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etc/services - sync with NetBSD-8
[minix.git] / external / bsd / tcpdump / dist / print-pim.c
blobf2a1a4da74e258f1af4ccb7728965dda09604e10
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 #include <sys/cdefs.h>
23 #ifndef lint
24 __RCSID("$NetBSD: print-pim.c,v 1.7 2015/03/31 21:59:35 christos Exp $");
25 #endif
26
27 #define NETDISSECT_REWORKED
28 #ifdef HAVE_CONFIG_H
29 #include "config.h"
30 #endif
31
32 #include <tcpdump-stdinc.h>
33
34 #include "interface.h"
35 #include "addrtoname.h"
36 #include "extract.h"
37
38 #include "ip.h"
39
40 #define PIMV1_TYPE_QUERY 0
41 #define PIMV1_TYPE_REGISTER 1
42 #define PIMV1_TYPE_REGISTER_STOP 2
43 #define PIMV1_TYPE_JOIN_PRUNE 3
44 #define PIMV1_TYPE_RP_REACHABILITY 4
45 #define PIMV1_TYPE_ASSERT 5
46 #define PIMV1_TYPE_GRAFT 6
47 #define PIMV1_TYPE_GRAFT_ACK 7
48
49 static const struct tok pimv1_type_str[] = {
50 { PIMV1_TYPE_QUERY, "Query" },
51 { PIMV1_TYPE_REGISTER, "Register" },
52 { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" },
53 { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" },
54 { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" },
55 { PIMV1_TYPE_ASSERT, "Assert" },
56 { PIMV1_TYPE_GRAFT, "Graft" },
57 { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" },
58 { 0, NULL }
59 };
60
61 #define PIMV2_TYPE_HELLO 0
62 #define PIMV2_TYPE_REGISTER 1
63 #define PIMV2_TYPE_REGISTER_STOP 2
64 #define PIMV2_TYPE_JOIN_PRUNE 3
65 #define PIMV2_TYPE_BOOTSTRAP 4
66 #define PIMV2_TYPE_ASSERT 5
67 #define PIMV2_TYPE_GRAFT 6
68 #define PIMV2_TYPE_GRAFT_ACK 7
69 #define PIMV2_TYPE_CANDIDATE_RP 8
70 #define PIMV2_TYPE_PRUNE_REFRESH 9
71 #define PIMV2_TYPE_DF_ELECTION 10
72 #define PIMV2_TYPE_ECMP_REDIRECT 11
73
74 static const struct tok pimv2_type_values[] = {
75 { PIMV2_TYPE_HELLO, "Hello" },
76 { PIMV2_TYPE_REGISTER, "Register" },
77 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
78 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" },
79 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" },
80 { PIMV2_TYPE_ASSERT, "Assert" },
81 { PIMV2_TYPE_GRAFT, "Graft" },
82 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" },
83 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" },
84 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
85 { PIMV2_TYPE_DF_ELECTION, "DF Election" },
86 { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" },
87 { 0, NULL}
88 };
89
90 #define PIMV2_HELLO_OPTION_HOLDTIME 1
91 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2
92 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18
93 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19
94 #define PIMV2_HELLO_OPTION_GENID 20
95 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21
96 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22
97 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24
98 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
99
100 static const struct tok pimv2_hello_option_values[] = {
101 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" },
102 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" },
103 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" },
104 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" },
105 { PIMV2_HELLO_OPTION_GENID, "Generation ID" },
106 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" },
107 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" },
108 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" },
109 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
110 { 0, NULL}
111 };
112
113 #define PIMV2_REGISTER_FLAG_LEN 4
114 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000
115 #define PIMV2_REGISTER_FLAG_NULL 0x40000000
116
117 static const struct tok pimv2_register_flag_values[] = {
118 { PIMV2_REGISTER_FLAG_BORDER, "Border" },
119 { PIMV2_REGISTER_FLAG_NULL, "Null" },
120 { 0, NULL}
121 };
122
123 /*
124 * XXX: We consider a case where IPv6 is not ready yet for portability,
125 * but PIM dependent defintions should be independent of IPv6...
