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. After we 160 * collect other parameters, we'll go back and ensure they're 161 * both set if we need to do so here. 162 */ 163 add_param(j, NULL, 164 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 165 j->name); 166 167 /* 168 * Collect parameters for the jail, global parameters/variables, 169 * and any matching wildcard jails. 170 */ 171 did_self = 0; 172 TAILQ_FOREACH(wj, &wild, tq) { 173 if (j->seq < wj->seq && !did_self) { 174 TAILQ_FOREACH(p, &opp, tq) 175 add_param(j, p, 0, NULL); 176 did_self = 1; 177 } 178 if (wild_jail_match(j->name, wj->name)) 179 TAILQ_FOREACH(p, &wj->params, tq) 180 add_param(j, p, 0, NULL); 181 } 182 if (!did_self) 183 TAILQ_FOREACH(p, &opp, tq) 184 add_param(j, p, 0, NULL); 185 186 /* 187 * We only backfill if it's the name that wasn't set; if it was 188 * the jid, we can assume that will be populated later when the 189 * jail is created or found. 190 */ 191 if (j->intparams[KP_NAME] == NULL) 192 add_param(j, j->intparams[KP_JID], KP_NAME, NULL); 193 194 /* Resolve any variable substitutions. */ 195 pgen = 0; 196 TAILQ_FOREACH(p, &j->params, tq) { 197 p->gen = ++pgen; 198 find_vars: 199 TAILQ_FOREACH(s, &p->val, tq) { 200 while ((v = STAILQ_FIRST(&s->vars))) { 201 TAILQ_FOREACH(vp, &j->params, tq) 202 if (!strcmp(vp->name, v->name)) 203 break; 204 if (!vp || TAILQ_EMPTY(&vp->val)) { 205 jail_warnx(j, 206 "%s: variable \"%s\" not found", 207 p->name, v->name); 208 bad_var: 209 j->flags |= JF_FAILED; 210 TAILQ_FOREACH(vp, &j->params, tq) 211 if (vp->gen == pgen) 212 vp->flags |= PF_BAD; 213 goto free_var; 214 } 215 if (vp->flags & PF_BAD) 216 goto bad_var; 217 if (vp->gen == pgen) { 218 jail_warnx(j, "%s: variable loop", 219 v->name); 220 goto bad_var; 221 } 222 TAILQ_FOREACH(vs, &vp->val, tq) 223 if (!STAILQ_EMPTY(&vs->vars)) { 224 vp->gen = pgen; 225 TAILQ_REMOVE(&j->params, vp, 226 tq); 227 TAILQ_INSERT_BEFORE(p, vp, tq); 228 p = vp; 229 goto find_vars; 230 } 231 vs = TAILQ_FIRST(&vp->val); 232 if (TAILQ_NEXT(vs, tq) != NULL && 233 (s->s[0] != '\0' || 234 STAILQ_NEXT(v, tq))) { 235 jail_warnx(j, "%s: array cannot be " 236 "substituted inline", 237 p->name); 238 goto bad_var; 239 } 240 s->s = erealloc(s->s, s->len + vs->len + 1); 241 memmove(s->s + v->pos + vs->len, 242 s->s + v->pos, 243 s->len - v->pos + 1); 244 memcpy(s->s + v->pos, vs->s, vs->len); 245 vv = v; 246 while ((vv = STAILQ_NEXT(vv, tq))) 247 vv->pos += vs->len; 248 s->len += vs->len; 249 while ((vs = TAILQ_NEXT(vs, tq))) { 250 ns = emalloc(sizeof(struct cfstring)); 251 ns->s = estrdup(vs->s); 252 ns->len = vs->len; 253 STAILQ_INIT(&ns->vars); 254 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 255 s = ns; 256 } 257 free_var: 258 free(v->name); 259 STAILQ_REMOVE_HEAD(&s->vars, tq); 260 free(v); 261 } 262 } 263 } 264 265 /* Free the jail's original parameter list and any variables. */ 266 while ((p = TAILQ_FIRST(&opp))) 267 free_param(&opp, p); 268 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 269 if (p->flags & PF_VAR) 270 free_param(&j->params, p); 271 } 272 while ((wj = TAILQ_FIRST(&wild))) { 273 free(wj->name); 274 while ((p = TAILQ_FIRST(&wj->params))) 275 free_param(&wj->params, p); 276 TAILQ_REMOVE(&wild, wj, tq); 