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Include <fcntl.h> unconditionally
[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 ND_TCHECK_SIZE(lq_neighbor);
244
245 ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
246 ", neighbor-link-quality %.2f%%",
247 GET_IPADDR_STRING(lq_neighbor->neighbor),
248 ((double) GET_U_1(lq_neighbor->link_quality)/2.55),
249 ((double) GET_U_1(lq_neighbor->neighbor_link_quality)/2.55));
250
251 msg_data += sizeof(struct olsr_lq_neighbor4);
252 hello_len -= sizeof(struct olsr_lq_neighbor4);
253 }
254 return (0);
255 trunc:
256 return -1;
257 }
258
259 static int
260 olsr_print_lq_neighbor6(netdissect_options *ndo,
261 const u_char *msg_data, u_int hello_len)
262 {
263 const struct olsr_lq_neighbor6 *lq_neighbor;
264
265 while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
266
267 lq_neighbor = (const struct olsr_lq_neighbor6 *)msg_data;
268 ND_TCHECK_SIZE(lq_neighbor);
269
270 ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
271 ", neighbor-link-quality %.2f%%",
272 GET_IP6ADDR_STRING(lq_neighbor->neighbor),
273 ((double) GET_U_1(lq_neighbor->link_quality)/2.55),
274 ((double) GET_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 trunc:
281 return -1;
282 }
283
284 /*
285 * print a neighbor list.
286 */
287 static int
288 olsr_print_neighbor(netdissect_options *ndo,
289 const u_char *msg_data, u_int hello_len)
290 {
291 int neighbor;
292
293 ND_PRINT("\n\t neighbor\n\t\t");
294 neighbor = 1;
295
296 while (hello_len >= sizeof(nd_ipv4)) {
297 /* print 4 neighbors per line */
298 ND_PRINT("%s%s", GET_IPADDR_STRING(msg_data),
299 neighbor % 4 == 0 ? "\n\t\t" : " ");
300
301 msg_data += sizeof(nd_ipv4);
302 hello_len -= sizeof(nd_ipv4);
303 }
304 return (0);
305 }
306
307
308 void
309 olsr_print(netdissect_options *ndo,
310 const u_char *pptr, u_int length, int is_ipv6)
311 {
312 union {
313 const struct olsr_common *common;
314 const struct olsr_msg4 *msg4;
315 const struct olsr_msg6 *msg6;
316 const struct olsr_hello *hello;
317 const struct olsr_hello_link *hello_link;
318 const struct olsr_tc *tc;
319 const struct olsr_hna4 *hna;
320 } ptr;
321
322 u_int msg_type, msg_len, msg_tlen, hello_len;
323 uint16_t name_entry_type, name_entry_len;
324 u_int name_entry_padding;
325 uint8_t link_type, neighbor_type;
326 const u_char *tptr, *msg_data;
327
328 ndo->ndo_protocol = "olsr";
329 tptr = pptr;
330
331 nd_print_protocol_caps(ndo);
332 ND_PRINT("v%u", (is_ipv6) ? 6 : 4);
333
334 if (length < sizeof(struct olsr_common)) {
335 goto trunc;
336 }
337
338 ND_TCHECK_LEN(tptr, sizeof(struct olsr_common));
339
340 ptr.common = (const struct olsr_common *)tptr;
341 length = ND_MIN(length, GET_BE_U_2(ptr.common->packet_len));
342
343 ND_PRINT(", seq 0x%04x, length %u",
344 GET_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 ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg6));
366 msgptr.v6 = (const struct olsr_msg6 *) tptr;
