2 * Copyright (c) 1995, 1996
3 * The Regents of the University of California. All rights reserved.
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
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.
22 /* \summary: Protocol Independent Multicast (PIM) printer */
28 #include "netdissect-stdinc.h"
30 #include "netdissect.h"
31 #include "addrtoname.h"
38 #define PIMV1_TYPE_QUERY 0
39 #define PIMV1_TYPE_REGISTER 1
40 #define PIMV1_TYPE_REGISTER_STOP 2
41 #define PIMV1_TYPE_JOIN_PRUNE 3
42 #define PIMV1_TYPE_RP_REACHABILITY 4
43 #define PIMV1_TYPE_ASSERT 5
44 #define PIMV1_TYPE_GRAFT 6
45 #define PIMV1_TYPE_GRAFT_ACK 7
47 static const struct tok pimv1_type_str[] = {
48 { PIMV1_TYPE_QUERY, "Query" },
49 { PIMV1_TYPE_REGISTER, "Register" },
50 { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" },
51 { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" },
52 { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" },
53 { PIMV1_TYPE_ASSERT, "Assert" },
54 { PIMV1_TYPE_GRAFT, "Graft" },
55 { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" },
59 #define PIMV2_TYPE_HELLO 0
60 #define PIMV2_TYPE_REGISTER 1
61 #define PIMV2_TYPE_REGISTER_STOP 2
62 #define PIMV2_TYPE_JOIN_PRUNE 3
63 #define PIMV2_TYPE_BOOTSTRAP 4
64 #define PIMV2_TYPE_ASSERT 5
65 #define PIMV2_TYPE_GRAFT 6
66 #define PIMV2_TYPE_GRAFT_ACK 7
67 #define PIMV2_TYPE_CANDIDATE_RP 8
68 #define PIMV2_TYPE_PRUNE_REFRESH 9
69 #define PIMV2_TYPE_DF_ELECTION 10
70 #define PIMV2_TYPE_ECMP_REDIRECT 11
72 static const struct tok pimv2_type_values[] = {
73 { PIMV2_TYPE_HELLO, "Hello" },
74 { PIMV2_TYPE_REGISTER, "Register" },
75 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
76 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" },
77 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" },
78 { PIMV2_TYPE_ASSERT, "Assert" },
79 { PIMV2_TYPE_GRAFT, "Graft" },
80 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" },
81 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" },
82 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
83 { PIMV2_TYPE_DF_ELECTION, "DF Election" },
84 { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" },
88 #define PIMV2_HELLO_OPTION_HOLDTIME 1
89 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2
90 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18
91 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19
92 #define PIMV2_HELLO_OPTION_GENID 20
93 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21
94 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22
95 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24
96 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
98 static const struct tok pimv2_hello_option_values[] = {
99 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" },
100 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" },
101 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" },
102 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" },
103 { PIMV2_HELLO_OPTION_GENID, "Generation ID" },
104 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" },
105 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" },
106 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" },
107 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
111 #define PIMV2_REGISTER_FLAG_LEN 4
112 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000
113 #define PIMV2_REGISTER_FLAG_NULL 0x40000000
115 static const struct tok pimv2_register_flag_values[] = {
116 { PIMV2_REGISTER_FLAG_BORDER, "Border" },
117 { PIMV2_REGISTER_FLAG_NULL, "Null" },
121 #define PIMV2_DF_ELECTION_OFFER 1
122 #define PIMV2_DF_ELECTION_WINNER 2
123 #define PIMV2_DF_ELECTION_BACKOFF 3
124 #define PIMV2_DF_ELECTION_PASS 4
126 static const struct tok pimv2_df_election_flag_values[] = {
127 { PIMV2_DF_ELECTION_OFFER, "Offer" },
128 { PIMV2_DF_ELECTION_WINNER, "Winner" },
129 { PIMV2_DF_ELECTION_BACKOFF, "Backoff" },
130 { PIMV2_DF_ELECTION_PASS, "Pass" },
134 #define PIMV2_DF_ELECTION_PASS_BACKOFF_STR(x) ( \
135 x == PIMV2_DF_ELECTION_BACKOFF ? "offer" : "new winner" )
139 * XXX: We consider a case where IPv6 is not ready yet for portability,
140 * but PIM dependent definitions should be independent of IPv6...
