print-pim.c revision 214478 
1/*
2 * Copyright (c) 1995, 1996
3 *	The Regents of the University of California.  All rights reserved.
4 *
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
16 * written permission.
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.
20 *
21 * $FreeBSD: head/contrib/tcpdump/print-pim.c 214478 2010-10-28 19:06:17Z rpaulo $
22 */
23
24#ifndef lint
25static const char rcsid[] _U_ =
26    "@(#) $Header: /tcpdump/master/tcpdump/print-pim.c,v 1.49 2006-02-13 01:31:35 hannes Exp $ (LBL)";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <tcpdump-stdinc.h>
34#include "interface.h"
35
36#define PIMV2_TYPE_HELLO         0
37#define PIMV2_TYPE_REGISTER      1
38#define PIMV2_TYPE_REGISTER_STOP 2
39#define PIMV2_TYPE_JOIN_PRUNE    3
40#define PIMV2_TYPE_BOOTSTRAP     4
41#define PIMV2_TYPE_ASSERT        5
42#define PIMV2_TYPE_GRAFT         6
43#define PIMV2_TYPE_GRAFT_ACK     7
44#define PIMV2_TYPE_CANDIDATE_RP  8
45#define PIMV2_TYPE_PRUNE_REFRESH 9
46
47static struct tok pimv2_type_values[] = {
48    { PIMV2_TYPE_HELLO,         "Hello" },
49    { PIMV2_TYPE_REGISTER,      "Register" },
50    { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
51    { PIMV2_TYPE_JOIN_PRUNE,    "Join / Prune" },
52    { PIMV2_TYPE_BOOTSTRAP,     "Bootstrap" },
53    { PIMV2_TYPE_ASSERT,        "Assert" },
54    { PIMV2_TYPE_GRAFT,         "Graft" },
55    { PIMV2_TYPE_GRAFT_ACK,     "Graft Acknowledgement" },
56    { PIMV2_TYPE_CANDIDATE_RP,  "Candidate RP Advertisement" },
57    { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
58    { 0, NULL}
59};
60
61#define PIMV2_HELLO_OPTION_HOLDTIME             1
62#define PIMV2_HELLO_OPTION_LANPRUNEDELAY        2
63#define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD     18
64#define PIMV2_HELLO_OPTION_DR_PRIORITY         19
65#define PIMV2_HELLO_OPTION_GENID               20
66#define PIMV2_HELLO_OPTION_REFRESH_CAP         21
67#define PIMV2_HELLO_OPTION_BIDIR_CAP           22
68#define PIMV2_HELLO_OPTION_ADDRESS_LIST        24
69#define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
70
71static struct tok pimv2_hello_option_values[] = {
72    { PIMV2_HELLO_OPTION_HOLDTIME,         "Hold Time" },
73    { PIMV2_HELLO_OPTION_LANPRUNEDELAY,    "LAN Prune Delay" },
74    { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD,  "DR Priority (Old)" },
75    { PIMV2_HELLO_OPTION_DR_PRIORITY,      "DR Priority" },
76    { PIMV2_HELLO_OPTION_GENID,            "Generation ID" },
77    { PIMV2_HELLO_OPTION_REFRESH_CAP,      "State Refresh Capability" },
78    { PIMV2_HELLO_OPTION_BIDIR_CAP,        "Bi-Directional Capability" },
79    { PIMV2_HELLO_OPTION_ADDRESS_LIST,     "Address List" },
80    { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
81    { 0, NULL}
82};
83
84#define PIMV2_REGISTER_FLAG_LEN      4
85#define PIMV2_REGISTER_FLAG_BORDER 0x80000000
86#define PIMV2_REGISTER_FLAG_NULL   0x40000000
87
88static struct tok pimv2_register_flag_values[] = {
89    { PIMV2_REGISTER_FLAG_BORDER, "Border" },
90    { PIMV2_REGISTER_FLAG_NULL, "Null" },
91    { 0, NULL}
92};
93
94/*
95 * XXX: We consider a case where IPv6 is not ready yet for portability,
96 * but PIM dependent defintions should be independent of IPv6...
