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 1.12 2024/09/02 16:15:32 christos Exp $"); 25 #endif 26 27 /* \summary: Protocol Independent Multicast (PIM) printer */ 28 29 #include <config.h> 30 31 #include "netdissect-stdinc.h" 32 33 #include "netdissect.h" 34 #include "addrtoname.h" 35 #include "extract.h" 36 37 #include "ip.h" 38 #include "ip6.h" 39 #include "ipproto.h" 40 41 #define PIMV1_TYPE_QUERY 0 42 #define PIMV1_TYPE_REGISTER 1 43 #define PIMV1_TYPE_REGISTER_STOP 2 44 #define PIMV1_TYPE_JOIN_PRUNE 3 45 #define PIMV1_TYPE_RP_REACHABILITY 4 46 #define PIMV1_TYPE_ASSERT 5 47 #define PIMV1_TYPE_GRAFT 6 48 #define PIMV1_TYPE_GRAFT_ACK 7 49 50 static const struct tok pimv1_type_str[] = { 51 { PIMV1_TYPE_QUERY, "Query" }, 52 { PIMV1_TYPE_REGISTER, "Register" }, 53 { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" }, 54 { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" }, 55 { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" }, 56 { PIMV1_TYPE_ASSERT, "Assert" }, 57 { PIMV1_TYPE_GRAFT, "Graft" }, 58 { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" }, 59 { 0, NULL } 60 }; 61 62 #define PIMV2_TYPE_HELLO 0 63 #define PIMV2_TYPE_REGISTER 1 64 #define PIMV2_TYPE_REGISTER_STOP 2 65 #define PIMV2_TYPE_JOIN_PRUNE 3 66 #define PIMV2_TYPE_BOOTSTRAP 4 67 #define PIMV2_TYPE_ASSERT 5 68 #define PIMV2_TYPE_GRAFT 6 69 #define PIMV2_TYPE_GRAFT_ACK 7 70 #define PIMV2_TYPE_CANDIDATE_RP 8 71 #define PIMV2_TYPE_PRUNE_REFRESH 9 72 #define PIMV2_TYPE_DF_ELECTION 10 73 #define PIMV2_TYPE_ECMP_REDIRECT 11 74 75 static const struct tok pimv2_type_values[] = { 76 { PIMV2_TYPE_HELLO, "Hello" }, 77 { PIMV2_TYPE_REGISTER, "Register" }, 78 { PIMV2_TYPE_REGISTER_STOP, "Register Stop" }, 79 { PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" }, 80 { PIMV2_TYPE_BOOTSTRAP, "Bootstrap" }, 81 { PIMV2_TYPE_ASSERT, "Assert" }, 82 { PIMV2_TYPE_GRAFT, "Graft" }, 83 { PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" }, 84 { PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" }, 85 { PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" }, 86 { PIMV2_TYPE_DF_ELECTION, "DF Election" }, 87 { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" }, 88 { 0, NULL} 89 }; 90 91 #define PIMV2_HELLO_OPTION_HOLDTIME 1 92 #define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2 93 #define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18 94 #define PIMV2_HELLO_OPTION_DR_PRIORITY 19 95 #define PIMV2_HELLO_OPTION_GENID 20 96 #define PIMV2_HELLO_OPTION_REFRESH_CAP 21 97 #define PIMV2_HELLO_OPTION_BIDIR_CAP 22 98 #define PIMV2_HELLO_OPTION_ADDRESS_LIST 24 99 #define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001 100 101 static const struct tok pimv2_hello_option_values[] = { 102 { PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" }, 103 { PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" }, 104 { PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" }, 105 { PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" }, 106 { PIMV2_HELLO_OPTION_GENID, "Generation ID" }, 107 { PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" }, 108 { PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" }, 109 { PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" }, 110 { PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" }, 111 { 0, NULL} 112 }; 113 114 #define PIMV2_REGISTER_FLAG_LEN 4 115 #define PIMV2_REGISTER_FLAG_BORDER 0x80000000 116 #define PIMV2_REGISTER_FLAG_NULL 0x40000000 117 118 static const struct tok pimv2_register_flag_values[] = { 119 { PIMV2_REGISTER_FLAG_BORDER, "Border" }, 120 { PIMV2_REGISTER_FLAG_NULL, "Null" }, 121 { 0, NULL} 122 }; 123 124 #define PIMV2_DF_ELECTION_OFFER 1 125 #define PIMV2_DF_ELECTION_WINNER 2 126 #define PIMV2_DF_ELECTION_BACKOFF 3 127 #define PIMV2_DF_ELECTION_PASS 4 128 129 static const struct tok pimv2_df_election_flag_values[] = { 130 { PIMV2_DF_ELECTION_OFFER, "Offer" }, 131 { PIMV2_DF_ELECTION_WINNER, "Winner" }, 132 { PIMV2_DF_ELECTION_BACKOFF, "Backoff" }, 133 { PIMV2_DF_ELECTION_PASS, "Pass" }, 134 { 0, NULL} 135 }; 136 137 #define PIMV2_DF_ELECTION_PASS_BACKOFF_STR(x) ( \ 138 x == PIMV2_DF_ELECTION_BACKOFF ? "offer" : "new winner" ) 139 140 141 /* 142 * XXX: We consider a case where IPv6 is not ready yet for portability, 143 * but PIM dependent definitions should be independent of IPv6... 