usr.sbin/jail/config.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   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/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/types.h>
  33 #include <sys/errno.h>
  34 #include <sys/socket.h>
  35 #include <sys/sysctl.h>
  36
  37 #include <arpa/inet.h>
  38 #include <netinet/in.h>
  39
  40 #include <err.h>
  41 #include <netdb.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46
  47 #include "jailp.h"
  48
  49 struct ipspec {
  50         const char      *name;
  51         unsigned        flags;
  52 };
  53
  54 extern FILE *yyin;
  55 extern int yynerrs;
  56
  57 extern int yyparse(void);
  58
  59 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails);
  60
  61 static void free_param(struct cfparams *pp, struct cfparam *p);
  62 static void free_param_strings(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(void)
 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         if (!strcmp(cfname, "-")) {
 142                 cfname = "STDIN";
 143                 yyin = stdin;
 144         } else {
 145                 yyin = fopen(cfname, "r");
 146                 if (!yyin)
 147                         err(1, "%s", cfname);
 148         }
 149         if (yyparse() || yynerrs)
 150                 exit(1);
 151
 152         /* Separate the wildcard jails out from the actual jails. */
 153         jseq = 0;
 154         TAILQ_INIT(&wild);
 155         TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) {
 156                 j->seq = ++jseq;
 157                 if (wild_jail_name(j->name))
 158                         requeue(j, &wild);
 159         }
 160
 161         TAILQ_FOREACH(j, &cfjails, tq) {
 162                 /* Set aside the jail's parameters. */
 163                 TAILQ_INIT(&opp);
 164                 TAILQ_CONCAT(&opp, &j->params, tq);
 165                 /*
 166                  * The jail name implies its "name" or "jid" parameter,
 167                  * though they may also be explicitly set later on.
 168                  */
 169                 add_param(j, NULL,
 170                     strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME,
 171                     j->name);
 172                 /*
 173                  * Collect parameters for the jail, global parameters/variables,
 174                  * and any matching wildcard jails.
 175                  */
 176                 did_self = 0;
 177                 TAILQ_FOREACH(wj, &wild, tq) {
 178                         if (j->seq < wj->seq && !did_self) {
 179                                 TAILQ_FOREACH(p, &opp, tq)
 180                                         add_param(j, p, 0, NULL);
 181                                 did_self = 1;
 182                         }
 183                         if (wild_jail_match(j->name, wj->name))
 184                                 TAILQ_FOREACH(p, &wj->params, tq)
 185                                         add_param(j, p, 0, NULL);
 186                 }
 187                 if (!did_self)
 188                         TAILQ_FOREACH(p, &opp, tq)
 189                                 add_param(j, p, 0, NULL);
 190
 191                 /* Resolve any variable substitutions. */
 192                 pgen = 0;
 193                 TAILQ_FOREACH(p, &j->params, tq) {
 194                     p->gen = ++pgen;
 195                 find_vars:
 196                     TAILQ_FOREACH(s, &p->val, tq) {
 197                         while ((v = STAILQ_FIRST(&s->vars))) {
 198                                 TAILQ_FOREACH(vp, &j->params, tq)
 199                                         if (!strcmp(vp->name, v->name))
 200                                                 break;
 201                                 if (!vp) {
 202                                         jail_warnx(j,
 203                                             "%s: variable \"%s\" not found",
 204                                             p->name, v->name);
 205                                 bad_var:
 206                                         j->flags |= JF_FAILED;
 207                                         TAILQ_FOREACH(vp, &j->params, tq)
 208                                                 if (vp->gen == pgen)
 209                                                         vp->flags |= PF_BAD;
 210                                         goto free_var;
 211                                 }
 212                                 if (vp->flags & PF_BAD)
 213                                         goto bad_var;
 214                                 if (vp->gen == pgen) {
 215                                         jail_warnx(j, "%s: variable loop",
 216                                             v->name);
