]> The Tcpdump Group git mirrors - tcpdump/blob - print-olsr.c
projects / tcpdump / blob
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
Put "}" at beginning of line with "else" to keep a consistent style
[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 #define ND_LONGJMP_FROM_TCHECK
31 #include "netdissect.h"
32 #include "addrtoname.h"
33 #include "extract.h"
34
35 /*
36 * RFC 3626 common header
37 *
38 * 0 1 2 3
39 * 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
40 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
41 * | Packet Length | Packet Sequence Number |
42 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
43 * | Message Type | Vtime | Message Size |
44 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
45 * | Originator Address |
46 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
47 * | Time To Live | Hop Count | Message Sequence Number |
48 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
49 * | |
50 * : MESSAGE :
51 * | |
52 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
53 * | Message Type | Vtime | Message Size |
54 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
55 * | Originator Address |
56 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
57 * | Time To Live | Hop Count | Message Sequence Number |
58 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
59 * | |
60 * : MESSAGE :
61 * | |
62 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
63 * : :
64 */
65
66 struct olsr_common {
67 nd_uint16_t packet_len;
68 nd_uint16_t packet_seq;
69 };
70
71 #define OLSR_HELLO_MSG 1 /* rfc3626 */
72 #define OLSR_TC_MSG 2 /* rfc3626 */
73 #define OLSR_MID_MSG 3 /* rfc3626 */
74 #define OLSR_HNA_MSG 4 /* rfc3626 */
75 #define OLSR_POWERINFO_MSG 128
76 #define OLSR_NAMESERVICE_MSG 130
77 #define OLSR_HELLO_LQ_MSG 201 /* LQ extensions olsr.org */
78 #define OLSR_TC_LQ_MSG 202 /* LQ extensions olsr.org */
79
80 static const struct tok olsr_msg_values[] = {
81 { OLSR_HELLO_MSG, "Hello" },
82 { OLSR_TC_MSG, "TC" },
83 { OLSR_MID_MSG, "MID" },
84 { OLSR_HNA_MSG, "HNA" },
85 { OLSR_POWERINFO_MSG, "Powerinfo" },
86 { OLSR_NAMESERVICE_MSG, "Nameservice" },
87 { OLSR_HELLO_LQ_MSG, "Hello-LQ" },
88 { OLSR_TC_LQ_MSG, "TC-LQ" },
89 { 0, NULL}
90 };
91
92 struct olsr_msg4 {
93 nd_uint8_t msg_type;
94 nd_uint8_t vtime;
95 nd_uint16_t msg_len;
96 nd_ipv4 originator;
97 nd_uint8_t ttl;
98 nd_uint8_t hopcount;
99 nd_uint16_t msg_seq;
100 };
101
102 struct olsr_msg6 {
103 nd_uint8_t msg_type;
104 nd_uint8_t vtime;
105 nd_uint16_t msg_len;
106 nd_ipv6 originator;
107 nd_uint8_t ttl;
108 nd_uint8_t hopcount;
109 nd_uint16_t msg_seq;
110 };
111
112 struct olsr_hello {
113 nd_byte res[2];
114 nd_uint8_t htime;
115 nd_uint8_t will;
116 };
117
118 struct olsr_hello_link {
119 nd_uint8_t link_code;
120 nd_byte res;
121 nd_uint16_t len;
122 };
123
124 struct olsr_tc {
125 nd_uint16_t ans_seq;
126 nd_byte res[2];
127 };
128
129 struct olsr_hna4 {
130 nd_ipv4 network;
131 nd_ipv4 mask;
132 };
133
134 struct olsr_hna6 {
135 nd_ipv6 network;
136 nd_ipv6 mask;
137 };
138
139
140 /** gateway HNA flags */
141 enum gateway_hna_flags {
142 GW_HNA_FLAG_LINKSPEED = 1 << 0,
143 GW_HNA_FLAG_IPV4 = 1 << 1,
144 GW_HNA_FLAG_IPV4_NAT = 1 << 2,
145 GW_HNA_FLAG_IPV6 = 1 << 3,
146 GW_HNA_FLAG_IPV6PREFIX = 1 << 4
147 };
148
149 /** gateway HNA field byte offsets in the netmask field of the HNA */
