diff options
| author | Niels Provos <provos@cvs.openbsd.org> | 2001-06-24 18:24:57 +0000 |
|---|---|---|
| committer | Niels Provos <provos@cvs.openbsd.org> | 2001-06-24 18:24:57 +0000 |
| commit | 1802eb31361146b275e2cc0c1df827ef6e5017dd (patch) | |
| tree | 5ea48e1851f9b90ab6bc9229dd96757e9ea06973 /sys/netinet | |
| parent | 5f5b91c91878db9c72c3701723d41f1f0984c558 (diff) | |
take mtu from routing table
Diffstat (limited to 'sys/netinet')
| -rw-r--r-- | sys/netinet/ip_input.c | 63 |
1 files changed, 13 insertions, 50 deletions
diff --git a/sys/netinet/ip_input.c b/sys/netinet/ip_input.c index 702542d25cf..78a1e5d2a97 100644 --- a/sys/netinet/ip_input.c +++ b/sys/netinet/ip_input.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ip_input.c,v 1.82 2001/06/23 18:54:44 angelos Exp $ */ +/* $OpenBSD: ip_input.c,v 1.83 2001/06/24 18:24:56 provos Exp $ */ /* $NetBSD: ip_input.c,v 1.30 1996/03/16 23:53:58 christos Exp $ */ /* @@ -1364,9 +1364,7 @@ ip_forward(m, srcrt) struct mbuf *mcopy; n_long dest; struct ifnet *destifp; -#if 0 /*KAME IPSEC*/ struct ifnet dummyifp; -#endif dest = 0; #ifdef DIAGNOSTIC @@ -1485,54 +1483,19 @@ ip_forward(m, srcrt) case EMSGSIZE: type = ICMP_UNREACH; code = ICMP_UNREACH_NEEDFRAG; -#if 1 /*KAME IPSEC*/ - if (ipforward_rt.ro_rt) - destifp = ipforward_rt.ro_rt->rt_ifp; -#else - /* - * If the packet is routed over IPsec tunnel, tell the - * originator the tunnel MTU. - * tunnel MTU = if MTU - sizeof(IP) - ESP/AH hdrsiz - * XXX quickhack!!! - */ - if (ipforward_rt.ro_rt) { - struct secpolicy *sp; - int ipsecerror; - int ipsechdr; - struct route *ro; - - sp = ipsec4_getpolicybyaddr(mcopy, - IP_FORWARDING, - &ipsecerror); - - if (sp == NULL) - destifp = ipforward_rt.ro_rt->rt_ifp; - else { - /* count IPsec header size */ - ipsechdr = ipsec4_hdrsiz(mcopy, NULL); - /* - * find the correct route for outer IPv4 - * header, compute tunnel MTU. - * - * XXX BUG ALERT - * The "dummyifp" code relies upon the fact - * that icmp_error() touches only ifp->if_mtu. - */ - /*XXX*/ - destifp = NULL; - if (sp->req != NULL - && sp->req->sa != NULL) { - ro = &sp->req->sa->saidx->sa_route; - if (ro->ro_rt && ro->ro_rt->rt_ifp) { - dummyifp.if_mtu = - ro->ro_rt->rt_ifp->if_mtu; - dummyifp.if_mtu -= ipsechdr; - destifp = &dummyifp; - } - } - - key_freesp(sp); +#ifdef IPSEC + if (ipforward_rt.ro_rt) { + struct rtentry *rt = ipforward_rt.ro_rt; + destifp = ipforward_rt.ro_rt->rt_ifp; + /* + * XXX BUG ALERT + * The "dummyifp" code relies upon the fact + * that icmp_error() touches only ifp->if_mtu. + */ + if (rt->rt_rmx.rmx_mtu) { + dummyifp.if_mtu = rt->rt_rmx.rmx_mtu; + destifp = &dummyifp; } } #endif /*IPSEC*/ |