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| author | Ryan Heacock <rheacock@google.com> | 2020-11-19 18:13:24 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-11-19 18:15:25 -0800 |
| commit | fbc4a8dbd1d1939854dbeb6ccfd4c6267f85c9ec (patch) | |
| tree | 9a56ce31c4bddc087212837f3094bff8ee44739c /pkg/tcpip/header/ipv4.go | |
| parent | 9c553f2d4e4b0f2c3d296d0dfac6a31579b60347 (diff) | |
Perform IGMPv2 when joining IPv4 multicast groups
Added headers, stats, checksum parsing capabilities from RFC 2236 describing
IGMPv2.
IGMPv2 state machine is implemented for each condition, sending and receiving
IGMP Membership Reports and Leave Group messages with backwards compatibility
with IGMPv1 routers.
Test:
* Implemented igmp header parser and checksum calculator in header/igmp_test.go
* ipv4/igmp_test.go tests incoming and outgoing IGMP messages and pathways.
* Added unit test coverage for IGMPv2 RFC behavior + IGMPv1 backwards
compatibility in ipv4/igmp_test.go.
Fixes #4682
PiperOrigin-RevId: 343408809
Diffstat (limited to 'pkg/tcpip/header/ipv4.go')
| -rw-r--r-- | pkg/tcpip/header/ipv4.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pkg/tcpip/header/ipv4.go b/pkg/tcpip/header/ipv4.go index 91fe7b6a5..5fddd2af6 100644 --- a/pkg/tcpip/header/ipv4.go +++ b/pkg/tcpip/header/ipv4.go @@ -157,6 +157,9 @@ const ( // IPv4Any is the non-routable IPv4 "any" meta address. IPv4Any tcpip.Address = "\x00\x00\x00\x00" + // IPv4AllRoutersGroup is a multicast address for all routers. + IPv4AllRoutersGroup tcpip.Address = "\xe0\x00\x00\x02" + // IPv4MinimumProcessableDatagramSize is the minimum size of an IP // packet that every IPv4 capable host must be able to // process/reassemble. |