libc - Check for invalid context in setcontext() and swapcontext()
[dragonfly.git] / sys / netinet6 / route6.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/netinet6/route6.c,v 1.1.2.5 2003/01/23 21:06:47 sam Exp $ */
5aa41e7c 2/* $DragonFly: src/sys/netinet6/route6.c,v 1.10 2008/09/04 09:08:22 hasso Exp $ */
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3/* $KAME: route6.c,v 1.24 2001/03/14 03:07:05 itojun Exp $ */
4
5/*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "opt_inet.h"
35#include "opt_inet6.h"
36
37#include <sys/param.h>
38#include <sys/mbuf.h>
39#include <sys/socket.h>
40#include <sys/systm.h>
41#include <sys/queue.h>
42
43#include <net/if.h>
44
45#include <netinet/in.h>
46#include <netinet6/in6_var.h>
47#include <netinet/ip6.h>
48#include <netinet6/ip6_var.h>
49
50#include <netinet/icmp6.h>
51
984263bc 52int
122ebd49 53route6_input(struct mbuf **mp, int *offp, int proto) /* proto is unused */
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54{
55 struct ip6_hdr *ip6;
56 struct mbuf *m = *mp;
57 struct ip6_rthdr *rh;
58 int off = *offp, rhlen;
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59
60#ifndef PULLDOWN_TEST
61 IP6_EXTHDR_CHECK(m, off, sizeof(*rh), IPPROTO_DONE);
62 ip6 = mtod(m, struct ip6_hdr *);
63 rh = (struct ip6_rthdr *)((caddr_t)ip6 + off);
64#else
65 ip6 = mtod(m, struct ip6_hdr *);
66 IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, sizeof(*rh));
67 if (rh == NULL) {
68 ip6stat.ip6s_tooshort++;
69 return IPPROTO_DONE;
70 }
71#endif
72
73 switch (rh->ip6r_type) {
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74 default:
75 /* unknown routing type */
76 if (rh->ip6r_segleft == 0) {
77 rhlen = (rh->ip6r_len + 1) << 3;
78 break; /* Final dst. Just ignore the header. */
79 }
80 ip6stat.ip6s_badoptions++;
81 icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
82 (caddr_t)&rh->ip6r_type - (caddr_t)ip6);
bde3511a 83 return (IPPROTO_DONE);
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84 }
85
86 *offp += rhlen;
bde3511a 87 return (rh->ip6r_nxt);
984263bc 88}