diff options
| author | peter <peter@FreeBSD.org> | 2014-01-07 23:00:58 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 2014-01-07 23:00:58 +0000 |
| commit | 16f467cacd9531b98ef3bdb9c5aebd852492b946 (patch) | |
| tree | 587d1013f20dbbeec8183f72d4b990e9cec840f0 /sys/netinet/tcp_input.c | |
| parent | be72cc437326f10825234aacc2959c78ac87f1ee (diff) | |
| download | FreeBSD-src-16f467cacd9531b98ef3bdb9c5aebd852492b946.zip FreeBSD-src-16f467cacd9531b98ef3bdb9c5aebd852492b946.tar.gz | |
MFC r258821 - fix tcp simultaneous close
PR: kern/99188
Diffstat (limited to 'sys/netinet/tcp_input.c')
| -rw-r--r-- | sys/netinet/tcp_input.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 36a665a..e486fcf 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -2429,13 +2429,15 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, hhook_run_tcp_est_in(tp, th, &to); if (SEQ_LEQ(th->th_ack, tp->snd_una)) { - if (tlen == 0 && tiwin == tp->snd_wnd) { + if (tlen == 0 && tiwin == tp->snd_wnd && + !(thflags & TH_FIN)) { TCPSTAT_INC(tcps_rcvdupack); /* * If we have outstanding data (other than * a window probe), this is a completely * duplicate ack (ie, window info didn't - * change), the ack is the biggest we've + * change and FIN isn't set), + * the ack is the biggest we've * seen and we've seen exactly our rexmt * threshhold of them, assume a packet * has been dropped and retransmit it. |