367 msg_type = GET_U_1(msgptr.v6->msg_type);
368 msg_len = GET_BE_U_2(msgptr.v6->msg_len);
369 if ((msg_len >= sizeof (struct olsr_msg6))
370 && (msg_len <= length))
371 msg_len_valid = 1;
372
373 /* infinite loop check */
374 if (msg_type == 0 || msg_len == 0) {
375 return;
376 }
377
378 ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
379 "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
380 tok2str(olsr_msg_values, "Unknown", msg_type),
381 msg_type, GET_IP6ADDR_STRING(msgptr.v6->originator),
382 GET_U_1(msgptr.v6->ttl),
383 GET_U_1(msgptr.v6->hopcount),
384 ME_TO_DOUBLE(GET_U_1(msgptr.v6->vtime)),
385 GET_BE_U_2(msgptr.v6->msg_seq),
386 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
387 if (!msg_len_valid) {
388 return;
389 }
390
391 msg_tlen = msg_len - sizeof(struct olsr_msg6);
392 msg_data = tptr + sizeof(struct olsr_msg6);
393 } else { /* (!is_ipv6) */
394 ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg4));
395 msgptr.v4 = (const struct olsr_msg4 *) tptr;
396 msg_type = GET_U_1(msgptr.v4->msg_type);
397 msg_len = GET_BE_U_2(msgptr.v4->msg_len);
398 if ((msg_len >= sizeof (struct olsr_msg4))
399 && (msg_len <= length))
400 msg_len_valid = 1;
401
402 /* infinite loop check */
403 if (msg_type == 0 || msg_len == 0) {
404 return;
405 }
406
407 ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
408 "\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
409 tok2str(olsr_msg_values, "Unknown", msg_type),
410 msg_type, GET_IPADDR_STRING(msgptr.v4->originator),
411 GET_U_1(msgptr.v4->ttl),
412 GET_U_1(msgptr.v4->hopcount),
413 ME_TO_DOUBLE(GET_U_1(msgptr.v4->vtime)),
414 GET_BE_U_2(msgptr.v4->msg_seq),
415 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
416 if (!msg_len_valid) {
417 return;
418 }
419
420 msg_tlen = msg_len - sizeof(struct olsr_msg4);
421 msg_data = tptr + sizeof(struct olsr_msg4);
422 }
423
424 switch (msg_type) {
425 case OLSR_HELLO_MSG:
426 case OLSR_HELLO_LQ_MSG:
427 if (msg_tlen < sizeof(struct olsr_hello))
428 goto trunc;
429 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hello));
430
431 ptr.hello = (const struct olsr_hello *)msg_data;
432 ND_PRINT("\n\t hello-time %.3fs, MPR willingness %u",
433 ME_TO_DOUBLE(GET_U_1(ptr.hello->htime)),
434 GET_U_1(ptr.hello->will));
435 msg_data += sizeof(struct olsr_hello);
436 msg_tlen -= sizeof(struct olsr_hello);
437
438 while (msg_tlen >= sizeof(struct olsr_hello_link)) {
439 int hello_len_valid = 0;
440
441 /*
442 * link-type.
443 */
444 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hello_link));
445
446 ptr.hello_link = (const struct olsr_hello_link *)msg_data;
447
448 hello_len = GET_BE_U_2(ptr.hello_link->len);
449 link_type = OLSR_EXTRACT_LINK_TYPE(GET_U_1(ptr.hello_link->link_code));
450 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(GET_U_1(ptr.hello_link->link_code));
451
452 if ((hello_len <= msg_tlen)
453 && (hello_len >= sizeof(struct olsr_hello_link)))
454 hello_len_valid = 1;
455
