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Add more nd_print_trunc() calls
[tcpdump] / print-pgm.c
1 /*
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that: (1) source code
4 * distributions retain the above copyright notice and this paragraph
5 * in its entirety, and (2) distributions including binary code include
6 * the above copyright notice and this paragraph in its entirety in
7 * the documentation or other materials provided with the distribution.
8 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
9 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
10 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11 * FOR A PARTICULAR PURPOSE.
12 *
13 * Original code by Andy Heffernan (ahh@juniper.net)
14 */
15
16 /* \summary: Pragmatic General Multicast (PGM) printer */
17
18 #ifdef HAVE_CONFIG_H
19 #include <config.h>
20 #endif
21
22 #include "netdissect-stdinc.h"
23
24 #include "netdissect.h"
25 #include "extract.h"
26 #include "addrtoname.h"
27 #include "addrtostr.h"
28
29 #include "ip.h"
30 #include "ip6.h"
31 #include "ipproto.h"
32 #include "af.h"
33
34 /*
35 * PGM header (RFC 3208)
36 */
37 struct pgm_header {
38 nd_uint16_t pgm_sport;
39 nd_uint16_t pgm_dport;
40 nd_uint8_t pgm_type;
41 nd_uint8_t pgm_options;
42 nd_uint16_t pgm_sum;
43 nd_byte pgm_gsid[6];
44 nd_uint16_t pgm_length;
45 };
46
47 struct pgm_spm {
48 nd_uint32_t pgms_seq;
49 nd_uint32_t pgms_trailseq;
50 nd_uint32_t pgms_leadseq;
51 nd_uint16_t pgms_nla_afi;
52 nd_uint16_t pgms_reserved;
53 /* ... uint8_t pgms_nla[0]; */
54 /* ... options */
55 };
56
57 struct pgm_nak {
58 nd_uint32_t pgmn_seq;
59 nd_uint16_t pgmn_source_afi;
60 nd_uint16_t pgmn_reserved;
61 /* ... uint8_t pgmn_source[0]; */
62 /* ... uint16_t pgmn_group_afi */
63 /* ... uint16_t pgmn_reserved2; */
64 /* ... uint8_t pgmn_group[0]; */
65 /* ... options */
66 };
67
68 struct pgm_ack {
69 nd_uint32_t pgma_rx_max_seq;
70 nd_uint32_t pgma_bitmap;
71 /* ... options */
72 };
73
74 struct pgm_poll {
75 nd_uint32_t pgmp_seq;
76 nd_uint16_t pgmp_round;
77 nd_uint16_t pgmp_reserved;
78 /* ... options */
79 };
80
81 struct pgm_polr {
82 nd_uint32_t pgmp_seq;
83 nd_uint16_t pgmp_round;
84 nd_uint16_t pgmp_subtype;
85 nd_uint16_t pgmp_nla_afi;
86 nd_uint16_t pgmp_reserved;
87 /* ... uint8_t pgmp_nla[0]; */
88 /* ... options */
89 };
90
91 struct pgm_data {
92 nd_uint32_t pgmd_seq;
93 nd_uint32_t pgmd_trailseq;
94 /* ... options */
95 };
96
97 typedef enum _pgm_type {
98 PGM_SPM = 0, /* source path message */
99 PGM_POLL = 1, /* POLL Request */
100 PGM_POLR = 2, /* POLL Response */
101 PGM_ODATA = 4, /* original data */
102 PGM_RDATA = 5, /* repair data */
103 PGM_NAK = 8, /* NAK */
104 PGM_NULLNAK = 9, /* Null NAK */
105 PGM_NCF = 10, /* NAK Confirmation */
106 PGM_ACK = 11, /* ACK for congestion control */
107 PGM_SPMR = 12, /* SPM request */
