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Update the ND_LCHECK*() macros to ND_ICHECK*() macros
[tcpdump] / print-aodv.c
1 /*
2 * Copyright (c) 2003 Bruce M. Simpson <bms@spc.org>
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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bruce M. Simpson.
16 * 4. Neither the name of Bruce M. Simpson nor the names of co-
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bruce M. Simpson AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Bruce M. Simpson OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /* \summary: Ad hoc On-Demand Distance Vector (AODV) Routing printer */
34 /* specification: RFC 3561 */
35
36 #ifdef HAVE_CONFIG_H
37 #include <config.h>
38 #endif
39
40 #include "netdissect-stdinc.h"
41
42 #include "netdissect.h"
43 #include "addrtoname.h"
44 #include "extract.h"
45
46 struct aodv_rreq {
47 nd_uint8_t rreq_type; /* AODV message type (1) */
48 nd_uint8_t rreq_flags; /* various flags */
49 nd_uint8_t rreq_zero0; /* reserved, set to zero */
50 nd_uint8_t rreq_hops; /* number of hops from originator */
51 nd_uint32_t rreq_id; /* request ID */
52 nd_ipv4 rreq_da; /* destination IPv4 address */
53 nd_uint32_t rreq_ds; /* destination sequence number */
54 nd_ipv4 rreq_oa; /* originator IPv4 address */
55 nd_uint32_t rreq_os; /* originator sequence number */
56 };
57 struct aodv_rreq6 {
58 nd_uint8_t rreq_type; /* AODV message type (1) */
59 nd_uint8_t rreq_flags; /* various flags */
60 nd_uint8_t rreq_zero0; /* reserved, set to zero */
61 nd_uint8_t rreq_hops; /* number of hops from originator */
62 nd_uint32_t rreq_id; /* request ID */
63 nd_ipv6 rreq_da; /* destination IPv6 address */
64 nd_uint32_t rreq_ds; /* destination sequence number */
65 nd_ipv6 rreq_oa; /* originator IPv6 address */
66 nd_uint32_t rreq_os; /* originator sequence number */
67 };
68
69 #define RREQ_JOIN 0x80 /* join (reserved for multicast */
70 #define RREQ_REPAIR 0x40 /* repair (reserved for multicast */
71 #define RREQ_GRAT 0x20 /* gratuitous RREP */
72 #define RREQ_DEST 0x10 /* destination only */
73 #define RREQ_UNKNOWN 0x08 /* unknown destination sequence num */
74 #define RREQ_FLAGS_MASK 0xF8 /* mask for rreq_flags */
75
76 struct aodv_rrep {
77 nd_uint8_t rrep_type; /* AODV message type (2) */
78 nd_uint8_t rrep_flags; /* various flags */
79 nd_uint8_t rrep_ps; /* prefix size */
80 nd_uint8_t rrep_hops; /* number of hops from o to d */
81 nd_ipv4 rrep_da; /* destination IPv4 address */
82 nd_uint32_t rrep_ds; /* destination sequence number */
83 nd_ipv4 rrep_oa; /* originator IPv4 address */
84 nd_uint32_t rrep_life; /* lifetime of this route */
85 };
86 struct aodv_rrep6 {
87 nd_uint8_t rrep_type; /* AODV message type (2) */
88 nd_uint8_t rrep_flags; /* various flags */
89 nd_uint8_t rrep_ps; /* prefix size */
90 nd_uint8_t rrep_hops; /* number of hops from o to d */
91 nd_ipv6 rrep_da; /* destination IPv6 address */
