diff options
| -rw-r--r-- | sys/netinet/tcp_sack.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sys/netinet/tcp_sack.c b/sys/netinet/tcp_sack.c index 37db30007580..f8d983da723b 100644 --- a/sys/netinet/tcp_sack.c +++ b/sys/netinet/tcp_sack.c @@ -831,8 +831,18 @@ tcp_sack_partialack(struct tcpcb *tp, struct tcphdr *th) (tp->snd_recover == tp->snd_max) && TAILQ_EMPTY(&tp->snd_holes) && (tp->sackhint.delivered_data > 0)) { - struct sackhole *hole; - hole = tcp_sackhole_insert(tp, SEQ_MAX(th->th_ack, tp->snd_max - maxseg), tp->snd_max, NULL); + /* + * Exclude FIN sequence space in + * the hole for the rescue retransmission, + * and also don't create a hole, if only + * the ACK for a FIN is outstanding. + */ + tcp_seq highdata = tp->snd_max; + if (tp->t_flags & TF_SENTFIN) + highdata--; + if (th->th_ack != highdata) + (void)tcp_sackhole_insert(tp, SEQ_MAX(th->th_ack, + highdata - maxseg), highdata, NULL); } (void) tp->t_fb->tfb_tcp_output(tp); } |