src/charon/daemon.c

   1 /*
   2  * Copyright (C) 2006-2009 Tobias Brunner
   3  * Copyright (C) 2005-2009 Martin Willi
   4  * Copyright (C) 2006 Daniel Roethlisberger
   5  * Copyright (C) 2005 Jan Hutter
   6  * Hochschule fuer Technik Rapperswil
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * for more details.
  17  */
  18
  19 #include <stdio.h>
  20 #ifdef HAVE_PRCTL
  21 #include <sys/prctl.h>
  22 #endif
  23 #include <signal.h>
  24 #include <pthread.h>
  25 #include <sys/stat.h>
  26 #include <sys/types.h>
  27 #include <unistd.h>
  28 #include <time.h>
  29 #include <string.h>
  30 #include <getopt.h>
  31 #include <errno.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34 #ifdef CAPABILITIES
  35 #include <sys/capability.h>
  36 #endif /* CAPABILITIES */
  37
  38 #include "daemon.h"
  39
  40 #include <library.h>
  41 #include <utils/backtrace.h>
  42 #include <config/traffic_selector.h>
  43 #include <config/proposal.h>
  44
  45 #ifdef INTEGRITY_TEST
  46 #include <fips/fips.h>
  47 #include <fips/fips_signature.h>
  48 #endif /* INTEGRITY_TEST */
  49
  50 typedef struct private_daemon_t private_daemon_t;
  51
  52 /**
  53  * Private additions to daemon_t, contains threads and internal functions.
  54  */
  55 struct private_daemon_t {
  56         /**
  57          * Public members of daemon_t.
  58          */
  59         daemon_t public;
  60
  61         /**
  62          * Signal set used for signal handling.
  63          */
  64         sigset_t signal_set;
  65
  66 #ifdef CAPABILITIES
  67         /**
  68          * capabilities to keep
  69          */
  70         cap_t caps;
  71 #endif /* CAPABILITIES */
  72 };
  73
  74 /**
  75  * One and only instance of the daemon.
  76  */
  77 daemon_t *charon;
  78
  79 /**
  80  * hook in library for debugging messages
  81  */
  82 extern void (*dbg) (int level, char *fmt, ...);
  83
  84 /**
  85  * Logging hook for library logs, spreads debug message over bus
  86  */
  87 static void dbg_bus(int level, char *fmt, ...)
  88 {
  89         va_list args;
  90
  91         va_start(args, fmt);
  92         charon->bus->vlog(charon->bus, DBG_LIB, level, fmt, args);
  93         va_end(args);
  94 }
  95
  96 /**
  97  * Logging hook for library logs, using stderr output
  98  */
  99 static void dbg_stderr(int level, char *fmt, ...)
 100 {
 101         va_list args;
 102
 103         if (level <= 1)
 104         {
 105                 va_start(args, fmt);
 106                 fprintf(stderr, "00[LIB] ");
 107                 vfprintf(stderr, fmt, args);
 108                 fprintf(stderr, "\n");
 109                 va_end(args);
 110         }
 111 }
 112
 113 /**
 114  * Run the daemon and handle unix signals
 115  */
 116 static void run(private_daemon_t *this)
 117 {
 118         sigset_t set;
 119
 120         /* handle SIGINT, SIGHUP ans SIGTERM in this handler */
 121         sigemptyset(&set);
 122         sigaddset(&set, SIGINT);
 123         sigaddset(&set, SIGHUP);
 124         sigaddset(&set, SIGTERM);
 125
 126         while (TRUE)
 127         {
 128                 int sig;
 129                 int error;
 130
 131                 error = sigwait(&set, &sig);
 132                 if (error)
 133                 {
 134                         DBG1(DBG_DMN, "error %d while waiting for a signal", error);
 135                         return;
 136                 }
 137                 switch (sig)
 138                 {
 139                         case SIGHUP:
 140                         {
 141                                 DBG1(DBG_DMN, "signal of type SIGHUP received. Ignored");
 142                                 break;
 143                         }
 144                         case SIGINT:
 145                         {
 146                                 DBG1(DBG_DMN, "signal of type SIGINT received. Shutting down");
 147                                 return;
 148                         }
 149                         case SIGTERM:
 150                         {
 151                                 DBG1(DBG_DMN, "signal of type SIGTERM received. Shutting down");
 152                                 return;
 153                         }
 154                         default:
 155                         {
 156                                 DBG1(DBG_DMN, "unknown signal %d received. Ignored", sig);
 157                                 break;
 158                         }
 159                 }