108 PGM_MAX = 255
109 } pgm_type;
110
111 #define PGM_OPT_BIT_PRESENT 0x01
112 #define PGM_OPT_BIT_NETWORK 0x02
113 #define PGM_OPT_BIT_VAR_PKTLEN 0x40
114 #define PGM_OPT_BIT_PARITY 0x80
115
116 #define PGM_OPT_LENGTH 0x00
117 #define PGM_OPT_FRAGMENT 0x01
118 #define PGM_OPT_NAK_LIST 0x02
119 #define PGM_OPT_JOIN 0x03
120 #define PGM_OPT_NAK_BO_IVL 0x04
121 #define PGM_OPT_NAK_BO_RNG 0x05
122
123 #define PGM_OPT_REDIRECT 0x07
124 #define PGM_OPT_PARITY_PRM 0x08
125 #define PGM_OPT_PARITY_GRP 0x09
126 #define PGM_OPT_CURR_TGSIZE 0x0A
127 #define PGM_OPT_NBR_UNREACH 0x0B
128 #define PGM_OPT_PATH_NLA 0x0C
129
130 #define PGM_OPT_SYN 0x0D
131 #define PGM_OPT_FIN 0x0E
132 #define PGM_OPT_RST 0x0F
133 #define PGM_OPT_CR 0x10
134 #define PGM_OPT_CRQST 0x11
135
136 #define PGM_OPT_PGMCC_DATA 0x12
137 #define PGM_OPT_PGMCC_FEEDBACK 0x13
138
139 #define PGM_OPT_MASK 0x7f
140
141 #define PGM_OPT_END 0x80 /* end of options marker */
142
143 #define PGM_MIN_OPT_LEN 4
144
145 void
146 pgm_print(netdissect_options *ndo,
147 const u_char *bp, u_int length,
148 const u_char *bp2)
149 {
150 const struct pgm_header *pgm;
151 const struct ip *ip;
152 uint8_t pgm_type_val;
153 uint16_t sport, dport;
154 u_int nla_afnum;
155 char nla_buf[INET6_ADDRSTRLEN];
156 const struct ip6_hdr *ip6;
157 uint8_t opt_type, opt_len;
158 uint32_t seq, opts_len, len, offset;
159
160 ndo->ndo_protocol = "pgm";
161 pgm = (const struct pgm_header *)bp;
162 ip = (const struct ip *)bp2;
163 if (IP_V(ip) == 6)
164 ip6 = (const struct ip6_hdr *)bp2;
165 else
166 ip6 = NULL;
167 if (!ND_TTEST_2(pgm->pgm_dport)) {
168 if (ip6) {
169 ND_PRINT("%s > %s:",
170 ip6addr_string(ndo, ip6->ip6_src),
171 ip6addr_string(ndo, ip6->ip6_dst));
172 } else {
173 ND_PRINT("%s > %s:",
174 ipaddr_string(ndo, ip->ip_src),
175 ipaddr_string(ndo, ip->ip_dst));
176 }
177 nd_print_trunc(ndo);
178 return;
179 }
180
181 sport = EXTRACT_BE_U_2(pgm->pgm_sport);
182 dport = EXTRACT_BE_U_2(pgm->pgm_dport);
183
184 if (ip6) {
185 if (EXTRACT_U_1(ip6->ip6_nxt) == IPPROTO_PGM) {
186 ND_PRINT("%s.%s > %s.%s: ",
187 ip6addr_string(ndo, ip6->ip6_src),
188 tcpport_string(ndo, sport),
189 ip6addr_string(ndo, ip6->ip6_dst),
190 tcpport_string(ndo, dport));
191 } else {
192 ND_PRINT("%s > %s: ",
193 tcpport_string(ndo, sport), tcpport_string(ndo, dport));
194 }
195 } else {
196 if (EXTRACT_U_1(ip->ip_p) == IPPROTO_PGM) {
197 ND_PRINT("%s.%s > %s.%s: ",
198 ipaddr_string(ndo, ip->ip_src),
199 tcpport_string(ndo, sport),
200 ipaddr_string(ndo, ip->ip_dst),
201 tcpport_string(ndo, dport));
202 } else {
203 ND_PRINT("%s > %s: ",
204 tcpport_string(ndo, sport), tcpport_string(ndo, dport));
205 }
206 }
207
208 ND_TCHECK_SIZE(pgm);
209
210 ND_PRINT("PGM, length %u", EXTRACT_BE_U_2(pgm->pgm_length));
211
212 if (!ndo->ndo_vflag)
213 return;
214
