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Diffstat (limited to 'pkg/tcpip/network/ip_test.go')
-rw-r--r--pkg/tcpip/network/ip_test.go648
1 files changed, 0 insertions, 648 deletions
diff --git a/pkg/tcpip/network/ip_test.go b/pkg/tcpip/network/ip_test.go
deleted file mode 100644
index 1de188738..000000000
--- a/pkg/tcpip/network/ip_test.go
+++ /dev/null
@@ -1,648 +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 ip_test
-
-import (
- "testing"
-
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/buffer"
- "gvisor.dev/gvisor/pkg/tcpip/header"
- "gvisor.dev/gvisor/pkg/tcpip/link/loopback"
- "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/tcp"
- "gvisor.dev/gvisor/pkg/tcpip/transport/udp"
-)
-
-const (
- localIpv4Addr = "\x0a\x00\x00\x01"
- localIpv4PrefixLen = 24
- remoteIpv4Addr = "\x0a\x00\x00\x02"
- ipv4SubnetAddr = "\x0a\x00\x00\x00"
- ipv4SubnetMask = "\xff\xff\xff\x00"
- ipv4Gateway = "\x0a\x00\x00\x03"
- localIpv6Addr = "\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01"
- localIpv6PrefixLen = 120
- remoteIpv6Addr = "\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02"
- ipv6SubnetAddr = "\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
- ipv6SubnetMask = "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00"
- ipv6Gateway = "\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03"
-)
-
-// testObject implements two interfaces: LinkEndpoint and TransportDispatcher.
-// The former is used to pretend that it's a link endpoint so that we can
-// inspect packets written by the network endpoints. The latter is used to
-// pretend that it's the network stack so that it can inspect incoming packets
-// that have been handled by the network endpoints.
-//
-// Packets are checked by comparing their fields/values against the expected
-// values stored in the test object itself.
-type testObject struct {
- t *testing.T
- protocol tcpip.TransportProtocolNumber
- contents []byte
- srcAddr tcpip.Address
- dstAddr tcpip.Address
- v4 bool
- typ stack.ControlType
- extra uint32
-
- dataCalls int
- controlCalls int
-}
-
-// checkValues verifies that the transport protocol, data contents, src & dst
-// addresses of a packet match what's expected. If any field doesn't match, the
-// test fails.
-func (t *testObject) checkValues(protocol tcpip.TransportProtocolNumber, vv buffer.VectorisedView, srcAddr, dstAddr tcpip.Address) {
- v := vv.ToView()
- if protocol != t.protocol {
- t.t.Errorf("protocol = %v, want %v", protocol, t.protocol)
- }
-
- if srcAddr != t.srcAddr {
- t.t.Errorf("srcAddr = %v, want %v", srcAddr, t.srcAddr)
- }
-
- if dstAddr != t.dstAddr {
- t.t.Errorf("dstAddr = %v, want %v", dstAddr, t.dstAddr)
- }
-
- if len(v) != len(t.contents) {
- t.t.Fatalf("len(payload) = %v, want %v", len(v), len(t.contents))
- }
-
- for i := range t.contents {
- if t.contents[i] != v[i] {
- t.t.Fatalf("payload[%v] = %v, want %v", i, v[i], t.contents[i])
- }
- }
-}
-
-// DeliverTransportPacket is called by network endpoints after parsing incoming
-// packets. This is used by the test object to verify that the results of the
-// parsing are expected.
-func (t *testObject) DeliverTransportPacket(r *stack.Route, protocol tcpip.TransportProtocolNumber, pkt tcpip.PacketBuffer) {
- t.checkValues(protocol, pkt.Data, r.RemoteAddress, r.LocalAddress)
- t.dataCalls++
-}
-
-// DeliverTransportControlPacket is called by network endpoints after parsing
-// incoming control (ICMP) packets. This is used by the test object to verify
-// that the results of the parsing are expected.
