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Add bounds checks.
[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 1.37.2.4 2004-03-24 02:52:37 guy Exp $ (LBL)";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <tcpdump-stdinc.h>
32
33 /*
34 * XXX: We consider a case where IPv6 is not ready yet for portability,
35 * but PIM dependent defintions should be independent of IPv6...
36 */
37
38 struct pim {
39 u_int8_t pim_typever;
40 /* upper 4bit: PIM version number; 2 for PIMv2 */
41 /* lower 4bit: the PIM message type, currently they are:
42 * Hello, Register, Register-Stop, Join/Prune,
43 * Bootstrap, Assert, Graft (PIM-DM only),
44 * Graft-Ack (PIM-DM only), C-RP-Adv
45 */
46 #define PIM_VER(x) (((x) & 0xf0) >> 4)
47 #define PIM_TYPE(x) ((x) & 0x0f)
48 u_char pim_rsv; /* Reserved */
49 u_short pim_cksum; /* IP style check sum */
50 };
51
52
53 #include <stdio.h>
54 #include <stdlib.h>
55
56 #include "interface.h"
57 #include "addrtoname.h"
58 #include "extract.h"
59
60 #include "ip.h"
61
62 static void pimv2_print(register const u_char *bp, register u_int len);
63
64 static void
65 pimv1_join_prune_print(register const u_char *bp, register u_int len)
66 {
67 int maddrlen, addrlen, ngroups, njoin, nprune;
68 int njp;
69
70 /* If it's a single group and a single source, use 1-line output. */
71 if (TTEST2(bp[0], 30) && bp[11] == 1 &&
72 ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
73 int hold;
74
75 (void)printf(" RPF %s ", ipaddr_string(bp));
76 hold = EXTRACT_16BITS(&bp[6]);
77 if (hold != 180) {
78 (void)printf("Hold ");
79 relts_print(hold);
80 }
81 (void)printf("%s (%s/%d, %s", njoin ? "Join" : "Prune",
82 ipaddr_string(&bp[26]), bp[25] & 0x3f,
83 ipaddr_string(&bp[12]));
84 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
85 (void)printf("/%s", ipaddr_string(&bp[16]));
86 (void)printf(") %s%s %s",
87 (bp[24] & 0x01) ? "Sparse" : "Dense",
88 (bp[25] & 0x80) ? " WC" : "",
89 (bp[25] & 0x40) ? "RP" : "SPT");
90 return;
91 }
92
93 TCHECK2(bp[0], 4);
94 if (vflag > 1)
95 (void)printf("\n");
96 (void)printf(" Upstream Nbr: %s", ipaddr_string(bp));
97 TCHECK2(bp[6], 2);
98 if (vflag > 1)
99 (void)printf("\n");
100 (void)printf(" Hold time: ");
101 relts_print(EXTRACT_16BITS(&bp[6]));
102 if (vflag < 2)
103 return;
104 bp += 8;
105 len -= 8;
106
107 TCHECK2(bp[0], 4);
108 maddrlen = bp[1];
109 addrlen = bp[2];
110 ngroups = bp[3];
111 bp += 4;
112 len -= 4;
113 while (ngroups--) {
114 TCHECK2(bp[0], 4);
115 (void)printf("\n\tGroup: %s", ipaddr_string(bp));
116 TCHECK2(bp[4], 4);
117 if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
118 (void)printf("/%s", ipaddr_string(&bp[4]));
119 TCHECK2(bp[8], 4);
120 njoin = EXTRACT_16BITS(&bp[8]);
121 nprune = EXTRACT_16BITS(&bp[10]);
122 (void)printf(" joined: %d pruned: %d", njoin, nprune);
123 bp += 12;
124 len -= 12;
125 for (njp = 0; njp < (njoin + nprune); njp++) {
126 const char *type;
127
128 if (njp < njoin)
129 type = "Join ";
130 else
131 type = "Prune";
132 TCHECK2(bp[0], 6);
