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