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[dragonfly.git] / contrib / tcpdump / print-pim.c
blobe0cca125f675f95fce9145a4882b7fe426bc9c50
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 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 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 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
122 pimv1_join_prune_print(register const u_char *bp, register u_int len)
123 {
124 int maddrlen, addrlen, 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 maddrlen = bp[1];
166 addrlen = bp[2];
167 ngroups = bp[3];
168 bp += 4;
169 len -= 4;
170 while (ngroups--) {
171 /*
172 * XXX - does the address have length "addrlen" and the
173 * mask length "maddrlen"?
174 */
175 TCHECK2(bp[0], sizeof(struct in_addr));
176 (void)printf("\n\tGroup: %s", ipaddr_string(bp));
177 TCHECK2(bp[4], sizeof(struct in_addr));
178 if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
179 (void)printf("/%s", ipaddr_string(&bp[4]));
180 TCHECK2(bp[8], 4);
181 njoin = EXTRACT_16BITS(&bp[8]);
182 nprune = EXTRACT_16BITS(&bp[10]);
183 (void)printf(" joined: %d pruned: %d", njoin, nprune);
184 bp += 12;
185 len -= 12;
186 for (njp = 0; njp < (njoin + nprune); njp++) {
187 const char *type;
188
189 if (njp < njoin)
190 type = "Join ";
191 else
192 type = "Prune";
193 TCHECK2(bp[0], 6);
194 (void)printf("\n\t%s %s%s%s%s/%d", type,
195 (bp[0] & 0x01) ? "Sparse " : "Dense ",
196 (bp[1] & 0x80) ? "WC " : "",
197 (bp[1] & 0x40) ? "RP " : "SPT ",
198 ipaddr_string(&bp[2]), bp[1] & 0x3f);
199 bp += 6;
200 len -= 6;
201 }
202 }
203 return;
204 trunc:
205 (void)printf("[|pim]");
206 return;
207 }
208
209 void
210 pimv1_print(register const u_char *bp, register u_int len)
211 {
212 register const u_char *ep;
213 register u_char type;
214
215 ep = (const u_char *)snapend;
216 if (bp >= ep)
217 return;
218
219 TCHECK(bp[1]);
220 type = bp[1];
221
222 switch (type) {
223 case 0:
224 (void)printf(" Query");
225 if (TTEST(bp[8])) {
226 switch (bp[8] >> 4) {
227 case 0:
228 (void)printf(" Dense-mode");
229 break;
230 case 1:
231 (void)printf(" Sparse-mode");
232 break;
233 case 2:
234 (void)printf(" Sparse-Dense-mode");
235 break;
236 default:
237 (void)printf(" mode-%d", bp[8] >> 4);
238 break;
239 }
240 }
241 if (vflag) {
242 TCHECK2(bp[10],2);
243 (void)printf(" (Hold-time ");
244 relts_print(EXTRACT_16BITS(&bp[10]));
245 (void)printf(")");
246 }
247 break;
248
249 case 1:
250 (void)printf(" Register");
251 TCHECK2(bp[8], 20); /* ip header */
252 (void)printf(" for %s > %s", ipaddr_string(&bp[20]),
253 ipaddr_string(&bp[24]));
254 break;
255 case 2:
256 (void)printf(" Register-Stop");
257 TCHECK2(bp[12], sizeof(struct in_addr));
258 (void)printf(" for %s > %s", ipaddr_string(&bp[8]),
