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.
13 * Original code by Andy Heffernan (ahh@juniper.net)
17 static const char rcsid[] _U_ =
18 "@(#) $Header: /tcpdump/master/tcpdump/print-pgm.c,v 1.5 2005-06-07 22:05:58 guy Exp $";
25 #include <tcpdump-stdinc.h>
31 #include "interface.h"
33 #include "addrtoname.h"
42 * PGM header (RFC 3208)
56 u_int32_t pgms_trailseq;
57 u_int32_t pgms_leadseq;
58 u_int16_t pgms_nla_afi;
59 u_int16_t pgms_reserved;
60 /* ... u_int8_t pgms_nla[0]; */
66 u_int16_t pgmn_source_afi;
67 u_int16_t pgmn_reserved;
68 /* ... u_int8_t pgmn_source[0]; */
69 /* ... u_int16_t pgmn_group_afi */
70 /* ... u_int16_t pgmn_reserved2; */
71 /* ... u_int8_t pgmn_group[0]; */
76 u_int32_t pgma_rx_max_seq;
77 u_int32_t pgma_bitmap;
84 u_int16_t pgmp_reserved;
91 u_int16_t pgmp_subtype;
92 u_int16_t pgmp_nla_afi;
93 u_int16_t pgmp_reserved;
94 /* ... u_int8_t pgmp_nla[0]; */
100 u_int32_t pgmd_trailseq;
104 typedef enum _pgm_type {
105 PGM_SPM = 0, /* source path message */
106 PGM_POLL = 1, /* POLL Request */
107 PGM_POLR = 2, /* POLL Response */
108 PGM_ODATA = 4, /* original data */
109 PGM_RDATA = 5, /* repair data */
110 PGM_NAK = 8, /* NAK */
111 PGM_NULLNAK = 9, /* Null NAK */
112 PGM_NCF = 10, /* NAK Confirmation */
113 PGM_ACK = 11, /* ACK for congestion control */
114 PGM_SPMR = 12, /* SPM request */
118 #define PGM_OPT_BIT_PRESENT 0x01
119 #define PGM_OPT_BIT_NETWORK 0x02
120 #define PGM_OPT_BIT_VAR_PKTLEN 0x40
121 #define PGM_OPT_BIT_PARITY 0x80
123 #define PGM_OPT_LENGTH 0x00
124 #define PGM_OPT_FRAGMENT 0x01
125 #define PGM_OPT_NAK_LIST 0x02
126 #define PGM_OPT_JOIN 0x03
127 #define PGM_OPT_NAK_BO_IVL 0x04
128 #define PGM_OPT_NAK_BO_RNG 0x05
130 #define PGM_OPT_REDIRECT 0x07
131 #define PGM_OPT_PARITY_PRM 0x08
132 #define PGM_OPT_PARITY_GRP 0x09
133 #define PGM_OPT_CURR_TGSIZE 0x0A
134 #define PGM_OPT_NBR_UNREACH 0x0B
135 #define PGM_OPT_PATH_NLA 0x0C
137 #define PGM_OPT_SYN 0x0D
138 #define PGM_OPT_FIN 0x0E
139 #define PGM_OPT_RST 0x0F
140 #define PGM_OPT_CR 0x10
141 #define PGM_OPT_CRQST 0x11
143 #define PGM_OPT_PGMCC_DATA 0x12
144 #define PGM_OPT_PGMCC_FEEDBACK 0x13
146 #define PGM_OPT_MASK 0x7f
148 #define PGM_OPT_END 0x80 /* end of options marker */
150 #define PGM_MIN_OPT_LEN 4
158 pgm_print(register const u_char *bp, register u_int length,
159 register const u_char *bp2)
161 register const struct pgm_header *pgm;
162 register const struct ip *ip;
164 u_int16_t sport, dport;
169 char nla_buf[INET6_ADDRSTRLEN];
170 register const struct ip6_hdr *ip6;
172 char nla_buf[INET_ADDRSTRLEN];
174 u_int8_t opt_type, opt_len, flags1, flags2;
175 u_int32_t seq, opts_len, len, offset;
177 pgm = (struct pgm_header *)bp;
178 ip = (struct ip *)bp2;
181 ip6 = (struct ip6_hdr *)bp2;
186 (void)printf("Can't handle IPv6");
191 if (!TTEST(pgm->pgm_dport)) {
194 (void)printf("%s > %s: [|pgm]",
195 ip6addr_string(&ip6->ip6_src),
196 ip6addr_string(&ip6->ip6_dst));
201 (void)printf("%s > %s: [|pgm]",
202 ipaddr_string(&ip->ip_src),
203 ipaddr_string(&ip->ip_dst));
208 sport = EXTRACT_16BITS(&pgm->pgm_sport);
