1 /* 2 * Copyright (c) 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 /* \summary: Protocol Independent Multicast (PIM) printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <netdissect-stdinc.h> 29 30 #include "netdissect.h" 31 #include "addrtoname.h" 32 #include "extract.h" 33 34 #include "ip.h" 35 #include "ip6.h" 36 #include "ipproto.h" 37 38 #define PIMV1_TYPE_QUERY 0 39 #define PIMV1_TYPE_REGISTER 1 40 #define PIMV1_TYPE_REGISTER_STOP 2 41 #define PIMV1_TYPE_JOIN_PRUNE 3 42 #define PIMV1_TYPE_RP_REACHABILITY 4 43 #define PIMV1_TYPE_ASSERT 5 44 #define PIMV1_TYPE_GRAFT 6 45 #define PIMV1_TYPE_GRAFT_ACK 7 46 47 static const struct tok pimv1_type_str[] = { 48 { PIMV1_TYPE_QUERY, "Query" }, 49 { PIMV1_TYPE_REGISTER, "Register" }, 50 { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" }, 51 { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" }, 52 { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" }, 53 { PIMV1_TYPE_ASSERT, "Assert" }, 54 { PIMV1_TYPE_GRAFT, "Graft" }, 55 { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" }, 56 { 0, NULL } 57 }; 58 59 #define PIMV2_TYPE_HELLO 0 60 #define PIMV2_TYPE_REGISTER 1 61 #define PIMV2_TYPE_REGISTER_STOP 2 62 #define PIMV2_TYPE_JOIN_PRUNE 3 63 #define PIMV2_TYPE_BOOTSTRAP 4 64 #define PIMV2_TYPE_ASSERT 5 65 #define PIMV2_TYPE_GRAFT 6 66 #define PIMV2_TYPE_GRAFT_ACK 7 67 #define PIMV2_TYPE_CANDIDATE_RP 8 68 #define PIMV2_TYPE_PRUNE_REFRESH 9 69 #define PIMV2_TYPE_DF_ELECTION 10 70 #define PIMV2_TYPE_ECMP_REDIRECT 11 71 72 static const struct tok pimv2_type_values[] = { 73 { PIMV2_TYPE_HELLO, "Hello" }, 74 { PIMV2_TYPE_REGISTER, "Register" }, 75 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" }, 76 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" }, 77 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" }, 78 { PIMV2_TYPE_ASSERT, "Assert" }, 79 { PIMV2_TYPE_GRAFT, "Graft" }, 80 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" }, 81 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" }, 82 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" }, 83 { PIMV2_TYPE_DF_ELECTION, "DF Election" }, 84 { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" }, 85 { 0, NULL} 86 }; 87 88 #define PIMV2_HELLO_OPTION_HOLDTIME 1 89 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2 90 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18 91 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19 92 #define PIMV2_HELLO_OPTION_GENID 20 93 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21 94 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22 95 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24 96 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001 97 98 static const struct tok pimv2_hello_option_values[] = { 99 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" }, 100 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" }, 101 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" }, 102 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" }, 103 { PIMV2_HELLO_OPTION_GENID, "Generation ID" }, 104 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" }, 105 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" }, 106 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" }, 107 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" }, 108 { 0, NULL} 109 }; 110 111 #define PIMV2_REGISTER_FLAG_LEN 4 112 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000 113 #define PIMV2_REGISTER_FLAG_NULL 0x40000000 114 115 static const struct tok pimv2_register_flag_values[] = { 116 { PIMV2_REGISTER_FLAG_BORDER, "Border" }, 117 { PIMV2_REGISTER_FLAG_NULL, "Null" }, 118 { 0, NULL} 119 }; 120 121 /* 122 * XXX: We consider a case where IPv6 is not ready yet for portability, 123 * but PIM dependent defintions should be independent of IPv6... 