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Add the ndo_protocol field in the netdissect_options structure
[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 /* \summary: Protocol Independent Multicast (PIM) printer */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include "netdissect-stdinc.h"
29
30 #include "netdissect.h"
31 #include "addrtoname.h"
32 #include "extract.h"
33
34 #include "ip.h"
35 #include "ip6.h"
36 #include "ipproto.h"
37
38 #define PIMV1_TYPE_QUERY 0
39 #define PIMV1_TYPE_REGISTER 1
40 #define PIMV1_TYPE_REGISTER_STOP 2
41 #define PIMV1_TYPE_JOIN_PRUNE 3
42 #define PIMV1_TYPE_RP_REACHABILITY 4
43 #define PIMV1_TYPE_ASSERT 5
44 #define PIMV1_TYPE_GRAFT 6
45 #define PIMV1_TYPE_GRAFT_ACK 7
46
47 static const struct tok pimv1_type_str[] = {
48 { PIMV1_TYPE_QUERY, "Query" },
49 { PIMV1_TYPE_REGISTER, "Register" },
50 { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" },
51 { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" },
52 { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" },
53 { PIMV1_TYPE_ASSERT, "Assert" },
54 { PIMV1_TYPE_GRAFT, "Graft" },
55 { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" },
56 { 0, NULL }
57 };
58
59 #define PIMV2_TYPE_HELLO 0
60 #define PIMV2_TYPE_REGISTER 1
61 #define PIMV2_TYPE_REGISTER_STOP 2
62 #define PIMV2_TYPE_JOIN_PRUNE 3
63 #define PIMV2_TYPE_BOOTSTRAP 4
64 #define PIMV2_TYPE_ASSERT 5
65 #define PIMV2_TYPE_GRAFT 6
66 #define PIMV2_TYPE_GRAFT_ACK 7
67 #define PIMV2_TYPE_CANDIDATE_RP 8
68 #define PIMV2_TYPE_PRUNE_REFRESH 9
69 #define PIMV2_TYPE_DF_ELECTION 10
70 #define PIMV2_TYPE_ECMP_REDIRECT 11
71
72 static const struct tok pimv2_type_values[] = {
73 { PIMV2_TYPE_HELLO, "Hello" },
74 { PIMV2_TYPE_REGISTER, "Register" },
75 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
76 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" },
77 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" },
78 { PIMV2_TYPE_ASSERT, "Assert" },
79 { PIMV2_TYPE_GRAFT, "Graft" },
80 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" },
81 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" },
82 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
83 { PIMV2_TYPE_DF_ELECTION, "DF Election" },
84 { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" },
85 { 0, NULL}
86 };
87
88 #define PIMV2_HELLO_OPTION_HOLDTIME 1
89 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2
90 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18
91 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19
92 #define PIMV2_HELLO_OPTION_GENID 20
93 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21
94 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22
95 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24
96 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
97
98 static const struct tok pimv2_hello_option_values[] = {
99 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" },
100 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" },
101 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" },
102 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" },
103 { PIMV2_HELLO_OPTION_GENID, "Generation ID" },
104 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" },
105 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" },
106 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" },
107 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
108 { 0, NULL}
109 };
110
111 #define PIMV2_REGISTER_FLAG_LEN 4
112 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000
113 #define PIMV2_REGISTER_FLAG_NULL 0x40000000
114
115 static const struct tok pimv2_register_flag_values[] = {
116 { PIMV2_REGISTER_FLAG_BORDER, "Border" },
117 { PIMV2_REGISTER_FLAG_NULL, "Null" },
118 { 0, NULL}
119 };
120
121 /*
122 * XXX: We consider a case where IPv6 is not ready yet for portability,
123 * but PIM dependent defintions should be independent of IPv6...