126 */
127
128 struct pim {
129 uint8_t pim_typever;
130 /* upper 4bit: PIM version number; 2 for PIMv2 */
131 /* lower 4bit: the PIM message type, currently they are:
132 * Hello, Register, Register-Stop, Join/Prune,
133 * Bootstrap, Assert, Graft (PIM-DM only),
134 * Graft-Ack (PIM-DM only), C-RP-Adv
135 */
136 #define PIM_VER(x) (((x) & 0xf0) >> 4)
137 #define PIM_TYPE(x) ((x) & 0x0f)
138 u_char pim_rsv; /* Reserved */
139 u_short pim_cksum; /* IP style check sum */
140 };
141
142 static void pimv2_print(netdissect_options *, register const u_char *bp, register u_int len, u_int cksum);
143
144 static void
145 pimv1_join_prune_print(netdissect_options *ndo,
146 register const u_char *bp, register u_int len)
147 {
148 int ngroups, njoin, nprune;
149 int njp;
150
151 /* If it's a single group and a single source, use 1-line output. */
152 if (ND_TTEST2(bp[0], 30) && bp[11] == 1 &&
153 ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
154 int hold;
155
156 ND_PRINT((ndo, " RPF %s ", ipaddr_string(ndo, bp)));
157 hold = EXTRACT_16BITS(&bp[6]);
158 if (hold != 180) {
159 ND_PRINT((ndo, "Hold "));
160 relts_print(ndo, hold);
161 }
162 ND_PRINT((ndo, "%s (%s/%d, %s", njoin ? "Join" : "Prune",
163 ipaddr_string(ndo, &bp[26]), bp[25] & 0x3f,
164 ipaddr_string(ndo, &bp[12])));
165 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
166 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[16])));
167 ND_PRINT((ndo, ") %s%s %s",
168 (bp[24] & 0x01) ? "Sparse" : "Dense",
169 (bp[25] & 0x80) ? " WC" : "",
170 (bp[25] & 0x40) ? "RP" : "SPT"));
171 return;
172 }
173
174 ND_TCHECK2(bp[0], sizeof(struct in_addr));
175 if (ndo->ndo_vflag > 1)
176 ND_PRINT((ndo, "\n"));
177 ND_PRINT((ndo, " Upstream Nbr: %s", ipaddr_string(ndo, bp)));
178 ND_TCHECK2(bp[6], 2);
179 if (ndo->ndo_vflag > 1)
180 ND_PRINT((ndo, "\n"));
181 ND_PRINT((ndo, " Hold time: "));
182 relts_print(ndo, EXTRACT_16BITS(&bp[6]));
183 if (ndo->ndo_vflag < 2)
184 return;
185 bp += 8;
186 len -= 8;
187
188 ND_TCHECK2(bp[0], 4);
189 ngroups = bp[3];
190 bp += 4;
191 len -= 4;
192 while (ngroups--) {
193 /*
194 * XXX - does the address have length "addrlen" and the
195 * mask length "maddrlen"?
196 */
197 ND_TCHECK2(bp[0], sizeof(struct in_addr));
198 ND_PRINT((ndo, "\n\tGroup: %s", ipaddr_string(ndo, bp)));
199 ND_TCHECK2(bp[4], sizeof(struct in_addr));
200 if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
201 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[4])));
202 ND_TCHECK2(bp[8], 4);
203 njoin = EXTRACT_16BITS(&bp[8]);
204 nprune = EXTRACT_16BITS(&bp[10]);
205 ND_PRINT((ndo, " joined: %d pruned: %d", njoin, nprune));
206 bp += 12;
207 len -= 12;
208 for (njp = 0; njp < (njoin + nprune); njp++) {
209 const char *type;
210
211 if (njp < njoin)
212 type = "Join ";
213 else
214 type = "Prune";
215 ND_TCHECK2(bp[0], 6);
216 ND_PRINT((ndo, "\n\t%s %s%s%s%s/%d", type,
217 (bp[0] & 0x01) ? "Sparse " : "Dense ",
218 (bp[1] & 0x80) ? "WC " : "",
219 (bp[1] & 0x40) ? "RP " : "SPT ",
220 ipaddr_string(ndo, &bp[2]), bp[1] & 0x3f));
221 bp += 6;
222 len -= 6;
223 }
224 }
225 return;
226 trunc:
227 ND_PRINT((ndo, "[|pim]"));
228 return;
229 }
230
231 void
232 pimv1_print(netdissect_options *ndo,
233 register const u_char *bp, register u_int len)
234 {
235 register const u_char *ep;
236 register u_char type;
237
238 ep = (const u_char *)ndo->ndo_snapend;
239 if (bp >= ep)
240 return;
241
242 ND_TCHECK(bp[1]);
243 type = bp[1];
244
245 ND_PRINT((ndo, " %s", tok2str(pimv1_type_str, "[type %u]", type)));