259 ipaddr_string(&bp[12]));
260 break;
261 case 3:
262 (void)printf(" Join/Prune");
263 if (vflag)
264 pimv1_join_prune_print(&bp[8], len - 8);
265 break;
266 case 4:
267 (void)printf(" RP-reachable");
268 if (vflag) {
269 TCHECK2(bp[22], 2);
270 (void)printf(" group %s",
271 ipaddr_string(&bp[8]));
272 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
273 (void)printf("/%s", ipaddr_string(&bp[12]));
274 (void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
275 relts_print(EXTRACT_16BITS(&bp[22]));
276 }
277 break;
278 case 5:
279 (void)printf(" Assert");
280 TCHECK2(bp[16], sizeof(struct in_addr));
281 (void)printf(" for %s > %s", ipaddr_string(&bp[16]),
282 ipaddr_string(&bp[8]));
283 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
284 (void)printf("/%s", ipaddr_string(&bp[12]));
285 TCHECK2(bp[24], 4);
286 (void)printf(" %s pref %d metric %d",
287 (bp[20] & 0x80) ? "RP-tree" : "SPT",
288 EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
289 EXTRACT_32BITS(&bp[24]));
290 break;
291 case 6:
292 (void)printf(" Graft");
293 if (vflag)
294 pimv1_join_prune_print(&bp[8], len - 8);
295 break;
296 case 7:
297 (void)printf(" Graft-ACK");
298 if (vflag)
299 pimv1_join_prune_print(&bp[8], len - 8);
300 break;
301 case 8:
302 (void)printf(" Mode");
303 break;
304 default:
305 (void)printf(" [type %d]", type);
306 break;
307 }
308 if ((bp[4] >> 4) != 1)
309 (void)printf(" [v%d]", bp[4] >> 4);
310 return;
311
312 trunc:
313 (void)printf("[|pim]");
314 return;
315 }
316
317 /*
318 * auto-RP is a cisco protocol, documented at
319 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
320 *
321 * This implements version 1+, dated Sept 9, 1998.
322 */
323 void
324 cisco_autorp_print(register const u_char *bp, register u_int len)
325 {
326 int type;
327 int numrps;
328 int hold;
329
330 TCHECK(bp[0]);
331 (void)printf(" auto-rp ");
332 type = bp[0];
333 switch (type) {
334 case 0x11:
335 (void)printf("candidate-advert");
336 break;
337 case 0x12:
338 (void)printf("mapping");
339 break;
340 default:
341 (void)printf("type-0x%02x", type);
342 break;
343 }
344
345 TCHECK(bp[1]);
346 numrps = bp[1];
347
348 TCHECK2(bp[2], 2);
349 (void)printf(" Hold ");
350 hold = EXTRACT_16BITS(&bp[2]);
351 if (hold)
352 relts_print(EXTRACT_16BITS(&bp[2]));
353 else
354 printf("FOREVER");
355
356 /* Next 4 bytes are reserved. */
357
358 bp += 8; len -= 8;
359
360 /*XXX skip unless -v? */
361
362 /*
363 * Rest of packet:
364 * numrps entries of the form:
365 * 32 bits: RP
366 * 6 bits: reserved
367 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
368 * 8 bits: # of entries for this RP
369 * each entry: 7 bits: reserved, 1 bit: negative,
370 * 8 bits: mask 32 bits: source
371 * lather, rinse, repeat.
