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 * $FreeBSD$
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
35#include <stdio.h>
36#include <stdlib.h>
37
38#include "interface.h"
39#include "addrtoname.h"
40#include "extract.h"
41
42#include "ip.h"
43
44#define PIMV2_TYPE_HELLO         0
45#define PIMV2_TYPE_REGISTER      1
46#define PIMV2_TYPE_REGISTER_STOP 2
47#define PIMV2_TYPE_JOIN_PRUNE    3
48#define PIMV2_TYPE_BOOTSTRAP     4
49#define PIMV2_TYPE_ASSERT        5
50#define PIMV2_TYPE_GRAFT         6
51#define PIMV2_TYPE_GRAFT_ACK     7
52#define PIMV2_TYPE_CANDIDATE_RP  8
53#define PIMV2_TYPE_PRUNE_REFRESH 9
54
55static struct tok pimv2_type_values[] = {
56    { PIMV2_TYPE_HELLO,         "Hello" },
57    { PIMV2_TYPE_REGISTER,      "Register" },
58    { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
59    { PIMV2_TYPE_JOIN_PRUNE,    "Join / Prune" },
60    { PIMV2_TYPE_BOOTSTRAP,     "Bootstrap" },
61    { PIMV2_TYPE_ASSERT,        "Assert" },
62    { PIMV2_TYPE_GRAFT,         "Graft" },
63    { PIMV2_TYPE_GRAFT_ACK,     "Graft Acknowledgement" },
64    { PIMV2_TYPE_CANDIDATE_RP,  "Candidate RP Advertisement" },
65    { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
66    { 0, NULL}
67};
68
69#define PIMV2_HELLO_OPTION_HOLDTIME             1
70#define PIMV2_HELLO_OPTION_LANPRUNEDELAY        2
71#define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD     18
72#define PIMV2_HELLO_OPTION_DR_PRIORITY         19
73#define PIMV2_HELLO_OPTION_GENID               20
74#define PIMV2_HELLO_OPTION_REFRESH_CAP         21
75#define PIMV2_HELLO_OPTION_BIDIR_CAP           22
76#define PIMV2_HELLO_OPTION_ADDRESS_LIST        24
77#define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
78
79static struct tok pimv2_hello_option_values[] = {
80    { PIMV2_HELLO_OPTION_HOLDTIME,         "Hold Time" },
81    { PIMV2_HELLO_OPTION_LANPRUNEDELAY,    "LAN Prune Delay" },
82    { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD,  "DR Priority (Old)" },
83    { PIMV2_HELLO_OPTION_DR_PRIORITY,      "DR Priority" },
84    { PIMV2_HELLO_OPTION_GENID,            "Generation ID" },
85    { PIMV2_HELLO_OPTION_REFRESH_CAP,      "State Refresh Capability" },
86    { PIMV2_HELLO_OPTION_BIDIR_CAP,        "Bi-Directional Capability" },
87    { PIMV2_HELLO_OPTION_ADDRESS_LIST,     "Address List" },
88    { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
89    { 0, NULL}
90};
91
92#define PIMV2_REGISTER_FLAG_LEN      4
93#define PIMV2_REGISTER_FLAG_BORDER 0x80000000
94#define PIMV2_REGISTER_FLAG_NULL   0x40000000
95
96static struct tok pimv2_register_flag_values[] = {
97    { PIMV2_REGISTER_FLAG_BORDER, "Border" },
98    { PIMV2_REGISTER_FLAG_NULL, "Null" },
99    { 0, NULL}
100};
101
102/*
103 * XXX: We consider a case where IPv6 is not ready yet for portability,
104 * but PIM dependent defintions should be independent of IPv6...
