]> The Tcpdump Group git mirrors - tcpdump/blob - print-pim.c
projects / tcpdump / blob
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
Fix a bunch of de-constifications.
[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 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #include <tcpdump-stdinc.h>
27
28 #include "interface.h"
29 #include "addrtoname.h"
30 #include "extract.h"
31
32 #include "ip.h"
33
34 #define PIMV1_TYPE_QUERY 0
35 #define PIMV1_TYPE_REGISTER 1
36 #define PIMV1_TYPE_REGISTER_STOP 2
37 #define PIMV1_TYPE_JOIN_PRUNE 3
38 #define PIMV1_TYPE_RP_REACHABILITY 4
39 #define PIMV1_TYPE_ASSERT 5
40 #define PIMV1_TYPE_GRAFT 6
41 #define PIMV1_TYPE_GRAFT_ACK 7
42
43 static const struct tok pimv1_type_str[] = {
44 { PIMV1_TYPE_QUERY, "Query" },
45 { PIMV1_TYPE_REGISTER, "Register" },
46 { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" },
47 { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" },
48 { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" },
49 { PIMV1_TYPE_ASSERT, "Assert" },
50 { PIMV1_TYPE_GRAFT, "Graft" },
51 { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" },
52 { 0, NULL }
53 };
54
55 #define PIMV2_TYPE_HELLO 0
56 #define PIMV2_TYPE_REGISTER 1
57 #define PIMV2_TYPE_REGISTER_STOP 2
58 #define PIMV2_TYPE_JOIN_PRUNE 3
59 #define PIMV2_TYPE_BOOTSTRAP 4
60 #define PIMV2_TYPE_ASSERT 5
61 #define PIMV2_TYPE_GRAFT 6
62 #define PIMV2_TYPE_GRAFT_ACK 7
63 #define PIMV2_TYPE_CANDIDATE_RP 8
64 #define PIMV2_TYPE_PRUNE_REFRESH 9
65 #define PIMV2_TYPE_DF_ELECTION 10
66 #define PIMV2_TYPE_ECMP_REDIRECT 11
67
68 static const struct tok pimv2_type_values[] = {
69 { PIMV2_TYPE_HELLO, "Hello" },
70 { PIMV2_TYPE_REGISTER, "Register" },
71 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
72 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" },
73 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" },
74 { PIMV2_TYPE_ASSERT, "Assert" },
75 { PIMV2_TYPE_GRAFT, "Graft" },
76 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" },
77 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" },
78 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
79 { PIMV2_TYPE_DF_ELECTION, "DF Election" },
80 { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" },
81 { 0, NULL}
82 };
83
84 #define PIMV2_HELLO_OPTION_HOLDTIME 1
85 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2
86 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18
87 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19
88 #define PIMV2_HELLO_OPTION_GENID 20
89 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21
90 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22
91 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24
92 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
93
94 static const struct tok pimv2_hello_option_values[] = {
95 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" },
96 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" },
97 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" },
98 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" },
99 { PIMV2_HELLO_OPTION_GENID, "Generation ID" },
100 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" },
101 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" },
102 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" },
103 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
104 { 0, NULL}
105 };
106
107 #define PIMV2_REGISTER_FLAG_LEN 4
108 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000
109 #define PIMV2_REGISTER_FLAG_NULL 0x40000000
110
111 static const struct tok pimv2_register_flag_values[] = {
112 { PIMV2_REGISTER_FLAG_BORDER, "Border" },
113 { PIMV2_REGISTER_FLAG_NULL, "Null" },
114 { 0, NULL}
115 };
116
117 /*
118 * XXX: We consider a case where IPv6 is not ready yet for portability,
119 * but PIM dependent defintions should be independent of IPv6...
