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PGM: Remove 3 now redundant ND_TCHECK_LEN(e, sizeof(uint32_t)) 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_subtype;
78 nd_uint16_t pgmp_nla_afi;
79 nd_uint16_t pgmp_reserved;
80 /* ... uint8_t pgmp_nla[0]; */
81 /* ... options */
82 };
83
84 struct pgm_polr {
85 nd_uint32_t pgmp_seq;
86 nd_uint16_t pgmp_round;
87 nd_uint16_t pgmp_reserved;
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 GET_IP6ADDR_STRING(ip6->ip6_src),
171 GET_IP6ADDR_STRING(ip6->ip6_dst));
172 } else {
173 ND_PRINT("%s > %s:",
174 GET_IPADDR_STRING(ip->ip_src),
175 GET_IPADDR_STRING(ip->ip_dst));
176 }
177 nd_print_trunc(ndo);
178 return;
179 }
180
181 sport = GET_BE_U_2(pgm->pgm_sport);
182 dport = GET_BE_U_2(pgm->pgm_dport);
183
184 if (ip6) {
185 if (GET_U_1(ip6->ip6_nxt) == IPPROTO_PGM) {
186 ND_PRINT("%s.%s > %s.%s: ",
187 GET_IP6ADDR_STRING(ip6->ip6_src),
188 tcpport_string(ndo, sport),
189 GET_IP6ADDR_STRING(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 (GET_U_1(ip->ip_p) == IPPROTO_PGM) {
197 ND_PRINT("%s.%s > %s.%s: ",
198 GET_IPADDR_STRING(ip->ip_src),
199 tcpport_string(ndo, sport),
200 GET_IPADDR_STRING(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", GET_BE_U_2(pgm->pgm_length));
211
212 if (!ndo->ndo_vflag)
213 return;
214
215 pgm_type_val = GET_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 (GET_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 GET_BE_U_4(spm->pgms_seq),
249 GET_BE_U_4(spm->pgms_trailseq),
250 GET_BE_U_4(spm->pgms_leadseq),
251 nla_buf);
252 break;
253 }
254
255 case PGM_POLL: {
256 const struct pgm_poll *pgm_poll;
257 uint32_t ivl, rnd, mask;
258
259 pgm_poll = (const struct pgm_poll *)(pgm + 1);
260 ND_TCHECK_SIZE(pgm_poll);
261 bp = (const u_char *) (pgm_poll + 1);
262
263 switch (GET_BE_U_2(pgm_poll->pgmp_nla_afi)) {
264 case AFNUM_INET:
265 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
266 addrtostr(bp, nla_buf, sizeof(nla_buf));
267 bp += sizeof(nd_ipv4);
268 break;
269 case AFNUM_INET6:
270 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
271 addrtostr6(bp, nla_buf, sizeof(nla_buf));
272 bp += sizeof(nd_ipv6);
273 break;
274 default:
275 goto trunc;
276 break;
277 }
278
279 ivl = GET_BE_U_4(bp);
280 bp += sizeof(uint32_t);
281
282 rnd = GET_BE_U_4(bp);
283 bp += sizeof(uint32_t);
284
285 mask = GET_BE_U_4(bp);
286 bp += sizeof(uint32_t);
287
288 ND_PRINT("POLL seq %u round %u nla %s ivl %u rnd 0x%08x "
289 "mask 0x%08x", GET_BE_U_4(pgm_poll->pgmp_seq),
290 GET_BE_U_2(pgm_poll->pgmp_round), nla_buf, ivl, rnd,
291 mask);
292 break;
293 }
294 case PGM_POLR: {
295 const struct pgm_polr *polr_msg;
296
297 polr_msg = (const struct pgm_polr *)(pgm + 1);
298 ND_TCHECK_SIZE(polr_msg);
299 ND_PRINT("POLR seq %u round %u",
300 GET_BE_U_4(polr_msg->pgmp_seq),
301 GET_BE_U_2(polr_msg->pgmp_round));
302 bp = (const u_char *) (polr_msg + 1);
303 break;
304 }
305 case PGM_ODATA: {
306 const struct pgm_data *odata;
307
