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_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL}, 87 [IP_MOUNT_PROCFS] = {"mount.procfs", PF_INTERNAL | PF_BOOL}, 88 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 89 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 90 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 91 #ifdef INET 92 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV}, 93 #endif 94 #ifdef INET6 95 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV}, 96 #endif 97 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV}, 98 [IP__OP] = {NULL, PF_CONV}, 99 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 100 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 101 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 102 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 103 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 104 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 105 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0}, 106 [KP_ENFORCE_STATFS] = {"enforce_statfs", 0}, 107 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 108 #ifdef INET 109 [KP_IP4_ADDR] = {"ip4.addr", 0}, 110 #endif 111 #ifdef INET6 112 [KP_IP6_ADDR] = {"ip6.addr", 0}, 113 #endif 114 [KP_JID] = {"jid", 0}, 115 [KP_NAME] = {"name", 0}, 116 [KP_PATH] = {"path", 0}, 117 [KP_PERSIST] = {"persist", 0}, 118 [KP_SECURELEVEL] = {"securelevel", 0}, 119 [KP_VNET] = {"vnet", 0}, 120 }; 121 122 /* 123 * Parse the jail configuration file. 124 */ 125 void 126 load_config(void) 127 { 128 struct cfjails wild; 129 struct cfparams opp; 130 struct cfjail *j, *tj, *wj; 131 struct cfparam *p, *vp, *tp; 132 struct cfstring *s, *vs, *ns; 133 struct cfvar *v; 134 char *ep; 135 size_t varoff; 136 int did_self, jseq, pgen; 137 138 if (!strcmp(cfname, "-")) { 139 cfname = "STDIN"; 140 yyin = stdin; 141 } else { 142 yyin = fopen(cfname, "r"); 143 if (!yyin) 144 err(1, "%s", cfname); 145 } 146 if (yyparse() || yynerrs) 147 exit(1); 148 149 /* Separate the wildcard jails out from the actual jails. */ 150 jseq = 0; 151 TAILQ_INIT(&wild); 152 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 153 j->seq = ++jseq; 154 if (wild_jail_name(j->name)) 155 requeue(j, &wild); 156 } 157 158 TAILQ_FOREACH(j, &cfjails, tq) { 159 /* Set aside the jail's parameters. */ 160 TAILQ_INIT(&opp); 161 TAILQ_CONCAT(&opp, &j->params, tq); 162 /* 163 * The jail name implies its "name" or "jid" parameter, 164 * though they may also be explicitly set later on. 165 */ 166 add_param(j, NULL, 167 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 168 j->name); 169 /* 170 * Collect parameters for the jail, global parameters/variables, 171 * and any matching wildcard jails. 172 */ 173 did_self = 0; 174 TAILQ_FOREACH(wj, &wild, tq) { 175 if (j->seq < wj->seq && !did_self) { 176 TAILQ_FOREACH(p, &opp, tq) 177 add_param(j, p, 0, NULL); 178 did_self = 1; 179 } 180 if (wild_jail_match(j->name, wj->name)) 181 TAILQ_FOREACH(p, &wj->params, tq) 182 add_param(j, p, 0, NULL); 183 } 184 if (!did_self) 185 TAILQ_FOREACH(p, &opp, tq) 186 add_param(j, p, 0, NULL); 187 188 /* Resolve any variable substitutions. */ 189 pgen = 0; 190 TAILQ_FOREACH(p, &j->params, tq) { 191 p->gen = ++pgen; 192 find_vars: 193 TAILQ_FOREACH(s, &p->val, tq) { 194 varoff = 0; 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 + varoff + vs->len, 237 s->s + v->pos + varoff, 238 s->len - (v->pos + varoff) + 1); 239 memcpy(s->s + v->pos + varoff, vs->s, vs->len); 240 varoff += vs->len; 241 s->len += vs->len; 242 while ((vs = TAILQ_NEXT(vs, tq))) { 243 ns = emalloc(sizeof(struct cfstring)); 244 ns->s = estrdup(vs->s); 245 ns->len = vs->len; 246 STAILQ_INIT(&ns->vars); 247 