133 (void)printf("\n\t%s %s%s%s%s/%d", type,
134 (bp[0] & 0x01) ? "Sparse " : "Dense ",
135 (bp[1] & 0x80) ? "WC " : "",
136 (bp[1] & 0x40) ? "RP " : "SPT ",
137 ipaddr_string(&bp[2]), bp[1] & 0x3f);
138 bp += 6;
139 len -= 6;
140 }
141 }
142 return;
143 trunc:
144 (void)printf("[|pim]");
145 return;
146 }
147
148 void
149 pimv1_print(register const u_char *bp, register u_int len)
150 {
151 register const u_char *ep;
152 register u_char type;
153
154 ep = (const u_char *)snapend;
155 if (bp >= ep)
156 return;
157
158 TCHECK(bp[1]);
159 type = bp[1];
160
161 switch (type) {
162 case 0:
163 (void)printf(" Query");
164 if (TTEST(bp[8])) {
165 switch (bp[8] >> 4) {
166 case 0:
167 (void)printf(" Dense-mode");
168 break;
169 case 1:
170 (void)printf(" Sparse-mode");
171 break;
172 case 2:
173 (void)printf(" Sparse-Dense-mode");
174 break;
175 default:
176 (void)printf(" mode-%d", bp[8] >> 4);
177 break;
178 }
179 }
180 if (vflag) {
181 TCHECK2(bp[10],2);
182 (void)printf(" (Hold-time ");
183 relts_print(EXTRACT_16BITS(&bp[10]));
184 (void)printf(")");
185 }
186 break;
187
188 case 1:
189 (void)printf(" Register");
190 TCHECK2(bp[8], 20); /* ip header */
191 (void)printf(" for %s > %s", ipaddr_string(&bp[20]),
192 ipaddr_string(&bp[24]));
193 break;
194 case 2:
195 (void)printf(" Register-Stop");
196 TCHECK2(bp[12], 4);
197 (void)printf(" for %s > %s", ipaddr_string(&bp[8]),
198 ipaddr_string(&bp[12]));
199 break;
200 case 3:
201 (void)printf(" Join/Prune");
202 if (vflag)
203 pimv1_join_prune_print(&bp[8], len - 8);
204 break;
205 case 4:
206 (void)printf(" RP-reachable");
207 if (vflag) {
208 TCHECK2(bp[22], 2);
209 (void)printf(" group %s",
210 ipaddr_string(&bp[8]));
211 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
212 (void)printf("/%s", ipaddr_string(&bp[12]));
213 (void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
214 relts_print(EXTRACT_16BITS(&bp[22]));
215 }
216 break;
217 case 5:
218 (void)printf(" Assert");
219 TCHECK2(bp[16], 4);
220 (void)printf(" for %s > %s", ipaddr_string(&bp[16]),
221 ipaddr_string(&bp[8]));
222 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
223 (void)printf("/%s", ipaddr_string(&bp[12]));
224 TCHECK2(bp[24], 4);
225 (void)printf(" %s pref %d metric %d",
226 (bp[20] & 0x80) ? "RP-tree" : "SPT",
227 EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
228 EXTRACT_32BITS(&bp[24]));
229 break;
230 case 6:
231 (void)printf(" Graft");
232 if (vflag)
233 pimv1_join_prune_print(&bp[8], len - 8);
234 break;
235 case 7:
236 (void)printf(" Graft-ACK");
237 if (vflag)
238 pimv1_join_prune_print(&bp[8], len - 8);
239 break;
240 case 8:
241 (void)printf(" Mode");
242 break;
243 default:
244 (void)printf(" [type %d]", type);
245 break;
246 }
247 if ((bp[4] >> 4) != 1)
248 (void)printf(" [v%d]", bp[4] >> 4);
249 return;
250
251 trunc:
252 (void)printf("[|pim]");
253 return;
254 }
255
256 /*
257 * auto-RP is a cisco protocol, documented at
258 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
259 *
260 * This implements version 1+, dated Sept 9, 1998.
