]> The Tcpdump Group git mirrors - tcpdump/blob - print-pim.c
projects / tcpdump / blob
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
add baseline LSP-PING support per draft-ietf-mpls-lsp-ping-05
[tcpdump] / print-pim.c
1 /*
2 * Copyright (c) 1995, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 #ifndef lint
23 static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-pim.c,v 1.43 2004-03-24 02:51:10 guy Exp $ (LBL)";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <tcpdump-stdinc.h>
32 #include "interface.h"
33
34 #define PIMV2_TYPE_HELLO 0
35 #define PIMV2_TYPE_REGISTER 1
36 #define PIMV2_TYPE_REGISTER_STOP 2
37 #define PIMV2_TYPE_JOIN_PRUNE 3
38 #define PIMV2_TYPE_BOOTSTRAP 4
39 #define PIMV2_TYPE_ASSERT 5
40 #define PIMV2_TYPE_GRAFT 6
41 #define PIMV2_TYPE_GRAFT_ACK 7
42 #define PIMV2_TYPE_CANDIDATE_RP 8
43 #define PIMV2_TYPE_PRUNE_REFRESH 9
44
45 static struct tok pimv2_type_values[] = {
46 { PIMV2_TYPE_HELLO, "Hello" },
47 { PIMV2_TYPE_REGISTER, "Register" },
48 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
49 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" },
50 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" },
51 { PIMV2_TYPE_ASSERT, "Assert" },
52 { PIMV2_TYPE_GRAFT, "Graft" },
53 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" },
54 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" },
55 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
56 { 0, NULL}
57 };
58
59 #define PIMV2_HELLO_OPTION_HOLDTIME 1
60 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2
61 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18
62 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19
63 #define PIMV2_HELLO_OPTION_GENID 20
64 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21
65 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22
66 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24
67 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
68
69 static struct tok pimv2_hello_option_values[] = {
70 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" },
71 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" },
72 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" },
73 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" },
74 { PIMV2_HELLO_OPTION_GENID, "Generation ID" },
75 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" },
76 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" },
77 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" },
78 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
79 { 0, NULL}
80 };
81
82
83 /*
84 * XXX: We consider a case where IPv6 is not ready yet for portability,
85 * but PIM dependent defintions should be independent of IPv6...
86 */
87
88 struct pim {
89 u_int8_t pim_typever;
90 /* upper 4bit: PIM version number; 2 for PIMv2 */
91 /* lower 4bit: the PIM message type, currently they are:
92 * Hello, Register, Register-Stop, Join/Prune,
93 * Bootstrap, Assert, Graft (PIM-DM only),
94 * Graft-Ack (PIM-DM only), C-RP-Adv
95 */
96 #define PIM_VER(x) (((x) & 0xf0) >> 4)
97 #define PIM_TYPE(x) ((x) & 0x0f)
98 u_char pim_rsv; /* Reserved */
99 u_short pim_cksum; /* IP style check sum */
