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 #include <sys/cdefs.h> 23 #ifndef lint 24 __RCSID("$NetBSD: print-pim.c,v 1.10 2017/09/08 14:01:13 christos Exp $"); 25 #endif 26 27 /* \summary: Protocol Independent Multicast (PIM) printer */ 28 29 #ifdef HAVE_CONFIG_H 30 #include "config.h" 31 #endif 32 33 #include <netdissect-stdinc.h> 34 35 #include "netdissect.h" 36 #include "addrtoname.h" 37 #include "extract.h" 38 39 #include "ip.h" 40 #include "ip6.h" 41 #include "ipproto.h" 42 43 #define PIMV1_TYPE_QUERY 0 44 #define PIMV1_TYPE_REGISTER 1 45 #define PIMV1_TYPE_REGISTER_STOP 2 46 #define PIMV1_TYPE_JOIN_PRUNE 3 47 #define PIMV1_TYPE_RP_REACHABILITY 4 48 #define PIMV1_TYPE_ASSERT 5 49 #define PIMV1_TYPE_GRAFT 6 50 #define PIMV1_TYPE_GRAFT_ACK 7 51 52 static const struct tok pimv1_type_str[] = { 53 { PIMV1_TYPE_QUERY, "Query" }, 54 { PIMV1_TYPE_REGISTER, "Register" }, 55 { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" }, 56 { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" }, 57 { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" }, 58 { PIMV1_TYPE_ASSERT, "Assert" }, 59 { PIMV1_TYPE_GRAFT, "Graft" }, 60 { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" }, 61 { 0, NULL } 62 }; 63 64 #define PIMV2_TYPE_HELLO 0 65 #define PIMV2_TYPE_REGISTER 1 66 #define PIMV2_TYPE_REGISTER_STOP 2 67 #define PIMV2_TYPE_JOIN_PRUNE 3 68 #define PIMV2_TYPE_BOOTSTRAP 4 69 #define PIMV2_TYPE_ASSERT 5 70 #define PIMV2_TYPE_GRAFT 6 71 #define PIMV2_TYPE_GRAFT_ACK 7 72 #define PIMV2_TYPE_CANDIDATE_RP 8 73 #define PIMV2_TYPE_PRUNE_REFRESH 9 74 #define PIMV2_TYPE_DF_ELECTION 10 75 #define PIMV2_TYPE_ECMP_REDIRECT 11 76 77 static const struct tok pimv2_type_values[] = { 78 { PIMV2_TYPE_HELLO, "Hello" }, 79 { PIMV2_TYPE_REGISTER, "Register" }, 80 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" }, 81 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" }, 82 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" }, 83 { PIMV2_TYPE_ASSERT, "Assert" }, 84 { PIMV2_TYPE_GRAFT, "Graft" }, 85 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" }, 86 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" }, 87 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" }, 88 { PIMV2_TYPE_DF_ELECTION, "DF Election" }, 89 { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" }, 90 { 0, NULL} 91 }; 92 93 #define PIMV2_HELLO_OPTION_HOLDTIME 1 94 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2 95 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18 96 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19 97 #define PIMV2_HELLO_OPTION_GENID 20 98 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21 99 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22 100 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24 101 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001 102 103 static const struct tok pimv2_hello_option_values[] = { 104 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" }, 105 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" }, 106 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" }, 107 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" }, 108 { PIMV2_HELLO_OPTION_GENID, "Generation ID" }, 109 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" }, 110 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" }, 111 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" }, 112 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" }, 113 { 0, NULL} 114 }; 115 116 #define PIMV2_REGISTER_FLAG_LEN 4 117 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000 118 #define PIMV2_REGISTER_FLAG_NULL 0x40000000 119 120 static const struct tok pimv2_register_flag_values[] = { 121 { PIMV2_REGISTER_FLAG_BORDER, "Border" }, 122 { PIMV2_REGISTER_FLAG_NULL, "Null" }, 123 { 0, NULL} 124 }; 125 126 /* 127 * XXX: We consider a case where IPv6 is not ready yet for portability, 128 * but PIM dependent defintions should be independent of IPv6... 