src/pluto/plutomain.c

   1 /* Pluto main program
   2  * Copyright (C) 1997 Angelos D. Keromytis.
   3  * Copyright (C) 1998-2001 D. Hugh Redelmeier.
   4  * Copyright (C) 2009 Andreas Steffen - Hochschule fuer Technik Rapperswil
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <ctype.h>
  21 #include <errno.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <sys/un.h>
  26 #include <fcntl.h>
  27 #include <getopt.h>
  28 #include <resolv.h>
  29 #include <arpa/nameser.h>       /* missing from <resolv.h> on old systems */
  30 #include <sys/queue.h>
  31 #include <sys/prctl.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34
  35 #ifdef CAPABILITIES
  36 #include <sys/capability.h>
  37 #endif /* CAPABILITIES */
  38
  39 #include <freeswan.h>
  40
  41 #include <library.h>
  42 #include <debug.h>
  43 #include <utils/enumerator.h>
  44 #include <utils/optionsfrom.h>
  45
  46 #include <pfkeyv2.h>
  47 #include <pfkey.h>
  48
  49 #include "constants.h"
  50 #include "defs.h"
  51 #include "id.h"
  52 #include "ca.h"
  53 #include "certs.h"
  54 #include "ac.h"
  55 #include "connections.h"
  56 #include "foodgroups.h"
  57 #include "packet.h"
  58 #include "demux.h"      /* needs packet.h */
  59 #include "server.h"
  60 #include "kernel.h"
  61 #include "log.h"
  62 #include "keys.h"
  63 #include "adns.h"       /* needs <resolv.h> */
  64 #include "dnskey.h"     /* needs keys.h and adns.h */
  65 #include "state.h"
  66 #include "ipsec_doi.h"  /* needs demux.h and state.h */
  67 #include "ocsp.h"
  68 #include "crl.h"
  69 #include "fetch.h"
  70 #include "xauth.h"
  71 #include "crypto.h"
  72 #include "nat_traversal.h"
  73 #include "virtual.h"
  74 #include "timer.h"
  75 #include "vendor.h"
  76
  77 static void usage(const char *mess)
  78 {
  79         if (mess != NULL && *mess != '\0')
  80                 fprintf(stderr, "%s\n", mess);
  81         fprintf(stderr
  82                 , "Usage: pluto"
  83                         " [--help]"
  84                         " [--version]"
  85                         " [--optionsfrom <filename>]"
  86                         " \\\n\t"
  87                         "[--nofork]"
  88                         " [--stderrlog]"
  89                         " [--noklips]"
  90                         " [--nocrsend]"
  91                         " \\\n\t"
  92                         "[--strictcrlpolicy]"
  93                         " [--crlcheckinterval <interval>]"
  94                         " [--cachecrls]"
  95                         " [--uniqueids]"
  96                         " \\\n\t"
  97                         "[--interface <ifname>]"
  98                         " [--ikeport <port-number>]"
  99                         " \\\n\t"
 100                         "[--ctlbase <path>]"
 101                         " \\\n\t"
 102                         "[--perpeerlogbase <path>] [--perpeerlog]"
 103                         " \\\n\t"
 104                         "[--secretsfile <secrets-file>]"
 105                         " [--policygroupsdir <policygroups-dir>]"
 106                         " \\\n\t"
 107                         "[--adns <pathname>]"
 108                         "[--pkcs11module <path>]"
 109                         "[--pkcs11keepstate]"
 110                         "[--pkcs11initargs <string>]"
 111 #ifdef DEBUG
 112                         " \\\n\t"
 113                         "[--debug-none]"
 114                         " [--debug-all]"
 115                         " \\\n\t"
 116                         "[--debug-raw]"
 117                         " [--debug-crypt]"
 118                         " [--debug-parsing]"
 119                         " [--debug-emitting]"
 120                         " \\\n\t"
 121                         "[--debug-control]"
 122                         " [--debug-lifecycle]"
 123                         " [--debug-klips]"
 124                         " [--debug-dns]"
 125                         " \\\n\t"
 126                         "[--debug-oppo]"
 127                         " [--debug-controlmore]"
 128                         " [--debug-private]"
 129                         " [--debug-natt]"
 130 #endif
 131                     " \\\n\t"
 132                         "[--nat_traversal] [--keep_alive <delay_sec>]"
 133                         " \\\n\t"
 134                         "[--force_keepalive] [--disable_port_floating]"
 135                     " \\\n\t"
 136                     "[--virtual_private <network_list>]"
 137                         "\n"
 138                     "strongSwan "VERSION"\n");
 139         exit_pluto(mess == NULL? 0 : 1);
 140 }
 141
 142
 143 /* lock file support
 144  * - provides convenient way for scripts to find Pluto's pid
 145  * - prevents multiple Plutos competing for the same port
 146  * - same basename as unix domain control socket
 147  * NOTE: will not take account of sharing LOCK_DIR with other systems.
