config.c revision 223327
1274079Sngie/*- 2272343Sngie * Copyright (c) 2011 James Gritton 3272343Sngie * All rights reserved. 4272343Sngie * 5272343Sngie * Redistribution and use in source and binary forms, with or without 6272343Sngie * modification, are permitted provided that the following conditions 7272343Sngie * are met: 8272343Sngie * 1. Redistributions of source code must retain the above copyright 9272343Sngie * notice, this list of conditions and the following disclaimer. 10272343Sngie * 2. Redistributions in binary form must reproduce the above copyright 11272343Sngie * notice, this list of conditions and the following disclaimer in the 12272343Sngie * documentation and/or other materials provided with the distribution. 13272343Sngie * 14272343Sngie * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15272343Sngie * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16272343Sngie * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17272343Sngie * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18272343Sngie * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19272343Sngie * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20272343Sngie * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21272343Sngie * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22272343Sngie * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23272343Sngie * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24272343Sngie * SUCH DAMAGE. 25272343Sngie */ 26272343Sngie 27272343Sngie#include <sys/cdefs.h> 28272343Sngie__FBSDID("$FreeBSD: projects/jailconf/usr.sbin/jail/config.c 223327 2011-06-20 07:58:44Z jamie $"); 29272343Sngie 30272343Sngie#include <sys/types.h> 31272343Sngie#include <sys/errno.h> 32274079Sngie#include <sys/socket.h> 33272343Sngie#include <sys/sysctl.h> 34272343Sngie 35272343Sngie#include <arpa/inet.h> 36272343Sngie#include <netinet/in.h> 37272343Sngie 38272343Sngie#include <err.h> 39272343Sngie#include <netdb.h> 40272343Sngie#include <stdio.h> 41272343Sngie#include <stdlib.h> 42272343Sngie#include <string.h> 43272343Sngie 44272343Sngie#include "jailp.h" 45272343Sngie 46272343Sngiestruct ipspec { 47272343Sngie const char *name; 48272343Sngie unsigned flags; 49272343Sngie}; 50272343Sngie 51272343Sngieextern FILE *yyin; 52272343Sngieextern int yynerrs; 53272343Sngie 54272343Sngiestruct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 55272343Sngie 56272343Sngiestatic void free_param(struct cfparams *pp, struct cfparam *p); 57272343Sngiestatic void free_param_strings(struct cfparam *p); 58272343Sngie 59272343Sngiestatic const struct ipspec intparams[] = { 60272343Sngie [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL}, 61272343Sngie [IP_COMMAND] = {"command", PF_INTERNAL}, 62272343Sngie [IP_DEPEND] = {"depend", PF_INTERNAL}, 63272343Sngie [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL}, 64272343Sngie [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL}, 65272343Sngie [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT}, 66272343Sngie [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL}, 67272343Sngie [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL}, 68272343Sngie [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL}, 69272343Sngie [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL}, 70272343Sngie [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL}, 71272343Sngie [IP_EXEC_START] = {"exec.start", PF_INTERNAL}, 72272343Sngie [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL}, 73272343Sngie [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user", 74272343Sngie PF_INTERNAL | PF_BOOL}, 75272343Sngie [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL}, 76272343Sngie [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT}, 77272343Sngie [IP_INTERFACE] = {"interface", PF_INTERNAL}, 78272343Sngie [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL}, 79272343Sngie [IP_MOUNT] = {"mount", PF_INTERNAL}, 80272343Sngie [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL}, 81272343Sngie [IP_MOUNT_DEVFS_RULESET]= {"mount.devfs.ruleset", PF_INTERNAL}, 82272343Sngie [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 83272343Sngie [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 84272343Sngie [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 85272343Sngie [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV}, 86272343Sngie#ifdef INET6 87272343Sngie [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV}, 88272343Sngie#endif 89272343Sngie [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV}, 90272343Sngie [IP__OP] = {NULL, PF_CONV}, 91272343Sngie [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 92272343Sngie [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 93272343Sngie [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 94272343Sngie [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 95272343Sngie [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 96272343Sngie [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 97272343Sngie [KP_ENFORCE_STATFS] = {"enforce_statfs", 0}, 98272343Sngie [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 99272343Sngie [KP_IP4_ADDR] = {"ip4.addr", 0}, 100272343Sngie#ifdef INET6 101272343Sngie [KP_IP6_ADDR] = {"ip6.addr", 0}, 102272343Sngie#endif 103272343Sngie [KP_JID] = {"jid", 0}, 104272343Sngie [KP_NAME] = {"name", 0}, 105272343Sngie [KP_PATH] = {"path", 0}, 106272343Sngie [KP_PERSIST] = {"persist", 0}, 107272343Sngie [KP_SECURELEVEL] = {"securelevel", 0}, 108272343Sngie [KP_VNET] = {"vnet", 0}, 109272343Sngie}; 110272343Sngie 111272343Sngie/* 112272343Sngie * Parse the jail configuration file. 113272343Sngie */ 114272343Sngievoid 115272343Sngieload_config(void) 116272343Sngie{ 117272343Sngie struct cfjails wild; 118272343Sngie struct cfparams opp; 119272343Sngie struct cfjail *j, *tj, *wj; 120272343Sngie struct cfparam *p, *vp, *tp; 121272343Sngie struct cfstring *s, *vs, *ns; 122272343Sngie struct cfvar *v; 123272343Sngie char *ep; 124272343Sngie size_t varoff; 125272343Sngie int did_self, jseq, pgen; 126272343Sngie 127272343Sngie if (!strcmp(cfname, "-")) { 128272343Sngie cfname = "STDIN"; 129272343Sngie yyin = stdin; 130272343Sngie } else { 131272343Sngie yyin = fopen(cfname, "r"); 132272343Sngie if (!yyin) 133272343Sngie err(1, "%s", cfname); 134272343Sngie } 135272343Sngie if (yyparse() || yynerrs) 136272343Sngie exit(1); 137272343Sngie 138272343Sngie /* Separate the wildcard jails out from the actual jails. */ 139272343Sngie jseq = 0; 140272343Sngie TAILQ_INIT(&wild); 141272343Sngie TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 142272343Sngie j->seq = ++jseq; 143272343Sngie if (wild_jail_name(j->name)) 144272343Sngie requeue(j, &wild); 145272343Sngie } 146272343Sngie 147272343Sngie