129 */ 130 131 struct pim { 132 uint8_t pim_typever; 133 /* upper 4bit: PIM version number; 2 for PIMv2 */ 134 /* lower 4bit: the PIM message type, currently they are: 135 * Hello, Register, Register-Stop, Join/Prune, 136 * Bootstrap, Assert, Graft (PIM-DM only), 137 * Graft-Ack (PIM-DM only), C-RP-Adv 138 */ 139 #define PIM_VER(x) (((x) & 0xf0) >> 4) 140 #define PIM_TYPE(x) ((x) & 0x0f) 141 u_char pim_rsv; /* Reserved */ 142 u_short pim_cksum; /* IP style check sum */ 143 }; 144 145 static void pimv2_print(netdissect_options *, register const u_char *bp, register u_int len, const u_char *); 146 147 static void 148 pimv1_join_prune_print(netdissect_options *ndo, 149 register const u_char *bp, register u_int len) 150 { 151 int ngroups, njoin, nprune; 152 int njp; 153 154 /* If it's a single group and a single source, use 1-line output. */ 155 if (ND_TTEST2(bp[0], 30) && bp[11] == 1 && 156 ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) { 157 int hold; 158 159 ND_PRINT((ndo, " RPF %s ", ipaddr_string(ndo, bp))); 160 hold = EXTRACT_16BITS(&bp[6]); 161 if (hold != 180) { 162 ND_PRINT((ndo, "Hold ")); 163 unsigned_relts_print(ndo, hold); 164 } 165 ND_PRINT((ndo, "%s (%s/%d, %s", njoin ? "Join" : "Prune", 166 ipaddr_string(ndo, &bp[26]), bp[25] & 0x3f, 167 ipaddr_string(ndo, &bp[12]))); 168 if (EXTRACT_32BITS(&bp[16]) != 0xffffffff) 169 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[16]))); 170 ND_PRINT((ndo, ") %s%s %s", 171 (bp[24] & 0x01) ? "Sparse" : "Dense", 172 (bp[25] & 0x80) ? " WC" : "", 173 (bp[25] & 0x40) ? "RP" : "SPT")); 174 return; 175 } 176 177 if (len < sizeof(struct in_addr)) 178 goto trunc; 179 ND_TCHECK2(bp[0], sizeof(struct in_addr)); 180 if (ndo->ndo_vflag > 1) 181 ND_PRINT((ndo, "\n")); 182 ND_PRINT((ndo, " Upstream Nbr: %s", ipaddr_string(ndo, bp))); 183 bp += 4; 184 len -= 4; 185 if (len < 4) 186 goto trunc; 187 ND_TCHECK2(bp[2], 2); 188 if (ndo->ndo_vflag > 1) 189 ND_PRINT((ndo, "\n")); 190 ND_PRINT((ndo, " Hold time: ")); 191 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); 192 if (ndo->ndo_vflag < 2) 193 return; 194 bp += 4; 195 len -= 4; 196 197 if (len < 4) 198 goto trunc; 199 ND_TCHECK2(bp[0], 4); 200 ngroups = bp[3]; 201 bp += 4; 202 len -= 4; 203 while (ngroups--) { 204 /* 205 * XXX - does the address have length "addrlen" and the 206 * mask length "maddrlen"? 207 */ 208 if (len < 4) 209 goto trunc; 210 ND_TCHECK2(bp[0], sizeof(struct in_addr)); 211 ND_PRINT((ndo, "\n\tGroup: %s", ipaddr_string(ndo, bp))); 212 bp += 4; 213 len -= 4; 214 if (len < 4) 215 goto trunc; 216 ND_TCHECK2(bp[0], sizeof(struct in_addr)); 217 if (EXTRACT_32BITS(&bp[0]) != 0xffffffff) 218 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[0]))); 219 bp += 4; 220 len -= 4; 221 if (len < 4) 222 goto trunc; 223 ND_TCHECK2(bp[0], 4); 224 njoin = EXTRACT_16BITS(&bp[0]); 225 nprune = EXTRACT_16BITS(&bp[2]); 226 ND_PRINT((ndo, " joined: %d pruned: %d", njoin, nprune)); 227 bp += 4; 228 len -= 4; 229 for (njp = 0; njp < (njoin + nprune); njp++) { 230 const char *type; 231 232 if (njp < njoin) 233 type = "Join "; 234 else 235 type = "Prune"; 236 if (len < 6) 237 goto trunc; 238 ND_TCHECK2(bp[0], 6); 239 ND_PRINT((ndo, "\n\t%s %s%s%s%s/%d", type, 240 (bp[0] & 0x01) ? "Sparse " : "Dense ", 241 (bp[1] & 0x80) ? "WC " : "", 242 (bp[1] & 0x40) ? "RP " : "SPT ", 243 ipaddr_string(ndo, &bp[2]), 244 bp[1] & 0x3f)); 245 bp += 6; 246 len -= 6; 247 } 248 } 249 return; 250 trunc: 251 ND_PRINT((ndo, "[|pim]")); 252 return; 253 } 254 255 void 256 pimv1_print(netdissect_options *ndo, 257 register const u_char *bp, register u_int len) 258 { 259 register u_char type; 260 261 ND_TCHECK(bp[1]); 262 type = bp[1]; 263 264 ND_PRINT((ndo, " %s", tok2str(pimv1_type_str, "[type %u]", type))); 265 switch (type) { 266 case PIMV1_TYPE_QUERY: 267 if (ND_TTEST(bp[8])) { 268 switch (bp[8] >> 4) { 269 case 0: 270 ND_PRINT((ndo, " Dense-mode")); 271 break; 272 case 1: 273 ND_PRINT((ndo, " Sparse-mode")); 274 break; 275 case 2: 276 ND_PRINT((ndo, " Sparse-Dense-mode")); 277 break; 278 default: 279 ND_PRINT((ndo, " mode-%d", bp[8] >> 