120 */
121
122 struct pim {
123 uint8_t pim_typever;
124 /* upper 4bit: PIM version number; 2 for PIMv2 */
125 /* lower 4bit: the PIM message type, currently they are:
126 * Hello, Register, Register-Stop, Join/Prune,
127 * Bootstrap, Assert, Graft (PIM-DM only),
128 * Graft-Ack (PIM-DM only), C-RP-Adv
129 */
130 #define PIM_VER(x) (((x) & 0xf0) >> 4)
131 #define PIM_TYPE(x) ((x) & 0x0f)
132 u_char pim_rsv; /* Reserved */
133 u_short pim_cksum; /* IP style check sum */
134 };
135
136 static void pimv2_print(netdissect_options *, register const u_char *bp, register u_int len, u_int cksum);
137
138 static void
139 pimv1_join_prune_print(netdissect_options *ndo,
140 register const u_char *bp, register u_int len)
141 {
142 int ngroups, njoin, nprune;
143 int njp;
144
145 /* If it's a single group and a single source, use 1-line output. */
146 if (ND_TTEST2(bp[0], 30) && bp[11] == 1 &&
147 ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
148 int hold;
149
150 ND_PRINT((ndo, " RPF %s ", ipaddr_string(ndo, bp)));
151 hold = EXTRACT_16BITS(&bp[6]);
152 if (hold != 180) {
153 ND_PRINT((ndo, "Hold "));
154 relts_print(ndo, hold);
155 }
156 ND_PRINT((ndo, "%s (%s/%d, %s", njoin ? "Join" : "Prune",
157 ipaddr_string(ndo, &bp[26]), bp[25] & 0x3f,
158 ipaddr_string(ndo, &bp[12])));
159 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
160 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[16])));
161 ND_PRINT((ndo, ") %s%s %s",
162 (bp[24] & 0x01) ? "Sparse" : "Dense",
163 (bp[25] & 0x80) ? " WC" : "",
164 (bp[25] & 0x40) ? "RP" : "SPT"));
165 return;
166 }
167
168 ND_TCHECK2(bp[0], sizeof(struct in_addr));
169 if (ndo->ndo_vflag > 1)
170 ND_PRINT((ndo, "\n"));
171 ND_PRINT((ndo, " Upstream Nbr: %s", ipaddr_string(ndo, bp)));
172 ND_TCHECK2(bp[6], 2);
173 if (ndo->ndo_vflag > 1)
174 ND_PRINT((ndo, "\n"));
175 ND_PRINT((ndo, " Hold time: "));
176 relts_print(ndo, EXTRACT_16BITS(&bp[6]));
177 if (ndo->ndo_vflag < 2)
178 return;
179 bp += 8;
180 len -= 8;
181
182 ND_TCHECK2(bp[0], 4);
183 ngroups = bp[3];
184 bp += 4;
185 len -= 4;
186 while (ngroups--) {
187 /*
188 * XXX - does the address have length "addrlen" and the
189 * mask length "maddrlen"?
190 */
191 ND_TCHECK2(bp[0], sizeof(struct in_addr));
192 ND_PRINT((ndo, "\n\tGroup: %s", ipaddr_string(ndo, bp)));
193 ND_TCHECK2(bp[4], sizeof(struct in_addr));
194 if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
195 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[4])));
196 ND_TCHECK2(bp[8], 4);
197 njoin = EXTRACT_16BITS(&bp[8]);
198 nprune = EXTRACT_16BITS(&bp[10]);
199 ND_PRINT((ndo, " joined: %d pruned: %d", njoin, nprune));
200 bp += 12;
201 len -= 12;
202 for (njp = 0; njp < (njoin + nprune); njp++) {
203 const char *type;
204
205 if (njp < njoin)
206 type = "Join ";
207 else
208 type = "Prune";
209 ND_TCHECK2(bp[0], 6);
210 ND_PRINT((ndo, "\n\t%s %s%s%s%s/%d", type,
211 (bp[0] & 0x01) ? "Sparse " : "Dense ",
