| File: | src/usr.sbin/dhcpd/confpars.c |
| Warning: | line 562, column 4 Value stored to 'token' is never read |
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| 1 | /* $OpenBSD: confpars.c,v 1.36 2020/04/23 15:00:27 krw Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1995, 1996, 1997 The Internet Software Consortium. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of The Internet Software Consortium nor the names |
| 17 | * of its contributors may be used to endorse or promote products derived |
| 18 | * from this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND |
| 21 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 22 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 24 | * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR |
| 25 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 28 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 29 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 31 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * This software has been written for the Internet Software Consortium |
| 35 | * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie |
| 36 | * Enterprises. To learn more about the Internet Software Consortium, |
| 37 | * see ``http://www.vix.com/isc''. To learn more about Vixie |
| 38 | * Enterprises, see ``http://www.vix.com''. |
| 39 | */ |
| 40 | |
| 41 | #include <sys/types.h> |
| 42 | #include <sys/socket.h> |
| 43 | |
| 44 | #include <net/if.h> |
| 45 | |
| 46 | #include <limits.h> |
| 47 | #include <netdb.h> |
| 48 | #include <resolv.h> |
| 49 | #include <stdio.h> |
| 50 | #include <stdint.h> |
| 51 | #include <stdlib.h> |
| 52 | #include <string.h> |
| 53 | |
| 54 | #include "dhcp.h" |
| 55 | #include "tree.h" |
| 56 | #include "dhcpd.h" |
| 57 | #include "dhctoken.h" |
| 58 | #include "log.h" |
| 59 | |
| 60 | int parse_cidr(FILE *, unsigned char *, unsigned char *); |
| 61 | |
| 62 | /* |
| 63 | * conf-file :== parameters declarations EOF |
| 64 | * parameters :== <nil> | parameter | parameters parameter |
| 65 | * declarations :== <nil> | declaration | declarations declaration |
| 66 | */ |
| 67 | int |
| 68 | readconf(void) |
| 69 | { |
| 70 | FILE *cfile; |
| 71 | char *val; |
| 72 | int token; |
| 73 | int declaration = 0; |
| 74 | |
| 75 | new_parse(path_dhcpd_conf); |
| 76 | |
| 77 | /* Set up the initial dhcp option universe. */ |
| 78 | initialize_universes(); |
| 79 | |
| 80 | /* Set up the global defaults. */ |
| 81 | root_group.default_lease_time = 43200; /* 12 hours. */ |
| 82 | root_group.max_lease_time = 86400; /* 24 hours. */ |
| 83 | root_group.bootp_lease_cutoff = MAX_TIME0x7fffffff; |
| 84 | root_group.boot_unknown_clients = 1; |
| 85 | root_group.allow_bootp = 1; |
| 86 | root_group.allow_booting = 1; |
| 87 | root_group.authoritative = 1; |
| 88 | root_group.echo_client_id = 1; |
| 89 | |
| 90 | if ((cfile = fopen(path_dhcpd_conf, "r")) == NULL((void *)0)) |
| 91 | fatal("Can't open %s", path_dhcpd_conf); |
| 92 | |
| 93 | do { |
| 94 | token = peek_token(&val, cfile); |
| 95 | if (token == EOF(-1)) |
| 96 | break; |
| 97 | declaration = parse_statement(cfile, &root_group, |
| 98 | ROOT_GROUP0, |
| 99 | NULL((void *)0), |
| 100 | declaration); |
| 101 | } while (1); |
| 102 | token = next_token(&val, cfile); /* Clear the peek buffer */ |
| 103 | fclose(cfile); |
| 104 | |
| 105 | return !warnings_occurred; |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * lease-file :== lease-declarations EOF |
| 110 | * lease-statments :== <nil> |
| 111 | * | lease-declaration |
| 112 | * | lease-declarations lease-declaration |
| 113 | */ |
| 114 | void |
| 115 | read_leases(void) |
| 116 | { |
| 117 | FILE *cfile; |
| 118 | char *val; |
| 119 | int token; |
| 120 | |
| 121 | new_parse(path_dhcpd_db); |
| 122 | |
| 123 | /* |
| 124 | * Open the lease file. If we can't open it, fail. The reason |
| 125 | * for this is that although on initial startup, the absence of |
| 126 | * a lease file is perfectly benign, if dhcpd has been running |
| 127 | * and this file is absent, it means that dhcpd tried and failed |
| 128 | * to rewrite the lease database. If we proceed and the |
| 129 | * problem which caused the rewrite to fail has been fixed, but no |
| 130 | * human has corrected the database problem, then we are left |
| 131 | * thinking that no leases have been assigned to anybody, which |
| 132 | * could create severe network chaos. |
| 133 | */ |
| 134 | if ((cfile = fopen(path_dhcpd_db, "r")) == NULL((void *)0)) { |
| 135 | log_warn("Can't open lease database (%s)", path_dhcpd_db); |
| 136 | log_warnx("check for failed database rewrite attempt!"); |
| 137 | log_warnx("Please read the dhcpd.leases manual page if you"); |
| 138 | fatalx("don't know what to do about this."); |
| 139 | } |
| 140 | |
| 141 | do { |
| 142 | token = next_token(&val, cfile); |
| 143 | if (token == EOF(-1)) |
| 144 | break; |
| 145 | if (token != TOK_LEASE271) { |
| 146 | log_warnx("Corrupt lease file - possible data loss!"); |
| 147 | skip_to_semi(cfile); |
| 148 | } else { |
| 149 | struct lease *lease; |
| 150 | lease = parse_lease_declaration(cfile); |
| 151 | if (lease) |
| 152 | enter_lease(lease); |
| 153 | else |
| 154 | parse_warn("possibly corrupt lease file"); |
| 155 | } |
| 156 | |
| 157 | } while (1); |
| 158 | fclose(cfile); |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * statement :== parameter | declaration |
| 163 | * |
| 164 | * parameter :== timestamp |
| 165 | * | DEFAULT_LEASE_TIME lease_time |
| 166 | * | MAX_LEASE_TIME lease_time |
| 167 | * | DYNAMIC_BOOTP_LEASE_CUTOFF date |
| 168 | * | DYNAMIC_BOOTP_LEASE_LENGTH lease_time |
| 169 | * | BOOT_UNKNOWN_CLIENTS boolean |
| 170 | * | GET_LEASE_HOSTNAMES boolean |
| 171 | * | USE_HOST_DECL_NAME boolean |
| 172 | * | NEXT_SERVER ip-addr-or-hostname SEMI |
| 173 | * | option_parameter |
| 174 | * | SERVER-IDENTIFIER ip-addr-or-hostname SEMI |
| 175 | * | FILENAME string-parameter |
| 176 | * | SERVER_NAME string-parameter |
| 177 | * | hardware-parameter |
| 178 | * | fixed-address-parameter |
| 179 | * | ALLOW allow-deny-keyword |
| 180 | * | DENY allow-deny-keyword |
| 181 | * | USE_LEASE_ADDR_FOR_DEFAULT_ROUTE boolean |
