1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 James Gritton 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 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <sys/errno.h> 34 #include <sys/socket.h> 35 #include <sys/sysctl.h> 36 37 #include <arpa/inet.h> 38 #include <netinet/in.h> 39 40 #include <err.h> 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "jailp.h" 48 49 struct ipspec { 50 const char *name; 51 unsigned flags; 52 }; 53 54 extern FILE *yyin; 55 extern int yynerrs; 56 57 extern int yyparse(void); 58 59 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 60 61 static void free_param(struct cfparams *pp, struct cfparam *p); 62 static void free_param_strings(struct cfparam *p); 63 64 static const struct ipspec intparams[] = { 65 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL}, 66 [IP_COMMAND] = {"command", PF_INTERNAL}, 67 [IP_DEPEND] = {"depend", PF_INTERNAL}, 68 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL}, 69 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL}, 70 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT}, 71 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL}, 72 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL}, 73 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL}, 74 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL}, 75 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL}, 76 [IP_EXEC_CREATED] = {"exec.created", PF_INTERNAL}, 77 [IP_EXEC_START] = {"exec.start", PF_INTERNAL}, 78 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL}, 79 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user", 80 PF_INTERNAL | PF_BOOL}, 81 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL}, 82 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT}, 83 #if defined(INET) || defined(INET6) 84 [IP_INTERFACE] = {"interface", PF_INTERNAL}, 85 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL}, 86 #endif 87 [IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV}, 88 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL}, 89 [IP_MOUNT_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL}, 90 [IP_MOUNT_PROCFS] = {"mount.procfs", PF_INTERNAL | PF_BOOL}, 91 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 92 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 93 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 94 #ifdef INET 95 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV}, 96 #endif 97 #ifdef INET6 98 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV}, 99 #endif 100 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV}, 101 [IP__OP] = {NULL, PF_CONV}, 102 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 103 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 104 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 105 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 106 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 107 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 108 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0}, 109 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 110 #ifdef INET 111 [KP_IP4_ADDR] = {"ip4.addr", 0}, 112 #endif 113 #ifdef INET6 114 [KP_IP6_ADDR] = {"ip6.addr", 0}, 115 #endif 116 [KP_JID] = {"jid", PF_IMMUTABLE}, 117 [KP_NAME] = {"name", PF_IMMUTABLE}, 118 [KP_PATH] = {"path", 0}, 119 [KP_PERSIST] = {"persist", 0}, 120 [KP_SECURELEVEL] = {"securelevel", 0}, 121 [KP_VNET] = {"vnet", 0}, 122 }; 123 124 /* 125 * Parse the jail configuration file. 126 */ 127 void 128 load_config(void) 129 { 130 struct