456 ND_PRINT("\n\t link-type %s, neighbor-type %s, len %u%s",
457 tok2str(olsr_link_type_values, "Unknown", link_type),
458 tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
459 hello_len,
460 (hello_len_valid == 0) ? " (invalid)" : "");
461
462 if (hello_len_valid == 0)
463 break;
464
465 msg_data += sizeof(struct olsr_hello_link);
466 msg_tlen -= sizeof(struct olsr_hello_link);
467 hello_len -= sizeof(struct olsr_hello_link);
468
469 ND_TCHECK_LEN(msg_data, hello_len);
470 if (msg_type == OLSR_HELLO_MSG) {
471 if (olsr_print_neighbor(ndo, msg_data, hello_len) == -1)
472 goto trunc;
473 } else {
474 if (is_ipv6) {
475 if (olsr_print_lq_neighbor6(ndo, msg_data, hello_len) == -1)
476 goto trunc;
477 } else {
478 if (olsr_print_lq_neighbor4(ndo, msg_data, hello_len) == -1)
479 goto trunc;
480 }
481 }
482
483 msg_data += hello_len;
484 msg_tlen -= hello_len;
485 }
486 break;
487
488 case OLSR_TC_MSG:
489 case OLSR_TC_LQ_MSG:
490 if (msg_tlen < sizeof(struct olsr_tc))
491 goto trunc;
492 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_tc));
493
494 ptr.tc = (const struct olsr_tc *)msg_data;
495 ND_PRINT("\n\t advertised neighbor seq 0x%04x",
496 GET_BE_U_2(ptr.tc->ans_seq));
497 msg_data += sizeof(struct olsr_tc);
498 msg_tlen -= sizeof(struct olsr_tc);
499
500 if (msg_type == OLSR_TC_MSG) {
501 if (olsr_print_neighbor(ndo, msg_data, msg_tlen) == -1)
502 goto trunc;
503 } else {
504 if (is_ipv6) {
505 if (olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen) == -1)
506 goto trunc;
507 } else {
508 if (olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen) == -1)
509 goto trunc;
510 }
511 }
512 break;
513
514 case OLSR_MID_MSG:
515 {
516 u_int addr_size = (u_int)sizeof(nd_ipv4);
517
518 if (is_ipv6)
519 addr_size = (u_int)sizeof(nd_ipv6);
520
521 while (msg_tlen >= addr_size) {
522 ND_TCHECK_LEN(msg_data, addr_size);
523 ND_PRINT("\n\t interface address %s",
524 is_ipv6 ? GET_IP6ADDR_STRING(msg_data) :
525 GET_IPADDR_STRING(msg_data));
526
527 msg_data += addr_size;
528 msg_tlen -= addr_size;
529 }
530 break;
531 }
532
533 case OLSR_HNA_MSG:
534 if (is_ipv6) {
535 int i = 0;
536
537 ND_PRINT("\n\t Advertised networks (total %u)",
538 (unsigned int) (msg_tlen / sizeof(struct olsr_hna6)));
539
540 while (msg_tlen >= sizeof(struct olsr_hna6)) {
541 const struct olsr_hna6 *hna6;
542
543 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna6));
544
545 hna6 = (const struct olsr_hna6 *)msg_data;
546
547 ND_PRINT("\n\t #%i: %s/%u",
548 i, GET_IP6ADDR_STRING(hna6->network),
549 mask62plen (hna6->mask));
550
551 msg_data += sizeof(struct olsr_hna6);
552 msg_tlen -= sizeof(struct olsr_hna6);
553 }
554 } else {
555 int col = 0;
556
557 ND_PRINT("\n\t Advertised networks (total %u)",
558 (unsigned int) (msg_tlen / sizeof(struct olsr_hna4)));
559
560 while (msg_tlen >= sizeof(struct olsr_hna4)) {
561 ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna4));
562
563 ptr.hna = (const struct olsr_hna4 *)msg_data;
