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_PREPARE] = {"exec.prepare", PF_INTERNAL}, 75 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL}, 76 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL}, 77 [IP_EXEC_RELEASE] = {"exec.release", PF_INTERNAL}, 78 [IP_EXEC_CREATED] = {"exec.created", PF_INTERNAL}, 79 [IP_EXEC_START] = {"exec.start", PF_INTERNAL}, 80 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL}, 81 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user", 82 PF_INTERNAL | PF_BOOL}, 83 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL}, 84 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT}, 85 #if defined(INET) || defined(INET6) 86 [IP_INTERFACE] = {"interface", PF_INTERNAL}, 87 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL}, 88 #endif 89 [IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV}, 90 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL}, 91 [IP_MOUNT_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL}, 92 [IP_MOUNT_PROCFS] = {"mount.procfs", PF_INTERNAL | PF_BOOL}, 93 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 94 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 95 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 96 #ifdef INET 97 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV}, 98 #endif 99 #ifdef INET6 100 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV}, 101 #endif 102 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV}, 103 [IP__OP] = {NULL, PF_CONV}, 104 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 105 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 106 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 107 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 108 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 109 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 110 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0}, 111 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 112 #ifdef INET 113 [KP_IP4_ADDR] = {"ip4.addr", 0}, 114 #endif 115 #ifdef INET6 116 [KP_IP6_ADDR] = {"ip6.addr", 0}, 117 #endif 118 [KP_JID] = {"jid", PF_IMMUTABLE}, 119 [KP_NAME] = {"name", PF_IMMUTABLE}, 120 [KP_PATH] = {"path", 0}, 121 [KP_PERSIST] = {"persist", 0}, 122 [KP_SECURELEVEL] = {"securelevel", 0}, 123 [KP_VNET] = {"vnet", 0}, 124 }; 125 126 /* 127 * Parse the jail configuration file. 128 */ 129 void 130 load_config(void) 131 { 132 struct cfjails wild; 133 struct cfparams opp; 134 struct cfjail *j, *tj, *wj; 135 struct cfparam *p, *vp, *tp; 136 struct cfstring *s, *vs, *ns; 137 struct cfvar *v, *vv; 138 char *ep; 139 int did_self, jseq, pgen; 140 141 if (!strcmp(cfname, "-")) { 142 cfname = "STDIN"; 143 yyin = stdin; 144 } else { 145 yyin = fopen(cfname, "r"); 146 if (!yyin) 147 err(1, "%s", cfname); 148 } 149 if (yyparse() || yynerrs) 150 exit(1); 151 152 /* Separate the wildcard jails out from the actual jails. */ 153 jseq = 0; 154 TAILQ_INIT(&wild); 155 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 156 j->seq = ++jseq; 157 if (wild_jail_name(j->name)) 158 requeue(j, &wild); 159 } 160 161 TAILQ_FOREACH(j, &cfjails, tq) { 162 /* Set aside the jail's parameters. */ 163 TAILQ_INIT(&opp); 164 TAILQ_CONCAT(&opp, &j->params, tq); 165 /* 166 * The jail name implies its "name" or "jid" parameter, 167 * though they may also be explicitly set later on. 168 */ 169 add_param(j, NULL, 170 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 171 j->name); 172 /* 173 * Collect parameters for the jail, global parameters/variables, 174 * and any matching wildcard jails. 