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Commit d15c9ede authored by Xin Long's avatar Xin Long Committed by David S. Miller
Browse files

sctp: process fwd tsn chunk only when prsctp is enabled 



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: default avatarJulian Cordes <julian.cordes@gmail.com>
Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3bc32d03

net/sctp/sm_statefuns.c

+6 −0
Original line number Diff line number Diff line
@@ -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,