4)); 280 break; 281 } 282 } 283 if (ndo->ndo_vflag) { 284 ND_TCHECK2(bp[10],2); 285 ND_PRINT((ndo, " (Hold-time ")); 286 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[10])); 287 ND_PRINT((ndo, ")")); 288 } 289 break; 290 291 case PIMV1_TYPE_REGISTER: 292 ND_TCHECK2(bp[8], 20); /* ip header */ 293 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[20]), 294 ipaddr_string(ndo, &bp[24]))); 295 break; 296 case PIMV1_TYPE_REGISTER_STOP: 297 ND_TCHECK2(bp[12], sizeof(struct in_addr)); 298 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[8]), 299 ipaddr_string(ndo, &bp[12]))); 300 break; 301 case PIMV1_TYPE_RP_REACHABILITY: 302 if (ndo->ndo_vflag) { 303 ND_TCHECK2(bp[22], 2); 304 ND_PRINT((ndo, " group %s", ipaddr_string(ndo, &bp[8]))); 305 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff) 306 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12]))); 307 ND_PRINT((ndo, " RP %s hold ", ipaddr_string(ndo, &bp[16]))); 308 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[22])); 309 } 310 break; 311 case PIMV1_TYPE_ASSERT: 312 ND_TCHECK2(bp[16], sizeof(struct in_addr)); 313 ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[16]), 314 ipaddr_string(ndo, &bp[8]))); 315 if (EXTRACT_32BITS(&bp[12]) != 0xffffffff) 316 ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12]))); 317 ND_TCHECK2(bp[24], 4); 318 ND_PRINT((ndo, " %s pref %d metric %d", 319 (bp[20] & 0x80) ? "RP-tree" : "SPT", 320 EXTRACT_32BITS(&bp[20]) & 0x7fffffff, 321 EXTRACT_32BITS(&bp[24]))); 322 break; 323 case PIMV1_TYPE_JOIN_PRUNE: 324 case PIMV1_TYPE_GRAFT: 325 case PIMV1_TYPE_GRAFT_ACK: 326 if (ndo->ndo_vflag) { 327 if (len < 8) 328 goto trunc; 329 pimv1_join_prune_print(ndo, &bp[8], len - 8); 330 } 331 break; 332 } 333 ND_TCHECK(bp[4]); 334 if ((bp[4] >> 4) != 1) 335 ND_PRINT((ndo, " [v%d]", bp[4] >> 4)); 336 return; 337 338 trunc: 339 ND_PRINT((ndo, "[|pim]")); 340 return; 341 } 342 343 /* 344 * auto-RP is a cisco protocol, documented at 345 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt 346 * 347 * This implements version 1+, dated Sept 9, 1998. 348 */ 349 void 350 cisco_autorp_print(netdissect_options *ndo, 351 register const u_char *bp, register u_int len) 352 { 353 int type; 354 int numrps; 355 int hold; 356 357 if (len < 8) 358 goto trunc; 359 ND_TCHECK(bp[0]); 360 ND_PRINT((ndo, " auto-rp ")); 361 type = bp[0]; 362 switch (type) { 363 case 0x11: 364 ND_PRINT((ndo, "candidate-advert")); 365 break; 366 case 0x12: 367 ND_PRINT((ndo, "mapping")); 368 break; 369 default: 370 ND_PRINT((ndo, "type-0x%02x", type)); 371 break; 372 } 373 374 ND_TCHECK(bp[1]); 375 numrps = bp[1]; 376 377 ND_TCHECK2(bp[2], 2); 378 ND_PRINT((ndo, " Hold ")); 379 hold = EXTRACT_16BITS(&bp[2]); 380 if (hold) 381 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); 382 else 383 ND_PRINT((ndo, "FOREVER")); 384 385 /* Next 4 bytes are reserved. */ 386 387 bp += 8; len -= 8; 388 389 /*XXX skip unless -v? */ 390 391 /* 392 * Rest of packet: 393 * numrps entries of the form: 394 * 32 bits: RP 395 * 6 bits: reserved 396 * 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2". 397 * 8 bits: # of entries for this RP 398 * each entry: 7 bits: reserved, 1 bit: negative, 399 * 8 bits: mask 32 bits: source 400 * lather, rinse, repeat. 401 */ 402 while (numrps--) { 403 int nentries; 404 char s; 405 406 if (len < 4) 407 goto trunc; 408 ND_TCHECK2(bp[0], 4); 409 ND_PRINT((ndo, " RP %s", ipaddr_string(ndo, bp))); 410 bp += 4; 411 len -= 4; 412 if (len < 1) 413 goto trunc; 414 ND_TCHECK(bp[0]); 415 switch (bp[0] & 0x3) { 416 case 0: ND_PRINT((ndo, " PIMv?")); 417 break; 418 case 1: ND_PRINT((ndo, " PIMv1")); 419 break; 420 case 2: ND_PRINT((ndo, " PIMv2")); 421 break; 422 case 3: ND_PRINT((ndo, " PIMv1+2")); 423 break; 424 } 425 if (bp[0] & 0xfc) 426 ND_PRINT((ndo, " [rsvd=0x%02x]", bp[0] & 0xfc)); 427 bp += 1; 428 len -= 1; 429 if (len < 1) 430 goto trunc; 431 ND_TCHECK(bp[0]); 432 nentries = bp[0]; 433 bp += 1; 434 len -= 1; 435 s = ' '; 436 for (; nentries; nentries--) { 