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 248 s = ns; 249 } 250 free_var: 251 free(v->name); 252 STAILQ_REMOVE_HEAD(&s->vars, tq); 253 free(v); 254 } 255 } 256 } 257 258 /* Free the jail's original parameter list and any variables. */ 259 while ((p = TAILQ_FIRST(&opp))) 260 free_param(&opp, p); 261 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 262 if (p->flags & PF_VAR) 263 free_param(&j->params, p); 264 } 265 while ((wj = TAILQ_FIRST(&wild))) { 266 free(wj->name); 267 while ((p = TAILQ_FIRST(&wj->params))) 268 free_param(&wj->params, p); 269 TAILQ_REMOVE(&wild, wj, tq); 270 } 271 } 272 273 /* 274 * Create a new jail record. 275 */ 276 struct cfjail * 277 add_jail(void) 278 { 279 struct cfjail *j; 280 281 j = emalloc(sizeof(struct cfjail)); 282 memset(j, 0, sizeof(struct cfjail)); 283 TAILQ_INIT(&j->params); 284 STAILQ_INIT(&j->dep[DEP_FROM]); 285 STAILQ_INIT(&j->dep[DEP_TO]); 286 j->queue = &cfjails; 287 TAILQ_INSERT_TAIL(&cfjails, j, tq); 288 return j; 289 } 290 291 /* 292 * Add a parameter to a jail. 293 */ 294 void 295 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 296 const char *value) 297 { 298 struct cfstrings nss; 299 struct cfparam *dp, *np; 300 struct cfstring *s, *ns; 301 struct cfvar *v, *nv; 302 const char *name; 303 char *cs, *tname; 304 unsigned flags; 305 306 if (j == NULL) { 307 /* Create a single anonymous jail if one doesn't yet exist. */ 308 j = TAILQ_LAST(&cfjails, cfjails); 309 if (j == NULL) 310 j = add_jail(); 311 } 312 TAILQ_INIT(&nss); 313 if (p != NULL) { 314 name = p->name; 315 flags = p->flags; 316 /* 317 * Make a copy of the parameter's string list, 318 * which may be freed if it's overridden later. 319 */ 320 TAILQ_FOREACH(s, &p->val, tq) { 321 ns = emalloc(sizeof(struct cfstring)); 322 ns->s = estrdup(s->s); 323 ns->len = s->len; 324 STAILQ_INIT(&ns->vars); 325 STAILQ_FOREACH(v, &s->vars, tq) { 326 nv = emalloc(sizeof(struct cfvar)); 327 nv->name = strdup(v->name); 328 nv->pos = v->pos; 329 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 330 } 331 TAILQ_INSERT_TAIL(&nss, ns, tq); 332 } 333 } else { 334 flags = PF_APPEND; 335 if (ipnum != IP__NULL) { 336 name = intparams[ipnum].name; 337 flags |= intparams[ipnum].flags; 338 } else if ((cs = strchr(value, '='))) { 339 tname = alloca(cs - value + 1); 340 strlcpy(tname, value, cs - value + 1); 341 name = tname; 342 value = cs + 1; 343 } else { 344 name = value; 345 value = NULL; 346 } 347 if (value != NULL) { 348 ns = emalloc(sizeof(struct cfstring)); 349 ns->s = estrdup(value); 350 ns->len = strlen(value); 351 STAILQ_INIT(&ns->vars); 352 TAILQ_INSERT_TAIL(&nss, ns, tq); 353 } 354 } 355 356 /* See if this parameter has already been added. */ 357 if (ipnum != IP__NULL) 358 dp = j->intparams[ipnum]; 359 else 360 TAILQ_FOREACH(dp, &j->params, tq) 361 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 362 break; 363 if (dp != NULL) { 364 /* Found it - append or replace. */ 365 if (strcmp(dp->name, name)) { 366 free(dp->name); 367 dp->name = estrdup(name); 368 } 369 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 370 free_param_strings(dp); 371 TAILQ_CONCAT(&dp->val, &nss, tq); 372 dp->flags |= flags; 373 } else { 374 /* Not found - add it. */ 375 np = emalloc(sizeof(struct cfparam)); 376 np->name = estrdup(name); 377 TAILQ_INIT(&np->val); 378 TAILQ_CONCAT(&np->val, &nss, tq); 379 np->flags = flags; 380 np->gen = 0; 381 TAILQ_INSERT_TAIL(&j->params, np, tq); 382 if (ipnum != IP__NULL) 383 j->intparams[ipnum] = np; 384 else 385 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 386 if (!