1 /*- 2 * Copyright (c) 2011 James Gritton 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/errno.h> 32 #include <sys/socket.h> 33 #include <sys/sysctl.h> 34 35 #include <arpa/inet.h> 36 #include <netinet/in.h> 37 38 #include <err.h> 39 #include <netdb.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "jailp.h" 46 47 struct ipspec { 48 const char *name; 49 unsigned flags; 50 }; 51 52 extern FILE *yyin; 53 extern int yynerrs; 54 55 extern int yyparse(void); 56 57 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 58 59 static void free_param(struct cfparams *pp, struct cfparam *p); 60 static void free_param_strings(struct cfparam *p); 61 62 static const struct ipspec intparams[] = { 63 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL}, 64 [IP_COMMAND] = {"command", PF_INTERNAL}, 65 [IP_DEPEND] = {"depend", PF_INTERNAL}, 66 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL}, 67 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL}, 68 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT}, 69 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL}, 70 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL}, 71 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL}, 72 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL}, 73 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL}, 74 [IP_EXEC_START] = {"exec.start", PF_INTERNAL}, 75 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL}, 76 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user", 77 PF_INTERNAL | PF_BOOL}, 78 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL}, 79 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT}, 80 #if defined(INET) || defined(INET6) 81 [IP_INTERFACE] = {"interface", PF_INTERNAL}, 82 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL}, 83 #endif 84 [IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV}, 85 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL}, 86 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 87 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 88 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 89 #ifdef INET 90 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV}, 91 #endif 92 #ifdef INET6 93 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV}, 94 #endif 95 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV}, 96 [IP__OP] = {NULL, PF_CONV}, 97 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 98 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 99 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 100 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 101 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 102 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 103 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0}, 104 [KP_ENFORCE_STATFS] = {"enforce_statfs", 0}, 105 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 106 #ifdef INET 107 [KP_IP4_ADDR] = {"ip4.addr", 0}, 108 #endif 109 #ifdef INET6 110 [KP_IP6_ADDR] = {"ip6.addr", 0}, 111 #endif 112 [KP_JID] = {"jid", 0}, 113 [KP_NAME] = {"name", 0}, 114 [KP_PATH] = {"path", 0}, 115 [KP_PERSIST] = {"persist", 0}, 116 [KP_SECURELEVEL] = {"securelevel", 0}, 117 [KP_VNET] = {"vnet", 0}, 118 }; 119 120 /* 121 * Parse the jail configuration file. 122 */ 123 void 124 load_config(void) 125 { 126 struct cfjails wild; 127 struct cfparams opp; 128 struct cfjail *j, *tj, *wj; 129 struct cfparam *p, *vp, *tp; 130 struct cfstring *s, *vs, *ns; 131 struct cfvar *v; 132 char *ep; 133 size_t