1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/types.h> 30 #include <sys/errno.h> 31 #include <sys/socket.h> 32 #include <sys/sysctl.h> 33 34 #include <arpa/inet.h> 35 #include <netinet/in.h> 36 37 #include <err.h> 38 #include <glob.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 #define MAX_INCLUDE_DEPTH 32 48 49 struct ipspec { 50 const char *name; 51 unsigned flags; 52 }; 53 54 extern int yylex_init_extra(struct cflex *extra, void *scanner); 55 extern int yylex_destroy(void *scanner); 56 extern int yyparse(void *scanner); 57 extern int yyset_in(FILE *fp, void *scanner); 58 59 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 60 61 static void parse_config(const char *fname, int is_stdin); 62 static void free_param(struct cfparams *pp, 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(const char *cfname) 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 parse_config(cfname, !strcmp(cfname, "-")); 142 143 /* Separate the wildcard jails out from the actual jails. */ 144 jseq = 0; 145 TAILQ_INIT(&wild); 146 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 147 j->seq = ++jseq; 148 if (wild_jail_name(j->name)) 149 requeue(j, &wild); 150 } 151 152 TAILQ_FOREACH(j, &cfjails, tq) { 153 /* Set aside the jail's parameters. */ 154 TAILQ_INIT(&opp); 155 TAILQ_CONCAT(&opp, &j->params, tq); 156 /* 157 * The jail name implies its "name" or "jid" parameter, 158 * though they may also be explicitly set later on. 159 */ 160 add_param(j, NULL, 161 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 162 j->name); 163 /* 164 * Collect parameters for the jail, global parameters/variables, 165 * and any matching wildcard jails. 166 */ 167 did_self = 0; 168 TAILQ_FOREACH(wj, &wild, tq) { 169 if (j->seq < wj->seq && !did_self) { 170 TAILQ_FOREACH(p, &opp, tq) 171 add_param(j, p, 0, NULL); 172 did_self = 1; 173 } 174 if (wild_jail_match(j->name, wj->name)) 175 TAILQ_FOREACH(p, &wj->params, tq) 176 add_param(j, p, 0, NULL); 177 } 178 if (!did_self) 179 TAILQ_FOREACH(p, &opp, tq) 180 add_param(j, p, 0, NULL); 181 182 /* Resolve any variable substitutions. */ 183 pgen = 0; 184 TAILQ_FOREACH(p, &j->params, tq) { 185 p->gen = ++pgen; 186 find_vars: 187 TAILQ_FOREACH(s, &p->val, tq) { 188 while ((v = STAILQ_FIRST(&s->vars))) { 189 TAILQ_FOREACH(vp, &j->params, tq) 190 if (!strcmp(vp->name, v->name)) 191 break; 192 if (!vp || TAILQ_EMPTY(&vp->val)) { 193 jail_warnx(j, 194 "%s: variable \"%s\" not found", 195 p->name, v->name); 196 bad_var: 197 j->flags |= JF_FAILED; 198 TAILQ_FOREACH(vp, &j->params, tq) 199 if (vp->gen == pgen) 200 vp->flags |= PF_BAD; 201 goto free_var; 202 } 203 if (vp->flags & PF_BAD) 204 goto bad_var; 205 if (vp->gen == pgen) { 206 jail_warnx(j, "%s: variable loop", 207 v->name); 208 goto bad_var; 209 } 210 TAILQ_FOREACH(vs, &vp->val, tq) 211 if (!STAILQ_EMPTY(&vs->vars)) { 212 vp->gen = pgen; 213 TAILQ_REMOVE(&j->params, vp, 214 tq); 215 TAILQ_INSERT_BEFORE(p, vp, tq); 216 p = vp; 217 goto find_vars; 218 } 219 vs = TAILQ_FIRST(&vp->val); 220 if (TAILQ_NEXT(vs, tq) != NULL && 221 (s->s[0] != '\0' || 222 STAILQ_NEXT(v, tq))) { 223 jail_warnx(j, "%s: array cannot be " 224 "substituted inline", 225 p->name); 226 goto bad_var; 227 } 228 s->s = erealloc(s->s, s->len + vs->len + 1); 229 memmove(s->s + v->pos + vs->len, 230 s->s + v->pos, 231 s->len - v->pos + 1); 232 memcpy(s->s + v->pos, vs->s, vs->len); 233 vv = v; 234 while ((vv = STAILQ_NEXT(vv, tq))) 235 vv->pos += vs->len; 236 s->len += vs->len; 237 while ((vs = TAILQ_NEXT(vs, tq))) { 238 ns = emalloc(sizeof(struct cfstring)); 239 ns->s = estrdup(vs->s); 240 ns->len = vs->len; 241 STAILQ_INIT(&ns->vars); 242 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 243 s = ns; 244 } 245 free_var: 246 free(v->name); 247 STAILQ_REMOVE_HEAD(&s->vars, tq); 248 free(v); 249 } 250 } 251 } 252 253 /* Free the jail's original parameter list and any variables. */ 254 while ((p = TAILQ_FIRST(&opp))) 255 free_param(&opp, p); 256 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 257 if (p->flags & PF_VAR) 258 free_param(&j->params, p); 259 } 260 while ((wj = TAILQ_FIRST(&wild))) { 261 free(wj->name); 262 while ((p = TAILQ_FIRST(&wj->params))) 263 free_param(&wj->params, p); 264 TAILQ_REMOVE(&wild, wj, tq); 265 } 266 } 267 268 void 269 include_config(void *scanner, const char *cfname) 270 { 271 static unsigned int depth; 272 glob_t g = {0}; 273 const char *slash; 274 char *fullpath = NULL; 275 276 /* Simple sanity check for include loops. */ 277 if (++depth > MAX_INCLUDE_DEPTH) 278 errx(1, "maximum include depth exceeded"); 279 /* Base relative pathnames on the current config file. */ 280 if (yyget_in(scanner) != stdin && cfname[0] != '/') { 281 const char *outer_cfname = yyget_extra(scanner)->cfname; 282 if ((slash = strrchr(outer_cfname, '/')) != NULL) { 283 size_t dirlen = (slash - outer_cfname) + 1; 284 285 fullpath = emalloc(dirlen + strlen(cfname) + 1); 286 strncpy(fullpath, outer_cfname, dirlen); 287 strcpy(fullpath + dirlen, cfname); 288 cfname = fullpath; 289 } 290 } 291 /* 292 * Check if the include statement had a filename glob. 293 * Globbing doesn't need to catch any files, but a non-glob 294 * file needs to exist (enforced by parse_config). 295 */ 296 if (glob(cfname, GLOB_NOCHECK, NULL, &g) != 0) 297 errx(1, "%s: filename glob failed", cfname); 298 if (g.gl_flags & GLOB_MAGCHAR) { 299 for (size_t gi = 0; gi < g.gl_matchc; gi++) 300 parse_config(g.gl_pathv[gi], 0); 301 } else 302 parse_config(cfname, 0); 303 if (fullpath) 304 free(fullpath); 305 --depth; 306 } 307 308 static void 309 parse_config(const char *cfname, int is_stdin) 310 { 311 struct cflex cflex = {.cfname = cfname, .error = 0}; 312 void *scanner; 313 314 yylex_init_extra(&cflex, &scanner); 315 if (is_stdin) { 316 cflex.cfname = "STDIN"; 317 yyset_in(stdin, scanner); 318 } else { 319 FILE *yfp = fopen(cfname, "r"); 320 if (!yfp) 321 err(1, "%s", cfname); 322 yyset_in(yfp, scanner); 323 } 324 if (yyparse(scanner) || cflex.error) 325 exit(1); 326 yylex_destroy(scanner); 327 } 328 329 /* 330 * Create a new jail record. 331 */ 332 struct cfjail * 333 add_jail(void) 334 { 335 struct cfjail *j; 336 337 j = emalloc(sizeof(struct cfjail)); 338 memset(j, 0, sizeof(struct cfjail)); 339 TAILQ_INIT(&j->params); 340 STAILQ_INIT(&j->dep[DEP_FROM]); 341 STAILQ_INIT(&j->dep[DEP_TO]); 342 j->queue = &cfjails; 343 TAILQ_INSERT_TAIL(&cfjails, j, tq); 344 return j; 345 } 346 347 /* 348 * Add a parameter to a jail. 349 */ 350 void 351 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 352 const char *value) 353 { 354 struct cfstrings nss; 355 struct cfparam *dp, *np; 356 struct cfstring *s, *ns; 357 struct cfvar *v, *nv; 358 const char *name; 359 char *cs, *tname; 360 unsigned flags; 361 362 if (j == NULL) { 363 /* Create a single anonymous jail if one doesn't yet exist. */ 364 j = TAILQ_LAST(&cfjails, cfjails); 365 if (j == NULL) 366 j = add_jail(); 367 } 368 TAILQ_INIT(&nss); 369 if (p != NULL) { 370 name = p->name; 371 flags = p->flags; 372 /* 373 * Make a copy of the parameter's string list, 374 * which may be freed if it's overridden later. 