212 (bp[1] & 0x80) ? "WC " : "",
213 (bp[1] & 0x40) ? "RP " : "SPT ",
214 ipaddr_string(ndo, &bp[2]), bp[1] & 0x3f));
215 bp += 6;
216 len -= 6;
217 }
218 }
219 return;
220 trunc:
221 ND_PRINT((ndo, "[|pim]"));
222 return;
223 }
224
225 void
226 pimv1_print(netdissect_options *ndo,
227 register const u_char *bp, register u_int len)
228 {
229 register const u_char *ep;
230 register u_char type;
231
232 ep = (const u_char *)ndo->ndo_snapend;
233 if (bp >= ep)
234 return;
235
236 ND_TCHECK(bp[1]);
237 type = bp[1];
238
239 ND_PRINT((ndo, " %s", tok2str(pimv1_type_str, "[type %u]", type)));
240 switch (type) {
241 case PIMV1_TYPE_QUERY:
242 if (ND_TTEST(bp[8])) {
243 switch (bp[8] >> 4) {
244 case 0:
245 ND_PRINT((ndo, " Dense-mode"));
246 break;
247 case 1:
248 ND_PRINT((ndo, " Sparse-mode"));
249 break;
250 case 2:
251 ND_PRINT((ndo, " Sparse-Dense-mode"));
252 break;
253 default:
254 ND_PRINT((ndo, " mode-%d", bp[8] >> 4));
255 break;
256 }
257 }
258 if (ndo->ndo_vflag) {
259 ND_TCHECK2(bp[10],2);
260 ND_PRINT((ndo, " (Hold-time "));
261 relts_print(ndo, EXTRACT_16BITS(&bp[10]));
262 ND_PRINT((ndo, ")"));
263 }
264 break;
265
266 case PIMV1_TYPE_REGISTER:
267 ND_TCHECK2(bp[8], 20); /* ip header */
268 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[20]),
269 ipaddr_string(ndo, &bp[24])));
270 break;
271 case PIMV1_TYPE_REGISTER_STOP:
272 ND_TCHECK2(bp[12], sizeof(struct in_addr));
273 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[8]),
274 ipaddr_string(ndo, &bp[12])));
275 break;
276 case PIMV1_TYPE_RP_REACHABILITY:
277 if (ndo->ndo_vflag) {
278 ND_TCHECK2(bp[22], 2);
279 ND_PRINT((ndo, " group %s", ipaddr_string(ndo, &bp[8])));
280 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
281 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12])));
282 ND_PRINT((ndo, " RP %s hold ", ipaddr_string(ndo, &bp[16])));
283 relts_print(ndo, EXTRACT_16BITS(&bp[22]));
284 }
285 break;
286 case PIMV1_TYPE_ASSERT:
287 ND_TCHECK2(bp[16], sizeof(struct in_addr));
288 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[16]),
289 ipaddr_string(ndo, &bp[8])));
290 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
291 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12])));
292 ND_TCHECK2(bp[24], 4);
293 ND_PRINT((ndo, " %s pref %d metric %d",
294 (bp[20] & 0x80) ? "RP-tree" : "SPT",
295 EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
296 EXTRACT_32BITS(&bp[24])));
297 break;
298 case PIMV1_TYPE_JOIN_PRUNE:
299 case PIMV1_TYPE_GRAFT:
300 case PIMV1_TYPE_GRAFT_ACK:
301 if (ndo->ndo_vflag)
302 pimv1_join_prune_print(ndo, &bp[8], len - 8);
303 break;
304 }
305 if ((bp[4] >> 4) != 1)
306 ND_PRINT((ndo, " [v%d]", bp[4] >> 4));
307 return;
308
309 trunc:
310 ND_PRINT((ndo, "[|pim]"));
311 return;
312 }
313
314 /*
315 * auto-RP is a cisco protocol, documented at
316 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
317 *
318 * This implements version 1+, dated Sept 9, 1998.
