1/* $FreeBSD: head/sys/netinet6/dest6.c 62587 2000-07-04 16:35:15Z itojun $ */
2/* $KAME: dest6.c,v 1.12 2000/05/05 11:00:57 sumikawa Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright

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23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include "opt_inet.h"
34#include "opt_inet6.h"
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/mbuf.h>
39#include <sys/domain.h>
40#include <sys/protosw.h>
41#include <sys/socket.h>
42#include <sys/errno.h>
43#include <sys/time.h>
44
45#include <net/if.h>
46#include <net/route.h>
47
48#include <netinet/in.h>
49#include <netinet/in_var.h>
50#include
51#include <netinet6/ip6_var.h>
52#include
53
54/*
55 * Destination options header processing.
56 */
57int
58dest6_input(mp, offp, proto)
59 struct mbuf **mp;
60 int *offp, proto;
61{
62 register struct mbuf *m = *mp;
63 int off = *offp, dstoptlen, optlen;
64 struct ip6_dest *dstopts;
65 u_int8_t *opt;
66
67 /* validation of the length of the header */
68#ifndef PULLDOWN_TEST
69 IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), IPPROTO_DONE);
70 dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
71#else
72 IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, sizeof(*dstopts));
73 if (dstopts == NULL)
74 return IPPROTO_DONE;
75#endif
76 dstoptlen = (dstopts->ip6d_len + 1) << 3;
77
78#ifndef PULLDOWN_TEST
79 IP6_EXTHDR_CHECK(m, off, dstoptlen, IPPROTO_DONE);
80 dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
81#else
82 IP6_EXTHDR_GET(dstopts, struct ip6_dest *, m, off, dstoptlen);
83 if (dstopts == NULL)
84 return IPPROTO_DONE;
85#endif
86 off += dstoptlen;
87 dstoptlen -= sizeof(struct ip6_dest);
88 opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
89
90 /* search header for all options. */
91 for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
92 switch(*opt) {
93 case IP6OPT_PAD1:

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