277 } 278 } 279 280 void 281 include_config(void *scanner, const char *cfname) 282 { 283 static unsigned int depth; 284 glob_t g = {0}; 285 const char *slash; 286 char *fullpath = NULL; 287 288 /* Simple sanity check for include loops. */ 289 if (++depth > MAX_INCLUDE_DEPTH) 290 errx(1, "maximum include depth exceeded"); 291 /* Base relative pathnames on the current config file. */ 292 if (yyget_in(scanner) != stdin && cfname[0] != '/') { 293 const char *outer_cfname = yyget_extra(scanner)->cfname; 294 if ((slash = strrchr(outer_cfname, '/')) != NULL) { 295 size_t dirlen = (slash - outer_cfname) + 1; 296 297 fullpath = emalloc(dirlen + strlen(cfname) + 1); 298 strncpy(fullpath, outer_cfname, dirlen); 299 strcpy(fullpath + dirlen, cfname); 300 cfname = fullpath; 301 } 302 } 303 /* 304 * Check if the include statement had a filename glob. 305 * Globbing doesn't need to catch any files, but a non-glob 306 * file needs to exist (enforced by parse_config). 307 */ 308 if (glob(cfname, GLOB_NOCHECK, NULL, &g) != 0) 309 errx(1, "%s: filename glob failed", cfname); 310 if (g.gl_flags & GLOB_MAGCHAR) { 311 for (size_t gi = 0; gi < g.gl_matchc; gi++) 312 parse_config(g.gl_pathv[gi], 0); 313 } else 314 parse_config(cfname, 0); 315 if (fullpath) 316 free(fullpath); 317 --depth; 318 } 319 320 static void 321 parse_config(const char *cfname, int is_stdin) 322 { 323 struct cflex cflex = {.cfname = cfname, .error = 0}; 324 void *scanner; 325 326 yylex_init_extra(&cflex, &scanner); 327 if (is_stdin) { 328 cflex.cfname = "STDIN"; 329 yyset_in(stdin, scanner); 330 } else { 331 FILE *yfp = fopen(cfname, "r"); 332 if (!yfp) 333 err(1, "%s", cfname); 334 yyset_in(yfp, scanner); 335 } 336 if (yyparse(scanner) || cflex.error) 337 exit(1); 338 yylex_destroy(scanner); 339 } 340 341 /* 342 * Create a new jail record. 343 */ 344 struct cfjail * 345 add_jail(void) 346 { 347 struct cfjail *j; 348 349 j = emalloc(sizeof(struct cfjail)); 350 memset(j, 0, sizeof(struct cfjail)); 351 TAILQ_INIT(&j->params); 352 STAILQ_INIT(&j->dep[DEP_FROM]); 353 STAILQ_INIT(&j->dep[DEP_TO]); 354 j->queue = &cfjails; 355 TAILQ_INSERT_TAIL(&cfjails, j, tq); 356 return j; 357 } 358 359 /* 360 * Add a parameter to a jail. 361 */ 362 void 363 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 364 const char *value) 365 { 366 struct cfstrings nss; 367 struct cfparam *dp, *np; 368 struct cfstring *s, *ns; 369 struct cfvar *v, *nv; 370 const char *name; 371 char *cs, *tname; 372 unsigned flags; 373 374 if (j == NULL) { 375 /* Create a single anonymous jail if one doesn't yet exist. */ 376 j = TAILQ_LAST(&cfjails, cfjails); 377 if (j == NULL) 378 j = add_jail(); 379 } 380 TAILQ_INIT(&nss); 381 if (p != NULL) { 382 name = p->name; 383 flags = p->flags; 384 /* 385 * Make a copy of the parameter's string list, 386 * which may be freed if it's overridden later. 