| 1 | /* $OpenBSD: src/sbin/dhclient/clparse.c,v 1.37 2011/04/04 11:14:52 krw Exp $ */ |
| 2 | |
| 3 | /* Parser for dhclient config and lease files... */ |
| 4 | |
| 5 | /* |
| 6 | * Copyright (c) 1997 The Internet Software Consortium. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of The Internet Software Consortium nor the names |
| 19 | * of its contributors may be used to endorse or promote products derived |
| 20 | * from this software without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND |
| 23 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 24 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 26 | * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR |
| 27 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 28 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 29 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 30 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 31 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 32 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 33 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * This software has been written for the Internet Software Consortium |
| 37 | * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie |
| 38 | * Enterprises. To learn more about the Internet Software Consortium, |
| 39 | * see ``http://www.vix.com/isc''. To learn more about Vixie |
| 40 | * Enterprises, see ``http://www.vix.com''. |
| 41 | */ |
| 42 | |
| 43 | #include "dhcpd.h" |
| 44 | #include "dhctoken.h" |
| 45 | |
| 46 | /* |
| 47 | * client-conf-file :== client-declarations EOF |
| 48 | * client-declarations :== <nil> |
| 49 | * | client-declaration |
| 50 | * | client-declarations client-declaration |
| 51 | */ |
| 52 | int |
| 53 | read_client_conf(void) |
| 54 | { |
| 55 | FILE *cfile; |
| 56 | char *val; |
| 57 | int token; |
| 58 | |
| 59 | new_parse(path_dhclient_conf); |
| 60 | |
| 61 | /* Set some defaults... */ |
| 62 | config->link_timeout = 10; |
| 63 | config->timeout = 60; |
| 64 | config->select_interval = 0; |
| 65 | config->reboot_timeout = 10; |
| 66 | config->retry_interval = 300; |
| 67 | config->backoff_cutoff = 15; |
| 68 | config->initial_interval = 3; |
| 69 | config->bootp_policy = ACCEPT; |
| 70 | config->script_name = _PATH_DHCLIENT_SCRIPT; |
| 71 | config->requested_options |
| 72 | [config->requested_option_count++] = DHO_SUBNET_MASK; |
| 73 | config->requested_options |
| 74 | [config->requested_option_count++] = DHO_BROADCAST_ADDRESS; |
| 75 | config->requested_options |
| 76 | [config->requested_option_count++] = DHO_TIME_OFFSET; |
| 77 | config->requested_options |
| 78 | [config->requested_option_count++] = DHO_ROUTERS; |
| 79 | config->requested_options |
| 80 | [config->requested_option_count++] = DHO_DOMAIN_NAME; |
| 81 | config->requested_options |
| 82 | [config->requested_option_count++] = DHO_DOMAIN_NAME_SERVERS; |
| 83 | config->requested_options |
| 84 | [config->requested_option_count++] = DHO_HOST_NAME; |
| 85 | |
| 86 | if ((cfile = fopen(path_dhclient_conf, "r")) != NULL) { |
| 87 | do { |
| 88 | token = peek_token(&val, cfile); |
| 89 | if (token == EOF) |
| 90 | break; |
| 91 | parse_client_statement(cfile); |
| 92 | } while (1); |
| 93 | token = next_token(&val, cfile); /* Clear the peek buffer */ |
| 94 | fclose(cfile); |
| 95 | } |
| 96 | |
| 97 | return (!warnings_occurred); |