215 pgm_type_val = EXTRACT_U_1(pgm->pgm_type);
216 ND_PRINT(" 0x%02x%02x%02x%02x%02x%02x ",
217 pgm->pgm_gsid[0],
218 pgm->pgm_gsid[1],
219 pgm->pgm_gsid[2],
220 pgm->pgm_gsid[3],
221 pgm->pgm_gsid[4],
222 pgm->pgm_gsid[5]);
223 switch (pgm_type_val) {
224 case PGM_SPM: {
225 const struct pgm_spm *spm;
226
227 spm = (const struct pgm_spm *)(pgm + 1);
228 ND_TCHECK_SIZE(spm);
229 bp = (const u_char *) (spm + 1);
230
231 switch (EXTRACT_BE_U_2(spm->pgms_nla_afi)) {
232 case AFNUM_INET:
233 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
234 addrtostr(bp, nla_buf, sizeof(nla_buf));
235 bp += sizeof(nd_ipv4);
236 break;
237 case AFNUM_INET6:
238 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
239 addrtostr6(bp, nla_buf, sizeof(nla_buf));
240 bp += sizeof(nd_ipv6);
241 break;
242 default:
243 goto trunc;
244 break;
245 }
246
247 ND_PRINT("SPM seq %u trail %u lead %u nla %s",
248 EXTRACT_BE_U_4(spm->pgms_seq),
249 EXTRACT_BE_U_4(spm->pgms_trailseq),
250 EXTRACT_BE_U_4(spm->pgms_leadseq),
251 nla_buf);
252 break;
253 }
254
255 case PGM_POLL: {
256 const struct pgm_poll *poll_msg;
257
258 poll_msg = (const struct pgm_poll *)(pgm + 1);
259 ND_TCHECK_SIZE(poll_msg);
260 ND_PRINT("POLL seq %u round %u",
261 EXTRACT_BE_U_4(poll_msg->pgmp_seq),
262 EXTRACT_BE_U_2(poll_msg->pgmp_round));
263 bp = (const u_char *) (poll_msg + 1);
264 break;
265 }
266 case PGM_POLR: {
267 const struct pgm_polr *polr;
268 uint32_t ivl, rnd, mask;
269
270 polr = (const struct pgm_polr *)(pgm + 1);
271 ND_TCHECK_SIZE(polr);
272 bp = (const u_char *) (polr + 1);
273
274 switch (EXTRACT_BE_U_2(polr->pgmp_nla_afi)) {
275 case AFNUM_INET:
276 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
277 addrtostr(bp, nla_buf, sizeof(nla_buf));
278 bp += sizeof(nd_ipv4);
279 break;
280 case AFNUM_INET6:
281 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
282 addrtostr6(bp, nla_buf, sizeof(nla_buf));
283 bp += sizeof(nd_ipv6);
284 break;
285 default:
286 goto trunc;
287 break;
288 }
289
290 ND_TCHECK_LEN(bp, sizeof(uint32_t));
291 ivl = EXTRACT_BE_U_4(bp);
292 bp += sizeof(uint32_t);
293
294 ND_TCHECK_LEN(bp, sizeof(uint32_t));
295 rnd = EXTRACT_BE_U_4(bp);
296 bp += sizeof(uint32_t);
297
298 ND_TCHECK_LEN(bp, sizeof(uint32_t));
299 mask = EXTRACT_BE_U_4(bp);
300 bp += sizeof(uint32_t);
301
302 ND_PRINT("POLR seq %u round %u nla %s ivl %u rnd 0x%08x "
303 "mask 0x%08x", EXTRACT_BE_U_4(polr->pgmp_seq),
304 EXTRACT_BE_U_2(polr->pgmp_round), nla_buf, ivl, rnd, mask);
305 break;
306 }
307 case PGM_ODATA: {
308 const struct pgm_data *odata;
309
310 odata = (const struct pgm_data *)(pgm + 1);
311 ND_TCHECK_SIZE(odata);
312 ND_PRINT("ODATA trail %u seq %u",
313 EXTRACT_BE_U_4(odata->pgmd_trailseq),
314 EXTRACT_BE_U_4(odata->pgmd_seq));
315 bp = (const u_char *) (odata + 1);
316 break;
317 }
318
319 case PGM_RDATA: {