246 switch (type) {
247 case PIMV1_TYPE_QUERY:
248 if (ND_TTEST(bp[8])) {
249 switch (bp[8] >> 4) {
250 case 0:
251 ND_PRINT((ndo, " Dense-mode"));
252 break;
253 case 1:
254 ND_PRINT((ndo, " Sparse-mode"));
255 break;
256 case 2:
257 ND_PRINT((ndo, " Sparse-Dense-mode"));
258 break;
259 default:
260 ND_PRINT((ndo, " mode-%d", bp[8] >> 4));
261 break;
262 }
263 }
264 if (ndo->ndo_vflag) {
265 ND_TCHECK2(bp[10],2);
266 ND_PRINT((ndo, " (Hold-time "));
267 relts_print(ndo, EXTRACT_16BITS(&bp[10]));
268 ND_PRINT((ndo, ")"));
269 }
270 break;
271
272 case PIMV1_TYPE_REGISTER:
273 ND_TCHECK2(bp[8], 20); /* ip header */
274 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[20]),
275 ipaddr_string(ndo, &bp[24])));
276 break;
277 case PIMV1_TYPE_REGISTER_STOP:
278 ND_TCHECK2(bp[12], sizeof(struct in_addr));
279 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[8]),
280 ipaddr_string(ndo, &bp[12])));
281 break;
282 case PIMV1_TYPE_RP_REACHABILITY:
283 if (ndo->ndo_vflag) {
284 ND_TCHECK2(bp[22], 2);
285 ND_PRINT((ndo, " group %s", ipaddr_string(ndo, &bp[8])));
286 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
287 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12])));
288 ND_PRINT((ndo, " RP %s hold ", ipaddr_string(ndo, &bp[16])));
289 relts_print(ndo, EXTRACT_16BITS(&bp[22]));
290 }
291 break;
292 case PIMV1_TYPE_ASSERT:
293 ND_TCHECK2(bp[16], sizeof(struct in_addr));
294 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[16]),
295 ipaddr_string(ndo, &bp[8])));
296 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
297 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12])));
298 ND_TCHECK2(bp[24], 4);
299 ND_PRINT((ndo, " %s pref %d metric %d",
300 (bp[20] & 0x80) ? "RP-tree" : "SPT",
301 EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
302 EXTRACT_32BITS(&bp[24])));
303 break;
304 case PIMV1_TYPE_JOIN_PRUNE:
305 case PIMV1_TYPE_GRAFT:
306 case PIMV1_TYPE_GRAFT_ACK:
307 if (ndo->ndo_vflag)
308 pimv1_join_prune_print(ndo, &bp[8], len - 8);
309 break;
310 }
311 if ((bp[4] >> 4) != 1)
312 ND_PRINT((ndo, " [v%d]", bp[4] >> 4));
313 return;
314
315 trunc:
316 ND_PRINT((ndo, "[|pim]"));
317 return;
318 }
319
320 /*
321 * auto-RP is a cisco protocol, documented at
322 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
323 *
324 * This implements version 1+, dated Sept 9, 1998.
325 */
326 void
327 cisco_autorp_print(netdissect_options *ndo,
328 register const u_char *bp, register u_int len)
329 {
330 int type;
331 int numrps;
332 int hold;
333
334 ND_TCHECK(bp[0]);
335 ND_PRINT((ndo, " auto-rp "));
336 type = bp[0];
337 switch (type) {
338 case 0x11:
339 ND_PRINT((ndo, "candidate-advert"));
340 break;
341 case 0x12:
342 ND_PRINT((ndo, "mapping"));
343 break;
344 default:
345 ND_PRINT((ndo, "type-0x%02x", type));
346 break;
347 }
348
349 ND_TCHECK(bp[1]);
350 numrps = bp[1];
351
352 ND_TCHECK2(bp[2], 2);
353 ND_PRINT((ndo, " Hold "));
354 hold = EXTRACT_16BITS(&bp[2]);
355 if (hold)
356 relts_print(ndo, EXTRACT_16BITS(&bp[2]));
357 else
358 ND_PRINT((ndo, "FOREVER"));
359
360 /* Next 4 bytes are reserved. */
361
362 bp += 8; len -= 8;
363
364 /*XXX skip unless -v? */
365
366 /*
367 * Rest of packet:
368 * numrps entries of the form:
369 * 32 bits: RP
370 * 6 bits: reserved
371 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
372 * 8 bits: # of entries for this RP
373 * each entry: 7 bits: reserved, 1 bit: negative,
374 * 8 bits: mask 32 bits: source
375 * lather, rinse, repeat.