 160         }
 161 }
 162
 163 /**
 164  * Clean up all daemon resources
 165  */
 166 static void destroy(private_daemon_t *this)
 167 {
 168         /* terminate all idle threads */
 169         if (this->public.processor)
 170         {
 171                 this->public.processor->set_threads(this->public.processor, 0);
 172         }
 173         /* close all IKE_SAs */
 174         if (this->public.ike_sa_manager)
 175         {
 176                 this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
 177         }
 178         /* unload plugins to release threads */
 179         lib->plugins->unload(lib->plugins);
 180 #ifdef CAPABILITIES
 181         cap_free(this->caps);
 182 #endif /* CAPABILITIES */
 183         DESTROY_IF(this->public.traps);
 184         DESTROY_IF(this->public.ike_sa_manager);
 185         DESTROY_IF(this->public.kernel_interface);
 186         DESTROY_IF(this->public.scheduler);
 187         DESTROY_IF(this->public.controller);
 188         DESTROY_IF(this->public.eap);
 189         DESTROY_IF(this->public.sim);
 190 #ifdef ME
 191         DESTROY_IF(this->public.connect_manager);
 192         DESTROY_IF(this->public.mediation_manager);
 193 #endif /* ME */
 194         DESTROY_IF(this->public.backends);
 195         DESTROY_IF(this->public.attributes);
 196         DESTROY_IF(this->public.credentials);
 197         DESTROY_IF(this->public.sender);
 198         DESTROY_IF(this->public.receiver);
 199         DESTROY_IF(this->public.socket);
 200         /* wait until all threads are gone */
 201         DESTROY_IF(this->public.processor);
 202
 203         /* rehook library logging, shutdown logging */
 204         dbg = dbg_stderr;
 205         DESTROY_IF(this->public.bus);
 206         this->public.file_loggers->destroy_offset(this->public.file_loggers,
 207                                                                                         offsetof(file_logger_t, destroy));
 208         this->public.sys_loggers->destroy_offset(this->public.sys_loggers,
 209                                                                                         offsetof(sys_logger_t, destroy));
 210         free(this);
 211 }
 212
 213 /**
 214  * Enforce daemon shutdown, with a given reason to do so.
 215  */
 216 static void kill_daemon(private_daemon_t *this, char *reason)
 217 {
 218         /* we send SIGTERM, so the daemon can cleanly shut down */
 219         if (this->public.bus)
 220         {
 221                 DBG1(DBG_DMN, "killing daemon: %s", reason);
 222         }
 223         else
 224         {
 225                 fprintf(stderr, "killing daemon: %s\n", reason);
 226         }
 227         if (this->public.main_thread_id == pthread_self())
 228         {
 229                 /* initialization failed, terminate daemon */
 230                 unlink(PID_FILE);
 231                 exit(-1);
 232         }
 233         else
 234         {
 235                 DBG1(DBG_DMN, "sending SIGTERM to ourself");
 236                 pthread_kill(this->public.main_thread_id, SIGTERM);
 237                 /* thread must die, since he produced a ciritcal failure and can't continue */
 238                 pthread_exit(NULL);
 239         }
 240 }
 241
 242 /**
 243  * drop daemon capabilities
 244  */
 245 static void drop_capabilities(private_daemon_t *this)
 246 {
 247 #ifdef HAVE_PRCTL
 248         prctl(PR_SET_KEEPCAPS, 1);
 249 #endif
 250
 251         if (setgid(charon->gid) != 0)
 252         {
 253                 kill_daemon(this, "change to unprivileged group failed");
 254         }
 255         if (setuid(charon->uid) != 0)
 256         {
 257                 kill_daemon(this, "change to unprivileged user failed");
 258         }
 259
 260 #ifdef CAPABILITIES
 261         if (cap_set_proc(this->caps) != 0)
 262         {
 263                 kill_daemon(this, "unable to drop daemon capabilities");
 264         }
 265 #endif /* CAPABILITIES */
 266 }
 267
 268 /**
 269  * Implementation of daemon_t.keep_cap
 270  */
 271 static void keep_cap(private_daemon_t *this, u_int cap)
 272 {
 273 #ifdef CAPABILITIES
 274         cap_set_flag(this->caps, CAP_EFFECTIVE, 1, &cap, CAP_SET);
 275         cap_set_flag(this->caps, CAP_INHERITABLE, 1, &cap, CAP_SET);
 276         cap_set_flag(this->caps, CAP_PERMITTED, 1, &cap, CAP_SET);
 277 #endif /* CAPABILITIES */
 278 }
 279
 280 /**
 281  * lookup UID and GID
 282  */
 283 static void lookup_uid_gid(private_daemon_t *this)