144 nd_uint8_t pim_typever;
145 /* upper 4bit: PIM version number; 2 for PIMv2 */
146 /* lower 4bit: the PIM message type, currently they are:
147 * Hello, Register, Register-Stop, Join/Prune,
148 * Bootstrap, Assert, Graft (PIM-DM only),
149 * Graft-Ack (PIM-DM only), C-RP-Adv
151 #define PIM_VER(x) (((x) & 0xf0) >> 4)
152 #define PIM_TYPE(x) ((x) & 0x0f)
153 nd_uint8_t pim_rsv; /* Reserved in v1, subtype+address length in v2 */
154 #define PIM_SUBTYPE(x) (((x) & 0xf0) >> 4)
155 nd_uint16_t pim_cksum; /* IP style check sum */
158 static void pimv2_print(netdissect_options *, const u_char *bp, u_int len, const u_char *);
161 pimv1_join_prune_print(netdissect_options *ndo,
162 const u_char *bp, u_int len)
164 u_int ngroups, njoin, nprune;
167 /* If it's a single group and a single source, use 1-line output. */
168 if (ND_TTEST_LEN(bp, 30) && GET_U_1(bp + 11) == 1 &&
169 ((njoin = GET_BE_U_2(bp + 20)) + GET_BE_U_2(bp + 22)) == 1) {
172 ND_PRINT(" RPF %s ", GET_IPADDR_STRING(bp));
173 hold = GET_BE_U_2(bp + 6);
176 unsigned_relts_print(ndo, hold);
178 ND_PRINT("%s (%s/%u, %s", njoin ? "Join" : "Prune",
179 GET_IPADDR_STRING(bp + 26), GET_U_1(bp + 25) & 0x3f,
180 GET_IPADDR_STRING(bp + 12));
181 if (GET_BE_U_4(bp + 16) != 0xffffffff)
182 ND_PRINT("/%s", GET_IPADDR_STRING(bp + 16));
183 ND_PRINT(") %s%s %s",
184 (GET_U_1(bp + 24) & 0x01) ? "Sparse" : "Dense",
185 (GET_U_1(bp + 25) & 0x80) ? " WC" : "",
186 (GET_U_1(bp + 25) & 0x40) ? "RP" : "SPT");
190 if (len < sizeof(nd_ipv4))
192 if (ndo->ndo_vflag > 1)
194 ND_PRINT(" Upstream Nbr: %s", GET_IPADDR_STRING(bp));
199 if (ndo->ndo_vflag > 1)
201 ND_PRINT(" Hold time: ");
202 unsigned_relts_print(ndo, GET_BE_U_2(bp + 2));
203 if (ndo->ndo_vflag < 2)
210 ngroups = GET_U_1(bp + 3);
213 while (ngroups != 0) {
215 * XXX - does the address have length "addrlen" and the
216 * mask length "maddrlen"?
220 ND_PRINT("\n\tGroup: %s", GET_IPADDR_STRING(bp));
225 if (GET_BE_U_4(bp) != 0xffffffff)
226 ND_PRINT("/%s", GET_IPADDR_STRING(bp));
231 njoin = GET_BE_U_2(bp);
232 nprune = GET_BE_U_2(bp + 2);
233 ND_PRINT(" joined: %u pruned: %u", njoin, nprune);
236 for (njp = 0; njp < (njoin + nprune); njp++) {
245 ND_PRINT("\n\t%s %s%s%s%s/%u", type,
246 (GET_U_1(bp) & 0x01) ? "Sparse " : "Dense ",
247 (GET_U_1(bp + 1) & 0x80) ? "WC " : "",
248 (GET_U_1(bp + 1) & 0x40) ? "RP " : "SPT ",
249 GET_IPADDR_STRING(bp + 2),
250 GET_U_1(bp + 1) & 0x3f);
262 pimv1_print(netdissect_options *ndo,
263 const u_char *bp, u_int len)
