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
35 #ifdef HAVE_CONFIG_H
36 #include "config.h"
37 #endif
38
39 #include <netdissect-stdinc.h>
40
41 #include "netdissect.h"
42 #include "addrtoname.h"
43 #include "extract.h"
44
45 /*
46 * RFC 3561
47 */
48 struct aodv_rreq {
49 uint8_t rreq_type; /* AODV message type (1) */
50 uint8_t rreq_flags; /* various flags */
51 uint8_t rreq_zero0; /* reserved, set to zero */
52 uint8_t rreq_hops; /* number of hops from originator */
53 uint32_t rreq_id; /* request ID */
54 uint32_t rreq_da; /* destination IPv4 address */
55 uint32_t rreq_ds; /* destination sequence number */
56 uint32_t rreq_oa; /* originator IPv4 address */
57 uint32_t rreq_os; /* originator sequence number */
58 };
59 struct aodv_rreq6 {
60 uint8_t rreq_type; /* AODV message type (1) */
61 uint8_t rreq_flags; /* various flags */
62 uint8_t rreq_zero0; /* reserved, set to zero */
63 uint8_t rreq_hops; /* number of hops from originator */
64 uint32_t rreq_id; /* request ID */
65 struct in6_addr rreq_da; /* destination IPv6 address */
66 uint32_t rreq_ds; /* destination sequence number */
67 struct in6_addr rreq_oa; /* originator IPv6 address */
68 uint32_t rreq_os; /* originator sequence number */
69 };
70 struct aodv_rreq6_draft_01 {
71 uint8_t rreq_type; /* AODV message type (16) */
72 uint8_t rreq_flags; /* various flags */
73 uint8_t rreq_zero0; /* reserved, set to zero */
74 uint8_t rreq_hops; /* number of hops from originator */
75 uint32_t rreq_id; /* request ID */
76 uint32_t rreq_ds; /* destination sequence number */
77 uint32_t rreq_os; /* originator sequence number */
78 struct in6_addr rreq_da; /* destination IPv6 address */
79 struct in6_addr rreq_oa; /* originator IPv6 address */
80 };
81
82 #define RREQ_JOIN 0x80 /* join (reserved for multicast */
83 #define RREQ_REPAIR 0x40 /* repair (reserved for multicast */
84 #define RREQ_GRAT 0x20 /* gratuitous RREP */
85 #define RREQ_DEST 0x10 /* destination only */
86 #define RREQ_UNKNOWN 0x08 /* unknown destination sequence num */
87 #define RREQ_FLAGS_MASK 0xF8 /* mask for rreq_flags */
88
89 struct aodv_rrep {
90 uint8_t rrep_type; /* AODV message type (2) */
91 uint8_t rrep_flags; /* various flags */
92 uint8_t rrep_ps; /* prefix size */
93 uint8_t rrep_hops; /* number of hops from o to d */
94 uint32_t rrep_da; /* destination IPv4 address */
95 uint32_t rrep_ds; /* destination sequence number */
96 uint32_t rrep_oa; /* originator IPv4 address */
97 uint32_t rrep_life; /* lifetime of this route */
98 };
99 struct aodv_rrep6 {
100 uint8_t rrep_type; /* AODV message type (2) */
101 uint8_t rrep_flags; /* various flags */
102 uint8_t rrep_ps; /* prefix size */
103 uint8_t rrep_hops; /* number of hops from o to d */
104 struct in6_addr rrep_da; /* destination IPv6 address */
105 uint32_t rrep_ds; /* destination sequence number */
106 struct in6_addr rrep_oa; /* originator IPv6 address */
107 uint32_t rrep_life; /* lifetime of this route */
108 };
109 struct aodv_rrep6_draft_01 {
110 uint8_t rrep_type; /* AODV message type (17) */
111 uint8_t rrep_flags; /* various flags */
112 uint8_t rrep_ps; /* prefix size */
113 uint8_t rrep_hops; /* number of hops from o to d */
114 uint32_t rrep_ds; /* destination sequence number */
115 struct in6_addr rrep_da; /* destination IPv6 address */
116 struct in6_addr rrep_oa; /* originator IPv6 address */
117 uint32_t rrep_life; /* lifetime of this route */
118 };
119
120 #define RREP_REPAIR 0x80 /* repair (reserved for multicast */
121 #define RREP_ACK 0x40 /* acknowledgement required */
122 #define RREP_FLAGS_MASK 0xC0 /* mask for rrep_flags */
123 #define RREP_PREFIX_MASK 0x1F /* mask for prefix size */
124
125 struct rerr_unreach {
126 uint32_t u_da; /* IPv4 address */
127 uint32_t u_ds; /* sequence number */
128 };
129 struct rerr_unreach6 {
130 struct in6_addr u_da; /* IPv6 address */
131 uint32_t u_ds; /* sequence number */
132 };
133 struct rerr_unreach6_draft_01 {
134 struct in6_addr u_da; /* IPv6 address */
135 uint32_t u_ds; /* sequence number */
136 };
137
138 struct aodv_rerr {
139 uint8_t rerr_type; /* AODV message type (3 or 18) */