97 */
98
99struct pim {
100	u_int8_t pim_typever;
101			/* upper 4bit: PIM version number; 2 for PIMv2 */
102			/* lower 4bit: the PIM message type, currently they are:
103			 * Hello, Register, Register-Stop, Join/Prune,
104			 * Bootstrap, Assert, Graft (PIM-DM only),
105			 * Graft-Ack (PIM-DM only), C-RP-Adv
106			 */
107#define PIM_VER(x)	(((x) & 0xf0) >> 4)
108#define PIM_TYPE(x)	((x) & 0x0f)
109	u_char  pim_rsv;	/* Reserved */
110	u_short	pim_cksum;	/* IP style check sum */
111};
112
113
114#include <stdio.h>
115#include <stdlib.h>
116
117#include "interface.h"
118#include "addrtoname.h"
119#include "extract.h"
120
121#include "ip.h"
122
123static void pimv2_print(register const u_char *bp, register u_int len, u_int cksum);
124
125static void
126pimv1_join_prune_print(register const u_char *bp, register u_int len)
127{
128	int maddrlen, addrlen, ngroups, njoin, nprune;
129	int njp;
130
131	/* If it's a single group and a single source, use 1-line output. */
132	if (TTEST2(bp[0], 30) && bp[11] == 1 &&
133	    ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
134		int hold;
135
136		(void)printf(" RPF %s ", ipaddr_string(bp));
137		hold = EXTRACT_16BITS(&bp[6]);
138		if (hold != 180) {
139			(void)printf("Hold ");
140			relts_print(hold);
141		}
142		(void)printf("%s (%s/%d, %s", njoin ? "Join" : "Prune",
143		ipaddr_string(&bp[26]), bp[25] & 0x3f,
144		ipaddr_string(&bp[12]));
145		if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
146			(void)printf("/%s", ipaddr_string(&bp[16]));
147		(void)printf(") %s%s %s",
148		    (bp[24] & 0x01) ? "Sparse" : "Dense",
149		    (bp[25] & 0x80) ? " WC" : "",
150		    (bp[25] & 0x40) ? "RP" : "SPT");
151		return;
152	}
153
154	TCHECK2(bp[0], sizeof(struct in_addr));
155	if (vflag > 1)
156		(void)printf("\n");
157	(void)printf(" Upstream Nbr: %s", ipaddr_string(bp));
158	TCHECK2(bp[6], 2);
159	if (vflag > 1)
160		(void)printf("\n");
161	(void)printf(" Hold time: ");
162	relts_print(EXTRACT_16BITS(&bp[6]));
163	if (vflag < 2)
164		return;
165	bp += 8;
166	len -= 8;
167
168	TCHECK2(bp[0], 4);
169	maddrlen = bp[1];
170	addrlen = bp[2];
171	ngroups = bp[3];
172	bp += 4;
173	len -= 4;
174	while (ngroups--) {
175		/*
176		 * XXX - does the address have length "addrlen" and the
177		 * mask length "maddrlen"?
178		 */
179		TCHECK2(bp[0], sizeof(struct in_addr));
180		(void)printf("\n\tGroup: %s", ipaddr_string(bp));
181		TCHECK2(bp[4], sizeof(struct in_addr));
182		if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
183			(void)printf("/%s", ipaddr_string(&bp[4]));
184		TCHECK2(bp[8], 4);
185		njoin = EXTRACT_16BITS(&bp[8]);
186		nprune = EXTRACT_16BITS(&bp[10]);
187		(void)printf(" joined: %d pruned: %d", njoin, nprune);
188		bp += 12;
189		len -= 12;
190		for (njp = 0; njp < (njoin + nprune); njp++) {
191			const char *type;
192
193			if (njp < njoin)
194				type = "Join ";
195			else
196				type = "Prune";
197			TCHECK2(bp[0], 6);
198			(void)printf("\n\t%s %s%s%s%s/%d", type,
199			    (bp[0] & 0x01) ? "Sparse " : "Dense ",
200			    (bp[1] & 0x80) ? "WC " : "",
201			    (bp[1] & 0x40) ? "RP " : "SPT ",
202			ipaddr_string(&bp[2]), bp[1] & 0x3f);
203			bp += 6;
204			len -= 6;
205		}
206	}
207	return;
208trunc:
209	(void)printf("[|pim]");
210	return;
211}
212
213void
214pimv1_print(register const u_char *bp, register u_int len)
215{
216	register const u_char *ep;
217	register u_char type;
218
219	ep = (const u_char *)snapend;
220	if (bp >= ep)
221		return;
222
223	TCHECK(bp[1]);
224	type = bp[1];
225
226	switch (type) {
227	case 0:
228		(void)printf(" Query");
229		if (TTEST(bp[8])) {
230			switch (bp[8] >> 4) {