105 */
106
107struct pim {
108	u_int8_t pim_typever;
109			/* upper 4bit: PIM version number; 2 for PIMv2 */
110			/* lower 4bit: the PIM message type, currently they are:
111			 * Hello, Register, Register-Stop, Join/Prune,
112			 * Bootstrap, Assert, Graft (PIM-DM only),
113			 * Graft-Ack (PIM-DM only), C-RP-Adv
114			 */
115#define PIM_VER(x)	(((x) & 0xf0) >> 4)
116#define PIM_TYPE(x)	((x) & 0x0f)
117	u_char  pim_rsv;	/* Reserved */
118	u_short	pim_cksum;	/* IP style check sum */
119};
120
121static void pimv2_print(register const u_char *bp, register u_int len, u_int cksum);
122
123static void
124pimv1_join_prune_print(register const u_char *bp, register u_int len)
125{
126	int maddrlen, addrlen, ngroups, njoin, nprune;
127	int njp;
128
129	/* If it's a single group and a single source, use 1-line output. */
130	if (TTEST2(bp[0], 30) && bp[11] == 1 &&
131	    ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
132		int hold;
133
134		(void)printf(" RPF %s ", ipaddr_string(bp));
135		hold = EXTRACT_16BITS(&bp[6]);
136		if (hold != 180) {
137			(void)printf("Hold ");
138			relts_print(hold);
139		}
140		(void)printf("%s (%s/%d, %s", njoin ? "Join" : "Prune",
141		ipaddr_string(&bp[26]), bp[25] & 0x3f,
142		ipaddr_string(&bp[12]));
143		if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
144			(void)printf("/%s", ipaddr_string(&bp[16]));
145		(void)printf(") %s%s %s",
146		    (bp[24] & 0x01) ? "Sparse" : "Dense",
147		    (bp[25] & 0x80) ? " WC" : "",
148		    (bp[25] & 0x40) ? "RP" : "SPT");
149		return;
150	}
151
152	TCHECK2(bp[0], sizeof(struct in_addr));
153	if (vflag > 1)
154		(void)printf("\n");
155	(void)printf(" Upstream Nbr: %s", ipaddr_string(bp));
156	TCHECK2(bp[6], 2);
157	if (vflag > 1)
158		(void)printf("\n");
159	(void)printf(" Hold time: ");
160	relts_print(EXTRACT_16BITS(&bp[6]));
161	if (vflag < 2)
162		return;
163	bp += 8;
164	len -= 8;
165
166	TCHECK2(bp[0], 4);
167	maddrlen = bp[1];
168	addrlen = bp[2];
169	ngroups = bp[3];
170	bp += 4;
171	len -= 4;
172	while (ngroups--) {
173		/*
174		 * XXX - does the address have length "addrlen" and the
175		 * mask length "maddrlen"?
176		 */
177		TCHECK2(bp[0], sizeof(struct in_addr));
178		(void)printf("\n\tGroup: %s", ipaddr_string(bp));
179		TCHECK2(bp[4], sizeof(struct in_addr));
180		if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
181			(void)printf("/%s", ipaddr_string(&bp[4]));
182		TCHECK2(bp[8], 4);
183		njoin = EXTRACT_16BITS(&bp[8]);
184		nprune = EXTRACT_16BITS(&bp[10]);
185		(void)printf(" joined: %d pruned: %d", njoin, nprune);
186		bp += 12;
187		len -= 12;
188		for (njp = 0; njp < (njoin + nprune); njp++) {
189			const char *type;
190
191			if (njp < njoin)
192				type = "Join ";
193			else
194				type = "Prune";
195			TCHECK2(bp[0], 6);
196			(void)printf("\n\t%s %s%s%s%s/%d", type,
197			    (bp[0] & 0x01) ? "Sparse " : "Dense ",
198			    (bp[1] & 0x80) ? "WC " : "",
199			    (bp[1] & 0x40) ? "RP " : "SPT ",
200			ipaddr_string(&bp[2]), bp[1] & 0x3f);
201			bp += 6;
202			len -= 6;
203		}
204	}
205	return;
206trunc:
207	(void)printf("[|pim]");
208	return;
209}
210
211void
212pimv1_print(register const u_char *bp, register u_int len)
213{
214	register const u_char *ep;
215	register u_char type;
216
217	ep = (const u_char *)snapend;
218	if (bp >= ep)
219		return;
220
221	TCHECK(bp[1]);
222	type = bp[1];
223
224	switch (type) {
225	case 0:
226		(void)printf(" Query");
227		if (TTEST(bp[8])) {
228			switch (bp[8] >> 4) {
229			case 0:
230				(void)printf(" Dense-mode");
231				break;
232			case 1:
233				(void)printf(" Sparse-mode");
234				break;
235			case 2:
236				(void)printf(" Sparse-Dense-mode");
237				break;
238			default:
239				(void)printf(" mode-%d", bp[8] >> 4);
240				break;
241			}
242		}
243		if (vflag) {
244			TCHECK2(bp[10],2);
245			(void)printf(" (Hold-time ");
246			relts_print(EXTRACT_16BITS(&bp[10]));
247			(void)printf(")");
248		}
249		break;
250
251	case 1:
252		(void)printf(" Register");
253		TCHECK2(bp[8], 20);			/* ip header */
254		(void)printf(" for %s > %s", ipaddr_string(&bp[20]),
255		    ipaddr_string(&bp[24]));
256		break;
257	case 2:
258		(void)printf(" Register-Stop");
259		TCHECK2(bp[12], sizeof(struct in_addr));
260		(void)printf(" for %s > %s", ipaddr_string(&bp[8]),
261		    ipaddr_string(&bp[12]));
262		break;
263	case 3:
264		(void)printf(" Join/Prune");
265		if (vflag)
266			pimv1_join_prune_print(&bp[8], len - 8);
267		break;
268	case 4:
269		(void)printf(" RP-reachable");
270		if (vflag) {
271			TCHECK2(bp[22], 2);
272			(void)printf(" group %s",
273			ipaddr_string(&bp[8]));
274			if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
275				(void)printf("/%s", ipaddr_string(&bp[12]));
276			(void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
277			relts_print(EXTRACT_16BITS(&bp[22]));
278		}
279		break;
280	case 5:
281		(void)printf(" Assert");
282		TCHECK2(bp[16], sizeof(struct in_addr));
283		(void)printf(" for %s > %s", ipaddr_string(&bp[16]),
284		    ipaddr_string(&bp[8]));
285		if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
286			(void)printf("/%s", ipaddr_string(&bp[12]));
287		TCHECK2(bp[24], 4);
288		(void)printf(" %s pref %d metric %d",
289		    (bp[20] & 0x80) ? "RP-tree" : "SPT",
290		EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
291		EXTRACT_32BITS(&bp[24]));
292		break;
293	case 6:
294		(void)printf(" Graft");
295		if (vflag)
296			pimv1_join_prune_print(&bp[8], len - 8);
297		break;
298	case 7:
299		(void)printf(" Graft-ACK");
300		if (vflag)
301			pimv1_join_prune_print(&bp[8], len - 8);
302		break;
303	case 8:
304		(void)printf(" Mode");
305		break;
306	default:
307		(void)printf(" [type %d]", type);
308		break;
309	}
310	if ((bp[4] >> 4) != 1)
311		(void)printf(" [v%d]", bp[4] >> 4);
312	return;
313
314trunc:
315	(void)printf("[|pim]");
316	return;
317}
318
319/*
320 * auto-RP is a cisco protocol, documented at
321 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
322 *
323 * This implements version 1+, dated Sept 9, 1998.
324 */
325void
326cisco_autorp_print(register const u_char *bp, register u_int len)
327{
328	int type;
329	int numrps;
330	int hold;
331
332	TCHECK(bp[0]);
333	(void)printf(" auto-rp ");
334	type = bp[0];
335	switch (type) {
336	case 0x11:
337		(void)printf("candidate-advert");
338		break;
339	case 0x12:
340		(void)printf("mapping");
341		break;
342	default:
343		(void)printf("type-0x%02x", type);
344		break;
345	}
346
347	TCHECK(bp[1]);
348	numrps = bp[1];
349
350	TCHECK2(bp[2], 2);
351	(void)printf(" Hold ");
352	hold = EXTRACT_16BITS(&bp[2]);
353	if (hold)
354		relts_print(EXTRACT_16BITS(&bp[2]));
355	else
356		printf("FOREVER");
357
358	/* Next 4 bytes are reserved. */
359
360	bp += 8; len -= 8;
361
362	/*XXX skip unless -v? */
363
364	/*
365	 * Rest of packet:
366	 * numrps entries of the form:
367	 * 32 bits: RP
368	 * 6 bits: reserved
369	 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
370	 * 8 bits: # of entries for this RP
371	 * each entry: 7 bits: reserved, 1 bit: negative,
372	 *	       8 bits: mask 32 bits: source
373	 * lather, rinse, repeat.
