entry(%s, %s, _, nil) mismatch (-got, +want):\n%s", testEntryBroadcastAddr, testEntryLocalAddr, diff)
- }
-}
-
-func BenchmarkCacheClear(b *testing.B) {
- b.StopTimer()
- config := DefaultNUDConfigurations()
- clock := &tcpip.StdClock{}
- neigh := newTestNeighborCache(nil, config, clock)
- store := newTestEntryStore()
- linkRes := &testNeighborResolver{
- clock: clock,
- neigh: neigh,
- entries: store,
- delay: 0,
- }
-
- // Clear for every possible size of the cache
- for cacheSize := 0; cacheSize < neighborCacheSize; cacheSize++ {
- // Fill the neighbor cache to capacity.
- for i := 0; i < cacheSize; i++ {
- entry, ok := store.entry(i)
- if !ok {
- b.Fatalf("store.entry(%d) not found", i)
- }
- _, doneCh, err := neigh.entry(entry.Addr, entry.LocalAddr, linkRes, nil)
- if err != tcpip.ErrWouldBlock {
- b.Fatalf("got neigh.entry(%s, %s, _, nil) = %v, want = %s", entry.Addr, entry.LocalAddr, err, tcpip.ErrWouldBlock)
- }
- if doneCh != nil {
- <-doneCh
- }
- }
-
- b.StartTimer()
- neigh.clear()
- b.StopTimer()
- }
-}
diff --git a/pkg/tcpip/stack/neighbor_entry_list.go b/pkg/tcpip/stack/neighbor_entry_list.go
new file mode 100644
index 000000000..b732257d2
--- /dev/null
+++ b/pkg/tcpip/stack/neighbor_entry_list.go
@@ -0,0 +1,193 @@
+package stack
+
+// ElementMapper provides an identity mapping by default.
+//
+// This can be replaced to provide a struct that maps elements to linker
+// objects, if they are not the same. An ElementMapper is not typically
+// required if: Linker is left as is, Element is left as is, or Linker and
+// Element are the same type.
+type neighborEntryElementMapper struct{}
+
+// linkerFor maps an Element to a Linker.
+//
+// This default implementation should be inlined.
+//
+//go:nosplit
+func (neighborEntryElementMapper) linkerFor(elem *neighborEntry) *neighborEntry { return elem }
+
+// List is an intrusive list. Entries can be added to or removed from the list
+// in O(1) time and with no additional memory allocations.
+//
+// The zero value for List is an empty list ready to use.
+//
+// To iterate over a list (where l is a List):
+// for e := l.Front(); e != nil; e = e.Next() {
+// // do something with e.
+// }
+//
+// +stateify savable
+type neighborEntryList struct {
+ head *neighborEntry
+ tail *neighborEntry
+}
+
+// Reset resets list l to the empty state.
+func (l *neighborEntryList) Reset() {
+ l.head = nil
+ l.tail = nil
+}
+
+// Empty returns true iff the list is empty.
+func (l *neighborEntryList) Empty() bool {
+ return l.head == nil
+}
+
+// Front returns the first element of list l or nil.
+func (l *neighborEntryList) Front() *neighborEntry {
+ return l.head
+}
+
+// Back returns the last element of list l or nil.
+func (l *neighborEntryList) Back() *neighborEntry {
+ return l.tail
+}
+
+// Len returns the number of elements in the list.
+//
+// NOTE: This is an O(n) operation.
+func (l *neighborEntryList) Len() (count int) {
+ for e := l.Front(); e != nil; e = (neighborEntryElementMapper{}.linkerFor(e)).Next() {
+ count++
+ }
+ return count
+}
+
+// PushFront inserts the element e at the front of list l.
+func (l *neighborEntryList) PushFront(e *neighborEntry) {
+ linker := neighborEntryElementMapper{}.linkerFor(e)
+ linker.SetNext(l.head)
+ linker.SetPrev(nil)
+ if l.head != nil {
+ neighborEntryElementMapper{}.linkerFor(l.head).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+
+ l.head = e
+}
+
+// PushBack inserts the element e at the back of list l.
+func (l *neighborEntryList) PushBack(e *neighborEntry) {
+ linker := neighborEntryElementMapper{}.linkerFor(e)
+ linker.SetNext(nil)
+ linker.SetPrev(l.tail)
+ if l.tail != nil {
+ neighborEntryElementMapper{}.linkerFor(l.tail).SetNext(e)
+ } else {
+ l.head = e
+ }
+
+ l.tail = e
+}
+
+// PushBackList inserts list m at the end of list l, emptying m.
+func (l *neighborEntryList) PushBackList(m *neighborEntryList) {
+ if l.head == nil {
+ l.head = m.head
+ l.tail = m.tail
+ } else if m.head != nil {
+ neighborEntryElementMapper{}.linkerFor(l.tail).SetNext(m.head)
+ neighborEntryElementMapper{}.linkerFor(m.head).SetPrev(l.tail)
+
+ l.tail = m.tail
+ }
+ m.head = nil
+ m.tail = nil
+}
+
+// InsertAfter inserts e after b.
+func (l *neighborEntryList) InsertAfter(b, e *neighborEntry) {
+ bLinker := neighborEntryElementMapper{}.linkerFor(b)
+ eLinker := neighborEntryElementMapper{}.linkerFor(e)
+
+ a := bLinker.Next()
+
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ bLinker.SetNext(e)
+
+ if a != nil {
+ neighborEntryElementMapper{}.linkerFor(a).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+}
+
+// InsertBefore inserts e before a.
+func (l *neighborEntryList) InsertBefore(a, e *neighborEntry) {
+ aLinker := neighborEntryElementMapper{}.linkerFor(a)
+ eLinker := neighborEntryElementMapper{}.linkerFor(e)
+
+ b := aLinker.Prev()
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ aLinker.SetPrev(e)
+
+ if b != nil {
+ neighborEntryElementMapper{}.linkerFor(b).SetNext(e)
+ } else {
+ l.head = e
+ }
+}
+
+// Remove removes e from l.
+func (l *neighborEntryList) Remove(e *neighborEntry) {
+ linker := neighborEntryElementMapper{}.linkerFor(e)
+ prev := linker.Prev()
+ next := linker.Next()
+
+ if prev != nil {
+ neighborEntryElementMapper{}.linkerFor(prev).SetNext(next)
+ } else if l.head == e {
+ l.head = next
+ }
+
+ if next != nil {
+ neighborEntryElementMapper{}.linkerFor(next).SetPrev(prev)
+ } else if l.tail == e {
+ l.tail = prev
+ }
+
+ linker.SetNext(nil)
+ linker.SetPrev(nil)
+}
+
+// Entry is a default implementation of Linker. Users can add anonymous fields
+// of this type to their structs to make them automatically implement the
+// methods needed by List.
+//
+// +stateify savable
+type neighborEntryEntry struct {
+ next *neighborEntry
+ prev *neighborEntry
+}
+
+// Next returns the entry that follows e in the list.
+func (e *neighborEntryEntry) Next() *neighborEntry {
+ return e.next
+}
+
+// Prev returns the entry that precedes e in the list.
+func (e *neighborEntryEntry) Prev() *neighborEntry {
+ return e.prev
+}
+
+// SetNext assigns 'entry' as the entry that follows e in the list.
+func (e *neighborEntryEntry) SetNext(elem *neighborEntry) {
+ e.next = elem
+}
+
+// SetPrev assigns 'entry' as the entry that precedes e in the list.
+func (e *neighborEntryEntry) SetPrev(elem *neighborEntry) {
+ e.prev = elem
+}
diff --git a/pkg/tcpip/stack/neighbor_entry_test.go b/pkg/tcpip/stack/neighbor_entry_test.go
deleted file mode 100644
index b769fb2fa..000000000
--- a/pkg/tcpip/stack/neighbor_entry_test.go
+++ /dev/null
@@ -1,2870 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack
-
-import (
- "fmt"
- "math"
- "math/rand"
- "strings"
- "sync"
- "testing"
- "time"
-
- "github.com/google/go-cmp/cmp"
- "github.com/google/go-cmp/cmp/cmpopts"
- "gvisor.dev/gvisor/pkg/sleep"
- "gvisor.dev/gvisor/pkg/tcpip"
-)
-
-const (
- entryTestNetNumber tcpip.NetworkProtocolNumber = math.MaxUint32
-
- entryTestNICID tcpip.NICID = 1
- entryTestAddr1 = tcpip.Address("\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01")
- entryTestAddr2 = tcpip.Address("\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02")
-
- entryTestLinkAddr1 = tcpip.LinkAddress("\x0a\x00\x00\x00\x00\x01")
- entryTestLinkAddr2 = tcpip.LinkAddress("\x0a\x00\x00\x00\x00\x02")
-
- // entryTestNetDefaultMTU is the MTU, in bytes, used throughout the tests,
- // except where another value is explicitly used. It is chosen to match the
- // MTU of loopback interfaces on Linux systems.
- entryTestNetDefaultMTU = 65536
-)
-
-// eventDiffOpts are the options passed to cmp.Diff to compare entry events.
-// The UpdatedAt field is ignored due to a lack of a deterministic method to
-// predict the time that an event will be dispatched.
-func eventDiffOpts() []cmp.Option {
- return []cmp.Option{
- cmpopts.IgnoreFields(testEntryEventInfo{}, "UpdatedAt"),
- }
-}
-
-// eventDiffOptsWithSort is like eventDiffOpts but also includes an option to
-// sort slices of events for cases where ordering must be ignored.
-func eventDiffOptsWithSort() []cmp.Option {
- return []cmp.Option{
- cmpopts.IgnoreFields(testEntryEventInfo{}, "UpdatedAt"),
- cmpopts.SortSlices(func(a, b testEntryEventInfo) bool {
- return strings.Compare(string(a.Addr), string(b.Addr)) < 0
- }),
- }
-}
-
-// The following unit tests exercise every state transition and verify its
-// behavior with RFC 4681.
-//
-// | From | To | Cause | Action | Event |
-// | ========== | ========== | ========================================== | =============== | ======= |
-// | Unknown | Unknown | Confirmation w/ unknown address | | Added |
-// | Unknown | Incomplete | Packet queued to unknown address | Send probe | Added |
-// | Unknown | Stale | Probe w/ unknown address | | Added |
-// | Incomplete | Incomplete | Retransmit timer expired | Send probe | Changed |
-// | Incomplete | Reachable | Solicited confirmation | Notify wakers | Changed |
-// | Incomplete | Stale | Unsolicited confirmation | Notify wakers | Changed |
-// | Incomplete | Failed | Max probes sent without reply | Notify wakers | Removed |
-// | Reachable | Reachable | Confirmation w/ different isRouter flag | Update IsRouter | |
-// | Reachable | Stale | Reachable timer expired | | Changed |
-// | Reachable | Stale | Probe or confirmation w/ different address | | Changed |
-// | Stale | Reachable | Solicited override confirmation | Update LinkAddr | Changed |
-// | Stale | Stale | Override confirmation | Update LinkAddr | Changed |
-// | Stale | Stale | Probe w/ different address | Update LinkAddr | Changed |
-// | Stale | Delay | Packet sent | | Changed |
-// | Delay | Reachable | Upper-layer confirmation | | Changed |
-// | Delay | Reachable | Solicited override confirmation | Update LinkAddr | Changed |
-// | Delay | Stale | Probe or confirmation w/ different address | | Changed |
-// | Delay | Probe | Delay timer expired | Send probe | Changed |
-// | Probe | Reachable | Solicited override confirmation | Update LinkAddr | Changed |
-// | Probe | Reachable | Solicited confirmation w/ same address | Notify wakers | Changed |
-// | Probe | Stale | Probe or confirmation w/ different address | | Changed |
-// | Probe | Probe | Retransmit timer expired | Send probe | Changed |
-// | Probe | Failed | Max probes sent without reply | Notify wakers | Removed |
-// | Failed | | Unreachability timer expired | Delete entry | |
-
-type testEntryEventType uint8
-
-const (
- entryTestAdded testEntryEventType = iota
- entryTestChanged
- entryTestRemoved
-)
-
-func (t testEntryEventType) String() string {
- switch t {
- case entryTestAdded:
- return "add"
- case entryTestChanged:
- return "change"
- case entryTestRemoved:
- return "remove"
- default:
- return fmt.Sprintf("unknown (%d)", t)
- }
-}
-
-// Fields are exported for use with cmp.Diff.
-type testEntryEventInfo struct {
- EventType testEntryEventType
- NICID tcpip.NICID
- Addr tcpip.Address
- LinkAddr tcpip.LinkAddress
- State NeighborState
- UpdatedAt time.Time
-}
-
-func (e testEntryEventInfo) String() string {
- return fmt.Sprintf("%s event for NIC #%d, addr=%q, linkAddr=%q, state=%q", e.EventType, e.NICID, e.Addr, e.LinkAddr, e.State)
-}
-
-// testNUDDispatcher implements NUDDispatcher to validate the dispatching of
-// events upon certain NUD state machine events.
-type testNUDDispatcher struct {
- mu sync.Mutex
- events []testEntryEventInfo
-}
-
-var _ NUDDispatcher = (*testNUDDispatcher)(nil)
-
-func (d *testNUDDispatcher) queueEvent(e testEntryEventInfo) {
- d.mu.Lock()
- defer d.mu.Unlock()
- d.events = append(d.events, e)
-}
-
-func (d *testNUDDispatcher) OnNeighborAdded(nicID tcpip.NICID, addr tcpip.Address, linkAddr tcpip.LinkAddress, state NeighborState, updatedAt time.Time) {
- d.queueEvent(testEntryEventInfo{
- EventType: entryTestAdded,
- NICID: nicID,
- Addr: addr,
- LinkAddr: linkAddr,
- State: state,
- UpdatedAt: updatedAt,
- })
-}
-
-func (d *testNUDDispatcher) OnNeighborChanged(nicID tcpip.NICID, addr tcpip.Address, linkAddr tcpip.LinkAddress, state NeighborState, updatedAt time.Time) {
- d.queueEvent(testEntryEventInfo{
- EventType: entryTestChanged,
- NICID: nicID,
- Addr: addr,
- LinkAddr: linkAddr,
- State: state,
- UpdatedAt: updatedAt,
- })
-}
-
-func (d *testNUDDispatcher) OnNeighborRemoved(nicID tcpip.NICID, addr tcpip.Address, linkAddr tcpip.LinkAddress, state NeighborState, updatedAt time.Time) {
- d.queueEvent(testEntryEventInfo{
- EventType: entryTestRemoved,
- NICID: nicID,
- Addr: addr,
- LinkAddr: linkAddr,
- State: state,
- UpdatedAt: updatedAt,
- })
-}
-
-type entryTestLinkResolver struct {
- mu sync.Mutex
- probes []entryTestProbeInfo
-}
-
-var _ LinkAddressResolver = (*entryTestLinkResolver)(nil)
-
-type entryTestProbeInfo struct {
- RemoteAddress tcpip.Address
- RemoteLinkAddress tcpip.LinkAddress
- LocalAddress tcpip.Address
-}
-
-func (p entryTestProbeInfo) String() string {
- return fmt.Sprintf("probe with RemoteAddress=%q, RemoteLinkAddress=%q, LocalAddress=%q", p.RemoteAddress, p.RemoteLinkAddress, p.LocalAddress)
-}
-
-// LinkAddressRequest sends a request for the LinkAddress of addr. Broadcasts
-// to the local network if linkAddr is the zero value.
-func (r *entryTestLinkResolver) LinkAddressRequest(addr, localAddr tcpip.Address, linkAddr tcpip.LinkAddress, linkEP LinkEndpoint) *tcpip.Error {
- p := entryTestProbeInfo{
- RemoteAddress: addr,
- RemoteLinkAddress: linkAddr,
- LocalAddress: localAddr,
- }
- r.mu.Lock()
- defer r.mu.Unlock()
- r.probes = append(r.probes, p)
- return nil
-}
-
-// ResolveStaticAddress attempts to resolve address without sending requests.
-// It either resolves the name immediately or returns the empty LinkAddress.
-func (r *entryTestLinkResolver) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bool) {
- return "", false
-}
-
-// LinkAddressProtocol returns the network protocol of the addresses this
-// resolver can resolve.
-func (r *entryTestLinkResolver) LinkAddressProtocol() tcpip.NetworkProtocolNumber {
- return entryTestNetNumber
-}
-
-func entryTestSetup(c NUDConfigurations) (*neighborEntry, *testNUDDispatcher, *entryTestLinkResolver, *fakeClock) {
- clock := newFakeClock()
- disp := testNUDDispatcher{}
- nic := NIC{
- id: entryTestNICID,
- linkEP: nil, // entryTestLinkResolver doesn't use a LinkEndpoint
- stack: &Stack{
- clock: clock,
- nudDisp: &disp,
- },
- }
-
- rng := rand.New(rand.NewSource(time.Now().UnixNano()))
- nudState := NewNUDState(c, rng)
- linkRes := entryTestLinkResolver{}
- entry := newNeighborEntry(&nic, entryTestAddr1 /* remoteAddr */, entryTestAddr2 /* localAddr */, nudState, &linkRes)
-
- // Stub out ndpState to verify modification of default routers.
- nic.mu.ndp = ndpState{
- nic: &nic,
- defaultRouters: make(map[tcpip.Address]defaultRouterState),
- }
-
- // Stub out the neighbor cache to verify deletion from the cache.
- nic.neigh = &neighborCache{
- nic: &nic,
- state: nudState,
- cache: make(map[tcpip.Address]*neighborEntry, neighborCacheSize),
- }
- nic.neigh.cache[entryTestAddr1] = entry
-
- return entry, &disp, &linkRes, clock
-}
-
-// TestEntryInitiallyUnknown verifies that the state of a newly created
-// neighborEntry is Unknown.
-func TestEntryInitiallyUnknown(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- if got, want := e.neigh.State, Unknown; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- clock.advance(c.RetransmitTimer)
-
- // No probes should have been sent.
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, []entryTestProbeInfo(nil))
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- // No events should have been dispatched.
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryUnknownToUnknownWhenConfirmationWithUnknownAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Unknown; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- clock.advance(time.Hour)
-
- // No probes should have been sent.
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, []entryTestProbeInfo(nil))
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- // No events should have been dispatched.
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, []testEntryEventInfo(nil)); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryUnknownToIncomplete(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Incomplete; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- }
- {
- nudDisp.mu.Lock()
- diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...)
- nudDisp.mu.Unlock()
- if diff != "" {
- t.Fatalf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- }
-}
-
-func TestEntryUnknownToStale(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handleProbeLocked(entryTestLinkAddr1)
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- // No probes should have been sent.
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, []entryTestProbeInfo(nil))
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryIncompleteToIncompleteDoesNotChangeUpdatedAt(t *testing.T) {
- c := DefaultNUDConfigurations()
- c.MaxMulticastProbes = 3
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Incomplete; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- updatedAt := e.neigh.UpdatedAt
- e.mu.Unlock()
-
- clock.advance(c.RetransmitTimer)
-
- // UpdatedAt should remain the same during address resolution.
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.probes = nil
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- e.mu.Lock()
- if got, want := e.neigh.UpdatedAt, updatedAt; got != want {
- t.Errorf("got e.neigh.UpdatedAt = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- clock.advance(c.RetransmitTimer)
-
- // UpdatedAt should change after failing address resolution. Timing out after
- // sending the last probe transitions the entry to Failed.
- {
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
- }
-
- clock.advance(c.RetransmitTimer)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestRemoved,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, notWant := e.neigh.UpdatedAt, updatedAt; got == notWant {
- t.Errorf("expected e.neigh.UpdatedAt to change, got = %q", got)
- }
- e.mu.Unlock()
-}
-
-func TestEntryIncompleteToReachable(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Incomplete; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-// TestEntryAddsAndClearsWakers verifies that wakers are added when
-// addWakerLocked is called and cleared when address resolution finishes. In
-// this case, address resolution will finish when transitioning from Incomplete
-// to Reachable.
-func TestEntryAddsAndClearsWakers(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- w := sleep.Waker{}
- s := sleep.Sleeper{}
- s.AddWaker(&w, 123)
- defer s.Done()
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- if got := e.wakers; got != nil {
- t.Errorf("got e.wakers = %v, want = nil", got)
- }
- e.addWakerLocked(&w)
- if got, want := w.IsAsserted(), false; got != want {
- t.Errorf("waker.IsAsserted() = %t, want = %t", got, want)
- }
- if e.wakers == nil {
- t.Error("expected e.wakers to be non-nil")
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if e.wakers != nil {
- t.Errorf("got e.wakers = %v, want = nil", e.wakers)
- }
- if got, want := w.IsAsserted(), true; got != want {
- t.Errorf("waker.IsAsserted() = %t, want = %t", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryIncompleteToReachableWithRouterFlag(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Incomplete; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: true,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.isRouter, true; got != want {
- t.Errorf("got e.isRouter = %t, want = %t", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- if diff := cmp.Diff(linkRes.probes, wantProbes); diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
- linkRes.mu.Unlock()
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryIncompleteToStale(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Incomplete; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryIncompleteToFailed(t *testing.T) {
- c := DefaultNUDConfigurations()
- c.MaxMulticastProbes = 3
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Incomplete; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- waitFor := c.RetransmitTimer * time.Duration(c.MaxMulticastProbes)
- clock.advance(waitFor)
-
- wantProbes := []entryTestProbeInfo{
- // The Incomplete-to-Incomplete state transition is tested here by
- // verifying that 3 reachability probes were sent.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestRemoved,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Failed; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-type testLocker struct{}
-
-var _ sync.Locker = (*testLocker)(nil)
-
-func (*testLocker) Lock() {}
-func (*testLocker) Unlock() {}
-
-func TestEntryStaysReachableWhenConfirmationWithRouterFlag(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: true,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.isRouter, true; got != want {
- t.Errorf("got e.isRouter = %t, want = %t", got, want)
- }
- e.nic.mu.ndp.defaultRouters[entryTestAddr1] = defaultRouterState{
- invalidationJob: e.nic.stack.newJob(&testLocker{}, func() {}),
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.isRouter, false; got != want {
- t.Errorf("got e.isRouter = %t, want = %t", got, want)
- }
- if _, ok := e.nic.mu.ndp.defaultRouters[entryTestAddr1]; ok {
- t.Errorf("unexpected defaultRouter for %s", entryTestAddr1)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryStaysReachableWhenProbeWithSameAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleProbeLocked(entryTestLinkAddr1)
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr1; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryReachableToStaleWhenTimeout(t *testing.T) {
- c := DefaultNUDConfigurations()
- // Eliminate random factors from ReachableTime computation so the transition
- // from Stale to Reachable will only take BaseReachableTime duration.
- c.MinRandomFactor = 1
- c.MaxRandomFactor = 1
-
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- clock.advance(c.BaseReachableTime)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryReachableToStaleWhenProbeWithDifferentAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleProbeLocked(entryTestLinkAddr2)
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryReachableToStaleWhenConfirmationWithDifferentAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryReachableToStaleWhenConfirmationWithDifferentAddressAndOverride(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryStaysStaleWhenProbeWithSameAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleProbeLocked(entryTestLinkAddr1)
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr1; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryStaleToReachableWhenSolicitedOverrideConfirmation(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr2; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Reachable,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryStaleToStaleWhenOverrideConfirmation(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr2; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryStaleToStaleWhenProbeUpdateAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleProbeLocked(entryTestLinkAddr2)
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr2; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryStaleToDelay(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryDelayToReachableWhenUpperLevelConfirmation(t *testing.T) {
- c := DefaultNUDConfigurations()
- // Eliminate random factors from ReachableTime computation so the transition
- // from Stale to Reachable will only take BaseReachableTime duration.
- c.MinRandomFactor = 1
- c.MaxRandomFactor = 1
-
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleUpperLevelConfirmationLocked()
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- clock.advance(c.BaseReachableTime)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryDelayToReachableWhenSolicitedOverrideConfirmation(t *testing.T) {
- c := DefaultNUDConfigurations()
- c.MaxMulticastProbes = 1
- // Eliminate random factors from ReachableTime computation so the transition
- // from Stale to Reachable will only take BaseReachableTime duration.
- c.MinRandomFactor = 1
- c.MaxRandomFactor = 1
-
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr2; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- clock.advance(c.BaseReachableTime)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryStaysDelayWhenOverrideConfirmationWithSameAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr1; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryDelayToStaleWhenProbeWithDifferentAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleProbeLocked(entryTestLinkAddr2)
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryDelayToStaleWhenConfirmationWithDifferentAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, _ := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantProbes := []entryTestProbeInfo{
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryDelayToProbe(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- if got, want := e.neigh.State, Delay; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- clock.advance(c.DelayFirstProbeTime)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The second probe is caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryProbeToStaleWhenProbeWithDifferentAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- clock.advance(c.DelayFirstProbeTime)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The second probe is caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- e.mu.Lock()
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleProbeLocked(entryTestLinkAddr2)
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryProbeToStaleWhenConfirmationWithDifferentAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- clock.advance(c.DelayFirstProbeTime)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The second probe is caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- e.mu.Lock()
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Stale; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryStaysProbeWhenOverrideConfirmationWithSameAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- clock.advance(c.DelayFirstProbeTime)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The second probe is caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- e.mu.Lock()
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr1; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-// TestEntryUnknownToStaleToProbeToReachable exercises the following scenario:
-// 1. Probe is received
-// 2. Entry is created in Stale
-// 3. Packet is queued on the entry
-// 4. Entry transitions to Delay then Probe
-// 5. Probe is sent
-func TestEntryUnknownToStaleToProbeToReachable(t *testing.T) {
- c := DefaultNUDConfigurations()
- // Eliminate random factors from ReachableTime computation so the transition
- // from Probe to Reachable will only take BaseReachableTime duration.
- c.MinRandomFactor = 1
- c.MaxRandomFactor = 1
-
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handleProbeLocked(entryTestLinkAddr1)
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- clock.advance(c.DelayFirstProbeTime)
-
- wantProbes := []entryTestProbeInfo{
- // Probe caused by the Delay-to-Probe transition
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- e.mu.Lock()
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr2; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- clock.advance(c.BaseReachableTime)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryProbeToReachableWhenSolicitedOverrideConfirmation(t *testing.T) {
- c := DefaultNUDConfigurations()
- // Eliminate random factors from ReachableTime computation so the transition
- // from Stale to Reachable will only take BaseReachableTime duration.
- c.MinRandomFactor = 1
- c.MaxRandomFactor = 1
-
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- clock.advance(c.DelayFirstProbeTime)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The second probe is caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- e.mu.Lock()
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr2, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: true,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- if got, want := e.neigh.LinkAddr, entryTestLinkAddr2; got != want {
- t.Errorf("got e.neigh.LinkAddr = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- clock.advance(c.BaseReachableTime)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr2,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryProbeToReachableWhenSolicitedConfirmationWithSameAddress(t *testing.T) {
- c := DefaultNUDConfigurations()
- // Eliminate random factors from ReachableTime computation so the transition
- // from Stale to Reachable will only take BaseReachableTime duration.
- c.MinRandomFactor = 1
- c.MaxRandomFactor = 1
-
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- clock.advance(c.DelayFirstProbeTime)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The second probe is caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- e.mu.Lock()
- if got, want := e.neigh.State, Probe; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: true,
- Override: false,
- IsRouter: false,
- })
- if got, want := e.neigh.State, Reachable; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-
- clock.advance(c.BaseReachableTime)
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Reachable,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-}
-
-func TestEntryProbeToFailed(t *testing.T) {
- c := DefaultNUDConfigurations()
- c.MaxMulticastProbes = 3
- c.MaxUnicastProbes = 3
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- waitFor := c.DelayFirstProbeTime + c.RetransmitTimer*time.Duration(c.MaxUnicastProbes)
- clock.advance(waitFor)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The next three probe are caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- {
- EventType: entryTestRemoved,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- e.mu.Lock()
- if got, want := e.neigh.State, Failed; got != want {
- t.Errorf("got e.neigh.State = %q, want = %q", got, want)
- }
- e.mu.Unlock()
-}
-
-func TestEntryFailedGetsDeleted(t *testing.T) {
- c := DefaultNUDConfigurations()
- c.MaxMulticastProbes = 3
- c.MaxUnicastProbes = 3
- e, nudDisp, linkRes, clock := entryTestSetup(c)
-
- // Verify the cache contains the entry.
- if _, ok := e.nic.neigh.cache[entryTestAddr1]; !ok {
- t.Errorf("expected entry %q to exist in the neighbor cache", entryTestAddr1)
- }
-
- e.mu.Lock()
- e.handlePacketQueuedLocked()
- e.handleConfirmationLocked(entryTestLinkAddr1, ReachabilityConfirmationFlags{
- Solicited: false,
- Override: false,
- IsRouter: false,
- })
- e.handlePacketQueuedLocked()
- e.mu.Unlock()
-
- waitFor := c.DelayFirstProbeTime + c.RetransmitTimer*time.Duration(c.MaxUnicastProbes) + c.UnreachableTime
- clock.advance(waitFor)
-
- wantProbes := []entryTestProbeInfo{
- // The first probe is caused by the Unknown-to-Incomplete transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: tcpip.LinkAddress(""),
- LocalAddress: entryTestAddr2,
- },
- // The next three probe are caused by the Delay-to-Probe transition.
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- {
- RemoteAddress: entryTestAddr1,
- RemoteLinkAddress: entryTestLinkAddr1,
- LocalAddress: entryTestAddr2,
- },
- }
- linkRes.mu.Lock()
- diff := cmp.Diff(linkRes.probes, wantProbes)
- linkRes.mu.Unlock()
- if diff != "" {
- t.Fatalf("link address resolver probes mismatch (-got, +want):\n%s", diff)
- }
-
- wantEvents := []testEntryEventInfo{
- {
- EventType: entryTestAdded,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: tcpip.LinkAddress(""),
- State: Incomplete,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Stale,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Delay,
- },
- {
- EventType: entryTestChanged,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- {
- EventType: entryTestRemoved,
- NICID: entryTestNICID,
- Addr: entryTestAddr1,
- LinkAddr: entryTestLinkAddr1,
- State: Probe,
- },
- }
- nudDisp.mu.Lock()
- if diff := cmp.Diff(nudDisp.events, wantEvents, eventDiffOpts()...); diff != "" {
- t.Errorf("nud dispatcher events mismatch (-got, +want):\n%s", diff)
- }
- nudDisp.mu.Unlock()
-
- // Verify the cache no longer contains the entry.
- if _, ok := e.nic.neigh.cache[entryTestAddr1]; ok {
- t.Errorf("entry %q should have been deleted from the neighbor cache", entryTestAddr1)
- }
-}
diff --git a/pkg/tcpip/stack/nic_test.go b/pkg/tcpip/stack/nic_test.go
deleted file mode 100644
index dd6474297..000000000
--- a/pkg/tcpip/stack/nic_test.go
+++ /dev/null
@@ -1,316 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack
-
-import (
- "math"
- "testing"
- "time"
-
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
- "gvisor.dev/gvisor/pkg/tcpip/header"
-)
-
-var _ LinkEndpoint = (*testLinkEndpoint)(nil)
-
-// A LinkEndpoint that throws away outgoing packets.
-//
-// We use this instead of the channel endpoint as the channel package depends on
-// the stack package which this test lives in, causing a cyclic dependency.
-type testLinkEndpoint struct {
- dispatcher NetworkDispatcher
-}
-
-// Attach implements LinkEndpoint.Attach.
-func (e *testLinkEndpoint) Attach(dispatcher NetworkDispatcher) {
- e.dispatcher = dispatcher
-}
-
-// IsAttached implements LinkEndpoint.IsAttached.
-func (e *testLinkEndpoint) IsAttached() bool {
- return e.dispatcher != nil
-}
-
-// MTU implements LinkEndpoint.MTU.
-func (*testLinkEndpoint) MTU() uint32 {
- return math.MaxUint16
-}
-
-// Capabilities implements LinkEndpoint.Capabilities.
-func (*testLinkEndpoint) Capabilities() LinkEndpointCapabilities {
- return CapabilityResolutionRequired
-}
-
-// MaxHeaderLength implements LinkEndpoint.MaxHeaderLength.
-func (*testLinkEndpoint) MaxHeaderLength() uint16 {
- return 0
-}
-
-// LinkAddress returns the link address of this endpoint.
-func (*testLinkEndpoint) LinkAddress() tcpip.LinkAddress {
- return ""
-}
-
-// Wait implements LinkEndpoint.Wait.
-func (*testLinkEndpoint) Wait() {}
-
-// WritePacket implements LinkEndpoint.WritePacket.
-func (e *testLinkEndpoint) WritePacket(*Route, *GSO, tcpip.NetworkProtocolNumber, *PacketBuffer) *tcpip.Error {
- return nil
-}
-
-// WritePackets implements LinkEndpoint.WritePackets.
