summaryrefslogtreecommitdiffhomepage
path: root/pkg/tcpip/stack
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/tcpip/stack')
-rw-r--r--pkg/tcpip/stack/BUILD1
-rw-r--r--pkg/tcpip/stack/dhcpv6configurationfromndpra_string.go39
-rw-r--r--pkg/tcpip/stack/ndp.go29
-rw-r--r--pkg/tcpip/stack/ndp_test.go39
4 files changed, 97 insertions, 11 deletions
diff --git a/pkg/tcpip/stack/BUILD b/pkg/tcpip/stack/BUILD
index 705cf01ee..8febd54c8 100644
--- a/pkg/tcpip/stack/BUILD
+++ b/pkg/tcpip/stack/BUILD
@@ -18,6 +18,7 @@ go_template_instance(
go_library(
name = "stack",
srcs = [
+ "dhcpv6configurationfromndpra_string.go",
"icmp_rate_limit.go",
"linkaddrcache.go",
"linkaddrentry_list.go",
diff --git a/pkg/tcpip/stack/dhcpv6configurationfromndpra_string.go b/pkg/tcpip/stack/dhcpv6configurationfromndpra_string.go
new file mode 100644
index 000000000..8b4213eec
--- /dev/null
+++ b/pkg/tcpip/stack/dhcpv6configurationfromndpra_string.go
@@ -0,0 +1,39 @@
+// 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.
+
+// Code generated by "stringer -type=DHCPv6ConfigurationFromNDPRA"; DO NOT EDIT.
+
+package stack
+
+import "strconv"
+
+func _() {
+ // An "invalid array index" compiler error signifies that the constant values have changed.
+ // Re-run the stringer command to generate them again.
+ var x [1]struct{}
+ _ = x[DHCPv6NoConfiguration-0]
+ _ = x[DHCPv6ManagedAddress-1]
+ _ = x[DHCPv6OtherConfigurations-2]
+}
+
+const _DHCPv6ConfigurationFromNDPRA_name = "DHCPv6NoConfigurationDHCPv6ManagedAddressDHCPv6OtherConfigurations"
+
+var _DHCPv6ConfigurationFromNDPRA_index = [...]uint8{0, 21, 41, 66}
+
+func (i DHCPv6ConfigurationFromNDPRA) String() string {
+ if i < 0 || i >= DHCPv6ConfigurationFromNDPRA(len(_DHCPv6ConfigurationFromNDPRA_index)-1) {
+ return "DHCPv6ConfigurationFromNDPRA(" + strconv.FormatInt(int64(i), 10) + ")"
+ }
+ return _DHCPv6ConfigurationFromNDPRA_name[_DHCPv6ConfigurationFromNDPRA_index[i]:_DHCPv6ConfigurationFromNDPRA_index[i+1]]
+}
diff --git a/pkg/tcpip/stack/ndp.go b/pkg/tcpip/stack/ndp.go
index f651871ce..a9f4d5dad 100644
--- a/pkg/tcpip/stack/ndp.go
+++ b/pkg/tcpip/stack/ndp.go
@@ -1220,9 +1220,15 @@ func (ndp *ndpState) startSolicitingRouters() {
}
ndp.rtrSolicitTimer = time.AfterFunc(delay, func() {
- // Send an RS message with the unspecified source address.
- ref := ndp.nic.getRefOrCreateTemp(header.IPv6ProtocolNumber, header.IPv6Any, NeverPrimaryEndpoint, forceSpoofing)
- r := makeRoute(header.IPv6ProtocolNumber, header.IPv6Any, header.IPv6AllRoutersMulticastAddress, ndp.nic.linkEP.LinkAddress(), ref, false, false)
+ // As per RFC 4861 section 4.1, the source of the RS is an address assigned
+ // to the sending interface, or the unspecified address if no address is
+ // assigned to the sending interface.
+ ref := ndp.nic.primaryIPv6Endpoint(header.IPv6AllRoutersMulticastAddress)
+ if ref == nil {
+ ref = ndp.nic.getRefOrCreateTemp(header.IPv6ProtocolNumber, header.IPv6Any, NeverPrimaryEndpoint, forceSpoofing)
+ }
+ localAddr := ref.ep.ID().LocalAddress
+ r := makeRoute(header.IPv6ProtocolNumber, localAddr, header.IPv6AllRoutersMulticastAddress, ndp.nic.linkEP.LinkAddress(), ref, false, false)
defer r.Release()
// Route should resolve immediately since
@@ -1234,10 +1240,25 @@ func (ndp *ndpState) startSolicitingRouters() {
log.Fatalf("ndp: route resolution not immediate for route to send NDP RS (%s -> %s on NIC(%d))", header.IPv6Any, header.IPv6AllRoutersMulticastAddress, ndp.nic.ID())
}
- payloadSize := header.ICMPv6HeaderSize + header.NDPRSMinimumSize
+ // As per RFC 4861 section 4.1, an NDP RS SHOULD include the source
+ // link-layer address option if the source address of the NDP RS is
+ // specified. This option MUST NOT be included if the source address is
+ // unspecified.
+ //
+ // TODO(b/141011931): Validate a LinkEndpoint's link address (provided by
+ // LinkEndpoint.LinkAddress) before reaching this point.