231			case 0:
232				(void)printf(" Dense-mode");
233				break;
234			case 1:
235				(void)printf(" Sparse-mode");
236				break;
237			case 2:
238				(void)printf(" Sparse-Dense-mode");
239				break;
240			default:
241				(void)printf(" mode-%d", bp[8] >> 4);
242				break;
243			}
244		}
245		if (vflag) {
246			TCHECK2(bp[10],2);
247			(void)printf(" (Hold-time ");
248			relts_print(EXTRACT_16BITS(&bp[10]));
249			(void)printf(")");
250		}
251		break;
252
253	case 1:
254		(void)printf(" Register");
255		TCHECK2(bp[8], 20);			/* ip header */
256		(void)printf(" for %s > %s", ipaddr_string(&bp[20]),
257		    ipaddr_string(&bp[24]));
258		break;
259	case 2:
260		(void)printf(" Register-Stop");
261		TCHECK2(bp[12], sizeof(struct in_addr));
262		(void)printf(" for %s > %s", ipaddr_string(&bp[8]),
263		    ipaddr_string(&bp[12]));
264		break;
265	case 3:
266		(void)printf(" Join/Prune");
267		if (vflag)
268			pimv1_join_prune_print(&bp[8], len - 8);
269		break;
270	case 4:
271		(void)printf(" RP-reachable");
272		if (vflag) {
273			TCHECK2(bp[22], 2);
274			(void)printf(" group %s",
275			ipaddr_string(&bp[8]));
276			if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
277				(void)printf("/%s", ipaddr_string(&bp[12]));
278			(void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
279			relts_print(EXTRACT_16BITS(&bp[22]));
280		}
281		break;
282	case 5:
283		(void)printf(" Assert");
284		TCHECK2(bp[16], sizeof(struct in_addr));
285		(void)printf(" for %s > %s", ipaddr_string(&bp[16]),
286		    ipaddr_string(&bp[8]));
287		if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
288			(void)printf("/%s", ipaddr_string(&bp[12]));
289		TCHECK2(bp[24], 4);
290		(void)printf(" %s pref %d metric %d",
291		    (bp[20] & 0x80) ? "RP-tree" : "SPT",
292		EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
293		EXTRACT_32BITS(&bp[24]));
294		break;
295	case 6:
296		(void)printf(" Graft");
297		if (vflag)
298			pimv1_join_prune_print(&bp[8], len - 8);
299		break;
300	case 7:
301		(void)printf(" Graft-ACK");
302		if (vflag)
303			pimv1_join_prune_print(&bp[8], len - 8);
304		break;
305	case 8:
306		(void)printf(" Mode");
307		break;
308	default:
309		(void)printf(" [type %d]", type);
310		break;
311	}
312	if ((bp[4] >> 4) != 1)
313		(void)printf(" [v%d]", bp[4] >> 4);
314	return;
315
316trunc:
317	(void)printf("[|pim]");
318	return;
319}
320
321/*
322 * auto-RP is a cisco protocol, documented at
323 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
324 *
325 * This implements version 1+, dated Sept 9, 1998.
326 */
327void
328cisco_autorp_print(register const u_char *bp, register u_int len)
329{
330	int type;
331	int numrps;
332	int hold;
333
334	TCHECK(bp[0]);
335	(void)printf(" auto-rp ");
336	type = bp[0];
337	switch (type) {
338	case 0x11:
339		(void)printf("candidate-advert");
340		break;
341	case 0x12:
342		(void)printf("mapping");
343		break;
344	default:
345		(void)printf("type-0x%02x", type);
346		break;
347	}
348
349	TCHECK(bp[1]);
350	numrps = bp[1];
351
352	TCHECK2(bp[2], 2);
353	(void)printf(" Hold ");
354	hold = EXTRACT_16BITS(&bp[2]);
355	if (hold)
356		relts_print(EXTRACT_16BITS(&bp[2]));
357	else
358		printf("FOREVER");
359
360	/* Next 4 bytes are reserved. */
361
362	bp += 8; len -= 8;
363
364	/*XXX skip unless -v? */
365
366	/*
367	 * Rest of packet:
368	 * numrps entries of the form:
369	 * 32 bits: RP
370	 * 6 bits: reserved
371	 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
372	 * 8 bits: # of entries for this RP
373	 * each entry: 7 bits: reserved, 1 bit: negative,
374	 *	       8 bits: mask 32 bits: source
375	 * lather, rinse, repeat.
