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 1.45 2005/04/06 21:32:42 mcr 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
  85 /*
  86  * XXX: We consider a case where IPv6 is not ready yet for portability,
  87  * but PIM dependent defintions should be independent of IPv6...
  88  */
  89
  90 struct pim {
  91         u_int8_t pim_typever;
  92                         /* upper 4bit: PIM version number; 2 for PIMv2 */
  93                         /* lower 4bit: the PIM message type, currently they are:
  94                          * Hello, Register, Register-Stop, Join/Prune,
  95                          * Bootstrap, Assert, Graft (PIM-DM only),
  96                          * Graft-Ack (PIM-DM only), C-RP-Adv
  97                          */
  98 #define PIM_VER(x)      (((x) & 0xf0) >> 4)
  99 #define PIM_TYPE(x)     ((x) & 0x0f)
 100         u_char  pim_rsv;        /* Reserved */
 101         u_short pim_cksum;      /* IP style check sum */
 102 };
 103
 104
 105 #include <stdio.h>
 106 #include <stdlib.h>
 107
 108 #include "interface.h"
 109 #include "addrtoname.h"
 110 #include "extract.h"
 111
 112 #include "ip.h"
 113
 114 static void pimv2_print(register const u_char *bp, register u_int len);
 115
 116 static void
 117 pimv1_join_prune_print(register const u_char *bp, register u_int len)
 118 {
 119         int maddrlen, addrlen, ngroups, njoin, nprune;
 120         int njp;
 121
 122         /* If it's a single group and a single source, use 1-line output. */
 123         if (TTEST2(bp[0], 30) && bp[11] == 1 &&
 124             ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
 125                 int hold;
 126
 127                 (void)printf(" RPF %s ", ipaddr_string(bp));
 128                 hold = EXTRACT_16BITS(&bp[6]);
 129                 if (hold != 180) {
 130                         (void)printf("Hold ");
 131                         relts_print(hold);
 132                 }
 133                 (void)printf("%s (%s/%d, %s", njoin ? "Join" : "Prune",
 134                 ipaddr_string(&bp[26]), bp[25] & 0x3f,
 135                 ipaddr_string(&bp[12]));
 136                 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
 137                         (void)printf("/%s", ipaddr_string(&bp[16]));
 138                 (void)printf(") %s%s %s",
 139                     (bp[24] & 0x01) ? "Sparse" : "Dense",
 140                     (bp[25] & 0x80) ? " WC" : "",
 141                     (bp[25] & 0x40) ? "RP" : "SPT");
 142                 return;
 143         }
 144
 145         TCHECK2(bp[0], 4);
 146         if (vflag > 1)
 147                 (void)printf("\n");
 148         (void)printf(" Upstream Nbr: %s", ipaddr_string(bp));
 149         TCHECK2(bp[6], 2);
 150         if (vflag > 1)
 151                 (void)printf("\n");
 152         (void)printf(" Hold time: ");
 153         relts_print(EXTRACT_16BITS(&bp[6]));
 154         if (vflag < 2)
 155                 return;
 156         bp += 8;
 157         len -= 8;
 158
 159         TCHECK2(bp[0], 4);
 160         maddrlen = bp[1];
 161         addrlen = bp[2];
 162         ngroups = bp[3];
 163         bp += 4;
 164         len -= 4;
 165         while (ngroups--) {
 166                 TCHECK2(bp[0], 4);
 167                 (void)printf("\n\tGroup: %s", ipaddr_string(bp));
 168                 TCHECK2(bp[4], 4);
 169                 if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
 170                         (void)printf("/%s", ipaddr_string(&bp[4]));
 171                 TCHECK2(bp[8], 4);
 172                 njoin = EXTRACT_16BITS(&bp[8]);
 173                 nprune = EXTRACT_16BITS(&bp[10]);
 174                 (void)printf(" joined: %d pruned: %d", njoin, nprune);
 175                 bp += 12;
 176                 len -= 12;
 177                 for (njp = 0; njp < (njoin + nprune); njp++) {
 178                         const char *type;
 179
 180                         if (njp < njoin)
 181                                 type = "Join ";
 182                         else
 183                                 type = "Prune";
 184                         TCHECK2(bp[0], 6);
 185                         (void)printf("\n\t%s %s%s%s%s/%d", type,
 186                             (bp[0] & 0x01) ? "Sparse " : "Dense ",
 187                             (bp[1] & 0x80) ? "WC " : "",
 188                             (bp[1] & 0x40) ? "RP " : "SPT ",
 189                         ipaddr_string(&bp[2]), bp[1] & 0x3f);
 190                         bp += 6;
 191                         len -= 6;
 192                 }
 193         }
 194         return;
 195 trunc:
 196         (void)printf("[|pim]");
 197         return;
 198 }
 199
 200 void
 201 pimv1_print(register const u_char *bp, register u_int len)
 202 {
 203         register const u_char *ep;
 204         register u_char type;
 205
 206         ep = (const u_char *)snapend;
 207         if (bp >= ep)
 208                 return;
 209
 210         TCHECK(bp[1]);
 211         type = bp[1];
 212
 213         switch (type) {
 214         case 0:
 215                 (void)printf(" Query");
 216                 if (TTEST(bp[8])) {
 217                         switch (bp[8] >> 4) {
 218                         case 0:
 219                                 (void)printf(" Dense-mode");
 220                                 break;
 221                         case 1:
 222                                 (void)printf(" Sparse-mode");
 223                                 break;
 224                         case 2:
 225                                 (void)printf(" Sparse-Dense-mode");
 226                                 break;
 227                         default:
 228                                 (void)printf(" mode-%d", bp[8] >> 4);
 229                                 break;
 230                         }
 231                 }
 232                 if (vflag) {
 233                         TCHECK2(bp[10],2);
 234                         (void)printf(" (Hold-time ");
 235                         relts_print(EXTRACT_16BITS(&bp[10]));
 236                         (void)printf(")");
 237                 }
 238                 break;
 239
 240         case 1:
 241                 (void)printf(" Register");
 242                 TCHECK2(bp[8], 20);                     /* ip header */
 243                 (void)printf(" for %s > %s", ipaddr_string(&bp[20]),
 244                     ipaddr_string(&bp[24]));
 245                 break;
 246         case 2:
 247                 (void)printf(" Register-Stop");
 248                 TCHECK2(bp[12], 4);
 249                 (void)printf(" for %s > %s", ipaddr_string(&bp[8]),
 250                     ipaddr_string(&bp[12]));
 251                 break;
 252         case 3:
 253                 (void)printf(" Join/Prune");
 254                 if (vflag)
 255                         pimv1_join_prune_print(&bp[8], len - 8);
 256                 break;
 257         case 4:
 258                 (void)printf(" RP-reachable");
 259                 if (vflag) {
 260                         TCHECK2(bp[22], 2);
 261                         (void)printf(" group %s",
 262                         ipaddr_string(&bp[8]));
 263                         if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
 264                                 (void)printf("/%s", ipaddr_string(&bp[12]));
 265                         (void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
 266                         relts_print(EXTRACT_16BITS(&bp[22]));
 267                 }
 268                 break;
 269         case 5:
 270                 (void)printf(" Assert");
 271                 TCHECK2(bp[16], 4);
 272                 (void)printf(" for %s > %s", ipaddr_string(&bp[16]),
 273                     ipaddr_string(&bp[8]));
 274                 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
 275                         (void)printf("/%s", ipaddr_string(&bp[12]));
 276                 TCHECK2(bp[24], 4);
 277                 (void)printf(" %s pref %d metric %d",
 278                     (bp[20] & 0x80) ? "RP-tree" : "SPT",
 279                 EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
 280                 EXTRACT_32BITS(&bp[24]));
 281                 break;
 282         case 6:
 283                 (void)printf(" Graft");
 284                 if (vflag)
 285                         pimv1_join_prune_print(&bp[8], len - 8);
 286                 break;
 287         case 7:
 288                 (void)printf(" Graft-ACK");
 289                 if (vflag)
 290                         pimv1_join_prune_print(&bp[8], len - 8);
 291                 break;
 292         case 8:
 293                 (void)printf(" Mode");
 294                 break;
 295         default:
 296                 (void)printf(" [type %d]", type);
 297                 break;
 298         }
 299         if ((bp[4] >> 4) != 1)
 300                 (void)printf(" [v%d]", bp[4] >> 4);
 301         return;
 302
 303 trunc:
 304         (void)printf("[|pim]");
 305         return;
 306 }
 307
 308 /*
 309  * auto-RP is a cisco protocol, documented at
 310  * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
 311  *
 312  * This implements version 1+, dated Sept 9, 1998.