150 enum gateway_hna_fields {
151 GW_HNA_PAD = 0,
152 GW_HNA_FLAGS = 1,
153 GW_HNA_UPLINK = 2,
154 GW_HNA_DOWNLINK = 3,
155 GW_HNA_V6PREFIXLEN = 4,
156 GW_HNA_V6PREFIX = 5
157 };
158
159
160 #define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
161 #define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
162
163 static const struct tok olsr_link_type_values[] = {
164 { 0, "Unspecified" },
165 { 1, "Asymmetric" },
166 { 2, "Symmetric" },
167 { 3, "Lost" },
168 { 0, NULL}
169 };
170
171 static const struct tok olsr_neighbor_type_values[] = {
172 { 0, "Not-Neighbor" },
173 { 1, "Symmetric" },
174 { 2, "Symmetric-MPR" },
175 { 0, NULL}
176 };
177
178 struct olsr_lq_neighbor4 {
179 nd_ipv4 neighbor;
180 nd_uint8_t link_quality;
181 nd_uint8_t neighbor_link_quality;
182 nd_byte res[2];
183 };
184
185 struct olsr_lq_neighbor6 {
186 nd_ipv6 neighbor;
187 nd_uint8_t link_quality;
188 nd_uint8_t neighbor_link_quality;
189 nd_byte res[2];
190 };
191
192 #define MAX_SMARTGW_SPEED 320000000
193
194 /**
195 * Convert an encoded 1 byte transport value (5 bits mantissa, 3 bits exponent)
196 * to an uplink/downlink speed value
197 *
198 * @param value the encoded 1 byte transport value
199 * @return the uplink/downlink speed value (in kbit/s)
200 */
201 static uint32_t deserialize_gw_speed(uint8_t value) {
202 uint32_t speed;
203 uint32_t exp;
204
205 if (!value) {
206 return 0;
207 }
208
209 if (value == UINT8_MAX) {
210 /* maximum value: also return maximum value */
211 return MAX_SMARTGW_SPEED;
212 }
213
214 speed = (value >> 3) + 1;
215 exp = value & 7;
216
217 while (exp != 0) {
218 speed *= 10;
219 exp--;
220 }
221 return speed;
222 }
223
224 /*
225 * macro to convert the 8-bit mantissa/exponent to a double float
226 * taken from olsr.org.
227 */
228 #define VTIME_SCALE_FACTOR 0.0625
229 #define ME_TO_DOUBLE(me) \
230 (double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
231
232 /*
233 * print a neighbor list with LQ extensions.
234 */
235 static void
236 olsr_print_lq_neighbor4(netdissect_options *ndo,
237 const u_char *msg_data, u_int hello_len)
238 {
239 const struct olsr_lq_neighbor4 *lq_neighbor;
240
241 while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
242
243 lq_neighbor = (const struct olsr_lq_neighbor4 *)msg_data;
244 ND_TCHECK_SIZE(lq_neighbor);
245
246 ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
247 ", neighbor-link-quality %.2f%%",
248 GET_IPADDR_STRING(lq_neighbor->neighbor),
249 ((double) GET_U_1(lq_neighbor->link_quality)/2.55),
250 ((double) GET_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 }
256
257 static void
258 olsr_print_lq_neighbor6(netdissect_options *ndo,
259 const u_char *msg_data, u_int hello_len)
260 {
261 const struct olsr_lq_neighbor6 *lq_neighbor;
262
263 while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
264
265 lq_neighbor = (const struct olsr_lq_neighbor6 *)msg_data;
266 ND_TCHECK_SIZE(lq_neighbor);
267
268 ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
269 ", neighbor-link-quality %.2f%%",
270 GET_IP6ADDR_STRING(lq_neighbor->neighbor),
271 ((double) GET_U_1(lq_neighbor->link_quality)/2.55),
272 ((double) GET_U_1(lq_neighbor->neighbor_link_quality)/2.55));
273
274 msg_data += sizeof(struct olsr_lq_neighbor6);
275 hello_len -= sizeof(struct olsr_lq_neighbor6);
276 }
277 }
278
279 /*
280 * print a neighbor list.