| 182 | * |
| 183 | * declaration :== host-declaration |
| 184 | * | group-declaration |
| 185 | * | shared-network-declaration |
| 186 | * | subnet-declaration |
| 187 | * | VENDOR_CLASS class-declaration |
| 188 | * | USER_CLASS class-declaration |
| 189 | * | RANGE address-range-declaration |
| 190 | */ |
| 191 | int |
| 192 | parse_statement(FILE *cfile, struct group *group, int type, |
| 193 | struct host_decl *host_decl, int declaration) |
| 194 | { |
| 195 | int token; |
| 196 | char *val; |
| 197 | struct shared_network *share; |
| 198 | char *n; |
| 199 | struct tree *tree; |
| 200 | struct tree_cache *cache; |
| 201 | struct hardware hardware; |
| 202 | |
| 203 | switch (next_token(&val, cfile)) { |
| 204 | case TOK_HOST256: |
| 205 | if (type != HOST_DECL1) |
| 206 | parse_host_declaration(cfile, group); |
| 207 | else { |
| 208 | parse_warn("host declarations not allowed here."); |
| 209 | skip_to_semi(cfile); |
| 210 | } |
| 211 | return 1; |
| 212 | |
| 213 | case TOK_GROUP293: |
| 214 | if (type != HOST_DECL1) |
| 215 | parse_group_declaration(cfile, group); |
| 216 | else { |
| 217 | parse_warn("host declarations not allowed here."); |
| 218 | skip_to_semi(cfile); |
| 219 | } |
| 220 | return 1; |
| 221 | |
| 222 | case TOK_TIMESTAMP266: |
| 223 | break; |
| 224 | |
| 225 | case TOK_SHARED_NETWORK284: |
| 226 | if (type == SHARED_NET_DECL2 || |
| 227 | type == HOST_DECL1 || |
| 228 | type == SUBNET_DECL3) { |
| 229 | parse_warn("shared-network parameters not %s.", |
| 230 | "allowed here"); |
| 231 | skip_to_semi(cfile); |
| 232 | break; |
| 233 | } |
| 234 | |
| 235 | parse_shared_net_declaration(cfile, group); |
| 236 | return 1; |
| 237 | |
| 238 | case TOK_SUBNET278: |
| 239 | if (type == HOST_DECL1 || type == SUBNET_DECL3) { |
| 240 | parse_warn("subnet declarations not allowed here."); |
| 241 | skip_to_semi(cfile); |
| 242 | return 1; |
| 243 | } |
| 244 | |
| 245 | /* If we're in a subnet declaration, just do the parse. */ |
| 246 | if (group->shared_network) { |
| 247 | parse_subnet_declaration(cfile, |
| 248 | group->shared_network); |
| 249 | break; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * Otherwise, cons up a fake shared network structure |
| 254 | * and populate it with the lone subnet. |
| 255 | */ |
| 256 | |
| 257 | share = calloc(1, sizeof(struct shared_network)); |
| 258 | if (!share) |
| 259 | fatalx("No memory for shared subnet"); |
| 260 | share->group = clone_group(group, "parse_statement:subnet"); |
| 261 | share->group->shared_network = share; |
| 262 | |
| 263 | parse_subnet_declaration(cfile, share); |
| 264 | |
| 265 | /* share->subnets is the subnet we just parsed. */ |
| 266 | if (share->subnets) { |
| 267 | share->interface = |
| 268 | share->subnets->interface; |
| 269 | |
| 270 | /* Make the shared network name from network number. */ |
| 271 | n = piaddr(share->subnets->net); |
| 272 | share->name = strdup(n); |
| 273 | if (share->name == NULL((void *)0)) |
| 274 | fatalx("no memory for subnet name"); |
| 275 | |
| 276 | /* |
| 277 | * Copy the authoritative parameter from the subnet, |
| 278 | * since there is no opportunity to declare it here. |
| 279 | */ |
| 280 | share->group->authoritative = |
| 281 | share->subnets->group->authoritative; |
| 282 | enter_shared_network(share); |
| 283 | } |
| 284 | return 1; |
| 285 | |
| 286 | case TOK_VENDOR_CLASS282: |
| 287 | parse_class_declaration(cfile, group, 0); |
| 288 | return 1; |
| 289 | |
| 290 | case TOK_USER_CLASS283: |
| 291 | parse_class_declaration(cfile, group, 1); |
| 292 | return 1; |
| 293 | |
| 294 | case TOK_DEFAULT_LEASE_TIME280: |
| 295 | parse_lease_time(cfile, &group->default_lease_time); |
| 296 | break; |
| 297 | |
| 298 | case TOK_MAX_LEASE_TIME281: |
| 299 | parse_lease_time(cfile, &group->max_lease_time); |
| 300 | break; |
| 301 | |
| 302 | case TOK_DYNAMIC_BOOTP_LEASE_CUTOFF288: |
| 303 | group->bootp_lease_cutoff = parse_date(cfile); |
| 304 | break; |
| 305 | |
| 306 | case TOK_DYNAMIC_BOOTP_LEASE_LENGTH289: |
| 307 | parse_lease_time(cfile, &group->bootp_lease_length); |
| 308 | break; |
| 309 | |
| 310 | case TOK_BOOT_UNKNOWN_CLIENTS290: |
| 311 | if (type == HOST_DECL1) |
| 312 | parse_warn("boot-unknown-clients not allowed here."); |
| 313 | group->boot_unknown_clients = parse_boolean(cfile); |
| 314 | break; |
| 315 | |
| 316 | case TOK_GET_LEASE_HOSTNAMES295: |
| 317 | if (type == HOST_DECL1) |
| 318 | parse_warn("get-lease-hostnames not allowed here."); |
| 319 | group->get_lease_hostnames = parse_boolean(cfile); |
| 320 | break; |
| 321 | |
| 322 | case TOK_ALWAYS_REPLY_RFC1048335: |
| 323 | group->always_reply_rfc1048 = parse_boolean(cfile); |
| 324 | break; |
| 325 | |
| 326 | case TOK_ECHO_CLIENT_ID337: |
| 327 | group->echo_client_id = parse_boolean(cfile); |
| 328 | break; |
| 329 | |
| 330 | case TOK_USE_HOST_DECL_NAMES296: |
| 331 | if (type == HOST_DECL1) |
| 332 | parse_warn("use-host-decl-names not allowed here."); |
| 333 | group->use_host_decl_names = parse_boolean(cfile); |
| 334 | break; |
| 335 | |
| 336 | case TOK_USE_LEASE_ADDR_FOR_DEFAULT_ROUTE332: |
| 337 | group->use_lease_addr_for_default_route = |
| 338 | parse_boolean(cfile); |
| 339 | break; |
| 340 | |
| 341 | case TOK_TOKEN_NOT334: |
| 342 | token = next_token(&val, cfile); |
| 343 | switch (token) { |
| 344 | case TOK_AUTHORITATIVE333: |
| 345 | if (type == HOST_DECL1) |
| 346 | parse_warn("authority makes no sense here."); |
| 347 | group->authoritative = 0; |
| 348 | parse_semi(cfile); |
| 349 | break; |
| 350 | default: |
| 351 | parse_warn("expecting assertion"); |
| 352 | skip_to_semi(cfile); |
| 353 | break; |
| 354 | } |
| 355 | break; |
| 356 | |
| 357 | case TOK_AUTHORITATIVE333: |
| 358 | if (type == HOST_DECL1) |
| 359 | parse_warn("authority makes no sense here."); |
| 360 | group->authoritative = 1; |
| 361 | parse_semi(cfile); |
| 362 | break; |
| 363 | |
| 364 | case TOK_NEXT_SERVER291: |
| 365 | tree = parse_ip_addr_or_hostname(cfile, 0); |
| 366 | if (!tree) |
| 367 | break; |
| 368 | cache = tree_cache(tree); |
| 369 | if (!tree_evaluate (cache)) |
| 370 | fatalx("next-server is not known"); |
| 371 | group->next_server.len = 4; |