TAILQ_FOREACH(j, &cfjails, tq) { 148272343Sngie /* Set aside the jail's parameters. */ 149272343Sngie TAILQ_INIT(&opp); 150272343Sngie TAILQ_CONCAT(&opp, &j->params, tq); 151272343Sngie /* 152272343Sngie * The jail name implies its "name" or "jid" parameter, 153272343Sngie * though they may also be explicitly set later on. 154272343Sngie */ 155272343Sngie add_param(j, NULL, 156272343Sngie strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 157272343Sngie j->name); 158272343Sngie /* 159272343Sngie * Collect parameters for the jail, global parameters/variables, 160272343Sngie * and any matching wildcard jails. 161272343Sngie */ 162272343Sngie did_self = 0; 163272343Sngie TAILQ_FOREACH(wj, &wild, tq) { 164272343Sngie if (j->seq < wj->seq && !did_self) { 165272343Sngie TAILQ_FOREACH(p, &opp, tq) 166272343Sngie add_param(j, p, 0, NULL); 167272343Sngie did_self = 1; 168272343Sngie } 169272343Sngie if (wild_jail_match(j->name, wj->name)) 170272343Sngie TAILQ_FOREACH(p, &wj->params, tq) 171272343Sngie add_param(j, p, 0, NULL); 172272343Sngie } 173272343Sngie if (!did_self) 174272343Sngie TAILQ_FOREACH(p, &opp, tq) 175272343Sngie add_param(j, p, 0, NULL); 176272343Sngie 177272343Sngie /* Resolve any variable substitutions. */ 178272343Sngie pgen = 0; 179272343Sngie TAILQ_FOREACH(p, &j->params, tq) { 180272343Sngie p->gen = ++pgen; 181272343Sngie find_vars: 182272343Sngie TAILQ_FOREACH(s, &p->val, tq) { 183272343Sngie varoff = 0; 184272343Sngie while ((v = STAILQ_FIRST(&s->vars))) { 185272343Sngie TAILQ_FOREACH(vp, &j->params, tq) 186272343Sngie if (!strcmp(vp->name, v->name)) 187272343Sngie break; 188272343Sngie if (!vp) { 189272343Sngie jail_warnx(j, 190272343Sngie "%s: variable \"%s\" not found", 191272343Sngie p->name, v->name); 192272343Sngie bad_var: 193272343Sngie j->flags |= JF_FAILED; 194272343Sngie TAILQ_FOREACH(vp, &j->params, tq) 195272343Sngie if (vp->gen == pgen) 196272343Sngie vp->flags |= PF_BAD; 197272343Sngie goto free_var; 198272343Sngie } 199272343Sngie if (vp->flags & PF_BAD) 200272343Sngie goto bad_var; 201272343Sngie if (vp->gen == pgen) { 202272343Sngie jail_warnx(j, "%s: variable loop", 203272343Sngie v->name); 204272343Sngie goto bad_var; 205 } 206 TAILQ_FOREACH(vs, &vp->val, tq) 207 if (!STAILQ_EMPTY(&vs->vars)) { 208 vp->gen = pgen; 209 TAILQ_REMOVE(&j->params, vp, 210 tq); 211 TAILQ_INSERT_BEFORE(p, vp, tq); 212 p = vp; 213 goto find_vars; 214 } 215 vs = TAILQ_FIRST(&vp->val); 216 if (TAILQ_NEXT(vs, tq) != NULL && 217 (s->s[0] != '\0' || 218 STAILQ_NEXT(v, tq))) { 219 jail_warnx(j, "%s: array cannot be " 220 "substituted inline", 221 p->name); 222 goto bad_var; 223 } 224 s->s = erealloc(s->s, s->len + vs->len + 1); 225 memmove(s->s + v->pos + varoff + vs->len, 226 s->s + v->pos + varoff, 227 s->len - (v->pos + varoff) + 1); 228 memcpy(s->s + v->pos + varoff, vs->s, vs->len); 229 varoff += vs->len; 230 s->len += vs->len; 231 while ((vs = TAILQ_NEXT(vs, tq))) { 232 ns = emalloc(sizeof(struct cfstring)); 233 ns->s = estrdup(vs->s); 234 ns->len = vs->len; 235 STAILQ_INIT(&ns->vars); 236 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 237 s = ns; 238 } 239 free_var: 240 free(v->name); 241 STAILQ_REMOVE_HEAD(&s->vars, tq); 242 free(v); 243 } 244 } 245 } 246 247 /* Free the jail's original parameter list and any variables. */ 248 while ((p = TAILQ_FIRST(&opp))) 249 free_param(&opp, p); 250 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 251 if (p->flags & PF_VAR) 252 free_param(&j->params, p); 253 } 254 while ((wj = TAILQ_FIRST(&wild))) { 255 free(wj->name); 256 while ((p = TAILQ_FIRST(&wj->params))) 257 free_param(&wj->params, p); 258 TAILQ_REMOVE(&wild, wj, tq); 259 } 260} 261 262/* 263 * Create a new jail record. 