 284 {
 285 #ifdef IPSEC_USER
 286         {
 287                 char buf[1024];
 288                 struct passwd passwd, *pwp;
 289
 290                 if (getpwnam_r(IPSEC_USER, &passwd, buf, sizeof(buf), &pwp) != 0 ||
 291                         pwp == NULL)
 292                 {
 293                         kill_daemon(this, "resolving user '"IPSEC_USER"' failed");
 294                 }
 295                 charon->uid = pwp->pw_uid;
 296         }
 297 #endif
 298 #ifdef IPSEC_GROUP
 299         {
 300                 char buf[1024];
 301                 struct group group, *grp;
 302
 303                 if (getgrnam_r(IPSEC_GROUP, &group, buf, sizeof(buf), &grp) != 0 ||
 304                         grp == NULL)
 305                 {
 306                         kill_daemon(this, "resolving group '"IPSEC_GROUP"' failed");
 307                 }
 308                 charon->gid = grp->gr_gid;
 309         }
 310 #endif
 311 }
 312
 313 /**
 314  * Log loaded plugins
 315  */
 316 static void print_plugins()
 317 {
 318         char buf[512], *plugin;
 319         int len = 0;
 320         enumerator_t *enumerator;
 321
 322         buf[0] = '\0';
 323         enumerator = lib->plugins->create_plugin_enumerator(lib->plugins);
 324         while (len < sizeof(buf) && enumerator->enumerate(enumerator, &plugin))
 325         {
 326                 len += snprintf(&buf[len], sizeof(buf)-len, "%s ", plugin);
 327         }
 328         enumerator->destroy(enumerator);
 329         DBG1(DBG_DMN, "loaded plugins: %s", buf);
 330 }
 331
 332 /**
 333  * Initialize logging
 334  */
 335 static void initialize_loggers(private_daemon_t *this, bool use_stderr,
 336                                                            level_t levels[])
 337 {
 338         sys_logger_t *sys_logger;
 339         file_logger_t *file_logger;
 340         enumerator_t *enumerator;
 341         char *facility, *filename;
 342         int loggers_defined = 0;
 343         debug_t group;
 344         level_t  def;
 345         bool append;
 346         FILE *file;
 347
 348         /* setup sysloggers */
 349         enumerator = lib->settings->create_section_enumerator(lib->settings,
 350                                                                                                                   "charon.syslog");
 351         while (enumerator->enumerate(enumerator, &facility))
 352         {
 353                 loggers_defined++;
 354                 if (streq(facility, "daemon"))
 355                 {
 356                         sys_logger = sys_logger_create(LOG_DAEMON);
 357                 }
 358                 else if (streq(facility, "auth"))
 359                 {
 360                         sys_logger = sys_logger_create(LOG_AUTHPRIV);
 361                 }
 362                 else
 363                 {
 364                         continue;
 365                 }
 366                 def = lib->settings->get_int(lib->settings,
 367                                                                          "charon.syslog.%s.default", 1, facility);
 368                 for (group = 0; group < DBG_MAX; group++)
 369                 {
 370                         sys_logger->set_level(sys_logger, group,
 371                                 lib->settings->get_int(lib->settings,
 372                                                                            "charon.syslog.%s.%N", def,
 373                                                                            facility, debug_lower_names, group));
 374                 }
 375                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 376                                                                                           sys_logger);
 377                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 378         }
 379         enumerator->destroy(enumerator);
 380
 381         /* and file loggers */
 382         enumerator = lib->settings->create_section_enumerator(lib->settings,
 383                                                                                                                   "charon.filelog");
 384         while (enumerator->enumerate(enumerator, &filename))
 385         {
 386                 loggers_defined++;
 387                 if (streq(filename, "stderr"))
 388                 {
 389                         file = stderr;
 390                 }
 391                 else if (streq(filename, "stdout"))