308 odata = (const struct pgm_data *)(pgm + 1);
309 ND_TCHECK_SIZE(odata);
310 ND_PRINT("ODATA trail %u seq %u",
311 GET_BE_U_4(odata->pgmd_trailseq),
312 GET_BE_U_4(odata->pgmd_seq));
313 bp = (const u_char *) (odata + 1);
314 break;
315 }
316
317 case PGM_RDATA: {
318 const struct pgm_data *rdata;
319
320 rdata = (const struct pgm_data *)(pgm + 1);
321 ND_TCHECK_SIZE(rdata);
322 ND_PRINT("RDATA trail %u seq %u",
323 GET_BE_U_4(rdata->pgmd_trailseq),
324 GET_BE_U_4(rdata->pgmd_seq));
325 bp = (const u_char *) (rdata + 1);
326 break;
327 }
328
329 case PGM_NAK:
330 case PGM_NULLNAK:
331 case PGM_NCF: {
332 const struct pgm_nak *nak;
333 char source_buf[INET6_ADDRSTRLEN], group_buf[INET6_ADDRSTRLEN];
334
335 nak = (const struct pgm_nak *)(pgm + 1);
336 ND_TCHECK_SIZE(nak);
337 bp = (const u_char *) (nak + 1);
338
339 /*
340 * Skip past the source, saving info along the way
341 * and stopping if we don't have enough.
342 */
343 switch (GET_BE_U_2(nak->pgmn_source_afi)) {
344 case AFNUM_INET:
345 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
346 addrtostr(bp, source_buf, sizeof(source_buf));
347 bp += sizeof(nd_ipv4);
348 break;
349 case AFNUM_INET6:
350 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
351 addrtostr6(bp, source_buf, sizeof(source_buf));
352 bp += sizeof(nd_ipv6);
353 break;
354 default:
355 goto trunc;
356 break;
357 }
358
359 /*
360 * Skip past the group, saving info along the way
361 * and stopping if we don't have enough.
362 */
363 bp += (2 * sizeof(uint16_t));
364 switch (GET_BE_U_2(bp)) {
365 case AFNUM_INET:
366 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
367 addrtostr(bp, group_buf, sizeof(group_buf));
368 bp += sizeof(nd_ipv4);
369 break;
370 case AFNUM_INET6:
371 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
372 addrtostr6(bp, group_buf, sizeof(group_buf));
373 bp += sizeof(nd_ipv6);
374 break;
375 default:
376 goto trunc;
377 break;
378 }
379
380 /*
381 * Options decoding can go here.
382 */
383 switch (pgm_type_val) {
384 case PGM_NAK:
385 ND_PRINT("NAK ");
386 break;
387 case PGM_NULLNAK:
388 ND_PRINT("NNAK ");
389 break;
390 case PGM_NCF:
391 ND_PRINT("NCF ");
392 break;
393 default:
394 break;
395 }
396 ND_PRINT("(%s -> %s), seq %u",
397 source_buf, group_buf, GET_BE_U_4(nak->pgmn_seq));
398 break;
399 }
400
401 case PGM_ACK: {
402 const struct pgm_ack *ack;
403
404 ack = (const struct pgm_ack *)(pgm + 1);
405 ND_TCHECK_SIZE(ack);
406 ND_PRINT("ACK seq %u",
407 GET_BE_U_4(ack->pgma_rx_max_seq));
408 bp = (const u_char *) (ack + 1);
409 break;
410 }
411
412 case PGM_SPMR:
413 ND_PRINT("SPMR");
414 break;
415
416 default:
417 ND_PRINT("UNKNOWN type 0x%02x", pgm_type_val);
418 break;
419
420 }
421 if (GET_U_1(pgm->pgm_options) & PGM_OPT_BIT_PRESENT) {
422
423 /*
424 * make sure there's enough for the first option header
425 */
426 ND_TCHECK_LEN(bp, PGM_MIN_OPT_LEN);
427
428 /*
429 * That option header MUST be an OPT_LENGTH option
430 * (see the first paragraph of section 9.1 in RFC 3208).