100 };
101
102
103 #include <stdio.h>
104 #include <stdlib.h>
105
106 #include "interface.h"
107 #include "addrtoname.h"
108 #include "extract.h"
109
110 #include "ip.h"
111
112 static void pimv2_print(register const u_char *bp, register u_int len);
113
114 static void
115 pimv1_join_prune_print(register const u_char *bp, register u_int len)
116 {
117 int maddrlen, addrlen, ngroups, njoin, nprune;
118 int njp;
119
120 /* If it's a single group and a single source, use 1-line output. */
121 if (TTEST2(bp[0], 30) && bp[11] == 1 &&
122 ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
123 int hold;
124
125 (void)printf(" RPF %s ", ipaddr_string(bp));
126 hold = EXTRACT_16BITS(&bp[6]);
127 if (hold != 180) {
128 (void)printf("Hold ");
129 relts_print(hold);
130 }
131 (void)printf("%s (%s/%d, %s", njoin ? "Join" : "Prune",
132 ipaddr_string(&bp[26]), bp[25] & 0x3f,
133 ipaddr_string(&bp[12]));
134 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
135 (void)printf("/%s", ipaddr_string(&bp[16]));
136 (void)printf(") %s%s %s",
137 (bp[24] & 0x01) ? "Sparse" : "Dense",
138 (bp[25] & 0x80) ? " WC" : "",
139 (bp[25] & 0x40) ? "RP" : "SPT");
140 return;
141 }
142
143 TCHECK2(bp[0], 4);
144 if (vflag > 1)
145 (void)printf("\n");
146 (void)printf(" Upstream Nbr: %s", ipaddr_string(bp));
147 TCHECK2(bp[6], 2);
148 if (vflag > 1)
149 (void)printf("\n");
150 (void)printf(" Hold time: ");
151 relts_print(EXTRACT_16BITS(&bp[6]));
152 if (vflag < 2)
153 return;
154 bp += 8;
155 len -= 8;
156
157 TCHECK2(bp[0], 4);
158 maddrlen = bp[1];
159 addrlen = bp[2];
160 ngroups = bp[3];
161 bp += 4;
162 len -= 4;
163 while (ngroups--) {
164 TCHECK2(bp[0], 4);
165 (void)printf("\n\tGroup: %s", ipaddr_string(bp));
166 TCHECK2(bp[4], 4);
167 if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
168 (void)printf("/%s", ipaddr_string(&bp[4]));
169 TCHECK2(bp[8], 4);
170 njoin = EXTRACT_16BITS(&bp[8]);
171 nprune = EXTRACT_16BITS(&bp[10]);
172 (void)printf(" joined: %d pruned: %d", njoin, nprune);
173 bp += 12;
174 len -= 12;
175 for (njp = 0; njp < (njoin + nprune); njp++) {
176 const char *type;
177
178 if (njp < njoin)
179 type = "Join ";
180 else
181 type = "Prune";
182 TCHECK2(bp[0], 6);
183 (void)printf("\n\t%s %s%s%s%s/%d", type,
184 (bp[0] & 0x01) ? "Sparse " : "Dense ",
185 (bp[1] & 0x80) ? "WC " : "",
186 (bp[1] & 0x40) ? "RP " : "SPT ",
187 ipaddr_string(&bp[2]), bp[1] & 0x3f);
188 bp += 6;
189 len -= 6;
190 }
191 }
192 return;
193 trunc:
194 (void)printf("[|pim]");
195 return;
196 }
197
198 void
199 pimv1_print(register const u_char *bp, register u_int len)
200 {
201 register const u_char *ep;
202 register u_char type;
203
204 ep = (const u_char *)snapend;
205 if (bp >= ep)
206 return;
207
208 TCHECK(bp[1]);
209 type = bp[1];
210
211 switch (type) {
212 case 0:
213 (void)printf(" Query");
214 if (TTEST(bp[8])) {
215 switch (bp[8] >> 4) {
216 case 0:
217 (void)printf(" Dense-mode");
218 break;
219 case 1:
220 (void)printf(" Sparse-mode");
221 break;
222 case 2:
223 (void)printf(" Sparse-Dense-mode");
224 break;
225 default:
226 (void)printf(" mode-%d", bp[8] >> 4);
227 break;
228 }
229 }
230 if (vflag) {