124 */ 125 126 struct pim { 127 uint8_t pim_typever; 128 /* upper 4bit: PIM version number; 2 for PIMv2 */ 129 /* lower 4bit: the PIM message type, currently they are: 130 * Hello, Register, Register-Stop, Join/Prune, 131 * Bootstrap, Assert, Graft (PIM-DM only), 132 * Graft-Ack (PIM-DM only), C-RP-Adv 133 */ 134 #define PIM_VER(x) (((x) & 0xf0) >> 4) 135 #define PIM_TYPE(x) ((x) & 0x0f) 136 u_char pim_rsv; /* Reserved */ 137 u_short pim_cksum; /* IP style check sum */ 138 }; 139 140 static void pimv2_print(netdissect_options *, register const u_char *bp, register u_int len, const u_char *); 141 142 static void 143 pimv1_join_prune_print(netdissect_options *ndo, 144 register const u_char *bp, register u_int len) 145 { 146 int ngroups, njoin, nprune; 147 int njp; 148 149 /* If it's a single group and a single source, use 1-line output. */ 150 if (ND_TTEST2(bp[0], 30) && bp[11] == 1 && 151 ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) { 152 int hold; 153 154 ND_PRINT((ndo, " RPF %s ", ipaddr_string(ndo, bp))); 155 hold = EXTRACT_16BITS(&bp[6]); 156 if (hold != 180) { 157 ND_PRINT((ndo, "Hold ")); 158 unsigned_relts_print(ndo, hold); 159 } 160 ND_PRINT((ndo, "%s (%s/%d, %s", njoin ? "Join" : "Prune", 161 ipaddr_string(ndo, &bp[26]), bp[25] & 0x3f, 162 ipaddr_string(ndo, &bp[12]))); 163 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff) 164 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[16]))); 165 ND_PRINT((ndo, ") %s%s %s", 166 (bp[24] & 0x01) ? "Sparse" : "Dense", 167 (bp[25] & 0x80) ? " WC" : "", 168 (bp[25] & 0x40) ? "RP" : "SPT")); 169 return; 170 } 171 172 if (len < sizeof(struct in_addr)) 173 goto trunc; 174 ND_TCHECK2(bp[0], sizeof(struct in_addr)); 175 if (ndo->ndo_vflag > 1) 176 ND_PRINT((ndo, "\n")); 177 ND_PRINT((ndo, " Upstream Nbr: %s", ipaddr_string(ndo, bp))); 178 bp += 4; 179 len -= 4; 180 if (len < 4) 181 goto trunc; 182 ND_TCHECK2(bp[2], 2); 183 if (ndo->ndo_vflag > 1) 184 ND_PRINT((ndo, "\n")); 185 ND_PRINT((ndo, " Hold time: ")); 186 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); 187 if (ndo->ndo_vflag < 2) 188 return; 189 bp += 4; 190 len -= 4; 191 192 if (len < 4) 193 goto trunc; 194 ND_TCHECK2(bp[0], 4); 195 ngroups = bp[3]; 196 bp += 4; 197 len -= 4; 198 while (ngroups--) { 199 /* 200 * XXX - does the address have length "addrlen" and the 201 * mask length "maddrlen"? 202 */ 203 if (len < 4) 204 goto trunc; 205 ND_TCHECK2(bp[0], sizeof(struct in_addr)); 206 ND_PRINT((ndo, "\n\tGroup: %s", ipaddr_string(ndo, bp))); 207 bp += 4; 208 len -= 4; 209 if (len < 4) 210 goto trunc; 211 ND_TCHECK2(bp[0], sizeof(struct in_addr)); 212 if (EXTRACT_32BITS(&bp[0]) != 0xffffffff) 213 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[0]))); 214 bp += 4; 215 len -= 4; 216 if (len < 4) 217 goto trunc; 218 ND_TCHECK2(bp[0], 4); 219 njoin = EXTRACT_16BITS(&bp[0]); 220 nprune = EXTRACT_16BITS(&bp[2]); 221 ND_PRINT((ndo, " joined: %d pruned: %d", njoin, nprune)); 222 bp += 4; 223 len -= 4; 224 for (njp = 0; njp < (njoin + nprune); njp++) { 225 const char *type; 226 227 if (njp < njoin) 228 type = "Join "; 229 else 230 type = "Prune"; 231 if (len < 6) 232 goto trunc; 233 ND_TCHECK2(bp[0], 6); 234 ND_PRINT((ndo, "\n\t%s %s%s%s%s/%d", type, 235 (bp[0] & 0x01) ? "Sparse " : "Dense ", 236 (bp[1] & 0x80) ? "WC " : "", 237 (bp[1] & 0x40) ? "RP " : "SPT ", 238 ipaddr_string(ndo, &bp[2]), 239 bp[1] & 0x3f)); 240 bp += 6; 241 len -= 6; 242 } 243 } 244 return; 245 trunc: 246 ND_PRINT((ndo, "[|pim]")); 247 return; 248 } 249 250 void 251 pimv1_print(netdissect_options *ndo, 252 register const u_char *bp, register u_int len) 253 { 254 register u_char type; 255 256 ND_TCHECK(bp[1]); 257 type = bp[1]; 258 259 ND_PRINT((ndo, " %s", tok2str(pimv1_type_str, "[type %u]", type))); 260 switch (type) { 261 case PIMV1_TYPE_QUERY: 262 if (ND_TTEST(bp[8])) { 263 switch (bp[8] >> 4) { 264 case 0: 265 ND_PRINT((ndo, " Dense-mode")); 266 break; 267 case 1: 268 ND_PRINT((ndo, " Sparse-mode")); 269 break; 270 case 2: 271 ND_PRINT((ndo, " Sparse-Dense-mode")); 272 break; 273 default: 274 ND_PRINT((ndo, " mode-%d", bp[8] >> 4)); 275 break; 276 } 277 } 278 if (ndo->ndo_vflag) { 279 ND_TCHECK2(bp[10],2); 280 ND_PRINT((ndo, " (Hold-time ")); 