varoff; 134 int did_self, jseq, pgen; 135 136 if (!strcmp(cfname, "-")) { 137 cfname = "STDIN"; 138 yyin = stdin; 139 } else { 140 yyin = fopen(cfname, "r"); 141 if (!yyin) 142 err(1, "%s", cfname); 143 } 144 if (yyparse() || yynerrs) 145 exit(1); 146 147 /* Separate the wildcard jails out from the actual jails. */ 148 jseq = 0; 149 TAILQ_INIT(&wild); 150 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 151 j->seq = ++jseq; 152 if (wild_jail_name(j->name)) 153 requeue(j, &wild); 154 } 155 156 TAILQ_FOREACH(j, &cfjails, tq) { 157 /* Set aside the jail's parameters. */ 158 TAILQ_INIT(&opp); 159 TAILQ_CONCAT(&opp, &j->params, tq); 160 /* 161 * The jail name implies its "name" or "jid" parameter, 162 * though they may also be explicitly set later on. 163 */ 164 add_param(j, NULL, 165 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 166 j->name); 167 /* 168 * Collect parameters for the jail, global parameters/variables, 169 * and any matching wildcard jails. 170 */ 171 did_self = 0; 172 TAILQ_FOREACH(wj, &wild, tq) { 173 if (j->seq < wj->seq && !did_self) { 174 TAILQ_FOREACH(p, &opp, tq) 175 add_param(j, p, 0, NULL); 176 did_self = 1; 177 } 178 if (wild_jail_match(j->name, wj->name)) 179 TAILQ_FOREACH(p, &wj->params, tq) 180 add_param(j, p, 0, NULL); 181 } 182 if (!did_self) 183 TAILQ_FOREACH(p, &opp, tq) 184 add_param(j, p, 0, NULL); 185 186 /* Resolve any variable substitutions. */ 187 pgen = 0; 188 TAILQ_FOREACH(p, &j->params, tq) { 189 p->gen = ++pgen; 190 find_vars: 191 TAILQ_FOREACH(s, &p->val, tq) { 192 varoff = 0; 193 while ((v = STAILQ_FIRST(&s->vars))) { 194 TAILQ_FOREACH(vp, &j->params, tq) 195 if (!strcmp(vp->name, v->name)) 196 break; 197 if (!vp) { 198 jail_warnx(j, 199 "%s: variable \"%s\" not found", 200 p->name, v->name); 201 bad_var: 202 j->flags |= JF_FAILED; 203 TAILQ_FOREACH(vp, &j->params, tq) 204 if (vp->gen == pgen) 205 vp->flags |= PF_BAD; 206 goto free_var; 207 } 208 if (vp->flags & PF_BAD) 209 goto bad_var; 210 if (vp->gen == pgen) { 211 jail_warnx(j, "%s: variable loop", 212 v->name); 213 goto bad_var; 214 } 215 TAILQ_FOREACH(vs, &vp->val, tq) 216 if (!STAILQ_EMPTY(&vs->vars)) { 217 vp->gen = pgen; 218 TAILQ_REMOVE(&j->params, vp, 219 tq); 220 TAILQ_INSERT_BEFORE(p, vp, tq); 221 p = vp; 222 goto find_vars; 223 } 224 vs = TAILQ_FIRST(&vp->val); 225 if (TAILQ_NEXT(vs, tq) != NULL && 226 (s->s[0] != '\0' || 227 STAILQ_NEXT(v, tq))) { 228 jail_warnx(j, "%s: array cannot be " 229 "substituted inline", 230 p->name); 231 goto bad_var; 232 } 233 s->s = erealloc(s->s, s->len + vs->len + 1); 234 memmove(s->s + v->pos + varoff + vs->len, 235 s->s + v->pos + varoff, 236 s->len - (v->pos + varoff) + 1); 237 memcpy(s->s + v->pos + varoff, vs->s, vs->len); 238 varoff += vs->len; 239 s->len += vs->len; 240 while ((vs = TAILQ_NEXT(vs, tq))) { 241 ns = emalloc(sizeof(struct cfstring)); 242 ns->s = estrdup(vs->s); 243 ns->len = vs->len; 244 STAILQ_INIT(&ns->vars); 245 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 246 s = ns; 247 } 248 free_var: 249 free(v->name); 250 STAILQ_REMOVE_HEAD(&s->vars, tq); 251 free(v); 252 } 253 } 254 } 255 256 /* Free the jail's original parameter list and any variables. */ 257 while ((p = TAILQ_FIRST(&opp))) 258 free_param(&opp, p); 259 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 260 if (p->flags & PF_VAR) 261 free_param(&j->params, p); 262 } 263 while ((wj = TAILQ_FIRST(&wild))) { 264 free(wj->name); 265 while ((p = TAILQ_FIRST(&wj->params))) 266 free_param(&wj->params, p); 267 TAILQ_REMOVE(&wild, wj, tq); 268 } 269 } 270 271 /* 272 * Create a new jail record. 