319 */
320 void
321 cisco_autorp_print(netdissect_options *ndo,
322 register const u_char *bp, register u_int len)
323 {
324 int type;
325 int numrps;
326 int hold;
327
328 ND_TCHECK(bp[0]);
329 ND_PRINT((ndo, " auto-rp "));
330 type = bp[0];
331 switch (type) {
332 case 0x11:
333 ND_PRINT((ndo, "candidate-advert"));
334 break;
335 case 0x12:
336 ND_PRINT((ndo, "mapping"));
337 break;
338 default:
339 ND_PRINT((ndo, "type-0x%02x", type));
340 break;
341 }
342
343 ND_TCHECK(bp[1]);
344 numrps = bp[1];
345
346 ND_TCHECK2(bp[2], 2);
347 ND_PRINT((ndo, " Hold "));
348 hold = EXTRACT_16BITS(&bp[2]);
349 if (hold)
350 relts_print(ndo, EXTRACT_16BITS(&bp[2]));
351 else
352 ND_PRINT((ndo, "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 ND_TCHECK2(bp[0], 4);
376 ND_PRINT((ndo, " RP %s", ipaddr_string(ndo, bp)));
377 ND_TCHECK(bp[4]);
378 switch (bp[4] & 0x3) {
379 case 0: ND_PRINT((ndo, " PIMv?"));
380 break;
381 case 1: ND_PRINT((ndo, " PIMv1"));
382 break;
383 case 2: ND_PRINT((ndo, " PIMv2"));
384 break;
385 case 3: ND_PRINT((ndo, " PIMv1+2"));
386 break;
387 }
388 if (bp[4] & 0xfc)
389 ND_PRINT((ndo, " [rsvd=0x%02x]", bp[4] & 0xfc));
390 ND_TCHECK(bp[5]);
391 nentries = bp[5];
392 bp += 6; len -= 6;
393 s = ' ';
394 for (; nentries; nentries--) {
395 ND_TCHECK2(bp[0], 6);
396 ND_PRINT((ndo, "%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
397 ipaddr_string(ndo, &bp[2]), bp[1]));
398 if (bp[0] & 0x02) {
399 ND_PRINT((ndo, " bidir"));
400 }
401 if (bp[0] & 0xfc) {
402 ND_PRINT((ndo, "[rsvd=0x%02x]", bp[0] & 0xfc));
403 }
404 s = ',';
405 bp += 6; len -= 6;
406 }
407 }
408 return;
409
410 trunc:
411 ND_PRINT((ndo, "[|autorp]"));
412 return;
413 }
414
415 void
416 pim_print(netdissect_options *ndo,
417 register const u_char *bp, register u_int len, u_int cksum)
418 {
419 register const u_char *ep;
420 register const struct pim *pim = (const struct pim *)bp;
421
422 ep = (const u_char *)ndo->ndo_snapend;
423 if (bp >= ep)
424 return;
425 #ifdef notyet /* currently we see only version and type */
426 ND_TCHECK(pim->pim_rsv);
427 #endif
428
429 switch (PIM_VER(pim->pim_typever)) {
430 case 2:
431 if (!ndo->ndo_vflag) {
432 ND_PRINT((ndo, "PIMv%u, %s, length %u",
433 PIM_VER(pim->pim_typever),
434 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
435 len));
436 return;
437 } else {
438 ND_PRINT((ndo, "PIMv%u, length %u\n\t%s",
439 PIM_VER(pim->pim_typever),
440 len,
441 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever))));
442 pimv2_print(ndo, bp, len, cksum);
443 }
444 break;
445 default:
446 ND_PRINT((ndo, "PIMv%u, length %u",
447 PIM_VER(pim->pim_typever),
448 len));
449 break;
450 }
451 return;
452 }
453
454 /*
455 * PIMv2 uses encoded address representations.
456 *
457 * The last PIM-SM I-D before RFC2117 was published specified the
458 * following representation for unicast addresses. However, RFC2117
459 * specified no encoding for unicast addresses with the unicast
460 * address length specified in the header. Therefore, we have to
461 * guess which encoding is being used (Cisco's PIMv2 implementation
462 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
463 * field into a 'unicast-address-length-in-bytes' field. We guess
464 * that it's the draft encoding if this reserved field is zero.
465 *
466 * RFC2362 goes back to the encoded format, and calls the addr length
467 * field "reserved" again.
468 *
469 * The first byte is the address family, from:
470 *
471 * 0 Reserved
472 * 1 IP (IP version 4)
473 * 2 IP6 (IP version 6)
474 * 3 NSAP
475 * 4 HDLC (8-bit multidrop)
476 * 5 BBN 1822
477 * 6 802 (includes all 802 media plus Ethernet "canonical format")
478 * 7 E.163
479 * 8 E.164 (SMDS, Frame Relay, ATM)
480 * 9 F.69 (Telex)
481 * 10 X.121 (X.25, Frame Relay)
482 * 11 IPX
483 * 12 Appletalk
484 * 13 Decnet IV
485 * 14 Banyan Vines
486 * 15 E.164 with NSAP format subaddress
487 *
488 * In addition, the second byte is an "Encoding". 0 is the default
489 * encoding for the address family, and no other encodings are currently
490 * specified.