+ var optsSerializer header.NDPOptionsSerializer
+ if localAddr != header.IPv6Any && header.IsValidUnicastEthernetAddress(r.LocalLinkAddress) {
+ optsSerializer = header.NDPOptionsSerializer{
+ header.NDPSourceLinkLayerAddressOption(r.LocalLinkAddress),
+ }
+ }
+ payloadSize := header.ICMPv6HeaderSize + header.NDPRSMinimumSize + int(optsSerializer.Length())
hdr := buffer.NewPrependable(int(r.MaxHeaderLength()) + payloadSize)
pkt := header.ICMPv6(hdr.Prepend(payloadSize))
pkt.SetType(header.ICMPv6RouterSolicit)
+ rs := header.NDPRouterSolicit(pkt.NDPPayload())
+ rs.Options().Serialize(optsSerializer)
pkt.SetChecksum(header.ICMPv6Checksum(pkt, r.LocalAddress, r.RemoteAddress, buffer.VectorisedView{}))
sent := r.Stats().ICMP.V6PacketsSent
diff --git a/pkg/tcpip/stack/ndp_test.go b/pkg/tcpip/stack/ndp_test.go
index 6e9306d09..98b1c807c 100644
--- a/pkg/tcpip/stack/ndp_test.go
+++ b/pkg/tcpip/stack/ndp_test.go
@@ -3384,6 +3384,10 @@ func TestRouterSolicitation(t *testing.T) {
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
@@ -3392,6 +3396,7 @@ func TestRouterSolicitation(t *testing.T) {
}{
{
name: "Single RS with delay",
+ expectedSrcAddr: header.IPv6Any,
maxRtrSolicit: 1,
rtrSolicitInt: time.Second,
effectiveRtrSolicitInt: time.Second,
@@ -3401,6 +3406,8 @@ func TestRouterSolicitation(t *testing.T) {
{
name: "Two RS with delay",
linkHeaderLen: 1,
+ nicAddr: llAddr1,
+ expectedSrcAddr: llAddr1,
maxRtrSolicit: 2,
rtrSolicitInt: time.Second,
effectiveRtrSolicitInt: time.Second,
@@ -3408,8 +3415,14 @@ func TestRouterSolicitation(t *testing.T) {
effectiveMaxRtrSolicitDelay: 500 * time.Millisecond,
},
{
- name: "Single RS without delay",
- linkHeaderLen: 2,
+ name: "Single RS without delay",
+ linkHeaderLen: 2,
+ linkAddr: linkAddr1,
+ nicAddr: llAddr1,
+ expectedSrcAddr: llAddr1,
+ expectedNDPOpts: []header.NDPOption{
+ header.NDPSourceLinkLayerAddressOption(linkAddr1),
+ },
maxRtrSolicit: 1,
rtrSolicitInt: time.Second,
effectiveRtrSolicitInt: time.Second,
@@ -3419,6 +3432,8 @@ func TestRouterSolicitation(t *testing.T) {
{
name: "Two RS without delay and invalid zero interval",
linkHeaderLen: 3,
+ linkAddr: linkAddr1,
+ expectedSrcAddr: header.IPv6Any,
maxRtrSolicit: 2,
rtrSolicitInt: 0,
effectiveRtrSolicitInt: 4 * time.Second,
@@ -3427,6 +3442,8 @@ func TestRouterSolicitation(t *testing.T) {
},
{
name: "Three RS without delay",
+ linkAddr: linkAddr1,
+ expectedSrcAddr: header.IPv6Any,
maxRtrSolicit: 3,
rtrSolicitInt: 500 * time.Millisecond,
effectiveRtrSolicitInt: 500 * time.Millisecond,
@@ -3435,6 +3452,8 @@ func TestRouterSolicitation(t *testing.T) {
},
{
name: "Two RS with invalid negative delay",
+ linkAddr: linkAddr1,
+ expectedSrcAddr: header.IPv6Any,
maxRtrSolicit: 2,
rtrSolicitInt: time.Second,
effectiveRtrSolicitInt: time.Second,
@@ -3457,7 +3476,7 @@ func TestRouterSolicitation(t *testing.T) {
t.Run(test.name, func(t *testing.T) {
t.Parallel()
e := channelLinkWithHeaderLength{
- Endpoint: channel.New(int(test.maxRtrSolicit), 1280, linkAddr1),
+ Endpoint: channel.New(int(test.maxRtrSolicit), 1280, test.linkAddr),
headerLength: test.linkHeaderLen,
}
e.Endpoint.LinkEPCapabilities |= stack.CapabilityResolutionRequired
@@ -3481,10 +3500,10 @@ func TestRouterSolicitation(t *testing.T) {
checker.IPv6(t,
p.Pkt.Header.View(),
- checker.SrcAddr(header.IPv6Any),
+ checker.SrcAddr(test.expectedSrcAddr),
checker.DstAddr(header.IPv6AllRoutersMulticastAddress),
checker.TTL(header.NDPHopLimit),
- checker.NDPRS(),
+ checker.NDPRS(checker.NDPRSOptions(test.expectedNDPOpts)),
)
if l, want := p.Pkt.Header.AvailableLength(), int(test.linkHeaderLen); l != want {
@@ -3510,13 +3529,19 @@ func TestRouterSolicitation(t *testing.T) {
t.Fatalf("CreateNIC(%d, _) = %s", nicID, err)
}
- // Make sure each RS got sent at the right
- // times.
+ 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 + defaultAsyncEventTimeout)
remaining--
}
+
for ; remaining > 0; remaining-- {
waitForNothing(test.effectiveRtrSolicitInt - defaultTimeout)
waitForPkt(defaultAsyncEventTimeout)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 16:55:56 +0000