 217                                         goto bad_var;
 218                                 }
 219                                 TAILQ_FOREACH(vs, &vp->val, tq)
 220                                         if (!STAILQ_EMPTY(&vs->vars)) {
 221                                                 vp->gen = pgen;
 222                                                 TAILQ_REMOVE(&j->params, vp,
 223                                                     tq);
 224                                                 TAILQ_INSERT_BEFORE(p, vp, tq);
 225                                                 p = vp;
 226                                                 goto find_vars;
 227                                         }
 228                                 vs = TAILQ_FIRST(&vp->val);
 229                                 if (TAILQ_NEXT(vs, tq) != NULL &&
 230                                     (s->s[0] != '\0' ||
 231                                      STAILQ_NEXT(v, tq))) {
 232                                         jail_warnx(j, "%s: array cannot be "
 233                                             "substituted inline",
 234                                             p->name);
 235                                         goto bad_var;
 236                                 }
 237                                 s->s = erealloc(s->s, s->len + vs->len + 1);
 238                                 memmove(s->s + v->pos + vs->len,
 239                                     s->s + v->pos,
 240                                     s->len - v->pos + 1);
 241                                 memcpy(s->s + v->pos, vs->s, vs->len);
 242                                 vv = v;
 243                                 while ((vv = STAILQ_NEXT(vv, tq)))
 244                                         vv->pos += vs->len;
 245                                 s->len += vs->len;
 246                                 while ((vs = TAILQ_NEXT(vs, tq))) {
 247                                         ns = emalloc(sizeof(struct cfstring));
 248                                         ns->s = estrdup(vs->s);
 249                                         ns->len = vs->len;
 250                                         STAILQ_INIT(&ns->vars);
 251                                         TAILQ_INSERT_AFTER(&p->val, s, ns, tq);
 252                                         s = ns;
 253                                 }
 254                         free_var:
 255                                 free(v->name);
 256                                 STAILQ_REMOVE_HEAD(&s->vars, tq);
 257                                 free(v);
 258                         }
 259                     }
 260                 }
 261
 262                 /* Free the jail's original parameter list and any variables. */
 263                 while ((p = TAILQ_FIRST(&opp)))
 264                         free_param(&opp, p);
 265                 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp)
 266                         if (p->flags & PF_VAR)
 267                                 free_param(&j->params, p);
 268         }
 269         while ((wj = TAILQ_FIRST(&wild))) {
 270                 free(wj->name);
 271                 while ((p = TAILQ_FIRST(&wj->params)))
 272                         free_param(&wj->params, p);
 273                 TAILQ_REMOVE(&wild, wj, tq);
 274         }
 275 }
 276
 277 /*
 278  * Create a new jail record.
 279  */
 280 struct cfjail *
 281 add_jail(void)
 282 {
 283         struct cfjail *j;
 284
 285         j = emalloc(sizeof(struct cfjail));
 286         memset(j, 0, sizeof(struct cfjail));
 287         TAILQ_INIT(&j->params);
 288         STAILQ_INIT(&j->dep[DEP_FROM]);
 289         STAILQ_INIT(&j->dep[DEP_TO]);
 290         j->queue = &cfjails;
 291         TAILQ_INSERT_TAIL(&cfjails, j, tq);
 292         return j;
 293 }
 294
 295 /*
 296  * Add a parameter to a jail.
 297  */
 298 void
 299 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum,
 300     const char *value)
 301 {
 302         struct cfstrings nss;
 303         struct cfparam *dp, *np;
 304         struct cfstring *s, *ns;
 305         struct cfvar *v, *nv;
 306         const char *name;
 307         char *cs, *tname;
 308         unsigned flags;
 309
 310         if (j == NULL) {
 311                 /* Create a single anonymous jail if one doesn't yet exist. */
 312                 j = TAILQ_LAST(&cfjails, cfjails);
 313                 if (j == NULL)
 314                         j = add_jail();
 315         }
 316         TAILQ_INIT(&nss);
 317         if (p != NULL) {
 318                 name = p->name;
 319                 flags = p->flags;
 320                 /*
 321                  * Make a copy of the parameter's string list,
 322                  * which may be freed if it's overridden later.
