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Rename the fn_printX() functions to nd_printX()
[tcpdump] / print-olsr.c
1 /*
2 * Copyright (c) 1998-2007 The TCPDUMP project
3 * Copyright (c) 2009 Florian Forster
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code
7 * distributions retain the above copyright notice and this paragraph
8 * in its entirety, and (2) distributions including binary code include
9 * the above copyright notice and this paragraph in its entirety in
10 * the documentation or other materials provided with the distribution.
11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
12 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
13 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
14 * FOR A PARTICULAR PURPOSE.
15 *
16 * Original code by Hannes Gredler <hannes@gredler.at>
17 * IPv6 additions by Florian Forster <octo at verplant.org>
18 */
19
20 /* \summary: Optimized Link State Routing Protocol (OLSR) printer */
21
22 /* specification: RFC 3626 */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include "netdissect-stdinc.h"
29
30 #include "netdissect.h"
31 #include "addrtoname.h"
32 #include "extract.h"
33
34 /*
35 * RFC 3626 common header
36 *
37 * 0 1 2 3
38 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
39 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
40 * | Packet Length | Packet Sequence Number |
41 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
42 * | Message Type | Vtime | Message Size |
43 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44 * | Originator Address |
45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46 * | Time To Live | Hop Count | Message Sequence Number |
47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48 * | |
49 * : MESSAGE :
50 * | |
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 * | Message Type | Vtime | Message Size |
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54 * | Originator Address |
55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
56 * | Time To Live | Hop Count | Message Sequence Number |
57 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
58 * | |
59 * : MESSAGE :
60 * | |
61 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
62 * : :
63 */
64
65 struct olsr_common {
66 nd_uint16_t packet_len;
67 nd_uint16_t packet_seq;
68 };
69
70 #define OLSR_HELLO_MSG 1 /* rfc3626 */
71 #define OLSR_TC_MSG 2 /* rfc3626 */
72 #define OLSR_MID_MSG 3 /* rfc3626 */
73 #define OLSR_HNA_MSG 4 /* rfc3626 */
74 #define OLSR_POWERINFO_MSG 128
75 #define OLSR_NAMESERVICE_MSG 130
76 #define OLSR_HELLO_LQ_MSG 201 /* LQ extensions olsr.org */
77 #define OLSR_TC_LQ_MSG 202 /* LQ extensions olsr.org */
78
79 static const struct tok olsr_msg_values[] = {
80 { OLSR_HELLO_MSG, "Hello" },
81 { OLSR_TC_MSG, "TC" },
82 { OLSR_MID_MSG, "MID" },
83 { OLSR_HNA_MSG, "HNA" },
84 { OLSR_POWERINFO_MSG, "Powerinfo" },
85 { OLSR_NAMESERVICE_MSG, "Nameservice" },
86 { OLSR_HELLO_LQ_MSG, "Hello-LQ" },
87 { OLSR_TC_LQ_MSG, "TC-LQ" },
88 { 0, NULL}
89 };
90
91 struct olsr_msg4 {
92 nd_uint8_t msg_type;
93 nd_uint8_t vtime;
94 nd_uint16_t msg_len;
95 nd_ipv4 originator;
96 nd_uint8_t ttl;
97 nd_uint8_t hopcount;
98 nd_uint16_t msg_seq;
99 };
100
101 struct olsr_msg6 {
102 nd_uint8_t msg_type;
103 nd_uint8_t vtime;
104 nd_uint16_t msg_len;
105 nd_ipv6 originator;
106 nd_uint8_t ttl;
107 nd_uint8_t hopcount;
108 nd_uint16_t msg_seq;
109 };
110
111 struct olsr_hello {
112 nd_byte res[2];
113 nd_uint8_t htime;
114 nd_uint8_t will;
115 };
116
117 struct olsr_hello_link {
118 nd_uint8_t link_code;
119 nd_byte res;
120 nd_uint16_t len;
121 };
122
123 struct olsr_tc {
124 nd_uint16_t ans_seq;
125 nd_byte res[2];
126 };
127
128 struct olsr_hna4 {
129 nd_ipv4 network;
130 nd_ipv4 mask;
131 };
132
133 struct olsr_hna6 {
134 nd_ipv6 network;
135 nd_ipv6 mask;
136 };
137
138