-func (e *testLinkEndpoint) WritePackets(*Route, *GSO, PacketBufferList, tcpip.NetworkProtocolNumber) (int, *tcpip.Error) {
- // Our tests don't use this so we don't support it.
- return 0, tcpip.ErrNotSupported
-}
-
-// WriteRawPacket implements LinkEndpoint.WriteRawPacket.
-func (e *testLinkEndpoint) WriteRawPacket(buffer.VectorisedView) *tcpip.Error {
- // Our tests don't use this so we don't support it.
- return tcpip.ErrNotSupported
-}
-
-// ARPHardwareType implements stack.LinkEndpoint.ARPHardwareType.
-func (*testLinkEndpoint) ARPHardwareType() header.ARPHardwareType {
- panic("not implemented")
-}
-
-// AddHeader implements stack.LinkEndpoint.AddHeader.
-func (e *testLinkEndpoint) AddHeader(local, remote tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *PacketBuffer) {
- panic("not implemented")
-}
-
-var _ NetworkEndpoint = (*testIPv6Endpoint)(nil)
-
-// An IPv6 NetworkEndpoint that throws away outgoing packets.
-//
-// We use this instead of ipv6.endpoint because the ipv6 package depends on
-// the stack package which this test lives in, causing a cyclic dependency.
-type testIPv6Endpoint struct {
- nicID tcpip.NICID
- linkEP LinkEndpoint
- protocol *testIPv6Protocol
-}
-
-// DefaultTTL implements NetworkEndpoint.DefaultTTL.
-func (*testIPv6Endpoint) DefaultTTL() uint8 {
- return 0
-}
-
-// MTU implements NetworkEndpoint.MTU.
-func (e *testIPv6Endpoint) MTU() uint32 {
- return e.linkEP.MTU() - header.IPv6MinimumSize
-}
-
-// Capabilities implements NetworkEndpoint.Capabilities.
-func (e *testIPv6Endpoint) Capabilities() LinkEndpointCapabilities {
- return e.linkEP.Capabilities()
-}
-
-// MaxHeaderLength implements NetworkEndpoint.MaxHeaderLength.
-func (e *testIPv6Endpoint) MaxHeaderLength() uint16 {
- return e.linkEP.MaxHeaderLength() + header.IPv6MinimumSize
-}
-
-// WritePacket implements NetworkEndpoint.WritePacket.
-func (*testIPv6Endpoint) WritePacket(*Route, *GSO, NetworkHeaderParams, *PacketBuffer) *tcpip.Error {
- return nil
-}
-
-// WritePackets implements NetworkEndpoint.WritePackets.
-func (*testIPv6Endpoint) WritePackets(*Route, *GSO, PacketBufferList, NetworkHeaderParams) (int, *tcpip.Error) {
- // Our tests don't use this so we don't support it.
- return 0, tcpip.ErrNotSupported
-}
-
-// WriteHeaderIncludedPacket implements
-// NetworkEndpoint.WriteHeaderIncludedPacket.
-func (*testIPv6Endpoint) WriteHeaderIncludedPacket(*Route, *PacketBuffer) *tcpip.Error {
- // Our tests don't use this so we don't support it.
- return tcpip.ErrNotSupported
-}
-
-// NICID implements NetworkEndpoint.NICID.
-func (e *testIPv6Endpoint) NICID() tcpip.NICID {
- return e.nicID
-}
-
-// HandlePacket implements NetworkEndpoint.HandlePacket.
-func (*testIPv6Endpoint) HandlePacket(*Route, *PacketBuffer) {
-}
-
-// Close implements NetworkEndpoint.Close.
-func (*testIPv6Endpoint) Close() {}
-
-// NetworkProtocolNumber implements NetworkEndpoint.NetworkProtocolNumber.
-func (*testIPv6Endpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber {
- return header.IPv6ProtocolNumber
-}
-
-var _ NetworkProtocol = (*testIPv6Protocol)(nil)
-
-// An IPv6 NetworkProtocol that supports the bare minimum to make a stack
-// believe it supports IPv6.
-//
-// We use this instead of ipv6.protocol because the ipv6 package depends on
-// the stack package which this test lives in, causing a cyclic dependency.
-type testIPv6Protocol struct{}
-
-// Number implements NetworkProtocol.Number.
-func (*testIPv6Protocol) Number() tcpip.NetworkProtocolNumber {
- return header.IPv6ProtocolNumber
-}
-
-// MinimumPacketSize implements NetworkProtocol.MinimumPacketSize.
-func (*testIPv6Protocol) MinimumPacketSize() int {
- return header.IPv6MinimumSize
-}
-
-// DefaultPrefixLen implements NetworkProtocol.DefaultPrefixLen.
-func (*testIPv6Protocol) DefaultPrefixLen() int {
- return header.IPv6AddressSize * 8
-}
-
-// ParseAddresses implements NetworkProtocol.ParseAddresses.
-func (*testIPv6Protocol) ParseAddresses(v buffer.View) (src, dst tcpip.Address) {
- h := header.IPv6(v)
- return h.SourceAddress(), h.DestinationAddress()
-}
-
-// NewEndpoint implements NetworkProtocol.NewEndpoint.
-func (p *testIPv6Protocol) NewEndpoint(nicID tcpip.NICID, _ LinkAddressCache, _ NUDHandler, _ TransportDispatcher, linkEP LinkEndpoint, _ *Stack) NetworkEndpoint {
- return &testIPv6Endpoint{
- nicID: nicID,
- linkEP: linkEP,
- protocol: p,
- }
-}
-
-// SetOption implements NetworkProtocol.SetOption.
-func (*testIPv6Protocol) SetOption(tcpip.SettableNetworkProtocolOption) *tcpip.Error {
- return nil
-}
-
-// Option implements NetworkProtocol.Option.
-func (*testIPv6Protocol) Option(tcpip.GettableNetworkProtocolOption) *tcpip.Error {
- return nil
-}
-
-// Close implements NetworkProtocol.Close.
-func (*testIPv6Protocol) Close() {}
-
-// Wait implements NetworkProtocol.Wait.
-func (*testIPv6Protocol) Wait() {}
-
-// Parse implements NetworkProtocol.Parse.
-func (*testIPv6Protocol) Parse(*PacketBuffer) (tcpip.TransportProtocolNumber, bool, bool) {
- return 0, false, false
-}
-
-var _ LinkAddressResolver = (*testIPv6Protocol)(nil)
-
-// LinkAddressProtocol implements LinkAddressResolver.
-func (*testIPv6Protocol) LinkAddressProtocol() tcpip.NetworkProtocolNumber {
- return header.IPv6ProtocolNumber
-}
-
-// LinkAddressRequest implements LinkAddressResolver.
-func (*testIPv6Protocol) LinkAddressRequest(_, _ tcpip.Address, _ tcpip.LinkAddress, _ LinkEndpoint) *tcpip.Error {
- return nil
-}
-
-// ResolveStaticAddress implements LinkAddressResolver.
-func (*testIPv6Protocol) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bool) {
- if header.IsV6MulticastAddress(addr) {
- return header.EthernetAddressFromMulticastIPv6Address(addr), true
- }
- return "", false
-}
-
-// Test the race condition where a NIC is removed and an RS timer fires at the
-// same time.
-func TestRemoveNICWhileHandlingRSTimer(t *testing.T) {
- const (
- nicID = 1
-
- maxRtrSolicitations = 5
- )
-
- e := testLinkEndpoint{}
- s := New(Options{
- NetworkProtocols: []NetworkProtocol{&testIPv6Protocol{}},
- NDPConfigs: NDPConfigurations{
- MaxRtrSolicitations: maxRtrSolicitations,
- RtrSolicitationInterval: minimumRtrSolicitationInterval,
- },
- })
-
- if err := s.CreateNIC(nicID, &e); err != nil {
- t.Fatalf("s.CreateNIC(%d, _) = %s", nicID, err)
- }
-
- s.mu.Lock()
- // Wait for the router solicitation timer to fire and block trying to obtain
- // the stack lock when doing link address resolution.
- time.Sleep(minimumRtrSolicitationInterval * 2)
- if err := s.removeNICLocked(nicID); err != nil {
- t.Fatalf("s.removeNICLocked(%d) = %s", nicID, err)
- }
- s.mu.Unlock()
-}
-
-func TestDisabledRxStatsWhenNICDisabled(t *testing.T) {
- // When the NIC is disabled, the only field that matters is the stats field.
- // This test is limited to stats counter checks.
- nic := NIC{
- stats: makeNICStats(),
- }
-
- if got := nic.stats.DisabledRx.Packets.Value(); got != 0 {
- t.Errorf("got DisabledRx.Packets = %d, want = 0", got)
- }
- if got := nic.stats.DisabledRx.Bytes.Value(); got != 0 {
- t.Errorf("got DisabledRx.Bytes = %d, want = 0", got)
- }
- if got := nic.stats.Rx.Packets.Value(); got != 0 {
- t.Errorf("got Rx.Packets = %d, want = 0", got)
- }
- if got := nic.stats.Rx.Bytes.Value(); got != 0 {
- t.Errorf("got Rx.Bytes = %d, want = 0", got)
- }
-
- if t.Failed() {
- t.FailNow()
- }
-
- nic.DeliverNetworkPacket("", "", 0, NewPacketBuffer(PacketBufferOptions{
- Data: buffer.View([]byte{1, 2, 3, 4}).ToVectorisedView(),
- }))
-
- if got := nic.stats.DisabledRx.Packets.Value(); got != 1 {
- t.Errorf("got DisabledRx.Packets = %d, want = 1", got)
- }
- if got := nic.stats.DisabledRx.Bytes.Value(); got != 4 {
- t.Errorf("got DisabledRx.Bytes = %d, want = 4", got)
- }
- if got := nic.stats.Rx.Packets.Value(); got != 0 {
- t.Errorf("got Rx.Packets = %d, want = 0", got)
- }
- if got := nic.stats.Rx.Bytes.Value(); got != 0 {
- t.Errorf("got Rx.Bytes = %d, want = 0", got)
- }
-}
diff --git a/pkg/tcpip/stack/nud_test.go b/pkg/tcpip/stack/nud_test.go
deleted file mode 100644
index 2b97e5972..000000000
--- a/pkg/tcpip/stack/nud_test.go
+++ /dev/null
@@ -1,807 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack_test
-
-import (
- "math"
- "testing"
- "time"
-
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/link/channel"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
- "gvisor.dev/gvisor/pkg/tcpip/stack"
-)
-
-const (
- defaultBaseReachableTime = 30 * time.Second
- minimumBaseReachableTime = time.Millisecond
- defaultMinRandomFactor = 0.5
- defaultMaxRandomFactor = 1.5
- defaultRetransmitTimer = time.Second
- minimumRetransmitTimer = time.Millisecond
- defaultDelayFirstProbeTime = 5 * time.Second
- defaultMaxMulticastProbes = 3
- defaultMaxUnicastProbes = 3
- defaultMaxAnycastDelayTime = time.Second
- defaultMaxReachbilityConfirmations = 3
- defaultUnreachableTime = 5 * time.Second
-
- defaultFakeRandomNum = 0.5
-)
-
-// fakeRand is a deterministic random number generator.
-type fakeRand struct {
- num float32
-}
-
-var _ stack.Rand = (*fakeRand)(nil)
-
-func (f *fakeRand) Float32() float32 {
- return f.num
-}
-
-// TestSetNUDConfigurationFailsForBadNICID tests to make sure we get an error if
-// we attempt to update NUD configurations using an invalid NICID.
-func TestSetNUDConfigurationFailsForBadNICID(t *testing.T) {
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The networking
- // stack will only allocate neighbor caches if a protocol providing link
- // address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- UseNeighborCache: true,
- })
-
- // No NIC with ID 1 yet.
- config := stack.NUDConfigurations{}
- if err := s.SetNUDConfigurations(1, config); err != tcpip.ErrUnknownNICID {
- t.Fatalf("got s.SetNDPConfigurations(1, %+v) = %v, want = %s", config, err, tcpip.ErrUnknownNICID)
- }
-}
-
-// TestNUDConfigurationFailsForNotSupported tests to make sure we get a
-// NotSupported error if we attempt to retrieve NUD configurations when the
-// stack doesn't support NUD.
-//
-// The stack will report to not support NUD if a neighbor cache for a given NIC
-// is not allocated. The networking stack will only allocate neighbor caches if
-// a protocol providing link address resolution is specified (e.g. ARP, IPv6).
-func TestNUDConfigurationFailsForNotSupported(t *testing.T) {
- const nicID = 1
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- NUDConfigs: stack.DefaultNUDConfigurations(),
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- if _, err := s.NUDConfigurations(nicID); err != tcpip.ErrNotSupported {
- t.Fatalf("got s.NDPConfigurations(%d) = %v, want = %s", nicID, err, tcpip.ErrNotSupported)
- }
-}
-
-// TestNUDConfigurationFailsForNotSupported tests to make sure we get a
-// NotSupported error if we attempt to set NUD configurations when the stack
-// doesn't support NUD.
-//
-// The stack will report to not support NUD if a neighbor cache for a given NIC
-// is not allocated. The networking stack will only allocate neighbor caches if
-// a protocol providing link address resolution is specified (e.g. ARP, IPv6).
-func TestSetNUDConfigurationFailsForNotSupported(t *testing.T) {
- const nicID = 1
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- NUDConfigs: stack.DefaultNUDConfigurations(),
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- config := stack.NUDConfigurations{}
- if err := s.SetNUDConfigurations(nicID, config); err != tcpip.ErrNotSupported {
- t.Fatalf("got s.SetNDPConfigurations(%d, %+v) = %v, want = %s", nicID, config, err, tcpip.ErrNotSupported)
- }
-}
-
-// TestDefaultNUDConfigurationIsValid verifies that calling
-// resetInvalidFields() on the result of DefaultNUDConfigurations() does not
-// change anything. DefaultNUDConfigurations() should return a valid
-// NUDConfigurations.
-func TestDefaultNUDConfigurations(t *testing.T) {
- const nicID = 1
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The networking
- // stack will only allocate neighbor caches if a protocol providing link
- // address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: stack.DefaultNUDConfigurations(),
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- c, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got, want := c, stack.DefaultNUDConfigurations(); got != want {
- t.Errorf("got stack.NUDConfigurations(%d) = %+v, want = %+v", nicID, got, want)
- }
-}
-
-func TestNUDConfigurationsBaseReachableTime(t *testing.T) {
- tests := []struct {
- name string
- baseReachableTime time.Duration
- want time.Duration
- }{
- // Invalid cases
- {
- name: "EqualToZero",
- baseReachableTime: 0,
- want: defaultBaseReachableTime,
- },
- // Valid cases
- {
- name: "MoreThanZero",
- baseReachableTime: time.Millisecond,
- want: time.Millisecond,
- },
- {
- name: "MoreThanDefaultBaseReachableTime",
- baseReachableTime: 2 * defaultBaseReachableTime,
- want: 2 * defaultBaseReachableTime,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.BaseReachableTime = test.baseReachableTime
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.BaseReachableTime; got != test.want {
- t.Errorf("got BaseReachableTime = %q, want = %q", got, test.want)
- }
- })
- }
-}
-
-func TestNUDConfigurationsMinRandomFactor(t *testing.T) {
- tests := []struct {
- name string
- minRandomFactor float32
- want float32
- }{
- // Invalid cases
- {
- name: "LessThanZero",
- minRandomFactor: -1,
- want: defaultMinRandomFactor,
- },
- {
- name: "EqualToZero",
- minRandomFactor: 0,
- want: defaultMinRandomFactor,
- },
- // Valid cases
- {
- name: "MoreThanZero",
- minRandomFactor: 1,
- want: 1,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.MinRandomFactor = test.minRandomFactor
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.MinRandomFactor; got != test.want {
- t.Errorf("got MinRandomFactor = %f, want = %f", got, test.want)
- }
- })
- }
-}
-
-func TestNUDConfigurationsMaxRandomFactor(t *testing.T) {
- tests := []struct {
- name string
- minRandomFactor float32
- maxRandomFactor float32
- want float32
- }{
- // Invalid cases
- {
- name: "LessThanZero",
- minRandomFactor: defaultMinRandomFactor,
- maxRandomFactor: -1,
- want: defaultMaxRandomFactor,
- },
- {
- name: "EqualToZero",
- minRandomFactor: defaultMinRandomFactor,
- maxRandomFactor: 0,
- want: defaultMaxRandomFactor,
- },
- {
- name: "LessThanMinRandomFactor",
- minRandomFactor: defaultMinRandomFactor,
- maxRandomFactor: defaultMinRandomFactor * 0.99,
- want: defaultMaxRandomFactor,
- },
- {
- name: "MoreThanMinRandomFactorWhenMinRandomFactorIsLargerThanMaxRandomFactorDefault",
- minRandomFactor: defaultMaxRandomFactor * 2,
- maxRandomFactor: defaultMaxRandomFactor,
- want: defaultMaxRandomFactor * 6,
- },
- // Valid cases
- {
- name: "EqualToMinRandomFactor",
- minRandomFactor: defaultMinRandomFactor,
- maxRandomFactor: defaultMinRandomFactor,
- want: defaultMinRandomFactor,
- },
- {
- name: "MoreThanMinRandomFactor",
- minRandomFactor: defaultMinRandomFactor,
- maxRandomFactor: defaultMinRandomFactor * 1.1,
- want: defaultMinRandomFactor * 1.1,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.MinRandomFactor = test.minRandomFactor
- c.MaxRandomFactor = test.maxRandomFactor
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.MaxRandomFactor; got != test.want {
- t.Errorf("got MaxRandomFactor = %f, want = %f", got, test.want)
- }
- })
- }
-}
-
-func TestNUDConfigurationsRetransmitTimer(t *testing.T) {
- tests := []struct {
- name string
- retransmitTimer time.Duration
- want time.Duration
- }{
- // Invalid cases
- {
- name: "EqualToZero",
- retransmitTimer: 0,
- want: defaultRetransmitTimer,
- },
- {
- name: "LessThanMinimumRetransmitTimer",
- retransmitTimer: minimumRetransmitTimer - time.Nanosecond,
- want: defaultRetransmitTimer,
- },
- // Valid cases
- {
- name: "EqualToMinimumRetransmitTimer",
- retransmitTimer: minimumRetransmitTimer,
- want: minimumBaseReachableTime,
- },
- {
- name: "LargetThanMinimumRetransmitTimer",
- retransmitTimer: 2 * minimumBaseReachableTime,
- want: 2 * minimumBaseReachableTime,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.RetransmitTimer = test.retransmitTimer
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.RetransmitTimer; got != test.want {
- t.Errorf("got RetransmitTimer = %q, want = %q", got, test.want)
- }
- })
- }
-}
-
-func TestNUDConfigurationsDelayFirstProbeTime(t *testing.T) {
- tests := []struct {
- name string
- delayFirstProbeTime time.Duration
- want time.Duration
- }{
- // Invalid cases
- {
- name: "EqualToZero",
- delayFirstProbeTime: 0,
- want: defaultDelayFirstProbeTime,
- },
- // Valid cases
- {
- name: "MoreThanZero",
- delayFirstProbeTime: time.Millisecond,
- want: time.Millisecond,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.DelayFirstProbeTime = test.delayFirstProbeTime
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.DelayFirstProbeTime; got != test.want {
- t.Errorf("got DelayFirstProbeTime = %q, want = %q", got, test.want)
- }
- })
- }
-}
-
-func TestNUDConfigurationsMaxMulticastProbes(t *testing.T) {
- tests := []struct {
- name string
- maxMulticastProbes uint32
- want uint32
- }{
- // Invalid cases
- {
- name: "EqualToZero",
- maxMulticastProbes: 0,
- want: defaultMaxMulticastProbes,
- },
- // Valid cases
- {
- name: "MoreThanZero",
- maxMulticastProbes: 1,
- want: 1,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.MaxMulticastProbes = test.maxMulticastProbes
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.MaxMulticastProbes; got != test.want {
- t.Errorf("got MaxMulticastProbes = %q, want = %q", got, test.want)
- }
- })
- }
-}
-
-func TestNUDConfigurationsMaxUnicastProbes(t *testing.T) {
- tests := []struct {
- name string
- maxUnicastProbes uint32
- want uint32
- }{
- // Invalid cases
- {
- name: "EqualToZero",
- maxUnicastProbes: 0,
- want: defaultMaxUnicastProbes,
- },
- // Valid cases
- {
- name: "MoreThanZero",
- maxUnicastProbes: 1,
- want: 1,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.MaxUnicastProbes = test.maxUnicastProbes
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.MaxUnicastProbes; got != test.want {
- t.Errorf("got MaxUnicastProbes = %q, want = %q", got, test.want)
- }
- })
- }
-}
-
-func TestNUDConfigurationsUnreachableTime(t *testing.T) {
- tests := []struct {
- name string
- unreachableTime time.Duration
- want time.Duration
- }{
- // Invalid cases
- {
- name: "EqualToZero",
- unreachableTime: 0,
- want: defaultUnreachableTime,
- },
- // Valid cases
- {
- name: "MoreThanZero",
- unreachableTime: time.Millisecond,
- want: time.Millisecond,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- const nicID = 1
-
- c := stack.DefaultNUDConfigurations()
- c.UnreachableTime = test.unreachableTime
-
- e := channel.New(0, 1280, linkAddr1)
- e.LinkEPCapabilities |= stack.CapabilityResolutionRequired
-
- s := stack.New(stack.Options{
- // A neighbor cache is required to store NUDConfigurations. The
- // networking stack will only allocate neighbor caches if a protocol
- // providing link address resolution is specified (e.g. ARP or IPv6).
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NUDConfigs: c,
- UseNeighborCache: true,
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- sc, err := s.NUDConfigurations(nicID)
- if err != nil {
- t.Fatalf("got stack.NUDConfigurations(%d) = %s", nicID, err)
- }
- if got := sc.UnreachableTime; got != test.want {
- t.Errorf("got UnreachableTime = %q, want = %q", got, test.want)
- }
- })
- }
-}
-
-// TestNUDStateReachableTime verifies the correctness of the ReachableTime
-// computation.
-func TestNUDStateReachableTime(t *testing.T) {
- tests := []struct {
- name string
- baseReachableTime time.Duration
- minRandomFactor float32
- maxRandomFactor float32
- want time.Duration
- }{
- {
- name: "AllZeros",
- baseReachableTime: 0,
- minRandomFactor: 0,
- maxRandomFactor: 0,
- want: 0,
- },
- {
- name: "ZeroMaxRandomFactor",
- baseReachableTime: time.Second,
- minRandomFactor: 0,
- maxRandomFactor: 0,
- want: 0,
- },
- {
- name: "ZeroMinRandomFactor",
- baseReachableTime: time.Second,
- minRandomFactor: 0,
- maxRandomFactor: 1,
- want: time.Duration(defaultFakeRandomNum * float32(time.Second)),
- },
- {
- name: "FractionalRandomFactor",
- baseReachableTime: time.Duration(math.MaxInt64),
- minRandomFactor: 0.001,
- maxRandomFactor: 0.002,
- want: time.Duration((0.001 + (0.001 * defaultFakeRandomNum)) * float32(math.MaxInt64)),
- },
- {
- name: "MinAndMaxRandomFactorsEqual",
- baseReachableTime: time.Second,
- minRandomFactor: 1,
- maxRandomFactor: 1,
- want: time.Second,
- },
- {
- name: "MinAndMaxRandomFactorsDifferent",
- baseReachableTime: time.Second,
- minRandomFactor: 1,
- maxRandomFactor: 2,
- want: time.Duration((1.0 + defaultFakeRandomNum) * float32(time.Second)),
- },
- {
- name: "MaxInt64",
- baseReachableTime: time.Duration(math.MaxInt64),
- minRandomFactor: 1,
- maxRandomFactor: 1,
- want: time.Duration(math.MaxInt64),
- },
- {
- name: "Overflow",
- baseReachableTime: time.Duration(math.MaxInt64),
- minRandomFactor: 1.5,
- maxRandomFactor: 1.5,
- want: time.Duration(math.MaxInt64),
- },
- {
- name: "DoubleOverflow",
- baseReachableTime: time.Duration(math.MaxInt64),
- minRandomFactor: 2.5,
- maxRandomFactor: 2.5,
- want: time.Duration(math.MaxInt64),
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- c := stack.NUDConfigurations{
- BaseReachableTime: test.baseReachableTime,
- MinRandomFactor: test.minRandomFactor,
- MaxRandomFactor: test.maxRandomFactor,
- }
- // A fake random number generator is used to ensure deterministic
- // results.
- rng := fakeRand{
- num: defaultFakeRandomNum,
- }
- s := stack.NewNUDState(c, &rng)
- if got, want := s.ReachableTime(), test.want; got != want {
- t.Errorf("got ReachableTime = %q, want = %q", got, want)
- }
- })
- }
-}
-
-// TestNUDStateRecomputeReachableTime exercises the ReachableTime function
-// twice to verify recomputation of reachable time when the min random factor,
-// max random factor, or base reachable time changes.
-func TestNUDStateRecomputeReachableTime(t *testing.T) {
- const defaultBase = time.Second
- const defaultMin = 2.0 * defaultMaxRandomFactor
- const defaultMax = 3.0 * defaultMaxRandomFactor
-
- tests := []struct {
- name string
- baseReachableTime time.Duration
- minRandomFactor float32
- maxRandomFactor float32
- want time.Duration
- }{
- {
- name: "BaseReachableTime",
- baseReachableTime: 2 * defaultBase,
- minRandomFactor: defaultMin,
- maxRandomFactor: defaultMax,
- want: time.Duration((defaultMin + (defaultMax-defaultMin)*defaultFakeRandomNum) * float32(2*defaultBase)),
- },
- {
- name: "MinRandomFactor",
- baseReachableTime: defaultBase,
- minRandomFactor: defaultMax,
- maxRandomFactor: defaultMax,
- want: time.Duration(defaultMax * float32(defaultBase)),
- },
- {
- name: "MaxRandomFactor",
- baseReachableTime: defaultBase,
- minRandomFactor: defaultMin,
- maxRandomFactor: defaultMin,
- want: time.Duration(defaultMin * float32(defaultBase)),
- },
- {
- name: "BothRandomFactor",
- baseReachableTime: defaultBase,
- minRandomFactor: 2 * defaultMin,
- maxRandomFactor: 2 * defaultMax,
- want: time.Duration((2*defaultMin + (2*defaultMax-2*defaultMin)*defaultFakeRandomNum) * float32(defaultBase)),
- },
- {
- name: "BaseReachableTimeAndBothRandomFactors",
- baseReachableTime: 2 * defaultBase,
- minRandomFactor: 2 * defaultMin,
- maxRandomFactor: 2 * defaultMax,
- want: time.Duration((2*defaultMin + (2*defaultMax-2*defaultMin)*defaultFakeRandomNum) * float32(2*defaultBase)),
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- c := stack.DefaultNUDConfigurations()
- c.BaseReachableTime = defaultBase
- c.MinRandomFactor = defaultMin
- c.MaxRandomFactor = defaultMax
-
- // A fake random number generator is used to ensure deterministic
- // results.
- rng := fakeRand{
- num: defaultFakeRandomNum,
- }
- s := stack.NewNUDState(c, &rng)
- old := s.ReachableTime()
-
- if got, want := s.ReachableTime(), old; got != want {
- t.Errorf("got ReachableTime = %q, want = %q", got, want)
- }
-
- // Check for recomputation when changing the min random factor, the max
- // random factor, the base reachability time, or any permutation of those
- // three options.
- c.BaseReachableTime = test.baseReachableTime
- c.MinRandomFactor = test.minRandomFactor
- c.MaxRandomFactor = test.maxRandomFactor
- s.SetConfig(c)
-
- if got, want := s.ReachableTime(), test.want; got != want {
- t.Errorf("got ReachableTime = %q, want = %q", got, want)
- }
-
- // Verify that ReachableTime isn't recomputed when none of the
- // configuration options change. The random factor is changed so that if
- // a recompution were to occur, ReachableTime would change.
- rng.num = defaultFakeRandomNum / 2.0
- if got, want := s.ReachableTime(), test.want; got != want {
- t.Errorf("got ReachableTime = %q, want = %q", got, want)
- }
- })
- }
-}
diff --git a/pkg/tcpip/stack/packet_buffer_list.go b/pkg/tcpip/stack/packet_buffer_list.go
new file mode 100644
index 000000000..27f15cb15
--- /dev/null
+++ b/pkg/tcpip/stack/packet_buffer_list.go
@@ -0,0 +1,193 @@
+package stack
+
+// ElementMapper provides an identity mapping by default.
+//
+// This can be replaced to provide a struct that maps elements to linker
+// objects, if they are not the same. An ElementMapper is not typically
+// required if: Linker is left as is, Element is left as is, or Linker and
+// Element are the same type.
+type PacketBufferElementMapper struct{}
+
+// linkerFor maps an Element to a Linker.
+//
+// This default implementation should be inlined.
+//
+//go:nosplit
+func (PacketBufferElementMapper) linkerFor(elem *PacketBuffer) *PacketBuffer { return elem }
+
+// List is an intrusive list. Entries can be added to or removed from the list
+// in O(1) time and with no additional memory allocations.
+//
+// The zero value for List is an empty list ready to use.
+//
+// To iterate over a list (where l is a List):
+// for e := l.Front(); e != nil; e = e.Next() {
+// // do something with e.
+// }
+//
+// +stateify savable
+type PacketBufferList struct {
+ head *PacketBuffer
+ tail *PacketBuffer
+}
+
+// Reset resets list l to the empty state.
+func (l *PacketBufferList) Reset() {
+ l.head = nil
+ l.tail = nil
+}
+
+// Empty returns true iff the list is empty.
+func (l *PacketBufferList) Empty() bool {
+ return l.head == nil
+}
+
+// Front returns the first element of list l or nil.
+func (l *PacketBufferList) Front() *PacketBuffer {
+ return l.head
+}
+
+// Back returns the last element of list l or nil.
+func (l *PacketBufferList) Back() *PacketBuffer {
+ return l.tail
+}
+
+// Len returns the number of elements in the list.
+//
+// NOTE: This is an O(n) operation.
+func (l *PacketBufferList) Len() (count int) {
+ for e := l.Front(); e != nil; e = (PacketBufferElementMapper{}.linkerFor(e)).Next() {
+ count++
+ }
+ return count
+}
+
+// PushFront inserts the element e at the front of list l.
+func (l *PacketBufferList) PushFront(e *PacketBuffer) {
+ linker := PacketBufferElementMapper{}.linkerFor(e)
+ linker.SetNext(l.head)
+ linker.SetPrev(nil)
+ if l.head != nil {
+ PacketBufferElementMapper{}.linkerFor(l.head).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+
+ l.head = e
+}
+
+// PushBack inserts the element e at the back of list l.
+func (l *PacketBufferList) PushBack(e *PacketBuffer) {
+ linker := PacketBufferElementMapper{}.linkerFor(e)
+ linker.SetNext(nil)
+ linker.SetPrev(l.tail)
+ if l.tail != nil {
+ PacketBufferElementMapper{}.linkerFor(l.tail).SetNext(e)
+ } else {
+ l.head = e
+ }
+
+ l.tail = e
+}
+
+// PushBackList inserts list m at the end of list l, emptying m.
+func (l *PacketBufferList) PushBackList(m *PacketBufferList) {
+ if l.head == nil {
+ l.head = m.head
+ l.tail = m.tail
+ } else if m.head != nil {
+ PacketBufferElementMapper{}.linkerFor(l.tail).SetNext(m.head)
+ PacketBufferElementMapper{}.linkerFor(m.head).SetPrev(l.tail)
+
+ l.tail = m.tail
+ }
+ m.head = nil
+ m.tail = nil
+}
+
+// InsertAfter inserts e after b.
+func (l *PacketBufferList) InsertAfter(b, e *PacketBuffer) {
+ bLinker := PacketBufferElementMapper{}.linkerFor(b)
+ eLinker := PacketBufferElementMapper{}.linkerFor(e)
+
+ a := bLinker.Next()
+
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ bLinker.SetNext(e)
+
+ if a != nil {
+ PacketBufferElementMapper{}.linkerFor(a).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+}
+
+// InsertBefore inserts e before a.
+func (l *PacketBufferList) InsertBefore(a, e *PacketBuffer) {
+ aLinker := PacketBufferElementMapper{}.linkerFor(a)
+ eLinker := PacketBufferElementMapper{}.linkerFor(e)
+
+ b := aLinker.Prev()
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ aLinker.SetPrev(e)
+
+ if b != nil {
+ PacketBufferElementMapper{}.linkerFor(b).SetNext(e)
+ } else {
+ l.head = e
+ }
+}
+
+// Remove removes e from l.