 313  */
 314 void
 315 cisco_autorp_print(register const u_char *bp, register u_int len)
 316 {
 317         int type;
 318         int numrps;
 319         int hold;
 320
 321         TCHECK(bp[0]);
 322         (void)printf(" auto-rp ");
 323         type = bp[0];
 324         switch (type) {
 325         case 0x11:
 326                 (void)printf("candidate-advert");
 327                 break;
 328         case 0x12:
 329                 (void)printf("mapping");
 330                 break;
 331         default:
 332                 (void)printf("type-0x%02x", type);
 333                 break;
 334         }
 335
 336         TCHECK(bp[1]);
 337         numrps = bp[1];
 338
 339         TCHECK2(bp[2], 2);
 340         (void)printf(" Hold ");
 341         hold = EXTRACT_16BITS(&bp[2]);
 342         if (hold)
 343                 relts_print(EXTRACT_16BITS(&bp[2]));
 344         else
 345                 printf("FOREVER");
 346
 347         /* Next 4 bytes are reserved. */
 348
 349         bp += 8; len -= 8;
 350
 351         /*XXX skip unless -v? */
 352
 353         /*
 354          * Rest of packet:
 355          * numrps entries of the form:
 356          * 32 bits: RP
 357          * 6 bits: reserved
 358          * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
 359          * 8 bits: # of entries for this RP
 360          * each entry: 7 bits: reserved, 1 bit: negative,
 361          *             8 bits: mask 32 bits: source
 362          * lather, rinse, repeat.
 363          */
 364         while (numrps--) {
 365                 int nentries;
 366                 char s;
 367
 368                 TCHECK2(bp[0], 4);
 369                 (void)printf(" RP %s", ipaddr_string(bp));
 370                 TCHECK(bp[4]);
 371                 switch (bp[4] & 0x3) {
 372                 case 0: printf(" PIMv?");
 373                         break;
 374                 case 1: printf(" PIMv1");
 375                         break;
 376                 case 2: printf(" PIMv2");
 377                         break;
 378                 case 3: printf(" PIMv1+2");
 379                         break;
 380                 }
 381                 if (bp[4] & 0xfc)
 382                         (void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
 383                 TCHECK(bp[5]);
 384                 nentries = bp[5];
 385                 bp += 6; len -= 6;
 386                 s = ' ';
 387                 for (; nentries; nentries--) {
 388                         TCHECK2(bp[0], 6);
 389                         (void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
 390                             ipaddr_string(&bp[2]), bp[1]);
 391                         if (bp[0] & 0xfe)
 392                                 (void)printf("[rsvd=0x%02x]", bp[0] & 0xfe);
 393                         s = ',';
 394                         bp += 6; len -= 6;
 395                 }
 396         }
 397         return;
 398
 399 trunc:
 400         (void)printf("[|autorp]");
 401         return;
 402 }
 403
 404 void
 405 pim_print(register const u_char *bp, register u_int len)
 406 {
 407         register const u_char *ep;
 408         register struct pim *pim = (struct pim *)bp;
 409
 410         ep = (const u_char *)snapend;
 411         if (bp >= ep)
 412                 return;
 413 #ifdef notyet                   /* currently we see only version and type */
 414         TCHECK(pim->pim_rsv);
 415 #endif
 416
 417         switch (PIM_VER(pim->pim_typever)) {
 418         case 2:
 419             if (!vflag) {
 420                 printf("PIMv%u, %s, length: %u",
 421                        PIM_VER(pim->pim_typever),
 422                        tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
 423                        len);
 424                 return;
 425             } else {
 426                 printf("PIMv%u, length: %u\n\t%s",
 427                        PIM_VER(pim->pim_typever),
 428                        len,
 429                        tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)));
 430                 pimv2_print(bp, len);
 431             }
 432             break;
 433         default:
 434                 printf("PIMv%u, length: %u",
 435                        PIM_VER(pim->pim_typever),
 436                        len);
 437                 break;
 438         }
 439         return;
 440 }
 441
 442 /*
 443  * PIMv2 uses encoded address representations.