cfjails wild; 131 struct cfparams opp; 132 struct cfjail *j, *tj, *wj; 133 struct cfparam *p, *vp, *tp; 134 struct cfstring *s, *vs, *ns; 135 struct cfvar *v, *vv; 136 char *ep; 137 int did_self, jseq, pgen; 138 139 if (!strcmp(cfname, "-")) { 140 cfname = "STDIN"; 141 yyin = stdin; 142 } else { 143 yyin = fopen(cfname, "r"); 144 if (!yyin) 145 err(1, "%s", cfname); 146 } 147 if (yyparse() || yynerrs) 148 exit(1); 149 150 /* Separate the wildcard jails out from the actual jails. */ 151 jseq = 0; 152 TAILQ_INIT(&wild); 153 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 154 j->seq = ++jseq; 155 if (wild_jail_name(j->name)) 156 requeue(j, &wild); 157 } 158 159 TAILQ_FOREACH(j, &cfjails, tq) { 160 /* Set aside the jail's parameters. */ 161 TAILQ_INIT(&opp); 162 TAILQ_CONCAT(&opp, &j->params, tq); 163 /* 164 * The jail name implies its "name" or "jid" parameter, 165 * though they may also be explicitly set later on. 166 */ 167 add_param(j, NULL, 168 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 169 j->name); 170 /* 171 * Collect parameters for the jail, global parameters/variables, 172 * and any matching wildcard jails. 173 */ 174 did_self = 0; 175 TAILQ_FOREACH(wj, &wild, tq) { 176 if (j->seq < wj->seq && !did_self) { 177 TAILQ_FOREACH(p, &opp, tq) 178 add_param(j, p, 0, NULL); 179 did_self = 1; 180 } 181 if (wild_jail_match(j->name, wj->name)) 182 TAILQ_FOREACH(p, &wj->params, tq) 183 add_param(j, p, 0, NULL); 184 } 185 if (!did_self) 186 TAILQ_FOREACH(p, &opp, tq) 187 add_param(j, p, 0, NULL); 188 189 /* Resolve any variable substitutions. */ 190 pgen = 0; 191 TAILQ_FOREACH(p, &j->params, tq) { 192 p->gen = ++pgen; 193 find_vars: 194 TAILQ_FOREACH(s, &p->val, tq) { 195 while ((v = STAILQ_FIRST(&s->vars))) { 196 TAILQ_FOREACH(vp, &j->params, tq) 197 if (!strcmp(vp->name, v->name)) 198 break; 199 if (!vp) { 200 jail_warnx(j, 201 "%s: variable \"%s\" not found", 202 p->name, v->name); 203 bad_var: 204 j->flags |= JF_FAILED; 205 TAILQ_FOREACH(vp, &j->params, tq) 206 if (vp->gen == pgen) 207 vp->flags |= PF_BAD; 208 goto free_var; 209 } 210 if (vp->flags & PF_BAD) 211 goto bad_var; 212 if (vp->gen == pgen) { 213 jail_warnx(j, "%s: variable loop", 214 v->name); 215 goto bad_var; 216 } 217 TAILQ_FOREACH(vs, &vp->val, tq) 218 if (!STAILQ_EMPTY(&vs->vars)) { 219 vp->gen = pgen; 220 TAILQ_REMOVE(&j->params, vp, 221 tq); 222 TAILQ_INSERT_BEFORE(p, vp, tq); 223 p = vp; 224 goto find_vars; 225 } 226 vs = TAILQ_FIRST(&vp->val); 227 if (TAILQ_NEXT(vs, tq) != NULL && 228 (s->s[0] != '\0' || 229 STAILQ_NEXT(v, tq))) { 230 jail_warnx(j, "%s: array cannot be " 231 "substituted inline", 232 p->name); 233 goto bad_var; 234 } 235 s->s = erealloc(s->s, s->len + vs->len + 1); 236 memmove(s->s + v->pos + vs->len, 237 s->s + v->pos, 238 s->len - v->pos + 1); 239 memcpy(s->s + v->pos, vs->s, vs->len); 240 vv = v; 241 while ((vv = STAILQ_NEXT(vv, tq))) 242 vv->pos += vs->len; 243 s->len += vs->len; 244 while ((vs = TAILQ_NEXT(vs, tq))) { 245 ns = emalloc(sizeof(struct cfstring)); 246 ns->s = estrdup(vs->s); 247 ns->len = vs->len; 248 STAILQ_INIT(&ns->vars); 249 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 250 s = ns; 251 } 252 free_var: 253 free(v->name); 254 STAILQ_REMOVE_HEAD(&s->vars, tq); 255 free(v); 256 } 257 } 258 } 259 260 /* Free the jail's original parameter list and any variables. */ 261 while ((p = TAILQ_FIRST(&opp))) 262 free_param(&opp, p); 263 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 264 if (p->flags & PF_VAR) 265 free_param(&j->params, p); 266 } 267 while ((wj = TAILQ_FIRST(&wild))) { 268 free(wj->name); 269 while ((p = TAILQ_FIRST(&wj->params))) 270 free_param(&wj->params, p); 271 TAILQ_REMOVE(&wild, wj, tq); 272 } 273 } 274 275 /* 276 * Create a new jail record. 