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125 lines
4.3 KiB
C
125 lines
4.3 KiB
C
/*
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* Copyright (c) 2000-2020 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/mcache.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/queue.h>
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#include <kern/debug.h>
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#include <string.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet6/in6_var.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet/icmp6.h>
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int
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route6_input(struct mbuf **mp, int *offp, int proto)
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{
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#pragma unused(proto)
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struct ip6_hdr *ip6 = NULL;
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struct mbuf *m = *mp;
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struct ip6_rthdr *rh = NULL;
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int off = *offp, rhlen = 0;
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#ifdef notyet
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struct ip6aux *ip6a = NULL;
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ip6a = ip6_findaux(m);
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if (ip6a) {
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/* XXX reject home-address option before rthdr */
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if (ip6a->ip6a_flags & IP6A_SWAP) {
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ip6stat.ip6s_badoptions++;
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*mp = NULL;
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m_freem(m);
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return IPPROTO_DONE;
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}
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}
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ip6a = NULL;
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#endif /* notyet */
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IP6_EXTHDR_CHECK(m, off, sizeof(*rh), return IPPROTO_DONE);
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/* Expect 32-bit aligned data pointer on strict-align platforms */
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MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
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ip6 = mtod(m, struct ip6_hdr *);
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rh = (struct ip6_rthdr *)((caddr_t)ip6 + off);
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switch (rh->ip6r_type) {
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default:
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/* unknown routing type */
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if (rh->ip6r_segleft == 0) {
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rhlen = (rh->ip6r_len + 1) << 3;
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break; /* Final dst. Just ignore the header. */
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}
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ip6stat.ip6s_badoptions++;
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icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
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(int)((caddr_t)&rh->ip6r_type - (caddr_t)ip6));
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return IPPROTO_DONE;
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}
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*mp = m;
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*offp += rhlen;
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return rh->ip6r_nxt;
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}
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