 148  */
 149
 150 static char pluto_lock[sizeof(ctl_addr.sun_path)] = DEFAULT_CTLBASE LOCK_SUFFIX;
 151 static bool pluto_lock_created = FALSE;
 152
 153 /* create lockfile, or die in the attempt */
 154 static int create_lock(void)
 155 {
 156         int fd = open(pluto_lock, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC
 157                 , S_IRUSR | S_IRGRP | S_IROTH);
 158
 159         if (fd < 0)
 160         {
 161                 if (errno == EEXIST)
 162                 {
 163                         fprintf(stderr, "pluto: lock file \"%s\" already exists\n"
 164                                 , pluto_lock);
 165                         exit_pluto(10);
 166                 }
 167                 else
 168                 {
 169                         fprintf(stderr
 170                                 , "pluto: unable to create lock file \"%s\" (%d %s)\n"
 171                                 , pluto_lock, errno, strerror(errno));
 172                         exit_pluto(1);
 173                 }
 174         }
 175         pluto_lock_created = TRUE;
 176         return fd;
 177 }
 178
 179 static bool fill_lock(int lockfd, pid_t pid)
 180 {
 181         char buf[30];       /* holds "<pid>\n" */
 182         int len = snprintf(buf, sizeof(buf), "%u\n", (unsigned int) pid);
 183         bool ok = len > 0 && write(lockfd, buf, len) == len;
 184
 185         close(lockfd);
 186         return ok;
 187 }
 188
 189 static void delete_lock(void)
 190 {
 191         if (pluto_lock_created)
 192         {
 193                 delete_ctl_socket();
 194                 unlink(pluto_lock);     /* is noting failure useful? */
 195         }
 196 }
 197
 198
 199 /* by default pluto sends certificate requests to its peers */
 200 bool no_cr_send = FALSE;
 201
 202 /* by default the CRL policy is lenient */
 203 bool strict_crl_policy = FALSE;
 204
 205 /* by default CRLs are cached locally as files */
 206 bool cache_crls = FALSE;
 207
 208 /* by default pluto does not check crls dynamically */
 209 long crl_check_interval = 0;
 210
 211 /* path to the PKCS#11 module */
 212 char *pkcs11_module_path = NULL;
 213
 214 /* by default pluto logs out after every smartcard use */
 215 bool pkcs11_keep_state = FALSE;
 216
 217 /* by default pluto does not allow pkcs11 proxy access via whack */
 218 bool pkcs11_proxy = FALSE;
 219
 220 /* argument string to pass to PKCS#11 module.