375 */ 376 TAILQ_FOREACH(s, &p->val, tq) { 377 ns = emalloc(sizeof(struct cfstring)); 378 ns->s = estrdup(s->s); 379 ns->len = s->len; 380 STAILQ_INIT(&ns->vars); 381 STAILQ_FOREACH(v, &s->vars, tq) { 382 nv = emalloc(sizeof(struct cfvar)); 383 nv->name = strdup(v->name); 384 nv->pos = v->pos; 385 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 386 } 387 TAILQ_INSERT_TAIL(&nss, ns, tq); 388 } 389 } else { 390 flags = PF_APPEND; 391 if (ipnum != IP__NULL) { 392 name = intparams[ipnum].name; 393 flags |= intparams[ipnum].flags; 394 } else if ((cs = strchr(value, '='))) { 395 tname = alloca(cs - value + 1); 396 strlcpy(tname, value, cs - value + 1); 397 name = tname; 398 value = cs + 1; 399 } else { 400 name = value; 401 value = NULL; 402 } 403 if (value != NULL) { 404 ns = emalloc(sizeof(struct cfstring)); 405 ns->s = estrdup(value); 406 ns->len = strlen(value); 407 STAILQ_INIT(&ns->vars); 408 TAILQ_INSERT_TAIL(&nss, ns, tq); 409 } 410 } 411 412 /* See if this parameter has already been added. */ 413 if (ipnum != IP__NULL) 414 dp = j->intparams[ipnum]; 415 else 416 TAILQ_FOREACH(dp, &j->params, tq) 417 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 418 break; 419 if (dp != NULL) { 420 /* Found it - append or replace. */ 421 if ((flags ^ dp->flags) & PF_VAR) { 422 jail_warnx(j, "variable \"$%s\" cannot have the same " 423 "name as a parameter.", name); 424 j->flags |= JF_FAILED; 425 return; 426 } 427 if (dp->flags & PF_IMMUTABLE) { 428 jail_warnx(j, "cannot redefine parameter \"%s\".", 429 dp->name); 430 j->flags |= JF_FAILED; 431 return; 432 } 433 if (strcmp(dp->name, name)) { 434 free(dp->name); 435 dp->name = estrdup(name); 436 } 437 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 438 free_param_strings(dp); 439 TAILQ_CONCAT(&dp->val, &nss, tq); 440 dp->flags |= flags; 441 } else { 442 /* Not found - add it. */ 443 np = emalloc(sizeof(struct cfparam)); 444 np->name = estrdup(name); 445 TAILQ_INIT(&np->val); 446 TAILQ_CONCAT(&np->val, &nss, tq); 447 np->flags = flags; 448 np->gen = 0; 449 TAILQ_INSERT_TAIL(&j->params, np, tq); 450 if (ipnum != IP__NULL) 451 j->intparams[ipnum] = np; 452 else 453 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 454 if (!(intparams[ipnum].flags & PF_CONV) && 455 equalopts(name, intparams[ipnum].name)) { 456 if (flags & PF_VAR) { 457 jail_warnx(j, 458 "variable \"$%s\" " 459 "cannot have the same " 460 "name as a parameter.", 461 name); 462 j->flags |= JF_FAILED; 463 return; 464 } 465 j->intparams[ipnum] = np; 466 np->flags |= intparams[ipnum].flags; 467 break; 468 } 469 } 470 } 471 472 /* 473 * Return if a boolean parameter exists and is true. 474 */ 475 int 476 bool_param(const struct cfparam *p) 477 { 478 const char *cs; 479 480 if (p == NULL) 481 return 0; 482 cs = strrchr(p->name, '.'); 483 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 484 (TAILQ_EMPTY(&p->val) || 485 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 486 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 487 } 488 489 /* 490 * Set an integer if a parameter if it exists. 