+func (l *PacketBufferList) Remove(e *PacketBuffer) {
+ linker := PacketBufferElementMapper{}.linkerFor(e)
+ prev := linker.Prev()
+ next := linker.Next()
+
+ if prev != nil {
+ PacketBufferElementMapper{}.linkerFor(prev).SetNext(next)
+ } else if l.head == e {
+ l.head = next
+ }
+
+ if next != nil {
+ PacketBufferElementMapper{}.linkerFor(next).SetPrev(prev)
+ } else if l.tail == e {
+ l.tail = prev
+ }
+
+ linker.SetNext(nil)
+ linker.SetPrev(nil)
+}
+
+// Entry is a default implementation of Linker. Users can add anonymous fields
+// of this type to their structs to make them automatically implement the
+// methods needed by List.
+//
+// +stateify savable
+type PacketBufferEntry struct {
+ next *PacketBuffer
+ prev *PacketBuffer
+}
+
+// Next returns the entry that follows e in the list.
+func (e *PacketBufferEntry) Next() *PacketBuffer {
+ return e.next
+}
+
+// Prev returns the entry that precedes e in the list.
+func (e *PacketBufferEntry) Prev() *PacketBuffer {
+ return e.prev
+}
+
+// SetNext assigns 'entry' as the entry that follows e in the list.
+func (e *PacketBufferEntry) SetNext(elem *PacketBuffer) {
+ e.next = elem
+}
+
+// SetPrev assigns 'entry' as the entry that precedes e in the list.
+func (e *PacketBufferEntry) SetPrev(elem *PacketBuffer) {
+ e.prev = elem
+}
diff --git a/pkg/tcpip/stack/packet_buffer_test.go b/pkg/tcpip/stack/packet_buffer_test.go
deleted file mode 100644
index c6fa8da5f..000000000
--- a/pkg/tcpip/stack/packet_buffer_test.go
+++ /dev/null
@@ -1,397 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at //
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack
-
-import (
- "bytes"
- "testing"
-
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
-)
-
-func TestPacketHeaderPush(t *testing.T) {
- for _, test := range []struct {
- name string
- reserved int
- link []byte
- network []byte
- transport []byte
- data []byte
- }{
- {
- name: "construct empty packet",
- },
- {
- name: "construct link header only packet",
- reserved: 60,
- link: makeView(10),
- },
- {
- name: "construct link and network header only packet",
- reserved: 60,
- link: makeView(10),
- network: makeView(20),
- },
- {
- name: "construct header only packet",
- reserved: 60,
- link: makeView(10),
- network: makeView(20),
- transport: makeView(30),
- },
- {
- name: "construct data only packet",
- data: makeView(40),
- },
- {
- name: "construct L3 packet",
- reserved: 60,
- network: makeView(20),
- transport: makeView(30),
- data: makeView(40),
- },
- {
- name: "construct L2 packet",
- reserved: 60,
- link: makeView(10),
- network: makeView(20),
- transport: makeView(30),
- data: makeView(40),
- },
- } {
- t.Run(test.name, func(t *testing.T) {
- pk := NewPacketBuffer(PacketBufferOptions{
- ReserveHeaderBytes: test.reserved,
- // Make a copy of data to make sure our truth data won't be taint by
- // PacketBuffer.
- Data: buffer.NewViewFromBytes(test.data).ToVectorisedView(),
- })
-
- allHdrSize := len(test.link) + len(test.network) + len(test.transport)
-
- // Check the initial values for packet.
- checkInitialPacketBuffer(t, pk, PacketBufferOptions{
- ReserveHeaderBytes: test.reserved,
- Data: buffer.View(test.data).ToVectorisedView(),
- })
-
- // Push headers.
- if v := test.transport; len(v) > 0 {
- copy(pk.TransportHeader().Push(len(v)), v)
- }
- if v := test.network; len(v) > 0 {
- copy(pk.NetworkHeader().Push(len(v)), v)
- }
- if v := test.link; len(v) > 0 {
- copy(pk.LinkHeader().Push(len(v)), v)
- }
-
- // Check the after values for packet.
- if got, want := pk.ReservedHeaderBytes(), test.reserved; got != want {
- t.Errorf("After pk.ReservedHeaderBytes() = %d, want %d", got, want)
- }
- if got, want := pk.AvailableHeaderBytes(), test.reserved-allHdrSize; got != want {
- t.Errorf("After pk.AvailableHeaderBytes() = %d, want %d", got, want)
- }
- if got, want := pk.HeaderSize(), allHdrSize; got != want {
- t.Errorf("After pk.HeaderSize() = %d, want %d", got, want)
- }
- if got, want := pk.Size(), allHdrSize+len(test.data); got != want {
- t.Errorf("After pk.Size() = %d, want %d", got, want)
- }
- checkViewEqual(t, "After pk.Data.Views()", concatViews(pk.Data.Views()...), test.data)
- checkViewEqual(t, "After pk.Views()", concatViews(pk.Views()...),
- concatViews(test.link, test.network, test.transport, test.data))
- // Check the after values for each header.
- checkPacketHeader(t, "After pk.LinkHeader", pk.LinkHeader(), test.link)
- checkPacketHeader(t, "After pk.NetworkHeader", pk.NetworkHeader(), test.network)
- checkPacketHeader(t, "After pk.TransportHeader", pk.TransportHeader(), test.transport)
- // Check the after values for PayloadSince.
- checkViewEqual(t, "After PayloadSince(LinkHeader)",
- PayloadSince(pk.LinkHeader()),
- concatViews(test.link, test.network, test.transport, test.data))
- checkViewEqual(t, "After PayloadSince(NetworkHeader)",
- PayloadSince(pk.NetworkHeader()),
- concatViews(test.network, test.transport, test.data))
- checkViewEqual(t, "After PayloadSince(TransportHeader)",
- PayloadSince(pk.TransportHeader()),
- concatViews(test.transport, test.data))
- })
- }
-}
-
-func TestPacketHeaderConsume(t *testing.T) {
- for _, test := range []struct {
- name string
- data []byte
- link int
- network int
- transport int
- }{
- {
- name: "parse L2 packet",
- data: concatViews(makeView(10), makeView(20), makeView(30), makeView(40)),
- link: 10,
- network: 20,
- transport: 30,
- },
- {
- name: "parse L3 packet",
- data: concatViews(makeView(20), makeView(30), makeView(40)),
- network: 20,
- transport: 30,
- },
- } {
- t.Run(test.name, func(t *testing.T) {
- pk := NewPacketBuffer(PacketBufferOptions{
- // Make a copy of data to make sure our truth data won't be taint by
- // PacketBuffer.
- Data: buffer.NewViewFromBytes(test.data).ToVectorisedView(),
- })
-
- // Check the initial values for packet.
- checkInitialPacketBuffer(t, pk, PacketBufferOptions{
- Data: buffer.View(test.data).ToVectorisedView(),
- })
-
- // Consume headers.
- if size := test.link; size > 0 {
- if _, ok := pk.LinkHeader().Consume(size); !ok {
- t.Fatalf("pk.LinkHeader().Consume() = false, want true")
- }
- }
- if size := test.network; size > 0 {
- if _, ok := pk.NetworkHeader().Consume(size); !ok {
- t.Fatalf("pk.NetworkHeader().Consume() = false, want true")
- }
- }
- if size := test.transport; size > 0 {
- if _, ok := pk.TransportHeader().Consume(size); !ok {
- t.Fatalf("pk.TransportHeader().Consume() = false, want true")
- }
- }
-
- allHdrSize := test.link + test.network + test.transport
-
- // Check the after values for packet.
- if got, want := pk.ReservedHeaderBytes(), 0; got != want {
- t.Errorf("After pk.ReservedHeaderBytes() = %d, want %d", got, want)
- }
- if got, want := pk.AvailableHeaderBytes(), 0; got != want {
- t.Errorf("After pk.AvailableHeaderBytes() = %d, want %d", got, want)
- }
- if got, want := pk.HeaderSize(), allHdrSize; got != want {
- t.Errorf("After pk.HeaderSize() = %d, want %d", got, want)
- }
- if got, want := pk.Size(), len(test.data); got != want {
- t.Errorf("After pk.Size() = %d, want %d", got, want)
- }
- // After state of pk.
- var (
- link = test.data[:test.link]
- network = test.data[test.link:][:test.network]
- transport = test.data[test.link+test.network:][:test.transport]
- payload = test.data[allHdrSize:]
- )
- checkViewEqual(t, "After pk.Data.Views()", concatViews(pk.Data.Views()...), payload)
- checkViewEqual(t, "After pk.Views()", concatViews(pk.Views()...), test.data)
- // Check the after values for each header.
- checkPacketHeader(t, "After pk.LinkHeader", pk.LinkHeader(), link)
- checkPacketHeader(t, "After pk.NetworkHeader", pk.NetworkHeader(), network)
- checkPacketHeader(t, "After pk.TransportHeader", pk.TransportHeader(), transport)
- // Check the after values for PayloadSince.
- checkViewEqual(t, "After PayloadSince(LinkHeader)",
- PayloadSince(pk.LinkHeader()),
- concatViews(link, network, transport, payload))
- checkViewEqual(t, "After PayloadSince(NetworkHeader)",
- PayloadSince(pk.NetworkHeader()),
- concatViews(network, transport, payload))
- checkViewEqual(t, "After PayloadSince(TransportHeader)",
- PayloadSince(pk.TransportHeader()),
- concatViews(transport, payload))
- })
- }
-}
-
-func TestPacketHeaderConsumeDataTooShort(t *testing.T) {
- data := makeView(10)
-
- pk := NewPacketBuffer(PacketBufferOptions{
- // Make a copy of data to make sure our truth data won't be taint by
- // PacketBuffer.
- Data: buffer.NewViewFromBytes(data).ToVectorisedView(),
- })
-
- // Consume should fail if pkt.Data is too short.
- if _, ok := pk.LinkHeader().Consume(11); ok {
- t.Fatalf("pk.LinkHeader().Consume() = _, true; want _, false")
- }
- if _, ok := pk.NetworkHeader().Consume(11); ok {
- t.Fatalf("pk.NetworkHeader().Consume() = _, true; want _, false")
- }
- if _, ok := pk.TransportHeader().Consume(11); ok {
- t.Fatalf("pk.TransportHeader().Consume() = _, true; want _, false")
- }
-
- // Check packet should look the same as initial packet.
- checkInitialPacketBuffer(t, pk, PacketBufferOptions{
- Data: buffer.View(data).ToVectorisedView(),
- })
-}
-
-func TestPacketHeaderPushCalledAtMostOnce(t *testing.T) {
- const headerSize = 10
-
- pk := NewPacketBuffer(PacketBufferOptions{
- ReserveHeaderBytes: headerSize * int(numHeaderType),
- })
-
- for _, h := range []PacketHeader{
- pk.TransportHeader(),
- pk.NetworkHeader(),
- pk.LinkHeader(),
- } {
- t.Run("PushedTwice/"+h.typ.String(), func(t *testing.T) {
- h.Push(headerSize)
-
- defer func() { recover() }()
- h.Push(headerSize)
- t.Fatal("Second push should have panicked")
- })
- }
-}
-
-func TestPacketHeaderConsumeCalledAtMostOnce(t *testing.T) {
- const headerSize = 10
-
- pk := NewPacketBuffer(PacketBufferOptions{
- Data: makeView(headerSize * int(numHeaderType)).ToVectorisedView(),
- })
-
- for _, h := range []PacketHeader{
- pk.LinkHeader(),
- pk.NetworkHeader(),
- pk.TransportHeader(),
- } {
- t.Run("ConsumedTwice/"+h.typ.String(), func(t *testing.T) {
- if _, ok := h.Consume(headerSize); !ok {
- t.Fatal("First consume should succeed")
- }
-
- defer func() { recover() }()
- h.Consume(headerSize)
- t.Fatal("Second consume should have panicked")
- })
- }
-}
-
-func TestPacketHeaderPushThenConsumePanics(t *testing.T) {
- const headerSize = 10
-
- pk := NewPacketBuffer(PacketBufferOptions{
- ReserveHeaderBytes: headerSize * int(numHeaderType),
- })
-
- for _, h := range []PacketHeader{
- pk.TransportHeader(),
- pk.NetworkHeader(),
- pk.LinkHeader(),
- } {
- t.Run(h.typ.String(), func(t *testing.T) {
- h.Push(headerSize)
-
- defer func() { recover() }()
- h.Consume(headerSize)
- t.Fatal("Consume should have panicked")
- })
- }
-}
-
-func TestPacketHeaderConsumeThenPushPanics(t *testing.T) {
- const headerSize = 10
-
- pk := NewPacketBuffer(PacketBufferOptions{
- Data: makeView(headerSize * int(numHeaderType)).ToVectorisedView(),
- })
-
- for _, h := range []PacketHeader{
- pk.LinkHeader(),
- pk.NetworkHeader(),
- pk.TransportHeader(),
- } {
- t.Run(h.typ.String(), func(t *testing.T) {
- h.Consume(headerSize)
-
- defer func() { recover() }()
- h.Push(headerSize)
- t.Fatal("Push should have panicked")
- })
- }
-}
-
-func checkInitialPacketBuffer(t *testing.T, pk *PacketBuffer, opts PacketBufferOptions) {
- t.Helper()
- reserved := opts.ReserveHeaderBytes
- if got, want := pk.ReservedHeaderBytes(), reserved; got != want {
- t.Errorf("Initial pk.ReservedHeaderBytes() = %d, want %d", got, want)
- }
- if got, want := pk.AvailableHeaderBytes(), reserved; got != want {
- t.Errorf("Initial pk.AvailableHeaderBytes() = %d, want %d", got, want)
- }
- if got, want := pk.HeaderSize(), 0; got != want {
- t.Errorf("Initial pk.HeaderSize() = %d, want %d", got, want)
- }
- data := opts.Data.ToView()
- if got, want := pk.Size(), len(data); got != want {
- t.Errorf("Initial pk.Size() = %d, want %d", got, want)
- }
- checkViewEqual(t, "Initial pk.Data.Views()", concatViews(pk.Data.Views()...), data)
- checkViewEqual(t, "Initial pk.Views()", concatViews(pk.Views()...), data)
- // Check the initial values for each header.
- checkPacketHeader(t, "Initial pk.LinkHeader", pk.LinkHeader(), nil)
- checkPacketHeader(t, "Initial pk.NetworkHeader", pk.NetworkHeader(), nil)
- checkPacketHeader(t, "Initial pk.TransportHeader", pk.TransportHeader(), nil)
- // Check the initial valies for PayloadSince.
- checkViewEqual(t, "Initial PayloadSince(LinkHeader)",
- PayloadSince(pk.LinkHeader()), data)
- checkViewEqual(t, "Initial PayloadSince(NetworkHeader)",
- PayloadSince(pk.NetworkHeader()), data)
- checkViewEqual(t, "Initial PayloadSince(TransportHeader)",
- PayloadSince(pk.TransportHeader()), data)
-}
-
-func checkPacketHeader(t *testing.T, name string, h PacketHeader, want []byte) {
- t.Helper()
- checkViewEqual(t, name+".View()", h.View(), want)
-}
-
-func checkViewEqual(t *testing.T, what string, got, want buffer.View) {
- t.Helper()
- if !bytes.Equal(got, want) {
- t.Errorf("%s = %x, want %x", what, got, want)
- }
-}
-
-func makeView(size int) buffer.View {
- b := byte(size)
- return bytes.Repeat([]byte{b}, size)
-}
-
-func concatViews(views ...buffer.View) buffer.View {
- var all buffer.View
- for _, v := range views {
- all = append(all, v...)
- }
- return all
-}
diff --git a/pkg/tcpip/stack/stack_state_autogen.go b/pkg/tcpip/stack/stack_state_autogen.go
new file mode 100644
index 000000000..eee587e3f
--- /dev/null
+++ b/pkg/tcpip/stack/stack_state_autogen.go
@@ -0,0 +1,720 @@
+// automatically generated by stateify.
+
+package stack
+
+import (
+ "gvisor.dev/gvisor/pkg/state"
+)
+
+func (x *tuple) StateTypeName() string {
+ return "pkg/tcpip/stack.tuple"
+}
+
+func (x *tuple) StateFields() []string {
+ return []string{
+ "tupleEntry",
+ "tupleID",
+ "conn",
+ "direction",
+ }
+}
+
+func (x *tuple) beforeSave() {}
+
+func (x *tuple) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.tupleEntry)
+ m.Save(1, &x.tupleID)
+ m.Save(2, &x.conn)
+ m.Save(3, &x.direction)
+}
+
+func (x *tuple) afterLoad() {}
+
+func (x *tuple) StateLoad(m state.Source) {
+ m.Load(0, &x.tupleEntry)
+ m.Load(1, &x.tupleID)
+ m.Load(2, &x.conn)
+ m.Load(3, &x.direction)
+}
+
+func (x *tupleID) StateTypeName() string {
+ return "pkg/tcpip/stack.tupleID"
+}
+
+func (x *tupleID) StateFields() []string {
+ return []string{
+ "srcAddr",
+ "srcPort",
+ "dstAddr",
+ "dstPort",
+ "transProto",
+ "netProto",
+ }
+}
+
+func (x *tupleID) beforeSave() {}
+
+func (x *tupleID) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.srcAddr)
+ m.Save(1, &x.srcPort)
+ m.Save(2, &x.dstAddr)
+ m.Save(3, &x.dstPort)
+ m.Save(4, &x.transProto)
+ m.Save(5, &x.netProto)
+}
+
+func (x *tupleID) afterLoad() {}
+
+func (x *tupleID) StateLoad(m state.Source) {
+ m.Load(0, &x.srcAddr)
+ m.Load(1, &x.srcPort)
+ m.Load(2, &x.dstAddr)
+ m.Load(3, &x.dstPort)
+ m.Load(4, &x.transProto)
+ m.Load(5, &x.netProto)
+}
+
+func (x *conn) StateTypeName() string {
+ return "pkg/tcpip/stack.conn"
+}
+
+func (x *conn) StateFields() []string {
+ return []string{
+ "original",
+ "reply",
+ "manip",
+ "tcbHook",
+ "tcb",
+ "lastUsed",
+ }
+}
+
+func (x *conn) beforeSave() {}
+
+func (x *conn) StateSave(m state.Sink) {
+ x.beforeSave()
+ var lastUsed unixTime = x.saveLastUsed()
+ m.SaveValue(5, lastUsed)
+ m.Save(0, &x.original)
+ m.Save(1, &x.reply)
+ m.Save(2, &x.manip)
+ m.Save(3, &x.tcbHook)
+ m.Save(4, &x.tcb)
+}
+
+func (x *conn) afterLoad() {}
+
+func (x *conn) StateLoad(m state.Source) {
+ m.Load(0, &x.original)
+ m.Load(1, &x.reply)
+ m.Load(2, &x.manip)
+ m.Load(3, &x.tcbHook)
+ m.Load(4, &x.tcb)
+ m.LoadValue(5, new(unixTime), func(y interface{}) { x.loadLastUsed(y.(unixTime)) })
+}
+
+func (x *ConnTrack) StateTypeName() string {
+ return "pkg/tcpip/stack.ConnTrack"
+}
+
+func (x *ConnTrack) StateFields() []string {
+ return []string{
+ "seed",
+ "buckets",
+ }
+}
+
+func (x *ConnTrack) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.seed)
+ m.Save(1, &x.buckets)
+}
+
+func (x *ConnTrack) afterLoad() {}
+
+func (x *ConnTrack) StateLoad(m state.Source) {
+ m.Load(0, &x.seed)
+ m.Load(1, &x.buckets)
+}
+
+func (x *bucket) StateTypeName() string {
+ return "pkg/tcpip/stack.bucket"
+}
+
+func (x *bucket) StateFields() []string {
+ return []string{
+ "tuples",
+ }
+}
+
+func (x *bucket) beforeSave() {}
+
+func (x *bucket) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.tuples)
+}
+
+func (x *bucket) afterLoad() {}
+
+func (x *bucket) StateLoad(m state.Source) {
+ m.Load(0, &x.tuples)
+}
+
+func (x *unixTime) StateTypeName() string {
+ return "pkg/tcpip/stack.unixTime"
+}
+
+func (x *unixTime) StateFields() []string {
+ return []string{
+ "second",
+ "nano",
+ }
+}
+
+func (x *unixTime) beforeSave() {}
+
+func (x *unixTime) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.second)
+ m.Save(1, &x.nano)
+}
+
+func (x *unixTime) afterLoad() {}
+
+func (x *unixTime) StateLoad(m state.Source) {
+ m.Load(0, &x.second)
+ m.Load(1, &x.nano)
+}
+
+func (x *IPTables) StateTypeName() string {
+ return "pkg/tcpip/stack.IPTables"
+}
+
+func (x *IPTables) StateFields() []string {
+ return []string{
+ "mu",
+ "tables",
+ "priorities",
+ "modified",
+ "connections",
+ "reaperDone",
+ }
+}
+
+func (x *IPTables) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.mu)
+ m.Save(1, &x.tables)
+ m.Save(2, &x.priorities)
+ m.Save(3, &x.modified)
+ m.Save(4, &x.connections)
+ m.Save(5, &x.reaperDone)
+}
+
+func (x *IPTables) StateLoad(m state.Source) {
+ m.Load(0, &x.mu)
+ m.Load(1, &x.tables)
+ m.Load(2, &x.priorities)
+ m.Load(3, &x.modified)
+ m.Load(4, &x.connections)
+ m.Load(5, &x.reaperDone)
+ m.AfterLoad(x.afterLoad)
+}
+
+func (x *Table) StateTypeName() string {
+ return "pkg/tcpip/stack.Table"
+}
+
+func (x *Table) StateFields() []string {
+ return []string{
+ "Rules",
+ "BuiltinChains",
+ "Underflows",
+ }
+}
+
+func (x *Table) beforeSave() {}
+
+func (x *Table) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.Rules)
+ m.Save(1, &x.BuiltinChains)
+ m.Save(2, &x.Underflows)
+}
+
+func (x *Table) afterLoad() {}
+
+func (x *Table) StateLoad(m state.Source) {
+ m.Load(0, &x.Rules)
+ m.Load(1, &x.BuiltinChains)
+ m.Load(2, &x.Underflows)
+}
+
+func (x *Rule) StateTypeName() string {
+ return "pkg/tcpip/stack.Rule"
+}
+
+func (x *Rule) StateFields() []string {
+ return []string{
+ "Filter",
+ "Matchers",
+ "Target",
+ }
+}
+
+func (x *Rule) beforeSave() {}
+
+func (x *Rule) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.Filter)
+ m.Save(1, &x.Matchers)
+ m.Save(2, &x.Target)
+}
+
+func (x *Rule) afterLoad() {}
+
+func (x *Rule) StateLoad(m state.Source) {
+ m.Load(0, &x.Filter)
+ m.Load(1, &x.Matchers)
+ m.Load(2, &x.Target)
+}
+
+func (x *IPHeaderFilter) StateTypeName() string {
+ return "pkg/tcpip/stack.IPHeaderFilter"
+}
+
+func (x *IPHeaderFilter) StateFields() []string {
+ return []string{
+ "Protocol",
+ "CheckProtocol",
+ "Dst",
+ "DstMask",
+ "DstInvert",
+ "Src",
+ "SrcMask",
+ "SrcInvert",
+ "OutputInterface",
+ "OutputInterfaceMask",
+ "OutputInterfaceInvert",
+ }
+}
+
+func (x *IPHeaderFilter) beforeSave() {}
+
+func (x *IPHeaderFilter) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.Protocol)
+ m.Save(1, &x.CheckProtocol)
+ m.Save(2, &x.Dst)
+ m.Save(3, &x.DstMask)
+ m.Save(4, &x.DstInvert)
+ m.Save(5, &x.Src)
+ m.Save(6, &x.SrcMask)
+ m.Save(7, &x.SrcInvert)
+ m.Save(8, &x.OutputInterface)
+ m.Save(9, &x.OutputInterfaceMask)
+ m.Save(10, &x.OutputInterfaceInvert)
+}
+
+func (x *IPHeaderFilter) afterLoad() {}
+
+func (x *IPHeaderFilter) StateLoad(m state.Source) {
+ m.Load(0, &x.Protocol)
+ m.Load(1, &x.CheckProtocol)
+ m.Load(2, &x.Dst)
+ m.Load(3, &x.DstMask)
+ m.Load(4, &x.DstInvert)
+ m.Load(5, &x.Src)
+ m.Load(6, &x.SrcMask)
+ m.Load(7, &x.SrcInvert)
+ m.Load(8, &x.OutputInterface)
+ m.Load(9, &x.OutputInterfaceMask)
+ m.Load(10, &x.OutputInterfaceInvert)
+}
+
+func (x *linkAddrEntryList) StateTypeName() string {
+ return "pkg/tcpip/stack.linkAddrEntryList"
+}
+
+func (x *linkAddrEntryList) StateFields() []string {
+ return []string{
+ "head",
+ "tail",
+ }
+}
+
+func (x *linkAddrEntryList) beforeSave() {}
+
+func (x *linkAddrEntryList) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.head)
+ m.Save(1, &x.tail)
+}
+
+func (x *linkAddrEntryList) afterLoad() {}
+
+func (x *linkAddrEntryList) StateLoad(m state.Source) {
+ m.Load(0, &x.head)
+ m.Load(1, &x.tail)
+}
+
+func (x *linkAddrEntryEntry) StateTypeName() string {
+ return "pkg/tcpip/stack.linkAddrEntryEntry"
+}
+
+func (x *linkAddrEntryEntry) StateFields() []string {
+ return []string{
+ "next",
+ "prev",
+ }
+}
+
+func (x *linkAddrEntryEntry) beforeSave() {}
+
+func (x *linkAddrEntryEntry) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.next)
+ m.Save(1, &x.prev)
+}
+
+func (x *linkAddrEntryEntry) afterLoad() {}
+
+func (x *linkAddrEntryEntry) StateLoad(m state.Source) {
+ m.Load(0, &x.next)
+ m.Load(1, &x.prev)
+}
+
+func (x *neighborEntryList) StateTypeName() string {
+ return "pkg/tcpip/stack.neighborEntryList"
+}
+
+func (x *neighborEntryList) StateFields() []string {
+ return []string{
+ "head",
+ "tail",
+ }
+}
+
+func (x *neighborEntryList) beforeSave() {}
+
+func (x *neighborEntryList) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.head)
+ m.Save(1, &x.tail)
+}
+
+func (x *neighborEntryList) afterLoad() {}
+
+func (x *neighborEntryList) StateLoad(m state.Source) {
+ m.Load(0, &x.head)
+ m.Load(1, &x.tail)
+}
+
+func (x *neighborEntryEntry) StateTypeName() string {
+ return "pkg/tcpip/stack.neighborEntryEntry"
+}
+
+func (x *neighborEntryEntry) StateFields() []string {
+ return []string{
+ "next",
+ "prev",
+ }
+}
+
+func (x *neighborEntryEntry) beforeSave() {}
+
+func (x *neighborEntryEntry) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.next)
+ m.Save(1, &x.prev)
+}
+
+func (x *neighborEntryEntry) afterLoad() {}
+
+func (x *neighborEntryEntry) StateLoad(m state.Source) {
+ m.Load(0, &x.next)
+ m.Load(1, &x.prev)
+}
+
+func (x *PacketBufferList) StateTypeName() string {
+ return "pkg/tcpip/stack.PacketBufferList"
+}
+
+func (x *PacketBufferList) StateFields() []string {
+ return []string{
+ "head",
+ "tail",
+ }
+}
+
+func (x *PacketBufferList) beforeSave() {}
+
+func (x *PacketBufferList) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.head)
+ m.Save(1, &x.tail)
+}
+
+func (x *PacketBufferList) afterLoad() {}
+
+func (x *PacketBufferList) StateLoad(m state.Source) {
+ m.Load(0, &x.head)
+ m.Load(1, &x.tail)
+}
+
+func (x *PacketBufferEntry) StateTypeName() string {
+ return "pkg/tcpip/stack.PacketBufferEntry"
+}
+
+func (x *PacketBufferEntry) StateFields() []string {
+ return []string{
+ "next",
+ "prev",
+ }
+}
+
+func (x *PacketBufferEntry) beforeSave() {}
+
+func (x *PacketBufferEntry) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.next)
+ m.Save(1, &x.prev)
+}
+
+func (x *PacketBufferEntry) afterLoad() {}
+
+func (x *PacketBufferEntry) StateLoad(m state.Source) {
+ m.Load(0, &x.next)
+ m.Load(1, &x.prev)
+}
+
+func (x *TransportEndpointID) StateTypeName() string {
+ return "pkg/tcpip/stack.TransportEndpointID"
+}
+
+func (x *TransportEndpointID) StateFields() []string {
+ return []string{
+ "LocalPort",
+ "LocalAddress",
+ "RemotePort",
+ "RemoteAddress",
+ }
+}
+
+func (x *TransportEndpointID) beforeSave() {}
+
+func (x *TransportEndpointID) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.LocalPort)
+ m.Save(1, &x.LocalAddress)
+ m.Save(2, &x.RemotePort)
+ m.Save(3, &x.RemoteAddress)
+}
+
+func (x *TransportEndpointID) afterLoad() {}
+
+func (x *TransportEndpointID) StateLoad(m state.Source) {
+ m.Load(0, &x.LocalPort)
+ m.Load(1, &x.LocalAddress)
+ m.Load(2, &x.RemotePort)
+ m.Load(3, &x.RemoteAddress)
+}
+
+func (x *GSOType) StateTypeName() string {
+ return "pkg/tcpip/stack.GSOType"
+}
+
+func (x *GSOType) StateFields() []string {
+ return nil
+}
+
+func (x *GSO) StateTypeName() string {
+ return "pkg/tcpip/stack.GSO"
+}
+
+func (x *GSO) StateFields() []string {
+ return []string{
+ "Type",
+ "NeedsCsum",
+ "CsumOffset",
+ "MSS",
+ "L3HdrLen",
+ "MaxSize",
+ }
+}
+
+func (x *GSO) beforeSave() {}
+
+func (x *GSO) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.Type)
+ m.Save(1, &x.NeedsCsum)
+ m.Save(2, &x.CsumOffset)
+ m.Save(3, &x.MSS)
+ m.Save(4, &x.L3HdrLen)
+ m.Save(5, &x.MaxSize)
+}
+
+func (x *GSO) afterLoad() {}
+
+func (x *GSO) StateLoad(m state.Source) {
+ m.Load(0, &x.Type)
+ m.Load(1, &x.NeedsCsum)
+ m.Load(2, &x.CsumOffset)
+ m.Load(3, &x.MSS)
+ m.Load(4, &x.L3HdrLen)
+ m.Load(5, &x.MaxSize)
+}
+
+func (x *TransportEndpointInfo) StateTypeName() string {
+ return "pkg/tcpip/stack.TransportEndpointInfo"
+}
+
+func (x *TransportEndpointInfo) StateFields() []string {
+ return []string{
+ "NetProto",
+ "TransProto",
+ "ID",
+ "BindNICID",
+ "BindAddr",
+ "RegisterNICID",
+ }
+}
+
+func (x *TransportEndpointInfo) beforeSave() {}
+
+func (x *TransportEndpointInfo) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.NetProto)
+ m.Save(1, &x.TransProto)
+ m.Save(2, &x.ID)
+ m.Save(3, &x.BindNICID)
+ m.Save(4, &x.BindAddr)
+ m.Save(5, &x.RegisterNICID)
+}
+
+func (x *TransportEndpointInfo) afterLoad() {}
+
+func (x *TransportEndpointInfo) StateLoad(m state.Source) {
+ m.Load(0, &x.NetProto)
+ m.Load(1, &x.TransProto)
+ m.Load(2, &x.ID)
+ m.Load(3, &x.BindNICID)
+ m.Load(4, &x.BindAddr)
+ m.Load(5, &x.RegisterNICID)
+}
+
+func (x *multiPortEndpoint) StateTypeName() string {
+ return "pkg/tcpip/stack.multiPortEndpoint"
+}
+
+func (x *multiPortEndpoint) StateFields() []string {
+ return []string{
+ "demux",
+ "netProto",
+ "transProto",
+ "endpoints",
+ "flags",
+ }
+}
+
+func (x *multiPortEndpoint) beforeSave() {}
+
+func (x *multiPortEndpoint) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.demux)
+ m.Save(1, &x.netProto)
+ m.Save(2, &x.transProto)
+ m.Save(3, &x.endpoints)
+ m.Save(4, &x.flags)
+}
+
+func (x *multiPortEndpoint) afterLoad() {}
+
+func (x *multiPortEndpoint) StateLoad(m state.Source) {
+ m.Load(0, &x.demux)
+ m.Load(1, &x.netProto)
+ m.Load(2, &x.transProto)
+ m.Load(3, &x.endpoints)
+ m.Load(4, &x.flags)
+}
+
+func (x *tupleList) StateTypeName() string {
+ return "pkg/tcpip/stack.tupleList"
+}
+
+func (x *tupleList) StateFields() []string {
+ return []string{
+ "head",
+ "tail",
+ }
+}
+
+func (x *tupleList) beforeSave() {}
+
+func (x *tupleList) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.head)
+ m.Save(1, &x.tail)
+}
+
+func (x *tupleList) afterLoad() {}
+
+func (x *tupleList) StateLoad(m state.Source) {
+ m.Load(0, &x.head)
+ m.Load(1, &x.tail)
+}
+
+func (x *tupleEntry) StateTypeName() string {
+ return "pkg/tcpip/stack.tupleEntry"
+}
+
+func (x *tupleEntry) StateFields() []string {
+ return []string{
+ "next",
+ "prev",
+ }
+}
+
+func (x *tupleEntry) beforeSave() {}
+
+func (x *tupleEntry) StateSave(m state.Sink) {
+ x.beforeSave()
+ m.Save(0, &x.next)
+ m.Save(1, &x.prev)
+}
+
+func (x *tupleEntry) afterLoad() {}
+
+func (x *tupleEntry) StateLoad(m state.Source) {
+ m.Load(0, &x.next)
+ m.Load(1, &x.prev)
+}
+
+func init() {
+ state.Register((*tuple)(nil))
+ state.Register((*tupleID)(nil))
+ state.Register((*conn)(nil))
+ state.Register((*ConnTrack)(nil))
+ state.Register((*bucket)(nil))
+ state.Register((*unixTime)(nil))
+ state.Register((*IPTables)(nil))
+ state.Register((*Table)(nil))
+ state.Register((*Rule)(nil))
+ state.Register((*IPHeaderFilter)(nil))
+ state.Register((*linkAddrEntryList)(nil))
+ state.Register((*linkAddrEntryEntry)(nil))
+ state.Register((*neighborEntryList)(nil))
+ state.Register((*neighborEntryEntry)(nil))
+ state.Register((*PacketBufferList)(nil))
+ state.Register((*PacketBufferEntry)(nil))
+ state.Register((*TransportEndpointID)(nil))
+ state.Register((*GSOType)(nil))
+ state.Register((*GSO)(nil))
+ state.Register((*TransportEndpointInfo)(nil))
+ state.Register((*multiPortEndpoint)(nil))
+ state.Register((*tupleList)(nil))
+ state.Register((*tupleEntry)(nil))
+}
diff --git a/pkg/tcpip/stack/stack_test.go b/pkg/tcpip/stack/stack_test.go
deleted file mode 100644
index 60b54c244..000000000
--- a/pkg/tcpip/stack/stack_test.go
+++ /dev/null
@@ -1,3501 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package stack_test contains tests for the stack. It is in its own package so
-// that the tests can also validate that all definitions needed to implement
-// transport and network protocols are properly exported by the stack package.