273 */ 274 struct cfjail * 275 add_jail(void) 276 { 277 struct cfjail *j; 278 279 j = emalloc(sizeof(struct cfjail)); 280 memset(j, 0, sizeof(struct cfjail)); 281 TAILQ_INIT(&j->params); 282 STAILQ_INIT(&j->dep[DEP_FROM]); 283 STAILQ_INIT(&j->dep[DEP_TO]); 284 j->queue = &cfjails; 285 TAILQ_INSERT_TAIL(&cfjails, j, tq); 286 return j; 287 } 288 289 /* 290 * Add a parameter to a jail. 291 */ 292 void 293 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 294 const char *value) 295 { 296 struct cfstrings nss; 297 struct cfparam *dp, *np; 298 struct cfstring *s, *ns; 299 struct cfvar *v, *nv; 300 const char *name; 301 char *cs, *tname; 302 unsigned flags; 303 304 if (j == NULL) { 305 /* Create a single anonymous jail if one doesn't yet exist. */ 306 j = TAILQ_LAST(&cfjails, cfjails); 307 if (j == NULL) 308 j = add_jail(); 309 } 310 TAILQ_INIT(&nss); 311 if (p != NULL) { 312 name = p->name; 313 flags = p->flags; 314 /* 315 * Make a copy of the parameter's string list, 316 * which may be freed if it's overridden later. 317 */ 318 TAILQ_FOREACH(s, &p->val, tq) { 319 ns = emalloc(sizeof(struct cfstring)); 320 ns->s = estrdup(s->s); 321 ns->len = s->len; 322 STAILQ_INIT(&ns->vars); 323 STAILQ_FOREACH(v, &s->vars, tq) { 324 nv = emalloc(sizeof(struct cfvar)); 325 nv->name = strdup(v->name); 326 nv->pos = v->pos; 327 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 328 } 329 TAILQ_INSERT_TAIL(&nss, ns, tq); 330 } 331 } else { 332 flags = PF_APPEND; 333 if (ipnum != IP__NULL) { 334 name = intparams[ipnum].name; 335 flags |= intparams[ipnum].flags; 336 } else if ((cs = strchr(value, '='))) { 337 tname = alloca(cs - value + 1); 338 strlcpy(tname, value, cs - value + 1); 339 name = tname; 340 value = cs + 1; 341 } else { 342 name = value; 343 value = NULL; 344 } 345 if (value != NULL) { 346 ns = emalloc(sizeof(struct cfstring)); 347 ns->s = estrdup(value); 348 ns->len = strlen(value); 349 STAILQ_INIT(&ns->vars); 350 TAILQ_INSERT_TAIL(&nss, ns, tq); 351 } 352 } 353 354 /* See if this parameter has already been added. */ 355 if (ipnum != IP__NULL) 356 dp = j->intparams[ipnum]; 357 else 358 TAILQ_FOREACH(dp, &j->params, tq) 359 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 360 break; 361 if (dp != NULL) { 362 /* Found it - append or replace. */ 363 if (strcmp(dp->name, name)) { 364 free(dp->name); 365 dp->name = estrdup(name); 366 } 367 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 368 free_param_strings(dp); 369 TAILQ_CONCAT(&dp->val, &nss, tq); 370 dp->flags |= flags; 371 } else { 372 /* Not found - add it. */ 373 np = emalloc(sizeof(struct cfparam)); 374 np->name = estrdup(name); 375 TAILQ_INIT(&np->val); 376 TAILQ_CONCAT(&np->val, &nss, tq); 377 np->flags = flags; 378 np->gen = 0; 379 TAILQ_INSERT_TAIL(&j->params, np, tq); 380 if (ipnum != IP__NULL) 381 j->intparams[ipnum] = np; 382 else 383 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 384 if (!(intparams[ipnum].flags & PF_CONV) && 385 equalopts(name, intparams[ipnum].name)) { 386 j->intparams[ipnum] = np; 387 np->flags |= intparams[ipnum].flags; 388 break; 389 } 390 } 391 } 392 393 /* 394 * Return if a boolean parameter exists and is true. 395 */ 396 int 397 bool_param(const struct cfparam *p) 398 { 399 const char *cs; 400 401 if (p == NULL) 402 return 0; 403 cs = strrchr(p->name, '.'); 404 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 405 (TAILQ_EMPTY(&p->val) || 406 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 407 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 408 } 409 410 /* 411 * Set an integer if a parameter if it exists. 