209 dport = EXTRACT_16BITS(&pgm->pgm_dport);
213 if (ip6->ip6_nxt == IPPROTO_PGM) {
214 (void)printf("%s.%s > %s.%s: ",
215 ip6addr_string(&ip6->ip6_src),
216 tcpport_string(sport),
217 ip6addr_string(&ip6->ip6_dst),
218 tcpport_string(dport));
220 (void)printf("%s > %s: ",
221 tcpport_string(sport), tcpport_string(dport));
226 if (ip->ip_p == IPPROTO_PGM) {
227 (void)printf("%s.%s > %s.%s: ",
228 ipaddr_string(&ip->ip_src),
229 tcpport_string(sport),
230 ipaddr_string(&ip->ip_dst),
231 tcpport_string(dport));
233 (void)printf("%s > %s: ",
234 tcpport_string(sport), tcpport_string(dport));
240 (void)printf("PGM, length %u", pgm->pgm_length);
245 if (length > pgm->pgm_length)
246 length = pgm->pgm_length;
248 (void)printf(" 0x%02x%02x%02x%02x%02x%02x ",
255 switch (pgm->pgm_type) {
259 spm = (struct pgm_spm *)(pgm + 1);
262 switch (EXTRACT_16BITS(&spm->pgms_nla_afi)) {
264 addr_size = sizeof(struct in_addr);
269 addr_size = sizeof(struct in6_addr);
277 bp = (u_char *) (spm + 1);
278 TCHECK2(*bp, addr_size);
282 inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
283 (void)printf("SPM seq %u trail %u lead %u nla %s",
284 EXTRACT_32BITS(&spm->pgms_seq),
285 EXTRACT_32BITS(&spm->pgms_trailseq),
286 EXTRACT_32BITS(&spm->pgms_leadseq),
292 struct pgm_poll *poll;
294 poll = (struct pgm_poll *)(pgm + 1);
296 (void)printf("POLL seq %u round %u",
297 EXTRACT_32BITS(&poll->pgmp_seq),
298 EXTRACT_16BITS(&poll->pgmp_round));
299 bp = (u_char *) (poll + 1);
303 struct pgm_polr *polr;
304 u_int32_t ivl, rnd, mask;
306 polr = (struct pgm_polr *)(pgm + 1);
309 switch (EXTRACT_16BITS(&polr->pgmp_nla_afi)) {
311 addr_size = sizeof(struct in_addr);
316 addr_size = sizeof(struct in6_addr);
324 bp = (u_char *) (polr + 1);
325 TCHECK2(*bp, addr_size);
329 inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
331 TCHECK2(*bp, sizeof(u_int32_t));
332 ivl = EXTRACT_32BITS(bp);
333 bp += sizeof(u_int32_t);
335 TCHECK2(*bp, sizeof(u_int32_t));
336 rnd = EXTRACT_32BITS(bp);
337 bp += sizeof(u_int32_t);
339 TCHECK2(*bp, sizeof(u_int32_t));
340 mask = EXTRACT_32BITS(bp);
341 bp += sizeof(u_int32_t);
343 (void)printf("POLR seq %u round %u nla %s ivl %u rnd 0x%08x "
344 "mask 0x%08x", EXTRACT_32BITS(&polr->pgmp_seq),
345 EXTRACT_16BITS(&polr->pgmp_round), nla_buf, ivl, rnd, mask);
349 struct pgm_data *odata;
351 odata = (struct pgm_data *)(pgm + 1);
353 (void)printf("ODATA trail %u seq %u",
354 EXTRACT_32BITS(&odata->pgmd_trailseq),
355 EXTRACT_32BITS(&odata->pgmd_seq));
356 bp = (u_char *) (odata + 1);
361 struct pgm_data *rdata;
363 rdata = (struct pgm_data *)(pgm + 1);
365 (void)printf("RDATA trail %u seq %u",
366 EXTRACT_32BITS(&rdata->pgmd_trailseq),
367 EXTRACT_32BITS(&rdata->pgmd_seq));
368 bp = (u_char *) (rdata + 1);
376 const void *source, *group;
377 int source_af, group_af;
379 char source_buf[INET6_ADDRSTRLEN], group_buf[INET6_ADDRSTRLEN];
381 char source_buf[INET_ADDRSTRLEN], group_buf[INET_ADDRSTRLEN];
384 nak = (struct pgm_nak *)(pgm + 1);
388 * Skip past the source, saving info along the way
389 * and stopping if we don't have enough.