372 */
373 while (numrps--) {
374 int nentries;
375 char s;
376
377 TCHECK2(bp[0], 4);
378 (void)printf(" RP %s", ipaddr_string(bp));
379 TCHECK(bp[4]);
380 switch (bp[4] & 0x3) {
381 case 0: printf(" PIMv?");
382 break;
383 case 1: printf(" PIMv1");
384 break;
385 case 2: printf(" PIMv2");
386 break;
387 case 3: printf(" PIMv1+2");
388 break;
389 }
390 if (bp[4] & 0xfc)
391 (void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
392 TCHECK(bp[5]);
393 nentries = bp[5];
394 bp += 6; len -= 6;
395 s = ' ';
396 for (; nentries; nentries--) {
397 TCHECK2(bp[0], 6);
398 (void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
399 ipaddr_string(&bp[2]), bp[1]);
400 if (bp[0] & 0x02) {
401 (void)printf(" bidir");
402 }
403 if (bp[0] & 0xfc) {
404 (void)printf("[rsvd=0x%02x]", bp[0] & 0xfc);
405 }
406 s = ',';
407 bp += 6; len -= 6;
408 }
409 }
410 return;
411
412 trunc:
413 (void)printf("[|autorp]");
414 return;
415 }
416
417 void
418 pim_print(register const u_char *bp, register u_int len, u_int cksum)
419 {
420 register const u_char *ep;
421 register struct pim *pim = (struct pim *)bp;
422
423 ep = (const u_char *)snapend;
424 if (bp >= ep)
425 return;
426 #ifdef notyet /* currently we see only version and type */
427 TCHECK(pim->pim_rsv);
428 #endif
429
430 switch (PIM_VER(pim->pim_typever)) {
431 case 2:
432 if (!vflag) {
433 printf("PIMv%u, %s, length %u",
434 PIM_VER(pim->pim_typever),
435 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
436 len);
437 return;
438 } else {
439 printf("PIMv%u, length %u\n\t%s",
440 PIM_VER(pim->pim_typever),
441 len,
442 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)));
443 pimv2_print(bp, len, cksum);
444 }
445 break;
446 default:
447 printf("PIMv%u, length %u",
448 PIM_VER(pim->pim_typever),
449 len);
450 break;
451 }
452 return;
453 }
454
455 /*
456 * PIMv2 uses encoded address representations.
457 *
458 * The last PIM-SM I-D before RFC2117 was published specified the
459 * following representation for unicast addresses. However, RFC2117
460 * specified no encoding for unicast addresses with the unicast
461 * address length specified in the header. Therefore, we have to
462 * guess which encoding is being used (Cisco's PIMv2 implementation
463 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
464 * field into a 'unicast-address-length-in-bytes' field. We guess
465 * that it's the draft encoding if this reserved field is zero.
466 *
467 * RFC2362 goes back to the encoded format, and calls the addr length
468 * field "reserved" again.
469 *
470 * The first byte is the address family, from:
471 *
472 * 0 Reserved
473 * 1 IP (IP version 4)
474 * 2 IP6 (IP version 6)
475 * 3 NSAP
476 * 4 HDLC (8-bit multidrop)
477 * 5 BBN 1822
478 * 6 802 (includes all 802 media plus Ethernet "canonical format")
479 * 7 E.163
480 * 8 E.164 (SMDS, Frame Relay, ATM)
481 * 9 F.69 (Telex)
482 * 10 X.121 (X.25, Frame Relay)
483 * 11 IPX
484 * 12 Appletalk
485 * 13 Decnet IV
486 * 14 Banyan Vines
487 * 15 E.164 with NSAP format subaddress
488 *
489 * In addition, the second byte is an "Encoding". 0 is the default
490 * encoding for the address family, and no other encodings are currently
491 * specified.
492 *
493 */
494
495 static int pimv2_addr_len;
496
497 enum pimv2_addrtype {
498 pimv2_unicast, pimv2_group, pimv2_source
499 };
500
501 /* 0 1 2 3
502 * 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
503 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
504 * | Addr Family | Encoding Type | Unicast Address |
505 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
506 * 0 1 2 3