491 *
492 */
493
494 static int pimv2_addr_len;
495
496 enum pimv2_addrtype {
497 pimv2_unicast, pimv2_group, pimv2_source
498 };
499
500 /* 0 1 2 3
501 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
502 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
503 * | Addr Family | Encoding Type | Unicast Address |
504 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
505 * 0 1 2 3
506 * 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
507 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
508 * | Addr Family | Encoding Type | Reserved | Mask Len |
509 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
510 * | Group multicast Address |
511 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
512 * 0 1 2 3
513 * 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
514 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
515 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
516 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
517 * | Source Address |
518 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
519 */
520 static int
521 pimv2_addr_print(netdissect_options *ndo,
522 const u_char *bp, enum pimv2_addrtype at, int silent)
523 {
524 int af;
525 int len, hdrlen;
526
527 ND_TCHECK(bp[0]);
528
529 if (pimv2_addr_len == 0) {
530 ND_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 ND_TCHECK2(bp[0], len);
570 if (af == AF_INET) {
571 if (!silent)
572 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp)));
573 }
574 #ifdef INET6
575 else if (af == AF_INET6) {
576 if (!silent)
577 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp)));
578 }
579 #endif
580 return hdrlen + len;
581 case pimv2_group:
582 case pimv2_source:
583 ND_TCHECK2(bp[0], len + 2);
584 if (af == AF_INET) {
585 if (!silent) {
586 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp + 2)));
587 if (bp[1] != 32)
588 ND_PRINT((ndo, "/%u", bp[1]));
589 }
590 }
591 #ifdef INET6
592 else if (af == AF_INET6) {
593 if (!silent) {
594 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp + 2)));
595 if (bp[1] != 128)
596 ND_PRINT((ndo, "/%u", bp[1]));
597 }
598 }
599 #endif
600 if (bp[0] && !silent) {
601 if (at == pimv2_group) {
602 ND_PRINT((ndo, "(0x%02x)", bp[0]));
603 } else {
604 ND_PRINT((ndo, "(%s%s%s",
605 bp[0] & 0x04 ? "S" : "",
606 bp[0] & 0x02 ? "W" : "",
607 bp[0] & 0x01 ? "R" : ""));
608 if (bp[0] & 0xf8) {
609 ND_PRINT((ndo, "+0x%02x", bp[0] & 0xf8));
610 }
611 ND_PRINT((ndo, ")"));
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(netdissect_options *ndo,
624 register const u_char *bp, register u_int len, u_int cksum)
625 {
626 register const u_char *ep;
627 register const struct pim *pim = (const struct pim *)bp;
628 int advance;
629
630 ep = (const u_char *)ndo->ndo_snapend;
631 if (bp >= ep)
632 return;
633 if (ep > bp + len)
634 ep = bp + len;
635 ND_TCHECK(pim->pim_rsv);
636 pimv2_addr_len = pim->pim_rsv;
637 if (pimv2_addr_len != 0)
638 ND_PRINT((ndo, ", RFC2117-encoding"));
639
640 ND_PRINT((ndo, ", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum)));
641 if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
642 ND_PRINT((ndo, "(unverified)"));
643 } else {
644 ND_PRINT((ndo, "(%scorrect)", ND_TTEST2(bp[0], len) && cksum ? "in" : "" ));
645 }
646
647 switch (PIM_TYPE(pim->pim_typever)) {
648 case PIMV2_TYPE_HELLO:
649 {
650 uint16_t otype, olen;
651 bp += 4;
652 while (bp < ep) {
653 ND_TCHECK2(bp[0], 4);
654 otype = EXTRACT_16BITS(&bp[0]);
655 olen = EXTRACT_16BITS(&bp[2]);
656 ND_TCHECK2(bp[0], 4 + olen);