376 */
377 while (numrps--) {
378 int nentries;
379 char s;
380
381 ND_TCHECK2(bp[0], 4);
382 ND_PRINT((ndo, " RP %s", ipaddr_string(ndo, bp)));
383 ND_TCHECK(bp[4]);
384 switch (bp[4] & 0x3) {
385 case 0: ND_PRINT((ndo, " PIMv?"));
386 break;
387 case 1: ND_PRINT((ndo, " PIMv1"));
388 break;
389 case 2: ND_PRINT((ndo, " PIMv2"));
390 break;
391 case 3: ND_PRINT((ndo, " PIMv1+2"));
392 break;
393 }
394 if (bp[4] & 0xfc)
395 ND_PRINT((ndo, " [rsvd=0x%02x]", bp[4] & 0xfc));
396 ND_TCHECK(bp[5]);
397 nentries = bp[5];
398 bp += 6; len -= 6;
399 s = ' ';
400 for (; nentries; nentries--) {
401 ND_TCHECK2(bp[0], 6);
402 ND_PRINT((ndo, "%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
403 ipaddr_string(ndo, &bp[2]), bp[1]));
404 if (bp[0] & 0x02) {
405 ND_PRINT((ndo, " bidir"));
406 }
407 if (bp[0] & 0xfc) {
408 ND_PRINT((ndo, "[rsvd=0x%02x]", bp[0] & 0xfc));
409 }
410 s = ',';
411 bp += 6; len -= 6;
412 }
413 }
414 return;
415
416 trunc:
417 ND_PRINT((ndo, "[|autorp]"));
418 return;
419 }
420
421 void
422 pim_print(netdissect_options *ndo,
423 register const u_char *bp, register u_int len, u_int cksum)
424 {
425 register const u_char *ep;
426 register struct pim *pim = (struct pim *)bp;
427
428 ep = (const u_char *)ndo->ndo_snapend;
429 if (bp >= ep)
430 return;
431 #ifdef notyet /* currently we see only version and type */
432 ND_TCHECK(pim->pim_rsv);
433 #endif
434
435 switch (PIM_VER(pim->pim_typever)) {
436 case 2:
437 if (!ndo->ndo_vflag) {
438 ND_PRINT((ndo, "PIMv%u, %s, length %u",
439 PIM_VER(pim->pim_typever),
440 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
441 len));
442 return;
443 } else {
444 ND_PRINT((ndo, "PIMv%u, length %u\n\t%s",
445 PIM_VER(pim->pim_typever),
446 len,
447 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever))));
448 pimv2_print(ndo, bp, len, cksum);
449 }
450 break;
451 default:
452 ND_PRINT((ndo, "PIMv%u, length %u",
453 PIM_VER(pim->pim_typever),
454 len));
455 break;
456 }
457 return;
458 }
459
460 /*
461 * PIMv2 uses encoded address representations.
462 *
463 * The last PIM-SM I-D before RFC2117 was published specified the
464 * following representation for unicast addresses. However, RFC2117
465 * specified no encoding for unicast addresses with the unicast
466 * address length specified in the header. Therefore, we have to
467 * guess which encoding is being used (Cisco's PIMv2 implementation
468 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
469 * field into a 'unicast-address-length-in-bytes' field. We guess
470 * that it's the draft encoding if this reserved field is zero.
471 *
472 * RFC2362 goes back to the encoded format, and calls the addr length
473 * field "reserved" again.
474 *
475 * The first byte is the address family, from:
476 *
477 * 0 Reserved
478 * 1 IP (IP version 4)
479 * 2 IP6 (IP version 6)
480 * 3 NSAP
481 * 4 HDLC (8-bit multidrop)
482 * 5 BBN 1822
483 * 6 802 (includes all 802 media plus Ethernet "canonical format")
484 * 7 E.163
485 * 8 E.164 (SMDS, Frame Relay, ATM)
486 * 9 F.69 (Telex)
487 * 10 X.121 (X.25, Frame Relay)
488 * 11 IPX
489 * 12 Appletalk
490 * 13 Decnet IV
491 * 14 Banyan Vines
492 * 15 E.164 with NSAP format subaddress
493 *
494 * In addition, the second byte is an "Encoding". 0 is the default
495 * encoding for the address family, and no other encodings are currently
496 * specified.
