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 #define _POSIX_PTHREAD_SEMANTICS /* for two param sigwait on OpenSolaris */
  24 #include <signal.h>
  25 #undef _POSIX_PTHREAD_SEMANTICS
  26 #include <pthread.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <unistd.h>
  30 #include <time.h>
  31 #include <string.h>
  32 #include <getopt.h>
  33 #include <errno.h>
  34 #include <pwd.h>
  35 #include <grp.h>
  36 #ifdef CAPABILITIES
  37 #include <sys/capability.h>
  38 #endif /* CAPABILITIES */
  39
  40 #include "daemon.h"
  41
  42 #include <library.h>
  43 #include <utils/backtrace.h>
  44 #include <config/traffic_selector.h>
  45 #include <config/proposal.h>
  46
  47 #ifndef LOG_AUTHPRIV /* not defined on OpenSolaris */
  48 #define LOG_AUTHPRIV LOG_AUTH
  49 #endif
  50
  51 typedef struct private_daemon_t private_daemon_t;
  52
  53 /**
  54  * Private additions to daemon_t, contains threads and internal functions.
  55  */
  56 struct private_daemon_t {
  57         /**
  58          * Public members of daemon_t.
  59          */
  60         daemon_t public;
  61
  62         /**
  63          * Signal set used for signal handling.
  64          */
  65         sigset_t signal_set;
  66
  67 #ifdef CAPABILITIES
  68         /**
  69          * capabilities to keep
  70          */
  71         cap_t caps;
  72 #endif /* CAPABILITIES */
  73 };
  74
  75 /**
  76  * One and only instance of the daemon.
  77  */
  78 daemon_t *charon;
  79
  80 /**
  81  * hook in library for debugging messages
  82  */
  83 extern void (*dbg) (int level, char *fmt, ...);
  84
  85 /**
  86  * Logging hook for library logs, spreads debug message over bus
  87  */
  88 static void dbg_bus(int level, char *fmt, ...)
  89 {
  90         va_list args;
  91
  92         va_start(args, fmt);
  93         charon->bus->vlog(charon->bus, DBG_LIB, level, fmt, args);
  94         va_end(args);
  95 }
  96
  97 /**
  98  * Logging hook for library logs, using stderr output
  99  */
 100 static void dbg_stderr(int level, char *fmt, ...)
 101 {
 102         va_list args;
 103
 104         if (level <= 1)
 105         {
 106                 va_start(args, fmt);
 107                 fprintf(stderr, "00[LIB] ");
 108                 vfprintf(stderr, fmt, args);
 109                 fprintf(stderr, "\n");
 110                 va_end(args);
 111         }
 112 }
 113
 114 /**
 115  * Run the daemon and handle unix signals
 116  */
 117 static void run(private_daemon_t *this)
 118 {
 119         sigset_t set;
 120
 121         /* handle SIGINT, SIGHUP ans SIGTERM in this handler */
 122         sigemptyset(&set);
 123         sigaddset(&set, SIGINT);
 124         sigaddset(&set, SIGHUP);
 125         sigaddset(&set, SIGTERM);
 126
 127         while (TRUE)
 128         {
 129                 int sig;
 130                 int error;
 131
 132                 error = sigwait(&set, &sig);
 133                 if (error)
 134                 {
 135                         DBG1(DBG_DMN, "error %d while waiting for a signal", error);
 136                         return;
 137                 }
 138                 switch (sig)
 139                 {
 140                         case SIGHUP:
 141                         {
 142                                 DBG1(DBG_DMN, "signal of type SIGHUP received. Ignored");
 143                                 break;
 144                         }
 145                         case SIGINT:
 146                         {
 147                                 DBG1(DBG_DMN, "signal of type SIGINT received. Shutting down");
 148                                 charon->bus->alert(charon->bus, ALERT_SHUTDOWN_SIGNAL, sig);
 149                                 return;
 150                         }
 151                         case SIGTERM:
 152                         {
 153                                 DBG1(DBG_DMN, "signal of type SIGTERM received. Shutting down");
 154                                 charon->bus->alert(charon->bus, ALERT_SHUTDOWN_SIGNAL, sig);
 155                                 return;
 156                         }
 157                         default:
 158                         {
 159                                 DBG1(DBG_DMN, "unknown signal %d received. Ignored", sig);
 160                                 break;
 161                         }
 162                 }
 163         }
 164 }
 165
 166 /**
 167  * Clean up all daemon resources
 168  */
 169 static void destroy(private_daemon_t *this)
 170 {
 171         /* terminate all idle threads */
 172         if (this->public.processor)
 173         {
 174                 this->public.processor->set_threads(this->public.processor, 0);
 175         }
 176         /* close all IKE_SAs */
 177         if (this->public.ike_sa_manager)
 178         {
 179                 this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
 180         }
 181         /* unload plugins to release threads */
 182         lib->plugins->unload(lib->plugins);
 183 #ifdef CAPABILITIES
 184         cap_free(this->caps);
 185 #endif /* CAPABILITIES */
 186         DESTROY_IF(this->public.traps);
 187         DESTROY_IF(this->public.ike_sa_manager);
 188         DESTROY_IF(this->public.kernel_interface);
 189         DESTROY_IF(this->public.scheduler);
 190         DESTROY_IF(this->public.controller);
 191         DESTROY_IF(this->public.eap);
 192         DESTROY_IF(this->public.sim);
 193 #ifdef ME
 194         DESTROY_IF(this->public.connect_manager);
 195         DESTROY_IF(this->public.mediation_manager);
 196 #endif /* ME */
 197         DESTROY_IF(this->public.backends);
 198         DESTROY_IF(this->public.credentials);
 199         DESTROY_IF(this->public.sender);
 200         DESTROY_IF(this->public.receiver);
 201         DESTROY_IF(this->public.socket);
 202         /* wait until all threads are gone */
 203         DESTROY_IF(this->public.processor);
 204
 205         /* rehook library logging, shutdown logging */
 206         dbg = dbg_stderr;
 207         DESTROY_IF(this->public.bus);
 208         this->public.file_loggers->destroy_offset(this->public.file_loggers,
 209                                                                                         offsetof(file_logger_t, destroy));
 210         this->public.sys_loggers->destroy_offset(this->public.sys_loggers,
 211                                                                                         offsetof(sys_logger_t, destroy));
 212         free(this);
 213 }
 214
 215 /**
 216  * Enforce daemon shutdown, with a given reason to do so.