281 */
282 static void
283 olsr_print_neighbor(netdissect_options *ndo,
284 const u_char *msg_data, u_int hello_len)
285 {
286 int neighbor;
287
288 ND_PRINT("\n\t neighbor\n\t\t");
289 neighbor = 1;
290
291 while (hello_len >= sizeof(nd_ipv4)) {
292 /* print 4 neighbors per line */
293 ND_PRINT("%s%s", GET_IPADDR_STRING(msg_data),
294 neighbor % 4 == 0 ? "\n\t\t" : " ");
295
296 msg_data += sizeof(nd_ipv4);
297 hello_len -= sizeof(nd_ipv4);
298 }
299 }
300
301
302 void
303 olsr_print(netdissect_options *ndo,
304 const u_char *pptr, u_int length, int is_ipv6)
305 {
306 union {
307 const struct olsr_common *common;
308 const struct olsr_msg4 *msg4;
309 const struct olsr_msg6 *msg6;
310 const struct olsr_hello *hello;
311 const struct olsr_hello_link *hello_link;
312 const struct olsr_tc *tc;
313 const struct olsr_hna4 *hna;
314 } ptr;
315
316 u_int msg_type, msg_len, msg_tlen, hello_len;
317 uint16_t name_entry_type, name_entry_len;
318 u_int name_entry_padding;
319 uint8_t link_type, neighbor_type;
320 const u_char *tptr, *msg_data;
321
322 ndo->ndo_protocol = "olsr";
323 tptr = pptr;
324
325 nd_print_protocol_caps(ndo);
326 ND_PRINT("v%u", (is_ipv6) ? 6 : 4);
327
328 ND_ICHECKMSG_ZU("packet length", length, <, sizeof(struct olsr_common));
329
330 ptr.common = (const struct olsr_common *)tptr;
331 length = ND_MIN(length, GET_BE_U_2(ptr.common->packet_len));
332
333 ND_PRINT(", seq 0x%04x, length %u",
334 GET_BE_U_2(ptr.common->packet_seq),
335 length);
336
337 tptr += sizeof(struct olsr_common);
338
339 /*
340 * In non-verbose mode, just print version.
341 */
342 if (ndo->ndo_vflag < 1) {
343 return;
344 }
345
346 while (tptr < (pptr+length)) {
347 union
348 {
349 const struct olsr_msg4 *v4;
350 const struct olsr_msg6 *v6;
351 } msgptr;
352 int msg_len_valid = 0;
353
354 if (is_ipv6) {
355 ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg6));
356 msgptr.v6 = (const struct olsr_msg6 *) tptr;
357 msg_type = GET_U_1(msgptr.v6->msg_type);
358 msg_len = GET_BE_U_2(msgptr.v6->msg_len);
359 if ((msg_len >= sizeof (struct olsr_msg6))
360 && (msg_len <= length))
361 msg_len_valid = 1;
362
363 /* infinite loop check */
364 if (msg_type == 0 || msg_len == 0) {
365 return;
366 }
367
368 ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
369 "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
370 tok2str(olsr_msg_values, "Unknown", msg_type),
371 msg_type, GET_IP6ADDR_STRING(msgptr.v6->originator),
372 GET_U_1(msgptr.v6->ttl),
373 GET_U_1(msgptr.v6->hopcount),
374 ME_TO_DOUBLE(GET_U_1(msgptr.v6->vtime)),
