39c4e4d73835238b24ad92f6d9c4186cbac1d938
[dragonfly.git] / contrib / tcpdump-3.9 / print-pim.c
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
23 static const char rcsid[] _U_ =
24     "@(#) $Header: /tcpdump/master/tcpdump/print-pim.c,v 1.45.2.4 2006/02/13 01:32:34 hannes Exp $ (LBL)";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <tcpdump-stdinc.h>
32 #include "interface.h"
33
34 #define PIMV2_TYPE_HELLO         0
35 #define PIMV2_TYPE_REGISTER      1
36 #define PIMV2_TYPE_REGISTER_STOP 2
37 #define PIMV2_TYPE_JOIN_PRUNE    3
38 #define PIMV2_TYPE_BOOTSTRAP     4
39 #define PIMV2_TYPE_ASSERT        5
40 #define PIMV2_TYPE_GRAFT         6
41 #define PIMV2_TYPE_GRAFT_ACK     7
42 #define PIMV2_TYPE_CANDIDATE_RP  8
43 #define PIMV2_TYPE_PRUNE_REFRESH 9
44
45 static struct tok pimv2_type_values[] = {
46     { PIMV2_TYPE_HELLO,         "Hello" },
47     { PIMV2_TYPE_REGISTER,      "Register" },
48     { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
49     { PIMV2_TYPE_JOIN_PRUNE,    "Join / Prune" },
50     { PIMV2_TYPE_BOOTSTRAP,     "Bootstrap" },
51     { PIMV2_TYPE_ASSERT,        "Assert" },
52     { PIMV2_TYPE_GRAFT,         "Graft" },
53     { PIMV2_TYPE_GRAFT_ACK,     "Graft Acknowledgement" },
54     { PIMV2_TYPE_CANDIDATE_RP,  "Candidate RP Advertisement" },
55     { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
56     { 0, NULL}
57 };
58
59 #define PIMV2_HELLO_OPTION_HOLDTIME             1
60 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY        2
61 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD     18
62 #define PIMV2_HELLO_OPTION_DR_PRIORITY         19
63 #define PIMV2_HELLO_OPTION_GENID               20
64 #define PIMV2_HELLO_OPTION_REFRESH_CAP         21
65 #define PIMV2_HELLO_OPTION_BIDIR_CAP           22
66 #define PIMV2_HELLO_OPTION_ADDRESS_LIST        24
67 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
68
69 static struct tok pimv2_hello_option_values[] = {
70     { PIMV2_HELLO_OPTION_HOLDTIME,         "Hold Time" },
71     { PIMV2_HELLO_OPTION_LANPRUNEDELAY,    "LAN Prune Delay" },
72     { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD,  "DR Priority (Old)" },
73     { PIMV2_HELLO_OPTION_DR_PRIORITY,      "DR Priority" },
74     { PIMV2_HELLO_OPTION_GENID,            "Generation ID" },
75     { PIMV2_HELLO_OPTION_REFRESH_CAP,      "State Refresh Capability" },
76     { PIMV2_HELLO_OPTION_BIDIR_CAP,        "Bi-Directional Capability" },
77     { PIMV2_HELLO_OPTION_ADDRESS_LIST,     "Address List" },
78     { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
79     { 0, NULL}
80 };
81
82 #define PIMV2_REGISTER_FLAG_LEN      4
83 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000
84 #define PIMV2_REGISTER_FLAG_NULL   0x40000000
85
86 static struct tok pimv2_register_flag_values[] = {
87     { PIMV2_REGISTER_FLAG_BORDER, "Border" },
88     { PIMV2_REGISTER_FLAG_NULL, "Null" },
89     { 0, NULL}
90 };    
91
92 /*
93  * XXX: We consider a case where IPv6 is not ready yet for portability,
94  * but PIM dependent defintions should be independent of IPv6...
95  */
96
97 struct pim {
98         u_int8_t pim_typever;
99                         /* upper 4bit: PIM version number; 2 for PIMv2 */
100                         /* lower 4bit: the PIM message type, currently they are:
101                          * Hello, Register, Register-Stop, Join/Prune,
102                          * Bootstrap, Assert, Graft (PIM-DM only),
103                          * Graft-Ack (PIM-DM only), C-RP-Adv
104                          */
105 #define PIM_VER(x)      (((x) & 0xf0) >> 4)
106 #define PIM_TYPE(x)     ((x) & 0x0f)
107         u_char  pim_rsv;        /* Reserved */
108         u_short pim_cksum;      /* IP style check sum */
109 };
110
111
112 #include <stdio.h>
113 #include <stdlib.h>
114
115 #include "interface.h"
116 #include "addrtoname.h"
117 #include "extract.h"
118
119 #include "ip.h"
120
121 static void pimv2_print(register const u_char *bp, register u_int len);
122
123 static void
124 pimv1_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;
206 trunc:
207         (void)printf("[|pim]");
208         return;
209 }
210
211 void
212 pimv1_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
314 trunc:
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  */
325 void
326 cisco_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] & 0xfe)
403                                 (void)printf("[rsvd=0x%02x]", bp[0] & 0xfe);
404                         s = ',';
405                         bp += 6; len -= 6;
406                 }
407         }
408         return;
409
410 trunc:
411         (void)printf("[|autorp]");
412         return;
413 }
414
415 void
416 pim_print(register const u_char *bp, register u_int len)
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);
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
493 static int pimv2_addr_len;
494
495 enum 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  */
519 static int
520 pimv2_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         }
616 trunc:
617         return -1;
618 }
619
620 static void
621 pimv2_print(register const u_char *bp, register u_int len)
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)",
642                        TTEST2(bp[0], len) &&
643                        in_cksum((const u_short*)bp, len, 0) ? "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
1084 trunc:
1085         (void)printf("[|pim]");
1086 }
1087
1088 /*
1089  * Local Variables:
1090  * c-style: whitesmith
1091  * c-basic-offset: 8
1092  * End:
1093  */