xnu-4903.270.47.tar.gz

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

diff --git a/bsd/netinet6/route6.c b/bsd/netinet6/route6.c
index a0516af415b2f41936ba9205ff6f6bc9d00b7281..cc0886d44464222ddd3180855aa055f858db553a 100644 (file)
--- a/bsd/netinet6/route6.c
+++ b/bsd/netinet6/route6.c
@@ -1,5 +1,30 @@
-/*     $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 $ */
+/*
+ * Copyright (c) 2000-2013 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@
+ */

 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.


@@ -31,11 +56,15 @@
  */
 
 #include <sys/param.h>
  */
 
 #include <sys/param.h>

+#include <sys/mcache.h>

 #include <sys/mbuf.h>
 #include <sys/socket.h>
 #include <sys/queue.h>
 #include <sys/mbuf.h>
 #include <sys/socket.h>
 #include <sys/queue.h>

+#include <kern/debug.h>
+#include <string.h>

 
 #include <net/if.h>
 
 #include <net/if.h>

+#include <net/route.h>

 
 #include <netinet/in.h>
 #include <netinet6/in6_var.h>
 
 #include <netinet/in.h>
 #include <netinet6/in6_var.h>


@@ -44,25 +73,19 @@
 
 #include <netinet/icmp6.h>
 
 
 #include <netinet/icmp6.h>
 

-#if IP6_RTHDR0_ALLOWED
-static int ip6_rthdr0(struct mbuf *, struct ip6_hdr *,
-    struct ip6_rthdr0 *);
-#endif /* IP6_RTHDR0_ALLOWED */
-

 int
 int

-route6_input(mp, offp)
-       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;
        int off = *offp, rhlen;
        struct ip6_hdr *ip6;
        struct mbuf *m = *mp;
        struct ip6_rthdr *rh;
        int off = *offp, rhlen;

-       struct mbuf *n;
+#ifdef notyet
+       struct ip6aux *ip6a;

 
 

-       n = ip6_findaux(m);
-       if (n) {
-               struct ip6aux *ip6a = mtod(n, struct ip6aux *);
+       ip6a = ip6_findaux(m);
+       if (ip6a) {

                /* XXX reject home-address option before rthdr */
                if (ip6a->ip6a_flags & IP6A_SWAP) {
                        ip6stat.ip6s_badoptions++;
                /* XXX reject home-address option before rthdr */
                if (ip6a->ip6a_flags & IP6A_SWAP) {
                        ip6stat.ip6s_badoptions++;


@@ -70,155 +93,29 @@ route6_input(mp, offp)
                        return IPPROTO_DONE;
                }
        }
                        return IPPROTO_DONE;
                }
        }

+#endif /* notyet */

 
 

-#ifndef PULLDOWN_TEST

        IP6_EXTHDR_CHECK(m, off, sizeof(*rh), return IPPROTO_DONE);
        IP6_EXTHDR_CHECK(m, off, sizeof(*rh), return IPPROTO_DONE);

+
+       /* Expect 32-bit aligned data pointer on strict-align platforms */
+       MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+

        ip6 = mtod(m, struct ip6_hdr *);
        rh = (struct ip6_rthdr *)((caddr_t)ip6 + off);
        ip6 = mtod(m, struct ip6_hdr *);
        rh = (struct ip6_rthdr *)((caddr_t)ip6 + off);

-#else
-       ip6 = mtod(m, struct ip6_hdr *);
-       IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, sizeof(*rh));
-       if (rh == NULL) {
-               ip6stat.ip6s_tooshort++;
-               return IPPROTO_DONE;
-       }
-#endif