140 uint8_t rerr_flags; /* various flags */
141 uint8_t rerr_zero0; /* reserved, set to zero */
142 uint8_t rerr_dc; /* destination count */
143 };
144
145 #define RERR_NODELETE 0x80 /* don't delete the link */
146 #define RERR_FLAGS_MASK 0x80 /* mask for rerr_flags */
147
148 struct aodv_rrep_ack {
149 uint8_t ra_type;
150 uint8_t ra_zero0;
151 };
152
153 #define AODV_RREQ 1 /* route request */
154 #define AODV_RREP 2 /* route response */
155 #define AODV_RERR 3 /* error report */
156 #define AODV_RREP_ACK 4 /* route response acknowledgement */
157
158 #define AODV_V6_DRAFT_01_RREQ 16 /* IPv6 route request */
159 #define AODV_V6_DRAFT_01_RREP 17 /* IPv6 route response */
160 #define AODV_V6_DRAFT_01_RERR 18 /* IPv6 error report */
161 #define AODV_V6_DRAFT_01_RREP_ACK 19 /* IPV6 route response acknowledgment */
162
163 struct aodv_ext {
164 uint8_t type; /* extension type */
165 uint8_t length; /* extension length */
166 };
167
168 struct aodv_hello {
169 struct aodv_ext eh; /* extension header */
170 uint8_t interval[4]; /* expect my next hello in
171 * (n) ms
172 * NOTE: this is not aligned */
173 };
174
175 #define AODV_EXT_HELLO 1
176
177 static void
aodv_extension(netdissect_options * ndo,const struct aodv_ext * ep,u_int length)178 aodv_extension(netdissect_options *ndo,
179 const struct aodv_ext *ep, u_int length)
180 {
181 const struct aodv_hello *ah;
182
183 ND_TCHECK(*ep);
184 switch (ep->type) {
185 case AODV_EXT_HELLO:
186 ah = (const struct aodv_hello *)(const void *)ep;
187 ND_TCHECK(*ah);
188 if (length < sizeof(struct aodv_hello))
189 goto trunc;
190 if (ep->length < 4) {
191 ND_PRINT((ndo, "\n\text HELLO - bad length %u", ep->length));
192 break;
193 }
194 ND_PRINT((ndo, "\n\text HELLO %ld ms",
195 (unsigned long)EXTRACT_32BITS(&ah->interval)));
196 break;
197
198 default:
199 ND_PRINT((ndo, "\n\text %u %u", ep->type, ep->length));
200 break;
201 }
202 return;
203
204 trunc:
205 ND_PRINT((ndo, " [|hello]"));
206 }
207
208 static void
aodv_rreq(netdissect_options * ndo,const u_char * dat,u_int length)209 aodv_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
210 {
211 u_int i;
212 const struct aodv_rreq *ap = (const struct aodv_rreq *)dat;
213
214 ND_TCHECK(*ap);
215 if (length < sizeof(*ap))
216 goto trunc;
217 ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
218 "\tdst %s seq %lu src %s seq %lu", length,
219 ap->rreq_type & RREQ_JOIN ? "[J]" : "",
220 ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
221 ap->rreq_type & RREQ_GRAT ? "[G]" : "",
222 ap->rreq_type & RREQ_DEST ? "[D]" : "",
223 ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
224 ap->rreq_hops,
225 (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
226 ipaddr_string(ndo, &ap->rreq_da),
227 (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
228 ipaddr_string(ndo, &ap->rreq_oa),
229 (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
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 trunc:
236 ND_PRINT((ndo, " [|rreq"));
237 }
238
239 static void
aodv_rrep(netdissect_options * ndo,const u_char * dat,u_int length)240 aodv_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
241 {
242 u_int i;
243 const struct aodv_rrep *ap = (const struct aodv_rrep *)dat;
244
245 ND_TCHECK(*ap);
246 if (length < sizeof(*ap))
247 goto trunc;
248 ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
249 "\tdst %s dseq %lu src %s %lu ms", length,
250 ap->rrep_type & RREP_REPAIR ? "[R]" : "",
251 ap->rrep_type & RREP_ACK ? "[A] " : " ",
252 ap->rrep_ps & RREP_PREFIX_MASK,
253 ap->rrep_hops,
254 ipaddr_string(ndo, &ap->rrep_da),
255 (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
256 ipaddr_string(ndo, &ap->rrep_oa),
257 (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
258 i = length - sizeof(*ap);
259 if (i >= sizeof(struct aodv_ext))
260 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
261 return;
262
263 trunc:
264 ND_PRINT((ndo, " [|rreq"));
265 }
266
267 static void
aodv_rerr(netdissect_options * ndo,const u_char * dat,u_int length)268 aodv_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
269 {
270 u_int i, dc;