320 const struct pgm_data *rdata;
321
322 rdata = (const struct pgm_data *)(pgm + 1);
323 ND_TCHECK_SIZE(rdata);
324 ND_PRINT("RDATA trail %u seq %u",
325 EXTRACT_BE_U_4(rdata->pgmd_trailseq),
326 EXTRACT_BE_U_4(rdata->pgmd_seq));
327 bp = (const u_char *) (rdata + 1);
328 break;
329 }
330
331 case PGM_NAK:
332 case PGM_NULLNAK:
333 case PGM_NCF: {
334 const struct pgm_nak *nak;
335 char source_buf[INET6_ADDRSTRLEN], group_buf[INET6_ADDRSTRLEN];
336
337 nak = (const struct pgm_nak *)(pgm + 1);
338 ND_TCHECK_SIZE(nak);
339 bp = (const u_char *) (nak + 1);
340
341 /*
342 * Skip past the source, saving info along the way
343 * and stopping if we don't have enough.
344 */
345 switch (EXTRACT_BE_U_2(nak->pgmn_source_afi)) {
346 case AFNUM_INET:
347 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
348 addrtostr(bp, source_buf, sizeof(source_buf));
349 bp += sizeof(nd_ipv4);
350 break;
351 case AFNUM_INET6:
352 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
353 addrtostr6(bp, source_buf, sizeof(source_buf));
354 bp += sizeof(nd_ipv6);
355 break;
356 default:
357 goto trunc;
358 break;
359 }
360
361 /*
362 * Skip past the group, saving info along the way
363 * and stopping if we don't have enough.
364 */
365 bp += (2 * sizeof(uint16_t));
366 ND_TCHECK_2(bp);
367 switch (EXTRACT_BE_U_2(bp)) {
368 case AFNUM_INET:
369 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
370 addrtostr(bp, group_buf, sizeof(group_buf));
371 bp += sizeof(nd_ipv4);
372 break;
373 case AFNUM_INET6:
374 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
375 addrtostr6(bp, group_buf, sizeof(group_buf));
376 bp += sizeof(nd_ipv6);
377 break;
378 default:
379 goto trunc;
380 break;
381 }
382
383 /*
384 * Options decoding can go here.
385 */
386 switch (pgm_type_val) {
387 case PGM_NAK:
388 ND_PRINT("NAK ");
389 break;
390 case PGM_NULLNAK:
391 ND_PRINT("NNAK ");
392 break;
393 case PGM_NCF:
394 ND_PRINT("NCF ");
395 break;
396 default:
397 break;
398 }
399 ND_PRINT("(%s -> %s), seq %u",
400 source_buf, group_buf, EXTRACT_BE_U_4(nak->pgmn_seq));
401 break;
402 }
403
404 case PGM_ACK: {
405 const struct pgm_ack *ack;
406
407 ack = (const struct pgm_ack *)(pgm + 1);
408 ND_TCHECK_SIZE(ack);
409 ND_PRINT("ACK seq %u",
410 EXTRACT_BE_U_4(ack->pgma_rx_max_seq));
411 bp = (const u_char *) (ack + 1);
412 break;
413 }
414
415 case PGM_SPMR:
416 ND_PRINT("SPMR");
417 break;
418
419 default:
420 ND_PRINT("UNKNOWN type 0x%02x", pgm_type_val);
421 break;
422
423 }
424 if (EXTRACT_U_1(pgm->pgm_options) & PGM_OPT_BIT_PRESENT) {
425
426 /*
427 * make sure there's enough for the first option header
428 */
429 if (!ND_TTEST_LEN(bp, PGM_MIN_OPT_LEN)) {
430 nd_print_trunc(ndo);
431 return;
432 }
433
434 /*
435 * That option header MUST be an OPT_LENGTH option
436 * (see the first paragraph of section 9.1 in RFC 3208).