412 */ 413 int 414 int_param(const struct cfparam *p, int *ip) 415 { 416 if (p == NULL || TAILQ_EMPTY(&p->val)) 417 return 0; 418 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 419 return 1; 420 } 421 422 /* 423 * Return the string value of a scalar parameter if it exists. 424 */ 425 const char * 426 string_param(const struct cfparam *p) 427 { 428 return (p && !TAILQ_EMPTY(&p->val) 429 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 430 } 431 432 /* 433 * Check syntax and values of internal parameters. Set some internal 434 * parameters based on the values of others. 435 */ 436 int 437 check_intparams(struct cfjail *j) 438 { 439 struct cfparam *p; 440 struct cfstring *s; 441 FILE *f; 442 const char *val; 443 char *cs, *ep, *ln; 444 size_t lnlen; 445 int error; 446 #if defined(INET) || defined(INET6) 447 struct addrinfo hints; 448 struct addrinfo *ai0, *ai; 449 const char *hostname; 450 int gicode, defif, prefix; 451 #endif 452 #ifdef INET 453 struct in_addr addr4; 454 int ip4ok; 455 char avalue4[INET_ADDRSTRLEN]; 456 #endif 457 #ifdef INET6 458 struct in6_addr addr6; 459 int ip6ok; 460 char avalue6[INET6_ADDRSTRLEN]; 461 #endif 462 463 error = 0; 464 /* Check format of boolan and integer values. */ 465 TAILQ_FOREACH(p, &j->params, tq) { 466 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 467 val = TAILQ_LAST(&p->val, cfstrings)->s; 468 if (p->flags & PF_BOOL) { 469 if (strcasecmp(val, "false") && 470 strcasecmp(val, "true") && 471 ((void)strtol(val, &ep, 10), *ep)) { 472 jail_warnx(j, 473 "%s: unknown boolean value \"%s\"", 474 p->name, val); 475 error = -1; 476 } 477 } else { 478 (void)strtol(val, &ep, 10); 479 if (ep == val || *ep) { 480 jail_warnx(j, 481 "%s: non-integer value \"%s\"", 482 p->name, val); 483 error = -1; 484 } 485 } 486 } 487 } 488 489 #if defined(INET) || defined(INET6) 490 /* 491 * The ip_hostname parameter looks up the hostname, and adds parameters 492 * for any IP addresses it finds. 493 */ 494 if (((j->flags & JF_OP_MASK) != JF_STOP || 495 j->intparams[IP_INTERFACE] != NULL) && 496 bool_param(j->intparams[IP_IP_HOSTNAME]) && 497 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 498 j->intparams[IP_IP_HOSTNAME] = NULL; 499 /* 500 * Silently ignore unsupported address families from 501 * DNS lookups. 502 */ 503 #ifdef INET 504 ip4ok = feature_present("inet"); 505 #endif 506 #ifdef INET6 507 ip6ok = feature_present("inet6"); 508 #endif 509 if ( 510 #if defined(INET) && defined(INET6) 511 ip4ok || ip6ok 512 #elif defined(INET) 513 ip4ok 514 #elif defined(INET6) 515 ip6ok 516 #endif 517 ) { 518 /* Look up the hostname (or get the address) */ 519 memset(&hints, 0, sizeof(hints)); 520 hints.ai_socktype = SOCK_STREAM; 521 hints.ai_family = 522 #if defined(INET) && defined(INET6) 523 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 524 #elif defined(INET) 525 PF_INET; 526 #elif defined(INET6) 527 PF_INET6; 528 #endif 529 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 530 if (gicode != 0) { 531 jail_warnx(j, "host.hostname %s: %s", hostname, 532 gai_strerror(gicode)); 533 error = -1; 534 } else { 535 /* 536 * Convert the addresses to ASCII so jailparam 537 * can convert them back. Errors are not 538 * expected here. 539 */ 540 for (ai = ai0; ai; ai = ai->ai_next) 541 switch (ai->ai_family) { 542 #ifdef