2 * Copyright (c) 1998-2007 The TCPDUMP project
3 * Copyright (c) 2009 Florian Forster
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.
16 * Optimized Link State Protocl (OLSR) as per rfc3626
18 * Original code by Hannes Gredler <hannes@juniper.net>
19 * IPv6 additions by Florian Forster <octo at verplant.org>
22 #define NETDISSECT_REWORKED
27 #include <tcpdump-stdinc.h>
29 #include "interface.h"
30 #include "addrtoname.h"
34 * RFC 3626 common header
37 * 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
38 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
39 * | Packet Length | Packet Sequence Number |
40 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
41 * | Message Type | Vtime | Message Size |
42 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
43 * | Originator Address |
44 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
45 * | Time To Live | Hop Count | Message Sequence Number |
46 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
51 * | Message Type | Vtime | Message Size |
52 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
53 * | Originator Address |
54 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
55 * | Time To Live | Hop Count | Message Sequence Number |
56 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
60 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
65 uint8_t packet_len[2];
66 uint8_t packet_seq[2];
69 #define OLSR_HELLO_MSG 1 /* rfc3626 */
70 #define OLSR_TC_MSG 2 /* rfc3626 */
71 #define OLSR_MID_MSG 3 /* rfc3626 */
72 #define OLSR_HNA_MSG 4 /* rfc3626 */
73 #define OLSR_POWERINFO_MSG 128
74 #define OLSR_NAMESERVICE_MSG 130
75 #define OLSR_HELLO_LQ_MSG 201 /* LQ extensions olsr.org */
76 #define OLSR_TC_LQ_MSG 202 /* LQ extensions olsr.org */
78 static const struct tok olsr_msg_values[] = {
79 { OLSR_HELLO_MSG, "Hello" },
80 { OLSR_TC_MSG, "TC" },
81 { OLSR_MID_MSG, "MID" },
82 { OLSR_HNA_MSG, "HNA" },
83 { OLSR_POWERINFO_MSG, "Powerinfo" },
84 { OLSR_NAMESERVICE_MSG, "Nameservice" },
85 { OLSR_HELLO_LQ_MSG, "Hello-LQ" },
86 { OLSR_TC_LQ_MSG, "TC-LQ" },
94 uint8_t originator[4];
104 uint8_t originator[16];
116 struct olsr_hello_link {
138 #define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
139 #define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
141 static const struct tok olsr_link_type_values[] = {
142 { 0, "Unspecified" },
149 static const struct tok olsr_neighbor_type_values[] = {
150 { 0, "Not-Neighbor" },
152 { 2, "Symmetric-MPR" },
156 struct olsr_lq_neighbor4 {
158 uint8_t link_quality;
159 uint8_t neighbor_link_quality;
163 struct olsr_lq_neighbor6 {
164 uint8_t neighbor[16];
165 uint8_t link_quality;
166 uint8_t neighbor_link_quality;
171 * macro to convert the 8-bit mantissa/exponent to a double float
172 * taken from olsr.org.
174 #define VTIME_SCALE_FACTOR 0.0625
175 #define ME_TO_DOUBLE(me) \
176 (double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
179 * print a neighbor list with LQ extensions.
182 olsr_print_lq_neighbor4(netdissect_options *ndo,
183 const u_char *msg_data, u_int hello_len)
185 struct olsr_lq_neighbor4 *lq_neighbor;
187 while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
189 lq_neighbor = (struct olsr_lq_neighbor4 *)msg_data;
190 if (!ND_TTEST(*lq_neighbor))
193 ND_PRINT((ndo, "\n\t neighbor %s, link-quality %.2lf%%"
194 ", neighbor-link-quality %.2lf%%",
195 ipaddr_string(ndo, lq_neighbor->neighbor),
196 ((double)lq_neighbor->link_quality/2.55),
197 ((double)lq_neighbor->neighbor_link_quality/2.55)));
199 msg_data += sizeof(struct olsr_lq_neighbor4);
200 hello_len -= sizeof(struct olsr_lq_neighbor4);
207 olsr_print_lq_neighbor6(netdissect_options *ndo,
208 const u_char *msg_data, u_int hello_len)
210 struct olsr_lq_neighbor6 *lq_neighbor;
212 while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
214 lq_neighbor = (struct olsr_lq_neighbor6 *)msg_data;
215 if (!ND_TTEST(*lq_neighbor))
218 ND_PRINT((ndo, "\n\t neighbor %s, link-quality %.2lf%%"
219 ", neighbor-link-quality %.2lf%%",
220 ip6addr_string(ndo, lq_neighbor->neighbor),
221 ((double)lq_neighbor->link_quality/2.55),
222 ((double)lq_neighbor->neighbor_link_quality/2.55)));
224 msg_data += sizeof(struct olsr_lq_neighbor6);
225 hello_len -= sizeof(struct olsr_lq_neighbor6);
232 * print a neighbor list.