497 *
498 */
499
500 static int pimv2_addr_len;
501
502 enum pimv2_addrtype {
503 pimv2_unicast, pimv2_group, pimv2_source
504 };
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 | Unicast Address |
510 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
511 * 0 1 2 3
512 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
513 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
514 * | Addr Family | Encoding Type | Reserved | Mask Len |
515 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
516 * | Group multicast Address |
517 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
518 * 0 1 2 3
519 * 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
520 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
521 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
522 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
523 * | Source Address |
524 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
525 */
526 static int
527 pimv2_addr_print(netdissect_options *ndo,
528 const u_char *bp, enum pimv2_addrtype at, int silent)
529 {
530 int af;
531 int len, hdrlen;
532
533 ND_TCHECK(bp[0]);
534
535 if (pimv2_addr_len == 0) {
536 ND_TCHECK(bp[1]);
537 switch (bp[0]) {
538 case 1:
539 af = AF_INET;
540 len = sizeof(struct in_addr);
541 break;
542 #ifdef INET6
543 case 2:
544 af = AF_INET6;
545 len = sizeof(struct in6_addr);
546 break;
547 #endif
548 default:
549 return -1;
550 }
551 if (bp[1] != 0)
552 return -1;
553 hdrlen = 2;
554 } else {
555 switch (pimv2_addr_len) {
556 case sizeof(struct in_addr):
557 af = AF_INET;
558 break;
559 #ifdef INET6
560 case sizeof(struct in6_addr):
561 af = AF_INET6;
562 break;
563 #endif
564 default:
565 return -1;
566 break;
567 }
568 len = pimv2_addr_len;
569 hdrlen = 0;
570 }
571
572 bp += hdrlen;
573 switch (at) {
574 case pimv2_unicast:
575 ND_TCHECK2(bp[0], len);
576 if (af == AF_INET) {
577 if (!silent)
578 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp)));
579 }
580 #ifdef INET6
581 else if (af == AF_INET6) {
582 if (!silent)
583 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp)));
584 }
585 #endif
586 return hdrlen + len;
587 case pimv2_group:
588 case pimv2_source:
589 ND_TCHECK2(bp[0], len + 2);
590 if (af == AF_INET) {
591 if (!silent) {
592 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp + 2)));
593 if (bp[1] != 32)
594 ND_PRINT((ndo, "/%u", bp[1]));
595 }
596 }
597 #ifdef INET6
598 else if (af == AF_INET6) {
599 if (!silent) {
600 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp + 2)));
601 if (bp[1] != 128)
602 ND_PRINT((ndo, "/%u", bp[1]));
603 }
604 }
605 #endif
606 if (bp[0] && !silent) {
607 if (at == pimv2_group) {
608 ND_PRINT((ndo, "(0x%02x)", bp[0]));
609 } else {
610 ND_PRINT((ndo, "(%s%s%s",
611 bp[0] & 0x04 ? "S" : "",
612 bp[0] & 0x02 ? "W" : "",
613 bp[0] & 0x01 ? "R" : ""));
614 if (bp[0] & 0xf8) {
615 ND_PRINT((ndo, "+0x%02x", bp[0] & 0xf8));
616 }
617 ND_PRINT((ndo, ")"));
618 }
619 }
620 return hdrlen + 2 + len;
621 default:
622 return -1;
623 }
624 trunc:
625 return -1;
626 }
627
628 static void
629 pimv2_print(netdissect_options *ndo,
630 register const u_char *bp, register u_int len, u_int cksum)
631 {
632 register const u_char *ep;
633 register struct pim *pim = (struct pim *)bp;
634 int advance;
635
636 ep = (const u_char *)ndo->ndo_snapend;
637 if (bp >= ep)
638 return;
639 if (ep > bp + len)
640 ep = bp + len;
641 ND_TCHECK(pim->pim_rsv);
642 pimv2_addr_len = pim->pim_rsv;
643 if (pimv2_addr_len != 0)
644 ND_PRINT((ndo, ", RFC2117-encoding"));
645
646 ND_PRINT((ndo, ", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum)));
647 if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
648 ND_PRINT((ndo, "(unverified)"));
649 } else {
650 ND_PRINT((ndo, "(%scorrect)", ND_TTEST2(bp[0], len) && cksum ? "in" : "" ));
651 }
652
653 switch (PIM_TYPE(pim->pim_typever)) {