387 */ 388 TAILQ_FOREACH(s, &p->val, tq) { 389 ns = emalloc(sizeof(struct cfstring)); 390 ns->s = estrdup(s->s); 391 ns->len = s->len; 392 STAILQ_INIT(&ns->vars); 393 STAILQ_FOREACH(v, &s->vars, tq) { 394 nv = emalloc(sizeof(struct cfvar)); 395 nv->name = strdup(v->name); 396 nv->pos = v->pos; 397 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 398 } 399 TAILQ_INSERT_TAIL(&nss, ns, tq); 400 } 401 } else { 402 flags = PF_APPEND; 403 if (ipnum != IP__NULL) { 404 name = intparams[ipnum].name; 405 flags |= intparams[ipnum].flags; 406 } else if ((cs = strchr(value, '='))) { 407 tname = alloca(cs - value + 1); 408 strlcpy(tname, value, cs - value + 1); 409 name = tname; 410 value = cs + 1; 411 } else { 412 name = value; 413 value = NULL; 414 } 415 if (value != NULL) { 416 ns = emalloc(sizeof(struct cfstring)); 417 ns->s = estrdup(value); 418 ns->len = strlen(value); 419 STAILQ_INIT(&ns->vars); 420 TAILQ_INSERT_TAIL(&nss, ns, tq); 421 } 422 } 423 424 /* See if this parameter has already been added. */ 425 if (ipnum != IP__NULL) 426 dp = j->intparams[ipnum]; 427 else 428 TAILQ_FOREACH(dp, &j->params, tq) 429 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 430 break; 431 if (dp != NULL) { 432 /* Found it - append or replace. */ 433 if ((flags ^ dp->flags) & PF_VAR) { 434 jail_warnx(j, "variable \"$%s\" cannot have the same " 435 "name as a parameter.", name); 436 j->flags |= JF_FAILED; 437 return; 438 } 439 if (dp->flags & PF_IMMUTABLE) { 440 jail_warnx(j, "cannot redefine parameter \"%s\".", 441 dp->name); 442 j->flags |= JF_FAILED; 443 return; 444 } 445 if (strcmp(dp->name, name)) { 446 free(dp->name); 447 dp->name = estrdup(name); 448 } 449 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 450 free_param_strings(dp); 451 TAILQ_CONCAT(&dp->val, &nss, tq); 452 dp->flags |= flags; 453 } else { 454 /* Not found - add it. */ 455 np = emalloc(sizeof(struct cfparam)); 456 np->name = estrdup(name); 457 TAILQ_INIT(&np->val); 458 TAILQ_CONCAT(&np->val, &nss, tq); 459 np->flags = flags; 460 np->gen = 0; 461 TAILQ_INSERT_TAIL(&j->params, np, tq); 462 if (ipnum != IP__NULL) 463 j->intparams[ipnum] = np; 464 else 465 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 466 if (!(intparams[ipnum].flags & PF_CONV) && 467 equalopts(name, intparams[ipnum].name)) { 468 if (flags & PF_VAR) { 469 jail_warnx(j, 470 "variable \"$%s\" " 471 "cannot have the same " 472 "name as a parameter.", 473 name); 474 j->flags |= JF_FAILED; 475 return; 476 } 477 j->intparams[ipnum] = np; 478 np->flags |= intparams[ipnum].flags; 479 break; 480 } 481 } 482 } 483 484 /* 485 * Return if a boolean parameter exists and is true. 486 */ 487 int 488 bool_param(const struct cfparam *p) 489 { 490 const char *cs; 491 492 if (p == NULL) 493 return 0; 494 cs = strrchr(p->name, '.'); 495 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 496 (TAILQ_EMPTY(&p->val) || 497 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 498 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 499 } 500 501 /* 502 * Set an integer if a parameter if it exists. 503 */ 504 int 505 int_param(const struct cfparam *p, int *ip) 506 { 507 if (p == NULL || TAILQ_EMPTY(&p->val)) 508 return 0; 509 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 510 return 1; 511 } 512 513 /* 514 * Return the string value of a scalar parameter if it exists. 515 */ 516 const char * 517 string_param(const struct cfparam *p) 518 { 519 return (p && !TAILQ_EMPTY(&p->val) 520 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 521 } 522 523 /* 524 * Check syntax and values of internal parameters. Set some internal 525 * parameters based on the values of others. 