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>
26 #include <tcpdump-stdinc.h>
31 #include "interface.h"
32 #include "addrtoname.h"
37 * RFC 3626 common header
40 * 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
41 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
42 * | Packet Length | Packet Sequence Number |
43 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44 * | Message Type | Vtime | Message Size |
45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46 * | Originator Address |
47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48 * | Time To Live | Hop Count | Message Sequence Number |
49 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54 * | Message Type | Vtime | Message Size |
55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
56 * | Originator Address |
57 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
58 * | Time To Live | Hop Count | Message Sequence Number |
59 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
63 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
68 u_int8_t packet_len[2];
69 u_int8_t packet_seq[2];
72 #define OLSR_HELLO_MSG 1 /* rfc3626 */
73 #define OLSR_TC_MSG 2 /* rfc3626 */
74 #define OLSR_MID_MSG 3 /* rfc3626 */
75 #define OLSR_HNA_MSG 4 /* rfc3626 */
76 #define OLSR_POWERINFO_MSG 128
77 #define OLSR_NAMESERVICE_MSG 130
78 #define OLSR_HELLO_LQ_MSG 201 /* LQ extensions olsr.org */
79 #define OLSR_TC_LQ_MSG 202 /* LQ extensions olsr.org */
81 static struct tok olsr_msg_values[] = {
82 { OLSR_HELLO_MSG, "Hello" },
83 { OLSR_TC_MSG, "TC" },
84 { OLSR_MID_MSG, "MID" },
85 { OLSR_HNA_MSG, "HNA" },
86 { OLSR_POWERINFO_MSG, "Powerinfo" },
87 { OLSR_NAMESERVICE_MSG, "Nameservice" },
88 { OLSR_HELLO_LQ_MSG, "Hello-LQ" },
89 { OLSR_TC_LQ_MSG, "TC-LQ" },
97 u_int8_t originator[4];
107 u_int8_t originator[16];
119 struct olsr_hello_link {
136 u_int8_t network[16];
141 #define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
142 #define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
144 static struct tok olsr_link_type_values[] = {
145 { 0, "Unspecified" },
152 static struct tok olsr_neighbor_type_values[] = {
153 { 0, "Not-Neighbor" },
155 { 2, "Symmetric-MPR" },
159 struct olsr_lq_neighbor4 {
160 u_int8_t neighbor[4];
161 u_int8_t link_quality;
162 u_int8_t neighbor_link_quality;
166 struct olsr_lq_neighbor6 {
167 u_int8_t neighbor[16];
168 u_int8_t link_quality;
169 u_int8_t neighbor_link_quality;
174 * macro to convert the 8-bit mantissa/exponent to a double float
175 * taken from olsr.org.
177 #define VTIME_SCALE_FACTOR 0.0625
178 #define ME_TO_DOUBLE(me) \
179 (double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
182 * print a neighbor list with LQ extensions.
185 olsr_print_lq_neighbor4 (const u_char *msg_data, u_int hello_len)
187 struct olsr_lq_neighbor4 *lq_neighbor;
189 while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
191 lq_neighbor = (struct olsr_lq_neighbor4 *)msg_data;
193 printf("\n\t neighbor %s, link-quality %.2lf%%"
194 ", neighbor-link-quality %.2lf%%",
195 ipaddr_string(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);
206 olsr_print_lq_neighbor6 (const u_char *msg_data, u_int hello_len)
208 struct olsr_lq_neighbor6 *lq_neighbor;
210 while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
212 lq_neighbor = (struct olsr_lq_neighbor6 *)msg_data;
214 printf("\n\t neighbor %s, link-quality %.2lf%%"
215 ", neighbor-link-quality %.2lf%%",
216 ip6addr_string(lq_neighbor->neighbor),
217 ((double)lq_neighbor->link_quality/2.55),
218 ((double)lq_neighbor->neighbor_link_quality/2.55));
220 msg_data += sizeof(struct olsr_lq_neighbor6);
221 hello_len -= sizeof(struct olsr_lq_neighbor6);
227 * print a neighbor list.
