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 [IP_ZFS_DATASET] = {"zfs.dataset", PF_INTERNAL}, 97 #ifdef INET 98 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV}, 99 #endif 100 #ifdef INET6 101 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV}, 102 #endif 103 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV}, 104 [IP__OP] = {NULL, PF_CONV}, 105 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 106 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 107 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 108 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 109 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 110 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 111 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0}, 112 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 113 #ifdef INET 114 [KP_IP4_ADDR] = {"ip4.addr", 0}, 115 #endif 116 #ifdef INET6 117 [KP_IP6_ADDR] = {"ip6.addr", 0}, 118 #endif 119 [KP_JID] = {"jid", PF_IMMUTABLE}, 120 [KP_NAME] = {"name", PF_IMMUTABLE}, 121 [KP_PATH] = {"path", 0}, 122 [KP_PERSIST] = {"persist", 0}, 123 [KP_SECURELEVEL] = {"securelevel", 0}, 124 [KP_VNET] = {"vnet", 0}, 125 }; 126 127 /* 128 * Parse the jail configuration file. 129 */ 130 void 131 load_config(const char *cfname) 132 { 133 struct cfjails wild; 134 struct cfparams opp; 135 struct cfjail *j, *tj, *wj; 136 struct cfparam *p, *vp, *tp; 137 struct cfstring *s, *vs, *ns; 138 struct cfvar *v, *vv; 139 char *ep; 140 int did_self, jseq, pgen; 141 142 parse_config(cfname, !strcmp(cfname, "-")); 143 144 /* Separate the wildcard jails out from the actual jails. */ 145 jseq = 0; 146 TAILQ_INIT(&wild); 147 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 148 j->seq = ++jseq; 149 if (wild_jail_name(j->name)) 150 requeue(j, &wild); 151 } 152 153 TAILQ_FOREACH(j, &cfjails, tq) { 154 /* Set aside the jail's parameters. */ 155 TAILQ_INIT(&opp); 156 TAILQ_CONCAT(&opp, &j->params, tq); 157 /* 158 * The jail name implies its "name" or "jid" parameter, 159 * though they may also be explicitly set later on. 160 */ 161 add_param(j, NULL, 162 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 163 j->name); 164 /* 165 * Collect parameters for the jail, global parameters/variables, 166 * and any matching wildcard jails. 167 */ 168 did_self = 0; 169 TAILQ_FOREACH(wj, &wild, tq) { 170 if (j->seq < wj->seq && !did_self) { 171 TAILQ_FOREACH(p, &opp, tq) 172 add_param(j, p, 0, NULL); 173 did_self = 1; 174 } 175 if (wild_jail_match(j->name, wj->name)) 176 TAILQ_FOREACH(p, &wj->params, tq) 177 add_param(j, p, 0, NULL); 178 } 179 if (!did_self) 180 TAILQ_FOREACH(p, &opp, tq) 181 add_param(j, p, 0, NULL); 182 183 /* Resolve any variable substitutions. */ 184 pgen = 0; 185 TAILQ_FOREACH(p, &j->params, tq) { 186 p->gen = ++pgen; 187 find_vars: 188 TAILQ_FOREACH(s, &p->val, tq) { 189 while ((v = STAILQ_FIRST(&s->vars))) { 190 TAILQ_FOREACH(vp, &j->params, tq) 191 if (!strcmp(vp->name, v->name)) 192 break; 193 if (!vp || TAILQ_EMPTY(&vp->val)) { 194 jail_warnx(j, 195 "%s: variable \"%s\" not found", 196 p->name, v->name); 197 bad_var: 198 j->flags |= JF_FAILED; 199 TAILQ_FOREACH(vp, &j->params, tq) 200 if (vp->gen == pgen) 201 vp->flags |= PF_BAD; 202 goto free_var; 203 } 204 if (vp->flags & PF_BAD) 205 goto bad_var; 206 if (vp->gen == pgen) { 207 jail_warnx(j, "%s: variable loop", 208 v->name); 209 goto bad_var; 210 } 211 TAILQ_FOREACH(vs, &vp->val, tq) 212 if (!STAILQ_EMPTY(&vs->vars)) { 213 vp->gen = pgen; 214 