376	 */
377	while (numrps--) {
378		int nentries;
379		char s;
380
381		TCHECK2(bp[0], 4);
382		(void)printf(" RP %s", ipaddr_string(bp));
383		TCHECK(bp[4]);
384		switch (bp[4] & 0x3) {
385		case 0: printf(" PIMv?");
386			break;
387		case 1:	printf(" PIMv1");
388			break;
389		case 2:	printf(" PIMv2");
390			break;
391		case 3:	printf(" PIMv1+2");
392			break;
393		}
394		if (bp[4] & 0xfc)
395			(void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
396		TCHECK(bp[5]);
397		nentries = bp[5];
398		bp += 6; len -= 6;
399		s = ' ';
400		for (; nentries; nentries--) {
401			TCHECK2(bp[0], 6);
402			(void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
403			    ipaddr_string(&bp[2]), bp[1]);
404			if (bp[0] & 0xfe)
405				(void)printf("[rsvd=0x%02x]", bp[0] & 0xfe);
406			s = ',';
407			bp += 6; len -= 6;
408		}
409	}
410	return;
411
412trunc:
413	(void)printf("[|autorp]");
414	return;
415}
416
417void
418pim_print(register const u_char *bp, register u_int len, u_int cksum)
419{
420	register const u_char *ep;
421	register struct pim *pim = (struct pim *)bp;
422
423	ep = (const u_char *)snapend;
424	if (bp >= ep)
425		return;
426#ifdef notyet			/* currently we see only version and type */
427	TCHECK(pim->pim_rsv);
428#endif
429
430	switch (PIM_VER(pim->pim_typever)) {
431	case 2:
432            if (!vflag) {
433                printf("PIMv%u, %s, length %u",
434                       PIM_VER(pim->pim_typever),
435                       tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
436                       len);
437                return;
438            } else {
439                printf("PIMv%u, length %u\n\t%s",
440                       PIM_VER(pim->pim_typever),
441                       len,
442                       tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)));
443                pimv2_print(bp, len, cksum);
444            }
445            break;
446	default:
447		printf("PIMv%u, length %u",
448                       PIM_VER(pim->pim_typever),
449                       len);
450		break;
451	}
452	return;
453}
454
455/*
456 * PIMv2 uses encoded address representations.
457 *
458 * The last PIM-SM I-D before RFC2117 was published specified the
459 * following representation for unicast addresses.  However, RFC2117
460 * specified no encoding for unicast addresses with the unicast
461 * address length specified in the header.  Therefore, we have to
462 * guess which encoding is being used (Cisco's PIMv2 implementation
463 * uses the non-RFC encoding).  RFC2117 turns a previously "Reserved"
464 * field into a 'unicast-address-length-in-bytes' field.  We guess
465 * that it's the draft encoding if this reserved field is zero.
466 *
467 * RFC2362 goes back to the encoded format, and calls the addr length
468 * field "reserved" again.
469 *
470 * The first byte is the address family, from:
471 *
472 *    0    Reserved
473 *    1    IP (IP version 4)
474 *    2    IP6 (IP version 6)
475 *    3    NSAP
476 *    4    HDLC (8-bit multidrop)
477 *    5    BBN 1822
478 *    6    802 (includes all 802 media plus Ethernet "canonical format")
479 *    7    E.163
480 *    8    E.164 (SMDS, Frame Relay, ATM)
481 *    9    F.69 (Telex)
482 *   10    X.121 (X.25, Frame Relay)
483 *   11    IPX
484 *   12    Appletalk
485 *   13    Decnet IV
486 *   14    Banyan Vines
487 *   15    E.164 with NSAP format subaddress
488 *
489 * In addition, the second byte is an "Encoding".  0 is the default
490 * encoding for the address family, and no other encodings are currently
491 * specified.