175 */ 176 did_self = 0; 177 TAILQ_FOREACH(wj, &wild, tq) { 178 if (j->seq < wj->seq && !did_self) { 179 TAILQ_FOREACH(p, &opp, tq) 180 add_param(j, p, 0, NULL); 181 did_self = 1; 182 } 183 if (wild_jail_match(j->name, wj->name)) 184 TAILQ_FOREACH(p, &wj->params, tq) 185 add_param(j, p, 0, NULL); 186 } 187 if (!did_self) 188 TAILQ_FOREACH(p, &opp, tq) 189 add_param(j, p, 0, NULL); 190 191 /* Resolve any variable substitutions. */ 192 pgen = 0; 193 TAILQ_FOREACH(p, &j->params, tq) { 194 p->gen = ++pgen; 195 find_vars: 196 TAILQ_FOREACH(s, &p->val, tq) { 197 while ((v = STAILQ_FIRST(&s->vars))) { 198 TAILQ_FOREACH(vp, &j->params, tq) 199 if (!strcmp(vp->name, v->name)) 200 break; 201 if (!vp) { 202 jail_warnx(j, 203 "%s: variable \"%s\" not found", 204 p->name, v->name); 205 bad_var: 206 j->flags |= JF_FAILED; 207 TAILQ_FOREACH(vp, &j->params, tq) 208 if (vp->gen == pgen) 209 vp->flags |= PF_BAD; 210 goto free_var; 211 } 212 if (vp->flags & PF_BAD) 213 goto bad_var; 214 if (vp->gen == pgen) { 215 jail_warnx(j, "%s: variable loop", 216 v->name); 217 goto bad_var; 218 } 219 TAILQ_FOREACH(vs, &vp->val, tq) 220 if (!STAILQ_EMPTY(&vs->vars)) { 221 vp->gen = pgen; 222 TAILQ_REMOVE(&j->params, vp, 223 tq); 224 TAILQ_INSERT_BEFORE(p, vp, tq); 225 p = vp; 226 goto find_vars; 227 } 228 vs = TAILQ_FIRST(&vp->val); 229 if (TAILQ_NEXT(vs, tq) != NULL && 230 (s->s[0] != '\0' || 231 STAILQ_NEXT(v, tq))) { 232 jail_warnx(j, "%s: array cannot be " 233 "substituted inline", 234 p->name); 235 goto bad_var; 236 } 237 s->s = erealloc(s->s, s->len + vs->len + 1); 238 memmove(s->s + v->pos + vs->len, 239 s->s + v->pos, 240 s->len - v->pos + 1); 241 memcpy(s->s + v->pos, vs->s, vs->len); 242 vv = v; 243 while ((vv = STAILQ_NEXT(vv, tq))) 244 vv->pos += vs->len; 245 s->len += vs->len; 246 while ((vs = TAILQ_NEXT(vs, tq))) { 247 ns = emalloc(sizeof(struct cfstring)); 248 ns->s = estrdup(vs->s); 249 ns->len = vs->len; 250 STAILQ_INIT(&ns->vars); 251 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 252 s = ns; 253 } 254 free_var: 255 free(v->name); 256 STAILQ_REMOVE_HEAD(&s->vars, tq); 257 free(v); 258 } 259 } 260 } 261 262 /* Free the jail's original parameter list and any variables. */ 263 while ((p = TAILQ_FIRST(&opp))) 264 free_param(&opp, p); 265 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 266 if (p->flags & PF_VAR) 267 free_param(&j->params, p); 268 } 269 while ((wj = TAILQ_FIRST(&wild))) { 270 free(wj->name); 271 while ((p = TAILQ_FIRST(&wj->params))) 272 free_param(&wj->params, p); 273 TAILQ_REMOVE(&wild, wj, tq); 274 } 275 } 276 277 /* 278 * Create a new jail record. 279 */ 280 struct cfjail * 281 add_jail(void) 282 { 283 struct cfjail *j; 284 285 j = emalloc(sizeof(struct cfjail)); 286 memset(j, 0, sizeof(struct cfjail)); 287 TAILQ_INIT(&j->params); 288 STAILQ_INIT(&j->dep[DEP_FROM]); 289 STAILQ_INIT(&j->dep[DEP_TO]); 290 j->queue = &cfjails; 291 TAILQ_INSERT_TAIL(&cfjails, j, tq); 292 return j; 293 } 294 295 /* 296 * Add a parameter to a jail. 297 */ 298 void 299 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 300 const char *value) 301 { 302 struct cfstrings nss; 303 struct cfparam *dp, *np; 304 struct cfstring *s, *ns; 305 struct cfvar *v, *nv; 306 const char *name; 307 char *cs, *tname; 308 unsigned flags; 309 310 if (j == NULL) { 311 /* Create a single anonymous jail if one doesn't yet exist. */ 312 j = TAILQ_LAST(&cfjails, cfjails); 313 if (j == NULL) 314 j = add_jail(); 315 } 316 TAILQ_INIT(&nss); 317 if (p != NULL) { 318 name = p->name; 319 flags = p->flags; 320 /* 321 * Make a copy of the parameter's string list, 322 * which may be freed if it's overridden later. 