xnu-1699.32.7.tar.gz

[apple/xnu.git] / bsd / netinet6 / route6.c

diff --git a/bsd/netinet6/route6.c b/bsd/netinet6/route6.c
index 36617f2d0076b2a2491d1872b2605d12442e2e13..a0dc6c6a603decab6de889615a36868b2aa1a311 100644 (file)
--- a/bsd/netinet6/route6.c
+++ b/bsd/netinet6/route6.c
@@ -1,3 +1,31 @@
+/*
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
 /*     $FreeBSD: src/sys/netinet6/route6.c,v 1.1.2.3 2001/07/03 11:01:55 ume Exp $     */
 /*     $KAME: route6.c,v 1.24 2001/03/14 03:07:05 itojun Exp $ */
 
@@ -52,8 +80,9 @@ static int ip6_rthdr0(struct mbuf *, struct ip6_hdr *,
 #endif /* IP6_RTHDR0_ALLOWED */
 
 int
-route6_input(struct mbuf **mp, int *offp)
+route6_input(struct mbuf **mp, int *offp, int proto)
 {
+#pragma unused(proto)
        struct ip6_hdr *ip6;
        struct mbuf *m = *mp;
        struct ip6_rthdr *rh;
@@ -143,7 +172,7 @@ ip6_rthdr0(m, ip6, rh0)
        struct ip6_rthdr0 *rh0;
 {
        int addrs, index;
-       struct in6_addr *nextaddr, tmpaddr;
+       struct in6_addr *nextaddr, tmpaddr, ia6 = NULL;
        struct route_in6 ip6forward_rt;
 
        if (rh0->ip6r0_segleft == 0)
@@ -156,20 +185,20 @@ ip6_rthdr0(m, ip6, rh0)
                ) {
                /*
                 * Type 0 routing header can't contain more than 23 addresses.
-                * RFC 2462: this limitation was removed since stict/loose
+                * RFC 2462: this limitation was removed since strict/loose
                 * bitmap field was deleted.
                 */
                ip6stat.ip6s_badoptions++;
                icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
                            (caddr_t)&rh0->ip6r0_len - (caddr_t)ip6);
-               return(-1);
+               return (-1);
        }
 
        if ((addrs = rh0->ip6r0_len / 2) < rh0->ip6r0_segleft) {
                ip6stat.ip6s_badoptions++;
                icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
                            (caddr_t)&rh0->ip6r0_segleft - (caddr_t)ip6);
-               return(-1);
+               return (-1);
        }
 
        index = addrs - rh0->ip6r0_segleft;
@@ -188,7 +217,7 @@ ip6_rthdr0(m, ip6, rh0)
            IN6_IS_ADDR_V4COMPAT(nextaddr)) {
                ip6stat.ip6s_badoptions++;
                m_freem(m);
-               return(-1);
+               return (-1);
        }
        if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
            IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst) ||
@@ -196,16 +225,31 @@ ip6_rthdr0(m, ip6, rh0)
            IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
                ip6stat.ip6s_badoptions++;
                m_freem(m);
-               return(-1);
+               return (-1);
+       }
+
+       /*
+        * Determine the scope zone of the next hop, based on the interface
+        * of the current hop. [RFC4007, Section 9]
+        * Then disambiguate the scope zone for the next hop (if necessary).
+        */
+       if ((ia6 = ip6_getdstifaddr(m)) == NULL)
+               goto bad;
+       if (in6_setscope(nextaddr, ia6->ia_ifp, NULL) != 0) {
+               ip6stat.ip6s_badscope++;
+               IFA_REMREF(&ia6->ia_ifa);
+               ia6 = NULL;
+               goto bad;
        }
+       IFA_REMREF(&ia6->ia_ifa);
+       ia6 = NULL;
 
        /*
         * Swap the IPv6 destination address and nextaddr. Forward the packet.
         */
        tmpaddr = *nextaddr;
        *nextaddr = ip6->ip6_dst;
-       if (IN6_IS_ADDR_LINKLOCAL(nextaddr))
-               nextaddr->s6_addr16[1] = 0;
+       in6_clearscope(nextaddr); /* XXX */
        ip6->ip6_dst = tmpaddr;
        if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst))
                ip6->ip6_dst.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);