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sctp: process fwd tsn chunk only when prsctp is enabled

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This patch is to check if asoc->peer.prsctp_capable is set before
processing fwd tsn chunk, if not, it will return an ERROR to the
peer, just as rfc3758 section 3.3.1 demands.

Reported-by: Julian Cordes <julian.cordes@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2017-02-03 17:37:06 +08:00 committed by David S. Miller
parent 3bc32d0396
commit d15c9ede61
1 changed files with 6 additions and 0 deletions
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6
net/sctp/sm_statefuns.c
View file

@ -3867,6 +3867,9 @@ sctp_disposition_t sctp_sf_eat_fwd_tsn(struct net *net,
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
if (!asoc->peer.prsctp_capable)
return sctp_sf_unk_chunk(net, ep, asoc, type, arg, commands);
/* Make sure that the FORWARD_TSN chunk has valid length. */
if (!sctp_chunk_length_valid(chunk, sizeof(struct sctp_fwdtsn_chunk)))
return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,
@ -3935,6 +3938,9 @@ sctp_disposition_t sctp_sf_eat_fwd_tsn_fast(
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
if (!asoc->peer.prsctp_capable)
return sctp_sf_unk_chunk(net, ep, asoc, type, arg, commands);
/* Make sure that the FORWARD_TSN chunk has a valid length. */
if (!sctp_chunk_length_valid(chunk, sizeof(struct sctp_fwdtsn_chunk)))
return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,