144 */ 145 146 struct pim { 147 nd_uint8_t pim_typever; 148 /* upper 4bit: PIM version number; 2 for PIMv2 */ 149 /* lower 4bit: the PIM message type, currently they are: 150 * Hello, Register, Register-Stop, Join/Prune, 151 * Bootstrap, Assert, Graft (PIM-DM only), 152 * Graft-Ack (PIM-DM only), C-RP-Adv 153 */ 154 #define PIM_VER(x) (((x) & 0xf0) >> 4) 155 #define PIM_TYPE(x) ((x) & 0x0f) 156 nd_uint8_t pim_rsv; /* Reserved in v1, subtype+address length in v2 */ 157 #define PIM_SUBTYPE(x) (((x) & 0xf0) >> 4) 158 nd_uint16_t pim_cksum; /* IP style check sum */ 159 }; 160 161 static void pimv2_print(netdissect_options *, const u_char *bp, u_int len, const u_char *); 162 163 static void 164 pimv1_join_prune_print(netdissect_options *ndo, 165 const u_char *bp, u_int len) 166 { 167 u_int ngroups, njoin, nprune; 168 u_int njp; 169 170 /* If it's a single group and a single source, use 1-line output. */ 171 if (ND_TTEST_LEN(bp, 30) && GET_U_1(bp + 11) == 1 && 172 ((njoin = GET_BE_U_2(bp + 20)) + GET_BE_U_2(bp + 22)) == 1) { 173 u_int hold; 174 175 ND_PRINT(" RPF %s ", GET_IPADDR_STRING(bp)); 176 hold = GET_BE_U_2(bp + 6); 177 if (hold != 180) { 178 ND_PRINT("Hold "); 179 unsigned_relts_print(ndo, hold); 180 } 181 ND_PRINT("%s (%s/%u, %s", njoin ? "Join" : "Prune", 182 GET_IPADDR_STRING(bp + 26), GET_U_1(bp + 25) & 0x3f, 183 GET_IPADDR_STRING(bp + 12)); 184 if (GET_BE_U_4(bp + 16) != 0xffffffff) 185 ND_PRINT("/%s", GET_IPADDR_STRING(bp + 16)); 186 ND_PRINT(") %s%s %s", 187 (GET_U_1(bp + 24) & 0x01) ? "Sparse" : "Dense", 188 (GET_U_1(bp + 25) & 0x80) ? " WC" : "", 189 (GET_U_1(bp + 25) & 0x40) ? "RP" : "SPT"); 190 return; 191 } 192 193 if (len < sizeof(nd_ipv4)) 194 goto trunc; 195 if (ndo->ndo_vflag > 1) 196 ND_PRINT("\n"); 197 ND_PRINT(" Upstream Nbr: %s", GET_IPADDR_STRING(bp)); 198 bp += 4; 199 len -= 4; 200 if (len < 4) 201 goto trunc; 202 if (ndo->ndo_vflag > 1) 203 ND_PRINT("\n"); 204 ND_PRINT(" Hold time: "); 205 unsigned_relts_print(ndo, GET_BE_U_2(bp + 2)); 206 if (ndo->ndo_vflag < 2) 207 return; 208 bp += 4; 209 len -= 4; 210 211 if (len < 4) 212 goto trunc; 213 ngroups = GET_U_1(bp + 3); 214 bp += 4; 215 len -= 4; 216 while (ngroups != 0) { 217 /* 218 * XXX - does the address have length "addrlen" and the 219 * mask length "maddrlen"? 220 */ 221 if (len < 4) 222 goto trunc; 223 ND_PRINT("\n\tGroup: %s", GET_IPADDR_STRING(bp)); 224 bp += 4; 225 len -= 4; 226 if (len < 4) 227 goto trunc; 228 if (GET_BE_U_4(bp) != 0xffffffff) 229 ND_PRINT("/%s", GET_IPADDR_STRING(bp)); 230 bp += 4; 231 len -= 4; 232 if (len < 4) 233 goto trunc; 234 njoin = GET_BE_U_2(bp); 235 nprune = GET_BE_U_2(bp + 2); 236 ND_PRINT(" joined: %u pruned: %u", njoin, nprune); 237 bp += 4; 238 len -= 4; 239 for (njp = 0; njp < (njoin + nprune); njp++) { 240 const char *type; 241 242 if (njp < njoin) 243 type = "Join "; 244 else 245 type = "Prune"; 246 if (len < 6) 247 goto trunc; 248 ND_PRINT("\n\t%s %s%s%s%s/%u", type, 249 (GET_U_1(bp) & 0x01) ? "Sparse " : "Dense ", 250 (GET_U_1(bp + 1) & 0x80) ? "WC " : "", 251 (GET_U_1(bp + 1) & 0x40) ? "RP " : "SPT ", 252 GET_IPADDR_STRING(bp + 2), 253 GET_U_1(bp + 1) & 0x3f); 254 bp += 6; 255 len -= 6; 256 } 257 ngroups--; 258 } 259 return; 260 trunc: 261 nd_print_trunc(ndo); 262 } 263 264 void 265 pimv1_print(netdissect_options *ndo, 266 const u_char *bp, u_int len) 267 { 268 u_char type; 269 270 ndo->ndo_protocol = "pimv1"; 271 type = GET_U_1(bp + 1); 272 273 ND_PRINT(" %s", tok2str(pimv1_type_str, "[type %u]", type)); 274 switch (type) { 275 case PIMV1_TYPE_QUERY: 276 if (ND_TTEST_1(bp + 8)) { 277 switch (GET_U_1(bp + 8) >> 4) { 278 case 0: 279 ND_PRINT(" Dense-mode"); 280 break; 281 