526 */ 527 int 528 check_intparams(struct cfjail *j) 529 { 530 struct cfparam *p; 531 struct cfstring *s; 532 FILE *f; 533 const char *val; 534 char *cs, *ep, *ln; 535 size_t lnlen; 536 int error; 537 #if defined(INET) || defined(INET6) 538 struct addrinfo hints; 539 struct addrinfo *ai0, *ai; 540 const char *hostname; 541 int gicode, defif; 542 #endif 543 #ifdef INET 544 struct in_addr addr4; 545 int ip4ok; 546 char avalue4[INET_ADDRSTRLEN]; 547 #endif 548 #ifdef INET6 549 struct in6_addr addr6; 550 int ip6ok; 551 char avalue6[INET6_ADDRSTRLEN]; 552 #endif 553 554 error = 0; 555 /* Check format of boolan and integer values. */ 556 TAILQ_FOREACH(p, &j->params, tq) { 557 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 558 val = TAILQ_LAST(&p->val, cfstrings)->s; 559 if (p->flags & PF_BOOL) { 560 if (strcasecmp(val, "false") && 561 strcasecmp(val, "true") && 562 ((void)strtol(val, &ep, 10), *ep)) { 563 jail_warnx(j, 564 "%s: unknown boolean value \"%s\"", 565 p->name, val); 566 error = -1; 567 } 568 } else { 569 (void)strtol(val, &ep, 10); 570 if (ep == val || *ep) { 571 jail_warnx(j, 572 "%s: non-integer value \"%s\"", 573 p->name, val); 574 error = -1; 575 } 576 } 577 } 578 } 579 580 #if defined(INET) || defined(INET6) 581 /* 582 * The ip_hostname parameter looks up the hostname, and adds parameters 583 * for any IP addresses it finds. 584 */ 585 if (((j->flags & JF_OP_MASK) != JF_STOP || 586 j->intparams[IP_INTERFACE] != NULL) && 587 bool_param(j->intparams[IP_IP_HOSTNAME]) && 588 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 589 j->intparams[IP_IP_HOSTNAME] = NULL; 590 /* 591 * Silently ignore unsupported address families from 592 * DNS lookups. 593 */ 594 #ifdef INET 595 ip4ok = feature_present("inet"); 596 #endif 597 #ifdef INET6 598 ip6ok = feature_present("inet6"); 599 #endif 600 if ( 601 #if defined(INET) && defined(INET6) 602 ip4ok || ip6ok 603 #elif defined(INET) 604 ip4ok 605 #elif defined(INET6) 606 ip6ok 607 #endif 608 ) { 609 /* Look up the hostname (or get the address) */ 610 memset(&hints, 0, sizeof(hints)); 611 hints.ai_socktype = SOCK_STREAM; 612 hints.ai_family = 613 #if defined(INET) && defined(INET6) 614 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 615 #elif defined(INET) 616 PF_INET; 617 #elif defined(INET6) 618 PF_INET6; 619 #endif 620 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 621 if (gicode != 0) { 622 jail_warnx(j, "host.hostname %s: %s", hostname, 623 gai_strerror(gicode)); 624 error = -1; 625 } else { 626 /* 627 * Convert the addresses to ASCII so jailparam 628 * can convert them back. Errors are not 629 * expected here. 630 */ 631 for (ai = ai0; ai; ai = ai->ai_next) 632 switch (ai->ai_family) { 633 #ifdef INET 634 case AF_INET: 635 memcpy(&addr4, 636 &((struct sockaddr_in *) 637 (void *)ai->ai_addr)-> 638 sin_addr, sizeof(addr4)); 639 if (inet_ntop(AF_INET, 640 &addr4, avalue4, 641 INET_ADDRSTRLEN) == NULL) 642 err(1, "inet_ntop"); 643 add_param(j, NULL, KP_IP4_ADDR, 644 avalue4); 645 break; 646 #endif 647 #ifdef INET6 648 case AF_INET6: 649 memcpy(&addr6, 650 &((struct sockaddr_in6 *) 651 (void *)ai->ai_addr)-> 652 sin6_addr, sizeof(addr6)); 653 if (inet_ntop(AF_INET6, 654 &addr6, avalue6, 655 INET6_ADDRSTRLEN) == NULL) 656 err(1, "inet_ntop"); 657 add_param(j, NULL, KP_IP6_ADDR, 658 avalue6); 659 break; 660 #endif 661 } 662 freeaddrinfo(ai0); 663 } 664 } 665 } 666 667 /* 668 * IP addresses may include an interface to set that address on, 669 * a netmask/suffix for that address and options for ifconfig. 