-func (t *testObject) DeliverTransportControlPacket(local, remote tcpip.Address, net tcpip.NetworkProtocolNumber, trans tcpip.TransportProtocolNumber, typ stack.ControlType, extra uint32, pkt tcpip.PacketBuffer) {
- t.checkValues(trans, pkt.Data, remote, local)
- if typ != t.typ {
- t.t.Errorf("typ = %v, want %v", typ, t.typ)
- }
- if extra != t.extra {
- t.t.Errorf("extra = %v, want %v", extra, t.extra)
- }
- t.controlCalls++
-}
-
-// Attach is only implemented to satisfy the LinkEndpoint interface.
-func (*testObject) Attach(stack.NetworkDispatcher) {}
-
-// IsAttached implements stack.LinkEndpoint.IsAttached.
-func (*testObject) IsAttached() bool {
- return true
-}
-
-// MTU implements stack.LinkEndpoint.MTU. It just returns a constant that
-// matches the linux loopback MTU.
-func (*testObject) MTU() uint32 {
- return 65536
-}
-
-// Capabilities implements stack.LinkEndpoint.Capabilities.
-func (*testObject) Capabilities() stack.LinkEndpointCapabilities {
- return 0
-}
-
-// MaxHeaderLength is only implemented to satisfy the LinkEndpoint interface.
-func (*testObject) MaxHeaderLength() uint16 {
- return 0
-}
-
-// LinkAddress returns the link address of this endpoint.
-func (*testObject) LinkAddress() tcpip.LinkAddress {
- return ""
-}
-
-// Wait implements stack.LinkEndpoint.Wait.
-func (*testObject) Wait() {}
-
-// WritePacket is called by network endpoints after producing a packet and
-// writing it to the link endpoint. This is used by the test object to verify
-// that the produced packet is as expected.
-func (t *testObject) WritePacket(_ *stack.Route, _ *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt tcpip.PacketBuffer) *tcpip.Error {
- var prot tcpip.TransportProtocolNumber
- var srcAddr tcpip.Address
- var dstAddr tcpip.Address
-
- if t.v4 {
- h := header.IPv4(pkt.Header.View())
- prot = tcpip.TransportProtocolNumber(h.Protocol())
- srcAddr = h.SourceAddress()
- dstAddr = h.DestinationAddress()
-
- } else {
- h := header.IPv6(pkt.Header.View())
- prot = tcpip.TransportProtocolNumber(h.NextHeader())
- srcAddr = h.SourceAddress()
- dstAddr = h.DestinationAddress()
- }
- t.checkValues(prot, pkt.Data, srcAddr, dstAddr)
- return nil
-}
-
-// WritePackets implements stack.LinkEndpoint.WritePackets.
-func (t *testObject) WritePackets(_ *stack.Route, _ *stack.GSO, hdr []stack.PacketDescriptor, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) (int, *tcpip.Error) {
- panic("not implemented")
-}
-
-func (t *testObject) WriteRawPacket(_ buffer.VectorisedView) *tcpip.Error {
- return tcpip.ErrNotSupported
-}
-
-func buildIPv4Route(local, remote tcpip.Address) (stack.Route, *tcpip.Error) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv4.NewProtocol()},
- TransportProtocols: []stack.TransportProtocol{udp.NewProtocol(), tcp.NewProtocol()},
- })
- s.CreateNIC(1, loopback.New())
- s.AddAddress(1, ipv4.ProtocolNumber, local)
- s.SetRouteTable([]tcpip.Route{{
- Destination: header.IPv4EmptySubnet,
- Gateway: ipv4Gateway,
- NIC: 1,
- }})
-
- return s.FindRoute(1, local, remote, ipv4.ProtocolNumber, false /* multicastLoop */)
-}
-
-func buildIPv6Route(local, remote tcpip.Address) (stack.Route, *tcpip.Error) {
- s := stack.New(stack.Options{
- NetworkProtocols: []stack.NetworkProtocol{ipv6.NewProtocol()},
- TransportProtocols: []stack.TransportProtocol{udp.NewProtocol(), tcp.NewProtocol()},
- })
- s.CreateNIC(1, loopback.New())
- s.AddAddress(1, ipv6.ProtocolNumber, local)
- s.SetRouteTable([]tcpip.Route{{
- Destination: header.IPv6EmptySubnet,
- Gateway: ipv6Gateway,
- NIC: 1,
- }})
-
- return s.FindRoute(1, local, remote, ipv6.ProtocolNumber, false /* multicastLoop */)
-}
-
-func TestIPv4Send(t *testing.T) {
- o := testObject{t: t, v4: true}
- proto := ipv4.NewProtocol()
- ep, err := proto.NewEndpoint(1, tcpip.AddressWithPrefix{localIpv4Addr, localIpv4PrefixLen}, nil, nil, &o)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- // Allocate and initialize the payload view.