564
565 /* print 4 prefixes per line */
566 if (!ptr.hna->network[0] && !ptr.hna->network[1] &&
567 !ptr.hna->network[2] && !ptr.hna->network[3] &&
568 !ptr.hna->mask[GW_HNA_PAD] &&
569 ptr.hna->mask[GW_HNA_FLAGS]) {
570 /* smart gateway */
571 ND_PRINT("%sSmart-Gateway:%s%s%s%s%s %u/%u",
572 col == 0 ? "\n\t " : ", ", /* indent */
573 /* sgw */
574 /* LINKSPEED */
575 (ptr.hna->mask[GW_HNA_FLAGS] &
576 GW_HNA_FLAG_LINKSPEED) ? " LINKSPEED" : "",
577 /* IPV4 */
578 (ptr.hna->mask[GW_HNA_FLAGS] &
579 GW_HNA_FLAG_IPV4) ? " IPV4" : "",
580 /* IPV4-NAT */
581 (ptr.hna->mask[GW_HNA_FLAGS] &
582 GW_HNA_FLAG_IPV4_NAT) ? " IPV4-NAT" : "",
583 /* IPV6 */
584 (ptr.hna->mask[GW_HNA_FLAGS] &
585 GW_HNA_FLAG_IPV6) ? " IPV6" : "",
586 /* IPv6PREFIX */
587 (ptr.hna->mask[GW_HNA_FLAGS] &
588 GW_HNA_FLAG_IPV6PREFIX) ? " IPv6-PREFIX" : "",
589 /* uplink */
590 (ptr.hna->mask[GW_HNA_FLAGS] &
591 GW_HNA_FLAG_LINKSPEED) ?
592 deserialize_gw_speed(ptr.hna->mask[GW_HNA_UPLINK]) : 0,
593 /* downlink */
594 (ptr.hna->mask[GW_HNA_FLAGS] &
595 GW_HNA_FLAG_LINKSPEED) ?
596 deserialize_gw_speed(ptr.hna->mask[GW_HNA_DOWNLINK]) : 0
597 );
598 } else {
599 /* normal route */
600 ND_PRINT("%s%s/%u",
601 col == 0 ? "\n\t " : ", ",
602 GET_IPADDR_STRING(ptr.hna->network),
603 mask2plen(GET_BE_U_4(ptr.hna->mask)));
604 }
605
606 msg_data += sizeof(struct olsr_hna4);
607 msg_tlen -= sizeof(struct olsr_hna4);
608
609 col = (col + 1) % 4;
610 }
611 }
612 break;
613
614 case OLSR_NAMESERVICE_MSG:
615 {
616 u_int name_entries;
617 u_int addr_size;
618 int name_entries_valid;
619 u_int i;
620
621 if (msg_tlen < 4)
622 goto trunc;
623
624 name_entries = GET_BE_U_2(msg_data + 2);
625 addr_size = 4;
626 if (is_ipv6)
627 addr_size = 16;
628
629 name_entries_valid = 0;
630 if ((name_entries > 0)
631 && ((name_entries * (4 + addr_size)) <= msg_tlen))
632 name_entries_valid = 1;
633
634 ND_PRINT("\n\t Version %u, Entries %u%s",
635 GET_BE_U_2(msg_data),
636 name_entries, (name_entries_valid == 0) ? " (invalid)" : "");
637
638 if (name_entries_valid == 0)
639 break;
640
641 msg_data += 4;
642 msg_tlen -= 4;
643
644 for (i = 0; i < name_entries; i++) {
645 int name_entry_len_valid = 0;
646
647 if (msg_tlen < 4)
648 break;
649
650 name_entry_type = GET_BE_U_2(msg_data);
651 name_entry_len = GET_BE_U_2(msg_data + 2);
652
653 msg_data += 4;
654 msg_tlen -= 4;
655
656 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
657 name_entry_len_valid = 1;
658
659 ND_PRINT("\n\t #%u: type %#06x, length %u%s",
660 (unsigned int) i, name_entry_type,
661 name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : "");
662
663 if (name_entry_len_valid == 0)
664 break;
665
666 /* 32-bit alignment */
667 name_entry_padding = 0;
668 if (name_entry_len%4 != 0)
669 name_entry_padding = 4-(name_entry_len%4);
670
671 if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
672 goto trunc;
673
674 ND_TCHECK_LEN(msg_data,
675 addr_size + name_entry_len + name_entry_padding);
676
677 if (is_ipv6)
678 ND_PRINT(", address %s, name \"",
679 GET_IP6ADDR_STRING(msg_data));
680 else
681 ND_PRINT(", address %s, name \"",
682 GET_IPADDR_STRING(msg_data));
683 (void)nd_printn(ndo, msg_data + addr_size, name_entry_len, NULL);
684 ND_PRINT("\"");
685
686 msg_data += addr_size + name_entry_len + name_entry_padding;
687 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
688 } /* for (i = 0; i < name_entries; i++) */
689 break;
690 } /* case OLSR_NAMESERVICE_MSG */
691
692 /*
693 * FIXME those are the defined messages that lack a decoder
694 * you are welcome to contribute code ;-)
695 */
696 case OLSR_POWERINFO_MSG:
697 default:
698 print_unknown_data(ndo, msg_data, "\n\t ", msg_tlen);
699 break;
700 } /* switch (msg_type) */
701 tptr += msg_len;
702 } /* while (tptr < (pptr+length)) */
703
704 return;
705
706 trunc:
707 nd_print_trunc(ndo);
708 }
[mirror] the TCPdump network dissector