670 * These are copied to an internal command parameter and then stripped 671 * so they won't be passed on to jailparam_set. 672 */ 673 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 674 #ifdef INET 675 if (j->intparams[KP_IP4_ADDR] != NULL) { 676 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 677 cs = strchr(s->s, '|'); 678 if (cs || defif) 679 add_param(j, NULL, IP__IP4_IFADDR, s->s); 680 if (cs) { 681 s->len -= cs + 1 - s->s; 682 memmove(s->s, cs + 1, s->len + 1); 683 } 684 if ((cs = strchr(s->s, '/')) != NULL) { 685 *cs = '\0'; 686 s->len = cs - s->s; 687 } 688 if ((cs = strchr(s->s, ' ')) != NULL) { 689 *cs = '\0'; 690 s->len = cs - s->s; 691 } 692 } 693 } 694 #endif 695 #ifdef INET6 696 if (j->intparams[KP_IP6_ADDR] != NULL) { 697 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 698 cs = strchr(s->s, '|'); 699 if (cs || defif) 700 add_param(j, NULL, IP__IP6_IFADDR, s->s); 701 if (cs) { 702 s->len -= cs + 1 - s->s; 703 memmove(s->s, cs + 1, s->len + 1); 704 } 705 if ((cs = strchr(s->s, '/')) != NULL) { 706 *cs = '\0'; 707 s->len = cs - s->s; 708 } 709 if ((cs = strchr(s->s, ' ')) != NULL) { 710 *cs = '\0'; 711 s->len = cs - s->s; 712 } 713 } 714 } 715 #endif 716 #endif 717 718 /* 719 * Read mount.fstab file(s), and treat each line as its own mount 720 * parameter. 721 */ 722 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 723 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 724 if (s->len == 0) 725 continue; 726 f = fopen(s->s, "r"); 727 if (f == NULL) { 728 jail_warnx(j, "mount.fstab: %s: %s", 729 s->s, strerror(errno)); 730 error = -1; 731 continue; 732 } 733 while ((ln = fgetln(f, &lnlen))) { 734 if ((cs = memchr(ln, '#', lnlen - 1))) 735 lnlen = cs - ln + 1; 736 if (ln[lnlen - 1] == '\n' || 737 ln[lnlen - 1] == '#') 738 ln[lnlen - 1] = '\0'; 739 else { 740 cs = alloca(lnlen + 1); 741 strlcpy(cs, ln, lnlen + 1); 742 ln = cs; 743 } 744 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 745 } 746 fclose(f); 747 } 748 } 749 if (error) 750 failed(j); 751 return error; 752 } 753 754 /* 755 * Import parameters into libjail's binary jailparam format. 756 */ 757 int 758 import_params(struct cfjail *j) 759 { 760 struct cfparam *p; 761 struct cfstring *s, *ts; 762 struct jailparam *jp; 763 char *value, *cs; 764 size_t vallen; 765 int error; 766 767 error = 0; 768 j->njp = 0; 769 TAILQ_FOREACH(p, &j->params, tq) 770 if (!(p->flags & PF_INTERNAL)) 771 j->njp++; 772 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 773 TAILQ_FOREACH(p, &j->params, tq) { 774 if (p->flags & PF_INTERNAL) 775 continue; 776 if (jailparam_init(jp, p->name) < 0) { 777 error = -1; 778 jail_warnx(j, "%s", jail_errmsg); 779 jp++; 780 continue; 781 } 782 if (TAILQ_EMPTY(&p->val)) 783 value = NULL; 784 else if (!jp->jp_elemlen || 785 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 786 /* 787 * Scalar parameters silently discard multiple (array) 788 * values, keeping only the last value added. This 789 * lets values added from the command line append to 790 * arrays wthout pre-checking the type. 791 */ 792 value = TAILQ_LAST(&p->val, cfstrings)->s; 793 } else { 794 /* 795 * Convert arrays into comma-separated strings, which 796 * jailparam_import will then convert back into arrays. 