case 1: 282 ND_PRINT(" Sparse-mode"); 283 break; 284 case 2: 285 ND_PRINT(" Sparse-Dense-mode"); 286 break; 287 default: 288 ND_PRINT(" mode-%u", GET_U_1(bp + 8) >> 4); 289 break; 290 } 291 } 292 if (ndo->ndo_vflag) { 293 ND_PRINT(" (Hold-time "); 294 unsigned_relts_print(ndo, GET_BE_U_2(bp + 10)); 295 ND_PRINT(")"); 296 } 297 break; 298 299 case PIMV1_TYPE_REGISTER: 300 ND_TCHECK_LEN(bp + 8, 20); /* ip header */ 301 ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 20), 302 GET_IPADDR_STRING(bp + 24)); 303 break; 304 case PIMV1_TYPE_REGISTER_STOP: 305 ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 8), 306 GET_IPADDR_STRING(bp + 12)); 307 break; 308 case PIMV1_TYPE_RP_REACHABILITY: 309 if (ndo->ndo_vflag) { 310 ND_PRINT(" group %s", GET_IPADDR_STRING(bp + 8)); 311 if (GET_BE_U_4(bp + 12) != 0xffffffff) 312 ND_PRINT("/%s", GET_IPADDR_STRING(bp + 12)); 313 ND_PRINT(" RP %s hold ", GET_IPADDR_STRING(bp + 16)); 314 unsigned_relts_print(ndo, GET_BE_U_2(bp + 22)); 315 } 316 break; 317 case PIMV1_TYPE_ASSERT: 318 ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 16), 319 GET_IPADDR_STRING(bp + 8)); 320 if (GET_BE_U_4(bp + 12) != 0xffffffff) 321 ND_PRINT("/%s", GET_IPADDR_STRING(bp + 12)); 322 ND_PRINT(" %s pref %u metric %u", 323 (GET_U_1(bp + 20) & 0x80) ? "RP-tree" : "SPT", 324 GET_BE_U_4(bp + 20) & 0x7fffffff, 325 GET_BE_U_4(bp + 24)); 326 break; 327 case PIMV1_TYPE_JOIN_PRUNE: 328 case PIMV1_TYPE_GRAFT: 329 case PIMV1_TYPE_GRAFT_ACK: 330 if (ndo->ndo_vflag) { 331 if (len < 8) 332 goto trunc; 333 pimv1_join_prune_print(ndo, bp + 8, len - 8); 334 } 335 break; 336 } 337 if ((GET_U_1(bp + 4) >> 4) != 1) 338 ND_PRINT(" [v%u]", GET_U_1(bp + 4) >> 4); 339 return; 340 341 trunc: 342 nd_print_trunc(ndo); 343 } 344 345 /* 346 * auto-RP is a cisco protocol, documented at 347 * ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt 348 * 349 * This implements version 1+, dated Sept 9, 1998. 350 */ 351 void 352 cisco_autorp_print(netdissect_options *ndo, 353 const u_char *bp, u_int len) 354 { 355 u_int type; 356 u_int numrps; 357 u_int hold; 358 359 ndo->ndo_protocol = "cisco_autorp"; 360 if (len < 8) 361 goto trunc; 362 ND_PRINT(" auto-rp "); 363 type = GET_U_1(bp); 364 switch (type) { 365 case 0x11: 366 ND_PRINT("candidate-advert"); 367 break; 368 case 0x12: 369 ND_PRINT("mapping"); 370 break; 371 default: 372 ND_PRINT("type-0x%02x", type); 373 break; 374 } 375 376 numrps = GET_U_1(bp + 1); 377 378 ND_PRINT(" Hold "); 379 hold = GET_BE_U_2(bp + 2); 380 if (hold) 381 unsigned_relts_print(ndo, GET_BE_U_2(bp + 2)); 382 else 383 ND_PRINT("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 != 0) { 403 u_int nentries; 404 char s; 405 406 if (len < 4) 407 goto trunc; 408 ND_PRINT(" RP %s", GET_IPADDR_STRING(bp)); 409 bp += 4; 410 len -= 4; 411 if (len < 1) 412 goto trunc; 413 switch (GET_U_1(bp) & 0x3) { 414 case 0: ND_PRINT(" PIMv?"); 415 break; 416 case 1: ND_PRINT(" PIMv1"); 417 break; 418 case 2: ND_PRINT(" PIMv2"); 419 break; 420 case 3: ND_PRINT(" PIMv1+2"); 421 break; 422 } 423 if (GET_U_1(bp) & 0xfc) 424 ND_PRINT(" [rsvd=0x%02x]", GET_U_1(bp) & 0xfc); 425 bp += 1; 426 len -= 1; 427 if (len < 1) 428 goto trunc; 429 nentries = GET_U_1(bp); 430 bp += 1; 431 len -= 1; 432 s = ' '; 433 while (nentries != 0) { 434 if (len < 6) 435 goto trunc; 436 ND_PRINT("%c%s%s/%u", s, GET_U_1(bp) & 1 ? "!" : "", 437 GET_IPADDR_STRING(bp + 2), GET_U_1(bp + 1)); 438 if (GET_U_1(bp) & 0x02) { 439 ND_PRINT(" bidir"); 440 } 441 if (GET_U_1(bp) & 0xfc) { 442 ND_PRINT("[rsvd=0x%02x]", GET_U_1(bp) & 0xfc); 443 } 444 s = ','; 445 bp += 6; len -= 6; 446 nentries--; 447 } 448 numrps--; 449 } 450 return; 451 452 trunc: 453 nd_print_trunc(ndo); 454 } 455 456 void 457 pim_print(netdissect_options *ndo, 458 const u_char *bp, u_int len, const u_char *bp2) 459 { 460 const struct pim *pim = (const struct pim *)bp; 461 uint8_t pim_typever; 462 463 ndo->ndo_protocol = "pim"; 464 465 pim_typever = GET_U_1(pim->pim_typever); 466 switch (PIM_VER(pim_typever)) { 467 case 2: 468 if (!ndo->ndo_vflag) { 469 ND_PRINT("PIMv%u, %s, length %u", 470 PIM_VER(pim_typever), 471 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever)), 472 len); 473 return; 474 } else { 475 ND_PRINT("PIMv%u, length %u\n\t%s", 476 PIM_VER(pim_typever), 477 len, 478 tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever))); 479 pimv2_print(ndo, bp, len, bp2); 480 } 481 break; 482 default: 483 ND_PRINT("PIMv%u, length %u", 484 PIM_VER(pim_typever), 485 len); 486 break; 487 } 488 } 489 490 /* 491 * PIMv2 uses encoded address representations. 