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| author | Ghanan Gowripalan <ghanan@google.com> | 2019-10-17 13:05:03 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-10-17 13:06:15 -0700 |
| commit | 962aa235de4e614147dd00b55967614e93ba2660 (patch) | |
| tree | ed26888ec7163ddedcd019e7f8b850b488ca9cc8 /pkg/tcpip/header/icmpv6.go | |
| parent | 06ed9e329d46268cf12fe07bd3974c5d54ae7e0b (diff) | |
NDP Neighbor Solicitations sent during DAD must have an IP hop limit of 255
NDP Neighbor Solicitations sent during Duplicate Address Detection must have an
IP hop limit of 255, as all NDP Neighbor Solicitations should have.
Test: Test that DAD messages have the IPv6 hop limit field set to 255.
PiperOrigin-RevId: 275321680
Diffstat (limited to 'pkg/tcpip/header/icmpv6.go')
| -rw-r--r-- | pkg/tcpip/header/icmpv6.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/pkg/tcpip/header/icmpv6.go b/pkg/tcpip/header/icmpv6.go index e51c5098c..c2bfd8c79 100644 --- a/pkg/tcpip/header/icmpv6.go +++ b/pkg/tcpip/header/icmpv6.go @@ -80,6 +80,13 @@ const ( // icmpv6SequenceOffset is the offset of the sequence field // in a ICMPv6 Echo Request/Reply message. icmpv6SequenceOffset = 6 + + // NDPHopLimit is the expected IP hop limit value of 255 for received + // NDP packets, as per RFC 4861 sections 4.1 - 4.5, 6.1.1, 6.1.2, 7.1.1, + // 7.1.2 and 8.1. If the hop limit value is not 255, nodes MUST silently + // drop the NDP packet. All outgoing NDP packets must use this value for + // its IP hop limit field. + NDPHopLimit = 255 ) // ICMPv6Type is the ICMP type field described in RFC 4443 and friends. |