/*
- * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2020 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
* 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,
* 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 $ */
-
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*/
#include <sys/param.h>
+#include <sys/mcache.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 <netinet/icmp6.h>
-#if IP6_RTHDR0_ALLOWED
-static int ip6_rthdr0(struct mbuf *, struct ip6_hdr *,
- struct ip6_rthdr0 *);
-#endif /* IP6_RTHDR0_ALLOWED */
-
int
route6_input(struct mbuf **mp, int *offp, int proto)
{
#pragma unused(proto)
- struct ip6_hdr *ip6;
+ struct ip6_hdr *ip6 = NULL;
struct mbuf *m = *mp;
- struct ip6_rthdr *rh;
- int off = *offp, rhlen;
- struct ip6aux *ip6a;
+ struct ip6_rthdr *rh = NULL;
+ int off = *offp, rhlen = 0;
+#ifdef notyet
+ struct ip6aux *ip6a = NULL;
ip6a = ip6_findaux(m);
if (ip6a) {
/* XXX reject home-address option before rthdr */
if (ip6a->ip6a_flags & IP6A_SWAP) {
ip6stat.ip6s_badoptions++;
+ *mp = NULL;
m_freem(m);
return IPPROTO_DONE;
}
}
+ ip6a = NULL;
+#endif /* notyet */
-#ifndef PULLDOWN_TEST
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);
-#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) {
-#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;
- 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,
- (caddr_t)&rh->ip6r_type - (caddr_t)ip6);
- return(IPPROTO_DONE);
+ (int)((caddr_t)&rh->ip6r_type - (caddr_t)ip6));
+ return IPPROTO_DONE;
}
+ *mp = m;
*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, ia6 = NULL;
- struct route_in6 ip6forward_rt;
-
- 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 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);
- }
-
- 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);
- }
-
- /*
- * 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;
- 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);
-
- /*
- * Don't use the globally cached route to forward packet having
- * Type 0 routing header(s); instead, do an explicit lookup using
- * a local route entry variable, in case the next address in the
- * packet is bogus (which would otherwise unnecessarily invalidate
- * the globally cached route).
- */
- bzero(&ip6forward_rt, sizeof (ip6forward_rt));
-
-#if COMPAT_RFC1883
- if (rh0->ip6r0_slmap[index / 8] & (1 << (7 - (index % 8))))
- ip6_forward(m, &ip6forward_rt, IPV6_SRCRT_NEIGHBOR, 0);
- else
- ip6_forward(m, &ip6forward_rt, IPV6_SRCRT_NOTNEIGHBOR, 0);
-#else
- ip6_forward(m, &ip6forward_rt, 1, 0);
-#endif
-
- /* Release reference to the looked up route */
- if (ip6forward_rt.ro_rt != NULL) {
- rtfree(ip6forward_rt.ro_rt);
- ip6forward_rt.ro_rt = NULL;
- }
-
- return(-1); /* m would be freed in ip6_forward() */
+ return rh->ip6r_nxt;
}
-#endif /* IP6_RTHDR0_ALLOWED */
-
projects / apple / xnu.git / blobdiff