277 */ 278 struct cfjail * 279 add_jail(void) 280 { 281 struct cfjail *j; 282 283 j = emalloc(sizeof(struct cfjail)); 284 memset(j, 0, sizeof(struct cfjail)); 285 TAILQ_INIT(&j->params); 286 STAILQ_INIT(&j->dep[DEP_FROM]); 287 STAILQ_INIT(&j->dep[DEP_TO]); 288 j->queue = &cfjails; 289 TAILQ_INSERT_TAIL(&cfjails, j, tq); 290 return j; 291 } 292 293 /* 294 * Add a parameter to a jail. 295 */ 296 void 297 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 298 const char *value) 299 { 300 struct cfstrings nss; 301 struct cfparam *dp, *np; 302 struct cfstring *s, *ns; 303 struct cfvar *v, *nv; 304 const char *name; 305 char *cs, *tname; 306 unsigned flags; 307 308 if (j == NULL) { 309 /* Create a single anonymous jail if one doesn't yet exist. */ 310 j = TAILQ_LAST(&cfjails, cfjails); 311 if (j == NULL) 312 j = add_jail(); 313 } 314 TAILQ_INIT(&nss); 315 if (p != NULL) { 316 name = p->name; 317 flags = p->flags; 318 /* 319 * Make a copy of the parameter's string list, 320 * which may be freed if it's overridden later. 321 */ 322 TAILQ_FOREACH(s, &p->val, tq) { 323 ns = emalloc(sizeof(struct cfstring)); 324 ns->s = estrdup(s->s); 325 ns->len = s->len; 326 STAILQ_INIT(&ns->vars); 327 STAILQ_FOREACH(v, &s->vars, tq) { 328 nv = emalloc(sizeof(struct cfvar)); 329 nv->name = strdup(v->name); 330 nv->pos = v->pos; 331 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 332 } 333 TAILQ_INSERT_TAIL(&nss, ns, tq); 334 } 335 } else { 336 flags = PF_APPEND; 337 if (ipnum != IP__NULL) { 338 name = intparams[ipnum].name; 339 flags |= intparams[ipnum].flags; 340 } else if ((cs = strchr(value, '='))) { 341 tname = alloca(cs - value + 1); 342 strlcpy(tname, value, cs - value + 1); 343 name = tname; 344 value = cs + 1; 345 } else { 346 name = value; 347 value = NULL; 348 } 349 if (value != NULL) { 350 ns = emalloc(sizeof(struct cfstring)); 351 ns->s = estrdup(value); 352 ns->len = strlen(value); 353 STAILQ_INIT(&ns->vars); 354 TAILQ_INSERT_TAIL(&nss, ns, tq); 355 } 356 } 357 358 /* See if this parameter has already been added. */ 359 if (ipnum != IP__NULL) 360 dp = j->intparams[ipnum]; 361 else 362 TAILQ_FOREACH(dp, &j->params, tq) 363 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 364 break; 365 if (dp != NULL) { 366 /* Found it - append or replace. */ 367 if (dp->flags & PF_IMMUTABLE) { 368 jail_warnx(j, "cannot redefine variable \"%s\".", 369 dp->name); 370 return; 371 } 372 if (strcmp(dp->name, name)) { 373 free(dp->name); 374 dp->name = estrdup(name); 375 } 376 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 377 free_param_strings(dp); 378 TAILQ_CONCAT(&dp->val, &nss, tq); 379 dp->flags |= flags; 380 } else { 381 /* Not found - add it. */ 382 np = emalloc(sizeof(struct cfparam)); 383 np->name = estrdup(name); 384 TAILQ_INIT(&np->val); 385 TAILQ_CONCAT(&np->val, &nss, tq); 386 np->flags = flags; 387 np->gen = 0; 388 TAILQ_INSERT_TAIL(&j->params, np, tq); 389 if (ipnum != IP__NULL) 390 j->intparams[ipnum] = np; 391 else 392 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 393 if (!