261 */
262 void
263 cisco_autorp_print(register const u_char *bp, register u_int len)
264 {
265 int type;
266 int numrps;
267 int hold;
268
269 TCHECK(bp[0]);
270 (void)printf(" auto-rp ");
271 type = bp[0];
272 switch (type) {
273 case 0x11:
274 (void)printf("candidate-advert");
275 break;
276 case 0x12:
277 (void)printf("mapping");
278 break;
279 default:
280 (void)printf("type-0x%02x", type);
281 break;
282 }
283
284 TCHECK(bp[1]);
285 numrps = bp[1];
286
287 TCHECK2(bp[2], 2);
288 (void)printf(" Hold ");
289 hold = EXTRACT_16BITS(&bp[2]);
290 if (hold)
291 relts_print(EXTRACT_16BITS(&bp[2]));
292 else
293 printf("FOREVER");
294
295 /* Next 4 bytes are reserved. */
296
297 bp += 8; len -= 8;
298
299 /*XXX skip unless -v? */
300
301 /*
302 * Rest of packet:
303 * numrps entries of the form:
304 * 32 bits: RP
305 * 6 bits: reserved
306 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
307 * 8 bits: # of entries for this RP
308 * each entry: 7 bits: reserved, 1 bit: negative,
309 * 8 bits: mask 32 bits: source
310 * lather, rinse, repeat.
311 */
312 while (numrps--) {
313 int nentries;
314 char s;
315
316 TCHECK2(bp[0], 4);
317 (void)printf(" RP %s", ipaddr_string(bp));
318 TCHECK(bp[4]);
319 switch (bp[4] & 0x3) {
320 case 0: printf(" PIMv?");
321 break;
322 case 1: printf(" PIMv1");
323 break;
324 case 2: printf(" PIMv2");
325 break;
326 case 3: printf(" PIMv1+2");
327 break;
328 }
329 if (bp[4] & 0xfc)
330 (void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
331 TCHECK(bp[5]);
332 nentries = bp[5];
333 bp += 6; len -= 6;
334 s = ' ';
335 for (; nentries; nentries--) {
336 TCHECK2(bp[0], 6);
337 (void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
338 ipaddr_string(&bp[2]), bp[1]);
339 if (bp[0] & 0xfe)
340 (void)printf("[rsvd=0x%02x]", bp[0] & 0xfe);
341 s = ',';
342 bp += 6; len -= 6;
343 }
344 }
345 return;
346
347 trunc:
348 (void)printf("[|autorp]");
349 return;
350 }
351
352 void
353 pim_print(register const u_char *bp, register u_int len)
354 {
355 register const u_char *ep;
356 register struct pim *pim = (struct pim *)bp;
357
358 ep = (const u_char *)snapend;
359 if (bp >= ep)
360 return;
361 #ifdef notyet /* currently we see only version and type */
362 TCHECK(pim->pim_rsv);
363 #endif
364
365 switch (PIM_VER(pim->pim_typever)) {
366 case 2: /* avoid hardcoding? */
367 (void)printf("pim v2");
368 pimv2_print(bp, len);
369 break;
370 default:
371 (void)printf("pim v%d", PIM_VER(pim->pim_typever));
372 break;
373 }
374 return;
375 }
376
377 /*
378 * PIMv2 uses encoded address representations.
379 *
380 * The last PIM-SM I-D before RFC2117 was published specified the
381 * following representation for unicast addresses. However, RFC2117
382 * specified no encoding for unicast addresses with the unicast
383 * address length specified in the header. Therefore, we have to
384 * guess which encoding is being used (Cisco's PIMv2 implementation
385 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
386 * field into a 'unicast-address-length-in-bytes' field. We guess
387 * that it's the draft encoding if this reserved field is zero.
388 *
389 * RFC2362 goes back to the encoded format, and calls the addr length
390 * field "reserved" again.
391 *
392 * The first byte is the address family, from:
393 *
394 * 0 Reserved
395 * 1 IP (IP version 4)
396 * 2 IP6 (IP version 6)
397 * 3 NSAP
398 * 4 HDLC (8-bit multidrop)
399 * 5 BBN 1822
400 * 6 802 (includes all 802 media plus Ethernet "canonical format")
401 * 7 E.163
402 * 8 E.164 (SMDS, Frame Relay, ATM)
403 * 9 F.69 (Telex)
404 * 10 X.121 (X.25, Frame Relay)
405 * 11 IPX
406 * 12 Appletalk
407 * 13 Decnet IV
408 * 14 Banyan Vines
409 * 15 E.164 with NSAP format subaddress
410 *
411 * In addition, the second byte is an "Encoding". 0 is the default
412 * encoding for the address family, and no other encodings are currently
413 * specified.