437 */
438 opt_type = EXTRACT_U_1(bp);
439 bp++;
440 if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) {
441 ND_PRINT("[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK);
442 return;
443 }
444 opt_len = EXTRACT_U_1(bp);
445 bp++;
446 if (opt_len != 4) {
447 ND_PRINT("[Bad OPT_LENGTH option, length %u != 4]", opt_len);
448 return;
449 }
450 opts_len = EXTRACT_BE_U_2(bp);
451 bp += sizeof(uint16_t);
452 if (opts_len < 4) {
453 ND_PRINT("[Bad total option length %u < 4]", opts_len);
454 return;
455 }
456 ND_PRINT(" OPTS LEN %u", opts_len);
457 opts_len -= 4;
458
459 while (opts_len) {
460 if (opts_len < PGM_MIN_OPT_LEN) {
461 ND_PRINT("[Total option length leaves no room for final option]");
462 return;
463 }
464 if (!ND_TTEST_2(bp)) {
465 nd_print_trunc(ndo);
466 return;
467 }
468 opt_type = EXTRACT_U_1(bp);
469 bp++;
470 opt_len = EXTRACT_U_1(bp);
471 bp++;
472 if (opt_len < PGM_MIN_OPT_LEN) {
473 ND_PRINT("[Bad option, length %u < %u]", opt_len,
474 PGM_MIN_OPT_LEN);
475 break;
476 }
477 if (opts_len < opt_len) {
478 ND_PRINT("[Total option length leaves no room for final option]");
479 return;
480 }
481 if (!ND_TTEST_LEN(bp, opt_len - 2)) {
482 nd_print_trunc(ndo);
483 return;
484 }
485
486 switch (opt_type & PGM_OPT_MASK) {
487 case PGM_OPT_LENGTH:
488 #define PGM_OPT_LENGTH_LEN (2+2)
489 if (opt_len != PGM_OPT_LENGTH_LEN) {
490 ND_PRINT("[Bad OPT_LENGTH option, length %u != %u]",
491 opt_len, PGM_OPT_LENGTH_LEN);
492 return;
493 }
494 ND_PRINT(" OPTS LEN (extra?) %u", EXTRACT_BE_U_2(bp));
495 bp += 2;
496 opts_len -= PGM_OPT_LENGTH_LEN;
497 break;
498
499 case PGM_OPT_FRAGMENT:
500 #define PGM_OPT_FRAGMENT_LEN (2+2+4+4+4)
501 if (opt_len != PGM_OPT_FRAGMENT_LEN) {
502 ND_PRINT("[Bad OPT_FRAGMENT option, length %u != %u]",
503 opt_len, PGM_OPT_FRAGMENT_LEN);
504 return;
505 }
506 bp += 2;
507 seq = EXTRACT_BE_U_4(bp);
508 bp += 4;
509 offset = EXTRACT_BE_U_4(bp);
510 bp += 4;
511 len = EXTRACT_BE_U_4(bp);
512 bp += 4;
513 ND_PRINT(" FRAG seq %u off %u len %u", seq, offset, len);
514 opts_len -= PGM_OPT_FRAGMENT_LEN;
515 break;
516
517 case PGM_OPT_NAK_LIST:
518 bp += 2;
519 opt_len -= 4; /* option header */
520 ND_PRINT(" NAK LIST");
521 while (opt_len) {
522 if (opt_len < 4) {
523 ND_PRINT("[Option length not a multiple of 4]");
524 return;
525 }
526 ND_TCHECK_4(bp);
527 ND_PRINT(" %u", EXTRACT_BE_U_4(bp));
528 bp += 4;
529 opt_len -= 4;
530 opts_len -= 4;
531 }
532 break;
533
534 case PGM_OPT_JOIN:
535 #define PGM_OPT_JOIN_LEN (2+2+4)
536 if (opt_len != PGM_OPT_JOIN_LEN) {
537 ND_PRINT("[Bad OPT_JOIN option, length %u != %u]",
538 opt_len, PGM_OPT_JOIN_LEN);
539 return;
540 }
541 bp += 2;
542 seq = EXTRACT_BE_U_4(bp);
543 bp += 4;
544 ND_PRINT(" JOIN %u", seq);
545 opts_len -= PGM_OPT_JOIN_LEN;
546 break;
547
