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From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Sat, 6 Nov 2010 13:43:19 +0000 (UTC)
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Subject: svn commit: r214877 - head/sys/netinet
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Author: tuexen
Date: Sat Nov  6 13:43:18 2010
New Revision: 214877
URL: http://svn.freebsd.org/changeset/base/214877

Log:
  Do not resend DATA chunks without delay when dropped by the peer and
  the CRC was correct.
  
  MFC after: 3 days.

Modified:
  head/sys/netinet/sctp_input.c

Modified: head/sys/netinet/sctp_input.c
==============================================================================
--- head/sys/netinet/sctp_input.c	Sat Nov  6 13:30:54 2010	(r214876)
+++ head/sys/netinet/sctp_input.c	Sat Nov  6 13:43:18 2010	(r214877)
@@ -3115,6 +3115,10 @@ process_chunk_drop(struct sctp_tcb *stcb
 			if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
 				uint8_t *ddp;
 
+				if (((flg & SCTP_BADCRC) == 0) &&
+				    ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
+					return (0);
+				}
 				if ((stcb->asoc.peers_rwnd == 0) &&
 				    ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
 					SCTP_STAT_INCR(sctps_pdrpdiwnp);