654 case PIMV2_TYPE_HELLO:
655 {
656 uint16_t otype, olen;
657 bp += 4;
658 while (bp < ep) {
659 ND_TCHECK2(bp[0], 4);
660 otype = EXTRACT_16BITS(&bp[0]);
661 olen = EXTRACT_16BITS(&bp[2]);
662 ND_TCHECK2(bp[0], 4 + olen);
663 ND_PRINT((ndo, "\n\t %s Option (%u), length %u, Value: ",
664 tok2str(pimv2_hello_option_values, "Unknown", otype),
665 otype,
666 olen));
667 bp += 4;
668
669 switch (otype) {
670 case PIMV2_HELLO_OPTION_HOLDTIME:
671 relts_print(ndo, EXTRACT_16BITS(bp));
672 break;
673
674 case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
675 if (olen != 4) {
676 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
677 } else {
678 char t_bit;
679 uint16_t lan_delay, override_interval;
680 lan_delay = EXTRACT_16BITS(bp);
681 override_interval = EXTRACT_16BITS(bp+2);
682 t_bit = (lan_delay & 0x8000)? 1 : 0;
683 lan_delay &= ~0x8000;
684 ND_PRINT((ndo, "\n\t T-bit=%d, LAN delay %dms, Override interval %dms",
685 t_bit, lan_delay, override_interval));
686 }
687 break;
688
689 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
690 case PIMV2_HELLO_OPTION_DR_PRIORITY:
691 switch (olen) {
692 case 0:
693 ND_PRINT((ndo, "Bi-Directional Capability (Old)"));
694 break;
695 case 4:
696 ND_PRINT((ndo, "%u", EXTRACT_32BITS(bp)));
697 break;
698 default:
699 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
700 break;
701 }
702 break;
703
704 case PIMV2_HELLO_OPTION_GENID:
705 ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(bp)));
706 break;
707
708 case PIMV2_HELLO_OPTION_REFRESH_CAP:
709 ND_PRINT((ndo, "v%d", *bp));
710 if (*(bp+1) != 0) {
711 ND_PRINT((ndo, ", interval "));
712 relts_print(ndo, *(bp+1));
713 }
714 if (EXTRACT_16BITS(bp+2) != 0) {
715 ND_PRINT((ndo, " ?0x%04x?", EXTRACT_16BITS(bp+2)));
716 }
717 break;
718
719 case PIMV2_HELLO_OPTION_BIDIR_CAP:
720 break;
721
722 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
723 case PIMV2_HELLO_OPTION_ADDRESS_LIST:
724 if (ndo->ndo_vflag > 1) {
725 const u_char *ptr = bp;
726 while (ptr < (bp+olen)) {
727 int advance;
728
729 ND_PRINT((ndo, "\n\t "));
730 advance = pimv2_addr_print(ndo, ptr, pimv2_unicast, 0);
731 if (advance < 0) {
732 ND_PRINT((ndo, "..."));
733 break;
734 }
735 ptr += advance;
736 }
737 }
738 break;
739 default:
740 if (ndo->ndo_vflag <= 1)
741 print_unknown_data(ndo, bp, "\n\t ", olen);
742 break;
743 }
744 /* do we want to see an additionally hexdump ? */
745 if (ndo->ndo_vflag> 1)
746 print_unknown_data(ndo, bp, "\n\t ", olen);
747 bp += olen;
748 }
749 break;
750 }
751
752 case PIMV2_TYPE_REGISTER:
753 {
754 struct ip *ip;
755
756 ND_TCHECK2(*(bp + 4), PIMV2_REGISTER_FLAG_LEN);
757
758 ND_PRINT((ndo, ", Flags [ %s ]\n\t",
759 tok2str(pimv2_register_flag_values,
760 "none",
761 EXTRACT_32BITS(bp+4))));
762
763 bp += 8; len -= 8;
764 /* encapsulated multicast packet */
765 ip = (struct ip *)bp;
766 switch (IP_V(ip)) {
767 case 0: /* Null header */
768 ND_PRINT((ndo, "IP-Null-header %s > %s",
769 ipaddr_string(ndo, &ip->ip_src),
770 ipaddr_string(ndo, &ip->ip_dst)));
771 break;
772
773 case 4: /* IPv4 */
774 ip_print(ndo, bp, len);
775 break;
776
777 case 6: /* IPv6 */
778 ip6_print(ndo, bp, len);
779 break;
780
781 default:
782 ND_PRINT((ndo, "IP ver %d", IP_V(ip)));
783 break;
784 }
785 break;
786 }
787
788 case PIMV2_TYPE_REGISTER_STOP:
789 bp += 4; len -= 4;
790 if (bp >= ep)
791 break;
792 ND_PRINT((ndo, " group="));
793 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
794 ND_PRINT((ndo, "..."));
795 break;
796 }
797 bp += advance; len -= advance;
798 if (bp >= ep)
799 break;
800 ND_PRINT((ndo, " source="));
801 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
802 ND_PRINT((ndo, "..."));
803 break;
804 }
805 bp += advance; len -= advance;
806 break;
807
808 case PIMV2_TYPE_JOIN_PRUNE:
809 case PIMV2_TYPE_GRAFT:
810 case PIMV2_TYPE_GRAFT_ACK:
811
