usr.sbin/jail/config.c

   1 /*-
   2  * Copyright (c) 2011 James Gritton
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/types.h>
  31 #include <sys/errno.h>
  32 #include <sys/socket.h>
  33 #include <sys/sysctl.h>
  34
  35 #include <arpa/inet.h>
  36 #include <netinet/in.h>
  37
  38 #include <err.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 struct ipspec {
  48         const char      *name;
  49         unsigned        flags;
  50 };
  51
  52 extern FILE *yyin;
  53 extern int yynerrs;
  54
  55 extern int yyparse(void);
  56
  57 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails);
  58
  59 static void free_param(struct cfparams *pp, struct cfparam *p);
  60 static void free_param_strings(struct cfparam *p);
  61
  62 static const struct ipspec intparams[] = {
  63     [IP_ALLOW_DYING] =          {"allow.dying",         PF_INTERNAL | PF_BOOL},
  64     [IP_COMMAND] =              {"command",             PF_INTERNAL},
  65     [IP_DEPEND] =               {"depend",              PF_INTERNAL},
  66     [IP_EXEC_CLEAN] =           {"exec.clean",          PF_INTERNAL | PF_BOOL},
  67     [IP_EXEC_CONSOLELOG] =      {"exec.consolelog",     PF_INTERNAL},
  68     [IP_EXEC_FIB] =             {"exec.fib",            PF_INTERNAL | PF_INT},
  69     [IP_EXEC_JAIL_USER] =       {"exec.jail_user",      PF_INTERNAL},
  70     [IP_EXEC_POSTSTART] =       {"exec.poststart",      PF_INTERNAL},
  71     [IP_EXEC_POSTSTOP] =        {"exec.poststop",       PF_INTERNAL},
  72     [IP_EXEC_PRESTART] =        {"exec.prestart",       PF_INTERNAL},
  73     [IP_EXEC_PRESTOP] =         {"exec.prestop",        PF_INTERNAL},
  74     [IP_EXEC_START] =           {"exec.start",          PF_INTERNAL},
  75     [IP_EXEC_STOP] =            {"exec.stop",           PF_INTERNAL},
  76     [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user",
  77                                                         PF_INTERNAL | PF_BOOL},
  78     [IP_EXEC_SYSTEM_USER] =     {"exec.system_user",    PF_INTERNAL},
  79     [IP_EXEC_TIMEOUT] =         {"exec.timeout",        PF_INTERNAL | PF_INT},
  80 #if defined(INET) || defined(INET6)
  81     [IP_INTERFACE] =            {"interface",           PF_INTERNAL},
  82     [IP_IP_HOSTNAME] =          {"ip_hostname",         PF_INTERNAL | PF_BOOL},
  83 #endif
  84     [IP_MOUNT] =                {"mount",               PF_INTERNAL | PF_REV},
  85     [IP_MOUNT_DEVFS] =          {"mount.devfs",         PF_INTERNAL | PF_BOOL},
  86     [IP_MOUNT_FDESCFS] =        {"mount.fdescfs",       PF_INTERNAL | PF_BOOL},
  87     [IP_MOUNT_PROCFS] =         {"mount.procfs",        PF_INTERNAL | PF_BOOL},
  88     [IP_MOUNT_FSTAB] =          {"mount.fstab",         PF_INTERNAL},
  89     [IP_STOP_TIMEOUT] =         {"stop.timeout",        PF_INTERNAL | PF_INT},
  90     [IP_VNET_INTERFACE] =       {"vnet.interface",      PF_INTERNAL},
  91 #ifdef INET
  92     [IP__IP4_IFADDR] =          {"ip4.addr",    PF_INTERNAL | PF_CONV | PF_REV},
  93 #endif
  94 #ifdef INET6
  95     [IP__IP6_IFADDR] =          {"ip6.addr",    PF_INTERNAL | PF_CONV | PF_REV},
  96 #endif