281 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[10])); 282 ND_PRINT((ndo, ")")); 283 } 284 break; 285 286 case PIMV1_TYPE_REGISTER: 287 ND_TCHECK2(bp[8], 20); /* ip header */ 288 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[20]), 289 ipaddr_string(ndo, &bp[24]))); 290 break; 291 case PIMV1_TYPE_REGISTER_STOP: 292 ND_TCHECK2(bp[12], sizeof(struct in_addr)); 293 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[8]), 294 ipaddr_string(ndo, &bp[12]))); 295 break; 296 case PIMV1_TYPE_RP_REACHABILITY: 297 if (ndo->ndo_vflag) { 298 ND_TCHECK2(bp[22], 2); 299 ND_PRINT((ndo, " group %s", ipaddr_string(ndo, &bp[8]))); 300 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff) 301 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12]))); 302 ND_PRINT((ndo, " RP %s hold ", ipaddr_string(ndo, &bp[16]))); 303 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[22])); 304 } 305 break; 306 case PIMV1_TYPE_ASSERT: 307 ND_TCHECK2(bp[16], sizeof(struct in_addr)); 308 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[16]), 309 ipaddr_string(ndo, &bp[8]))); 310 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff) 311 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12]))); 312 ND_TCHECK2(bp[24], 4); 313 ND_PRINT((ndo, " %s pref %d metric %d", 314 (bp[20] & 0x80) ? "RP-tree" : "SPT", 315 EXTRACT_32BITS(&bp[20]) & 0x7fffffff, 316 EXTRACT_32BITS(&bp[24]))); 317 break; 318 case PIMV1_TYPE_JOIN_PRUNE: 319 case PIMV1_TYPE_GRAFT: 320 case PIMV1_TYPE_GRAFT_ACK: 321 if (ndo->ndo_vflag) { 322 if (len < 8) 323 goto trunc; 324 pimv1_join_prune_print(ndo, &bp[8], len - 8); 325 } 326 break; 327 } 328 ND_TCHECK(bp[4]); 329 if ((bp[4] >> 4) != 1) 330 ND_PRINT((ndo, " [v%d]", bp[4] >> 4)); 331 return; 332 333 trunc: 334 ND_PRINT((ndo, "[|pim]")); 335 return; 336 } 337 338 /* 339 * auto-RP is a cisco protocol, documented at 340 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt 341 * 342 * This implements version 1+, dated Sept 9, 1998. 343 */ 344 void 345 cisco_autorp_print(netdissect_options *ndo, 346 register const u_char *bp, register u_int len) 347 { 348 int type; 349 int numrps; 350 int hold; 351 352 if (len < 8) 353 goto trunc; 354 ND_TCHECK(bp[0]); 355 ND_PRINT((ndo, " auto-rp ")); 356 type = bp[0]; 357 switch (type) { 358 case 0x11: 359 ND_PRINT((ndo, "candidate-advert")); 360 break; 361 case 0x12: 362 ND_PRINT((ndo, "mapping")); 363 break; 364 default: 365 ND_PRINT((ndo, "type-0x%02x", type)); 366 break; 367 } 368 369 ND_TCHECK(bp[1]); 370 numrps = bp[1]; 371 372 ND_TCHECK2(bp[2], 2); 373 ND_PRINT((ndo, " Hold ")); 374 hold = EXTRACT_16BITS(&bp[2]); 375 if (hold) 376 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); 377 else 378 ND_PRINT((ndo, "FOREVER")); 379 380 /* Next 4 bytes are reserved. */ 381 382 bp += 8; len -= 8; 383 384 /*XXX skip unless -v? */ 385 386 /* 387 * Rest of packet: 388 * numrps entries of the form: 389 * 32 bits: RP 390 * 6 bits: reserved 391 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2". 392 * 8 bits: # of entries for this RP 393 * each entry: 7 bits: reserved, 1 bit: negative, 394 * 8 bits: mask 32 bits: source 395 * lather, rinse, repeat. 396 */ 397 while (numrps--) { 398 int nentries; 399 char s; 400 401 if (len < 4) 402 goto trunc; 403 ND_TCHECK2(bp[0], 4); 404 ND_PRINT((ndo, " RP %s", ipaddr_string(ndo, bp))); 405 bp += 4; 406 len -= 4; 407 if (len < 1) 408 goto trunc; 409 ND_TCHECK(bp[0]); 410 switch (bp[0] & 0x3) { 411 case 0: ND_PRINT((ndo, " PIMv?")); 412 break; 413 case 1: ND_PRINT((ndo, " PIMv1")); 414 break; 415 case 2: ND_PRINT((ndo, " PIMv2")); 416 break; 417 case 3: ND_PRINT((ndo, " PIMv1+2")); 418 break; 419 } 420 if (bp[0] & 0xfc) 421 ND_PRINT((ndo, " [rsvd=0x%02x]", bp[0] & 0xfc)); 422 bp += 1; 423 len -= 1; 424 if (len < 1) 425 goto trunc; 426 ND_TCHECK(bp[0]); 427 nentries = bp[0]; 428 bp += 1; 429 len -= 1; 430 s = ' '; 431 for (; nentries; nentries--) { 432 if (len < 6) 433 goto trunc; 434 ND_TCHECK2(bp[0], 6); 435 ND_PRINT((ndo, "%c%s%s/%d", s, bp[0] & 1 ? "!" : "", 436 ipaddr_string(ndo, &bp[2]), bp[1])); 437 if (bp[0] & 0x02) { 438 ND_PRINT((ndo, " bidir")); 439 } 440 if (bp[0] & 0xfc) { 441 ND_PRINT((ndo, "[rsvd=0x%02x]", bp[0] & 0xfc)); 442 } 443 s = ','; 444 bp += 6; len -= 6; 445 } 446 } 447 return; 448 449 trunc: 450 ND_PRINT((ndo, "[|autorp]")); 451 return; 452 } 453 454 void 455 pim_print(netdissect_options *ndo, 456 register const u_char *bp, register u_int len, const u_char *bp2) 457 { 458 register const struct pim *pim = (const struct pim *)bp; 459 460 #ifdef notyet /* currently we see only version and type */ 461 ND_TCHECK(pim->pim_rsv); 462 #endif 463 464 ND_TCHECK(pim->pim_typever); 465 switch (PIM_VER(pim->pim_typever)) { 466 case 2: 467 if (!ndo->ndo_vflag) { 468 ND_PRINT((ndo, "PIMv%u, %s, length %u", 469 PIM_VER(pim->pim_typever), 470 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)), 471 len)); 472 return; 473 } else { 474 ND_PRINT((ndo, "PIMv%u, length %u\n\t%s", 475 PIM_VER(pim->pim_typever), 476 len, 477 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)))); 478 pimv2_print(ndo, bp, len, bp2); 479 } 480 break; 481 default: 482 ND_PRINT((ndo, "PIMv%u, length %u", 483 PIM_VER(pim->pim_typever), 484 len)); 485 break; 486 } 487 return; 488 489 trunc: 490 ND_PRINT((ndo, "[|pim]")); 491 return; 492 } 493 494 /* 495 * PIMv2 uses encoded address representations. 496 * 497 * The last PIM-SM I-D before RFC2117 was published specified the 498 * following representation for unicast addresses. However, RFC2117 499 * specified no encoding for unicast addresses with the unicast 500 * address length specified in the header. Therefore, we have to 501 * guess which encoding is being used (Cisco's PIMv2 implementation 502 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved" 503 * field into a 'unicast-address-length-in-bytes' field. We guess 504 * that it's the draft encoding if this reserved field is zero. 505 * 506 * RFC2362 goes back to the encoded format, and calls the addr length 507 * field "reserved" again. 508 * 509 * The first byte is the address family, from: 510 * 511 * 0 Reserved 512 * 1 IP (IP version 4) 513 * 2 IP6 (IP version 6) 514 * 3 NSAP 515 * 4 HDLC (8-bit multidrop) 516 * 5 BBN 1822 517 * 6 802 (includes all 802 media plus Ethernet "canonical format") 518 * 7 E.163 519 * 8 E.164 (SMDS, Frame Relay, ATM) 520 * 9 F.69 (Telex) 521 * 10 X.121 (X.25, Frame Relay) 522 * 11 IPX 523 * 12 Appletalk 524 * 13 Decnet IV 525 * 14 Banyan Vines 526 * 15 E.164 with NSAP format subaddress 527 * 528 * In addition, the second byte is an "Encoding". 0 is the default 529 * encoding for the address family, and no other encodings are currently 530 * specified. 531 * 532 */ 533 534 enum pimv2_addrtype { 535 pimv2_unicast, pimv2_group, pimv2_source 536 }; 537 538 /* 0 1 2 3 539 * 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 1 540 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 541 * | Addr Family | Encoding Type | Unicast Address | 542 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++ 543 * 0 1 2 3 544 * 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 1 545 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 546 * | Addr Family | Encoding Type | Reserved | Mask Len | 547 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 548 * | Group multicast Address | 549 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 550 * 0 1 2 3 551 * 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 1 552 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 553 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len | 554 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 555 * | Source Address | 556 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 557 */ 558 static int 559 pimv2_addr_print(netdissect_options *ndo, 560 const u_char *bp, u_int len, enum pimv2_addrtype at, 561 u_int addr_len, int silent) 562 { 563 int af; 564 int hdrlen; 565 566 if (addr_len == 0) { 567 if (len < 2) 568 goto trunc; 569 ND_TCHECK(bp[1]); 570 switch (bp[0]) { 571 case 1: 