491 */ 492 int 493 int_param(const struct cfparam *p, int *ip) 494 { 495 if (p == NULL || TAILQ_EMPTY(&p->val)) 496 return 0; 497 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 498 return 1; 499 } 500 501 /* 502 * Return the string value of a scalar parameter if it exists. 503 */ 504 const char * 505 string_param(const struct cfparam *p) 506 { 507 return (p && !TAILQ_EMPTY(&p->val) 508 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 509 } 510 511 /* 512 * Check syntax and values of internal parameters. Set some internal 513 * parameters based on the values of others. 514 */ 515 int 516 check_intparams(struct cfjail *j) 517 { 518 struct cfparam *p; 519 struct cfstring *s; 520 FILE *f; 521 const char *val; 522 char *cs, *ep, *ln; 523 size_t lnlen; 524 int error; 525 #if defined(INET) || defined(INET6) 526 struct addrinfo hints; 527 struct addrinfo *ai0, *ai; 528 const char *hostname; 529 int gicode, defif; 530 #endif 531 #ifdef INET 532 struct in_addr addr4; 533 int ip4ok; 534 char avalue4[INET_ADDRSTRLEN]; 535 #endif 536 #ifdef INET6 537 struct in6_addr addr6; 538 int ip6ok; 539 char avalue6[INET6_ADDRSTRLEN]; 540 #endif 541 542 error = 0; 543 /* Check format of boolan and integer values. */ 544 TAILQ_FOREACH(p, &j->params, tq) { 545 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 546 val = TAILQ_LAST(&p->val, cfstrings)->s; 547 if (p->flags & PF_BOOL) { 548 if (strcasecmp(val, "false") && 549 strcasecmp(val, "true") && 550 ((void)strtol(val, &ep, 10), *ep)) { 551 jail_warnx(j, 552 "%s: unknown boolean value \"%s\"", 553 p->name, val); 554 error = -1; 555 } 556 } else { 557 (void)strtol(val, &ep, 10); 558 if (ep == val || *ep) { 559 jail_warnx(j, 560 "%s: non-integer value \"%s\"", 561 p->name, val); 562 error = -1; 563 } 564 } 565 } 566 } 567 568 #if defined(INET) || defined(INET6) 569 /* 570 * The ip_hostname parameter looks up the hostname, and adds parameters 571 * for any IP addresses it finds. 572 */ 573 if (((j->flags & JF_OP_MASK) != JF_STOP || 574 j->intparams[IP_INTERFACE] != NULL) && 575 bool_param(j->intparams[IP_IP_HOSTNAME]) && 576 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 577 j->intparams[IP_IP_HOSTNAME] = NULL; 578 /* 579 * Silently ignore unsupported address families from 580 * DNS lookups. 581 */ 582 #ifdef INET 583 ip4ok = feature_present("inet"); 584 #endif 585 #ifdef INET6 586 ip6ok = feature_present("inet6"); 587 #endif 588 if ( 589 #if defined(INET) && defined(INET6) 590 ip4ok || ip6ok 591 #elif defined(INET) 592 ip4ok 593 #elif defined(INET6) 594 ip6ok 595 #endif 596 ) { 597 /* Look up the hostname (or get the address) */ 598 memset(&hints, 0, sizeof(hints)); 599 hints.ai_socktype = SOCK_STREAM; 600 hints.ai_family = 601 #if defined(INET) && defined(INET6) 602 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 603 #elif defined(INET) 604 PF_INET; 605 #elif defined(INET6) 606 PF_INET6; 607 #endif 608 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 609 if (gicode != 0) { 610 jail_warnx(j, "host.hostname %s: %s", hostname, 611 gai_strerror(gicode)); 612 error = -1; 613 } else { 614 /* 615 * Convert the addresses to ASCII so jailparam 616 * can convert them back. Errors are not 617 * expected here. 618 */ 619 for (ai = ai0; ai; ai = ai->ai_next) 620 switch (ai->ai_family) { 621 #ifdef INET 622 case AF_INET: 623 memcpy(&addr4, 624 &((struct sockaddr_in *) 625 (void *)ai->ai_addr)-> 626 sin_addr, sizeof(addr4)); 627 if (inet_ntop(AF_INET, 