1/*
2 * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29/*
30 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. Neither the name of the project nor the names of its contributors
42 * may be used to endorse or promote products derived from this software
43 * without specific prior written permission.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 */
57
58#include <sys/param.h>
59#include <sys/mcache.h>
60#include <sys/mbuf.h>
61#include <sys/socket.h>
62#include <sys/queue.h>
63#include <kern/debug.h>
64#include <string.h>
65
66#include <net/if.h>
67#include <net/route.h>
68
69#include <netinet/in.h>
70#include <netinet6/in6_var.h>
71#include <netinet/ip6.h>
72#include <netinet6/ip6_var.h>
73
74#include <netinet/icmp6.h>
75
76int
77route6_input(struct mbuf **mp, int *offp, int proto)
78{
79#pragma unused(proto)
80 struct ip6_hdr *ip6 = NULL;
81 struct mbuf *m = *mp;
82 struct ip6_rthdr *rh = NULL;
83 int off = *offp, rhlen = 0;
84#ifdef notyet
85 struct ip6aux *ip6a = NULL;
86
87 ip6a = ip6_findaux(m);
88 if (ip6a) {
89 /* XXX reject home-address option before rthdr */
90 if (ip6a->ip6a_flags & IP6A_SWAP) {
91 ip6stat.ip6s_badoptions++;
92 *mp = NULL;
93 m_freem(m);
94 return IPPROTO_DONE;
95 }
96 }
97 ip6a = NULL;
98#endif /* notyet */
99
100 IP6_EXTHDR_CHECK(m, off, sizeof(*rh), return IPPROTO_DONE);
101
102 /* Expect 32-bit aligned data pointer on strict-align platforms */
103 MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
104
105 ip6 = mtod(m, struct ip6_hdr *);
106 rh = (struct ip6_rthdr *)((caddr_t)ip6 + off);
107
108 switch (rh->ip6r_type) {
109 default:
110 /* unknown routing type */
111 if (rh->ip6r_segleft == 0) {
112 rhlen = (rh->ip6r_len + 1) << 3;
113 break; /* Final dst. Just ignore the header. */
114 }
115 ip6stat.ip6s_badoptions++;
116 icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
117 (int)((caddr_t)&rh->ip6r_type - (caddr_t)ip6));
118 return IPPROTO_DONE;
119 }
120
121 *mp = m;
122 *offp += rhlen;
123 return rh->ip6r_nxt;
124}
125