572 af = AF_INET; 573 addr_len = (u_int)sizeof(struct in_addr); 574 break; 575 case 2: 576 af = AF_INET6; 577 addr_len = (u_int)sizeof(struct in6_addr); 578 break; 579 default: 580 return -1; 581 } 582 if (bp[1] != 0) 583 return -1; 584 hdrlen = 2; 585 } else { 586 switch (addr_len) { 587 case sizeof(struct in_addr): 588 af = AF_INET; 589 break; 590 case sizeof(struct in6_addr): 591 af = AF_INET6; 592 break; 593 default: 594 return -1; 595 break; 596 } 597 hdrlen = 0; 598 } 599 600 bp += hdrlen; 601 len -= hdrlen; 602 switch (at) { 603 case pimv2_unicast: 604 if (len < addr_len) 605 goto trunc; 606 ND_TCHECK2(bp[0], addr_len); 607 if (af == AF_INET) { 608 if (!silent) 609 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp))); 610 } 611 else if (af == AF_INET6) { 612 if (!silent) 613 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp))); 614 } 615 return hdrlen + addr_len; 616 case pimv2_group: 617 case pimv2_source: 618 if (len < addr_len + 2) 619 goto trunc; 620 ND_TCHECK2(bp[0], addr_len + 2); 621 if (af == AF_INET) { 622 if (!silent) { 623 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp + 2))); 624 if (bp[1] != 32) 625 ND_PRINT((ndo, "/%u", bp[1])); 626 } 627 } 628 else if (af == AF_INET6) { 629 if (!silent) { 630 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp + 2))); 631 if (bp[1] != 128) 632 ND_PRINT((ndo, "/%u", bp[1])); 633 } 634 } 635 if (bp[0] && !silent) { 636 if (at == pimv2_group) { 637 ND_PRINT((ndo, "(0x%02x)", bp[0])); 638 } else { 639 ND_PRINT((ndo, "(%s%s%s", 640 bp[0] & 0x04 ? "S" : "", 641 bp[0] & 0x02 ? "W" : "", 642 bp[0] & 0x01 ? "R" : "")); 643 if (bp[0] & 0xf8) { 644 ND_PRINT((ndo, "+0x%02x", bp[0] & 0xf8)); 645 } 646 ND_PRINT((ndo, ")")); 647 } 648 } 649 return hdrlen + 2 + addr_len; 650 default: 651 return -1; 652 } 653 trunc: 654 return -1; 655 } 656 657 enum checksum_status { 658 CORRECT, 659 INCORRECT, 660 UNVERIFIED 661 }; 662 663 static enum checksum_status 664 pimv2_check_checksum(netdissect_options *ndo, const u_char *bp, 665 const u_char *bp2, u_int len) 666 { 667 const struct ip *ip; 668 u_int cksum; 669 670 if (!ND_TTEST2(bp[0], len)) { 671 /* We don't have all the data. */ 672 return (UNVERIFIED); 673 } 674 ip = (const struct ip *)bp2; 675 if (IP_V(ip) == 4) { 676 struct cksum_vec vec[1]; 677 678 vec[0].ptr = bp; 679 vec[0].len = len; 680 cksum = in_cksum(vec, 1); 681 return (cksum ? INCORRECT : CORRECT); 682 } else if (IP_V(ip) == 6) { 683 const struct ip6_hdr *ip6; 684 685 ip6 = (const struct ip6_hdr *)bp2; 686 cksum = nextproto6_cksum(ndo, ip6, bp, len, len, IPPROTO_PIM); 687 return (cksum ? INCORRECT : CORRECT); 688 } else { 689 return (UNVERIFIED); 690 } 691 } 692 693 static void 694 pimv2_print(netdissect_options *ndo, 695 register const u_char *bp, register u_int len, const u_char *bp2) 696 { 697 register const struct pim *pim = (const struct pim *)bp; 698 int advance; 699 enum checksum_status cksum_status; 700 int pimv2_addr_len; 701 702 if (len < 2) 703 goto trunc; 704 ND_TCHECK(pim->pim_rsv); 705 pimv2_addr_len = pim->pim_rsv; 706 if (pimv2_addr_len != 0) 707 ND_PRINT((ndo, ", RFC2117-encoding")); 708 709 if (len < 4) 710 goto trunc; 711 ND_TCHECK(pim->pim_cksum); 712 ND_PRINT((ndo, ", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum))); 713 if (EXTRACT_16BITS(&pim->pim_cksum) == 0) { 714 ND_PRINT((ndo, "(unverified)")); 715 } else { 716 if (PIM_TYPE(pim->pim_typever) == PIMV2_TYPE_REGISTER) { 717 /* 718 * The checksum only covers the packet header, 719 * not the encapsulated packet. 720 */ 721 cksum_status = pimv2_check_checksum(ndo, bp, bp2, 8); 722 if (cksum_status == INCORRECT) { 723 /* 724 * To quote RFC 4601, "For interoperability 725 * reasons, a message carrying a checksum 726 * calculated over the entire PIM Register 727 * message should also be accepted." 728 */ 729 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len); 730 } 731 } else { 732 /* 733 * The checksum covers the entire packet. 