| 372 | memcpy(group->next_server.iabuf, |
| 373 | cache->value, group->next_server.len); |
| 374 | parse_semi(cfile); |
| 375 | break; |
| 376 | |
| 377 | case TOK_OPTION260: |
| 378 | parse_option_param(cfile, group); |
| 379 | break; |
| 380 | |
| 381 | case TOK_SERVER_IDENTIFIER287: |
| 382 | tree = parse_ip_addr_or_hostname(cfile, 0); |
| 383 | if (!tree) |
| 384 | return declaration; |
| 385 | group->options[DHO_DHCP_SERVER_IDENTIFIER54] = tree_cache(tree); |
| 386 | token = next_token(&val, cfile); |
| 387 | break; |
| 388 | |
| 389 | case TOK_FILENAME258: |
| 390 | group->filename = parse_string(cfile); |
| 391 | break; |
| 392 | |
| 393 | case TOK_SERVER_NAME285: |
| 394 | group->server_name = parse_string(cfile); |
| 395 | break; |
| 396 | |
| 397 | case TOK_HARDWARE257: |
| 398 | parse_hardware_param(cfile, &hardware); |
| 399 | if (host_decl) |
| 400 | host_decl->interface = hardware; |
| 401 | else |
| 402 | parse_warn("hardware address parameter %s", |
| 403 | "not allowed here."); |
| 404 | break; |
| 405 | |
| 406 | case TOK_FIXED_ADDR259: |
| 407 | cache = parse_fixed_addr_param(cfile); |
| 408 | if (host_decl) |
| 409 | host_decl->fixed_addr = cache; |
| 410 | else |
| 411 | parse_warn("fixed-address parameter not %s", |
| 412 | "allowed here."); |
| 413 | break; |
| 414 | |
| 415 | case TOK_RANGE272: |
| 416 | if (type != SUBNET_DECL3 || !group->subnet) { |
| 417 | parse_warn("range declaration not allowed here."); |
| 418 | skip_to_semi(cfile); |
| 419 | return declaration; |
| 420 | } |
| 421 | parse_address_range(cfile, group->subnet); |
| 422 | return declaration; |
| 423 | |
| 424 | case TOK_ALLOW310: |
| 425 | parse_allow_deny(cfile, group, 1); |
| 426 | break; |
| 427 | |
| 428 | case TOK_DENY312: |
| 429 | parse_allow_deny(cfile, group, 0); |
| 430 | break; |
| 431 | |
| 432 | default: |
| 433 | if (declaration) |
| 434 | parse_warn("expecting a declaration."); |
| 435 | else |
| 436 | parse_warn("expecting a parameter or declaration."); |
| 437 | skip_to_semi(cfile); |
| 438 | return declaration; |
| 439 | } |
| 440 | |
| 441 | if (declaration) { |
| 442 | parse_warn("parameters not allowed after first declaration."); |
| 443 | return 1; |
| 444 | } |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * allow-deny-keyword :== BOOTP |
| 451 | * | BOOTING |
| 452 | * | DYNAMIC_BOOTP |
| 453 | * | UNKNOWN_CLIENTS |
| 454 | */ |
| 455 | void |
| 456 | parse_allow_deny(FILE *cfile, struct group *group, int flag) |
| 457 | { |
| 458 | int token; |
| 459 | char *val; |
| 460 | |
| 461 | token = next_token(&val, cfile); |
| 462 | switch (token) { |
| 463 | case TOK_BOOTP311: |
| 464 | group->allow_bootp = flag; |
| 465 | break; |
| 466 | |
| 467 | case TOK_BOOTING313: |
| 468 | group->allow_booting = flag; |
| 469 | break; |
| 470 | |
| 471 | case TOK_DYNAMIC_BOOTP286: |
| 472 | group->dynamic_bootp = flag; |
| 473 | break; |
| 474 | |
| 475 | case TOK_UNKNOWN_CLIENTS309: |
| 476 | group->boot_unknown_clients = flag; |
| 477 | break; |
| 478 | |
| 479 | default: |
| 480 | parse_warn("expecting allow/deny key"); |
| 481 | skip_to_semi(cfile); |
| 482 | return; |
| 483 | } |
| 484 | parse_semi(cfile); |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * boolean :== ON SEMI | OFF SEMI | TRUE SEMI | FALSE SEMI |
| 489 | */ |
| 490 | int |
| 491 | parse_boolean(FILE *cfile) |
| 492 | { |
| 493 | char *val; |
| 494 | int rv; |
| 495 | |
| 496 | next_token(&val, cfile); |
| 497 | if (!strcasecmp (val, "true") || !strcasecmp (val, "on")) |
| 498 | rv = 1; |
| 499 | else if (!strcasecmp (val, "false") || !strcasecmp (val, "off")) |
| 500 | rv = 0; |
| 501 | else { |
| 502 | parse_warn("boolean value (true/false/on/off) expected"); |
| 503 | skip_to_semi(cfile); |
| 504 | return 0; |
| 505 | } |
| 506 | parse_semi(cfile); |
| 507 | return rv; |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * Expect a left brace; if there isn't one, skip over the rest of the |
| 512 | * statement and return zero; otherwise, return 1. |
| 513 | */ |
| 514 | int |
| 515 | parse_lbrace(FILE *cfile) |
| 516 | { |
| 517 | int token; |
| 518 | char *val; |
| 519 | |
| 520 | token = next_token(&val, cfile); |
| 521 | if (token != '{') { |
| 522 | parse_warn("expecting left brace."); |
| 523 | skip_to_semi(cfile); |
| 524 | return 0; |
| 525 | } |
| 526 | return 1; |
| 527 | } |
| 528 | |
| 529 | |
| 530 | /* |
| 531 | * host-declaration :== hostname '{' parameters declarations '}' |
| 532 | */ |
| 533 | void |
| 534 | parse_host_declaration(FILE *cfile, struct group *group) |
| 535 | { |
| 536 | char *val; |
| 537 | int token; |
| 538 | struct host_decl *host; |
| 539 | char *name = parse_host_name(cfile); |
| 540 | int declaration = 0; |
| 541 | |
| 542 | if (!name) |
| 543 | return; |
| 544 | |
| 545 | host = calloc(1, sizeof (struct host_decl)); |
| 546 | if (!host) |
| 547 | fatalx("can't allocate host decl struct %s.", name); |
| 548 | |
| 549 | host->name = name; |
| 550 | host->group = clone_group(group, "parse_host_declaration"); |
| 551 | |
| 552 | if (!parse_lbrace(cfile)) { |
| 553 | free(host->name); |
| 554 | free(host->group); |
| 555 | free(host); |
| 556 | return; |
| 557 | } |
| 558 | |
| 559 | do { |
| 560 | token = peek_token(&val, cfile); |
| 561 | if (token == '}') { |
| 562 | token = next_token(&val, cfile); |
Value stored to 'token' is never read | |
| 563 | break; |
| 564 | } |
| 565 | if (token == EOF(-1)) { |
| 566 | token = next_token(&val, cfile); |
| 567 | parse_warn("unexpected end of file"); |
| 568 | break; |
| 569 | } |
| 570 | declaration = parse_statement(cfile, host->group, |
| 571 | HOST_DECL1, host, declaration); |
| 572 | } while (1); |
| 573 | |
| 574 | if (!host->group->options[DHO_HOST_NAME12] && |
| 575 | host->group->use_host_decl_names) { |
| 576 | host->group->options[DHO_HOST_NAME12] = |
| 577 | new_tree_cache("parse_host_declaration"); |
| 578 | if (!host->group->options[DHO_HOST_NAME12]) |
| 579 | fatalx("can't allocate a tree cache for hostname."); |
| 580 | host->group->options[DHO_HOST_NAME12]->len = |
| 581 | strlen(name); |
| 582 | host->group->options[DHO_HOST_NAME12]->value = |
| 583 | (unsigned char *)name; |
| 584 | host->group->options[DHO_HOST_NAME12]->buf_size = |