92 nd_uint32_t rrep_ds; /* destination sequence number */
93 nd_ipv6 rrep_oa; /* originator IPv6 address */
94 nd_uint32_t rrep_life; /* lifetime of this route */
95 };
96
97 #define RREP_REPAIR 0x80 /* repair (reserved for multicast */
98 #define RREP_ACK 0x40 /* acknowledgement required */
99 #define RREP_FLAGS_MASK 0xC0 /* mask for rrep_flags */
100 #define RREP_PREFIX_MASK 0x1F /* mask for prefix size */
101
102 struct rerr_unreach {
103 nd_ipv4 u_da; /* IPv4 address */
104 nd_uint32_t u_ds; /* sequence number */
105 };
106 struct rerr_unreach6 {
107 nd_ipv6 u_da; /* IPv6 address */
108 nd_uint32_t u_ds; /* sequence number */
109 };
110
111 struct aodv_rerr {
112 nd_uint8_t rerr_type; /* AODV message type (3 or 18) */
113 nd_uint8_t rerr_flags; /* various flags */
114 nd_uint8_t rerr_zero0; /* reserved, set to zero */
115 nd_uint8_t rerr_dc; /* destination count */
116 };
117
118 #define RERR_NODELETE 0x80 /* don't delete the link */
119 #define RERR_FLAGS_MASK 0x80 /* mask for rerr_flags */
120
121 struct aodv_rrep_ack {
122 nd_uint8_t ra_type;
123 nd_uint8_t ra_zero0;
124 };
125
126 #define AODV_RREQ 1 /* route request */
127 #define AODV_RREP 2 /* route response */
128 #define AODV_RERR 3 /* error report */
129 #define AODV_RREP_ACK 4 /* route response acknowledgement */
130 static const struct tok msg_type_str[] = {
131 { AODV_RREQ, "rreq" },
132 { AODV_RREP, "rrep" },
133 { AODV_RERR, "rerr" },
134 { AODV_RREP_ACK, "rrep-ack" },
135 { 0, NULL }
136 };
137
138 struct aodv_ext {
139 nd_uint8_t type; /* extension type */
140 nd_uint8_t length; /* extension length */
141 };
142
143 struct aodv_hello {
144 struct aodv_ext eh; /* extension header */
145 nd_uint32_t interval; /* expect my next hello in
146 * (n) ms
147 * NOTE: this is not aligned */
148 };
149
150 #define AODV_EXT_HELLO 1
151
152 static void
153 aodv_extension(netdissect_options *ndo,
154 const struct aodv_ext *ep, u_int length)
155 {
156 const struct aodv_hello *ah;
157 uint8_t ext_type, ext_length;
158
159 ext_type = GET_U_1(ep->type);
160 ext_length = GET_U_1(ep->length);
161 switch (ext_type) {
162 case AODV_EXT_HELLO:
163 ah = (const struct aodv_hello *)(const void *)ep;
164 ND_ICHECKMSG_ZU("ext data length", length, <,
165 sizeof(struct aodv_hello));
166 if (ext_length < 4) {
167 ND_PRINT("\n\text HELLO - bad length %u", ext_length);
168 goto invalid;
169 }
170 ND_PRINT("\n\text HELLO %u ms",
171 GET_BE_U_4(ah->interval));
172 break;
173
174 default:
175 ND_PRINT("\n\text %u %u", ext_type, ext_length);
176 break;
177 }
178 return;
179
180 invalid:
181 nd_print_invalid(ndo);
182 }
183
184 static void
185 aodv_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
186 {
187 u_int i;
188 const struct aodv_rreq *ap = (const struct aodv_rreq *)dat;
189
190 ND_ICHECKMSG_ZU("message length", length, <, sizeof(*ap));
191 ND_PRINT(" %u %s%s%s%s%shops %u id 0x%08x\n"
192 "\tdst %s seq %u src %s seq %u", length,