414 *
415 */
416
417 static int pimv2_addr_len;
418
419 enum pimv2_addrtype {
420 pimv2_unicast, pimv2_group, pimv2_source
421 };
422
423 /* 0 1 2 3
424 * 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
425 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
426 * | Addr Family | Encoding Type | Unicast Address |
427 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
428 * 0 1 2 3
429 * 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
430 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
431 * | Addr Family | Encoding Type | Reserved | Mask Len |
432 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
433 * | Group multicast Address |
434 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
435 * 0 1 2 3
436 * 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
437 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
438 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
439 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
440 * | Source Address |
441 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
442 */
443 static int
444 pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
445 {
446 int af;
447 const char *afstr;
448 int len, hdrlen;
449
450 TCHECK(bp[0]);
451
452 if (pimv2_addr_len == 0) {
453 TCHECK(bp[1]);
454 switch (bp[0]) {
455 case 1:
456 af = AF_INET;
457 afstr = "IPv4";
458 len = 4;
459 break;
460 #ifdef INET6
461 case 2:
462 af = AF_INET6;
463 afstr = "IPv6";
464 len = 16;
465 break;
466 #endif
467 default:
468 return -1;
469 }
470 if (bp[1] != 0)
471 return -1;
472 hdrlen = 2;
473 } else {
474 switch (pimv2_addr_len) {
475 case 4:
476 af = AF_INET;
477 afstr = "IPv4";
478 break;
479 #ifdef INET6
480 case 16:
481 af = AF_INET6;
482 afstr = "IPv6";
483 break;
484 #endif
485 default:
486 return -1;
487 break;
488 }
489 len = pimv2_addr_len;
490 hdrlen = 0;
491 }
492
493 bp += hdrlen;
494 switch (at) {
495 case pimv2_unicast:
496 TCHECK2(bp[0], len);
497 if (af == AF_INET) {
498 if (!silent)
499 (void)printf("%s", ipaddr_string(bp));
500 }
501 #ifdef INET6
502 else if (af == AF_INET6) {
503 if (!silent)
504 (void)printf("%s", ip6addr_string(bp));
505 }
506 #endif
507 return hdrlen + len;
508 case pimv2_group:
509 case pimv2_source:
510 TCHECK2(bp[0], len + 2);
511 if (af == AF_INET) {
512 if (!silent) {
513 (void)printf("%s", ipaddr_string(bp + 2));
514 if (bp[1] != 32)
515 (void)printf("/%u", bp[1]);
516 }
517 }
518 #ifdef INET6
519 else if (af == AF_INET6) {
520 if (!silent) {
521 (void)printf("%s", ip6addr_string(bp + 2));
522 if (bp[1] != 128)
523 (void)printf("/%u", bp[1]);
524 }
525 }
526 #endif
527 if (bp[0] && !silent) {
528 if (at == pimv2_group) {
529 (void)printf("(0x%02x)", bp[0]);
530 } else {
531 (void)printf("(%s%s%s",
532 bp[0] & 0x04 ? "S" : "",
533 bp[0] & 0x02 ? "W" : "",
534 bp[0] & 0x01 ? "R" : "");
535 if (bp[0] & 0xf8) {
536 (void) printf("+0x%02x", bp[0] & 0xf8);
537 }
538 (void)printf(")");
539 }
540 }
541 return hdrlen + 2 + len;
542 default:
543 return -1;
544 }
545 trunc:
546 return -1;
547 }
548
549 static void
550 pimv2_print(register const u_char *bp, register u_int len)
551 {
552 register const u_char *ep;
553 register struct pim *pim = (struct pim *)bp;
554 int advance;
555
556 ep = (const u_char *)snapend;
557 if (bp >= ep)
558 return;