| 98 | } |
| 99 | |
| 100 | /* |
| 101 | * lease-file :== client-lease-statements EOF |
| 102 | * client-lease-statements :== <nil> |
| 103 | * | client-lease-statements LEASE client-lease-statement |
| 104 | */ |
| 105 | void |
| 106 | read_client_leases(void) |
| 107 | { |
| 108 | FILE *cfile; |
| 109 | char *val; |
| 110 | int token; |
| 111 | |
| 112 | new_parse(path_dhclient_db); |
| 113 | |
| 114 | /* Open the lease file. If we can't open it, just return - |
| 115 | we can safely trust the server to remember our state. */ |
| 116 | if ((cfile = fopen(path_dhclient_db, "r")) == NULL) |
| 117 | return; |
| 118 | do { |
| 119 | token = next_token(&val, cfile); |
| 120 | if (token == EOF) |
| 121 | break; |
| 122 | if (token != TOK_LEASE) { |
| 123 | warning("Corrupt lease file - possible data loss!"); |
| 124 | skip_to_semi(cfile); |
| 125 | break; |
| 126 | } else |
| 127 | parse_client_lease_statement(cfile, 0); |
| 128 | |
| 129 | } while (1); |
| 130 | fclose(cfile); |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * client-declaration :== |
| 135 | * TOK_SEND option-decl | |
| 136 | * TOK_DEFAULT option-decl | |
| 137 | * TOK_SUPERSEDE option-decl | |
| 138 | * TOK_APPEND option-decl | |
| 139 | * TOK_PREPEND option-decl | |
| 140 | * TOK_MEDIA string-list | |
| 141 | * hardware-declaration | |
| 142 | * TOK_REQUEST option-list | |
| 143 | * TOK_REQUIRE option-list | |
| 144 | * TOK_TIMEOUT number | |
| 145 | * TOK_RETRY number | |
| 146 | * TOK_SELECT_TIMEOUT number | |
| 147 | * TOK_REBOOT number | |
| 148 | * TOK_BACKOFF_CUTOFF number | |
| 149 | * TOK_INITIAL_INTERVAL number | |
| 150 | * TOK_SCRIPT string | |
| 151 | * interface-declaration | |
| 152 | * TOK_LEASE client-lease-statement | |
| 153 | * TOK_ALIAS client-lease-statement | |
| 154 | * TOK_REJECT reject-statement |
| 155 | */ |
| 156 | void |
| 157 | parse_client_statement(FILE *cfile) |
| 158 | { |
| 159 | char *val; |
| 160 | int token, code; |
| 161 | |
| 162 | switch (next_token(&val, cfile)) { |
| 163 | case TOK_SEND: |
| 164 | parse_option_decl(cfile, &config->send_options[0]); |
| 165 | return; |
| 166 | case TOK_DEFAULT: |
| 167 | code = parse_option_decl(cfile, &config->defaults[0]); |
| 168 | if (code != -1) |
| 169 | config->default_actions[code] = ACTION_DEFAULT; |
| 170 | return; |
| 171 | case TOK_SUPERSEDE: |
| 172 | code = parse_option_decl(cfile, &config->defaults[0]); |
| 173 | if (code != -1) |
| 174 | config->default_actions[code] = ACTION_SUPERSEDE; |
| 175 | return; |
| 176 | case TOK_APPEND: |
| 177 | code = parse_option_decl(cfile, &config->defaults[0]); |
| 178 | if (code != -1) |
| 179 | config->default_actions[code] = ACTION_APPEND; |
| 180 | return; |
| 181 | case TOK_PREPEND: |
| 182 | code = parse_option_decl(cfile, &config->defaults[0]); |
| 183 | if (code != -1) |
| 184 | config->default_actions[code] = ACTION_PREPEND; |
| 185 | return; |
| 186 | case TOK_MEDIA: |
| 187 | skip_to_semi(cfile); |
| 188 | return; |
| 189 | case TOK_HARDWARE: |
| 190 | parse_hardware_param(cfile, &ifi->hw_address); |
| 191 | return; |
| 192 | case TOK_REQUEST: |
| 193 | config->requested_option_count = |
| 194 | parse_option_list(cfile, config->requested_options); |
| 195 | return; |
| 196 | case TOK_REQUIRE: |
| 197 | memset(config->required_options, 0, |
| 198 | sizeof(config->required_options)); |