TAILQ_REMOVE(&j->params, vp, 215 tq); 216 TAILQ_INSERT_BEFORE(p, vp, tq); 217 p = vp; 218 goto find_vars; 219 } 220 vs = TAILQ_FIRST(&vp->val); 221 if (TAILQ_NEXT(vs, tq) != NULL && 222 (s->s[0] != '\0' || 223 STAILQ_NEXT(v, tq))) { 224 jail_warnx(j, "%s: array cannot be " 225 "substituted inline", 226 p->name); 227 goto bad_var; 228 } 229 s->s = erealloc(s->s, s->len + vs->len + 1); 230 memmove(s->s + v->pos + vs->len, 231 s->s + v->pos, 232 s->len - v->pos + 1); 233 memcpy(s->s + v->pos, vs->s, vs->len); 234 vv = v; 235 while ((vv = STAILQ_NEXT(vv, tq))) 236 vv->pos += vs->len; 237 s->len += vs->len; 238 while ((vs = TAILQ_NEXT(vs, tq))) { 239 ns = emalloc(sizeof(struct cfstring)); 240 ns->s = estrdup(vs->s); 241 ns->len = vs->len; 242 STAILQ_INIT(&ns->vars); 243 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 244 s = ns; 245 } 246 free_var: 247 free(v->name); 248 STAILQ_REMOVE_HEAD(&s->vars, tq); 249 free(v); 250 } 251 } 252 } 253 254 /* Free the jail's original parameter list and any variables. */ 255 while ((p = TAILQ_FIRST(&opp))) 256 free_param(&opp, p); 257 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 258 if (p->flags & PF_VAR) 259 free_param(&j->params, p); 260 } 261 while ((wj = TAILQ_FIRST(&wild))) { 262 free(wj->name); 263 while ((p = TAILQ_FIRST(&wj->params))) 264 free_param(&wj->params, p); 265 TAILQ_REMOVE(&wild, wj, tq); 266 } 267 } 268 269 void 270 include_config(void *scanner, const char *cfname) 271 { 272 static unsigned int depth; 273 glob_t g = {0}; 274 const char *slash; 275 char *fullpath = NULL; 276 277 /* Simple sanity check for include loops. */ 278 if (++depth > MAX_INCLUDE_DEPTH) 279 errx(1, "maximum include depth exceeded"); 280 /* Base relative pathnames on the current config file. */ 281 if (yyget_in(scanner) != stdin && cfname[0] != '/') { 282 const char *outer_cfname = yyget_extra(scanner)->cfname; 283 if ((slash = strrchr(outer_cfname, '/')) != NULL) { 284 size_t dirlen = (slash - outer_cfname) + 1; 285 286 fullpath = emalloc(dirlen + strlen(cfname) + 1); 287 strncpy(fullpath, outer_cfname, dirlen); 288 strcpy(fullpath + dirlen, cfname); 289 cfname = fullpath; 290 } 291 } 292 /* 293 * Check if the include statement had a filename glob. 294 * Globbing doesn't need to catch any files, but a non-glob 295 * file needs to exist (enforced by parse_config). 296 */ 297 if (glob(cfname, GLOB_NOCHECK, NULL, &g) != 0) 298 errx(1, "%s: filename glob failed", cfname); 299 if (g.gl_flags & GLOB_MAGCHAR) { 300 for (size_t gi = 0; gi < g.gl_matchc; gi++) 301 parse_config(g.gl_pathv[gi], 0); 302 } else 303 parse_config(cfname, 0); 304 if (fullpath) 305 free(fullpath); 306 --depth; 307 } 308 309 static void 310 parse_config(const char *cfname, int is_stdin) 311 { 312 struct cflex cflex = {.cfname = cfname, .error = 0}; 313 void *scanner; 314 315 yylex_init_extra(&cflex, &scanner); 316 if (is_stdin) { 317 cflex.cfname = "STDIN"; 318 yyset_in(stdin, scanner); 319 } else { 320 FILE *yfp = fopen(cfname, "r"); 321 if (!yfp) 322 err(1, "%s", cfname); 323 yyset_in(yfp, scanner); 324 } 325 if (yyparse(scanner) || cflex.error) 326 exit(1); 327 yylex_destroy(scanner); 328 } 329 330 /* 331 * Create a new jail record. 