124 */
125
126 struct pim {
127 nd_uint8_t pim_typever;
128 /* upper 4bit: PIM version number; 2 for PIMv2 */
129 /* lower 4bit: the PIM message type, currently they are:
130 * Hello, Register, Register-Stop, Join/Prune,
131 * Bootstrap, Assert, Graft (PIM-DM only),
132 * Graft-Ack (PIM-DM only), C-RP-Adv
133 */
134 #define PIM_VER(x) (((x) & 0xf0) >> 4)
135 #define PIM_TYPE(x) ((x) & 0x0f)
136 nd_uint8_t pim_rsv; /* Reserved in v1, address length in v2 */
137 nd_uint16_t pim_cksum; /* IP style check sum */
138 };
139
140 static void pimv2_print(netdissect_options *, const u_char *bp, u_int len, const u_char *);
141
142 static void
143 pimv1_join_prune_print(netdissect_options *ndo,
144 const u_char *bp, u_int len)
145 {
146 u_int ngroups, njoin, nprune;
147 u_int njp;
148
149 /* If it's a single group and a single source, use 1-line output. */
150 if (ND_TTEST_LEN(bp, 30) && EXTRACT_U_1(bp + 11) == 1 &&
151 ((njoin = EXTRACT_BE_U_2(bp + 20)) + EXTRACT_BE_U_2(bp + 22)) == 1) {
152 u_int hold;
153
154 ND_PRINT(" RPF %s ", ipaddr_string(ndo, bp));
155 hold = EXTRACT_BE_U_2(bp + 6);
156 if (hold != 180) {
157 ND_PRINT("Hold ");
158 unsigned_relts_print(ndo, hold);
159 }
160 ND_PRINT("%s (%s/%u, %s", njoin ? "Join" : "Prune",
161 ipaddr_string(ndo, bp + 26), EXTRACT_U_1(bp + 25) & 0x3f,
162 ipaddr_string(ndo, bp + 12));
163 if (EXTRACT_BE_U_4(bp + 16) != 0xffffffff)
164 ND_PRINT("/%s", ipaddr_string(ndo, bp + 16));
165 ND_PRINT(") %s%s %s",
166 (EXTRACT_U_1(bp + 24) & 0x01) ? "Sparse" : "Dense",
167 (EXTRACT_U_1(bp + 25) & 0x80) ? " WC" : "",
168 (EXTRACT_U_1(bp + 25) & 0x40) ? "RP" : "SPT");
169 return;
170 }
171
172 if (len < sizeof(nd_ipv4))
173 goto trunc;
174 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
175 if (ndo->ndo_vflag > 1)
176 ND_PRINT("\n");
177 ND_PRINT(" Upstream Nbr: %s", ipaddr_string(ndo, bp));
178 bp += 4;
179 len -= 4;
180 if (len < 4)
181 goto trunc;
182 ND_TCHECK_2(bp + 2);
183 if (ndo->ndo_vflag > 1)
184 ND_PRINT("\n");
185 ND_PRINT(" Hold time: ");
186 unsigned_relts_print(ndo, EXTRACT_BE_U_2(bp + 2));
187 if (ndo->ndo_vflag < 2)
188 return;
189 bp += 4;
190 len -= 4;
191
192 if (len < 4)
193 goto trunc;
194 ND_TCHECK_4(bp);
195 ngroups = EXTRACT_U_1(bp + 3);
196 bp += 4;
197 len -= 4;
198 while (ngroups != 0) {
199 /*
200 * XXX - does the address have length "addrlen" and the
201 * mask length "maddrlen"?
202 */
203 if (len < 4)
204 goto trunc;
205 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
206 ND_PRINT("\n\tGroup: %s", ipaddr_string(ndo, bp));
207 bp += 4;
208 len -= 4;
209 if (len < 4)
210 goto trunc;
211 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
212 if (EXTRACT_BE_U_4(bp) != 0xffffffff)
213 ND_PRINT("/%s", ipaddr_string(ndo, bp));
214 bp += 4;
215 len -= 4;
216 if (len < 4)
217 goto trunc;
218 ND_TCHECK_4(bp);
219 njoin = EXTRACT_BE_U_2(bp);
220 nprune = EXTRACT_BE_U_2(bp + 2);
221 ND_PRINT(" joined: %u pruned: %u", njoin, nprune);
222 bp += 4;
223 len -= 4;
224 for (njp = 0; njp < (njoin + nprune); njp++) {
225 const char *type;
226
227 if (njp < njoin)
228 type = "Join ";
229 else
230 type = "Prune";
231 if (len < 6)
232 goto trunc;
233 ND_TCHECK_6(bp);
234 ND_PRINT("\n\t%s %s%s%s%s/%u", type,
235 (EXTRACT_U_1(bp) & 0x01) ? "Sparse " : "Dense ",
236 (EXTRACT_U_1(bp + 1) & 0x80) ? "WC " : "",
237 (EXTRACT_U_1(bp + 1) & 0x40) ? "RP " : "SPT ",
238 ipaddr_string(ndo, bp + 2),
239 EXTRACT_U_1(bp + 1) & 0x3f);
240 bp += 6;
241 len -= 6;
242 }
243 ngroups--;
244 }
245 return;
246 trunc:
247 ND_PRINT("[|pim]");
248 return;
249 }
250
251 void
252 pimv1_print(netdissect_options *ndo,
253 const u_char *bp, u_int len)
254 {
255 u_char type;
256
