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)
16 /* \summary: Pragmatic General Multicast (PGM) printer */
22 #include <netdissect-stdinc.h>
24 #include "netdissect.h"
26 #include "addrtoname.h"
27 #include "addrtostr.h"
35 * PGM header (RFC 3208)
49 uint32_t pgms_trailseq;
50 uint32_t pgms_leadseq;
51 uint16_t pgms_nla_afi;
52 uint16_t pgms_reserved;
53 /* ... uint8_t pgms_nla[0]; */
59 uint16_t pgmn_source_afi;
60 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]; */
69 uint32_t pgma_rx_max_seq;
77 uint16_t pgmp_reserved;
84 uint16_t pgmp_subtype;
85 uint16_t pgmp_nla_afi;
86 uint16_t pgmp_reserved;
87 /* ... uint8_t pgmp_nla[0]; */
93 uint32_t pgmd_trailseq;
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 */
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
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
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
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
136 #define PGM_OPT_PGMCC_DATA 0x12
137 #define PGM_OPT_PGMCC_FEEDBACK 0x13
139 #define PGM_OPT_MASK 0x7f
141 #define PGM_OPT_END 0x80 /* end of options marker */
143 #define PGM_MIN_OPT_LEN 4
146 pgm_print(netdissect_options *ndo,
147 register const u_char *bp, register u_int length,
148 register const u_char *bp2)
150 register const struct pgm_header *pgm;
151 register const struct ip *ip;
153 uint16_t sport, dport;
155 char nla_buf[INET6_ADDRSTRLEN];
156 register const struct ip6_hdr *ip6;
157 uint8_t opt_type, opt_len;
158 uint32_t seq, opts_len, len, offset;
160 pgm = (const struct pgm_header *)bp;
161 ip = (const struct ip *)bp2;
163 ip6 = (const struct ip6_hdr *)bp2;
167 if (!ND_TTEST(pgm->pgm_dport)) {
169 ND_PRINT((ndo, "%s > %s: [|pgm]",
170 ip6addr_string(ndo, &ip6->ip6_src),
171 ip6addr_string(ndo, &ip6->ip6_dst)));
173 ND_PRINT((ndo, "%s > %s: [|pgm]",
174 ipaddr_string(ndo, &ip->ip_src),
175 ipaddr_string(ndo, &ip->ip_dst)));
180 sport = EXTRACT_16BITS(&pgm->pgm_sport);
181 dport = EXTRACT_16BITS(&pgm->pgm_dport);
184 if (ip6->ip6_nxt == IPPROTO_PGM) {
185 ND_PRINT((ndo, "%s.%s > %s.%s: ",
186 ip6addr_string(ndo, &ip6->ip6_src),
187 tcpport_string(ndo, sport),
188 ip6addr_string(ndo, &ip6->ip6_dst),
189 tcpport_string(ndo, dport)));
191 ND_PRINT((ndo, "%s > %s: ",
192 tcpport_string(ndo, sport), tcpport_string(ndo, dport)));
195 if (ip->ip_p == IPPROTO_PGM) {
196 ND_PRINT((ndo, "%s.%s > %s.%s: ",
197 ipaddr_string(ndo, &ip->ip_src),
198 tcpport_string(ndo, sport),
199 ipaddr_string(ndo, &ip->ip_dst),
200 tcpport_string(ndo, dport)));
202 ND_PRINT((ndo, "%s > %s: ",
203 tcpport_string(ndo, sport), tcpport_string(ndo, dport)));
209 ND_PRINT((ndo, "PGM, length %u", EXTRACT_16BITS(&pgm->pgm_length)));