- payload := buffer.NewView(100)
- for i := 0; i < len(payload); i++ {
- payload[i] = uint8(i)
- }
-
- // Allocate the header buffer.
- hdr := buffer.NewPrependable(int(ep.MaxHeaderLength()))
-
- // Issue the write.
- o.protocol = 123
- o.srcAddr = localIpv4Addr
- o.dstAddr = remoteIpv4Addr
- o.contents = payload
-
- r, err := buildIPv4Route(localIpv4Addr, remoteIpv4Addr)
- if err != nil {
- t.Fatalf("could not find route: %v", err)
- }
- if err := ep.WritePacket(&r, nil /* gso */, stack.NetworkHeaderParams{Protocol: 123, TTL: 123, TOS: stack.DefaultTOS}, stack.PacketOut, tcpip.PacketBuffer{
- Header: hdr,
- Data: payload.ToVectorisedView(),
- }); err != nil {
- t.Fatalf("WritePacket failed: %v", err)
- }
-}
-
-func TestIPv4Receive(t *testing.T) {
- o := testObject{t: t, v4: true}
- proto := ipv4.NewProtocol()
- ep, err := proto.NewEndpoint(1, tcpip.AddressWithPrefix{localIpv4Addr, localIpv4PrefixLen}, nil, &o, nil)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- totalLen := header.IPv4MinimumSize + 30
- view := buffer.NewView(totalLen)
- ip := header.IPv4(view)
- ip.Encode(&header.IPv4Fields{
- IHL: header.IPv4MinimumSize,
- TotalLength: uint16(totalLen),
- TTL: 20,
- Protocol: 10,
- SrcAddr: remoteIpv4Addr,
- DstAddr: localIpv4Addr,
- })
-
- // Make payload be non-zero.
- for i := header.IPv4MinimumSize; i < totalLen; i++ {
- view[i] = uint8(i)
- }
-
- // Give packet to ipv4 endpoint, dispatcher will validate that it's ok.
