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 1.49 2006-02-13 01:31:35 hannes Exp $ (LBL)";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <tcpdump-stdinc.h>
32
33 #include <stdio.h>
34 #include <stdlib.h>
35
36 #include "interface.h"
37 #include "addrtoname.h"
38 #include "extract.h"
39
40 #include "ip.h"
41
42 #define PIMV2_TYPE_HELLO 0
43 #define PIMV2_TYPE_REGISTER 1
44 #define PIMV2_TYPE_REGISTER_STOP 2
45 #define PIMV2_TYPE_JOIN_PRUNE 3
46 #define PIMV2_TYPE_BOOTSTRAP 4
47 #define PIMV2_TYPE_ASSERT 5
48 #define PIMV2_TYPE_GRAFT 6
49 #define PIMV2_TYPE_GRAFT_ACK 7
50 #define PIMV2_TYPE_CANDIDATE_RP 8
51 #define PIMV2_TYPE_PRUNE_REFRESH 9
52
53 static const struct tok pimv2_type_values[] = {
54 { PIMV2_TYPE_HELLO, "Hello" },
55 { PIMV2_TYPE_REGISTER, "Register" },
56 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
57 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" },
58 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" },
59 { PIMV2_TYPE_ASSERT, "Assert" },
60 { PIMV2_TYPE_GRAFT, "Graft" },
61 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" },
62 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" },
63 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
64 { 0, NULL}
65 };
66
67 #define PIMV2_HELLO_OPTION_HOLDTIME 1
68 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2
69 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18
70 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19
71 #define PIMV2_HELLO_OPTION_GENID 20
72 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21
73 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22
74 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24
75 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
76
77 static const struct tok pimv2_hello_option_values[] = {
78 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" },
79 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" },
80 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" },
81 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" },
82 { PIMV2_HELLO_OPTION_GENID, "Generation ID" },
83 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" },
84 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" },
85 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" },
86 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
87 { 0, NULL}
88 };
89
90 #define PIMV2_REGISTER_FLAG_LEN 4
91 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000
92 #define PIMV2_REGISTER_FLAG_NULL 0x40000000
93
94 static const struct tok pimv2_register_flag_values[] = {
95 { PIMV2_REGISTER_FLAG_BORDER, "Border" },
96 { PIMV2_REGISTER_FLAG_NULL, "Null" },
97 { 0, NULL}
98 };
99
100 /*
101 * XXX: We consider a case where IPv6 is not ready yet for portability,
102 * but PIM dependent defintions should be independent of IPv6...
103 */
104
105 struct pim {
106 u_int8_t pim_typever;
107 /* upper 4bit: PIM version number; 2 for PIMv2 */
108 /* lower 4bit: the PIM message type, currently they are:
109 * Hello, Register, Register-Stop, Join/Prune,
110 * Bootstrap, Assert, Graft (PIM-DM only),
111 * Graft-Ack (PIM-DM only), C-RP-Adv
112 */
113 #define PIM_VER(x) (((x) & 0xf0) >> 4)
114 #define PIM_TYPE(x) ((x) & 0x0f)
115 u_char pim_rsv; /* Reserved */
116 u_short pim_cksum; /* IP style check sum */
117 };
118
119 static void pimv2_print(register const u_char *bp, register u_int len, u_int cksum);
120
121 static void
pimv1_join_prune_print(register const u_char * bp,register u_int len)122 pimv1_join_prune_print(register const u_char *bp, register u_int len)
123 {
124 int ngroups, njoin, nprune;
125 int njp;
126
127 /* If it's a single group and a single source, use 1-line output. */
128 if (TTEST2(bp[0], 30) && bp[11] == 1 &&
129 ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
130 int hold;
131
132 (void)printf(" RPF %s ", ipaddr_string(bp));
133 hold = EXTRACT_16BITS(&bp[6]);
134 if (hold != 180) {
135 (void)printf("Hold ");
136 relts_print(hold);
137 }
138 (void)printf("%s (%s/%d, %s", njoin ? "Join" : "Prune",
139 ipaddr_string(&bp[26]), bp[25] & 0x3f,
140 ipaddr_string(&bp[12]));
141 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
142 (void)printf("/%s", ipaddr_string(&bp[16]));
143 (void)printf(") %s%s %s",
144 (bp[24] & 0x01) ? "Sparse" : "Dense",
145 (bp[25] & 0x80) ? " WC" : "",
146 (bp[25] & 0x40) ? "RP" : "SPT");
147 return;
148 }
149
150 TCHECK2(bp[0], sizeof(struct in_addr));
151 if (vflag > 1)
152 (void)printf("\n");
153 (void)printf(" Upstream Nbr: %s", ipaddr_string(bp));
154 TCHECK2(bp[6], 2);
155 if (vflag > 1)
156 (void)printf("\n");
157 (void)printf(" Hold time: ");
158 relts_print(EXTRACT_16BITS(&bp[6]));
159 if (vflag < 2)
160 return;
161 bp += 8;
162 len -= 8;
163
164 TCHECK2(bp[0], 4);
165 ngroups = bp[3];
166 bp += 4;
167 len -= 4;
168 while (ngroups--) {
169 /*
170 * XXX - does the address have length "addrlen" and the
171 * mask length "maddrlen"?