 392                 {
 393                         file = stdout;
 394                 }
 395                 else
 396                 {
 397                         append = lib->settings->get_bool(lib->settings,
 398                                                                         "charon.filelog.%s.append", TRUE, filename);
 399                         file = fopen(filename, append ? "a" : "w");
 400                         if (file == NULL)
 401                         {
 402                                 DBG1(DBG_DMN, "opening file %s for logging failed: %s",
 403                                          filename, strerror(errno));
 404                                 continue;
 405                         }
 406                 }
 407                 file_logger = file_logger_create(file);
 408                 def = lib->settings->get_int(lib->settings,
 409                                                                          "charon.filelog.%s.default", 1, filename);
 410                 for (group = 0; group < DBG_MAX; group++)
 411                 {
 412                         file_logger->set_level(file_logger, group,
 413                                 lib->settings->get_int(lib->settings,
 414                                                                            "charon.filelog.%s.%N", def,
 415                                                                            filename, debug_lower_names, group));
 416                 }
 417                 this->public.file_loggers->insert_last(this->public.file_loggers,
 418                                                                                            file_logger);
 419                 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
 420
 421         }
 422         enumerator->destroy(enumerator);
 423
 424         /* set up legacy style default loggers provided via command-line */
 425         if (!loggers_defined)
 426         {
 427                 /* set up default stdout file_logger */
 428                 file_logger = file_logger_create(stdout);
 429                 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
 430                 this->public.file_loggers->insert_last(this->public.file_loggers,
 431                                                                                            file_logger);
 432                 /* set up default daemon sys_logger */
 433                 sys_logger = sys_logger_create(LOG_DAEMON);
 434                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 435                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 436                                                                                           sys_logger);
 437                 for (group = 0; group < DBG_MAX; group++)
 438                 {
 439                         sys_logger->set_level(sys_logger, group, levels[group]);
 440                         if (use_stderr)
 441                         {
 442                                 file_logger->set_level(file_logger, group, levels[group]);
 443                         }
 444                 }
 445
 446                 /* set up default auth sys_logger */
 447                 sys_logger = sys_logger_create(LOG_AUTHPRIV);
 448                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 449                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 450                                                                                           sys_logger);
 451                 sys_logger->set_level(sys_logger, DBG_ANY, LEVEL_AUDIT);
 452         }
 453 }
 454
 455 /**
 456  * Initialize the daemon
 457  */
 458 static bool initialize(private_daemon_t *this, bool syslog, level_t levels[])
 459 {
 460         /* for uncritical pseudo random numbers */
 461         srandom(time(NULL) + getpid());
 462
 463         /* setup bus and it's listeners first to enable log output */
 464         this->public.bus = bus_create();
 465         /* set up hook to log dbg message in library via charons message bus */
 466         dbg = dbg_bus;
 467
 468         initialize_loggers(this, !syslog, levels);
 469
 470         DBG1(DBG_DMN, "starting charon (strongSwan Version %s)", VERSION);
 471
 472         /* load secrets, ca certificates and crls */
 473         this->public.processor = processor_create();
 474         this->public.scheduler = scheduler_create();
