2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * $KAME: route6.c,v 1.24 2001/03/14 03:07:05 itojun Exp $
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 #include "opt_inet6.h"
38 #include <sys/param.h>
40 #include <sys/socket.h>
41 #include <sys/systm.h>
42 #include <sys/queue.h>
45 #include <net/if_var.h>
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>
53 #include <netinet/icmp6.h>
60 route6_input(struct mbuf **mp, int *offp, int proto)
65 int off = *offp, rhlen;
69 ip6a = ip6_findaux(m);
71 /* XXX reject home-address option before rthdr */
72 if (ip6a->ip6a_flags & IP6A_SWAP) {
73 IP6STAT_INC(ip6s_badoptions);
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);
85 ip6 = mtod(m, struct ip6_hdr *);
86 IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, sizeof(*rh));
88 IP6STAT_INC(ip6s_tooshort);
94 * While this switch may look gratuitous, leave it in
95 * in favour of RH2 implementations, etc.
97 switch (rh->ip6r_type) {
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. */
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);
111 return (rh->ip6r_nxt);