172 */
173 TCHECK2(bp[0], sizeof(struct in_addr));
174 (void)printf("\n\tGroup: %s", ipaddr_string(bp));
175 TCHECK2(bp[4], sizeof(struct in_addr));
176 if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
177 (void)printf("/%s", ipaddr_string(&bp[4]));
178 TCHECK2(bp[8], 4);
179 njoin = EXTRACT_16BITS(&bp[8]);
180 nprune = EXTRACT_16BITS(&bp[10]);
181 (void)printf(" joined: %d pruned: %d", njoin, nprune);
182 bp += 12;
183 len -= 12;
184 for (njp = 0; njp < (njoin + nprune); njp++) {
185 const char *type;
186
187 if (njp < njoin)
188 type = "Join ";
189 else
190 type = "Prune";
191 TCHECK2(bp[0], 6);
192 (void)printf("\n\t%s %s%s%s%s/%d", type,
193 (bp[0] & 0x01) ? "Sparse " : "Dense ",
194 (bp[1] & 0x80) ? "WC " : "",
195 (bp[1] & 0x40) ? "RP " : "SPT ",
196 ipaddr_string(&bp[2]), bp[1] & 0x3f);
197 bp += 6;
198 len -= 6;
199 }
200 }
201 return;
202 trunc:
203 (void)printf("[|pim]");
204 return;
205 }
206
207 void
pimv1_print(register const u_char * bp,register u_int len)208 pimv1_print(register const u_char *bp, register u_int len)
209 {
210 register const u_char *ep;
211 register u_char type;
212
213 ep = (const u_char *)snapend;
214 if (bp >= ep)
215 return;
216
217 TCHECK(bp[1]);
218 type = bp[1];
219
220 switch (type) {
221 case 0:
222 (void)printf(" Query");
223 if (TTEST(bp[8])) {
224 switch (bp[8] >> 4) {
225 case 0:
226 (void)printf(" Dense-mode");
227 break;
228 case 1:
229 (void)printf(" Sparse-mode");
230 break;
231 case 2:
232 (void)printf(" Sparse-Dense-mode");
233 break;
234 default:
235 (void)printf(" mode-%d", bp[8] >> 4);
236 break;
237 }
238 }
239 if (vflag) {
240 TCHECK2(bp[10],2);
241 (void)printf(" (Hold-time ");
242 relts_print(EXTRACT_16BITS(&bp[10]));
243 (void)printf(")");
244 }
245 break;
246
247 case 1:
248 (void)printf(" Register");
249 TCHECK2(bp[8], 20); /* ip header */
250 (void)printf(" for %s > %s", ipaddr_string(&bp[20]),
251 ipaddr_string(&bp[24]));
252 break;
253 case 2:
254 (void)printf(" Register-Stop");
255 TCHECK2(bp[12], sizeof(struct in_addr));
256 (void)printf(" for %s > %s", ipaddr_string(&bp[8]),
257 ipaddr_string(&bp[12]));
258 break;
259 case 3:
260 (void)printf(" Join/Prune");
261 if (vflag)
262 pimv1_join_prune_print(&bp[8], len - 8);
263 break;
264 case 4:
265 (void)printf(" RP-reachable");
266 if (vflag) {
267 TCHECK2(bp[22], 2);
268 (void)printf(" group %s",
269 ipaddr_string(&bp[8]));
270 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