| 199 | parse_option_list(cfile, config->required_options); |
| 200 | return; |
| 201 | case TOK_LINK_TIMEOUT: |
| 202 | parse_lease_time(cfile, &config->link_timeout); |
| 203 | return; |
| 204 | case TOK_TIMEOUT: |
| 205 | parse_lease_time(cfile, &config->timeout); |
| 206 | return; |
| 207 | case TOK_RETRY: |
| 208 | parse_lease_time(cfile, &config->retry_interval); |
| 209 | return; |
| 210 | case TOK_SELECT_TIMEOUT: |
| 211 | parse_lease_time(cfile, &config->select_interval); |
| 212 | return; |
| 213 | case TOK_REBOOT: |
| 214 | parse_lease_time(cfile, &config->reboot_timeout); |
| 215 | return; |
| 216 | case TOK_BACKOFF_CUTOFF: |
| 217 | parse_lease_time(cfile, &config->backoff_cutoff); |
| 218 | return; |
| 219 | case TOK_INITIAL_INTERVAL: |
| 220 | parse_lease_time(cfile, &config->initial_interval); |
| 221 | return; |
| 222 | case TOK_SCRIPT: |
| 223 | config->script_name = parse_string(cfile); |
| 224 | return; |
| 225 | case TOK_INTERFACE: |
| 226 | parse_interface_declaration(cfile); |
| 227 | return; |
| 228 | case TOK_LEASE: |
| 229 | parse_client_lease_statement(cfile, 1); |
| 230 | return; |
| 231 | case TOK_ALIAS: |
| 232 | skip_to_semi(cfile); |
| 233 | return; |
| 234 | case TOK_REJECT: |
| 235 | parse_reject_statement(cfile); |
| 236 | return; |
| 237 | default: |
| 238 | parse_warn("expecting a statement."); |
| 239 | skip_to_semi(cfile); |
| 240 | break; |
| 241 | } |
| 242 | token = next_token(&val, cfile); |
| 243 | if (token != ';') { |
| 244 | parse_warn("semicolon expected."); |
| 245 | skip_to_semi(cfile); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | int |
| 250 | parse_X(FILE *cfile, u_int8_t *buf, int max) |
| 251 | { |
| 252 | int token; |
| 253 | char *val; |
| 254 | int len; |
| 255 | |
| 256 | token = peek_token(&val, cfile); |
| 257 | if (token == TOK_NUMBER_OR_NAME || token == TOK_NUMBER) { |
| 258 | len = 0; |
| 259 | do { |
| 260 | token = next_token(&val, cfile); |
| 261 | if (token != TOK_NUMBER && token != TOK_NUMBER_OR_NAME) { |
| 262 | parse_warn("expecting hexadecimal constant."); |
| 263 | skip_to_semi(cfile); |
| 264 | return (0); |
| 265 | } |
| 266 | convert_num(&buf[len], val, 16, 8); |
| 267 | if (len++ > max) { |
| 268 | parse_warn("hexadecimal constant too long."); |
| 269 | skip_to_semi(cfile); |
| 270 | return (0); |
| 271 | } |
| 272 | token = peek_token(&val, cfile); |
| 273 | if (token == ':') |
| 274 | token = next_token(&val, cfile); |
| 275 | } while (token == ':'); |
| 276 | val = (char *)buf; |
| 277 | } else if (token == TOK_STRING) { |
| 278 | token = next_token(&val, cfile); |
| 279 | len = strlen(val); |
| 280 | if (len + 1 > max) { |
| 281 | parse_warn("string constant too long."); |
| 282 | skip_to_semi(cfile); |
| 283 | return (0); |
| 284 | } |
| 285 | memcpy(buf, val, len + 1); |
| 286 | } else { |
| 287 | parse_warn("expecting string or hexadecimal data"); |
| 288 | skip_to_semi(cfile); |
| 289 | return (0); |
| 290 | } |
| 291 | return (len); |
| 292 | } |
| 293 | |
| 294 | /* |
| 295 | * option-list :== option_name | |
| 296 | * option_list COMMA option_name |
| 297 | */ |
| 298 | int |
| 299 | parse_option_list(FILE *cfile, u_int8_t *list) |
| 300 | { |
| 301 | int ix, i; |
| 302 | int token; |
| 303 | char *val; |
| 304 | |
| 305 | ix = 0; |
| 306 | do { |
| 307 | token = next_token(&val, cfile); |