375 GET_BE_U_2(msgptr.v6->msg_seq),
376 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
377 if (!msg_len_valid) {
378 return;
379 }
380
381 msg_tlen = msg_len - sizeof(struct olsr_msg6);
382 msg_data = tptr + sizeof(struct olsr_msg6);
383 } else { /* (!is_ipv6) */
384 ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg4));
385 msgptr.v4 = (const struct olsr_msg4 *) tptr;
386 msg_type = GET_U_1(msgptr.v4->msg_type);
387 msg_len = GET_BE_U_2(msgptr.v4->msg_len);
388 if ((msg_len >= sizeof (struct olsr_msg4))
389 && (msg_len <= length))
390 msg_len_valid = 1;
391
392 /* infinite loop check */
393 if (msg_type == 0 || msg_len == 0) {
394 return;
395 }
396
397 ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
398 "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
399 tok2str(olsr_msg_values, "Unknown", msg_type),
400 msg_type, GET_IPADDR_STRING(msgptr.v4->originator),
401 GET_U_1(msgptr.v4->ttl),
402 GET_U_1(msgptr.v4->hopcount),
403 ME_TO_DOUBLE(GET_U_1(msgptr.v4->vtime)),
404 GET_BE_U_2(msgptr.v4->msg_seq),
405 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
406 if (!msg_len_valid) {
407 return;
408 }
409
410 msg_tlen = msg_len - sizeof(struct olsr_msg4);
411 msg_data = tptr + sizeof(struct olsr_msg4);
412 }
413
414 switch (msg_type) {
415 case OLSR_HELLO_MSG:
416 case OLSR_HELLO_LQ_MSG:
417 ND_ICHECKMSG_ZU("message length", msg_tlen, <,
418 sizeof(struct olsr_hello));
419
420 ptr.hello = (const struct olsr_hello *)msg_data;
421 ND_PRINT("\n\t hello-time %.3fs, MPR willingness %u",
422 ME_TO_DOUBLE(GET_U_1(ptr.hello->htime)),
423 GET_U_1(ptr.hello->will));
424 msg_data += sizeof(struct olsr_hello);
425 msg_tlen -= sizeof(struct olsr_hello);
426
427 while (msg_tlen >= sizeof(struct olsr_hello_link)) {
428 int hello_len_valid = 0;
429
430 /*
431 * link-type.
432 */
433 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hello_link));
434
435 ptr.hello_link = (const struct olsr_hello_link *)msg_data;
436
437 hello_len = GET_BE_U_2(ptr.hello_link->len);
438 link_type = OLSR_EXTRACT_LINK_TYPE(GET_U_1(ptr.hello_link->link_code));
439 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(GET_U_1(ptr.hello_link->link_code));
440
441 if ((hello_len <= msg_tlen)
442 && (hello_len >= sizeof(struct olsr_hello_link)))
443 hello_len_valid = 1;
444
445 ND_PRINT("\n\t link-type %s, neighbor-type %s, len %u%s",
446 tok2str(olsr_link_type_values, "Unknown", link_type),
447 tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
448 hello_len,
449 (hello_len_valid == 0) ? " (invalid)" : "");
450
451 if (hello_len_valid == 0)