139 /** gateway HNA flags */
140 enum gateway_hna_flags {
141 GW_HNA_FLAG_LINKSPEED = 1 << 0,
142 GW_HNA_FLAG_IPV4 = 1 << 1,
143 GW_HNA_FLAG_IPV4_NAT = 1 << 2,
144 GW_HNA_FLAG_IPV6 = 1 << 3,
145 GW_HNA_FLAG_IPV6PREFIX = 1 << 4
146 };
147
148 /** gateway HNA field byte offsets in the netmask field of the HNA */
149 enum gateway_hna_fields {
150 GW_HNA_PAD = 0,
151 GW_HNA_FLAGS = 1,
152 GW_HNA_UPLINK = 2,
153 GW_HNA_DOWNLINK = 3,
154 GW_HNA_V6PREFIXLEN = 4,
155 GW_HNA_V6PREFIX = 5
156 };
157
158
159 #define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
160 #define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
161
162 static const struct tok olsr_link_type_values[] = {
163 { 0, "Unspecified" },
164 { 1, "Asymmetric" },
165 { 2, "Symmetric" },
166 { 3, "Lost" },
167 { 0, NULL}
168 };
169
170 static const struct tok olsr_neighbor_type_values[] = {
171 { 0, "Not-Neighbor" },
172 { 1, "Symmetric" },
173 { 2, "Symmetric-MPR" },
174 { 0, NULL}
175 };
176
177 struct olsr_lq_neighbor4 {
178 nd_ipv4 neighbor;
179 nd_uint8_t link_quality;
180 nd_uint8_t neighbor_link_quality;
181 nd_byte res[2];
182 };
183
184 struct olsr_lq_neighbor6 {
185 nd_ipv6 neighbor;
186 nd_uint8_t link_quality;
187 nd_uint8_t neighbor_link_quality;
188 nd_byte res[2];
189 };
190
191 #define MAX_SMARTGW_SPEED 320000000
192
193 /**
194 * Convert an encoded 1 byte transport value (5 bits mantissa, 3 bits exponent)
195 * to an uplink/downlink speed value
196 *
197 * @param value the encoded 1 byte transport value
198 * @return the uplink/downlink speed value (in kbit/s)
199 */
200 static uint32_t deserialize_gw_speed(uint8_t value) {
201 uint32_t speed;
202 uint32_t exp;
203
204 if (!value) {
205 return 0;
206 }
207
208 if (value == UINT8_MAX) {
209 /* maximum value: also return maximum value */
210 return MAX_SMARTGW_SPEED;
211 }
212
213 speed = (value >> 3) + 1;
214 exp = value & 7;
215
216 while (exp != 0) {
217 speed *= 10;
218 exp--;
219 }
220 return speed;
221 }
222
223 /*
224 * macro to convert the 8-bit mantissa/exponent to a double float
225 * taken from olsr.org.
226 */
227 #define VTIME_SCALE_FACTOR 0.0625
228 #define ME_TO_DOUBLE(me) \
229 (double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
230
231 /*
232 * print a neighbor list with LQ extensions.
233 */
234 static int
235 olsr_print_lq_neighbor4(netdissect_options *ndo,
236 const u_char *msg_data, u_int hello_len)
237 {
238 const struct olsr_lq_neighbor4 *lq_neighbor;
239
240 while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
241
242 lq_neighbor = (const struct olsr_lq_neighbor4 *)msg_data;
243 if (!ND_TTEST_SIZE(lq_neighbor))
244 return (-1);
245
246 ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
247 ", neighbor-link-quality %.2f%%",
248 ipaddr_string(ndo, lq_neighbor->neighbor),
249 ((double)EXTRACT_U_1(lq_neighbor->link_quality)/2.55),
250 ((double)EXTRACT_U_1(lq_neighbor->neighbor_link_quality)/2.55));
251
252 msg_data += sizeof(struct olsr_lq_neighbor4);
253 hello_len -= sizeof(struct olsr_lq_neighbor4);
254 }
255 return (0);
256 }
257
258 static int
259 olsr_print_lq_neighbor6(netdissect_options *ndo,
260 const u_char *msg_data, u_int hello_len)
261 {
262 const struct olsr_lq_neighbor6 *lq_neighbor;
263
264 while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
265
266 lq_neighbor = (const struct olsr_lq_neighbor6 *)msg_data;
267 if (!ND_TTEST_SIZE(lq_neighbor))
268 return (-1);
269
270 ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
271 ", neighbor-link-quality %.2f%%",
272 ip6addr_string(ndo, lq_neighbor->neighbor),
273 ((double)EXTRACT_U_1(lq_neighbor->link_quality)/2.55),
274 ((double)EXTRACT_U_1(lq_neighbor->neighbor_link_quality)/2.55));
275
276 msg_data += sizeof(struct olsr_lq_neighbor6);
277 hello_len -= sizeof(struct olsr_lq_neighbor6);
278 }
279 return (0);
280 }
281
282 /*
283 * print a neighbor list.