 
        switch (rh->ip6r_type) {
 
        switch (rh->ip6r_type) {

-#if IP6_RTHDR0_ALLOWED
-       case IPV6_RTHDR_TYPE_0:
-               rhlen = (rh->ip6r_len + 1) << 3;
-#ifndef PULLDOWN_TEST
-               /*
-                * note on option length:
-                * due to IP6_EXTHDR_CHECK assumption, we cannot handle
-                * very big routing header (max rhlen == 2048).
-                */
-               IP6_EXTHDR_CHECK(m, off, rhlen, return IPPROTO_DONE);
-#else
-               /*
-                * note on option length:
-                * maximum rhlen: 2048
-                * max mbuf m_pulldown can handle: MCLBYTES == usually 2048
-                * so, here we are assuming that m_pulldown can handle
-                * rhlen == 2048 case.  this may not be a good thing to
-                * assume - we may want to avoid pulling it up altogether.
-                */
-               IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, rhlen);
-               if (rh == NULL) {
-                       ip6stat.ip6s_tooshort++;
-                       return IPPROTO_DONE;
-               }
-#endif
-               if (ip6_rthdr0(m, ip6, (struct ip6_rthdr0 *)rh))
-                       return(IPPROTO_DONE);
-               break;
-#endif /* IP6_RTHDR0_ALLOWED */

        default:
                /* unknown routing type */
                if (rh->ip6r_segleft == 0) {
                        rhlen = (rh->ip6r_len + 1) << 3;
        default:
                /* unknown routing type */
                if (rh->ip6r_segleft == 0) {
                        rhlen = (rh->ip6r_len + 1) << 3;

-                       break;  /* Final dst. Just ignore the header. */
+                       break;  /* Final dst. Just ignore the header. */

                }
                ip6stat.ip6s_badoptions++;
                icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
                }
                ip6stat.ip6s_badoptions++;
                icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,

-                           (caddr_t)&rh->ip6r_type - (caddr_t)ip6);
-               return(IPPROTO_DONE);
+                   (caddr_t)&rh->ip6r_type - (caddr_t)ip6);
+               return IPPROTO_DONE;

        }
 
        *offp += rhlen;
        }
 
        *offp += rhlen;

-       return(rh->ip6r_nxt);
-}
-
-#if IP6_RTHDR0_ALLOWED
-/*
- * Type0 routing header processing
- *
- * RFC2292 backward compatibility warning: no support for strict/loose bitmap,
- * as it was dropped between RFC1883 and RFC2460.
- */
-static int
-ip6_rthdr0(m, ip6, rh0)
-       struct mbuf *m;
-       struct ip6_hdr *ip6;
-       struct ip6_rthdr0 *rh0;
-{
-       int addrs, index;
-       struct in6_addr *nextaddr, tmpaddr;
-
-       if (rh0->ip6r0_segleft == 0)
-               return(0);
-
-       if (rh0->ip6r0_len % 2
-#if COMPAT_RFC1883
-           || rh0->ip6r0_len > 46
-#endif
-               ) {
-               /*
-                * Type 0 routing header can't contain more than 23 addresses.
-                * RFC 2462: this limitation was removed since stict/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);
-       }
-
-       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);
-       }
-
-       index = addrs - rh0->ip6r0_segleft;
-       rh0->ip6r0_segleft--;
-       /* note that ip6r0_addr does not exist in RFC2292bis */
-       nextaddr = rh0->ip6r0_addr + index;
-
-       /*
-        * reject invalid addresses.  be proactive about malicious use of
-        * IPv4 mapped/compat address.
-        * XXX need more checks?
-        */
-       if (IN6_IS_ADDR_MULTICAST(nextaddr) ||
-           IN6_IS_ADDR_UNSPECIFIED(nextaddr) ||
-           IN6_IS_ADDR_V4MAPPED(nextaddr) ||
-           IN6_IS_ADDR_V4COMPAT(nextaddr)) {
-               ip6stat.ip6s_badoptions++;
-               m_freem(m);
-               return(-1);
-       }
-       if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
-           IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst) ||
-           IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst) ||
-           IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
-               ip6stat.ip6s_badoptions++;
-               m_freem(m);
-               return(-1);
-       }
-
-       /*
-        * 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;
-       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);
-
-#if COMPAT_RFC1883
-       if (rh0->ip6r0_slmap[index / 8] & (1 << (7 - (index % 8))))
-               ip6_forward(m, IPV6_SRCRT_NEIGHBOR, 0);
-       else
-               ip6_forward(m, IPV6_SRCRT_NOTNEIGHBOR, 0);
-#else
-       ip6_forward(m, 1, 0);
-#endif
-
-       return(-1);                     /* m would be freed in ip6_forward() */
+       return rh->ip6r_nxt;

 }
 }

-#endif /* IP6_RTHDR0_ALLOWED */