 323                  */
 324                 TAILQ_FOREACH(s, &p->val, tq) {
 325                         ns = emalloc(sizeof(struct cfstring));
 326                         ns->s = estrdup(s->s);
 327                         ns->len = s->len;
 328                         STAILQ_INIT(&ns->vars);
 329                         STAILQ_FOREACH(v, &s->vars, tq) {
 330                                 nv = emalloc(sizeof(struct cfvar));
 331                                 nv->name = strdup(v->name);
 332                                 nv->pos = v->pos;
 333                                 STAILQ_INSERT_TAIL(&ns->vars, nv, tq);
 334                         }
 335                         TAILQ_INSERT_TAIL(&nss, ns, tq);
 336                 }
 337         } else {
 338                 flags = PF_APPEND;
 339                 if (ipnum != IP__NULL) {
 340                         name = intparams[ipnum].name;
 341                         flags |= intparams[ipnum].flags;
 342                 } else if ((cs = strchr(value, '='))) {
 343                         tname = alloca(cs - value + 1);
 344                         strlcpy(tname, value, cs - value + 1);
 345                         name = tname;
 346                         value = cs + 1;
 347                 } else {
 348                         name = value;
 349                         value = NULL;
 350                 }
 351                 if (value != NULL) {
 352                         ns = emalloc(sizeof(struct cfstring));
 353                         ns->s = estrdup(value);
 354                         ns->len = strlen(value);
 355                         STAILQ_INIT(&ns->vars);
 356                         TAILQ_INSERT_TAIL(&nss, ns, tq);
 357                 }
 358         }
 359
 360         /* See if this parameter has already been added. */
 361         if (ipnum != IP__NULL)
 362                 dp = j->intparams[ipnum];
 363         else
 364                 TAILQ_FOREACH(dp, &j->params, tq)
 365                         if (!(dp->flags & PF_CONV) && equalopts(dp->name, name))
 366                                 break;
 367         if (dp != NULL) {
 368                 /* Found it - append or replace. */
 369                 if (dp->flags & PF_IMMUTABLE) {
 370                         jail_warnx(j, "cannot redefine variable \"%s\".",
 371                             dp->name);
 372                         return;
 373                 }
 374                 if (strcmp(dp->name, name)) {
 375                         free(dp->name);
 376                         dp->name = estrdup(name);
 377                 }
 378                 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
 379                         free_param_strings(dp);
 380                 TAILQ_CONCAT(&dp->val, &nss, tq);
 381                 dp->flags |= flags;
 382         } else {
 383                 /* Not found - add it. */
 384                 np = emalloc(sizeof(struct cfparam));
 385                 np->name = estrdup(name);
 386                 TAILQ_INIT(&np->val);
 387                 TAILQ_CONCAT(&np->val, &nss, tq);
 388                 np->flags = flags;
 389                 np->gen = 0;
 390                 TAILQ_INSERT_TAIL(&j->params, np, tq);
 391                 if (ipnum != IP__NULL)
 392                         j->intparams[ipnum] = np;
 393                 else
 394                         for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++)
 395                                 if (!(intparams[ipnum].flags & PF_CONV) &&
 396                                     equalopts(name, intparams[ipnum].name)) {
 397                                         j->intparams[ipnum] = np;
 398                                         np->flags |= intparams[ipnum].flags;
 399                                         break;
 400                                 }
 401         }
 402 }
 403
 404 /*
 405  * Return if a boolean parameter exists and is true.
 406  */
 407 int
 408 bool_param(const struct cfparam *p)
 409 {
 410         const char *cs;
 411
 412         if (p == NULL)
 413                 return 0;
 414         cs = strrchr(p->name, '.');
 415         return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
 416             (TAILQ_EMPTY(&p->val) ||
 417              !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
 418              (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
 419 }
 420
 421 /*
 422  * Set an integer if a parameter if it exists.
 423  */
 424 int
 425 int_param(const struct cfparam *p, int *ip)
 426 {
 427         if (p == NULL || TAILQ_EMPTY(&p->val))
 428                 return 0;
 429         *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
 430         return 1;
 431 }
 432
 433 /*
 434  * Return the string value of a scalar parameter if it exists.
 435  */
 436 const char *
 437 string_param(const struct cfparam *p)
 438 {
 439         return (p && !TAILQ_EMPTY(&p->val)
 440             ? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
 441 }
 442
 443 /*
 444  * Check syntax and values of internal parameters.  Set some internal
 445  * parameters based on the values of others.