214 ND_PRINT((ndo, " 0x%02x%02x%02x%02x%02x%02x ",
221 switch (pgm->pgm_type) {
223 const struct pgm_spm *spm;
225 spm = (const struct pgm_spm *)(pgm + 1);
227 bp = (const u_char *) (spm + 1);
229 switch (EXTRACT_16BITS(&spm->pgms_nla_afi)) {
231 ND_TCHECK2(*bp, sizeof(struct in_addr));
232 addrtostr(bp, nla_buf, sizeof(nla_buf));
233 bp += sizeof(struct in_addr);
236 ND_TCHECK2(*bp, sizeof(struct in6_addr));
237 addrtostr6(bp, nla_buf, sizeof(nla_buf));
238 bp += sizeof(struct in6_addr);
245 ND_PRINT((ndo, "SPM seq %u trail %u lead %u nla %s",
246 EXTRACT_32BITS(&spm->pgms_seq),
247 EXTRACT_32BITS(&spm->pgms_trailseq),
248 EXTRACT_32BITS(&spm->pgms_leadseq),
254 const struct pgm_poll *poll_msg;
256 poll_msg = (const struct pgm_poll *)(pgm + 1);
257 ND_TCHECK(*poll_msg);
258 ND_PRINT((ndo, "POLL seq %u round %u",
259 EXTRACT_32BITS(&poll_msg->pgmp_seq),
260 EXTRACT_16BITS(&poll_msg->pgmp_round)));
261 bp = (const u_char *) (poll_msg + 1);
265 const struct pgm_polr *polr;
266 uint32_t ivl, rnd, mask;
268 polr = (const struct pgm_polr *)(pgm + 1);
270 bp = (const u_char *) (polr + 1);
272 switch (EXTRACT_16BITS(&polr->pgmp_nla_afi)) {
274 ND_TCHECK2(*bp, sizeof(struct in_addr));
275 addrtostr(bp, nla_buf, sizeof(nla_buf));
276 bp += sizeof(struct in_addr);
279 ND_TCHECK2(*bp, sizeof(struct in6_addr));
280 addrtostr6(bp, nla_buf, sizeof(nla_buf));
281 bp += sizeof(struct in6_addr);
288 ND_TCHECK2(*bp, sizeof(uint32_t));
289 ivl = EXTRACT_32BITS(bp);
290 bp += sizeof(uint32_t);
292 ND_TCHECK2(*bp, sizeof(uint32_t));
293 rnd = EXTRACT_32BITS(bp);
294 bp += sizeof(uint32_t);
296 ND_TCHECK2(*bp, sizeof(uint32_t));
297 mask = EXTRACT_32BITS(bp);
298 bp += sizeof(uint32_t);
300 ND_PRINT((ndo, "POLR seq %u round %u nla %s ivl %u rnd 0x%08x "
301 "mask 0x%08x", EXTRACT_32BITS(&polr->pgmp_seq),
302 EXTRACT_16BITS(&polr->pgmp_round), nla_buf, ivl, rnd, mask));
306 const struct pgm_data *odata;
308 odata = (const struct pgm_data *)(pgm + 1);
310 ND_PRINT((ndo, "ODATA trail %u seq %u",
311 EXTRACT_32BITS(&odata->pgmd_trailseq),
312 EXTRACT_32BITS(&odata->pgmd_seq)));
313 bp = (const u_char *) (odata + 1);
318 const struct pgm_data *rdata;
320 rdata = (const struct pgm_data *)(pgm + 1);
322 ND_PRINT((ndo, "RDATA trail %u seq %u",
323 EXTRACT_32BITS(&rdata->pgmd_trailseq),
324 EXTRACT_32BITS(&rdata->pgmd_seq)));
325 bp = (const u_char *) (rdata + 1);
332 const struct pgm_nak *nak;
333 char source_buf[INET6_ADDRSTRLEN], group_buf[INET6_ADDRSTRLEN];
335 nak = (const struct pgm_nak *)(pgm + 1);
337 bp = (const u_char *) (nak + 1);
340 * Skip past the source, saving info along the way
341 * and stopping if we don't have enough.