323 */ 324 TAILQ_FOREACH(s, &p->val, tq) { 325 ns = emalloc(sizeof(struct cfstring)); 326 ns->s = estrdup(s->s); 327 ns->len = s->len; 328 STAILQ_INIT(&ns->vars); 329 STAILQ_FOREACH(v, &s->vars, tq) { 330 nv = emalloc(sizeof(struct cfvar)); 331 nv->name = strdup(v->name); 332 nv->pos = v->pos; 333 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 334 } 335 TAILQ_INSERT_TAIL(&nss, ns, tq); 336 } 337 } else { 338 flags = PF_APPEND; 339 if (ipnum != IP__NULL) { 340 name = intparams[ipnum].name; 341 flags |= intparams[ipnum].flags; 342 } else if ((cs = strchr(value, '='))) { 343 tname = alloca(cs - value + 1); 344 strlcpy(tname, value, cs - value + 1); 345 name = tname; 346 value = cs + 1; 347 } else { 348 name = value; 349 value = NULL; 350 } 351 if (value != NULL) { 352 ns = emalloc(sizeof(struct cfstring)); 353 ns->s = estrdup(value); 354 ns->len = strlen(value); 355 STAILQ_INIT(&ns->vars); 356 TAILQ_INSERT_TAIL(&nss, ns, tq); 357 } 358 } 359 360 /* See if this parameter has already been added. */ 361 if (ipnum != IP__NULL) 362 dp = j->intparams[ipnum]; 363 else 364 TAILQ_FOREACH(dp, &j->params, tq) 365 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 366 break; 367 if (dp != NULL) { 368 /* Found it - append or replace. */ 369 if (dp->flags & PF_IMMUTABLE) { 370 jail_warnx(j, "cannot redefine variable \"%s\".", 371 dp->name); 372 return; 373 } 374 if (strcmp(dp->name, name)) { 375 free(dp->name); 376 dp->name = estrdup(name); 377 } 378 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 379 free_param_strings(dp); 380 TAILQ_CONCAT(&dp->val, &nss, tq); 381 dp->flags |= flags; 382 } else { 383 /* Not found - add it. */ 384 np = emalloc(sizeof(struct cfparam)); 385 np->name = estrdup(name); 386 TAILQ_INIT(&np->val); 387 TAILQ_CONCAT(&np->val, &nss, tq); 388 np->flags = flags; 389 np->gen = 0; 390 TAILQ_INSERT_TAIL(&j->params, np, tq); 391 if (ipnum != IP__NULL) 392 j->intparams[ipnum] = np; 393 else 394 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 395 if (!(intparams[ipnum].flags & PF_CONV) && 396 equalopts(name, intparams[ipnum].name)) { 397 j->intparams[ipnum] = np; 398 np->flags |= intparams[ipnum].flags; 399 break; 400 } 401 } 402 } 403 404 /* 405 * Return if a boolean parameter exists and is true. 406 */ 407 int 408 bool_param(const struct cfparam *p) 409 { 410 const char *cs; 411 412 if (p == NULL) 413 return 0; 414 cs = strrchr(p->name, '.'); 415 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 416 (TAILQ_EMPTY(&p->val) || 417 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 418 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 419 } 420 421 /* 422 * Set an integer if a parameter if it exists. 423 */ 424 int 425 int_param(const struct cfparam *p, int *ip) 426 { 427 if (p == NULL || TAILQ_EMPTY(&p->val)) 428 return 0; 429 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 430 return 1; 431 } 432 433 /* 434 * Return the string value of a scalar parameter if it exists. 