 221  * Not used for compliant modules, just for NSS softoken
 222  */
 223 static const char *pkcs11_init_args = NULL;
 224
 225 /* options read by optionsfrom */
 226 options_t *options;
 227
 228 /**
 229  * Log loaded plugins
 230  */
 231 static void print_plugins()
 232 {
 233         char buf[BUF_LEN], *plugin;
 234         int len = 0;
 235         enumerator_t *enumerator;
 236
 237         buf[0] = '\0';
 238         enumerator = lib->plugins->create_plugin_enumerator(lib->plugins);
 239         while (len < BUF_LEN && enumerator->enumerate(enumerator, &plugin))
 240         {
 241                 len += snprintf(&buf[len], BUF_LEN-len, "%s ", plugin);
 242         }
 243         enumerator->destroy(enumerator);
 244         DBG1("loaded plugins: %s", buf);
 245 }
 246
 247 int main(int argc, char **argv)
 248 {
 249         bool fork_desired = TRUE;
 250         bool log_to_stderr_desired = FALSE;
 251         bool nat_traversal = FALSE;
 252         bool nat_t_spf = TRUE;  /* support port floating */
 253         unsigned int keep_alive = 0;
 254         bool force_keepalive = FALSE;
 255         char *virtual_private = NULL;
 256         int lockfd;
 257 #ifdef CAPABILITIES
 258         cap_t caps;
 259         int keep[] = { CAP_NET_ADMIN, CAP_NET_BIND_SERVICE };
 260 #endif /* CAPABILITIES */
 261
 262         /* initialize library and optionsfrom */
 263         if (!library_init(STRONGSWAN_CONF))
 264         {
 265                 abort();
 266         }
 267         options = options_create();
 268
 269         /* handle arguments */
 270         for (;;)
 271         {
 272 #       define DBG_OFFSET 256
 273                 static const struct option long_opts[] = {
 274                         /* name, has_arg, flag, val */
 275                         { "help", no_argument, NULL, 'h' },
 276                         { "version", no_argument, NULL, 'v' },
 277                         { "optionsfrom", required_argument, NULL, '+' },
 278                         { "nofork", no_argument, NULL, 'd' },
 279                         { "stderrlog", no_argument, NULL, 'e' },
 280                         { "noklips", no_argument, NULL, 'n' },
 281                         { "nocrsend", no_argument, NULL, 'c' },
 282                         { "strictcrlpolicy", no_argument, NULL, 'r' },
 283                         { "crlcheckinterval", required_argument, NULL, 'x'},
 284                         { "cachecrls", no_argument, NULL, 'C' },
 285                         { "uniqueids", no_argument, NULL, 'u' },
 286                         { "interface", required_argument, NULL, 'i' },
 287                         { "ikeport", required_argument, NULL, 'p' },
 288                         { "ctlbase", required_argument, NULL, 'b' },
 289                         { "secretsfile", required_argument, NULL, 's' },
 290                         { "foodgroupsdir", required_argument, NULL, 'f' },
 291                         { "perpeerlogbase", required_argument, NULL, 'P' },
 292                         { "perpeerlog", no_argument, NULL, 'l' },
 293                         { "policygroupsdir", required_argument, NULL, 'f' },
 294 #ifdef USE_LWRES
 295                         { "lwdnsq", required_argument, NULL, 'a' },
 296 #else /* !USE_LWRES */
 297                         { "adns", required_argument, NULL, 'a' },
 298 #endif /* !USE_LWRES */
 299                         { "pkcs11module", required_argument, NULL, 'm' },
 300                         { "pkcs11keepstate", no_argument, NULL, 'k' },
 301                         { "pkcs11initargs", required_argument, NULL, 'z' },
 302                         { "pkcs11proxy", no_argument, NULL, 'y' },
 303                         { "nat_traversal", no_argument, NULL, '1' },
 304                         { "keep_alive", required_argument, NULL, '2' },
 305                         { "force_keepalive", no_argument, NULL, '3' },
 306                         { "disable_port_floating", no_argument, NULL, '4' },
 307                         { "debug-natt", no_argument, NULL, '5' },
 308                         { "virtual_private", required_argument, NULL, '6' },
 309 #ifdef DEBUG
 310                         { "debug-none", no_argument, NULL, 'N' },
 311                         { "debug-all", no_argument, NULL, 'A' },
 312                         { "debug-raw", no_argument, NULL, DBG_RAW + DBG_OFFSET },
 313                         { "debug-crypt", no_argument, NULL, DBG_CRYPT + DBG_OFFSET },
 314                         { "debug-parsing", no_argument, NULL, DBG_PARSING + DBG_OFFSET },
 315                         { "debug-emitting", no_argument, NULL, DBG_EMITTING + DBG_OFFSET },
 316                         { "debug-control", no_argument, NULL, DBG_CONTROL + DBG_OFFSET },
 317                         { "debug-lifecycle", no_argument, NULL, DBG_LIFECYCLE + DBG_OFFSET },
 318                         { "debug-klips", no_argument, NULL, DBG_KLIPS + DBG_OFFSET },
 319                         { "debug-dns", no_argument, NULL, DBG_DNS + DBG_OFFSET },