  97     [IP__MOUNT_FROM_FSTAB] =    {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV},
  98     [IP__OP] =                  {NULL,                  PF_CONV},
  99     [KP_ALLOW_CHFLAGS] =        {"allow.chflags",       0},
 100     [KP_ALLOW_MOUNT] =          {"allow.mount",         0},
 101     [KP_ALLOW_RAW_SOCKETS] =    {"allow.raw_sockets",   0},
 102     [KP_ALLOW_SET_HOSTNAME]=    {"allow.set_hostname",  0},
 103     [KP_ALLOW_SOCKET_AF] =      {"allow.socket_af",     0},
 104     [KP_ALLOW_SYSVIPC] =        {"allow.sysvipc",       0},
 105     [KP_DEVFS_RULESET] =        {"devfs_ruleset",       0},
 106     [KP_ENFORCE_STATFS] =       {"enforce_statfs",      0},
 107     [KP_HOST_HOSTNAME] =        {"host.hostname",       0},
 108 #ifdef INET
 109     [KP_IP4_ADDR] =             {"ip4.addr",            0},
 110 #endif
 111 #ifdef INET6
 112     [KP_IP6_ADDR] =             {"ip6.addr",            0},
 113 #endif
 114     [KP_JID] =                  {"jid",                 0},
 115     [KP_NAME] =                 {"name",                0},
 116     [KP_PATH] =                 {"path",                0},
 117     [KP_PERSIST] =              {"persist",             0},
 118     [KP_SECURELEVEL] =          {"securelevel",         0},
 119     [KP_VNET] =                 {"vnet",                0},
 120 };
 121
 122 /*
 123  * Parse the jail configuration file.
 124  */
 125 void
 126 load_config(void)
 127 {
 128         struct cfjails wild;
 129         struct cfparams opp;
 130         struct cfjail *j, *tj, *wj;
 131         struct cfparam *p, *vp, *tp;
 132         struct cfstring *s, *vs, *ns;
 133         struct cfvar *v;
 134         char *ep;
 135         size_t varoff;
 136         int did_self, jseq, pgen;
 137
 138         if (!strcmp(cfname, "-")) {
 139                 cfname = "STDIN";
 140                 yyin = stdin;
 141         } else {
 142                 yyin = fopen(cfname, "r");
 143                 if (!yyin)
 144                         err(1, "%s", cfname);
 145         }
 146         if (yyparse() || yynerrs)
 147                 exit(1);
 148
 149         /* Separate the wildcard jails out from the actual jails. */
 150         jseq = 0;
 151         TAILQ_INIT(&wild);
 152         TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) {
 153                 j->seq = ++jseq;
 154                 if (wild_jail_name(j->name))
 155                         requeue(j, &wild);
 156         }
 157
 158         TAILQ_FOREACH(j, &cfjails, tq) {
 159                 /* Set aside the jail's parameters. */
 160                 TAILQ_INIT(&opp);
 161                 TAILQ_CONCAT(&opp, &j->params, tq);
 162                 /*
 163                  * The jail name implies its "name" or "jid" parameter,
 164                  * though they may also be explicitly set later on.
 165                  */
 166                 add_param(j, NULL,
 167                     strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME,
 168                     j->name);
 169                 /*
 170                  * Collect parameters for the jail, global parameters/variables,
 171                  * and any matching wildcard jails.