235 olsr_print_neighbor(netdissect_options *ndo,
236 const u_char *msg_data, u_int hello_len)
240 ND_PRINT((ndo, "\n\t neighbor\n\t\t"));
243 while (hello_len >= sizeof(struct in_addr)) {
245 if (!ND_TTEST2(*msg_data, sizeof(struct in_addr)))
247 /* print 4 neighbors per line */
249 ND_PRINT((ndo, "%s%s", ipaddr_string(ndo, msg_data),
250 neighbor % 4 == 0 ? "\n\t\t" : " "));
252 msg_data += sizeof(struct in_addr);
253 hello_len -= sizeof(struct in_addr);
260 olsr_print(netdissect_options *ndo,
261 const u_char *pptr, u_int length, int is_ipv6)
264 const struct olsr_common *common;
265 const struct olsr_msg4 *msg4;
266 const struct olsr_msg6 *msg6;
267 const struct olsr_hello *hello;
268 const struct olsr_hello_link *hello_link;
269 const struct olsr_tc *tc;
270 const struct olsr_hna4 *hna;
273 u_int msg_type, msg_len, msg_tlen, hello_len;
274 uint16_t name_entry_type, name_entry_len;
275 u_int name_entry_padding;
276 uint8_t link_type, neighbor_type;
277 const u_char *tptr, *msg_data;
281 if (length < sizeof(struct olsr_common)) {
285 ND_TCHECK2(*tptr, sizeof(struct olsr_common));
287 ptr.common = (struct olsr_common *)tptr;
288 length = min(length, EXTRACT_16BITS(ptr.common->packet_len));
290 ND_PRINT((ndo, "OLSRv%i, seq 0x%04x, length %u",
291 (is_ipv6 == 0) ? 4 : 6,
292 EXTRACT_16BITS(ptr.common->packet_seq),
295 tptr += sizeof(struct olsr_common);
298 * In non-verbose mode, just print version.
300 if (ndo->ndo_vflag < 1) {
304 while (tptr < (pptr+length)) {
307 struct olsr_msg4 *v4;
308 struct olsr_msg6 *v6;
310 int msg_len_valid = 0;
312 ND_TCHECK2(*tptr, sizeof(struct olsr_msg4));
317 msgptr.v6 = (struct olsr_msg6 *) tptr;
318 msg_type = msgptr.v6->msg_type;
319 msg_len = EXTRACT_16BITS(msgptr.v6->msg_len);
320 if ((msg_len >= sizeof (struct olsr_msg6))
321 && (msg_len <= length))
324 /* infinite loop check */
325 if (msg_type == 0 || msg_len == 0) {
329 ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
330 "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
331 tok2str(olsr_msg_values, "Unknown", msg_type),
332 msg_type, ip6addr_string(ndo, msgptr.v6->originator),
335 ME_TO_DOUBLE(msgptr.v6->vtime),
336 EXTRACT_16BITS(msgptr.v6->msg_seq),
337 msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
338 if (!msg_len_valid) {
342 msg_tlen = msg_len - sizeof(struct olsr_msg6);
343 msg_data = tptr + sizeof(struct olsr_msg6);
345 else /* (!is_ipv6) */
348 msgptr.v4 = (struct olsr_msg4 *) tptr;
349 msg_type = msgptr.v4->msg_type;
350 msg_len = EXTRACT_16BITS(msgptr.v4->msg_len);
351 if ((msg_len >= sizeof (struct olsr_msg4))
352 && (msg_len <= length))
355 /* infinite loop check */
356 if (msg_type == 0 || msg_len == 0) {
360 ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
361 "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
362 tok2str(olsr_msg_values, "Unknown", msg_type),
363 msg_type, ipaddr_string(ndo, msgptr.v4->originator),