431 */
432 opt_type = GET_U_1(bp);
433 bp++;
434 if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) {
435 ND_PRINT("[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK);
436 return;
437 }
438 opt_len = GET_U_1(bp);
439 bp++;
440 if (opt_len != 4) {
441 ND_PRINT("[Bad OPT_LENGTH option, length %u != 4]", opt_len);
442 return;
443 }
444 opts_len = GET_BE_U_2(bp);
445 bp += sizeof(uint16_t);
446 if (opts_len < 4) {
447 ND_PRINT("[Bad total option length %u < 4]", opts_len);
448 return;
449 }
450 ND_PRINT(" OPTS LEN %u", opts_len);
451 opts_len -= 4;
452
453 while (opts_len) {
454 if (opts_len < PGM_MIN_OPT_LEN) {
455 ND_PRINT("[Total option length leaves no room for final option]");
456 return;
457 }
458 opt_type = GET_U_1(bp);
459 bp++;
460 opt_len = GET_U_1(bp);
461 bp++;
462 if (opt_len < PGM_MIN_OPT_LEN) {
463 ND_PRINT("[Bad option, length %u < %u]", opt_len,
464 PGM_MIN_OPT_LEN);
465 break;
466 }
467 if (opts_len < opt_len) {
468 ND_PRINT("[Total option length leaves no room for final option]");
469 return;
470 }
471 ND_TCHECK_LEN(bp, opt_len - 2);
472
473 switch (opt_type & PGM_OPT_MASK) {
474 case PGM_OPT_LENGTH:
475 #define PGM_OPT_LENGTH_LEN (2+2)
476 if (opt_len != PGM_OPT_LENGTH_LEN) {
477 ND_PRINT("[Bad OPT_LENGTH option, length %u != %u]",
478 opt_len, PGM_OPT_LENGTH_LEN);
479 return;
480 }
481 ND_PRINT(" OPTS LEN (extra?) %u", GET_BE_U_2(bp));
482 bp += 2;
483 opts_len -= PGM_OPT_LENGTH_LEN;
484 break;
485
486 case PGM_OPT_FRAGMENT:
487 #define PGM_OPT_FRAGMENT_LEN (2+2+4+4+4)
488 if (opt_len != PGM_OPT_FRAGMENT_LEN) {
489 ND_PRINT("[Bad OPT_FRAGMENT option, length %u != %u]",
490 opt_len, PGM_OPT_FRAGMENT_LEN);
491 return;
492 }
493 bp += 2;
494 seq = GET_BE_U_4(bp);
495 bp += 4;
496 offset = GET_BE_U_4(bp);
497 bp += 4;
498 len = GET_BE_U_4(bp);
499 bp += 4;
500 ND_PRINT(" FRAG seq %u off %u len %u", seq, offset, len);
501 opts_len -= PGM_OPT_FRAGMENT_LEN;
502 break;
503
504 case PGM_OPT_NAK_LIST:
505 bp += 2;
506 opt_len -= 4; /* option header */
507 ND_PRINT(" NAK LIST");
508 while (opt_len) {
509 if (opt_len < 4) {
510 ND_PRINT("[Option length not a multiple of 4]");
511 return;
512 }
513 ND_PRINT(" %u", GET_BE_U_4(bp));
514 bp += 4;
515 opt_len -= 4;
516 opts_len -= 4;
517 }
518 break;
519
520 case PGM_OPT_JOIN:
521 #define PGM_OPT_JOIN_LEN (2+2+4)
522 if (opt_len != PGM_OPT_JOIN_LEN) {
523 ND_PRINT("[Bad OPT_JOIN option, length %u != %u]",
524 opt_len, PGM_OPT_JOIN_LEN);
525 return;
526 }
527 bp += 2;
528 seq = GET_BE_U_4(bp);
529 bp += 4;
530 ND_PRINT(" JOIN %u", seq);
531 opts_len -= PGM_OPT_JOIN_LEN;
532 break;
533
534 case PGM_OPT_NAK_BO_IVL:
535 #define PGM_OPT_NAK_BO_IVL_LEN (2+2+4+4)
536 if (opt_len != PGM_OPT_NAK_BO_IVL_LEN) {
