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| author | Francois-Xavier Le Bail <devel.fx.lebail@orange.fr> | 2020-05-14 17:08:54 +0200 |
|---|---|---|
| committer | Francois-Xavier Le Bail <devel.fx.lebail@orange.fr> | 2020-05-14 17:14:40 +0200 |
| commit | e199894a8a745b65814db606deb0af77b6f147ff (patch) | |
| tree | ed76194692a2c8200f55b8a1b964d5559ef36bde /print-ip-demux.c | |
| parent | 2c377170bdc3d16b85185cacaebc4601ddc19bfe (diff) | |
| download | tcpdump-e199894a8a745b65814db606deb0af77b6f147ff.tar.gz | |
IPv4/IPv6 demux: IGMP in IPv6 is invalid
"4. Message Formats
IGMP messages are encapsulated in IPv4 datagrams, with an IP protocol
number of 2."
(RFC 3376)
Diffstat (limited to 'print-ip-demux.c')
| -rw-r--r-- | print-ip-demux.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/print-ip-demux.c b/print-ip-demux.c index 9d562d77..7df0f709 100644 --- a/print-ip-demux.c +++ b/print-ip-demux.c @@ -161,7 +161,13 @@ again: break; case IPPROTO_IGMP: - igmp_print(ndo, bp, length); + if (ver == 4) + igmp_print(ndo, bp, length); + else { + ND_PRINT("[%s requires IPv4]", + tok2str(ipproto_values,"unknown",nh)); + nd_print_invalid(ndo); + } break; case IPPROTO_IPV4: |