507 * 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
508 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
509 * | Addr Family | Encoding Type | Reserved | Mask Len |
510 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
511 * | Group multicast Address |
512 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
513 * 0 1 2 3
514 * 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
515 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
516 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
517 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
518 * | Source Address |
519 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
520 */
521 static int
522 pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
523 {
524 int af;
525 int len, hdrlen;
526
527 TCHECK(bp[0]);
528
529 if (pimv2_addr_len == 0) {
530 TCHECK(bp[1]);
531 switch (bp[0]) {
532 case 1:
533 af = AF_INET;
534 len = sizeof(struct in_addr);
535 break;
536 #ifdef INET6
537 case 2:
538 af = AF_INET6;
539 len = sizeof(struct in6_addr);
540 break;
541 #endif
542 default:
543 return -1;
544 }
545 if (bp[1] != 0)
546 return -1;
547 hdrlen = 2;
548 } else {
549 switch (pimv2_addr_len) {
550 case sizeof(struct in_addr):
551 af = AF_INET;
552 break;
553 #ifdef INET6
554 case sizeof(struct in6_addr):
555 af = AF_INET6;
556 break;
557 #endif
558 default:
559 return -1;
560 break;
561 }
562 len = pimv2_addr_len;
563 hdrlen = 0;
564 }
565
566 bp += hdrlen;
567 switch (at) {
568 case pimv2_unicast:
569 TCHECK2(bp[0], len);
570 if (af == AF_INET) {
571 if (!silent)
572 (void)printf("%s", ipaddr_string(bp));
573 }
574 #ifdef INET6
575 else if (af == AF_INET6) {
576 if (!silent)
577 (void)printf("%s", ip6addr_string(bp));
578 }
579 #endif
580 return hdrlen + len;
581 case pimv2_group:
582 case pimv2_source:
583 TCHECK2(bp[0], len + 2);
584 if (af == AF_INET) {
585 if (!silent) {
586 (void)printf("%s", ipaddr_string(bp + 2));
587 if (bp[1] != 32)
588 (void)printf("/%u", bp[1]);
589 }
590 }
591 #ifdef INET6
592 else if (af == AF_INET6) {
593 if (!silent) {
594 (void)printf("%s", ip6addr_string(bp + 2));
595 if (bp[1] != 128)
596 (void)printf("/%u", bp[1]);
597 }
598 }
599 #endif
600 if (bp[0] && !silent) {
601 if (at == pimv2_group) {
602 (void)printf("(0x%02x)", bp[0]);
603 } else {
604 (void)printf("(%s%s%s",
605 bp[0] & 0x04 ? "S" : "",
606 bp[0] & 0x02 ? "W" : "",
607 bp[0] & 0x01 ? "R" : "");
608 if (bp[0] & 0xf8) {
609 (void) printf("+0x%02x", bp[0] & 0xf8);
610 }
611 (void)printf(")");
612 }
613 }
614 return hdrlen + 2 + len;
615 default:
616 return -1;
617 }
618 trunc:
619 return -1;
620 }
621
622 static void
623 pimv2_print(register const u_char *bp, register u_int len, u_int cksum)
624 {
625 register const u_char *ep;
626 register struct pim *pim = (struct pim *)bp;
627 int advance;
628
629 ep = (const u_char *)snapend;
630 if (bp >= ep)
631 return;
632 if (ep > bp + len)
633 ep = bp + len;
634 TCHECK(pim->pim_rsv);
635 pimv2_addr_len = pim->pim_rsv;
636 if (pimv2_addr_len != 0)
637 (void)printf(", RFC2117-encoding");
638
639 printf(", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum));
640 if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
641 printf("(unverified)");
642 } else {
643 printf("(%scorrect)", TTEST2(bp[0], len) && cksum ? "in" : "" );
644 }
645
646 switch (PIM_TYPE(pim->pim_typever)) {
647 case PIMV2_TYPE_HELLO:
648 {
649 u_int16_t otype, olen;
650 bp += 4;
651 while (bp < ep) {
652 TCHECK2(bp[0], 4);
653 otype = EXTRACT_16BITS(&bp[0]);
654 olen = EXTRACT_16BITS(&bp[2]);
655 TCHECK2(bp[0], 4 + olen);
656
657 printf("\n\t %s Option (%u), length %u, Value: ",