537 ND_PRINT("[Bad OPT_NAK_BO_IVL option, length %u != %u]",
538 opt_len, PGM_OPT_NAK_BO_IVL_LEN);
539 return;
540 }
541 bp += 2;
542 offset = GET_BE_U_4(bp);
543 bp += 4;
544 seq = GET_BE_U_4(bp);
545 bp += 4;
546 ND_PRINT(" BACKOFF ivl %u ivlseq %u", offset, seq);
547 opts_len -= PGM_OPT_NAK_BO_IVL_LEN;
548 break;
549
550 case PGM_OPT_NAK_BO_RNG:
551 #define PGM_OPT_NAK_BO_RNG_LEN (2+2+4+4)
552 if (opt_len != PGM_OPT_NAK_BO_RNG_LEN) {
553 ND_PRINT("[Bad OPT_NAK_BO_RNG option, length %u != %u]",
554 opt_len, PGM_OPT_NAK_BO_RNG_LEN);
555 return;
556 }
557 bp += 2;
558 offset = GET_BE_U_4(bp);
559 bp += 4;
560 seq = GET_BE_U_4(bp);
561 bp += 4;
562 ND_PRINT(" BACKOFF max %u min %u", offset, seq);
563 opts_len -= PGM_OPT_NAK_BO_RNG_LEN;
564 break;
565
566 case PGM_OPT_REDIRECT:
567 #define PGM_OPT_REDIRECT_FIXED_LEN (2+2+2+2)
568 if (opt_len < PGM_OPT_REDIRECT_FIXED_LEN) {
569 ND_PRINT("[Bad OPT_REDIRECT option, length %u < %u]",
570 opt_len, PGM_OPT_REDIRECT_FIXED_LEN);
571 return;
572 }
573 bp += 2;
574 nla_afnum = GET_BE_U_2(bp);
575 bp += 2+2;
576 switch (nla_afnum) {
577 case AFNUM_INET:
578 if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv4)) {
579 ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]",
580 opt_len, PGM_OPT_REDIRECT_FIXED_LEN);
581 return;
582 }
583 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
584 addrtostr(bp, nla_buf, sizeof(nla_buf));
585 bp += sizeof(nd_ipv4);
586 opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv4);
587 break;
588 case AFNUM_INET6:
589 if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6)) {
590 ND_PRINT("[Bad OPT_REDIRECT option, length %u != %u + address size]",
591 opt_len, PGM_OPT_REDIRECT_FIXED_LEN);
592 return;
593 }
594 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
595 addrtostr6(bp, nla_buf, sizeof(nla_buf));
596 bp += sizeof(nd_ipv6);
597 opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(nd_ipv6);
598 break;
599 default:
600 goto trunc;
601 break;
602 }
603
604 ND_PRINT(" REDIRECT %s", nla_buf);
605 break;
606
607 case PGM_OPT_PARITY_PRM:
608 #define PGM_OPT_PARITY_PRM_LEN (2+2+4)
609 if (opt_len != PGM_OPT_PARITY_PRM_LEN) {
610 ND_PRINT("[Bad OPT_PARITY_PRM option, length %u != %u]",
611 opt_len, PGM_OPT_PARITY_PRM_LEN);
612 return;
613 }
614 bp += 2;
615 len = GET_BE_U_4(bp);
616 bp += 4;
617 ND_PRINT(" PARITY MAXTGS %u", len);
618 opts_len -= PGM_OPT_PARITY_PRM_LEN;
619 break;
620
621 case PGM_OPT_PARITY_GRP:
622 #define PGM_OPT_PARITY_GRP_LEN (2+2+4)
623 if (opt_len != PGM_OPT_PARITY_GRP_LEN) {
624 ND_PRINT("[Bad OPT_PARITY_GRP option, length %u != %u]",
625 opt_len, PGM_OPT_PARITY_GRP_LEN);
626 return;
627 }
628 bp += 2;
629 seq = GET_BE_U_4(bp);
630 bp += 4;
631 ND_PRINT(" PARITY GROUP %u", seq);
