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;
191 ND_PRINT((ndo, "\n\t neighbor %s, link-quality %.2lf%%"
192 ", neighbor-link-quality %.2lf%%",
193 ipaddr_string(ndo, lq_neighbor->neighbor),
194 ((double)lq_neighbor->link_quality/2.55),
195 ((double)lq_neighbor->neighbor_link_quality/2.55)));
197 msg_data += sizeof(struct olsr_lq_neighbor4);
198 hello_len -= sizeof(struct olsr_lq_neighbor4);
204 olsr_print_lq_neighbor6(netdissect_options *ndo,
205 const u_char *msg_data, u_int hello_len)
207 struct olsr_lq_neighbor6 *lq_neighbor;
209 while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
211 lq_neighbor = (struct olsr_lq_neighbor6 *)msg_data;
213 ND_PRINT((ndo, "\n\t neighbor %s, link-quality %.2lf%%"
214 ", neighbor-link-quality %.2lf%%",
215 ip6addr_string(ndo, lq_neighbor->neighbor),
216 ((double)lq_neighbor->link_quality/2.55),
217 ((double)lq_neighbor->neighbor_link_quality/2.55)));
219 msg_data += sizeof(struct olsr_lq_neighbor6);
220 hello_len -= sizeof(struct olsr_lq_neighbor6);
226 * print a neighbor list.
229 olsr_print_neighbor(netdissect_options *ndo,
230 const u_char *msg_data, u_int hello_len)
234 ND_PRINT((ndo, "\n\t neighbor\n\t\t"));
237 while (hello_len >= sizeof(struct in_addr)) {
239 /* print 4 neighbors per line */
241 ND_PRINT((ndo, "%s%s", ipaddr_string(ndo, msg_data),
242 neighbor % 4 == 0 ? "\n\t\t" : " "));
244 msg_data += sizeof(struct in_addr);
245 hello_len -= sizeof(struct in_addr);
251 olsr_print(netdissect_options *ndo,
252 const u_char *pptr, u_int length, int is_ipv6)
255 const struct olsr_common *common;
256 const struct olsr_msg4 *msg4;
257 const struct olsr_msg6 *msg6;
258 const struct olsr_hello *hello;
259 const struct olsr_hello_link *hello_link;
260 const struct olsr_tc *tc;
261 const struct olsr_hna4 *hna;
264 u_int msg_type, msg_len, msg_tlen, hello_len;
265 uint16_t name_entry_type, name_entry_len;
266 u_int name_entry_padding;
267 uint8_t link_type, neighbor_type;
268 const u_char *tptr, *msg_data;
272 if (length < sizeof(struct olsr_common)) {
276 ND_TCHECK2(*tptr, sizeof(struct olsr_common));
278 ptr.common = (struct olsr_common *)tptr;
279 length = min(length, EXTRACT_16BITS(ptr.common->packet_len));
281 ND_PRINT((ndo, "OLSRv%i, seq 0x%04x, length %u",
282 (is_ipv6 == 0) ? 4 : 6,
283 EXTRACT_16BITS(ptr.common->packet_seq),
286 tptr += sizeof(struct olsr_common);
289 * In non-verbose mode, just print version.