(intparams[ipnum].flags & PF_CONV) && 387 equalopts(name, intparams[ipnum].name)) { 388 j->intparams[ipnum] = np; 389 np->flags |= intparams[ipnum].flags; 390 break; 391 } 392 } 393 } 394 395 /* 396 * Return if a boolean parameter exists and is true. 397 */ 398 int 399 bool_param(const struct cfparam *p) 400 { 401 const char *cs; 402 403 if (p == NULL) 404 return 0; 405 cs = strrchr(p->name, '.'); 406 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 407 (TAILQ_EMPTY(&p->val) || 408 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 409 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 410 } 411 412 /* 413 * Set an integer if a parameter if it exists. 414 */ 415 int 416 int_param(const struct cfparam *p, int *ip) 417 { 418 if (p == NULL || TAILQ_EMPTY(&p->val)) 419 return 0; 420 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 421 return 1; 422 } 423 424 /* 425 * Return the string value of a scalar parameter if it exists. 426 */ 427 const char * 428 string_param(const struct cfparam *p) 429 { 430 return (p && !TAILQ_EMPTY(&p->val) 431 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 432 } 433 434 /* 435 * Check syntax and values of internal parameters. Set some internal 436 * parameters based on the values of others. 437 */ 438 int 439 check_intparams(struct cfjail *j) 440 { 441 struct cfparam *p; 442 struct cfstring *s; 443 FILE *f; 444 const char *val; 445 char *cs, *ep, *ln; 446 size_t lnlen; 447 int error; 448 #if defined(INET) || defined(INET6) 449 struct addrinfo hints; 450 struct addrinfo *ai0, *ai; 451 const char *hostname; 452 int gicode, defif, prefix; 453 #endif 454 #ifdef INET 455 struct in_addr addr4; 456 int ip4ok; 457 char avalue4[INET_ADDRSTRLEN]; 458 #endif 459 #ifdef INET6 460 struct in6_addr addr6; 461 int ip6ok; 462 char avalue6[INET6_ADDRSTRLEN]; 463 #endif 464 465 error = 0; 466 /* Check format of boolan and integer values. */ 467 TAILQ_FOREACH(p, &j->params, tq) { 468 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 469 val = TAILQ_LAST(&p->val, cfstrings)->s; 470 if (p->flags & PF_BOOL) { 471 if (strcasecmp(val, "false") && 472 strcasecmp(val, "true") && 473 ((void)strtol(val, &ep, 10), *ep)) { 474 jail_warnx(j, 475 "%s: unknown boolean value \"%s\"", 476 p->name, val); 477 error = -1; 478 } 479 } else { 480 (void)strtol(val, &ep, 10); 481 if (ep == val || *ep) { 482 jail_warnx(j, 483 "%s: non-integer value \"%s\"", 484 p->name, val); 485 error = -1; 486 } 487 } 488 } 489 } 490 491 #if defined(INET) || defined(INET6) 492 /* 493 * The ip_hostname parameter looks up the hostname, and adds parameters 494 * for any IP addresses it finds. 495 */ 496 if (((j->flags & JF_OP_MASK) != JF_STOP || 497 j->intparams[IP_INTERFACE] != NULL) && 498 bool_param(j->intparams[IP_IP_HOSTNAME]) && 499 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 500 j->intparams[IP_IP_HOSTNAME] = NULL; 501 /* 502 * Silently ignore unsupported address families from 503 * DNS lookups. 504 */ 505 #ifdef INET 506 ip4ok = feature_present("inet"); 507 #endif 508 #ifdef INET6 509 ip6ok = feature_present("inet6"); 510 #endif 511 if ( 512 #if defined(INET) && defined(INET6) 513 ip4ok || ip6ok 514 #elif defined(INET) 515 ip4ok 516 #elif defined(INET6) 517 ip6ok 518 #endif 519 ) { 520 /* Look up the hostname (or get the address) */ 521 memset(&hints, 0, sizeof(hints)); 522 hints.ai_socktype = SOCK_STREAM; 523 hints.ai_family = 524 #if defined(INET) && defined(INET6) 525 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 526 #elif defined(INET) 527 PF_INET; 528 #elif defined(INET6) 529 PF_INET6; 530 #endif 531 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 532 if (gicode != 0) { 533 jail_warnx(j, "host.hostname %s: %s", hostname, 534 gai_strerror(gicode)); 535 error = -1; 536 } else { 537 /* 538 * Convert the addresses to ASCII so jailparam 539 * can convert them back. Errors are not 