 444  *
 445  * The last PIM-SM I-D before RFC2117 was published specified the
 446  * following representation for unicast addresses.  However, RFC2117
 447  * specified no encoding for unicast addresses with the unicast
 448  * address length specified in the header.  Therefore, we have to
 449  * guess which encoding is being used (Cisco's PIMv2 implementation
 450  * uses the non-RFC encoding).  RFC2117 turns a previously "Reserved"
 451  * field into a 'unicast-address-length-in-bytes' field.  We guess
 452  * that it's the draft encoding if this reserved field is zero.
 453  *
 454  * RFC2362 goes back to the encoded format, and calls the addr length
 455  * field "reserved" again.
 456  *
 457  * The first byte is the address family, from:
 458  *
 459  *    0    Reserved
 460  *    1    IP (IP version 4)
 461  *    2    IP6 (IP version 6)
 462  *    3    NSAP
 463  *    4    HDLC (8-bit multidrop)
 464  *    5    BBN 1822
 465  *    6    802 (includes all 802 media plus Ethernet "canonical format")
 466  *    7    E.163
 467  *    8    E.164 (SMDS, Frame Relay, ATM)
 468  *    9    F.69 (Telex)
 469  *   10    X.121 (X.25, Frame Relay)
 470  *   11    IPX
 471  *   12    Appletalk
 472  *   13    Decnet IV
 473  *   14    Banyan Vines
 474  *   15    E.164 with NSAP format subaddress
 475  *
 476  * In addition, the second byte is an "Encoding".  0 is the default
 477  * encoding for the address family, and no other encodings are currently
 478  * specified.
 479  *
 480  */
 481
 482 static int pimv2_addr_len;
 483
 484 enum pimv2_addrtype {
 485         pimv2_unicast, pimv2_group, pimv2_source
 486 };
 487
 488 /*  0                   1                   2                   3
 489  *  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
 490  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 491  * | Addr Family   | Encoding Type |     Unicast Address           |
 492  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
 493  *  0                   1                   2                   3
 494  *  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
 495  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 496  * | Addr Family   | Encoding Type |   Reserved    |  Mask Len     |
 497  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 498  * |                Group multicast Address                        |
 499  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 500  *  0                   1                   2                   3
 501  *  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
 502  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 503  * | Addr Family   | Encoding Type | Rsrvd   |S|W|R|  Mask Len     |
 504  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 505  * |                        Source Address                         |
 506  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 507  */
 508 static int
 509 pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
 510 {
 511         int af;
 512         const char *afstr;
 513         int len, hdrlen;
 514
 515         TCHECK(bp[0]);
 516
 517         if (pimv2_addr_len == 0) {
 518                 TCHECK(bp[1]);
 519                 switch (bp[0]) {
 520                 case 1:
 521                         af = AF_INET;
 522                         afstr = "IPv4";
 523                         len = 4;
 524                         break;
 525 #ifdef INET6
 526                 case 2:
 527                         af = AF_INET6;
 528                         afstr = "IPv6";
 529                         len = 16;
 530                         break;
 531 #endif
 532                 default:
 533                         return -1;
 534                 }
 535                 if (bp[1] != 0)
 536                         return -1;
 537                 hdrlen = 2;
 538         } else {
 539                 switch (pimv2_addr_len) {
 540                 case 4:
 541                         af = AF_INET;
 542                         afstr = "IPv4";
 543                         break;
 544 #ifdef INET6
 545                 case 16:
 546                         af = AF_INET6;
 547                         afstr = "IPv6";
 548                         break;
 549 #endif
 550                 default:
 551                         return -1;
 552                         break;
 553                 }
 554                 len = pimv2_addr_len;
 555                 hdrlen = 0;
 556         }
 557
 558         bp += hdrlen;
 559         switch (at) {
 560         case pimv2_unicast:
 561                 TCHECK2(bp[0], len);
 562                 if (af == AF_INET) {
 563                         if (!silent)
 564                                 (void)printf("%s", ipaddr_string(bp));
 565                 }
 566 #ifdef INET6
 567                 else if (af == AF_INET6) {
 568                         if (!silent)
 569                                 (void)printf("%s", ip6addr_string(bp));
 570                 }
 571 #endif
 572                 return hdrlen + len;
 573         case pimv2_group:
 574         case pimv2_source:
 575                 TCHECK2(bp[0], len + 2);
 576                 if (af == AF_INET) {
 577                         if (!silent) {
 578                                 (void)printf("%s", ipaddr_string(bp + 2));
 579                                 if (bp[1] != 32)
 580                                         (void)printf("/%u", bp[1]);
 581                         }
 582                 }
 583 #ifdef INET6
 584                 else if (af == AF_INET6) {
 585                         if (!silent) {
 586                                 (void)printf("%s", ip6addr_string(bp + 2));