559 if (ep > bp + len)
560 ep = bp + len;
561 TCHECK(pim->pim_rsv);
562 pimv2_addr_len = pim->pim_rsv;
563 if (pimv2_addr_len != 0)
564 (void)printf("[RFC2117-encoding] ");
565
566 switch (PIM_TYPE(pim->pim_typever)) {
567 case 0:
568 {
569 u_int16_t otype, olen;
570 (void)printf(" Hello");
571 bp += 4;
572 while (bp < ep) {
573 TCHECK2(bp[0], 4);
574 otype = EXTRACT_16BITS(&bp[0]);
575 olen = EXTRACT_16BITS(&bp[2]);
576 TCHECK2(bp[0], 4 + olen);
577 switch (otype) {
578 case 1: /* Hold time */
579 (void)printf(" (Hold-time ");
580 relts_print(EXTRACT_16BITS(&bp[4]));
581 (void)printf(")");
582 break;
583
584 case 2: /* LAN Prune Delay */
585 (void)printf(" (LAN-Prune-Delay: ");
586 if (olen != 4) {
587 (void)printf("!olen=%d!)", olen);
588 } else {
589 char t_bit;
590 u_int16_t lan_delay, override_interval;
591 lan_delay = EXTRACT_16BITS(&bp[4]);
592 override_interval = EXTRACT_16BITS(&bp[6]);
593 t_bit = (lan_delay & 0x8000)? 1 : 0;
594 lan_delay &= ~0x8000;
595 (void)printf("T-bit=%d lan-delay=%dms override-interval=%dms)",
596 t_bit, lan_delay, override_interval);
597 }
598 break;
599
600 case 18: /* Old DR-Priority */
601 if (olen == 4)
602 (void)printf(" (OLD-DR-Priority: %d)",
603 EXTRACT_32BITS(&bp[4]));
604 else
605 goto unknown;
606 break;
607
608
609 case 19: /* DR-Priority */
610 if (olen == 0) {
611 (void)printf(" (OLD-bidir-capable)");
612 break;
613 }
614 (void)printf(" (DR-Priority: ");
615 if (olen != 4) {
616 (void)printf("!olen=%d!)", olen);
617 } else {
618 (void)printf("%d)", EXTRACT_32BITS(&bp[4]));
619 }
620 break;
621
622 case 20:
623 (void)printf(" (Genid: 0x%08x)", EXTRACT_32BITS(&bp[4]));
624 break;
625
626 case 21:
627 (void)printf(" (State Refresh Capable; v%d", bp[4]);
628 if (bp[5] != 0) {
629 (void)printf(" interval ");
630 relts_print(bp[5]);
631 }
632 if (EXTRACT_16BITS(&bp[6]) != 0) {
633 (void)printf(" ?0x%04x?", EXTRACT_16BITS(&bp[6]));
634 }
635 (void)printf(")");
636 break;
637
638 case 22: /* Bidir-Capable */
639 (void)printf(" (bidir-capable)");
640 break;
641
642 case 24: /* Address List */
643 case 65001: /* Address List (old implementations) */
644 (void)printf(" (%saddr-list",
645 otype == 65001 ? "old" : "");
646 if (vflag > 1) {
647 const u_char *ptr = &bp[4];
648 while (ptr < &bp[4 + olen]) {
649 int advance;
650
651 printf(" ");
652 advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
653 if (advance < 0) {
654 printf("...");
655 break;
656 }
657 ptr += advance;
658 }
659 }
660 (void)printf(")");
661 break;
662 default:
663 unknown:
664 if (vflag)
665 (void)printf(" [Hello option %d]", otype);
666 }
667 bp += 4 + olen;
668 }
669 break;
670 }
671
672 case 1:
673 {
674 struct ip *ip;
675
676 (void)printf(" Register");
677 if (vflag && bp + 8 <= ep) {
678 (void)printf(" %s%s", bp[4] & 0x80 ? "B" : "",
679 bp[4] & 0x40 ? "N" : "");
680 }
681 bp += 8; len -= 8;
682
683 /* encapsulated multicast packet */
684 if (bp >= ep)
685 break;
686 ip = (struct ip *)bp;
687 switch (IP_V(ip)) {
688 case 4: /* IPv4 */
689 printf(" ");
690 ip_print(bp, len);
691 break;
692 #ifdef INET6
693 case 6: /* IPv6 */
694 printf(" ");
695 ip6_print(bp, len);
696 break;
697 #endif
698 default:
699 (void)printf(" IP ver %d", IP_V(ip));
700 break;
701 }
702 break;
703 }
704
705 case 2:
706 (void)printf(" Register-Stop");
707 bp += 4; len -= 4;
708 if (bp >= ep)
709 break;
710 (void)printf(" group=");
711 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
712 (void)printf("...");
713 break;
714 }
715 bp += advance; len -= advance;
716 if (bp >= ep)
717 break;
718 (void)printf(" source=");
719 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
720 (void)printf("...");
721 break;
722 }
723 bp += advance; len -= advance;
724 break;
725
726 case 3:
727 case 6:
728 case 7:
729 {
730 u_int8_t ngroup;
731 u_int16_t holdtime;
732 u_int16_t njoin;
733 u_int16_t nprune;
734 int i, j;
735
736 switch (PIM_TYPE(pim->pim_typever)) {
737 case 3:
738 (void)printf(" Join/Prune");
739 break;
740 case 6:
741 (void)printf(" Graft");
742 break;
743 case 7:
744 (void)printf(" Graft-ACK");
745 break;
746 }
747 bp += 4; len -= 4;
748 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
749 if (bp >= ep)
750 break;
751 (void)printf(" upstream-neighbor=");
752 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
753 (void)printf("...");
754 break;
755 }
756 bp += advance; len -= advance;
757 }
758 if (bp + 4 > ep)
759 break;
760 ngroup = bp[1];
761 holdtime = EXTRACT_16BITS(&bp[2]);
762 (void)printf(" groups=%u", ngroup);
763 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
764 (void)printf(" holdtime=");
765 if (holdtime == 0xffff)
766 (void)printf("infty");
767 else
768 relts_print(holdtime);
769 }
770 bp += 4; len -= 4;
771 for (i = 0; i < ngroup; i++) {
772 if (bp >= ep)
773 goto jp_done;
774 (void)printf(" (group%d: ", i);
775 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
776 (void)printf("...)");
777 goto jp_done;
778 }
779 bp += advance; len -= advance;
780 if (bp + 4 > ep) {
781 (void)printf("...)");
782 goto jp_done;
783 }
784 njoin = EXTRACT_16BITS(&bp[0]);
785 nprune = EXTRACT_16BITS(&bp[2]);
786 (void)printf(" join=%u", njoin);
787 bp += 4; len -= 4;
788 for (j = 0; j < njoin; j++) {
789 (void)printf(" ");
790 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
791 (void)printf("...)");
792 goto jp_done;
793 }
794 bp += advance; len -= advance;
795 }
796 (void)printf(" prune=%u", nprune);
797 for (j = 0; j < nprune; j++) {
798 (void)printf(" ");
799 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
800 (void)printf("...)");
801 goto jp_done;
802 }
803 bp += advance; len -= advance;
804 }
805 (void)printf(")");
806 }
807 jp_done:
808 break;
809 }
810
811 case 4:
812 {
813 int i, j, frpcnt;
814
815 (void)printf(" Bootstrap");
816 bp += 4;
817
818 /* Fragment Tag, Hash Mask len, and BSR-priority */
819 if (bp + sizeof(u_int16_t) >= ep) break;
820 (void)printf(" tag=%x", EXTRACT_16BITS(bp));
821 bp += sizeof(u_int16_t);
822 if (bp >= ep) break;
823 (void)printf(" hashmlen=%d", bp[0]);
824 if (bp + 1 >= ep) break;
825 (void)printf(" BSRprio=%d", bp[1]);
826 bp += 2;
827
828 /* Encoded-Unicast-BSR-Address */
829 if (bp >= ep) break;
830 (void)printf(" BSR=");
831 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
832 (void)printf("...");
833 break;
834 }
835 bp += advance;
836
837 for (i = 0; bp < ep; i++) {
838 /* Encoded-Group Address */
839 (void)printf(" (group%d: ", i);
840 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
841 < 0) {
842 (void)printf("...)");
843 goto bs_done;
844 }