284 */
285 static int
286 olsr_print_neighbor(netdissect_options *ndo,
287 const u_char *msg_data, u_int hello_len)
288 {
289 int neighbor;
290
291 ND_PRINT("\n\t neighbor\n\t\t");
292 neighbor = 1;
293
294 while (hello_len >= sizeof(nd_ipv4)) {
295
296 if (!ND_TTEST_LEN(msg_data, sizeof(nd_ipv4)))
297 return (-1);
298 /* print 4 neighbors per line */
299
300 ND_PRINT("%s%s", ipaddr_string(ndo, msg_data),
301 neighbor % 4 == 0 ? "\n\t\t" : " ");
302
303 msg_data += sizeof(nd_ipv4);
304 hello_len -= sizeof(nd_ipv4);
305 }
306 return (0);
307 }
308
309
310 void
311 olsr_print(netdissect_options *ndo,
312 const u_char *pptr, u_int length, int is_ipv6)
313 {
314 union {
315 const struct olsr_common *common;
316 const struct olsr_msg4 *msg4;
317 const struct olsr_msg6 *msg6;
318 const struct olsr_hello *hello;
319 const struct olsr_hello_link *hello_link;
320 const struct olsr_tc *tc;
321 const struct olsr_hna4 *hna;
322 } ptr;
323
324 u_int msg_type, msg_len, msg_tlen, hello_len;
325 uint16_t name_entry_type, name_entry_len;
326 u_int name_entry_padding;
327 uint8_t link_type, neighbor_type;
328 const u_char *tptr, *msg_data;
329
330 ndo->ndo_protocol = "olsr";
331 tptr = pptr;
332
333 if (length < sizeof(struct olsr_common)) {
334 goto trunc;
335 }
336
337 ND_TCHECK_LEN(tptr, sizeof(struct olsr_common));
338
339 ptr.common = (const struct olsr_common *)tptr;
340 length = min(length, EXTRACT_BE_U_2(ptr.common->packet_len));
341
342 ND_PRINT("OLSRv%i, seq 0x%04x, length %u",
343 (is_ipv6 == 0) ? 4 : 6,
344 EXTRACT_BE_U_2(ptr.common->packet_seq),
345 length);
346
347 tptr += sizeof(struct olsr_common);
348
349 /*
350 * In non-verbose mode, just print version.
