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
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37
  38 #include "interface.h"
  39 #include "addrtoname.h"
  40 #include "extract.h"
  41
  42 #include "ip.h"
  43
  44 #define PIMV2_TYPE_HELLO         0
  45 #define PIMV2_TYPE_REGISTER      1
  46 #define PIMV2_TYPE_REGISTER_STOP 2
  47 #define PIMV2_TYPE_JOIN_PRUNE    3
  48 #define PIMV2_TYPE_BOOTSTRAP     4
  49 #define PIMV2_TYPE_ASSERT        5
  50 #define PIMV2_TYPE_GRAFT         6
  51 #define PIMV2_TYPE_GRAFT_ACK     7
  52 #define PIMV2_TYPE_CANDIDATE_RP  8
  53 #define PIMV2_TYPE_PRUNE_REFRESH 9
  54
  55 static struct tok pimv2_type_values[] = {
  56     { PIMV2_TYPE_HELLO,         "Hello" },
  57     { PIMV2_TYPE_REGISTER,      "Register" },
  58     { PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
  59     { PIMV2_TYPE_JOIN_PRUNE,    "Join / Prune" },
  60     { PIMV2_TYPE_BOOTSTRAP,     "Bootstrap" },
  61     { PIMV2_TYPE_ASSERT,        "Assert" },
  62     { PIMV2_TYPE_GRAFT,         "Graft" },
  63     { PIMV2_TYPE_GRAFT_ACK,     "Graft Acknowledgement" },
  64     { PIMV2_TYPE_CANDIDATE_RP,  "Candidate RP Advertisement" },
  65     { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
  66     { 0, NULL}
  67 };
  68
  69 #define PIMV2_HELLO_OPTION_HOLDTIME             1
  70 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY        2
  71 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD     18
  72 #define PIMV2_HELLO_OPTION_DR_PRIORITY         19
  73 #define PIMV2_HELLO_OPTION_GENID               20
  74 #define PIMV2_HELLO_OPTION_REFRESH_CAP         21
  75 #define PIMV2_HELLO_OPTION_BIDIR_CAP           22
  76 #define PIMV2_HELLO_OPTION_ADDRESS_LIST        24
  77 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
  78
  79 static struct tok pimv2_hello_option_values[] = {
  80     { PIMV2_HELLO_OPTION_HOLDTIME,         "Hold Time" },
  81     { PIMV2_HELLO_OPTION_LANPRUNEDELAY,    "LAN Prune Delay" },
  82     { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD,  "DR Priority (Old)" },
  83     { PIMV2_HELLO_OPTION_DR_PRIORITY,      "DR Priority" },
  84     { PIMV2_HELLO_OPTION_GENID,            "Generation ID" },
  85     { PIMV2_HELLO_OPTION_REFRESH_CAP,      "State Refresh Capability" },
  86     { PIMV2_HELLO_OPTION_BIDIR_CAP,        "Bi-Directional Capability" },
  87     { PIMV2_HELLO_OPTION_ADDRESS_LIST,     "Address List" },
  88     { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
  89     { 0, NULL}
  90 };
  91
  92 #define PIMV2_REGISTER_FLAG_LEN      4
  93 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000
  94 #define PIMV2_REGISTER_FLAG_NULL   0x40000000
  95
  96 static struct tok pimv2_register_flag_values[] = {
  97     { PIMV2_REGISTER_FLAG_BORDER, "Border" },
  98     { PIMV2_REGISTER_FLAG_NULL, "Null" },
  99     { 0, NULL}
 100 };
 101
 102 /*
 103  * XXX: We consider a case where IPv6 is not ready yet for portability,
 104  * but PIM dependent defintions should be independent of IPv6...
