1 /* 2 * Copyright (c) 2016 Antonin Dcimo, Jean-Raphal Gaglione 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Neither the name of the project nor the names of its contributors 13 * may be used to endorse or promote products derived from this software 14 * without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* \summary: Home Networking Control Protocol (HNCP) printer */ 30 31 #ifdef HAVE_CONFIG_H 32 #include "config.h" 33 #endif 34 35 #include <netdissect-stdinc.h> 36 37 #include <stdlib.h> 38 #include <string.h> 39 40 #include "netdissect.h" 41 #include "addrtoname.h" 42 #include "extract.h" 43 44 static void 45 hncp_print_rec(netdissect_options *ndo, 46 const u_char *cp, u_int length, int indent); 47 48 void 49 hncp_print(netdissect_options *ndo, 50 const u_char *cp, u_int length) 51 { 52 ND_PRINT((ndo, "hncp (%d)", length)); 53 hncp_print_rec(ndo, cp, length, 1); 54 } 55 56 /* RFC7787 */ 57 #define DNCP_REQUEST_NETWORK_STATE 1 58 #define DNCP_REQUEST_NODE_STATE 2 59 #define DNCP_NODE_ENDPOINT 3 60 #define DNCP_NETWORK_STATE 4 61 #define DNCP_NODE_STATE 5 62 #define DNCP_PEER 8 63 #define DNCP_KEEP_ALIVE_INTERVAL 9 64 #define DNCP_TRUST_VERDICT 10 65 66 /* RFC7788 */ 67 #define HNCP_HNCP_VERSION 32 68 #define HNCP_EXTERNAL_CONNECTION 33 69 #define HNCP_DELEGATED_PREFIX 34 70 #define HNCP_PREFIX_POLICY 43 71 #define HNCP_DHCPV4_DATA 37 72 #define HNCP_DHCPV6_DATA 38 73 #define HNCP_ASSIGNED_PREFIX 35 74 #define HNCP_NODE_ADDRESS 36 75 #define HNCP_DNS_DELEGATED_ZONE 39 76 #define HNCP_DOMAIN_NAME 40 77 #define HNCP_NODE_NAME 41 78 #define HNCP_MANAGED_PSK 42 79 80 /* See type_mask in hncp_print_rec below */ 81 #define RANGE_DNCP_RESERVED 0x10000 82 #define RANGE_HNCP_UNASSIGNED 0x10001 83 #define RANGE_DNCP_PRIVATE_USE 0x10002 84 #define RANGE_DNCP_FUTURE_USE 0x10003 85 86 static const struct tok type_values[] = { 87 { DNCP_REQUEST_NETWORK_STATE, "Request network state" }, 88 { DNCP_REQUEST_NODE_STATE, "Request node state" }, 89 { DNCP_NODE_ENDPOINT, "Node endpoint" }, 90 { DNCP_NETWORK_STATE, "Network state" }, 91 { DNCP_NODE_STATE, "Node state" }, 92 { DNCP_PEER, "Peer" }, 93 { DNCP_KEEP_ALIVE_INTERVAL, "Keep-alive interval" }, 94 { DNCP_TRUST_VERDICT, "Trust-Verdict" }, 95 96 { HNCP_HNCP_VERSION, "HNCP-Version" }, 97 { HNCP_EXTERNAL_CONNECTION, "External-Connection" }, 98 { HNCP_DELEGATED_PREFIX, "Delegated-Prefix" }, 99 { HNCP_PREFIX_POLICY, "Prefix-Policy" }, 100 { HNCP_DHCPV4_DATA, "DHCPv4-Data" }, 101 { HNCP_DHCPV6_DATA, "DHCPv6-Data" }, 102 { HNCP_ASSIGNED_PREFIX, "Assigned-Prefix" }, 103 { HNCP_NODE_ADDRESS, "Node-Address" }, 104 { HNCP_DNS_DELEGATED_ZONE, "DNS-Delegated-Zone" }, 105 { HNCP_DOMAIN_NAME, "Domain-Name" }, 106 { HNCP_NODE_NAME, "Node-Name" }, 107 { HNCP_MANAGED_PSK, "Managed-PSK" }, 108 109 { RANGE_DNCP_RESERVED, "Reserved" }, 110 { RANGE_HNCP_UNASSIGNED, "Unassigned" }, 111 { RANGE_DNCP_PRIVATE_USE, "Private use" }, 112 { RANGE_DNCP_FUTURE_USE, "Future use" }, 113 114 { 0, NULL} 115 }; 116 117 #define DH4OPT_DNS_SERVERS 6 /* RFC2132 */ 118 #define