267 ndo->ndo_protocol = "pimv1";
268 type = GET_U_1(bp + 1);
270 ND_PRINT(" %s", tok2str(pimv1_type_str, "[type %u]", type));
272 case PIMV1_TYPE_QUERY:
273 if (ND_TTEST_1(bp + 8)) {
274 switch (GET_U_1(bp + 8) >> 4) {
276 ND_PRINT(" Dense-mode");
279 ND_PRINT(" Sparse-mode");
282 ND_PRINT(" Sparse-Dense-mode");
285 ND_PRINT(" mode-%u", GET_U_1(bp + 8) >> 4);
289 if (ndo->ndo_vflag) {
290 ND_PRINT(" (Hold-time ");
291 unsigned_relts_print(ndo, GET_BE_U_2(bp + 10));
296 case PIMV1_TYPE_REGISTER:
297 ND_TCHECK_LEN(bp + 8, 20); /* ip header */
298 ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 20),
299 GET_IPADDR_STRING(bp + 24));
301 case PIMV1_TYPE_REGISTER_STOP:
302 ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 8),
303 GET_IPADDR_STRING(bp + 12));
305 case PIMV1_TYPE_RP_REACHABILITY:
306 if (ndo->ndo_vflag) {
307 ND_PRINT(" group %s", GET_IPADDR_STRING(bp + 8));
308 if (GET_BE_U_4(bp + 12) != 0xffffffff)
309 ND_PRINT("/%s", GET_IPADDR_STRING(bp + 12));
310 ND_PRINT(" RP %s hold ", GET_IPADDR_STRING(bp + 16));
311 unsigned_relts_print(ndo, GET_BE_U_2(bp + 22));
314 case PIMV1_TYPE_ASSERT:
315 ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 16),
316 GET_IPADDR_STRING(bp + 8));
317 if (GET_BE_U_4(bp + 12) != 0xffffffff)
318 ND_PRINT("/%s", GET_IPADDR_STRING(bp + 12));
319 ND_PRINT(" %s pref %u metric %u",
320 (GET_U_1(bp + 20) & 0x80) ? "RP-tree" : "SPT",
321 GET_BE_U_4(bp + 20) & 0x7fffffff,
322 GET_BE_U_4(bp + 24));
324 case PIMV1_TYPE_JOIN_PRUNE:
325 case PIMV1_TYPE_GRAFT:
326 case PIMV1_TYPE_GRAFT_ACK:
327 if (ndo->ndo_vflag) {
330 pimv1_join_prune_print(ndo, bp + 8, len - 8);
334 if ((GET_U_1(bp + 4) >> 4) != 1)
335 ND_PRINT(" [v%u]", GET_U_1(bp + 4) >> 4);
343 * auto-RP is a cisco protocol, documented at
344 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
346 * This implements version 1+, dated Sept 9, 1998.
349 cisco_autorp_print(netdissect_options *ndo,
350 const u_char *bp, u_int len)
356 ndo->ndo_protocol = "cisco_autorp";
359 ND_PRINT(" auto-rp ");
363 ND_PRINT("candidate-advert");
369 ND_PRINT("type-0x%02x", type);
373 numrps = GET_U_1(bp + 1);
376 hold = GET_BE_U_2(bp + 2);
378 unsigned_relts_print(ndo, GET_BE_U_2(bp + 2));
382 /* Next 4 bytes are reserved. */
386 /*XXX skip unless -v? */
390 * numrps entries of the form:
393 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
394 * 8 bits: # of entries for this RP
395 * each entry: 7 bits: reserved, 1 bit: negative,
396 * 8 bits: mask 32 bits: source
397 * lather, rinse, repeat.
