Don't bundle a SACK chunk with a SHUTDOWN chunk if it is not required.
MFC after: 1 week
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ebecdad811
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=309744
@ -2437,13 +2437,17 @@ sctp_sack_check(struct sctp_tcb *stcb, int was_a_gap)
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{
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struct sctp_association *asoc;
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uint32_t highest_tsn;
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int is_a_gap;
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sctp_slide_mapping_arrays(stcb);
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asoc = &stcb->asoc;
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if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->highest_tsn_inside_map)) {
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highest_tsn = asoc->highest_tsn_inside_nr_map;
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} else {
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highest_tsn = asoc->highest_tsn_inside_map;
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}
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/* Is there a gap now? */
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is_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
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/*
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* Now we need to see if we need to queue a sack or just start the
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@ -2462,13 +2466,10 @@ sctp_sack_check(struct sctp_tcb *stcb, int was_a_gap)
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}
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sctp_send_shutdown(stcb,
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((stcb->asoc.alternate) ? stcb->asoc.alternate : stcb->asoc.primary_destination));
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if (is_a_gap) {
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sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
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}
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} else {
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int is_a_gap;
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/* is there a gap now ? */
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is_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
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/*
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* CMT DAC algorithm: increase number of packets received
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* since last ack
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