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authorNeil Horman <nhorman@tuxdriver.com>2012-11-20 10:14:30 +0000
committerDavid S. Miller <davem@davemloft.net>2012-11-20 15:50:37 -0500
commitde4594a51c904ddcd6c3a6cdd100f7c1d94d3239 (patch)
tree717425cdc0617de66ac42d14902f09ee513db856 /net/sctp/sm_make_chunk.c
parent388dfc2d2d9c43c251921a397d6fe5ef7dc34731 (diff)
downloadop-kernel-dev-de4594a51c904ddcd6c3a6cdd100f7c1d94d3239.zip
op-kernel-dev-de4594a51c904ddcd6c3a6cdd100f7c1d94d3239.tar.gz
sctp: send abort chunk when max_retrans exceeded
In the event that an association exceeds its max_retrans attempts, we should send an ABORT chunk indicating that we are closing the assocation as a result. Because of the nature of the error, its unlikely to be received, but its a nice clean way to close the association if it does make it through, and it will give anyone watching via tcpdump a clue as to what happened. Change notes: v2) * Removed erroneous changes from sctp_make_violation_parmlen Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: linux-sctp@vger.kernel.org Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/sm_make_chunk.c')
-rw-r--r--net/sctp/sm_make_chunk.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index fbe1636..e0f01a4 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1090,6 +1090,25 @@ nodata:
return retval;
}
+struct sctp_chunk *sctp_make_violation_max_retrans(
+ const struct sctp_association *asoc,
+ const struct sctp_chunk *chunk)
+{
+ struct sctp_chunk *retval;
+ static const char error[] = "Association exceeded its max_retans count";
+ size_t payload_len = sizeof(error) + sizeof(sctp_errhdr_t);
+
+ retval = sctp_make_abort(asoc, chunk, payload_len);
+ if (!retval)
+ goto nodata;
+
+ sctp_init_cause(retval, SCTP_ERROR_PROTO_VIOLATION, sizeof(error));
+ sctp_addto_chunk(retval, sizeof(error), error);
+
+nodata:
+ return retval;
+}
+
/* Make a HEARTBEAT chunk. */
struct sctp_chunk *sctp_make_heartbeat(const struct sctp_association *asoc,
const struct sctp_transport *transport)
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