271 (void)printf("/%s", ipaddr_string(&bp[12]));
272 (void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
273 relts_print(EXTRACT_16BITS(&bp[22]));
274 }
275 break;
276 case 5:
277 (void)printf(" Assert");
278 TCHECK2(bp[16], sizeof(struct in_addr));
279 (void)printf(" for %s > %s", ipaddr_string(&bp[16]),
280 ipaddr_string(&bp[8]));
281 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
282 (void)printf("/%s", ipaddr_string(&bp[12]));
283 TCHECK2(bp[24], 4);
284 (void)printf(" %s pref %d metric %d",
285 (bp[20] & 0x80) ? "RP-tree" : "SPT",
286 EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
287 EXTRACT_32BITS(&bp[24]));
288 break;
289 case 6:
290 (void)printf(" Graft");
291 if (vflag)
292 pimv1_join_prune_print(&bp[8], len - 8);
293 break;
294 case 7:
295 (void)printf(" Graft-ACK");
296 if (vflag)
297 pimv1_join_prune_print(&bp[8], len - 8);
298 break;
299 case 8:
300 (void)printf(" Mode");
301 break;
302 default:
303 (void)printf(" [type %d]", type);
304 break;
305 }
306 if ((bp[4] >> 4) != 1)
307 (void)printf(" [v%d]", bp[4] >> 4);
308 return;
309
310 trunc:
311 (void)printf("[|pim]");
312 return;
313 }
314
315 /*
316 * auto-RP is a cisco protocol, documented at
317 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
318 *
319 * This implements version 1+, dated Sept 9, 1998.
320 */
321 void
cisco_autorp_print(register const u_char * bp,register u_int len)322 cisco_autorp_print(register const u_char *bp, register u_int len)
323 {
324 int type;
325 int numrps;
326 int hold;
327
328 TCHECK(bp[0]);
329 (void)printf(" auto-rp ");
330 type = bp[0];
331 switch (type) {
332 case 0x11:
333 (void)printf("candidate-advert");
334 break;
335 case 0x12:
336 (void)printf("mapping");
337 break;
338 default:
339 (void)printf("type-0x%02x", type);
340 break;
341 }
342
343 TCHECK(bp[1]);
344 numrps = bp[1];
345
346 TCHECK2(bp[2], 2);
347 (void)printf(" Hold ");
348 hold = EXTRACT_16BITS(&bp[2]);
349 if (hold)
350 relts_print(EXTRACT_16BITS(&bp[2]));
351 else
352 printf("FOREVER");
353
354 /* Next 4 bytes are reserved. */
355
356 bp += 8; len -= 8;
357
358 /*XXX skip unless -v? */
359
360 /*
361 * Rest of packet:
362 * numrps entries of the form:
363 * 32 bits: RP
364 * 6 bits: reserved
365 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
366 * 8 bits: # of entries for this RP
367 * each entry: 7 bits: reserved, 1 bit: negative,
368 * 8 bits: mask 32 bits: source
369 * lather, rinse, repeat.