374	 */
375	while (numrps--) {
376		int nentries;
377		char s;
378
379		TCHECK2(bp[0], 4);
380		(void)printf(" RP %s", ipaddr_string(bp));
381		TCHECK(bp[4]);
382		switch (bp[4] & 0x3) {
383		case 0: printf(" PIMv?");
384			break;
385		case 1:	printf(" PIMv1");
386			break;
387		case 2:	printf(" PIMv2");
388			break;
389		case 3:	printf(" PIMv1+2");
390			break;
391		}
392		if (bp[4] & 0xfc)
393			(void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
394		TCHECK(bp[5]);
395		nentries = bp[5];
396		bp += 6; len -= 6;
397		s = ' ';
398		for (; nentries; nentries--) {
399			TCHECK2(bp[0], 6);
400			(void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
401			    ipaddr_string(&bp[2]), bp[1]);
402			if (bp[0] & 0x02) {
403			    (void)printf(" bidir");
404			}
405			if (bp[0] & 0xfc) {
406			    (void)printf("[rsvd=0x%02x]", bp[0] & 0xfc);
407			}
408			s = ',';
409			bp += 6; len -= 6;
410		}
411	}
412	return;
413
414trunc:
415	(void)printf("[|autorp]");
416	return;
417}
418
419void
420pim_print(register const u_char *bp, register u_int len, u_int cksum)
421{
422	register const u_char *ep;
423	register struct pim *pim = (struct pim *)bp;
424
425	ep = (const u_char *)snapend;
426	if (bp >= ep)
427		return;
428#ifdef notyet			/* currently we see only version and type */
429	TCHECK(pim->pim_rsv);
430#endif
431
432	switch (PIM_VER(pim->pim_typever)) {
433	case 2:
434            if (!vflag) {
435                printf("PIMv%u, %s, length %u",
436                       PIM_VER(pim->pim_typever),
437                       tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
438                       len);
439                return;
440            } else {
441                printf("PIMv%u, length %u\n\t%s",
442                       PIM_VER(pim->pim_typever),
443                       len,
444                       tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)));
445                pimv2_print(bp, len, cksum);
446            }
447            break;
448	default:
449		printf("PIMv%u, length %u",
450                       PIM_VER(pim->pim_typever),
451                       len);
452		break;
453	}
454	return;
455}
456
457/*
458 * PIMv2 uses encoded address representations.
459 *
460 * The last PIM-SM I-D before RFC2117 was published specified the
461 * following representation for unicast addresses.  However, RFC2117
462 * specified no encoding for unicast addresses with the unicast
463 * address length specified in the header.  Therefore, we have to
464 * guess which encoding is being used (Cisco's PIMv2 implementation
465 * uses the non-RFC encoding).  RFC2117 turns a previously "Reserved"
466 * field into a 'unicast-address-length-in-bytes' field.  We guess
467 * that it's the draft encoding if this reserved field is zero.
468 *
469 * RFC2362 goes back to the encoded format, and calls the addr length
470 * field "reserved" again.
471 *
472 * The first byte is the address family, from:
473 *
474 *    0    Reserved
475 *    1    IP (IP version 4)
476 *    2    IP6 (IP version 6)
477 *    3    NSAP
478 *    4    HDLC (8-bit multidrop)
479 *    5    BBN 1822
480 *    6    802 (includes all 802 media plus Ethernet "canonical format")
481 *    7    E.163
482 *    8    E.164 (SMDS, Frame Relay, ATM)
483 *    9    F.69 (Telex)
484 *   10    X.121 (X.25, Frame Relay)
485 *   11    IPX
486 *   12    Appletalk
487 *   13    Decnet IV
488 *   14    Banyan Vines
489 *   15    E.164 with NSAP format subaddress
490 *
491 * In addition, the second byte is an "Encoding".  0 is the default
492 * encoding for the address family, and no other encodings are currently
493 * specified.
