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