658 tok2str( pimv2_hello_option_values,"Unknown",otype),
659 otype,
660 olen);
661 bp += 4;
662
663 switch (otype) {
664 case PIMV2_HELLO_OPTION_HOLDTIME:
665 relts_print(EXTRACT_16BITS(bp));
666 break;
667
668 case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
669 if (olen != 4) {
670 (void)printf("ERROR: Option Length != 4 Bytes (%u)", olen);
671 } else {
672 char t_bit;
673 u_int16_t lan_delay, override_interval;
674 lan_delay = EXTRACT_16BITS(bp);
675 override_interval = EXTRACT_16BITS(bp+2);
676 t_bit = (lan_delay & 0x8000)? 1 : 0;
677 lan_delay &= ~0x8000;
678 (void)printf("\n\t T-bit=%d, LAN delay %dms, Override interval %dms",
679 t_bit, lan_delay, override_interval);
680 }
681 break;
682
683 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
684 case PIMV2_HELLO_OPTION_DR_PRIORITY:
685 switch (olen) {
686 case 0:
687 printf("Bi-Directional Capability (Old)");
688 break;
689 case 4:
690 printf("%u", EXTRACT_32BITS(bp));
691 break;
692 default:
693 printf("ERROR: Option Length != 4 Bytes (%u)", olen);
694 break;
695 }
696 break;
697
698 case PIMV2_HELLO_OPTION_GENID:
699 (void)printf("0x%08x", EXTRACT_32BITS(bp));
700 break;
701
702 case PIMV2_HELLO_OPTION_REFRESH_CAP:
703 (void)printf("v%d", *bp);
704 if (*(bp+1) != 0) {
705 (void)printf(", interval ");
706 relts_print(*(bp+1));
707 }
708 if (EXTRACT_16BITS(bp+2) != 0) {
709 (void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
710 }
711 break;
712
713 case PIMV2_HELLO_OPTION_BIDIR_CAP:
714 break;
715
716 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
717 case PIMV2_HELLO_OPTION_ADDRESS_LIST:
718 if (vflag > 1) {
719 const u_char *ptr = bp;
720 while (ptr < (bp+olen)) {
721 int advance;
722
723 printf("\n\t ");
724 advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
725 if (advance < 0) {
726 printf("...");
727 break;
728 }
729 ptr += advance;
730 }
731 }
732 break;
733 default:
734 if (vflag <= 1)
735 print_unknown_data(bp,"\n\t ",olen);
736 break;
737 }
738 /* do we want to see an additionally hexdump ? */
739 if (vflag> 1)
740 print_unknown_data(bp,"\n\t ",olen);
741 bp += olen;
742 }
743 break;
744 }
745
746 case PIMV2_TYPE_REGISTER:
747 {
748 struct ip *ip;
749
750 if (!TTEST2(*(bp+4), PIMV2_REGISTER_FLAG_LEN))
751 goto trunc;
752
753 printf(", Flags [ %s ]\n\t",
754 tok2str(pimv2_register_flag_values,
755 "none",
756 EXTRACT_32BITS(bp+4)));
757
758 bp += 8; len -= 8;
759 /* encapsulated multicast packet */
760 ip = (struct ip *)bp;
761 switch (IP_V(ip)) {
762 case 0: /* Null header */
763 (void)printf("IP-Null-header %s > %s",
764 ipaddr_string(&ip->ip_src),
765 ipaddr_string(&ip->ip_dst));
766 break;
767
768 case 4: /* IPv4 */
769 ip_print(gndo, bp, len);
770 break;
771 #ifdef INET6
772 case 6: /* IPv6 */
773 ip6_print(gndo, bp, len);
774 break;
775 #endif
776 default:
777 (void)printf("IP ver %d", IP_V(ip));
778 break;
779 }
780 break;
781 }
782
783 case PIMV2_TYPE_REGISTER_STOP:
784 bp += 4; len -= 4;
785 if (bp >= ep)
786 break;
787 (void)printf(" group=");
788 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
789 (void)printf("...");
790 break;
791 }
792 bp += advance; len -= advance;
793 if (bp >= ep)
794 break;
795 (void)printf(" source=");
796 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
797 (void)printf("...");
798 break;
799 }
800 bp += advance; len -= advance;
801 break;
802
803 case PIMV2_TYPE_JOIN_PRUNE:
804 case PIMV2_TYPE_GRAFT:
805 case PIMV2_TYPE_GRAFT_ACK:
806
807
808 /*
809 * 0 1 2 3
810 * 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
811 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
812 * |PIM Ver| Type | Addr length | Checksum |
