diff options
Diffstat (limited to 'sys/netinet/tcp_sack.c')
| -rw-r--r-- | sys/netinet/tcp_sack.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sys/netinet/tcp_sack.c b/sys/netinet/tcp_sack.c index f8d983da723b..08ce2a0882b1 100644 --- a/sys/netinet/tcp_sack.c +++ b/sys/netinet/tcp_sack.c @@ -491,7 +491,7 @@ static struct sackhole * tcp_sackhole_insert(struct tcpcb *tp, tcp_seq start, tcp_seq end, struct sackhole *after) { - struct sackhole *hole; + struct sackhole *hole, *tail; /* Allocate a new SACK hole. */ hole = tcp_sackhole_alloc(tp, start, end); @@ -502,7 +502,15 @@ tcp_sackhole_insert(struct tcpcb *tp, tcp_seq start, tcp_seq end, if (after != NULL) TAILQ_INSERT_AFTER(&tp->snd_holes, after, hole, scblink); else - TAILQ_INSERT_TAIL(&tp->snd_holes, hole, scblink); + /* + * With Rescue Retransmission, new holes may need to + * be inserted just before the tail. + */ + if (((tail = TAILQ_LAST_FAST(&tp->snd_holes, sackhole, + scblink)) != NULL) && SEQ_LEQ(end, tail->start)) + TAILQ_INSERT_BEFORE(tail, hole, scblink); + else + TAILQ_INSERT_TAIL(&tp->snd_holes, hole, scblink); /* Update SACK hint. */ if (tp->sackhint.nexthole == NULL) |