DH4OPT_NTP_SERVERS 42 /* RFC2132 */ 119 #define DH4OPT_DOMAIN_SEARCH 119 /* RFC3397 */ 120 121 static const struct tok dh4opt_str[] = { 122 { DH4OPT_DNS_SERVERS, "DNS-server" }, 123 { DH4OPT_NTP_SERVERS, "NTP-server"}, 124 { DH4OPT_DOMAIN_SEARCH, "DNS-search" }, 125 { 0, NULL } 126 }; 127 128 #define DH6OPT_DNS_SERVERS 23 /* RFC3646 */ 129 #define DH6OPT_DOMAIN_LIST 24 /* RFC3646 */ 130 #define DH6OPT_SNTP_SERVERS 31 /* RFC4075 */ 131 132 static const struct tok dh6opt_str[] = { 133 { DH6OPT_DNS_SERVERS, "DNS-server" }, 134 { DH6OPT_DOMAIN_LIST, "DNS-search-list" }, 135 { DH6OPT_SNTP_SERVERS, "SNTP-servers" }, 136 { 0, NULL } 137 }; 138 139 /* 140 * For IPv4-mapped IPv6 addresses, length of the prefix that precedes 141 * the 4 bytes of IPv4 address at the end of the IPv6 address. 142 */ 143 #define IPV4_MAPPED_HEADING_LEN 12 144 145 /* 146 * Is an IPv6 address an IPv4-mapped address? 147 */ 148 static inline int 149 is_ipv4_mapped_address(const u_char *addr) 150 { 151 /* The value of the prefix */ 152 static const u_char ipv4_mapped_heading[IPV4_MAPPED_HEADING_LEN] = 153 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF }; 154 155 return memcmp(addr, ipv4_mapped_heading, IPV4_MAPPED_HEADING_LEN) == 0; 156 } 157 158 static const char * 159 format_nid(const u_char *data) 160 { 161 static char buf[4][11+5]; 162 static int i = 0; 163 i = (i + 1) % 4; 164 snprintf(buf[i], 16, "%02x:%02x:%02x:%02x", 165 data[0], data[1], data[2], data[3]); 166 return buf[i]; 167 } 168 169 static const char * 170 format_256(const u_char *data) 171 { 172 static char buf[4][64+5]; 173 static int i = 0; 174 i = (i + 1) % 4; 175 snprintf(buf[i], 28, "%016" PRIx64 "%016" PRIx64 "%016" PRIx64 "%016" PRIx64, 176 EXTRACT_64BITS(data), 177 EXTRACT_64BITS(data + 8), 178 EXTRACT_64BITS(data + 16), 179 EXTRACT_64BITS(data + 24) 180 ); 181 return buf[i]; 182 } 183 184 static const char * 185 format_interval(const uint32_t n) 186 { 187 static char buf[4][sizeof("0000000.000s")]; 188 static int i = 0; 189 i = (i + 1) % 4; 190 snprintf(buf[i], sizeof(buf[i]), "%u.%03us", n / 1000, n % 1000); 191 return buf[i]; 192 } 193 194 static const char * 195 format_ip6addr(netdissect_options *ndo, const u_char *cp) 196 { 197 if (is_ipv4_mapped_address(cp)) 198 return ipaddr_string(ndo, cp + IPV4_MAPPED_HEADING_LEN); 199 else 200 return ip6addr_string(ndo, cp); 201 } 202 203 static int 204 print_prefix(netdissect_options *ndo, const u_char *prefix, u_int max_length) 205 { 206 int plenbytes; 207 char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx::/128")]; 208 209 if (prefix[0] >= 96 && max_length >= IPV4_MAPPED_HEADING_LEN + 1 && 210 is_ipv4_mapped_address(&prefix[1])) { 211 struct in_addr addr; 212 u_int plen; 213 214 plen = prefix[0]-96; 215 if (32 < plen) 216 return -1; 217 max_length -= 1; 218 219 memset(&addr, 0, sizeof(addr)); 220 plenbytes = (plen + 7) / 8; 221 if (max_length < (u_int)plenbytes + IPV4_MAPPED_HEADING_LEN) 222 return -3; 223 memcpy(&addr, &prefix[1 + IPV4_MAPPED_HEADING_LEN], plenbytes); 224 if (plen % 8) { 225 ((u_char *)&addr)[plenbytes - 1] &= 226 ((0xff00 >> (plen % 8)) & 0xff); 227 } 228 snprintf(buf, sizeof(buf), "%s/%d", ipaddr_string(ndo, &addr), plen); 229 plenbytes += 1 + IPV4_MAPPED_HEADING_LEN; 230 } else { 231 plenbytes = decode_prefix6(ndo, prefix, max_length, buf, sizeof(buf)); 232 } 233 234 ND_PRINT((ndo, "%s", buf)); 235 return plenbytes; 236 } 237 238 static int 239 print_dns_label(netdissect_options *ndo, 240 const u_char *cp, u_int max_length, int print) 241 { 242 u_int length = 0; 243 while (length < max_length) { 244 u_int lab_length = cp[length++]; 245 if (lab_length == 0) 246 return (int)length; 247 if (length > 1 && print) 248 safeputchar(ndo, '.'); 249 if (length+lab_length > max_length) { 250 if (print) 251 safeputs(ndo, cp+length, max_length-length); 252 break; 253 } 254 if (print) 255 safeputs(ndo, cp+length, lab_length); 256 length += lab_length; 257 } 258 if (print) 259 ND_PRINT((ndo, "[|DNS]")); 260 return -1; 261 } 262 263 static int 264 dhcpv4_print(netdissect_options *ndo, 265 const u_char *cp, u_int length, int indent) 266 { 267 u_int i, t; 268 const u_char *tlv, *value; 269 uint8_t type, optlen; 270 271 i = 0; 272 while (i < length) { 273 if (i + 2 > length) 274 return -1; 275 tlv = cp + i; 276 type = (uint8_t)tlv[0]; 277 optlen = (uint8_t)tlv[1]; 278 value = tlv + 2; 279 280 ND_PRINT((ndo, "\n")); 281 for (t = indent; t > 0; t--) 282 ND_PRINT((ndo, "\t")); 283 284 ND_PRINT((ndo, "%s", tok2str(dh4opt_str, "Unknown", type))); 285 ND_PRINT((ndo," (%u)", optlen + 2 )); 286 if (i + 2 + optlen > length) 287 return -1; 288 289 switch (type) { 290 case DH4OPT_DNS_SERVERS: 291 case DH4OPT_NTP_SERVERS: { 292 if (optlen < 4 || optlen % 4 != 0) { 293 return -1; 294 } 295 for (t = 0; t < optlen; t += 4) 296 ND_PRINT((ndo, " %s", ipaddr_string(ndo, value + t))); 297 } 298 break; 299 case DH4OPT_DOMAIN_SEARCH: { 300 const u_char *tp = value; 301 while (tp < value + optlen) { 302 ND_PRINT((ndo, " ")); 303 if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL) 304 return -1; 305 } 306 } 307 break; 308 } 309 310 i += 2 + optlen; 311 } 312 return 0; 313 } 314 315 static int 316 dhcpv6_print(netdissect_options *ndo, 317 const u_char *cp, u_int length, int indent) 318 { 319 u_int i, t; 320 const u_char *tlv, *value; 321 uint16_t type, optlen; 322 323 i = 0; 324 while (i < length) { 325 if (i + 4 > length) 326 return -1; 327 tlv = cp + i; 328 type = EXTRACT_16BITS(tlv); 329 optlen = EXTRACT_16BITS(tlv + 2); 330 value = tlv + 4; 331 332 ND_PRINT((ndo, "\n")); 333 for (t = indent; t > 0; t--) 334 ND_PRINT((ndo, "\t")); 335 336 ND_PRINT((ndo, "%s", tok2str(dh6opt_str, "Unknown", type))); 337 ND_PRINT((ndo," (%u)", optlen + 4 )); 338 if (i + 4 + optlen > length) 339 return -1; 340 341 switch (type) { 342 case DH6OPT_DNS_SERVERS: 343 case DH6OPT_SNTP_SERVERS: { 344 if (optlen % 16 != 0) { 345 ND_PRINT((ndo, " %s", istr)); 346 return -1; 347 } 348 for (t = 0; t < optlen; t += 16) 349 ND_PRINT((ndo, " %s", ip6addr_string(ndo, value + t))); 350 } 351 break; 352 case DH6OPT_DOMAIN_LIST: { 353 const