 172                  */
 173                 did_self = 0;
 174                 TAILQ_FOREACH(wj, &wild, tq) {
 175                         if (j->seq < wj->seq && !did_self) {
 176                                 TAILQ_FOREACH(p, &opp, tq)
 177                                         add_param(j, p, 0, NULL);
 178                                 did_self = 1;
 179                         }
 180                         if (wild_jail_match(j->name, wj->name))
 181                                 TAILQ_FOREACH(p, &wj->params, tq)
 182                                         add_param(j, p, 0, NULL);
 183                 }
 184                 if (!did_self)
 185                         TAILQ_FOREACH(p, &opp, tq)
 186                                 add_param(j, p, 0, NULL);
 187
 188                 /* Resolve any variable substitutions. */
 189                 pgen = 0;
 190                 TAILQ_FOREACH(p, &j->params, tq) {
 191                     p->gen = ++pgen;
 192                 find_vars:
 193                     TAILQ_FOREACH(s, &p->val, tq) {
 194                         varoff = 0;
 195                         while ((v = STAILQ_FIRST(&s->vars))) {
 196                                 TAILQ_FOREACH(vp, &j->params, tq)
 197                                         if (!strcmp(vp->name, v->name))
 198                                                 break;
 199                                 if (!vp) {
 200                                         jail_warnx(j,
 201                                             "%s: variable \"%s\" not found",
 202                                             p->name, v->name);
 203                                 bad_var:
 204                                         j->flags |= JF_FAILED;
 205                                         TAILQ_FOREACH(vp, &j->params, tq)
 206                                                 if (vp->gen == pgen)
 207                                                         vp->flags |= PF_BAD;
 208                                         goto free_var;
 209                                 }
 210                                 if (vp->flags & PF_BAD)
 211                                         goto bad_var;
 212                                 if (vp->gen == pgen) {
 213                                         jail_warnx(j, "%s: variable loop",
 214                                             v->name);
 215                                         goto bad_var;
 216                                 }
 217                                 TAILQ_FOREACH(vs, &vp->val, tq)
 218                                         if (!STAILQ_EMPTY(&vs->vars)) {
 219                                                 vp->gen = pgen;
 220                                                 TAILQ_REMOVE(&j->params, vp,
 221                                                     tq);
 222                                                 TAILQ_INSERT_BEFORE(p, vp, tq);
 223                                                 p = vp;
 224                                                 goto find_vars;
 225                                         }
 226                                 vs = TAILQ_FIRST(&vp->val);
 227                                 if (TAILQ_NEXT(vs, tq) != NULL &&
 228                                     (s->s[0] != '\0' ||
 229                                      STAILQ_NEXT(v, tq))) {
 230                                         jail_warnx(j, "%s: array cannot be "
 231                                             "substituted inline",
 232                                             p->name);
 233                                         goto bad_var;
 234                                 }
 235                                 s->s = erealloc(s->s, s->len + vs->len + 1);
 236                                 memmove(s->s + v->pos + varoff + vs->len,
 237                                     s->s + v->pos + varoff,
 238                                     s->len - (v->pos + varoff) + 1);
 239                                 memcpy(s->s + v->pos + varoff, vs->s, vs->len);
 240                                 varoff += vs->len;
 241                                 s->len += vs->len;
 242                                 while ((vs = TAILQ_NEXT(vs, tq))) {
 243                                         ns = emalloc(sizeof(struct cfstring));
 244                                         ns->s = estrdup(vs->s);
 245                                         ns->len = vs->len;
 246                                         STAILQ_INIT(&ns->vars);
 247                                         TAILQ_INSERT_AFTER(&p->val, s, ns, tq);
 248                                         s = ns;
 249                                 }
 250                         free_var:
 251                                 free(v->name);
 252                                 STAILQ_REMOVE_HEAD(&s->vars, tq);
 253                                 free(v);
 254                         }
 255                     }
 256                 }
 257
 258                 /* Free the jail's original parameter list and any variables. */
 259                 while ((p = TAILQ_FIRST(&opp)))
 260                         free_param(&opp, p);
 261                 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp)
 262                         if (p->flags & PF_VAR)
 263                                 free_param(&j->params, p);
 264         }
 265         while ((wj = TAILQ_FIRST(&wild))) {
 266                 free(wj->name);
 267                 while ((p = TAILQ_FIRST(&wj->params)))
 268                         free_param(&wj->params, p);
 269                 TAILQ_REMOVE(&wild, wj, tq);
 270         }
 271 }
 272
 273 /*
 274  * Create a new jail record.