 105  */
 106
 107 struct pim {
 108         u_int8_t pim_typever;
 109                         /* upper 4bit: PIM version number; 2 for PIMv2 */
 110                         /* lower 4bit: the PIM message type, currently they are:
 111                          * Hello, Register, Register-Stop, Join/Prune,
 112                          * Bootstrap, Assert, Graft (PIM-DM only),
 113                          * Graft-Ack (PIM-DM only), C-RP-Adv
 114                          */
 115 #define PIM_VER(x)      (((x) & 0xf0) >> 4)
 116 #define PIM_TYPE(x)     ((x) & 0x0f)
 117         u_char  pim_rsv;        /* Reserved */
 118         u_short pim_cksum;      /* IP style check sum */
 119 };
 120
 121 static void pimv2_print(register const u_char *bp, register u_int len, u_int cksum);
 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] & 0x02) {
 403                             (void)printf(" bidir");
 404                         }
 405                         if (bp[0] & 0xfc) {
 406                             (void)printf("[rsvd=0x%02x]", bp[0] & 0xfc);
 407                         }
 408                         s = ',';
 409                         bp += 6; len -= 6;
 410                 }
 411         }
 412         return;
 413
 414 trunc:
 415         (void)printf("[|autorp]");
 416         return;
 417 }
 418
 419 void
 420 pim_print(register const u_char *bp, register u_int len, u_int cksum)
 421 {
 422         register const u_char *ep;
 423         register struct pim *pim = (struct pim *)bp;
 424
 425         ep = (const u_char *)snapend;
 426         if (bp >= ep)
 427                 return;
 428 #ifdef notyet                   /* currently we see only version and type */
 429         TCHECK(pim->pim_rsv);
 430 #endif
 431
 432         switch (PIM_VER(pim->pim_typever)) {
 433         case 2:
 434             if (!vflag) {
 435                 printf("PIMv%u, %s, length %u",
 436                        PIM_VER(pim->pim_typever),
 437                        tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
 438                        len);
 439                 return;
 440             } else {
 441                 printf("PIMv%u, length %u\n\t%s",
 442                        PIM_VER(pim->pim_typever),
 443                        len,
 444                        tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)));
 445                 pimv2_print(bp, len, cksum);
 446             }
 447             break;
 448         default:
 449                 printf("PIMv%u, length %u",
 450                        PIM_VER(pim->pim_typever),
 451                        len);
 452                 break;
 453         }
 454         return;
 455 }
 456
 457 /*
 458  * PIMv2 uses encoded address representations.
 459  *
 460  * The last PIM-SM I-D before RFC2117 was published specified the
 461  * following representation for unicast addresses.  However, RFC2117
 462  * specified no encoding for unicast addresses with the unicast
 463  * address length specified in the header.  Therefore, we have to
 464  * guess which encoding is being used (Cisco's PIMv2 implementation
 465  * uses the non-RFC encoding).  RFC2117 turns a previously "Reserved"
 466  * field into a 'unicast-address-length-in-bytes' field.  We guess
 467  * that it's the draft encoding if this reserved field is zero.
 468  *
 469  * RFC2362 goes back to the encoded format, and calls the addr length
 470  * field "reserved" again.
 471  *
 472  * The first byte is the address family, from:
 473  *
 474  *    0    Reserved
 475  *    1    IP (IP version 4)
 476  *    2    IP6 (IP version 6)
 477  *    3    NSAP
 478  *    4    HDLC (8-bit multidrop)
 479  *    5    BBN 1822
 480  *    6    802 (includes all 802 media plus Ethernet "canonical format")
 481  *    7    E.163
 482  *    8    E.164 (SMDS, Frame Relay, ATM)
 483  *    9    F.69 (Telex)
 484  *   10    X.121 (X.25, Frame Relay)
 485  *   11    IPX
 486  *   12    Appletalk
 487  *   13    Decnet IV
 488  *   14    Banyan Vines
 489  *   15    E.164 with NSAP format subaddress
 490  *
 491  * In addition, the second byte is an "Encoding".  0 is the default
 492  * encoding for the address family, and no other encodings are currently
 493  * specified.