343 switch (EXTRACT_16BITS(&nak->pgmn_source_afi)) {
345 ND_TCHECK2(*bp, sizeof(struct in_addr));
346 addrtostr(bp, source_buf, sizeof(source_buf));
347 bp += sizeof(struct in_addr);
350 ND_TCHECK2(*bp, sizeof(struct in6_addr));
351 addrtostr6(bp, source_buf, sizeof(source_buf));
352 bp += sizeof(struct in6_addr);
360 * Skip past the group, saving info along the way
361 * and stopping if we don't have enough.
363 bp += (2 * sizeof(uint16_t));
364 ND_TCHECK_16BITS(bp);
365 switch (EXTRACT_16BITS(bp)) {
367 ND_TCHECK2(*bp, sizeof(struct in_addr));
368 addrtostr(bp, group_buf, sizeof(group_buf));
369 bp += sizeof(struct in_addr);
372 ND_TCHECK2(*bp, sizeof(struct in6_addr));
373 addrtostr6(bp, group_buf, sizeof(group_buf));
374 bp += sizeof(struct in6_addr);
382 * Options decoding can go here.
384 switch (pgm->pgm_type) {
386 ND_PRINT((ndo, "NAK "));
389 ND_PRINT((ndo, "NNAK "));
392 ND_PRINT((ndo, "NCF "));
397 ND_PRINT((ndo, "(%s -> %s), seq %u",
398 source_buf, group_buf, EXTRACT_32BITS(&nak->pgmn_seq)));
403 const struct pgm_ack *ack;
405 ack = (const struct pgm_ack *)(pgm + 1);
407 ND_PRINT((ndo, "ACK seq %u",
408 EXTRACT_32BITS(&ack->pgma_rx_max_seq)));
409 bp = (const u_char *) (ack + 1);
414 ND_PRINT((ndo, "SPMR"));
418 ND_PRINT((ndo, "UNKNOWN type 0x%02x", pgm->pgm_type));
422 if (pgm->pgm_options & PGM_OPT_BIT_PRESENT) {
425 * make sure there's enough for the first option header
427 if (!ND_TTEST2(*bp, PGM_MIN_OPT_LEN)) {
428 ND_PRINT((ndo, "[|OPT]"));
433 * That option header MUST be an OPT_LENGTH option
434 * (see the first paragraph of section 9.1 in RFC 3208).
437 if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) {
438 ND_PRINT((ndo, "[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK));
443 ND_PRINT((ndo, "[Bad OPT_LENGTH option, length %u != 4]", opt_len));
446 opts_len = EXTRACT_16BITS(bp);
448 ND_PRINT((ndo, "[Bad total option length %u < 4]", opts_len));
451 bp += sizeof(uint16_t);
452 ND_PRINT((ndo, " OPTS LEN %d", opts_len));
456 if (opts_len < PGM_MIN_OPT_LEN) {
457 ND_PRINT((ndo, "[Total option length leaves no room for final option]"));
460 if (!ND_TTEST2(*bp, 2)) {
461 ND_PRINT((ndo, " [|OPT]"));
466 if (opt_len < PGM_MIN_OPT_LEN) {
467 ND_PRINT((ndo, "[Bad option, length %u < %u]", opt_len,
471 if (opts_len < opt_len) {
472 ND_PRINT((ndo, "[Total option length leaves no room for final option]"));
475 if (!ND_TTEST2(*bp, opt_len - 2)) {
476 ND_PRINT((ndo, " [|OPT]"));
480 switch (opt_type & PGM_OPT_MASK) {
482 #define PGM_OPT_LENGTH_LEN (2+2)
483 if (opt_len != PGM_OPT_LENGTH_LEN) {
484 ND_PRINT((ndo, "[Bad OPT_LENGTH option, length %u != %u]",
485 opt_len, PGM_OPT_LENGTH_LEN));