271 const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
272 const struct rerr_unreach *dp;
273
274 ND_TCHECK(*ap);
275 if (length < sizeof(*ap))
276 goto trunc;
277 ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
278 ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
279 ap->rerr_dc, length));
280 dp = (const struct rerr_unreach *)(dat + sizeof(*ap));
281 i = length - sizeof(*ap);
282 for (dc = ap->rerr_dc; dc != 0; dc--) {
283 ND_TCHECK(*dp);
284 if (i < sizeof(*dp))
285 goto trunc;
286 ND_PRINT((ndo, " {%s}(%ld)", ipaddr_string(ndo, &dp->u_da),
287 (unsigned long)EXTRACT_32BITS(&dp->u_ds)));
288 dp++;
289 i -= sizeof(*dp);
290 }
291 return;
292
293 trunc:
294 ND_PRINT((ndo, "[|rerr]"));
295 }
296
297 static void
aodv_v6_rreq(netdissect_options * ndo,const u_char * dat,u_int length)298 aodv_v6_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
299 {
300 u_int i;
301 const struct aodv_rreq6 *ap = (const struct aodv_rreq6 *)dat;
302
303 ND_TCHECK(*ap);
304 if (length < sizeof(*ap))
305 goto trunc;
306 ND_PRINT((ndo, " v6 rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
307 "\tdst %s seq %lu src %s seq %lu", length,
308 ap->rreq_type & RREQ_JOIN ? "[J]" : "",
309 ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
310 ap->rreq_type & RREQ_GRAT ? "[G]" : "",
311 ap->rreq_type & RREQ_DEST ? "[D]" : "",
312 ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
313 ap->rreq_hops,
314 (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
315 ip6addr_string(ndo, &ap->rreq_da),
316 (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
317 ip6addr_string(ndo, &ap->rreq_oa),
318 (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
319 i = length - sizeof(*ap);
320 if (i >= sizeof(struct aodv_ext))
321 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
322 return;
323
324 trunc:
325 ND_PRINT((ndo, " [|rreq"));
326 }
327
328 static void
aodv_v6_rrep(netdissect_options * ndo,const u_char * dat,u_int length)329 aodv_v6_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
330 {
331 u_int i;
332 const struct aodv_rrep6 *ap = (const struct aodv_rrep6 *)dat;
333
334 ND_TCHECK(*ap);
335 if (length < sizeof(*ap))
336 goto trunc;
337 ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
338 "\tdst %s dseq %lu src %s %lu ms", length,
339 ap->rrep_type & RREP_REPAIR ? "[R]" : "",
340 ap->rrep_type & RREP_ACK ? "[A] " : " ",
341 ap->rrep_ps & RREP_PREFIX_MASK,
342 ap->rrep_hops,
343 ip6addr_string(ndo, &ap->rrep_da),
344 (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
345 ip6addr_string(ndo, &ap->rrep_oa),
346 (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
347 i = length - sizeof(*ap);
348 if (i >= sizeof(struct aodv_ext))
349 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
350 return;
351
352 trunc:
353 ND_PRINT((ndo, " [|rreq"));
354 }
355
356 static void
aodv_v6_rerr(netdissect_options * ndo,const u_char * dat,u_int length)357 aodv_v6_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
358 {
359 u_int i, dc;
360 const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
361 const struct rerr_unreach6 *dp6;
362
363 ND_TCHECK(*ap);
364 if (length < sizeof(*ap))
365 goto trunc;
366 ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
367 ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
368 ap->rerr_dc, length));
369 dp6 = (const struct rerr_unreach6 *)(const void *)(ap + 1);
370 i = length - sizeof(*ap);
371 for (dc = ap->rerr_dc; dc != 0; dc--) {
372 ND_TCHECK(*dp6);
373 if (i < sizeof(*dp6))
374 goto trunc;
375 ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
376 (unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
377 dp6++;
378 i -= sizeof(*dp6);
379 }
380 return;
381
382 trunc:
383 ND_PRINT((ndo, "[|rerr]"));
384 }
385
386 static void
aodv_v6_draft_01_rreq(netdissect_options * ndo,const u_char * dat,u_int length)387 aodv_v6_draft_01_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
388 {
389 u_int i;
390 const struct aodv_rreq6_draft_01 *ap = (const struct aodv_rreq6_draft_01 *)dat;
391
392 ND_TCHECK(*ap);
393 if (length < sizeof(*ap))
394 goto trunc;
395 ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