 275  */
 276 struct cfjail *
 277 add_jail(void)
 278 {
 279         struct cfjail *j;
 280
 281         j = emalloc(sizeof(struct cfjail));
 282         memset(j, 0, sizeof(struct cfjail));
 283         TAILQ_INIT(&j->params);
 284         STAILQ_INIT(&j->dep[DEP_FROM]);
 285         STAILQ_INIT(&j->dep[DEP_TO]);
 286         j->queue = &cfjails;
 287         TAILQ_INSERT_TAIL(&cfjails, j, tq);
 288         return j;
 289 }
 290
 291 /*
 292  * Add a parameter to a jail.
 293  */
 294 void
 295 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum,
 296     const char *value)
 297 {
 298         struct cfstrings nss;
 299         struct cfparam *dp, *np;
 300         struct cfstring *s, *ns;
 301         struct cfvar *v, *nv;
 302         const char *name;
 303         char *cs, *tname;
 304         unsigned flags;
 305
 306         if (j == NULL) {
 307                 /* Create a single anonymous jail if one doesn't yet exist. */
 308                 j = TAILQ_LAST(&cfjails, cfjails);
 309                 if (j == NULL)
 310                         j = add_jail();
 311         }
 312         TAILQ_INIT(&nss);
 313         if (p != NULL) {
 314                 name = p->name;
 315                 flags = p->flags;
 316                 /*
 317                  * Make a copy of the parameter's string list,
 318                  * which may be freed if it's overridden later.
 319                  */
 320                 TAILQ_FOREACH(s, &p->val, tq) {
 321                         ns = emalloc(sizeof(struct cfstring));
 322                         ns->s = estrdup(s->s);
 323                         ns->len = s->len;
 324                         STAILQ_INIT(&ns->vars);
 325                         STAILQ_FOREACH(v, &s->vars, tq) {
 326                                 nv = emalloc(sizeof(struct cfvar));
 327                                 nv->name = strdup(v->name);
 328                                 nv->pos = v->pos;
 329                                 STAILQ_INSERT_TAIL(&ns->vars, nv, tq);
 330                         }
 331                         TAILQ_INSERT_TAIL(&nss, ns, tq);
 332                 }
 333         } else {
 334                 flags = PF_APPEND;
 335                 if (ipnum != IP__NULL) {
 336                         name = intparams[ipnum].name;
 337                         flags |= intparams[ipnum].flags;
 338                 } else if ((cs = strchr(value, '='))) {
 339                         tname = alloca(cs - value + 1);
 340                         strlcpy(tname, value, cs - value + 1);
 341                         name = tname;
 342                         value = cs + 1;
 343                 } else {
 344                         name = value;
 345                         value = NULL;
 346                 }
 347                 if (value != NULL) {
 348                         ns = emalloc(sizeof(struct cfstring));
 349                         ns->s = estrdup(value);
 350                         ns->len = strlen(value);
 351                         STAILQ_INIT(&ns->vars);
 352                         TAILQ_INSERT_TAIL(&nss, ns, tq);
 353                 }
 354         }
 355
 356         /* See if this parameter has already been added. */
 357         if (ipnum != IP__NULL)
 358                 dp = j->intparams[ipnum];
 359         else
 360                 TAILQ_FOREACH(dp, &j->params, tq)
 361                         if (!(dp->flags & PF_CONV) && equalopts(dp->name, name))
 362                                 break;
 363         if (dp != NULL) {
 364                 /* Found it - append or replace. */
 365                 if (strcmp(dp->name, name)) {
 366                         free(dp->name);
 367                         dp->name = estrdup(name);
 368                 }
 369                 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
 370                         free_param_strings(dp);
 371                 TAILQ_CONCAT(&dp->val, &nss, tq);
 372                 dp->flags |= flags;
 373         } else {
 374                 /* Not found - add it. */
 375                 np = emalloc(sizeof(struct cfparam));
 376                 np->name = estrdup(name);
 377                 TAILQ_INIT(&np->val);
 378                 TAILQ_CONCAT(&np->val, &nss, tq);
 379                 np->flags = flags;
 380                 np->gen = 0;
 381                 TAILQ_INSERT_TAIL(&j->params, np, tq);
 382                 if (ipnum != IP__NULL)
 383                         j->intparams[ipnum] = np;
 384                 else
 385                         for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++)
 386                                 if (!(intparams[ipnum].flags & PF_CONV) &&
 387                                     equalopts(name, intparams[ipnum].name)) {
 388                                         j->intparams[ipnum] = np;
 389                                         np->flags |= intparams[ipnum].flags;
 390                                         break;
 391                                 }
 392         }
 393 }
 394
 395 /*
 396  * Return if a boolean parameter exists and is true.