632 opts_len -= PGM_OPT_PARITY_GRP_LEN;
633 break;
634
635 case PGM_OPT_CURR_TGSIZE:
636 #define PGM_OPT_CURR_TGSIZE_LEN (2+2+4)
637 if (opt_len != PGM_OPT_CURR_TGSIZE_LEN) {
638 ND_PRINT("[Bad OPT_CURR_TGSIZE option, length %u != %u]",
639 opt_len, PGM_OPT_CURR_TGSIZE_LEN);
640 return;
641 }
642 bp += 2;
643 len = GET_BE_U_4(bp);
644 bp += 4;
645 ND_PRINT(" PARITY ATGS %u", len);
646 opts_len -= PGM_OPT_CURR_TGSIZE_LEN;
647 break;
648
649 case PGM_OPT_NBR_UNREACH:
650 #define PGM_OPT_NBR_UNREACH_LEN (2+2)
651 if (opt_len != PGM_OPT_NBR_UNREACH_LEN) {
652 ND_PRINT("[Bad OPT_NBR_UNREACH option, length %u != %u]",
653 opt_len, PGM_OPT_NBR_UNREACH_LEN);
654 return;
655 }
656 bp += 2;
657 ND_PRINT(" NBR_UNREACH");
658 opts_len -= PGM_OPT_NBR_UNREACH_LEN;
659 break;
660
661 case PGM_OPT_PATH_NLA:
662 ND_PRINT(" PATH_NLA [%u]", opt_len);
663 bp += opt_len;
664 opts_len -= opt_len;
665 break;
666
667 case PGM_OPT_SYN:
668 #define PGM_OPT_SYN_LEN (2+2)
669 if (opt_len != PGM_OPT_SYN_LEN) {
670 ND_PRINT("[Bad OPT_SYN option, length %u != %u]",
671 opt_len, PGM_OPT_SYN_LEN);
672 return;
673 }
674 bp += 2;
675 ND_PRINT(" SYN");
676 opts_len -= PGM_OPT_SYN_LEN;
677 break;
678
679 case PGM_OPT_FIN:
680 #define PGM_OPT_FIN_LEN (2+2)
681 if (opt_len != PGM_OPT_FIN_LEN) {
682 ND_PRINT("[Bad OPT_FIN option, length %u != %u]",
683 opt_len, PGM_OPT_FIN_LEN);
684 return;
685 }
686 bp += 2;
687 ND_PRINT(" FIN");
688 opts_len -= PGM_OPT_FIN_LEN;
689 break;
690
691 case PGM_OPT_RST:
692 #define PGM_OPT_RST_LEN (2+2)
693 if (opt_len != PGM_OPT_RST_LEN) {
694 ND_PRINT("[Bad OPT_RST option, length %u != %u]",
695 opt_len, PGM_OPT_RST_LEN);
696 return;
697 }
698 bp += 2;
699 ND_PRINT(" RST");
700 opts_len -= PGM_OPT_RST_LEN;
701 break;
702
703 case PGM_OPT_CR:
704 ND_PRINT(" CR");
705 bp += opt_len;
706 opts_len -= opt_len;
707 break;
708
709 case PGM_OPT_CRQST:
710 #define PGM_OPT_CRQST_LEN (2+2)
711 if (opt_len != PGM_OPT_CRQST_LEN) {
712 ND_PRINT("[Bad OPT_CRQST option, length %u != %u]",
713 opt_len, PGM_OPT_CRQST_LEN);
714 return;
715 }
716 bp += 2;
717 ND_PRINT(" CRQST");
718 opts_len -= PGM_OPT_CRQST_LEN;
719 break;
720
721 case PGM_OPT_PGMCC_DATA:
722 #define PGM_OPT_PGMCC_DATA_FIXED_LEN (2+2+4+2+2)
723 if (opt_len < PGM_OPT_PGMCC_DATA_FIXED_LEN) {
724 ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u < %u]",
725 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN);
726 return;
727 }
728 bp += 2;
729 offset = GET_BE_U_4(bp);
730 bp += 4;
731 nla_afnum = GET_BE_U_2(bp);
732 bp += 2+2;
733 switch (nla_afnum) {
734 case AFNUM_INET:
735 if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv4)) {
736 ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
737 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN);