734 */ 735 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len); 736 } 737 switch (cksum_status) { 738 739 case CORRECT: 740 ND_PRINT((ndo, "(correct)")); 741 break; 742 743 case INCORRECT: 744 ND_PRINT((ndo, "(incorrect)")); 745 break; 746 747 case UNVERIFIED: 748 ND_PRINT((ndo, "(unverified)")); 749 break; 750 } 751 } 752 bp += 4; 753 len -= 4; 754 755 switch (PIM_TYPE(pim->pim_typever)) { 756 case PIMV2_TYPE_HELLO: 757 { 758 uint16_t otype, olen; 759 while (len > 0) { 760 if (len < 4) 761 goto trunc; 762 ND_TCHECK2(bp[0], 4); 763 otype = EXTRACT_16BITS(&bp[0]); 764 olen = EXTRACT_16BITS(&bp[2]); 765 ND_PRINT((ndo, "\n\t %s Option (%u), length %u, Value: ", 766 tok2str(pimv2_hello_option_values, "Unknown", otype), 767 otype, 768 olen)); 769 bp += 4; 770 len -= 4; 771 772 if (len < olen) 773 goto trunc; 774 ND_TCHECK2(bp[0], olen); 775 switch (otype) { 776 case PIMV2_HELLO_OPTION_HOLDTIME: 777 if (olen != 2) { 778 ND_PRINT((ndo, "ERROR: Option Length != 2 Bytes (%u)", olen)); 779 } else { 780 unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); 781 } 782 break; 783 784 case PIMV2_HELLO_OPTION_LANPRUNEDELAY: 785 if (olen != 4) { 786 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 787 } else { 788 char t_bit; 789 uint16_t lan_delay, override_interval; 790 lan_delay = EXTRACT_16BITS(bp); 791 override_interval = EXTRACT_16BITS(bp+2); 792 t_bit = (lan_delay & 0x8000)? 1 : 0; 793 lan_delay &= ~0x8000; 794 ND_PRINT((ndo, "\n\t T-bit=%d, LAN delay %dms, Override interval %dms", 795 t_bit, lan_delay, override_interval)); 796 } 797 break; 798 799 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD: 800 case PIMV2_HELLO_OPTION_DR_PRIORITY: 801 switch (olen) { 802 case 0: 803 ND_PRINT((ndo, "Bi-Directional Capability (Old)")); 804 break; 805 case 4: 806 ND_PRINT((ndo, "%u", EXTRACT_32BITS(bp))); 807 break; 808 default: 809 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 810 break; 811 } 812 break; 813 814 case PIMV2_HELLO_OPTION_GENID: 815 if (olen != 4) { 816 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 817 } else { 818 ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(bp))); 819 } 820 break; 821 822 case PIMV2_HELLO_OPTION_REFRESH_CAP: 823 if (olen != 4) { 824 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 825 } else { 826 ND_PRINT((ndo, "v%d", *bp)); 827 if (*(bp+1) != 0) { 828 ND_PRINT((ndo, ", interval ")); 829 unsigned_relts_print(ndo, *(bp+1)); 830 } 831 if (EXTRACT_16BITS(bp+2) != 0) { 832 ND_PRINT((ndo, " ?0x%04x?", EXTRACT_16BITS(bp+2))); 833 } 834 } 835 break; 836 837 case PIMV2_HELLO_OPTION_BIDIR_CAP: 838 break; 839 840 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD: 841 case PIMV2_HELLO_OPTION_ADDRESS_LIST: 842 if (ndo->ndo_vflag > 1) { 843 const u_char *ptr = bp; 844 u_int plen = len; 845 while (ptr < (bp+olen)) { 846 ND_PRINT((ndo, "\n\t ")); 847 advance = pimv2_addr_print(ndo, ptr, plen, pimv2_unicast, pimv2_addr_len, 0); 848 if (advance < 0) 849 goto trunc; 850 ptr += advance; 851 plen -= advance; 852 } 853 } 854 break; 855 default: 856 if (ndo->ndo_vflag <= 1) 857 print_unknown_data(ndo, bp, "\n\t ", olen); 858 break; 859 } 860 /* do we want to see an additionally hexdump ? */ 861 if (ndo->ndo_vflag> 1) 862 print_unknown_data(ndo, bp, "\n\t ", olen); 863 bp += olen; 864 len -= olen; 865 } 866 break; 867 } 868 869 case PIMV2_TYPE_REGISTER: 870 { 871 const struct ip *ip; 872 873 if (len < 4) 874 goto trunc; 875 ND_TCHECK2(*bp, PIMV2_REGISTER_FLAG_LEN); 876 877 ND_PRINT((ndo, ", Flags [ %s ]\n\t", 878 tok2str(pimv2_register_flag_values, 879 "none", 880 EXTRACT_32BITS(bp)))); 881 882 bp += 4; len -= 4; 883 /* encapsulated multicast packet */ 884 if (len == 0) 885 goto trunc; 886 ip = (const struct ip *)bp; 887 ND_TCHECK(ip->ip_vhl); 888 switch (IP_V(ip)) { 889 case 0: /* Null header */ 890 ND_TCHECK(ip->ip_dst); 891 ND_PRINT((ndo, "IP-Null-header %s > %s", 892 ipaddr_string(ndo, &ip->ip_src), 893 ipaddr_string(ndo, &ip->ip_dst))); 894 break; 895 896 case 4: /* IPv4 */ 897 ip_print(ndo, bp, len); 898 break; 899 900 case 6: /* IPv6 */ 901 