193 GET_U_1(ap->rreq_type) & RREQ_JOIN ? "[J]" : "",
194 GET_U_1(ap->rreq_type) & RREQ_REPAIR ? "[R]" : "",
195 GET_U_1(ap->rreq_type) & RREQ_GRAT ? "[G]" : "",
196 GET_U_1(ap->rreq_type) & RREQ_DEST ? "[D]" : "",
197 GET_U_1(ap->rreq_type) & RREQ_UNKNOWN ? "[U] " : " ",
198 GET_U_1(ap->rreq_hops),
199 GET_BE_U_4(ap->rreq_id),
200 GET_IPADDR_STRING(ap->rreq_da),
201 GET_BE_U_4(ap->rreq_ds),
202 GET_IPADDR_STRING(ap->rreq_oa),
203 GET_BE_U_4(ap->rreq_os));
204 i = length - sizeof(*ap);
205 if (i >= sizeof(struct aodv_ext))
206 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
207 return;
208
209 invalid:
210 nd_print_invalid(ndo);
211 }
212
213 static void
214 aodv_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
215 {
216 u_int i;
217 const struct aodv_rrep *ap = (const struct aodv_rrep *)dat;
218
219 ND_ICHECKMSG_ZU("message length", length, <, sizeof(*ap));
220 ND_PRINT(" %u %s%sprefix %u hops %u\n"
221 "\tdst %s dseq %u src %s %u ms", length,
222 GET_U_1(ap->rrep_type) & RREP_REPAIR ? "[R]" : "",
223 GET_U_1(ap->rrep_type) & RREP_ACK ? "[A] " : " ",
224 GET_U_1(ap->rrep_ps) & RREP_PREFIX_MASK,
225 GET_U_1(ap->rrep_hops),
226 GET_IPADDR_STRING(ap->rrep_da),
227 GET_BE_U_4(ap->rrep_ds),
228 GET_IPADDR_STRING(ap->rrep_oa),
229 GET_BE_U_4(ap->rrep_life));
230 i = length - sizeof(*ap);
231 if (i >= sizeof(struct aodv_ext))
232 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
233 return;
234
235 invalid:
236 nd_print_invalid(ndo);
237 }
238
239 static void
240 aodv_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
241 {
242 u_int i, dc;
243 const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
244 const struct rerr_unreach *dp;
245
246 ND_ICHECKMSG_ZU("message length", length, <, sizeof(*ap));
247 ND_PRINT(" %s [items %u] [%u]:",
248 GET_U_1(ap->rerr_flags) & RERR_NODELETE ? "[D]" : "",
249 GET_U_1(ap->rerr_dc), length);
250 dp = (const struct rerr_unreach *)(dat + sizeof(*ap));
251 i = length - sizeof(*ap);
252 for (dc = GET_U_1(ap->rerr_dc); dc != 0; dc--) {
253 ND_ICHECKMSG_ZU("remaining length", i, <, sizeof(*dp));
254 ND_PRINT(" {%s}(%u)", GET_IPADDR_STRING(dp->u_da),
255 GET_BE_U_4(dp->u_ds));
256 dp++;
257 i -= sizeof(*dp);
258 }
259 return;
260
261 invalid:
262 nd_print_invalid(ndo);
263 }
264
265 static void
266 aodv_v6_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
267 {
268 u_int i;
269 const struct aodv_rreq6 *ap = (const struct aodv_rreq6 *)dat;
270
271 ND_ICHECKMSG_ZU("message length", length, <, sizeof(*ap));
272 ND_PRINT(" %u %s%s%s%s%shops %u id 0x%08x\n"
273 "\tdst %s seq %u src %s seq %u", length,
274 GET_U_1(ap->rreq_type) & RREQ_JOIN ? "[J]" : "",
275 GET_U_1(ap->rreq_type) & RREQ_REPAIR ? "[R]" : "",
276 GET_U_1(ap->rreq_type) & RREQ_GRAT ? "[G]" : "",
277 GET_U_1(ap->rreq_type) & RREQ_DEST ? "[D]" : "",
278 GET_U_1(ap->rreq_type) & RREQ_UNKNOWN ? "[U] " : " ",
279 GET_U_1(ap->rreq_hops),
280 GET_BE_U_4(ap->rreq_id),