| 308 | if (!is_identifier(token)) { |
| 309 | parse_warn("expected option name."); |
| 310 | skip_to_semi(cfile); |
| 311 | return (0); |
| 312 | } |
| 313 | for (i = 0; i < 256; i++) |
| 314 | if (!strcasecmp(dhcp_options[i].name, val)) |
| 315 | break; |
| 316 | |
| 317 | if (i == 256) { |
| 318 | parse_warn("%s: unexpected option name.", val); |
| 319 | skip_to_semi(cfile); |
| 320 | return (0); |
| 321 | } |
| 322 | list[ix++] = i; |
| 323 | if (ix == 256) { |
| 324 | parse_warn("%s: too many options.", val); |
| 325 | skip_to_semi(cfile); |
| 326 | return (0); |
| 327 | } |
| 328 | token = next_token(&val, cfile); |
| 329 | } while (token == ','); |
| 330 | if (token != ';') { |
| 331 | parse_warn("expecting semicolon."); |
| 332 | skip_to_semi(cfile); |
| 333 | return (0); |
| 334 | } |
| 335 | return (ix); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * interface-declaration :== |
| 340 | * INTERFACE string LBRACE client-declarations RBRACE |
| 341 | */ |
| 342 | void |
| 343 | parse_interface_declaration(FILE *cfile) |
| 344 | { |
| 345 | char *val; |
| 346 | int token; |
| 347 | |
| 348 | token = next_token(&val, cfile); |
| 349 | if (token != TOK_STRING) { |
| 350 | parse_warn("expecting interface name (in quotes)."); |
| 351 | skip_to_semi(cfile); |
| 352 | return; |
| 353 | } |
| 354 | |
| 355 | if (strcmp(ifi->name, val) != 0) { |
| 356 | skip_to_semi(cfile); |
| 357 | return; |
| 358 | } |
| 359 | |
| 360 | token = next_token(&val, cfile); |
| 361 | if (token != '{') { |
| 362 | parse_warn("expecting left brace."); |
| 363 | skip_to_semi(cfile); |
| 364 | return; |
| 365 | } |
| 366 | |
| 367 | do { |
| 368 | token = peek_token(&val, cfile); |
| 369 | if (token == EOF) { |
| 370 | parse_warn("unterminated interface declaration."); |
| 371 | return; |
| 372 | } |
| 373 | if (token == '}') |
| 374 | break; |
| 375 | parse_client_statement(cfile); |
| 376 | } while (1); |
| 377 | token = next_token(&val, cfile); |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * client-lease-statement :== |
| 382 | * RBRACE client-lease-declarations LBRACE |
| 383 | * |
| 384 | * client-lease-declarations :== |
| 385 | * <nil> | |
| 386 | * client-lease-declaration | |
| 387 | * client-lease-declarations client-lease-declaration |
| 388 | */ |
| 389 | void |
| 390 | parse_client_lease_statement(FILE *cfile, int is_static) |
| 391 | { |
| 392 | struct client_lease *lease, *lp, *pl; |
| 393 | int token; |
| 394 | char *val; |
| 395 | |
| 396 | token = next_token(&val, cfile); |
| 397 | if (token != '{') { |
| 398 | parse_warn("expecting left brace."); |
| 399 | skip_to_semi(cfile); |
| 400 | return; |
| 401 | } |
| 402 | |
| 403 | lease = malloc(sizeof(struct client_lease)); |
| 404 | if (!lease) |
| 405 | error("no memory for lease."); |
| 406 | memset(lease, 0, sizeof(*lease)); |
| 407 | lease->is_static = is_static; |
| 408 | |
| 409 | do { |
| 410 | token = peek_token(&val, cfile); |
| 411 | if (token == EOF) { |
| 412 | parse_warn("unterminated lease declaration."); |
| 413 | return; |
| 414 | } |
| 415 | if (token == '}') |
| 416 | break; |
| 417 | parse_client_lease_declaration(cfile, lease); |
| 418 | } while (1); |
| 419 | token = next_token(&val, cfile); |
| 420 | |
| 421 | /* If the lease declaration didn't include an interface |
| 422 | * declaration that we recognized, it's of no use to us. |