492 *
493 */
494
495static int pimv2_addr_len;
496
497enum pimv2_addrtype {
498	pimv2_unicast, pimv2_group, pimv2_source
499};
500
501/*  0                   1                   2                   3
502 *  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
503 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
504 * | Addr Family   | Encoding Type |     Unicast Address           |
505 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
506 *  0                   1                   2                   3
507 *  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
508 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
509 * | Addr Family   | Encoding Type |   Reserved    |  Mask Len     |
510 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
511 * |                Group multicast Address                        |
512 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
513 *  0                   1                   2                   3
514 *  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
515 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
516 * | Addr Family   | Encoding Type | Rsrvd   |S|W|R|  Mask Len     |
517 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
518 * |                        Source Address                         |
519 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
520 */
521static int
522pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
523{
524	int af;
525	int len, hdrlen;
526
527	TCHECK(bp[0]);
528
529	if (pimv2_addr_len == 0) {
530		TCHECK(bp[1]);
531		switch (bp[0]) {
532		case 1:
533			af = AF_INET;
534			len = sizeof(struct in_addr);
535			break;
536#ifdef INET6
537		case 2:
538			af = AF_INET6;
539			len = sizeof(struct in6_addr);
540			break;
541#endif
542		default:
543			return -1;
544		}
545		if (bp[1] != 0)
546			return -1;
547		hdrlen = 2;
548	} else {
549		switch (pimv2_addr_len) {
550		case sizeof(struct in_addr):
551			af = AF_INET;
552			break;
553#ifdef INET6
554		case sizeof(struct in6_addr):
555			af = AF_INET6;
556			break;
557#endif
558		default:
559			return -1;
560			break;
561		}
562		len = pimv2_addr_len;
563		hdrlen = 0;
564	}
565
566	bp += hdrlen;
567	switch (at) {
568	case pimv2_unicast:
569		TCHECK2(bp[0], len);
570		if (af == AF_INET) {
571			if (!silent)
572				(void)printf("%s", ipaddr_string(bp));
573		}
574#ifdef INET6
575		else if (af == AF_INET6) {
576			if (!silent)
577				(void)printf("%s", ip6addr_string(bp));
578		}
579#endif
580		return hdrlen + len;
581	case pimv2_group:
582	case pimv2_source:
583		TCHECK2(bp[0], len + 2);
584		if (af == AF_INET) {
585			if (!silent) {
586				(void)printf("%s", ipaddr_string(bp + 2));
587				if (bp[1] != 32)
588					(void)printf("/%u", bp[1]);
589			}
590		}
591#ifdef INET6
592		else if (af == AF_INET6) {
593			if (!silent) {
594				(void)printf("%s", ip6addr_string(bp + 2));
595				if (bp[1] != 128)
596					(void)printf("/%u", bp[1]);
597			}
598		}
599#endif
600		if (bp[0] && !silent) {
601			if (at == pimv2_group) {
602				(void)printf("(0x%02x)", bp[0]);
603			} else {
604				(void)printf("(%s%s%s",
605					bp[0] & 0x04 ? "S" : "",
606					bp[0] & 0x02 ? "W" : "",
607					bp[0] & 0x01 ? "R" : "");
608				if (bp[0] & 0xf8) {
609					(void) printf("+0x%02x", bp[0] & 0xf8);
610				}
611				(void)printf(")");
612			}
613		}
614		return hdrlen + 2 + len;
615	default:
616		return -1;
617	}
618trunc:
619	return -1;
620}
621
622static void
623pimv2_print(register const u_char *bp, register u_int len, u_int cksum)
624{
625	register const u_char *ep;
626	register struct pim *pim = (struct pim *)bp;
627	int advance;
628
629	ep = (const u_char *)snapend;
630	if (bp >= ep)
631		return;
632	if (ep > bp + len)
633		ep = bp + len;
634	TCHECK(pim->pim_rsv);
635	pimv2_addr_len = pim->pim_rsv;
636	if (pimv2_addr_len != 0)
637		(void)printf(", RFC2117-encoding");
638
639        printf(", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum));
640        if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
641                printf("(unverified)");
642        } else {
643                printf("(%scorrect)", TTEST2(bp[0], len) && cksum ? "in" : "" );
644        }
645
646	switch (PIM_TYPE(pim->pim_typever)) {
647	case PIMV2_TYPE_HELLO:
648	    {
649		u_int16_t otype, olen;
650		bp += 4;
651		while (bp < ep) {
652			TCHECK2(bp[0], 4);
653			otype = EXTRACT_16BITS(&bp[0]);
654			olen = EXTRACT_16BITS(&bp[2]);
655			TCHECK2(bp[0], 4 + olen);
656
657                        printf("\n\t  %s Option (%u), length %u, Value: ",