488 ND_PRINT((ndo, " OPTS LEN (extra?) %d", EXTRACT_16BITS(bp)));
490 opts_len -= PGM_OPT_LENGTH_LEN;
493 case PGM_OPT_FRAGMENT:
494 #define PGM_OPT_FRAGMENT_LEN (2+2+4+4+4)
495 if (opt_len != PGM_OPT_FRAGMENT_LEN) {
496 ND_PRINT((ndo, "[Bad OPT_FRAGMENT option, length %u != %u]",
497 opt_len, PGM_OPT_FRAGMENT_LEN));
501 seq = EXTRACT_32BITS(bp);
503 offset = EXTRACT_32BITS(bp);
505 len = EXTRACT_32BITS(bp);
507 ND_PRINT((ndo, " FRAG seq %u off %u len %u", seq, offset, len));
508 opts_len -= PGM_OPT_FRAGMENT_LEN;
511 case PGM_OPT_NAK_LIST:
513 opt_len -= 4; /* option header */
514 ND_PRINT((ndo, " NAK LIST"));
517 ND_PRINT((ndo, "[Option length not a multiple of 4]"));
521 ND_PRINT((ndo, " %u", EXTRACT_32BITS(bp)));
529 #define PGM_OPT_JOIN_LEN (2+2+4)
530 if (opt_len != PGM_OPT_JOIN_LEN) {
531 ND_PRINT((ndo, "[Bad OPT_JOIN option, length %u != %u]",
532 opt_len, PGM_OPT_JOIN_LEN));
536 seq = EXTRACT_32BITS(bp);
538 ND_PRINT((ndo, " JOIN %u", seq));
539 opts_len -= PGM_OPT_JOIN_LEN;
542 case PGM_OPT_NAK_BO_IVL:
543 #define PGM_OPT_NAK_BO_IVL_LEN (2+2+4+4)
544 if (opt_len != PGM_OPT_NAK_BO_IVL_LEN) {
545 ND_PRINT((ndo, "[Bad OPT_NAK_BO_IVL option, length %u != %u]",
546 opt_len, PGM_OPT_NAK_BO_IVL_LEN));
550 offset = EXTRACT_32BITS(bp);
552 seq = EXTRACT_32BITS(bp);
554 ND_PRINT((ndo, " BACKOFF ivl %u ivlseq %u", offset, seq));
555 opts_len -= PGM_OPT_NAK_BO_IVL_LEN;
558 case PGM_OPT_NAK_BO_RNG:
559 #define PGM_OPT_NAK_BO_RNG_LEN (2+2+4+4)
560 if (opt_len != PGM_OPT_NAK_BO_RNG_LEN) {
561 ND_PRINT((ndo, "[Bad OPT_NAK_BO_RNG option, length %u != %u]",
562 opt_len, PGM_OPT_NAK_BO_RNG_LEN));
566 offset = EXTRACT_32BITS(bp);
568 seq = EXTRACT_32BITS(bp);
570 ND_PRINT((ndo, " BACKOFF max %u min %u", offset, seq));
571 opts_len -= PGM_OPT_NAK_BO_RNG_LEN;
574 case PGM_OPT_REDIRECT:
575 #define PGM_OPT_REDIRECT_FIXED_LEN (2+2+2+2)
576 if (opt_len < PGM_OPT_REDIRECT_FIXED_LEN) {
577 ND_PRINT((ndo, "[Bad OPT_REDIRECT option, length %u < %u]",
578 opt_len, PGM_OPT_REDIRECT_FIXED_LEN));
582 nla_afnum = EXTRACT_16BITS(bp);
586 if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in_addr)) {
587 ND_PRINT((ndo, "[Bad OPT_REDIRECT option, length %u != %u + address size]",
588 opt_len, PGM_OPT_REDIRECT_FIXED_LEN));
591 ND_TCHECK2(*bp, sizeof(struct in_addr));
592 addrtostr(bp, nla_buf, sizeof(nla_buf));
593 bp += sizeof(struct in_addr);
594 opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in_addr);
597 if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in6_addr)) {
598 ND_PRINT((ndo, "[Bad OPT_REDIRECT option, length %u != %u + address size]",
599 PGM_OPT_REDIRECT_FIXED_LEN, opt_len));
602 ND_TCHECK2(*bp, sizeof(struct in6_addr));
