diff options
Diffstat (limited to 'sys/netinet6/ip6_output.c')
| -rw-r--r-- | sys/netinet6/ip6_output.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c index dc1eeb4..f31679e 100644 --- a/sys/netinet6/ip6_output.c +++ b/sys/netinet6/ip6_output.c @@ -150,9 +150,10 @@ static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int, static int ip6_insert_jumboopt(struct ip6_exthdrs *, u_int32_t); static int ip6_splithdr(struct mbuf *, struct ip6_exthdrs *); static int ip6_getpmtu(struct route_in6 *, int, - struct ifnet *, const struct in6_addr *, u_long *, int *, u_int); + struct ifnet *, const struct in6_addr *, u_long *, int *, u_int, + u_int); static int ip6_calcmtu(struct ifnet *, const struct in6_addr *, u_long, - u_long *, int *); + u_long *, int *, u_int); static int ip6_getpmtu_ctl(u_int, const struct in6_addr *, u_long *); static int copypktopts(struct ip6_pktopts *, struct ip6_pktopts *, int); @@ -718,7 +719,7 @@ again: /* Determine path MTU. */ if ((error = ip6_getpmtu(ro_pmtu, ro != ro_pmtu, ifp, &ip6->ip6_dst, - &mtu, &alwaysfrag, fibnum)) != 0) + &mtu, &alwaysfrag, fibnum, *nexthdrp)) != 0) goto bad; /* @@ -1251,7 +1252,7 @@ ip6_getpmtu_ctl(u_int fibnum, const struct in6_addr *dst, u_long *mtup) ifp = nh6.nh_ifp; mtu = nh6.nh_mtu; - error = ip6_calcmtu(ifp, dst, mtu, mtup, NULL); + error = ip6_calcmtu(ifp, dst, mtu, mtup, NULL, 0); fib6_free_nh_ext(fibnum, &nh6); return (error); @@ -1270,7 +1271,7 @@ ip6_getpmtu_ctl(u_int fibnum, const struct in6_addr *dst, u_long *mtup) static int ip6_getpmtu(struct route_in6 *ro_pmtu, int do_lookup, struct ifnet *ifp, const struct in6_addr *dst, u_long *mtup, - int *alwaysfragp, u_int fibnum) + int *alwaysfragp, u_int fibnum, u_int proto) { struct nhop6_basic nh6; struct in6_addr kdst; @@ -1308,7 +1309,7 @@ ip6_getpmtu(struct route_in6 *ro_pmtu, int do_lookup, if (ro_pmtu->ro_rt) mtu = ro_pmtu->ro_rt->rt_mtu; - return (ip6_calcmtu(ifp, dst, mtu, mtup, alwaysfragp)); + return (ip6_calcmtu(ifp, dst, mtu, mtup, alwaysfragp, proto)); } /* @@ -1320,7 +1321,7 @@ ip6_getpmtu(struct route_in6 *ro_pmtu, int do_lookup, */ static int ip6_calcmtu(struct ifnet *ifp, const struct in6_addr *dst, u_long rt_mtu, - u_long *mtup, int *alwaysfragp) + u_long *mtup, int *alwaysfragp, u_int proto) { u_long mtu = 0; int alwaysfrag = 0; @@ -1335,7 +1336,11 @@ ip6_calcmtu(struct ifnet *ifp, const struct in6_addr *dst, u_long rt_mtu, inc.inc6_faddr = *dst; ifmtu = IN6_LINKMTU(ifp); - mtu = tcp_hc_getmtu(&inc); + + /* TCP is known to react to pmtu changes so skip hc */ + if (proto != IPPROTO_TCP) + mtu = tcp_hc_getmtu(&inc); + if (mtu) mtu = min(mtu, rt_mtu); else |