230 olsr_print_neighbor (const u_char *msg_data, u_int hello_len)
234 printf("\n\t neighbor\n\t\t");
237 while (hello_len >= sizeof(struct in_addr)) {
239 /* print 4 neighbors per line */
241 printf("%s%s", ipaddr_string(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 (const u_char *pptr, u_int length, int is_ipv6)
254 const struct olsr_common *common;
255 const struct olsr_msg4 *msg4;
256 const struct olsr_msg6 *msg6;
257 const struct olsr_hello *hello;
258 const struct olsr_hello_link *hello_link;
259 const struct olsr_tc *tc;
260 const struct olsr_hna4 *hna;
263 u_int msg_type, msg_len, msg_tlen, hello_len;
264 u_int16_t name_entry_type, name_entry_len;
265 u_int name_entry_padding;
266 u_int8_t link_type, neighbor_type;
267 const u_char *tptr, *msg_data;
271 if (length < sizeof(struct olsr_common)) {
275 if (!TTEST2(*tptr, sizeof(struct olsr_common))) {
279 ptr.common = (struct olsr_common *)tptr;
280 length = MIN(length, EXTRACT_16BITS(ptr.common->packet_len));
282 printf("OLSRv%i, seq 0x%04x, length %u",
283 (is_ipv6 == 0) ? 4 : 6,
284 EXTRACT_16BITS(ptr.common->packet_seq),
287 tptr += sizeof(struct olsr_common);
290 * In non-verbose mode, just print version.
296 while (tptr < (pptr+length)) {
299 struct olsr_msg4 *v4;
300 struct olsr_msg6 *v6;
302 int msg_len_valid = 0;
304 if (!TTEST2(*tptr, sizeof(struct olsr_msg4)))
310 msgptr.v6 = (struct olsr_msg6 *) tptr;
311 msg_type = msgptr.v6->msg_type;
312 msg_len = EXTRACT_16BITS(msgptr.v6->msg_len);
313 if ((msg_len >= sizeof (struct olsr_msg6))
314 && (msg_len <= length))
317 /* infinite loop check */
318 if (msg_type == 0 || msg_len == 0) {
322 printf("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
323 "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
324 tok2str(olsr_msg_values, "Unknown", msg_type),
325 msg_type, ip6addr_string(msgptr.v6->originator),
328 ME_TO_DOUBLE(msgptr.v6->vtime),
329 EXTRACT_16BITS(msgptr.v6->msg_seq),
330 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
332 msg_tlen = msg_len - sizeof(struct olsr_msg6);
333 msg_data = tptr + sizeof(struct olsr_msg6);
335 else /* (!is_ipv6) */
338 msgptr.v4 = (struct olsr_msg4 *) tptr;
339 msg_type = msgptr.v4->msg_type;
340 msg_len = EXTRACT_16BITS(msgptr.v4->msg_len);
341 if ((msg_len >= sizeof (struct olsr_msg4))
342 && (msg_len <= length))
345 /* infinite loop check */
346 if (msg_type == 0 || msg_len == 0) {
350 printf("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
351 "\n\t vtime %.3lfs, msg-seq 0x%04x, length %u%s",
352 tok2str(olsr_msg_values, "Unknown", msg_type),
353 msg_type, ipaddr_string(msgptr.v4->originator),
356 ME_TO_DOUBLE(msgptr.v4->vtime),
357 EXTRACT_16BITS(msgptr.v4->msg_seq),
358 msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
360 msg_tlen = msg_len - sizeof(struct olsr_msg4);
361 msg_data = tptr + sizeof(struct olsr_msg4);
366 case OLSR_HELLO_LQ_MSG:
367 if (!TTEST2(*msg_data, sizeof(struct olsr_hello)))
370 ptr.hello = (struct olsr_hello *)msg_data;
371 printf("\n\t hello-time %.3lfs, MPR willingness %u",
372 ME_TO_DOUBLE(ptr.hello->htime), ptr.hello->will);
373 msg_data += sizeof(struct olsr_hello);
374 msg_tlen -= sizeof(struct olsr_hello);
376 while (msg_tlen >= sizeof(struct olsr_hello_link)) {
377 int hello_len_valid = 0;
382 if (!TTEST2(*msg_data, sizeof(struct olsr_hello_link)))
385 ptr.hello_link = (struct olsr_hello_link *)msg_data;
387 hello_len = EXTRACT_16BITS(ptr.hello_link->len);
388 link_type = OLSR_EXTRACT_LINK_TYPE(ptr.hello_link->link_code);
389 neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(ptr.hello_link->link_code);
391 if ((hello_len <= msg_tlen)
392 && (hello_len >= sizeof(struct olsr_hello_link)))
395 printf("\n\t link-type %s, neighbor-type %s, len %u%s",
396 tok2str(olsr_link_type_values, "Unknown", link_type),
397 tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
399 (hello_len_valid == 0) ? " (invalid)" : "");