370 */
371 while (numrps--) {
372 int nentries;
373 char s;
374
375 TCHECK2(bp[0], 4);
376 (void)printf(" RP %s", ipaddr_string(bp));
377 TCHECK(bp[4]);
378 switch (bp[4] & 0x3) {
379 case 0: printf(" PIMv?");
380 break;
381 case 1: printf(" PIMv1");
382 break;
383 case 2: printf(" PIMv2");
384 break;
385 case 3: printf(" PIMv1+2");
386 break;
387 }
388 if (bp[4] & 0xfc)
389 (void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
390 TCHECK(bp[5]);
391 nentries = bp[5];
392 bp += 6; len -= 6;
393 s = ' ';
394 for (; nentries; nentries--) {
395 TCHECK2(bp[0], 6);
396 (void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
397 ipaddr_string(&bp[2]), bp[1]);
398 if (bp[0] & 0x02) {
399 (void)printf(" bidir");
400 }
401 if (bp[0] & 0xfc) {
402 (void)printf("[rsvd=0x%02x]", bp[0] & 0xfc);
403 }
404 s = ',';
405 bp += 6; len -= 6;
406 }
407 }
408 return;
409
410 trunc:
411 (void)printf("[|autorp]");
412 return;
413 }
414
415 void
pim_print(register const u_char * bp,register u_int len,u_int cksum)416 pim_print(register const u_char *bp, register u_int len, u_int cksum)
417 {
418 register const u_char *ep;
419 register struct pim *pim = (struct pim *)bp;
420
421 ep = (const u_char *)snapend;
422 if (bp >= ep)
423 return;
424 #ifdef notyet /* currently we see only version and type */
425 TCHECK(pim->pim_rsv);
426 #endif
427
428 switch (PIM_VER(pim->pim_typever)) {
429 case 2:
430 if (!vflag) {
431 printf("PIMv%u, %s, length %u",
432 PIM_VER(pim->pim_typever),
433 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
434 len);
435 return;
436 } else {
437 printf("PIMv%u, length %u\n\t%s",
438 PIM_VER(pim->pim_typever),
439 len,
440 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)));
441 pimv2_print(bp, len, cksum);
442 }
443 break;
444 default:
445 printf("PIMv%u, length %u",
446 PIM_VER(pim->pim_typever),
447 len);
448 break;
449 }
450 return;
451 }
452
453 /*
454 * PIMv2 uses encoded address representations.
455 *
456 * The last PIM-SM I-D before RFC2117 was published specified the
457 * following representation for unicast addresses. However, RFC2117
458 * specified no encoding for unicast addresses with the unicast
459 * address length specified in the header. Therefore, we have to
460 * guess which encoding is being used (Cisco's PIMv2 implementation
461 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
462 * field into a 'unicast-address-length-in-bytes' field. We guess
463 * that it's the draft encoding if this reserved field is zero.
464 *
465 * RFC2362 goes back to the encoded format, and calls the addr length
466 * field "reserved" again.
467 *
468 * The first byte is the address family, from:
469 *
470 * 0 Reserved
471 * 1 IP (IP version 4)
472 * 2 IP6 (IP version 6)
473 * 3 NSAP
474 * 4 HDLC (8-bit multidrop)
475 * 5 BBN 1822
476 * 6 802 (includes all 802 media plus Ethernet "canonical format")
477 * 7 E.163
478 * 8 E.164 (SMDS, Frame Relay, ATM)
479 * 9 F.69 (Telex)
480 * 10 X.121 (X.25, Frame Relay)
481 * 11 IPX
482 * 12 Appletalk
483 * 13 Decnet IV
484 * 14 Banyan Vines
485 * 15 E.164 with NSAP format subaddress
486 *
487 * In addition, the second byte is an "Encoding". 0 is the default
488 * encoding for the address family, and no other encodings are currently
489 * specified.