264 */ 265struct cfjail * 266add_jail(void) 267{ 268 struct cfjail *j; 269 270 j = emalloc(sizeof(struct cfjail)); 271 memset(j, 0, sizeof(struct cfjail)); 272 TAILQ_INIT(&j->params); 273 STAILQ_INIT(&j->dep[DEP_FROM]); 274 STAILQ_INIT(&j->dep[DEP_TO]); 275 j->queue = &cfjails; 276 TAILQ_INSERT_TAIL(&cfjails, j, tq); 277 return j; 278} 279 280/* 281 * Add a parameter to a jail. 282 */ 283void 284add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 285 const char *value) 286{ 287 struct cfstrings nss; 288 struct cfparam *dp, *np; 289 struct cfstring *s, *ns; 290 struct cfvar *v, *nv; 291 const char *name; 292 char *cs, *tname; 293 unsigned flags; 294 295 if (j == NULL) { 296 /* Create a single anonymous jail if one doesn't yet exist. */ 297 j = TAILQ_LAST(&cfjails, cfjails); 298 if (j == NULL) 299 j = add_jail(); 300 } 301 TAILQ_INIT(&nss); 302 if (p != NULL) { 303 name = p->name; 304 flags = p->flags; 305 /* 306 * Make a copy of the parameter's string list, 307 * which may be freed if it's overridden later. 308 */ 309 TAILQ_FOREACH(s, &p->val, tq) { 310 ns = emalloc(sizeof(struct cfstring)); 311 ns->s = estrdup(s->s); 312 ns->len = s->len; 313 STAILQ_INIT(&ns->vars); 314 STAILQ_FOREACH(v, &s->vars, tq) { 315 nv = emalloc(sizeof(struct cfvar)); 316 nv->name = strdup(v->name); 317 nv->pos = v->pos; 318 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 319 } 320 TAILQ_INSERT_TAIL(&nss, ns, tq); 321 } 322 } else { 323 flags = PF_APPEND; 324 if (ipnum != 0) { 325 name = intparams[ipnum].name; 326 flags |= intparams[ipnum].flags; 327 } else if ((cs = strchr(value, '='))) { 328 tname = alloca(cs - value + 1); 329 strlcpy(tname, value, cs - value + 1); 330 name = tname; 331 value = cs + 1; 332 } else { 333 name = value; 334 value = NULL; 335 } 336 if (value != NULL) { 337 ns = emalloc(sizeof(struct cfstring)); 338 ns->s = estrdup(value); 339 ns->len = strlen(value); 340 STAILQ_INIT(&ns->vars); 341 TAILQ_INSERT_TAIL(&nss, ns, tq); 342 } 343 } 344 345 /* See if this parameter has already been added. */ 346 if (ipnum != 0) 347 dp = j->intparams[ipnum]; 348 else 349 TAILQ_FOREACH(dp, &j->params, tq) 350 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 351 break; 352 if (dp != NULL) { 353 /* Found it - append or replace. */ 354 if (strcmp(dp->name, name)) { 355 free(dp->name); 356 dp->name = estrdup(name); 357 } 358 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 359 free_param_strings(dp); 360 TAILQ_CONCAT(&dp->val, &nss, tq); 361 dp->flags |= flags; 362 } else { 363 /* Not found - add it. */ 364 np = emalloc(sizeof(struct cfparam)); 365 np->name = estrdup(name); 366 TAILQ_INIT(&np->val); 367 TAILQ_CONCAT(&np->val, &nss, tq); 368 np->flags = flags; 369 np->gen = 0; 370 TAILQ_INSERT_TAIL(&j->params, np, tq); 371 if (ipnum != 0) 372 j->intparams[ipnum] = np; 373 else 374 for (ipnum = 1; ipnum < IP_NPARAM; ipnum++) 375 if (!