492 * 493 * The last PIM-SM I-D before RFC2117 was published specified the 494 * following representation for unicast addresses. However, RFC2117 495 * specified no encoding for unicast addresses with the unicast 496 * address length specified in the header. Therefore, we have to 497 * guess which encoding is being used (Cisco's PIMv2 implementation 498 * uses the non-RFC encoding). RFC2117 turns a previously "Reserved" 499 * field into a 'unicast-address-length-in-bytes' field. We guess 500 * that it's the draft encoding if this reserved field is zero. 501 * 502 * RFC2362 goes back to the encoded format, and calls the addr length 503 * field "reserved" again. 504 * 505 * The first byte is the address family, from: 506 * 507 * 0 Reserved 508 * 1 IP (IP version 4) 509 * 2 IP6 (IP version 6) 510 * 3 NSAP 511 * 4 HDLC (8-bit multidrop) 512 * 5 BBN 1822 513 * 6 802 (includes all 802 media plus Ethernet "canonical format") 514 * 7 E.163 515 * 8 E.164 (SMDS, Frame Relay, ATM) 516 * 9 F.69 (Telex) 517 * 10 X.121 (X.25, Frame Relay) 518 * 11 IPX 519 * 12 Appletalk 520 * 13 Decnet IV 521 * 14 Banyan Vines 522 * 15 E.164 with NSAP format subaddress 523 * 524 * In addition, the second byte is an "Encoding". 0 is the default 525 * encoding for the address family, and no other encodings are currently 526 * specified. 527 * 528 */ 529 530 enum pimv2_addrtype { 531 pimv2_unicast, pimv2_group, pimv2_source 532 }; 533 534 /* 0 1 2 3 535 * 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 1 536 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 537 * | Addr Family | Encoding Type | Unicast Address | 538 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++ 539 * 0 1 2 3 540 * 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 1 541 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 542 * | Addr Family | Encoding Type | Reserved | Mask Len | 543 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 544 * | Group multicast Address | 545 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 546 * 0 1 2 3 547 * 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 1 548 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 549 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len | 550 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 551 * | Source Address | 552 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 553 */ 554 static int 555 pimv2_addr_print(netdissect_options *ndo, 556 const u_char *bp, u_int len, enum pimv2_addrtype at, 557 u_int addr_len, int silent) 558 { 559 u_int af; 560 int hdrlen; 561 562 if (addr_len == 0) { 563 if (len < 2) 564 goto trunc; 565 switch (GET_U_1(bp)) { 566 case 1: 567 af = AF_INET; 568 addr_len = (u_int)sizeof(nd_ipv4); 569 break; 570 case 2: 571 af = AF_INET6; 572 addr_len = (u_int)sizeof(nd_ipv6); 573 break; 574 default: 575 return -1; 576 } 577 if (GET_U_1(bp + 1) != 0) 578 return -1; 579 hdrlen = 2; 580 } else { 581 switch (addr_len) { 582 case sizeof(nd_ipv4): 583 af = AF_INET; 584 break; 585 case sizeof(nd_ipv6): 586 af = AF_INET6; 587 break; 588 default: 589 return -1; 590 break; 591 } 592 hdrlen = 0; 593 } 594 595 bp += hdrlen; 596 len -= hdrlen; 597 switch (at) { 598 case pimv2_unicast: 599 if (len < addr_len) 600 goto trunc; 601 ND_TCHECK_LEN(bp, addr_len); 602 if (af == AF_INET) { 603 if (!silent) 604 ND_PRINT("%s", GET_IPADDR_STRING(bp)); 605 } else if (af == AF_INET6) { 606 if (!silent) 607 ND_PRINT("%s", GET_IP6ADDR_STRING(bp)); 