 320                         { "debug-oppo", no_argument, NULL, DBG_OPPO + DBG_OFFSET },
 321                         { "debug-controlmore", no_argument, NULL, DBG_CONTROLMORE + DBG_OFFSET },
 322                         { "debug-private", no_argument, NULL, DBG_PRIVATE + DBG_OFFSET },
 323
 324                         { "impair-delay-adns-key-answer", no_argument, NULL, IMPAIR_DELAY_ADNS_KEY_ANSWER + DBG_OFFSET },
 325                         { "impair-delay-adns-txt-answer", no_argument, NULL, IMPAIR_DELAY_ADNS_TXT_ANSWER + DBG_OFFSET },
 326                         { "impair-bust-mi2", no_argument, NULL, IMPAIR_BUST_MI2 + DBG_OFFSET },
 327                         { "impair-bust-mr2", no_argument, NULL, IMPAIR_BUST_MR2 + DBG_OFFSET },
 328 #endif
 329                         { 0,0,0,0 }
 330                         };
 331                 /* Note: we don't like the way short options get parsed
 332                  * by getopt_long, so we simply pass an empty string as
 333                  * the list.  It could be "hvdenp:l:s:" "NARXPECK".
 334                  */
 335                 int c = getopt_long(argc, argv, "", long_opts, NULL);
 336
 337                 /* Note: "breaking" from case terminates loop */
 338                 switch (c)
 339                 {
 340                 case EOF:       /* end of flags */
 341                         break;
 342
 343                 case 0: /* long option already handled */
 344                         continue;
 345
 346                 case ':':       /* diagnostic already printed by getopt_long */
 347                 case '?':       /* diagnostic already printed by getopt_long */
 348                         usage("");
 349                         break;   /* not actually reached */
 350
 351                 case 'h':       /* --help */
 352                         usage(NULL);
 353                         break;      /* not actually reached */
 354
 355                 case 'v':       /* --version */
 356                         {
 357                                 const char **sp = ipsec_copyright_notice();
 358
 359                                 printf("strongSwan "VERSION"%s\n", compile_time_interop_options);
 360                                 for (; *sp != NULL; sp++)
 361                                         puts(*sp);
 362                         }
 363                         exit_pluto(0);
 364                         break;      /* not actually reached */
 365
 366                 case '+':       /* --optionsfrom <filename> */
 367                         if (!options->from(options, optarg, &argc, &argv, optind))
 368                         {
 369                                 exit_pluto(1);
 370                         }
 371                         continue;
 372
 373                 case 'd':       /* --nofork*/
 374                         fork_desired = FALSE;
 375                         continue;
 376
 377                 case 'e':       /* --stderrlog */
 378                         log_to_stderr_desired = TRUE;
 379                         continue;
 380
 381                 case 'n':       /* --noklips */
 382                         no_klips = TRUE;
 383                         continue;
 384
 385                 case 'c':       /* --nocrsend */
 386                         no_cr_send = TRUE;
 387                         continue;
 388
 389                 case 'r':       /* --strictcrlpolicy */
 390                         strict_crl_policy = TRUE;
 391                         continue;
 392
 393                 case 'x':       /* --crlcheckinterval <time>*/
 394                         if (optarg == NULL || !isdigit(optarg[0]))
 395                                 usage("missing interval time");
 396
 397                         {
 398                                 char *endptr;
 399                                 long interval = strtol(optarg, &endptr, 0);
 400
 401                                 if (*endptr != '\0' || endptr == optarg
 402                                 || interval <= 0)
 403                                         usage("<interval-time> must be a positive number");
 404                                 crl_check_interval = interval;
 405                         }
 406                         continue;
 407
 408                 case 'C':       /* --cachecrls */
 409                         cache_crls = TRUE;
 410                         continue;
 411
 412                 case 'u':       /* --uniqueids */
 413                         uniqueIDs = TRUE;
 414                         continue;
 415
 416                 case 'i':       /* --interface <ifname> */
 417                         if (!use_interface(optarg))
 418                                 usage("too many --interface specifications");
 419                         continue;
 420
 421                 case 'p':       /* --port <portnumber> */
 422                         if (optarg == NULL || !isdigit(optarg[0]))
 423                                 usage("missing port number");
 424
 425                         {
 426                                 char *endptr;