366 ME_TO_DOUBLE(msgptr.v4->vtime),
367 EXTRACT_16BITS(msgptr.v4->msg_seq),
368 msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
369 if (!msg_len_valid) {
373 msg_tlen = msg_len - sizeof(struct olsr_msg4);
374 msg_data = tptr + sizeof(struct olsr_msg4);
379 case OLSR_HELLO_LQ_MSG:
380 if (msg_tlen < sizeof(struct olsr_hello))
382 ND_TCHECK2(*msg_data, sizeof(struct olsr_hello));
384 ptr.hello = (struct olsr_hello *)msg_data;
385 ND_PRINT((ndo, "\n\t hello-time %.3lfs, MPR willingness %u",
386 ME_TO_DOUBLE(ptr.hello->htime), ptr.hello->will));
387 msg_data += sizeof(struct olsr_hello);
388 msg_tlen -= sizeof(struct olsr_hello);
390 while (msg_tlen >= sizeof(struct olsr_hello_link)) {
391 int hello_len_valid = 0;
396 ND_TCHECK2(*msg_data, sizeof(struct olsr_hello_link));
398 ptr.hello_link = (struct olsr_hello_link *)msg_data;
400 hello_len = EXTRACT_16BITS(ptr.hello_link->len);
401 link_type = OLSR_EXTRACT_LINK_TYPE(ptr.hello_link->link_code);
402 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(ptr.hello_link->link_code);
404 if ((hello_len <= msg_tlen)
405 && (hello_len >= sizeof(struct olsr_hello_link)))
408 ND_PRINT((ndo, "\n\t link-type %s, neighbor-type %s, len %u%s",
409 tok2str(olsr_link_type_values, "Unknown", link_type),
410 tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
412 (hello_len_valid == 0) ? " (invalid)" : ""));
414 if (hello_len_valid == 0)
417 msg_data += sizeof(struct olsr_hello_link);
418 msg_tlen -= sizeof(struct olsr_hello_link);
419 hello_len -= sizeof(struct olsr_hello_link);
421 ND_TCHECK2(*msg_data, hello_len);
422 if (msg_type == OLSR_HELLO_MSG) {
423 if (olsr_print_neighbor(ndo, msg_data, hello_len) == -1)
428 if (olsr_print_lq_neighbor6(ndo, msg_data, hello_len) == -1)
433 if (olsr_print_lq_neighbor4(ndo, msg_data, hello_len) == -1)
438 msg_data += hello_len;
439 msg_tlen -= hello_len;
445 if (msg_tlen < sizeof(struct olsr_tc))
447 ND_TCHECK2(*msg_data, sizeof(struct olsr_tc));
449 ptr.tc = (struct olsr_tc *)msg_data;
450 ND_PRINT((ndo, "\n\t advertised neighbor seq 0x%04x",
451 EXTRACT_16BITS(ptr.tc->ans_seq)));
452 msg_data += sizeof(struct olsr_tc);
453 msg_tlen -= sizeof(struct olsr_tc);
455 if (msg_type == OLSR_TC_MSG) {
456 if (olsr_print_neighbor(ndo, msg_data, msg_tlen) == -1)
461 if (olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen) == -1)
466 if (olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen) == -1)
474 size_t addr_size = sizeof(struct in_addr);
478 addr_size = sizeof(struct in6_addr);
481 while (msg_tlen >= addr_size) {
482 ND_TCHECK2(*msg_data, addr_size);
484 ND_PRINT((ndo, "\n\t interface address %s",
485 is_ipv6 ? ip6addr_string(ndo, msg_data) :
486 ipaddr_string(ndo, msg_data)));
488 ND_PRINT((ndo, "\n\t interface address %s",
489 ipaddr_string(ndo, msg_data)));
492 msg_data += addr_size;
493 msg_tlen -= addr_size;