490 *
491 */
492
493 static int pimv2_addr_len;
494
495 enum pimv2_addrtype {
496 pimv2_unicast, pimv2_group, pimv2_source
497 };
498
499 /* 0 1 2 3
500 * 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
501 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
502 * | Addr Family | Encoding Type | Unicast Address |
503 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
504 * 0 1 2 3
505 * 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
506 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
507 * | Addr Family | Encoding Type | Reserved | Mask Len |
508 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
509 * | Group multicast Address |
510 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
511 * 0 1 2 3
512 * 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
513 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
514 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
515 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
516 * | Source Address |
517 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
518 */
519 static int
pimv2_addr_print(const u_char * bp,enum pimv2_addrtype at,int silent)520 pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
521 {
522 int af;
523 int len, hdrlen;
524
525 TCHECK(bp[0]);
526
527 if (pimv2_addr_len == 0) {
528 TCHECK(bp[1]);
529 switch (bp[0]) {
530 case 1:
531 af = AF_INET;
532 len = sizeof(struct in_addr);
533 break;
534 #ifdef INET6
535 case 2:
536 af = AF_INET6;
537 len = sizeof(struct in6_addr);
538 break;
539 #endif
540 default:
541 return -1;
542 }
543 if (bp[1] != 0)
544 return -1;
545 hdrlen = 2;
546 } else {
547 switch (pimv2_addr_len) {
548 case sizeof(struct in_addr):
549 af = AF_INET;
550 break;
551 #ifdef INET6
552 case sizeof(struct in6_addr):
553 af = AF_INET6;
554 break;
555 #endif
556 default:
557 return -1;
558 break;
559 }
560 len = pimv2_addr_len;
561 hdrlen = 0;
562 }
563
564 bp += hdrlen;
565 switch (at) {
566 case pimv2_unicast:
567 TCHECK2(bp[0], len);
568 if (af == AF_INET) {
569 if (!silent)
570 (void)printf("%s", ipaddr_string(bp));
571 }
572 #ifdef INET6
573 else if (af == AF_INET6) {
574 if (!silent)
575 (void)printf("%s", ip6addr_string(bp));
576 }
577 #endif
578 return hdrlen + len;
579 case pimv2_group:
580 case pimv2_source:
581 TCHECK2(bp[0], len + 2);
582 if (af == AF_INET) {
583 if (!silent) {
584 (void)printf("%s", ipaddr_string(bp + 2));
585 if (bp[1] != 32)
586 (void)printf("/%u", bp[1]);
587 }
588 }
589 #ifdef INET6
590 else if (af == AF_INET6) {
591 if (!silent) {
592 (void)printf("%s", ip6addr_string(bp + 2));
593 if (bp[1] != 128)
594 (void)printf("/%u", bp[1]);
595 }
596 }
597 #endif
598 if (bp[0] && !silent) {
599 if (at == pimv2_group) {
600 (void)printf("(0x%02x)", bp[0]);
601 } else {
602 (void)printf("(%s%s%s",
603 bp[0] & 0x04 ? "S" : "",
604 bp[0] & 0x02 ? "W" : "",
605 bp[0] & 0x01 ? "R" : "");
606 if (bp[0] & 0xf8) {
607 (void) printf("+0x%02x", bp[0] & 0xf8);
608 }
609 (void)printf(")");
610 }
611 }
612 return hdrlen + 2 + len;
613 default:
614 return -1;
615 }
616 trunc:
617 return -1;
618 }
619
620 static void
pimv2_print(register const u_char * bp,register u_int len,u_int cksum)621 pimv2_print(register const u_char *bp, register u_int len, u_int cksum)
622 {
623 register const u_char *ep;
624 register struct pim *pim = (struct pim *)bp;
625 int advance;
626
627 ep = (const u_char *)snapend;
628 if (bp >= ep)
629 return;
630 if (ep > bp + len)
631 ep = bp + len;
632 TCHECK(pim->pim_rsv);
633 pimv2_addr_len = pim->pim_rsv;
634 if (pimv2_addr_len != 0)
635 (void)printf(", RFC2117-encoding");
636
637 printf(", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum));
638 if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
639 printf("(unverified)");