401 if (hello_len_valid == 0)
404 msg_data += sizeof(struct olsr_hello_link);
405 msg_tlen -= sizeof(struct olsr_hello_link);
406 hello_len -= sizeof(struct olsr_hello_link);
408 if (msg_type == OLSR_HELLO_MSG) {
409 olsr_print_neighbor(msg_data, hello_len);
413 olsr_print_lq_neighbor6(msg_data, hello_len);
416 olsr_print_lq_neighbor4(msg_data, hello_len);
419 msg_data += hello_len;
420 msg_tlen -= hello_len;
426 if (!TTEST2(*msg_data, sizeof(struct olsr_tc)))
429 ptr.tc = (struct olsr_tc *)msg_data;
430 printf("\n\t advertised neighbor seq 0x%04x",
431 EXTRACT_16BITS(ptr.tc->ans_seq));
432 msg_data += sizeof(struct olsr_tc);
433 msg_tlen -= sizeof(struct olsr_tc);
435 if (msg_type == OLSR_TC_MSG) {
436 olsr_print_neighbor(msg_data, msg_tlen);
440 olsr_print_lq_neighbor6(msg_data, msg_tlen);
443 olsr_print_lq_neighbor4(msg_data, msg_tlen);
449 size_t addr_size = sizeof(struct in_addr);
453 addr_size = sizeof(struct in6_addr);
456 while (msg_tlen >= addr_size) {
457 if (!TTEST2(*msg_data, addr_size))
460 printf("\n\t interface address %s",
462 is_ipv6 ? ip6addr_string(msg_data) :
464 ipaddr_string(msg_data));
465 msg_data += addr_size;
466 msg_tlen -= addr_size;
472 printf("\n\t Advertised networks (total %u)",
473 (unsigned int) (msg_tlen / sizeof(struct olsr_hna6)));
478 while (msg_tlen >= sizeof(struct olsr_hna6)) {
479 struct olsr_hna6 *hna6;
481 if (!TTEST2(*msg_data, sizeof(struct olsr_hna6)))
484 hna6 = (struct olsr_hna6 *)msg_data;
486 printf("\n\t #%i: %s/%u",
487 i, ip6addr_string(hna6->network),
488 mask62plen (hna6->mask));
490 msg_data += sizeof(struct olsr_hna6);
491 msg_tlen -= sizeof(struct olsr_hna6);
498 while (msg_tlen >= sizeof(struct olsr_hna4)) {
499 if (!TTEST2(*msg_data, sizeof(struct olsr_hna4)))
502 ptr.hna = (struct olsr_hna4 *)msg_data;
504 /* print 4 prefixes per line */
511 ipaddr_string(ptr.hna->network),
512 mask2plen(EXTRACT_32BITS(ptr.hna->mask)));
514 msg_data += sizeof(struct olsr_hna4);
515 msg_tlen -= sizeof(struct olsr_hna4);
522 case OLSR_NAMESERVICE_MSG:
524 u_int name_entries = EXTRACT_16BITS(msg_data+2);
526 int name_entries_valid = 0;
532 if ((name_entries > 0)
533 && ((name_entries * (4 + addr_size)) <= msg_tlen))
534 name_entries_valid = 1;
538 if (!TTEST2(*msg_data, 4))
541 printf("\n\t Version %u, Entries %u%s",
542 EXTRACT_16BITS(msg_data),
543 name_entries, (name_entries_valid == 0) ? " (invalid)" : "");
545 if (name_entries_valid == 0)
551 for (i = 0; i < name_entries; i++) {
552 int name_entry_len_valid = 0;
556 if (!TTEST2(*msg_data, 4))
559 name_entry_type = EXTRACT_16BITS(msg_data);
560 name_entry_len = EXTRACT_16BITS(msg_data+2);
565 if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
566 name_entry_len_valid = 1;
568 printf("\n\t #%u: type %#06x, length %u%s",
569 (unsigned int) i, name_entry_type,
570 name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : "");
572 if (name_entry_len_valid == 0)
575 /* 32-bit alignment */
576 name_entry_padding = 0;
577 if (name_entry_len%4 != 0)
578 name_entry_padding = 4-(name_entry_len%4);
580 if (msg_tlen < addr_size + name_entry_len + name_entry_padding)
583 if (!TTEST2(*msg_data, addr_size + name_entry_len + name_entry_padding))
588 printf(", address %s, name \"",
589 ip6addr_string(msg_data));
592 printf(", address %s, name \"",
593 ipaddr_string(msg_data));
594 fn_printn(msg_data + addr_size, name_entry_len, NULL);
597 msg_data += addr_size + name_entry_len + name_entry_padding;
598 msg_tlen -= addr_size + name_entry_len + name_entry_padding;
599 } /* for (i = 0; i < name_entries; i++) */
601 } /* case OLSR_NAMESERVICE_MSG */
604 * FIXME those are the defined messages that lack a decoder
605 * you are welcome to contribute code ;-)
607 case OLSR_POWERINFO_MSG:
609 print_unknown_data(msg_data, "\n\t ", msg_tlen);
611 } /* switch (msg_type) */
613 } /* while (tptr < (pptr+length)) */
623 * c-style: whitesmith