399 while (numrps != 0) {
405 ND_PRINT(" RP %s", GET_IPADDR_STRING(bp));
410 switch (GET_U_1(bp) & 0x3) {
411 case 0: ND_PRINT(" PIMv?");
413 case 1: ND_PRINT(" PIMv1");
415 case 2: ND_PRINT(" PIMv2");
417 case 3: ND_PRINT(" PIMv1+2");
420 if (GET_U_1(bp) & 0xfc)
421 ND_PRINT(" [rsvd=0x%02x]", GET_U_1(bp) & 0xfc);
426 nentries = GET_U_1(bp);
430 while (nentries != 0) {
433 ND_PRINT("%c%s%s/%u", s, GET_U_1(bp) & 1 ? "!" : "",
434 GET_IPADDR_STRING(bp + 2), GET_U_1(bp + 1));
435 if (GET_U_1(bp) & 0x02) {
438 if (GET_U_1(bp) & 0xfc) {
439 ND_PRINT("[rsvd=0x%02x]", GET_U_1(bp) & 0xfc);
454 pim_print(netdissect_options *ndo,
455 const u_char *bp, u_int len, const u_char *bp2)
457 const struct pim *pim = (const struct pim *)bp;
460 ndo->ndo_protocol = "pim";
462 pim_typever = GET_U_1(pim->pim_typever);
463 switch (PIM_VER(pim_typever)) {
465 if (!ndo->ndo_vflag) {
466 ND_PRINT("PIMv%u, %s, length %u",
467 PIM_VER(pim_typever),
468 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever)),
472 ND_PRINT("PIMv%u, length %u\n\t%s",
473 PIM_VER(pim_typever),
475 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever)));
476 pimv2_print(ndo, bp, len, bp2);
480 ND_PRINT("PIMv%u, length %u",
481 PIM_VER(pim_typever),
488 * PIMv2 uses encoded address representations.
490 * The last PIM-SM I-D before RFC2117 was published specified the
491 * following representation for unicast addresses. However, RFC2117
492 * specified no encoding for unicast addresses with the unicast
493 * address length specified in the header. Therefore, we have to
494 * guess which encoding is being used (Cisco's PIMv2 implementation
495 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
496 * field into a 'unicast-address-length-in-bytes' field. We guess
497 * that it's the draft encoding if this reserved field is zero.
499 * RFC2362 goes back to the encoded format, and calls the addr length
500 * field "reserved" again.
502 * The first byte is the address family, from:
505 * 1 IP (IP version 4)
506 * 2 IP6 (IP version 6)
508 * 4 HDLC (8-bit multidrop)
510 * 6 802 (includes all 802 media plus Ethernet "canonical format")
512 * 8 E.164 (SMDS, Frame Relay, ATM)
514 * 10 X.121 (X.25, Frame Relay)
519 * 15 E.164 with NSAP format subaddress
521 * In addition, the second byte is an "Encoding". 0 is the default
522 * encoding for the address family, and no other encodings are currently
527 enum pimv2_addrtype {
528 pimv2_unicast, pimv2_group, pimv2_source
532 * 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
533 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
534 * | Addr Family | Encoding Type | Unicast Address |
535 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
537 * 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
538 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
539 * | Addr Family | Encoding Type | Reserved | Mask Len |
540 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
541 * | Group multicast Address |
542 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
544 * 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
545 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
546 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
547 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
549 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
552 pimv2_addr_print(netdissect_options *ndo,
553 const u_char *bp, u_int len, enum pimv2_addrtype at,
554 u_int addr_len, int silent)
562 switch (GET_U_1(bp)) {
565 addr_len = (u_int)sizeof(nd_ipv4);
569 addr_len = (u_int)sizeof(nd_ipv6);
574 if (GET_U_1(bp + 1) != 0)
579 case sizeof(nd_ipv4):
582 case sizeof(nd_ipv6):
598 ND_TCHECK_LEN(bp, addr_len);
601 ND_PRINT("%s", GET_IPADDR_STRING(bp));