257 ndo->ndo_protocol = "pimv1";
258 ND_TCHECK_1(bp + 1);
259 type = EXTRACT_U_1(bp + 1);
260
261 ND_PRINT(" %s", tok2str(pimv1_type_str, "[type %u]", type));
262 switch (type) {
263 case PIMV1_TYPE_QUERY:
264 if (ND_TTEST_1(bp + 8)) {
265 switch (EXTRACT_U_1(bp + 8) >> 4) {
266 case 0:
267 ND_PRINT(" Dense-mode");
268 break;
269 case 1:
270 ND_PRINT(" Sparse-mode");
271 break;
272 case 2:
273 ND_PRINT(" Sparse-Dense-mode");
274 break;
275 default:
276 ND_PRINT(" mode-%u", EXTRACT_U_1(bp + 8) >> 4);
277 break;
278 }
279 }
280 if (ndo->ndo_vflag) {
281 ND_TCHECK_2(bp + 10);
282 ND_PRINT(" (Hold-time ");
283 unsigned_relts_print(ndo, EXTRACT_BE_U_2(bp + 10));
284 ND_PRINT(")");
285 }
286 break;
287
288 case PIMV1_TYPE_REGISTER:
289 ND_TCHECK_LEN(bp + 8, 20); /* ip header */
290 ND_PRINT(" for %s > %s", ipaddr_string(ndo, bp + 20),
291 ipaddr_string(ndo, bp + 24));
292 break;
293 case PIMV1_TYPE_REGISTER_STOP:
294 ND_TCHECK_LEN(bp + 12, sizeof(nd_ipv4));
295 ND_PRINT(" for %s > %s", ipaddr_string(ndo, bp + 8),
296 ipaddr_string(ndo, bp + 12));
297 break;
298 case PIMV1_TYPE_RP_REACHABILITY:
299 if (ndo->ndo_vflag) {
300 ND_TCHECK_2(bp + 22);
301 ND_PRINT(" group %s", ipaddr_string(ndo, bp + 8));
302 if (EXTRACT_BE_U_4(bp + 12) != 0xffffffff)
303 ND_PRINT("/%s", ipaddr_string(ndo, bp + 12));
304 ND_PRINT(" RP %s hold ", ipaddr_string(ndo, bp + 16));
305 unsigned_relts_print(ndo, EXTRACT_BE_U_2(bp + 22));
306 }
307 break;
308 case PIMV1_TYPE_ASSERT:
309 ND_TCHECK_LEN(bp + 16, sizeof(nd_ipv4));
310 ND_PRINT(" for %s > %s", ipaddr_string(ndo, bp + 16),
311 ipaddr_string(ndo, bp + 8));
312 if (EXTRACT_BE_U_4(bp + 12) != 0xffffffff)
313 ND_PRINT("/%s", ipaddr_string(ndo, bp + 12));
314 ND_TCHECK_4(bp + 24);
315 ND_PRINT(" %s pref %u metric %u",
316 (EXTRACT_U_1(bp + 20) & 0x80) ? "RP-tree" : "SPT",
317 EXTRACT_BE_U_4(bp + 20) & 0x7fffffff,
318 EXTRACT_BE_U_4(bp + 24));
319 break;
320 case PIMV1_TYPE_JOIN_PRUNE:
321 case PIMV1_TYPE_GRAFT:
322 case PIMV1_TYPE_GRAFT_ACK:
323 if (ndo->ndo_vflag) {
324 if (len < 8)
325 goto trunc;
326 pimv1_join_prune_print(ndo, bp + 8, len - 8);
327 }
328 break;
329 }
330 ND_TCHECK_1(bp + 4);
331 if ((EXTRACT_U_1(bp + 4) >> 4) != 1)
332 ND_PRINT(" [v%u]", EXTRACT_U_1(bp + 4) >> 4);
333 return;
334
335 trunc:
336 ND_PRINT("[|pim]");
337 return;
338 }
339
340 /*
341 * auto-RP is a cisco protocol, documented at
342 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
343 *
344 * This implements version 1+, dated Sept 9, 1998.
345 */
346 void
347 cisco_autorp_print(netdissect_options *ndo,
348 const u_char *bp, u_int len)
349 {
350 u_int type;
351 u_int numrps;
352 u_int hold;
353
354 ndo->ndo_protocol = "cisco_autorp";
355 if (len < 8)
356 goto trunc;
357 ND_TCHECK_1(bp);
358 ND_PRINT(" auto-rp ");
359 type = EXTRACT_U_1(bp);
360 switch (type) {
361 case 0x11:
362 ND_PRINT("candidate-advert");
363 break;
364 case 0x12:
365 ND_PRINT("mapping");
366 break;
367 default:
368 ND_PRINT("type-0x%02x", type);
369 break;
370 }
371
372 ND_TCHECK_1(bp + 1);
373 numrps = EXTRACT_U_1(bp + 1);
374
375 ND_TCHECK_2(bp + 2);
376 ND_PRINT(" Hold ");
377 hold = EXTRACT_BE_U_2(bp + 2);
378 if (hold)
379 unsigned_relts_print(ndo, EXTRACT_BE_U_2(bp + 2));
380 else
381 ND_PRINT("FOREVER");
382
383 /* Next 4 bytes are reserved. */
384
385 bp += 8; len -= 8;
386
387 /*XXX skip unless -v? */
388
389 /*
390 * Rest of packet:
391 * numrps entries of the form:
392 * 32 bits: RP
393 * 6 bits: reserved
394 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
395 * 8 bits: # of entries for this RP
396 * each entry: 7 bits: reserved, 1 bit: negative,
397 * 8 bits: mask 32 bits: source
398 * lather, rinse, repeat.