INET 543 case AF_INET: 544 memcpy(&addr4, 545 &((struct sockaddr_in *) 546 (void *)ai->ai_addr)-> 547 sin_addr, sizeof(addr4)); 548 if (inet_ntop(AF_INET, 549 &addr4, avalue4, 550 INET_ADDRSTRLEN) == NULL) 551 err(1, "inet_ntop"); 552 add_param(j, NULL, KP_IP4_ADDR, 553 avalue4); 554 break; 555 #endif 556 #ifdef INET6 557 case AF_INET6: 558 memcpy(&addr6, 559 &((struct sockaddr_in6 *) 560 (void *)ai->ai_addr)-> 561 sin6_addr, sizeof(addr6)); 562 if (inet_ntop(AF_INET6, 563 &addr6, avalue6, 564 INET6_ADDRSTRLEN) == NULL) 565 err(1, "inet_ntop"); 566 add_param(j, NULL, KP_IP6_ADDR, 567 avalue6); 568 break; 569 #endif 570 } 571 freeaddrinfo(ai0); 572 } 573 } 574 } 575 576 /* 577 * IP addresses may include an interface to set that address on, 578 * and a netmask/suffix for that address. 579 */ 580 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 581 #ifdef INET 582 if (j->intparams[KP_IP4_ADDR] != NULL) { 583 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 584 cs = strchr(s->s, '|'); 585 if (cs || defif) 586 add_param(j, NULL, IP__IP4_IFADDR, s->s); 587 if (cs) { 588 strcpy(s->s, cs + 1); 589 s->len -= cs + 1 - s->s; 590 } 591 if ((cs = strchr(s->s, '/'))) { 592 prefix = strtol(cs + 1, &ep, 10); 593 if (*ep == '.' 594 ? inet_pton(AF_INET, cs + 1, &addr4) != 1 595 : *ep || prefix < 0 || prefix > 32) { 596 jail_warnx(j, 597 "ip4.addr: bad netmask \"%s\"", cs); 598 error = -1; 599 } 600 *cs = '\0'; 601 s->len = cs - s->s; 602 } 603 } 604 } 605 #endif 606 #ifdef INET6 607 if (j->intparams[KP_IP6_ADDR] != NULL) { 608 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 609 cs = strchr(s->s, '|'); 610 if (cs || defif) 611 add_param(j, NULL, IP__IP6_IFADDR, s->s); 612 if (cs) { 613 strcpy(s->s, cs + 1); 614 s->len -= cs + 1 - s->s; 615 } 616 if ((cs = strchr(s->s, '/'))) { 617 prefix = strtol(cs + 1, &ep, 10); 618 if (*ep || prefix < 0 || prefix > 128) { 619 jail_warnx(j, 620 "ip6.addr: bad prefixlen \"%s\"", 621 cs); 622 error = -1; 623 } 624 *cs = '\0'; 625 s->len = cs - s->s; 626 } 627 } 628 } 629 #endif 630 #endif 631 632 /* 633 * Read mount.fstab file(s), and treat each line as its own mount 634 * parameter. 635 */ 636 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 637 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 638 if (s->len == 0) 639 continue; 640 f = fopen(s->s, "r"); 641 if (f == NULL) { 642 jail_warnx(j, "mount.fstab: %s: %s", 643 s->s, strerror(errno)); 644 error = -1; 645 continue; 646 } 647 while ((ln = fgetln(f, &lnlen))) { 648 if ((cs = memchr(ln, '#', lnlen - 1))) 649 lnlen = cs - ln + 1; 650 if (ln[lnlen - 1] == '\n' || 651 ln[lnlen - 1] == '#') 652 ln[lnlen - 1] = '\0'; 653 else { 654 cs = alloca(lnlen + 1); 655 strlcpy(cs, ln, lnlen + 1); 656 ln = cs; 657 } 658 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 659 } 660 fclose(f); 661 } 662 } 663 if (error) 664 failed(j); 665 return error; 666 } 667 668 /* 669 * Import parameters into libjail's binary jailparam format. 670 */ 671 int 672 import_params(struct cfjail *j) 673 { 674 struct cfparam *p; 675 struct cfstring *s, *ts; 676 struct jailparam *jp; 677 char *value, *cs; 678 size_t vallen; 679 int error; 680 681 error = 0; 682 j->njp = 0; 683 TAILQ_FOREACH(p, &j->params, tq) 684 if (!