658                               tok2str( pimv2_hello_option_values,"Unknown",otype),
659                               otype,
660                               olen);
661			bp += 4;
662
663			switch (otype) {
664			case PIMV2_HELLO_OPTION_HOLDTIME:
665                                relts_print(EXTRACT_16BITS(bp));
666                                break;
667
668			case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
669				if (olen != 4) {
670					(void)printf("ERROR: Option Lenght != 4 Bytes (%u)", olen);
671				} else {
672					char t_bit;
673					u_int16_t lan_delay, override_interval;
674					lan_delay = EXTRACT_16BITS(bp);
675					override_interval = EXTRACT_16BITS(bp+2);
676					t_bit = (lan_delay & 0x8000)? 1 : 0;
677					lan_delay &= ~0x8000;
678					(void)printf("\n\t    T-bit=%d, LAN delay %dms, Override interval %dms",
679					t_bit, lan_delay, override_interval);
680				}
681				break;
682
683			case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
684			case PIMV2_HELLO_OPTION_DR_PRIORITY:
685                                switch (olen) {
686                                case 0:
687                                    printf("Bi-Directional Capability (Old)");
688                                    break;
689                                case 4:
690                                    printf("%u", EXTRACT_32BITS(bp));
691                                    break;
692                                default:
693                                    printf("ERROR: Option Lenght != 4 Bytes (%u)", olen);
694                                    break;
695                                }
696                                break;
697
698			case PIMV2_HELLO_OPTION_GENID:
699                                (void)printf("0x%08x", EXTRACT_32BITS(bp));
700				break;
701
702			case PIMV2_HELLO_OPTION_REFRESH_CAP:
703                                (void)printf("v%d", *bp);
704				if (*(bp+1) != 0) {
705                                    (void)printf(", interval ");
706                                    relts_print(*(bp+1));
707				}
708				if (EXTRACT_16BITS(bp+2) != 0) {
709                                    (void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
710				}
711				break;
712
713			case  PIMV2_HELLO_OPTION_BIDIR_CAP:
714				break;
715
716                        case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
717                        case PIMV2_HELLO_OPTION_ADDRESS_LIST:
718				if (vflag > 1) {
719					const u_char *ptr = bp;
720					while (ptr < (bp+olen)) {
721						int advance;
722
723						printf("\n\t    ");
724						advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
725						if (advance < 0) {
726							printf("...");
727							break;
728						}
729						ptr += advance;
730					}
731				}
732				break;
733			default:
734                                if (vflag <= 1)
735                                    print_unknown_data(bp,"\n\t    ",olen);
736                                break;
737			}
738                        /* do we want to see an additionally hexdump ? */
739                        if (vflag> 1)
740                            print_unknown_data(bp,"\n\t    ",olen);
741			bp += olen;
742		}
743		break;
744	    }
745
746	case PIMV2_TYPE_REGISTER:
747	{
748		struct ip *ip;
749
750                if (!TTEST2(*(bp+4), PIMV2_REGISTER_FLAG_LEN))
751                        goto trunc;
752
753                printf(", Flags [ %s ]\n\t",
754                       tok2str(pimv2_register_flag_values,
755                               "none",
756                               EXTRACT_32BITS(bp+4)));
757
758		bp += 8; len -= 8;
759		/* encapsulated multicast packet */
760		ip = (struct ip *)bp;
761		switch (IP_V(ip)) {
762                case 0: /* Null header */
763			(void)printf("IP-Null-header %s > %s",
764                                     ipaddr_string(&ip->ip_src),
765                                     ipaddr_string(&ip->ip_dst));
766			break;
767
768		case 4:	/* IPv4 */
769			ip_print(gndo, bp, len);
770			break;
771#ifdef INET6
772		case 6:	/* IPv6 */
773			ip6_print(bp, len);
774			break;
775#endif
776                default:
777                        (void)printf("IP ver %d", IP_V(ip));
778                        break;
779		}
780		break;
781	}
782
783	case PIMV2_TYPE_REGISTER_STOP:
784		bp += 4; len -= 4;
785		if (bp >= ep)
786			break;
787		(void)printf(" group=");
788		if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
789			(void)printf("...");
790			break;
791		}
792		bp += advance; len -= advance;
793		if (bp >= ep)