- o.protocol = 10
- o.srcAddr = remoteIpv4Addr
- o.dstAddr = localIpv4Addr
- o.contents = view[header.IPv4MinimumSize:totalLen]
-
- r, err := buildIPv4Route(localIpv4Addr, remoteIpv4Addr)
- if err != nil {
- t.Fatalf("could not find route: %v", err)
- }
- ep.HandlePacket(&r, tcpip.PacketBuffer{
- Data: view.ToVectorisedView(),
- })
- if o.dataCalls != 1 {
- t.Fatalf("Bad number of data calls: got %x, want 1", o.dataCalls)
- }
-}
-
-func TestIPv4ReceiveControl(t *testing.T) {
- const mtu = 0xbeef - header.IPv4MinimumSize
- cases := []struct {
- name string
- expectedCount int
- fragmentOffset uint16
- code uint8
- expectedTyp stack.ControlType
- expectedExtra uint32
- trunc int
- }{
- {"FragmentationNeeded", 1, 0, header.ICMPv4FragmentationNeeded, stack.ControlPacketTooBig, mtu, 0},
- {"Truncated (10 bytes missing)", 0, 0, header.ICMPv4FragmentationNeeded, stack.ControlPacketTooBig, mtu, 10},
- {"Truncated (missing IPv4 header)", 0, 0, header.ICMPv4FragmentationNeeded, stack.ControlPacketTooBig, mtu, header.IPv4MinimumSize + 8},
- {"Truncated (missing 'extra info')", 0, 0, header.ICMPv4FragmentationNeeded, stack.ControlPacketTooBig, mtu, 4 + header.IPv4MinimumSize + 8},
- {"Truncated (missing ICMP header)", 0, 0, header.ICMPv4FragmentationNeeded, stack.ControlPacketTooBig, mtu, header.ICMPv4MinimumSize + header.IPv4MinimumSize + 8},
- {"Port unreachable", 1, 0, header.ICMPv4PortUnreachable, stack.ControlPortUnreachable, 0, 0},
- {"Non-zero fragment offset", 0, 100, header.ICMPv4PortUnreachable, stack.ControlPortUnreachable, 0, 0},
- {"Zero-length packet", 0, 0, header.ICMPv4PortUnreachable, stack.ControlPortUnreachable, 0, 2*header.IPv4MinimumSize + header.ICMPv4MinimumSize + 8},
- }
- r, err := buildIPv4Route(localIpv4Addr, "\x0a\x00\x00\xbb")
- if err != nil {
- t.Fatal(err)
- }
- for _, c := range cases {
- t.Run(c.name, func(t *testing.T) {
- o := testObject{t: t}
- proto := ipv4.NewProtocol()
- ep, err := proto.NewEndpoint(1, tcpip.AddressWithPrefix{localIpv4Addr, localIpv4PrefixLen}, nil, &o, nil)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
- defer ep.Close()
-
- const dataOffset = header.IPv4MinimumSize*2 + header.ICMPv4MinimumSize
- view := buffer.NewView(dataOffset + 8)
-
- // Create the outer IPv4 header.
- ip := header.IPv4(view)
- ip.Encode(&header.IPv4Fields{
- IHL: header.IPv4MinimumSize,
- TotalLength: uint16(len(view) - c.trunc),
- TTL: 20,
- Protocol: uint8(header.ICMPv4ProtocolNumber),
- SrcAddr: "\x0a\x00\x00\xbb",
- DstAddr: localIpv4Addr,
- })
-
- // Create the ICMP header.
- icmp := header.ICMPv4(view[header.IPv4MinimumSize:])
- icmp.SetType(header.ICMPv4DstUnreachable)
- icmp.SetCode(c.code)
- icmp.SetIdent(0xdead)
- icmp.SetSequence(0xbeef)
-
- // Create the inner IPv4 header.
- ip = header.IPv4(view[header.IPv4MinimumSize+header.ICMPv4MinimumSize:])
- ip.Encode(&header.IPv4Fields{
- IHL: header.IPv4MinimumSize,
- TotalLength: 100,
- TTL: 20,
- Protocol: 10,
- FragmentOffset: c.fragmentOffset,
- SrcAddr: localIpv4Addr,
- DstAddr: remoteIpv4Addr,
- })
-
- // Make payload be non-zero.
- for i := dataOffset; i < len(view); i++ {
- view[i] = uint8(i)
- }
-
- // Give packet to IPv4 endpoint, dispatcher will validate that
- // it's ok.
