diff options
Diffstat (limited to 'freebsd/sys/netinet/tcp_output.c')
| -rw-r--r-- | freebsd/sys/netinet/tcp_output.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/freebsd/sys/netinet/tcp_output.c b/freebsd/sys/netinet/tcp_output.c index 60276348..b641f04c 100644 --- a/freebsd/sys/netinet/tcp_output.c +++ b/freebsd/sys/netinet/tcp_output.c @@ -1174,14 +1174,18 @@ send: /* * Calculate receive window. Don't shrink window, * but avoid silly window syndrome. + * If a RST segment is sent, advertise a window of zero. */ - if (recwin < (so->so_rcv.sb_hiwat / 4) && - recwin < tp->t_maxseg) + if (flags & TH_RST) { recwin = 0; - if (SEQ_GT(tp->rcv_adv, tp->rcv_nxt) && - recwin < (tp->rcv_adv - tp->rcv_nxt)) - recwin = (tp->rcv_adv - tp->rcv_nxt); - + } else { + if (recwin < (so->so_rcv.sb_hiwat / 4) && + recwin < tp->t_maxseg) + recwin = 0; + if (SEQ_GT(tp->rcv_adv, tp->rcv_nxt) && + recwin < (tp->rcv_adv - tp->rcv_nxt)) + recwin = (tp->rcv_adv - tp->rcv_nxt); + } /* * According to RFC1323 the window field in a SYN (i.e., a <SYN> * or <SYN,ACK>) segment itself is never scaled. The <SYN,ACK> |