231 TCHECK2(bp[10],2);
232 (void)printf(" (Hold-time ");
233 relts_print(EXTRACT_16BITS(&bp[10]));
234 (void)printf(")");
235 }
236 break;
237
238 case 1:
239 (void)printf(" Register");
240 TCHECK2(bp[8], 20); /* ip header */
241 (void)printf(" for %s > %s", ipaddr_string(&bp[20]),
242 ipaddr_string(&bp[24]));
243 break;
244 case 2:
245 (void)printf(" Register-Stop");
246 TCHECK2(bp[12], 4);
247 (void)printf(" for %s > %s", ipaddr_string(&bp[8]),
248 ipaddr_string(&bp[12]));
249 break;
250 case 3:
251 (void)printf(" Join/Prune");
252 if (vflag)
253 pimv1_join_prune_print(&bp[8], len - 8);
254 break;
255 case 4:
256 (void)printf(" RP-reachable");
257 if (vflag) {
258 TCHECK2(bp[22], 2);
259 (void)printf(" group %s",
260 ipaddr_string(&bp[8]));
261 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
262 (void)printf("/%s", ipaddr_string(&bp[12]));
263 (void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
264 relts_print(EXTRACT_16BITS(&bp[22]));
265 }
266 break;
267 case 5:
268 (void)printf(" Assert");
269 TCHECK2(bp[16], 4);
270 (void)printf(" for %s > %s", ipaddr_string(&bp[16]),
271 ipaddr_string(&bp[8]));
272 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
273 (void)printf("/%s", ipaddr_string(&bp[12]));
274 TCHECK2(bp[24], 4);
275 (void)printf(" %s pref %d metric %d",
276 (bp[20] & 0x80) ? "RP-tree" : "SPT",
277 EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
278 EXTRACT_32BITS(&bp[24]));
279 break;
280 case 6:
281 (void)printf(" Graft");
282 if (vflag)
283 pimv1_join_prune_print(&bp[8], len - 8);
284 break;
285 case 7:
286 (void)printf(" Graft-ACK");
287 if (vflag)
288 pimv1_join_prune_print(&bp[8], len - 8);
289 break;
290 case 8:
291 (void)printf(" Mode");
292 break;
293 default:
294 (void)printf(" [type %d]", type);
295 break;
296 }
297 if ((bp[4] >> 4) != 1)
298 (void)printf(" [v%d]", bp[4] >> 4);
299 return;
300
301 trunc:
302 (void)printf("[|pim]");
303 return;
304 }
305
306 /*
307 * auto-RP is a cisco protocol, documented at
308 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
309 *
310 * This implements version 1+, dated Sept 9, 1998.
311 */
312 void
313 cisco_autorp_print(register const u_char *bp, register u_int len)
314 {
315 int type;
316 int numrps;
317 int hold;
318
319 TCHECK(bp[0]);
320 (void)printf(" auto-rp ");
321 type = bp[0];
322 switch (type) {
323 case 0x11:
324 (void)printf("candidate-advert");
325 break;
326 case 0x12:
327 (void)printf("mapping");
328 break;
329 default:
330 (void)printf("type-0x%02x", type);
331 break;
332 }
333
334 TCHECK(bp[1]);
335 numrps = bp[1];
336
337 TCHECK2(bp[2], 2);
338 (void)printf(" Hold ");
339 hold = EXTRACT_16BITS(&bp[2]);
340 if (hold)
341 relts_print(EXTRACT_16BITS(&bp[2]));
342 else
343 printf("FOREVER");
344
345 /* Next 4 bytes are reserved. */
346
347 bp += 8; len -= 8;
348
349 /*XXX skip unless -v? */
350
351 /*
352 * Rest of packet:
353 * numrps entries of the form:
354 * 32 bits: RP
355 * 6 bits: reserved
356 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
357 * 8 bits: # of entries for this RP
358 * each entry: 7 bits: reserved, 1 bit: negative,
359 * 8 bits: mask 32 bits: source
360 * lather, rinse, repeat.
