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Cirrus CI: Fixup the previous commit. [skip appveyor]
[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_LCHECKMSG_ZU(length, sizeof(struct aodv_hello), "ext data length");
165 if (ext_length < 4) {
166 ND_PRINT("\n\text HELLO - bad length %u", ext_length);
167 goto invalid;
168 }
169 ND_PRINT("\n\text HELLO %u ms",
170 GET_BE_U_4(ah->interval));
171 break;
172
173 default:
174 ND_PRINT("\n\text %u %u", ext_type, ext_length);
175 break;
176 }
177 return;
178
179 invalid:
180 nd_print_invalid(ndo);
181 }
182
183 static void
184 aodv_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
185 {
186 u_int i;
187 const struct aodv_rreq *ap = (const struct aodv_rreq *)dat;
188
189 ND_LCHECKMSG_ZU(length, sizeof(*ap), "message length");
190 ND_PRINT(" %u %s%s%s%s%shops %u id 0x%08x\n"
191 "\tdst %s seq %u src %s seq %u", length,
192 GET_U_1(ap->rreq_type) & RREQ_JOIN ? "[J]" : "",
193 GET_U_1(ap->rreq_type) & RREQ_REPAIR ? "[R]" : "",
194 GET_U_1(ap->rreq_type) & RREQ_GRAT ? "[G]" : "",
195 GET_U_1(ap->rreq_type) & RREQ_DEST ? "[D]" : "",
196 GET_U_1(ap->rreq_type) & RREQ_UNKNOWN ? "[U] " : " ",
197 GET_U_1(ap->rreq_hops),
198 GET_BE_U_4(ap->rreq_id),
199 GET_IPADDR_STRING(ap->rreq_da),
200 GET_BE_U_4(ap->rreq_ds),
201 GET_IPADDR_STRING(ap->rreq_oa),
202 GET_BE_U_4(ap->rreq_os));
203 i = length - sizeof(*ap);
204 if (i >= sizeof(struct aodv_ext))
205 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
206 return;
207
208 invalid:
209 nd_print_invalid(ndo);
210 }
211
212 static void
213 aodv_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
214 {
215 u_int i;
216 const struct aodv_rrep *ap = (const struct aodv_rrep *)dat;
217
218 ND_LCHECKMSG_ZU(length, sizeof(*ap), "message length");
219 ND_PRINT(" %u %s%sprefix %u hops %u\n"
220 "\tdst %s dseq %u src %s %u ms", length,
221 GET_U_1(ap->rrep_type) & RREP_REPAIR ? "[R]" : "",
222 GET_U_1(ap->rrep_type) & RREP_ACK ? "[A] " : " ",
223 GET_U_1(ap->rrep_ps) & RREP_PREFIX_MASK,
224 GET_U_1(ap->rrep_hops),
225 GET_IPADDR_STRING(ap->rrep_da),
226 GET_BE_U_4(ap->rrep_ds),
227 GET_IPADDR_STRING(ap->rrep_oa),
228 GET_BE_U_4(ap->rrep_life));
229 i = length - sizeof(*ap);
230 if (i >= sizeof(struct aodv_ext))
231 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
232 return;
233
234 invalid:
235 nd_print_invalid(ndo);
236 }
237
238 static void
239 aodv_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
240 {
241 u_int i, dc;
242 const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
243 const struct rerr_unreach *dp;
244
245 ND_LCHECKMSG_ZU(length, sizeof(*ap), "message length");
246 ND_PRINT(" %s [items %u] [%u]:",
247 GET_U_1(ap->rerr_flags) & RERR_NODELETE ? "[D]" : "",
248 GET_U_1(ap->rerr_dc), length);
249 dp = (const struct rerr_unreach *)(dat + sizeof(*ap));
250 i = length - sizeof(*ap);
251 for (dc = GET_U_1(ap->rerr_dc); dc != 0; dc--) {
252 ND_LCHECKMSG_ZU(i, sizeof(*dp), "remaining length");
253 ND_PRINT(" {%s}(%u)", GET_IPADDR_STRING(dp->u_da),
254 GET_BE_U_4(dp->u_ds));
255 dp++;
256 i -= sizeof(*dp);
257 }
258 return;
259
260 invalid:
261 nd_print_invalid(ndo);
262 }
263
264 static void
265 aodv_v6_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
266 {
267 u_int i;
268 const struct aodv_rreq6 *ap = (const struct aodv_rreq6 *)dat;
269
270 ND_LCHECKMSG_ZU(length, sizeof(*ap), "message length");