435 */ 436 const char * 437 string_param(const struct cfparam *p) 438 { 439 return (p && !TAILQ_EMPTY(&p->val) 440 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 441 } 442 443 /* 444 * Check syntax and values of internal parameters. Set some internal 445 * parameters based on the values of others. 446 */ 447 int 448 check_intparams(struct cfjail *j) 449 { 450 struct cfparam *p; 451 struct cfstring *s; 452 FILE *f; 453 const char *val; 454 char *cs, *ep, *ln; 455 size_t lnlen; 456 int error; 457 #if defined(INET) || defined(INET6) 458 struct addrinfo hints; 459 struct addrinfo *ai0, *ai; 460 const char *hostname; 461 int gicode, defif; 462 #endif 463 #ifdef INET 464 struct in_addr addr4; 465 int ip4ok; 466 char avalue4[INET_ADDRSTRLEN]; 467 #endif 468 #ifdef INET6 469 struct in6_addr addr6; 470 int ip6ok; 471 char avalue6[INET6_ADDRSTRLEN]; 472 #endif 473 474 error = 0; 475 /* Check format of boolan and integer values. */ 476 TAILQ_FOREACH(p, &j->params, tq) { 477 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 478 val = TAILQ_LAST(&p->val, cfstrings)->s; 479 if (p->flags & PF_BOOL) { 480 if (strcasecmp(val, "false") && 481 strcasecmp(val, "true") && 482 ((void)strtol(val, &ep, 10), *ep)) { 483 jail_warnx(j, 484 "%s: unknown boolean value \"%s\"", 485 p->name, val); 486 error = -1; 487 } 488 } else { 489 (void)strtol(val, &ep, 10); 490 if (ep == val || *ep) { 491 jail_warnx(j, 492 "%s: non-integer value \"%s\"", 493 p->name, val); 494 error = -1; 495 } 496 } 497 } 498 } 499 500 #if defined(INET) || defined(INET6) 501 /* 502 * The ip_hostname parameter looks up the hostname, and adds parameters 503 * for any IP addresses it finds. 504 */ 505 if (((j->flags & JF_OP_MASK) != JF_STOP || 506 j->intparams[IP_INTERFACE] != NULL) && 507 bool_param(j->intparams[IP_IP_HOSTNAME]) && 508 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 509 j->intparams[IP_IP_HOSTNAME] = NULL; 510 /* 511 * Silently ignore unsupported address families from 512 * DNS lookups. 513 */ 514 #ifdef INET 515 ip4ok = feature_present("inet"); 516 #endif 517 #ifdef INET6 518 ip6ok = feature_present("inet6"); 519 #endif 520 if ( 521 #if defined(INET) && defined(INET6) 522 ip4ok || ip6ok 523 #elif defined(INET) 524 ip4ok 525 #elif defined(INET6) 526 ip6ok 527 #endif 528 ) { 529 /* Look up the hostname (or get the address) */ 530 memset(&hints, 0, sizeof(hints)); 531 hints.ai_socktype = SOCK_STREAM; 532 hints.ai_family = 533 #if defined(INET) && defined(INET6) 534 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 535 #elif defined(INET) 536 PF_INET; 537 #elif defined(INET6) 538 PF_INET6; 539 #endif 540 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 541 if (gicode != 0) { 542 jail_warnx(j, "host.hostname %s: %s", hostname, 543 gai_strerror(gicode)); 544 error = -1; 545 } else { 546 /* 547 * Convert the addresses to ASCII so jailparam 548 * can convert them back. Errors are not 549 * expected here. 550 */ 551 for (ai = ai0; ai; ai = ai->ai_next) 552 switch (ai->ai_family) { 553 #ifdef INET 554 case AF_INET: 555 memcpy(&addr4, 556 &((struct sockaddr_in *) 557 (void *)ai->ai_addr)-> 558 sin_addr, sizeof(addr4)); 559 if (inet_ntop(AF_INET, 560 &addr4, avalue4, 561 INET_ADDRSTRLEN) == NULL) 562 err(1, "inet_ntop"); 563 