391 switch (EXTRACT_16BITS(&nak->pgmn_source_afi)) {
393 addr_size = sizeof(struct in_addr);
398 addr_size = sizeof(struct in6_addr);
399 source_af = AF_INET6;
406 bp = (u_char *) (nak + 1);
407 TCHECK2(*bp, addr_size);
412 * Skip past the group, saving info along the way
413 * and stopping if we don't have enough.
415 switch (EXTRACT_16BITS(bp)) {
417 addr_size = sizeof(struct in_addr);
422 addr_size = sizeof(struct in6_addr);
430 bp += (2 * sizeof(u_int16_t));
431 TCHECK2(*bp, addr_size);
436 * Options decoding can go here.
438 inet_ntop(source_af, source, source_buf, sizeof(source_buf));
439 inet_ntop(group_af, group, group_buf, sizeof(group_buf));
440 switch (pgm->pgm_type) {
442 (void)printf("NAK ");
445 (void)printf("NNAK ");
448 (void)printf("NCF ");
453 (void)printf("(%s -> %s), seq %u",
454 source_buf, group_buf, EXTRACT_32BITS(&nak->pgmn_seq));
461 ack = (struct pgm_ack *)(pgm + 1);
463 (void)printf("ACK seq %u",
464 EXTRACT_32BITS(&ack->pgma_rx_max_seq));
465 bp = (u_char *) (ack + 1);
470 (void)printf("SPMR");
474 (void)printf("UNKNOWN type %0x02x", pgm->pgm_type);
478 if (pgm->pgm_options & PGM_OPT_BIT_PRESENT) {
481 * make sure there's enough for the first option header
483 if (!TTEST2(*bp, PGM_MIN_OPT_LEN)) {
484 (void)printf("[|OPT]");
489 * That option header MUST be an OPT_LENGTH option
490 * (see the first paragraph of section 9.1 in RFC 3208).
493 if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) {
494 (void)printf("[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK);
499 (void)printf("[Bad OPT_LENGTH option, length %u != 4]", opt_len);
502 opts_len = EXTRACT_16BITS(bp);
504 (void)printf("[Bad total option length %u < 4]", opts_len);
507 bp += sizeof(u_int16_t);
508 (void)printf(" OPTS LEN %d", opts_len);
512 if (opts_len < PGM_MIN_OPT_LEN) {
513 (void)printf("[Total option length leaves no room for final option]");
518 if (opt_len < PGM_MIN_OPT_LEN) {
519 (void)printf("[Bad option, length %u < %u]", opt_len,
523 if (opts_len < opt_len) {
524 (void)printf("[Total option length leaves no room for final option]");
527 if (!TTEST2(*bp, opt_len - 2)) {
528 (void)printf(" [|OPT]");
532 switch (opt_type & PGM_OPT_MASK) {
535 (void)printf("[Bad OPT_LENGTH option, length %u != 4]", opt_len);
538 (void)printf(" OPTS LEN (extra?) %d", EXTRACT_16BITS(bp));
539 bp += sizeof(u_int16_t);
543 case PGM_OPT_FRAGMENT:
545 (void)printf("[Bad OPT_FRAGMENT option, length %u != 16]", opt_len);
550 seq = EXTRACT_32BITS(bp);
551 bp += sizeof(u_int32_t);
552 offset = EXTRACT_32BITS(bp);
553 bp += sizeof(u_int32_t);
554 len = EXTRACT_32BITS(bp);
555 bp += sizeof(u_int32_t);
556 (void)printf(" FRAG seq %u off %u len %u", seq, offset, len);
560 case PGM_OPT_NAK_LIST:
563 opt_len -= sizeof(u_int32_t); /* option header */
564 (void)printf(" NAK LIST");
566 if (opt_len < sizeof(u_int32_t)) {
567 (void)printf("[Option length not a multiple of 4]");
570 TCHECK2(*bp, sizeof(u_int32_t));
571 (void)printf(" %u", EXTRACT_32BITS(bp));
572 bp += sizeof(u_int32_t);
573 opt_len -= sizeof(u_int32_t);
574 opts_len -= sizeof(u_int32_t);
580 (void)printf("[Bad OPT_JOIN option, length %u != 8]", opt_len);
585 seq = EXTRACT_32BITS(bp);
586 bp += sizeof(u_int32_t);
587 (void)printf(" JOIN %u", seq);
591 case PGM_OPT_NAK_BO_IVL:
593 (void)printf("[Bad OPT_NAK_BO_IVL option, length %u != 12]", opt_len);