| 585 | host->group->options[DHO_HOST_NAME12]->len; |
| 586 | host->group->options[DHO_HOST_NAME12]->timeout = -1; |
| 587 | host->group->options[DHO_HOST_NAME12]->tree = |
| 588 | NULL((void *)0); |
| 589 | } |
| 590 | |
| 591 | enter_host(host); |
| 592 | } |
| 593 | |
| 594 | /* |
| 595 | * class-declaration :== STRING '{' parameters declarations '}' |
| 596 | */ |
| 597 | void |
| 598 | parse_class_declaration(FILE *cfile, struct group *group, int type) |
| 599 | { |
| 600 | char *val; |
| 601 | int token; |
| 602 | struct class *class; |
| 603 | int declaration = 0; |
| 604 | |
| 605 | token = next_token(&val, cfile); |
| 606 | if (token != TOK_STRING262) { |
| 607 | parse_warn("Expecting class name"); |
| 608 | skip_to_semi(cfile); |
| 609 | return; |
| 610 | } |
| 611 | |
| 612 | class = add_class (type, val); |
| 613 | if (!class) |
| 614 | fatalx("No memory for class %s.", val); |
| 615 | class->group = clone_group(group, "parse_class_declaration"); |
| 616 | |
| 617 | if (!parse_lbrace(cfile)) { |
| 618 | free(class->name); |
| 619 | free(class->group); |
| 620 | free(class); |
| 621 | return; |
| 622 | } |
| 623 | |
| 624 | do { |
| 625 | token = peek_token(&val, cfile); |
| 626 | if (token == '}') { |
| 627 | token = next_token(&val, cfile); |
| 628 | break; |
| 629 | } else if (token == EOF(-1)) { |
| 630 | token = next_token(&val, cfile); |
| 631 | parse_warn("unexpected end of file"); |
| 632 | break; |
| 633 | } else { |
| 634 | declaration = parse_statement(cfile, class->group, |
| 635 | CLASS_DECL4, NULL((void *)0), declaration); |
| 636 | } |
| 637 | } while (1); |
| 638 | } |
| 639 | |
| 640 | /* |
| 641 | * shared-network-declaration :== |
| 642 | * hostname LBRACE declarations parameters RBRACE |
| 643 | */ |
| 644 | void |
| 645 | parse_shared_net_declaration(FILE *cfile, struct group *group) |
| 646 | { |
| 647 | char *val; |
| 648 | int token; |
| 649 | struct shared_network *share; |
| 650 | char *name; |
| 651 | int declaration = 0; |
| 652 | |
| 653 | share = calloc(1, sizeof(struct shared_network)); |
| 654 | if (!share) |
| 655 | fatalx("No memory for shared subnet"); |
| 656 | share->leases = NULL((void *)0); |
| 657 | share->last_lease = NULL((void *)0); |
| 658 | share->insertion_point = NULL((void *)0); |
| 659 | share->next = NULL((void *)0); |
| 660 | share->interface = NULL((void *)0); |
| 661 | share->group = clone_group(group, "parse_shared_net_declaration"); |
| 662 | share->group->shared_network = share; |
| 663 | |
| 664 | /* Get the name of the shared network. */ |
| 665 | token = peek_token(&val, cfile); |
| 666 | if (token == TOK_STRING262) { |
| 667 | token = next_token(&val, cfile); |
| 668 | |
| 669 | if (val[0] == 0) { |
| 670 | parse_warn("zero-length shared network name"); |
| 671 | val = "<no-name-given>"; |
| 672 | } |
| 673 | name = strdup(val); |
| 674 | if (name == NULL((void *)0)) |
| 675 | fatalx("no memory for shared network name"); |
| 676 | } else { |
| 677 | name = parse_host_name(cfile); |
| 678 | if (!name) { |
| 679 | free(share->group); |
| 680 | free(share); |
| 681 | return; |
| 682 | } |
| 683 | } |
| 684 | share->name = name; |
| 685 | |
| 686 | if (!parse_lbrace(cfile)) { |
| 687 | free(share->group); |
| 688 | free(share->name); |
| 689 | free(share); |
| 690 | return; |
| 691 | } |
| 692 | |
| 693 | do { |
| 694 | token = peek_token(&val, cfile); |
| 695 | if (token == '}') { |
| 696 | token = next_token(&val, cfile); |
| 697 | if (!share->subnets) { |
| 698 | free(share->group); |
| 699 | free(share->name); |
| 700 | free(share); |
| 701 | parse_warn("empty shared-network decl"); |
| 702 | return; |
| 703 | } |
| 704 | enter_shared_network(share); |
| 705 | return; |
| 706 | } else if (token == EOF(-1)) { |
| 707 | token = next_token(&val, cfile); |
| 708 | parse_warn("unexpected end of file"); |
| 709 | break; |
| 710 | } |
| 711 | |
| 712 | declaration = parse_statement(cfile, share->group, |
| 713 | SHARED_NET_DECL2, NULL((void *)0), declaration); |
| 714 | } while (1); |
| 715 | } |
| 716 | |
| 717 | /* |
| 718 | * subnet-declaration :== |
| 719 | * net NETMASK netmask RBRACE parameters declarations LBRACE |
| 720 | */ |
| 721 | void |
| 722 | parse_subnet_declaration(FILE *cfile, struct shared_network *share) |
| 723 | { |
| 724 | char *val; |
| 725 | int token; |
| 726 | struct subnet *subnet, *t, *u; |
| 727 | struct iaddr iaddr; |
| 728 | unsigned char addr[4]; |
| 729 | int len = sizeof addr; |
| 730 | int declaration = 0; |
| 731 | |
| 732 | subnet = calloc(1, sizeof(struct subnet)); |
| 733 | if (!subnet) |
| 734 | fatalx("No memory for new subnet"); |
| 735 | subnet->shared_network = share; |
| 736 | subnet->group = clone_group(share->group, "parse_subnet_declaration"); |
| 737 | subnet->group->subnet = subnet; |
| 738 | |
| 739 | /* Get the network number. */ |
| 740 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) { |
| 741 | free(subnet->group); |
| 742 | free(subnet); |
| 743 | return; |
| 744 | } |
| 745 | memcpy(iaddr.iabuf, addr, len); |
| 746 | iaddr.len = len; |
| 747 | subnet->net = iaddr; |
| 748 | |
| 749 | token = next_token(&val, cfile); |
| 750 | if (token != TOK_NETMASK279) { |
| 751 | free(subnet->group); |
| 752 | free(subnet); |
| 753 | parse_warn("Expecting netmask"); |
| 754 | skip_to_semi(cfile); |
| 755 | return; |
| 756 | } |
| 757 | |
| 758 | /* Get the netmask. */ |
| 759 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) { |
| 760 | free(subnet->group); |
| 761 | free(subnet); |
| 762 | return; |
| 763 | } |
| 764 | memcpy(iaddr.iabuf, addr, len); |
| 765 | iaddr.len = len; |
| 766 | subnet->netmask = iaddr; |
| 767 | |
| 768 | /* Save only the subnet number. */ |
| 769 | subnet->net = subnet_number(subnet->net, subnet->netmask); |
| 770 | |
| 771 | enter_subnet(subnet); |
| 772 | |
| 773 | if (!parse_lbrace(cfile)) |
| 774 | return; |
| 775 | |
| 776 | do { |
| 777 | token = peek_token(&val, cfile); |
| 778 | if (token == '}') { |
| 779 | token = next_token(&val, cfile); |
| 780 | break; |
| 781 | } else if (token == EOF(-1)) { |
| 782 | token = next_token(&val, cfile); |
| 783 | parse_warn("unexpected end of file"); |
| 784 | break; |
| 785 | } |