399 */
400 while (numrps != 0) {
401 u_int nentries;
402 char s;
403
404 if (len < 4)
405 goto trunc;
406 ND_TCHECK_4(bp);
407 ND_PRINT(" RP %s", ipaddr_string(ndo, bp));
408 bp += 4;
409 len -= 4;
410 if (len < 1)
411 goto trunc;
412 ND_TCHECK_1(bp);
413 switch (EXTRACT_U_1(bp) & 0x3) {
414 case 0: ND_PRINT(" PIMv?");
415 break;
416 case 1: ND_PRINT(" PIMv1");
417 break;
418 case 2: ND_PRINT(" PIMv2");
419 break;
420 case 3: ND_PRINT(" PIMv1+2");
421 break;
422 }
423 if (EXTRACT_U_1(bp) & 0xfc)
424 ND_PRINT(" [rsvd=0x%02x]", EXTRACT_U_1(bp) & 0xfc);
425 bp += 1;
426 len -= 1;
427 if (len < 1)
428 goto trunc;
429 ND_TCHECK_1(bp);
430 nentries = EXTRACT_U_1(bp);
431 bp += 1;
432 len -= 1;
433 s = ' ';
434 while (nentries != 0) {
435 if (len < 6)
436 goto trunc;
437 ND_TCHECK_6(bp);
438 ND_PRINT("%c%s%s/%u", s, EXTRACT_U_1(bp) & 1 ? "!" : "",
439 ipaddr_string(ndo, bp + 2), EXTRACT_U_1(bp + 1));
440 if (EXTRACT_U_1(bp) & 0x02) {
441 ND_PRINT(" bidir");
442 }
443 if (EXTRACT_U_1(bp) & 0xfc) {
444 ND_PRINT("[rsvd=0x%02x]", EXTRACT_U_1(bp) & 0xfc);
445 }
446 s = ',';
447 bp += 6; len -= 6;
448 nentries--;
449 }
450 numrps--;
451 }
452 return;
453
454 trunc:
455 ND_PRINT("[|autorp]");
456 return;
457 }
458
459 void
460 pim_print(netdissect_options *ndo,
461 const u_char *bp, u_int len, const u_char *bp2)
462 {
463 const struct pim *pim = (const struct pim *)bp;
464 uint8_t pim_typever;
465
466 ndo->ndo_protocol = "pim";
467 #ifdef notyet /* currently we see only version and type */
468 ND_TCHECK_1(pim->pim_rsv);
469 #endif
470
471 ND_TCHECK_1(pim->pim_typever);
472 pim_typever = EXTRACT_U_1(pim->pim_typever);
473 switch (PIM_VER(pim_typever)) {
474 case 2:
475 if (!ndo->ndo_vflag) {
476 ND_PRINT("PIMv%u, %s, length %u",
477 PIM_VER(pim_typever),
478 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever)),
479 len);
480 return;
481 } else {
482 ND_PRINT("PIMv%u, length %u\n\t%s",
483 PIM_VER(pim_typever),
484 len,
485 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever)));
486 pimv2_print(ndo, bp, len, bp2);
487 }
488 break;
489 default:
490 ND_PRINT("PIMv%u, length %u",
491 PIM_VER(pim_typever),
492 len);
493 break;
494 }
495 return;
496
497 trunc:
498 ND_PRINT("[|pim]");
499 return;
500 }
501
502 /*
503 * PIMv2 uses encoded address representations.
504 *
505 * The last PIM-SM I-D before RFC2117 was published specified the
506 * following representation for unicast addresses. However, RFC2117
507 * specified no encoding for unicast addresses with the unicast
508 * address length specified in the header. Therefore, we have to
509 * guess which encoding is being used (Cisco's PIMv2 implementation
510 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
511 * field into a 'unicast-address-length-in-bytes' field. We guess
512 * that it's the draft encoding if this reserved field is zero.
513 *
514 * RFC2362 goes back to the encoded format, and calls the addr length
515 * field "reserved" again.
516 *
517 * The first byte is the address family, from:
518 *
519 * 0 Reserved
520 * 1 IP (IP version 4)
521 * 2 IP6 (IP version 6)
522 * 3 NSAP
523 * 4 HDLC (8-bit multidrop)
524 * 5 BBN 1822
525 * 6 802 (includes all 802 media plus Ethernet "canonical format")
526 * 7 E.163
527 * 8 E.164 (SMDS, Frame Relay, ATM)
528 * 9 F.69 (Telex)
529 * 10 X.121 (X.25, Frame Relay)
530 * 11 IPX
531 * 12 Appletalk
532 * 13 Decnet IV
533 * 14 Banyan Vines
534 * 15 E.164 with NSAP format subaddress
535 *
536 * In addition, the second byte is an "Encoding". 0 is the default
537 * encoding for the address family, and no other encodings are currently
538 * specified.