 446  */
 447 int
 448 check_intparams(struct cfjail *j)
 449 {
 450         struct cfparam *p;
 451         struct cfstring *s;
 452         FILE *f;
 453         const char *val;
 454         char *cs, *ep, *ln;
 455         size_t lnlen;
 456         int error;
 457 #if defined(INET) || defined(INET6)
 458         struct addrinfo hints;
 459         struct addrinfo *ai0, *ai;
 460         const char *hostname;
 461         int gicode, defif;
 462 #endif
 463 #ifdef INET
 464         struct in_addr addr4;
 465         int ip4ok;
 466         char avalue4[INET_ADDRSTRLEN];
 467 #endif
 468 #ifdef INET6
 469         struct in6_addr addr6;
 470         int ip6ok;
 471         char avalue6[INET6_ADDRSTRLEN];
 472 #endif
 473
 474         error = 0;
 475         /* Check format of boolan and integer values. */
 476         TAILQ_FOREACH(p, &j->params, tq) {
 477                 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
 478                         val = TAILQ_LAST(&p->val, cfstrings)->s;
 479                         if (p->flags & PF_BOOL) {
 480                                 if (strcasecmp(val, "false") &&
 481                                     strcasecmp(val, "true") &&
 482                                     ((void)strtol(val, &ep, 10), *ep)) {
 483                                         jail_warnx(j,
 484                                             "%s: unknown boolean value \"%s\"",
 485                                             p->name, val);
 486                                         error = -1;
 487                                 }
 488                         } else {
 489                                 (void)strtol(val, &ep, 10);
 490                                 if (ep == val || *ep) {
 491                                         jail_warnx(j,
 492                                             "%s: non-integer value \"%s\"",
 493                                             p->name, val);
 494                                         error = -1;
 495                                 }
 496                         }
 497                 }
 498         }
 499
 500 #if defined(INET) || defined(INET6)
 501         /*
 502          * The ip_hostname parameter looks up the hostname, and adds parameters
 503          * for any IP addresses it finds.
 504          */
 505         if (((j->flags & JF_OP_MASK) != JF_STOP ||
 506             j->intparams[IP_INTERFACE] != NULL) &&
 507             bool_param(j->intparams[IP_IP_HOSTNAME]) &&
 508             (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
 509                 j->intparams[IP_IP_HOSTNAME] = NULL;
 510                 /*
 511                  * Silently ignore unsupported address families from
 512                  * DNS lookups.
 513                  */
 514 #ifdef INET
 515                 ip4ok = feature_present("inet");
 516 #endif
 517 #ifdef INET6
 518                 ip6ok = feature_present("inet6");
 519 #endif
 520                 if (
 521 #if defined(INET) && defined(INET6)
 522                     ip4ok || ip6ok
 523 #elif defined(INET)
 524                     ip4ok
 525 #elif defined(INET6)
 526                     ip6ok
 527 #endif
 528                          ) {
 529                         /* Look up the hostname (or get the address) */
 530                         memset(&hints, 0, sizeof(hints));
 531                         hints.ai_socktype = SOCK_STREAM;
 532                         hints.ai_family =
 533 #if defined(INET) && defined(INET6)
 534                             ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) :  PF_INET6;
 535 #elif defined(INET)
 536                             PF_INET;
 537 #elif defined(INET6)
 538                             PF_INET6;
 539 #endif
 540                         gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
 541                         if (gicode != 0) {
 542                                 jail_warnx(j, "host.hostname %s: %s", hostname,
 543                                     gai_strerror(gicode));
 544                                 error = -1;
 545                         } else {
 546                                 /*
 547                                  * Convert the addresses to ASCII so jailparam
 548                                  * can convert them back.  Errors are not
 549                                  * expected here.
 550                                  */
 551                                 for (ai = ai0; ai; ai = ai->ai_next)
 552                                         switch (ai->ai_family) {
 553 #ifdef INET
 554                                         case AF_INET:
 555                                                 memcpy(&addr4,
 556                                                     &((struct sockaddr_in *)
 557                                                     (void *)ai->ai_addr)->
 558                                                     sin_addr, sizeof(addr4));
 559                                                 if (inet_ntop(AF_INET,
 560                                                     &addr4, avalue4,
 561                                                     INET_ADDRSTRLEN) == NULL)
 562                                                         err(1, "inet_ntop");
 563                                                 add_param(j, NULL, KP_IP4_ADDR,
 564                                                     avalue4);
 565                                                 break;
 566 #endif
 567 #ifdef INET6
 568                                         case AF_INET6:
 569                                                 memcpy(&addr6,
 570                                                     &((struct sockaddr_in6 *)
 571                                                     (void *)ai->ai_addr)->
 572                                                     sin6_addr, sizeof(addr6));
 573                                                 if (inet_ntop(AF_INET6,
 574                                                     &addr6, avalue6,
 575                                                     INET6_ADDRSTRLEN) == NULL)
 576                                                         err(1, "inet_ntop");
 577                                                 add_param(j, NULL, KP_IP6_ADDR,
 578                                                     avalue6);
 579                                                 break;
 580 #endif
 581                                         }
 582                                 freeaddrinfo(ai0);
 583                         }
 584                 }
 585         }
 586
 587         /*
 588          * IP addresses may include an interface to set that address on,
 589          * a netmask/suffix for that address and options for ifconfig.