| 423 | */ |
| 424 | if (!ifi) { |
| 425 | free_client_lease(lease); |
| 426 | return; |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * The new lease may supersede a lease that's not the active |
| 431 | * lease but is still on the lease list, so scan the lease list |
| 432 | * looking for a lease with the same address, and if we find it, |
| 433 | * toss it. |
| 434 | */ |
| 435 | pl = NULL; |
| 436 | for (lp = client->leases; lp; lp = lp->next) { |
| 437 | if (addr_eq(lp->address, lease->address)) { |
| 438 | if (pl) |
| 439 | pl->next = lp->next; |
| 440 | else |
| 441 | client->leases = lp->next; |
| 442 | free_client_lease(lp); |
| 443 | break; |
| 444 | } else |
| 445 | pl = lp; |
| 446 | } |
| 447 | |
| 448 | /* |
| 449 | * If this is a preloaded lease, just put it on the list of |
| 450 | * recorded leases - don't make it the active lease. |
| 451 | */ |
| 452 | if (is_static) { |
| 453 | lease->next = client->leases; |
| 454 | client->leases = lease; |
| 455 | return; |
| 456 | } |
| 457 | |
| 458 | /* |
| 459 | * The last lease in the lease file on a particular interface is |
| 460 | * the active lease for that interface. Of course, we don't |
| 461 | * know what the last lease in the file is until we've parsed |
| 462 | * the whole file, so at this point, we assume that the lease we |
| 463 | * just parsed is the active lease for its interface. If |
| 464 | * there's already an active lease for the interface, and this |
| 465 | * lease is for the same ip address, then we just toss the old |
| 466 | * active lease and replace it with this one. If this lease is |
| 467 | * for a different address, then if the old active lease has |
| 468 | * expired, we dump it; if not, we put it on the list of leases |
| 469 | * for this interface which are still valid but no longer |
| 470 | * active. |
| 471 | */ |
| 472 | if (client->active) { |
| 473 | if (client->active->expiry < cur_time) |
| 474 | free_client_lease(client->active); |
| 475 | else if (addr_eq(client->active->address, lease->address)) |
| 476 | free_client_lease(client->active); |
| 477 | else { |
| 478 | client->active->next = client->leases; |
| 479 | client->leases = client->active; |
| 480 | } |
| 481 | } |
| 482 | client->active = lease; |
| 483 | |
| 484 | /* Phew. */ |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * client-lease-declaration :== |
| 489 | * BOOTP | |
| 490 | * INTERFACE string | |
| 491 | * FIXED_ADDR ip_address | |
| 492 | * FILENAME string | |
| 493 | * SERVER_NAME string | |
| 494 | * OPTION option-decl | |
| 495 | * RENEW time-decl | |
| 496 | * REBIND time-decl | |
| 497 | * EXPIRE time-decl |
| 498 | */ |
| 499 | void |
| 500 | parse_client_lease_declaration(FILE *cfile, struct client_lease *lease) |
| 501 | { |
| 502 | char *val; |
| 503 | int token; |
| 504 | |
| 505 | switch (next_token(&val, cfile)) { |
| 506 | case TOK_BOOTP: |
| 507 | lease->is_bootp = 1; |
| 508 | break; |
| 509 | case TOK_INTERFACE: |
| 510 | token = next_token(&val, cfile); |
| 511 | if (token != TOK_STRING) { |
| 512 | parse_warn("expecting interface name (in quotes)."); |
| 513 | skip_to_semi(cfile); |
| 514 | break; |
| 515 | } |
| 516 | if (strcmp(ifi->name, val) != 0) { |
| 517 | parse_warn("wrong interface name. Expecting '%s'.", |
| 518 | ifi->name); |
| 519 | skip_to_semi(cfile); |