- o.protocol = 10
- o.srcAddr = remoteIpv4Addr
- o.dstAddr = localIpv4Addr
- o.contents = view[dataOffset:]
- o.typ = c.expectedTyp
- o.extra = c.expectedExtra
-
- vv := view[:len(view)-c.trunc].ToVectorisedView()
- ep.HandlePacket(&r, tcpip.PacketBuffer{
- Data: vv,
- })
- if want := c.expectedCount; o.controlCalls != want {
- t.Fatalf("Bad number of control calls for %q case: got %v, want %v", c.name, o.controlCalls, want)
- }
- })
- }
-}
-
-func TestIPv4FragmentationReceive(t *testing.T) {
- o := testObject{t: t, v4: true}
- proto := ipv4.NewProtocol()
- ep, err := proto.NewEndpoint(1, tcpip.AddressWithPrefix{localIpv4Addr, localIpv4PrefixLen}, nil, &o, nil)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- totalLen := header.IPv4MinimumSize + 24
-
- frag1 := buffer.NewView(totalLen)
- ip1 := header.IPv4(frag1)
- ip1.Encode(&header.IPv4Fields{
- IHL: header.IPv4MinimumSize,
- TotalLength: uint16(totalLen),
- TTL: 20,
- Protocol: 10,
- FragmentOffset: 0,
- Flags: header.IPv4FlagMoreFragments,
- SrcAddr: remoteIpv4Addr,
- DstAddr: localIpv4Addr,
- })
- // Make payload be non-zero.
- for i := header.IPv4MinimumSize; i < totalLen; i++ {
- frag1[i] = uint8(i)
- }
-
- frag2 := buffer.NewView(totalLen)
- ip2 := header.IPv4(frag2)
- ip2.Encode(&header.IPv4Fields{
- IHL: header.IPv4MinimumSize,
- TotalLength: uint16(totalLen),
- TTL: 20,
- Protocol: 10,
- FragmentOffset: 24,
- SrcAddr: remoteIpv4Addr,
- DstAddr: localIpv4Addr,
- })
- // Make payload be non-zero.
- for i := header.IPv4MinimumSize; i < totalLen; i++ {
- frag2[i] = uint8(i)
- }
-
- // Give packet to ipv4 endpoint, dispatcher will validate that it's ok.
- o.protocol = 10
- o.srcAddr = remoteIpv4Addr
- o.dstAddr = localIpv4Addr
- o.contents = append(frag1[header.IPv4MinimumSize:totalLen], frag2[header.IPv4MinimumSize:totalLen]...)
-
- r, err := buildIPv4Route(localIpv4Addr, remoteIpv4Addr)
- if err != nil {
- t.Fatalf("could not find route: %v", err)
- }
-
- // Send first segment.
- ep.HandlePacket(&r, tcpip.PacketBuffer{
- Data: frag1.ToVectorisedView(),
- })
- if o.dataCalls != 0 {
- t.Fatalf("Bad number of data calls: got %x, want 0", o.dataCalls)
- }
-
- // Send second segment.
- ep.HandlePacket(&r, tcpip.PacketBuffer{
- Data: frag2.ToVectorisedView(),
- })
- if o.dataCalls != 1 {
- t.Fatalf("Bad number of data calls: got %x, want 1", o.dataCalls)
- }
-}
-
-func TestIPv6Send(t *testing.T) {
- o := testObject{t: t}
- proto := ipv6.NewProtocol()
- ep, err := proto.NewEndpoint(1, tcpip.AddressWithPrefix{localIpv6Addr, localIpv6PrefixLen}, nil, nil, &o)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- // Allocate and initialize the payload view.
- payload := buffer.NewView(100)
- for i := 0; i < len(payload); i++ {
- payload[i] = uint8(i)
- }
-
- // Allocate the header buffer.
- hdr := buffer.NewPrependable(int(ep.MaxHeaderLength()))
-
- // Issue the write.