452 break;
453
454 msg_data += sizeof(struct olsr_hello_link);
455 msg_tlen -= sizeof(struct olsr_hello_link);
456 hello_len -= sizeof(struct olsr_hello_link);
457
458 ND_TCHECK_LEN(msg_data, hello_len);
459 if (msg_type == OLSR_HELLO_MSG) {
460 olsr_print_neighbor(ndo, msg_data, hello_len);
461 } else {
462 if (is_ipv6) {
463 olsr_print_lq_neighbor6(ndo, msg_data, hello_len);
464 } else {
465 olsr_print_lq_neighbor4(ndo, msg_data, hello_len);
466 }
467 }
468
469 msg_data += hello_len;
470 msg_tlen -= hello_len;
471 }
472 break;
473
474 case OLSR_TC_MSG:
475 case OLSR_TC_LQ_MSG:
476 ND_ICHECKMSG_ZU("message length", msg_tlen, <,
477 sizeof(struct olsr_tc));
478 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_tc));
479
480 ptr.tc = (const struct olsr_tc *)msg_data;
481 ND_PRINT("\n\t advertised neighbor seq 0x%04x",
482 GET_BE_U_2(ptr.tc->ans_seq));
483 msg_data += sizeof(struct olsr_tc);
484 msg_tlen -= sizeof(struct olsr_tc);
485
486 if (msg_type == OLSR_TC_MSG) {
487 olsr_print_neighbor(ndo, msg_data, msg_tlen);
488 } else {
489 if (is_ipv6) {
490 olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen);
491 } else {
492 olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen);
493 }
494 }
495 break;
496
497 case OLSR_MID_MSG:
498 {
499 u_int addr_size = (u_int)sizeof(nd_ipv4);
500
501 if (is_ipv6)
502 addr_size = (u_int)sizeof(nd_ipv6);
503
504 while (msg_tlen >= addr_size) {
505 ND_TCHECK_LEN(msg_data, addr_size);
506 ND_PRINT("\n\t interface address %s",
507 is_ipv6 ? GET_IP6ADDR_STRING(msg_data) :
508 GET_IPADDR_STRING(msg_data));
509
510 msg_data += addr_size;
511 msg_tlen -= addr_size;
512 }
513 break;
514 }
515
516 case OLSR_HNA_MSG:
517 if (is_ipv6) {
518 int i = 0;
519
520 ND_PRINT("\n\t Advertised networks (total %u)",
521 (unsigned int) (msg_tlen / sizeof(struct olsr_hna6)));
522
523 while (msg_tlen >= sizeof(struct olsr_hna6)) {
524 const struct olsr_hna6 *hna6;
525
526 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna6));
527
528 hna6 = (const struct olsr_hna6 *)msg_data;
529
530 ND_PRINT("\n\t #%i: %s/%u",
531 i, GET_IP6ADDR_STRING(hna6->network),
532 mask62plen (hna6->mask));
533
534 msg_data += sizeof(struct olsr_hna6);
535 msg_tlen -= sizeof(struct olsr_hna6);
536 }
537 } else {
538 int col = 0;
539
540 ND_PRINT("\n\t Advertised networks (total %u)",
541 (unsigned int) (msg_tlen / sizeof(struct olsr_hna4)));
542
543 while (msg_tlen >= sizeof(struct olsr_hna4)) {
544 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna4));
545
546 ptr.hna = (const struct olsr_hna4 *)msg_data;