291 if (ndo->ndo_vflag < 1) {
295 while (tptr < (pptr+length)) {
298 struct olsr_msg4 *v4;
299 struct olsr_msg6 *v6;
301 int msg_len_valid = 0;
303 ND_TCHECK2(*tptr, sizeof(struct olsr_msg4));
308 msgptr.v6 = (struct olsr_msg6 *) tptr;
309 msg_type = msgptr.v6->msg_type;
310 msg_len = EXTRACT_16BITS(msgptr.v6->msg_len);
311 if ((msg_len >= sizeof (struct olsr_msg6))
312 && (msg_len <= length))
315 /* infinite loop check */
316 if (msg_type == 0 || msg_len == 0) {
320 ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
321 "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
322 tok2str(olsr_msg_values, "Unknown", msg_type),
323 msg_type, ip6addr_string(ndo, msgptr.v6->originator),
326 ME_TO_DOUBLE(msgptr.v6->vtime),
327 EXTRACT_16BITS(msgptr.v6->msg_seq),
328 msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
330 msg_tlen = msg_len - sizeof(struct olsr_msg6);
331 msg_data = tptr + sizeof(struct olsr_msg6);
333 else /* (!is_ipv6) */
336 msgptr.v4 = (struct olsr_msg4 *) tptr;
337 msg_type = msgptr.v4->msg_type;
338 msg_len = EXTRACT_16BITS(msgptr.v4->msg_len);
339 if ((msg_len >= sizeof (struct olsr_msg4))
340 && (msg_len <= length))
343 /* infinite loop check */
344 if (msg_type == 0 || msg_len == 0) {
348 ND_PRINT((ndo, "\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
349 "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
350 tok2str(olsr_msg_values, "Unknown", msg_type),
351 msg_type, ipaddr_string(ndo, msgptr.v4->originator),
354 ME_TO_DOUBLE(msgptr.v4->vtime),
355 EXTRACT_16BITS(msgptr.v4->msg_seq),
356 msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
358 msg_tlen = msg_len - sizeof(struct olsr_msg4);
359 msg_data = tptr + sizeof(struct olsr_msg4);
364 case OLSR_HELLO_LQ_MSG:
365 ND_TCHECK2(*msg_data, sizeof(struct olsr_hello));
367 ptr.hello = (struct olsr_hello *)msg_data;
368 ND_PRINT((ndo, "\n\t hello-time %.3lfs, MPR willingness %u",
369 ME_TO_DOUBLE(ptr.hello->htime), ptr.hello->will));
370 msg_data += sizeof(struct olsr_hello);
371 msg_tlen -= sizeof(struct olsr_hello);
373 while (msg_tlen >= sizeof(struct olsr_hello_link)) {
374 int hello_len_valid = 0;
379 ND_TCHECK2(*msg_data, sizeof(struct olsr_hello_link));
381 ptr.hello_link = (struct olsr_hello_link *)msg_data;
383 hello_len = EXTRACT_16BITS(ptr.hello_link->len);
384 link_type = OLSR_EXTRACT_LINK_TYPE(ptr.hello_link->link_code);
385 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(ptr.hello_link->link_code);
387 if ((hello_len <= msg_tlen)
388 && (hello_len >= sizeof(struct olsr_hello_link)))
391 ND_PRINT((ndo, "\n\t link-type %s, neighbor-type %s, len %u%s",
392 tok2str(olsr_link_type_values, "Unknown", link_type),
393 tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
395 (hello_len_valid == 0) ? " (invalid)" : ""));
397 if (hello_len_valid == 0)
400 msg_data += sizeof(struct olsr_hello_link);
401 msg_tlen -= sizeof(struct olsr_hello_link);
402 hello_len -= sizeof(struct olsr_hello_link);
404 if (msg_type == OLSR_HELLO_MSG) {
405 olsr_print_neighbor(ndo, msg_data, hello_len);
409 olsr_print_lq_neighbor6(ndo, msg_data, hello_len);
412 olsr_print_lq_neighbor4(ndo, msg_data, hello_len);
415 msg_data += hello_len;
416 msg_tlen -= hello_len;
422 ND_TCHECK2(*msg_data, sizeof(struct olsr_tc));
424 ptr.tc = (struct olsr_tc *)msg_data;
425 ND_PRINT((ndo, "\n\t advertised neighbor seq 0x%04x",
426 EXTRACT_16BITS(ptr.tc->ans_seq)));
427 msg_data += sizeof(struct olsr_tc);
428 msg_tlen -= sizeof(struct olsr_tc);
430 if (msg_type == OLSR_TC_MSG) {