794			break;
795		(void)printf(" source=");
796		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
797			(void)printf("...");
798			break;
799		}
800		bp += advance; len -= advance;
801		break;
802
803	case PIMV2_TYPE_JOIN_PRUNE:
804	case PIMV2_TYPE_GRAFT:
805	case PIMV2_TYPE_GRAFT_ACK:
806
807
808        /*
809         * 0                   1                   2                   3
810         *   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
811         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
812         *  |PIM Ver| Type  | Addr length   |           Checksum            |
813         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
814         *  |             Unicast-Upstream Neighbor Address                 |
815         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
816         *  |  Reserved     | Num groups    |          Holdtime             |
817         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
818         *  |            Encoded-Multicast Group Address-1                  |
819         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
820         *  |   Number of Joined  Sources   |   Number of Pruned Sources    |
821         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
822         *  |               Encoded-Joined Source Address-1                 |
823         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
824         *  |                             .                                 |
825         *  |                             .                                 |
826         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
827         *  |               Encoded-Joined Source Address-n                 |
828         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
829         *  |               Encoded-Pruned Source Address-1                 |
830         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
831         *  |                             .                                 |
832         *  |                             .                                 |
833         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
834         *  |               Encoded-Pruned Source Address-n                 |
835         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
836         *  |                           .                                   |
837         *  |                           .                                   |
838         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
839         *  |                Encoded-Multicast Group Address-n              |
840         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
841         */
842
843	    {
844		u_int8_t ngroup;
845		u_int16_t holdtime;
846		u_int16_t njoin;
847		u_int16_t nprune;
848		int i, j;
849
850		bp += 4; len -= 4;
851		if (PIM_TYPE(pim->pim_typever) != 7) {	/*not for Graft-ACK*/
852			if (bp >= ep)
853				break;
854			(void)printf(", upstream-neighbor: ");
855			if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
856				(void)printf("...");
857				break;
858			}
859			bp += advance; len -= advance;
860		}
861		if (bp + 4 > ep)
862			break;
863		ngroup = bp[1];
864		holdtime = EXTRACT_16BITS(&bp[2]);
865		(void)printf("\n\t  %u group(s)", ngroup);
866		if (PIM_TYPE(pim->pim_typever) != 7) {	/*not for Graft-ACK*/
867			(void)printf(", holdtime: ");
868			if (holdtime == 0xffff)
869				(void)printf("infinite");
870			else
871				relts_print(holdtime);
872		}
873		bp += 4; len -= 4;
874		for (i = 0; i < ngroup; i++) {
875			if (bp >= ep)
876				goto jp_done;
877			(void)printf("\n\t    group #%u: ", i+1);
878			if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
879				(void)printf("...)");
880				goto jp_done;
881			}
882			bp += advance; len -= advance;
883			if (bp + 4 > ep) {
884				(void)printf("...)");
885				goto jp_done;
886			}
887			njoin = EXTRACT_16BITS(&bp[0]);
888			nprune = EXTRACT_16BITS(&bp[2]);
889			(void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
890			bp += 4; len -= 4;
891			for (j = 0; j < njoin; j++) {
892				(void)printf("\n\t      joined source #%u: ",j+1);
893				if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
894					(void)printf("...)");
895					goto jp_done;
896				}
897				bp += advance; len -= advance;
898			}
899			for (j = 0; j < nprune; j++) {
900				(void)printf("\n\t      pruned source #%u: ",j+1);
901				if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
902					(void)printf("...)");
903					goto jp_done;
904				}