437 if (len < 6) 438 goto trunc; 439 ND_TCHECK2(bp[0], 6); 440 ND_PRINT((ndo, "%c%s%s/%d", s, bp[0] & 1 ? "!" : "", 441 ipaddr_string(ndo, &bp[2]), bp[1])); 442 if (bp[0] & 0x02) { 443 ND_PRINT((ndo, " bidir")); 444 } 445 if (bp[0] & 0xfc) { 446 ND_PRINT((ndo, "[rsvd=0x%02x]", bp[0] & 0xfc)); 447 } 448 s = ','; 449 bp += 6; len -= 6; 450 } 451 } 452 return; 453 454 trunc: 455 ND_PRINT((ndo, "[|autorp]")); 456 return; 457 } 458 459 void 460 pim_print(netdissect_options *ndo, 461 register const u_char *bp, register u_int len, const u_char *bp2) 462 { 463 register const struct pim *pim = (const struct pim *)bp; 464 465 #ifdef notyet /* currently we see only version and type */ 466 ND_TCHECK(pim->pim_rsv); 467 #endif 468 469 ND_TCHECK(pim->pim_typever); 470 switch (PIM_VER(pim->pim_typever)) { 471 case 2: 472 if (!ndo->ndo_vflag) { 473 ND_PRINT((ndo, "PIMv%u, %s, length %u", 474 PIM_VER(pim->pim_typever), 475 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)), 476 len)); 477 return; 478 } else { 479 ND_PRINT((ndo, "PIMv%u, length %u\n\t%s", 480 PIM_VER(pim->pim_typever), 481 len, 482 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)))); 483 pimv2_print(ndo, bp, len, bp2); 484 } 485 break; 486 default: 487 ND_PRINT((ndo, "PIMv%u, length %u", 488 PIM_VER(pim->pim_typever), 489 len)); 490 break; 491 } 492 return; 493 494 trunc: 495 ND_PRINT((ndo, "[|pim]")); 496 return; 497 } 498 499 /* 500 * PIMv2 uses encoded address representations. 501 * 502 * The last PIM-SM I-D before RFC2117 was published specified the 503 * following representation for unicast addresses. However, RFC2117 504 * specified no encoding for unicast addresses with the unicast 505 * address length specified in the header. Therefore, we have to 506 * guess which encoding is being used (Cisco's PIMv2 implementation 507 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved" 508 * field into a 'unicast-address-length-in-bytes' field. We guess 509 * that it's the draft encoding if this reserved field is zero. 510 * 511 * RFC2362 goes back to the encoded format, and calls the addr length 512 * field "reserved" again. 513 * 514 * The first byte is the address family, from: 515 * 516 * 0 Reserved 517 * 1 IP (IP version 4) 518 * 2 IP6 (IP version 6) 519 * 3 NSAP 520 * 4 HDLC (8-bit multidrop) 521 * 5 BBN 1822 522 * 6 802 (includes all 802 media plus Ethernet "canonical format") 523 * 7 E.163 524 * 8 E.164 (SMDS, Frame Relay, ATM) 525 * 9 F.69 (Telex) 526 * 10 X.121 (X.25, Frame Relay) 527 * 11 IPX 528 * 12 Appletalk 529 * 13 Decnet IV 530 * 14 Banyan Vines 531 * 15 E.164 with NSAP format subaddress 532 * 533 * In addition, the second byte is an "Encoding". 0 is the default 534 * encoding for the address family, and no other encodings are currently 535 * specified. 536 * 537 */ 538 539 enum pimv2_addrtype { 540 pimv2_unicast, pimv2_group, pimv2_source 541 }; 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 | Unicast Address | 547 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++ 548 * 0 1 2 3 549 * 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 1 550 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 551 * | Addr Family | Encoding Type | Reserved | Mask Len | 552 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 553 * | Group multicast Address | 554 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 555 * 0 1 2 3 556 * 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 1 557 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 558 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len | 559 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 560 * | Source Address | 561 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 562 */ 563 static int 564 pimv2_addr_print(netdissect_options *ndo, 565 const u_char *bp, u_int len, enum pimv2_addrtype at, 566 u_int addr_len, int silent) 567 { 568 int af; 569 int hdrlen; 570 571 if (addr_len == 0) { 572 if (len < 2) 573 goto trunc; 574 ND_TCHECK(bp[1]); 575 switch (bp[0]) { 576 case 1: 577 af = AF_INET; 578 addr_len = (u_int)sizeof(struct in_addr); 579 break; 580 case 2: 581 af = AF_INET6; 582 addr_len = (u_int)sizeof(struct in6_addr); 583 break; 584 default: 585 return -1; 586 } 587 if (bp[1] != 0) 588 return -1; 589 hdrlen = 2; 590 } else { 591 switch (addr_len) { 592 case sizeof(struct in_addr): 593 af = AF_INET; 594 break; 595 case sizeof(struct in6_addr): 596 af = AF_INET6; 597 break; 598 default: 599 return -1; 600 break; 601 } 602 hdrlen = 0; 603 } 604 605 bp += hdrlen; 606 len -= hdrlen; 607 switch (at) { 608 case pimv2_unicast: 609 if (len < addr_len) 610 goto trunc; 611 ND_TCHECK2(bp[0], addr_len); 612 if (af == AF_INET) { 613 if (!silent) 614 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp))); 615 } 616 else if (af == AF_INET6) { 617 if (!silent) 618 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp))); 619 } 620 return hdrlen + addr_len; 621 case pimv2_group: 622 case pimv2_source: 623 if (len < addr_len + 2) 624 goto trunc; 625 ND_TCHECK2(bp[0], addr_len + 2); 626 if (af == AF_INET) { 627 if (!silent) { 628 ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp + 2))); 629 if (bp[1] != 32) 630 ND_PRINT((ndo, "/%u", bp[1])); 631 } 632 } 633 else if (af == AF_INET6) { 634 if (!silent) { 635 ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp + 2))); 636 if (bp[1] != 128) 637 ND_PRINT((ndo, "/%u", bp[1])); 638 } 639 } 640 if (bp[0] && !silent) { 641 if (at == pimv2_group) { 642 ND_PRINT((ndo, "(0x%02x)", bp[0])); 643 } else { 644 ND_PRINT((ndo, "(%s%s%s", 645 bp[0] & 0x04 ? "S" : "", 646 bp[0] & 0x02 ? "W" : "", 647 bp[0] & 0x01 ? "R" : "")); 648 if (bp[0] & 0xf8) { 649 ND_PRINT((ndo, "+0x%02x", bp[0] & 0xf8)); 650 } 651 ND_PRINT((ndo, ")")); 652 } 653 } 654 return hdrlen + 2 + addr_len; 655 default: 656 return -1; 657 } 658 trunc: 659 return -1; 660 } 661 662 enum checksum_status { 663 CORRECT, 664 INCORRECT, 665 UNVERIFIED 666 }; 667 668 static enum checksum_status 669 pimv2_check_checksum(netdissect_options *ndo, const u_char *bp, 670 const u_char *bp2, u_int len) 671 { 672 const struct ip *ip; 673 u_int cksum; 674 675 if (!ND_TTEST2(bp[0], len)) { 676 /* We don't have all the data. */ 677 return (UNVERIFIED); 678 } 679 ip = (const struct ip *)bp2; 680 if (IP_V(ip) == 4) { 681 struct cksum_vec vec[1]; 682 683 vec[0].ptr = bp; 684 vec[0].len = len; 685 cksum = in_cksum(vec, 1); 686 return (cksum ? INCORRECT : CORRECT); 687 } else if (IP_V(ip) == 6) { 688 const struct ip6_hdr *ip6; 689 690 ip6 = (const struct ip6_hdr *)bp2; 691 cksum = nextproto6_cksum(ndo, ip6, bp, len, len, IPPROTO_PIM); 692 return (cksum ? INCORRECT : CORRECT); 693 } else { 694 return (UNVERIFIED); 695 } 696 } 697 698 static void 699 pimv2_print(netdissect_options *ndo, 700 register const u_char *bp, register u_int len, const u_char *bp2) 701 { 702 register const struct pim *pim = (const struct pim *)bp; 703 int advance; 704 enum checksum_status cksum_status; 705 int pimv2_addr_len; 706 707 if (len < 2) 708 goto trunc; 709 ND_TCHECK(pim->pim_rsv); 710 pimv2_addr_len = pim->pim_rsv; 711 if (pimv2_addr_len != 0) 712 ND_PRINT((ndo, ", RFC2117-encoding")); 713 714 if (len < 4) 715 goto trunc; 716 ND_TCHECK(pim->pim_cksum); 717 ND_PRINT((ndo, ", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum))); 718 if (EXTRACT_16BITS(&pim->pim_cksum) == 0) { 719 ND_PRINT((ndo, "(unverified)")); 720 } else { 721 if (PIM_TYPE(pim->pim_typever) == PIMV2_TYPE_REGISTER) { 722 /* 723 * The checksum only covers the packet header, 724 * not the encapsulated packet. 725 */ 726 cksum_status = pimv2_check_checksum(ndo, bp, bp2, 8); 727 if (cksum_status == INCORRECT) { 728 /* 729 * To quote RFC 4601, "For interoperability 730 * reasons, a message carrying a checksum 731 * calculated over the entire PIM Register 732 * message should also be accepted." 733 */ 734 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len); 735 } 736 } else { 737 /* 738 * The checksum covers the entire packet. 