494 *
495 */
496
497static int pimv2_addr_len;
498
499enum pimv2_addrtype {
500	pimv2_unicast, pimv2_group, pimv2_source
501};
502
503/*  0                   1                   2                   3
504 *  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
505 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
506 * | Addr Family   | Encoding Type |     Unicast Address           |
507 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
508 *  0                   1                   2                   3
509 *  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
510 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
511 * | Addr Family   | Encoding Type |   Reserved    |  Mask Len     |
512 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
513 * |                Group multicast Address                        |
514 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
515 *  0                   1                   2                   3
516 *  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
517 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
518 * | Addr Family   | Encoding Type | Rsrvd   |S|W|R|  Mask Len     |
519 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
520 * |                        Source Address                         |
521 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
522 */
523static int
524pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
525{
526	int af;
527	int len, hdrlen;
528
529	TCHECK(bp[0]);
530
531	if (pimv2_addr_len == 0) {
532		TCHECK(bp[1]);
533		switch (bp[0]) {
534		case 1:
535			af = AF_INET;
536			len = sizeof(struct in_addr);
537			break;
538#ifdef INET6
539		case 2:
540			af = AF_INET6;
541			len = sizeof(struct in6_addr);
542			break;
543#endif
544		default:
545			return -1;
546		}
547		if (bp[1] != 0)
548			return -1;
549		hdrlen = 2;
550	} else {
551		switch (pimv2_addr_len) {
552		case sizeof(struct in_addr):
553			af = AF_INET;
554			break;
555#ifdef INET6
556		case sizeof(struct in6_addr):
557			af = AF_INET6;
558			break;
559#endif
560		default:
561			return -1;
562			break;
563		}
564		len = pimv2_addr_len;
565		hdrlen = 0;
566	}
567
568	bp += hdrlen;
569	switch (at) {
570	case pimv2_unicast:
571		TCHECK2(bp[0], len);
572		if (af == AF_INET) {
573			if (!silent)
574				(void)printf("%s", ipaddr_string(bp));
575		}
576#ifdef INET6
577		else if (af == AF_INET6) {
578			if (!silent)
579				(void)printf("%s", ip6addr_string(bp));
580		}
581#endif
582		return hdrlen + len;
583	case pimv2_group:
584	case pimv2_source:
585		TCHECK2(bp[0], len + 2);
586		if (af == AF_INET) {
587			if (!silent) {
588				(void)printf("%s", ipaddr_string(bp + 2));
589				if (bp[1] != 32)
590					(void)printf("/%u", bp[1]);
591			}
592		}
593#ifdef INET6
594		else if (af == AF_INET6) {
595			if (!silent) {
596				(void)printf("%s", ip6addr_string(bp + 2));
597				if (bp[1] != 128)
598					(void)printf("/%u", bp[1]);
599			}
600		}
601#endif
602		if (bp[0] && !silent) {
603			if (at == pimv2_group) {
604				(void)printf("(0x%02x)", bp[0]);
605			} else {
606				(void)printf("(%s%s%s",
607					bp[0] & 0x04 ? "S" : "",
608					bp[0] & 0x02 ? "W" : "",
609					bp[0] & 0x01 ? "R" : "");
610				if (bp[0] & 0xf8) {
611					(void) printf("+0x%02x", bp[0] & 0xf8);
612				}
613				(void)printf(")");
614			}
615		}
616		return hdrlen + 2 + len;
617	default:
618		return -1;
619	}
620trunc:
621	return -1;
622}
623
624static void
625pimv2_print(register const u_char *bp, register u_int len, u_int cksum)
626{
627	register const u_char *ep;
628	register struct pim *pim = (struct pim *)bp;
629	int advance;
630
631	ep = (const u_char *)snapend;
632	if (bp >= ep)
633		return;
634	if (ep > bp + len)
635		ep = bp + len;
636	TCHECK(pim->pim_rsv);
637	pimv2_addr_len = pim->pim_rsv;
638	if (pimv2_addr_len != 0)
639		(void)printf(", RFC2117-encoding");
640
641        printf(", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum));
642        if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
643                printf("(unverified)");
644        } else {
645                printf("(%scorrect)", TTEST2(bp[0], len) && cksum ? "in" : "" );
646        }
647
648	switch (PIM_TYPE(pim->pim_typever)) {
649	case PIMV2_TYPE_HELLO:
650	    {
651		u_int16_t otype, olen;
652		bp += 4;
653		while (bp < ep) {
654			TCHECK2(bp[0], 4);
655			otype = EXTRACT_16BITS(&bp[0]);
656			olen = EXTRACT_16BITS(&bp[2]);
657			TCHECK2(bp[0], 4 + olen);
658
659                        printf("\n\t  %s Option (%u), length %u, Value: ",