361 */
362 while (numrps--) {
363 int nentries;
364 char s;
365
366 TCHECK2(bp[0], 4);
367 (void)printf(" RP %s", ipaddr_string(bp));
368 TCHECK(bp[4]);
369 switch (bp[4] & 0x3) {
370 case 0: printf(" PIMv?");
371 break;
372 case 1: printf(" PIMv1");
373 break;
374 case 2: printf(" PIMv2");
375 break;
376 case 3: printf(" PIMv1+2");
377 break;
378 }
379 if (bp[4] & 0xfc)
380 (void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
381 TCHECK(bp[5]);
382 nentries = bp[5];
383 bp += 6; len -= 6;
384 s = ' ';
385 for (; nentries; nentries--) {
386 TCHECK2(bp[0], 6);
387 (void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
388 ipaddr_string(&bp[2]), bp[1]);
389 if (bp[0] & 0xfe)
390 (void)printf("[rsvd=0x%02x]", bp[0] & 0xfe);
391 s = ',';
392 bp += 6; len -= 6;
393 }
394 }
395 return;
396
397 trunc:
398 (void)printf("[|autorp]");
399 return;
400 }
401
402 void
403 pim_print(register const u_char *bp, register u_int len)
404 {
405 register const u_char *ep;
406 register struct pim *pim = (struct pim *)bp;
407
408 ep = (const u_char *)snapend;
409 if (bp >= ep)
410 return;
411 #ifdef notyet /* currently we see only version and type */
412 TCHECK(pim->pim_rsv);
413 #endif
414
415 switch (PIM_VER(pim->pim_typever)) {
416 case 2:
417 if (!vflag) {
418 printf("PIMv%u, %s (%u), length: %u",
419 PIM_VER(pim->pim_typever),
420 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
421 PIM_TYPE(pim->pim_typever),
422 len);
423 return;
424 } else {
425 printf("PIMv%u, length: %u\n\t%s (%u)",
426 PIM_VER(pim->pim_typever),
427 len,
428 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
429 PIM_TYPE(pim->pim_typever));
430 pimv2_print(bp, len);
431 }
432 break;
433 default:
434 printf("PIMv%u, length: %u",
435 PIM_VER(pim->pim_typever),
436 len);
437 break;
438 }
439 return;
440 }
441
442 /*
443 * PIMv2 uses encoded address representations.
444 *
445 * The last PIM-SM I-D before RFC2117 was published specified the
446 * following representation for unicast addresses. However, RFC2117
447 * specified no encoding for unicast addresses with the unicast
448 * address length specified in the header. Therefore, we have to
449 * guess which encoding is being used (Cisco's PIMv2 implementation
450 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
451 * field into a 'unicast-address-length-in-bytes' field. We guess
452 * that it's the draft encoding if this reserved field is zero.
453 *
454 * RFC2362 goes back to the encoded format, and calls the addr length
455 * field "reserved" again.
456 *
457 * The first byte is the address family, from:
458 *
459 * 0 Reserved
460 * 1 IP (IP version 4)
461 * 2 IP6 (IP version 6)
462 * 3 NSAP
463 * 4 HDLC (8-bit multidrop)
464 * 5 BBN 1822
465 * 6 802 (includes all 802 media plus Ethernet "canonical format")
466 * 7 E.163
467 * 8 E.164 (SMDS, Frame Relay, ATM)
468 * 9 F.69 (Telex)
469 * 10 X.121 (X.25, Frame Relay)
470 * 11 IPX
471 * 12 Appletalk
472 * 13 Decnet IV
473 * 14 Banyan Vines
474 * 15 E.164 with NSAP format subaddress
475 *
476 * In addition, the second byte is an "Encoding". 0 is the default
477 * encoding for the address family, and no other encodings are currently
478 * specified.