 475         this->public.credentials = credential_manager_create();
 476         this->public.controller = controller_create();
 477         this->public.eap = eap_manager_create();
 478         this->public.sim = sim_manager_create();
 479         this->public.backends = backend_manager_create();
 480         this->public.attributes = attribute_manager_create();
 481         this->public.kernel_interface = kernel_interface_create();
 482         this->public.socket = socket_create();
 483
 484         /* load plugins, further infrastructure may need it */
 485         lib->plugins->load(lib->plugins, IPSEC_PLUGINDIR,
 486                 lib->settings->get_str(lib->settings, "charon.load", PLUGINS));
 487
 488         print_plugins();
 489
 490         /* create the kernel interfaces */
 491         this->public.kernel_interface->create_interfaces(this->public.kernel_interface);
 492
 493 #ifdef INTEGRITY_TEST
 494         DBG1(DBG_DMN, "integrity test of libstrongswan code");
 495         if (fips_verify_hmac_signature(hmac_key, hmac_signature))
 496         {
 497                 DBG1(DBG_DMN, "  integrity test passed");
 498         }
 499         else
 500         {
 501                 DBG1(DBG_DMN, "  integrity test failed");
 502                 return FALSE;
 503         }
 504 #endif /* INTEGRITY_TEST */
 505
 506         this->public.ike_sa_manager = ike_sa_manager_create();
 507         if (this->public.ike_sa_manager == NULL)
 508         {
 509                 return FALSE;
 510         }
 511         this->public.traps = trap_manager_create();
 512         this->public.sender = sender_create();
 513         this->public.receiver = receiver_create();
 514         if (this->public.receiver == NULL)
 515         {
 516                 return FALSE;
 517         }
 518
 519 #ifdef ME
 520         this->public.connect_manager = connect_manager_create();
 521         if (this->public.connect_manager == NULL)
 522         {
 523                 return FALSE;
 524         }
 525         this->public.mediation_manager = mediation_manager_create();
 526 #endif /* ME */
 527
 528         return TRUE;
 529 }
 530
 531 /**
 532  * Handle SIGSEGV/SIGILL signals raised by threads
 533  */
 534 static void segv_handler(int signal)
 535 {
 536         backtrace_t *backtrace;
 537
 538         DBG1(DBG_DMN, "thread %u received %d", pthread_self(), signal);
 539         backtrace = backtrace_create(2);
 540         backtrace->log(backtrace, stderr);
 541         backtrace->destroy(backtrace);
 542
 543         DBG1(DBG_DMN, "killing ourself, received critical signal");
 544         raise(SIGKILL);
 545 }
 546
 547 /**
 548  * Create the daemon.
 549  */
 550 private_daemon_t *daemon_create(void)
 551 {
 552         struct sigaction action;
 553         private_daemon_t *this = malloc_thing(private_daemon_t);
 554
 555         /* assign methods */
 556         this->public.kill = (void (*) (daemon_t*,char*))kill_daemon;
 557         this->public.keep_cap = (void(*)(daemon_t*, u_int cap))keep_cap;
 558
 559         /* NULL members for clean destruction */
 560         this->public.socket = NULL;
 561         this->public.ike_sa_manager = NULL;
 562         this->public.traps = NULL;
 563         this->public.credentials = NULL;
 564         this->public.backends = NULL;
 565         this->public.attributes = NULL;
 566         this->public.sender= NULL;
 567         this->public.receiver = NULL;
 568         this->public.scheduler = NULL;
 569         this->public.kernel_interface = NULL;
 570         this->public.processor = NULL;
 571         this->public.controller = NULL;
 572         this->public.eap = NULL;
 573         this->public.sim = NULL;
 574         this->public.bus = NULL;
 575         this->public.file_loggers = linked_list_create();
 576         this->public.sys_loggers = linked_list_create();
 577 #ifdef ME
 578         this->public.connect_manager = NULL;
 579         this->public.mediation_manager = NULL;
 580 #endif /* ME */
 581         this->public.uid = 0;
 582         this->public.gid = 0;
 583
 584         this->public.main_thread_id = pthread_self();
 585 #ifdef CAPABILITIES
 586         this->caps = cap_init();
 587         keep_cap(this, CAP_NET_ADMIN);
 588         if (lib->leak_detective)
 589         {
 590                 keep_cap(this, CAP_SYS_NICE);
 591         }
 592 #endif /* CAPABILITIES */
 593
 594         /* add handler for SEGV and ILL,
 595          * add handler for USR1 (cancellation).