628 &addr4, avalue4, 629 INET_ADDRSTRLEN) == NULL) 630 err(1, "inet_ntop"); 631 add_param(j, NULL, KP_IP4_ADDR, 632 avalue4); 633 break; 634 #endif 635 #ifdef INET6 636 case AF_INET6: 637 memcpy(&addr6, 638 &((struct sockaddr_in6 *) 639 (void *)ai->ai_addr)-> 640 sin6_addr, sizeof(addr6)); 641 if (inet_ntop(AF_INET6, 642 &addr6, avalue6, 643 INET6_ADDRSTRLEN) == NULL) 644 err(1, "inet_ntop"); 645 add_param(j, NULL, KP_IP6_ADDR, 646 avalue6); 647 break; 648 #endif 649 } 650 freeaddrinfo(ai0); 651 } 652 } 653 } 654 655 /* 656 * IP addresses may include an interface to set that address on, 657 * a netmask/suffix for that address and options for ifconfig. 658 * These are copied to an internal command parameter and then stripped 659 * so they won't be passed on to jailparam_set. 660 */ 661 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 662 #ifdef INET 663 if (j->intparams[KP_IP4_ADDR] != NULL) { 664 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 665 cs = strchr(s->s, '|'); 666 if (cs || defif) 667 add_param(j, NULL, IP__IP4_IFADDR, s->s); 668 if (cs) { 669 s->len -= cs + 1 - s->s; 670 memmove(s->s, cs + 1, s->len + 1); 671 } 672 if ((cs = strchr(s->s, '/')) != NULL) { 673 *cs = '\0'; 674 s->len = cs - s->s; 675 } 676 if ((cs = strchr(s->s, ' ')) != NULL) { 677 *cs = '\0'; 678 s->len = cs - s->s; 679 } 680 } 681 } 682 #endif 683 #ifdef INET6 684 if (j->intparams[KP_IP6_ADDR] != NULL) { 685 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 686 cs = strchr(s->s, '|'); 687 if (cs || defif) 688 add_param(j, NULL, IP__IP6_IFADDR, s->s); 689 if (cs) { 690 s->len -= cs + 1 - s->s; 691 memmove(s->s, cs + 1, s->len + 1); 692 } 693 if ((cs = strchr(s->s, '/')) != NULL) { 694 *cs = '\0'; 695 s->len = cs - s->s; 696 } 697 if ((cs = strchr(s->s, ' ')) != NULL) { 698 *cs = '\0'; 699 s->len = cs - s->s; 700 } 701 } 702 } 703 #endif 704 #endif 705 706 /* 707 * Read mount.fstab file(s), and treat each line as its own mount 708 * parameter. 709 */ 710 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 711 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 712 if (s->len == 0) 713 continue; 714 f = fopen(s->s, "r"); 715 if (f == NULL) { 716 jail_warnx(j, "mount.fstab: %s: %s", 717 s->s, strerror(errno)); 718 error = -1; 719 continue; 720 } 721 while ((ln = fgetln(f, &lnlen))) { 722 if ((cs = memchr(ln, '#', lnlen - 1))) 723 lnlen = cs - ln + 1; 724 if (ln[lnlen - 1] == '\n' || 725 ln[lnlen - 1] == '#') 726 ln[lnlen - 1] = '\0'; 727 else { 728 cs = alloca(lnlen + 1); 729 strlcpy(cs, ln, lnlen + 1); 730 ln = cs; 731 } 732 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 733 } 734 fclose(f); 735 } 736 } 737 if (error) 738 failed(j); 739 return error; 740 } 741 742 /* 743 * Import parameters into libjail's binary jailparam format. 744 */ 745 int 746 import_params(struct cfjail *j) 747 { 748 struct cfparam *p; 749 struct cfstring *s, *ts; 750 struct jailparam *jp; 751 char *value, *cs; 752 size_t vallen; 753 int error; 754 755 error = 0; 756 j->njp = 0; 757 TAILQ_FOREACH(p, &j->params, tq) 758 if (!