479 *
480 */
481
482 static int pimv2_addr_len;
483
484 enum pimv2_addrtype {
485 pimv2_unicast, pimv2_group, pimv2_source
486 };
487
488 /* 0 1 2 3
489 * 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
490 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
491 * | Addr Family | Encoding Type | Unicast Address |
492 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
493 * 0 1 2 3
494 * 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
495 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
496 * | Addr Family | Encoding Type | Reserved | Mask Len |
497 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
498 * | Group multicast Address |
499 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
500 * 0 1 2 3
501 * 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
502 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
503 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
504 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
505 * | Source Address |
506 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
507 */
508 static int
509 pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
510 {
511 int af;
512 const char *afstr;
513 int len, hdrlen;
514
515 TCHECK(bp[0]);
516
517 if (pimv2_addr_len == 0) {
518 TCHECK(bp[1]);
519 switch (bp[0]) {
520 case 1:
521 af = AF_INET;
522 afstr = "IPv4";
523 len = 4;
524 break;
525 #ifdef INET6
526 case 2:
527 af = AF_INET6;
528 afstr = "IPv6";
529 len = 16;
530 break;
531 #endif
532 default:
533 return -1;
534 }
535 if (bp[1] != 0)
536 return -1;
537 hdrlen = 2;
538 } else {
539 switch (pimv2_addr_len) {
540 case 4:
541 af = AF_INET;
542 afstr = "IPv4";
543 break;
544 #ifdef INET6
545 case 16:
546 af = AF_INET6;
547 afstr = "IPv6";
548 break;
549 #endif
550 default:
551 return -1;
552 break;
553 }
554 len = pimv2_addr_len;
555 hdrlen = 0;
556 }
557
558 bp += hdrlen;
559 switch (at) {
560 case pimv2_unicast:
561 TCHECK2(bp[0], len);
562 if (af == AF_INET) {
563 if (!silent)
564 (void)printf("%s", ipaddr_string(bp));
565 }
566 #ifdef INET6
567 else if (af == AF_INET6) {
568 if (!silent)
569 (void)printf("%s", ip6addr_string(bp));
570 }
571 #endif
572 return hdrlen + len;
573 case pimv2_group:
574 case pimv2_source:
575 TCHECK2(bp[0], len + 2);
576 if (af == AF_INET) {
577 if (!silent) {
578 (void)printf("%s", ipaddr_string(bp + 2));
579 if (bp[1] != 32)
580 (void)printf("/%u", bp[1]);
581 }
582 }
583 #ifdef INET6
584 else if (af == AF_INET6) {
585 if (!silent) {
586 (void)printf("%s", ip6addr_string(bp + 2));
587 if (bp[1] != 128)
588 (void)printf("/%u", bp[1]);
589 }
590 }
591 #endif
592 if (bp[0] && !silent) {
593 if (at == pimv2_group) {
594 (void)printf("(0x%02x)", bp[0]);
595 } else {
596 (void)printf("(%s%s%s",
597 bp[0] & 0x04 ? "S" : "",
598 bp[0] & 0x02 ? "W" : "",
599 bp[0] & 0x01 ? "R" : "");
600 if (bp[0] & 0xf8) {
601 (void) printf("+0x%02x", bp[0] & 0xf8);
602 }
603 (void)printf(")");
604 }
605 }
606 return hdrlen + 2 + len;
607 default:
608 return -1;
609 }
610 trunc:
611 return -1;
612 }
613
614 static void
615 pimv2_print(register const u_char *bp, register u_int len)
616 {
617 register const u_char *ep;
618 register struct pim *pim = (struct pim *)bp;
619 int advance;
620
621 ep = (const u_char *)snapend;
622 if (bp >= ep)
623 return;
624 if (ep > bp + len)
625 ep = bp + len;
626 TCHECK(pim->pim_rsv);
627 pimv2_addr_len = pim->pim_rsv;
628 if (pimv2_addr_len != 0)
629 (void)printf(", RFC2117-encoding");
630
631 switch (PIM_TYPE(pim->pim_typever)) {
632 case PIMV2_TYPE_HELLO:
633 {
634 u_int16_t otype, olen;
635 bp += 4;
636 while (bp < ep) {