(intparams[ipnum].flags & PF_CONV) && 394 equalopts(name, intparams[ipnum].name)) { 395 j->intparams[ipnum] = np; 396 np->flags |= intparams[ipnum].flags; 397 break; 398 } 399 } 400 } 401 402 /* 403 * Return if a boolean parameter exists and is true. 404 */ 405 int 406 bool_param(const struct cfparam *p) 407 { 408 const char *cs; 409 410 if (p == NULL) 411 return 0; 412 cs = strrchr(p->name, '.'); 413 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 414 (TAILQ_EMPTY(&p->val) || 415 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 416 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 417 } 418 419 /* 420 * Set an integer if a parameter if it exists. 421 */ 422 int 423 int_param(const struct cfparam *p, int *ip) 424 { 425 if (p == NULL || TAILQ_EMPTY(&p->val)) 426 return 0; 427 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 428 return 1; 429 } 430 431 /* 432 * Return the string value of a scalar parameter if it exists. 433 */ 434 const char * 435 string_param(const struct cfparam *p) 436 { 437 return (p && !TAILQ_EMPTY(&p->val) 438 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 439 } 440 441 /* 442 * Check syntax and values of internal parameters. Set some internal 443 * parameters based on the values of others. 444 */ 445 int 446 check_intparams(struct cfjail *j) 447 { 448 struct cfparam *p; 449 struct cfstring *s; 450 FILE *f; 451 const char *val; 452 char *cs, *ep, *ln; 453 size_t lnlen; 454 int error; 455 #if defined(INET) || defined(INET6) 456 struct addrinfo hints; 457 struct addrinfo *ai0, *ai; 458 const char *hostname; 459 int gicode, defif; 460 #endif 461 #ifdef INET 462 struct in_addr addr4; 463 int ip4ok; 464 char avalue4[INET_ADDRSTRLEN]; 465 #endif 466 #ifdef INET6 467 struct in6_addr addr6; 468 int ip6ok; 469 char avalue6[INET6_ADDRSTRLEN]; 470 #endif 471 472 error = 0; 473 /* Check format of boolan and integer values. */ 474 TAILQ_FOREACH(p, &j->params, tq) { 475 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 476 val = TAILQ_LAST(&p->val, cfstrings)->s; 477 if (p->flags & PF_BOOL) { 478 if (strcasecmp(val, "false") && 479 strcasecmp(val, "true") && 480 ((void)strtol(val, &ep, 10), *ep)) { 481 jail_warnx(j, 482 "%s: unknown boolean value \"%s\"", 483 p->name, val); 484 error = -1; 485 } 486 } else { 487 (void)strtol(val, &ep, 10); 488 if (ep == val || *ep) { 489 jail_warnx(j, 490 "%s: non-integer value \"%s\"", 491 p->name, val); 492 error = -1; 493 } 494 } 495 } 496 } 497 498 #if defined(INET) || defined(INET6) 499 /* 500 * The ip_hostname parameter looks up the hostname, and adds parameters 501 * for any IP addresses it finds. 502 */ 503 if (((j->flags & JF_OP_MASK) != JF_STOP || 504 j->intparams[IP_INTERFACE] != NULL) && 505 bool_param(j->intparams[IP_IP_HOSTNAME]) && 506 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 507 j->intparams[IP_IP_HOSTNAME] = NULL; 508 /* 509 * Silently ignore unsupported address families from 510 * DNS lookups. 511 */ 512 #ifdef INET 513 ip4ok = feature_present("inet"); 514 #endif 515 #ifdef INET6 516 ip6ok = feature_present("inet6"); 517 #endif 518 if ( 519 #if defined(INET) && defined(INET6) 520 ip4ok || ip6ok 521 #elif defined(INET) 522 ip4ok 523 #elif defined(INET6) 524 ip6ok 525 #endif 526 ) { 527 /* Look up the hostname (or get the address) */ 528 memset(&hints, 0, sizeof(hints)); 529 hints.ai_socktype = SOCK_STREAM; 530 hints.ai_family = 531 #if defined(INET) && defined(INET6) 532 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 533 #elif defined(INET) 534 PF_INET; 535 #elif defined(INET6) 536 PF_INET6; 537 #endif 538 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 539 if (gicode != 0) { 540 jail_warnx(j, "host.hostname %s: %s", hostname, 541 gai_strerror(gicode)); 542 error = -1; 543 } else { 544 /* 545 * Convert the addresses to ASCII so jailparam 546 * can