351 */
352 if (ndo->ndo_vflag < 1) {
353 return;
354 }
355
356 while (tptr < (pptr+length)) {
357 union
358 {
359 const struct olsr_msg4 *v4;
360 const struct olsr_msg6 *v6;
361 } msgptr;
362 int msg_len_valid = 0;
363
364 if (is_ipv6)
365 {
366 ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg6));
367 msgptr.v6 = (const struct olsr_msg6 *) tptr;
368 msg_type = EXTRACT_U_1(msgptr.v6->msg_type);
369 msg_len = EXTRACT_BE_U_2(msgptr.v6->msg_len);
370 if ((msg_len >= sizeof (struct olsr_msg6))
371 && (msg_len <= length))
372 msg_len_valid = 1;
373
374 /* infinite loop check */
375 if (msg_type == 0 || msg_len == 0) {
376 return;
377 }
378
379 ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
380 "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
381 tok2str(olsr_msg_values, "Unknown", msg_type),
382 msg_type, ip6addr_string(ndo, msgptr.v6->originator),
383 EXTRACT_U_1(msgptr.v6->ttl),
384 EXTRACT_U_1(msgptr.v6->hopcount),
385 ME_TO_DOUBLE(EXTRACT_U_1(msgptr.v6->vtime)),
386 EXTRACT_BE_U_2(msgptr.v6->msg_seq),
387 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
388 if (!msg_len_valid) {
389 return;
390 }
391
392 msg_tlen = msg_len - sizeof(struct olsr_msg6);
393 msg_data = tptr + sizeof(struct olsr_msg6);
394 }
395 else /* (!is_ipv6) */
396 {
397 ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg4));
398 msgptr.v4 = (const struct olsr_msg4 *) tptr;
399 msg_type = EXTRACT_U_1(msgptr.v4->msg_type);
400 msg_len = EXTRACT_BE_U_2(msgptr.v4->msg_len);
401 if ((msg_len >= sizeof (struct olsr_msg4))
402 && (msg_len <= length))
403 msg_len_valid = 1;
404
405 /* infinite loop check */
406 if (msg_type == 0 || msg_len == 0) {
407 return;
408 }
409
410 ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
411 "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
412 tok2str(olsr_msg_values, "Unknown", msg_type),
413 msg_type, ipaddr_string(ndo, msgptr.v4->originator),
414 EXTRACT_U_1(msgptr.v4->ttl),
415 EXTRACT_U_1(msgptr.v4->hopcount),
416 ME_TO_DOUBLE(EXTRACT_U_1(msgptr.v4->vtime)),
417 EXTRACT_BE_U_2(msgptr.v4->msg_seq),
418 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
419 if (!msg_len_valid) {
420 return;
421 }
422
423 msg_tlen = msg_len - sizeof(struct olsr_msg4);
424 msg_data = tptr + sizeof(struct olsr_msg4);
425 }
426
427 switch (msg_type) {
428 case OLSR_HELLO_MSG:
429 case OLSR_HELLO_LQ_MSG:
430 if (msg_tlen < sizeof(struct olsr_hello))
431 goto trunc;
432 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hello));
433
434 ptr.hello = (const struct olsr_hello *)msg_data;
435 ND_PRINT("\n\t hello-time %.3fs, MPR willingness %u",
436 ME_TO_DOUBLE(EXTRACT_U_1(ptr.hello->htime)),
437 EXTRACT_U_1(ptr.hello->will));
438 msg_data += sizeof(struct olsr_hello);
439 msg_tlen -= sizeof(struct olsr_hello);
440
441 while (msg_tlen >= sizeof(struct olsr_hello_link)) {
442 int hello_len_valid = 0;
443
444 /*
445 * link-type.
446 */
447 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hello_link));
448
449 ptr.hello_link = (const struct olsr_hello_link *)msg_data;
450
451 hello_len = EXTRACT_BE_U_2(ptr.hello_link->len);
452 link_type = OLSR_EXTRACT_LINK_TYPE(EXTRACT_U_1(ptr.hello_link->link_code));