 427                                 long port = strtol(optarg, &endptr, 0);
 428
 429                                 if (*endptr != '\0' || endptr == optarg
 430                                 || port <= 0 || port > 0x10000)
 431                                         usage("<port-number> must be a number between 1 and 65535");
 432                                 pluto_port = port;
 433                         }
 434                         continue;
 435
 436                 case 'b':       /* --ctlbase <path> */
 437                         if (snprintf(ctl_addr.sun_path, sizeof(ctl_addr.sun_path)
 438                         , "%s%s", optarg, CTL_SUFFIX) == -1)
 439                                 usage("<path>" CTL_SUFFIX " too long for sun_path");
 440                         if (snprintf(info_addr.sun_path, sizeof(info_addr.sun_path)
 441                         , "%s%s", optarg, INFO_SUFFIX) == -1)
 442                                 usage("<path>" INFO_SUFFIX " too long for sun_path");
 443                         if (snprintf(pluto_lock, sizeof(pluto_lock)
 444                         , "%s%s", optarg, LOCK_SUFFIX) == -1)
 445                                 usage("<path>" LOCK_SUFFIX " must fit");
 446                         continue;
 447
 448                 case 's':       /* --secretsfile <secrets-file> */
 449                         shared_secrets_file = optarg;
 450                         continue;
 451
 452                 case 'f':       /* --policygroupsdir <policygroups-dir> */
 453                         policygroups_dir = optarg;
 454                         continue;
 455
 456                 case 'a':       /* --adns <pathname> */
 457                         pluto_adns_option = optarg;
 458                         continue;
 459
 460                 case 'm':       /* --pkcs11module <pathname> */
 461                         pkcs11_module_path = optarg;
 462                         continue;
 463
 464                 case 'k':       /* --pkcs11keepstate */
 465                         pkcs11_keep_state = TRUE;
 466                         continue;
 467
 468                 case 'y':       /* --pkcs11proxy */
 469                         pkcs11_proxy = TRUE;
 470                         continue;
 471
 472                 case 'z':       /* --pkcs11initargs */
 473                         pkcs11_init_args = optarg;
 474                         continue;
 475
 476 #ifdef DEBUG
 477                 case 'N':       /* --debug-none */
 478                         base_debugging = DBG_NONE;
 479                         continue;
 480
 481                 case 'A':       /* --debug-all */
 482                         base_debugging = DBG_ALL;
 483                         continue;
 484 #endif
 485
 486                 case 'P':       /* --perpeerlogbase */
 487                         base_perpeer_logdir = optarg;
 488                         continue;
 489
 490                 case 'l':
 491                         log_to_perpeer = TRUE;
 492                         continue;
 493
 494                 case '1':       /* --nat_traversal */
 495                         nat_traversal = TRUE;
 496                         continue;
 497                 case '2':       /* --keep_alive */
 498                         keep_alive = atoi(optarg);
 499                         continue;
 500                 case '3':       /* --force_keepalive */
 501                         force_keepalive = TRUE;
 502                         continue;
 503                 case '4':       /* --disable_port_floating */
 504                         nat_t_spf = FALSE;
 505                         continue;
 506                 case '5':       /* --debug-nat_t */
 507                         base_debugging |= DBG_NATT;
 508                         continue;
 509                 case '6':       /* --virtual_private */
 510                         virtual_private = optarg;
 511                         continue;
 512
 513                 default:
 514 #ifdef DEBUG
 515                         if (c >= DBG_OFFSET)
 516                         {
 517                                 base_debugging |= c - DBG_OFFSET;
 518                                 continue;
 519                         }
 520 #       undef DBG_OFFSET
 521 #endif
 522                         bad_case(c);
 523                 }
 524                 break;
 525         }
 526         if (optind != argc)
 527                 usage("unexpected argument");
 528         reset_debugging();
 529         lockfd = create_lock();
 530
 531         /* select between logging methods */
 532
 533         if (log_to_stderr_desired)
 534         {
 535                 log_to_syslog = FALSE;
 536         }
 537         else
 538         {
 539                 log_to_stderr = FALSE;
 540         }
 541
 542         /* set the logging function of pfkey debugging */
 543 #ifdef DEBUG
 544         pfkey_debug_func = DBG_log;
 545 #else
 546         pfkey_debug_func = NULL;
 547 #endif
 548
 549         /* create control socket.