u_char *tp = value; 354 while (tp < value + optlen) { 355 ND_PRINT((ndo, " ")); 356 if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL) 357 return -1; 358 } 359 } 360 break; 361 } 362 363 i += 4 + optlen; 364 } 365 return 0; 366 } 367 368 /* Determine in-line mode */ 369 static int 370 is_in_line(netdissect_options *ndo, int indent) 371 { 372 return indent - 1 >= ndo->ndo_vflag && ndo->ndo_vflag < 3; 373 } 374 375 static void 376 print_type_in_line(netdissect_options *ndo, 377 uint32_t type, int count, int indent, int *first_one) 378 { 379 if (count > 0) { 380 if (*first_one) { 381 *first_one = 0; 382 if (indent > 1) { 383 u_int t; 384 ND_PRINT((ndo, "\n")); 385 for (t = indent; t > 0; t--) 386 ND_PRINT((ndo, "\t")); 387 } else { 388 ND_PRINT((ndo, " ")); 389 } 390 } else { 391 ND_PRINT((ndo, ", ")); 392 } 393 ND_PRINT((ndo, "%s", tok2str(type_values, "Easter Egg", type))); 394 if (count > 1) 395 ND_PRINT((ndo, " (x%d)", count)); 396 } 397 } 398 399 void 400 hncp_print_rec(netdissect_options *ndo, 401 const u_char *cp, u_int length, int indent) 402 { 403 const int in_line = is_in_line(ndo, indent); 404 int first_one = 1; 405 406 u_int i, t; 407 408 uint32_t last_type_mask = 0xffffffffU; 409 int last_type_count = -1; 410 411 const u_char *tlv, *value; 412 uint16_t type, bodylen; 413 uint32_t type_mask; 414 415 i = 0; 416 while (i < length) { 417 tlv = cp + i; 418 419 if (!in_line) { 420 ND_PRINT((ndo, "\n")); 421 for (t = indent; t > 0; t--) 422 ND_PRINT((ndo, "\t")); 423 } 424 425 ND_TCHECK2(*tlv, 4); 426 if (i + 4 > length) 427 goto invalid; 428 429 type = EXTRACT_16BITS(tlv); 430 bodylen = EXTRACT_16BITS(tlv + 2); 431 value = tlv + 4; 432 ND_TCHECK2(*value, bodylen); 433 if (i + bodylen + 4 > length) 434 goto invalid; 435 436 type_mask = 437 (type == 0) ? RANGE_DNCP_RESERVED: 438 (44 <= type && type <= 511) ? RANGE_HNCP_UNASSIGNED: 439 (768 <= type && type <= 1023) ? RANGE_DNCP_PRIVATE_USE: 440 RANGE_DNCP_FUTURE_USE; 441 if (type == 6 || type == 7) 442 type_mask = RANGE_DNCP_FUTURE_USE; 443 444 /* defined types */ 445 { 446 t = 0; 447 while (1) { 448 u_int key = type_values[t++].v; 449 if (key > 0xffff) 450 break; 451 if (key == type) { 452 type_mask = type; 453 break; 454 } 455 } 456 } 457 458 if (in_line) { 459 if (last_type_mask == type_mask) { 460 last_type_count++; 461 } else { 462 print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one); 463 last_type_mask = type_mask; 464 last_type_count = 1; 465 } 466 467 goto skip_multiline; 468 } 469 470 ND_PRINT((ndo,"%s", tok2str(type_values, "Easter Egg (42)", type_mask) )); 471 if (type_mask > 0xffff) 472 ND_PRINT((ndo,": type=%u", type )); 473 ND_PRINT((ndo," (%u)", bodylen + 4 )); 474 475 switch (type_mask) { 476 477 case DNCP_REQUEST_NETWORK_STATE: { 478 if (bodylen != 0) 479 ND_PRINT((ndo, " %s", istr)); 480 } 481 break; 482 483 case DNCP_REQUEST_NODE_STATE: { 484 const char *node_identifier; 485 if (bodylen != 4) { 486 ND_PRINT((ndo, " %s", istr)); 487 break; 488 } 489 node_identifier = format_nid(value); 490 ND_PRINT((ndo, " NID: %s", node_identifier)); 491 } 492 break; 493 494 case DNCP_NODE_ENDPOINT: { 495 const char *node_identifier; 496 uint32_t endpoint_identifier; 497 if (bodylen != 8) { 498 ND_PRINT((ndo, " %s", istr)); 499 break; 500 } 501 node_identifier = format_nid(value); 502 endpoint_identifier = EXTRACT_32BITS(value + 4); 503 ND_PRINT((ndo, " NID: %s EPID: %08x", 504 node_identifier, 505 endpoint_identifier 506 )); 507 } 508 break; 509 510 case DNCP_NETWORK_STATE: { 511 uint64_t hash; 512 if (bodylen != 8) { 513 ND_PRINT((ndo, " %s", istr)); 514 break; 515 } 516 hash = EXTRACT_64BITS(value); 517 ND_PRINT((ndo, " hash: %016" PRIx64, hash)); 518 } 519 break; 520 521 case DNCP_NODE_STATE: { 522 const char *node_identifier, *interval; 523 uint32_t sequence_number; 524 uint64_t hash; 525 if (bodylen < 20) { 526 ND_PRINT((ndo, " %s", istr)); 527 break; 528 } 529 node_identifier = format_nid(value); 530 sequence_number = EXTRACT_32BITS(value + 4); 531 interval = format_interval(EXTRACT_32BITS(value + 8)); 532 hash = EXTRACT_64BITS(value + 12); 533 ND_PRINT((ndo, " NID: %s seqno: %u %s hash: %016" PRIx64, 534 node_identifier, 535 sequence_number, 536 interval, 537 hash 538 )); 539 hncp_print_rec(ndo, value+20, bodylen-20, indent+1); 540 } 541 break; 542 543 case DNCP_PEER: { 544 const char *peer_node_identifier; 545 uint32_t peer_endpoint_identifier, endpoint_identifier; 546 if (bodylen != 12) { 547 ND_PRINT((ndo, " %s", istr)); 548 break; 549 } 550 peer_node_identifier = format_nid(value); 551 peer_endpoint_identifier = EXTRACT_32BITS(value + 4); 552 endpoint_identifier = EXTRACT_32BITS(value + 8); 553 ND_PRINT((ndo, " Peer-NID: %s Peer-EPID: %08x Local-EPID: %08x", 554 peer_node_identifier, 555 peer_endpoint_identifier, 556 endpoint_identifier 557 )); 558 } 559 break; 560 561 case DNCP_KEEP_ALIVE_INTERVAL: { 562 uint32_t endpoint_identifier; 563 const char *interval; 564 if (bodylen < 8) { 565 ND_PRINT((ndo, " %s", istr)); 566 break; 567 } 568 endpoint_identifier = EXTRACT_32BITS(value); 569 interval = format_interval(EXTRACT_32BITS(value + 4)); 570 ND_PRINT((ndo, " EPID: %08x Interval: %s", 571 endpoint_identifier, 572 interval 573 )); 574 } 575 break; 576 577 case DNCP_TRUST_VERDICT: { 578 if (bodylen <= 36) { 579 ND_PRINT((ndo, " %s", istr)); 580 break; 581 } 582 ND_PRINT((ndo, " Verdict: %u Fingerprint: %s Common Name: ", 583 *value, 584 format_256(value + 4))); 585 safeputs(ndo, value + 36, bodylen - 36); 586 } 587 break; 588 589 case HNCP_HNCP_VERSION: { 590 uint16_t capabilities; 591 uint8_t M, P, H, L; 592 if (bodylen < 5) { 593 ND_PRINT((ndo, " %s", istr)); 594 break; 595 } 596 capabilities = EXTRACT_16BITS(value + 2); 597 M = (uint8_t)((capabilities >> 12) & 0xf); 598 P = (uint8_t)((capabilities >> 8) & 0xf); 599 H = (uint8_t)((capabilities >> 4) & 0xf); 600 L = (uint8_t)(capabilities & 0xf); 601 ND_PRINT((ndo, " M: %u P: %u H: %u L: %u User-agent: ", 602 M, P, H, L 603 )); 604 safeputs(ndo, value + 4, bodylen - 4); 605 } 606 break; 607 608 case HNCP_EXTERNAL_CONNECTION: { 609 /* Container TLV */ 