603 else if (af == AF_INET6) {
605 ND_PRINT("%s", GET_IP6ADDR_STRING(bp));
607 return hdrlen + addr_len;
610 if (len < addr_len + 2)
612 ND_TCHECK_LEN(bp, addr_len + 2);
615 ND_PRINT("%s", GET_IPADDR_STRING(bp + 2));
616 if (GET_U_1(bp + 1) != 32)
617 ND_PRINT("/%u", GET_U_1(bp + 1));
620 else if (af == AF_INET6) {
622 ND_PRINT("%s", GET_IP6ADDR_STRING(bp + 2));
623 if (GET_U_1(bp + 1) != 128)
624 ND_PRINT("/%u", GET_U_1(bp + 1));
627 if (GET_U_1(bp) && !silent) {
628 if (at == pimv2_group) {
629 ND_PRINT("(0x%02x)", GET_U_1(bp));
632 GET_U_1(bp) & 0x04 ? "S" : "",
633 GET_U_1(bp) & 0x02 ? "W" : "",
634 GET_U_1(bp) & 0x01 ? "R" : "");
635 if (GET_U_1(bp) & 0xf8) {
642 return hdrlen + 2 + addr_len;
650 enum checksum_status {
656 static enum checksum_status
657 pimv2_check_checksum(netdissect_options *ndo, const u_char *bp,
658 const u_char *bp2, u_int len)
663 if (!ND_TTEST_LEN(bp, len)) {
664 /* We don't have all the data. */
667 ip = (const struct ip *)bp2;
669 struct cksum_vec vec[1];
673 cksum = in_cksum(vec, 1);
674 return (cksum ? INCORRECT : CORRECT);
675 } else if (IP_V(ip) == 6) {
676 const struct ip6_hdr *ip6;
678 ip6 = (const struct ip6_hdr *)bp2;
679 cksum = nextproto6_cksum(ndo, ip6, bp, len, len, IPPROTO_PIM);
680 return (cksum ? INCORRECT : CORRECT);
687 pimv2_print(netdissect_options *ndo,
688 const u_char *bp, u_int len, const u_char *bp2)
690 const struct pim *pim = (const struct pim *)bp;
693 enum checksum_status cksum_status;
695 u_int pimv2_addr_len;
697 ndo->ndo_protocol = "pimv2";
699 ND_PRINT("[length %u < 2]", len);
700 nd_print_invalid(ndo);
703 pim_typever = GET_U_1(pim->pim_typever);
704 /* RFC5015 allocates the high 4 bits of pim_rsv for "subtype". */
705 pimv2_addr_len = GET_U_1(pim->pim_rsv) & 0x0f;
706 if (pimv2_addr_len != 0)
707 ND_PRINT(", RFC2117-encoding");
710 ND_PRINT("[length %u < 4]", len);
711 nd_print_invalid(ndo);
714 ND_PRINT(", cksum 0x%04x ", GET_BE_U_2(pim->pim_cksum));
715 if (GET_BE_U_2(pim->pim_cksum) == 0) {
716 ND_PRINT("(unverified)");
718 if (PIM_TYPE(pim_typever) == PIMV2_TYPE_REGISTER) {
720 * The checksum only covers the packet header,
721 * not the encapsulated packet.
723 cksum_status = pimv2_check_checksum(ndo, bp, bp2, 8);
724 if (cksum_status == INCORRECT) {
726 * To quote RFC 4601, "For interoperability
727 * reasons, a message carrying a checksum
728 * calculated over the entire PIM Register
729 * message should also be accepted."
731 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len);
735 * The checksum covers the entire packet.
737 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len);
739 switch (cksum_status) {
742 ND_PRINT("(correct)");
746 ND_PRINT("(incorrect)");
750 ND_PRINT("(unverified)");
757 switch (PIM_TYPE(pim_typever)) {
758 case PIMV2_TYPE_HELLO:
760 uint16_t otype, olen;
764 otype = GET_BE_U_2(bp);
765 olen = GET_BE_U_2(bp + 2);
766 ND_PRINT("\n\t %s Option (%u), length %u, Value: ",
767 tok2str(pimv2_hello_option_values, "Unknown", otype),
775 ND_TCHECK_LEN(bp, olen);
777 case PIMV2_HELLO_OPTION_HOLDTIME:
779 ND_PRINT("[option length %u != 2]", olen);
780 nd_print_invalid(ndo);
783 unsigned_relts_print(ndo,
788 case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
790 ND_PRINT("[option length %u != 4]", olen);
791 nd_print_invalid(ndo);
795 uint16_t lan_delay, override_interval;
796 lan_delay = GET_BE_U_2(bp);
797 override_interval = GET_BE_U_2(bp + 2);
798 t_bit = (lan_delay & 0x8000)? 1 : 0;
799 lan_delay &= ~0x8000;
800 ND_PRINT("\n\t T-bit=%u, LAN delay %ums, Override interval %ums",
801 t_bit, lan_delay, override_interval);
805 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
806 case PIMV2_HELLO_OPTION_DR_PRIORITY:
809 ND_PRINT("Bi-Directional Capability (Old)");