539 *
540 */
541
542 enum pimv2_addrtype {
543 pimv2_unicast, pimv2_group, pimv2_source
544 };
545
546 /* 0 1 2 3
547 * 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
548 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
549 * | Addr Family | Encoding Type | Unicast Address |
550 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
551 * 0 1 2 3
552 * 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
553 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
554 * | Addr Family | Encoding Type | Reserved | Mask Len |
555 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
556 * | Group multicast Address |
557 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
558 * 0 1 2 3
559 * 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
560 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
561 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
562 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
563 * | Source Address |
564 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
565 */
566 static int
567 pimv2_addr_print(netdissect_options *ndo,
568 const u_char *bp, u_int len, enum pimv2_addrtype at,
569 u_int addr_len, int silent)
570 {
571 u_int af;
572 int hdrlen;
573
574 if (addr_len == 0) {
575 if (len < 2)
576 goto trunc;
577 ND_TCHECK_1(bp + 1);
578 switch (EXTRACT_U_1(bp)) {
579 case 1:
580 af = AF_INET;
581 addr_len = (u_int)sizeof(nd_ipv4);
582 break;
583 case 2:
584 af = AF_INET6;
585 addr_len = (u_int)sizeof(nd_ipv6);
586 break;
587 default:
588 return -1;
589 }
590 if (EXTRACT_U_1(bp + 1) != 0)
591 return -1;
592 hdrlen = 2;
593 } else {
594 switch (addr_len) {
595 case sizeof(nd_ipv4):
596 af = AF_INET;
597 break;
598 case sizeof(nd_ipv6):
599 af = AF_INET6;
600 break;
601 default:
602 return -1;
603 break;
604 }
605 hdrlen = 0;
606 }
607
608 bp += hdrlen;
609 len -= hdrlen;
610 switch (at) {
611 case pimv2_unicast:
612 if (len < addr_len)
613 goto trunc;
614 ND_TCHECK_LEN(bp, addr_len);
615 if (af == AF_INET) {
616 if (!silent)
617 ND_PRINT("%s", ipaddr_string(ndo, bp));
618 }
619 else if (af == AF_INET6) {
620 if (!silent)
621 ND_PRINT("%s", ip6addr_string(ndo, bp));
622 }
623 return hdrlen + addr_len;
624 case pimv2_group:
625 case pimv2_source:
626 if (len < addr_len + 2)
627 goto trunc;
628 ND_TCHECK_LEN(bp, addr_len + 2);
629 if (af == AF_INET) {
630 if (!silent) {
631 ND_PRINT("%s", ipaddr_string(ndo, bp + 2));
632 if (EXTRACT_U_1(bp + 1) != 32)
633 ND_PRINT("/%u", EXTRACT_U_1(bp + 1));
634 }
635 }
636 else if (af == AF_INET6) {
637 if (!silent) {
638 ND_PRINT("%s", ip6addr_string(ndo, bp + 2));
639 if (EXTRACT_U_1(bp + 1) != 128)
640 ND_PRINT("/%u", EXTRACT_U_1(bp + 1));
641 }
642 }
643 if (EXTRACT_U_1(bp) && !silent) {
644 if (at == pimv2_group) {
645 ND_PRINT("(0x%02x)", EXTRACT_U_1(bp));
646 } else {
647 ND_PRINT("(%s%s%s",
648 EXTRACT_U_1(bp) & 0x04 ? "S" : "",
649 EXTRACT_U_1(bp) & 0x02 ? "W" : "",
650 EXTRACT_U_1(bp) & 0x01 ? "R" : "");
651 if (EXTRACT_U_1(bp) & 0xf8) {
652 ND_PRINT("+0x%02x", EXTRACT_U_1(bp) & 0xf8);
653 }
654 ND_PRINT(")");
655 }
656 }
657 return hdrlen + 2 + addr_len;
658 default:
659 return -1;
660 }
661 trunc:
662 return -1;
663 }
664
665 enum checksum_status {
666 CORRECT,
667 INCORRECT,
668 UNVERIFIED
669 };
670
671 static enum checksum_status
672 pimv2_check_checksum(netdissect_options *ndo, const u_char *bp,
673 const u_char *bp2, u_int len)
674 {
675 const struct ip *ip;
676 u_int cksum;
677
678 if (!ND_TTEST_LEN(bp, len)) {
679 /* We don't have all the data. */
680 return (UNVERIFIED);
681 }
682 ip = (const struct ip *)bp2;
683 if (IP_V(ip) == 4) {
684 struct cksum_vec vec[1];
685
686 vec[0].ptr = bp;
687 vec[0].len = len;
688 cksum = in_cksum(vec, 1);
689 return (cksum ? INCORRECT : CORRECT);
690 } else if (IP_V(ip) == 6) {
691 const struct ip6_hdr *ip6;
692
693 ip6 = (const struct ip6_hdr *)bp2;
694 cksum = nextproto6_cksum(ndo, ip6, bp, len, len, IPPROTO_PIM);
695 return (cksum ? INCORRECT : CORRECT);
696 } else {
697 return (UNVERIFIED);
698 }
699 }
700
701 static void
702 pimv2_print(netdissect_options *ndo,
703 const u_char *bp, u_int len, const u_char *bp2)
704 {
705 const struct pim *pim = (const struct pim *)bp;
706 int advance;
707 enum checksum_status cksum_status;
708 u_int pim_typever;
709 u_int pimv2_addr_len;
710
711 if (len < 2)
712 goto trunc;
713 ND_TCHECK_1(pim->pim_rsv);
714 pim_typever = EXTRACT_U_1(pim->pim_typever);
715 pimv2_addr_len = EXTRACT_U_1(pim->pim_rsv);
716 if (pimv2_addr_len != 0)
717 ND_PRINT(", RFC2117-encoding");
718
719 if (len < 4)
720 goto trunc;
721 ND_TCHECK_2(pim->pim_cksum);
722 ND_PRINT(", cksum 0x%04x ", EXTRACT_BE_U_2(pim->pim_cksum));
723 if (EXTRACT_BE_U_2(pim->pim_cksum) == 0) {
724 ND_PRINT("(unverified)");
725 } else {
726 if (PIM_TYPE(pim_typever) == PIMV2_TYPE_REGISTER) {
727 /*
728 * The checksum only covers the packet header,
729 * not the encapsulated packet.
730 */
731 cksum_status = pimv2_check_checksum(ndo, bp, bp2, 8);
732 if (cksum_status == INCORRECT) {
733 /*
734 * To quote RFC 4601, "For interoperability
735 * reasons, a message carrying a checksum
736 * calculated over the entire PIM Register
737 * message should also be accepted."