- o.protocol = 123
- o.srcAddr = localIpv6Addr
- o.dstAddr = remoteIpv6Addr
- o.contents = payload
-
- r, err := buildIPv6Route(localIpv6Addr, remoteIpv6Addr)
- if err != nil {
- t.Fatalf("could not find route: %v", err)
- }
- if err := ep.WritePacket(&r, nil /* gso */, stack.NetworkHeaderParams{Protocol: 123, TTL: 123, TOS: stack.DefaultTOS}, stack.PacketOut, tcpip.PacketBuffer{
- Header: hdr,
- Data: payload.ToVectorisedView(),
- }); err != nil {
- t.Fatalf("WritePacket failed: %v", err)
- }
-}
-
-func TestIPv6Receive(t *testing.T) {
- o := testObject{t: t}
- proto := ipv6.NewProtocol()
- ep, err := proto.NewEndpoint(1, tcpip.AddressWithPrefix{localIpv6Addr, localIpv6PrefixLen}, nil, &o, nil)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- totalLen := header.IPv6MinimumSize + 30
- view := buffer.NewView(totalLen)
- ip := header.IPv6(view)
- ip.Encode(&header.IPv6Fields{
- PayloadLength: uint16(totalLen - header.IPv6MinimumSize),
- NextHeader: 10,
- HopLimit: 20,
- SrcAddr: remoteIpv6Addr,
- DstAddr: localIpv6Addr,
- })
-
- // Make payload be non-zero.
- for i := header.IPv6MinimumSize; i < totalLen; i++ {
- view[i] = uint8(i)
- }
-
- // Give packet to ipv6 endpoint, dispatcher will validate that it's ok.
- o.protocol = 10
- o.srcAddr = remoteIpv6Addr
- o.dstAddr = localIpv6Addr
- o.contents = view[header.IPv6MinimumSize:totalLen]
-
- r, err := buildIPv6Route(localIpv6Addr, remoteIpv6Addr)
- if err != nil {
- t.Fatalf("could not find route: %v", err)
- }
-
- ep.HandlePacket(&r, tcpip.PacketBuffer{
- Data: view.ToVectorisedView(),
- })
- if o.dataCalls != 1 {
- t.Fatalf("Bad number of data calls: got %x, want 1", o.dataCalls)
- }
-}
-
-func TestIPv6ReceiveControl(t *testing.T) {
- newUint16 := func(v uint16) *uint16 { return &v }
-
- const mtu = 0xffff
- const outerSrcAddr = "\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa"
- cases := []struct {
- name string
- expectedCount int
- fragmentOffset *uint16
- typ header.ICMPv6Type
- code uint8
- expectedTyp stack.ControlType
- expectedExtra uint32
- trunc int
- }{
- {"PacketTooBig", 1, nil, header.ICMPv6PacketTooBig, 0, stack.ControlPacketTooBig, mtu, 0},
- {"Truncated (10 bytes missing)", 0, nil, header.ICMPv6PacketTooBig, 0, stack.ControlPacketTooBig, mtu, 10},
- {"Truncated (missing IPv6 header)", 0, nil, header.ICMPv6PacketTooBig, 0, stack.ControlPacketTooBig, mtu, header.IPv6MinimumSize + 8},
- {"Truncated PacketTooBig (missing 'extra info')", 0, nil, header.ICMPv6PacketTooBig, 0, stack.ControlPacketTooBig, mtu, 4 + header.IPv6MinimumSize + 8},
- {"Truncated (missing ICMP header)", 0, nil, header.ICMPv6PacketTooBig, 0, stack.ControlPacketTooBig, mtu, header.ICMPv6PacketTooBigMinimumSize + header.IPv6MinimumSize + 8},
- {"Port unreachable", 1, nil, header.ICMPv6DstUnreachable, header.ICMPv6PortUnreachable, stack.ControlPortUnreachable, 0, 0},
- {"Truncated DstUnreachable (missing 'extra info')", 0, nil, header.ICMPv6DstUnreachable, header.ICMPv6PortUnreachable, stack.ControlPortUnreachable, 0, 4 + header.IPv6MinimumSize + 8},