739 */ 740 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len); 741 } 742 switch (cksum_status) { 743 744 case CORRECT: 745 ND_PRINT((ndo, "(correct)")); 746 break; 747 748 case INCORRECT: 749 ND_PRINT((ndo, "(incorrect)")); 750 break; 751 752 case UNVERIFIED: 753 ND_PRINT((ndo, "(unverified)")); 754 break; 755 } 756 } 757 bp += 4; 758 len -= 4; 759 760 switch (PIM_TYPE(pim->pim_typever)) { 761 case PIMV2_TYPE_HELLO: 762 { 763 uint16_t otype, olen; 764 while (len > 0) { 765 if (len < 4) 766 goto trunc; 767 ND_TCHECK2(bp[0], 4); 768 otype = EXTRACT_16BITS(&bp[0]); 769 olen = EXTRACT_16BITS(&bp[2]); 770 ND_PRINT((ndo, "\n\t %s Option (%u), length %u, Value: ", 771 tok2str(pimv2_hello_option_values, "Unknown", otype), 772 otype, 773 olen)); 774 bp += 4; 775 len -= 4; 776 777 if (len < olen) 778 goto trunc; 779 ND_TCHECK2(bp[0], olen); 780 switch (otype) { 781 case PIMV2_HELLO_OPTION_HOLDTIME: 782 if (olen != 2) { 783 ND_PRINT((ndo, "ERROR: Option Length != 2 Bytes (%u)", olen)); 784 } else { 785 unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); 786 } 787 break; 788 789 case PIMV2_HELLO_OPTION_LANPRUNEDELAY: 790 if (olen != 4) { 791 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 792 } else { 793 char t_bit; 794 uint16_t lan_delay, override_interval; 795 lan_delay = EXTRACT_16BITS(bp); 796 override_interval = EXTRACT_16BITS(bp+2); 797 t_bit = (lan_delay & 0x8000)? 1 : 0; 798 lan_delay &= ~0x8000; 799 ND_PRINT((ndo, "\n\t T-bit=%d, LAN delay %dms, Override interval %dms", 800 t_bit, lan_delay, override_interval)); 801 } 802 break; 803 804 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD: 805 case PIMV2_HELLO_OPTION_DR_PRIORITY: 806 switch (olen) { 807 case 0: 808 ND_PRINT((ndo, "Bi-Directional Capability (Old)")); 809 break; 810 case 4: 811 ND_PRINT((ndo, "%u", EXTRACT_32BITS(bp))); 812 break; 813 default: 814 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 815 break; 816 } 817 break; 818 819 case PIMV2_HELLO_OPTION_GENID: 820 if (olen != 4) { 821 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 822 } else { 823 ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(bp))); 824 } 825 break; 826 827 case PIMV2_HELLO_OPTION_REFRESH_CAP: 828 if (olen != 4) { 829 ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); 830 } else { 831 ND_PRINT((ndo, "v%d", *bp)); 832 if (*(bp+1) != 0) { 833 ND_PRINT((ndo, ", interval ")); 834 unsigned_relts_print(ndo, *(bp+1)); 835 } 836 if (EXTRACT_16BITS(bp+2) != 0) { 837 ND_PRINT((ndo, " ?0x%04x?", EXTRACT_16BITS(bp+2))); 838 } 839 } 840 break; 841 842 case PIMV2_HELLO_OPTION_BIDIR_CAP: 843 break; 844 845 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD: 846 case PIMV2_HELLO_OPTION_ADDRESS_LIST: 847 if (ndo->ndo_vflag > 1) { 848 const u_char *ptr = bp; 849 u_int plen = len; 850 while (ptr < (bp+olen)) { 851 ND_PRINT((ndo, "\n\t ")); 852 advance = pimv2_addr_print(ndo, ptr, plen, pimv2_unicast, pimv2_addr_len, 0); 853 if (advance < 0) 854 goto trunc; 855 ptr += advance; 856 plen -= advance; 857 } 858 } 859 break; 860 default: 861 if (ndo->ndo_vflag <= 1) 862 print_unknown_data(ndo, bp, "\n\t ", olen); 863 break; 864 } 865 /* do we want to see an additionally hexdump ? */ 866 if (ndo->ndo_vflag> 1) 867 print_unknown_data(ndo, bp, "\n\t ", olen); 868 bp += olen; 869 len -= olen; 870 } 871 break; 872 } 873 874 case PIMV2_TYPE_REGISTER: 875 { 876 const struct ip *ip; 877 878 if (len < 4) 879 goto trunc; 880 ND_TCHECK2(*bp, PIMV2_REGISTER_FLAG_LEN); 881 882 ND_PRINT((ndo, ", Flags [ %s ]\n\t", 883 tok2str(pimv2_register_flag_values, 884 "none", 885 EXTRACT_32BITS(bp)))); 886 887 bp += 4; len -= 4; 888 /* encapsulated multicast packet */ 889 if (len == 0) 890 goto trunc; 891 ip = (const struct ip *)bp; 892 ND_TCHECK(ip->ip_vhl); 893 switch (IP_V(ip)) { 894 case 0: /* Null header */ 895 ND_TCHECK(ip->ip_dst); 896 ND_PRINT((ndo, "IP-Null-header %s > %s", 897 ipaddr_string(ndo, &ip->ip_src), 898 ipaddr_string(ndo, &ip->ip_dst))); 899 break; 900 901 case 4: /* IPv4 */ 902 ip_print(ndo, bp, len); 903 break; 904 905 case 6: /* IPv6 */ 906 ip6_print(ndo, bp, len); 