| 786 | declaration = parse_statement(cfile, subnet->group, |
| 787 | SUBNET_DECL3, NULL((void *)0), declaration); |
| 788 | } while (1); |
| 789 | |
| 790 | /* |
| 791 | * If this subnet supports dynamic bootp, flag it so in the |
| 792 | * shared_network containing it. |
| 793 | */ |
| 794 | if (subnet->group->dynamic_bootp) |
| 795 | share->group->dynamic_bootp = 1; |
| 796 | |
| 797 | /* Add the subnet to the list of subnets in this shared net. */ |
| 798 | if (!share->subnets) |
| 799 | share->subnets = subnet; |
| 800 | else { |
| 801 | u = NULL((void *)0); |
| 802 | for (t = share->subnets; t; t = t->next_sibling) { |
| 803 | if (subnet_inner_than(subnet, t, 0)) { |
| 804 | if (u) |
| 805 | u->next_sibling = subnet; |
| 806 | else |
| 807 | share->subnets = subnet; |
| 808 | subnet->next_sibling = t; |
| 809 | return; |
| 810 | } |
| 811 | u = t; |
| 812 | } |
| 813 | u->next_sibling = subnet; |
| 814 | } |
| 815 | } |
| 816 | |
| 817 | /* |
| 818 | * group-declaration :== RBRACE parameters declarations LBRACE |
| 819 | */ |
| 820 | void |
| 821 | parse_group_declaration(FILE *cfile, struct group *group) |
| 822 | { |
| 823 | char *val; |
| 824 | int token; |
| 825 | struct group *g; |
| 826 | int declaration = 0; |
| 827 | |
| 828 | g = clone_group(group, "parse_group_declaration"); |
| 829 | |
| 830 | if (!parse_lbrace(cfile)) { |
| 831 | free(g); |
| 832 | return; |
| 833 | } |
| 834 | |
| 835 | do { |
| 836 | token = peek_token(&val, cfile); |
| 837 | if (token == '}') { |
| 838 | token = next_token(&val, cfile); |
| 839 | break; |
| 840 | } else if (token == EOF(-1)) { |
| 841 | token = next_token(&val, cfile); |
| 842 | parse_warn("unexpected end of file"); |
| 843 | break; |
| 844 | } |
| 845 | declaration = parse_statement(cfile, g, GROUP_DECL5, NULL((void *)0), |
| 846 | declaration); |
| 847 | } while (1); |
| 848 | } |
| 849 | |
| 850 | /* |
| 851 | * cidr :== ip-address "/" bit-count |
| 852 | * ip-address :== NUMBER [ DOT NUMBER [ DOT NUMBER [ DOT NUMBER ] ] ] |
| 853 | * bit-count :== 0..32 |
| 854 | */ |
| 855 | int |
| 856 | parse_cidr(FILE *cfile, unsigned char *subnet, unsigned char *subnetlen) |
| 857 | { |
| 858 | uint8_t cidr[5]; |
| 859 | const char *errstr; |
| 860 | char *val; |
| 861 | long long numval; |
| 862 | unsigned int i; |
| 863 | int token; |
| 864 | |
| 865 | memset(cidr, 0, sizeof(cidr)); |
| 866 | i = 1; /* Last four octets hold subnet, first octet the # of bits. */ |
| 867 | do { |
| 868 | token = next_token(&val, cfile); |
| 869 | if (i == 0) |
| 870 | numval = strtonum(val, 0, 32, &errstr); |
| 871 | else |
| 872 | numval = strtonum(val, 0, UINT8_MAX0xff, &errstr); |
| 873 | if (errstr != NULL((void *)0)) |
| 874 | break; |
| 875 | cidr[i++] = numval; |
| 876 | if (i == 1) { |
| 877 | memcpy(subnet, &cidr[1], 4); /* XXX Need cidr_t */ |
| 878 | *subnetlen = cidr[0]; |
| 879 | return 1; |
| 880 | } |
| 881 | token = next_token(NULL((void *)0), cfile); |
| 882 | if (token == '/') |
| 883 | i = 0; |
| 884 | if (i == sizeof(cidr)) |
| 885 | break; |
| 886 | } while (token == '.' || token == '/'); |
| 887 | |
| 888 | parse_warn("expecting IPv4 CIDR block."); |
| 889 | |
| 890 | if (token != ';') |
| 891 | skip_to_semi(cfile); |
| 892 | return 0; |
| 893 | } |
| 894 | |
| 895 | /* |
| 896 | * ip-addr-or-hostname :== ip-address | hostname |
| 897 | * ip-address :== NUMBER DOT NUMBER DOT NUMBER DOT NUMBER |
| 898 | * |
| 899 | * Parse an ip address or a hostname. If uniform is zero, put in |
| 900 | * a TREE_LIMIT node to catch hostnames that evaluate to more than |
| 901 | * one IP address. |
| 902 | */ |
| 903 | struct tree * |
| 904 | parse_ip_addr_or_hostname(FILE *cfile, int uniform) |
| 905 | { |
| 906 | char *val; |
| 907 | int token; |
| 908 | unsigned char addr[4]; |
| 909 | int len = sizeof addr; |
| 910 | char *name; |
| 911 | struct tree *rv; |
| 912 | struct hostent *h; |
| 913 | |
| 914 | name = NULL((void *)0); |
| 915 | h = NULL((void *)0); |
| 916 | |
| 917 | token = peek_token(&val, cfile); |
| 918 | if (is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { |
| 919 | name = parse_host_name(cfile); |
| 920 | if (name) |
| 921 | h = gethostbyname(name); |
| 922 | if (name && h) { |
| 923 | rv = tree_const(h->h_addr_list[0], h->h_length); |
| 924 | if (!uniform) |
| 925 | rv = tree_limit(rv, 4); |
| 926 | return rv; |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | if (token == TOK_NUMBER_OR_NAME264) { |
| 931 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) { |
| 932 | parse_warn("%s (%d): expecting IP address or hostname", |
| 933 | val, token); |
| 934 | return NULL((void *)0); |
| 935 | } |
| 936 | rv = tree_const(addr, len); |
| 937 | } else { |
| 938 | if (token != '{' && token != '}') |
| 939 | token = next_token(&val, cfile); |
| 940 | parse_warn("%s (%d): expecting IP address or hostname", |
| 941 | val, token); |
| 942 | if (token != ';') |
| 943 | skip_to_semi(cfile); |
| 944 | return NULL((void *)0); |
| 945 | } |
| 946 | |
| 947 | return rv; |
| 948 | } |
| 949 | |
| 950 | |
| 951 | /* |
| 952 | * fixed-addr-parameter :== ip-addrs-or-hostnames SEMI |
| 953 | * ip-addrs-or-hostnames :== ip-addr-or-hostname |
| 954 | * | ip-addrs-or-hostnames ip-addr-or-hostname |
| 955 | */ |
| 956 | struct tree_cache * |
| 957 | parse_fixed_addr_param(FILE *cfile) |
| 958 | { |
| 959 | char *val; |
| 960 | int token; |
| 961 | struct tree *tree = NULL((void *)0); |
| 962 | struct tree *tmp; |
| 963 | |
| 964 | do { |
| 965 | tmp = parse_ip_addr_or_hostname(cfile, 0); |
| 966 | if (tree) |
| 967 | tree = tree_concat(tree, tmp); |
| 968 | else |
| 969 | tree = tmp; |
| 970 | token = peek_token(&val, cfile); |
| 971 | if (token == ',') |
| 972 | token = next_token(&val, cfile); |
| 973 | } while (token == ','); |
| 974 | |
| 975 | if (!parse_semi(cfile)) |
| 976 | return NULL((void *)0); |
| 977 | return tree_cache(tree); |
| 978 | } |
| 979 | |
| 980 | /* |
| 981 | * option_parameter :== identifier DOT identifier <syntax> SEMI |
| 982 | * | identifier <syntax> SEMI |
| 983 | * |
| 984 | * Option syntax is handled specially through format strings, so it |
| 985 | * would be painful to come up with BNF for it. However, it always |