(intparams[ipnum].flags & PF_CONV) && 376 equalopts(name, intparams[ipnum].name)) { 377 j->intparams[ipnum] = np; 378 np->flags |= intparams[ipnum].flags; 379 break; 380 } 381 } 382} 383 384/* 385 * Return if a boolean parameter exists and is true. 386 */ 387int 388bool_param(const struct cfparam *p) 389{ 390 const char *cs; 391 392 if (p == NULL) 393 return 0; 394 cs = strrchr(p->name, '.'); 395 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 396 (TAILQ_EMPTY(&p->val) || 397 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 398 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 399} 400 401/* 402 * Set an integer if a parameter if it exists. 403 */ 404int 405int_param(const struct cfparam *p, int *ip) 406{ 407 if (p == NULL || TAILQ_EMPTY(&p->val)) 408 return 0; 409 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 410 return 1; 411} 412 413/* 414 * Return the string value of a scalar parameter if it exists. 415 */ 416const char * 417string_param(const struct cfparam *p) 418{ 419 return (p && !TAILQ_EMPTY(&p->val) 420 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 421} 422 423/* 424 * Check syntax and values of internal parameters. Set some internal 425 * parameters based on the values of others. 426 */ 427int 428check_intparams(struct cfjail *j) 429{ 430 struct in_addr addr4; 431 struct addrinfo hints; 432 struct addrinfo *ai0, *ai; 433 struct cfparam *p; 434 struct cfstring *s; 435 FILE *f; 436 const char *hostname, *val; 437 char *cs, *ep, *ln; 438 size_t size, lnlen; 439 int error, gicode, ip4ok, defif, prefix; 440 int mib[4]; 441 char avalue4[INET_ADDRSTRLEN]; 442#ifdef INET6 443 struct in6_addr addr6; 444 int ip6ok, isip6; 445 char avalue6[INET6_ADDRSTRLEN]; 446#endif 447 448 error = 0; 449 /* Check format of boolan and integer values. */ 450 TAILQ_FOREACH(p, &j->params, tq) { 451 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 452 val = TAILQ_LAST(&p->val, cfstrings)->s; 453 if (p->flags & PF_BOOL) { 454 if (strcasecmp(val, "false") && 455 strcasecmp(val, "true") && 456 ((void)strtol(val, &ep, 10), *ep)) { 457 jail_warnx(j, 458 "%s: unknown boolean value \"%s\"", 459 p->name, val); 460 error = -1; 461 } 462 } else { 463 (void)strtol(val, &ep, 10); 464 if (ep == val || *ep) { 465 jail_warnx(j, 466 "%s: non-integer value \"%s\"", 467 p->name, val); 468 error = -1; 469 } 470 } 471 } 472 } 473 474 /* 475 * The ip_hostname parameter looks up the hostname, and adds parameters 476 * for any IP addresses it finds. 477 */ 478 if (((j->flags & JF_OP_MASK) != JF_STOP || 479 j->intparams[IP_INTERFACE] != NULL) && 480 bool_param(j->intparams[IP_IP_HOSTNAME]) && 481 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 482 j->intparams[IP_IP_HOSTNAME] = NULL; 483 /* 484 * Silently ignore unsupported address families from 485 * DNS lookups. 486 */ 487 size = 4; 488 ip4ok = sysctlnametomib("security.jail.param.ip4", mib, &size) 489 == 0; 490#ifdef INET6 491 size = 4; 492 ip6ok = sysctlnametomib("security.jail.param.ip6", mib, &size) 493 == 0; 494#endif 495 if (ip4ok 496#ifdef INET6 497 || ip6ok 498#endif 499 ) { 500 /* Look up the hostname (or get the address) */ 501 memset(&hints, 0, sizeof(hints)); 502 hints.ai_socktype = SOCK_STREAM; 503 hints.ai_family = 504#ifdef INET6 505 ip6ok ? (ip4ok ? PF_UNSPEC : PF_INET6) : 506#endif 507 PF_INET; 508 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 509 if (gicode != 0) { 510 jail_warnx(j, "host.hostname %s: %s", hostname, 511 gai_strerror(gicode)); 512 error = -1; 513 } else { 514 /* 515 * Convert the addresses to ASCII so jailparam 516 * can convert them back. Errors are not 517 * expected here. 518 */ 519 for (ai = ai0; ai; ai = ai->ai_next) 520 switch (ai->ai_family) { 521 case AF_INET: 522 memcpy(&addr4, 523 &((struct sockaddr_in *) 524 (void *)ai->ai_addr)-> 525 sin_addr, sizeof(addr4)); 526 if (inet_ntop(AF_INET, 527 &addr4, avalue4, 528 INET_ADDRSTRLEN) == NULL) 529 err(1, "inet_ntop"); 530 add_param(j, NULL, KP_IP4_ADDR, 531 avalue4); 532 break; 533#ifdef INET6 534 case AF_INET6: 535 memcpy(&addr6, 536 &((struct sockaddr_in6 *) 537 (void *)ai->ai_addr)-> 538 sin6_addr, sizeof(addr6)); 539 if (inet_ntop(AF_INET6, 540 &addr6, avalue6, 541 INET6_ADDRSTRLEN) == NULL) 542 err(1, "inet_ntop"); 543 add_param(j, NULL, KP_IP6_ADDR, 544 avalue6); 545 break; 546#endif 547 } 548 freeaddrinfo(ai0); 549 } 550 } 551 } 552 553 /* 554 * IP addresses may include an interface to set that address on, 555 * and a netmask/suffix for that address. 556 */ 557 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 558#ifdef INET6 559 for (isip6 = 0; isip6 <= 1; isip6++) 560#else 561#define isip6 0 562 do 563#endif 564 { 565 if (j->intparams[KP_IP4_ADDR + isip6] == NULL) 566 continue; 567 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR + isip6]->val, tq) { 568 cs = strchr(s->s, '|'); 569 if (cs || defif) 570 add_param(j, NULL, IP__IP4_IFADDR + isip6, 571 s->s); 572 if (cs) { 573 strcpy(s->s, cs + 1); 574 s->len -= cs + 1 - s->s; 575 } 576 if ((cs = strchr(s->s, '/'))) { 577 prefix = strtol(cs + 1, &ep, 10); 578 if ( 579#ifdef INET6 580 !isip6 && 581#endif 582 *ep == '.' 583 ? inet_pton(AF_INET, cs + 1, &addr4) != 1 584 : *ep || prefix < 0 || prefix > ( 585#ifdef INET6 586 isip6 ? 128 : 587#endif 588 32)) { 589 jail_warnx(j, 590#ifdef INET6 591 isip6 592 ? "ip6.addr: bad prefixlen \"%s\"" : 593#endif 594 "ip4.addr: bad netmask \"%s\"", 595 cs); 596 error = -1; 597 } 598 *cs = '\0'; 599 s->len = cs - s->s + 1; 600 } 601 } 602 } 603#ifndef INET6 604 while (0); 605#endif 606 607 /* 608 * Read mount.fstab file(s), and treat each line as its own mount 609 * parameter. 610 */ 611 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 612 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 613 if (s->len == 0) 614 continue; 615 f = fopen(s->s, "r"); 616 if (f == NULL) { 617 jail_warnx(j, "mount.fstab: %s: %s", 618 s->s, strerror(errno)); 619 error = -1; 620 continue; 621 } 622 while ((ln = fgetln(f, &lnlen))) { 623 if ((cs = memchr(ln, '#', lnlen - 1))) 624 lnlen = cs - ln + 1; 625 if (ln[lnlen - 1] == '\n' || 626 ln[lnlen - 1] == '#') 627 ln[lnlen - 1] = '\0'; 628 else { 629 cs = alloca(lnlen + 1); 630 strlcpy(cs, ln, lnlen + 1); 631 ln = cs; 632 } 633 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 634 } 635 fclose(f); 636 } 637 } 638 if (error) 639 failed(j); 640 return error; 641} 642 643/* 644 * Import parameters into libjail's binary jailparam format. 645 */ 646int 647import_params(struct cfjail *j) 648{ 649 struct cfparam *p; 650 struct cfstring *s, *ts; 651 struct jailparam *jp; 652 char *value, *cs; 653 size_t vallen; 654 int error; 655 656 error = 0; 657 j->njp = 0; 658 TAILQ_FOREACH(p, &j->params, tq) 659 if (!