 397  */
 398 int
 399 bool_param(const struct cfparam *p)
 400 {
 401         const char *cs;
 402
 403         if (p == NULL)
 404                 return 0;
 405         cs = strrchr(p->name, '.');
 406         return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
 407             (TAILQ_EMPTY(&p->val) ||
 408              !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
 409              (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
 410 }
 411
 412 /*
 413  * Set an integer if a parameter if it exists.
 414  */
 415 int
 416 int_param(const struct cfparam *p, int *ip)
 417 {
 418         if (p == NULL || TAILQ_EMPTY(&p->val))
 419                 return 0;
 420         *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
 421         return 1;
 422 }
 423
 424 /*
 425  * Return the string value of a scalar parameter if it exists.
 426  */
 427 const char *
 428 string_param(const struct cfparam *p)
 429 {
 430         return (p && !TAILQ_EMPTY(&p->val)
 431             ? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
 432 }
 433
 434 /*
 435  * Check syntax and values of internal parameters.  Set some internal
 436  * parameters based on the values of others.
 437  */
 438 int
 439 check_intparams(struct cfjail *j)
 440 {
 441         struct cfparam *p;
 442         struct cfstring *s;
 443         FILE *f;
 444         const char *val;
 445         char *cs, *ep, *ln;
 446         size_t lnlen;
 447         int error;
 448 #if defined(INET) || defined(INET6)
 449         struct addrinfo hints;
 450         struct addrinfo *ai0, *ai;
 451         const char *hostname;
 452         int gicode, defif, prefix;
 453 #endif
 454 #ifdef INET
 455         struct in_addr addr4;
 456         int ip4ok;
 457         char avalue4[INET_ADDRSTRLEN];
 458 #endif
 459 #ifdef INET6
 460         struct in6_addr addr6;
 461         int ip6ok;
 462         char avalue6[INET6_ADDRSTRLEN];
 463 #endif
 464
 465         error = 0;
 466         /* Check format of boolan and integer values. */
 467         TAILQ_FOREACH(p, &j->params, tq) {
 468                 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
 469                         val = TAILQ_LAST(&p->val, cfstrings)->s;
 470                         if (p->flags & PF_BOOL) {
 471                                 if (strcasecmp(val, "false") &&
 472                                     strcasecmp(val, "true") &&
 473                                     ((void)strtol(val, &ep, 10), *ep)) {
 474                                         jail_warnx(j,
 475                                             "%s: unknown boolean value \"%s\"",
 476                                             p->name, val);
 477                                         error = -1;
 478                                 }
 479                         } else {
 480                                 (void)strtol(val, &ep, 10);
 481                                 if (ep == val || *ep) {
 482                                         jail_warnx(j,
 483                                             "%s: non-integer value \"%s\"",
 484                                             p->name, val);
 485                                         error = -1;
 486                                 }
 487                         }
 488                 }
 489         }
 490
 491 #if defined(INET) || defined(INET6)
 492         /*
 493          * The ip_hostname parameter looks up the hostname, and adds parameters
 494          * for any IP addresses it finds.
 495          */
 496         if (((j->flags & JF_OP_MASK) != JF_STOP ||
 497             j->intparams[IP_INTERFACE] != NULL) &&
 498             bool_param(j->intparams[IP_IP_HOSTNAME]) &&
 499             (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
 500                 j->intparams[IP_IP_HOSTNAME] = NULL;
 501                 /*
 502                  * Silently ignore unsupported address families from
 503                  * DNS lookups.