547
548 /* print 4 prefixes per line */
549 if (!ptr.hna->network[0] && !ptr.hna->network[1] &&
550 !ptr.hna->network[2] && !ptr.hna->network[3] &&
551 !ptr.hna->mask[GW_HNA_PAD] &&
552 ptr.hna->mask[GW_HNA_FLAGS]) {
553 /* smart gateway */
554 ND_PRINT("%sSmart-Gateway:%s%s%s%s%s %u/%u",
555 col == 0 ? "\n\t " : ", ", /* indent */
556 /* sgw */
557 /* LINKSPEED */
558 (ptr.hna->mask[GW_HNA_FLAGS] &
559 GW_HNA_FLAG_LINKSPEED) ? " LINKSPEED" : "",
560 /* IPV4 */
561 (ptr.hna->mask[GW_HNA_FLAGS] &
562 GW_HNA_FLAG_IPV4) ? " IPV4" : "",
563 /* IPV4-NAT */
564 (ptr.hna->mask[GW_HNA_FLAGS] &
565 GW_HNA_FLAG_IPV4_NAT) ? " IPV4-NAT" : "",
566 /* IPV6 */
567 (ptr.hna->mask[GW_HNA_FLAGS] &
568 GW_HNA_FLAG_IPV6) ? " IPV6" : "",
569 /* IPv6PREFIX */
570 (ptr.hna->mask[GW_HNA_FLAGS] &
571 GW_HNA_FLAG_IPV6PREFIX) ? " IPv6-PREFIX" : "",
572 /* uplink */
573 (ptr.hna->mask[GW_HNA_FLAGS] &
574 GW_HNA_FLAG_LINKSPEED) ?
575 deserialize_gw_speed(ptr.hna->mask[GW_HNA_UPLINK]) : 0,
576 /* downlink */
577 (ptr.hna->mask[GW_HNA_FLAGS] &
578 GW_HNA_FLAG_LINKSPEED) ?
579 deserialize_gw_speed(ptr.hna->mask[GW_HNA_DOWNLINK]) : 0
580 );
581 } else {
582 /* normal route */
583 ND_PRINT("%s%s/%u",
584 col == 0 ? "\n\t " : ", ",
585 GET_IPADDR_STRING(ptr.hna->network),
586 mask2plen(GET_BE_U_4(ptr.hna->mask)));
587 }
588
589 msg_data += sizeof(struct olsr_hna4);
590 msg_tlen -= sizeof(struct olsr_hna4);
591
592 col = (col + 1) % 4;
593 }
594 }
595 break;
596
597 case OLSR_NAMESERVICE_MSG:
598 {
599 u_int name_entries;
600 u_int addr_size;
601 int name_entries_valid;
602 u_int i;
603
604 ND_ICHECKMSG_U("message length", msg_tlen, <, 4);
605
606 name_entries = GET_BE_U_2(msg_data + 2);
607 addr_size = 4;
608 if (is_ipv6)
609 addr_size = 16;
610
611 name_entries_valid = 0;
612 if ((name_entries > 0)
613 && ((name_entries * (4 + addr_size)) <= msg_tlen))
614 name_entries_valid = 1;
615
616 ND_PRINT("\n\t Version %u, Entries %u%s",
617 GET_BE_U_2(msg_data),
618 name_entries, (name_entries_valid == 0) ? " (invalid)" : "");
619
620 if (name_entries_valid == 0)
621 break;
622
623 msg_data += 4;
624 msg_tlen -= 4;
625
626 for (i = 0; i < name_entries; i++) {
627 int name_entry_len_valid = 0;
628
629 if (msg_tlen < 4)
630 break;
631
632 name_entry_type = GET_BE_U_2(msg_data);
633 name_entry_len = GET_BE_U_2(msg_data + 2);
634
635 msg_data += 4;
636 msg_tlen -= 4;
637
638 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
639 name_entry_len_valid = 1;
640
641 ND_PRINT("\n\t #%u: type %#06x, length %u%s",
642 (unsigned int) i, name_entry_type,
643 name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : "");
644
645 if (name_entry_len_valid == 0)
646 break;
647
648 /* 32-bit alignment */
649 name_entry_padding = 0;
650 if (name_entry_len%4 != 0)
651 name_entry_padding = 4-(name_entry_len%4);
652
653 ND_ICHECKMSG_U("name entry length", msg_tlen, <,
654 addr_size + name_entry_len + name_entry_padding);
655
656 ND_TCHECK_LEN(msg_data,
657 addr_size + name_entry_len + name_entry_padding);
658
659 if (is_ipv6)
660 ND_PRINT(", address %s, name \"",
661 GET_IP6ADDR_STRING(msg_data));
662 else
663 ND_PRINT(", address %s, name \"",
664 GET_IPADDR_STRING(msg_data));
665 nd_printjn(ndo, msg_data + addr_size, name_entry_len);
666 ND_PRINT("\"");
667
668 msg_data += addr_size + name_entry_len + name_entry_padding;
669 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
670 } /* for (i = 0; i < name_entries; i++) */
671 break;
672 } /* case OLSR_NAMESERVICE_MSG */
673
674 /*
675 * FIXME those are the defined messages that lack a decoder
676 * you are welcome to contribute code ;-)
677 */
678 case OLSR_POWERINFO_MSG:
679 default:
680 print_unknown_data(ndo, msg_data, "\n\t ", msg_tlen);
681 break;
682 } /* switch (msg_type) */
683 tptr += msg_len;
684 } /* while (tptr < (pptr+length)) */
685
686 return;
687
688 invalid:
689 nd_print_invalid(ndo);
690 }
[mirror] the TCPdump network dissector