 590          * These are copied to an internal command parameter and then stripped
 591          * so they won't be passed on to jailparam_set.
 592          */
 593         defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
 594 #ifdef INET
 595         if (j->intparams[KP_IP4_ADDR] != NULL) {
 596                 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
 597                         cs = strchr(s->s, '|');
 598                         if (cs || defif)
 599                                 add_param(j, NULL, IP__IP4_IFADDR, s->s);
 600                         if (cs) {
 601                                 s->len -= cs + 1 - s->s;
 602                                 memmove(s->s, cs + 1, s->len + 1);
 603                         }
 604                         if ((cs = strchr(s->s, '/')) != NULL) {
 605                                 *cs = '\0';
 606                                 s->len = cs - s->s;
 607                         }
 608                         if ((cs = strchr(s->s, ' ')) != NULL) {
 609                                 *cs = '\0';
 610                                 s->len = cs - s->s;
 611                         }
 612                 }
 613         }
 614 #endif
 615 #ifdef INET6
 616         if (j->intparams[KP_IP6_ADDR] != NULL) {
 617                 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
 618                         cs = strchr(s->s, '|');
 619                         if (cs || defif)
 620                                 add_param(j, NULL, IP__IP6_IFADDR, s->s);
 621                         if (cs) {
 622                                 s->len -= cs + 1 - s->s;
 623                                 memmove(s->s, cs + 1, s->len + 1);
 624                         }
 625                         if ((cs = strchr(s->s, '/')) != NULL) {
 626                                 *cs = '\0';
 627                                 s->len = cs - s->s;
 628                         }
 629                         if ((cs = strchr(s->s, ' ')) != NULL) {
 630                                 *cs = '\0';
 631                                 s->len = cs - s->s;
 632                         }
 633                 }
 634         }
 635 #endif
 636 #endif
 637
 638         /*
 639          * Read mount.fstab file(s), and treat each line as its own mount
 640          * parameter.
 641          */
 642         if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
 643                 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
 644                         if (s->len == 0)
 645                                 continue;
 646                         f = fopen(s->s, "r");
 647                         if (f == NULL) {
 648                                 jail_warnx(j, "mount.fstab: %s: %s",
 649                                     s->s, strerror(errno));
 650                                 error = -1;
 651                                 continue;
 652                         }
 653                         while ((ln = fgetln(f, &lnlen))) {
 654                                 if ((cs = memchr(ln, '#', lnlen - 1)))
 655                                         lnlen = cs - ln + 1;
 656                                 if (ln[lnlen - 1] == '\n' ||
 657                                     ln[lnlen - 1] == '#')
 658                                         ln[lnlen - 1] = '\0';
 659                                 else {
 660                                         cs = alloca(lnlen + 1);
 661                                         strlcpy(cs, ln, lnlen + 1);
 662                                         ln = cs;
 663                                 }
 664                                 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
 665                         }
 666                         fclose(f);
 667                 }
 668         }
 669         if (error)
 670                 failed(j);
 671         return error;
 672 }
 673
 674 /*
 675  * Import parameters into libjail's binary jailparam format.
 676  */
 677 int
 678 import_params(struct cfjail *j)
 679 {
 680         struct cfparam *p;
 681         struct cfstring *s, *ts;
 682         struct jailparam *jp;
 683         char *value, *cs;
 684         size_t vallen;
 685         int error;
 686
 687         error = 0;
 688         j->njp = 0;
 689         TAILQ_FOREACH(p, &j->params, tq)
 690                 if (!(p->flags & PF_INTERNAL))
 691                         j->njp++;
 692         j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
 693         TAILQ_FOREACH(p, &j->params, tq) {
 694                 if (p->flags & PF_INTERNAL)
 695                         continue;
 696                 if (jailparam_init(jp, p->name) < 0) {
 697                         error = -1;
 698                         jail_warnx(j, "%s", jail_errmsg);
 699                         jp++;
 700                         continue;
 701                 }
 702                 if (TAILQ_EMPTY(&p->val))
 703                         value = NULL;
 704                 else if (!jp->jp_elemlen ||
 705                          !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
 706                         /*
 707                          * Scalar parameters silently discard multiple (array)
 708                          * values, keeping only the last value added.  This
 709                          * lets values added from the command line append to
 710                          * arrays wthout pre-checking the type.