add_param(j, NULL, KP_IP4_ADDR, 564 avalue4); 565 break; 566 #endif 567 #ifdef INET6 568 case AF_INET6: 569 memcpy(&addr6, 570 &((struct sockaddr_in6 *) 571 (void *)ai->ai_addr)-> 572 sin6_addr, sizeof(addr6)); 573 if (inet_ntop(AF_INET6, 574 &addr6, avalue6, 575 INET6_ADDRSTRLEN) == NULL) 576 err(1, "inet_ntop"); 577 add_param(j, NULL, KP_IP6_ADDR, 578 avalue6); 579 break; 580 #endif 581 } 582 freeaddrinfo(ai0); 583 } 584 } 585 } 586 587 /* 588 * IP addresses may include an interface to set that address on, 589 * a netmask/suffix for that address and options for ifconfig. 590 * These are copied to an internal command parameter and then stripped 591 * so they won't be passed on to jailparam_set. 592 */ 593 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 594 #ifdef INET 595 if (j->intparams[KP_IP4_ADDR] != NULL) { 596 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 597 cs = strchr(s->s, '|'); 598 if (cs || defif) 599 add_param(j, NULL, IP__IP4_IFADDR, s->s); 600 if (cs) { 601 s->len -= cs + 1 - s->s; 602 memmove(s->s, cs + 1, s->len + 1); 603 } 604 if ((cs = strchr(s->s, '/')) != NULL) { 605 *cs = '\0'; 606 s->len = cs - s->s; 607 } 608 if ((cs = strchr(s->s, ' ')) != NULL) { 609 *cs = '\0'; 610 s->len = cs - s->s; 611 } 612 } 613 } 614 #endif 615 #ifdef INET6 616 if (j->intparams[KP_IP6_ADDR] != NULL) { 617 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 618 cs = strchr(s->s, '|'); 619 if (cs || defif) 620 add_param(j, NULL, IP__IP6_IFADDR, s->s); 621 if (cs) { 622 s->len -= cs + 1 - s->s; 623 memmove(s->s, cs + 1, s->len + 1); 624 } 625 if ((cs = strchr(s->s, '/')) != NULL) { 626 *cs = '\0'; 627 s->len = cs - s->s; 628 } 629 if ((cs = strchr(s->s, ' ')) != NULL) { 630 *cs = '\0'; 631 s->len = cs - s->s; 632 } 633 } 634 } 635 #endif 636 #endif 637 638 /* 639 * Read mount.fstab file(s), and treat each line as its own mount 640 * parameter. 641 */ 642 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 643 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 644 if (s->len == 0) 645 continue; 646 f = fopen(s->s, "r"); 647 if (f == NULL) { 648 jail_warnx(j, "mount.fstab: %s: %s", 649 s->s, strerror(errno)); 650 error = -1; 651 continue; 652 } 653 while ((ln = fgetln(f, &lnlen))) { 654 if ((cs = memchr(ln, '#', lnlen - 1))) 655 lnlen = cs - ln + 1; 656 if (ln[lnlen - 1] == '\n' || 657 ln[lnlen - 1] == '#') 658 ln[lnlen - 1] = '\0'; 659 else { 660 cs = alloca(lnlen + 1); 661 strlcpy(cs, ln, lnlen + 1); 662 ln = cs; 663 } 664 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 665 } 666 fclose(f); 667 } 668 } 669 if (error) 670 failed(j); 671 return error; 672 } 673 674 /* 675 * Import parameters into libjail's binary jailparam format. 676 */ 677 int 678 import_params(struct cfjail *j) 679 { 680 struct cfparam *p; 681 struct cfstring *s, *ts; 682 struct jailparam *jp; 683 char *value, *cs; 684 size_t vallen; 685 int error; 686 687 error = 0; 688 j->njp = 0; 689 TAILQ_FOREACH(p, &j->params, tq) 690 if (!