 494  *
 495  */
 496
 497 static int pimv2_addr_len;
 498
 499 enum pimv2_addrtype {
 500         pimv2_unicast, pimv2_group, pimv2_source
 501 };
 502
 503 /*  0                   1                   2                   3
 504  *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 505  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 506  * | Addr Family   | Encoding Type |     Unicast Address           |
 507  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
 508  *  0                   1                   2                   3
 509  *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 510  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 511  * | Addr Family   | Encoding Type |   Reserved    |  Mask Len     |
 512  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 513  * |                Group multicast Address                        |
 514  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 515  *  0                   1                   2                   3
 516  *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 517  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 518  * | Addr Family   | Encoding Type | Rsrvd   |S|W|R|  Mask Len     |
 519  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 520  * |                        Source Address                         |
 521  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 522  */
 523 static int
 524 pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
 525 {
 526         int af;
 527         int len, hdrlen;
 528
 529         TCHECK(bp[0]);
 530
 531         if (pimv2_addr_len == 0) {
 532                 TCHECK(bp[1]);
 533                 switch (bp[0]) {
 534                 case 1:
 535                         af = AF_INET;
 536                         len = sizeof(struct in_addr);
 537                         break;
 538 #ifdef INET6
 539                 case 2:
 540                         af = AF_INET6;
 541                         len = sizeof(struct in6_addr);
 542                         break;
 543 #endif
 544                 default:
 545                         return -1;
 546                 }
 547                 if (bp[1] != 0)
 548                         return -1;
 549                 hdrlen = 2;
 550         } else {
 551                 switch (pimv2_addr_len) {
 552                 case sizeof(struct in_addr):
 553                         af = AF_INET;
 554                         break;
 555 #ifdef INET6
 556                 case sizeof(struct in6_addr):
 557                         af = AF_INET6;
 558                         break;
 559 #endif
 560                 default:
 561                         return -1;
 562                         break;
 563                 }
 564                 len = pimv2_addr_len;
 565                 hdrlen = 0;
 566         }
 567
 568         bp += hdrlen;
 569         switch (at) {
 570         case pimv2_unicast:
 571                 TCHECK2(bp[0], len);
 572                 if (af == AF_INET) {
 573                         if (!silent)
 574                                 (void)printf("%s", ipaddr_string(bp));
 575                 }
 576 #ifdef INET6
 577                 else if (af == AF_INET6) {
 578                         if (!silent)
 579                                 (void)printf("%s", ip6addr_string(bp));
 580                 }
 581 #endif
 582                 return hdrlen + len;
 583         case pimv2_group:
 584         case pimv2_source:
 585                 TCHECK2(bp[0], len + 2);
 586                 if (af == AF_INET) {
 587                         if (!silent) {
 588                                 (void)printf("%s", ipaddr_string(bp + 2));
 589                                 if (bp[1] != 32)
 590                                         (void)printf("/%u", bp[1]);
 591                         }
 592                 }
 593 #ifdef INET6
 594                 else if (af == AF_INET6) {
 595                         if (!silent) {
 596                                 (void)printf("%s", ip6addr_string(bp + 2));
 597                                 if (bp[1] != 128)
 598                                         (void)printf("/%u", bp[1]);
 599                         }
 600                 }
 601 #endif
 602                 if (bp[0] && !silent) {
 603                         if (at == pimv2_group) {
 604                                 (void)printf("(0x%02x)", bp[0]);
 605                         } else {
 606                                 (void)printf("(%s%s%s",
 607                                         bp[0] & 0x04 ? "S" : "",
 608                                         bp[0] & 0x02 ? "W" : "",
 609                                         bp[0] & 0x01 ? "R" : "");
 610                                 if (bp[0] & 0xf8) {
 611                                         (void) printf("+0x%02x", bp[0] & 0xf8);
 612                                 }
 613                                 (void)printf(")");
 614                         }
 615                 }
 616                 return hdrlen + 2 + len;
 617         default:
 618                 return -1;
 619         }
 620 trunc:
 621         return -1;
 622 }
 623
 624 static void
 625 pimv2_print(register const u_char *bp, register u_int len, u_int cksum)
 626 {
 627         register const u_char *ep;
 628         register struct pim *pim = (struct pim *)bp;
 629         int advance;
 630
 631         ep = (const u_char *)snapend;
 632         if (bp >= ep)