812
813 /*
814 * 0 1 2 3
815 * 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
816 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
817 * |PIM Ver| Type | Addr length | Checksum |
818 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
819 * | Unicast-Upstream Neighbor Address |
820 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
821 * | Reserved | Num groups | Holdtime |
822 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
823 * | Encoded-Multicast Group Address-1 |
824 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
825 * | Number of Joined Sources | Number of Pruned Sources |
826 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
827 * | Encoded-Joined Source Address-1 |
828 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
829 * | . |
830 * | . |
831 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
832 * | Encoded-Joined Source Address-n |
833 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
834 * | Encoded-Pruned Source Address-1 |
835 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
836 * | . |
837 * | . |
838 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
839 * | Encoded-Pruned Source Address-n |
840 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
841 * | . |
842 * | . |
843 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
844 * | Encoded-Multicast Group Address-n |
845 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
846 */
847
848 {
849 uint8_t ngroup;
850 uint16_t holdtime;
851 uint16_t njoin;
852 uint16_t nprune;
853 int i, j;
854
855 bp += 4; len -= 4;
856 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
857 if (bp >= ep)
858 break;
859 ND_PRINT((ndo, ", upstream-neighbor: "));
860 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
861 ND_PRINT((ndo, "..."));
862 break;
863 }
864 bp += advance; len -= advance;
865 }
866 if (bp + 4 > ep)
867 break;
868 ngroup = bp[1];
869 holdtime = EXTRACT_16BITS(&bp[2]);
870 ND_PRINT((ndo, "\n\t %u group(s)", ngroup));
871 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
872 ND_PRINT((ndo, ", holdtime: "));
873 if (holdtime == 0xffff)
874 ND_PRINT((ndo, "infinite"));
875 else
876 relts_print(ndo, holdtime);
877 }
878 bp += 4; len -= 4;
879 for (i = 0; i < ngroup; i++) {
880 if (bp >= ep)
881 goto jp_done;
882 ND_PRINT((ndo, "\n\t group #%u: ", i+1));
883 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
884 ND_PRINT((ndo, "...)"));
885 goto jp_done;
886 }
887 bp += advance; len -= advance;
888 if (bp + 4 > ep) {
889 ND_PRINT((ndo, "...)"));
890 goto jp_done;
891 }
892 njoin = EXTRACT_16BITS(&bp[0]);
893 nprune = EXTRACT_16BITS(&bp[2]);
894 ND_PRINT((ndo, ", joined sources: %u, pruned sources: %u", njoin, nprune));
895 bp += 4; len -= 4;
896 for (j = 0; j < njoin; j++) {
897 ND_PRINT((ndo, "\n\t joined source #%u: ", j+1));
898 if ((advance = pimv2_addr_print(ndo, bp, pimv2_source, 0)) < 0) {
899 ND_PRINT((ndo, "...)"));
900 goto jp_done;
901 }
902 bp += advance; len -= advance;
903 }
904 for (j = 0; j < nprune; j++) {
905 ND_PRINT((ndo, "\n\t pruned source #%u: ", j+1));
906 if ((advance = pimv2_addr_print(ndo, bp, pimv2_source, 0)) < 0) {
907 ND_PRINT((ndo, "...)"));
908 goto jp_done;
909 }
910 bp += advance; len -= advance;
911 }
912 }
913 jp_done:
914 break;
915 }
916
917 case PIMV2_TYPE_BOOTSTRAP:
918 {
919 int i, j, frpcnt;
920 bp += 4;
921
922 /* Fragment Tag, Hash Mask len, and BSR-priority */
923 if (bp + sizeof(uint16_t) >= ep) break;
924 ND_PRINT((ndo, " tag=%x", EXTRACT_16BITS(bp)));
925 bp += sizeof(uint16_t);
926 if (bp >= ep) break;
927 ND_PRINT((ndo, " hashmlen=%d", bp[0]));
928 if (bp + 1 >= ep) break;
929 ND_PRINT((ndo, " BSRprio=%d", bp[1]));
930 bp += 2;
931
932 /* Encoded-Unicast-BSR-Address */
933 if (bp >= ep) break;
934 ND_PRINT((ndo, " BSR="));
935 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