 596          * INT, TERM and HUP are handled by sigwait() in run() */
 597         action.sa_handler = segv_handler;
 598         action.sa_flags = 0;
 599         sigemptyset(&action.sa_mask);
 600         sigaddset(&action.sa_mask, SIGINT);
 601         sigaddset(&action.sa_mask, SIGTERM);
 602         sigaddset(&action.sa_mask, SIGHUP);
 603         sigaction(SIGSEGV, &action, NULL);
 604         sigaction(SIGILL, &action, NULL);
 605         sigaction(SIGBUS, &action, NULL);
 606         action.sa_handler = SIG_IGN;
 607         sigaction(SIGPIPE, &action, NULL);
 608
 609         pthread_sigmask(SIG_SETMASK, &action.sa_mask, 0);
 610
 611         return this;
 612 }
 613
 614 /**
 615  * Check/create PID file, return TRUE if already running
 616  */
 617 static bool check_pidfile()
 618 {
 619         struct stat stb;
 620         FILE *file;
 621
 622         if (stat(PID_FILE, &stb) == 0)
 623         {
 624                 file = fopen(PID_FILE, "r");
 625                 if (file)
 626                 {
 627                         char buf[64];
 628                         pid_t pid = 0;
 629
 630                         memset(buf, 0, sizeof(buf));
 631                         if (fread(buf, 1, sizeof(buf), file))
 632                         {
 633                                 pid = atoi(buf);
 634                         }
 635                         fclose(file);
 636                         if (pid && kill(pid, 0) == 0)
 637                         {       /* such a process is running */
 638                                 return TRUE;
 639                         }
 640                 }
 641                 DBG1(DBG_DMN, "removing pidfile '"PID_FILE"', process not running");
 642                 unlink(PID_FILE);
 643         }
 644
 645         /* create new pidfile */
 646         file = fopen(PID_FILE, "w");
 647         if (file)
 648         {
 649                 fprintf(file, "%d\n", getpid());
 650                 ignore_result(fchown(fileno(file), charon->uid, charon->gid));
 651                 fclose(file);
 652         }
 653         return FALSE;
 654 }
 655
 656 /**
 657  * print command line usage and exit
 658  */
 659 static void usage(const char *msg)
 660 {
 661         if (msg != NULL && *msg != '\0')
 662         {
 663                 fprintf(stderr, "%s\n", msg);
 664         }
 665         fprintf(stderr, "Usage: charon\n"
 666                                         "         [--help]\n"
 667                                         "         [--version]\n"
 668                                         "         [--use-syslog]\n"
 669                                         "         [--debug-<type> <level>]\n"
 670                                         "           <type>:  log context type (dmn|mgr|ike|chd|job|cfg|knl|net|enc|lib)\n"
 671                                         "           <level>: log verbosity (-1 = silent, 0 = audit, 1 = control,\n"
 672                                         "                                    2 = controlmore, 3 = raw, 4 = private)\n"
 673                                         "\n"
 674                    );
 675         exit(msg == NULL? 0 : 1);
 676 }
 677
 678 /**
 679  * Main function, manages the daemon.