657 ND_PRINT((ndo, "\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(ndo, EXTRACT_16BITS(bp));
666 break;
667
668 case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
669 if (olen != 4) {
670 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
671 } else {
672 char t_bit;
673 uint16_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 ND_PRINT((ndo, "\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 ND_PRINT((ndo, "Bi-Directional Capability (Old)"));
688 break;
689 case 4:
690 ND_PRINT((ndo, "%u", EXTRACT_32BITS(bp)));
691 break;
692 default:
693 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
694 break;
695 }
696 break;
697
698 case PIMV2_HELLO_OPTION_GENID:
699 ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(bp)));
700 break;
701
702 case PIMV2_HELLO_OPTION_REFRESH_CAP:
703 ND_PRINT((ndo, "v%d", *bp));
704 if (*(bp+1) != 0) {
705 ND_PRINT((ndo, ", interval "));
706 relts_print(ndo, *(bp+1));
707 }
708 if (EXTRACT_16BITS(bp+2) != 0) {
709 ND_PRINT((ndo, " ?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 (ndo->ndo_vflag > 1) {
719 const u_char *ptr = bp;
720 while (ptr < (bp+olen)) {
721 int advance;
722
723 ND_PRINT((ndo, "\n\t "));
724 advance = pimv2_addr_print(ndo, ptr, pimv2_unicast, 0);
725 if (advance < 0) {
726 ND_PRINT((ndo, "..."));
727 break;
728 }
729 ptr += advance;
730 }
731 }
732 break;
733 default:
734 if (ndo->ndo_vflag <= 1)
735 print_unknown_data(ndo, bp, "\n\t ", olen);
736 break;
737 }
738 /* do we want to see an additionally hexdump ? */
739 if (ndo->ndo_vflag> 1)
740 print_unknown_data(ndo, bp, "\n\t ", olen);
741 bp += olen;
742 }
743 break;
744 }
745
746 case PIMV2_TYPE_REGISTER:
747 {
748 const struct ip *ip;
749
750 ND_TCHECK2(*(bp + 4), PIMV2_REGISTER_FLAG_LEN);
751
752 ND_PRINT((ndo, ", Flags [ %s ]\n\t",
753 tok2str(pimv2_register_flag_values,
754 "none",
755 EXTRACT_32BITS(bp+4))));
756
757 bp += 8; len -= 8;
758 /* encapsulated multicast packet */
759 ip = (const struct ip *)bp;
760 switch (IP_V(ip)) {
761 case 0: /* Null header */
762 ND_PRINT((ndo, "IP-Null-header %s > %s",
763 ipaddr_string(ndo, &ip->ip_src),
764 ipaddr_string(ndo, &ip->ip_dst)));
765 break;
766
767 case 4: /* IPv4 */
768 ip_print(ndo, bp, len);
769 break;
770
771 case 6: /* IPv6 */
772 ip6_print(ndo, bp, len);
773 break;
774
775 default:
776 ND_PRINT((ndo, "IP ver %d", IP_V(ip)));
777 break;
778 }
779 break;
780 }
781
782 case PIMV2_TYPE_REGISTER_STOP:
783 bp += 4; len -= 4;
784 if (bp >= ep)
785 break;
786 ND_PRINT((ndo, " group="));
787 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
788 ND_PRINT((ndo, "..."));
789 break;
790 }
791 bp += advance; len -= advance;
792 if (bp >= ep)
793 break;
794 ND_PRINT((ndo, " source="));
795 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
796 ND_PRINT((ndo, "..."));
797 break;
798 }
799 bp += advance; len -= advance;
800 break;
801
802 case PIMV2_TYPE_JOIN_PRUNE:
803 case PIMV2_TYPE_GRAFT:
804 case PIMV2_TYPE_GRAFT_ACK:
805
806
807 /*
808 * 0 1 2 3
809 * 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
810 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
811 * |PIM Ver| Type | Addr length | Checksum |
812 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
813 * | Unicast-Upstream Neighbor Address |
814 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
815 * | Reserved | Num groups | Holdtime |
816 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
817 * | Encoded-Multicast Group Address-1 |
818 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
819 * | Number of Joined Sources | Number of Pruned Sources |