640 } else {
641 printf("(%scorrect)", TTEST2(bp[0], len) && cksum ? "in" : "" );
642 }
643
644 switch (PIM_TYPE(pim->pim_typever)) {
645 case PIMV2_TYPE_HELLO:
646 {
647 u_int16_t otype, olen;
648 bp += 4;
649 while (bp < ep) {
650 TCHECK2(bp[0], 4);
651 otype = EXTRACT_16BITS(&bp[0]);
652 olen = EXTRACT_16BITS(&bp[2]);
653 TCHECK2(bp[0], 4 + olen);
654
655 printf("\n\t %s Option (%u), length %u, Value: ",
656 tok2str( pimv2_hello_option_values,"Unknown",otype),
657 otype,
658 olen);
659 bp += 4;
660
661 switch (otype) {
662 case PIMV2_HELLO_OPTION_HOLDTIME:
663 relts_print(EXTRACT_16BITS(bp));
664 break;
665
666 case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
667 if (olen != 4) {
668 (void)printf("ERROR: Option Length != 4 Bytes (%u)", olen);
669 } else {
670 char t_bit;
671 u_int16_t lan_delay, override_interval;
672 lan_delay = EXTRACT_16BITS(bp);
673 override_interval = EXTRACT_16BITS(bp+2);
674 t_bit = (lan_delay & 0x8000)? 1 : 0;
675 lan_delay &= ~0x8000;
676 (void)printf("\n\t T-bit=%d, LAN delay %dms, Override interval %dms",
677 t_bit, lan_delay, override_interval);
678 }
679 break;
680
681 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
682 case PIMV2_HELLO_OPTION_DR_PRIORITY:
683 switch (olen) {
684 case 0:
685 printf("Bi-Directional Capability (Old)");
686 break;
687 case 4:
688 printf("%u", EXTRACT_32BITS(bp));
689 break;
690 default:
691 printf("ERROR: Option Length != 4 Bytes (%u)", olen);
692 break;
693 }
694 break;
695
696 case PIMV2_HELLO_OPTION_GENID:
697 (void)printf("0x%08x", EXTRACT_32BITS(bp));
698 break;
699
700 case PIMV2_HELLO_OPTION_REFRESH_CAP:
701 (void)printf("v%d", *bp);
702 if (*(bp+1) != 0) {
703 (void)printf(", interval ");
704 relts_print(*(bp+1));
705 }
706 if (EXTRACT_16BITS(bp+2) != 0) {
707 (void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
708 }
709 break;
710
711 case PIMV2_HELLO_OPTION_BIDIR_CAP:
712 break;
713
714 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
715 case PIMV2_HELLO_OPTION_ADDRESS_LIST:
716 if (vflag > 1) {
717 const u_char *ptr = bp;
718 while (ptr < (bp+olen)) {
719 int advance;
720
721 printf("\n\t ");
722 advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
723 if (advance < 0) {
724 printf("...");
725 break;
726 }
727 ptr += advance;
728 }
729 }
730 break;
731 default:
732 if (vflag <= 1)
733 print_unknown_data(bp,"\n\t ",olen);
734 break;
735 }
736 /* do we want to see an additionally hexdump ? */
737 if (vflag> 1)
738 print_unknown_data(bp,"\n\t ",olen);
739 bp += olen;
740 }
741 break;
742 }
743
744 case PIMV2_TYPE_REGISTER:
745 {
746 struct ip *ip;
747
748 if (!TTEST2(*(bp+4), PIMV2_REGISTER_FLAG_LEN))
749 goto trunc;
750
751 printf(", Flags [ %s ]\n\t",
752 tok2str(pimv2_register_flag_values,
753 "none",
754 EXTRACT_32BITS(bp+4)));
755
756 bp += 8; len -= 8;
757 /* encapsulated multicast packet */
758 ip = (struct ip *)bp;
759 switch (IP_V(ip)) {
760 case 0: /* Null header */
761 (void)printf("IP-Null-header %s > %s",
762 ipaddr_string(&ip->ip_src),
763 ipaddr_string(&ip->ip_dst));
764 break;
765
766 case 4: /* IPv4 */
767 ip_print(gndo, bp, len);
768 break;
769 #ifdef INET6
770 case 6: /* IPv6 */
771 ip6_print(gndo, bp, len);
772 break;
773 #endif
774 default:
775 (void)printf("IP ver %d", IP_V(ip));
776 break;
777 }
778 break;
779 }
780
781 case PIMV2_TYPE_REGISTER_STOP:
782 bp += 4; len -= 4;
783 if (bp >= ep)
784 break;
785 (void)printf(" group=");
786 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
787 (void)printf("...");
788 break;
789 }
790 bp += advance; len -= advance;
791 if (bp >= ep)
792 break;
793 (void)printf(" source=");
794 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
795 (void)printf("...");
796 break;
797 }
798 bp += advance; len -= advance;
