FreeBSD/Linux Kernel Cross Reference
sys/netinet6/route6.c
1 /*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $KAME: route6.c,v 1.24 2001/03/14 03:07:05 itojun Exp $
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: releng/11.2/sys/netinet6/route6.c 331722 2018-03-29 02:50:57Z eadler $");
34
35 #include "opt_inet.h"
36 #include "opt_inet6.h"
37
38 #include <sys/param.h>
39 #include <sys/mbuf.h>
40 #include <sys/socket.h>
41 #include <sys/systm.h>
42 #include <sys/queue.h>
43
44 #include <net/if.h>
45 #include <net/if_var.h>
46
47 #include <netinet/in.h>
48 #include <netinet6/in6_var.h>
49 #include <netinet/ip6.h>
50 #include <netinet6/ip6_var.h>
51 #include <netinet6/scope6_var.h>
52
53 #include <netinet/icmp6.h>
54
55 /*
56 * proto - is unused
57 */
58
59 int
60 route6_input(struct mbuf **mp, int *offp, int proto)
61 {
62 struct ip6_hdr *ip6;
63 struct mbuf *m = *mp;
64 struct ip6_rthdr *rh;
65 int off = *offp, rhlen;
66 #ifdef __notyet__
67 struct ip6aux *ip6a;
68
69 ip6a = ip6_findaux(m);
70 if (ip6a) {
71 /* XXX reject home-address option before rthdr */
72 if (ip6a->ip6a_flags & IP6A_SWAP) {
73 IP6STAT_INC(ip6s_badoptions);
74 m_freem(m);
75 return IPPROTO_DONE;
76 }
77 }
78 #endif
79
80 #ifndef PULLDOWN_TEST
81 IP6_EXTHDR_CHECK(m, off, sizeof(*rh), IPPROTO_DONE);
82 ip6 = mtod(m, struct ip6_hdr *);
83 rh = (struct ip6_rthdr *)((caddr_t)ip6 + off);
84 #else
85 ip6 = mtod(m, struct ip6_hdr *);
86 IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, sizeof(*rh));
87 if (rh == NULL) {
88 IP6STAT_INC(ip6s_tooshort);
89 return IPPROTO_DONE;
90 }
91 #endif
92
93 /*
94 * While this switch may look gratuitous, leave it in
95 * in favour of RH2 implementations, etc.
96 */
97 switch (rh->ip6r_type) {
98 default:
99 /* Unknown routing header type. */
100 if (rh->ip6r_segleft == 0) {
101 rhlen = (rh->ip6r_len + 1) << 3;
102 break; /* Final dst. Just ignore the header. */
103 }
104 IP6STAT_INC(ip6s_badoptions);
105 icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
106 (caddr_t)&rh->ip6r_type - (caddr_t)ip6);
107 return (IPPROTO_DONE);
108 }
109
110 *offp += rhlen;
111 return (rh->ip6r_nxt);
112 }
Cache object: e9641f2974cefd26b7925c801ff0165d
|