603 addrtostr6(bp, nla_buf, sizeof(nla_buf));
604 bp += sizeof(struct in6_addr);
605 opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in6_addr);
612 ND_PRINT((ndo, " REDIRECT %s", nla_buf));
615 case PGM_OPT_PARITY_PRM:
616 #define PGM_OPT_PARITY_PRM_LEN (2+2+4)
617 if (opt_len != PGM_OPT_PARITY_PRM_LEN) {
618 ND_PRINT((ndo, "[Bad OPT_PARITY_PRM option, length %u != %u]",
619 opt_len, PGM_OPT_PARITY_PRM_LEN));
623 len = EXTRACT_32BITS(bp);
625 ND_PRINT((ndo, " PARITY MAXTGS %u", len));
626 opts_len -= PGM_OPT_PARITY_PRM_LEN;
629 case PGM_OPT_PARITY_GRP:
630 #define PGM_OPT_PARITY_GRP_LEN (2+2+4)
631 if (opt_len != PGM_OPT_PARITY_GRP_LEN) {
632 ND_PRINT((ndo, "[Bad OPT_PARITY_GRP option, length %u != %u]",
633 opt_len, PGM_OPT_PARITY_GRP_LEN));
637 seq = EXTRACT_32BITS(bp);
639 ND_PRINT((ndo, " PARITY GROUP %u", seq));
640 opts_len -= PGM_OPT_PARITY_GRP_LEN;
643 case PGM_OPT_CURR_TGSIZE:
644 #define PGM_OPT_CURR_TGSIZE_LEN (2+2+4)
645 if (opt_len != PGM_OPT_CURR_TGSIZE_LEN) {
646 ND_PRINT((ndo, "[Bad OPT_CURR_TGSIZE option, length %u != %u]",
647 opt_len, PGM_OPT_CURR_TGSIZE_LEN));
651 len = EXTRACT_32BITS(bp);
653 ND_PRINT((ndo, " PARITY ATGS %u", len));
654 opts_len -= PGM_OPT_CURR_TGSIZE_LEN;
657 case PGM_OPT_NBR_UNREACH:
658 #define PGM_OPT_NBR_UNREACH_LEN (2+2)
659 if (opt_len != PGM_OPT_NBR_UNREACH_LEN) {
660 ND_PRINT((ndo, "[Bad OPT_NBR_UNREACH option, length %u != %u]",
661 opt_len, PGM_OPT_NBR_UNREACH_LEN));
665 ND_PRINT((ndo, " NBR_UNREACH"));
666 opts_len -= PGM_OPT_NBR_UNREACH_LEN;
669 case PGM_OPT_PATH_NLA:
670 ND_PRINT((ndo, " PATH_NLA [%d]", opt_len));
676 #define PGM_OPT_SYN_LEN (2+2)
677 if (opt_len != PGM_OPT_SYN_LEN) {
678 ND_PRINT((ndo, "[Bad OPT_SYN option, length %u != %u]",
679 opt_len, PGM_OPT_SYN_LEN));
683 ND_PRINT((ndo, " SYN"));
684 opts_len -= PGM_OPT_SYN_LEN;
688 #define PGM_OPT_FIN_LEN (2+2)
689 if (opt_len != PGM_OPT_FIN_LEN) {
690 ND_PRINT((ndo, "[Bad OPT_FIN option, length %u != %u]",
691 opt_len, PGM_OPT_FIN_LEN));
695 ND_PRINT((ndo, " FIN"));
696 opts_len -= PGM_OPT_FIN_LEN;
700 #define PGM_OPT_RST_LEN (2+2)
701 if (opt_len != PGM_OPT_RST_LEN) {
702 ND_PRINT((ndo, "[Bad OPT_RST option, length %u != %u]",
703 opt_len, PGM_OPT_RST_LEN));
707 ND_PRINT((ndo, " RST"));
708 opts_len -= PGM_OPT_RST_LEN;
712 ND_PRINT((ndo, " CR"));
718 #define PGM_OPT_CRQST_LEN (2+2)
719 if (opt_len != PGM_OPT_CRQST_LEN) {
720 ND_PRINT((ndo, "[Bad OPT_CRQST option, length %u != %u]",
721 opt_len, PGM_OPT_CRQST_LEN));
725 ND_PRINT((ndo, " CRQST"));
726 opts_len -= PGM_OPT_CRQST_LEN;
729 case PGM_OPT_PGMCC_DATA:
730 #define PGM_OPT_PGMCC_DATA_FIXED_LEN (2+2+4+2+2)
731 if (opt_len < PGM_OPT_PGMCC_DATA_FIXED_LEN) {