271 ND_PRINT(" %u %s%s%s%s%shops %u id 0x%08x\n"
272 "\tdst %s seq %u src %s seq %u", length,
273 GET_U_1(ap->rreq_type) & RREQ_JOIN ? "[J]" : "",
274 GET_U_1(ap->rreq_type) & RREQ_REPAIR ? "[R]" : "",
275 GET_U_1(ap->rreq_type) & RREQ_GRAT ? "[G]" : "",
276 GET_U_1(ap->rreq_type) & RREQ_DEST ? "[D]" : "",
277 GET_U_1(ap->rreq_type) & RREQ_UNKNOWN ? "[U] " : " ",
278 GET_U_1(ap->rreq_hops),
279 GET_BE_U_4(ap->rreq_id),
280 GET_IP6ADDR_STRING(ap->rreq_da),
281 GET_BE_U_4(ap->rreq_ds),
282 GET_IP6ADDR_STRING(ap->rreq_oa),
283 GET_BE_U_4(ap->rreq_os));
284 i = length - sizeof(*ap);
285 if (i >= sizeof(struct aodv_ext))
286 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
287 return;
288
289 invalid:
290 nd_print_invalid(ndo);
291 }
292
293 static void
294 aodv_v6_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
295 {
296 u_int i;
297 const struct aodv_rrep6 *ap = (const struct aodv_rrep6 *)dat;
298
299 ND_LCHECKMSG_ZU(length, sizeof(*ap), "message length");
300 ND_PRINT(" %u %s%sprefix %u hops %u\n"
301 "\tdst %s dseq %u src %s %u ms", length,
302 GET_U_1(ap->rrep_type) & RREP_REPAIR ? "[R]" : "",
303 GET_U_1(ap->rrep_type) & RREP_ACK ? "[A] " : " ",
304 GET_U_1(ap->rrep_ps) & RREP_PREFIX_MASK,
305 GET_U_1(ap->rrep_hops),
306 GET_IP6ADDR_STRING(ap->rrep_da),
307 GET_BE_U_4(ap->rrep_ds),
308 GET_IP6ADDR_STRING(ap->rrep_oa),
309 GET_BE_U_4(ap->rrep_life));
310 i = length - sizeof(*ap);
311 if (i >= sizeof(struct aodv_ext))
312 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
313 return;
314
315 invalid:
316 nd_print_invalid(ndo);
317 }
318
319 static void
320 aodv_v6_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
321 {
322 u_int i, dc;
323 const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
324 const struct rerr_unreach6 *dp6;
325
326 ND_LCHECKMSG_ZU(length, sizeof(*ap), "message length");
327 ND_PRINT(" %s [items %u] [%u]:",
328 GET_U_1(ap->rerr_flags) & RERR_NODELETE ? "[D]" : "",
329 GET_U_1(ap->rerr_dc), length);
330 dp6 = (const struct rerr_unreach6 *)(const void *)(ap + 1);
331 i = length - sizeof(*ap);
332 for (dc = GET_U_1(ap->rerr_dc); dc != 0; dc--) {
333 ND_LCHECKMSG_ZU(i, sizeof(*dp6), "remaining length");
334 ND_PRINT(" {%s}(%u)", GET_IP6ADDR_STRING(dp6->u_da),
335 GET_BE_U_4(dp6->u_ds));
336 dp6++;
337 i -= sizeof(*dp6);
338 }
339 return;
340
341 invalid:
342 nd_print_invalid(ndo);
343 }
344
345 void
346 aodv_print(netdissect_options *ndo,
347 const u_char *dat, u_int length, int is_ip6)
348 {
349 uint8_t msg_type;
350
351 ndo->ndo_protocol = "aodv";
352 ND_PRINT(" aodv");
353
354 /*
355 * The message type is the first byte; make sure we have it
356 * and then fetch it.
357 */
358 msg_type = GET_U_1(dat);
359 ND_PRINT(" %s", tok2str(msg_type_str, "type %u", msg_type));
360
361 switch (msg_type) {
362
363 case AODV_RREQ:
364 if (is_ip6)
365 aodv_v6_rreq(ndo, dat, length);
366 else
367 aodv_rreq(ndo, dat, length);
368 break;
369
370 case AODV_RREP:
371 if (is_ip6)
372 aodv_v6_rrep(ndo, dat, length);
373 else
374 aodv_rrep(ndo, dat, length);
375 break;
376
377 case AODV_RERR:
378 if (is_ip6)
379 aodv_v6_rerr(ndo, dat, length);
380 else
381 aodv_rerr(ndo, dat, length);
382 break;
383
384 case AODV_RREP_ACK:
385 ND_PRINT(" %u", length);
386 break;
387
388 default:
389 ND_PRINT(" %u", length);
390 }
391 }
[mirror] the TCPdump network dissector