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Improve PR-SCTP if used in combination with NR-SACK.

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Based on work done by Mohammad Rajiullah.

MFC after: 1 week
This commit is contained in:
Michael Tuexen 2012-11-07 20:59:00 +00:00
parent 38b2a8bd2d
commit 98f2956c11
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=242708
2 changed files with 6 additions and 2 deletions
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1
sys/netinet/sctp_constants.h
View File

@ -370,6 +370,7 @@ __FBSDID("$FreeBSD$");
#define SCTP_DATAGRAM_ACKED 10010
#define SCTP_DATAGRAM_MARKED 20010
#define SCTP_FORWARD_TSN_SKIP 30010
#define SCTP_DATAGRAM_NR_MARKED 40010
/* chunk output send from locations */
#define SCTP_OUTPUT_FROM_USR_SEND 0

7
sys/netinet/sctp_indata.c
View File

@ -2985,6 +2985,7 @@ sctp_process_segment_range(struct sctp_tcb *stcb, struct sctp_tmit_chunk **p_tp1
}
/* NR Sack code here */
if (nr_sacking) {
tp1->sent = SCTP_DATAGRAM_NR_MARKED;
if (tp1->data) {
/*
* sa_ignore
@ -3600,7 +3601,8 @@ sctp_try_advance_peer_ack_point(struct sctp_tcb *stcb,
}
TAILQ_FOREACH_SAFE(tp1, &asoc->sent_queue, sctp_next, tp2) {
if (tp1->sent != SCTP_FORWARD_TSN_SKIP &&
tp1->sent != SCTP_DATAGRAM_RESEND) {
tp1->sent != SCTP_DATAGRAM_RESEND &&
tp1->sent != SCTP_DATAGRAM_NR_MARKED) {
/* no chance to advance, out of here */
break;
}
@ -3653,7 +3655,8 @@ sctp_try_advance_peer_ack_point(struct sctp_tcb *stcb,
* the chunk, advance our peer ack point and we can check
* the next chunk.
*/
if (tp1->sent == SCTP_FORWARD_TSN_SKIP) {
if ((tp1->sent == SCTP_FORWARD_TSN_SKIP) ||
(tp1->sent == SCTP_DATAGRAM_NR_MARKED)) {
/* advance PeerAckPoint goes forward */
if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, asoc->advanced_peer_ack_point)) {
asoc->advanced_peer_ack_point = tp1->rec.data.TSN_seq;