convert them back. Errors are not 547 * expected here. 548 */ 549 for (ai = ai0; ai; ai = ai->ai_next) 550 switch (ai->ai_family) { 551 #ifdef INET 552 case AF_INET: 553 memcpy(&addr4, 554 &((struct sockaddr_in *) 555 (void *)ai->ai_addr)-> 556 sin_addr, sizeof(addr4)); 557 if (inet_ntop(AF_INET, 558 &addr4, avalue4, 559 INET_ADDRSTRLEN) == NULL) 560 err(1, "inet_ntop"); 561 add_param(j, NULL, KP_IP4_ADDR, 562 avalue4); 563 break; 564 #endif 565 #ifdef INET6 566 case AF_INET6: 567 memcpy(&addr6, 568 &((struct sockaddr_in6 *) 569 (void *)ai->ai_addr)-> 570 sin6_addr, sizeof(addr6)); 571 if (inet_ntop(AF_INET6, 572 &addr6, avalue6, 573 INET6_ADDRSTRLEN) == NULL) 574 err(1, "inet_ntop"); 575 add_param(j, NULL, KP_IP6_ADDR, 576 avalue6); 577 break; 578 #endif 579 } 580 freeaddrinfo(ai0); 581 } 582 } 583 } 584 585 /* 586 * IP addresses may include an interface to set that address on, 587 * a netmask/suffix for that address and options for ifconfig. 588 * These are copied to an internal command parameter and then stripped 589 * so they won't be passed on to jailparam_set. 590 */ 591 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 592 #ifdef INET 593 if (j->intparams[KP_IP4_ADDR] != NULL) { 594 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 595 cs = strchr(s->s, '|'); 596 if (cs || defif) 597 add_param(j, NULL, IP__IP4_IFADDR, s->s); 598 if (cs) { 599 strcpy(s->s, cs + 1); 600 s->len -= cs + 1 - s->s; 601 } 602 if ((cs = strchr(s->s, '/')) != NULL) { 603 *cs = '\0'; 604 s->len = cs - s->s; 605 } 606 if ((cs = strchr(s->s, ' ')) != NULL) { 607 *cs = '\0'; 608 s->len = cs - s->s; 609 } 610 } 611 } 612 #endif 613 #ifdef INET6 614 if (j->intparams[KP_IP6_ADDR] != NULL) { 615 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 616 cs = strchr(s->s, '|'); 617 if (cs || defif) 618 add_param(j, NULL, IP__IP6_IFADDR, s->s); 619 if (cs) { 620 strcpy(s->s, cs + 1); 621 s->len -= cs + 1 - s->s; 622 } 623 if ((cs = strchr(s->s, '/')) != NULL) { 624 *cs = '\0'; 625 s->len = cs - s->s; 626 } 627 if ((cs = strchr(s->s, ' ')) != NULL) { 628 *cs = '\0'; 629 s->len = cs - s->s; 630 } 631 } 632 } 633 #endif 634 #endif 635 636 /* 637 * Read mount.fstab file(s), and treat each line as its own mount 638 * parameter. 639 */ 640 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 641 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 642 if (s->len == 0) 643 continue; 644 f = fopen(s->s, "r"); 645 if (f == NULL) { 646 jail_warnx(j, "mount.fstab: %s: %s", 647 s->s, strerror(errno)); 648 error = -1; 649 continue; 650 } 651 while ((ln = fgetln(f, &lnlen))) { 652 if ((cs = memchr(ln, '#', lnlen - 1))) 653 lnlen = cs - ln + 1; 654 if (ln[lnlen - 1] == '\n' || 655 ln[lnlen - 1] == '#') 656 ln[lnlen - 1] = '\0'; 657 else { 658 cs = alloca(lnlen + 1); 659 strlcpy(cs, ln, lnlen + 1); 660 ln = cs; 661 } 662 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 663 } 664 fclose(f); 665 } 666 } 667 if (error) 668 failed(j); 669 return error; 670 } 671 672 /* 673 * Import parameters into libjail's binary jailparam format. 674 */ 675 int 676 import_params(struct cfjail *j) 677 { 678 struct cfparam *p; 679 struct cfstring *s, *ts; 680 struct jailparam *jp; 681 char *value, *cs; 682 size_t vallen; 683 int error; 684 685 error = 0; 686 j->njp = 0; 687 TAILQ_FOREACH(p, &j->params, tq) 688 if (!