-package stack_test
-
-import (
- "bytes"
- "fmt"
- "math"
- "net"
- "sort"
- "testing"
- "time"
-
- "github.com/google/go-cmp/cmp"
- "github.com/google/go-cmp/cmp/cmpopts"
- "gvisor.dev/gvisor/pkg/rand"
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
- "gvisor.dev/gvisor/pkg/tcpip/header"
- "gvisor.dev/gvisor/pkg/tcpip/link/channel"
- "gvisor.dev/gvisor/pkg/tcpip/link/loopback"
- "gvisor.dev/gvisor/pkg/tcpip/network/arp"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
- "gvisor.dev/gvisor/pkg/tcpip/stack"
- "gvisor.dev/gvisor/pkg/tcpip/transport/udp"
-)
-
-const (
- fakeNetNumber tcpip.NetworkProtocolNumber = math.MaxUint32
- fakeNetHeaderLen = 12
- fakeDefaultPrefixLen = 8
-
- // fakeControlProtocol is used for control packets that represent
- // destination port unreachable.
- fakeControlProtocol tcpip.TransportProtocolNumber = 2
-
- // defaultMTU is the MTU, in bytes, used throughout the tests, except
- // where another value is explicitly used. It is chosen to match the MTU
- // of loopback interfaces on linux systems.
- defaultMTU = 65536
-
- dstAddrOffset = 0
- srcAddrOffset = 1
- protocolNumberOffset = 2
-)
-
-// fakeNetworkEndpoint is a network-layer protocol endpoint. It counts sent and
-// received packets; the counts of all endpoints are aggregated in the protocol
-// descriptor.
-//
-// Headers of this protocol are fakeNetHeaderLen bytes, but we currently only
-// use the first three: destination address, source address, and transport
-// protocol. They're all one byte fields to simplify parsing.
-type fakeNetworkEndpoint struct {
- nicID tcpip.NICID
- proto *fakeNetworkProtocol
- dispatcher stack.TransportDispatcher
- ep stack.LinkEndpoint
-}
-
-func (f *fakeNetworkEndpoint) MTU() uint32 {
- return f.ep.MTU() - uint32(f.MaxHeaderLength())
-}
-
-func (f *fakeNetworkEndpoint) NICID() tcpip.NICID {
- return f.nicID
-}
-
-func (*fakeNetworkEndpoint) DefaultTTL() uint8 {
- return 123
-}
-
-func (f *fakeNetworkEndpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
- // Increment the received packet count in the protocol descriptor.
- f.proto.packetCount[int(r.LocalAddress[0])%len(f.proto.packetCount)]++
-
- // Handle control packets.
- if pkt.NetworkHeader().View()[protocolNumberOffset] == uint8(fakeControlProtocol) {
- nb, ok := pkt.Data.PullUp(fakeNetHeaderLen)
- if !ok {
- return
- }
- pkt.Data.TrimFront(fakeNetHeaderLen)
- f.dispatcher.DeliverTransportControlPacket(
- tcpip.Address(nb[srcAddrOffset:srcAddrOffset+1]),
- tcpip.Address(nb[dstAddrOffset:dstAddrOffset+1]),
- fakeNetNumber,
- tcpip.TransportProtocolNumber(nb[protocolNumberOffset]),
- stack.ControlPortUnreachable, 0, pkt)
- return
- }
-
- // Dispatch the packet to the transport protocol.
- f.dispatcher.DeliverTransportPacket(r, tcpip.TransportProtocolNumber(pkt.NetworkHeader().View()[protocolNumberOffset]), pkt)
-}
-
-func (f *fakeNetworkEndpoint) MaxHeaderLength() uint16 {
- return f.ep.MaxHeaderLength() + fakeNetHeaderLen
-}
-
-func (f *fakeNetworkEndpoint) PseudoHeaderChecksum(protocol tcpip.TransportProtocolNumber, dstAddr tcpip.Address) uint16 {
- return 0
-}
-
-func (f *fakeNetworkEndpoint) Capabilities() stack.LinkEndpointCapabilities {
- return f.ep.Capabilities()
-}
-
-func (f *fakeNetworkEndpoint) NetworkProtocolNumber() tcpip.NetworkProtocolNumber {
- return f.proto.Number()
-}
-
-func (f *fakeNetworkEndpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.NetworkHeaderParams, pkt *stack.PacketBuffer) *tcpip.Error {
- // Increment the sent packet count in the protocol descriptor.
- f.proto.sendPacketCount[int(r.RemoteAddress[0])%len(f.proto.sendPacketCount)]++
-
- // Add the protocol's header to the packet and send it to the link
- // endpoint.
- hdr := pkt.NetworkHeader().Push(fakeNetHeaderLen)
- hdr[dstAddrOffset] = r.RemoteAddress[0]
- hdr[srcAddrOffset] = r.LocalAddress[0]
- hdr[protocolNumberOffset] = byte(params.Protocol)
-
- if r.Loop&stack.PacketLoop != 0 {
- f.HandlePacket(r, pkt)
- }
- if r.Loop&stack.PacketOut == 0 {
- return nil
- }
-
- return f.ep.WritePacket(r, gso, fakeNetNumber, pkt)
-}
-
-// WritePackets implements stack.LinkEndpoint.WritePackets.
-func (f *fakeNetworkEndpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.PacketBufferList, params stack.NetworkHeaderParams) (int, *tcpip.Error) {
- panic("not implemented")
-}
-
-func (*fakeNetworkEndpoint) WriteHeaderIncludedPacket(r *stack.Route, pkt *stack.PacketBuffer) *tcpip.Error {
- return tcpip.ErrNotSupported
-}
-
-func (*fakeNetworkEndpoint) Close() {}
-
-// fakeNetworkProtocol is a network-layer protocol descriptor. It aggregates the
-// number of packets sent and received via endpoints of this protocol. The index
-// where packets are added is given by the packet's destination address MOD 10.
-type fakeNetworkProtocol struct {
- packetCount [10]int
- sendPacketCount [10]int
- defaultTTL uint8
-}
-
-func (f *fakeNetworkProtocol) Number() tcpip.NetworkProtocolNumber {
- return fakeNetNumber
-}
-
-func (f *fakeNetworkProtocol) MinimumPacketSize() int {
- return fakeNetHeaderLen
-}
-
-func (f *fakeNetworkProtocol) DefaultPrefixLen() int {
- return fakeDefaultPrefixLen
-}
-
-func (f *fakeNetworkProtocol) PacketCount(intfAddr byte) int {
- return f.packetCount[int(intfAddr)%len(f.packetCount)]
-}
-
-func (*fakeNetworkProtocol) ParseAddresses(v buffer.View) (src, dst tcpip.Address) {
- return tcpip.Address(v[srcAddrOffset : srcAddrOffset+1]), tcpip.Address(v[dstAddrOffset : dstAddrOffset+1])
-}
-
-func (f *fakeNetworkProtocol) NewEndpoint(nicID tcpip.NICID, _ stack.LinkAddressCache, _ stack.NUDHandler, dispatcher stack.TransportDispatcher, ep stack.LinkEndpoint, _ *stack.Stack) stack.NetworkEndpoint {
- return &fakeNetworkEndpoint{
- nicID: nicID,
- proto: f,
- dispatcher: dispatcher,
- ep: ep,
- }
-}
-
-func (f *fakeNetworkProtocol) SetOption(option tcpip.SettableNetworkProtocolOption) *tcpip.Error {
- switch v := option.(type) {
- case *tcpip.DefaultTTLOption:
- f.defaultTTL = uint8(*v)
- return nil
- default:
- return tcpip.ErrUnknownProtocolOption
- }
-}
-
-func (f *fakeNetworkProtocol) Option(option tcpip.GettableNetworkProtocolOption) *tcpip.Error {
- switch v := option.(type) {
- case *tcpip.DefaultTTLOption:
- *v = tcpip.DefaultTTLOption(f.defaultTTL)
- return nil
- default:
- return tcpip.ErrUnknownProtocolOption
- }
-}
-
-// Close implements TransportProtocol.Close.
-func (*fakeNetworkProtocol) Close() {}
-
-// Wait implements TransportProtocol.Wait.
-func (*fakeNetworkProtocol) Wait() {}
-
-// Parse implements TransportProtocol.Parse.
-func (*fakeNetworkProtocol) Parse(pkt *stack.PacketBuffer) (tcpip.TransportProtocolNumber, bool, bool) {
- hdr, ok := pkt.NetworkHeader().Consume(fakeNetHeaderLen)
- if !ok {
- return 0, false, false
- }
- return tcpip.TransportProtocolNumber(hdr[protocolNumberOffset]), true, true
-}
-
-func fakeNetFactory() stack.NetworkProtocol {
- return &fakeNetworkProtocol{}
-}
-
-// linkEPWithMockedAttach is a stack.LinkEndpoint that tests can use to verify
-// that LinkEndpoint.Attach was called.
-type linkEPWithMockedAttach struct {
- stack.LinkEndpoint
- attached bool
-}
-
-// Attach implements stack.LinkEndpoint.Attach.
-func (l *linkEPWithMockedAttach) Attach(d stack.NetworkDispatcher) {
- l.LinkEndpoint.Attach(d)
- l.attached = d != nil
-}
-
-func (l *linkEPWithMockedAttach) isAttached() bool {
- return l.attached
-}
-
-// Checks to see if list contains an address.
-func containsAddr(list []tcpip.ProtocolAddress, item tcpip.ProtocolAddress) bool {
- for _, i := range list {
- if i == item {
- return true
- }
- }
-
- return false
-}
-
-func TestNetworkReceive(t *testing.T) {
- // Create a stack with the fake network protocol, one nic, and two
- // addresses attached to it: 1 & 2.
- ep := channel.New(10, defaultMTU, "")
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x02"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- fakeNet := s.NetworkProtocolInstance(fakeNetNumber).(*fakeNetworkProtocol)
-
- buf := buffer.NewView(30)
-
- // Make sure packet with wrong address is not delivered.
- buf[dstAddrOffset] = 3
- ep.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeNet.packetCount[1] != 0 {
- t.Errorf("packetCount[1] = %d, want %d", fakeNet.packetCount[1], 0)
- }
- if fakeNet.packetCount[2] != 0 {
- t.Errorf("packetCount[2] = %d, want %d", fakeNet.packetCount[2], 0)
- }
-
- // Make sure packet is delivered to first endpoint.
- buf[dstAddrOffset] = 1
- ep.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeNet.packetCount[1] != 1 {
- t.Errorf("packetCount[1] = %d, want %d", fakeNet.packetCount[1], 1)
- }
- if fakeNet.packetCount[2] != 0 {
- t.Errorf("packetCount[2] = %d, want %d", fakeNet.packetCount[2], 0)
- }
-
- // Make sure packet is delivered to second endpoint.
- buf[dstAddrOffset] = 2
- ep.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeNet.packetCount[1] != 1 {
- t.Errorf("packetCount[1] = %d, want %d", fakeNet.packetCount[1], 1)
- }
- if fakeNet.packetCount[2] != 1 {
- t.Errorf("packetCount[2] = %d, want %d", fakeNet.packetCount[2], 1)
- }
-
- // Make sure packet is not delivered if protocol number is wrong.
- ep.InjectInbound(fakeNetNumber-1, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeNet.packetCount[1] != 1 {
- t.Errorf("packetCount[1] = %d, want %d", fakeNet.packetCount[1], 1)
- }
- if fakeNet.packetCount[2] != 1 {
- t.Errorf("packetCount[2] = %d, want %d", fakeNet.packetCount[2], 1)
- }
-
- // Make sure packet that is too small is dropped.
- buf.CapLength(2)
- ep.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeNet.packetCount[1] != 1 {
- t.Errorf("packetCount[1] = %d, want %d", fakeNet.packetCount[1], 1)
- }
- if fakeNet.packetCount[2] != 1 {
- t.Errorf("packetCount[2] = %d, want %d", fakeNet.packetCount[2], 1)
- }
-}
-
-func sendTo(s *stack.Stack, addr tcpip.Address, payload buffer.View) *tcpip.Error {
- r, err := s.FindRoute(0, "", addr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- return err
- }
- defer r.Release()
- return send(r, payload)
-}
-
-func send(r stack.Route, payload buffer.View) *tcpip.Error {
- return r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: fakeTransNumber, TTL: 123, TOS: stack.DefaultTOS}, stack.NewPacketBuffer(stack.PacketBufferOptions{
- ReserveHeaderBytes: int(r.MaxHeaderLength()),
- Data: payload.ToVectorisedView(),
- }))
-}
-
-func testSendTo(t *testing.T, s *stack.Stack, addr tcpip.Address, ep *channel.Endpoint, payload buffer.View) {
- t.Helper()
- ep.Drain()
- if err := sendTo(s, addr, payload); err != nil {
- t.Error("sendTo failed:", err)
- }
- if got, want := ep.Drain(), 1; got != want {
- t.Errorf("sendTo packet count: got = %d, want %d", got, want)
- }
-}
-
-func testSend(t *testing.T, r stack.Route, ep *channel.Endpoint, payload buffer.View) {
- t.Helper()
- ep.Drain()
- if err := send(r, payload); err != nil {
- t.Error("send failed:", err)
- }
- if got, want := ep.Drain(), 1; got != want {
- t.Errorf("send packet count: got = %d, want %d", got, want)
- }
-}
-
-func testFailingSend(t *testing.T, r stack.Route, ep *channel.Endpoint, payload buffer.View, wantErr *tcpip.Error) {
- t.Helper()
- if gotErr := send(r, payload); gotErr != wantErr {
- t.Errorf("send failed: got = %s, want = %s ", gotErr, wantErr)
- }
-}
-
-func testFailingSendTo(t *testing.T, s *stack.Stack, addr tcpip.Address, ep *channel.Endpoint, payload buffer.View, wantErr *tcpip.Error) {
- t.Helper()
- if gotErr := sendTo(s, addr, payload); gotErr != wantErr {
- t.Errorf("sendto failed: got = %s, want = %s ", gotErr, wantErr)
- }
-}
-
-func testRecv(t *testing.T, fakeNet *fakeNetworkProtocol, localAddrByte byte, ep *channel.Endpoint, buf buffer.View) {
- t.Helper()
- // testRecvInternal injects one packet, and we expect to receive it.
- want := fakeNet.PacketCount(localAddrByte) + 1
- testRecvInternal(t, fakeNet, localAddrByte, ep, buf, want)
-}
-
-func testFailingRecv(t *testing.T, fakeNet *fakeNetworkProtocol, localAddrByte byte, ep *channel.Endpoint, buf buffer.View) {
- t.Helper()
- // testRecvInternal injects one packet, and we do NOT expect to receive it.
- want := fakeNet.PacketCount(localAddrByte)
- testRecvInternal(t, fakeNet, localAddrByte, ep, buf, want)
-}
-
-func testRecvInternal(t *testing.T, fakeNet *fakeNetworkProtocol, localAddrByte byte, ep *channel.Endpoint, buf buffer.View, want int) {
- t.Helper()
- ep.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if got := fakeNet.PacketCount(localAddrByte); got != want {
- t.Errorf("receive packet count: got = %d, want %d", got, want)
- }
-}
-
-func TestNetworkSend(t *testing.T) {
- // Create a stack with the fake network protocol, one nic, and one
- // address: 1. The route table sends all packets through the only
- // existing nic.
- ep := channel.New(10, defaultMTU, "")
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("NewNIC failed:", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- // Make sure that the link-layer endpoint received the outbound packet.
- testSendTo(t, s, "\x03", ep, nil)
-}
-
-func TestNetworkSendMultiRoute(t *testing.T) {
- // Create a stack with the fake network protocol, two nics, and two
- // addresses per nic, the first nic has odd address, the second one has
- // even addresses.
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep1 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep1); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x03"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- ep2 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(2, ep2); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- if err := s.AddAddress(2, fakeNetNumber, "\x02"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- if err := s.AddAddress(2, fakeNetNumber, "\x04"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- // Set a route table that sends all packets with odd destination
- // addresses through the first NIC, and all even destination address
- // through the second one.
- {
- subnet0, err := tcpip.NewSubnet("\x00", "\x01")
- if err != nil {
- t.Fatal(err)
- }
- subnet1, err := tcpip.NewSubnet("\x01", "\x01")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{
- {Destination: subnet1, Gateway: "\x00", NIC: 1},
- {Destination: subnet0, Gateway: "\x00", NIC: 2},
- })
- }
-
- // Send a packet to an odd destination.
- testSendTo(t, s, "\x05", ep1, nil)
-
- // Send a packet to an even destination.
- testSendTo(t, s, "\x06", ep2, nil)
-}
-
-func testRoute(t *testing.T, s *stack.Stack, nic tcpip.NICID, srcAddr, dstAddr, expectedSrcAddr tcpip.Address) {
- r, err := s.FindRoute(nic, srcAddr, dstAddr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatal("FindRoute failed:", err)
- }
-
- defer r.Release()
-
- if r.LocalAddress != expectedSrcAddr {
- t.Fatalf("Bad source address: expected %v, got %v", expectedSrcAddr, r.LocalAddress)
- }
-
- if r.RemoteAddress != dstAddr {
- t.Fatalf("Bad destination address: expected %v, got %v", dstAddr, r.RemoteAddress)
- }
-}
-
-func testNoRoute(t *testing.T, s *stack.Stack, nic tcpip.NICID, srcAddr, dstAddr tcpip.Address) {
- _, err := s.FindRoute(nic, srcAddr, dstAddr, fakeNetNumber, false /* multicastLoop */)
- if err != tcpip.ErrNoRoute {
- t.Fatalf("FindRoute returned unexpected error, got = %v, want = %s", err, tcpip.ErrNoRoute)
- }
-}
-
-// TestAttachToLinkEndpointImmediately tests that a LinkEndpoint is attached to
-// a NetworkDispatcher when the NIC is created.
-func TestAttachToLinkEndpointImmediately(t *testing.T) {
- const nicID = 1
-
- tests := []struct {
- name string
- nicOpts stack.NICOptions
- }{
- {
- name: "Create enabled NIC",
- nicOpts: stack.NICOptions{Disabled: false},
- },
- {
- name: "Create disabled NIC",
- nicOpts: stack.NICOptions{Disabled: true},
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- e := linkEPWithMockedAttach{
- LinkEndpoint: loopback.New(),
- }
-
- if err := s.CreateNICWithOptions(nicID, &e, test.nicOpts); err != nil {
- t.Fatalf("CreateNICWithOptions(%d, _, %+v) = %s", nicID, test.nicOpts, err)
- }
- if !e.isAttached() {
- t.Fatal("link endpoint not attached to a network dispatcher")
- }
- })
- }
-}
-
-func TestDisableUnknownNIC(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- if err := s.DisableNIC(1); err != tcpip.ErrUnknownNICID {
- t.Fatalf("got s.DisableNIC(1) = %v, want = %s", err, tcpip.ErrUnknownNICID)
- }
-}
-
-func TestDisabledNICsNICInfoAndCheckNIC(t *testing.T) {
- const nicID = 1
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- e := loopback.New()
- nicOpts := stack.NICOptions{Disabled: true}
- if err := s.CreateNICWithOptions(nicID, e, nicOpts); err != nil {
- t.Fatalf("CreateNICWithOptions(%d, _, %+v) = %s", nicID, nicOpts, err)
- }
-
- checkNIC := func(enabled bool) {
- t.Helper()
-
- allNICInfo := s.NICInfo()
- nicInfo, ok := allNICInfo[nicID]
- if !ok {
- t.Errorf("entry for %d missing from allNICInfo = %+v", nicID, allNICInfo)
- } else if nicInfo.Flags.Running != enabled {
- t.Errorf("got nicInfo.Flags.Running = %t, want = %t", nicInfo.Flags.Running, enabled)
- }
-
- if got := s.CheckNIC(nicID); got != enabled {
- t.Errorf("got s.CheckNIC(%d) = %t, want = %t", nicID, got, enabled)
- }
- }
-
- // NIC should initially report itself as disabled.
- checkNIC(false)
-
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
- checkNIC(true)
-
- // If the NIC is not reporting a correct enabled status, we cannot trust the
- // next check so end the test here.
- if t.Failed() {
- t.FailNow()
- }
-
- if err := s.DisableNIC(nicID); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID, err)
- }
- checkNIC(false)
-}
-
-func TestRemoveUnknownNIC(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- if err := s.RemoveNIC(1); err != tcpip.ErrUnknownNICID {
- t.Fatalf("got s.RemoveNIC(1) = %v, want = %s", err, tcpip.ErrUnknownNICID)
- }
-}
-
-func TestRemoveNIC(t *testing.T) {
- const nicID = 1
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- e := linkEPWithMockedAttach{
- LinkEndpoint: loopback.New(),
- }
- if err := s.CreateNIC(nicID, &e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- // NIC should be present in NICInfo and attached to a NetworkDispatcher.
- allNICInfo := s.NICInfo()
- if _, ok := allNICInfo[nicID]; !ok {
- t.Errorf("entry for %d missing from allNICInfo = %+v", nicID, allNICInfo)
- }
- if !e.isAttached() {
- t.Fatal("link endpoint not attached to a network dispatcher")
- }
-
- // Removing a NIC should remove it from NICInfo and e should be detached from
- // the NetworkDispatcher.
- if err := s.RemoveNIC(nicID); err != nil {
- t.Fatalf("s.RemoveNIC(%d): %s", nicID, err)
- }
- if nicInfo, ok := s.NICInfo()[nicID]; ok {
- t.Errorf("got unexpected NICInfo entry for deleted NIC %d = %+v", nicID, nicInfo)
- }
- if e.isAttached() {
- t.Error("link endpoint for removed NIC still attached to a network dispatcher")
- }
-}
-
-func TestRouteWithDownNIC(t *testing.T) {
- tests := []struct {
- name string
- downFn func(s *stack.Stack, nicID tcpip.NICID) *tcpip.Error
- upFn func(s *stack.Stack, nicID tcpip.NICID) *tcpip.Error
- }{
- {
- name: "Disabled NIC",
- downFn: (*stack.Stack).DisableNIC,
- upFn: (*stack.Stack).EnableNIC,
- },
-
- // Once a NIC is removed, it cannot be brought up.
- {
- name: "Removed NIC",
- downFn: (*stack.Stack).RemoveNIC,
- },
- }
-
- const unspecifiedNIC = 0
- const nicID1 = 1
- const nicID2 = 2
- const addr1 = tcpip.Address("\x01")
- const addr2 = tcpip.Address("\x02")
- const nic1Dst = tcpip.Address("\x05")
- const nic2Dst = tcpip.Address("\x06")
-
- setup := func(t *testing.T) (*stack.Stack, *channel.Endpoint, *channel.Endpoint) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep1 := channel.New(1, defaultMTU, "")
- if err := s.CreateNIC(nicID1, ep1); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID1, err)
- }
-
- if err := s.AddAddress(nicID1, fakeNetNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s): %s", nicID1, fakeNetNumber, addr1, err)
- }
-
- ep2 := channel.New(1, defaultMTU, "")
- if err := s.CreateNIC(nicID2, ep2); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID2, err)
- }
-
- if err := s.AddAddress(nicID2, fakeNetNumber, addr2); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s): %s", nicID2, fakeNetNumber, addr2, err)
- }
-
- // Set a route table that sends all packets with odd destination
- // addresses through the first NIC, and all even destination address
- // through the second one.
- {
- subnet0, err := tcpip.NewSubnet("\x00", "\x01")
- if err != nil {
- t.Fatal(err)
- }
- subnet1, err := tcpip.NewSubnet("\x01", "\x01")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{
- {Destination: subnet1, Gateway: "\x00", NIC: nicID1},
- {Destination: subnet0, Gateway: "\x00", NIC: nicID2},
- })
- }
-
- return s, ep1, ep2
- }
-
- // Tests that routes through a down NIC are not used when looking up a route
- // for a destination.
- t.Run("Find", func(t *testing.T) {
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- s, _, _ := setup(t)
-
- // Test routes to odd address.
- testRoute(t, s, unspecifiedNIC, "", "\x05", addr1)
- testRoute(t, s, unspecifiedNIC, addr1, "\x05", addr1)
- testRoute(t, s, nicID1, addr1, "\x05", addr1)
-
- // Test routes to even address.
- testRoute(t, s, unspecifiedNIC, "", "\x06", addr2)
- testRoute(t, s, unspecifiedNIC, addr2, "\x06", addr2)
- testRoute(t, s, nicID2, addr2, "\x06", addr2)
-
- // Bringing NIC1 down should result in no routes to odd addresses. Routes to
- // even addresses should continue to be available as NIC2 is still up.
- if err := test.downFn(s, nicID1); err != nil {
- t.Fatalf("test.downFn(_, %d): %s", nicID1, err)
- }
- testNoRoute(t, s, unspecifiedNIC, "", nic1Dst)
- testNoRoute(t, s, unspecifiedNIC, addr1, nic1Dst)
- testNoRoute(t, s, nicID1, addr1, nic1Dst)
- testRoute(t, s, unspecifiedNIC, "", nic2Dst, addr2)
- testRoute(t, s, unspecifiedNIC, addr2, nic2Dst, addr2)
- testRoute(t, s, nicID2, addr2, nic2Dst, addr2)
-
- // Bringing NIC2 down should result in no routes to even addresses. No
- // route should be available to any address as routes to odd addresses
- // were made unavailable by bringing NIC1 down above.
- if err := test.downFn(s, nicID2); err != nil {
- t.Fatalf("test.downFn(_, %d): %s", nicID2, err)
- }
- testNoRoute(t, s, unspecifiedNIC, "", nic1Dst)
- testNoRoute(t, s, unspecifiedNIC, addr1, nic1Dst)
- testNoRoute(t, s, nicID1, addr1, nic1Dst)
- testNoRoute(t, s, unspecifiedNIC, "", nic2Dst)
- testNoRoute(t, s, unspecifiedNIC, addr2, nic2Dst)
- testNoRoute(t, s, nicID2, addr2, nic2Dst)
-
- if upFn := test.upFn; upFn != nil {
- // Bringing NIC1 up should make routes to odd addresses available
- // again. Routes to even addresses should continue to be unavailable
- // as NIC2 is still down.
- if err := upFn(s, nicID1); err != nil {
- t.Fatalf("test.upFn(_, %d): %s", nicID1, err)
- }
- testRoute(t, s, unspecifiedNIC, "", nic1Dst, addr1)
- testRoute(t, s, unspecifiedNIC, addr1, nic1Dst, addr1)
- testRoute(t, s, nicID1, addr1, nic1Dst, addr1)
- testNoRoute(t, s, unspecifiedNIC, "", nic2Dst)
- testNoRoute(t, s, unspecifiedNIC, addr2, nic2Dst)
- testNoRoute(t, s, nicID2, addr2, nic2Dst)
- }
- })
- }
- })
-
- // Tests that writing a packet using a Route through a down NIC fails.
- t.Run("WritePacket", func(t *testing.T) {
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- s, ep1, ep2 := setup(t)
-
- r1, err := s.FindRoute(nicID1, addr1, nic1Dst, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Errorf("FindRoute(%d, %s, %s, %d, false): %s", nicID1, addr1, nic1Dst, fakeNetNumber, err)
- }
- defer r1.Release()
-
- r2, err := s.FindRoute(nicID2, addr2, nic2Dst, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Errorf("FindRoute(%d, %s, %s, %d, false): %s", nicID2, addr2, nic2Dst, fakeNetNumber, err)
- }
- defer r2.Release()
-
- // If we failed to get routes r1 or r2, we cannot proceed with the test.
- if t.Failed() {
- t.FailNow()
- }
-
- buf := buffer.View([]byte{1})
- testSend(t, r1, ep1, buf)
- testSend(t, r2, ep2, buf)
-
- // Writes with Routes that use NIC1 after being brought down should fail.
- if err := test.downFn(s, nicID1); err != nil {
- t.Fatalf("test.downFn(_, %d): %s", nicID1, err)
- }
- testFailingSend(t, r1, ep1, buf, tcpip.ErrInvalidEndpointState)
- testSend(t, r2, ep2, buf)
-
- // Writes with Routes that use NIC2 after being brought down should fail.
- if err := test.downFn(s, nicID2); err != nil {
- t.Fatalf("test.downFn(_, %d): %s", nicID2, err)
- }
- testFailingSend(t, r1, ep1, buf, tcpip.ErrInvalidEndpointState)
- testFailingSend(t, r2, ep2, buf, tcpip.ErrInvalidEndpointState)
-
- if upFn := test.upFn; upFn != nil {
- // Writes with Routes that use NIC1 after being brought up should
- // succeed.
- //
- // TODO(gvisor.dev/issue/1491): Should we instead completely
- // invalidate all Routes that were bound to a NIC that was brought
- // down at some point?
- if err := upFn(s, nicID1); err != nil {
- t.Fatalf("test.upFn(_, %d): %s", nicID1, err)
- }
- testSend(t, r1, ep1, buf)
- testFailingSend(t, r2, ep2, buf, tcpip.ErrInvalidEndpointState)
- }
- })
- }
- })
-}
-
-func TestRoutes(t *testing.T) {
- // Create a stack with the fake network protocol, two nics, and two
- // addresses per nic, the first nic has odd address, the second one has
- // even addresses.
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep1 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep1); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x03"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- ep2 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(2, ep2); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- if err := s.AddAddress(2, fakeNetNumber, "\x02"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- if err := s.AddAddress(2, fakeNetNumber, "\x04"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- // Set a route table that sends all packets with odd destination
- // addresses through the first NIC, and all even destination address
- // through the second one.
- {
- subnet0, err := tcpip.NewSubnet("\x00", "\x01")
- if err != nil {
- t.Fatal(err)
- }
- subnet1, err := tcpip.NewSubnet("\x01", "\x01")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{
- {Destination: subnet1, Gateway: "\x00", NIC: 1},
- {Destination: subnet0, Gateway: "\x00", NIC: 2},
- })
- }
-
- // Test routes to odd address.