637 TCHECK2(bp[0], 4);
638 otype = EXTRACT_16BITS(&bp[0]);
639 olen = EXTRACT_16BITS(&bp[2]);
640 TCHECK2(bp[0], 4 + olen);
641
642 printf("\n\t %s Option (%u), length: %u, Value: ",
643 tok2str( pimv2_hello_option_values,"Unknown",otype),
644 otype,
645 olen);
646 bp += 4;
647
648 switch (otype) {
649 case PIMV2_HELLO_OPTION_HOLDTIME:
650 relts_print(EXTRACT_16BITS(bp));
651 break;
652
653 case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
654 if (olen != 4) {
655 (void)printf("ERROR: Option Lenght != 4 Bytes (%u)", olen);
656 } else {
657 char t_bit;
658 u_int16_t lan_delay, override_interval;
659 lan_delay = EXTRACT_16BITS(bp);
660 override_interval = EXTRACT_16BITS(bp+2);
661 t_bit = (lan_delay & 0x8000)? 1 : 0;
662 lan_delay &= ~0x8000;
663 (void)printf("\n\t T-bit=%d, LAN delay %dms, Override interval %dms",
664 t_bit, lan_delay, override_interval);
665 }
666 break;
667
668 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
669 case PIMV2_HELLO_OPTION_DR_PRIORITY:
670 switch (olen) {
671 case 0:
672 printf("Bi-Directional Capability (Old)");
673 break;
674 case 4:
675 printf("%u", EXTRACT_32BITS(bp));
676 break;
677 default:
678 printf("ERROR: Option Lenght != 4 Bytes (%u)", olen);
679 break;
680 }
681 break;
682
683 case PIMV2_HELLO_OPTION_GENID:
684 (void)printf("0x%08x", EXTRACT_32BITS(bp));
685 break;
686
687 case PIMV2_HELLO_OPTION_REFRESH_CAP:
688 (void)printf("v%d", *bp);
689 if (*(bp+1) != 0) {
690 (void)printf(", interval ");
691 relts_print(*(bp+1));
692 }
693 if (EXTRACT_16BITS(bp+2) != 0) {
694 (void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
695 }
696 break;
697
698 case PIMV2_HELLO_OPTION_BIDIR_CAP:
699 break;
700
701 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
702 case PIMV2_HELLO_OPTION_ADDRESS_LIST:
703 if (vflag > 1) {
704 const u_char *ptr = bp;
705 while (ptr < (bp+olen)) {
706 int advance;
707
708 printf("\n\t ");
709 advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
710 if (advance < 0) {
711 printf("...");
712 break;
713 }
714 ptr += advance;
715 }
716 }
717 break;
718 default:
719 if (vflag <= 1)
720 print_unknown_data(bp,"\n\t ",olen);
721 break;
722 }
723 /* do we want to see an additionally hexdump ? */
724 if (vflag> 1)
725 print_unknown_data(bp,"\n\t ",olen);
726 bp += olen;
727 }
728 break;
729 }
730
731 case PIMV2_TYPE_REGISTER:
732 {
733 struct ip *ip;
734
735 if (vflag && bp + 8 <= ep) {
736 (void)printf(" %s%s", bp[4] & 0x80 ? "B" : "",
737 bp[4] & 0x40 ? "N" : "");
738 }
739 bp += 8; len -= 8;
740
741 /* encapsulated multicast packet */
742 if (bp >= ep)
743 break;
744 ip = (struct ip *)bp;
745 switch (IP_V(ip)) {
746 case 4: /* IPv4 */
747 printf(" ");
748 ip_print(bp, len);
749 break;
750 #ifdef INET6
751 case 6: /* IPv6 */
752 printf(" ");
753 ip6_print(bp, len);
754 break;
755 #endif
756 default:
757 (void)printf(" IP ver %d", IP_V(ip));
758 break;
759 }
760 break;
761 }
762
763 case PIMV2_TYPE_REGISTER_STOP:
764 bp += 4; len -= 4;
765 if (bp >= ep)
766 break;
767 (void)printf(" group=");
768 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
769 (void)printf("...");
770 break;
771 }
772 bp += advance; len -= advance;
773 if (bp >= ep)
774 break;
775 (void)printf(" source=");
776 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
777 (void)printf("...");
778 break;
779 }
780 bp += advance; len -= advance;
781 break;
782
783 case PIMV2_TYPE_JOIN_PRUNE:
784 case PIMV2_TYPE_GRAFT:
785 case PIMV2_TYPE_GRAFT_ACK:
786
787
788 /*
789 * 0 1 2 3
790 * 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
791 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
