| 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
|
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.
| 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
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.
|
28 *
29 * $FreeBSD: head/sys/netinet6/dest6.c 59760 2000-04-29 15:36:14Z phk $
| |
30 */
31
| 31 */
32
|
| 33#include "opt_inet.h"
34#include "opt_inet6.h"
35
|
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/mbuf.h>
35#include <sys/domain.h>
36#include <sys/protosw.h>
37#include <sys/socket.h>
38#include <sys/errno.h>
39#include <sys/time.h>
40
41#include <net/if.h>
42#include <net/route.h>
43
44#include <netinet/in.h>
45#include <netinet/in_var.h>
| 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>
|
46#include <netinet6/ip6.h>
| 50#include
|
47#include <netinet6/ip6_var.h>
| 51#include <netinet6/ip6_var.h>
|
48#include <netinet6/icmp6.h>
| 52#include
|
49
50/*
51 * Destination options header processing.
52 */
53int
54dest6_input(mp, offp, proto)
55 struct mbuf **mp;
56 int *offp, proto;
57{
58 register struct mbuf *m = *mp;
59 int off = *offp, dstoptlen, optlen;
60 struct ip6_dest *dstopts;
61 u_int8_t *opt;
62
63 /* validation of the length of the header */
| 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
|
64 IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), IPPROTO_DONE);
65 dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
| 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
|
66 dstoptlen = (dstopts->ip6d_len + 1) << 3;
67
| 76 dstoptlen = (dstopts->ip6d_len + 1) << 3;
77
|
| 78#ifndef PULLDOWN_TEST
|
68 IP6_EXTHDR_CHECK(m, off, dstoptlen, IPPROTO_DONE);
69 dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
| 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
|
70 off += dstoptlen;
71 dstoptlen -= sizeof(struct ip6_dest);
72 opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
73
74 /* search header for all options. */
75 for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
76 switch(*opt) {
77 case IP6OPT_PAD1:
78 optlen = 1;
79 break;
80 case IP6OPT_PADN:
81 if (dstoptlen < IP6OPT_MINLEN) {
82 ip6stat.ip6s_toosmall++;
83 goto bad;
84 }
85 optlen = *(opt + 1) + 2;
86 break;
87 default: /* unknown option */
88 if (dstoptlen < IP6OPT_MINLEN) {
89 ip6stat.ip6s_toosmall++;
90 goto bad;
91 }
92 if ((optlen = ip6_unknown_opt(opt, m,
93 opt-mtod(m, u_int8_t *))) == -1)
94 return(IPPROTO_DONE);
95 optlen += 2;
96 break;
97 }
98 }
99
100 *offp = off;
101 return(dstopts->ip6d_nxt);
102
103 bad:
104 m_freem(m);
105 return(IPPROTO_DONE);
106}
| 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:
94 optlen = 1;
95 break;
96 case IP6OPT_PADN:
97 if (dstoptlen < IP6OPT_MINLEN) {
98 ip6stat.ip6s_toosmall++;
99 goto bad;
100 }
101 optlen = *(opt + 1) + 2;
102 break;
103 default: /* unknown option */
104 if (dstoptlen < IP6OPT_MINLEN) {
105 ip6stat.ip6s_toosmall++;
106 goto bad;
107 }
108 if ((optlen = ip6_unknown_opt(opt, m,
109 opt-mtod(m, u_int8_t *))) == -1)
110 return(IPPROTO_DONE);
111 optlen += 2;
112 break;
113 }
114 }
115
116 *offp = off;
117 return(dstopts->ip6d_nxt);
118
119 bad:
120 m_freem(m);
121 return(IPPROTO_DONE);
122}
|