 633                 return;
 634         if (ep > bp + len)
 635                 ep = bp + len;
 636         TCHECK(pim->pim_rsv);
 637         pimv2_addr_len = pim->pim_rsv;
 638         if (pimv2_addr_len != 0)
 639                 (void)printf(", RFC2117-encoding");
 640
 641         printf(", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum));
 642         if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
 643                 printf("(unverified)");
 644         } else {
 645                 printf("(%scorrect)", TTEST2(bp[0], len) && cksum ? "in" : "" );
 646         }
 647
 648         switch (PIM_TYPE(pim->pim_typever)) {
 649         case PIMV2_TYPE_HELLO:
 650             {
 651                 u_int16_t otype, olen;
 652                 bp += 4;
 653                 while (bp < ep) {
 654                         TCHECK2(bp[0], 4);
 655                         otype = EXTRACT_16BITS(&bp[0]);
 656                         olen = EXTRACT_16BITS(&bp[2]);
 657                         TCHECK2(bp[0], 4 + olen);
 658
 659                         printf("\n\t  %s Option (%u), length %u, Value: ",
 660                                tok2str( pimv2_hello_option_values,"Unknown",otype),
 661                                otype,
 662                                olen);
 663                         bp += 4;
 664
 665                         switch (otype) {
 666                         case PIMV2_HELLO_OPTION_HOLDTIME:
 667                                 relts_print(EXTRACT_16BITS(bp));
 668                                 break;
 669
 670                         case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
 671                                 if (olen != 4) {
 672                                         (void)printf("ERROR: Option Length != 4 Bytes (%u)", olen);
 673                                 } else {
 674                                         char t_bit;
 675                                         u_int16_t lan_delay, override_interval;
 676                                         lan_delay = EXTRACT_16BITS(bp);
 677                                         override_interval = EXTRACT_16BITS(bp+2);
 678                                         t_bit = (lan_delay & 0x8000)? 1 : 0;
 679                                         lan_delay &= ~0x8000;
 680                                         (void)printf("\n\t    T-bit=%d, LAN delay %dms, Override interval %dms",
 681                                         t_bit, lan_delay, override_interval);
 682                                 }
 683                                 break;
 684
 685                         case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
 686                         case PIMV2_HELLO_OPTION_DR_PRIORITY:
 687                                 switch (olen) {
 688                                 case 0:
 689                                     printf("Bi-Directional Capability (Old)");
 690                                     break;
 691                                 case 4:
 692                                     printf("%u", EXTRACT_32BITS(bp));
 693                                     break;
 694                                 default:
 695                                     printf("ERROR: Option Length != 4 Bytes (%u)", olen);
 696                                     break;
 697                                 }
 698                                 break;
 699
 700                         case PIMV2_HELLO_OPTION_GENID:
 701                                 (void)printf("0x%08x", EXTRACT_32BITS(bp));
 702                                 break;
 703
 704                         case PIMV2_HELLO_OPTION_REFRESH_CAP:
 705                                 (void)printf("v%d", *bp);
 706                                 if (*(bp+1) != 0) {
 707                                     (void)printf(", interval ");
 708                                     relts_print(*(bp+1));
 709                                 }
 710                                 if (EXTRACT_16BITS(bp+2) != 0) {
 711                                     (void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
 712                                 }
 713                                 break;
 714
 715                         case  PIMV2_HELLO_OPTION_BIDIR_CAP:
 716                                 break;
 717
 718                         case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
 719                         case PIMV2_HELLO_OPTION_ADDRESS_LIST:
 720                                 if (vflag > 1) {
 721                                         const u_char *ptr = bp;
 722                                         while (ptr < (bp+olen)) {
 723                                                 int advance;
 724
 725                                                 printf("\n\t    ");
 726                                                 advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
 727                                                 if (advance < 0) {
 728                                                         printf("...");
 729                                                         break;
 730                                                 }
 731                                                 ptr += advance;
 732                                         }
 733                                 }
 734                                 break;
 735                         default:
 736                                 if (vflag <= 1)
 737                                     print_unknown_data(bp,"\n\t    ",olen);
 738                                 break;
 739                         }
 740                         /* do we want to see an additionally hexdump ? */
 741                         if (vflag> 1)
 742                             print_unknown_data(bp,"\n\t    ",olen);
 743                         bp += olen;
 744                 }
 745                 break;
 746             }
 747
 748         case PIMV2_TYPE_REGISTER:
 749         {
 750                 struct ip *ip;
 751
 752                 if (!TTEST2(*(bp+4), PIMV2_REGISTER_FLAG_LEN))
 753                         goto trunc;
 754
 755                 printf(", Flags [ %s ]\n\t",
 756                        tok2str(pimv2_register_flag_values,
 757                                "none",
 758                                EXTRACT_32BITS(bp+4)));
 759
 760                 bp += 8; len -= 8;
 761                 /* encapsulated multicast packet */
 762                 ip = (struct ip *)bp;
 763                 switch (IP_V(ip)) {
 764                 case 0: /* Null header */
 765                         (void)printf("IP-Null-header %s > %s",
 766                                      ipaddr_string(&ip->ip_src),
 767                                      ipaddr_string(&ip->ip_dst));
 768                         break;
 769
 770                 case 4: /* IPv4 */
 771                         ip_print(gndo, bp, len);
 772                         break;
 773 #ifdef INET6
 774                 case 6: /* IPv6 */
 775                         ip6_print(gndo, bp, len);
 776                         break;
 777 #endif
 778                 default:
 779                         (void)printf("IP ver %d", IP_V(ip));
 780                         break;
 781                 }
 782                 break;
 783         }
 784
 785         case PIMV2_TYPE_REGISTER_STOP:
 786                 bp += 4; len -= 4;
 787                 if (bp >= ep)
 788                         break;
 789                 (void)printf(" group=");
 790                 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
 791                         (void)printf("...");
 792                         break;
 793                 }
 794                 bp += advance; len -= advance;
 795                 if (bp >= ep)
 796                         break;
 797                 (void)printf(" source=");
 798                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
 799                         (void)printf("...");
 800                         break;
 801                 }
 802                 bp += advance; len -= advance;
 803                 break;
 804
 805         case PIMV2_TYPE_JOIN_PRUNE:
 806         case PIMV2_TYPE_GRAFT:
 807         case PIMV2_TYPE_GRAFT_ACK:
 808
 809
 810         /*
 811          * 0                   1                   2                   3
 812          *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 813          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 814          *  |PIM Ver| Type  | Addr length   |           Checksum            |
 815          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 816          *  |             Unicast-Upstream Neighbor Address                 |
 817          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 818          *  |  Reserved     | Num groups    |          Holdtime             |
 819          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 820          *  |            Encoded-Multicast Group Address-1                  |
 821          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 822          *  |   Number of Joined  Sources   |   Number of Pruned Sources    |
 823          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 824          *  |               Encoded-Joined Source Address-1                 |
 825          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 826          *  |                             .                                 |
 827          *  |                             .                                 |
 828          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 829          *  |               Encoded-Joined Source Address-n                 |
 830          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 831          *  |               Encoded-Pruned Source Address-1                 |
 832          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 833          *  |                             .                                 |
 834          *  |                             .                                 |
 835          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 836          *  |               Encoded-Pruned Source Address-n                 |
 837          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 838          *  |                           .                                   |
 839          *  |                           .                                   |
 840          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 841          *  |                Encoded-Multicast Group Address-n              |
 842          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 843          */
 844
 845             {
 846                 u_int8_t ngroup;
 847                 u_int16_t holdtime;
 848                 u_int16_t njoin;
 849                 u_int16_t nprune;