332 */ 333 struct cfjail * 334 add_jail(void) 335 { 336 struct cfjail *j; 337 338 j = emalloc(sizeof(struct cfjail)); 339 memset(j, 0, sizeof(struct cfjail)); 340 TAILQ_INIT(&j->params); 341 STAILQ_INIT(&j->dep[DEP_FROM]); 342 STAILQ_INIT(&j->dep[DEP_TO]); 343 j->queue = &cfjails; 344 TAILQ_INSERT_TAIL(&cfjails, j, tq); 345 return j; 346 } 347 348 /* 349 * Add a parameter to a jail. 350 */ 351 void 352 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 353 const char *value) 354 { 355 struct cfstrings nss; 356 struct cfparam *dp, *np; 357 struct cfstring *s, *ns; 358 struct cfvar *v, *nv; 359 const char *name; 360 char *cs, *tname; 361 unsigned flags; 362 363 if (j == NULL) { 364 /* Create a single anonymous jail if one doesn't yet exist. */ 365 j = TAILQ_LAST(&cfjails, cfjails); 366 if (j == NULL) 367 j = add_jail(); 368 } 369 TAILQ_INIT(&nss); 370 if (p != NULL) { 371 name = p->name; 372 flags = p->flags; 373 /* 374 * Make a copy of the parameter's string list, 375 * which may be freed if it's overridden later. 376 */ 377 TAILQ_FOREACH(s, &p->val, tq) { 378 ns = emalloc(sizeof(struct cfstring)); 379 ns->s = estrdup(s->s); 380 ns->len = s->len; 381 STAILQ_INIT(&ns->vars); 382 STAILQ_FOREACH(v, &s->vars, tq) { 383 nv = emalloc(sizeof(struct cfvar)); 384 nv->name = strdup(v->name); 385 nv->pos = v->pos; 386 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 387 } 388 TAILQ_INSERT_TAIL(&nss, ns, tq); 389 } 390 } else { 391 flags = PF_APPEND; 392 if (ipnum != IP__NULL) { 393 name = intparams[ipnum].name; 394 flags |= intparams[ipnum].flags; 395 } else if ((cs = strchr(value, '='))) { 396 tname = alloca(cs - value + 1); 397 strlcpy(tname, value, cs - value + 1); 398 name = tname; 399 value = cs + 1; 400 } else { 401 name = value; 402 value = NULL; 403 } 404 if (value != NULL) { 405 ns = emalloc(sizeof(struct cfstring)); 406 ns->s = estrdup(value); 407 ns->len = strlen(value); 408 STAILQ_INIT(&ns->vars); 409 TAILQ_INSERT_TAIL(&nss, ns, tq); 410 } 411 } 412 413 /* See if this parameter has already been added. */ 414 if (ipnum != IP__NULL) 415 dp = j->intparams[ipnum]; 416 else 417 TAILQ_FOREACH(dp, &j->params, tq) 418 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 419 break; 420 if (dp != NULL) { 421 /* Found it - append or replace. */ 422 if ((flags ^ dp->flags) & PF_VAR) { 423 jail_warnx(j, "variable \"$%s\" cannot have the same " 424 "name as a parameter.", name); 425 j->flags |= JF_FAILED; 426 return; 427 } 428 if (dp->flags & PF_IMMUTABLE) { 429 jail_warnx(j, "cannot redefine parameter \"%s\".", 430 dp->name); 431 j->flags |= JF_FAILED; 432 return; 433 } 434 if (strcmp(dp->name, name)) { 435 free(dp->name); 436 dp->name = estrdup(name); 437 } 438 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 439 free_param_strings(dp); 440 TAILQ_CONCAT(&dp->val, &nss, tq); 441 dp->flags |= flags; 442 } else { 443 /* Not found - add it. */ 444 np = emalloc(sizeof(struct cfparam)); 445 np->name = estrdup(name); 446 TAILQ_INIT(&np->val); 447 TAILQ_CONCAT(&np->val, &nss, tq); 448 np->flags = flags; 449 np->gen = 0; 450 TAILQ_INSERT_TAIL(&j->params, np, tq); 451 if (ipnum != IP__NULL) 452 j->intparams[ipnum] = np; 453 else 454 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 455 if (!(intparams[ipnum].flags & PF_CONV) && 456 equalopts(name, intparams[ipnum].name)) { 457 if (flags & PF_VAR) { 458 jail_warnx(j, 459 "variable \"$%s\" " 460 "cannot have the same " 461 "name as a parameter.", 462 name); 463 j->flags |= JF_FAILED; 464 return; 465 } 466 j->intparams[ipnum] = np; 467 np->flags |= intparams[ipnum].flags; 468 break; 469 } 470 } 471 } 472 473 /* 474 * Return if a boolean parameter exists and is true. 475 */ 476 int 477 bool_param(const struct cfparam *p) 478 { 479 const char *cs; 480 481 if (p == NULL) 482 return 0; 483 cs = strrchr(p->name, '.'); 484 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 485 (TAILQ_EMPTY(&p->val) || 486 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 487 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 488 } 489 490 /* 491 * Set an integer if a parameter if it exists. 