660                               tok2str( pimv2_hello_option_values,"Unknown",otype),
661                               otype,
662                               olen);
663			bp += 4;
664
665			switch (otype) {
666			case PIMV2_HELLO_OPTION_HOLDTIME:
667                                relts_print(EXTRACT_16BITS(bp));
668                                break;
669
670			case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
671				if (olen != 4) {
672					(void)printf("ERROR: Option Length != 4 Bytes (%u)", olen);
673				} else {
674					char t_bit;
675					u_int16_t lan_delay, override_interval;
676					lan_delay = EXTRACT_16BITS(bp);
677					override_interval = EXTRACT_16BITS(bp+2);
678					t_bit = (lan_delay & 0x8000)? 1 : 0;
679					lan_delay &= ~0x8000;
680					(void)printf("\n\t    T-bit=%d, LAN delay %dms, Override interval %dms",
681					t_bit, lan_delay, override_interval);
682				}
683				break;
684
685			case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
686			case PIMV2_HELLO_OPTION_DR_PRIORITY:
687                                switch (olen) {
688                                case 0:
689                                    printf("Bi-Directional Capability (Old)");
690                                    break;
691                                case 4:
692                                    printf("%u", EXTRACT_32BITS(bp));
693                                    break;
694                                default:
695                                    printf("ERROR: Option Length != 4 Bytes (%u)", olen);
696                                    break;
697                                }
698                                break;
699
700			case PIMV2_HELLO_OPTION_GENID:
701                                (void)printf("0x%08x", EXTRACT_32BITS(bp));
702				break;
703
704			case PIMV2_HELLO_OPTION_REFRESH_CAP:
705                                (void)printf("v%d", *bp);
706				if (*(bp+1) != 0) {
707                                    (void)printf(", interval ");
708                                    relts_print(*(bp+1));
709				}
710				if (EXTRACT_16BITS(bp+2) != 0) {
711                                    (void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
712				}
713				break;
714
715			case  PIMV2_HELLO_OPTION_BIDIR_CAP:
716				break;
717
718                        case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
719                        case PIMV2_HELLO_OPTION_ADDRESS_LIST:
720				if (vflag > 1) {
721					const u_char *ptr = bp;
722					while (ptr < (bp+olen)) {
723						int advance;
724
725						printf("\n\t    ");
726						advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
727						if (advance < 0) {
728							printf("...");
729							break;
730						}
731						ptr += advance;
732					}
733				}
734				break;
735			default:
736                                if (vflag <= 1)
737                                    print_unknown_data(bp,"\n\t    ",olen);
738                                break;
739			}
740                        /* do we want to see an additionally hexdump ? */
741                        if (vflag> 1)
742                            print_unknown_data(bp,"\n\t    ",olen);
743			bp += olen;
744		}
745		break;
746	    }
747
748	case PIMV2_TYPE_REGISTER:
749	{
750		struct ip *ip;
751
752                if (!TTEST2(*(bp+4), PIMV2_REGISTER_FLAG_LEN))
753                        goto trunc;
754
755                printf(", Flags [ %s ]\n\t",
756                       tok2str(pimv2_register_flag_values,
757                               "none",
758                               EXTRACT_32BITS(bp+4)));
759
760		bp += 8; len -= 8;
761		/* encapsulated multicast packet */
762		ip = (struct ip *)bp;
763		switch (IP_V(ip)) {
764                case 0: /* Null header */
765			(void)printf("IP-Null-header %s > %s",
766                                     ipaddr_string(&ip->ip_src),
767                                     ipaddr_string(&ip->ip_dst));
768			break;
769
770		case 4:	/* IPv4 */
771			ip_print(gndo, bp, len);
772			break;
773#ifdef INET6
774		case 6:	/* IPv6 */
775			ip6_print(gndo, bp, len);
776			break;
777#endif
778                default:
779                        (void)printf("IP ver %d", IP_V(ip));
780                        break;
781		}
782		break;
783	}
784
785	case PIMV2_TYPE_REGISTER_STOP:
786		bp += 4; len -= 4;
787		if (bp >= ep)
788			break;
789		(void)printf(" group=");
790		if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
791			(void)printf("...");
792			break;
793		}
794		bp += advance; len -= advance;
795		if (bp >= ep)
