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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-08-24 19:37:46 +0900
committerVlad Yasevich <vladislav.yasevich@hp.com>2007-08-30 13:56:06 -0400
commitd0ce92910bc04e107b2f3f2048f07e94f570035d (patch)
tree9c207786faf64e210d4e3e9c0a2388a0576b4cf8 /net
parentcc75689a4c4eb94b2fd7e3870347b9237ab39503 (diff)
downloadop-kernel-dev-d0ce92910bc04e107b2f3f2048f07e94f570035d.zip
op-kernel-dev-d0ce92910bc04e107b2f3f2048f07e94f570035d.tar.gz
SCTP: Do not retransmit chunks that are newer then rtt.
When performing a retransmit, do not include the chunk if it was sent less then 1 rtt ago. The reason is that we may receive the SACK very soon and wouldn't retransmit. Suggested by Randy Stewart. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/outqueue.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 992f361..28f4fe7 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -421,6 +421,13 @@ void sctp_retransmit_mark(struct sctp_outq *q,
*/
if ((fast_retransmit && (chunk->fast_retransmit > 0)) ||
(!fast_retransmit && !chunk->tsn_gap_acked)) {
+ /* If this chunk was sent less then 1 rto ago, do not
+ * retransmit this chunk, but give the peer time
+ * to acknowlege it.
+ */
+ if ((jiffies - chunk->sent_at) < transport->rto)
+ continue;
+
/* RFC 2960 6.2.1 Processing a Received SACK
*
* C) Any time a DATA chunk is marked for
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