281 GET_IP6ADDR_STRING(ap->rreq_da),
282 GET_BE_U_4(ap->rreq_ds),
283 GET_IP6ADDR_STRING(ap->rreq_oa),
284 GET_BE_U_4(ap->rreq_os));
285 i = length - sizeof(*ap);
286 if (i >= sizeof(struct aodv_ext))
287 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
288 return;
289
290 invalid:
291 nd_print_invalid(ndo);
292 }
293
294 static void
295 aodv_v6_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
296 {
297 u_int i;
298 const struct aodv_rrep6 *ap = (const struct aodv_rrep6 *)dat;
299
300 ND_ICHECKMSG_ZU("message length", length, <, sizeof(*ap));
301 ND_PRINT(" %u %s%sprefix %u hops %u\n"
302 "\tdst %s dseq %u src %s %u ms", length,
303 GET_U_1(ap->rrep_type) & RREP_REPAIR ? "[R]" : "",
304 GET_U_1(ap->rrep_type) & RREP_ACK ? "[A] " : " ",
305 GET_U_1(ap->rrep_ps) & RREP_PREFIX_MASK,
306 GET_U_1(ap->rrep_hops),
307 GET_IP6ADDR_STRING(ap->rrep_da),
308 GET_BE_U_4(ap->rrep_ds),
309 GET_IP6ADDR_STRING(ap->rrep_oa),
310 GET_BE_U_4(ap->rrep_life));
311 i = length - sizeof(*ap);
312 if (i >= sizeof(struct aodv_ext))
313 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
314 return;
315
316 invalid:
317 nd_print_invalid(ndo);
318 }
319
320 static void
321 aodv_v6_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
322 {
323 u_int i, dc;
324 const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
325 const struct rerr_unreach6 *dp6;
326
327 ND_ICHECKMSG_ZU("message length", length, <, sizeof(*ap));
328 ND_PRINT(" %s [items %u] [%u]:",
329 GET_U_1(ap->rerr_flags) & RERR_NODELETE ? "[D]" : "",
330 GET_U_1(ap->rerr_dc), length);
331 dp6 = (const struct rerr_unreach6 *)(const void *)(ap + 1);
332 i = length - sizeof(*ap);
333 for (dc = GET_U_1(ap->rerr_dc); dc != 0; dc--) {
334 ND_ICHECKMSG_ZU("remaining length", i, <, sizeof(*dp6));
335 ND_PRINT(" {%s}(%u)", GET_IP6ADDR_STRING(dp6->u_da),
336 GET_BE_U_4(dp6->u_ds));
337 dp6++;
338 i -= sizeof(*dp6);
339 }
340 return;
341
342 invalid:
343 nd_print_invalid(ndo);
344 }
345
346 void
347 aodv_print(netdissect_options *ndo,
348 const u_char *dat, u_int length, int is_ip6)
349 {
350 uint8_t msg_type;
351
352 ndo->ndo_protocol = "aodv";
353 ND_PRINT(" aodv");
354
355 /*
356 * The message type is the first byte; make sure we have it
357 * and then fetch it.
358 */
359 msg_type = GET_U_1(dat);
360 ND_PRINT(" %s", tok2str(msg_type_str, "type %u", msg_type));
361
362 switch (msg_type) {
363
364 case AODV_RREQ:
365 if (is_ip6)
366 aodv_v6_rreq(ndo, dat, length);
367 else
368 aodv_rreq(ndo, dat, length);
369 break;
370
371 case AODV_RREP:
372 if (is_ip6)
373 aodv_v6_rrep(ndo, dat, length);
374 else
375 aodv_rrep(ndo, dat, length);
376 break;
377
378 case AODV_RERR:
379 if (is_ip6)
380 aodv_v6_rerr(ndo, dat, length);
381 else
382 aodv_rerr(ndo, dat, length);
383 break;
384
385 case AODV_RREP_ACK:
386 ND_PRINT(" %u", length);
387 break;
388
389 default:
390 ND_PRINT(" %u", length);
391 }
392 }
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