 550          * We must create it before the parent process returns so that
 551          * there will be no race condition in using it.  The easiest
 552          * place to do this is before the daemon fork.
 553          */
 554         {
 555                 err_t ugh = init_ctl_socket();
 556
 557                 if (ugh != NULL)
 558                 {
 559                         fprintf(stderr, "pluto: %s", ugh);
 560                         exit_pluto(1);
 561                 }
 562         }
 563
 564         /* If not suppressed, do daemon fork */
 565
 566         if (fork_desired)
 567         {
 568                 {
 569                         pid_t pid = fork();
 570
 571                         if (pid < 0)
 572                         {
 573                                 int e = errno;
 574
 575                                 fprintf(stderr, "pluto: fork failed (%d %s)\n",
 576                                         errno, strerror(e));
 577                                 exit_pluto(1);
 578                         }
 579
 580                         if (pid != 0)
 581                         {
 582                                 /* parent: die, after filling PID into lock file.
 583                                  * must not use exit_pluto: lock would be removed!
 584                                  */
 585                                 exit(fill_lock(lockfd, pid)? 0 : 1);
 586                         }
 587                 }
 588
 589                 if (setsid() < 0)
 590                 {
 591                         int e = errno;
 592
 593                         fprintf(stderr, "setsid() failed in main(). Errno %d: %s\n",
 594                                 errno, strerror(e));
 595                         exit_pluto(1);
 596                 }
 597         }
 598         else
 599         {
 600                 /* no daemon fork: we have to fill in lock file */
 601                 (void) fill_lock(lockfd, getpid());
 602                 fprintf(stdout, "Pluto initialized\n");
 603                 fflush(stdout);
 604         }
 605
 606         /* Close everything but ctl_fd and (if needed) stderr.
 607          * There is some danger that a library that we don't know
 608          * about is using some fd that we don't know about.
 609          * I guess we'll soon find out.
 610          */
 611         {
 612                 int i;
 613
 614                 for (i = getdtablesize() - 1; i >= 0; i--)  /* Bad hack */
 615                 {
 616                         if ((!log_to_stderr || i != 2) && i != ctl_fd)
 617                                 close(i);
 618                 }
 619
 620                 /* make sure that stdin, stdout, stderr are reserved */
 621                 if (open("/dev/null", O_RDONLY) != 0)
 622                         abort();
 623                 if (dup2(0, 1) != 1)
 624                         abort();
 625                 if (!log_to_stderr && dup2(0, 2) != 2)
 626                         abort();
 627         }
 628
 629         init_constants();
 630         init_log("pluto");
 631
 632         /* Note: some scripts may look for this exact message -- don't change
 633          * ipsec barf was one, but it no longer does.