| 986 | * starts as above and ends in a SEMI. |
| 987 | */ |
| 988 | void |
| 989 | parse_option_param(FILE *cfile, struct group *group) |
| 990 | { |
| 991 | char *val; |
| 992 | int token; |
| 993 | unsigned char buf[4]; |
| 994 | unsigned char cprefix; |
| 995 | char *vendor; |
| 996 | char *fmt; |
| 997 | struct universe *universe; |
| 998 | struct option *option; |
| 999 | struct tree *tree = NULL((void *)0); |
| 1000 | struct tree *t; |
| 1001 | |
| 1002 | token = next_token(&val, cfile); |
| 1003 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { |
| 1004 | parse_warn("expecting identifier after option keyword."); |
| 1005 | if (token != ';') |
| 1006 | skip_to_semi(cfile); |
| 1007 | return; |
| 1008 | } |
| 1009 | vendor = strdup(val); |
| 1010 | if (vendor == NULL((void *)0)) |
| 1011 | fatalx("no memory for vendor token."); |
| 1012 | token = peek_token(&val, cfile); |
| 1013 | if (token == '.') { |
| 1014 | /* Go ahead and take the DOT token. */ |
| 1015 | token = next_token(&val, cfile); |
| 1016 | |
| 1017 | /* The next token should be an identifier. */ |
| 1018 | token = next_token(&val, cfile); |
| 1019 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { |
| 1020 | parse_warn("expecting identifier after '.'"); |
| 1021 | if (token != ';') |
| 1022 | skip_to_semi(cfile); |
| 1023 | free(vendor); |
| 1024 | return; |
| 1025 | } |
| 1026 | |
| 1027 | /* |
| 1028 | * Look up the option name hash table for the specified |
| 1029 | * vendor. |
| 1030 | */ |
| 1031 | universe = ((struct universe *)hash_lookup(&universe_hash, |
| 1032 | (unsigned char *)vendor, 0)); |
| 1033 | /* |
| 1034 | * If it's not there, we can't parse the rest of the |
| 1035 | * declaration. |
| 1036 | */ |
| 1037 | if (!universe) { |
| 1038 | parse_warn("no vendor named %s.", vendor); |
| 1039 | skip_to_semi(cfile); |
| 1040 | free(vendor); |
| 1041 | return; |
| 1042 | } |
| 1043 | } else { |
| 1044 | /* |
| 1045 | * Use the default hash table, which contains all the |
| 1046 | * standard dhcp option names. |
| 1047 | */ |
| 1048 | val = vendor; |
| 1049 | universe = &dhcp_universe; |
| 1050 | } |
| 1051 | |
| 1052 | /* Look up the actual option info. */ |
| 1053 | option = (struct option *)hash_lookup(universe->hash, |
| 1054 | (unsigned char *)val, 0); |
| 1055 | |
| 1056 | /* If we didn't get an option structure, it's an undefined option. */ |
| 1057 | if (!option) { |
| 1058 | if (val == vendor) |
| 1059 | parse_warn("no option named %s", val); |
| 1060 | else |
| 1061 | parse_warn("no option named %s for vendor %s", |
| 1062 | val, vendor); |
| 1063 | skip_to_semi(cfile); |
| 1064 | free(vendor); |
| 1065 | return; |
| 1066 | } |
| 1067 | |
| 1068 | /* Free the initial identifier token. */ |
| 1069 | free(vendor); |
| 1070 | |
| 1071 | /* Parse the option data. */ |
| 1072 | do { |
| 1073 | /* |
| 1074 | * Set a flag if this is an array of a simple type (i.e., |
| 1075 | * not an array of pairs of IP addresses, or something |
| 1076 | * like that. |
| 1077 | */ |
| 1078 | int uniform = option->format[1] == 'A'; |
| 1079 | |
| 1080 | for (fmt = option->format; *fmt; fmt++) { |
| 1081 | if (*fmt == 'A') |
| 1082 | break; |
| 1083 | switch (*fmt) { |
| 1084 | case 'X': |
| 1085 | token = peek_token(&val, cfile); |
| 1086 | if (token == TOK_NUMBER_OR_NAME264) { |
| 1087 | do { |
| 1088 | token = next_token |
| 1089 | (&val, cfile); |
| 1090 | if (token != |
| 1091 | TOK_NUMBER_OR_NAME264) { |
| 1092 | parse_warn("expecting " |
| 1093 | "hex number."); |
| 1094 | if (token != ';') |
| 1095 | skip_to_semi( |
| 1096 | cfile); |
| 1097 | return; |
| 1098 | } |
| 1099 | convert_num(buf, val, 16, 8); |
| 1100 | tree = tree_concat(tree, |
| 1101 | tree_const(buf, 1)); |
| 1102 | token = peek_token(&val, |
| 1103 | cfile); |
| 1104 | if (token == ':') |
| 1105 | token = |
| 1106 | next_token(&val, |
| 1107 | cfile); |
| 1108 | } while (token == ':'); |
| 1109 | } else if (token == TOK_STRING262) { |
| 1110 | token = next_token(&val, cfile); |
| 1111 | tree = tree_concat(tree, |
| 1112 | tree_const((unsigned char *)val, |
| 1113 | strlen(val))); |
| 1114 | } else { |
| 1115 | parse_warn("expecting string %s.", |
| 1116 | "or hexadecimal data"); |
| 1117 | skip_to_semi(cfile); |
| 1118 | return; |
| 1119 | } |
| 1120 | break; |
| 1121 | |
| 1122 | case 't': /* Text string. */ |
| 1123 | token = next_token(&val, cfile); |
| 1124 | if (token != TOK_STRING262 |
| 1125 | && !is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { |
| 1126 | parse_warn("expecting string."); |
| 1127 | if (token != ';') |
| 1128 | skip_to_semi(cfile); |
| 1129 | return; |
| 1130 | } |
| 1131 | tree = tree_concat(tree, |
| 1132 | tree_const((unsigned char *)val, |
| 1133 | strlen(val))); |
| 1134 | break; |
| 1135 | |
| 1136 | case 'I': /* IP address or hostname. */ |
| 1137 | t = parse_ip_addr_or_hostname(cfile, uniform); |
| 1138 | if (!t) |
| 1139 | return; |
| 1140 | tree = tree_concat(tree, t); |
| 1141 | break; |
| 1142 | |
| 1143 | case 'L': /* Unsigned 32-bit integer. */ |
| 1144 | case 'l': /* Signed 32-bit integer. */ |
| 1145 | token = next_token(&val, cfile); |
| 1146 | if (token != TOK_NUMBER263 && token != |
| 1147 | TOK_NUMBER_OR_NAME264) { |
| 1148 | parse_warn("expecting number."); |
| 1149 | if (token != ';') |
| 1150 | skip_to_semi(cfile); |
| 1151 | return; |
| 1152 | } |
| 1153 | convert_num(buf, val, 0, 32); |
| 1154 | tree = tree_concat(tree, tree_const(buf, 4)); |
| 1155 | break; |
| 1156 | case 's': /* Signed 16-bit integer. */ |
| 1157 | case 'S': /* Unsigned 16-bit integer. */ |
| 1158 | token = next_token(&val, cfile); |
| 1159 | if (token != TOK_NUMBER263 && token != |
| 1160 | TOK_NUMBER_OR_NAME264) { |
| 1161 | parse_warn("expecting number."); |
| 1162 | if (token != ';') |
| 1163 | skip_to_semi(cfile); |
| 1164 | return; |
| 1165 | } |
| 1166 | convert_num(buf, val, 0, 16); |
| 1167 | tree = tree_concat(tree, tree_const(buf, 2)); |
| 1168 | break; |
| 1169 | case 'b': /* Signed 8-bit integer. */ |
| 1170 | case 'B': /* Unsigned 8-bit integer. */ |
| 1171 | token = next_token(&val, cfile); |
| 1172 | if (token != TOK_NUMBER263 && token != |
| 1173 | TOK_NUMBER_OR_NAME264) { |