- testRoute(t, s, 0, "", "\x05", "\x01")
- testRoute(t, s, 0, "\x01", "\x05", "\x01")
- testRoute(t, s, 1, "\x01", "\x05", "\x01")
- testRoute(t, s, 0, "\x03", "\x05", "\x03")
- testRoute(t, s, 1, "\x03", "\x05", "\x03")
-
- // Test routes to even address.
- testRoute(t, s, 0, "", "\x06", "\x02")
- testRoute(t, s, 0, "\x02", "\x06", "\x02")
- testRoute(t, s, 2, "\x02", "\x06", "\x02")
- testRoute(t, s, 0, "\x04", "\x06", "\x04")
- testRoute(t, s, 2, "\x04", "\x06", "\x04")
-
- // Try to send to odd numbered address from even numbered ones, then
- // vice-versa.
- testNoRoute(t, s, 0, "\x02", "\x05")
- testNoRoute(t, s, 2, "\x02", "\x05")
- testNoRoute(t, s, 0, "\x04", "\x05")
- testNoRoute(t, s, 2, "\x04", "\x05")
-
- testNoRoute(t, s, 0, "\x01", "\x06")
- testNoRoute(t, s, 1, "\x01", "\x06")
- testNoRoute(t, s, 0, "\x03", "\x06")
- testNoRoute(t, s, 1, "\x03", "\x06")
-}
-
-func TestAddressRemoval(t *testing.T) {
- const localAddrByte byte = 0x01
- localAddr := tcpip.Address([]byte{localAddrByte})
- remoteAddr := tcpip.Address("\x02")
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, localAddr); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- fakeNet := s.NetworkProtocolInstance(fakeNetNumber).(*fakeNetworkProtocol)
-
- buf := buffer.NewView(30)
-
- // Send and receive packets, and verify they are received.
- buf[dstAddrOffset] = localAddrByte
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- testSendTo(t, s, remoteAddr, ep, nil)
-
- // Remove the address, then check that send/receive doesn't work anymore.
- if err := s.RemoveAddress(1, localAddr); err != nil {
- t.Fatal("RemoveAddress failed:", err)
- }
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
- testFailingSendTo(t, s, remoteAddr, ep, nil, tcpip.ErrNoRoute)
-
- // Check that removing the same address fails.
- if err := s.RemoveAddress(1, localAddr); err != tcpip.ErrBadLocalAddress {
- t.Fatalf("RemoveAddress returned unexpected error, got = %v, want = %s", err, tcpip.ErrBadLocalAddress)
- }
-}
-
-func TestAddressRemovalWithRouteHeld(t *testing.T) {
- const localAddrByte byte = 0x01
- localAddr := tcpip.Address([]byte{localAddrByte})
- remoteAddr := tcpip.Address("\x02")
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatalf("CreateNIC failed: %v", err)
- }
- fakeNet := s.NetworkProtocolInstance(fakeNetNumber).(*fakeNetworkProtocol)
- buf := buffer.NewView(30)
-
- if err := s.AddAddress(1, fakeNetNumber, localAddr); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- r, err := s.FindRoute(0, "", remoteAddr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatal("FindRoute failed:", err)
- }
-
- // Send and receive packets, and verify they are received.
- buf[dstAddrOffset] = localAddrByte
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- testSend(t, r, ep, nil)
- testSendTo(t, s, remoteAddr, ep, nil)
-
- // Remove the address, then check that send/receive doesn't work anymore.
- if err := s.RemoveAddress(1, localAddr); err != nil {
- t.Fatal("RemoveAddress failed:", err)
- }
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
- testFailingSend(t, r, ep, nil, tcpip.ErrInvalidEndpointState)
- testFailingSendTo(t, s, remoteAddr, ep, nil, tcpip.ErrNoRoute)
-
- // Check that removing the same address fails.
- if err := s.RemoveAddress(1, localAddr); err != tcpip.ErrBadLocalAddress {
- t.Fatalf("RemoveAddress returned unexpected error, got = %v, want = %s", err, tcpip.ErrBadLocalAddress)
- }
-}
-
-func verifyAddress(t *testing.T, s *stack.Stack, nicID tcpip.NICID, addr tcpip.Address) {
- t.Helper()
- info, ok := s.NICInfo()[nicID]
- if !ok {
- t.Fatalf("NICInfo() failed to find nicID=%d", nicID)
- }
- if len(addr) == 0 {
- // No address given, verify that there is no address assigned to the NIC.
- for _, a := range info.ProtocolAddresses {
- if a.Protocol == fakeNetNumber && a.AddressWithPrefix != (tcpip.AddressWithPrefix{}) {
- t.Errorf("verify no-address: got = %s, want = %s", a.AddressWithPrefix, (tcpip.AddressWithPrefix{}))
- }
- }
- return
- }
- // Address given, verify the address is assigned to the NIC and no other
- // address is.
- found := false
- for _, a := range info.ProtocolAddresses {
- if a.Protocol == fakeNetNumber {
- if a.AddressWithPrefix.Address == addr {
- found = true
- } else {
- t.Errorf("verify address: got = %s, want = %s", a.AddressWithPrefix.Address, addr)
- }
- }
- }
- if !found {
- t.Errorf("verify address: couldn't find %s on the NIC", addr)
- }
-}
-
-func TestEndpointExpiration(t *testing.T) {
- const (
- localAddrByte byte = 0x01
- remoteAddr tcpip.Address = "\x03"
- noAddr tcpip.Address = ""
- nicID tcpip.NICID = 1
- )
- localAddr := tcpip.Address([]byte{localAddrByte})
-
- for _, promiscuous := range []bool{true, false} {
- for _, spoofing := range []bool{true, false} {
- t.Run(fmt.Sprintf("promiscuous=%t spoofing=%t", promiscuous, spoofing), func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(nicID, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- fakeNet := s.NetworkProtocolInstance(fakeNetNumber).(*fakeNetworkProtocol)
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = localAddrByte
-
- if promiscuous {
- if err := s.SetPromiscuousMode(nicID, true); err != nil {
- t.Fatal("SetPromiscuousMode failed:", err)
- }
- }
-
- if spoofing {
- if err := s.SetSpoofing(nicID, true); err != nil {
- t.Fatal("SetSpoofing failed:", err)
- }
- }
-
- // 1. No Address yet, send should only work for spoofing, receive for
- // promiscuous mode.
- //-----------------------
- verifyAddress(t, s, nicID, noAddr)
- if promiscuous {
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- } else {
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
- }
- if spoofing {
- // FIXME(b/139841518):Spoofing doesn't work if there is no primary address.
- // testSendTo(t, s, remoteAddr, ep, nil)
- } else {
- testFailingSendTo(t, s, remoteAddr, ep, nil, tcpip.ErrNoRoute)
- }
-
- // 2. Add Address, everything should work.
- //-----------------------
- if err := s.AddAddress(nicID, fakeNetNumber, localAddr); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
- verifyAddress(t, s, nicID, localAddr)
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- testSendTo(t, s, remoteAddr, ep, nil)
-
- // 3. Remove the address, send should only work for spoofing, receive
- // for promiscuous mode.
- //-----------------------
- if err := s.RemoveAddress(nicID, localAddr); err != nil {
- t.Fatal("RemoveAddress failed:", err)
- }
- verifyAddress(t, s, nicID, noAddr)
- if promiscuous {
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- } else {
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
- }
- if spoofing {
- // FIXME(b/139841518):Spoofing doesn't work if there is no primary address.
- // testSendTo(t, s, remoteAddr, ep, nil)
- } else {
- testFailingSendTo(t, s, remoteAddr, ep, nil, tcpip.ErrNoRoute)
- }
-
- // 4. Add Address back, everything should work again.
- //-----------------------
- if err := s.AddAddress(nicID, fakeNetNumber, localAddr); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
- verifyAddress(t, s, nicID, localAddr)
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- testSendTo(t, s, remoteAddr, ep, nil)
-
- // 5. Take a reference to the endpoint by getting a route. Verify that
- // we can still send/receive, including sending using the route.
- //-----------------------
- r, err := s.FindRoute(0, "", remoteAddr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatal("FindRoute failed:", err)
- }
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- testSendTo(t, s, remoteAddr, ep, nil)
- testSend(t, r, ep, nil)
-
- // 6. Remove the address. Send should only work for spoofing, receive
- // for promiscuous mode.
- //-----------------------
- if err := s.RemoveAddress(nicID, localAddr); err != nil {
- t.Fatal("RemoveAddress failed:", err)
- }
- verifyAddress(t, s, nicID, noAddr)
- if promiscuous {
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- } else {
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
- }
- if spoofing {
- testSend(t, r, ep, nil)
- testSendTo(t, s, remoteAddr, ep, nil)
- } else {
- testFailingSend(t, r, ep, nil, tcpip.ErrInvalidEndpointState)
- testFailingSendTo(t, s, remoteAddr, ep, nil, tcpip.ErrNoRoute)
- }
-
- // 7. Add Address back, everything should work again.
- //-----------------------
- if err := s.AddAddress(nicID, fakeNetNumber, localAddr); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
- verifyAddress(t, s, nicID, localAddr)
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- testSendTo(t, s, remoteAddr, ep, nil)
- testSend(t, r, ep, nil)
-
- // 8. Remove the route, sendTo/recv should still work.
- //-----------------------
- r.Release()
- verifyAddress(t, s, nicID, localAddr)
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- testSendTo(t, s, remoteAddr, ep, nil)
-
- // 9. Remove the address. Send should only work for spoofing, receive
- // for promiscuous mode.
- //-----------------------
- if err := s.RemoveAddress(nicID, localAddr); err != nil {
- t.Fatal("RemoveAddress failed:", err)
- }
- verifyAddress(t, s, nicID, noAddr)
- if promiscuous {
- testRecv(t, fakeNet, localAddrByte, ep, buf)
- } else {
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
- }
- if spoofing {
- // FIXME(b/139841518):Spoofing doesn't work if there is no primary address.
- // testSendTo(t, s, remoteAddr, ep, nil)
- } else {
- testFailingSendTo(t, s, remoteAddr, ep, nil, tcpip.ErrNoRoute)
- }
- })
- }
- }
-}
-
-func TestPromiscuousMode(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- fakeNet := s.NetworkProtocolInstance(fakeNetNumber).(*fakeNetworkProtocol)
-
- buf := buffer.NewView(30)
-
- // Write a packet, and check that it doesn't get delivered as we don't
- // have a matching endpoint.
- const localAddrByte byte = 0x01
- buf[dstAddrOffset] = localAddrByte
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
-
- // Set promiscuous mode, then check that packet is delivered.
- if err := s.SetPromiscuousMode(1, true); err != nil {
- t.Fatal("SetPromiscuousMode failed:", err)
- }
- testRecv(t, fakeNet, localAddrByte, ep, buf)
-
- // Check that we can't get a route as there is no local address.
- _, err := s.FindRoute(0, "", "\x02", fakeNetNumber, false /* multicastLoop */)
- if err != tcpip.ErrNoRoute {
- t.Fatalf("FindRoute returned unexpected error: got = %v, want = %s", err, tcpip.ErrNoRoute)
- }
-
- // Set promiscuous mode to false, then check that packet can't be
- // delivered anymore.
- if err := s.SetPromiscuousMode(1, false); err != nil {
- t.Fatal("SetPromiscuousMode failed:", err)
- }
- testFailingRecv(t, fakeNet, localAddrByte, ep, buf)
-}
-
-func TestSpoofingWithAddress(t *testing.T) {
- localAddr := tcpip.Address("\x01")
- nonExistentLocalAddr := tcpip.Address("\x02")
- dstAddr := tcpip.Address("\x03")
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, localAddr); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- // With address spoofing disabled, FindRoute does not permit an address
- // that was not added to the NIC to be used as the source.
- r, err := s.FindRoute(0, nonExistentLocalAddr, dstAddr, fakeNetNumber, false /* multicastLoop */)
- if err == nil {
- t.Errorf("FindRoute succeeded with route %+v when it should have failed", r)
- }
-
- // With address spoofing enabled, FindRoute permits any address to be used
- // as the source.
- if err := s.SetSpoofing(1, true); err != nil {
- t.Fatal("SetSpoofing failed:", err)
- }
- r, err = s.FindRoute(0, nonExistentLocalAddr, dstAddr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatal("FindRoute failed:", err)
- }
- if r.LocalAddress != nonExistentLocalAddr {
- t.Errorf("got Route.LocalAddress = %s, want = %s", r.LocalAddress, nonExistentLocalAddr)
- }
- if r.RemoteAddress != dstAddr {
- t.Errorf("got Route.RemoteAddress = %s, want = %s", r.RemoteAddress, dstAddr)
- }
- // Sending a packet works.
- testSendTo(t, s, dstAddr, ep, nil)
- testSend(t, r, ep, nil)
-
- // FindRoute should also work with a local address that exists on the NIC.
- r, err = s.FindRoute(0, localAddr, dstAddr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatal("FindRoute failed:", err)
- }
- if r.LocalAddress != localAddr {
- t.Errorf("got Route.LocalAddress = %s, want = %s", r.LocalAddress, nonExistentLocalAddr)
- }
- if r.RemoteAddress != dstAddr {
- t.Errorf("got Route.RemoteAddress = %s, want = %s", r.RemoteAddress, dstAddr)
- }
- // Sending a packet using the route works.
- testSend(t, r, ep, nil)
-}
-
-func TestSpoofingNoAddress(t *testing.T) {
- nonExistentLocalAddr := tcpip.Address("\x01")
- dstAddr := tcpip.Address("\x02")
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- // With address spoofing disabled, FindRoute does not permit an address
- // that was not added to the NIC to be used as the source.
- r, err := s.FindRoute(0, nonExistentLocalAddr, dstAddr, fakeNetNumber, false /* multicastLoop */)
- if err == nil {
- t.Errorf("FindRoute succeeded with route %+v when it should have failed", r)
- }
- // Sending a packet fails.
- testFailingSendTo(t, s, dstAddr, ep, nil, tcpip.ErrNoRoute)
-
- // With address spoofing enabled, FindRoute permits any address to be used
- // as the source.
- if err := s.SetSpoofing(1, true); err != nil {
- t.Fatal("SetSpoofing failed:", err)
- }
- r, err = s.FindRoute(0, nonExistentLocalAddr, dstAddr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatal("FindRoute failed:", err)
- }
- if r.LocalAddress != nonExistentLocalAddr {
- t.Errorf("got Route.LocalAddress = %s, want = %s", r.LocalAddress, nonExistentLocalAddr)
- }
- if r.RemoteAddress != dstAddr {
- t.Errorf("got Route.RemoteAddress = %s, want = %s", r.RemoteAddress, dstAddr)
- }
- // Sending a packet works.
- // FIXME(b/139841518):Spoofing doesn't work if there is no primary address.
- // testSendTo(t, s, remoteAddr, ep, nil)
-}
-
-func verifyRoute(gotRoute, wantRoute stack.Route) error {
- if gotRoute.LocalAddress != wantRoute.LocalAddress {
- return fmt.Errorf("bad local address: got %s, want = %s", gotRoute.LocalAddress, wantRoute.LocalAddress)
- }
- if gotRoute.RemoteAddress != wantRoute.RemoteAddress {
- return fmt.Errorf("bad remote address: got %s, want = %s", gotRoute.RemoteAddress, wantRoute.RemoteAddress)
- }
- if gotRoute.RemoteLinkAddress != wantRoute.RemoteLinkAddress {
- return fmt.Errorf("bad remote link address: got %s, want = %s", gotRoute.RemoteLinkAddress, wantRoute.RemoteLinkAddress)
- }
- if gotRoute.NextHop != wantRoute.NextHop {
- return fmt.Errorf("bad next-hop address: got %s, want = %s", gotRoute.NextHop, wantRoute.NextHop)
- }
- return nil
-}
-
-func TestOutgoingBroadcastWithEmptyRouteTable(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
- s.SetRouteTable([]tcpip.Route{})
-
- // If there is no endpoint, it won't work.
- if _, err := s.FindRoute(1, header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */); err != tcpip.ErrNetworkUnreachable {
- t.Fatalf("got FindRoute(1, %s, %s, %d) = %s, want = %s", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err, tcpip.ErrNetworkUnreachable)
- }
-
- protoAddr := tcpip.ProtocolAddress{Protocol: fakeNetNumber, AddressWithPrefix: tcpip.AddressWithPrefix{header.IPv4Any, 0}}
- if err := s.AddProtocolAddress(1, protoAddr); err != nil {
- t.Fatalf("AddProtocolAddress(1, %v) failed: %v", protoAddr, err)
- }
- r, err := s.FindRoute(1, header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatalf("FindRoute(1, %v, %v, %d) failed: %v", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err)
- }
- if err := verifyRoute(r, stack.Route{LocalAddress: header.IPv4Any, RemoteAddress: header.IPv4Broadcast}); err != nil {
- t.Errorf("FindRoute(1, %v, %v, %d) returned unexpected Route: %v", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err)
- }
-
- // If the NIC doesn't exist, it won't work.
- if _, err := s.FindRoute(2, header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */); err != tcpip.ErrNetworkUnreachable {
- t.Fatalf("got FindRoute(2, %v, %v, %d) = %v want = %v", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err, tcpip.ErrNetworkUnreachable)
- }
-}
-
-func TestOutgoingBroadcastWithRouteTable(t *testing.T) {
- defaultAddr := tcpip.AddressWithPrefix{header.IPv4Any, 0}
- // Local subnet on NIC1: 192.168.1.58/24, gateway 192.168.1.1.
- nic1Addr := tcpip.AddressWithPrefix{"\xc0\xa8\x01\x3a", 24}
- nic1Gateway := tcpip.Address("\xc0\xa8\x01\x01")
- // Local subnet on NIC2: 10.10.10.5/24, gateway 10.10.10.1.
- nic2Addr := tcpip.AddressWithPrefix{"\x0a\x0a\x0a\x05", 24}
- nic2Gateway := tcpip.Address("\x0a\x0a\x0a\x01")
-
- // Create a new stack with two NICs.
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatalf("CreateNIC failed: %s", err)
- }
- if err := s.CreateNIC(2, ep); err != nil {
- t.Fatalf("CreateNIC failed: %s", err)
- }
- nic1ProtoAddr := tcpip.ProtocolAddress{fakeNetNumber, nic1Addr}
- if err := s.AddProtocolAddress(1, nic1ProtoAddr); err != nil {
- t.Fatalf("AddProtocolAddress(1, %v) failed: %v", nic1ProtoAddr, err)
- }
-
- nic2ProtoAddr := tcpip.ProtocolAddress{fakeNetNumber, nic2Addr}
- if err := s.AddProtocolAddress(2, nic2ProtoAddr); err != nil {
- t.Fatalf("AddAddress(2, %v) failed: %v", nic2ProtoAddr, err)
- }
-
- // Set the initial route table.
- rt := []tcpip.Route{
- {Destination: nic1Addr.Subnet(), NIC: 1},
- {Destination: nic2Addr.Subnet(), NIC: 2},
- {Destination: defaultAddr.Subnet(), Gateway: nic2Gateway, NIC: 2},
- {Destination: defaultAddr.Subnet(), Gateway: nic1Gateway, NIC: 1},
- }
- s.SetRouteTable(rt)
-
- // When an interface is given, the route for a broadcast goes through it.
- r, err := s.FindRoute(1, nic1Addr.Address, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatalf("FindRoute(1, %v, %v, %d) failed: %v", nic1Addr.Address, header.IPv4Broadcast, fakeNetNumber, err)
- }
- if err := verifyRoute(r, stack.Route{LocalAddress: nic1Addr.Address, RemoteAddress: header.IPv4Broadcast}); err != nil {
- t.Errorf("FindRoute(1, %v, %v, %d) returned unexpected Route: %v", nic1Addr.Address, header.IPv4Broadcast, fakeNetNumber, err)
- }
-
- // When an interface is not given, it consults the route table.
- // 1. Case: Using the default route.
- r, err = s.FindRoute(0, "", header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatalf("FindRoute(0, \"\", %s, %d) failed: %s", header.IPv4Broadcast, fakeNetNumber, err)
- }
- if err := verifyRoute(r, stack.Route{LocalAddress: nic2Addr.Address, RemoteAddress: header.IPv4Broadcast}); err != nil {
- t.Errorf("FindRoute(0, \"\", %s, %d) returned unexpected Route: %s)", header.IPv4Broadcast, fakeNetNumber, err)
- }
-
- // 2. Case: Having an explicit route for broadcast will select that one.
- rt = append(
- []tcpip.Route{
- {Destination: tcpip.AddressWithPrefix{header.IPv4Broadcast, 8 * header.IPv4AddressSize}.Subnet(), NIC: 1},
- },
- rt...,
- )
- s.SetRouteTable(rt)
- r, err = s.FindRoute(0, "", header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatalf("FindRoute(0, \"\", %s, %d) failed: %s", header.IPv4Broadcast, fakeNetNumber, err)
- }
- if err := verifyRoute(r, stack.Route{LocalAddress: nic1Addr.Address, RemoteAddress: header.IPv4Broadcast}); err != nil {
- t.Errorf("FindRoute(0, \"\", %s, %d) returned unexpected Route: %s)", header.IPv4Broadcast, fakeNetNumber, err)
- }
-}
-
-func TestMulticastOrIPv6LinkLocalNeedsNoRoute(t *testing.T) {
- for _, tc := range []struct {
- name string
- routeNeeded bool
- address tcpip.Address
- }{
- // IPv4 multicast address range: 224.0.0.0 - 239.255.255.255
- // <=> 0xe0.0x00.0x00.0x00 - 0xef.0xff.0xff.0xff
- {"IPv4 Multicast 1", false, "\xe0\x00\x00\x00"},
- {"IPv4 Multicast 2", false, "\xef\xff\xff\xff"},
- {"IPv4 Unicast 1", true, "\xdf\xff\xff\xff"},
- {"IPv4 Unicast 2", true, "\xf0\x00\x00\x00"},
- {"IPv4 Unicast 3", true, "\x00\x00\x00\x00"},
-
- // IPv6 multicast address is 0xff[8] + flags[4] + scope[4] + groupId[112]
- {"IPv6 Multicast 1", false, "\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Multicast 2", false, "\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Multicast 3", false, "\xff\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"},
-
- // IPv6 link-local address starts with fe80::/10.
- {"IPv6 Unicast Link-Local 1", false, "\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Unicast Link-Local 2", false, "\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01"},
- {"IPv6 Unicast Link-Local 3", false, "\xfe\x80\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff"},
- {"IPv6 Unicast Link-Local 4", false, "\xfe\xbf\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Unicast Link-Local 5", false, "\xfe\xbf\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"},
-
- // IPv6 addresses that are neither multicast nor link-local.
- {"IPv6 Unicast Not Link-Local 1", true, "\xf0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Unicast Not Link-Local 2", true, "\xf0\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"},
- {"IPv6 Unicast Not Link-local 3", true, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Unicast Not Link-Local 4", true, "\xfe\xc0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Unicast Not Link-Local 5", true, "\xfe\xdf\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Unicast Not Link-Local 6", true, "\xfd\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- {"IPv6 Unicast Not Link-Local 7", true, "\xf0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"},
- } {
- t.Run(tc.name, func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
-
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- s.SetRouteTable([]tcpip.Route{})
-
- var anyAddr tcpip.Address
- if len(tc.address) == header.IPv4AddressSize {
- anyAddr = header.IPv4Any
- } else {
- anyAddr = header.IPv6Any
- }
-
- want := tcpip.ErrNetworkUnreachable
- if tc.routeNeeded {
- want = tcpip.ErrNoRoute
- }
-
- // If there is no endpoint, it won't work.
- if _, err := s.FindRoute(1, anyAddr, tc.address, fakeNetNumber, false /* multicastLoop */); err != want {
- t.Fatalf("got FindRoute(1, %v, %v, %v) = %v, want = %v", anyAddr, tc.address, fakeNetNumber, err, want)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, anyAddr); err != nil {
- t.Fatalf("AddAddress(%v, %v) failed: %v", fakeNetNumber, anyAddr, err)
- }
-
- if r, err := s.FindRoute(1, anyAddr, tc.address, fakeNetNumber, false /* multicastLoop */); tc.routeNeeded {
- // Route table is empty but we need a route, this should cause an error.
- if err != tcpip.ErrNoRoute {
- t.Fatalf("got FindRoute(1, %v, %v, %v) = %v, want = %v", anyAddr, tc.address, fakeNetNumber, err, tcpip.ErrNoRoute)
- }
- } else {
- if err != nil {
- t.Fatalf("FindRoute(1, %v, %v, %v) failed: %v", anyAddr, tc.address, fakeNetNumber, err)
- }
- if r.LocalAddress != anyAddr {
- t.Errorf("Bad local address: got %v, want = %v", r.LocalAddress, anyAddr)
- }
- if r.RemoteAddress != tc.address {
- t.Errorf("Bad remote address: got %v, want = %v", r.RemoteAddress, tc.address)
- }
- }
- // If the NIC doesn't exist, it won't work.
- if _, err := s.FindRoute(2, anyAddr, tc.address, fakeNetNumber, false /* multicastLoop */); err != want {
- t.Fatalf("got FindRoute(2, %v, %v, %v) = %v want = %v", anyAddr, tc.address, fakeNetNumber, err, want)
- }
- })
- }
-}
-
-func TestNetworkOption(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- TransportProtocols: []stack.TransportProtocol{},
- })
-
- opt := tcpip.DefaultTTLOption(5)
- if err := s.SetNetworkProtocolOption(fakeNetNumber, &opt); err != nil {
- t.Fatalf("s.SetNetworkProtocolOption(%d, &%T(%d)): %s", fakeNetNumber, opt, opt, err)
- }
-
- var optGot tcpip.DefaultTTLOption
- if err := s.NetworkProtocolOption(fakeNetNumber, &optGot); err != nil {
- t.Fatalf("s.NetworkProtocolOption(%d, &%T): %s", fakeNetNumber, optGot, err)
- }
-
- if opt != optGot {
- t.Errorf("got optGot = %d, want = %d", optGot, opt)
- }
-}
-
-func TestGetMainNICAddressAddPrimaryNonPrimary(t *testing.T) {
- for _, addrLen := range []int{4, 16} {
- t.Run(fmt.Sprintf("addrLen=%d", addrLen), func(t *testing.T) {
- for canBe := 0; canBe < 3; canBe++ {
- t.Run(fmt.Sprintf("canBe=%d", canBe), func(t *testing.T) {
- for never := 0; never < 3; never++ {
- t.Run(fmt.Sprintf("never=%d", never), func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
- // Insert <canBe> primary and <never> never-primary addresses.
- // Each one will add a network endpoint to the NIC.
- primaryAddrAdded := make(map[tcpip.AddressWithPrefix]struct{})
- for i := 0; i < canBe+never; i++ {
- var behavior stack.PrimaryEndpointBehavior
- if i < canBe {
- behavior = stack.CanBePrimaryEndpoint
- } else {
- behavior = stack.NeverPrimaryEndpoint
- }
- // Add an address and in case of a primary one include a
- // prefixLen.
- address := tcpip.Address(bytes.Repeat([]byte{byte(i)}, addrLen))
- if behavior == stack.CanBePrimaryEndpoint {
- protocolAddress := tcpip.ProtocolAddress{
- Protocol: fakeNetNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{
- Address: address,
- PrefixLen: addrLen * 8,
- },
- }
- if err := s.AddProtocolAddressWithOptions(1, protocolAddress, behavior); err != nil {
- t.Fatal("AddProtocolAddressWithOptions failed:", err)
- }
- // Remember the address/prefix.
- primaryAddrAdded[protocolAddress.AddressWithPrefix] = struct{}{}
- } else {
- if err := s.AddAddressWithOptions(1, fakeNetNumber, address, behavior); err != nil {
- t.Fatal("AddAddressWithOptions failed:", err)
- }
- }
- }
- // Check that GetMainNICAddress returns an address if at least
- // one primary address was added. In that case make sure the
- // address/prefixLen matches what we added.
- gotAddr, err := s.GetMainNICAddress(1, fakeNetNumber)
- if err != nil {
- t.Fatal("GetMainNICAddress failed:", err)
- }
- if len(primaryAddrAdded) == 0 {
- // No primary addresses present.
- if wantAddr := (tcpip.AddressWithPrefix{}); gotAddr != wantAddr {
- t.Fatalf("GetMainNICAddress: got addr = %s, want = %s", gotAddr, wantAddr)
- }
- } else {
- // At least one primary address was added, verify the returned
- // address is in the list of primary addresses we added.
- if _, ok := primaryAddrAdded[gotAddr]; !ok {
- t.Fatalf("GetMainNICAddress: got = %s, want any in {%v}", gotAddr, primaryAddrAdded)
- }
- }
- })
- }
- })
- }
- })
- }
-}
-
-func TestGetMainNICAddressAddRemove(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- for _, tc := range []struct {
- name string
- address tcpip.Address
- prefixLen int
- }{
- {"IPv4", "\x01\x01\x01\x01", 24},
- {"IPv6", "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01", 116},
- } {
- t.Run(tc.name, func(t *testing.T) {
- protocolAddress := tcpip.ProtocolAddress{
- Protocol: fakeNetNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{
- Address: tc.address,
- PrefixLen: tc.prefixLen,
- },
- }
- if err := s.AddProtocolAddress(1, protocolAddress); err != nil {
- t.Fatal("AddProtocolAddress failed:", err)
- }
-
- // Check that we get the right initial address and prefix length.
- gotAddr, err := s.GetMainNICAddress(1, fakeNetNumber)
- if err != nil {
- t.Fatal("GetMainNICAddress failed:", err)
- }
- if wantAddr := protocolAddress.AddressWithPrefix; gotAddr != wantAddr {
- t.Fatalf("got s.GetMainNICAddress(...) = %s, want = %s", gotAddr, wantAddr)
- }
-
- if err := s.RemoveAddress(1, protocolAddress.AddressWithPrefix.Address); err != nil {
- t.Fatal("RemoveAddress failed:", err)
- }
-
- // Check that we get no address after removal.
- gotAddr, err = s.GetMainNICAddress(1, fakeNetNumber)
- if err != nil {
- t.Fatal("GetMainNICAddress failed:", err)
- }
- if wantAddr := (tcpip.AddressWithPrefix{}); gotAddr != wantAddr {
- t.Fatalf("got GetMainNICAddress(...) = %s, want = %s", gotAddr, wantAddr)
- }
- })
- }
-}
-
-// Simple network address generator. Good for 255 addresses.