608 } 609 return hdrlen + addr_len; 610 case pimv2_group: 611 case pimv2_source: 612 if (len < addr_len + 2) 613 goto trunc; 614 ND_TCHECK_LEN(bp, addr_len + 2); 615 if (af == AF_INET) { 616 if (!silent) { 617 ND_PRINT("%s", GET_IPADDR_STRING(bp + 2)); 618 if (GET_U_1(bp + 1) != 32) 619 ND_PRINT("/%u", GET_U_1(bp + 1)); 620 } 621 } else if (af == AF_INET6) { 622 if (!silent) { 623 ND_PRINT("%s", GET_IP6ADDR_STRING(bp + 2)); 624 if (GET_U_1(bp + 1) != 128) 625 ND_PRINT("/%u", GET_U_1(bp + 1)); 626 } 627 } 628 if (GET_U_1(bp) && !silent) { 629 if (at == pimv2_group) { 630 ND_PRINT("(0x%02x)", GET_U_1(bp)); 631 } else { 632 ND_PRINT("(%s%s%s", 633 GET_U_1(bp) & 0x04 ? "S" : "", 634 GET_U_1(bp) & 0x02 ? "W" : "", 635 GET_U_1(bp) & 0x01 ? "R" : ""); 636 if (GET_U_1(bp) & 0xf8) { 637 ND_PRINT("+0x%02x", 638 GET_U_1(bp) & 0xf8); 639 } 640 ND_PRINT(")"); 641 } 642 } 643 return hdrlen + 2 + addr_len; 644 default: 645 return -1; 646 } 647 trunc: 648 return -1; 649 } 650 651 enum checksum_status { 652 CORRECT, 653 INCORRECT, 654 UNVERIFIED 655 }; 656 657 static enum checksum_status 658 pimv2_check_checksum(netdissect_options *ndo, const u_char *bp, 659 const u_char *bp2, u_int len) 660 { 661 const struct ip *ip; 662 u_int cksum; 663 664 if (!ND_TTEST_LEN(bp, len)) { 665 /* We don't have all the data. */ 666 return (UNVERIFIED); 667 } 668 ip = (const struct ip *)bp2; 669 if (IP_V(ip) == 4) { 670 struct cksum_vec vec[1]; 671 672 vec[0].ptr = bp; 673 vec[0].len = len; 674 cksum = in_cksum(vec, 1); 675 return (cksum ? INCORRECT : CORRECT); 676 } else if (IP_V(ip) == 6) { 677 const struct ip6_hdr *ip6; 678 679 ip6 = (const struct ip6_hdr *)bp2; 680 cksum = nextproto6_cksum(ndo, ip6, bp, len, len, IPPROTO_PIM); 681 return (cksum ? INCORRECT : CORRECT); 682 } else { 683 return (UNVERIFIED); 684 } 685 } 686 687 static void 688 pimv2_print(netdissect_options *ndo, 689 const u_char *bp, u_int len, const u_char *bp2) 690 { 691 const struct pim *pim = (const struct pim *)bp; 692 int advance; 693 int subtype; 694 enum checksum_status cksum_status; 695 u_int pim_typever; 696 u_int pimv2_addr_len; 697 698 ndo->ndo_protocol = "pimv2"; 699 if (len < 2) { 700 ND_PRINT("[length %u < 2]", len); 701 nd_print_invalid(ndo); 702 return; 703 } 704 pim_typever = GET_U_1(pim->pim_typever); 705 /* RFC5015 allocates the high 4 bits of pim_rsv for "subtype". */ 706 pimv2_addr_len = GET_U_1(pim->pim_rsv) & 0x0f; 707 if (pimv2_addr_len != 0) 708 ND_PRINT(", RFC2117-encoding"); 709 710 if (len < 4) { 711 ND_PRINT("[length %u < 4]", len); 712 nd_print_invalid(ndo); 713 return; 714 } 715 ND_PRINT(", cksum 0x%04x ", GET_BE_U_2(pim->pim_cksum)); 716 if (GET_BE_U_2(pim->pim_cksum) == 0) { 717 ND_PRINT("(unverified)"); 718 } else { 719 if (PIM_TYPE(pim_typever) == PIMV2_TYPE_REGISTER) { 720 /* 721 * The checksum only covers the packet header, 722 * not the encapsulated packet. 723 */ 724 cksum_status = pimv2_check_checksum(ndo, bp, bp2, 8); 725 if (cksum_status == INCORRECT) { 726 /* 727 * To quote RFC 4601, "For interoperability 728 * reasons, a message carrying a checksum 729 * calculated over the entire PIM Register 730 * message should also be accepted." 731 */ 732 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len); 733 } 734 } else { 735 /* 736 * The checksum covers the entire packet. 737 */ 738 cksum_status = pimv2_check_checksum(ndo, bp, bp2, len); 739 } 740 switch (cksum_status) { 741 742 case CORRECT: 743 ND_PRINT("(correct)"); 744 break; 745 746 case INCORRECT: 747 ND_PRINT("(incorrect)"); 748 break; 749 750 case UNVERIFIED: 751 ND_PRINT("(unverified)"); 752 break; 753 } 754 } 755 bp += 4; 756 len -= 4; 757 758 switch (PIM_TYPE(pim_typever)) { 759 case PIMV2_TYPE_HELLO: 760 { 761 uint16_t otype, olen; 762 while (len > 0) { 763 if (len < 4) 764 goto trunc; 765 otype = GET_BE_U_2(bp); 766 olen = GET_BE_U_2(bp + 2); 767 ND_PRINT("\n\t %s Option (%u), length %u, Value: ", 768 tok2str(pimv2_hello_option_values, "Unknown", otype), 769 otype, 770 olen); 771 bp += 