(p->flags & PF_INTERNAL)) 691 j->njp++; 692 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 693 TAILQ_FOREACH(p, &j->params, tq) { 694 if (p->flags & PF_INTERNAL) 695 continue; 696 if (jailparam_init(jp, p->name) < 0) { 697 error = -1; 698 jail_warnx(j, "%s", jail_errmsg); 699 jp++; 700 continue; 701 } 702 if (TAILQ_EMPTY(&p->val)) 703 value = NULL; 704 else if (!jp->jp_elemlen || 705 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 706 /* 707 * Scalar parameters silently discard multiple (array) 708 * values, keeping only the last value added. This 709 * lets values added from the command line append to 710 * arrays wthout pre-checking the type. 711 */ 712 value = TAILQ_LAST(&p->val, cfstrings)->s; 713 } else { 714 /* 715 * Convert arrays into comma-separated strings, which 716 * jailparam_import will then convert back into arrays. 717 */ 718 vallen = 0; 719 TAILQ_FOREACH(s, &p->val, tq) 720 vallen += s->len + 1; 721 value = alloca(vallen); 722 cs = value; 723 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 724 memcpy(cs, s->s, s->len); 725 cs += s->len + 1; 726 cs[-1] = ','; 727 } 728 value[vallen - 1] = '\0'; 729 } 730 if (jailparam_import(jp, value) < 0) { 731 error = -1; 732 jail_warnx(j, "%s", jail_errmsg); 733 } 734 jp++; 735 } 736 if (error) { 737 jailparam_free(j->jp, j->njp); 738 free(j->jp); 739 j->jp = NULL; 740 failed(j); 741 } 742 return error; 743 } 744 745 /* 746 * Check if options are equal (with or without the "no" prefix). 747 */ 748 int 749 equalopts(const char *opt1, const char *opt2) 750 { 751 char *p; 752 753 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 754 if (strcmp(opt1, opt2) == 0) 755 return (1); 756 /* "noopt" vs. "opt" */ 757 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 758 return (1); 759 /* "opt" vs. "noopt" */ 760 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 761 return (1); 762 while ((p = strchr(opt1, '.')) != NULL && 763 !strncmp(opt1, opt2, ++p - opt1)) { 764 opt2 += p - opt1; 765 opt1 = p; 766 /* "foo.noopt" vs. "foo.opt" */ 767 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 768 return (1); 769 /* "foo.opt" vs. "foo.noopt" */ 770 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 771 return (1); 772 } 773 return (0); 774 } 775 776 /* 777 * See if a jail name matches a wildcard. 778 */ 779 int 780 wild_jail_match(const char *jname, const char *wname) 781 { 782 const char *jc, *jd, *wc, *wd; 783 784 /* 785 * A non-final "*" component in the wild name matches a single jail 786 * component, and a final "*" matches one or more jail components. 787 */ 788 for (jc = jname, wc = wname; 789 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 790 jc = jd + 1, wc = wd + 1) 791 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 792 return 0; 793 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 794 } 795 796 /* 797 * Return if a jail name is a wildcard. 798 */ 799 int 800 wild_jail_name(const char *wname) 801 { 802 const char *wc; 803 804 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 805 if ((wc == wname || wc[-1] == '.') && 806 (wc[1] == '\0' || wc[1] == '.')) 807 return 1; 808 return 0; 809 } 810 811 /* 812 * Free a parameter record and all its strings and variables. 813 */ 814 static void 815 free_param(struct cfparams *pp, struct cfparam *p) 816 { 817 free(p->name); 818 free_param_strings(p); 819 TAILQ_REMOVE(pp, p, tq); 820 free(p); 821 } 822 823 static void 824 free_param_strings(struct cfparam *p) 825 { 826 struct cfstring *s; 827 struct cfvar *v; 828 829 while ((s = TAILQ_FIRST(&p->val))) { 830 free(s->s); 831 while ((v = STAILQ_FIRST(&s->vars))) { 832 free(v->name); 833 STAILQ_REMOVE_HEAD(&s->vars, tq); 834 free(v); 835 } 836 TAILQ_REMOVE(&p->val, s, tq); 837 free(s); 838 } 839 } 840