540 * expected here. 541 */ 542 for (ai = ai0; ai; ai = ai->ai_next) 543 switch (ai->ai_family) { 544 #ifdef INET 545 case AF_INET: 546 memcpy(&addr4, 547 &((struct sockaddr_in *) 548 (void *)ai->ai_addr)-> 549 sin_addr, sizeof(addr4)); 550 if (inet_ntop(AF_INET, 551 &addr4, avalue4, 552 INET_ADDRSTRLEN) == NULL) 553 err(1, "inet_ntop"); 554 add_param(j, NULL, KP_IP4_ADDR, 555 avalue4); 556 break; 557 #endif 558 #ifdef INET6 559 case AF_INET6: 560 memcpy(&addr6, 561 &((struct sockaddr_in6 *) 562 (void *)ai->ai_addr)-> 563 sin6_addr, sizeof(addr6)); 564 if (inet_ntop(AF_INET6, 565 &addr6, avalue6, 566 INET6_ADDRSTRLEN) == NULL) 567 err(1, "inet_ntop"); 568 add_param(j, NULL, KP_IP6_ADDR, 569 avalue6); 570 break; 571 #endif 572 } 573 freeaddrinfo(ai0); 574 } 575 } 576 } 577 578 /* 579 * IP addresses may include an interface to set that address on, 580 * a netmask/suffix for that address and options for ifconfig. 581 * These are copied to an internal command parameter and then stripped 582 * so they won't be passed on to jailparam_set. 583 */ 584 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 585 #ifdef INET 586 if (j->intparams[KP_IP4_ADDR] != NULL) { 587 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 588 cs = strchr(s->s, '|'); 589 if (cs || defif) 590 add_param(j, NULL, IP__IP4_IFADDR, s->s); 591 if (cs) { 592 strcpy(s->s, cs + 1); 593 s->len -= cs + 1 - s->s; 594 } 595 if ((cs = strchr(s->s, '/'))) { 596 prefix = strtol(cs + 1, &ep, 10); 597 if (*ep == '.' 598 ? inet_pton(AF_INET, cs + 1, &addr4) != 1 599 : *ep || prefix < 0 || prefix > 32) { 600 jail_warnx(j, 601 "ip4.addr: bad netmask \"%s\"", cs); 602 error = -1; 603 } 604 *cs = '\0'; 605 s->len = cs - s->s; 606 } 607 if ((cs = strchr(s->s, ' ')) != NULL) { 608 *cs = '\0'; 609 s->len = cs - s->s; 610 } 611 } 612 } 613 #endif 614 #ifdef INET6 615 if (j->intparams[KP_IP6_ADDR] != NULL) { 616 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 617 cs = strchr(s->s, '|'); 618 if (cs || defif) 619 add_param(j, NULL, IP__IP6_IFADDR, s->s); 620 if (cs) { 621 strcpy(s->s, cs + 1); 622 s->len -= cs + 1 - s->s; 623 } 624 if ((cs = strchr(s->s, '/'))) { 625 prefix = strtol(cs + 1, &ep, 10); 626 if (*ep || prefix < 0 || prefix > 128) { 627 jail_warnx(j, 628 "ip6.addr: bad prefixlen \"%s\"", 629 cs); 630 error = -1; 631 } 632 *cs = '\0'; 633 s->len = cs - s->s; 634 } 635 if ((cs = strchr(s->s, ' ')) != NULL) { 636 *cs = '\0'; 637 s->len = cs - s->s; 638 } 639 } 640 } 641 #endif 642 #endif 643 644 /* 645 * Read mount.fstab file(s), and treat each line as its own mount 646 * parameter. 647 */ 648 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 649 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 650 if (s->len == 0) 651 continue; 652 f = fopen(s->s, "r"); 653 if (f == NULL) { 654 jail_warnx(j, "mount.fstab: %s: %s", 655 s->s, strerror(errno)); 656 error = -1; 657 continue; 658 } 659 while ((ln = fgetln(f, &lnlen))) { 660 if ((cs = memchr(ln, '#', lnlen - 1))) 661 lnlen = cs - ln + 1; 662 if (ln[lnlen - 1] == '\n' || 663 ln[lnlen - 1] == '#') 664 ln[lnlen - 1] = '\0'; 665 else { 666 cs = alloca(lnlen + 1); 667 strlcpy(cs, ln, lnlen + 1); 668 ln = cs; 669 } 670 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 671 } 672 fclose(f); 673 } 674 } 675 if (error) 676 failed(j); 677 return error; 678 } 679 680 /* 681 * Import parameters into libjail's binary jailparam format. 682 */ 683 int 684 import_params(struct cfjail *j) 685 { 686 struct cfparam *p; 687 struct cfstring *s, *ts; 688 struct jailparam *jp; 689 char *value, *cs; 690 size_t vallen; 691 int error; 692 693 error = 0; 694 j->njp = 0; 695 TAILQ_FOREACH(p, &j->params, tq) 696 if (!