 850                 int i, j;
 851
 852                 bp += 4; len -= 4;
 853                 if (PIM_TYPE(pim->pim_typever) != 7) {  /*not for Graft-ACK*/
 854                         if (bp >= ep)
 855                                 break;
 856                         (void)printf(", upstream-neighbor: ");
 857                         if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
 858                                 (void)printf("...");
 859                                 break;
 860                         }
 861                         bp += advance; len -= advance;
 862                 }
 863                 if (bp + 4 > ep)
 864                         break;
 865                 ngroup = bp[1];
 866                 holdtime = EXTRACT_16BITS(&bp[2]);
 867                 (void)printf("\n\t  %u group(s)", ngroup);
 868                 if (PIM_TYPE(pim->pim_typever) != 7) {  /*not for Graft-ACK*/
 869                         (void)printf(", holdtime: ");
 870                         if (holdtime == 0xffff)
 871                                 (void)printf("infinite");
 872                         else
 873                                 relts_print(holdtime);
 874                 }
 875                 bp += 4; len -= 4;
 876                 for (i = 0; i < ngroup; i++) {
 877                         if (bp >= ep)
 878                                 goto jp_done;
 879                         (void)printf("\n\t    group #%u: ", i+1);
 880                         if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
 881                                 (void)printf("...)");
 882                                 goto jp_done;
 883                         }
 884                         bp += advance; len -= advance;
 885                         if (bp + 4 > ep) {
 886                                 (void)printf("...)");
 887                                 goto jp_done;
 888                         }
 889                         njoin = EXTRACT_16BITS(&bp[0]);
 890                         nprune = EXTRACT_16BITS(&bp[2]);
 891                         (void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
 892                         bp += 4; len -= 4;
 893                         for (j = 0; j < njoin; j++) {
 894                                 (void)printf("\n\t      joined source #%u: ",j+1);
 895                                 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
 896                                         (void)printf("...)");
 897                                         goto jp_done;
 898                                 }
 899                                 bp += advance; len -= advance;
 900                         }
 901                         for (j = 0; j < nprune; j++) {
 902                                 (void)printf("\n\t      pruned source #%u: ",j+1);
 903                                 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
 904                                         (void)printf("...)");
 905                                         goto jp_done;
 906                                 }
 907                                 bp += advance; len -= advance;
 908                         }
 909                 }
 910         jp_done:
 911                 break;
 912             }
 913
 914         case PIMV2_TYPE_BOOTSTRAP:
 915         {
 916                 int i, j, frpcnt;
 917                 bp += 4;
 918
 919                 /* Fragment Tag, Hash Mask len, and BSR-priority */
 920                 if (bp + sizeof(u_int16_t) >= ep) break;
 921                 (void)printf(" tag=%x", EXTRACT_16BITS(bp));
 922                 bp += sizeof(u_int16_t);
 923                 if (bp >= ep) break;
 924                 (void)printf(" hashmlen=%d", bp[0]);
 925                 if (bp + 1 >= ep) break;
 926                 (void)printf(" BSRprio=%d", bp[1]);
 927                 bp += 2;
 928
 929                 /* Encoded-Unicast-BSR-Address */
 930                 if (bp >= ep) break;
 931                 (void)printf(" BSR=");
 932                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
 933                         (void)printf("...");
 934                         break;
 935                 }
 936                 bp += advance;
 937
 938                 for (i = 0; bp < ep; i++) {
 939                         /* Encoded-Group Address */
 940                         (void)printf(" (group%d: ", i);
 941                         if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
 942                             < 0) {
 943                                 (void)printf("...)");
 944                                 goto bs_done;
 945                         }
 946                         bp += advance;
 947
 948                         /* RP-Count, Frag RP-Cnt, and rsvd */
 949                         if (bp >= ep) {
 950                                 (void)printf("...)");
 951                                 goto bs_done;
 952                         }
 953                         (void)printf(" RPcnt=%d", bp[0]);
 954                         if (bp + 1 >= ep) {
 955                                 (void)printf("...)");
 956                                 goto bs_done;
 957                         }
 958                         (void)printf(" FRPcnt=%d", frpcnt = bp[1]);
 959                         bp += 4;
 960
 961                         for (j = 0; j < frpcnt && bp < ep; j++) {