796			break;
797		(void)printf(" source=");
798		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
799			(void)printf("...");
800			break;
801		}
802		bp += advance; len -= advance;
803		break;
804
805	case PIMV2_TYPE_JOIN_PRUNE:
806	case PIMV2_TYPE_GRAFT:
807	case PIMV2_TYPE_GRAFT_ACK:
808
809
810        /*
811         * 0                   1                   2                   3
812         *   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
813         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
814         *  |PIM Ver| Type  | Addr length   |           Checksum            |
815         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
816         *  |             Unicast-Upstream Neighbor Address                 |
817         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
818         *  |  Reserved     | Num groups    |          Holdtime             |
819         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
820         *  |            Encoded-Multicast Group Address-1                  |
821         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
822         *  |   Number of Joined  Sources   |   Number of Pruned Sources    |
823         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
824         *  |               Encoded-Joined Source Address-1                 |
825         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
826         *  |                             .                                 |
827         *  |                             .                                 |
828         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
829         *  |               Encoded-Joined Source Address-n                 |
830         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
831         *  |               Encoded-Pruned Source Address-1                 |
832         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
833         *  |                             .                                 |
834         *  |                             .                                 |
835         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
836         *  |               Encoded-Pruned Source Address-n                 |
837         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
838         *  |                           .                                   |
839         *  |                           .                                   |
840         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
841         *  |                Encoded-Multicast Group Address-n              |
842         *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
843         */
844
845	    {
846		u_int8_t ngroup;
847		u_int16_t holdtime;
848		u_int16_t njoin;
849		u_int16_t nprune;
850		int i, j;
851
852		bp += 4; len -= 4;
853		if (PIM_TYPE(pim->pim_typever) != 7) {	/*not for Graft-ACK*/
854			if (bp >= ep)
855				break;
856			(void)printf(", upstream-neighbor: ");
857			if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
858				(void)printf("...");
859				break;
860			}
861			bp += advance; len -= advance;
862		}
863		if (bp + 4 > ep)
864			break;
865		ngroup = bp[1];
866		holdtime = EXTRACT_16BITS(&bp[2]);
867		(void)printf("\n\t  %u group(s)", ngroup);
868		if (PIM_TYPE(pim->pim_typever) != 7) {	/*not for Graft-ACK*/
869			(void)printf(", holdtime: ");
870			if (holdtime == 0xffff)
871				(void)printf("infinite");
872			else
873				relts_print(holdtime);
874		}
875		bp += 4; len -= 4;
876		for (i = 0; i < ngroup; i++) {
877			if (bp >= ep)
878				goto jp_done;
879			(void)printf("\n\t    group #%u: ", i+1);
880			if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
881				(void)printf("...)");
882				goto jp_done;
883			}
884			bp += advance; len -= advance;
885			if (bp + 4 > ep) {
886				(void)printf("...)");
887				goto jp_done;
888			}
889			njoin = EXTRACT_16BITS(&bp[0]);
890			nprune = EXTRACT_16BITS(&bp[2]);
891			(void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
892			bp += 4; len -= 4;
893			for (j = 0; j < njoin; j++) {
894				(void)printf("\n\t      joined source #%u: ",j+1);
895				if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
896					(void)printf("...)");
897					goto jp_done;
898				}
899				bp += advance; len -= advance;
900			}
901			for (j = 0; j < nprune; j++) {
902				(void)printf("\n\t      pruned source #%u: ",j+1);
903				if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
904					(void)printf("...)");
905					goto jp_done;
906				}