820 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
821 * | Encoded-Joined Source Address-1 |
822 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
823 * | . |
824 * | . |
825 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
826 * | Encoded-Joined Source Address-n |
827 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
828 * | Encoded-Pruned Source Address-1 |
829 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
830 * | . |
831 * | . |
832 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
833 * | Encoded-Pruned Source Address-n |
834 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
835 * | . |
836 * | . |
837 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
838 * | Encoded-Multicast Group Address-n |
839 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
840 */
841
842 {
843 uint8_t ngroup;
844 uint16_t holdtime;
845 uint16_t njoin;
846 uint16_t nprune;
847 int i, j;
848
849 bp += 4; len -= 4;
850 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
851 if (bp >= ep)
852 break;
853 ND_PRINT((ndo, ", upstream-neighbor: "));
854 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
855 ND_PRINT((ndo, "..."));
856 break;
857 }
858 bp += advance; len -= advance;
859 }
860 if (bp + 4 > ep)
861 break;
862 ngroup = bp[1];
863 holdtime = EXTRACT_16BITS(&bp[2]);
864 ND_PRINT((ndo, "\n\t %u group(s)", ngroup));
865 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
866 ND_PRINT((ndo, ", holdtime: "));
867 if (holdtime == 0xffff)
868 ND_PRINT((ndo, "infinite"));
869 else
870 relts_print(ndo, holdtime);
871 }
872 bp += 4; len -= 4;
873 for (i = 0; i < ngroup; i++) {
874 if (bp >= ep)
875 goto jp_done;
876 ND_PRINT((ndo, "\n\t group #%u: ", i+1));
877 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
878 ND_PRINT((ndo, "...)"));
879 goto jp_done;
880 }
881 bp += advance; len -= advance;
882 if (bp + 4 > ep) {
883 ND_PRINT((ndo, "...)"));
884 goto jp_done;
885 }
886 njoin = EXTRACT_16BITS(&bp[0]);
887 nprune = EXTRACT_16BITS(&bp[2]);
888 ND_PRINT((ndo, ", joined sources: %u, pruned sources: %u", njoin, nprune));
889 bp += 4; len -= 4;
890 for (j = 0; j < njoin; j++) {
891 ND_PRINT((ndo, "\n\t joined source #%u: ", j+1));
892 if ((advance = pimv2_addr_print(ndo, bp, pimv2_source, 0)) < 0) {
893 ND_PRINT((ndo, "...)"));
894 goto jp_done;
895 }
896 bp += advance; len -= advance;
897 }
898 for (j = 0; j < nprune; j++) {
899 ND_PRINT((ndo, "\n\t pruned source #%u: ", j+1));
900 if ((advance = pimv2_addr_print(ndo, bp, pimv2_source, 0)) < 0) {
901 ND_PRINT((ndo, "...)"));
902 goto jp_done;
903 }
904 bp += advance; len -= advance;
905 }
906 }
907 jp_done:
908 break;
909 }
910
911 case PIMV2_TYPE_BOOTSTRAP:
912 {
913 int i, j, frpcnt;
914 bp += 4;
915
916 /* Fragment Tag, Hash Mask len, and BSR-priority */
917 if (bp + sizeof(uint16_t) >= ep) break;
918 ND_PRINT((ndo, " tag=%x", EXTRACT_16BITS(bp)));
919 bp += sizeof(uint16_t);
920 if (bp >= ep) break;
921 ND_PRINT((ndo, " hashmlen=%d", bp[0]));
922 if (bp + 1 >= ep) break;
923 ND_PRINT((ndo, " BSRprio=%d", bp[1]));
924 bp += 2;
925
926 /* Encoded-Unicast-BSR-Address */
927 if (bp >= ep) break;
928 ND_PRINT((ndo, " BSR="));
929 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
930 ND_PRINT((ndo, "..."));
931 break;
932 }
933 bp += advance;
934
935 for (i = 0; bp < ep; i++) {
936 /* Encoded-Group Address */
937 ND_PRINT((ndo, " (group%d: ", i));
938 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0))
939 < 0) {
940 ND_PRINT((ndo, "...)"));
941 goto bs_done;