792 * |PIM Ver| Type | Addr length | Checksum |
793 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
794 * | Unicast-Upstream Neighbor Address |
795 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
796 * | Reserved | Num groups | Holdtime |
797 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
798 * | Encoded-Multicast Group Address-1 |
799 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
800 * | Number of Joined Sources | Number of Pruned Sources |
801 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
802 * | Encoded-Joined Source Address-1 |
803 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
804 * | . |
805 * | . |
806 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
807 * | Encoded-Joined Source Address-n |
808 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
809 * | Encoded-Pruned Source Address-1 |
810 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
811 * | . |
812 * | . |
813 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
814 * | Encoded-Pruned Source Address-n |
815 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
816 * | . |
817 * | . |
818 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
819 * | Encoded-Multicast Group Address-n |
820 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
821 */
822
823 {
824 u_int8_t ngroup;
825 u_int16_t holdtime;
826 u_int16_t njoin;
827 u_int16_t nprune;
828 int i, j;
829
830 bp += 4; len -= 4;
831 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
832 if (bp >= ep)
833 break;
834 (void)printf(", upstream-neighbor: ");
835 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
836 (void)printf("...");
837 break;
838 }
839 bp += advance; len -= advance;
840 }
841 if (bp + 4 > ep)
842 break;
843 ngroup = bp[1];
844 holdtime = EXTRACT_16BITS(&bp[2]);
845 (void)printf("\n\t %u group(s)", ngroup);
846 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
847 (void)printf(", holdtime: ");
848 if (holdtime == 0xffff)
849 (void)printf("infinite");
850 else
851 relts_print(holdtime);
852 }
853 bp += 4; len -= 4;
854 for (i = 0; i < ngroup; i++) {
855 if (bp >= ep)
856 goto jp_done;
857 (void)printf("\n\t group #%u: ", i+1);
858 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
859 (void)printf("...)");
860 goto jp_done;
861 }
862 bp += advance; len -= advance;
863 if (bp + 4 > ep) {
864 (void)printf("...)");
865 goto jp_done;
866 }
867 njoin = EXTRACT_16BITS(&bp[0]);
868 nprune = EXTRACT_16BITS(&bp[2]);
869 (void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
870 bp += 4; len -= 4;
871 for (j = 0; j < njoin; j++) {
872 (void)printf("\n\t joined source #%u: ",j+1);
873 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
874 (void)printf("...)");
875 goto jp_done;
876 }
877 bp += advance; len -= advance;
878 }
879 for (j = 0; j < nprune; j++) {
880 (void)printf("\n\t pruned source #%u: ",j+1);
881 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
882 (void)printf("...)");
883 goto jp_done;
884 }
885 bp += advance; len -= advance;
886 }
887 }
888 jp_done:
889 break;
890 }
891
892 case PIMV2_TYPE_BOOTSTRAP:
893 {
894 int i, j, frpcnt;
895 bp += 4;
896
897 /* Fragment Tag, Hash Mask len, and BSR-priority */
898 if (bp + sizeof(u_int16_t) >= ep) break;
899 (void)printf(" tag=%x", EXTRACT_16BITS(bp));
900 bp += sizeof(u_int16_t);
901 if (bp >= ep) break;
902 (void)printf(" hashmlen=%d", bp[0]);
903 if (bp + 1 >= ep) break;
904 (void)printf(" BSRprio=%d", bp[1]);
905 bp += 2;
906
907 /* Encoded-Unicast-BSR-Address */
908 if (bp >= ep) break;
909 (void)printf(" BSR=");