813 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
814 * | Unicast-Upstream Neighbor Address |
815 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
816 * | Reserved | Num groups | Holdtime |
817 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
818 * | Encoded-Multicast Group Address-1 |
819 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
820 * | Number of Joined Sources | Number of Pruned Sources |
821 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
822 * | Encoded-Joined Source Address-1 |
823 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
824 * | . |
825 * | . |
826 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
827 * | Encoded-Joined Source Address-n |
828 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
829 * | Encoded-Pruned Source Address-1 |
830 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
831 * | . |
832 * | . |
833 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
834 * | Encoded-Pruned Source Address-n |
835 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
836 * | . |
837 * | . |
838 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
839 * | Encoded-Multicast Group Address-n |
840 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
841 */
842
843 {
844 u_int8_t ngroup;
845 u_int16_t holdtime;
846 u_int16_t njoin;
847 u_int16_t nprune;
848 int i, j;
849
850 bp += 4; len -= 4;
851 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
852 if (bp >= ep)
853 break;
854 (void)printf(", upstream-neighbor: ");
855 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
856 (void)printf("...");
857 break;
858 }
859 bp += advance; len -= advance;
860 }
861 if (bp + 4 > ep)
862 break;
863 ngroup = bp[1];
864 holdtime = EXTRACT_16BITS(&bp[2]);
865 (void)printf("\n\t %u group(s)", ngroup);
866 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
867 (void)printf(", holdtime: ");
868 if (holdtime == 0xffff)
869 (void)printf("infinite");
870 else
871 relts_print(holdtime);
872 }
873 bp += 4; len -= 4;
874 for (i = 0; i < ngroup; i++) {
875 if (bp >= ep)
876 goto jp_done;
877 (void)printf("\n\t group #%u: ", i+1);
878 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
879 (void)printf("...)");
880 goto jp_done;
881 }
882 bp += advance; len -= advance;
883 if (bp + 4 > ep) {
884 (void)printf("...)");
885 goto jp_done;
886 }
887 njoin = EXTRACT_16BITS(&bp[0]);
888 nprune = EXTRACT_16BITS(&bp[2]);
889 (void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
890 bp += 4; len -= 4;
891 for (j = 0; j < njoin; j++) {
892 (void)printf("\n\t joined source #%u: ",j+1);
893 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
894 (void)printf("...)");
895 goto jp_done;
896 }
897 bp += advance; len -= advance;
898 }
899 for (j = 0; j < nprune; j++) {
900 (void)printf("\n\t pruned source #%u: ",j+1);
901 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
902 (void)printf("...)");
903 goto jp_done;
904 }
905 bp += advance; len -= advance;
906 }
907 }
908 jp_done:
909 break;
910 }
911
912 case PIMV2_TYPE_BOOTSTRAP:
913 {
914 int i, j, frpcnt;
915 bp += 4;
916
917 /* Fragment Tag, Hash Mask len, and BSR-priority */
918 if (bp + sizeof(u_int16_t) >= ep) break;
919 (void)printf(" tag=%x", EXTRACT_16BITS(bp));
920 bp += sizeof(u_int16_t);
921 if (bp >= ep) break;
922 (void)printf(" hashmlen=%d", bp[0]);
923 if (bp + 1 >= ep) break;
924 (void)printf(" BSRprio=%d", bp[1]);
925 bp += 2;
926
927 /* Encoded-Unicast-BSR-Address */
928 if (bp >= ep) break;
929 (void)printf(" BSR=");
930 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
931 (void)printf("...");
932 break;
933 }