548 case PGM_OPT_NAK_BO_IVL:
549 #define PGM_OPT_NAK_BO_IVL_LEN (2+2+4+4)
550 if (opt_len != PGM_OPT_NAK_BO_IVL_LEN) {
551 ND_PRINT("[Bad OPT_NAK_BO_IVL option, length %u != %u]",
552 opt_len, PGM_OPT_NAK_BO_IVL_LEN);
553 return;
554 }
555 bp += 2;
556 offset = EXTRACT_BE_U_4(bp);
557 bp += 4;
558 seq = EXTRACT_BE_U_4(bp);
559 bp += 4;
560 ND_PRINT(" BACKOFF ivl %u ivlseq %u", offset, seq);
561 opts_len -= PGM_OPT_NAK_BO_IVL_LEN;
562 break;
563
564 case PGM_OPT_NAK_BO_RNG:
565 #define PGM_OPT_NAK_BO_RNG_LEN (2+2+4+4)
566 if (opt_len != PGM_OPT_NAK_BO_RNG_LEN) {
567 ND_PRINT("[Bad OPT_NAK_BO_RNG option, length %u != %u]",
568 opt_len, PGM_OPT_NAK_BO_RNG_LEN);
569 return;
570 }
571 bp += 2;
572 offset = EXTRACT_BE_U_4(bp);
573 bp += 4;
574 seq = EXTRACT_BE_U_4(bp);
575 bp += 4;
576 ND_PRINT(" BACKOFF max %u min %u", offset, seq);
577 opts_len -= PGM_OPT_NAK_BO_RNG_LEN;
578 break;
579
580 case PGM_OPT_REDIRECT:
581 #define PGM_OPT_REDIRECT_FIXED_LEN (2+2+2+2)
582 if (opt_len < PGM_OPT_REDIRECT_FIXED_LEN) {
583 ND_PRINT("[Bad OPT_REDIRECT option, length %u < %u]",
584 opt_len, PGM_OPT_REDIRECT_FIXED_LEN);
585 return;
586 }
587 bp += 2;
588 nla_afnum = EXTRACT_BE_U_2(bp);
589 bp += 2+2;
590 switch (nla_afnum) {
591 case AFNUM_INET:
592 if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv4)) {
593 ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]",
594 opt_len, PGM_OPT_REDIRECT_FIXED_LEN);
595 return;
596 }
597 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
598 addrtostr(bp, nla_buf, sizeof(nla_buf));
599 bp += sizeof(nd_ipv4);
600 opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv4);
601 break;
602 case AFNUM_INET6:
603 if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6)) {
604 ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]",
605 PGM_OPT_REDIRECT_FIXED_LEN, opt_len);
606 return;
607 }
608 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
609 addrtostr6(bp, nla_buf, sizeof(nla_buf));
610 bp += sizeof(nd_ipv6);
611 opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6);
612 break;
613 default:
614 goto trunc;
615 break;
616 }
617
618 ND_PRINT(" REDIRECT %s", nla_buf);
619 break;
620
621 case PGM_OPT_PARITY_PRM:
622 #define PGM_OPT_PARITY_PRM_LEN (2+2+4)
623 if (opt_len != PGM_OPT_PARITY_PRM_LEN) {
624 ND_PRINT("[Bad OPT_PARITY_PRM option, length %u != %u]",
625 opt_len, PGM_OPT_PARITY_PRM_LEN);
626 return;
627 }
628 bp += 2;
629 len = EXTRACT_BE_U_4(bp);
630 bp += 4;
631 ND_PRINT(" PARITY MAXTGS %u", len);
632 opts_len -= PGM_OPT_PARITY_PRM_LEN;
633 break;
634
635 case PGM_OPT_PARITY_GRP:
636 #define PGM_OPT_PARITY_GRP_LEN (2+2+4)
637 if (opt_len != PGM_OPT_PARITY_GRP_LEN) {
638 ND_PRINT("[Bad OPT_PARITY_GRP option, length %u != %u]",
639 opt_len, PGM_OPT_PARITY_GRP_LEN);
640 return;
641 }
642 bp += 2;