396 "\tdst %s seq %lu src %s seq %lu", length,
397 ap->rreq_type & RREQ_JOIN ? "[J]" : "",
398 ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
399 ap->rreq_type & RREQ_GRAT ? "[G]" : "",
400 ap->rreq_type & RREQ_DEST ? "[D]" : "",
401 ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
402 ap->rreq_hops,
403 (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
404 ip6addr_string(ndo, &ap->rreq_da),
405 (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
406 ip6addr_string(ndo, &ap->rreq_oa),
407 (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
408 i = length - sizeof(*ap);
409 if (i >= sizeof(struct aodv_ext))
410 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
411 return;
412
413 trunc:
414 ND_PRINT((ndo, " [|rreq"));
415 }
416
417 static void
aodv_v6_draft_01_rrep(netdissect_options * ndo,const u_char * dat,u_int length)418 aodv_v6_draft_01_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
419 {
420 u_int i;
421 const struct aodv_rrep6_draft_01 *ap = (const struct aodv_rrep6_draft_01 *)dat;
422
423 ND_TCHECK(*ap);
424 if (length < sizeof(*ap))
425 goto trunc;
426 ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
427 "\tdst %s dseq %lu src %s %lu ms", length,
428 ap->rrep_type & RREP_REPAIR ? "[R]" : "",
429 ap->rrep_type & RREP_ACK ? "[A] " : " ",
430 ap->rrep_ps & RREP_PREFIX_MASK,
431 ap->rrep_hops,
432 ip6addr_string(ndo, &ap->rrep_da),
433 (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
434 ip6addr_string(ndo, &ap->rrep_oa),
435 (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
436 i = length - sizeof(*ap);
437 if (i >= sizeof(struct aodv_ext))
438 aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
439 return;
440
441 trunc:
442 ND_PRINT((ndo, " [|rreq"));
443 }
444
445 static void
aodv_v6_draft_01_rerr(netdissect_options * ndo,const u_char * dat,u_int length)446 aodv_v6_draft_01_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
447 {
448 u_int i, dc;
449 const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
450 const struct rerr_unreach6_draft_01 *dp6;
451
452 ND_TCHECK(*ap);
453 if (length < sizeof(*ap))
454 goto trunc;
455 ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
456 ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
457 ap->rerr_dc, length));
458 dp6 = (const struct rerr_unreach6_draft_01 *)(const void *)(ap + 1);
459 i = length - sizeof(*ap);
460 for (dc = ap->rerr_dc; dc != 0; dc--) {
461 ND_TCHECK(*dp6);
462 if (i < sizeof(*dp6))
463 goto trunc;
464 ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
465 (unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
466 dp6++;
467 i -= sizeof(*dp6);
468 }
469 return;
470
471 trunc:
472 ND_PRINT((ndo, "[|rerr]"));
473 }
474
475 void
aodv_print(netdissect_options * ndo,const u_char * dat,u_int length,int is_ip6)476 aodv_print(netdissect_options *ndo,
477 const u_char *dat, u_int length, int is_ip6)
478 {
479 uint8_t msg_type;
480
481 /*
482 * The message type is the first byte; make sure we have it
483 * and then fetch it.
484 */
485 ND_TCHECK(*dat);
486 msg_type = *dat;
487 ND_PRINT((ndo, " aodv"));
488
489 switch (msg_type) {
490
491 case AODV_RREQ:
492 if (is_ip6)
493 aodv_v6_rreq(ndo, dat, length);
494 else
495 aodv_rreq(ndo, dat, length);
496 break;
497
498 case AODV_RREP:
499 if (is_ip6)
500 aodv_v6_rrep(ndo, dat, length);
501 else
502 aodv_rrep(ndo, dat, length);
503 break;
504
505 case AODV_RERR:
506 if (is_ip6)
507 aodv_v6_rerr(ndo, dat, length);
508 else
509 aodv_rerr(ndo, dat, length);
510 break;
511
512 case AODV_RREP_ACK:
513 ND_PRINT((ndo, " rrep-ack %u", length));
514 break;
515
516 case AODV_V6_DRAFT_01_RREQ:
517 aodv_v6_draft_01_rreq(ndo, dat, length);
518 break;
519
520 case AODV_V6_DRAFT_01_RREP:
521 aodv_v6_draft_01_rrep(ndo, dat, length);
522 break;
523
524 case AODV_V6_DRAFT_01_RERR:
525 aodv_v6_draft_01_rerr(ndo, dat, length);
526 break;
527
528 case AODV_V6_DRAFT_01_RREP_ACK:
529 ND_PRINT((ndo, " rrep-ack %u", length));
530 break;
531
532 default:
533 ND_PRINT((ndo, " type %u %u", msg_type, length));
534 }
535 return;
536
537 trunc:
538 ND_PRINT((ndo, " [|aodv]"));
539 }
540