738 */
739 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len);
740 }
741 } else {
742 /*
743 * The checksum covers the entire packet.
744 */
745 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len);
746 }
747 switch (cksum_status) {
748
749 case CORRECT:
750 ND_PRINT("(correct)");
751 break;
752
753 case INCORRECT:
754 ND_PRINT("(incorrect)");
755 break;
756
757 case UNVERIFIED:
758 ND_PRINT("(unverified)");
759 break;
760 }
761 }
762 bp += 4;
763 len -= 4;
764
765 switch (PIM_TYPE(pim_typever)) {
766 case PIMV2_TYPE_HELLO:
767 {
768 uint16_t otype, olen;
769 while (len > 0) {
770 if (len < 4)
771 goto trunc;
772 ND_TCHECK_4(bp);
773 otype = EXTRACT_BE_U_2(bp);
774 olen = EXTRACT_BE_U_2(bp + 2);
775 ND_PRINT("\n\t %s Option (%u), length %u, Value: ",
776 tok2str(pimv2_hello_option_values, "Unknown", otype),
777 otype,
778 olen);
779 bp += 4;
780 len -= 4;
781
782 if (len < olen)
783 goto trunc;
784 ND_TCHECK_LEN(bp, olen);
785 switch (otype) {
786 case PIMV2_HELLO_OPTION_HOLDTIME:
787 if (olen != 2) {
788 ND_PRINT("ERROR: Option Length != 2 Bytes (%u)", olen);
789 } else {
790 unsigned_relts_print(ndo,
791 EXTRACT_BE_U_2(bp));
792 }
793 break;
794
795 case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
796 if (olen != 4) {
797 ND_PRINT("ERROR: Option Length != 4 Bytes (%u)", olen);
798 } else {
799 char t_bit;
800 uint16_t lan_delay, override_interval;
801 lan_delay = EXTRACT_BE_U_2(bp);
802 override_interval = EXTRACT_BE_U_2(bp + 2);
803 t_bit = (lan_delay & 0x8000)? 1 : 0;
804 lan_delay &= ~0x8000;
805 ND_PRINT("\n\t T-bit=%u, LAN delay %ums, Override interval %ums",
806 t_bit, lan_delay, override_interval);
807 }
808 break;
809
810 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
811 case PIMV2_HELLO_OPTION_DR_PRIORITY:
812 switch (olen) {
813 case 0:
814 ND_PRINT("Bi-Directional Capability (Old)");
815 break;
816 case 4:
817 ND_PRINT("%u", EXTRACT_BE_U_4(bp));
818 break;
819 default:
820 ND_PRINT("ERROR: Option Length != 4 Bytes (%u)", olen);
821 break;
822 }
823 break;
824
825 case PIMV2_HELLO_OPTION_GENID:
826 if (olen != 4) {
827 ND_PRINT("ERROR: Option Length != 4 Bytes (%u)", olen);
828 } else {
829 ND_PRINT("0x%08x", EXTRACT_BE_U_4(bp));
830 }
831 break;
832
833 case PIMV2_HELLO_OPTION_REFRESH_CAP:
834 if (olen != 4) {
835 ND_PRINT("ERROR: Option Length != 4 Bytes (%u)", olen);
836 } else {
837 ND_PRINT("v%u", EXTRACT_U_1(bp));
838 if (EXTRACT_U_1(bp + 1) != 0) {
839 ND_PRINT(", interval ");
840 unsigned_relts_print(ndo,
841 EXTRACT_U_1(bp + 1));
842 }
843 if (EXTRACT_BE_U_2(bp + 2) != 0) {
844 ND_PRINT(" ?0x%04x?", EXTRACT_BE_U_2(bp + 2));
845 }
846 }
847 break;
848
849 case PIMV2_HELLO_OPTION_BIDIR_CAP:
850 break;
851
852 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
853 case PIMV2_HELLO_OPTION_ADDRESS_LIST:
854 if (ndo->ndo_vflag > 1) {
855 const u_char *ptr = bp;
856 u_int plen = len;
857 while (ptr < (bp+olen)) {
858 ND_PRINT("\n\t ");
859 advance = pimv2_addr_print(ndo, ptr, plen, pimv2_unicast, pimv2_addr_len, 0);
860 if (advance < 0)
861 goto trunc;
862 ptr += advance;
863 plen -= advance;
864 }
865 }
866 break;
867 default:
868 if (ndo->ndo_vflag <= 1)
869 print_unknown_data(ndo, bp, "\n\t ", olen);
870 break;
871 }
872 /* do we want to see an additionally hexdump ? */
873 if (ndo->ndo_vflag> 1)
874 print_unknown_data(ndo, bp, "\n\t ", olen);
875 bp += olen;
876 len -= olen;
877 }
878 break;
879 }
880
881 case PIMV2_TYPE_REGISTER:
882 {
883 const struct ip *ip;
884
885 if (len < 4)
886 goto trunc;
887 ND_TCHECK_LEN(bp, PIMV2_REGISTER_FLAG_LEN);
888
889 ND_PRINT(", Flags [ %s ]\n\t",
890 tok2str(pimv2_register_flag_values,
891 "none",
892 EXTRACT_BE_U_4(bp)));
893
894 bp += 4; len -= 4;
895 /* encapsulated multicast packet */
896 if (len == 0)
897 goto trunc;
898 ip = (const struct ip *)bp;
899 ND_TCHECK_1(ip->ip_vhl);
900 switch (IP_V(ip)) {
901 case 0: /* Null header */
902 ND_TCHECK_4(ip->ip_dst);
903 ND_PRINT("IP-Null-header %s > %s",
904 ipaddr_string(ndo, ip->ip_src),