797 */ 798 vallen = 0; 799 TAILQ_FOREACH(s, &p->val, tq) 800 vallen += s->len + 1; 801 value = alloca(vallen); 802 cs = value; 803 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 804 memcpy(cs, s->s, s->len); 805 cs += s->len + 1; 806 cs[-1] = ','; 807 } 808 value[vallen - 1] = '\0'; 809 } 810 if (jailparam_import(jp, value) < 0) { 811 error = -1; 812 jail_warnx(j, "%s", jail_errmsg); 813 } 814 jp++; 815 } 816 if (error) { 817 jailparam_free(j->jp, j->njp); 818 free(j->jp); 819 j->jp = NULL; 820 failed(j); 821 } 822 return error; 823 } 824 825 /* 826 * Check if options are equal (with or without the "no" prefix). 827 */ 828 int 829 equalopts(const char *opt1, const char *opt2) 830 { 831 char *p; 832 833 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 834 if (strcmp(opt1, opt2) == 0) 835 return (1); 836 /* "noopt" vs. "opt" */ 837 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 838 return (1); 839 /* "opt" vs. "noopt" */ 840 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 841 return (1); 842 while ((p = strchr(opt1, '.')) != NULL && 843 !strncmp(opt1, opt2, ++p - opt1)) { 844 opt2 += p - opt1; 845 opt1 = p; 846 /* "foo.noopt" vs. "foo.opt" */ 847 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 848 return (1); 849 /* "foo.opt" vs. "foo.noopt" */ 850 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 851 return (1); 852 } 853 return (0); 854 } 855 856 /* 857 * See if a jail name matches a wildcard. 858 */ 859 int 860 wild_jail_match(const char *jname, const char *wname) 861 { 862 const char *jc, *jd, *wc, *wd; 863 864 /* 865 * A non-final "*" component in the wild name matches a single jail 866 * component, and a final "*" matches one or more jail components. 867 */ 868 for (jc = jname, wc = wname; 869 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 870 jc = jd + 1, wc = wd + 1) 871 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 872 return 0; 873 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 874 } 875 876 /* 877 * Return if a jail name is a wildcard. 878 */ 879 int 880 wild_jail_name(const char *wname) 881 { 882 const char *wc; 883 884 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 885 if ((wc == wname || wc[-1] == '.') && 886 (wc[1] == '\0' || wc[1] == '.')) 887 return 1; 888 return 0; 889 } 890 891 /* 892 * Free a parameter record and all its strings and variables. 893 */ 894 static void 895 free_param(struct cfparams *pp, struct cfparam *p) 896 { 897 free(p->name); 898 free_param_strings(p); 899 TAILQ_REMOVE(pp, p, tq); 900 free(p); 901 } 902 903 void 904 free_param_strings(struct cfparam *p) 905 { 906 struct cfstring *s; 907 struct cfvar *v; 908 909 while ((s = TAILQ_FIRST(&p->val))) { 910 free(s->s); 911 while ((v = STAILQ_FIRST(&s->vars))) { 912 free(v->name); 913 STAILQ_REMOVE_HEAD(&s->vars, tq); 914 free(v); 915 } 916 TAILQ_REMOVE(&p->val, s, tq); 917 free(s); 918 } 919 } 920