diff options
Diffstat (limited to 'sys/netinet/tcp_subr.c')
| -rw-r--r-- | sys/netinet/tcp_subr.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index 27e9bd25203..c46ec66bc9a 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_subr.c,v 1.77 2004/03/02 12:51:12 markus Exp $ */ +/* $OpenBSD: tcp_subr.c,v 1.78 2004/04/26 18:12:25 frantzen Exp $ */ /* $NetBSD: tcp_subr.c,v 1.22 1996/02/13 23:44:00 christos Exp $ */ /* @@ -1018,8 +1018,10 @@ tcp_mtudisc(inp, errno) { struct tcpcb *tp = intotcpcb(inp); struct rtentry *rt = in_pcbrtentry(inp); + int change = 0; if (tp != 0) { + int orig_maxseg = tp->t_maxseg; if (rt != 0) { /* * If this was not a host route, remove and realloc. @@ -1029,18 +1031,18 @@ tcp_mtudisc(inp, errno) if ((rt = in_pcbrtentry(inp)) == 0) return; } - - if (rt->rt_rmx.rmx_mtu != 0) { - /* also takes care of congestion window */ - tcp_mss(tp, -1); - } + if (orig_maxseg != tp->t_maxseg || + (rt->rt_rmx.rmx_locks & RTV_MTU)) + change = 1; } + tcp_mss(tp, -1); /* - * Resend unacknowledged packets. + * Resend unacknowledged packets */ tp->snd_nxt = tp->snd_una; - tcp_output(tp); + if (change || errno > 0) + tcp_output(tp); } } |