732 ND_PRINT((ndo, "[Bad OPT_PGMCC_DATA option, length %u < %u]",
733 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN));
737 offset = EXTRACT_32BITS(bp);
739 nla_afnum = EXTRACT_16BITS(bp);
743 if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in_addr)) {
744 ND_PRINT((ndo, "[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
745 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN));
748 ND_TCHECK2(*bp, sizeof(struct in_addr));
749 addrtostr(bp, nla_buf, sizeof(nla_buf));
750 bp += sizeof(struct in_addr);
751 opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in_addr);
754 if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in6_addr)) {
755 ND_PRINT((ndo, "[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
756 opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN));
759 ND_TCHECK2(*bp, sizeof(struct in6_addr));
760 addrtostr6(bp, nla_buf, sizeof(nla_buf));
761 bp += sizeof(struct in6_addr);
762 opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in6_addr);
769 ND_PRINT((ndo, " PGMCC DATA %u %s", offset, nla_buf));
772 case PGM_OPT_PGMCC_FEEDBACK:
773 #define PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN (2+2+4+2+2)
774 if (opt_len < PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN) {
775 ND_PRINT((ndo, "[Bad PGM_OPT_PGMCC_FEEDBACK option, length %u < %u]",
776 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN));
780 offset = EXTRACT_32BITS(bp);
782 nla_afnum = EXTRACT_16BITS(bp);
786 if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in_addr)) {
787 ND_PRINT((ndo, "[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
788 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN));
791 ND_TCHECK2(*bp, sizeof(struct in_addr));
792 addrtostr(bp, nla_buf, sizeof(nla_buf));
793 bp += sizeof(struct in_addr);
794 opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in_addr);
797 if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in6_addr)) {
798 ND_PRINT((ndo, "[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
799 opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN));
802 ND_TCHECK2(*bp, sizeof(struct in6_addr));
803 addrtostr6(bp, nla_buf, sizeof(nla_buf));
804 bp += sizeof(struct in6_addr);
805 opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in6_addr);
812 ND_PRINT((ndo, " PGMCC FEEDBACK %u %s", offset, nla_buf));
816 ND_PRINT((ndo, " OPT_%02X [%d] ", opt_type, opt_len));
822 if (opt_type & PGM_OPT_END)
827 ND_PRINT((ndo, " [%u]", length));
828 if (ndo->ndo_packettype == PT_PGM_ZMTP1 &&
829 (pgm->pgm_type == PGM_ODATA || pgm->pgm_type == PGM_RDATA))
830 zmtp1_print_datagram(ndo, bp, EXTRACT_16BITS(&pgm->pgm_length));
835 ND_PRINT((ndo, "[|pgm]"));
837 ND_PRINT((ndo, ">"));