453 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(EXTRACT_U_1(ptr.hello_link->link_code));
454
455 if ((hello_len <= msg_tlen)
456 && (hello_len >= sizeof(struct olsr_hello_link)))
457 hello_len_valid = 1;
458
459 ND_PRINT("\n\t link-type %s, neighbor-type %s, len %u%s",
460 tok2str(olsr_link_type_values, "Unknown", link_type),
461 tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
462 hello_len,
463 (hello_len_valid == 0) ? " (invalid)" : "");
464
465 if (hello_len_valid == 0)
466 break;
467
468 msg_data += sizeof(struct olsr_hello_link);
469 msg_tlen -= sizeof(struct olsr_hello_link);
470 hello_len -= sizeof(struct olsr_hello_link);
471
472 ND_TCHECK_LEN(msg_data, hello_len);
473 if (msg_type == OLSR_HELLO_MSG) {
474 if (olsr_print_neighbor(ndo, msg_data, hello_len) == -1)
475 goto trunc;
476 } else {
477 if (is_ipv6) {
478 if (olsr_print_lq_neighbor6(ndo, msg_data, hello_len) == -1)
479 goto trunc;
480 } else {
481 if (olsr_print_lq_neighbor4(ndo, msg_data, hello_len) == -1)
482 goto trunc;
483 }
484 }
485
486 msg_data += hello_len;
487 msg_tlen -= hello_len;
488 }
489 break;
490
491 case OLSR_TC_MSG:
492 case OLSR_TC_LQ_MSG:
493 if (msg_tlen < sizeof(struct olsr_tc))
494 goto trunc;
495 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_tc));
496
497 ptr.tc = (const struct olsr_tc *)msg_data;
498 ND_PRINT("\n\t advertised neighbor seq 0x%04x",
499 EXTRACT_BE_U_2(ptr.tc->ans_seq));
500 msg_data += sizeof(struct olsr_tc);
501 msg_tlen -= sizeof(struct olsr_tc);
502
503 if (msg_type == OLSR_TC_MSG) {
504 if (olsr_print_neighbor(ndo, msg_data, msg_tlen) == -1)
505 goto trunc;
506 } else {
507 if (is_ipv6) {
508 if (olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen) == -1)
509 goto trunc;
510 } else {
511 if (olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen) == -1)
512 goto trunc;
513 }
514 }
515 break;
516
517 case OLSR_MID_MSG:
518 {
519 size_t addr_size = sizeof(nd_ipv4);
520
521 if (is_ipv6)
522 addr_size = sizeof(nd_ipv6);
523
524 while (msg_tlen >= addr_size) {
525 ND_TCHECK_LEN(msg_data, addr_size);
526 ND_PRINT("\n\t interface address %s",
527 is_ipv6 ? ip6addr_string(ndo, msg_data) :
528 ipaddr_string(ndo, msg_data));
529
530 msg_data += addr_size;
531 msg_tlen -= addr_size;
532 }
533 break;
534 }
535
536 case OLSR_HNA_MSG:
537 if (is_ipv6)
538 {
539 int i = 0;
540
541 ND_PRINT("\n\t Advertised networks (total %u)",
542 (unsigned int) (msg_tlen / sizeof(struct olsr_hna6)));
543
544 while (msg_tlen >= sizeof(struct olsr_hna6)) {
545 const struct olsr_hna6 *hna6;
546
547 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna6));
548
549 hna6 = (const struct olsr_hna6 *)msg_data;
550
551 ND_PRINT("\n\t #%i: %s/%u",
552 i, ip6addr_string(ndo, hna6->network),
553 mask62plen (hna6->mask));
554
555 msg_data += sizeof(struct olsr_hna6);
556 msg_tlen -= sizeof(struct olsr_hna6);
557 }
558 }
559 else
560 {
561 int col = 0;
562
563 ND_PRINT("\n\t Advertised networks (total %u)",
564 (unsigned int) (msg_tlen / sizeof(struct olsr_hna4)));
565
566 while (msg_tlen >= sizeof(struct olsr_hna4)) {
567 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna4));
568
569 ptr.hna = (const struct olsr_hna4 *)msg_data;