610 hncp_print_rec(ndo, value, bodylen, indent+1); 611 } 612 break; 613 614 case HNCP_DELEGATED_PREFIX: { 615 int l; 616 if (bodylen < 9 || bodylen < 9 + (value[8] + 7) / 8) { 617 ND_PRINT((ndo, " %s", istr)); 618 break; 619 } 620 ND_PRINT((ndo, " VLSO: %s PLSO: %s Prefix: ", 621 format_interval(EXTRACT_32BITS(value)), 622 format_interval(EXTRACT_32BITS(value + 4)) 623 )); 624 l = print_prefix(ndo, value + 8, bodylen - 8); 625 if (l == -1) { 626 ND_PRINT((ndo, "(length is invalid)")); 627 break; 628 } 629 if (l < 0) { 630 /* 631 * We've already checked that we've captured the 632 * entire TLV, based on its length, so this will 633 * either be -1, meaning "the prefix length is 634 * greater than the longest possible address of 635 * that type" (i.e., > 32 for IPv4 or > 128 for 636 * IPv6", or -3, meaning "the prefix runs past 637 * the end of the TLV". 638 */ 639 ND_PRINT((ndo, " %s", istr)); 640 break; 641 } 642 l += 8 + (-l & 3); 643 644 if (bodylen >= l) 645 hncp_print_rec(ndo, value + l, bodylen - l, indent+1); 646 } 647 break; 648 649 case HNCP_PREFIX_POLICY: { 650 uint8_t policy; 651 int l; 652 if (bodylen < 1) { 653 ND_PRINT((ndo, " %s", istr)); 654 break; 655 } 656 policy = value[0]; 657 ND_PRINT((ndo, " type: ")); 658 if (policy == 0) { 659 if (bodylen != 1) { 660 ND_PRINT((ndo, " %s", istr)); 661 break; 662 } 663 ND_PRINT((ndo, "Internet connectivity")); 664 } else if (policy >= 1 && policy <= 128) { 665 ND_PRINT((ndo, "Dest-Prefix: ")); 666 l = print_prefix(ndo, value, bodylen); 667 if (l == -1) { 668 ND_PRINT((ndo, "(length is invalid)")); 669 break; 670 } 671 if (l < 0) { 672 /* 673 * We've already checked that we've captured the 674 * entire TLV, based on its length, so this will 675 * either be -1, meaning "the prefix length is 676 * greater than the longest possible address of 677 * that type" (i.e., > 32 for IPv4 or > 128 for 678 * IPv6", or -3, meaning "the prefix runs past 679 * the end of the TLV". 680 */ 681 ND_PRINT((ndo, " %s", istr)); 682 break; 683 } 684 } else if (policy == 129) { 685 ND_PRINT((ndo, "DNS domain: ")); 686 print_dns_label(ndo, value+1, bodylen-1, 1); 687 } else if (policy == 130) { 688 ND_PRINT((ndo, "Opaque UTF-8: ")); 689 safeputs(ndo, value + 1, bodylen - 1); 690 } else if (policy == 131) { 691 if (bodylen != 1) { 692 ND_PRINT((ndo, " %s", istr)); 693 break; 694 } 695 ND_PRINT((ndo, "Restrictive assignment")); 696 } else if (policy >= 132) { 697 ND_PRINT((ndo, "Unknown (%u)", policy)); /* Reserved for future additions */ 698 } 699 } 700 break; 701 702 case HNCP_DHCPV4_DATA: { 703 if (bodylen == 0) { 704 ND_PRINT((ndo, " %s", istr)); 705 break; 706 } 707 if (dhcpv4_print(ndo, value, bodylen, indent+1) != 0) 708 goto invalid; 709 } 710 break; 711 712 case HNCP_DHCPV6_DATA: { 713 if (bodylen == 0) { 714 ND_PRINT((ndo, " %s", istr)); 715 break; 716 } 717 if (dhcpv6_print(ndo, value, bodylen, indent+1) != 0) { 718 ND_PRINT((ndo, " %s", istr)); 719 break; 720 } 721 } 722 break; 723 724 case HNCP_ASSIGNED_PREFIX: { 725 uint8_t prty; 726 int l; 727 if (bodylen < 6 || bodylen < 6 + (value[5] + 7) / 8) { 728 ND_PRINT((ndo, " %s", istr)); 729 break; 730 } 731 prty = (uint8_t)(value[4] & 0xf); 732 ND_PRINT((ndo, " EPID: %08x Prty: %u", 733 EXTRACT_32BITS(value), 734 prty 735 )); 736 ND_PRINT((ndo, " Prefix: ")); 737 if ((l = print_prefix(ndo, value + 5, bodylen - 5)) < 0) { 738 ND_PRINT((ndo, " %s", istr)); 739 break; 740 } 741 l += 5; 742 l += -l & 3; 743 744 if (bodylen >= l) 745 hncp_print_rec(ndo, value + l, bodylen - l, indent+1); 746 } 747 break; 748 749 case HNCP_NODE_ADDRESS: { 750 uint32_t endpoint_identifier; 751 const char *ip_address; 752 if (bodylen < 20) { 753 ND_PRINT((ndo, " %s", istr)); 754 break; 755 } 756 endpoint_identifier = EXTRACT_32BITS(value); 757 ip_address = format_ip6addr(ndo, value + 4); 758 ND_PRINT((ndo, " EPID: %08x IP Address: %s", 759 endpoint_identifier, 760 ip_address 761 )); 762 763 hncp_print_rec(ndo, value + 20, bodylen - 20, indent+1); 764 } 765 break; 766 767 case HNCP_DNS_DELEGATED_ZONE: { 768 const char *ip_address; 769 int len; 770 if (bodylen < 17) { 771 ND_PRINT((ndo, " %s", istr)); 772 break; 773 } 774 ip_address = format_ip6addr(ndo, value); 775 ND_PRINT((ndo, " IP-Address: %s %c%c%c ", 776 ip_address, 777 (value[16] & 4) ? 'l' : '-', 778 (value[16] & 2) ? 'b' : '-', 779 (value[16] & 1) ? 's' : '-' 780 )); 781 len = print_dns_label(ndo, value+17, bodylen-17, 1); 782 if (len < 0) { 783 ND_PRINT((ndo, " %s", istr)); 784 break; 785 } 786 len += 17; 787 len += -len & 3; 788 if (bodylen >= len) 789 hncp_print_rec(ndo, value+len, bodylen-len, indent+1); 790 } 791 break; 792 793 case HNCP_DOMAIN_NAME: { 794 if (bodylen == 0) { 795 ND_PRINT((ndo, " %s", istr)); 796 break; 797 } 798 ND_PRINT((ndo, " Domain: ")); 799 print_dns_label(ndo, value, bodylen, 1); 800 } 801 break; 802 803 case HNCP_NODE_NAME: { 804 u_int l; 805 if (bodylen < 17) { 806 ND_PRINT((ndo, " %s", istr)); 807 break; 808 } 809 l = value[16]; 810 if (bodylen < 17 + l) { 811 ND_PRINT((ndo, " %s", istr)); 812 break; 813 } 814 ND_PRINT((ndo, " IP-Address: %s Name: ", 815 format_ip6addr(ndo, value) 816 )); 817 if (l < 64) { 818 safeputchar(ndo, '"'); 819 safeputs(ndo, value + 17, l); 820 safeputchar(ndo, '"'); 821 } else { 822 ND_PRINT((ndo, "%s", istr)); 823 } 824 l += 17; 825 l += -l & 3; 826 if (bodylen >= l) 827 hncp_print_rec(ndo, value + l, bodylen - l, indent+1); 828 } 829 break; 830 831 case HNCP_MANAGED_PSK: { 832 if (bodylen < 32) { 833 ND_PRINT((ndo, " %s", istr)); 834 break; 835 } 836 ND_PRINT((ndo, " PSK: %s", format_256(value))); 837 hncp_print_rec(ndo, value + 32, bodylen - 32, indent+1); 838 } 839 break; 840 841 case RANGE_DNCP_RESERVED: 842 case RANGE_HNCP_UNASSIGNED: 843 case RANGE_DNCP_PRIVATE_USE: 844 case RANGE_DNCP_FUTURE_USE: 845 break; 846 847 } 848 skip_multiline: 849 850 i += 4 + bodylen + (-bodylen & 3); 851 } 852 print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one); 853 854 return; 855 856 trunc: 857 ND_PRINT((ndo, "%s", "[|hncp]")); 858 return; 859 860 invalid: 861 ND_PRINT((ndo, "%s", istr)); 862 return; 863 } 864