4; 772 len -= 4; 773 774 if (len < olen) 775 goto trunc; 776 ND_TCHECK_LEN(bp, olen); 777 switch (otype) { 778 case PIMV2_HELLO_OPTION_HOLDTIME: 779 if (olen != 2) { 780 ND_PRINT("[option length %u != 2]", olen); 781 nd_print_invalid(ndo); 782 return; 783 } else { 784 unsigned_relts_print(ndo, 785 GET_BE_U_2(bp)); 786 } 787 break; 788 789 case PIMV2_HELLO_OPTION_LANPRUNEDELAY: 790 if (olen != 4) { 791 ND_PRINT("[option length %u != 4]", olen); 792 nd_print_invalid(ndo); 793 return; 794 } else { 795 char t_bit; 796 uint16_t lan_delay, override_interval; 797 lan_delay = GET_BE_U_2(bp); 798 override_interval = GET_BE_U_2(bp + 2); 799 t_bit = (lan_delay & 0x8000)? 1 : 0; 800 lan_delay &= ~0x8000; 801 ND_PRINT("\n\t T-bit=%u, LAN delay %ums, Override interval %ums", 802 t_bit, lan_delay, override_interval); 803 } 804 break; 805 806 case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD: 807 case PIMV2_HELLO_OPTION_DR_PRIORITY: 808 switch (olen) { 809 case 0: 810 ND_PRINT("Bi-Directional Capability (Old)"); 811 break; 812 case 4: 813 ND_PRINT("%u", GET_BE_U_4(bp)); 814 break; 815 default: 816 ND_PRINT("[option length %u != 4]", olen); 817 nd_print_invalid(ndo); 818 return; 819 break; 820 } 821 break; 822 823 case PIMV2_HELLO_OPTION_GENID: 824 if (olen != 4) { 825 ND_PRINT("[option length %u != 4]", olen); 826 nd_print_invalid(ndo); 827 return; 828 } else { 829 ND_PRINT("0x%08x", GET_BE_U_4(bp)); 830 } 831 break; 832 833 case PIMV2_HELLO_OPTION_REFRESH_CAP: 834 if (olen != 4) { 835 ND_PRINT("[option length %u != 4]", olen); 836 nd_print_invalid(ndo); 837 return; 838 } else { 839 ND_PRINT("v%u", GET_U_1(bp)); 840 if (GET_U_1(bp + 1) != 0) { 841 ND_PRINT(", interval "); 842 unsigned_relts_print(ndo, 843 GET_U_1(bp + 1)); 844 } 845 if (GET_BE_U_2(bp + 2) != 0) { 846 ND_PRINT(" ?0x%04x?", 847 GET_BE_U_2(bp + 2)); 848 } 849 } 850 break; 851 852 case PIMV2_HELLO_OPTION_BIDIR_CAP: 853 break; 854 855 case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD: 856 case PIMV2_HELLO_OPTION_ADDRESS_LIST: 857 if (ndo->ndo_vflag > 1) { 858 const u_char *ptr = bp; 859 u_int plen = len; 860 while (ptr < (bp+olen)) { 861 ND_PRINT("\n\t "); 862 advance = pimv2_addr_print(ndo, ptr, plen, pimv2_unicast, pimv2_addr_len, 0); 863 if (advance < 0) 864 goto trunc; 865 ptr += advance; 866 plen -= advance; 867 } 868 } 869 break; 870 default: 871 if (ndo->ndo_vflag <= 1) 872 print_unknown_data(ndo, bp, "\n\t ", olen); 873 break; 874 } 875 /* do we want to see an additionally hexdump ? */ 876 if (ndo->ndo_vflag> 1) 877 print_unknown_data(ndo, bp, "\n\t ", olen); 878 bp += olen; 879 len -= olen; 880 } 881 break; 882 } 883 884 case PIMV2_TYPE_REGISTER: 885 { 886 const struct ip *ip; 887 888 if (len < 4) 889 goto trunc; 890 ND_TCHECK_LEN(bp, PIMV2_REGISTER_FLAG_LEN); 891 892 ND_PRINT(", Flags [ %s ]\n\t", 893 tok2str(pimv2_register_flag_values, 894 "none", 895 GET_BE_U_4(bp))); 896 897 bp += 4; len -= 4; 898 /* encapsulated multicast packet */ 899 if (len == 0) 900 goto trunc; 901 ip = (const struct ip *)bp; 902 switch (IP_V(ip)) { 903 case 0: /* Null header */ 904 ND_PRINT("IP-Null-header %s > %s", 905 GET_IPADDR_STRING(ip->ip_src), 906 GET_IPADDR_STRING(ip->ip_dst)); 907 break; 908 909 case 4: /* IPv4 */ 910 ip_print(ndo, bp, len); 911 break; 912 913 case 6: /* IPv6 */ 914 ip6_print(ndo, bp, len); 915 break; 916 917 default: 918 ND_PRINT("IP ver %u", IP_V(ip)); 919 break; 920 } 921 break; 922 } 923 924 case PIMV2_TYPE_REGISTER_STOP: 925 ND_PRINT(" group="); 926 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 927 goto trunc; 928 bp += advance; len -= advance; 929 ND_PRINT(" source="); 930 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 931 goto trunc; 932 bp += advance; len -= advance; 933 break; 934 935 case PIMV2_TYPE_JOIN_PRUNE: 936 case PIMV2_TYPE_GRAFT: 937 case PIMV2_TYPE_GRAFT_ACK: 938 939 940 /* 941 * 0 1 2 3 942 * 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 1 943 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 944 * |PIM