907 break; 908 909 default: 910 ND_PRINT((ndo, "IP ver %d", IP_V(ip))); 911 break; 912 } 913 break; 914 } 915 916 case PIMV2_TYPE_REGISTER_STOP: 917 ND_PRINT((ndo, " group=")); 918 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 919 goto trunc; 920 bp += advance; len -= advance; 921 ND_PRINT((ndo, " source=")); 922 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 923 goto trunc; 924 bp += advance; len -= advance; 925 break; 926 927 case PIMV2_TYPE_JOIN_PRUNE: 928 case PIMV2_TYPE_GRAFT: 929 case PIMV2_TYPE_GRAFT_ACK: 930 931 932 /* 933 * 0 1 2 3 934 * 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 1 935 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 936 * |PIM Ver| Type | Addr length | Checksum | 937 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 938 * | Unicast-Upstream Neighbor Address | 939 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 940 * | Reserved | Num groups | Holdtime | 941 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 942 * | Encoded-Multicast Group Address-1 | 943 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 944 * | Number of Joined Sources | Number of Pruned Sources | 945 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 946 * | Encoded-Joined Source Address-1 | 947 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 948 * | . | 949 * | . | 950 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 951 * | Encoded-Joined Source Address-n | 952 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 953 * | Encoded-Pruned Source Address-1 | 954 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 955 * | . | 956 * | . | 957 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 958 * | Encoded-Pruned Source Address-n | 959 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 960 * | . | 961 * | . | 962 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 963 * | Encoded-Multicast Group Address-n | 964 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 965 */ 966 967 { 968 uint8_t ngroup; 969 uint16_t holdtime; 970 uint16_t njoin; 971 uint16_t nprune; 972 int i, j; 973 974 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/ 975 ND_PRINT((ndo, ", upstream-neighbor: ")); 976 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 977 goto trunc; 978 bp += advance; len -= advance; 979 } 980 if (len < 4) 981 goto trunc; 982 ND_TCHECK2(*bp, 4); 983 ngroup = bp[1]; 984 holdtime = EXTRACT_16BITS(&bp[2]); 985 ND_PRINT((ndo, "\n\t %u group(s)", ngroup)); 986 if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/ 987 ND_PRINT((ndo, ", holdtime: ")); 988 if (holdtime == 0xffff) 989 ND_PRINT((ndo, "infinite")); 990 else 991 unsigned_relts_print(ndo, holdtime); 992 } 993 bp += 4; len -= 4; 994 for (i = 0; i < ngroup; i++) { 995 ND_PRINT((ndo, "\n\t group #%u: ", i+1)); 996 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 997 goto trunc; 998 bp += advance; len -= advance; 999 if (len < 4) 1000 goto trunc; 1001 ND_TCHECK2(*bp, 4); 1002 njoin = EXTRACT_16BITS(&bp[0]); 1003 nprune = EXTRACT_16BITS(&bp[2]); 1004 ND_PRINT((ndo, ", joined sources: %u, pruned sources: %u", njoin, nprune)); 1005 bp += 4; len -= 4; 1006 for (j = 0; j < njoin; j++) { 1007 ND_PRINT((ndo, "\n\t joined source #%u: ", j+1)); 1008 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) 1009 goto trunc; 1010 bp += advance; len -= advance; 1011 } 1012 for (j = 0; j < nprune; j++) { 1013 ND_PRINT((ndo, "\n\t pruned source #%u: ", j+1)); 1014 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) 1015 goto trunc; 1016 bp += advance; len -= advance; 1017 } 1018 } 1019 break; 1020 } 1021 1022 case PIMV2_TYPE_BOOTSTRAP: 1023 { 1024 int i, j, frpcnt; 1025 1026 /* Fragment Tag, Hash Mask len, and BSR-priority */ 1027 if (len < 2) 1028 goto trunc; 1029 ND_TCHECK_16BITS(bp); 1030 ND_PRINT((ndo, " tag=%x", EXTRACT_16BITS(bp))); 1031 bp += 2; 1032 len -= 2; 1033 if (len < 1) 1034 goto trunc; 1035 ND_TCHECK(bp[0]); 1036 ND_PRINT((ndo, " hashmlen=%d", bp[0])); 1037 if (len < 2) 1038 goto trunc; 1039 