905				bp += advance; len -= advance;
906			}
907		}
908	jp_done:
909		break;
910	    }
911
912	case PIMV2_TYPE_BOOTSTRAP:
913	{
914		int i, j, frpcnt;
915		bp += 4;
916
917		/* Fragment Tag, Hash Mask len, and BSR-priority */
918		if (bp + sizeof(u_int16_t) >= ep) break;
919		(void)printf(" tag=%x", EXTRACT_16BITS(bp));
920		bp += sizeof(u_int16_t);
921		if (bp >= ep) break;
922		(void)printf(" hashmlen=%d", bp[0]);
923		if (bp + 1 >= ep) break;
924		(void)printf(" BSRprio=%d", bp[1]);
925		bp += 2;
926
927		/* Encoded-Unicast-BSR-Address */
928		if (bp >= ep) break;
929		(void)printf(" BSR=");
930		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
931			(void)printf("...");
932			break;
933		}
934		bp += advance;
935
936		for (i = 0; bp < ep; i++) {
937			/* Encoded-Group Address */
938			(void)printf(" (group%d: ", i);
939			if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
940			    < 0) {
941				(void)printf("...)");
942				goto bs_done;
943			}
944			bp += advance;
945
946			/* RP-Count, Frag RP-Cnt, and rsvd */
947			if (bp >= ep) {
948				(void)printf("...)");
949				goto bs_done;
950			}
951			(void)printf(" RPcnt=%d", bp[0]);
952			if (bp + 1 >= ep) {
953				(void)printf("...)");
954				goto bs_done;
955			}
956			(void)printf(" FRPcnt=%d", frpcnt = bp[1]);
957			bp += 4;
958
959			for (j = 0; j < frpcnt && bp < ep; j++) {
960				/* each RP info */
961				(void)printf(" RP%d=", j);
962				if ((advance = pimv2_addr_print(bp,
963								pimv2_unicast,
964								0)) < 0) {
965					(void)printf("...)");
966					goto bs_done;
967				}
968				bp += advance;
969
970				if (bp + 1 >= ep) {
971					(void)printf("...)");
972					goto bs_done;
973				}
974				(void)printf(",holdtime=");
975				relts_print(EXTRACT_16BITS(bp));
976				if (bp + 2 >= ep) {
977					(void)printf("...)");
978					goto bs_done;
979				}
980				(void)printf(",prio=%d", bp[2]);
981				bp += 4;
982			}
983			(void)printf(")");
984		}
985	   bs_done:
986		break;
987	}
988	case PIMV2_TYPE_ASSERT:
989		bp += 4; len -= 4;
990		if (bp >= ep)
991			break;
992		(void)printf(" group=");
993		if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
994			(void)printf("...");
995			break;
996		}
997		bp += advance; len -= advance;
998		if (bp >= ep)
999			break;
1000		(void)printf(" src=");
1001		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1002			(void)printf("...");
1003			break;
1004		}
1005		bp += advance; len -= advance;
1006		if (bp + 8 > ep)
1007			break;
1008		if (bp[0] & 0x80)
1009			(void)printf(" RPT");
1010		(void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
1011		(void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
1012		break;
1013
1014	case PIMV2_TYPE_CANDIDATE_RP:
1015	{
1016		int i, pfxcnt;
1017		bp += 4;
1018
1019		/* Prefix-Cnt, Priority, and Holdtime */
1020		if (bp >= ep) break;
1021		(void)printf(" prefix-cnt=%d", bp[0]);
1022		pfxcnt = bp[0];
1023		if (bp + 1 >= ep) break;
1024		(void)printf(" prio=%d", bp[1]);
1025		if (bp + 3 >= ep) break;
1026		(void)printf(" holdtime=");
1027		relts_print(EXTRACT_16BITS(&bp[2]));
1028		bp += 4;
1029
1030		/* Encoded-Unicast-RP-Address */
1031		if (bp >= ep) break;
1032		(void)printf(" RP=");
1033		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1034			(void)printf("...");
1035			break;
1036		}
1037		bp += advance;
1038
1039		/* Encoded-Group Addresses */
1040		for (i = 0; i < pfxcnt && bp < ep; i++) {
1041			(void)printf(" Group%d=", i);
1042			if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
1043			    < 0) {
1044				(void)printf("...");
1045				break;
1046			}
1047			bp += advance;
1048		}
1049		break;
1050	}
1051
1052	case PIMV2_TYPE_PRUNE_REFRESH:
1053		(void)printf(" src=");
1054		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1055			(void)printf("...");
1056			break;
1057		}
1058		bp += advance;
1059		(void)printf(" grp=");
1060		if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
1061			(void)printf("...");
1062			break;
1063		}
1064		bp += advance;
1065		(void)printf(" forwarder=");
1066		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1067			(void)printf("...");
1068			break;
1069		}
1070		bp += advance;
1071		TCHECK2(bp[0], 2);
1072		(void)printf(" TUNR ");
1073		relts_print(EXTRACT_16BITS(bp));
1074		break;
1075
1076
1077	 default:
1078		(void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
1079		break;
1080	}
1081
1082	return;
1083
1084trunc:
1085	(void)printf("[|pim]");
1086}
1087
1088/*
1089 * Local Variables:
1090 * c-style: whitesmith
1091 * c-basic-offset: 8
1092 * End:
1093 */
1094