Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-ip6opts.c
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c8cf0f94
PA
1/*
2 * Copyright (C) 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
30#ifdef HAVE_CONFIG_H
31#include "config.h"
32#endif
33
34#ifndef lint
35static const char rcsid[] _U_ =
36 "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.17.2.1 2005/04/20 22:19:06 guy Exp $";
37#endif
38
39#ifdef INET6
40#include <tcpdump-stdinc.h>
41
42#include <stdio.h>
43
44#include "ip6.h"
45
46#include "interface.h"
47#include "addrtoname.h"
48#include "extract.h"
49
50/* items outside of rfc2292bis */
51#ifndef IP6OPT_MINLEN
52#define IP6OPT_MINLEN 2
53#endif
54#ifndef IP6OPT_RTALERT_LEN
55#define IP6OPT_RTALERT_LEN 4
56#endif
57#ifndef IP6OPT_JUMBO_LEN
58#define IP6OPT_JUMBO_LEN 6
59#endif
60#define IP6OPT_HOMEADDR_MINLEN 18
61#define IP6OPT_BU_MINLEN 10
62#define IP6OPT_BA_MINLEN 13
63#define IP6OPT_BR_MINLEN 2
64#define IP6SOPT_UI 0x2
65#define IP6SOPT_UI_MINLEN 4
66#define IP6SOPT_ALTCOA 0x3
67#define IP6SOPT_ALTCOA_MINLEN 18
68#define IP6SOPT_AUTH 0x4
69#define IP6SOPT_AUTH_MINLEN 6
70
71static void ip6_sopt_print(const u_char *, int);
72
73static void
74ip6_sopt_print(const u_char *bp, int len)
75{
76 int i;
77 int optlen;
78
79 for (i = 0; i < len; i += optlen) {
80 if (bp[i] == IP6OPT_PAD1)
81 optlen = 1;
82 else {
83 if (i + 1 < len)
84 optlen = bp[i + 1] + 2;
85 else
86 goto trunc;
87 }
88 if (i + optlen > len)
89 goto trunc;
90
91 switch (bp[i]) {
92 case IP6OPT_PAD1:
93 printf(", pad1");
94 break;
95 case IP6OPT_PADN:
96 if (len - i < IP6OPT_MINLEN) {
97 printf(", padn: trunc");
98 goto trunc;
99 }
100 printf(", padn");
101 break;
102 case IP6SOPT_UI:
103 if (len - i < IP6SOPT_UI_MINLEN) {
104 printf(", ui: trunc");
105 goto trunc;
106 }
107 printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
108 break;
109 case IP6SOPT_ALTCOA:
110 if (len - i < IP6SOPT_ALTCOA_MINLEN) {
111 printf(", altcoa: trunc");
112 goto trunc;
113 }
114 printf(", alt-CoA: %s", ip6addr_string(&bp[i+2]));
115 break;
116 case IP6SOPT_AUTH:
117 if (len - i < IP6SOPT_AUTH_MINLEN) {
118 printf(", auth: trunc");
119 goto trunc;
120 }
121 printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2]));
122 break;
123 default:
124 if (len - i < IP6OPT_MINLEN) {
125 printf(", sopt_type %d: trunc)", bp[i]);
126 goto trunc;
127 }
128 printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]);
129 break;
130 }
131 }
132 return;
133
134trunc:
135 printf("[trunc] ");
136}
137
138void
139ip6_opt_print(const u_char *bp, int len)
140{
141 int i;
142 int optlen = 0;
143
144 for (i = 0; i < len; i += optlen) {
145 if (bp[i] == IP6OPT_PAD1)
146 optlen = 1;
147 else {
148 if (i + 1 < len)
149 optlen = bp[i + 1] + 2;
150 else
151 goto trunc;
152 }
153 if (i + optlen > len)
154 goto trunc;
155
156 switch (bp[i]) {
157 case IP6OPT_PAD1:
158 printf("(pad1)");
159 break;
160 case IP6OPT_PADN:
161 if (len - i < IP6OPT_MINLEN) {
162 printf("(padn: trunc)");
163 goto trunc;
164 }
165 printf("(padn)");
166 break;
167 case IP6OPT_ROUTER_ALERT:
168 if (len - i < IP6OPT_RTALERT_LEN) {
169 printf("(rtalert: trunc)");
170 goto trunc;
171 }
172 if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
173 printf("(rtalert: invalid len %d)", bp[i + 1]);
174 goto trunc;
175 }
176 printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2]));
177 break;
178 case IP6OPT_JUMBO:
179 if (len - i < IP6OPT_JUMBO_LEN) {
180 printf("(jumbo: trunc)");
181 goto trunc;
182 }
183 if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
184 printf("(jumbo: invalid len %d)", bp[i + 1]);
185 goto trunc;
186 }
