diff options
| -rw-r--r-- | sys/netinet/tcp_input.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index dfed21fb290..2a35751efa5 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_input.c,v 1.167 2004/05/07 14:42:27 millert Exp $ */ +/* $OpenBSD: tcp_input.c,v 1.168 2004/05/21 11:36:23 markus Exp $ */ /* $NetBSD: tcp_input.c,v 1.23 1996/02/13 23:43:44 christos Exp $ */ /* @@ -3068,15 +3068,17 @@ tcp_mss(tp, offer) * If we compute a larger value, return it for use in sending * a max seg size option, but don't store it for use * unless we received an offer at least that large from peer. - * However, do not accept offers under 216 bytes unless the - * interface MTU is actually that low. + * + * However, do not accept offers lower than the minimum of + * the interface MTU and 216. */ if (offer > 0) tp->t_peermss = offer; if (tp->t_peermss) - mss = min(mss, tp->t_peermss); + mss = min(mss, max(tp->t_peermss, 216)); + /* sanity - at least max opt. space */ - mss = max(mss, min(216, ifp->if_mtu - iphlen - sizeof(struct tcphdr))); + mss = max(mss, 64); /* * maxopd stores the maximum length of data AND options |