(p->flags & PF_INTERNAL)) 759 j->njp++; 760 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 761 TAILQ_FOREACH(p, &j->params, tq) { 762 if (p->flags & PF_INTERNAL) 763 continue; 764 if (jailparam_init(jp, p->name) < 0) { 765 error = -1; 766 jail_warnx(j, "%s", jail_errmsg); 767 jp++; 768 continue; 769 } 770 if (TAILQ_EMPTY(&p->val)) 771 value = NULL; 772 else if (!jp->jp_elemlen || 773 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 774 /* 775 * Scalar parameters silently discard multiple (array) 776 * values, keeping only the last value added. This 777 * lets values added from the command line append to 778 * arrays wthout pre-checking the type. 779 */ 780 value = TAILQ_LAST(&p->val, cfstrings)->s; 781 } else { 782 /* 783 * Convert arrays into comma-separated strings, which 784 * jailparam_import will then convert back into arrays. 785 */ 786 vallen = 0; 787 TAILQ_FOREACH(s, &p->val, tq) 788 vallen += s->len + 1; 789 value = alloca(vallen); 790 cs = value; 791 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 792 memcpy(cs, s->s, s->len); 793 cs += s->len + 1; 794 cs[-1] = ','; 795 } 796 value[vallen - 1] = '\0'; 797 } 798 if (jailparam_import(jp, value) < 0) { 799 error = -1; 800 jail_warnx(j, "%s", jail_errmsg); 801 } 802 jp++; 803 } 804 if (error) { 805 jailparam_free(j->jp, j->njp); 806 free(j->jp); 807 j->jp = NULL; 808 failed(j); 809 } 810 return error; 811 } 812 813 /* 814 * Check if options are equal (with or without the "no" prefix). 815 */ 816 int 817 equalopts(const char *opt1, const char *opt2) 818 { 819 char *p; 820 821 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 822 if (strcmp(opt1, opt2) == 0) 823 return (1); 824 /* "noopt" vs. "opt" */ 825 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 826 return (1); 827 /* "opt" vs. "noopt" */ 828 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 829 return (1); 830 while ((p = strchr(opt1, '.')) != NULL && 831 !strncmp(opt1, opt2, ++p - opt1)) { 832 opt2 += p - opt1; 833 opt1 = p; 834 /* "foo.noopt" vs. "foo.opt" */ 835 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 836 return (1); 837 /* "foo.opt" vs. "foo.noopt" */ 838 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 839 return (1); 840 } 841 return (0); 842 } 843 844 /* 845 * See if a jail name matches a wildcard. 846 */ 847 int 848 wild_jail_match(const char *jname, const char *wname) 849 { 850 const char *jc, *jd, *wc, *wd; 851 852 /* 853 * A non-final "*" component in the wild name matches a single jail 854 * component, and a final "*" matches one or more jail components. 855 */ 856 for (jc = jname, wc = wname; 857 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 858 jc = jd + 1, wc = wd + 1) 859 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 860 return 0; 861 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 862 } 863 864 /* 865 * Return if a jail name is a wildcard. 866 */ 867 int 868 wild_jail_name(const char *wname) 869 { 870 const char *wc; 871 872 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 873 if ((wc == wname || wc[-1] == '.') && 874 (wc[1] == '\0' || wc[1] == '.')) 875 return 1; 876 return 0; 877 } 878 879 /* 880 * Free a parameter record and all its strings and variables. 881 */ 882 static void 883 free_param(struct cfparams *pp, struct cfparam *p) 884 { 885 free(p->name); 886 free_param_strings(p); 887 TAILQ_REMOVE(pp, p, tq); 888 free(p); 889 } 890 891 void 892 free_param_strings(struct cfparam *p) 893 { 894 struct cfstring *s; 895 struct cfvar *v; 896 897 while ((s = TAILQ_FIRST(&p->val))) { 898 free(s->s); 899 while ((v = STAILQ_FIRST(&s->vars))) { 900 free(v->name); 901 STAILQ_REMOVE_HEAD(&s->vars, tq); 902 free(v); 903 } 904 TAILQ_REMOVE(&p->val, s, tq); 905 free(s); 906 } 907 } 908