-type addressGenerator struct{ cnt byte }
-
-func (g *addressGenerator) next(addrLen int) tcpip.Address {
- g.cnt++
- return tcpip.Address(bytes.Repeat([]byte{g.cnt}, addrLen))
-}
-
-func verifyAddresses(t *testing.T, expectedAddresses, gotAddresses []tcpip.ProtocolAddress) {
- t.Helper()
-
- if len(gotAddresses) != len(expectedAddresses) {
- t.Fatalf("got len(addresses) = %d, want = %d", len(gotAddresses), len(expectedAddresses))
- }
-
- sort.Slice(gotAddresses, func(i, j int) bool {
- return gotAddresses[i].AddressWithPrefix.Address < gotAddresses[j].AddressWithPrefix.Address
- })
- sort.Slice(expectedAddresses, func(i, j int) bool {
- return expectedAddresses[i].AddressWithPrefix.Address < expectedAddresses[j].AddressWithPrefix.Address
- })
-
- for i, gotAddr := range gotAddresses {
- expectedAddr := expectedAddresses[i]
- if gotAddr != expectedAddr {
- t.Errorf("got address = %+v, wanted = %+v", gotAddr, expectedAddr)
- }
- }
-}
-
-func TestAddAddress(t *testing.T) {
- const nicID = 1
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(nicID, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- var addrGen addressGenerator
- expectedAddresses := make([]tcpip.ProtocolAddress, 0, 2)
- for _, addrLen := range []int{4, 16} {
- address := addrGen.next(addrLen)
- if err := s.AddAddress(nicID, fakeNetNumber, address); err != nil {
- t.Fatalf("AddAddress(address=%s) failed: %s", address, err)
- }
- expectedAddresses = append(expectedAddresses, tcpip.ProtocolAddress{
- Protocol: fakeNetNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{address, fakeDefaultPrefixLen},
- })
- }
-
- gotAddresses := s.AllAddresses()[nicID]
- verifyAddresses(t, expectedAddresses, gotAddresses)
-}
-
-func TestAddProtocolAddress(t *testing.T) {
- const nicID = 1
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(nicID, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- var addrGen addressGenerator
- addrLenRange := []int{4, 16}
- prefixLenRange := []int{8, 13, 20, 32}
- expectedAddresses := make([]tcpip.ProtocolAddress, 0, len(addrLenRange)*len(prefixLenRange))
- for _, addrLen := range addrLenRange {
- for _, prefixLen := range prefixLenRange {
- protocolAddress := tcpip.ProtocolAddress{
- Protocol: fakeNetNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{
- Address: addrGen.next(addrLen),
- PrefixLen: prefixLen,
- },
- }
- if err := s.AddProtocolAddress(nicID, protocolAddress); err != nil {
- t.Errorf("AddProtocolAddress(%+v) failed: %s", protocolAddress, err)
- }
- expectedAddresses = append(expectedAddresses, protocolAddress)
- }
- }
-
- gotAddresses := s.AllAddresses()[nicID]
- verifyAddresses(t, expectedAddresses, gotAddresses)
-}
-
-func TestAddAddressWithOptions(t *testing.T) {
- const nicID = 1
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(nicID, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- addrLenRange := []int{4, 16}
- behaviorRange := []stack.PrimaryEndpointBehavior{stack.CanBePrimaryEndpoint, stack.FirstPrimaryEndpoint, stack.NeverPrimaryEndpoint}
- expectedAddresses := make([]tcpip.ProtocolAddress, 0, len(addrLenRange)*len(behaviorRange))
- var addrGen addressGenerator
- for _, addrLen := range addrLenRange {
- for _, behavior := range behaviorRange {
- address := addrGen.next(addrLen)
- if err := s.AddAddressWithOptions(nicID, fakeNetNumber, address, behavior); err != nil {
- t.Fatalf("AddAddressWithOptions(address=%s, behavior=%d) failed: %s", address, behavior, err)
- }
- expectedAddresses = append(expectedAddresses, tcpip.ProtocolAddress{
- Protocol: fakeNetNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{address, fakeDefaultPrefixLen},
- })
- }
- }
-
- gotAddresses := s.AllAddresses()[nicID]
- verifyAddresses(t, expectedAddresses, gotAddresses)
-}
-
-func TestAddProtocolAddressWithOptions(t *testing.T) {
- const nicID = 1
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(nicID, ep); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- addrLenRange := []int{4, 16}
- prefixLenRange := []int{8, 13, 20, 32}
- behaviorRange := []stack.PrimaryEndpointBehavior{stack.CanBePrimaryEndpoint, stack.FirstPrimaryEndpoint, stack.NeverPrimaryEndpoint}
- expectedAddresses := make([]tcpip.ProtocolAddress, 0, len(addrLenRange)*len(prefixLenRange)*len(behaviorRange))
- var addrGen addressGenerator
- for _, addrLen := range addrLenRange {
- for _, prefixLen := range prefixLenRange {
- for _, behavior := range behaviorRange {
- protocolAddress := tcpip.ProtocolAddress{
- Protocol: fakeNetNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{
- Address: addrGen.next(addrLen),
- PrefixLen: prefixLen,
- },
- }
- if err := s.AddProtocolAddressWithOptions(nicID, protocolAddress, behavior); err != nil {
- t.Fatalf("AddProtocolAddressWithOptions(%+v, %d) failed: %s", protocolAddress, behavior, err)
- }
- expectedAddresses = append(expectedAddresses, protocolAddress)
- }
- }
- }
-
- gotAddresses := s.AllAddresses()[nicID]
- verifyAddresses(t, expectedAddresses, gotAddresses)
-}
-
-func TestCreateNICWithOptions(t *testing.T) {
- type callArgsAndExpect struct {
- nicID tcpip.NICID
- opts stack.NICOptions
- err *tcpip.Error
- }
-
- tests := []struct {
- desc string
- calls []callArgsAndExpect
- }{
- {
- desc: "DuplicateNICID",
- calls: []callArgsAndExpect{
- {
- nicID: tcpip.NICID(1),
- opts: stack.NICOptions{Name: "eth1"},
- err: nil,
- },
- {
- nicID: tcpip.NICID(1),
- opts: stack.NICOptions{Name: "eth2"},
- err: tcpip.ErrDuplicateNICID,
- },
- },
- },
- {
- desc: "DuplicateName",
- calls: []callArgsAndExpect{
- {
- nicID: tcpip.NICID(1),
- opts: stack.NICOptions{Name: "lo"},
- err: nil,
- },
- {
- nicID: tcpip.NICID(2),
- opts: stack.NICOptions{Name: "lo"},
- err: tcpip.ErrDuplicateNICID,
- },
- },
- },
- {
- desc: "Unnamed",
- calls: []callArgsAndExpect{
- {
- nicID: tcpip.NICID(1),
- opts: stack.NICOptions{},
- err: nil,
- },
- {
- nicID: tcpip.NICID(2),
- opts: stack.NICOptions{},
- err: nil,
- },
- },
- },
- {
- desc: "UnnamedDuplicateNICID",
- calls: []callArgsAndExpect{
- {
- nicID: tcpip.NICID(1),
- opts: stack.NICOptions{},
- err: nil,
- },
- {
- nicID: tcpip.NICID(1),
- opts: stack.NICOptions{},
- err: tcpip.ErrDuplicateNICID,
- },
- },
- },
- }
- for _, test := range tests {
- t.Run(test.desc, func(t *testing.T) {
- s := stack.New(stack.Options{})
- ep := channel.New(0, 0, tcpip.LinkAddress("\x00\x00\x00\x00\x00\x00"))
- for _, call := range test.calls {
- if got, want := s.CreateNICWithOptions(call.nicID, ep, call.opts), call.err; got != want {
- t.Fatalf("CreateNICWithOptions(%v, _, %+v) = %v, want %v", call.nicID, call.opts, got, want)
- }
- }
- })
- }
-}
-
-func TestNICStats(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep1 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep1); err != nil {
- t.Fatal("CreateNIC failed: ", err)
- }
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatal("AddAddress failed:", err)
- }
- // Route all packets for address \x01 to NIC 1.
- {
- subnet, err := tcpip.NewSubnet("\x01", "\xff")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- // Send a packet to address 1.
- buf := buffer.NewView(30)
- ep1.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if got, want := s.NICInfo()[1].Stats.Rx.Packets.Value(), uint64(1); got != want {
- t.Errorf("got Rx.Packets.Value() = %d, want = %d", got, want)
- }
-
- if got, want := s.NICInfo()[1].Stats.Rx.Bytes.Value(), uint64(len(buf)); got != want {
- t.Errorf("got Rx.Bytes.Value() = %d, want = %d", got, want)
- }
-
- payload := buffer.NewView(10)
- // Write a packet out via the address for NIC 1
- if err := sendTo(s, "\x01", payload); err != nil {
- t.Fatal("sendTo failed: ", err)
- }
- want := uint64(ep1.Drain())
- if got := s.NICInfo()[1].Stats.Tx.Packets.Value(); got != want {
- t.Errorf("got Tx.Packets.Value() = %d, ep1.Drain() = %d", got, want)
- }
-
- if got, want := s.NICInfo()[1].Stats.Tx.Bytes.Value(), uint64(len(payload)); got != want {
- t.Errorf("got Tx.Bytes.Value() = %d, want = %d", got, want)
- }
-}
-
-func TestNICForwarding(t *testing.T) {
- const nicID1 = 1
- const nicID2 = 2
- const dstAddr = tcpip.Address("\x03")
-
- tests := []struct {
- name string
- headerLen uint16
- }{
- {
- name: "Zero header length",
- },
- {
- name: "Non-zero header length",
- headerLen: 16,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- s.SetForwarding(true)
-
- ep1 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(nicID1, ep1); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID1, err)
- }
- if err := s.AddAddress(nicID1, fakeNetNumber, "\x01"); err != nil {
- t.Fatalf("AddAddress(%d, %d, 0x01): %s", nicID1, fakeNetNumber, err)
- }
-
- ep2 := channelLinkWithHeaderLength{
- Endpoint: channel.New(10, defaultMTU, ""),
- headerLength: test.headerLen,
- }
- if err := s.CreateNIC(nicID2, &ep2); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID2, err)
- }
- if err := s.AddAddress(nicID2, fakeNetNumber, "\x02"); err != nil {
- t.Fatalf("AddAddress(%d, %d, 0x02): %s", nicID2, fakeNetNumber, err)
- }
-
- // Route all packets to dstAddr to NIC 2.
- {
- subnet, err := tcpip.NewSubnet(dstAddr, "\xff")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: nicID2}})
- }
-
- // Send a packet to dstAddr.
- buf := buffer.NewView(30)
- buf[dstAddrOffset] = dstAddr[0]
- ep1.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
-
- pkt, ok := ep2.Read()
- if !ok {
- t.Fatal("packet not forwarded")
- }
-
- // Test that the link's MaxHeaderLength is honoured.
- if capacity, want := pkt.Pkt.AvailableHeaderBytes(), int(test.headerLen); capacity != want {
- t.Errorf("got LinkHeader.AvailableLength() = %d, want = %d", capacity, want)
- }
-
- // Test that forwarding increments Tx stats correctly.
- if got, want := s.NICInfo()[nicID2].Stats.Tx.Packets.Value(), uint64(1); got != want {
- t.Errorf("got Tx.Packets.Value() = %d, want = %d", got, want)
- }
-
- if got, want := s.NICInfo()[nicID2].Stats.Tx.Bytes.Value(), uint64(len(buf)); got != want {
- t.Errorf("got Tx.Bytes.Value() = %d, want = %d", got, want)
- }
- })
- }
-}
-
-// TestNICContextPreservation tests that you can read out via stack.NICInfo the
-// Context data you pass via NICContext.Context in stack.CreateNICWithOptions.
-func TestNICContextPreservation(t *testing.T) {
- var ctx *int
- tests := []struct {
- name string
- opts stack.NICOptions
- want stack.NICContext
- }{
- {
- "context_set",
- stack.NICOptions{Context: ctx},
- ctx,
- },
- {
- "context_not_set",
- stack.NICOptions{},
- nil,
- },
- }
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- s := stack.New(stack.Options{})
- id := tcpip.NICID(1)
- ep := channel.New(0, 0, tcpip.LinkAddress("\x00\x00\x00\x00\x00\x00"))
- if err := s.CreateNICWithOptions(id, ep, test.opts); err != nil {
- t.Fatalf("got stack.CreateNICWithOptions(%d, %+v, %+v) = %s, want nil", id, ep, test.opts, err)
- }
- nicinfos := s.NICInfo()
- nicinfo, ok := nicinfos[id]
- if !ok {
- t.Fatalf("got nicinfos[%d] = _, %t, want _, true; nicinfos = %+v", id, ok, nicinfos)
- }
- if got, want := nicinfo.Context == test.want, true; got != want {
- t.Fatalf("got nicinfo.Context == ctx = %t, want %t; nicinfo.Context = %p, ctx = %p", got, want, nicinfo.Context, test.want)
- }
- })
- }
-}
-
-// TestNICAutoGenLinkLocalAddr tests the auto-generation of IPv6 link-local
-// addresses.
-func TestNICAutoGenLinkLocalAddr(t *testing.T) {
- const nicID = 1
-
- var secretKey [header.OpaqueIIDSecretKeyMinBytes]byte
- n, err := rand.Read(secretKey[:])
- if err != nil {
- t.Fatalf("rand.Read(_): %s", err)
- }
- if n != header.OpaqueIIDSecretKeyMinBytes {
- t.Fatalf("expected rand.Read to read %d bytes, read %d bytes", header.OpaqueIIDSecretKeyMinBytes, n)
- }
-
- nicNameFunc := func(_ tcpip.NICID, name string) string {
- return name
- }
-
- tests := []struct {
- name string
- nicName string
- autoGen bool
- linkAddr tcpip.LinkAddress
- iidOpts stack.OpaqueInterfaceIdentifierOptions
- shouldGen bool
- expectedAddr tcpip.Address
- }{
- {
- name: "Disabled",
- nicName: "nic1",
- autoGen: false,
- linkAddr: linkAddr1,
- shouldGen: false,
- },
- {
- name: "Disabled without OIID options",
- nicName: "nic1",
- autoGen: false,
- linkAddr: linkAddr1,
- iidOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: nicNameFunc,
- SecretKey: secretKey[:],
- },
- shouldGen: false,
- },
-
- // Tests for EUI64 based addresses.
- {
- name: "EUI64 Enabled",
- autoGen: true,
- linkAddr: linkAddr1,
- shouldGen: true,
- expectedAddr: header.LinkLocalAddr(linkAddr1),
- },
- {
- name: "EUI64 Empty MAC",
- autoGen: true,
- shouldGen: false,
- },
- {
- name: "EUI64 Invalid MAC",
- autoGen: true,
- linkAddr: "\x01\x02\x03",
- shouldGen: false,
- },
- {
- name: "EUI64 Multicast MAC",
- autoGen: true,
- linkAddr: "\x01\x02\x03\x04\x05\x06",
- shouldGen: false,
- },
- {
- name: "EUI64 Unspecified MAC",
- autoGen: true,
- linkAddr: "\x00\x00\x00\x00\x00\x00",
- shouldGen: false,
- },
-
- // Tests for Opaque IID based addresses.
- {
- name: "OIID Enabled",
- nicName: "nic1",
- autoGen: true,
- linkAddr: linkAddr1,
- iidOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: nicNameFunc,
- SecretKey: secretKey[:],
- },
- shouldGen: true,
- expectedAddr: header.LinkLocalAddrWithOpaqueIID("nic1", 0, secretKey[:]),
- },
- // These are all cases where we would not have generated a
- // link-local address if opaque IIDs were disabled.
- {
- name: "OIID Empty MAC and empty nicName",
- autoGen: true,
- iidOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: nicNameFunc,
- SecretKey: secretKey[:1],
- },
- shouldGen: true,
- expectedAddr: header.LinkLocalAddrWithOpaqueIID("", 0, secretKey[:1]),
- },
- {
- name: "OIID Invalid MAC",
- nicName: "test",
- autoGen: true,
- linkAddr: "\x01\x02\x03",
- iidOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: nicNameFunc,
- SecretKey: secretKey[:2],
- },
- shouldGen: true,
- expectedAddr: header.LinkLocalAddrWithOpaqueIID("test", 0, secretKey[:2]),
- },
- {
- name: "OIID Multicast MAC",
- nicName: "test2",
- autoGen: true,
- linkAddr: "\x01\x02\x03\x04\x05\x06",
- iidOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: nicNameFunc,
- SecretKey: secretKey[:3],
- },
- shouldGen: true,
- expectedAddr: header.LinkLocalAddrWithOpaqueIID("test2", 0, secretKey[:3]),
- },
- {
- name: "OIID Unspecified MAC and nil SecretKey",
- nicName: "test3",
- autoGen: true,
- linkAddr: "\x00\x00\x00\x00\x00\x00",
- iidOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: nicNameFunc,
- },
- shouldGen: true,
- expectedAddr: header.LinkLocalAddrWithOpaqueIID("test3", 0, nil),
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- ndpDisp := ndpDispatcher{
- autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1),
- }
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- AutoGenIPv6LinkLocal: test.autoGen,
- NDPDisp: &ndpDisp,
- OpaqueIIDOpts: test.iidOpts,
- }
-
- e := channel.New(0, 1280, test.linkAddr)
- s := stack.New(opts)
- nicOpts := stack.NICOptions{Name: test.nicName, Disabled: true}
- if err := s.CreateNICWithOptions(nicID, e, nicOpts); err != nil {
- t.Fatalf("CreateNICWithOptions(%d, _, %+v) = %s", nicID, opts, err)
- }
-
- // A new disabled NIC should not have any address, even if auto generation
- // was enabled.
- allStackAddrs := s.AllAddresses()
- allNICAddrs, ok := allStackAddrs[nicID]
- if !ok {
- t.Fatalf("entry for %d missing from allStackAddrs = %+v", nicID, allStackAddrs)
- }
- if l := len(allNICAddrs); l != 0 {
- t.Fatalf("got len(allNICAddrs) = %d, want = 0", l)
- }
-
- // Enabling the NIC should attempt auto-generation of a link-local
- // address.
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
-
- var expectedMainAddr tcpip.AddressWithPrefix
- if test.shouldGen {
- expectedMainAddr = tcpip.AddressWithPrefix{
- Address: test.expectedAddr,
- PrefixLen: header.IPv6LinkLocalPrefix.PrefixLen,
- }
-
- // Should have auto-generated an address and resolved immediately (DAD
- // is disabled).
- select {
- case e := <-ndpDisp.autoGenAddrC:
- if diff := checkAutoGenAddrEvent(e, expectedMainAddr, newAddr); diff != "" {
- t.Errorf("auto-gen addr event mismatch (-want +got):\n%s", diff)
- }
- default:
- t.Fatal("expected addr auto gen event")
- }
- } else {
- // Should not have auto-generated an address.
- select {
- case <-ndpDisp.autoGenAddrC:
- t.Fatal("unexpectedly auto-generated an address")
- default:
- }
- }
-
- gotMainAddr, err := s.GetMainNICAddress(1, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("stack.GetMainNICAddress(_, _) err = %s", err)
- }
- if gotMainAddr != expectedMainAddr {
- t.Fatalf("got stack.GetMainNICAddress(_, _) = %s, want = %s", gotMainAddr, expectedMainAddr)
- }
- })
- }
-}
-
-// TestNoLinkLocalAutoGenForLoopbackNIC tests that IPv6 link-local addresses are
-// not auto-generated for loopback NICs.
-func TestNoLinkLocalAutoGenForLoopbackNIC(t *testing.T) {
- const nicID = 1
- const nicName = "nicName"
-
- tests := []struct {
- name string
- opaqueIIDOpts stack.OpaqueInterfaceIdentifierOptions
- }{
- {
- name: "IID From MAC",
- opaqueIIDOpts: stack.OpaqueInterfaceIdentifierOptions{},
- },
- {
- name: "Opaque IID",
- opaqueIIDOpts: stack.OpaqueInterfaceIdentifierOptions{
- NICNameFromID: func(_ tcpip.NICID, nicName string) string {
- return nicName
- },
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- AutoGenIPv6LinkLocal: true,
- OpaqueIIDOpts: test.opaqueIIDOpts,
- }
-
- e := loopback.New()
- s := stack.New(opts)
- nicOpts := stack.NICOptions{Name: nicName}
- if err := s.CreateNICWithOptions(nicID, e, nicOpts); err != nil {
- t.Fatalf("CreateNICWithOptions(%d, _, %+v) = %s", nicID, nicOpts, err)
- }
-
- addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("stack.GetMainNICAddress(%d, _) err = %s", nicID, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Errorf("got stack.GetMainNICAddress(%d, _) = %s, want = %s", nicID, addr, want)
- }
- })
- }
-}
-
-// TestNICAutoGenAddrDoesDAD tests that the successful auto-generation of IPv6
-// link-local addresses will only be assigned after the DAD process resolves.
-func TestNICAutoGenAddrDoesDAD(t *testing.T) {
- const nicID = 1
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent),
- }
- ndpConfigs := stack.DefaultNDPConfigurations()
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: ndpConfigs,
- AutoGenIPv6LinkLocal: true,
- NDPDisp: &ndpDisp,
- }
-
- e := channel.New(int(ndpConfigs.DupAddrDetectTransmits), 1280, linkAddr1)
- s := stack.New(opts)
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
-
- // Address should not be considered bound to the
- // NIC yet (DAD ongoing).
- addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
-
- linkLocalAddr := header.LinkLocalAddr(linkAddr1)
-
- // Wait for DAD to resolve.
- select {
- case <-time.After(time.Duration(ndpConfigs.DupAddrDetectTransmits)*ndpConfigs.RetransmitTimer + time.Second):
- // We should get a resolution event after 1s (default time to
- // resolve as per default NDP configurations). Waiting for that
- // resolution time + an extra 1s without a resolution event
- // means something is wrong.
- t.Fatal("timed out waiting for DAD resolution")
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, linkLocalAddr, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- }
- addr, err = s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{Address: linkLocalAddr, PrefixLen: header.IPv6LinkLocalPrefix.PrefixLen}); addr != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, addr, want)
- }
-}
-
-// TestNewPEB tests that a new PrimaryEndpointBehavior value (peb) is respected
-// when an address's kind gets "promoted" to permanent from permanentExpired.
-func TestNewPEBOnPromotionToPermanent(t *testing.T) {
- pebs := []stack.PrimaryEndpointBehavior{
- stack.NeverPrimaryEndpoint,
- stack.CanBePrimaryEndpoint,
- stack.FirstPrimaryEndpoint,
- }
-
- for _, pi := range pebs {
- for _, ps := range pebs {
- t.Run(fmt.Sprintf("%d-to-%d", pi, ps), func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- })
- ep1 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(1, ep1); err != nil {
- t.Fatal("CreateNIC failed:", err)
- }
-
- // Add a permanent address with initial
- // PrimaryEndpointBehavior (peb), pi. If pi is
- // NeverPrimaryEndpoint, the address should not
- // be returned by a call to GetMainNICAddress;
- // else, it should.
- if err := s.AddAddressWithOptions(1, fakeNetNumber, "\x01", pi); err != nil {
- t.Fatal("AddAddressWithOptions failed:", err)
- }
- addr, err := s.GetMainNICAddress(1, fakeNetNumber)
- if err != nil {
- t.Fatal("s.GetMainNICAddress failed:", err)
- }
- if pi == stack.NeverPrimaryEndpoint {
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got GetMainNICAddress = %s, want = %s", addr, want)
-
- }
- } else if addr.Address != "\x01" {
- t.Fatalf("got GetMainNICAddress = %s, want = 1", addr.Address)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatalf("NewSubnet failed: %v", err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- // Take a route through the address so its ref
- // count gets incremented and does not actually
- // get deleted when RemoveAddress is called
- // below. This is because we want to test that a
- // new peb is respected when an address gets
- // "promoted" to permanent from a
- // permanentExpired kind.
- r, err := s.FindRoute(1, "\x01", "\x02", fakeNetNumber, false)
- if err != nil {
- t.Fatalf("FindRoute failed: %v", err)
- }
- defer r.Release()
- if err := s.RemoveAddress(1, "\x01"); err != nil {
- t.Fatalf("RemoveAddress failed: %v", err)
- }
-
- //
- // At this point, the address should still be
- // known by the NIC, but have its
- // kind = permanentExpired.
- //
-
- // Add some other address with peb set to
- // FirstPrimaryEndpoint.
- if err := s.AddAddressWithOptions(1, fakeNetNumber, "\x03", stack.FirstPrimaryEndpoint); err != nil {
- t.Fatalf("AddAddressWithOptions failed: %v", err)
-
- }
-
- // Add back the address we removed earlier and
- // make sure the new peb was respected.
- // (The address should just be promoted now).
- if err := s.AddAddressWithOptions(1, fakeNetNumber, "\x01", ps); err != nil {
- t.Fatalf("AddAddressWithOptions failed: %v", err)
- }
- var primaryAddrs []tcpip.Address
- for _, pa := range s.NICInfo()[1].ProtocolAddresses {
- primaryAddrs = append(primaryAddrs, pa.AddressWithPrefix.Address)
- }
- var expectedList []tcpip.Address
- switch ps {
- case stack.FirstPrimaryEndpoint:
- expectedList = []tcpip.Address{
- "\x01",
- "\x03",
- }
- case stack.CanBePrimaryEndpoint:
- expectedList = []tcpip.Address{
- "\x03",
- "\x01",
- }
- case stack.NeverPrimaryEndpoint:
- expectedList = []tcpip.Address{
- "\x03",
- }
- }
- if !cmp.Equal(primaryAddrs, expectedList) {
- t.Fatalf("got NIC's primary addresses = %v, want = %v", primaryAddrs, expectedList)
- }
-
- // Once we remove the other address, if the new
- // peb, ps, was NeverPrimaryEndpoint, no address
- // should be returned by a call to
- // GetMainNICAddress; else, our original address
- // should be returned.
- if err := s.RemoveAddress(1, "\x03"); err != nil {
- t.Fatalf("RemoveAddress failed: %v", err)
- }
- addr, err = s.GetMainNICAddress(1, fakeNetNumber)
- if err != nil {
- t.Fatalf("s.GetMainNICAddress failed: %v", err)
- }
- if ps == stack.NeverPrimaryEndpoint {
- if want := (tcpip.AddressWithPrefix{}); addr != want {
- t.Fatalf("got GetMainNICAddress = %s, want = %s", addr, want)
-
- }
- } else {
- if addr.Address != "\x01" {
- t.Fatalf("got GetMainNICAddress = %s, want = 1", addr.Address)
- }
- }
- })
- }
- }
-}
-
-func TestIPv6SourceAddressSelectionScopeAndSameAddress(t *testing.T) {
- const (
- linkLocalAddr1 = tcpip.Address("\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01")
- linkLocalAddr2 = tcpip.Address("\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02")
- linkLocalMulticastAddr = tcpip.Address("\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01")
- uniqueLocalAddr1 = tcpip.Address("\xfc\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01")
- uniqueLocalAddr2 = tcpip.Address("\xfd\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02")
- globalAddr1 = tcpip.Address("\xa0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01")
- globalAddr2 = tcpip.Address("\xa0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02")
- nicID = 1
- lifetimeSeconds = 9999
- )
-
- prefix1, _, stableGlobalAddr1 := prefixSubnetAddr(0, linkAddr1)
- prefix2, _, stableGlobalAddr2 := prefixSubnetAddr(1, linkAddr1)
-
- var tempIIDHistory [header.IIDSize]byte
- header.InitialTempIID(tempIIDHistory[:], nil, nicID)
- tempGlobalAddr1 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], stableGlobalAddr1.Address).Address
- tempGlobalAddr2 := header.GenerateTempIPv6SLAACAddr(tempIIDHistory[:], stableGlobalAddr2.Address).Address
-
- // Rule 3 is not tested here, and is instead tested by NDP's AutoGenAddr test.
- tests := []struct {
- name string
- slaacPrefixForTempAddrBeforeNICAddrAdd tcpip.AddressWithPrefix
- nicAddrs []tcpip.Address
- slaacPrefixForTempAddrAfterNICAddrAdd tcpip.AddressWithPrefix
- connectAddr tcpip.Address
- expectedLocalAddr tcpip.Address
- }{
- // Test Rule 1 of RFC 6724 section 5.
- {
- name: "Same Global most preferred (last address)",
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, globalAddr1},
- connectAddr: globalAddr1,
- expectedLocalAddr: globalAddr1,
- },
- {
- name: "Same Global most preferred (first address)",
- nicAddrs: []tcpip.Address{globalAddr1, linkLocalAddr1, uniqueLocalAddr1},
- connectAddr: globalAddr1,
- expectedLocalAddr: globalAddr1,
- },
- {
- name: "Same Link Local most preferred (last address)",
- nicAddrs: []tcpip.Address{globalAddr1, uniqueLocalAddr1, linkLocalAddr1},
- connectAddr: linkLocalAddr1,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Same Link Local most preferred (first address)",
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, globalAddr1},
- connectAddr: linkLocalAddr1,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Same Unique Local most preferred (last address)",
- nicAddrs: []tcpip.Address{uniqueLocalAddr1, globalAddr1, linkLocalAddr1},
- connectAddr: uniqueLocalAddr1,
- expectedLocalAddr: uniqueLocalAddr1,
- },
- {
- name: "Same Unique Local most preferred (first address)",
- nicAddrs: []tcpip.Address{globalAddr1, linkLocalAddr1, uniqueLocalAddr1},
- connectAddr: uniqueLocalAddr1,
- expectedLocalAddr: uniqueLocalAddr1,
- },
-
- // Test Rule 2 of RFC 6724 section 5.
- {
- name: "Global most preferred (last address)",
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, globalAddr1},
- connectAddr: globalAddr2,
- expectedLocalAddr: globalAddr1,
- },
- {
- name: "Global most preferred (first address)",
- nicAddrs: []tcpip.Address{globalAddr1, linkLocalAddr1, uniqueLocalAddr1},
- connectAddr: globalAddr2,
- expectedLocalAddr: globalAddr1,
- },
- {
- name: "Link Local most preferred (last address)",
- nicAddrs: []tcpip.Address{globalAddr1, uniqueLocalAddr1, linkLocalAddr1},
- connectAddr: linkLocalAddr2,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Link Local most preferred (first address)",
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, globalAddr1},
- connectAddr: linkLocalAddr2,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Link Local most preferred for link local multicast (last address)",
- nicAddrs: []tcpip.Address{globalAddr1, uniqueLocalAddr1, linkLocalAddr1},
- connectAddr: linkLocalMulticastAddr,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Link Local most preferred for link local multicast (first address)",
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, globalAddr1},
- connectAddr: linkLocalMulticastAddr,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Unique Local most preferred (last address)",
- nicAddrs: []tcpip.Address{uniqueLocalAddr1, globalAddr1, linkLocalAddr1},
- connectAddr: uniqueLocalAddr2,
- expectedLocalAddr: uniqueLocalAddr1,
- },
- {
- name: "Unique Local most preferred (first address)",
- nicAddrs: []tcpip.Address{globalAddr1, linkLocalAddr1, uniqueLocalAddr1},
- connectAddr: uniqueLocalAddr2,
- expectedLocalAddr: uniqueLocalAddr1,
- },
-
- // Test Rule 7 of RFC 6724 section 5.
- {
- name: "Temp Global most preferred (last address)",
- slaacPrefixForTempAddrBeforeNICAddrAdd: prefix1,
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, globalAddr1},
- connectAddr: globalAddr2,
- expectedLocalAddr: tempGlobalAddr1,
- },
- {
- name: "Temp Global most preferred (first address)",
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, globalAddr1},
- slaacPrefixForTempAddrAfterNICAddrAdd: prefix1,
- connectAddr: globalAddr2,
- expectedLocalAddr: tempGlobalAddr1,
- },
-
- // Test returning the endpoint that is closest to the front when
- // candidate addresses are "equal" from the perspective of RFC 6724
- // section 5.
- {
- name: "Unique Local for Global",
- nicAddrs: []tcpip.Address{linkLocalAddr1, uniqueLocalAddr1, uniqueLocalAddr2},
- connectAddr: globalAddr2,
- expectedLocalAddr: uniqueLocalAddr1,
- },
- {
- name: "Link Local for Global",
- nicAddrs: []tcpip.Address{linkLocalAddr1, linkLocalAddr2},
- connectAddr: globalAddr2,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Link Local for Unique Local",
- nicAddrs: []tcpip.Address{linkLocalAddr1, linkLocalAddr2},
- connectAddr: uniqueLocalAddr2,
- expectedLocalAddr: linkLocalAddr1,
- },
- {
- name: "Temp Global for Global",
- slaacPrefixForTempAddrBeforeNICAddrAdd: prefix1,
- slaacPrefixForTempAddrAfterNICAddrAdd: prefix2,
- connectAddr: globalAddr1,
- expectedLocalAddr: tempGlobalAddr2,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- e := channel.New(0, 1280, linkAddr1)
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- TransportProtocols: []stack.TransportProtocol{udp.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- HandleRAs: true,
- AutoGenGlobalAddresses: true,
- AutoGenTempGlobalAddresses: true,
- },
- NDPDisp: &ndpDispatcher{},
- })
- if err := s.CreateNIC(nicID, e); err != nil {
- t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
- }
- s.SetRouteTable([]tcpip.Route{{
- Destination: header.IPv6EmptySubnet,
- Gateway: llAddr3,
- NIC: nicID,
- }})
- s.AddLinkAddress(nicID, llAddr3, linkAddr3)
-
- if test.slaacPrefixForTempAddrBeforeNICAddrAdd != (tcpip.AddressWithPrefix{}) {
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, 0, test.slaacPrefixForTempAddrBeforeNICAddrAdd, true, true, lifetimeSeconds, lifetimeSeconds))
- }
-
- for _, a := range test.nicAddrs {
- if err := s.AddAddress(nicID, ipv6.ProtocolNumber, a); err != nil {
- t.Errorf("s.AddAddress(%d, %d, %s): %s", nicID, ipv6.ProtocolNumber, a, err)
- }
- }
-
- if test.slaacPrefixForTempAddrAfterNICAddrAdd != (tcpip.AddressWithPrefix{}) {
- e.InjectInbound(header.IPv6ProtocolNumber, raBufWithPI(llAddr3, 0, test.slaacPrefixForTempAddrAfterNICAddrAdd, true, true, lifetimeSeconds, lifetimeSeconds))
- }
-
- if t.Failed() {
- t.FailNow()
- }
-
- if got := addrForNewConnectionTo(t, s, tcpip.FullAddress{Addr: test.connectAddr, NIC: nicID, Port: 1234}); got != test.expectedLocalAddr {
- t.Errorf("got local address = %s, want = %s", got, test.expectedLocalAddr)
- }
- })
- }
-}
-
-func TestAddRemoveIPv4BroadcastAddressOnNICEnableDisable(t *testing.T) {
- const nicID = 1
- broadcastAddr := tcpip.ProtocolAddress{
- Protocol: header.IPv4ProtocolNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{
- Address: header.IPv4Broadcast,
- PrefixLen: 32,
- },
- }
-
- e := loopback.New()
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv4.NewProtocol()},
- })
- nicOpts := stack.NICOptions{Disabled: true}
- if err := s.CreateNICWithOptions(nicID, e, nicOpts); err != nil {
- t.Fatalf("CreateNIC(%d, _, %+v) = %s", nicID, nicOpts, err)
- }
-
- {
- allStackAddrs := s.AllAddresses()
- if allNICAddrs, ok := allStackAddrs[nicID]; !ok {
- t.Fatalf("entry for %d missing from allStackAddrs = %+v", nicID, allStackAddrs)
- } else if containsAddr(allNICAddrs, broadcastAddr) {
- t.Fatalf("got allNICAddrs = %+v, don't want = %+v", allNICAddrs, broadcastAddr)
- }
- }
-
- // Enabling the NIC should add the IPv4 broadcast address.