(p->flags & PF_INTERNAL)) 660 j->njp++; 661 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 662 TAILQ_FOREACH(p, &j->params, tq) { 663 if (p->flags & PF_INTERNAL) 664 continue; 665 if (jailparam_init(jp, p->name) < 0) { 666 error = -1; 667 jail_warnx(j, "%s", jail_errmsg); 668 continue; 669 } 670 if (TAILQ_EMPTY(&p->val)) 671 value = NULL; 672 else if (!jp->jp_elemlen || 673 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 674 /* 675 * Scalar parameters silently discard multiple (array) 676 * values, keeping only the last value added. This 677 * lets values added from the command line append to 678 * arrays wthout pre-checking the type. 679 */ 680 value = TAILQ_LAST(&p->val, cfstrings)->s; 681 } else { 682 /* 683 * Convert arrays into comma-separated strings, which 684 * jailparam_import will then convert back into arrays. 685 */ 686 vallen = 0; 687 TAILQ_FOREACH(s, &p->val, tq) 688 vallen += s->len + 1; 689 value = alloca(vallen); 690 cs = value; 691 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 692 strcpy(cs, s->s); 693 if (ts != NULL) { 694 cs += s->len + 1; 695 cs[-1] = ','; 696 } 697 } 698 } 699 if (jailparam_import(jp, value) < 0) { 700 error = -1; 701 jail_warnx(j, "%s", jail_errmsg); 702 } 703 jp++; 704 } 705 if (error) { 706 jailparam_free(j->jp, j->njp); 707 free(j->jp); 708 j->jp = NULL; 709 failed(j); 710 } 711 return error; 712} 713 714/* 715 * Check if options are equal (with or without the "no" prefix). 716 */ 717int 718equalopts(const char *opt1, const char *opt2) 719{ 720 char *p; 721 722 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 723 if (strcmp(opt1, opt2) == 0) 724 return (1); 725 /* "noopt" vs. "opt" */ 726 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 727 return (1); 728 /* "opt" vs. "noopt" */ 729 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 730 return (1); 731 while ((p = strchr(opt1, '.')) != NULL && 732 !strncmp(opt1, opt2, ++p - opt1)) { 733 opt2 += p - opt1; 734 opt1 = p; 735 /* "foo.noopt" vs. "foo.opt" */ 736 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 737 return (1); 738 /* "foo.opt" vs. "foo.noopt" */ 739 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 740 return (1); 741 } 742 return (0); 743} 744 745/* 746 * See if a jail name matches a wildcard. 747 */ 748int 749wild_jail_match(const char *jname, const char *wname) 750{ 751 const char *jc, *jd, *wc, *wd; 752 753 /* 754 * A non-final "*" component in the wild name matches a single jail 755 * component, and a final "*" matches one or more jail components. 756 */ 757 for (jc = jname, wc = wname; 758 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 759 jc = jd + 1, wc = wd + 1) 760 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 761 return 0; 762 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 763} 764 765/* 766 * Return if a jail name is a wildcard. 767 */ 768int 769wild_jail_name(const char *wname) 770{ 771 const char *wc; 772 773 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 774 if ((wc == wname || wc[-1] == '.') && 775 (wc[1] == '\0' || wc[1] == '.')) 776 return 1; 777 return 0; 778} 779 780/* 781 * Free a parameter record and all its strings and variables. 782 */ 783static void 784free_param(struct cfparams *pp, struct cfparam *p) 785{ 786 free(p->name); 787 free_param_strings(p); 788 TAILQ_REMOVE(pp, p, tq); 789 free(p); 790} 791 792static void 793free_param_strings(struct cfparam *p) 794{ 795 struct cfstring *s; 796 struct cfvar *v; 797 798 while ((s = TAILQ_FIRST(&p->val))) { 799 free(s->s); 800 while ((v = STAILQ_FIRST(&s->vars))) { 801 free(v->name); 802 STAILQ_REMOVE_HEAD(&s->vars, tq); 803 free(v); 804 } 805 TAILQ_REMOVE(&p->val, s, tq); 806 free(s); 807 } 808} 809