910 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
911 (void)printf("...");
912 break;
913 }
914 bp += advance;
915
916 for (i = 0; bp < ep; i++) {
917 /* Encoded-Group Address */
918 (void)printf(" (group%d: ", i);
919 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
920 < 0) {
921 (void)printf("...)");
922 goto bs_done;
923 }
924 bp += advance;
925
926 /* RP-Count, Frag RP-Cnt, and rsvd */
927 if (bp >= ep) {
928 (void)printf("...)");
929 goto bs_done;
930 }
931 (void)printf(" RPcnt=%d", bp[0]);
932 if (bp + 1 >= ep) {
933 (void)printf("...)");
934 goto bs_done;
935 }
936 (void)printf(" FRPcnt=%d", frpcnt = bp[1]);
937 bp += 4;
938
939 for (j = 0; j < frpcnt && bp < ep; j++) {
940 /* each RP info */
941 (void)printf(" RP%d=", j);
942 if ((advance = pimv2_addr_print(bp,
943 pimv2_unicast,
944 0)) < 0) {
945 (void)printf("...)");
946 goto bs_done;
947 }
948 bp += advance;
949
950 if (bp + 1 >= ep) {
951 (void)printf("...)");
952 goto bs_done;
953 }
954 (void)printf(",holdtime=");
955 relts_print(EXTRACT_16BITS(bp));
956 if (bp + 2 >= ep) {
957 (void)printf("...)");
958 goto bs_done;
959 }
960 (void)printf(",prio=%d", bp[2]);
961 bp += 4;
962 }
963 (void)printf(")");
964 }
965 bs_done:
966 break;
967 }
968 case PIMV2_TYPE_ASSERT:
969 bp += 4; len -= 4;
970 if (bp >= ep)
971 break;
972 (void)printf(" group=");
973 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
974 (void)printf("...");
975 break;
976 }
977 bp += advance; len -= advance;
978 if (bp >= ep)
979 break;
980 (void)printf(" src=");
981 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
982 (void)printf("...");
983 break;
984 }
985 bp += advance; len -= advance;
986 if (bp + 8 > ep)
987 break;
988 if (bp[0] & 0x80)
989 (void)printf(" RPT");
990 (void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
991 (void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
992 break;
993
994 case PIMV2_TYPE_CANDIDATE_RP:
995 {
996 int i, pfxcnt;
997 bp += 4;
998
999 /* Prefix-Cnt, Priority, and Holdtime */
1000 if (bp >= ep) break;
1001 (void)printf(" prefix-cnt=%d", bp[0]);
1002 pfxcnt = bp[0];
1003 if (bp + 1 >= ep) break;
1004 (void)printf(" prio=%d", bp[1]);
1005 if (bp + 3 >= ep) break;
1006 (void)printf(" holdtime=");
1007 relts_print(EXTRACT_16BITS(&bp[2]));
1008 bp += 4;
1009
1010 /* Encoded-Unicast-RP-Address */
1011 if (bp >= ep) break;
1012 (void)printf(" RP=");
1013 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1014 (void)printf("...");
1015 break;
1016 }
1017 bp += advance;
1018
1019 /* Encoded-Group Addresses */
1020 for (i = 0; i < pfxcnt && bp < ep; i++) {
1021 (void)printf(" Group%d=", i);
1022 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
1023 < 0) {
1024 (void)printf("...");
1025 break;
1026 }
1027 bp += advance;
1028 }
1029 break;
1030 }
1031
1032 case PIMV2_TYPE_PRUNE_REFRESH:
1033 (void)printf(" src=");
1034 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1035 (void)printf("...");
1036 break;
1037 }
1038 bp += advance;
1039 (void)printf(" grp=");
1040 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
1041 (void)printf("...");
1042 break;
1043 }
1044 bp += advance;
1045 (void)printf(" forwarder=");
1046 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1047 (void)printf("...");
1048 break;
1049 }
1050 bp += advance;
1051 TCHECK2(bp[0], 2);
1052 (void)printf(" TUNR ");
1053 relts_print(EXTRACT_16BITS(bp));
1054 break;
1055
1056
1057 default:
1058 (void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
1059 break;
1060 }
1061
1062 return;
1063
1064 trunc:
1065 (void)printf("[|pim]");
1066 }
[mirror] the TCPdump network dissector