812 ND_PRINT("%u", GET_BE_U_4(bp));
815 ND_PRINT("[option length %u != 4]", olen);
816 nd_print_invalid(ndo);
822 case PIMV2_HELLO_OPTION_GENID:
824 ND_PRINT("[option length %u != 4]", olen);
825 nd_print_invalid(ndo);
828 ND_PRINT("0x%08x", GET_BE_U_4(bp));
832 case PIMV2_HELLO_OPTION_REFRESH_CAP:
834 ND_PRINT("[option length %u != 4]", olen);
835 nd_print_invalid(ndo);
838 ND_PRINT("v%u", GET_U_1(bp));
839 if (GET_U_1(bp + 1) != 0) {
840 ND_PRINT(", interval ");
841 unsigned_relts_print(ndo,
844 if (GET_BE_U_2(bp + 2) != 0) {
845 ND_PRINT(" ?0x%04x?",
851 case PIMV2_HELLO_OPTION_BIDIR_CAP:
854 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
855 case PIMV2_HELLO_OPTION_ADDRESS_LIST:
856 if (ndo->ndo_vflag > 1) {
857 const u_char *ptr = bp;
859 while (ptr < (bp+olen)) {
861 advance = pimv2_addr_print(ndo, ptr, plen, pimv2_unicast, pimv2_addr_len, 0);
870 if (ndo->ndo_vflag <= 1)
871 print_unknown_data(ndo, bp, "\n\t ", olen);
874 /* do we want to see an additionally hexdump ? */
875 if (ndo->ndo_vflag> 1)
876 print_unknown_data(ndo, bp, "\n\t ", olen);
883 case PIMV2_TYPE_REGISTER:
889 ND_TCHECK_LEN(bp, PIMV2_REGISTER_FLAG_LEN);
891 ND_PRINT(", Flags [ %s ]\n\t",
892 tok2str(pimv2_register_flag_values,
897 /* encapsulated multicast packet */
900 ip = (const struct ip *)bp;
902 case 0: /* Null header */
903 ND_PRINT("IP-Null-header %s > %s",
904 GET_IPADDR_STRING(ip->ip_src),
905 GET_IPADDR_STRING(ip->ip_dst));
909 ip_print(ndo, bp, len);
913 ip6_print(ndo, bp, len);
917 ND_PRINT("IP ver %u", IP_V(ip));
923 case PIMV2_TYPE_REGISTER_STOP:
925 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
927 bp += advance; len -= advance;
928 ND_PRINT(" source=");
929 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
931 bp += advance; len -= advance;
934 case PIMV2_TYPE_JOIN_PRUNE:
935 case PIMV2_TYPE_GRAFT:
936 case PIMV2_TYPE_GRAFT_ACK:
941 * 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
942 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
943 * |PIM Ver| Type | Addr length | Checksum |
944 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
945 * | Unicast-Upstream Neighbor Address |
946 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
947 * | Reserved | Num groups | Holdtime |
948 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
949 * | Encoded-Multicast Group Address-1 |
950 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
951 * | Number of Joined Sources | Number of Pruned Sources |
952 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
953 * | Encoded-Joined Source Address-1 |
954 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
957 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
958 * | Encoded-Joined Source Address-n |
959 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
960 * | Encoded-Pruned Source Address-1 |
961 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
964 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
965 * | Encoded-Pruned Source Address-n |
966 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
969 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
970 * | Encoded-Multicast Group Address-n |
971 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
981 if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/
982 ND_PRINT(", upstream-neighbor: ");
983 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
985 bp += advance; len -= advance;
990 ngroup = GET_U_1(bp + 1);
991 holdtime = GET_BE_U_2(bp + 2);
992 ND_PRINT("\n\t %u group(s)", ngroup);
993 if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/
994 ND_PRINT(", holdtime: ");
995 if (holdtime == 0xffff)
996 ND_PRINT("infinite");
998 unsigned_relts_print(ndo, holdtime);