738 return;
739 }
740 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
741 addrtostr(bp, nla_buf, sizeof(nla_buf));
742 bp += sizeof(nd_ipv4);
743 opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv4);
744 break;
745 case AFNUM_INET6:
746 if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv6)) {
747 ND_PRINT("[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
748 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN);
749 return;
750 }
751 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
752 addrtostr6(bp, nla_buf, sizeof(nla_buf));
753 bp += sizeof(nd_ipv6);
754 opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(nd_ipv6);
755 break;
756 default:
757 goto trunc;
758 break;
759 }
760
761 ND_PRINT(" PGMCC DATA %u %s", offset, nla_buf);
762 break;
763
764 case PGM_OPT_PGMCC_FEEDBACK:
765 #define PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN (2+2+4+2+2)
766 if (opt_len < PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN) {
767 ND_PRINT("[Bad PGM_OPT_PGMCC_FEEDBACK option, length %u < %u]",
768 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN);
769 return;
770 }
771 bp += 2;
772 offset = GET_BE_U_4(bp);
773 bp += 4;
774 nla_afnum = GET_BE_U_2(bp);
775 bp += 2+2;
776 switch (nla_afnum) {
777 case AFNUM_INET:
778 if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv4)) {
779 ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
780 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN);
781 return;
782 }
783 ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
784 addrtostr(bp, nla_buf, sizeof(nla_buf));
785 bp += sizeof(nd_ipv4);
786 opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv4);
787 break;
788 case AFNUM_INET6:
789 if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv6)) {
790 ND_PRINT("[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
791 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN);
792 return;
793 }
794 ND_TCHECK_LEN(bp, sizeof(nd_ipv6));
795 addrtostr6(bp, nla_buf, sizeof(nla_buf));
796 bp += sizeof(nd_ipv6);
797 opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(nd_ipv6);
798 break;
799 default:
800 goto trunc;
801 break;
802 }
803
804 ND_PRINT(" PGMCC FEEDBACK %u %s", offset, nla_buf);
805 break;
806
807 default:
808 ND_PRINT(" OPT_%02X [%u] ", opt_type, opt_len);
809 bp += opt_len;
810 opts_len -= opt_len;
811 break;
812 }
813
814 if (opt_type & PGM_OPT_END)
815 break;
816 }
817 }
818
819 ND_PRINT(" [%u]", length);
820 if (ndo->ndo_packettype == PT_PGM_ZMTP1 &&
821 (pgm_type_val == PGM_ODATA || pgm_type_val == PGM_RDATA))
822 zmtp1_datagram_print(ndo, bp,
823 GET_BE_U_2(pgm->pgm_length));
824
825 return;
826
827 trunc:
828 nd_print_trunc(ndo);
829 }
[mirror] the TCPdump network dissector