187 printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2]));
188 break;
189 case IP6OPT_HOME_ADDRESS:
190 if (len - i < IP6OPT_HOMEADDR_MINLEN) {
191 printf("(homeaddr: trunc)");
192 goto trunc;
193 }
194 if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
195 printf("(homeaddr: invalid len %d)", bp[i + 1]);
196 goto trunc;
197 }
198 printf("(homeaddr: %s", ip6addr_string(&bp[i + 2]));
199 if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
200 ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN],
201 (optlen - IP6OPT_HOMEADDR_MINLEN));
202 }
203 printf(")");
204 break;
205 case IP6OPT_BINDING_UPDATE:
206 if (len - i < IP6OPT_BU_MINLEN) {
207 printf("(bu: trunc)");
208 goto trunc;
209 }
210 if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) {
211 printf("(bu: invalid len %d)", bp[i + 1]);
212 goto trunc;
213 }
214 printf("(bu: ");
215 if (bp[i + 2] & 0x80)
216 printf("A");
217 if (bp[i + 2] & 0x40)
218 printf("H");
219 if (bp[i + 2] & 0x20)
220 printf("S");
221 if (bp[i + 2] & 0x10)
222 printf("D");
223 if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4])
224 printf("res");
225 printf(", sequence: %u", bp[i + 5]);
226 printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6]));
227
228 if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
229 ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN],
230 (optlen - IP6OPT_BU_MINLEN));
231 }
232 printf(")");
233 break;
234 case IP6OPT_BINDING_ACK:
235 if (len - i < IP6OPT_BA_MINLEN) {
236 printf("(ba: trunc)");
237 goto trunc;
238 }
239 if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) {
240 printf("(ba: invalid len %d)", bp[i + 1]);
241 goto trunc;
242 }
243 printf("(ba: ");
244 printf("status: %u", bp[i + 2]);
245 if (bp[i + 3])
246 printf("res");
247 printf(", sequence: %u", bp[i + 4]);
248 printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5]));
249 printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9]));
250
251 if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
252 ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
253 (optlen - IP6OPT_BA_MINLEN));
254 }
255 printf(")");
256 break;
257 case IP6OPT_BINDING_REQ:
258 if (len - i < IP6OPT_BR_MINLEN) {
259 printf("(br: trunc)");
260 goto trunc;
261 }
262 printf("(br");
263 if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) {
264 ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN],
265 (optlen - IP6OPT_BR_MINLEN));
266 }
267 printf(")");
268 break;
269 default:
270 if (len - i < IP6OPT_MINLEN) {
271 printf("(type %d: trunc)", bp[i]);
272 goto trunc;
273 }
274 printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
275 break;
276 }
277 }
278
279#if 0
280end:
281#endif
282 return;
283
284trunc:
285 printf("[trunc] ");
286}
287
288int
289hbhopt_print(register const u_char *bp)
290{
291 const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
292 int hbhlen = 0;
293
294 TCHECK(dp->ip6h_len);
295 hbhlen = (int)((dp->ip6h_len + 1) << 3);
296 TCHECK2(*dp, hbhlen);
297 printf("HBH ");
298 if (vflag)
299 ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
300
301 return(hbhlen);
302
303 trunc:
304 fputs("[|HBH]", stdout);
305 return(-1);
306}
307
308int
309dstopt_print(register const u_char *bp)
310{
311 const struct ip6_dest *dp = (struct ip6_dest *)bp;
312 int dstoptlen = 0;
313
314 TCHECK(dp->ip6d_len);
315 dstoptlen = (int)((dp->ip6d_len + 1) << 3);
316 TCHECK2(*dp, dstoptlen);
317 printf("DSTOPT ");
318 if (vflag) {
319 ip6_opt_print((const u_char *)dp + sizeof(*dp),
320 dstoptlen - sizeof(*dp));
321 }
322
323 return(dstoptlen);
324
325 trunc:
326 fputs("[|DSTOPT]", stdout);
327 return(-1);
328}
329#endif /* INET6 */