1001 for (i = 0; i < ngroup; i++) {
1002 ND_PRINT("\n\t group #%u: ", i+1);
1003 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1005 bp += advance; len -= advance;
1009 njoin = GET_BE_U_2(bp);
1010 nprune = GET_BE_U_2(bp + 2);
1011 ND_PRINT(", joined sources: %u, pruned sources: %u", njoin, nprune);
1013 for (j = 0; j < njoin; j++) {
1014 ND_PRINT("\n\t joined source #%u: ", j+1);
1015 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0)
1017 bp += advance; len -= advance;
1019 for (j = 0; j < nprune; j++) {
1020 ND_PRINT("\n\t pruned source #%u: ", j+1);
1021 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0)
1023 bp += advance; len -= advance;
1029 case PIMV2_TYPE_BOOTSTRAP:
1033 /* Fragment Tag, Hash Mask len, and BSR-priority */
1036 ND_PRINT(" tag=%x", GET_BE_U_2(bp));
1041 ND_PRINT(" hashmlen=%u", GET_U_1(bp));
1044 ND_TCHECK_1(bp + 2);
1045 ND_PRINT(" BSRprio=%u", GET_U_1(bp + 1));
1049 /* Encoded-Unicast-BSR-Address */
1051 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1056 for (i = 0; len > 0; i++) {
1057 /* Encoded-Group Address */
1058 ND_PRINT(" (group%u: ", i);
1059 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1064 /* RP-Count, Frag RP-Cnt, and rsvd */
1067 ND_PRINT(" RPcnt=%u", GET_U_1(bp));
1070 frpcnt = GET_U_1(bp + 1);
1071 ND_PRINT(" FRPcnt=%u", frpcnt);
1077 for (j = 0; j < frpcnt && len > 0; j++) {
1079 ND_PRINT(" RP%u=", j);
1080 if ((advance = pimv2_addr_print(ndo, bp, len,
1090 ND_PRINT(",holdtime=");
1091 unsigned_relts_print(ndo,
1095 ND_PRINT(",prio=%u", GET_U_1(bp + 2));
1105 case PIMV2_TYPE_ASSERT:
1106 ND_PRINT(" group=");
1107 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1109 bp += advance; len -= advance;
1111 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1113 bp += advance; len -= advance;
1117 if (GET_U_1(bp) & 0x80)
1119 ND_PRINT(" pref=%u", GET_BE_U_4(bp) & 0x7fffffff);
1120 ND_PRINT(" metric=%u", GET_BE_U_4(bp + 4));
1123 case PIMV2_TYPE_CANDIDATE_RP:
1127 /* Prefix-Cnt, Priority, and Holdtime */
1130 ND_PRINT(" prefix-cnt=%u", GET_U_1(bp));
1131 pfxcnt = GET_U_1(bp);
1134 ND_PRINT(" prio=%u", GET_U_1(bp + 1));
1137 ND_PRINT(" holdtime=");
1138 unsigned_relts_print(ndo, GET_BE_U_2(bp + 2));
1142 /* Encoded-Unicast-RP-Address */
1144 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1149 /* Encoded-Group Addresses */
1150 for (i = 0; i < pfxcnt && len > 0; i++) {
1151 ND_PRINT(" Group%u=", i);
1152 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1160 case PIMV2_TYPE_PRUNE_REFRESH:
1162 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1167 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
1171 ND_PRINT(" forwarder=");
1172 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
1179 unsigned_relts_print(ndo, GET_BE_U_2(bp));
1182 case PIMV2_TYPE_DF_ELECTION:
1183 subtype = PIM_SUBTYPE(GET_U_1(pim->pim_rsv));
1184 ND_PRINT("\n\t %s,", tok2str( pimv2_df_election_flag_values,
1185 "Unknown", subtype) );
1188 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) {
1193 ND_PRINT(" sender pref=%u", GET_BE_U_4(bp) );
1194 ND_PRINT(" sender metric=%u", GET_BE_U_4(bp + 4));
1200 case PIMV2_DF_ELECTION_BACKOFF:
1201 case PIMV2_DF_ELECTION_PASS:
1202 ND_PRINT("\n\t %s addr=", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype));
1203 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) {
1209 ND_PRINT(" %s pref=%u", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype), GET_BE_U_4(bp) );
1210 ND_PRINT(" %s metric=%u", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype), GET_BE_U_4(bp + 4));
1215 if (subtype == PIMV2_DF_ELECTION_BACKOFF) {
1216 ND_PRINT(" interval %dms", GET_BE_U_2(bp));
1226 ND_PRINT(" [type %u]", PIM_TYPE(pim_typever));
1233 nd_print_trunc(ndo);