- {"Fragmented, zero offset", 1, newUint16(0), header.ICMPv6DstUnreachable, header.ICMPv6PortUnreachable, stack.ControlPortUnreachable, 0, 0},
- {"Non-zero fragment offset", 0, newUint16(100), header.ICMPv6DstUnreachable, header.ICMPv6PortUnreachable, stack.ControlPortUnreachable, 0, 0},
- {"Zero-length packet", 0, nil, header.ICMPv6DstUnreachable, header.ICMPv6PortUnreachable, stack.ControlPortUnreachable, 0, 2*header.IPv6MinimumSize + header.ICMPv6DstUnreachableMinimumSize + 8},
- }
- r, err := buildIPv6Route(
- localIpv6Addr,
- "\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa",
- )
- if err != nil {
- t.Fatal(err)
- }
- for _, c := range cases {
- t.Run(c.name, func(t *testing.T) {
- o := testObject{t: t}
- proto := ipv6.NewProtocol()
- ep, err := proto.NewEndpoint(1, tcpip.AddressWithPrefix{localIpv6Addr, localIpv6PrefixLen}, nil, &o, nil)
- if err != nil {
- t.Fatalf("NewEndpoint failed: %v", err)
- }
-
- defer ep.Close()
-
- dataOffset := header.IPv6MinimumSize*2 + header.ICMPv6MinimumSize
- if c.fragmentOffset != nil {
- dataOffset += header.IPv6FragmentHeaderSize
- }
- view := buffer.NewView(dataOffset + 8)
-
- // Create the outer IPv6 header.
- ip := header.IPv6(view)
- ip.Encode(&header.IPv6Fields{
- PayloadLength: uint16(len(view) - header.IPv6MinimumSize - c.trunc),
- NextHeader: uint8(header.ICMPv6ProtocolNumber),
- HopLimit: 20,
- SrcAddr: outerSrcAddr,
- DstAddr: localIpv6Addr,
- })
-
- // Create the ICMP header.
- icmp := header.ICMPv6(view[header.IPv6MinimumSize:])
- icmp.SetType(c.typ)
- icmp.SetCode(c.code)
- icmp.SetIdent(0xdead)
- icmp.SetSequence(0xbeef)
-
- // Create the inner IPv6 header.
- ip = header.IPv6(view[header.IPv6MinimumSize+header.ICMPv6PayloadOffset:])
- ip.Encode(&header.IPv6Fields{
- PayloadLength: 100,
- NextHeader: 10,
- HopLimit: 20,
- SrcAddr: localIpv6Addr,
- DstAddr: remoteIpv6Addr,
- })
-
- // Build the fragmentation header if needed.
- if c.fragmentOffset != nil {
- ip.SetNextHeader(header.IPv6FragmentHeader)
- frag := header.IPv6Fragment(view[2*header.IPv6MinimumSize+header.ICMPv6MinimumSize:])
- frag.Encode(&header.IPv6FragmentFields{
- NextHeader: 10,
- FragmentOffset: *c.fragmentOffset,
- M: true,
- Identification: 0x12345678,
- })
- }
-
- // Make payload be non-zero.
- for i := dataOffset; i < len(view); i++ {
- view[i] = uint8(i)
- }
-
- // Give packet to IPv6 endpoint, dispatcher will validate that
- // it's ok.
- o.protocol = 10
- o.srcAddr = remoteIpv6Addr
- o.dstAddr = localIpv6Addr
- o.contents = view[dataOffset:]
- o.typ = c.expectedTyp
- o.extra = c.expectedExtra
-
- // Set ICMPv6 checksum.
- icmp.SetChecksum(header.ICMPv6Checksum(icmp, outerSrcAddr, localIpv6Addr, buffer.VectorisedView{}))
-
- ep.HandlePacket(&r, tcpip.PacketBuffer{
- Data: view[:len(view)-c.trunc].ToVectorisedView(),
- })
- if want := c.expectedCount; o.controlCalls != want {
- t.Fatalf("Bad number of control calls for %q case: got %v, want %v", c.name, o.controlCalls, want)
- }
- })
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 15:57:50 +0000