 504                  */
 505 #ifdef INET
 506                 ip4ok = feature_present("inet");
 507 #endif
 508 #ifdef INET6
 509                 ip6ok = feature_present("inet6");
 510 #endif
 511                 if (
 512 #if defined(INET) && defined(INET6)
 513                     ip4ok || ip6ok
 514 #elif defined(INET)
 515                     ip4ok
 516 #elif defined(INET6)
 517                     ip6ok
 518 #endif
 519                          ) {
 520                         /* Look up the hostname (or get the address) */
 521                         memset(&hints, 0, sizeof(hints));
 522                         hints.ai_socktype = SOCK_STREAM;
 523                         hints.ai_family =
 524 #if defined(INET) && defined(INET6)
 525                             ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) :  PF_INET6;
 526 #elif defined(INET)
 527                             PF_INET;
 528 #elif defined(INET6)
 529                             PF_INET6;
 530 #endif
 531                         gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
 532                         if (gicode != 0) {
 533                                 jail_warnx(j, "host.hostname %s: %s", hostname,
 534                                     gai_strerror(gicode));
 535                                 error = -1;
 536                         } else {
 537                                 /*
 538                                  * Convert the addresses to ASCII so jailparam
 539                                  * can convert them back.  Errors are not
 540                                  * expected here.
 541                                  */
 542                                 for (ai = ai0; ai; ai = ai->ai_next)
 543                                         switch (ai->ai_family) {
 544 #ifdef INET
 545                                         case AF_INET:
 546                                                 memcpy(&addr4,
 547                                                     &((struct sockaddr_in *)
 548                                                     (void *)ai->ai_addr)->
 549                                                     sin_addr, sizeof(addr4));
 550                                                 if (inet_ntop(AF_INET,
 551                                                     &addr4, avalue4,
 552                                                     INET_ADDRSTRLEN) == NULL)
 553                                                         err(1, "inet_ntop");
 554                                                 add_param(j, NULL, KP_IP4_ADDR,
 555                                                     avalue4);
 556                                                 break;
 557 #endif
 558 #ifdef INET6
 559                                         case AF_INET6:
 560                                                 memcpy(&addr6,
 561                                                     &((struct sockaddr_in6 *)
 562                                                     (void *)ai->ai_addr)->
 563                                                     sin6_addr, sizeof(addr6));
 564                                                 if (inet_ntop(AF_INET6,
 565                                                     &addr6, avalue6,
 566                                                     INET6_ADDRSTRLEN) == NULL)
 567                                                         err(1, "inet_ntop");
 568                                                 add_param(j, NULL, KP_IP6_ADDR,
 569                                                     avalue6);
 570                                                 break;
 571 #endif
 572                                         }
 573                                 freeaddrinfo(ai0);
 574                         }
 575                 }
 576         }
 577
 578         /*
 579          * IP addresses may include an interface to set that address on,
 580          * a netmask/suffix for that address and options for ifconfig.
 581          * These are copied to an internal command parameter and then stripped
 582          * so they won't be passed on to jailparam_set.
 583          */
 584         defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
 585 #ifdef INET
 586         if (j->intparams[KP_IP4_ADDR] != NULL) {
 587                 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
 588                         cs = strchr(s->s, '|');
 589                         if (cs || defif)
 590                                 add_param(j, NULL, IP__IP4_IFADDR, s->s);
 591                         if (cs) {
 592                                 strcpy(s->s, cs + 1);
 593                                 s->len -= cs + 1 - s->s;
 594                         }
 595                         if ((cs = strchr(s->s, '/'))) {
 596                                 prefix = strtol(cs + 1, &ep, 10);
 597                                 if (*ep == '.'