570
571 /* print 4 prefixes per line */
572 if (!ptr.hna->network[0] && !ptr.hna->network[1] &&
573 !ptr.hna->network[2] && !ptr.hna->network[3] &&
574 !ptr.hna->mask[GW_HNA_PAD] &&
575 ptr.hna->mask[GW_HNA_FLAGS]) {
576 /* smart gateway */
577 ND_PRINT("%sSmart-Gateway:%s%s%s%s%s %u/%u",
578 col == 0 ? "\n\t " : ", ", /* indent */
579 /* sgw */
580 /* LINKSPEED */
581 (ptr.hna->mask[GW_HNA_FLAGS] &
582 GW_HNA_FLAG_LINKSPEED) ? " LINKSPEED" : "",
583 /* IPV4 */
584 (ptr.hna->mask[GW_HNA_FLAGS] &
585 GW_HNA_FLAG_IPV4) ? " IPV4" : "",
586 /* IPV4-NAT */
587 (ptr.hna->mask[GW_HNA_FLAGS] &
588 GW_HNA_FLAG_IPV4_NAT) ? " IPV4-NAT" : "",
589 /* IPV6 */
590 (ptr.hna->mask[GW_HNA_FLAGS] &
591 GW_HNA_FLAG_IPV6) ? " IPV6" : "",
592 /* IPv6PREFIX */
593 (ptr.hna->mask[GW_HNA_FLAGS] &
594 GW_HNA_FLAG_IPV6PREFIX) ? " IPv6-PREFIX" : "",
595 /* uplink */
596 (ptr.hna->mask[GW_HNA_FLAGS] &
597 GW_HNA_FLAG_LINKSPEED) ?
598 deserialize_gw_speed(ptr.hna->mask[GW_HNA_UPLINK]) : 0,
599 /* downlink */
600 (ptr.hna->mask[GW_HNA_FLAGS] &
601 GW_HNA_FLAG_LINKSPEED) ?
602 deserialize_gw_speed(ptr.hna->mask[GW_HNA_DOWNLINK]) : 0
603 );
604 } else {
605 /* normal route */
606 ND_PRINT("%s%s/%u",
607 col == 0 ? "\n\t " : ", ",
608 ipaddr_string(ndo, ptr.hna->network),
609 mask2plen(EXTRACT_BE_U_4(ptr.hna->mask)));
610 }
611
612 msg_data += sizeof(struct olsr_hna4);
613 msg_tlen -= sizeof(struct olsr_hna4);
614
615 col = (col + 1) % 4;
616 }
617 }
618 break;
619
620 case OLSR_NAMESERVICE_MSG:
621 {
622 u_int name_entries;
623 u_int addr_size;
624 int name_entries_valid;
625 u_int i;
626
627 if (msg_tlen < 4)
628 goto trunc;
629 ND_TCHECK_4(msg_data);
630
631 name_entries = EXTRACT_BE_U_2(msg_data + 2);
632 addr_size = 4;
633 if (is_ipv6)
634 addr_size = 16;
635
636 name_entries_valid = 0;
637 if ((name_entries > 0)
638 && ((name_entries * (4 + addr_size)) <= msg_tlen))
639 name_entries_valid = 1;
640
641 ND_PRINT("\n\t Version %u, Entries %u%s",
642 EXTRACT_BE_U_2(msg_data),
643 name_entries, (name_entries_valid == 0) ? " (invalid)" : "");
644
645 if (name_entries_valid == 0)
646 break;
647
648 msg_data += 4;
649 msg_tlen -= 4;
650
651 for (i = 0; i < name_entries; i++) {
652 int name_entry_len_valid = 0;
653
654 if (msg_tlen < 4)
655 break;
656 ND_TCHECK_4(msg_data);
657
658 name_entry_type = EXTRACT_BE_U_2(msg_data);
659 name_entry_len = EXTRACT_BE_U_2(msg_data + 2);
660
661 msg_data += 4;
662 msg_tlen -= 4;
663
664 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
665 name_entry_len_valid = 1;
666
667 ND_PRINT("\n\t #%u: type %#06x, length %u%s",
668 (unsigned int) i, name_entry_type,
669 name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : "");
670
671 if (name_entry_len_valid == 0)
672 break;
673
674 /* 32-bit alignment */
675 name_entry_padding = 0;
676 if (name_entry_len%4 != 0)
677 name_entry_padding = 4-(name_entry_len%4);
678
679 if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
680 goto trunc;
681
682 ND_TCHECK_LEN(msg_data,
683 addr_size + name_entry_len + name_entry_padding);
684
685 if (is_ipv6)
686 ND_PRINT(", address %s, name \"",
687 ip6addr_string(ndo, msg_data));
688 else
689 ND_PRINT(", address %s, name \"",
690 ipaddr_string(ndo, msg_data));
691 (void)nd_printn(ndo, msg_data + addr_size, name_entry_len, NULL);
692 ND_PRINT("\"");
693
694 msg_data += addr_size + name_entry_len + name_entry_padding;
695 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
696 } /* for (i = 0; i < name_entries; i++) */
697 break;
698 } /* case OLSR_NAMESERVICE_MSG */
699
700 /*
701 * FIXME those are the defined messages that lack a decoder
702 * you are welcome to contribute code ;-)
703 */
704 case OLSR_POWERINFO_MSG:
705 default:
706 print_unknown_data(ndo, msg_data, "\n\t ", msg_tlen);
707 break;
708 } /* switch (msg_type) */
709 tptr += msg_len;
710 } /* while (tptr < (pptr+length)) */
711
712 return;
713
714 trunc:
715 ND_PRINT("[|olsr]");
716 }
[mirror] the TCPdump network dissector