 711                          */
 712                         value = TAILQ_LAST(&p->val, cfstrings)->s;
 713                 } else {
 714                         /*
 715                          * Convert arrays into comma-separated strings, which
 716                          * jailparam_import will then convert back into arrays.
 717                          */
 718                         vallen = 0;
 719                         TAILQ_FOREACH(s, &p->val, tq)
 720                                 vallen += s->len + 1;
 721                         value = alloca(vallen);
 722                         cs = value;
 723                         TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
 724                                 memcpy(cs, s->s, s->len);
 725                                 cs += s->len + 1;
 726                                 cs[-1] = ',';
 727                         }
 728                         value[vallen - 1] = '\0';
 729                 }
 730                 if (jailparam_import(jp, value) < 0) {
 731                         error = -1;
 732                         jail_warnx(j, "%s", jail_errmsg);
 733                 }
 734                 jp++;
 735         }
 736         if (error) {
 737                 jailparam_free(j->jp, j->njp);
 738                 free(j->jp);
 739                 j->jp = NULL;
 740                 failed(j);
 741         }
 742         return error;
 743 }
 744
 745 /*
 746  * Check if options are equal (with or without the "no" prefix).
 747  */
 748 int
 749 equalopts(const char *opt1, const char *opt2)
 750 {
 751         char *p;
 752
 753         /* "opt" vs. "opt" or "noopt" vs. "noopt" */
 754         if (strcmp(opt1, opt2) == 0)
 755                 return (1);
 756         /* "noopt" vs. "opt" */
 757         if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
 758                 return (1);
 759         /* "opt" vs. "noopt" */
 760         if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
 761                 return (1);
 762         while ((p = strchr(opt1, '.')) != NULL &&
 763             !strncmp(opt1, opt2, ++p - opt1)) {
 764                 opt2 += p - opt1;
 765                 opt1 = p;
 766                 /* "foo.noopt" vs. "foo.opt" */
 767                 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
 768                         return (1);
 769                 /* "foo.opt" vs. "foo.noopt" */
 770                 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
 771                         return (1);
 772         }
 773         return (0);
 774 }
 775
 776 /*
 777  * See if a jail name matches a wildcard.
 778  */
 779 int
 780 wild_jail_match(const char *jname, const char *wname)
 781 {
 782         const char *jc, *jd, *wc, *wd;
 783
 784         /*
 785          * A non-final "*" component in the wild name matches a single jail
 786          * component, and a final "*" matches one or more jail components.
 787          */
 788         for (jc = jname, wc = wname;
 789              (jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
 790              jc = jd + 1, wc = wd + 1)
 791                 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
 792                         return 0;
 793         return (!strcmp(jc, wc) || !strcmp(wc, "*"));
 794 }
 795
 796 /*
 797  * Return if a jail name is a wildcard.
 798  */
 799 int
 800 wild_jail_name(const char *wname)
 801 {
 802         const char *wc;
 803
 804         for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
 805                 if ((wc == wname || wc[-1] == '.') &&
 806                     (wc[1] == '\0' || wc[1] == '.'))
 807                         return 1;
 808         return 0;
 809 }
 810
 811 /*
 812  * Free a parameter record and all its strings and variables.
 813  */
 814 static void
 815 free_param(struct cfparams *pp, struct cfparam *p)
 816 {
 817         free(p->name);
 818         free_param_strings(p);
 819         TAILQ_REMOVE(pp, p, tq);
 820         free(p);
 821 }
 822
 823 static void
 824 free_param_strings(struct cfparam *p)
 825 {
 826         struct cfstring *s;
 827         struct cfvar *v;
 828
 829         while ((s = TAILQ_FIRST(&p->val))) {
 830                 free(s->s);
 831                 while ((v = STAILQ_FIRST(&s->vars))) {
 832                         free(v->name);
 833                         STAILQ_REMOVE_HEAD(&s->vars, tq);
 834                         free(v);
 835                 }
 836                 TAILQ_REMOVE(&p->val, s, tq);
 837                 free(s);
 838         }
 839 }