431 olsr_print_neighbor(ndo, msg_data, msg_tlen);
435 olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen);
438 olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen);
444 size_t addr_size = sizeof(struct in_addr);
448 addr_size = sizeof(struct in6_addr);
451 while (msg_tlen >= addr_size) {
452 ND_TCHECK2(*msg_data, addr_size);
454 ND_PRINT((ndo, "\n\t interface address %s",
455 is_ipv6 ? ip6addr_string(ndo, msg_data) :
456 ipaddr_string(ndo, msg_data)));
458 ND_PRINT((ndo, "\n\t interface address %s",
459 ipaddr_string(ndo, msg_data)));
462 msg_data += addr_size;
463 msg_tlen -= addr_size;
469 ND_PRINT((ndo, "\n\t Advertised networks (total %u)",
470 (unsigned int) (msg_tlen / sizeof(struct olsr_hna6))));
475 while (msg_tlen >= sizeof(struct olsr_hna6)) {
476 struct olsr_hna6 *hna6;
478 ND_TCHECK2(*msg_data, sizeof(struct olsr_hna6));
480 hna6 = (struct olsr_hna6 *)msg_data;
482 ND_PRINT((ndo, "\n\t #%i: %s/%u",
483 i, ip6addr_string(ndo, hna6->network),
484 mask62plen (hna6->mask)));
486 msg_data += sizeof(struct olsr_hna6);
487 msg_tlen -= sizeof(struct olsr_hna6);
494 while (msg_tlen >= sizeof(struct olsr_hna4)) {
495 ND_TCHECK2(*msg_data, sizeof(struct olsr_hna4));
497 ptr.hna = (struct olsr_hna4 *)msg_data;
499 /* print 4 prefixes per line */
500 ND_PRINT((ndo, "%s%s/%u",
501 col == 0 ? "\n\t " : ", ",
502 ipaddr_string(ndo, ptr.hna->network),
503 mask2plen(EXTRACT_32BITS(ptr.hna->mask))));
505 msg_data += sizeof(struct olsr_hna4);
506 msg_tlen -= sizeof(struct olsr_hna4);
513 case OLSR_NAMESERVICE_MSG:
515 u_int name_entries = EXTRACT_16BITS(msg_data+2);
517 int name_entries_valid = 0;
523 if ((name_entries > 0)
524 && ((name_entries * (4 + addr_size)) <= msg_tlen))
525 name_entries_valid = 1;
529 ND_TCHECK2(*msg_data, 4);
531 ND_PRINT((ndo, "\n\t Version %u, Entries %u%s",
532 EXTRACT_16BITS(msg_data),
533 name_entries, (name_entries_valid == 0) ? " (invalid)" : ""));
535 if (name_entries_valid == 0)
541 for (i = 0; i < name_entries; i++) {
542 int name_entry_len_valid = 0;
546 ND_TCHECK2(*msg_data, 4);
548 name_entry_type = EXTRACT_16BITS(msg_data);
549 name_entry_len = EXTRACT_16BITS(msg_data+2);
554 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
555 name_entry_len_valid = 1;
557 ND_PRINT((ndo, "\n\t #%u: type %#06x, length %u%s",
558 (unsigned int) i, name_entry_type,
559 name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : ""));
561 if (name_entry_len_valid == 0)
564 /* 32-bit alignment */
565 name_entry_padding = 0;
566 if (name_entry_len%4 != 0)
567 name_entry_padding = 4-(name_entry_len%4);
569 if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
572 ND_TCHECK2(*msg_data, addr_size + name_entry_len + name_entry_padding);
576 ND_PRINT((ndo, ", address %s, name \"",
577 ip6addr_string(ndo, msg_data)));
580 ND_PRINT((ndo, ", address %s, name \"",
581 ipaddr_string(ndo, msg_data)));
582 fn_printn(ndo, msg_data + addr_size, name_entry_len, NULL);
583 ND_PRINT((ndo, "\""));
585 msg_data += addr_size + name_entry_len + name_entry_padding;
586 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
587 } /* for (i = 0; i < name_entries; i++) */
589 } /* case OLSR_NAMESERVICE_MSG */
592 * FIXME those are the defined messages that lack a decoder
593 * you are welcome to contribute code ;-)
595 case OLSR_POWERINFO_MSG:
597 print_unknown_data(ndo, msg_data, "\n\t ", msg_tlen);
599 } /* switch (msg_type) */
601 } /* while (tptr < (pptr+length)) */
606 ND_PRINT((ndo, "[|olsr]"));
611 * c-style: whitesmith