499 ND_PRINT((ndo, "\n\t Advertised networks (total %u)",
500 (unsigned int) (msg_tlen / sizeof(struct olsr_hna6))));
505 while (msg_tlen >= sizeof(struct olsr_hna6)) {
506 struct olsr_hna6 *hna6;
508 ND_TCHECK2(*msg_data, sizeof(struct olsr_hna6));
510 hna6 = (struct olsr_hna6 *)msg_data;
512 ND_PRINT((ndo, "\n\t #%i: %s/%u",
513 i, ip6addr_string(ndo, hna6->network),
514 mask62plen (hna6->mask)));
516 msg_data += sizeof(struct olsr_hna6);
517 msg_tlen -= sizeof(struct olsr_hna6);
524 while (msg_tlen >= sizeof(struct olsr_hna4)) {
525 ND_TCHECK2(*msg_data, sizeof(struct olsr_hna4));
527 ptr.hna = (struct olsr_hna4 *)msg_data;
529 /* print 4 prefixes per line */
530 ND_PRINT((ndo, "%s%s/%u",
531 col == 0 ? "\n\t " : ", ",
532 ipaddr_string(ndo, ptr.hna->network),
533 mask2plen(EXTRACT_32BITS(ptr.hna->mask))));
535 msg_data += sizeof(struct olsr_hna4);
536 msg_tlen -= sizeof(struct olsr_hna4);
543 case OLSR_NAMESERVICE_MSG:
545 u_int name_entries = EXTRACT_16BITS(msg_data+2);
547 int name_entries_valid = 0;
553 if ((name_entries > 0)
554 && ((name_entries * (4 + addr_size)) <= msg_tlen))
555 name_entries_valid = 1;
559 ND_TCHECK2(*msg_data, 4);
561 ND_PRINT((ndo, "\n\t Version %u, Entries %u%s",
562 EXTRACT_16BITS(msg_data),
563 name_entries, (name_entries_valid == 0) ? " (invalid)" : ""));
565 if (name_entries_valid == 0)
571 for (i = 0; i < name_entries; i++) {
572 int name_entry_len_valid = 0;
576 ND_TCHECK2(*msg_data, 4);
578 name_entry_type = EXTRACT_16BITS(msg_data);
579 name_entry_len = EXTRACT_16BITS(msg_data+2);
584 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
585 name_entry_len_valid = 1;
587 ND_PRINT((ndo, "\n\t #%u: type %#06x, length %u%s",
588 (unsigned int) i, name_entry_type,
589 name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : ""));
591 if (name_entry_len_valid == 0)
594 /* 32-bit alignment */
595 name_entry_padding = 0;
596 if (name_entry_len%4 != 0)
597 name_entry_padding = 4-(name_entry_len%4);
599 if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
602 ND_TCHECK2(*msg_data, addr_size + name_entry_len + name_entry_padding);
606 ND_PRINT((ndo, ", address %s, name \"",
607 ip6addr_string(ndo, msg_data)));
610 ND_PRINT((ndo, ", address %s, name \"",
611 ipaddr_string(ndo, msg_data)));
612 (void)fn_printn(ndo, msg_data + addr_size, name_entry_len, NULL);
613 ND_PRINT((ndo, "\""));
615 msg_data += addr_size + name_entry_len + name_entry_padding;
616 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
617 } /* for (i = 0; i < name_entries; i++) */
619 } /* case OLSR_NAMESERVICE_MSG */
622 * FIXME those are the defined messages that lack a decoder
623 * you are welcome to contribute code ;-)
625 case OLSR_POWERINFO_MSG:
627 print_unknown_data(ndo, msg_data, "\n\t ", msg_tlen);
629 } /* switch (msg_type) */
631 } /* while (tptr < (pptr+length)) */
636 ND_PRINT((ndo, "[|olsr]"));
641 * c-style: whitesmith