 587                                 if (bp[1] != 128)
 588                                         (void)printf("/%u", bp[1]);
 589                         }
 590                 }
 591 #endif
 592                 if (bp[0] && !silent) {
 593                         if (at == pimv2_group) {
 594                                 (void)printf("(0x%02x)", bp[0]);
 595                         } else {
 596                                 (void)printf("(%s%s%s",
 597                                         bp[0] & 0x04 ? "S" : "",
 598                                         bp[0] & 0x02 ? "W" : "",
 599                                         bp[0] & 0x01 ? "R" : "");
 600                                 if (bp[0] & 0xf8) {
 601                                         (void) printf("+0x%02x", bp[0] & 0xf8);
 602                                 }
 603                                 (void)printf(")");
 604                         }
 605                 }
 606                 return hdrlen + 2 + len;
 607         default:
 608                 return -1;
 609         }
 610 trunc:
 611         return -1;
 612 }
 613
 614 static void
 615 pimv2_print(register const u_char *bp, register u_int len)
 616 {
 617         register const u_char *ep;
 618         register struct pim *pim = (struct pim *)bp;
 619         int advance;
 620
 621         ep = (const u_char *)snapend;
 622         if (bp >= ep)
 623                 return;
 624         if (ep > bp + len)
 625                 ep = bp + len;
 626         TCHECK(pim->pim_rsv);
 627         pimv2_addr_len = pim->pim_rsv;
 628         if (pimv2_addr_len != 0)
 629                 (void)printf(", RFC2117-encoding");
 630
 631         switch (PIM_TYPE(pim->pim_typever)) {
 632         case PIMV2_TYPE_HELLO:
 633             {
 634                 u_int16_t otype, olen;
 635                 bp += 4;
 636                 while (bp < ep) {
 637                         TCHECK2(bp[0], 4);
 638                         otype = EXTRACT_16BITS(&bp[0]);
 639                         olen = EXTRACT_16BITS(&bp[2]);
 640                         TCHECK2(bp[0], 4 + olen);
 641
 642                         printf("\n\t  %s Option (%u), length: %u, Value: ",
 643                                tok2str( pimv2_hello_option_values,"Unknown",otype),
 644                                otype,
 645                                olen);
 646                         bp += 4;
 647
 648                         switch (otype) {
 649                         case PIMV2_HELLO_OPTION_HOLDTIME:
 650                                 relts_print(EXTRACT_16BITS(bp));
 651                                 break;
 652
 653                         case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
 654                                 if (olen != 4) {
 655                                         (void)printf("ERROR: Option Lenght != 4 Bytes (%u)", olen);
 656                                 } else {
 657                                         char t_bit;
 658                                         u_int16_t lan_delay, override_interval;
 659                                         lan_delay = EXTRACT_16BITS(bp);
 660                                         override_interval = EXTRACT_16BITS(bp+2);
 661                                         t_bit = (lan_delay & 0x8000)? 1 : 0;
 662                                         lan_delay &= ~0x8000;
 663                                         (void)printf("\n\t    T-bit=%d, LAN delay %dms, Override interval %dms",
 664                                         t_bit, lan_delay, override_interval);
 665                                 }
 666                                 break;
 667
 668                         case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
 669                         case PIMV2_HELLO_OPTION_DR_PRIORITY:
 670                                 switch (olen) {
 671                                 case 0:
 672                                     printf("Bi-Directional Capability (Old)");
 673                                     break;
 674                                 case 4:
 675                                     printf("%u", EXTRACT_32BITS(bp));
 676                                     break;
 677                                 default:
 678                                     printf("ERROR: Option Lenght != 4 Bytes (%u)", olen);
 679                                     break;
 680                                 }
 681                                 break;
 682
 683                         case PIMV2_HELLO_OPTION_GENID:
 684                                 (void)printf("0x%08x", EXTRACT_32BITS(bp));
 685                                 break;
 686
 687                         case PIMV2_HELLO_OPTION_REFRESH_CAP:
 688                                 (void)printf("v%d", *bp);
 689                                 if (*(bp+1) != 0) {
 690                                     (void)printf(", interval ");
 691                                     relts_print(*(bp+1));
 692                                 }
 693                                 if (EXTRACT_16BITS(bp+2) != 0) {
 694                                     (void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
 695                                 }
 696                                 break;
 697
 698                         case  PIMV2_HELLO_OPTION_BIDIR_CAP:
 699                                 break;
 700
 701                         case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
 702                         case PIMV2_HELLO_OPTION_ADDRESS_LIST:
 703                                 if (vflag > 1) {