598 offset = EXTRACT_32BITS(bp);
599 bp += sizeof(u_int32_t);
600 seq = EXTRACT_32BITS(bp);
601 bp += sizeof(u_int32_t);
602 (void)printf(" BACKOFF ivl %u ivlseq %u", offset, seq);
606 case PGM_OPT_NAK_BO_RNG:
608 (void)printf("[Bad OPT_NAK_BO_RNG option, length %u != 12]", opt_len);
613 offset = EXTRACT_32BITS(bp);
614 bp += sizeof(u_int32_t);
615 seq = EXTRACT_32BITS(bp);
616 bp += sizeof(u_int32_t);
617 (void)printf(" BACKOFF max %u min %u", offset, seq);
621 case PGM_OPT_REDIRECT:
624 switch (EXTRACT_16BITS(bp)) {
626 addr_size = sizeof(struct in_addr);
631 addr_size = sizeof(struct in6_addr);
639 bp += (2 * sizeof(u_int16_t));
640 if (opt_len != 4 + addr_size) {
641 (void)printf("[Bad OPT_REDIRECT option, length %u != 4 + address size]", opt_len);
644 TCHECK2(*bp, addr_size);
648 inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
649 (void)printf(" REDIRECT %s", (char *)nla);
650 opts_len -= 4 + addr_size;
653 case PGM_OPT_PARITY_PRM:
655 (void)printf("[Bad OPT_PARITY_PRM option, length %u != 8]", opt_len);
660 len = EXTRACT_32BITS(bp);
661 bp += sizeof(u_int32_t);
662 (void)printf(" PARITY MAXTGS %u", len);
666 case PGM_OPT_PARITY_GRP:
668 (void)printf("[Bad OPT_PARITY_GRP option, length %u != 8]", opt_len);
673 seq = EXTRACT_32BITS(bp);
674 bp += sizeof(u_int32_t);
675 (void)printf(" PARITY GROUP %u", seq);
679 case PGM_OPT_CURR_TGSIZE:
681 (void)printf("[Bad OPT_CURR_TGSIZE option, length %u != 8]", opt_len);
686 len = EXTRACT_32BITS(bp);
687 bp += sizeof(u_int32_t);
688 (void)printf(" PARITY ATGS %u", len);
692 case PGM_OPT_NBR_UNREACH:
694 (void)printf("[Bad OPT_NBR_UNREACH option, length %u != 4]", opt_len);
699 (void)printf(" NBR_UNREACH");
703 case PGM_OPT_PATH_NLA:
704 (void)printf(" PATH_NLA [%d]", opt_len);
711 (void)printf("[Bad OPT_SYN option, length %u != 4]", opt_len);
716 (void)printf(" SYN");
722 (void)printf("[Bad OPT_FIN option, length %u != 4]", opt_len);
727 (void)printf(" FIN");
733 (void)printf("[Bad OPT_RST option, length %u != 4]", opt_len);
738 (void)printf(" RST");
750 (void)printf("[Bad OPT_CRQST option, length %u != 4]", opt_len);
755 (void)printf(" CRQST");
759 case PGM_OPT_PGMCC_DATA:
762 offset = EXTRACT_32BITS(bp);
763 bp += sizeof(u_int32_t);
764 switch (EXTRACT_16BITS(bp)) {
766 addr_size = sizeof(struct in_addr);
771 addr_size = sizeof(struct in6_addr);
779 bp += (2 * sizeof(u_int16_t));
780 if (opt_len != 12 + addr_size) {
781 (void)printf("[Bad OPT_PGMCC_DATA option, length %u != 12 + address size]", opt_len);
784 TCHECK2(*bp, addr_size);
788 inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
789 (void)printf(" PGMCC DATA %u %s", offset, (char*)nla);
793 case PGM_OPT_PGMCC_FEEDBACK:
796 offset = EXTRACT_32BITS(bp);
797 bp += sizeof(u_int32_t);
798 switch (EXTRACT_16BITS(bp)) {
800 addr_size = sizeof(struct in_addr);
805 addr_size = sizeof(struct in6_addr);
813 bp += (2 * sizeof(u_int16_t));
814 if (opt_len != 12 + addr_size) {
815 (void)printf("[Bad OPT_PGMCC_FEEDBACK option, length %u != 12 + address size]", opt_len);
818 TCHECK2(*bp, addr_size);
822 inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
823 (void)printf(" PGMCC FEEDBACK %u %s", offset, (char*)nla);
828 (void)printf(" OPT_%02X [%d] ", opt_type, opt_len);
834 if (opt_type & PGM_OPT_END)
839 (void)printf(" [%u]", EXTRACT_16BITS(&pgm->pgm_length));
844 fputs("[|pgm]", stdout);