 680  */
 681 int main(int argc, char *argv[])
 682 {
 683         bool use_syslog = FALSE;
 684         private_daemon_t *private_charon;
 685         level_t levels[DBG_MAX];
 686         int group;
 687
 688         /* logging for library during initialization, as we have no bus yet */
 689         dbg = dbg_stderr;
 690
 691         /* initialize library */
 692         library_init(STRONGSWAN_CONF);
 693         lib->printf_hook->add_handler(lib->printf_hook, 'R',
 694                                                                   traffic_selector_printf_hook,
 695                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 696                                                                   PRINTF_HOOK_ARGTYPE_END);
 697         lib->printf_hook->add_handler(lib->printf_hook, 'P',
 698                                                                   proposal_printf_hook,
 699                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 700                                                                   PRINTF_HOOK_ARGTYPE_END);
 701         private_charon = daemon_create();
 702         charon = (daemon_t*)private_charon;
 703
 704         lookup_uid_gid(private_charon);
 705
 706         /* use CTRL loglevel for default */
 707         for (group = 0; group < DBG_MAX; group++)
 708         {
 709                 levels[group] = LEVEL_CTRL;
 710         }
 711
 712         /* handle arguments */
 713         for (;;)
 714         {
 715                 struct option long_opts[] = {
 716                         { "help", no_argument, NULL, 'h' },
 717                         { "version", no_argument, NULL, 'v' },
 718                         { "use-syslog", no_argument, NULL, 'l' },
 719                         /* TODO: handle "debug-all" */
 720                         { "debug-dmn", required_argument, &group, DBG_DMN },
 721                         { "debug-mgr", required_argument, &group, DBG_MGR },
 722                         { "debug-ike", required_argument, &group, DBG_IKE },
 723                         { "debug-chd", required_argument, &group, DBG_CHD },
 724                         { "debug-job", required_argument, &group, DBG_JOB },
 725                         { "debug-cfg", required_argument, &group, DBG_CFG },
 726                         { "debug-knl", required_argument, &group, DBG_KNL },
 727                         { "debug-net", required_argument, &group, DBG_NET },
 728                         { "debug-enc", required_argument, &group, DBG_ENC },
 729                         { "debug-lib", required_argument, &group, DBG_LIB },
 730                         { 0,0,0,0 }
 731                 };
 732
 733                 int c = getopt_long(argc, argv, "", long_opts, NULL);
 734                 switch (c)
 735                 {
 736                         case EOF:
 737                         break;
 738                         case 'h':
 739                                 usage(NULL);
 740                                 break;
 741                         case 'v':
 742                                 printf("Linux strongSwan %s\n", VERSION);
 743                                 exit(0);
 744                         case 'l':
 745                                 use_syslog = TRUE;
 746                                 continue;
 747                         case 0:
 748                                 /* option is in group */
 749                                 levels[group] = atoi(optarg);
 750                                 continue;
 751                         default:
 752                                 usage("");
 753                                 break;
 754                 }
 755                 break;
 756         }
 757
 758         /* initialize daemon */
 759         if (!initialize(private_charon, use_syslog, levels))
 760         {
 761                 DBG1(DBG_DMN, "initialization failed - aborting charon");
 762                 destroy(private_charon);
 763                 exit(-1);
 764         }
 765
 766         if (check_pidfile())
 767         {
 768                 DBG1(DBG_DMN, "charon already running (\""PID_FILE"\" exists)");
 769                 destroy(private_charon);
 770                 exit(-1);
 771         }
 772
 773         /* drop the capabilities we won't need */
 774         drop_capabilities(private_charon);
 775
 776         /* start the engine, go multithreaded */
 777         charon->processor->set_threads(charon->processor,
 778                                                 lib->settings->get_int(lib->settings, "charon.threads",
 779                                                                                            DEFAULT_THREADS));
 780
 781         /* run daemon */
 782         run(private_charon);
 783
 784         /* normal termination, cleanup and exit */
 785         destroy(private_charon);
 786         unlink(PID_FILE);
 787
 788         library_deinit();
 789
 790         return 0;
 791 }
 792