 704                                         const u_char *ptr = bp;
 705                                         while (ptr < (bp+olen)) {
 706                                                 int advance;
 707
 708                                                 printf("\n\t    ");
 709                                                 advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
 710                                                 if (advance < 0) {
 711                                                         printf("...");
 712                                                         break;
 713                                                 }
 714                                                 ptr += advance;
 715                                         }
 716                                 }
 717                                 break;
 718                         default:
 719                                 if (vflag <= 1)
 720                                     print_unknown_data(bp,"\n\t    ",olen);
 721                                 break;
 722                         }
 723                         /* do we want to see an additionally hexdump ? */
 724                         if (vflag> 1)
 725                             print_unknown_data(bp,"\n\t    ",olen);
 726                         bp += olen;
 727                 }
 728                 break;
 729             }
 730
 731         case PIMV2_TYPE_REGISTER:
 732         {
 733                 struct ip *ip;
 734
 735                 if (vflag && bp + 8 <= ep) {
 736                         (void)printf(" %s%s", bp[4] & 0x80 ? "B" : "",
 737                                 bp[4] & 0x40 ? "N" : "");
 738                 }
 739                 bp += 8; len -= 8;
 740
 741                 /* encapsulated multicast packet */
 742                 if (bp >= ep)
 743                         break;
 744                 ip = (struct ip *)bp;
 745                 switch (IP_V(ip)) {
 746                 case 4: /* IPv4 */
 747                         printf(" ");
 748                         ip_print(gndo, bp, len);
 749                         break;
 750 #ifdef INET6
 751                 case 6: /* IPv6 */
 752                         printf(" ");
 753                         ip6_print(bp, len);
 754                         break;
 755 #endif
 756                 default:
 757                         (void)printf(" IP ver %d", IP_V(ip));
 758                         break;
 759                 }
 760                 break;
 761         }
 762
 763         case PIMV2_TYPE_REGISTER_STOP:
 764                 bp += 4; len -= 4;
 765                 if (bp >= ep)
 766                         break;
 767                 (void)printf(" group=");
 768                 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
 769                         (void)printf("...");
 770                         break;
 771                 }
 772                 bp += advance; len -= advance;
 773                 if (bp >= ep)
 774                         break;
 775                 (void)printf(" source=");
 776                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
 777                         (void)printf("...");
 778                         break;
 779                 }
 780                 bp += advance; len -= advance;
 781                 break;
 782
 783         case PIMV2_TYPE_JOIN_PRUNE:
 784         case PIMV2_TYPE_GRAFT:
 785         case PIMV2_TYPE_GRAFT_ACK:
 786
 787
 788         /*
 789          * 0                   1                   2                   3
 790          *   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
 791          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 792          *  |PIM Ver| Type  | Addr length   |           Checksum            |
 793          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 794          *  |             Unicast-Upstream Neighbor Address                 |
 795          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 796          *  |  Reserved     | Num groups    |          Holdtime             |
 797          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 798          *  |            Encoded-Multicast Group Address-1                  |
 799          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 800          *  |   Number of Joined  Sources   |   Number of Pruned Sources    |
 801          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 802          *  |               Encoded-Joined Source Address-1                 |
 803          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 804          *  |                             .                                 |
 805          *  |                             .                                 |
 806          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 807          *  |               Encoded-Joined Source Address-n                 |
 808          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 809          *  |               Encoded-Pruned Source Address-1                 |
 810          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 811          *  |                             .                                 |
 812          *  |                             .                                 |
 813          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 814          *  |               Encoded-Pruned Source Address-n                 |
 815          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 816          *  |                           .                                   |
 817          *  |                           .                                   |