ip6_print(ndo, bp, len); 902 break; 903 904 default: 905 ND_PRINT((ndo, "IP ver %d", IP_V(ip))); 906 break; 907 } 908 break; 909 } 910 911 case PIMV2_TYPE_REGISTER_STOP: 912 ND_PRINT((ndo, " group=")); 913 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 914 goto trunc; 915 bp += advance; len -= advance; 916 ND_PRINT((ndo, " source=")); 917 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 918 goto trunc; 919 bp += advance; len -= advance; 920 break; 921 922 case PIMV2_TYPE_JOIN_PRUNE: 923 case PIMV2_TYPE_GRAFT: 924 case PIMV2_TYPE_GRAFT_ACK: 925 926 927 /* 928 * 0 1 2 3 929 * 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 1 930 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 931 * |PIM Ver| Type | Addr length | Checksum | 932 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 933 * | Unicast-Upstream Neighbor Address | 934 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 935 * | Reserved | Num groups | Holdtime | 936 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 937 * | Encoded-Multicast Group Address-1 | 938 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 939 * | Number of Joined Sources | Number of Pruned Sources | 940 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 941 * | Encoded-Joined Source Address-1 | 942 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 943 * | . | 944 * | . | 945 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 946 * | Encoded-Joined Source Address-n | 947 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 948 * | Encoded-Pruned Source Address-1 | 949 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 950 * | . | 951 * | . | 952 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 953 * | Encoded-Pruned Source Address-n | 954 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 955 * | . | 956 * | . | 957 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 958 * | Encoded-Multicast Group Address-n | 959 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 960 */ 961 962 { 963 uint8_t ngroup; 964 uint16_t holdtime; 965 uint16_t njoin; 966 uint16_t nprune; 967 int i, j; 968 969 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/ 970 ND_PRINT((ndo, ", upstream-neighbor: ")); 971 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 972 goto trunc; 973 bp += advance; len -= advance; 974 } 975 if (len < 4) 976 goto trunc; 977 ND_TCHECK2(*bp, 4); 978 ngroup = bp[1]; 979 holdtime = EXTRACT_16BITS(&bp[2]); 980 ND_PRINT((ndo, "\n\t %u group(s)", ngroup)); 981 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/ 982 ND_PRINT((ndo, ", holdtime: ")); 983 if (holdtime == 0xffff) 984 ND_PRINT((ndo, "infinite")); 985 else 986 unsigned_relts_print(ndo, holdtime); 987 } 988 bp += 4; len -= 4; 989 for (i = 0; i < ngroup; i++) { 990 ND_PRINT((ndo, "\n\t group #%u: ", i+1)); 991 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 992 goto trunc; 993 bp += advance; len -= advance; 994 if (len < 4) 995 goto trunc; 996 ND_TCHECK2(*bp, 4); 997 njoin = EXTRACT_16BITS(&bp[0]); 998 nprune = EXTRACT_16BITS(&bp[2]); 999 ND_PRINT((ndo, ", joined sources: %u, pruned sources: %u", njoin, nprune)); 1000 bp += 4; len -= 4; 1001 for (j = 0; j < njoin; j++) { 1002 ND_PRINT((ndo, "\n\t joined source #%u: ", j+1)); 1003 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) 1004 goto trunc; 1005 bp += advance; len -= advance; 1006 } 1007 for (j = 0; j < nprune; j++) { 1008 ND_PRINT((ndo, "\n\t pruned source #%u: ", j+1)); 1009 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) 1010 goto trunc; 1011 bp += advance; len -= advance; 1012 } 1013 } 1014 break; 1015 } 1016 1017 case PIMV2_TYPE_BOOTSTRAP: 1018 { 1019 int i, j, frpcnt; 1020 1021 /* Fragment Tag, Hash Mask len, and BSR-priority */ 1022 if (len < 2) 1023 goto trunc; 1024 ND_TCHECK_16BITS(bp); 1025 ND_PRINT((ndo, " tag=%x", EXTRACT_16BITS(bp))); 1026 bp += 2; 1027 len -= 2; 1028 if (len < 1) 1029 goto trunc; 1030 ND_TCHECK(bp[0]); 1031 ND_PRINT((ndo, " hashmlen=%d", bp[0])); 1032 if (len < 2) 1033 goto trunc; 1034 