| 1174 | parse_warn("expecting number."); |
| 1175 | if (token != ';') |
| 1176 | skip_to_semi(cfile); |
| 1177 | return; |
| 1178 | } |
| 1179 | convert_num(buf, val, 0, 8); |
| 1180 | tree = tree_concat(tree, tree_const(buf, 1)); |
| 1181 | break; |
| 1182 | case 'f': /* Boolean flag. */ |
| 1183 | token = next_token(&val, cfile); |
| 1184 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { |
| 1185 | parse_warn("expecting identifier."); |
| 1186 | if (token != ';') |
| 1187 | skip_to_semi(cfile); |
| 1188 | return; |
| 1189 | } |
| 1190 | if (!strcasecmp(val, "true") |
| 1191 | || !strcasecmp(val, "on")) |
| 1192 | buf[0] = 1; |
| 1193 | else if (!strcasecmp(val, "false") |
| 1194 | || !strcasecmp(val, "off")) |
| 1195 | buf[0] = 0; |
| 1196 | else { |
| 1197 | parse_warn("expecting boolean."); |
| 1198 | if (token != ';') |
| 1199 | skip_to_semi(cfile); |
| 1200 | return; |
| 1201 | } |
| 1202 | tree = tree_concat(tree, tree_const(buf, 1)); |
| 1203 | break; |
| 1204 | case 'C': |
| 1205 | if (!parse_cidr(cfile, buf, &cprefix)) |
| 1206 | return; |
| 1207 | tree = tree_concat(tree, tree_const(&cprefix, |
| 1208 | sizeof(cprefix))); |
| 1209 | if (cprefix > 0) |
| 1210 | tree = tree_concat(tree, tree_const( |
| 1211 | buf, (cprefix + 7) / 8)); |
| 1212 | break; |
| 1213 | case 'D': |
| 1214 | t = parse_domain_and_comp(cfile); |
| 1215 | if (!t) |
| 1216 | return; |
| 1217 | tree = tree_concat(tree, t); |
| 1218 | break; |
| 1219 | default: |
| 1220 | log_warnx("Bad format %c in " |
| 1221 | "parse_option_param.", *fmt); |
| 1222 | skip_to_semi(cfile); |
| 1223 | return; |
| 1224 | } |
| 1225 | } |
| 1226 | if (*fmt == 'A') { |
| 1227 | token = peek_token(&val, cfile); |
| 1228 | if (token == ',') { |
| 1229 | token = next_token(&val, cfile); |
| 1230 | continue; |
| 1231 | } |
| 1232 | break; |
| 1233 | } |
| 1234 | } while (*fmt == 'A'); |
| 1235 | |
| 1236 | token = next_token(&val, cfile); |
| 1237 | if (token != ';') { |
| 1238 | parse_warn("semicolon expected."); |
| 1239 | skip_to_semi(cfile); |
| 1240 | return; |
| 1241 | } |
| 1242 | group->options[option->code] = tree_cache(tree); |
| 1243 | } |
| 1244 | |
| 1245 | /* |
| 1246 | * lease_declaration :== LEASE ip_address LBRACE lease_parameters RBRACE |
| 1247 | * |
| 1248 | * lease_parameters :== <nil> |
| 1249 | * | lease_parameter |
| 1250 | * | lease_parameters lease_parameter |
| 1251 | * |
| 1252 | * lease_parameter :== STARTS date |
| 1253 | * | ENDS date |
| 1254 | * | TIMESTAMP date |
| 1255 | * | HARDWARE hardware-parameter |
| 1256 | * | UID hex_numbers SEMI |
| 1257 | * | HOSTNAME hostname SEMI |
| 1258 | * | CLIENT_HOSTNAME hostname SEMI |
| 1259 | * | CLASS identifier SEMI |
| 1260 | * | DYNAMIC_BOOTP SEMI |
| 1261 | */ |
| 1262 | struct lease * |
| 1263 | parse_lease_declaration(FILE *cfile) |
| 1264 | { |
| 1265 | char *val; |
| 1266 | int token; |
| 1267 | unsigned char addr[4]; |
| 1268 | int len = sizeof addr; |
| 1269 | int seenmask = 0; |
| 1270 | int seenbit; |
| 1271 | char tbuf[32]; |
| 1272 | static struct lease lease; |
| 1273 | |
| 1274 | /* Zap the lease structure. */ |
| 1275 | memset(&lease, 0, sizeof lease); |
| 1276 | |
| 1277 | /* Get the address for which the lease has been issued. */ |
| 1278 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) |
| 1279 | return NULL((void *)0); |
| 1280 | memcpy(lease.ip_addr.iabuf, addr, len); |
| 1281 | lease.ip_addr.len = len; |
| 1282 | |
| 1283 | if (!parse_lbrace(cfile)) |
| 1284 | return NULL((void *)0); |
| 1285 | |
| 1286 | do { |
| 1287 | token = next_token(&val, cfile); |
| 1288 | if (token == '}') |
| 1289 | break; |
| 1290 | else if (token == EOF(-1)) { |
| 1291 | parse_warn("unexpected end of file"); |
| 1292 | break; |
| 1293 | } |
| 1294 | strlcpy(tbuf, val, sizeof tbuf); |
| 1295 | |
| 1296 | /* Parse any of the times associated with the lease. */ |
| 1297 | if (token == TOK_STARTS267 || token == TOK_ENDS268 || token == |
| 1298 | TOK_TIMESTAMP266) { |
| 1299 | time_t t; |
| 1300 | t = parse_date(cfile); |
| 1301 | switch (token) { |
| 1302 | case TOK_STARTS267: |
| 1303 | seenbit = 1; |
| 1304 | lease.starts = t; |
| 1305 | break; |
| 1306 | |
| 1307 | case TOK_ENDS268: |
| 1308 | seenbit = 2; |
| 1309 | lease.ends = t; |
| 1310 | break; |
| 1311 | |
| 1312 | case TOK_TIMESTAMP266: |
| 1313 | seenbit = 4; |
| 1314 | lease.timestamp = t; |
| 1315 | break; |
| 1316 | |
| 1317 | default: |
| 1318 | /*NOTREACHED*/ |
| 1319 | seenbit = 0; |
| 1320 | break; |
| 1321 | } |
| 1322 | } else { |
| 1323 | switch (token) { |
| 1324 | /* Colon-separated hexadecimal octets. */ |
| 1325 | case TOK_UID269: |
| 1326 | seenbit = 8; |
| 1327 | token = peek_token(&val, cfile); |
| 1328 | if (token == TOK_STRING262) { |
| 1329 | token = next_token(&val, cfile); |
| 1330 | lease.uid_len = strlen(val); |
| 1331 | lease.uid = malloc(lease.uid_len); |
| 1332 | if (!lease.uid) { |
| 1333 | log_warnx("no space for uid"); |
| 1334 | return NULL((void *)0); |
| 1335 | } |
| 1336 | memcpy(lease.uid, val, lease.uid_len); |
| 1337 | parse_semi(cfile); |
| 1338 | } else { |
| 1339 | lease.uid_len = 0; |
| 1340 | lease.uid = |
| 1341 | parse_numeric_aggregate(cfile, |
| 1342 | NULL((void *)0), &lease.uid_len, ':', 16, 8); |
| 1343 | if (!lease.uid) { |
| 1344 | log_warnx("no space for uid"); |
| 1345 | return NULL((void *)0); |
| 1346 | } |
| 1347 | if (lease.uid_len == 0) { |
| 1348 | lease.uid = NULL((void *)0); |
| 1349 | parse_warn("zero-length uid"); |
| 1350 | seenbit = 0; |
| 1351 | break; |
| 1352 | } |
| 1353 | } |
| 1354 | if (!lease.uid) |
| 1355 | fatalx("No memory for lease uid"); |
| 1356 | break; |
| 1357 | |
| 1358 | case TOK_CLASS270: |
| 1359 | seenbit = 32; |
| 1360 | token = next_token(&val, cfile); |
| 1361 | if (!is_identifier(token)((token) >= 256 && (token) != 262 && (token ) != 263 && (token) != (-1))) { |
| 1362 | if (token != ';') |
| 1363 | skip_to_semi(cfile); |
| 1364 | return NULL((void *)0); |
| 1365 | } |
| 1366 | /* for now, we aren't using this. */ |
| 1367 | break; |
| 1368 | |
| 1369 | case TOK_HARDWARE257: |
| 1370 | seenbit = 64; |
| 1371 | parse_hardware_param(cfile, |
| 1372 | &lease.hardware_addr); |
| 1373 | break; |
| 1374 | |