942 }
943 bp += advance;
944
945 /* RP-Count, Frag RP-Cnt, and rsvd */
946 if (bp >= ep) {
947 ND_PRINT((ndo, "...)"));
948 goto bs_done;
949 }
950 ND_PRINT((ndo, " RPcnt=%d", bp[0]));
951 if (bp + 1 >= ep) {
952 ND_PRINT((ndo, "...)"));
953 goto bs_done;
954 }
955 ND_PRINT((ndo, " FRPcnt=%d", frpcnt = bp[1]));
956 bp += 4;
957
958 for (j = 0; j < frpcnt && bp < ep; j++) {
959 /* each RP info */
960 ND_PRINT((ndo, " RP%d=", j));
961 if ((advance = pimv2_addr_print(ndo, bp,
962 pimv2_unicast,
963 0)) < 0) {
964 ND_PRINT((ndo, "...)"));
965 goto bs_done;
966 }
967 bp += advance;
968
969 if (bp + 1 >= ep) {
970 ND_PRINT((ndo, "...)"));
971 goto bs_done;
972 }
973 ND_PRINT((ndo, ",holdtime="));
974 relts_print(ndo, EXTRACT_16BITS(bp));
975 if (bp + 2 >= ep) {
976 ND_PRINT((ndo, "...)"));
977 goto bs_done;
978 }
979 ND_PRINT((ndo, ",prio=%d", bp[2]));
980 bp += 4;
981 }
982 ND_PRINT((ndo, ")"));
983 }
984 bs_done:
985 break;
986 }
987 case PIMV2_TYPE_ASSERT:
988 bp += 4; len -= 4;
989 if (bp >= ep)
990 break;
991 ND_PRINT((ndo, " group="));
992 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
993 ND_PRINT((ndo, "..."));
994 break;
995 }
996 bp += advance; len -= advance;
997 if (bp >= ep)
998 break;
999 ND_PRINT((ndo, " src="));
1000 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1001 ND_PRINT((ndo, "..."));
1002 break;
1003 }
1004 bp += advance; len -= advance;
1005 if (bp + 8 > ep)
1006 break;
1007 if (bp[0] & 0x80)
1008 ND_PRINT((ndo, " RPT"));
1009 ND_PRINT((ndo, " pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff));
1010 ND_PRINT((ndo, " metric=%u", EXTRACT_32BITS(&bp[4])));
1011 break;
1012
1013 case PIMV2_TYPE_CANDIDATE_RP:
1014 {
1015 int i, pfxcnt;
1016 bp += 4;
1017
1018 /* Prefix-Cnt, Priority, and Holdtime */
1019 if (bp >= ep) break;
1020 ND_PRINT((ndo, " prefix-cnt=%d", bp[0]));
1021 pfxcnt = bp[0];
1022 if (bp + 1 >= ep) break;
1023 ND_PRINT((ndo, " prio=%d", bp[1]));
1024 if (bp + 3 >= ep) break;
1025 ND_PRINT((ndo, " holdtime="));
1026 relts_print(ndo, EXTRACT_16BITS(&bp[2]));
1027 bp += 4;
1028
1029 /* Encoded-Unicast-RP-Address */
1030 if (bp >= ep) break;
1031 ND_PRINT((ndo, " RP="));
1032 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1033 ND_PRINT((ndo, "..."));
1034 break;
1035 }
1036 bp += advance;
1037
1038 /* Encoded-Group Addresses */
1039 for (i = 0; i < pfxcnt && bp < ep; i++) {
1040 ND_PRINT((ndo, " Group%d=", i));
1041 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0))
1042 < 0) {
1043 ND_PRINT((ndo, "..."));
1044 break;
1045 }
1046 bp += advance;
1047 }
1048 break;
1049 }
1050
1051 case PIMV2_TYPE_PRUNE_REFRESH:
1052 ND_PRINT((ndo, " src="));
1053 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1054 ND_PRINT((ndo, "..."));
1055 break;
1056 }
1057 bp += advance;
1058 ND_PRINT((ndo, " grp="));
1059 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
1060 ND_PRINT((ndo, "..."));
1061 break;
1062 }
1063 bp += advance;
1064 ND_PRINT((ndo, " forwarder="));
1065 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1066 ND_PRINT((ndo, "..."));
1067 break;
1068 }
1069 bp += advance;
1070 ND_TCHECK2(bp[0], 2);
1071 ND_PRINT((ndo, " TUNR "));
1072 relts_print(ndo, EXTRACT_16BITS(bp));
1073 break;
1074
1075
1076 default:
1077 ND_PRINT((ndo, " [type %d]", PIM_TYPE(pim->pim_typever)));
1078 break;
1079 }
1080
1081 return;
1082
1083 trunc:
1084 ND_PRINT((ndo, "[|pim]"));
1085 }
1086
1087 /*
1088 * Local Variables:
1089 * c-style: whitesmith
1090 * c-basic-offset: 8
1091 * End:
1092 */
[mirror] the TCPdump network dissector