(p->flags & PF_INTERNAL)) 697 j->njp++; 698 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 699 TAILQ_FOREACH(p, &j->params, tq) { 700 if (p->flags & PF_INTERNAL) 701 continue; 702 if (jailparam_init(jp, p->name) < 0) { 703 error = -1; 704 jail_warnx(j, "%s", jail_errmsg); 705 jp++; 706 continue; 707 } 708 if (TAILQ_EMPTY(&p->val)) 709 value = NULL; 710 else if (!jp->jp_elemlen || 711 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 712 /* 713 * Scalar parameters silently discard multiple (array) 714 * values, keeping only the last value added. This 715 * lets values added from the command line append to 716 * arrays wthout pre-checking the type. 717 */ 718 value = TAILQ_LAST(&p->val, cfstrings)->s; 719 } else { 720 /* 721 * Convert arrays into comma-separated strings, which 722 * jailparam_import will then convert back into arrays. 723 */ 724 vallen = 0; 725 TAILQ_FOREACH(s, &p->val, tq) 726 vallen += s->len + 1; 727 value = alloca(vallen); 728 cs = value; 729 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 730 memcpy(cs, s->s, s->len); 731 cs += s->len + 1; 732 cs[-1] = ','; 733 } 734 value[vallen - 1] = '\0'; 735 } 736 if (jailparam_import(jp, value) < 0) { 737 error = -1; 738 jail_warnx(j, "%s", jail_errmsg); 739 } 740 jp++; 741 } 742 if (error) { 743 jailparam_free(j->jp, j->njp); 744 free(j->jp); 745 j->jp = NULL; 746 failed(j); 747 } 748 return error; 749 } 750 751 /* 752 * Check if options are equal (with or without the "no" prefix). 753 */ 754 int 755 equalopts(const char *opt1, const char *opt2) 756 { 757 char *p; 758 759 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 760 if (strcmp(opt1, opt2) == 0) 761 return (1); 762 /* "noopt" vs. "opt" */ 763 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 764 return (1); 765 /* "opt" vs. "noopt" */ 766 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 767 return (1); 768 while ((p = strchr(opt1, '.')) != NULL && 769 !strncmp(opt1, opt2, ++p - opt1)) { 770 opt2 += p - opt1; 771 opt1 = p; 772 /* "foo.noopt" vs. "foo.opt" */ 773 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 774 return (1); 775 /* "foo.opt" vs. "foo.noopt" */ 776 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 777 return (1); 778 } 779 return (0); 780 } 781 782 /* 783 * See if a jail name matches a wildcard. 784 */ 785 int 786 wild_jail_match(const char *jname, const char *wname) 787 { 788 const char *jc, *jd, *wc, *wd; 789 790 /* 791 * A non-final "*" component in the wild name matches a single jail 792 * component, and a final "*" matches one or more jail components. 793 */ 794 for (jc = jname, wc = wname; 795 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 796 jc = jd + 1, wc = wd + 1) 797 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 798 return 0; 799 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 800 } 801 802 /* 803 * Return if a jail name is a wildcard. 804 */ 805 int 806 wild_jail_name(const char *wname) 807 { 808 const char *wc; 809 810 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 811 if ((wc == wname || wc[-1] == '.') && 812 (wc[1] == '\0' || wc[1] == '.')) 813 return 1; 814 return 0; 815 } 816 817 /* 818 * Free a parameter record and all its strings and variables. 819 */ 820 static void 821 free_param(struct cfparams *pp, struct cfparam *p) 822 { 823 free(p->name); 824 free_param_strings(p); 825 TAILQ_REMOVE(pp, p, tq); 826 free(p); 827 } 828 829 static void 830 free_param_strings(struct cfparam *p) 831 { 832 struct cfstring *s; 833 struct cfvar *v; 834 835 while ((s = TAILQ_FIRST(&p->val))) { 836 free(s->s); 837 while ((v = STAILQ_FIRST(&s->vars))) { 838 free(v->name); 839 STAILQ_REMOVE_HEAD(&s->vars, tq); 840 free(v); 841 } 842 TAILQ_REMOVE(&p->val, s, tq); 843 free(s); 844 } 845 } 846