ND_TCHECK(bp[2]); 1040 ND_PRINT((ndo, " BSRprio=%d", bp[1])); 1041 bp += 2; 1042 len -= 2; 1043 1044 /* Encoded-Unicast-BSR-Address */ 1045 ND_PRINT((ndo, " BSR=")); 1046 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1047 goto trunc; 1048 bp += advance; 1049 len -= advance; 1050 1051 for (i = 0; len > 0; i++) { 1052 /* Encoded-Group Address */ 1053 ND_PRINT((ndo, " (group%d: ", i)); 1054 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1055 goto trunc; 1056 bp += advance; 1057 len -= advance; 1058 1059 /* RP-Count, Frag RP-Cnt, and rsvd */ 1060 if (len < 1) 1061 goto trunc; 1062 ND_TCHECK(bp[0]); 1063 ND_PRINT((ndo, " RPcnt=%d", bp[0])); 1064 if (len < 2) 1065 goto trunc; 1066 ND_TCHECK(bp[1]); 1067 ND_PRINT((ndo, " FRPcnt=%d", frpcnt = bp[1])); 1068 if (len < 4) 1069 goto trunc; 1070 bp += 4; 1071 len -= 4; 1072 1073 for (j = 0; j < frpcnt && len > 0; j++) { 1074 /* each RP info */ 1075 ND_PRINT((ndo, " RP%d=", j)); 1076 if ((advance = pimv2_addr_print(ndo, bp, len, 1077 pimv2_unicast, 1078 pimv2_addr_len, 1079 0)) < 0) 1080 goto trunc; 1081 bp += advance; 1082 len -= advance; 1083 1084 if (len < 2) 1085 goto trunc; 1086 ND_TCHECK_16BITS(bp); 1087 ND_PRINT((ndo, ",holdtime=")); 1088 unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); 1089 if (len < 3) 1090 goto trunc; 1091 ND_TCHECK(bp[2]); 1092 ND_PRINT((ndo, ",prio=%d", bp[2])); 1093 if (len < 4) 1094 goto trunc; 1095 bp += 4; 1096 len -= 4; 1097 } 1098 ND_PRINT((ndo, ")")); 1099 } 1100 break; 1101 } 1102 case PIMV2_TYPE_ASSERT: 1103 ND_PRINT((ndo, " group=")); 1104 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1105 goto trunc; 1106 bp += advance; len -= advance; 1107 ND_PRINT((ndo, " src=")); 1108 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1109 goto trunc; 1110 bp += advance; len -= advance; 1111 if (len < 8) 1112 goto trunc; 1113 ND_TCHECK2(*bp, 8); 1114 if (bp[0] & 0x80) 1115 ND_PRINT((ndo, " RPT")); 1116 ND_PRINT((ndo, " pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff)); 1117 ND_PRINT((ndo, " metric=%u", EXTRACT_32BITS(&bp[4]))); 1118 break; 1119 1120 case PIMV2_TYPE_CANDIDATE_RP: 1121 { 1122 int i, pfxcnt; 1123 1124 /* Prefix-Cnt, Priority, and Holdtime */ 1125 if (len < 1) 1126 goto trunc; 1127 ND_TCHECK(bp[0]); 1128 ND_PRINT((ndo, " prefix-cnt=%d", bp[0])); 1129 pfxcnt = bp[0]; 1130 if (len < 2) 1131 goto trunc; 1132 ND_TCHECK(bp[1]); 1133 ND_PRINT((ndo, " prio=%d", bp[1])); 1134 if (len < 4) 1135 goto trunc; 1136 ND_TCHECK_16BITS(&bp[2]); 1137 ND_PRINT((ndo, " holdtime=")); 1138 unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); 1139 bp += 4; 1140 len -= 4; 1141 1142 /* Encoded-Unicast-RP-Address */ 1143 ND_PRINT((ndo, " RP=")); 1144 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1145 goto trunc; 1146 bp += advance; 1147 len -= advance; 1148 1149 /* Encoded-Group Addresses */ 1150 for (i = 0; i < pfxcnt && len > 0; i++) { 1151 ND_PRINT((ndo, " Group%d=", i)); 1152 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1153 goto trunc; 1154 bp += advance; 1155 len -= advance; 1156 } 1157 break; 1158 } 1159 1160 case PIMV2_TYPE_PRUNE_REFRESH: 1161 ND_PRINT((ndo, " src=")); 1162 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1163 goto trunc; 1164 bp += advance; 1165 len -= advance; 1166 ND_PRINT((ndo, " grp=")); 1167 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1168 goto trunc; 1169 bp += advance; 1170 len -= advance; 1171 ND_PRINT((ndo, " forwarder=")); 1172 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1173 goto trunc; 1174 bp += advance; 1175 len -= advance; 1176 if (len < 2) 1177 goto trunc; 1178 ND_TCHECK_16BITS(bp); 1179 ND_PRINT((ndo, " TUNR ")); 1180 unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); 1181 break; 1182 1183 1184 default: 1185 ND_PRINT((ndo, " [type %d]", PIM_TYPE(pim->pim_typever))); 1186 break; 1187 } 1188 1189 return; 1190 1191 trunc: 1192 ND_PRINT((ndo, "[|pim]")); 1193 } 1194 1195 /* 1196 * Local Variables: 1197 * c-style: whitesmith 1198 * c-basic-offset: 8 1199 * End: 1200 */ 1201