ND_TCHECK(bp[2]); 1035 ND_PRINT((ndo, " BSRprio=%d", bp[1])); 1036 bp += 2; 1037 len -= 2; 1038 1039 /* Encoded-Unicast-BSR-Address */ 1040 ND_PRINT((ndo, " BSR=")); 1041 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1042 goto trunc; 1043 bp += advance; 1044 len -= advance; 1045 1046 for (i = 0; len > 0; i++) { 1047 /* Encoded-Group Address */ 1048 ND_PRINT((ndo, " (group%d: ", i)); 1049 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1050 goto trunc; 1051 bp += advance; 1052 len -= advance; 1053 1054 /* RP-Count, Frag RP-Cnt, and rsvd */ 1055 if (len < 1) 1056 goto trunc; 1057 ND_TCHECK(bp[0]); 1058 ND_PRINT((ndo, " RPcnt=%d", bp[0])); 1059 if (len < 2) 1060 goto trunc; 1061 ND_TCHECK(bp[1]); 1062 ND_PRINT((ndo, " FRPcnt=%d", frpcnt = bp[1])); 1063 if (len < 4) 1064 goto trunc; 1065 bp += 4; 1066 len -= 4; 1067 1068 for (j = 0; j < frpcnt && len > 0; j++) { 1069 /* each RP info */ 1070 ND_PRINT((ndo, " RP%d=", j)); 1071 if ((advance = pimv2_addr_print(ndo, bp, len, 1072 pimv2_unicast, 1073 pimv2_addr_len, 1074 0)) < 0) 1075 goto trunc; 1076 bp += advance; 1077 len -= advance; 1078 1079 if (len < 2) 1080 goto trunc; 1081 ND_TCHECK_16BITS(bp); 1082 ND_PRINT((ndo, ",holdtime=")); 1083 unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); 1084 if (len < 3) 1085 goto trunc; 1086 ND_TCHECK(bp[2]); 1087 ND_PRINT((ndo, ",prio=%d", bp[2])); 1088 if (len < 4) 1089 goto trunc; 1090 bp += 4; 1091 len -= 4; 1092 } 1093 ND_PRINT((ndo, ")")); 1094 } 1095 break; 1096 } 1097 case PIMV2_TYPE_ASSERT: 1098 ND_PRINT((ndo, " group=")); 1099 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1100 goto trunc; 1101 bp += advance; len -= advance; 1102 ND_PRINT((ndo, " src=")); 1103 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1104 goto trunc; 1105 bp += advance; len -= advance; 1106 if (len < 8) 1107 goto trunc; 1108 ND_TCHECK2(*bp, 8); 1109 if (bp[0] & 0x80) 1110 ND_PRINT((ndo, " RPT")); 1111 ND_PRINT((ndo, " pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff)); 1112 ND_PRINT((ndo, " metric=%u", EXTRACT_32BITS(&bp[4]))); 1113 break; 1114 1115 case PIMV2_TYPE_CANDIDATE_RP: 1116 { 1117 int i, pfxcnt; 1118 1119 /* Prefix-Cnt, Priority, and Holdtime */ 1120 if (len < 1) 1121 goto trunc; 1122 ND_TCHECK(bp[0]); 1123 ND_PRINT((ndo, " prefix-cnt=%d", bp[0])); 1124 pfxcnt = bp[0]; 1125 if (len < 2) 1126 goto trunc; 1127 ND_TCHECK(bp[1]); 1128 ND_PRINT((ndo, " prio=%d", bp[1])); 1129 if (len < 4) 1130 goto trunc; 1131 ND_TCHECK_16BITS(&bp[2]); 1132 ND_PRINT((ndo, " holdtime=")); 1133 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); 1134 bp += 4; 1135 len -= 4; 1136 1137 /* Encoded-Unicast-RP-Address */ 1138 ND_PRINT((ndo, " RP=")); 1139 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1140 goto trunc; 1141 bp += advance; 1142 len -= advance; 1143 1144 /* Encoded-Group Addresses */ 1145 for (i = 0; i < pfxcnt && len > 0; i++) { 1146 ND_PRINT((ndo, " Group%d=", i)); 1147 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1148 goto trunc; 1149 bp += advance; 1150 len -= advance; 1151 } 1152 break; 1153 } 1154 1155 case PIMV2_TYPE_PRUNE_REFRESH: 1156 ND_PRINT((ndo, " src=")); 1157 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1158 goto trunc; 1159 bp += advance; 1160 len -= advance; 1161 ND_PRINT((ndo, " grp=")); 1162 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1163 goto trunc; 1164 bp += advance; 1165 len -= advance; 1166 ND_PRINT((ndo, " forwarder=")); 1167 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1168 goto trunc; 1169 bp += advance; 1170 len -= advance; 1171 if (len < 2) 1172 goto trunc; 1173 ND_TCHECK_16BITS(bp); 1174 ND_PRINT((ndo, " TUNR ")); 1175 unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); 1176 break; 1177 1178 1179 default: 1180 ND_PRINT((ndo, " [type %d]", PIM_TYPE(pim->pim_typever))); 1181 break; 1182 } 1183 1184 return; 1185 1186 trunc: 1187 ND_PRINT((ndo, "[|pim]")); 1188 } 1189 1190 /* 1191 * Local Variables: 1192 * c-style: whitesmith 1193 * c-basic-offset: 8 1194 * End: 1195 */ 1196
