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Commit d0ce9291 authored by Vlad Yasevich's avatar Vlad Yasevich
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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: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
parent cc75689a

net/sctp/outqueue.c

+7 −0
Original line number Diff line number Diff line
@@ -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