| 520 | break; |
| 521 | } |
| 522 | break; |
| 523 | case TOK_FIXED_ADDR: |
| 524 | if (!parse_ip_addr(cfile, &lease->address)) |
| 525 | return; |
| 526 | break; |
| 527 | case TOK_MEDIUM: |
| 528 | skip_to_semi(cfile); |
| 529 | return; |
| 530 | case TOK_FILENAME: |
| 531 | lease->filename = parse_string(cfile); |
| 532 | return; |
| 533 | case TOK_SERVER_NAME: |
| 534 | lease->server_name = parse_string(cfile); |
| 535 | return; |
| 536 | case TOK_RENEW: |
| 537 | lease->renewal = parse_date(cfile); |
| 538 | return; |
| 539 | case TOK_REBIND: |
| 540 | lease->rebind = parse_date(cfile); |
| 541 | return; |
| 542 | case TOK_EXPIRE: |
| 543 | lease->expiry = parse_date(cfile); |
| 544 | return; |
| 545 | case TOK_OPTION: |
| 546 | parse_option_decl(cfile, lease->options); |
| 547 | return; |
| 548 | default: |
| 549 | parse_warn("expecting lease declaration."); |
| 550 | skip_to_semi(cfile); |
| 551 | break; |
| 552 | } |
| 553 | token = next_token(&val, cfile); |
| 554 | if (token != ';') { |
| 555 | parse_warn("expecting semicolon."); |
| 556 | skip_to_semi(cfile); |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | int |
| 561 | parse_option_decl(FILE *cfile, struct option_data *options) |
| 562 | { |
| 563 | char *val; |
| 564 | int token; |
| 565 | u_int8_t buf[4]; |
| 566 | u_int8_t hunkbuf[1024]; |
| 567 | int hunkix = 0; |
| 568 | char *fmt; |
| 569 | struct iaddr ip_addr; |
| 570 | u_int8_t *dp; |
| 571 | int len, code; |
| 572 | int nul_term = 0; |
| 573 | |
| 574 | token = next_token(&val, cfile); |
| 575 | if (!is_identifier(token)) { |
| 576 | parse_warn("expecting identifier after option keyword."); |
| 577 | if (token != ';') |
| 578 | skip_to_semi(cfile); |
| 579 | return (-1); |
| 580 | } |
| 581 | |
| 582 | /* Look up the actual option info. */ |
| 583 | fmt = NULL; |
| 584 | for (code = 0; code < 256; code++) |
| 585 | if (strcmp(dhcp_options[code].name, val) == 0) |
| 586 | break; |
| 587 | |
| 588 | if (code > 255) { |
| 589 | parse_warn("no option named %s", val); |
| 590 | skip_to_semi(cfile); |
| 591 | return (-1); |
| 592 | } |
| 593 | |
| 594 | /* Parse the option data... */ |
| 595 | do { |
| 596 | for (fmt = dhcp_options[code].format; *fmt; fmt++) { |
| 597 | if (*fmt == 'A') |
| 598 | break; |
| 599 | switch (*fmt) { |
| 600 | case 'X': |
| 601 | len = parse_X(cfile, &hunkbuf[hunkix], |
| 602 | sizeof(hunkbuf) - hunkix); |
| 603 | hunkix += len; |
| 604 | break; |
| 605 | case 't': /* Text string... */ |
| 606 | token = next_token(&val, cfile); |
| 607 | if (token != TOK_STRING) { |
| 608 | parse_warn("expecting string."); |
| 609 | skip_to_semi(cfile); |
| 610 | return (-1); |
| 611 | } |
| 612 | len = strlen(val); |
| 613 | if (hunkix + len + 1 > sizeof(hunkbuf)) { |
| 614 | parse_warn("option data buffer %s", |
| 615 | "overflow"); |
| 616 | skip_to_semi(cfile); |
| 617 | return (-1); |
| 618 | } |
| 619 | memcpy(&hunkbuf[hunkix], val, len + 1); |
| 620 | nul_term = 1; |
| 621 | hunkix += len; |
| 622 | break; |
| 623 | case 'I': /* IP address. */ |
| 624 | if (!parse_ip_addr(cfile, &ip_addr)) |
| 625 | return (-1); |
| 626 | len = ip_addr.len; |
| 627 | dp = ip_addr.iabuf; |
| 628 | alloc: |
| 629 | if (hunkix + len > sizeof(hunkbuf)) { |
| 630 | parse_warn("option data buffer " |
| 631 | "overflow"); |
| 632 | skip_to_semi(cfile); |
| 633 | return (-1); |