936 ND_PRINT((ndo, "..."));
937 break;
938 }
939 bp += advance;
940
941 for (i = 0; bp < ep; i++) {
942 /* Encoded-Group Address */
943 ND_PRINT((ndo, " (group%d: ", i));
944 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0))
945 < 0) {
946 ND_PRINT((ndo, "...)"));
947 goto bs_done;
948 }
949 bp += advance;
950
951 /* RP-Count, Frag RP-Cnt, and rsvd */
952 if (bp >= ep) {
953 ND_PRINT((ndo, "...)"));
954 goto bs_done;
955 }
956 ND_PRINT((ndo, " RPcnt=%d", bp[0]));
957 if (bp + 1 >= ep) {
958 ND_PRINT((ndo, "...)"));
959 goto bs_done;
960 }
961 ND_PRINT((ndo, " FRPcnt=%d", frpcnt = bp[1]));
962 bp += 4;
963
964 for (j = 0; j < frpcnt && bp < ep; j++) {
965 /* each RP info */
966 ND_PRINT((ndo, " RP%d=", j));
967 if ((advance = pimv2_addr_print(ndo, bp,
968 pimv2_unicast,
969 0)) < 0) {
970 ND_PRINT((ndo, "...)"));
971 goto bs_done;
972 }
973 bp += advance;
974
975 if (bp + 1 >= ep) {
976 ND_PRINT((ndo, "...)"));
977 goto bs_done;
978 }
979 ND_PRINT((ndo, ",holdtime="));
980 relts_print(ndo, EXTRACT_16BITS(bp));
981 if (bp + 2 >= ep) {
982 ND_PRINT((ndo, "...)"));
983 goto bs_done;
984 }
985 ND_PRINT((ndo, ",prio=%d", bp[2]));
986 bp += 4;
987 }
988 ND_PRINT((ndo, ")"));
989 }
990 bs_done:
991 break;
992 }
993 case PIMV2_TYPE_ASSERT:
994 bp += 4; len -= 4;
995 if (bp >= ep)
996 break;
997 ND_PRINT((ndo, " group="));
998 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
999 ND_PRINT((ndo, "..."));
1000 break;
1001 }
1002 bp += advance; len -= advance;
1003 if (bp >= ep)
1004 break;
1005 ND_PRINT((ndo, " src="));
1006 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1007 ND_PRINT((ndo, "..."));
1008 break;
1009 }
1010 bp += advance; len -= advance;
1011 if (bp + 8 > ep)
1012 break;
1013 if (bp[0] & 0x80)
1014 ND_PRINT((ndo, " RPT"));
1015 ND_PRINT((ndo, " pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff));
1016 ND_PRINT((ndo, " metric=%u", EXTRACT_32BITS(&bp[4])));
1017 break;
1018
1019 case PIMV2_TYPE_CANDIDATE_RP:
1020 {
1021 int i, pfxcnt;
1022 bp += 4;
1023
1024 /* Prefix-Cnt, Priority, and Holdtime */
1025 if (bp >= ep) break;
1026 ND_PRINT((ndo, " prefix-cnt=%d", bp[0]));
1027 pfxcnt = bp[0];
1028 if (bp + 1 >= ep) break;
1029 ND_PRINT((ndo, " prio=%d", bp[1]));
1030 if (bp + 3 >= ep) break;
1031 ND_PRINT((ndo, " holdtime="));
1032 relts_print(ndo, EXTRACT_16BITS(&bp[2]));
1033 bp += 4;
1034
1035 /* Encoded-Unicast-RP-Address */
1036 if (bp >= ep) break;
1037 ND_PRINT((ndo, " RP="));
1038 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1039 ND_PRINT((ndo, "..."));
1040 break;
1041 }
1042 bp += advance;
1043
1044 /* Encoded-Group Addresses */
1045 for (i = 0; i < pfxcnt && bp < ep; i++) {
1046 ND_PRINT((ndo, " Group%d=", i));
1047 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0))
1048 < 0) {
1049 ND_PRINT((ndo, "..."));
1050 break;
1051 }
1052 bp += advance;
1053 }
1054 break;
1055 }
1056
1057 case PIMV2_TYPE_PRUNE_REFRESH:
1058 ND_PRINT((ndo, " src="));
1059 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1060 ND_PRINT((ndo, "..."));
1061 break;
1062 }
1063 bp += advance;
1064 ND_PRINT((ndo, " grp="));
1065 if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
1066 ND_PRINT((ndo, "..."));
1067 break;
1068 }
1069 bp += advance;
1070 ND_PRINT((ndo, " forwarder="));
1071 if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
1072 ND_PRINT((ndo, "..."));
1073 break;
1074 }
1075 bp += advance;
1076 ND_TCHECK2(bp[0], 2);
1077 ND_PRINT((ndo, " TUNR "));
1078 relts_print(ndo, EXTRACT_16BITS(bp));
1079 break;
1080
1081
1082 default:
1083 ND_PRINT((ndo, " [type %d]", PIM_TYPE(pim->pim_typever)));
1084 break;
1085 }
1086
1087 return;
1088
1089 trunc:
1090 ND_PRINT((ndo, "[|pim]"));
1091 }
1092
1093 /*
1094 * Local Variables:
1095 * c-style: whitesmith
1096 * c-basic-offset: 8
1097 * End:
1098 */
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