 818          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 819          *  |                Encoded-Multicast Group Address-n              |
 820          *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 821          */
 822
 823             {
 824                 u_int8_t ngroup;
 825                 u_int16_t holdtime;
 826                 u_int16_t njoin;
 827                 u_int16_t nprune;
 828                 int i, j;
 829
 830                 bp += 4; len -= 4;
 831                 if (PIM_TYPE(pim->pim_typever) != 7) {  /*not for Graft-ACK*/
 832                         if (bp >= ep)
 833                                 break;
 834                         (void)printf(", upstream-neighbor: ");
 835                         if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
 836                                 (void)printf("...");
 837                                 break;
 838                         }
 839                         bp += advance; len -= advance;
 840                 }
 841                 if (bp + 4 > ep)
 842                         break;
 843                 ngroup = bp[1];
 844                 holdtime = EXTRACT_16BITS(&bp[2]);
 845                 (void)printf("\n\t  %u group(s)", ngroup);
 846                 if (PIM_TYPE(pim->pim_typever) != 7) {  /*not for Graft-ACK*/
 847                         (void)printf(", holdtime: ");
 848                         if (holdtime == 0xffff)
 849                                 (void)printf("infinite");
 850                         else
 851                                 relts_print(holdtime);
 852                 }
 853                 bp += 4; len -= 4;
 854                 for (i = 0; i < ngroup; i++) {
 855                         if (bp >= ep)
 856                                 goto jp_done;
 857                         (void)printf("\n\t    group #%u: ", i+1);
 858                         if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
 859                                 (void)printf("...)");
 860                                 goto jp_done;
 861                         }
 862                         bp += advance; len -= advance;
 863                         if (bp + 4 > ep) {
 864                                 (void)printf("...)");
 865                                 goto jp_done;
 866                         }
 867                         njoin = EXTRACT_16BITS(&bp[0]);
 868                         nprune = EXTRACT_16BITS(&bp[2]);
 869                         (void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
 870                         bp += 4; len -= 4;
 871                         for (j = 0; j < njoin; j++) {
 872                                 (void)printf("\n\t      joined source #%u: ",j+1);
 873                                 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
 874                                         (void)printf("...)");
 875                                         goto jp_done;
 876                                 }
 877                                 bp += advance; len -= advance;
 878                         }
 879                         for (j = 0; j < nprune; j++) {
 880                                 (void)printf("\n\t      pruned source #%u: ",j+1);
 881                                 if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
 882                                         (void)printf("...)");
 883                                         goto jp_done;
 884                                 }
 885                                 bp += advance; len -= advance;
 886                         }
 887                 }
 888         jp_done:
 889                 break;
 890             }
 891
 892         case PIMV2_TYPE_BOOTSTRAP:
 893         {
 894                 int i, j, frpcnt;
 895                 bp += 4;
 896
 897                 /* Fragment Tag, Hash Mask len, and BSR-priority */
 898                 if (bp + sizeof(u_int16_t) >= ep) break;
 899                 (void)printf(" tag=%x", EXTRACT_16BITS(bp));
 900                 bp += sizeof(u_int16_t);
 901                 if (bp >= ep) break;
 902                 (void)printf(" hashmlen=%d", bp[0]);
 903                 if (bp + 1 >= ep) break;
 904                 (void)printf(" BSRprio=%d", bp[1]);
 905                 bp += 2;
 906
 907                 /* Encoded-Unicast-BSR-Address */
 908                 if (bp >= ep) break;
 909                 (void)printf(" BSR=");
 910                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
 911                         (void)printf("...");
 912                         break;
 913                 }
 914                 bp += advance;
 915
 916                 for (i = 0; bp < ep; i++) {
 917                         /* Encoded-Group Address */
 918                         (void)printf(" (group%d: ", i);
 919                         if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
 920                             < 0) {
 921                                 (void)printf("...)");
 922                                 goto bs_done;
 923                         }
 924                         bp += advance;
 925
 926                         /* RP-Count, Frag RP-Cnt, and rsvd */
 927                         if (bp >= ep) {
 928                                 (void)printf("...)");
 929                                 goto bs_done;
 930                         }
 931                         (void)printf(" RPcnt=%d", bp[0]);
 932                         if (bp + 1 >= ep) {
 933                                 (void)printf("...)");
 934                                 goto bs_done;