 962                                 /* each RP info */
 963                                 (void)printf(" RP%d=", j);
 964                                 if ((advance = pimv2_addr_print(bp,
 965                                                                 pimv2_unicast,
 966                                                                 0)) < 0) {
 967                                         (void)printf("...)");
 968                                         goto bs_done;
 969                                 }
 970                                 bp += advance;
 971
 972                                 if (bp + 1 >= ep) {
 973                                         (void)printf("...)");
 974                                         goto bs_done;
 975                                 }
 976                                 (void)printf(",holdtime=");
 977                                 relts_print(EXTRACT_16BITS(bp));
 978                                 if (bp + 2 >= ep) {
 979                                         (void)printf("...)");
 980                                         goto bs_done;
 981                                 }
 982                                 (void)printf(",prio=%d", bp[2]);
 983                                 bp += 4;
 984                         }
 985                         (void)printf(")");
 986                 }
 987            bs_done:
 988                 break;
 989         }
 990         case PIMV2_TYPE_ASSERT:
 991                 bp += 4; len -= 4;
 992                 if (bp >= ep)
 993                         break;
 994                 (void)printf(" group=");
 995                 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
 996                         (void)printf("...");
 997                         break;
 998                 }
 999                 bp += advance; len -= advance;
1000                 if (bp >= ep)
1001                         break;
1002                 (void)printf(" src=");
1003                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1004                         (void)printf("...");
1005                         break;
1006                 }
1007                 bp += advance; len -= advance;
1008                 if (bp + 8 > ep)
1009                         break;
1010                 if (bp[0] & 0x80)
1011                         (void)printf(" RPT");
1012                 (void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
1013                 (void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
1014                 break;
1015
1016         case PIMV2_TYPE_CANDIDATE_RP:
1017         {
1018                 int i, pfxcnt;
1019                 bp += 4;
1020
1021                 /* Prefix-Cnt, Priority, and Holdtime */
1022                 if (bp >= ep) break;
1023                 (void)printf(" prefix-cnt=%d", bp[0]);
1024                 pfxcnt = bp[0];
1025                 if (bp + 1 >= ep) break;
1026                 (void)printf(" prio=%d", bp[1]);
1027                 if (bp + 3 >= ep) break;
1028                 (void)printf(" holdtime=");
1029                 relts_print(EXTRACT_16BITS(&bp[2]));
1030                 bp += 4;
1031
1032                 /* Encoded-Unicast-RP-Address */
1033                 if (bp >= ep) break;
1034                 (void)printf(" RP=");
1035                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1036                         (void)printf("...");
1037                         break;
1038                 }
1039                 bp += advance;
1040
1041                 /* Encoded-Group Addresses */
1042                 for (i = 0; i < pfxcnt && bp < ep; i++) {
1043                         (void)printf(" Group%d=", i);
1044                         if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
1045                             < 0) {
1046                                 (void)printf("...");
1047                                 break;
1048                         }
1049                         bp += advance;
1050                 }
1051                 break;
1052         }
1053
1054         case PIMV2_TYPE_PRUNE_REFRESH:
1055                 (void)printf(" src=");
1056                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1057                         (void)printf("...");
1058                         break;
1059                 }
1060                 bp += advance;
1061                 (void)printf(" grp=");
1062                 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
1063                         (void)printf("...");
1064                         break;
1065                 }
1066                 bp += advance;
1067                 (void)printf(" forwarder=");
1068                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1069                         (void)printf("...");
1070                         break;
1071                 }
1072                 bp += advance;
1073                 TCHECK2(bp[0], 2);
1074                 (void)printf(" TUNR ");
1075                 relts_print(EXTRACT_16BITS(bp));
1076                 break;
1077
1078
1079          default:
1080                 (void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
1081                 break;
1082         }
1083
1084         return;
1085
1086 trunc:
1087         (void)printf("[|pim]");
1088 }
1089
1090 /*
1091  * Local Variables:
1092  * c-style: whitesmith
1093  * c-basic-offset: 8
1094  * End:
1095  */