492 */ 493 int 494 int_param(const struct cfparam *p, int *ip) 495 { 496 if (p == NULL || TAILQ_EMPTY(&p->val)) 497 return 0; 498 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 499 return 1; 500 } 501 502 /* 503 * Return the string value of a scalar parameter if it exists. 504 */ 505 const char * 506 string_param(const struct cfparam *p) 507 { 508 return (p && !TAILQ_EMPTY(&p->val) 509 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 510 } 511 512 /* 513 * Check syntax and values of internal parameters. Set some internal 514 * parameters based on the values of others. 515 */ 516 int 517 check_intparams(struct cfjail *j) 518 { 519 struct cfparam *p; 520 struct cfstring *s; 521 FILE *f; 522 const char *val; 523 char *cs, *ep, *ln; 524 size_t lnlen; 525 int error; 526 #if defined(INET) || defined(INET6) 527 struct addrinfo hints; 528 struct addrinfo *ai0, *ai; 529 const char *hostname; 530 int gicode, defif; 531 #endif 532 #ifdef INET 533 struct in_addr addr4; 534 int ip4ok; 535 char avalue4[INET_ADDRSTRLEN]; 536 #endif 537 #ifdef INET6 538 struct in6_addr addr6; 539 int ip6ok; 540 char avalue6[INET6_ADDRSTRLEN]; 541 #endif 542 543 error = 0; 544 /* Check format of boolan and integer values. */ 545 TAILQ_FOREACH(p, &j->params, tq) { 546 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 547 val = TAILQ_LAST(&p->val, cfstrings)->s; 548 if (p->flags & PF_BOOL) { 549 if (strcasecmp(val, "false") && 550 strcasecmp(val, "true") && 551 ((void)strtol(val, &ep, 10), *ep)) { 552 jail_warnx(j, 553 "%s: unknown boolean value \"%s\"", 554 p->name, val); 555 error = -1; 556 } 557 } else { 558 (void)strtol(val, &ep, 10); 559 if (ep == val || *ep) { 560 jail_warnx(j, 561 "%s: non-integer value \"%s\"", 562 p->name, val); 563 error = -1; 564 } 565 } 566 } 567 } 568 569 #if defined(INET) || defined(INET6) 570 /* 571 * The ip_hostname parameter looks up the hostname, and adds parameters 572 * for any IP addresses it finds. 573 */ 574 if (((j->flags & JF_OP_MASK) != JF_STOP || 575 j->intparams[IP_INTERFACE] != NULL) && 576 bool_param(j->intparams[IP_IP_HOSTNAME]) && 577 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 578 j->intparams[IP_IP_HOSTNAME] = NULL; 579 /* 580 * Silently ignore unsupported address families from 581 * DNS lookups. 582 */ 583 #ifdef INET 584 ip4ok = feature_present("inet"); 585 #endif 586 #ifdef INET6 587 ip6ok = feature_present("inet6"); 588 #endif 589 if ( 590 #if defined(INET) && defined(INET6) 591 ip4ok || ip6ok 592 #elif defined(INET) 593 ip4ok 594 #elif defined(INET6) 595 ip6ok 596 #endif 597 ) { 598 /* Look up the hostname (or get the address) */ 599 memset(&hints, 0, sizeof(hints)); 600 hints.ai_socktype = SOCK_STREAM; 601 hints.ai_family = 602 #if defined(INET) && defined(INET6) 603 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 604 #elif defined(INET) 605 PF_INET; 606 #elif defined(INET6) 607 PF_INET6; 608 #endif 609 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 610 if (gicode != 0) { 611 jail_warnx(j, "host.hostname %s: %s", hostname, 612 gai_strerror(gicode)); 613 error = -1; 614 } else { 615 /* 616 * Convert the addresses to ASCII so jailparam 617 * can convert them back. Errors are not 618 * expected here. 619 */ 620 for (ai = ai0; ai; ai = ai->ai_next) 621 switch (ai->ai_family) { 622 #ifdef INET 623 case AF_INET: 624 memcpy(&addr4, 625 &((struct sockaddr_in *) 626 (void *)ai->ai_addr)-> 627 sin_addr, sizeof(addr4)); 628 if (inet_ntop(AF_INET, 629 &addr4, avalue4, 630 INET_ADDRSTRLEN) == NULL) 631 err(1, "inet_ntop"); 632 add_param(j, NULL, KP_IP4_ADDR, 633 avalue4); 634 break; 635 #endif 636 #ifdef INET6 637 case AF_INET6: 638 memcpy(&addr6, 639 &((struct sockaddr_in6 *) 640 (void *)ai->ai_addr)-> 641 sin6_addr, sizeof(addr6)); 642 if (inet_ntop(AF_INET6, 643 &addr6, avalue6, 644 INET6_ADDRSTRLEN) == NULL) 645 err(1, "inet_ntop"); 646 add_param(j, NULL, KP_IP6_ADDR, 647 avalue6); 648 break; 649 #endif 650 } 651 freeaddrinfo(ai0); 652 } 653 } 654 } 655 656 /* 657 * IP addresses may include an interface to set that address on, 658 * a netmask/suffix for that address and options for ifconfig. 659 * These are copied to an internal command parameter and then stripped 660 * so they won't be passed on to jailparam_set. 661 */ 662 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 663 #ifdef INET 664 if (j->intparams[KP_IP4_ADDR] != NULL) { 665 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 666 cs = strchr(s->s, '|'); 667 if (cs || defif) 668 add_param(j, NULL, IP__IP4_IFADDR, s->s); 669 if (cs) { 670 s->len -= cs + 1 - s->s; 671 memmove(s->s, cs + 1, s->len + 1); 672 } 673 if ((cs = strchr(s->s, '/')) != NULL) { 674 *cs = '\0'; 675 s->len = cs - s->s; 676 } 677 if ((cs = strchr(s->s, ' ')) != NULL) { 678 *cs = '\0'; 679 s->len = cs - s->s; 680 } 681 } 682 } 683 #endif 684 #ifdef INET6 685 if (j->intparams[KP_IP6_ADDR] != NULL) { 686 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 687 cs = strchr(s->s, '|'); 688 if (cs || defif) 689 add_param(j, NULL, IP__IP6_IFADDR, s->s); 690 if (cs) { 691 s->len -= cs + 1 - s->s; 692 memmove(s->s, cs + 1, s->len + 1); 693 } 694 if ((cs = strchr(s->s, '/')) != NULL) { 695 *cs = '\0'; 696 s->len = cs - s->s; 697 } 698 if ((cs = strchr(s->s, ' ')) != NULL) { 699 *cs = '\0'; 700 s->len = cs - s->s; 701 } 702 } 703 } 704 #endif 705 #endif 706 707 /* 708 * Read mount.fstab file(s), and treat each line as its own mount 709 * parameter. 710 */ 711 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 712 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 713 if (s->len == 0) 714 continue; 715 f = fopen(s->s, "r"); 716 if (f == NULL) { 717 jail_warnx(j, "mount.fstab: %s: %s", 718 s->s, strerror(errno)); 719 error = -1; 720 continue; 721 } 722 while ((ln = fgetln(f, &lnlen))) { 723 if ((cs = memchr(ln, '#', lnlen - 1))) 724 lnlen = cs - ln + 1; 725 if (ln[lnlen - 1] == '\n' || 726 ln[lnlen - 1] == '#') 727 ln[lnlen - 1] = '\0'; 728 else { 729 cs = alloca(lnlen + 1); 730 strlcpy(cs, ln, lnlen + 1); 731 ln = cs; 732 } 733 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 734 } 735 fclose(f); 736 } 737 } 738 if (error) 739 failed(j); 740 return error; 741 } 742 743 /* 744 * Import parameters into libjail's binary jailparam format. 745 */ 746 int 747 import_params(struct cfjail *j) 748 { 749 struct cfparam *p; 750 struct cfstring *s, *ts; 751 struct jailparam *jp; 752 char *value, *cs; 753 size_t vallen; 754 int error; 755 756 error = 0; 757 j->njp = 0; 758 TAILQ_FOREACH(p, &j->params, tq) 759 if (!