905 ipaddr_string(ndo, ip->ip_dst));
906 break;
907
908 case 4: /* IPv4 */
909 ip_print(ndo, bp, len);
910 break;
911
912 case 6: /* IPv6 */
913 ip6_print(ndo, bp, len);
914 break;
915
916 default:
917 ND_PRINT("IP ver %u", IP_V(ip));
918 break;
919 }
920 break;
921 }
922
923 case PIMV2_TYPE_REGISTER_STOP:
924 ND_PRINT(" group=");
925 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
926 goto trunc;
927 bp += advance; len -= advance;
928 ND_PRINT(" source=");
929 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
930 goto trunc;
931 bp += advance; len -= advance;
932 break;
933
934 case PIMV2_TYPE_JOIN_PRUNE:
935 case PIMV2_TYPE_GRAFT:
936 case PIMV2_TYPE_GRAFT_ACK:
937
938
939 /*
940 * 0 1 2 3
941 * 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
942 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
943 * |PIM Ver| Type | Addr length | Checksum |
944 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
945 * | Unicast-Upstream Neighbor Address |
946 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
947 * | Reserved | Num groups | Holdtime |
948 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
949 * | Encoded-Multicast Group Address-1 |
950 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
951 * | Number of Joined Sources | Number of Pruned Sources |
952 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
953 * | Encoded-Joined Source Address-1 |
954 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
955 * | . |
956 * | . |
957 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
958 * | Encoded-Joined Source Address-n |
959 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
960 * | Encoded-Pruned Source Address-1 |
961 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
962 * | . |
963 * | . |
964 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
965 * | Encoded-Pruned Source Address-n |
966 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
967 * | . |
968 * | . |
969 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
970 * | Encoded-Multicast Group Address-n |
971 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
972 */
973
974 {
975 uint8_t ngroup;
976 uint16_t holdtime;
977 uint16_t njoin;
978 uint16_t nprune;
979 u_int i, j;
980
981 if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/
982 ND_PRINT(", upstream-neighbor: ");
983 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
984 goto trunc;
985 bp += advance; len -= advance;
986 }
987 if (len < 4)
988 goto trunc;
989 ND_TCHECK_4(bp);
990 ngroup = EXTRACT_U_1(bp + 1);
991 holdtime = EXTRACT_BE_U_2(bp + 2);
992 ND_PRINT("\n\t %u group(s)", ngroup);
993 if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/
994 ND_PRINT(", holdtime: ");
995 if (holdtime == 0xffff)
996 ND_PRINT("infinite");
997 else
998 unsigned_relts_print(ndo, holdtime);
999 }
1000 bp += 4; len -= 4;
1001 for (i = 0; i < ngroup; i++) {
1002 ND_PRINT("\n\t group #%u: ", i+1);
1003 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1004 goto trunc;
1005 bp += advance; len -= advance;
1006 if (len < 4)
1007 goto trunc;
1008 ND_TCHECK_4(bp);
1009 njoin = EXTRACT_BE_U_2(bp);
1010 nprune = EXTRACT_BE_U_2(bp + 2);
1011 ND_PRINT(", joined sources: %u, pruned sources: %u", njoin, nprune);
1012 bp += 4; len -= 4;
1013 for (j = 0; j < njoin; j++) {
1014 ND_PRINT("\n\t joined source #%u: ", j+1);
1015 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0)
1016 goto trunc;
1017 bp += advance; len -= advance;
1018 }
1019 for (j = 0; j < nprune; j++) {
1020 ND_PRINT("\n\t pruned source #%u: ", j+1);
1021 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0)
1022 goto trunc;
1023 bp += advance; len -= advance;
1024 }
1025 }
1026 break;
1027 }
1028
1029 case PIMV2_TYPE_BOOTSTRAP:
1030 {
1031 u_int i, j, frpcnt;
1032
1033 /* Fragment Tag, Hash Mask len, and BSR-priority */
1034 if (len < 2)
1035 goto trunc;
1036 ND_TCHECK_2(bp);
1037 ND_PRINT(" tag=%x", EXTRACT_BE_U_2(bp));
1038 bp += 2;
1039 len -= 2;
1040 if (len < 1)
1041 goto trunc;
1042 ND_TCHECK_1(bp);