 598                                     ? inet_pton(AF_INET, cs + 1, &addr4) != 1
 599                                     : *ep || prefix < 0 || prefix > 32) {
 600                                         jail_warnx(j,
 601                                             "ip4.addr: bad netmask \"%s\"", cs);
 602                                         error = -1;
 603                                 }
 604                                 *cs = '\0';
 605                                 s->len = cs - s->s;
 606                         }
 607                         if ((cs = strchr(s->s, ' ')) != NULL) {
 608                                 *cs = '\0';
 609                                 s->len = cs - s->s;
 610                         }
 611                 }
 612         }
 613 #endif
 614 #ifdef INET6
 615         if (j->intparams[KP_IP6_ADDR] != NULL) {
 616                 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
 617                         cs = strchr(s->s, '|');
 618                         if (cs || defif)
 619                                 add_param(j, NULL, IP__IP6_IFADDR, s->s);
 620                         if (cs) {
 621                                 strcpy(s->s, cs + 1);
 622                                 s->len -= cs + 1 - s->s;
 623                         }
 624                         if ((cs = strchr(s->s, '/'))) {
 625                                 prefix = strtol(cs + 1, &ep, 10);
 626                                 if (*ep || prefix < 0 || prefix > 128) {
 627                                         jail_warnx(j,
 628                                             "ip6.addr: bad prefixlen \"%s\"",
 629                                             cs);
 630                                         error = -1;
 631                                 }
 632                                 *cs = '\0';
 633                                 s->len = cs - s->s;
 634                         }
 635                         if ((cs = strchr(s->s, ' ')) != NULL) {
 636                                 *cs = '\0';
 637                                 s->len = cs - s->s;
 638                         }
 639                 }
 640         }
 641 #endif
 642 #endif
 643
 644         /*
 645          * Read mount.fstab file(s), and treat each line as its own mount
 646          * parameter.
 647          */
 648         if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
 649                 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
 650                         if (s->len == 0)
 651                                 continue;
 652                         f = fopen(s->s, "r");
 653                         if (f == NULL) {
 654                                 jail_warnx(j, "mount.fstab: %s: %s",
 655                                     s->s, strerror(errno));
 656                                 error = -1;
 657                                 continue;
 658                         }
 659                         while ((ln = fgetln(f, &lnlen))) {
 660                                 if ((cs = memchr(ln, '#', lnlen - 1)))
 661                                         lnlen = cs - ln + 1;
 662                                 if (ln[lnlen - 1] == '\n' ||
 663                                     ln[lnlen - 1] == '#')
 664                                         ln[lnlen - 1] = '\0';
 665                                 else {
 666                                         cs = alloca(lnlen + 1);
 667                                         strlcpy(cs, ln, lnlen + 1);
 668                                         ln = cs;
 669                                 }
 670                                 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
 671                         }
 672                         fclose(f);
 673                 }
 674         }
 675         if (error)
 676                 failed(j);
 677         return error;
 678 }
 679
 680 /*
 681  * Import parameters into libjail's binary jailparam format.
 682  */
 683 int
 684 import_params(struct cfjail *j)
 685 {
 686         struct cfparam *p;
 687         struct cfstring *s, *ts;
 688         struct jailparam *jp;
 689         char *value, *cs;
 690         size_t vallen;
 691         int error;
 692
 693         error = 0;
 694         j->njp = 0;
 695         TAILQ_FOREACH(p, &j->params, tq)
 696                 if (!(p->flags & PF_INTERNAL))
 697                         j->njp++;
 698         j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
 699         TAILQ_FOREACH(p, &j->params, tq) {
 700                 if (p->flags & PF_INTERNAL)
 701                         continue;
 702                 if (jailparam_init(jp, p->name) < 0) {
 703                         error = -1;
 704                         jail_warnx(j, "%s", jail_errmsg);
 705                         jp++;
 706                         continue;
 707                 }
 708                 if (TAILQ_EMPTY(&p->val))
 709                         value = NULL;
 710                 else if (!jp->jp_elemlen ||
 711                          !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
 712                         /*
 713                          * Scalar parameters silently discard multiple (array)
 714                          * values, keeping only the last value added.  This
 715                          * lets values added from the command line append to
 716                          * arrays wthout pre-checking the type.