799 break;
800
801 case PIMV2_TYPE_JOIN_PRUNE:
802 case PIMV2_TYPE_GRAFT:
803 case PIMV2_TYPE_GRAFT_ACK:
804
805
806 /*
807 * 0 1 2 3
808 * 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
809 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
810 * |PIM Ver| Type | Addr length | Checksum |
811 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
812 * | Unicast-Upstream Neighbor Address |
813 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
814 * | Reserved | Num groups | Holdtime |
815 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
816 * | Encoded-Multicast Group Address-1 |
817 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
818 * | Number of Joined Sources | Number of Pruned Sources |
819 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
820 * | Encoded-Joined Source Address-1 |
821 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
822 * | . |
823 * | . |
824 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
825 * | Encoded-Joined Source Address-n |
826 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
827 * | Encoded-Pruned Source Address-1 |
828 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
829 * | . |
830 * | . |
831 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
832 * | Encoded-Pruned Source Address-n |
833 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
834 * | . |
835 * | . |
836 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
837 * | Encoded-Multicast Group Address-n |
838 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
839 */
840
841 {
842 u_int8_t ngroup;
843 u_int16_t holdtime;
844 u_int16_t njoin;
845 u_int16_t nprune;
846 int i, j;
847
848 bp += 4; len -= 4;
849 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
850 if (bp >= ep)
851 break;
852 (void)printf(", upstream-neighbor: ");
853 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
854 (void)printf("...");
855 break;
856 }
857 bp += advance; len -= advance;
858 }
859 if (bp + 4 > ep)
860 break;
861 ngroup = bp[1];
862 holdtime = EXTRACT_16BITS(&bp[2]);
863 (void)printf("\n\t %u group(s)", ngroup);
864 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
865 (void)printf(", holdtime: ");
866 if (holdtime == 0xffff)
867 (void)printf("infinite");
868 else
869 relts_print(holdtime);
870 }
871 bp += 4; len -= 4;
872 for (i = 0; i < ngroup; i++) {
873 if (bp >= ep)
874 goto jp_done;
875 (void)printf("\n\t group #%u: ", i+1);
876 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
877 (void)printf("...)");
878 goto jp_done;
879 }
880 bp += advance; len -= advance;
881 if (bp + 4 > ep) {
882 (void)printf("...)");
883 goto jp_done;
884 }
885 njoin = EXTRACT_16BITS(&bp[0]);
886 nprune = EXTRACT_16BITS(&bp[2]);
887 (void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
888 bp += 4; len -= 4;
889 for (j = 0; j < njoin; j++) {
890 (void)printf("\n\t joined source #%u: ",j+1);
891 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
892 (void)printf("...)");
893 goto jp_done;
894 }
895 bp += advance; len -= advance;
896 }
897 for (j = 0; j < nprune; j++) {
898 (void)printf("\n\t pruned source #%u: ",j+1);
899 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
900 (void)printf("...)");
901 goto jp_done;
902 }
903 bp += advance; len -= advance;
904 }
905 }
906 jp_done:
907 break;
908 }
909
910 case PIMV2_TYPE_BOOTSTRAP:
911 {
912 int i, j, frpcnt;
913 bp += 4;
914
915 /* Fragment Tag, Hash Mask len, and BSR-priority */
916 if (bp + sizeof(u_int16_t) >= ep) break;
917 (void)printf(" tag=%x", EXTRACT_16BITS(bp));
918 bp += sizeof(u_int16_t);
919 if (bp >= ep) break;
920 (void)printf(" hashmlen=%d", bp[0]);
921 if (bp + 1 >= ep) break;
922 (void)printf(" BSRprio=%d", bp[1]);
923 bp += 2;
924
925 /* Encoded-Unicast-BSR-Address */