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
-
- {
- allStackAddrs := s.AllAddresses()
- if allNICAddrs, ok := allStackAddrs[nicID]; !ok {
- t.Fatalf("entry for %d missing from allStackAddrs = %+v", nicID, allStackAddrs)
- } else if !containsAddr(allNICAddrs, broadcastAddr) {
- t.Fatalf("got allNICAddrs = %+v, want = %+v", allNICAddrs, broadcastAddr)
- }
- }
-
- // Disabling the NIC should remove the IPv4 broadcast address.
- if err := s.DisableNIC(nicID); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID, err)
- }
-
- {
- allStackAddrs := s.AllAddresses()
- if allNICAddrs, ok := allStackAddrs[nicID]; !ok {
- t.Fatalf("entry for %d missing from allStackAddrs = %+v", nicID, allStackAddrs)
- } else if containsAddr(allNICAddrs, broadcastAddr) {
- t.Fatalf("got allNICAddrs = %+v, don't want = %+v", allNICAddrs, broadcastAddr)
- }
- }
-}
-
-// TestLeaveIPv6SolicitedNodeAddrBeforeAddrRemoval tests that removing an IPv6
-// address after leaving its solicited node multicast address does not result in
-// an error.
-func TestLeaveIPv6SolicitedNodeAddrBeforeAddrRemoval(t *testing.T) {
- const nicID = 1
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- })
- e := channel.New(10, 1280, linkAddr1)
- if err := s.CreateNIC(1, e); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID, err)
- }
-
- if err := s.AddAddress(nicID, ipv6.ProtocolNumber, addr1); err != nil {
- t.Fatalf("AddAddress(%d, %d, %s): %s", nicID, ipv6.ProtocolNumber, addr1, err)
- }
-
- // The NIC should have joined addr1's solicited node multicast address.
- snmc := header.SolicitedNodeAddr(addr1)
- in, err := s.IsInGroup(nicID, snmc)
- if err != nil {
- t.Fatalf("IsInGroup(%d, %s): %s", nicID, snmc, err)
- }
- if !in {
- t.Fatalf("got IsInGroup(%d, %s) = false, want = true", nicID, snmc)
- }
-
- if err := s.LeaveGroup(ipv6.ProtocolNumber, nicID, snmc); err != nil {
- t.Fatalf("LeaveGroup(%d, %d, %s): %s", ipv6.ProtocolNumber, nicID, snmc, err)
- }
- in, err = s.IsInGroup(nicID, snmc)
- if err != nil {
- t.Fatalf("IsInGroup(%d, %s): %s", nicID, snmc, err)
- }
- if in {
- t.Fatalf("got IsInGroup(%d, %s) = true, want = false", nicID, snmc)
- }
-
- if err := s.RemoveAddress(nicID, addr1); err != nil {
- t.Fatalf("RemoveAddress(%d, %s) = %s", nicID, addr1, err)
- }
-}
-
-func TestJoinLeaveMulticastOnNICEnableDisable(t *testing.T) {
- const nicID = 1
-
- tests := []struct {
- name string
- proto tcpip.NetworkProtocolNumber
- addr tcpip.Address
- }{
- {
- name: "IPv6 All-Nodes",
- proto: header.IPv6ProtocolNumber,
- addr: header.IPv6AllNodesMulticastAddress,
- },
- {
- name: "IPv4 All-Systems",
- proto: header.IPv4ProtocolNumber,
- addr: header.IPv4AllSystems,
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- e := loopback.New()
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv4.NewProtocol(), ipv6.NewProtocol()},
- })
- nicOpts := stack.NICOptions{Disabled: true}
- if err := s.CreateNICWithOptions(nicID, e, nicOpts); err != nil {
- t.Fatalf("CreateNIC(%d, _, %+v) = %s", nicID, nicOpts, err)
- }
-
- // Should not be in the multicast group yet because the NIC has not been
- // enabled yet.
- if isInGroup, err := s.IsInGroup(nicID, test.addr); err != nil {
- t.Fatalf("IsInGroup(%d, %s): %s", nicID, test.addr, err)
- } else if isInGroup {
- t.Fatalf("got IsInGroup(%d, %s) = true, want = false", nicID, test.addr)
- }
-
- // The all-nodes multicast group should be joined when the NIC is enabled.
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
-
- if isInGroup, err := s.IsInGroup(nicID, test.addr); err != nil {
- t.Fatalf("IsInGroup(%d, %s): %s", nicID, test.addr, err)
- } else if !isInGroup {
- t.Fatalf("got IsInGroup(%d, %s) = false, want = true", nicID, test.addr)
- }
-
- // The multicast group should be left when the NIC is disabled.
- if err := s.DisableNIC(nicID); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID, err)
- }
-
- if isInGroup, err := s.IsInGroup(nicID, test.addr); err != nil {
- t.Fatalf("IsInGroup(%d, %s): %s", nicID, test.addr, err)
- } else if isInGroup {
- t.Fatalf("got IsInGroup(%d, %s) = true, want = false", nicID, test.addr)
- }
-
- // The all-nodes multicast group should be joined when the NIC is enabled.
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
-
- if isInGroup, err := s.IsInGroup(nicID, test.addr); err != nil {
- t.Fatalf("IsInGroup(%d, %s): %s", nicID, test.addr, err)
- } else if !isInGroup {
- t.Fatalf("got IsInGroup(%d, %s) = false, want = true", nicID, test.addr)
- }
-
- // Leaving the group before disabling the NIC should not cause an error.
- if err := s.LeaveGroup(test.proto, nicID, test.addr); err != nil {
- t.Fatalf("s.LeaveGroup(%d, %d, %s): %s", test.proto, nicID, test.addr, err)
- }
-
- if err := s.DisableNIC(nicID); err != nil {
- t.Fatalf("s.DisableNIC(%d): %s", nicID, err)
- }
-
- if isInGroup, err := s.IsInGroup(nicID, test.addr); err != nil {
- t.Fatalf("IsInGroup(%d, %s): %s", nicID, test.addr, err)
- } else if isInGroup {
- t.Fatalf("got IsInGroup(%d, %s) = true, want = false", nicID, test.addr)
- }
- })
- }
-}
-
-// TestDoDADWhenNICEnabled tests that IPv6 endpoints that were added while a NIC
-// was disabled have DAD performed on them when the NIC is enabled.
-func TestDoDADWhenNICEnabled(t *testing.T) {
- const dadTransmits = 1
- const retransmitTimer = time.Second
- const nicID = 1
-
- ndpDisp := ndpDispatcher{
- dadC: make(chan ndpDADEvent),
- }
- opts := stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- NDPConfigs: stack.NDPConfigurations{
- DupAddrDetectTransmits: dadTransmits,
- RetransmitTimer: retransmitTimer,
- },
- NDPDisp: &ndpDisp,
- }
-
- e := channel.New(dadTransmits, 1280, linkAddr1)
- s := stack.New(opts)
- nicOpts := stack.NICOptions{Disabled: true}
- if err := s.CreateNICWithOptions(nicID, e, nicOpts); err != nil {
- t.Fatalf("CreateNIC(%d, _, %+v) = %s", nicID, nicOpts, err)
- }
-
- addr := tcpip.ProtocolAddress{
- Protocol: header.IPv6ProtocolNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{
- Address: llAddr1,
- PrefixLen: 128,
- },
- }
- if err := s.AddProtocolAddress(nicID, addr); err != nil {
- t.Fatalf("AddProtocolAddress(%d, %+v): %s", nicID, addr, err)
- }
-
- // Address should be in the list of all addresses.
- if addrs := s.AllAddresses()[nicID]; !containsV6Addr(addrs, addr.AddressWithPrefix) {
- t.Fatalf("got s.AllAddresses()[%d] = %+v, want = %+v", nicID, addrs, addr)
- }
-
- // Address should be tentative so it should not be a main address.
- got, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); got != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, got, want)
- }
-
- // Enabling the NIC should start DAD for the address.
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
- if addrs := s.AllAddresses()[nicID]; !containsV6Addr(addrs, addr.AddressWithPrefix) {
- t.Fatalf("got s.AllAddresses()[%d] = %+v, want = %+v", nicID, addrs, addr)
- }
-
- // Address should not be considered bound to the NIC yet (DAD ongoing).
- got, err = s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if want := (tcpip.AddressWithPrefix{}); got != want {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, got, want)
- }
-
- // Wait for DAD to resolve.
- select {
- case <-time.After(dadTransmits*retransmitTimer + defaultAsyncPositiveEventTimeout):
- t.Fatal("timed out waiting for DAD resolution")
- case e := <-ndpDisp.dadC:
- if diff := checkDADEvent(e, nicID, addr.AddressWithPrefix.Address, true, nil); diff != "" {
- t.Errorf("dad event mismatch (-want +got):\n%s", diff)
- }
- }
- if addrs := s.AllAddresses()[nicID]; !containsV6Addr(addrs, addr.AddressWithPrefix) {
- t.Fatalf("got s.AllAddresses()[%d] = %+v, want = %+v", nicID, addrs, addr)
- }
- got, err = s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if got != addr.AddressWithPrefix {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = %s, want = %s", nicID, header.IPv6ProtocolNumber, got, addr.AddressWithPrefix)
- }
-
- // Enabling the NIC again should be a no-op.
- if err := s.EnableNIC(nicID); err != nil {
- t.Fatalf("s.EnableNIC(%d): %s", nicID, err)
- }
- if addrs := s.AllAddresses()[nicID]; !containsV6Addr(addrs, addr.AddressWithPrefix) {
- t.Fatalf("got s.AllAddresses()[%d] = %+v, want = %+v", nicID, addrs, addr)
- }
- got, err = s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
- if err != nil {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (_, %v), want = (_, nil)", nicID, header.IPv6ProtocolNumber, err)
- }
- if got != addr.AddressWithPrefix {
- t.Fatalf("got stack.GetMainNICAddress(%d, %d) = (%s, nil), want = (%s, nil)", nicID, header.IPv6ProtocolNumber, got, addr.AddressWithPrefix)
- }
-}
-
-func TestStackReceiveBufferSizeOption(t *testing.T) {
- const sMin = stack.MinBufferSize
- testCases := []struct {
- name string
- rs stack.ReceiveBufferSizeOption
- err *tcpip.Error
- }{
- // Invalid configurations.
- {"min_below_zero", stack.ReceiveBufferSizeOption{Min: -1, Default: sMin, Max: sMin}, tcpip.ErrInvalidOptionValue},
- {"min_zero", stack.ReceiveBufferSizeOption{Min: 0, Default: sMin, Max: sMin}, tcpip.ErrInvalidOptionValue},
- {"default_below_min", stack.ReceiveBufferSizeOption{Min: sMin, Default: sMin - 1, Max: sMin - 1}, tcpip.ErrInvalidOptionValue},
- {"default_above_max", stack.ReceiveBufferSizeOption{Min: sMin, Default: sMin + 1, Max: sMin}, tcpip.ErrInvalidOptionValue},
- {"max_below_min", stack.ReceiveBufferSizeOption{Min: sMin, Default: sMin + 1, Max: sMin - 1}, tcpip.ErrInvalidOptionValue},
-
- // Valid Configurations
- {"in_ascending_order", stack.ReceiveBufferSizeOption{Min: sMin, Default: sMin + 1, Max: sMin + 2}, nil},
- {"all_equal", stack.ReceiveBufferSizeOption{Min: sMin, Default: sMin, Max: sMin}, nil},
- {"min_default_equal", stack.ReceiveBufferSizeOption{Min: sMin, Default: sMin, Max: sMin + 1}, nil},
- {"default_max_equal", stack.ReceiveBufferSizeOption{Min: sMin, Default: sMin + 1, Max: sMin + 1}, nil},
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- s := stack.New(stack.Options{})
- defer s.Close()
- if err := s.SetOption(tc.rs); err != tc.err {
- t.Fatalf("s.SetOption(%#v) = %v, want: %v", tc.rs, err, tc.err)
- }
- var rs stack.ReceiveBufferSizeOption
- if tc.err == nil {
- if err := s.Option(&rs); err != nil {
- t.Fatalf("s.Option(%#v) = %v, want: nil", rs, err)
- }
- if got, want := rs, tc.rs; got != want {
- t.Fatalf("s.Option(..) returned unexpected value got: %#v, want: %#v", got, want)
- }
- }
- })
- }
-}
-
-func TestStackSendBufferSizeOption(t *testing.T) {
- const sMin = stack.MinBufferSize
- testCases := []struct {
- name string
- ss stack.SendBufferSizeOption
- err *tcpip.Error
- }{
- // Invalid configurations.
- {"min_below_zero", stack.SendBufferSizeOption{Min: -1, Default: sMin, Max: sMin}, tcpip.ErrInvalidOptionValue},
- {"min_zero", stack.SendBufferSizeOption{Min: 0, Default: sMin, Max: sMin}, tcpip.ErrInvalidOptionValue},
- {"default_below_min", stack.SendBufferSizeOption{Min: 0, Default: sMin - 1, Max: sMin - 1}, tcpip.ErrInvalidOptionValue},
- {"default_above_max", stack.SendBufferSizeOption{Min: 0, Default: sMin + 1, Max: sMin}, tcpip.ErrInvalidOptionValue},
- {"max_below_min", stack.SendBufferSizeOption{Min: sMin, Default: sMin + 1, Max: sMin - 1}, tcpip.ErrInvalidOptionValue},
-
- // Valid Configurations
- {"in_ascending_order", stack.SendBufferSizeOption{Min: sMin, Default: sMin + 1, Max: sMin + 2}, nil},
- {"all_equal", stack.SendBufferSizeOption{Min: sMin, Default: sMin, Max: sMin}, nil},
- {"min_default_equal", stack.SendBufferSizeOption{Min: sMin, Default: sMin, Max: sMin + 1}, nil},
- {"default_max_equal", stack.SendBufferSizeOption{Min: sMin, Default: sMin + 1, Max: sMin + 1}, nil},
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- s := stack.New(stack.Options{})
- defer s.Close()
- if err := s.SetOption(tc.ss); err != tc.err {
- t.Fatalf("s.SetOption(%+v) = %v, want: %v", tc.ss, err, tc.err)
- }
- var ss stack.SendBufferSizeOption
- if tc.err == nil {
- if err := s.Option(&ss); err != nil {
- t.Fatalf("s.Option(%+v) = %v, want: nil", ss, err)
- }
- if got, want := ss, tc.ss; got != want {
- t.Fatalf("s.Option(..) returned unexpected value got: %#v, want: %#v", got, want)
- }
- }
- })
- }
-}
-
-func TestOutgoingSubnetBroadcast(t *testing.T) {
- const (
- unspecifiedNICID = 0
- nicID1 = 1
- )
-
- defaultAddr := tcpip.AddressWithPrefix{
- Address: header.IPv4Any,
- PrefixLen: 0,
- }
- defaultSubnet := defaultAddr.Subnet()
- ipv4Addr := tcpip.AddressWithPrefix{
- Address: "\xc0\xa8\x01\x3a",
- PrefixLen: 24,
- }
- ipv4Subnet := ipv4Addr.Subnet()
- ipv4SubnetBcast := ipv4Subnet.Broadcast()
- ipv4Gateway := tcpip.Address("\xc0\xa8\x01\x01")
- ipv4AddrPrefix31 := tcpip.AddressWithPrefix{
- Address: "\xc0\xa8\x01\x3a",
- PrefixLen: 31,
- }
- ipv4Subnet31 := ipv4AddrPrefix31.Subnet()
- ipv4Subnet31Bcast := ipv4Subnet31.Broadcast()
- ipv4AddrPrefix32 := tcpip.AddressWithPrefix{
- Address: "\xc0\xa8\x01\x3a",
- PrefixLen: 32,
- }
- ipv4Subnet32 := ipv4AddrPrefix32.Subnet()
- ipv4Subnet32Bcast := ipv4Subnet32.Broadcast()
- ipv6Addr := tcpip.AddressWithPrefix{
- Address: "\x20\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01",
- PrefixLen: 64,
- }
- ipv6Subnet := ipv6Addr.Subnet()
- ipv6SubnetBcast := ipv6Subnet.Broadcast()
- remNetAddr := tcpip.AddressWithPrefix{
- Address: "\x64\x0a\x7b\x18",
- PrefixLen: 24,
- }
- remNetSubnet := remNetAddr.Subnet()
- remNetSubnetBcast := remNetSubnet.Broadcast()
-
- tests := []struct {
- name string
- nicAddr tcpip.ProtocolAddress
- routes []tcpip.Route
- remoteAddr tcpip.Address
- expectedRoute stack.Route
- }{
- // Broadcast to a locally attached subnet populates the broadcast MAC.
- {
- name: "IPv4 Broadcast to local subnet",
- nicAddr: tcpip.ProtocolAddress{
- Protocol: header.IPv4ProtocolNumber,
- AddressWithPrefix: ipv4Addr,
- },
- routes: []tcpip.Route{
- {
- Destination: ipv4Subnet,
- NIC: nicID1,
- },
- },
- remoteAddr: ipv4SubnetBcast,
- expectedRoute: stack.Route{
- LocalAddress: ipv4Addr.Address,
- RemoteAddress: ipv4SubnetBcast,
- RemoteLinkAddress: header.EthernetBroadcastAddress,
- NetProto: header.IPv4ProtocolNumber,
- Loop: stack.PacketOut,
- },
- },
- // Broadcast to a locally attached /31 subnet does not populate the
- // broadcast MAC.
- {
- name: "IPv4 Broadcast to local /31 subnet",
- nicAddr: tcpip.ProtocolAddress{
- Protocol: header.IPv4ProtocolNumber,
- AddressWithPrefix: ipv4AddrPrefix31,
- },
- routes: []tcpip.Route{
- {
- Destination: ipv4Subnet31,
- NIC: nicID1,
- },
- },
- remoteAddr: ipv4Subnet31Bcast,
- expectedRoute: stack.Route{
- LocalAddress: ipv4AddrPrefix31.Address,
- RemoteAddress: ipv4Subnet31Bcast,
- NetProto: header.IPv4ProtocolNumber,
- Loop: stack.PacketOut,
- },
- },
- // Broadcast to a locally attached /32 subnet does not populate the
- // broadcast MAC.
- {
- name: "IPv4 Broadcast to local /32 subnet",
- nicAddr: tcpip.ProtocolAddress{
- Protocol: header.IPv4ProtocolNumber,
- AddressWithPrefix: ipv4AddrPrefix32,
- },
- routes: []tcpip.Route{
- {
- Destination: ipv4Subnet32,
- NIC: nicID1,
- },
- },
- remoteAddr: ipv4Subnet32Bcast,
- expectedRoute: stack.Route{
- LocalAddress: ipv4AddrPrefix32.Address,
- RemoteAddress: ipv4Subnet32Bcast,
- NetProto: header.IPv4ProtocolNumber,
- Loop: stack.PacketOut,
- },
- },
- // IPv6 has no notion of a broadcast.
- {
- name: "IPv6 'Broadcast' to local subnet",
- nicAddr: tcpip.ProtocolAddress{
- Protocol: header.IPv6ProtocolNumber,
- AddressWithPrefix: ipv6Addr,
- },
- routes: []tcpip.Route{
- {
- Destination: ipv6Subnet,
- NIC: nicID1,
- },
- },
- remoteAddr: ipv6SubnetBcast,
- expectedRoute: stack.Route{
- LocalAddress: ipv6Addr.Address,
- RemoteAddress: ipv6SubnetBcast,
- NetProto: header.IPv6ProtocolNumber,
- Loop: stack.PacketOut,
- },
- },
- // Broadcast to a remote subnet in the route table is send to the next-hop
- // gateway.
- {
- name: "IPv4 Broadcast to remote subnet",
- nicAddr: tcpip.ProtocolAddress{
- Protocol: header.IPv4ProtocolNumber,
- AddressWithPrefix: ipv4Addr,
- },
- routes: []tcpip.Route{
- {
- Destination: remNetSubnet,
- Gateway: ipv4Gateway,
- NIC: nicID1,
- },
- },
- remoteAddr: remNetSubnetBcast,
- expectedRoute: stack.Route{
- LocalAddress: ipv4Addr.Address,
- RemoteAddress: remNetSubnetBcast,
- NextHop: ipv4Gateway,
- NetProto: header.IPv4ProtocolNumber,
- Loop: stack.PacketOut,
- },
- },
- // Broadcast to an unknown subnet follows the default route. Note that this
- // is essentially just routing an unknown destination IP, because w/o any
- // subnet prefix information a subnet broadcast address is just a normal IP.
- {
- name: "IPv4 Broadcast to unknown subnet",
- nicAddr: tcpip.ProtocolAddress{
- Protocol: header.IPv4ProtocolNumber,
- AddressWithPrefix: ipv4Addr,
- },
- routes: []tcpip.Route{
- {
- Destination: defaultSubnet,
- Gateway: ipv4Gateway,
- NIC: nicID1,
- },
- },
- remoteAddr: remNetSubnetBcast,
- expectedRoute: stack.Route{
- LocalAddress: ipv4Addr.Address,
- RemoteAddress: remNetSubnetBcast,
- NextHop: ipv4Gateway,
- NetProto: header.IPv4ProtocolNumber,
- Loop: stack.PacketOut,
- },
- },
- }
-
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv4.NewProtocol(), ipv6.NewProtocol()},
- })
- ep := channel.New(0, defaultMTU, "")
- if err := s.CreateNIC(nicID1, ep); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID1, err)
- }
- if err := s.AddProtocolAddress(nicID1, test.nicAddr); err != nil {
- t.Fatalf("AddProtocolAddress(%d, %+v): %s", nicID1, test.nicAddr, err)
- }
-
- s.SetRouteTable(test.routes)
-
- var netProto tcpip.NetworkProtocolNumber
- switch l := len(test.remoteAddr); l {
- case header.IPv4AddressSize:
- netProto = header.IPv4ProtocolNumber
- case header.IPv6AddressSize:
- netProto = header.IPv6ProtocolNumber
- default:
- t.Fatalf("got unexpected address length = %d bytes", l)
- }
-
- if r, err := s.FindRoute(unspecifiedNICID, "" /* localAddr */, test.remoteAddr, netProto, false /* multicastLoop */); err != nil {
- t.Fatalf("FindRoute(%d, '', %s, %d): %s", unspecifiedNICID, test.remoteAddr, netProto, err)
- } else if diff := cmp.Diff(r, test.expectedRoute, cmpopts.IgnoreUnexported(r)); diff != "" {
- t.Errorf("route mismatch (-want +got):\n%s", diff)
- }
- })
- }
-}
-
-func TestResolveWith(t *testing.T) {
- const (
- unspecifiedNICID = 0
- nicID = 1
- )
-
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv4.NewProtocol(), arp.NewProtocol()},
- })
- ep := channel.New(0, defaultMTU, "")
- ep.LinkEPCapabilities |= stack.CapabilityResolutionRequired
- if err := s.CreateNIC(nicID, ep); err != nil {
- t.Fatalf("CreateNIC(%d, _): %s", nicID, err)
- }
- addr := tcpip.ProtocolAddress{
- Protocol: header.IPv4ProtocolNumber,
- AddressWithPrefix: tcpip.AddressWithPrefix{
- Address: tcpip.Address(net.ParseIP("192.168.1.58").To4()),
- PrefixLen: 24,
- },
- }
- if err := s.AddProtocolAddress(nicID, addr); err != nil {
- t.Fatalf("AddProtocolAddress(%d, %+v): %s", nicID, addr, err)
- }
-
- s.SetRouteTable([]tcpip.Route{{Destination: header.IPv4EmptySubnet, NIC: nicID}})
-
- remoteAddr := tcpip.Address(net.ParseIP("192.168.1.59").To4())
- r, err := s.FindRoute(unspecifiedNICID, "" /* localAddr */, remoteAddr, header.IPv4ProtocolNumber, false /* multicastLoop */)
- if err != nil {
- t.Fatalf("FindRoute(%d, '', %s, %d): %s", unspecifiedNICID, remoteAddr, header.IPv4ProtocolNumber, err)
- }
- defer r.Release()
-
- // Should initially require resolution.
- if !r.IsResolutionRequired() {
- t.Fatal("got r.IsResolutionRequired() = false, want = true")
- }
-
- // Manually resolving the route should no longer require resolution.
- r.ResolveWith("\x01")
- if r.IsResolutionRequired() {
- t.Fatal("got r.IsResolutionRequired() = true, want = false")
- }
-}
diff --git a/pkg/tcpip/stack/transport_demuxer_test.go b/pkg/tcpip/stack/transport_demuxer_test.go
deleted file mode 100644
index 4d6d62eec..000000000
--- a/pkg/tcpip/stack/transport_demuxer_test.go
+++ /dev/null
@@ -1,388 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack_test
-
-import (
- "math"
- "math/rand"
- "testing"
-
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
- "gvisor.dev/gvisor/pkg/tcpip/header"
- "gvisor.dev/gvisor/pkg/tcpip/link/channel"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
- "gvisor.dev/gvisor/pkg/tcpip/ports"
- "gvisor.dev/gvisor/pkg/tcpip/stack"
- "gvisor.dev/gvisor/pkg/tcpip/transport/udp"
- "gvisor.dev/gvisor/pkg/waiter"
-)
-
-const (
- testSrcAddrV6 = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01"
- testDstAddrV6 = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02"
-
- testSrcAddrV4 = "\x0a\x00\x00\x01"
- testDstAddrV4 = "\x0a\x00\x00\x02"
-
- testDstPort = 1234
- testSrcPort = 4096
-)
-
-type testContext struct {
- linkEps map[tcpip.NICID]*channel.Endpoint
- s *stack.Stack
- wq waiter.Queue
-}
-
-// newDualTestContextMultiNIC creates the testing context and also linkEpIDs NICs.
-func newDualTestContextMultiNIC(t *testing.T, mtu uint32, linkEpIDs []tcpip.NICID) *testContext {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv4.NewProtocol(), ipv6.NewProtocol()},
- TransportProtocols: []stack.TransportProtocol{udp.NewProtocol()},
- })
- linkEps := make(map[tcpip.NICID]*channel.Endpoint)
- for _, linkEpID := range linkEpIDs {
- channelEp := channel.New(256, mtu, "")
- if err := s.CreateNIC(linkEpID, channelEp); err != nil {
- t.Fatalf("CreateNIC failed: %s", err)
- }
- linkEps[linkEpID] = channelEp
-
- if err := s.AddAddress(linkEpID, ipv4.ProtocolNumber, testDstAddrV4); err != nil {
- t.Fatalf("AddAddress IPv4 failed: %s", err)
- }
-
- if err := s.AddAddress(linkEpID, ipv6.ProtocolNumber, testDstAddrV6); err != nil {
- t.Fatalf("AddAddress IPv6 failed: %s", err)
- }
- }
-
- s.SetRouteTable([]tcpip.Route{
- {Destination: header.IPv4EmptySubnet, NIC: 1},
- {Destination: header.IPv6EmptySubnet, NIC: 1},
- })
-
- return &testContext{
- s: s,
- linkEps: linkEps,
- }
-}
-
-type headers struct {
- srcPort, dstPort uint16
-}
-
-func newPayload() []byte {
- b := make([]byte, 30+rand.Intn(100))
- for i := range b {
- b[i] = byte(rand.Intn(256))
- }
- return b
-}
-
-func (c *testContext) sendV4Packet(payload []byte, h *headers, linkEpID tcpip.NICID) {
- buf := buffer.NewView(header.UDPMinimumSize + header.IPv4MinimumSize + len(payload))
- payloadStart := len(buf) - len(payload)
- copy(buf[payloadStart:], payload)
-
- // Initialize the IP header.
- ip := header.IPv4(buf)
- ip.Encode(&header.IPv4Fields{
- IHL: header.IPv4MinimumSize,
- TOS: 0x80,
- TotalLength: uint16(len(buf)),
- TTL: 65,
- Protocol: uint8(udp.ProtocolNumber),
- SrcAddr: testSrcAddrV4,
- DstAddr: testDstAddrV4,
- })
- ip.SetChecksum(^ip.CalculateChecksum())
-
- // Initialize the UDP header.
- u := header.UDP(buf[header.IPv4MinimumSize:])
- u.Encode(&header.UDPFields{
- SrcPort: h.srcPort,
- DstPort: h.dstPort,
- Length: uint16(header.UDPMinimumSize + len(payload)),
- })
-
- // Calculate the UDP pseudo-header checksum.
- xsum := header.PseudoHeaderChecksum(udp.ProtocolNumber, testSrcAddrV4, testDstAddrV4, uint16(len(u)))
-
- // Calculate the UDP checksum and set it.
- xsum = header.Checksum(payload, xsum)
- u.SetChecksum(^u.CalculateChecksum(xsum))
-
- // Inject packet.
- pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- })
- c.linkEps[linkEpID].InjectInbound(ipv4.ProtocolNumber, pkt)
-}
-
-func (c *testContext) sendV6Packet(payload []byte, h *headers, linkEpID tcpip.NICID) {
- // Allocate a buffer for data and headers.
- buf := buffer.NewView(header.UDPMinimumSize + header.IPv6MinimumSize + len(payload))
- copy(buf[len(buf)-len(payload):], payload)
-
- // Initialize the IP header.
- ip := header.IPv6(buf)
- ip.Encode(&header.IPv6Fields{
- PayloadLength: uint16(header.UDPMinimumSize + len(payload)),
- NextHeader: uint8(udp.ProtocolNumber),
- HopLimit: 65,
- SrcAddr: testSrcAddrV6,
- DstAddr: testDstAddrV6,
- })
-
- // Initialize the UDP header.
- u := header.UDP(buf[header.IPv6MinimumSize:])
- u.Encode(&header.UDPFields{
- SrcPort: h.srcPort,
- DstPort: h.dstPort,
- Length: uint16(header.UDPMinimumSize + len(payload)),
- })
-
- // Calculate the UDP pseudo-header checksum.
- xsum := header.PseudoHeaderChecksum(udp.ProtocolNumber, testSrcAddrV6, testDstAddrV6, uint16(len(u)))
-
- // Calculate the UDP checksum and set it.
- xsum = header.Checksum(payload, xsum)
- u.SetChecksum(^u.CalculateChecksum(xsum))
-
- // Inject packet.
- pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- })
- c.linkEps[linkEpID].InjectInbound(ipv6.ProtocolNumber, pkt)
-}
-
-func TestTransportDemuxerRegister(t *testing.T) {
- for _, test := range []struct {
- name string
- proto tcpip.NetworkProtocolNumber
- want *tcpip.Error
- }{
- {"failure", ipv6.ProtocolNumber, tcpip.ErrUnknownProtocol},
- {"success", ipv4.ProtocolNumber, nil},
- } {
- t.Run(test.name, func(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv4.NewProtocol()},
- TransportProtocols: []stack.TransportProtocol{udp.NewProtocol()},
- })
- var wq waiter.Queue
- ep, err := s.NewEndpoint(udp.ProtocolNumber, ipv4.ProtocolNumber, &wq)
- if err != nil {
- t.Fatal(err)
- }
- tEP, ok := ep.(stack.TransportEndpoint)
- if !ok {
- t.Fatalf("%T does not implement stack.TransportEndpoint", ep)
- }
- if got, want := s.RegisterTransportEndpoint(0, []tcpip.NetworkProtocolNumber{test.proto}, udp.ProtocolNumber, stack.TransportEndpointID{}, tEP, ports.Flags{}, 0), test.want; got != want {
- t.Fatalf("s.RegisterTransportEndpoint(...) = %s, want %s", got, want)
- }
- })
- }
-}
-
-// TestBindToDeviceDistribution injects varied packets on input devices and checks that
-// the distribution of packets received matches expectations.
-func TestBindToDeviceDistribution(t *testing.T) {
- type endpointSockopts struct {
- reuse bool
- bindToDevice tcpip.NICID
- }
- for _, test := range []struct {
- name string
- // endpoints will received the inject packets.