1043 ND_PRINT(" hashmlen=%u", EXTRACT_U_1(bp));
1044 if (len < 2)
1045 goto trunc;
1046 ND_TCHECK_1(bp + 2);
1047 ND_PRINT(" BSRprio=%u", EXTRACT_U_1(bp + 1));
1048 bp += 2;
1049 len -= 2;
1050
1051 /* Encoded-Unicast-BSR-Address */
1052 ND_PRINT(" BSR=");
1053 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1054 goto trunc;
1055 bp += advance;
1056 len -= advance;
1057
1058 for (i = 0; len > 0; i++) {
1059 /* Encoded-Group Address */
1060 ND_PRINT(" (group%u: ", i);
1061 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1062 goto trunc;
1063 bp += advance;
1064 len -= advance;
1065
1066 /* RP-Count, Frag RP-Cnt, and rsvd */
1067 if (len < 1)
1068 goto trunc;
1069 ND_TCHECK_1(bp);
1070 ND_PRINT(" RPcnt=%u", EXTRACT_U_1(bp));
1071 if (len < 2)
1072 goto trunc;
1073 ND_TCHECK_1(bp + 1);
1074 frpcnt = EXTRACT_U_1(bp + 1);
1075 ND_PRINT(" FRPcnt=%u", frpcnt);
1076 if (len < 4)
1077 goto trunc;
1078 bp += 4;
1079 len -= 4;
1080
1081 for (j = 0; j < frpcnt && len > 0; j++) {
1082 /* each RP info */
1083 ND_PRINT(" RP%u=", j);
1084 if ((advance = pimv2_addr_print(ndo, bp, len,
1085 pimv2_unicast,
1086 pimv2_addr_len,
1087 0)) < 0)
1088 goto trunc;
1089 bp += advance;
1090 len -= advance;
1091
1092 if (len < 2)
1093 goto trunc;
1094 ND_TCHECK_2(bp);
1095 ND_PRINT(",holdtime=");
1096 unsigned_relts_print(ndo,
1097 EXTRACT_BE_U_2(bp));
1098 if (len < 3)
1099 goto trunc;
1100 ND_TCHECK_1(bp + 2);
1101 ND_PRINT(",prio=%u", EXTRACT_U_1(bp + 2));
1102 if (len < 4)
1103 goto trunc;
1104 bp += 4;
1105 len -= 4;
1106 }
1107 ND_PRINT(")");
1108 }
1109 break;
1110 }
1111 case PIMV2_TYPE_ASSERT:
1112 ND_PRINT(" group=");
1113 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1114 goto trunc;
1115 bp += advance; len -= advance;
1116 ND_PRINT(" src=");
1117 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1118 goto trunc;
1119 bp += advance; len -= advance;
1120 if (len < 8)
1121 goto trunc;
1122 ND_TCHECK_8(bp);
1123 if (EXTRACT_U_1(bp) & 0x80)
1124 ND_PRINT(" RPT");
1125 ND_PRINT(" pref=%u", EXTRACT_BE_U_4(bp) & 0x7fffffff);
1126 ND_PRINT(" metric=%u", EXTRACT_BE_U_4(bp + 4));
1127 break;
1128
1129 case PIMV2_TYPE_CANDIDATE_RP:
1130 {
1131 u_int i, pfxcnt;
1132
1133 /* Prefix-Cnt, Priority, and Holdtime */
1134 if (len < 1)
1135 goto trunc;
1136 ND_TCHECK_1(bp);
1137 ND_PRINT(" prefix-cnt=%u", EXTRACT_U_1(bp));
1138 pfxcnt = EXTRACT_U_1(bp);
1139 if (len < 2)
1140 goto trunc;
1141 ND_TCHECK_1(bp + 1);
1142 ND_PRINT(" prio=%u", EXTRACT_U_1(bp + 1));
1143 if (len < 4)
1144 goto trunc;
1145 ND_TCHECK_2(bp + 2);
1146 ND_PRINT(" holdtime=");
1147 unsigned_relts_print(ndo, EXTRACT_BE_U_2(bp + 2));
1148 bp += 4;
1149 len -= 4;
1150
1151 /* Encoded-Unicast-RP-Address */
1152 ND_PRINT(" RP=");
1153 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1154 goto trunc;
1155 bp += advance;
1156 len -= advance;
1157
1158 /* Encoded-Group Addresses */
1159 for (i = 0; i < pfxcnt && len > 0; i++) {
1160 ND_PRINT(" Group%u=", i);
1161 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1162 goto trunc;
1163 bp += advance;
1164 len -= advance;
1165 }
1166 break;
1167 }
1168
1169 case PIMV2_TYPE_PRUNE_REFRESH:
1170 ND_PRINT(" src=");
1171 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1172 goto trunc;
1173 bp += advance;
1174 len -= advance;
1175 ND_PRINT(" grp=");
1176 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1177 goto trunc;
1178 bp += advance;
1179 len -= advance;
1180 ND_PRINT(" forwarder=");
1181 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1182 goto trunc;
1183 bp += advance;
1184 len -= advance;
1185 if (len < 2)
1186 goto trunc;
1187 ND_TCHECK_2(bp);
1188 ND_PRINT(" TUNR ");
1189 unsigned_relts_print(ndo, EXTRACT_BE_U_2(bp));
1190 break;
1191
1192
1193 default:
1194 ND_PRINT(" [type %u]", PIM_TYPE(pim_typever));
1195 break;
1196 }
1197
1198 return;
1199
1200 trunc:
1201 ND_PRINT("[|pim]");
1202 }
1203
1204 /*
1205 * Local Variables:
1206 * c-style: whitesmith
1207 * c-basic-offset: 8
1208 * End:
1209 */
[mirror] the TCPdump network dissector