926 if (bp >= ep) break;
927 (void)printf(" BSR=");
928 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
929 (void)printf("...");
930 break;
931 }
932 bp += advance;
933
934 for (i = 0; bp < ep; i++) {
935 /* Encoded-Group Address */
936 (void)printf(" (group%d: ", i);
937 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
938 < 0) {
939 (void)printf("...)");
940 goto bs_done;
941 }
942 bp += advance;
943
944 /* RP-Count, Frag RP-Cnt, and rsvd */
945 if (bp >= ep) {
946 (void)printf("...)");
947 goto bs_done;
948 }
949 (void)printf(" RPcnt=%d", bp[0]);
950 if (bp + 1 >= ep) {
951 (void)printf("...)");
952 goto bs_done;
953 }
954 (void)printf(" FRPcnt=%d", frpcnt = bp[1]);
955 bp += 4;
956
957 for (j = 0; j < frpcnt && bp < ep; j++) {
958 /* each RP info */
959 (void)printf(" RP%d=", j);
960 if ((advance = pimv2_addr_print(bp,
961 pimv2_unicast,
962 0)) < 0) {
963 (void)printf("...)");
964 goto bs_done;
965 }
966 bp += advance;
967
968 if (bp + 1 >= ep) {
969 (void)printf("...)");
970 goto bs_done;
971 }
972 (void)printf(",holdtime=");
973 relts_print(EXTRACT_16BITS(bp));
974 if (bp + 2 >= ep) {
975 (void)printf("...)");
976 goto bs_done;
977 }
978 (void)printf(",prio=%d", bp[2]);
979 bp += 4;
980 }
981 (void)printf(")");
982 }
983 bs_done:
984 break;
985 }
986 case PIMV2_TYPE_ASSERT:
987 bp += 4; len -= 4;
988 if (bp >= ep)
989 break;
990 (void)printf(" group=");
991 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
992 (void)printf("...");
993 break;
994 }
995 bp += advance; len -= advance;
996 if (bp >= ep)
997 break;
998 (void)printf(" src=");
999 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1000 (void)printf("...");
1001 break;
1002 }
1003 bp += advance; len -= advance;
1004 if (bp + 8 > ep)
1005 break;
1006 if (bp[0] & 0x80)
1007 (void)printf(" RPT");
1008 (void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
1009 (void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
1010 break;
1011
1012 case PIMV2_TYPE_CANDIDATE_RP:
1013 {
1014 int i, pfxcnt;
1015 bp += 4;
1016
1017 /* Prefix-Cnt, Priority, and Holdtime */
1018 if (bp >= ep) break;
1019 (void)printf(" prefix-cnt=%d", bp[0]);
1020 pfxcnt = bp[0];
1021 if (bp + 1 >= ep) break;
1022 (void)printf(" prio=%d", bp[1]);
1023 if (bp + 3 >= ep) break;
1024 (void)printf(" holdtime=");
1025 relts_print(EXTRACT_16BITS(&bp[2]));
1026 bp += 4;
1027
1028 /* Encoded-Unicast-RP-Address */
1029 if (bp >= ep) break;
1030 (void)printf(" RP=");
1031 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1032 (void)printf("...");
1033 break;
1034 }
1035 bp += advance;
1036
1037 /* Encoded-Group Addresses */
1038 for (i = 0; i < pfxcnt && bp < ep; i++) {
1039 (void)printf(" Group%d=", i);
1040 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
1041 < 0) {
1042 (void)printf("...");
1043 break;
1044 }
1045 bp += advance;
1046 }
1047 break;
1048 }
1049
1050 case PIMV2_TYPE_PRUNE_REFRESH:
1051 (void)printf(" src=");
1052 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1053 (void)printf("...");
1054 break;
1055 }
1056 bp += advance;
1057 (void)printf(" grp=");
1058 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
1059 (void)printf("...");
1060 break;
1061 }
1062 bp += advance;
1063 (void)printf(" forwarder=");
1064 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1065 (void)printf("...");
1066 break;
1067 }
1068 bp += advance;
1069 TCHECK2(bp[0], 2);
1070 (void)printf(" TUNR ");
1071 relts_print(EXTRACT_16BITS(bp));
1072 break;
1073
1074
1075 default:
1076 (void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
1077 break;
1078 }
1079
1080 return;
1081
1082 trunc:
1083 (void)printf("[|pim]");
1084 }
1085
1086 /*
1087 * Local Variables:
1088 * c-style: whitesmith
1089 * c-basic-offset: 8
1090 * End:
1091 */
1092