643 seq = EXTRACT_BE_U_4(bp);
644 bp += 4;
645 ND_PRINT(" PARITY GROUP %u", seq);
646 opts_len -= PGM_OPT_PARITY_GRP_LEN;
647 break;
648
649 case PGM_OPT_CURR_TGSIZE:
650 #define PGM_OPT_CURR_TGSIZE_LEN (2+2+4)
651 if (opt_len != PGM_OPT_CURR_TGSIZE_LEN) {
652 ND_PRINT("[Bad OPT_CURR_TGSIZE option, length %u != %u]",
653 opt_len, PGM_OPT_CURR_TGSIZE_LEN);
654 return;
655 }
656 bp += 2;
657 len = EXTRACT_BE_U_4(bp);
658 bp += 4;
659 ND_PRINT(" PARITY ATGS %u", len);
660 opts_len -= PGM_OPT_CURR_TGSIZE_LEN;
661 break;
662
663 case PGM_OPT_NBR_UNREACH:
664 #define PGM_OPT_NBR_UNREACH_LEN (2+2)
665 if (opt_len != PGM_OPT_NBR_UNREACH_LEN) {
666 ND_PRINT("[Bad OPT_NBR_UNREACH option, length %u != %u]",
667 opt_len, PGM_OPT_NBR_UNREACH_LEN);
668 return;
669 }
670 bp += 2;
671 ND_PRINT(" NBR_UNREACH");
672 opts_len -= PGM_OPT_NBR_UNREACH_LEN;
673 break;
674
675 case PGM_OPT_PATH_NLA:
676 ND_PRINT(" PATH_NLA [%u]", opt_len);
677 bp += opt_len;
678 opts_len -= opt_len;
679 break;
680
681 case PGM_OPT_SYN:
682 #define PGM_OPT_SYN_LEN (2+2)
683 if (opt_len != PGM_OPT_SYN_LEN) {
684 ND_PRINT("[Bad OPT_SYN option, length %u != %u]",
685 opt_len, PGM_OPT_SYN_LEN);
686 return;
687 }
688 bp += 2;
689 ND_PRINT(" SYN");
690 opts_len -= PGM_OPT_SYN_LEN;
691 break;
692
693 case PGM_OPT_FIN:
694 #define PGM_OPT_FIN_LEN (2+2)
695 if (opt_len != PGM_OPT_FIN_LEN) {
696 ND_PRINT("[Bad OPT_FIN option, length %u != %u]",
697 opt_len, PGM_OPT_FIN_LEN);
698 return;
699 }
700 bp += 2;
701 ND_PRINT(" FIN");
702 opts_len -= PGM_OPT_FIN_LEN;
703 break;
704
705 case PGM_OPT_RST:
706 #define PGM_OPT_RST_LEN (2+2)
707 if (opt_len != PGM_OPT_RST_LEN) {
708 ND_PRINT("[Bad OPT_RST option, length %u != %u]",
709 opt_len, PGM_OPT_RST_LEN);
710 return;
711 }
712 bp += 2;
713 ND_PRINT(" RST");
714 opts_len -= PGM_OPT_RST_LEN;
715 break;
716
717 case PGM_OPT_CR:
718 ND_PRINT(" CR");
719 bp += opt_len;
720 opts_len -= opt_len;
721 break;
722
723 case PGM_OPT_CRQST:
724 #define PGM_OPT_CRQST_LEN (2+2)
725 if (opt_len != PGM_OPT_CRQST_LEN) {
726 ND_PRINT("[Bad OPT_CRQST option, length %u != %u]",
727 opt_len, PGM_OPT_CRQST_LEN);
728 return;
729 }
730 bp += 2;
731 ND_PRINT(" CRQST");
732 opts_len -= PGM_OPT_CRQST_LEN;
733 break;
734
735 case PGM_OPT_PGMCC_DATA:
736 #define PGM_OPT_PGMCC_DATA_FIXED_LEN (2+2+4+2+2)
737 if (opt_len < PGM_OPT_PGMCC_DATA_FIXED_LEN) {
738 ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u < %u]",
739 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN);
740 return;
741 }
742 bp += 2;
743 offset = EXTRACT_BE_U_4(bp);
744 bp += 4;
745 nla_afnum = EXTRACT_BE_U_2(bp);
746 bp += 2+2;
747 switch (nla_afnum) {
748 case AFNUM_INET:
749 if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv4)) {
750 ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