 634          */
 635         plog("Starting IKEv1 pluto daemon (strongSwan "VERSION")%s",
 636                  compile_time_interop_options);
 637
 638         /* load plugins, further infrastructure may need it */
 639         lib->plugins->load(lib->plugins, IPSEC_PLUGINDIR,
 640                 lib->settings->get_str(lib->settings, "pluto.load", PLUGINS));
 641         print_plugins();
 642
 643         init_nat_traversal(nat_traversal, keep_alive, force_keepalive, nat_t_spf);
 644         init_virtual_ip(virtual_private);
 645         scx_init(pkcs11_module_path, pkcs11_init_args);
 646         xauth_init();
 647         init_secret();
 648         init_states();
 649         init_crypto();
 650         init_demux();
 651         init_kernel();
 652         init_adns();
 653         init_id();
 654         init_fetch();
 655
 656         /* drop unneeded capabilities and change UID/GID */
 657         prctl(PR_SET_KEEPCAPS, 1);
 658
 659 #ifdef IPSEC_GROUP
 660         {
 661                 struct group group, *grp;
 662         char buf[1024];
 663
 664                 if (getgrnam_r(IPSEC_GROUP, &group, buf, sizeof(buf), &grp) != 0 ||
 665                                 grp == NULL || setgid(grp->gr_gid) != 0)
 666                 {
 667                         plog("unable to change daemon group");
 668                         abort();
 669                 }
 670         }
 671 #endif
 672 #ifdef IPSEC_USER
 673         {
 674                 struct passwd passwd, *pwp;
 675         char buf[1024];
 676
 677                 if (getpwnam_r(IPSEC_USER, &passwd, buf, sizeof(buf), &pwp) != 0 ||
 678                                 pwp == NULL || setuid(pwp->pw_uid) != 0)
 679                 {
 680                         plog("unable to change daemon user");
 681                         abort();
 682                 }
 683                 }
 684 #endif
 685
 686 #ifdef CAPABILITIES
 687         caps = cap_init();
 688         cap_set_flag(caps, CAP_EFFECTIVE, 2, keep, CAP_SET);
 689         cap_set_flag(caps, CAP_INHERITABLE, 2, keep, CAP_SET);
 690         cap_set_flag(caps, CAP_PERMITTED, 2, keep, CAP_SET);
 691         if (cap_set_proc(caps) != 0)
 692         {
 693                 plog("unable to drop daemon capabilities");
 694                 abort();
 695         }
 696         cap_free(caps);
 697 #endif /* CAPABILITIES */
 698
 699         /* loading X.509 CA certificates */
 700         load_authcerts("CA cert", CA_CERT_PATH, AUTH_CA);
 701         /* loading X.509 AA certificates */
 702         load_authcerts("AA cert", AA_CERT_PATH, AUTH_AA);
 703         /* loading X.509 OCSP certificates */
 704         load_authcerts("OCSP cert", OCSP_CERT_PATH, AUTH_OCSP);
 705         /* loading X.509 CRLs */
 706         load_crls();
 707         /* loading attribute certificates (experimental) */
 708         load_acerts();
 709
 710         daily_log_event();
 711         call_server();
 712         return -1;  /* Shouldn't ever reach this */
 713 }
 714
 715 /* leave pluto, with status.
 716  * Once child is launched, parent must not exit this way because
 717  * the lock would be released.
 718  *
 719  *  0 OK
 720  *  1 general discomfort
 721  * 10 lock file exists
 722  */
 723 void exit_pluto(int status)
 724 {
 725         reset_globals();    /* needed because we may be called in odd state */
 726         free_preshared_secrets();
 727         free_remembered_public_keys();
 728         delete_every_connection();
 729         free_crl_fetch();           /* free chain of crl fetch requests */
 730         free_ocsp_fetch();          /* free chain of ocsp fetch requests */
 731         free_authcerts();           /* free chain of X.509 authority certificates */
 732         free_crls();                /* free chain of X.509 CRLs */
 733         free_acerts();              /* free chain of X.509 attribute certificates */
 734         free_ca_infos();            /* free chain of X.509 CA information records */
 735         free_ocsp();                /* free ocsp cache */
 736         free_ifaces();
 737         scx_finalize();             /* finalize and unload PKCS #11 module */
 738         xauth_finalize();           /* finalize and unload XAUTH module */
 739         stop_adns();
 740         free_md_pool();
 741         free_crypto();
 742         free_id();                  /* free myids */
 743         free_events();              /* free remaining events */
 744         free_vendorid();                        /* free all vendor id records */
 745         delete_lock();
 746         options->destroy(options);
 747         library_deinit();
 748         close_log();
 749         exit(status);
 750 }
 751
 752 /*
 753  * Local Variables:
 754  * c-basic-offset:4
 755  * c-style: pluto
 756  * End:
 757  */