 935                         }
 936                         (void)printf(" FRPcnt=%d", frpcnt = bp[1]);
 937                         bp += 4;
 938
 939                         for (j = 0; j < frpcnt && bp < ep; j++) {
 940                                 /* each RP info */
 941                                 (void)printf(" RP%d=", j);
 942                                 if ((advance = pimv2_addr_print(bp,
 943                                                                 pimv2_unicast,
 944                                                                 0)) < 0) {
 945                                         (void)printf("...)");
 946                                         goto bs_done;
 947                                 }
 948                                 bp += advance;
 949
 950                                 if (bp + 1 >= ep) {
 951                                         (void)printf("...)");
 952                                         goto bs_done;
 953                                 }
 954                                 (void)printf(",holdtime=");
 955                                 relts_print(EXTRACT_16BITS(bp));
 956                                 if (bp + 2 >= ep) {
 957                                         (void)printf("...)");
 958                                         goto bs_done;
 959                                 }
 960                                 (void)printf(",prio=%d", bp[2]);
 961                                 bp += 4;
 962                         }
 963                         (void)printf(")");
 964                 }
 965            bs_done:
 966                 break;
 967         }
 968         case PIMV2_TYPE_ASSERT:
 969                 bp += 4; len -= 4;
 970                 if (bp >= ep)
 971                         break;
 972                 (void)printf(" group=");
 973                 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
 974                         (void)printf("...");
 975                         break;
 976                 }
 977                 bp += advance; len -= advance;
 978                 if (bp >= ep)
 979                         break;
 980                 (void)printf(" src=");
 981                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
 982                         (void)printf("...");
 983                         break;
 984                 }
 985                 bp += advance; len -= advance;
 986                 if (bp + 8 > ep)
 987                         break;
 988                 if (bp[0] & 0x80)
 989                         (void)printf(" RPT");
 990                 (void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
 991                 (void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
 992                 break;
 993
 994         case PIMV2_TYPE_CANDIDATE_RP:
 995         {
 996                 int i, pfxcnt;
 997                 bp += 4;
 998
 999                 /* Prefix-Cnt, Priority, and Holdtime */
1000                 if (bp >= ep) break;
1001                 (void)printf(" prefix-cnt=%d", bp[0]);
1002                 pfxcnt = bp[0];
1003                 if (bp + 1 >= ep) break;
1004                 (void)printf(" prio=%d", bp[1]);
1005                 if (bp + 3 >= ep) break;
1006                 (void)printf(" holdtime=");
1007                 relts_print(EXTRACT_16BITS(&bp[2]));
1008                 bp += 4;
1009
1010                 /* Encoded-Unicast-RP-Address */
1011                 if (bp >= ep) break;
1012                 (void)printf(" RP=");
1013                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1014                         (void)printf("...");
1015                         break;
1016                 }
1017                 bp += advance;
1018
1019                 /* Encoded-Group Addresses */
1020                 for (i = 0; i < pfxcnt && bp < ep; i++) {
1021                         (void)printf(" Group%d=", i);
1022                         if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
1023                             < 0) {
1024                                 (void)printf("...");
1025                                 break;
1026                         }
1027                         bp += advance;
1028                 }
1029                 break;
1030         }
1031
1032         case PIMV2_TYPE_PRUNE_REFRESH:
1033                 (void)printf(" src=");
1034                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1035                         (void)printf("...");
1036                         break;
1037                 }
1038                 bp += advance;
1039                 (void)printf(" grp=");
1040                 if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
1041                         (void)printf("...");
1042                         break;
1043                 }
1044                 bp += advance;
1045                 (void)printf(" forwarder=");
1046                 if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
1047                         (void)printf("...");
1048                         break;
1049                 }
1050                 bp += advance;
1051                 TCHECK2(bp[0], 2);
1052                 (void)printf(" TUNR ");
1053                 relts_print(EXTRACT_16BITS(bp));
1054                 break;
1055
1056
1057          default:
1058                 (void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
1059                 break;
1060         }
1061
1062         return;
1063
1064 trunc:
1065         (void)printf("[|pim]");
1066 }
1067
1068 /*
1069  * Local Variables:
1070  * c-style: whitesmith
1071  * c-basic-offset: 8
1072  * End:
1073  */