| 634 | } |
| 635 | memcpy(&hunkbuf[hunkix], dp, len); |
| 636 | hunkix += len; |
| 637 | break; |
| 638 | case 'L': /* Unsigned 32-bit integer... */ |
| 639 | case 'l': /* Signed 32-bit integer... */ |
| 640 | token = next_token(&val, cfile); |
| 641 | if (token != TOK_NUMBER) { |
| 642 | need_number: |
| 643 | parse_warn("expecting number."); |
| 644 | if (token != ';') |
| 645 | skip_to_semi(cfile); |
| 646 | return (-1); |
| 647 | } |
| 648 | convert_num(buf, val, 0, 32); |
| 649 | len = 4; |
| 650 | dp = buf; |
| 651 | goto alloc; |
| 652 | case 's': /* Signed 16-bit integer. */ |
| 653 | case 'S': /* Unsigned 16-bit integer. */ |
| 654 | token = next_token(&val, cfile); |
| 655 | if (token != TOK_NUMBER) |
| 656 | goto need_number; |
| 657 | convert_num(buf, val, 0, 16); |
| 658 | len = 2; |
| 659 | dp = buf; |
| 660 | goto alloc; |
| 661 | case 'b': /* Signed 8-bit integer. */ |
| 662 | case 'B': /* Unsigned 8-bit integer. */ |
| 663 | token = next_token(&val, cfile); |
| 664 | if (token != TOK_NUMBER) |
| 665 | goto need_number; |
| 666 | convert_num(buf, val, 0, 8); |
| 667 | len = 1; |
| 668 | dp = buf; |
| 669 | goto alloc; |
| 670 | case 'f': /* Boolean flag. */ |
| 671 | token = next_token(&val, cfile); |
| 672 | if (!is_identifier(token)) { |
| 673 | parse_warn("expecting identifier."); |
| 674 | bad_flag: |
| 675 | if (token != ';') |
| 676 | skip_to_semi(cfile); |
| 677 | return (-1); |
| 678 | } |
| 679 | if (!strcasecmp(val, "true") || |
| 680 | !strcasecmp(val, "on")) |
| 681 | buf[0] = 1; |
| 682 | else if (!strcasecmp(val, "false") || |
| 683 | !strcasecmp(val, "off")) |
| 684 | buf[0] = 0; |
| 685 | else { |
| 686 | parse_warn("expecting boolean."); |
| 687 | goto bad_flag; |
| 688 | } |
| 689 | len = 1; |
| 690 | dp = buf; |
| 691 | goto alloc; |
| 692 | default: |
| 693 | warning("Bad format %c in parse_option_param.", |
| 694 | *fmt); |
| 695 | skip_to_semi(cfile); |
| 696 | return (-1); |
| 697 | } |
| 698 | } |
| 699 | token = next_token(&val, cfile); |
| 700 | } while (*fmt == 'A' && token == ','); |
| 701 | |
| 702 | if (token != ';') { |
| 703 | parse_warn("semicolon expected."); |
| 704 | skip_to_semi(cfile); |
| 705 | return (-1); |
| 706 | } |
| 707 | |
| 708 | options[code].data = malloc(hunkix + nul_term); |
| 709 | if (!options[code].data) |
| 710 | error("out of memory allocating option data."); |
| 711 | memcpy(options[code].data, hunkbuf, hunkix + nul_term); |
| 712 | options[code].len = hunkix; |
| 713 | return (code); |
| 714 | } |
| 715 | |
| 716 | void |
| 717 | parse_reject_statement(FILE *cfile) |
| 718 | { |
| 719 | struct iaddrlist *list; |
| 720 | struct iaddr addr; |
| 721 | char *val; |
| 722 | int token; |
| 723 | |
| 724 | do { |
| 725 | if (!parse_ip_addr(cfile, &addr)) { |
| 726 | parse_warn("expecting IP address."); |
| 727 | skip_to_semi(cfile); |
| 728 | return; |
| 729 | } |
| 730 | |
| 731 | list = malloc(sizeof(struct iaddrlist)); |
| 732 | if (!list) |
| 733 | error("no memory for reject list!"); |
| 734 | |
| 735 | list->addr = addr; |
| 736 | list->next = config->reject_list; |
| 737 | config->reject_list = list; |
| 738 | |
| 739 | token = next_token(&val, cfile); |
| 740 | } while (token == ','); |
| 741 | |
| 742 | if (token != ';') { |
| 743 | parse_warn("expecting semicolon."); |
| 744 | skip_to_semi(cfile); |
| 745 | } |
| 746 | } |