(p->flags & PF_INTERNAL)) 689 j->njp++; 690 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 691 TAILQ_FOREACH(p, &j->params, tq) { 692 if (p->flags & PF_INTERNAL) 693 continue; 694 if (jailparam_init(jp, p->name) < 0) { 695 error = -1; 696 jail_warnx(j, "%s", jail_errmsg); 697 jp++; 698 continue; 699 } 700 if (TAILQ_EMPTY(&p->val)) 701 value = NULL; 702 else if (!jp->jp_elemlen || 703 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 704 /* 705 * Scalar parameters silently discard multiple (array) 706 * values, keeping only the last value added. This 707 * lets values added from the command line append to 708 * arrays wthout pre-checking the type. 709 */ 710 value = TAILQ_LAST(&p->val, cfstrings)->s; 711 } else { 712 /* 713 * Convert arrays into comma-separated strings, which 714 * jailparam_import will then convert back into arrays. 715 */ 716 vallen = 0; 717 TAILQ_FOREACH(s, &p->val, tq) 718 vallen += s->len + 1; 719 value = alloca(vallen); 720 cs = value; 721 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 722 memcpy(cs, s->s, s->len); 723 cs += s->len + 1; 724 cs[-1] = ','; 725 } 726 value[vallen - 1] = '\0'; 727 } 728 if (jailparam_import(jp, value) < 0) { 729 error = -1; 730 jail_warnx(j, "%s", jail_errmsg); 731 } 732 jp++; 733 } 734 if (error) { 735 jailparam_free(j->jp, j->njp); 736 free(j->jp); 737 j->jp = NULL; 738 failed(j); 739 } 740 return error; 741 } 742 743 /* 744 * Check if options are equal (with or without the "no" prefix). 745 */ 746 int 747 equalopts(const char *opt1, const char *opt2) 748 { 749 char *p; 750 751 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 752 if (strcmp(opt1, opt2) == 0) 753 return (1); 754 /* "noopt" vs. "opt" */ 755 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 756 return (1); 757 /* "opt" vs. "noopt" */ 758 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 759 return (1); 760 while ((p = strchr(opt1, '.')) != NULL && 761 !strncmp(opt1, opt2, ++p - opt1)) { 762 opt2 += p - opt1; 763 opt1 = p; 764 /* "foo.noopt" vs. "foo.opt" */ 765 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 766 return (1); 767 /* "foo.opt" vs. "foo.noopt" */ 768 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 769 return (1); 770 } 771 return (0); 772 } 773 774 /* 775 * See if a jail name matches a wildcard. 776 */ 777 int 778 wild_jail_match(const char *jname, const char *wname) 779 { 780 const char *jc, *jd, *wc, *wd; 781 782 /* 783 * A non-final "*" component in the wild name matches a single jail 784 * component, and a final "*" matches one or more jail components. 785 */ 786 for (jc = jname, wc = wname; 787 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 788 jc = jd + 1, wc = wd + 1) 789 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 790 return 0; 791 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 792 } 793 794 /* 795 * Return if a jail name is a wildcard. 796 */ 797 int 798 wild_jail_name(const char *wname) 799 { 800 const char *wc; 801 802 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 803 if ((wc == wname || wc[-1] == '.') && 804 (wc[1] == '\0' || wc[1] == '.')) 805 return 1; 806 return 0; 807 } 808 809 /* 810 * Free a parameter record and all its strings and variables. 811 */ 812 static void 813 free_param(struct cfparams *pp, struct cfparam *p) 814 { 815 free(p->name); 816 free_param_strings(p); 817 TAILQ_REMOVE(pp, p, tq); 818 free(p); 819 } 820 821 static void 822 free_param_strings(struct cfparam *p) 823 { 824 struct cfstring *s; 825 struct cfvar *v; 826 827 while ((s = TAILQ_FIRST(&p->val))) { 828 free(s->s); 829 while ((v = STAILQ_FIRST(&s->vars))) { 830 free(v->name); 831 STAILQ_REMOVE_HEAD(&s->vars, tq); 832 free(v); 833 } 834 TAILQ_REMOVE(&p->val, s, tq); 835 free(s); 836 } 837 } 838