 717                          */
 718                         value = TAILQ_LAST(&p->val, cfstrings)->s;
 719                 } else {
 720                         /*
 721                          * Convert arrays into comma-separated strings, which
 722                          * jailparam_import will then convert back into arrays.
 723                          */
 724                         vallen = 0;
 725                         TAILQ_FOREACH(s, &p->val, tq)
 726                                 vallen += s->len + 1;
 727                         value = alloca(vallen);
 728                         cs = value;
 729                         TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
 730                                 memcpy(cs, s->s, s->len);
 731                                 cs += s->len + 1;
 732                                 cs[-1] = ',';
 733                         }
 734                         value[vallen - 1] = '\0';
 735                 }
 736                 if (jailparam_import(jp, value) < 0) {
 737                         error = -1;
 738                         jail_warnx(j, "%s", jail_errmsg);
 739                 }
 740                 jp++;
 741         }
 742         if (error) {
 743                 jailparam_free(j->jp, j->njp);
 744                 free(j->jp);
 745                 j->jp = NULL;
 746                 failed(j);
 747         }
 748         return error;
 749 }
 750
 751 /*
 752  * Check if options are equal (with or without the "no" prefix).
 753  */
 754 int
 755 equalopts(const char *opt1, const char *opt2)
 756 {
 757         char *p;
 758
 759         /* "opt" vs. "opt" or "noopt" vs. "noopt" */
 760         if (strcmp(opt1, opt2) == 0)
 761                 return (1);
 762         /* "noopt" vs. "opt" */
 763         if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
 764                 return (1);
 765         /* "opt" vs. "noopt" */
 766         if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
 767                 return (1);
 768         while ((p = strchr(opt1, '.')) != NULL &&
 769             !strncmp(opt1, opt2, ++p - opt1)) {
 770                 opt2 += p - opt1;
 771                 opt1 = p;
 772                 /* "foo.noopt" vs. "foo.opt" */
 773                 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
 774                         return (1);
 775                 /* "foo.opt" vs. "foo.noopt" */
 776                 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
 777                         return (1);
 778         }
 779         return (0);
 780 }
 781
 782 /*
 783  * See if a jail name matches a wildcard.
 784  */
 785 int
 786 wild_jail_match(const char *jname, const char *wname)
 787 {
 788         const char *jc, *jd, *wc, *wd;
 789
 790         /*
 791          * A non-final "*" component in the wild name matches a single jail
 792          * component, and a final "*" matches one or more jail components.
 793          */
 794         for (jc = jname, wc = wname;
 795              (jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
 796              jc = jd + 1, wc = wd + 1)
 797                 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
 798                         return 0;
 799         return (!strcmp(jc, wc) || !strcmp(wc, "*"));
 800 }
 801
 802 /*
 803  * Return if a jail name is a wildcard.
 804  */
 805 int
 806 wild_jail_name(const char *wname)
 807 {
 808         const char *wc;
 809
 810         for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
 811                 if ((wc == wname || wc[-1] == '.') &&
 812                     (wc[1] == '\0' || wc[1] == '.'))
 813                         return 1;
 814         return 0;
 815 }
 816
 817 /*
 818  * Free a parameter record and all its strings and variables.
 819  */
 820 static void
 821 free_param(struct cfparams *pp, struct cfparam *p)
 822 {
 823         free(p->name);
 824         free_param_strings(p);
 825         TAILQ_REMOVE(pp, p, tq);
 826         free(p);
 827 }
 828
 829 static void
 830 free_param_strings(struct cfparam *p)
 831 {
 832         struct cfstring *s;
 833         struct cfvar *v;
 834
 835         while ((s = TAILQ_FIRST(&p->val))) {
 836                 free(s->s);
 837                 while ((v = STAILQ_FIRST(&s->vars))) {
 838                         free(v->name);
 839                         STAILQ_REMOVE_HEAD(&s->vars, tq);
 840                         free(v);
 841                 }
 842                 TAILQ_REMOVE(&p->val, s, tq);
 843                 free(s);
 844         }
 845 }