Improve PR-SCTP if used in combination with NR-SACK.
Based on work done by Mohammad Rajiullah. MFC after: 1 week
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@ -370,6 +370,7 @@ __FBSDID("$FreeBSD$");
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#define SCTP_DATAGRAM_ACKED 10010
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#define SCTP_DATAGRAM_MARKED 20010
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#define SCTP_FORWARD_TSN_SKIP 30010
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#define SCTP_DATAGRAM_NR_MARKED 40010
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/* chunk output send from locations */
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#define SCTP_OUTPUT_FROM_USR_SEND 0
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@ -2985,6 +2985,7 @@ sctp_process_segment_range(struct sctp_tcb *stcb, struct sctp_tmit_chunk **p_tp1
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}
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/* NR Sack code here */
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if (nr_sacking) {
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tp1->sent = SCTP_DATAGRAM_NR_MARKED;
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if (tp1->data) {
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/*
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* sa_ignore
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@ -3600,7 +3601,8 @@ sctp_try_advance_peer_ack_point(struct sctp_tcb *stcb,
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}
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TAILQ_FOREACH_SAFE(tp1, &asoc->sent_queue, sctp_next, tp2) {
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if (tp1->sent != SCTP_FORWARD_TSN_SKIP &&
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tp1->sent != SCTP_DATAGRAM_RESEND) {
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tp1->sent != SCTP_DATAGRAM_RESEND &&
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tp1->sent != SCTP_DATAGRAM_NR_MARKED) {
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/* no chance to advance, out of here */
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break;
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}
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@ -3653,7 +3655,8 @@ sctp_try_advance_peer_ack_point(struct sctp_tcb *stcb,
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* the chunk, advance our peer ack point and we can check
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* the next chunk.
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*/
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if (tp1->sent == SCTP_FORWARD_TSN_SKIP) {
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if ((tp1->sent == SCTP_FORWARD_TSN_SKIP) ||
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(tp1->sent == SCTP_DATAGRAM_NR_MARKED)) {
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/* advance PeerAckPoint goes forward */
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if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, asoc->advanced_peer_ack_point)) {
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asoc->advanced_peer_ack_point = tp1->rec.data.TSN_seq;
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