845 bp += advance;
846
847 /* RP-Count, Frag RP-Cnt, and rsvd */
848 if (bp >= ep) {
849 (void)printf("...)");
850 goto bs_done;
851 }
852 (void)printf(" RPcnt=%d", bp[0]);
853 if (bp + 1 >= ep) {
854 (void)printf("...)");
855 goto bs_done;
856 }
857 (void)printf(" FRPcnt=%d", frpcnt = bp[1]);
858 bp += 4;
859
860 for (j = 0; j < frpcnt && bp < ep; j++) {
861 /* each RP info */
862 (void)printf(" RP%d=", j);
863 if ((advance = pimv2_addr_print(bp,
864 pimv2_unicast,
865 0)) < 0) {
866 (void)printf("...)");
867 goto bs_done;
868 }
869 bp += advance;
870
871 if (bp + 1 >= ep) {
872 (void)printf("...)");
873 goto bs_done;
874 }
875 (void)printf(",holdtime=");
876 relts_print(EXTRACT_16BITS(bp));
877 if (bp + 2 >= ep) {
878 (void)printf("...)");
879 goto bs_done;
880 }
881 (void)printf(",prio=%d", bp[2]);
882 bp += 4;
883 }
884 (void)printf(")");
885 }
886 bs_done:
887 break;
888 }
889 case 5:
890 (void)printf(" Assert");
891 bp += 4; len -= 4;
892 if (bp >= ep)
893 break;
894 (void)printf(" group=");
895 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
896 (void)printf("...");
897 break;
898 }
899 bp += advance; len -= advance;
900 if (bp >= ep)
901 break;
902 (void)printf(" src=");
903 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
904 (void)printf("...");
905 break;
906 }
907 bp += advance; len -= advance;
908 if (bp + 8 > ep)
909 break;
910 if (bp[0] & 0x80)
911 (void)printf(" RPT");
912 (void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
913 (void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
914 break;
915
916 case 8:
917 {
918 int i, pfxcnt;
919
920 (void)printf(" Candidate-RP-Advertisement");
921 bp += 4;
922
923 /* Prefix-Cnt, Priority, and Holdtime */
924 if (bp >= ep) break;
925 (void)printf(" prefix-cnt=%d", bp[0]);
926 pfxcnt = bp[0];
927 if (bp + 1 >= ep) break;
928 (void)printf(" prio=%d", bp[1]);
929 if (bp + 3 >= ep) break;
930 (void)printf(" holdtime=");
931 relts_print(EXTRACT_16BITS(&bp[2]));
932 bp += 4;
933
934 /* Encoded-Unicast-RP-Address */
935 if (bp >= ep) break;
936 (void)printf(" RP=");
937 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
938 (void)printf("...");
939 break;
940 }
941 bp += advance;
942
943 /* Encoded-Group Addresses */
944 for (i = 0; i < pfxcnt && bp < ep; i++) {
945 (void)printf(" Group%d=", i);
946 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
947 < 0) {
948 (void)printf("...");
949 break;
950 }
951 bp += advance;
952 }
953 break;
954 }
955
956 case 9:
957 (void)printf(" Prune-Refresh");
958 (void)printf(" src=");
959 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
960 (void)printf("...");
961 break;
962 }
963 bp += advance;
964 (void)printf(" grp=");
965 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
966 (void)printf("...");
967 break;
968 }
969 bp += advance;
970 (void)printf(" forwarder=");
971 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
972 (void)printf("...");
973 break;
974 }
975 bp += advance;
976 TCHECK2(bp[0], 2);
977 (void)printf(" TUNR ");
978 relts_print(EXTRACT_16BITS(bp));
979 break;
980
981
982 default:
983 (void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
984 break;
985 }
986
987 return;
988
989 trunc:
990 (void)printf("[|pim]");
991 }
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