934 bp += advance;
935
936 for (i = 0; bp < ep; i++) {
937 /* Encoded-Group Address */
938 (void)printf(" (group%d: ", i);
939 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
940 < 0) {
941 (void)printf("...)");
942 goto bs_done;
943 }
944 bp += advance;
945
946 /* RP-Count, Frag RP-Cnt, and rsvd */
947 if (bp >= ep) {
948 (void)printf("...)");
949 goto bs_done;
950 }
951 (void)printf(" RPcnt=%d", bp[0]);
952 if (bp + 1 >= ep) {
953 (void)printf("...)");
954 goto bs_done;
955 }
956 (void)printf(" FRPcnt=%d", frpcnt = bp[1]);
957 bp += 4;
958
959 for (j = 0; j < frpcnt && bp < ep; j++) {
960 /* each RP info */
961 (void)printf(" RP%d=", j);
962 if ((advance = pimv2_addr_print(bp,
963 pimv2_unicast,
964 0)) < 0) {
965 (void)printf("...)");
966 goto bs_done;
967 }
968 bp += advance;
969
970 if (bp + 1 >= ep) {
971 (void)printf("...)");
972 goto bs_done;
973 }
974 (void)printf(",holdtime=");
975 relts_print(EXTRACT_16BITS(bp));
976 if (bp + 2 >= ep) {
977 (void)printf("...)");
978 goto bs_done;
979 }
980 (void)printf(",prio=%d", bp[2]);
981 bp += 4;
982 }
983 (void)printf(")");
984 }
985 bs_done:
986 break;
987 }
988 case PIMV2_TYPE_ASSERT:
989 bp += 4; len -= 4;
990 if (bp >= ep)
991 break;
992 (void)printf(" group=");
993 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
994 (void)printf("...");
995 break;
996 }
997 bp += advance; len -= advance;
998 if (bp >= ep)
999 break;
1000 (void)printf(" src=");
1001 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1002 (void)printf("...");
1003 break;
1004 }
1005 bp += advance; len -= advance;
1006 if (bp + 8 > ep)
1007 break;
1008 if (bp[0] & 0x80)
1009 (void)printf(" RPT");
1010 (void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
1011 (void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
1012 break;
1013
1014 case PIMV2_TYPE_CANDIDATE_RP:
1015 {
1016 int i, pfxcnt;
1017 bp += 4;
1018
1019 /* Prefix-Cnt, Priority, and Holdtime */
1020 if (bp >= ep) break;
1021 (void)printf(" prefix-cnt=%d", bp[0]);
1022 pfxcnt = bp[0];
1023 if (bp + 1 >= ep) break;
1024 (void)printf(" prio=%d", bp[1]);
1025 if (bp + 3 >= ep) break;
1026 (void)printf(" holdtime=");
1027 relts_print(EXTRACT_16BITS(&bp[2]));
1028 bp += 4;
1029
1030 /* Encoded-Unicast-RP-Address */
1031 if (bp >= ep) break;
1032 (void)printf(" RP=");
1033 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1034 (void)printf("...");
1035 break;
1036 }
1037 bp += advance;
1038
1039 /* Encoded-Group Addresses */
1040 for (i = 0; i < pfxcnt && bp < ep; i++) {
1041 (void)printf(" Group%d=", i);
1042 if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
1043 < 0) {
1044 (void)printf("...");
1045 break;
1046 }
1047 bp += advance;
1048 }
1049 break;
1050 }
1051
1052 case PIMV2_TYPE_PRUNE_REFRESH:
1053 (void)printf(" src=");
1054 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1055 (void)printf("...");
1056 break;
1057 }
1058 bp += advance;
1059 (void)printf(" grp=");
1060 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
1061 (void)printf("...");
1062 break;
1063 }
1064 bp += advance;
1065 (void)printf(" forwarder=");
1066 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1067 (void)printf("...");
1068 break;
1069 }
1070 bp += advance;
1071 TCHECK2(bp[0], 2);
1072 (void)printf(" TUNR ");
1073 relts_print(EXTRACT_16BITS(bp));
1074 break;
1075
1076
1077 default:
1078 (void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
1079 break;
1080 }
1081
1082 return;
1083
1084 trunc:
1085 (void)printf("[|pim]");
1086 }
1087
1088 /*
1089 * Local Variables:
1090 * c-style: whitesmith
1091 * c-basic-offset: 8
1092 * End:
1093 */
DragonFly BSD