751 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN);
752 return;
753 }
754 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
755 addrtostr(bp, nla_buf, sizeof(nla_buf));
756 bp += sizeof(nd_ipv4);
757 opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv4);
758 break;
759 case AFNUM_INET6:
760 if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv6)) {
761 ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
762 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN);
763 return;
764 }
765 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
766 addrtostr6(bp, nla_buf, sizeof(nla_buf));
767 bp += sizeof(nd_ipv6);
768 opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv6);
769 break;
770 default:
771 goto trunc;
772 break;
773 }
774
775 ND_PRINT(" PGMCC DATA %u %s", offset, nla_buf);
776 break;
777
778 case PGM_OPT_PGMCC_FEEDBACK:
779 #define PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN (2+2+4+2+2)
780 if (opt_len < PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN) {
781 ND_PRINT("[Bad PGM_OPT_PGMCC_FEEDBACK option, length %u < %u]",
782 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN);
783 return;
784 }
785 bp += 2;
786 offset = EXTRACT_BE_U_4(bp);
787 bp += 4;
788 nla_afnum = EXTRACT_BE_U_2(bp);
789 bp += 2+2;
790 switch (nla_afnum) {
791 case AFNUM_INET:
792 if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv4)) {
793 ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
794 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN);
795 return;
796 }
797 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
798 addrtostr(bp, nla_buf, sizeof(nla_buf));
799 bp += sizeof(nd_ipv4);
800 opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv4);
801 break;
802 case AFNUM_INET6:
803 if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv6)) {
804 ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
805 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN);
806 return;
807 }
808 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
809 addrtostr6(bp, nla_buf, sizeof(nla_buf));
810 bp += sizeof(nd_ipv6);
811 opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv6);
812 break;
813 default:
814 goto trunc;
815 break;
816 }
817
818 ND_PRINT(" PGMCC FEEDBACK %u %s", offset, nla_buf);
819 break;
820
821 default:
822 ND_PRINT(" OPT_%02X [%u] ", opt_type, opt_len);
823 bp += opt_len;
824 opts_len -= opt_len;
825 break;
826 }
827
828 if (opt_type & PGM_OPT_END)
829 break;
830 }
831 }
832
833 ND_PRINT(" [%u]", length);
834 if (ndo->ndo_packettype == PT_PGM_ZMTP1 &&
835 (pgm_type_val == PGM_ODATA || pgm_type_val == PGM_RDATA))
836 zmtp1_datagram_print(ndo, bp,
837 EXTRACT_BE_U_2(pgm->pgm_length));
838
839 return;
840
841 trunc:
842 nd_print_trunc(ndo);
843 }
[mirror] the TCPdump network dissector