(p->flags & PF_INTERNAL)) 685 j->njp++; 686 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 687 TAILQ_FOREACH(p, &j->params, tq) { 688 if (p->flags & PF_INTERNAL) 689 continue; 690 if (jailparam_init(jp, p->name) < 0) { 691 error = -1; 692 jail_warnx(j, "%s", jail_errmsg); 693 jp++; 694 continue; 695 } 696 if (TAILQ_EMPTY(&p->val)) 697 value = NULL; 698 else if (!jp->jp_elemlen || 699 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 700 /* 701 * Scalar parameters silently discard multiple (array) 702 * values, keeping only the last value added. This 703 * lets values added from the command line append to 704 * arrays wthout pre-checking the type. 705 */ 706 value = TAILQ_LAST(&p->val, cfstrings)->s; 707 } else { 708 /* 709 * Convert arrays into comma-separated strings, which 710 * jailparam_import will then convert back into arrays. 711 */ 712 vallen = 0; 713 TAILQ_FOREACH(s, &p->val, tq) 714 vallen += s->len + 1; 715 value = alloca(vallen); 716 cs = value; 717 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 718 memcpy(cs, s->s, s->len); 719 cs += s->len + 1; 720 cs[-1] = ','; 721 } 722 value[vallen - 1] = '\0'; 723 } 724 if (jailparam_import(jp, value) < 0) { 725 error = -1; 726 jail_warnx(j, "%s", jail_errmsg); 727 } 728 jp++; 729 } 730 if (error) { 731 jailparam_free(j->jp, j->njp); 732 free(j->jp); 733 j->jp = NULL; 734 failed(j); 735 } 736 return error; 737 } 738 739 /* 740 * Check if options are equal (with or without the "no" prefix). 741 */ 742 int 743 equalopts(const char *opt1, const char *opt2) 744 { 745 char *p; 746 747 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 748 if (strcmp(opt1, opt2) == 0) 749 return (1); 750 /* "noopt" vs. "opt" */ 751 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 752 return (1); 753 /* "opt" vs. "noopt" */ 754 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 755 return (1); 756 while ((p = strchr(opt1, '.')) != NULL && 757 !strncmp(opt1, opt2, ++p - opt1)) { 758 opt2 += p - opt1; 759 opt1 = p; 760 /* "foo.noopt" vs. "foo.opt" */ 761 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 762 return (1); 763 /* "foo.opt" vs. "foo.noopt" */ 764 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 765 return (1); 766 } 767 return (0); 768 } 769 770 /* 771 * See if a jail name matches a wildcard. 772 */ 773 int 774 wild_jail_match(const char *jname, const char *wname) 775 { 776 const char *jc, *jd, *wc, *wd; 777 778 /* 779 * A non-final "*" component in the wild name matches a single jail 780 * component, and a final "*" matches one or more jail components. 781 */ 782 for (jc = jname, wc = wname; 783 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 784 jc = jd + 1, wc = wd + 1) 785 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 786 return 0; 787 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 788 } 789 790 /* 791 * Return if a jail name is a wildcard. 792 */ 793 int 794 wild_jail_name(const char *wname) 795 { 796 const char *wc; 797 798 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 799 if ((wc == wname || wc[-1] == '.') && 800 (wc[1] == '\0' || wc[1] == '.')) 801 return 1; 802 return 0; 803 } 804 805 /* 806 * Free a parameter record and all its strings and variables. 807 */ 808 static void 809 free_param(struct cfparams *pp, struct cfparam *p) 810 { 811 free(p->name); 812 free_param_strings(p); 813 TAILQ_REMOVE(pp, p, tq); 814 free(p); 815 } 816 817 static void 818 free_param_strings(struct cfparam *p) 819 { 820 struct cfstring *s; 821 struct cfvar *v; 822 823 while ((s = TAILQ_FIRST(&p->val))) { 824 free(s->s); 825 while ((v = STAILQ_FIRST(&s->vars))) { 826 free(v->name); 827 STAILQ_REMOVE_HEAD(&s->vars, tq); 828 free(v); 829 } 830 TAILQ_REMOVE(&p->val, s, tq); 831 free(s); 832 } 833 } 834