| 1375 | case TOK_DYNAMIC_BOOTP286: |
| 1376 | seenbit = 128; |
| 1377 | lease.flags |= BOOTP_LEASE2; |
| 1378 | break; |
| 1379 | |
| 1380 | case TOK_ABANDONED319: |
| 1381 | seenbit = 256; |
| 1382 | lease.flags |= ABANDONED_LEASE16; |
| 1383 | break; |
| 1384 | |
| 1385 | case TOK_HOSTNAME328: |
| 1386 | seenbit = 512; |
| 1387 | token = peek_token(&val, cfile); |
| 1388 | if (token == TOK_STRING262) |
| 1389 | lease.hostname = parse_string(cfile); |
| 1390 | else |
| 1391 | lease.hostname = |
| 1392 | parse_host_name(cfile); |
| 1393 | if (!lease.hostname) { |
| 1394 | seenbit = 0; |
| 1395 | return NULL((void *)0); |
| 1396 | } |
| 1397 | break; |
| 1398 | |
| 1399 | case TOK_CLIENT_HOSTNAME329: |
| 1400 | seenbit = 1024; |
| 1401 | token = peek_token(&val, cfile); |
| 1402 | if (token == TOK_STRING262) |
| 1403 | lease.client_hostname = |
| 1404 | parse_string(cfile); |
| 1405 | else |
| 1406 | lease.client_hostname = |
| 1407 | parse_host_name(cfile); |
| 1408 | break; |
| 1409 | |
| 1410 | default: |
| 1411 | skip_to_semi(cfile); |
| 1412 | seenbit = 0; |
| 1413 | return NULL((void *)0); |
| 1414 | } |
| 1415 | |
| 1416 | if (token != TOK_HARDWARE257 && token != TOK_STRING262) { |
| 1417 | token = next_token(&val, cfile); |
| 1418 | if (token != ';') { |
| 1419 | parse_warn("semicolon expected."); |
| 1420 | skip_to_semi(cfile); |
| 1421 | return NULL((void *)0); |
| 1422 | } |
| 1423 | } |
| 1424 | } |
| 1425 | if (seenmask & seenbit) { |
| 1426 | parse_warn("Too many %s parameters in lease %s\n", |
| 1427 | tbuf, piaddr(lease.ip_addr)); |
| 1428 | } else |
| 1429 | seenmask |= seenbit; |
| 1430 | |
| 1431 | } while (1); |
| 1432 | return &lease; |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * address-range-declaration :== ip-address ip-address SEMI |
| 1437 | * | DYNAMIC_BOOTP ip-address ip-address SEMI |
| 1438 | */ |
| 1439 | void |
| 1440 | parse_address_range(FILE *cfile, struct subnet *subnet) |
| 1441 | { |
| 1442 | struct iaddr low, high; |
| 1443 | unsigned char addr[4]; |
| 1444 | int len = sizeof addr, token, dynamic = 0; |
| 1445 | char *val; |
| 1446 | |
| 1447 | if ((token = peek_token(&val, cfile)) == TOK_DYNAMIC_BOOTP286) { |
| 1448 | token = next_token(&val, cfile); |
| 1449 | subnet->group->dynamic_bootp = dynamic = 1; |
| 1450 | } |
| 1451 | |
| 1452 | /* Get the bottom address in the range. */ |
| 1453 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) |
| 1454 | return; |
| 1455 | memcpy(low.iabuf, addr, len); |
| 1456 | low.len = len; |
| 1457 | |
| 1458 | /* Only one address? */ |
| 1459 | token = peek_token(&val, cfile); |
| 1460 | if (token == ';') |
| 1461 | high = low; |
| 1462 | else { |
| 1463 | /* Get the top address in the range. */ |
| 1464 | if (!parse_numeric_aggregate(cfile, addr, &len, '.', 10, 8)) |
| 1465 | return; |
| 1466 | memcpy(high.iabuf, addr, len); |
| 1467 | high.len = len; |
| 1468 | } |
| 1469 | |
| 1470 | token = next_token(&val, cfile); |
| 1471 | if (token != ';') { |
| 1472 | parse_warn("semicolon expected."); |
| 1473 | skip_to_semi(cfile); |
| 1474 | return; |
| 1475 | } |
| 1476 | |
| 1477 | /* Create the new address range. */ |
| 1478 | new_address_range(low, high, subnet, dynamic); |
| 1479 | } |
| 1480 | |
| 1481 | static void |
| 1482 | push_domain_list(char ***domains, size_t *count, char *domain) |
| 1483 | { |
| 1484 | *domains = reallocarray(*domains, *count + 1, sizeof **domains); |
| 1485 | if (!*domains) |
| 1486 | fatalx("Can't allocate domain list"); |
| 1487 | |
| 1488 | (*domains)[*count] = domain; |
| 1489 | ++*count; |
| 1490 | } |
| 1491 | |
| 1492 | static void |
| 1493 | free_domain_list(char **domains, size_t count) |
| 1494 | { |
| 1495 | size_t i; |
| 1496 | |
| 1497 | for (i = 0; i < count; i++) |
| 1498 | free(domains[i]); |
| 1499 | free(domains); |
| 1500 | } |
| 1501 | |
| 1502 | struct tree * |
| 1503 | parse_domain_and_comp(FILE *cfile) |
| 1504 | { |
| 1505 | struct tree *rv = NULL((void *)0); |
| 1506 | char **domains = NULL((void *)0); |
| 1507 | char *val, *domain; |
| 1508 | unsigned char *buf = NULL((void *)0); |
| 1509 | unsigned char **bufptrs = NULL((void *)0); |
| 1510 | size_t bufsiz = 0, bufn = 0, count = 0, i; |
| 1511 | int token = ';'; |
| 1512 | |
| 1513 | do { |
| 1514 | if (token == ',') |
| 1515 | token = next_token(&val, cfile); |
| 1516 | |
| 1517 | token = next_token(&val, cfile); |
| 1518 | if (token != TOK_STRING262) { |
| 1519 | parse_warn("string expected"); |
| 1520 | goto error; |
| 1521 | } |
| 1522 | domain = strdup(val); |
| 1523 | if (domain == NULL((void *)0)) |
| 1524 | fatalx("Can't allocate domain to compress"); |
| 1525 | push_domain_list(&domains, &count, domain); |
| 1526 | |
| 1527 | /* |
| 1528 | * openbsd.org normally compresses to [7]openbsd[3]org[0]. |
| 1529 | * +2 to string length provides space for leading and |
| 1530 | * trailing (root) prefix lengths not already accounted for |
| 1531 | * by dots, and also provides sufficient space for pointer |
| 1532 | * compression. |
| 1533 | */ |
| 1534 | bufsiz = bufsiz + 2 + strlen(domain); |
| 1535 | token = peek_token(NULL((void *)0), cfile); |
| 1536 | } while (token == ','); |
| 1537 | |
| 1538 | buf = malloc(bufsiz); |
| 1539 | if (!buf) |
| 1540 | fatalx("Can't allocate compressed domain buffer"); |
| 1541 | bufptrs = calloc(count + 1, sizeof *bufptrs); |
| 1542 | if (!bufptrs) |
| 1543 | fatalx("Can't allocate compressed pointer list"); |
| 1544 | bufptrs[0] = buf; |
| 1545 | |
| 1546 | /* dn_comp takes an int for the output buffer size */ |
| 1547 | if (!(bufsiz <= INT_MAX2147483647)) |
| 1548 | fatalx("Size of compressed domain buffer too large"); |
| 1549 | for (i = 0; i < count; i++) { |
| 1550 | int n; |
| 1551 | |
| 1552 | /* see bufsiz <= INT_MAX assertion, above */ |
| 1553 | n = dn_comp__dn_comp(domains[i], &buf[bufn], bufsiz - bufn, bufptrs, |
| 1554 | &bufptrs[count + 1]); |
| 1555 | if (n == -1) |
| 1556 | fatalx("Can't compress domain"); |
| 1557 | bufn += (size_t)n; |
| 1558 | } |
| 1559 | |
| 1560 | rv = tree_const(buf, bufn); |
| 1561 | error: |
| 1562 | free_domain_list(domains, count); |
| 1563 | free(buf); |
| 1564 | free(bufptrs); |
| 1565 | return rv; |
| 1566 | } |