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 | |
76 | int |
77 | route6_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 | |