(p->flags & PF_INTERNAL)) 760 j->njp++; 761 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 762 TAILQ_FOREACH(p, &j->params, tq) { 763 if (p->flags & PF_INTERNAL) 764 continue; 765 if (jailparam_init(jp, p->name) < 0) { 766 error = -1; 767 jail_warnx(j, "%s", jail_errmsg); 768 jp++; 769 continue; 770 } 771 if (TAILQ_EMPTY(&p->val)) 772 value = NULL; 773 else if (!jp->jp_elemlen || 774 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 775 /* 776 * Scalar parameters silently discard multiple (array) 777 * values, keeping only the last value added. This 778 * lets values added from the command line append to 779 * arrays wthout pre-checking the type. 780 */ 781 value = TAILQ_LAST(&p->val, cfstrings)->s; 782 } else { 783 /* 784 * Convert arrays into comma-separated strings, which 785 * jailparam_import will then convert back into arrays. 786 */ 787 vallen = 0; 788 TAILQ_FOREACH(s, &p->val, tq) 789 vallen += s->len + 1; 790 value = alloca(vallen); 791 cs = value; 792 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 793 memcpy(cs, s->s, s->len); 794 cs += s->len + 1; 795 cs[-1] = ','; 796 } 797 value[vallen - 1] = '\0'; 798 } 799 if (jailparam_import(jp, value) < 0) { 800 error = -1; 801 jail_warnx(j, "%s", jail_errmsg); 802 } 803 jp++; 804 } 805 if (error) { 806 jailparam_free(j->jp, j->njp); 807 free(j->jp); 808 j->jp = NULL; 809 failed(j); 810 } 811 return error; 812 } 813 814 /* 815 * Check if options are equal (with or without the "no" prefix). 816 */ 817 int 818 equalopts(const char *opt1, const char *opt2) 819 { 820 char *p; 821 822 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 823 if (strcmp(opt1, opt2) == 0) 824 return (1); 825 /* "noopt" vs. "opt" */ 826 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 827 return (1); 828 /* "opt" vs. "noopt" */ 829 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 830 return (1); 831 while ((p = strchr(opt1, '.')) != NULL && 832 !strncmp(opt1, opt2, ++p - opt1)) { 833 opt2 += p - opt1; 834 opt1 = p; 835 /* "foo.noopt" vs. "foo.opt" */ 836 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 837 return (1); 838 /* "foo.opt" vs. "foo.noopt" */ 839 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 840 return (1); 841 } 842 return (0); 843 } 844 845 /* 846 * See if a jail name matches a wildcard. 847 */ 848 int 849 wild_jail_match(const char *jname, const char *wname) 850 { 851 const char *jc, *jd, *wc, *wd; 852 853 /* 854 * A non-final "*" component in the wild name matches a single jail 855 * component, and a final "*" matches one or more jail components. 856 */ 857 for (jc = jname, wc = wname; 858 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 859 jc = jd + 1, wc = wd + 1) 860 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 861 return 0; 862 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 863 } 864 865 /* 866 * Return if a jail name is a wildcard. 867 */ 868 int 869 wild_jail_name(const char *wname) 870 { 871 const char *wc; 872 873 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 874 if ((wc == wname || wc[-1] == '.') && 875 (wc[1] == '\0' || wc[1] == '.')) 876 return 1; 877 return 0; 878 } 879 880 /* 881 * Free a parameter record and all its strings and variables. 882 */ 883 static void 884 free_param(struct cfparams *pp, struct cfparam *p) 885 { 886 free(p->name); 887 free_param_strings(p); 888 TAILQ_REMOVE(pp, p, tq); 889 free(p); 890 } 891 892 void 893 free_param_strings(struct cfparam *p) 894 { 895 struct cfstring *s; 896 struct cfvar *v; 897 898 while ((s = TAILQ_FIRST(&p->val))) { 899 free(s->s); 900 while ((v = STAILQ_FIRST(&s->vars))) { 901 free(v->name); 902 STAILQ_REMOVE_HEAD(&s->vars, tq); 903 free(v); 904 } 905 TAILQ_REMOVE(&p->val, s, tq); 906 free(s); 907 } 908 } 909