[PATCH net-next] sctp: process fwd tsn chunk only when prsctp is enabled
From: Xin Long <lucien.xin@gmail.com>
Date: 2017-02-03 09:37:14
Also in:
linux-sctp
Subsystem:
networking [general], sctp protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Marcelo Ricardo Leitner, Xin Long, Linus Torvalds
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 <redacted> Signed-off-by: Xin Long <lucien.xin@gmail.com> --- net/sctp/sm_statefuns.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 782e579..d8798dd 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c@@ -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,
--
2.1.0