diff options
Diffstat (limited to 'sys/netinet/tcp_syncache.c')
-rw-r--r-- | sys/netinet/tcp_syncache.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c index 40defbe..e4c467e 100644 --- a/sys/netinet/tcp_syncache.c +++ b/sys/netinet/tcp_syncache.c @@ -1128,6 +1128,24 @@ syncache_respond(sc, m) th = (struct tcphdr *)(ip + 1); } + + ip->ip_ttl = sc->sc_tp->t_inpcb->inp_ip_ttl; /* XXX */ + ip->ip_tos = sc->sc_tp->t_inpcb->inp_ip_tos; /* XXX */ + + /* + * See if we should do MTU discovery. We do it only if the following + * are true: + * 1) we have a valid route to the destination + * 2) the MTU is not locked (if it is, then discovery has been + * disabled) + */ + if (path_mtu_discovery + && (rt != NULL) + && rt->rt_flags & RTF_UP + && !(rt->rt_rmx.rmx_locks & RTV_MTU)) { + ip->ip_off |= IP_DF; + } + th->th_sport = sc->sc_inc.inc_lport; th->th_dport = sc->sc_inc.inc_fport; |