907				bp += advance; len -= advance;
908			}
909		}
910	jp_done:
911		break;
912	    }
913
914	case PIMV2_TYPE_BOOTSTRAP:
915	{
916		int i, j, frpcnt;
917		bp += 4;
918
919		/* Fragment Tag, Hash Mask len, and BSR-priority */
920		if (bp + sizeof(u_int16_t) >= ep) break;
921		(void)printf(" tag=%x", EXTRACT_16BITS(bp));
922		bp += sizeof(u_int16_t);
923		if (bp >= ep) break;
924		(void)printf(" hashmlen=%d", bp[0]);
925		if (bp + 1 >= ep) break;
926		(void)printf(" BSRprio=%d", bp[1]);
927		bp += 2;
928
929		/* Encoded-Unicast-BSR-Address */
930		if (bp >= ep) break;
931		(void)printf(" BSR=");
932		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
933			(void)printf("...");
934			break;
935		}
936		bp += advance;
937
938		for (i = 0; bp < ep; i++) {
939			/* Encoded-Group Address */
940			(void)printf(" (group%d: ", i);
941			if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
942			    < 0) {
943				(void)printf("...)");
944				goto bs_done;
945			}
946			bp += advance;
947
948			/* RP-Count, Frag RP-Cnt, and rsvd */
949			if (bp >= ep) {
950				(void)printf("...)");
951				goto bs_done;
952			}
953			(void)printf(" RPcnt=%d", bp[0]);
954			if (bp + 1 >= ep) {
955				(void)printf("...)");
956				goto bs_done;
957			}
958			(void)printf(" FRPcnt=%d", frpcnt = bp[1]);
959			bp += 4;
960
961			for (j = 0; j < frpcnt && bp < ep; j++) {
962				/* each RP info */
963				(void)printf(" RP%d=", j);
964				if ((advance = pimv2_addr_print(bp,
965								pimv2_unicast,
966								0)) < 0) {
967					(void)printf("...)");
968					goto bs_done;
969				}
970				bp += advance;
971
972				if (bp + 1 >= ep) {
973					(void)printf("...)");
974					goto bs_done;
975				}
976				(void)printf(",holdtime=");
977				relts_print(EXTRACT_16BITS(bp));
978				if (bp + 2 >= ep) {
979					(void)printf("...)");
980					goto bs_done;
981				}
982				(void)printf(",prio=%d", bp[2]);
983				bp += 4;
984			}
985			(void)printf(")");
986		}
987	   bs_done:
988		break;
989	}
990	case PIMV2_TYPE_ASSERT:
991		bp += 4; len -= 4;
992		if (bp >= ep)
993			break;
994		(void)printf(" group=");
995		if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
996			(void)printf("...");
997			break;
998		}
999		bp += advance; len -= advance;
1000		if (bp >= ep)
1001			break;
1002		(void)printf(" src=");
1003		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1004			(void)printf("...");
1005			break;
1006		}
1007		bp += advance; len -= advance;
1008		if (bp + 8 > ep)
1009			break;
1010		if (bp[0] & 0x80)
1011			(void)printf(" RPT");
1012		(void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
1013		(void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
1014		break;
1015
1016	case PIMV2_TYPE_CANDIDATE_RP:
1017	{
1018		int i, pfxcnt;
1019		bp += 4;
1020
1021		/* Prefix-Cnt, Priority, and Holdtime */
1022		if (bp >= ep) break;
1023		(void)printf(" prefix-cnt=%d", bp[0]);
1024		pfxcnt = bp[0];
1025		if (bp + 1 >= ep) break;
1026		(void)printf(" prio=%d", bp[1]);
1027		if (bp + 3 >= ep) break;
1028		(void)printf(" holdtime=");
1029		relts_print(EXTRACT_16BITS(&bp[2]));
1030		bp += 4;
1031
1032		/* Encoded-Unicast-RP-Address */
1033		if (bp >= ep) break;
1034		(void)printf(" RP=");
1035		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1036			(void)printf("...");
1037			break;
1038		}
1039		bp += advance;
1040
1041		/* Encoded-Group Addresses */
1042		for (i = 0; i < pfxcnt && bp < ep; i++) {
1043			(void)printf(" Group%d=", i);
1044			if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
1045			    < 0) {
1046				(void)printf("...");
1047				break;
1048			}
1049			bp += advance;
1050		}
1051		break;
1052	}
1053
1054	case PIMV2_TYPE_PRUNE_REFRESH:
1055		(void)printf(" src=");
1056		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1057			(void)printf("...");
1058			break;
1059		}
1060		bp += advance;
1061		(void)printf(" grp=");
1062		if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
1063			(void)printf("...");
1064			break;
1065		}
1066		bp += advance;
1067		(void)printf(" forwarder=");
1068		if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1069			(void)printf("...");
1070			break;
1071		}
1072		bp += advance;
1073		TCHECK2(bp[0], 2);
1074		(void)printf(" TUNR ");
1075		relts_print(EXTRACT_16BITS(bp));
1076		break;
1077
1078
1079	 default:
1080		(void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
1081		break;
1082	}
1083
1084	return;
1085
1086trunc:
1087	(void)printf("[|pim]");
1088}
1089
1090/*
1091 * Local Variables:
1092 * c-style: whitesmith
1093 * c-basic-offset: 8
1094 * End:
1095 */
1096