- endpoints []endpointSockopts
- // wantDistributions is the want ratio of packets received on each
- // endpoint for each NIC on which packets are injected.
- wantDistributions map[tcpip.NICID][]float64
- }{
- {
- "BindPortReuse",
- // 5 endpoints that all have reuse set.
- []endpointSockopts{
- {reuse: true, bindToDevice: 0},
- {reuse: true, bindToDevice: 0},
- {reuse: true, bindToDevice: 0},
- {reuse: true, bindToDevice: 0},
- {reuse: true, bindToDevice: 0},
- },
- map[tcpip.NICID][]float64{
- // Injected packets on dev0 get distributed evenly.
- 1: {0.2, 0.2, 0.2, 0.2, 0.2},
- },
- },
- {
- "BindToDevice",
- // 3 endpoints with various bindings.
- []endpointSockopts{
- {reuse: false, bindToDevice: 1},
- {reuse: false, bindToDevice: 2},
- {reuse: false, bindToDevice: 3},
- },
- map[tcpip.NICID][]float64{
- // Injected packets on dev0 go only to the endpoint bound to dev0.
- 1: {1, 0, 0},
- // Injected packets on dev1 go only to the endpoint bound to dev1.
- 2: {0, 1, 0},
- // Injected packets on dev2 go only to the endpoint bound to dev2.
- 3: {0, 0, 1},
- },
- },
- {
- "ReuseAndBindToDevice",
- // 6 endpoints with various bindings.
- []endpointSockopts{
- {reuse: true, bindToDevice: 1},
- {reuse: true, bindToDevice: 1},
- {reuse: true, bindToDevice: 2},
- {reuse: true, bindToDevice: 2},
- {reuse: true, bindToDevice: 2},
- {reuse: true, bindToDevice: 0},
- },
- map[tcpip.NICID][]float64{
- // Injected packets on dev0 get distributed among endpoints bound to
- // dev0.
- 1: {0.5, 0.5, 0, 0, 0, 0},
- // Injected packets on dev1 get distributed among endpoints bound to
- // dev1 or unbound.
- 2: {0, 0, 1. / 3, 1. / 3, 1. / 3, 0},
- // Injected packets on dev999 go only to the unbound.
- 1000: {0, 0, 0, 0, 0, 1},
- },
- },
- } {
- for protoName, netProtoNum := range map[string]tcpip.NetworkProtocolNumber{
- "IPv4": ipv4.ProtocolNumber,
- "IPv6": ipv6.ProtocolNumber,
- } {
- for device, wantDistribution := range test.wantDistributions {
- t.Run(test.name+protoName+string(device), func(t *testing.T) {
- var devices []tcpip.NICID
- for d := range test.wantDistributions {
- devices = append(devices, d)
- }
- c := newDualTestContextMultiNIC(t, defaultMTU, devices)
-
- eps := make(map[tcpip.Endpoint]int)
-
- pollChannel := make(chan tcpip.Endpoint)
- for i, endpoint := range test.endpoints {
- // Try to receive the data.
- wq := waiter.Queue{}
- we, ch := waiter.NewChannelEntry(nil)
- wq.EventRegister(&we, waiter.EventIn)
- defer wq.EventUnregister(&we)
- defer close(ch)
-
- var err *tcpip.Error
- ep, err := c.s.NewEndpoint(udp.ProtocolNumber, netProtoNum, &wq)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %s", err)
- }
- eps[ep] = i
-
- go func(ep tcpip.Endpoint) {
- for range ch {
- pollChannel <- ep
- }
- }(ep)
-
- defer ep.Close()
- if err := ep.SetSockOptBool(tcpip.ReusePortOption, endpoint.reuse); err != nil {
- t.Fatalf("SetSockOptBool(ReusePortOption, %t) on endpoint %d failed: %s", endpoint.reuse, i, err)
- }
- bindToDeviceOption := tcpip.BindToDeviceOption(endpoint.bindToDevice)
- if err := ep.SetSockOpt(&bindToDeviceOption); err != nil {
- t.Fatalf("SetSockOpt(&%T(%d)) on endpoint %d failed: %s", bindToDeviceOption, bindToDeviceOption, i, err)
- }
-
- var dstAddr tcpip.Address
- switch netProtoNum {
- case ipv4.ProtocolNumber:
- dstAddr = testDstAddrV4
- case ipv6.ProtocolNumber:
- dstAddr = testDstAddrV6
- default:
- t.Fatalf("unexpected protocol number: %d", netProtoNum)
- }
- if err := ep.Bind(tcpip.FullAddress{Addr: dstAddr, Port: testDstPort}); err != nil {
- t.Fatalf("ep.Bind(...) on endpoint %d failed: %s", i, err)
- }
- }
-
- npackets := 100000
- nports := 10000
- if got, want := len(test.endpoints), len(wantDistribution); got != want {
- t.Fatalf("got len(test.endpoints) = %d, want %d", got, want)
- }
- ports := make(map[uint16]tcpip.Endpoint)
- stats := make(map[tcpip.Endpoint]int)
- for i := 0; i < npackets; i++ {
- // Send a packet.
- port := uint16(i % nports)
- payload := newPayload()
- hdrs := &headers{
- srcPort: testSrcPort + port,
- dstPort: testDstPort,
- }
- switch netProtoNum {
- case ipv4.ProtocolNumber:
- c.sendV4Packet(payload, hdrs, device)
- case ipv6.ProtocolNumber:
- c.sendV6Packet(payload, hdrs, device)
- default:
- t.Fatalf("unexpected protocol number: %d", netProtoNum)
- }
-
- ep := <-pollChannel
- if _, _, err := ep.Read(nil); err != nil {
- t.Fatalf("Read on endpoint %d failed: %s", eps[ep], err)
- }
- stats[ep]++
- if i < nports {
- ports[uint16(i)] = ep
- } else {
- // Check that all packets from one client are handled by the same
- // socket.
- if want, got := ports[port], ep; want != got {
- t.Fatalf("Packet sent on port %d expected on endpoint %d but received on endpoint %d", port, eps[want], eps[got])
- }
- }
- }
-
- // Check that a packet distribution is as expected.
- for ep, i := range eps {
- wantRatio := wantDistribution[i]
- wantRecv := wantRatio * float64(npackets)
- actualRecv := stats[ep]
- actualRatio := float64(stats[ep]) / float64(npackets)
- // The deviation is less than 10%.
- if math.Abs(actualRatio-wantRatio) > 0.05 {
- t.Errorf("want about %.0f%% (%.0f of %d) packets to arrive on endpoint %d, got %.0f%% (%d of %d)", wantRatio*100, wantRecv, npackets, i, actualRatio*100, actualRecv, npackets)
- }
- }
- })
- }
- }
- }
-}
diff --git a/pkg/tcpip/stack/transport_test.go b/pkg/tcpip/stack/transport_test.go
deleted file mode 100644
index ef3457e32..000000000
--- a/pkg/tcpip/stack/transport_test.go
+++ /dev/null
@@ -1,629 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package stack_test
-
-import (
- "testing"
-
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
- "gvisor.dev/gvisor/pkg/tcpip/link/channel"
- "gvisor.dev/gvisor/pkg/tcpip/link/loopback"
- "gvisor.dev/gvisor/pkg/tcpip/ports"
- "gvisor.dev/gvisor/pkg/tcpip/stack"
- "gvisor.dev/gvisor/pkg/waiter"
-)
-
-const (
- fakeTransNumber tcpip.TransportProtocolNumber = 1
- fakeTransHeaderLen = 3
-)
-
-// fakeTransportEndpoint is a transport-layer protocol endpoint. It counts
-// received packets; the counts of all endpoints are aggregated in the protocol
-// descriptor.
-//
-// Headers of this protocol are fakeTransHeaderLen bytes, but we currently don't
-// use it.
-type fakeTransportEndpoint struct {
- stack.TransportEndpointInfo
- stack *stack.Stack
- proto *fakeTransportProtocol
- peerAddr tcpip.Address
- route stack.Route
- uniqueID uint64
-
- // acceptQueue is non-nil iff bound.
- acceptQueue []fakeTransportEndpoint
-}
-
-func (f *fakeTransportEndpoint) Info() tcpip.EndpointInfo {
- return &f.TransportEndpointInfo
-}
-
-func (*fakeTransportEndpoint) Stats() tcpip.EndpointStats {
- return nil
-}
-
-func (*fakeTransportEndpoint) SetOwner(owner tcpip.PacketOwner) {}
-
-func newFakeTransportEndpoint(s *stack.Stack, proto *fakeTransportProtocol, netProto tcpip.NetworkProtocolNumber, uniqueID uint64) tcpip.Endpoint {
- return &fakeTransportEndpoint{stack: s, TransportEndpointInfo: stack.TransportEndpointInfo{NetProto: netProto}, proto: proto, uniqueID: uniqueID}
-}
-
-func (f *fakeTransportEndpoint) Abort() {
- f.Close()
-}
-
-func (f *fakeTransportEndpoint) Close() {
- f.route.Release()
-}
-
-func (*fakeTransportEndpoint) Readiness(mask waiter.EventMask) waiter.EventMask {
- return mask
-}
-
-func (*fakeTransportEndpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages, *tcpip.Error) {
- return buffer.View{}, tcpip.ControlMessages{}, nil
-}
-
-func (f *fakeTransportEndpoint) Write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, <-chan struct{}, *tcpip.Error) {
- if len(f.route.RemoteAddress) == 0 {
- return 0, nil, tcpip.ErrNoRoute
- }
-
- v, err := p.FullPayload()
- if err != nil {
- return 0, nil, err
- }
- pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
- ReserveHeaderBytes: int(f.route.MaxHeaderLength()) + fakeTransHeaderLen,
- Data: buffer.View(v).ToVectorisedView(),
- })
- _ = pkt.TransportHeader().Push(fakeTransHeaderLen)
- if err := f.route.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: fakeTransNumber, TTL: 123, TOS: stack.DefaultTOS}, pkt); err != nil {
- return 0, nil, err
- }
-
- return int64(len(v)), nil, nil
-}
-
-func (*fakeTransportEndpoint) Peek([][]byte) (int64, tcpip.ControlMessages, *tcpip.Error) {
- return 0, tcpip.ControlMessages{}, nil
-}
-
-// SetSockOpt sets a socket option. Currently not supported.
-func (*fakeTransportEndpoint) SetSockOpt(tcpip.SettableSocketOption) *tcpip.Error {
- return tcpip.ErrInvalidEndpointState
-}
-
-// SetSockOptBool sets a socket option. Currently not supported.
-func (*fakeTransportEndpoint) SetSockOptBool(tcpip.SockOptBool, bool) *tcpip.Error {
- return tcpip.ErrInvalidEndpointState
-}
-
-// SetSockOptInt sets a socket option. Currently not supported.
-func (*fakeTransportEndpoint) SetSockOptInt(tcpip.SockOptInt, int) *tcpip.Error {
- return tcpip.ErrInvalidEndpointState
-}
-
-// GetSockOptBool implements tcpip.Endpoint.GetSockOptBool.
-func (*fakeTransportEndpoint) GetSockOptBool(opt tcpip.SockOptBool) (bool, *tcpip.Error) {
- return false, tcpip.ErrUnknownProtocolOption
-}
-
-// GetSockOptInt implements tcpip.Endpoint.GetSockOptInt.
-func (*fakeTransportEndpoint) GetSockOptInt(opt tcpip.SockOptInt) (int, *tcpip.Error) {
- return -1, tcpip.ErrUnknownProtocolOption
-}
-
-// GetSockOpt implements tcpip.Endpoint.GetSockOpt.
-func (*fakeTransportEndpoint) GetSockOpt(tcpip.GettableSocketOption) *tcpip.Error {
- return tcpip.ErrInvalidEndpointState
-}
-
-// Disconnect implements tcpip.Endpoint.Disconnect.
-func (*fakeTransportEndpoint) Disconnect() *tcpip.Error {
- return tcpip.ErrNotSupported
-}
-
-func (f *fakeTransportEndpoint) Connect(addr tcpip.FullAddress) *tcpip.Error {
- f.peerAddr = addr.Addr
-
- // Find the route.
- r, err := f.stack.FindRoute(addr.NIC, "", addr.Addr, fakeNetNumber, false /* multicastLoop */)
- if err != nil {
- return tcpip.ErrNoRoute
- }
- defer r.Release()
-
- // Try to register so that we can start receiving packets.
- f.ID.RemoteAddress = addr.Addr
- err = f.stack.RegisterTransportEndpoint(0, []tcpip.NetworkProtocolNumber{fakeNetNumber}, fakeTransNumber, f.ID, f, ports.Flags{}, 0 /* bindToDevice */)
- if err != nil {
- return err
- }
-
- f.route = r.Clone()
-
- return nil
-}
-
-func (f *fakeTransportEndpoint) UniqueID() uint64 {
- return f.uniqueID
-}
-
-func (*fakeTransportEndpoint) ConnectEndpoint(e tcpip.Endpoint) *tcpip.Error {
- return nil
-}
-
-func (*fakeTransportEndpoint) Shutdown(tcpip.ShutdownFlags) *tcpip.Error {
- return nil
-}
-
-func (*fakeTransportEndpoint) Reset() {
-}
-
-func (*fakeTransportEndpoint) Listen(int) *tcpip.Error {
- return nil
-}
-
-func (f *fakeTransportEndpoint) Accept(*tcpip.FullAddress) (tcpip.Endpoint, *waiter.Queue, *tcpip.Error) {
- if len(f.acceptQueue) == 0 {
- return nil, nil, nil
- }
- a := f.acceptQueue[0]
- f.acceptQueue = f.acceptQueue[1:]
- return &a, nil, nil
-}
-
-func (f *fakeTransportEndpoint) Bind(a tcpip.FullAddress) *tcpip.Error {
- if err := f.stack.RegisterTransportEndpoint(
- a.NIC,
- []tcpip.NetworkProtocolNumber{fakeNetNumber},
- fakeTransNumber,
- stack.TransportEndpointID{LocalAddress: a.Addr},
- f,
- ports.Flags{},
- 0, /* bindtoDevice */
- ); err != nil {
- return err
- }
- f.acceptQueue = []fakeTransportEndpoint{}
- return nil
-}
-
-func (*fakeTransportEndpoint) GetLocalAddress() (tcpip.FullAddress, *tcpip.Error) {
- return tcpip.FullAddress{}, nil
-}
-
-func (*fakeTransportEndpoint) GetRemoteAddress() (tcpip.FullAddress, *tcpip.Error) {
- return tcpip.FullAddress{}, nil
-}
-
-func (f *fakeTransportEndpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, _ *stack.PacketBuffer) {
- // Increment the number of received packets.
- f.proto.packetCount++
- if f.acceptQueue != nil {
- f.acceptQueue = append(f.acceptQueue, fakeTransportEndpoint{
- stack: f.stack,
- TransportEndpointInfo: stack.TransportEndpointInfo{
- ID: f.ID,
- NetProto: f.NetProto,
- },
- proto: f.proto,
- peerAddr: r.RemoteAddress,
- route: r.Clone(),
- })
- }
-}
-
-func (f *fakeTransportEndpoint) HandleControlPacket(stack.TransportEndpointID, stack.ControlType, uint32, *stack.PacketBuffer) {
- // Increment the number of received control packets.
- f.proto.controlCount++
-}
-
-func (*fakeTransportEndpoint) State() uint32 {
- return 0
-}
-
-func (*fakeTransportEndpoint) ModerateRecvBuf(copied int) {}
-
-func (*fakeTransportEndpoint) Resume(*stack.Stack) {}
-
-func (*fakeTransportEndpoint) Wait() {}
-
-func (*fakeTransportEndpoint) LastError() *tcpip.Error {
- return nil
-}
-
-type fakeTransportGoodOption bool
-
-type fakeTransportBadOption bool
-
-type fakeTransportInvalidValueOption int
-
-type fakeTransportProtocolOptions struct {
- good bool
-}
-
-// fakeTransportProtocol is a transport-layer protocol descriptor. It
-// aggregates the number of packets received via endpoints of this protocol.
-type fakeTransportProtocol struct {
- packetCount int
- controlCount int
- opts fakeTransportProtocolOptions
-}
-
-func (*fakeTransportProtocol) Number() tcpip.TransportProtocolNumber {
- return fakeTransNumber
-}
-
-func (f *fakeTransportProtocol) NewEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolNumber, _ *waiter.Queue) (tcpip.Endpoint, *tcpip.Error) {
- return newFakeTransportEndpoint(stack, f, netProto, stack.UniqueID()), nil
-}
-
-func (*fakeTransportProtocol) NewRawEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolNumber, _ *waiter.Queue) (tcpip.Endpoint, *tcpip.Error) {
- return nil, tcpip.ErrUnknownProtocol
-}
-
-func (*fakeTransportProtocol) MinimumPacketSize() int {
- return fakeTransHeaderLen
-}
-
-func (*fakeTransportProtocol) ParsePorts(buffer.View) (src, dst uint16, err *tcpip.Error) {
- return 0, 0, nil
-}
-
-func (*fakeTransportProtocol) HandleUnknownDestinationPacket(*stack.Route, stack.TransportEndpointID, *stack.PacketBuffer) bool {
- return true
-}
-
-func (f *fakeTransportProtocol) SetOption(option tcpip.SettableTransportProtocolOption) *tcpip.Error {
- switch v := option.(type) {
- case *tcpip.TCPModerateReceiveBufferOption:
- f.opts.good = bool(*v)
- return nil
- default:
- return tcpip.ErrUnknownProtocolOption
- }
-}
-
-func (f *fakeTransportProtocol) Option(option tcpip.GettableTransportProtocolOption) *tcpip.Error {
- switch v := option.(type) {
- case *tcpip.TCPModerateReceiveBufferOption:
- *v = tcpip.TCPModerateReceiveBufferOption(f.opts.good)
- return nil
- default:
- return tcpip.ErrUnknownProtocolOption
- }
-}
-
-// Abort implements TransportProtocol.Abort.
-func (*fakeTransportProtocol) Abort() {}
-
-// Close implements tcpip.Endpoint.Close.
-func (*fakeTransportProtocol) Close() {}
-
-// Wait implements TransportProtocol.Wait.
-func (*fakeTransportProtocol) Wait() {}
-
-// Parse implements TransportProtocol.Parse.
-func (*fakeTransportProtocol) Parse(pkt *stack.PacketBuffer) bool {
- _, ok := pkt.TransportHeader().Consume(fakeTransHeaderLen)
- return ok
-}
-
-func fakeTransFactory() stack.TransportProtocol {
- return &fakeTransportProtocol{}
-}
-
-func TestTransportReceive(t *testing.T) {
- linkEP := channel.New(10, defaultMTU, "")
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- TransportProtocols: []stack.TransportProtocol{fakeTransFactory()},
- })
- if err := s.CreateNIC(1, linkEP); err != nil {
- t.Fatalf("CreateNIC failed: %v", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatalf("AddAddress failed: %v", err)
- }
-
- // Create endpoint and connect to remote address.
- wq := waiter.Queue{}
- ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- if err := ep.Connect(tcpip.FullAddress{0, "\x02", 0}); err != nil {
- t.Fatalf("Connect failed: %v", err)
- }
-
- fakeTrans := s.TransportProtocolInstance(fakeTransNumber).(*fakeTransportProtocol)
-
- // Create buffer that will hold the packet.
- buf := buffer.NewView(30)
-
- // Make sure packet with wrong protocol is not delivered.
- buf[0] = 1
- buf[2] = 0
- linkEP.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeTrans.packetCount != 0 {
- t.Errorf("packetCount = %d, want %d", fakeTrans.packetCount, 0)
- }
-
- // Make sure packet from the wrong source is not delivered.
- buf[0] = 1
- buf[1] = 3
- buf[2] = byte(fakeTransNumber)
- linkEP.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeTrans.packetCount != 0 {
- t.Errorf("packetCount = %d, want %d", fakeTrans.packetCount, 0)
- }
-
- // Make sure packet is delivered.
- buf[0] = 1
- buf[1] = 2
- buf[2] = byte(fakeTransNumber)
- linkEP.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeTrans.packetCount != 1 {
- t.Errorf("packetCount = %d, want %d", fakeTrans.packetCount, 1)
- }
-}
-
-func TestTransportControlReceive(t *testing.T) {
- linkEP := channel.New(10, defaultMTU, "")
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- TransportProtocols: []stack.TransportProtocol{fakeTransFactory()},
- })
- if err := s.CreateNIC(1, linkEP); err != nil {
- t.Fatalf("CreateNIC failed: %v", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatalf("AddAddress failed: %v", err)
- }
-
- // Create endpoint and connect to remote address.
- wq := waiter.Queue{}
- ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- if err := ep.Connect(tcpip.FullAddress{0, "\x02", 0}); err != nil {
- t.Fatalf("Connect failed: %v", err)
- }
-
- fakeTrans := s.TransportProtocolInstance(fakeTransNumber).(*fakeTransportProtocol)
-
- // Create buffer that will hold the control packet.
- buf := buffer.NewView(2*fakeNetHeaderLen + 30)
-
- // Outer packet contains the control protocol number.
- buf[0] = 1
- buf[1] = 0xfe
- buf[2] = uint8(fakeControlProtocol)
-
- // Make sure packet with wrong protocol is not delivered.
- buf[fakeNetHeaderLen+0] = 0
- buf[fakeNetHeaderLen+1] = 1
- buf[fakeNetHeaderLen+2] = 0
- linkEP.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeTrans.controlCount != 0 {
- t.Errorf("controlCount = %d, want %d", fakeTrans.controlCount, 0)
- }
-
- // Make sure packet from the wrong source is not delivered.
- buf[fakeNetHeaderLen+0] = 3
- buf[fakeNetHeaderLen+1] = 1
- buf[fakeNetHeaderLen+2] = byte(fakeTransNumber)
- linkEP.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeTrans.controlCount != 0 {
- t.Errorf("controlCount = %d, want %d", fakeTrans.controlCount, 0)
- }
-
- // Make sure packet is delivered.
- buf[fakeNetHeaderLen+0] = 2
- buf[fakeNetHeaderLen+1] = 1
- buf[fakeNetHeaderLen+2] = byte(fakeTransNumber)
- linkEP.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buf.ToVectorisedView(),
- }))
- if fakeTrans.controlCount != 1 {
- t.Errorf("controlCount = %d, want %d", fakeTrans.controlCount, 1)
- }
-}
-
-func TestTransportSend(t *testing.T) {
- linkEP := channel.New(10, defaultMTU, "")
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- TransportProtocols: []stack.TransportProtocol{fakeTransFactory()},
- })
- if err := s.CreateNIC(1, linkEP); err != nil {
- t.Fatalf("CreateNIC failed: %v", err)
- }
-
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatalf("AddAddress failed: %v", err)
- }
-
- {
- subnet, err := tcpip.NewSubnet("\x00", "\x00")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}})
- }
-
- // Create endpoint and bind it.
- wq := waiter.Queue{}
- ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- if err := ep.Connect(tcpip.FullAddress{0, "\x02", 0}); err != nil {
- t.Fatalf("Connect failed: %v", err)
- }
-
- // Create buffer that will hold the payload.
- view := buffer.NewView(30)
- _, _, err = ep.Write(tcpip.SlicePayload(view), tcpip.WriteOptions{})
- if err != nil {
- t.Fatalf("write failed: %v", err)
- }
-
- fakeNet := s.NetworkProtocolInstance(fakeNetNumber).(*fakeNetworkProtocol)
-
- if fakeNet.sendPacketCount[2] != 1 {
- t.Errorf("sendPacketCount = %d, want %d", fakeNet.sendPacketCount[2], 1)
- }
-}
-
-func TestTransportOptions(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- TransportProtocols: []stack.TransportProtocol{fakeTransFactory()},
- })
-
- v := tcpip.TCPModerateReceiveBufferOption(true)
- if err := s.SetTransportProtocolOption(fakeTransNumber, &v); err != nil {
- t.Errorf("s.SetTransportProtocolOption(fakeTrans, &%T(%t)): %s", v, v, err)
- }
- v = false
- if err := s.TransportProtocolOption(fakeTransNumber, &v); err != nil {
- t.Fatalf("s.TransportProtocolOption(fakeTransNumber, &%T): %s", v, err)
- }
- if !v {
- t.Fatalf("got tcpip.TCPModerateReceiveBufferOption = false, want = true")
- }
-}
-
-func TestTransportForwarding(t *testing.T) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
- TransportProtocols: []stack.TransportProtocol{fakeTransFactory()},
- })
- s.SetForwarding(true)
-
- // TODO(b/123449044): Change this to a channel NIC.
- ep1 := loopback.New()
- if err := s.CreateNIC(1, ep1); err != nil {
- t.Fatalf("CreateNIC #1 failed: %v", err)
- }
- if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil {
- t.Fatalf("AddAddress #1 failed: %v", err)
- }
-
- ep2 := channel.New(10, defaultMTU, "")
- if err := s.CreateNIC(2, ep2); err != nil {
- t.Fatalf("CreateNIC #2 failed: %v", err)
- }
- if err := s.AddAddress(2, fakeNetNumber, "\x02"); err != nil {
- t.Fatalf("AddAddress #2 failed: %v", err)
- }
-
- // Route all packets to address 3 to NIC 2 and all packets to address
- // 1 to NIC 1.
- {
- subnet0, err := tcpip.NewSubnet("\x03", "\xff")
- if err != nil {
- t.Fatal(err)
- }
- subnet1, err := tcpip.NewSubnet("\x01", "\xff")
- if err != nil {
- t.Fatal(err)
- }
- s.SetRouteTable([]tcpip.Route{
- {Destination: subnet0, Gateway: "\x00", NIC: 2},
- {Destination: subnet1, Gateway: "\x00", NIC: 1},
- })
- }
-
- wq := waiter.Queue{}
- ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- if err := ep.Bind(tcpip.FullAddress{Addr: "\x01", NIC: 1}); err != nil {
- t.Fatalf("Bind failed: %v", err)
- }
-
- // Send a packet to address 1 from address 3.
- req := buffer.NewView(30)
- req[0] = 1
- req[1] = 3
- req[2] = byte(fakeTransNumber)
- ep2.InjectInbound(fakeNetNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: req.ToVectorisedView(),
- }))
-
- aep, _, err := ep.Accept(nil)
- if err != nil || aep == nil {
- t.Fatalf("Accept failed: %v, %v", aep, err)
- }
-
- resp := buffer.NewView(30)
- if _, _, err := aep.Write(tcpip.SlicePayload(resp), tcpip.WriteOptions{}); err != nil {
- t.Fatalf("Write failed: %v", err)
- }
-
- p, ok := ep2.Read()
- if !ok {
- t.Fatal("Response packet not forwarded")
- }
-
- nh := stack.PayloadSince(p.Pkt.NetworkHeader())
- if dst := nh[0]; dst != 3 {
- t.Errorf("Response packet has incorrect destination addresss: got = %d, want = 3", dst)
- }
- if src := nh[1]; src != 1 {
- t.Errorf("Response packet has incorrect source addresss: got = %d, want = 3", src)
- }
-}
diff --git a/pkg/tcpip/stack/tuple_list.go b/pkg/tcpip/stack/tuple_list.go
new file mode 100644
index 000000000..0d1b98874
--- /dev/null
+++ b/pkg/tcpip/stack/tuple_list.go
@@ -0,0 +1,193 @@
+package stack
+
+// ElementMapper provides an identity mapping by default.
+//
+// This can be replaced to provide a struct that maps elements to linker
+// objects, if they are not the same. An ElementMapper is not typically
+// required if: Linker is left as is, Element is left as is, or Linker and
+// Element are the same type.
+type tupleElementMapper struct{}
+
+// linkerFor maps an Element to a Linker.
+//
+// This default implementation should be inlined.
+//
+//go:nosplit
+func (tupleElementMapper) linkerFor(elem *tuple) *tuple { return elem }
+
+// List is an intrusive list. Entries can be added to or removed from the list
+// in O(1) time and with no additional memory allocations.
+//
+// The zero value for List is an empty list ready to use.
+//
+// To iterate over a list (where l is a List):
+// for e := l.Front(); e != nil; e = e.Next() {
+// // do something with e.
+// }
+//
+// +stateify savable
+type tupleList struct {
+ head *tuple
+ tail *tuple
+}
+
+// Reset resets list l to the empty state.
+func (l *tupleList) Reset() {
+ l.head = nil
+ l.tail = nil
+}
+
+// Empty returns true iff the list is empty.
+func (l *tupleList) Empty() bool {
+ return l.head == nil
+}
+
+// Front returns the first element of list l or nil.
+func (l *tupleList) Front() *tuple {
+ return l.head
+}
+
+// Back returns the last element of list l or nil.
+func (l *tupleList) Back() *tuple {
+ return l.tail
+}
+
+// Len returns the number of elements in the list.
+//
+// NOTE: This is an O(n) operation.
+func (l *tupleList) Len() (count int) {
+ for e := l.Front(); e != nil; e = (tupleElementMapper{}.linkerFor(e)).Next() {
+ count++
+ }
+ return count
+}
+
+// PushFront inserts the element e at the front of list l.
+func (l *tupleList) PushFront(e *tuple) {
+ linker := tupleElementMapper{}.linkerFor(e)
+ linker.SetNext(l.head)
+ linker.SetPrev(nil)
+ if l.head != nil {
+ tupleElementMapper{}.linkerFor(l.head).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+
+ l.head = e
+}
+
+// PushBack inserts the element e at the back of list l.
+func (l *tupleList) PushBack(e *tuple) {
+ linker := tupleElementMapper{}.linkerFor(e)
+ linker.SetNext(nil)
+ linker.SetPrev(l.tail)
+ if l.tail != nil {
+ tupleElementMapper{}.linkerFor(l.tail).SetNext(e)
+ } else {
+ l.head = e
+ }
+
+ l.tail = e
+}
+
+// PushBackList inserts list m at the end of list l, emptying m.
+func (l *tupleList) PushBackList(m *tupleList) {
+ if l.head == nil {
+ l.head = m.head
+ l.tail = m.tail
+ } else if m.head != nil {
+ tupleElementMapper{}.linkerFor(l.tail).SetNext(m.head)
+ tupleElementMapper{}.linkerFor(m.head).SetPrev(l.tail)
+
+ l.tail = m.tail
+ }
+ m.head = nil
+ m.tail = nil
+}
+
+// InsertAfter inserts e after b.
+func (l *tupleList) InsertAfter(b, e *tuple) {
+ bLinker := tupleElementMapper{}.linkerFor(b)
+ eLinker := tupleElementMapper{}.linkerFor(e)
+
+ a := bLinker.Next()
+
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ bLinker.SetNext(e)
+
+ if a != nil {
+ tupleElementMapper{}.linkerFor(a).SetPrev(e)
+ } else {
+ l.tail = e
+ }
+}
+
+// InsertBefore inserts e before a.
+func (l *tupleList) InsertBefore(a, e *tuple) {
+ aLinker := tupleElementMapper{}.linkerFor(a)
+ eLinker := tupleElementMapper{}.linkerFor(e)
+
+ b := aLinker.Prev()
+ eLinker.SetNext(a)
+ eLinker.SetPrev(b)
+ aLinker.SetPrev(e)
+
+ if b != nil {
+ tupleElementMapper{}.linkerFor(b).SetNext(e)
+ } else {
+ l.head = e
+ }
+}
+
+// Remove removes e from l.
+func (l *tupleList) Remove(e *tuple) {
+ linker := tupleElementMapper{}.linkerFor(e)
+ prev := linker.Prev()
+ next := linker.Next()
+
+ if prev != nil {
+ tupleElementMapper{}.linkerFor(prev).SetNext(next)
+ } else if l.head == e {
+ l.head = next
+ }
+
+ if next != nil {
+ tupleElementMapper{}.linkerFor(next).SetPrev(prev)
+ } else if l.tail == e {
+ l.tail = prev
+ }
+
+ linker.SetNext(nil)
+ linker.SetPrev(nil)
+}
+
+// Entry is a default implementation of Linker. Users can add anonymous fields
+// of this type to their structs to make them automatically implement the
+// methods needed by List.
+//
+// +stateify savable
+type tupleEntry struct {
+ next *tuple
+ prev *tuple
+}
+
+// Next returns the entry that follows e in the list.
+func (e *tupleEntry) Next() *tuple {
+ return e.next
+}
+
+// Prev returns the entry that precedes e in the list.
+func (e *tupleEntry) Prev() *tuple {
+ return e.prev
+}
+
+// SetNext assigns 'entry' as the entry that follows e in the list.
+func (e *tupleEntry) SetNext(elem *tuple) {
+ e.next = elem
+}
+
+// SetPrev assigns 'entry' as the entry that precedes e in the list.
+func (e *tupleEntry) SetPrev(elem *tuple) {
+ e.prev = elem
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 07:40:27 +0000