Ver| Type | Addr length | Checksum | 945 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 946 * | Unicast-Upstream Neighbor Address | 947 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 948 * | Reserved | Num groups | Holdtime | 949 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 950 * | Encoded-Multicast Group Address-1 | 951 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 952 * | Number of Joined Sources | Number of Pruned Sources | 953 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 954 * | Encoded-Joined Source Address-1 | 955 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 956 * | . | 957 * | . | 958 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 959 * | Encoded-Joined Source Address-n | 960 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 961 * | Encoded-Pruned Source Address-1 | 962 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 963 * | . | 964 * | . | 965 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 966 * | Encoded-Pruned Source Address-n | 967 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 968 * | . | 969 * | . | 970 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 971 * | Encoded-Multicast Group Address-n | 972 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 973 */ 974 975 { 976 uint8_t ngroup; 977 uint16_t holdtime; 978 uint16_t njoin; 979 uint16_t nprune; 980 u_int i, j; 981 982 if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/ 983 ND_PRINT(", upstream-neighbor: "); 984 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 985 goto trunc; 986 bp += advance; len -= advance; 987 } 988 if (len < 4) 989 goto trunc; 990 ND_TCHECK_4(bp); 991 ngroup = GET_U_1(bp + 1); 992 holdtime = GET_BE_U_2(bp + 2); 993 ND_PRINT("\n\t %u group(s)", ngroup); 994 if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/ 995 ND_PRINT(", holdtime: "); 996 if (holdtime == 0xffff) 997 ND_PRINT("infinite"); 998 else 999 unsigned_relts_print(ndo, holdtime); 1000 } 1001 bp += 4; len -= 4; 1002 for (i = 0; i < ngroup; i++) { 1003 ND_PRINT("\n\t group #%u: ", i+1); 1004 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1005 goto trunc; 1006 bp += advance; len -= advance; 1007 if (len < 4) 1008 goto trunc; 1009 ND_TCHECK_4(bp); 1010 njoin = GET_BE_U_2(bp); 1011 nprune = GET_BE_U_2(bp + 2); 1012 ND_PRINT(", joined sources: %u, pruned sources: %u", njoin, nprune); 1013 bp += 4; len -= 4; 1014 for (j = 0; j < njoin; j++) { 1015 ND_PRINT("\n\t joined source #%u: ", j+1); 1016 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) 1017 goto trunc; 1018 bp += advance; len -= advance; 1019 } 1020 for (j = 0; j < nprune; j++) { 1021 ND_PRINT("\n\t pruned source #%u: ", j+1); 1022 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) 1023 goto trunc; 1024 bp += advance; len -= advance; 1025 } 1026 } 1027 break; 1028 } 1029 1030 case PIMV2_TYPE_BOOTSTRAP: 1031 { 1032 u_int i, j, frpcnt; 1033 1034 /* Fragment Tag, Hash Mask len, and BSR-priority */ 1035 if (len < 2) 1036 goto trunc; 1037 ND_PRINT(" tag=%x", GET_BE_U_2(bp)); 1038 bp += 2; 1039 len -= 2; 1040 if (len < 1) 1041 goto trunc; 1042 ND_PRINT(" hashmlen=%u", GET_U_1(bp)); 1043 if (len < 2) 1044 goto trunc; 1045 ND_TCHECK_1(bp + 2); 1046 ND_PRINT(" BSRprio=%u", GET_U_1(bp + 1)); 1047 bp += 2; 1048 len -= 2; 1049 1050 /* Encoded-Unicast-BSR-Address */ 1051 ND_PRINT(" BSR="); 1052 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1053 goto trunc; 1054 bp += advance; 1055 len -= advance; 1056 1057 for (i = 0; len > 0; i++) { 1058 /* Encoded-Group Address */ 1059 ND_PRINT(" (group%u: ", i); 1060 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1061 goto trunc; 1062 bp += advance; 1063 len -= advance; 1064 1065 /* RP-Count, Frag RP-Cnt, and rsvd */ 1066 if (len < 1) 1067 goto trunc; 1068 ND_PRINT(" RPcnt=%u", GET_U_1(bp)); 1069 if (len < 2) 1070 goto trunc; 1071 frpcnt = GET_U_1(bp + 1); 1072 ND_PRINT(" FRPcnt=%u", frpcnt); 1073 if (len < 4) 1074 goto trunc; 1075 bp += 4; 1076 len -= 4; 1077 1078 for (j = 0; j < frpcnt && len > 0; j++) { 1079 /* each RP info */ 1080 ND_PRINT(" RP%u=", j); 1081 if ((advance = pimv2_addr_print(ndo, bp, len, 1082 pimv2_unicast, 1083 pimv2_addr_len, 1084 0)) < 0) 1085 goto trunc; 1086 bp += advance; 1087 len -= advance; 1088 1089 if (len < 2) 1090 goto trunc; 1091 ND_PRINT(",holdtime="); 1092 unsigned_relts_print(ndo, 1093 GET_BE_U_2(bp)); 1094 if (len < 3) 1095 goto trunc; 1096 ND_PRINT(",prio=%u", GET_U_1(bp + 2)); 1097 if (len < 4) 1098 goto trunc; 1099 bp += 4; 1100 len -= 4; 1101 } 1102 ND_PRINT(")"); 1103 } 1104 break; 1105 } 1106 case PIMV2_TYPE_ASSERT: 1107 ND_PRINT(" group="); 1108 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1109 goto trunc; 1110 bp += advance; len -= advance; 1111 ND_PRINT(" src="); 1112 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1113 goto trunc; 1114 bp += advance; len -= advance; 1115 if (len < 8) 1116 goto trunc; 1117 ND_TCHECK_8(bp); 1118 if (GET_U_1(bp) & 0x80) 1119 ND_PRINT(" RPT"); 1120 ND_PRINT(" pref=%u", GET_BE_U_4(bp) & 0x7fffffff); 1121 ND_PRINT(" metric=%u", GET_BE_U_4(bp + 4)); 1122 break; 1123 1124 case PIMV2_TYPE_CANDIDATE_RP: 1125 { 1126 u_int i, pfxcnt; 1127 1128 /* Prefix-Cnt, Priority, and Holdtime */ 1129 if (len < 1) 1130 goto trunc; 1131 ND_PRINT(" prefix-cnt=%u", GET_U_1(bp)); 1132 pfxcnt = GET_U_1(bp); 1133 if (len < 2) 1134 goto trunc; 1135 ND_PRINT(" prio=%u", GET_U_1(bp + 1)); 1136 if (len < 4) 1137 goto trunc; 1138 ND_PRINT(" holdtime="); 1139 unsigned_relts_print(ndo, GET_BE_U_2(bp + 2)); 1140 bp += 4; 1141 len -= 4; 1142 1143 /* Encoded-Unicast-RP-Address */ 1144 ND_PRINT(" RP="); 1145 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1146 goto trunc; 1147 bp += advance; 1148 len -= advance; 1149 1150 /* Encoded-Group Addresses */ 1151 for (i = 0; i < pfxcnt && len > 0; i++) { 1152 ND_PRINT(" Group%u=", i); 1153 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1154 goto trunc; 1155 bp += advance; 1156 len -= advance; 1157 } 1158 break; 1159 } 1160 1161 case PIMV2_TYPE_PRUNE_REFRESH: 1162 ND_PRINT(" src="); 1163 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1164 goto trunc; 1165 bp += advance; 1166 len -= advance; 1167 ND_PRINT(" grp="); 1168 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) 1169 goto trunc; 1170 bp += advance; 1171 len -= advance; 1172 ND_PRINT(" forwarder="); 1173 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) 1174 goto trunc; 1175 bp += advance; 1176 len -= advance; 1177 if (len < 2) 1178 goto trunc; 1179 ND_PRINT(" TUNR "); 1180 unsigned_relts_print(ndo, GET_BE_U_2(bp)); 1181 break; 1182 1183 case PIMV2_TYPE_DF_ELECTION: 1184 subtype = PIM_SUBTYPE(GET_U_1(pim->pim_rsv)); 1185 ND_PRINT("\n\t %s,", tok2str( pimv2_df_election_flag_values, 1186 "Unknown", subtype) ); 1187 1188 ND_PRINT(" rpa="); 1189 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) { 1190 goto trunc; 1191 } 1192 bp += advance; 1193 len -= advance; 1194 ND_PRINT(" sender pref=%u", GET_BE_U_4(bp) ); 1195 ND_PRINT(" sender metric=%u", GET_BE_U_4(bp + 4)); 1196 1197 bp += 8; 1198 len -= 8; 1199 1200 switch (subtype) { 1201 case PIMV2_DF_ELECTION_BACKOFF: 1202 case PIMV2_DF_ELECTION_PASS: 1203 ND_PRINT("\n\t %s addr=", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype)); 1204 if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) { 1205 goto trunc; 1206 } 1207 bp += advance; 1208 len -= advance; 1209 1210 ND_PRINT(" %s pref=%u", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype), GET_BE_U_4(bp) ); 1211 ND_PRINT(" %s metric=%u", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype), GET_BE_U_4(bp + 4)); 1212 1213 bp += 8; 1214 len -= 8; 1215 1216 if (subtype == PIMV2_DF_ELECTION_BACKOFF) { 1217 ND_PRINT(" interval %dms", GET_BE_U_2(bp)); 1218 } 1219 1220 break; 1221 default: 1222 break; 1223 } 1224 break; 1225 1226 default: 1227 ND_PRINT(" [type %u]", PIM_TYPE(pim_typever)); 1228 break; 1229 } 1230 1231 return; 1232 1233 trunc: 1234 nd_print_trunc(ndo); 1235 } 1236
Indexes created Fri Oct 02 00:25:19 UTC 2026