 217  */
 218 static void kill_daemon(private_daemon_t *this, char *reason)
 219 {
 220         /* we send SIGTERM, so the daemon can cleanly shut down */
 221         if (this->public.bus)
 222         {
 223                 DBG1(DBG_DMN, "killing daemon: %s", reason);
 224         }
 225         else
 226         {
 227                 fprintf(stderr, "killing daemon: %s\n", reason);
 228         }
 229         if (this->public.main_thread_id == pthread_self())
 230         {
 231                 /* initialization failed, terminate daemon */
 232                 unlink(PID_FILE);
 233                 exit(-1);
 234         }
 235         else
 236         {
 237                 DBG1(DBG_DMN, "sending SIGTERM to ourself");
 238                 pthread_kill(this->public.main_thread_id, SIGTERM);
 239                 /* thread must die, since he produced a ciritcal failure and can't continue */
 240                 pthread_exit(NULL);
 241         }
 242 }
 243
 244 /**
 245  * drop daemon capabilities
 246  */
 247 static void drop_capabilities(private_daemon_t *this)
 248 {
 249 #ifdef HAVE_PRCTL
 250         prctl(PR_SET_KEEPCAPS, 1);
 251 #endif
 252
 253         if (setgid(charon->gid) != 0)
 254         {
 255                 kill_daemon(this, "change to unprivileged group failed");
 256         }
 257         if (setuid(charon->uid) != 0)
 258         {
 259                 kill_daemon(this, "change to unprivileged user failed");
 260         }
 261
 262 #ifdef CAPABILITIES
 263         if (cap_set_proc(this->caps) != 0)
 264         {
 265                 kill_daemon(this, "unable to drop daemon capabilities");
 266         }
 267 #endif /* CAPABILITIES */
 268 }
 269
 270 /**
 271  * Implementation of daemon_t.keep_cap
 272  */
 273 static void keep_cap(private_daemon_t *this, u_int cap)
 274 {
 275 #ifdef CAPABILITIES
 276         cap_set_flag(this->caps, CAP_EFFECTIVE, 1, &cap, CAP_SET);
 277         cap_set_flag(this->caps, CAP_INHERITABLE, 1, &cap, CAP_SET);
 278         cap_set_flag(this->caps, CAP_PERMITTED, 1, &cap, CAP_SET);
 279 #endif /* CAPABILITIES */
 280 }
 281
 282 /**
 283  * lookup UID and GID
 284  */
 285 static void lookup_uid_gid(private_daemon_t *this)
 286 {
 287 #ifdef IPSEC_USER
 288         {
 289                 char buf[1024];
 290                 struct passwd passwd, *pwp;
 291
 292                 if (getpwnam_r(IPSEC_USER, &passwd, buf, sizeof(buf), &pwp) != 0 ||
 293                         pwp == NULL)
 294                 {
 295                         kill_daemon(this, "resolving user '"IPSEC_USER"' failed");
 296                 }
 297                 charon->uid = pwp->pw_uid;
 298         }
 299 #endif
 300 #ifdef IPSEC_GROUP
 301         {
 302                 char buf[1024];
 303                 struct group group, *grp;
 304
 305                 if (getgrnam_r(IPSEC_GROUP, &group, buf, sizeof(buf), &grp) != 0 ||
 306                         grp == NULL)
 307                 {
 308                         kill_daemon(this, "resolving group '"IPSEC_GROUP"' failed");
 309                 }
 310                 charon->gid = grp->gr_gid;
 311         }
 312 #endif
 313 }
 314
 315 /**
 316  * Log loaded plugins
 317  */
 318 static void print_plugins()
 319 {
 320         char buf[512], *plugin;
 321         int len = 0;
 322         enumerator_t *enumerator;
 323
 324         buf[0] = '\0';
 325         enumerator = lib->plugins->create_plugin_enumerator(lib->plugins);
 326         while (len < sizeof(buf) && enumerator->enumerate(enumerator, &plugin))
 327         {
 328                 len += snprintf(&buf[len], sizeof(buf)-len, "%s ", plugin);
 329         }
 330         enumerator->destroy(enumerator);
 331         DBG1(DBG_DMN, "loaded plugins: %s", buf);
 332 }
 333
 334 /**
 335  * Initialize logging
 336  */
 337 static void initialize_loggers(private_daemon_t *this, bool use_stderr,
 338                                                            level_t levels[])
 339 {
 340         sys_logger_t *sys_logger;
 341         file_logger_t *file_logger;
 342         enumerator_t *enumerator;
 343         char *facility, *filename;
 344         int loggers_defined = 0;
 345         debug_t group;
 346         level_t  def;
 347         bool append;
 348         FILE *file;
 349
 350         /* setup sysloggers */
 351         enumerator = lib->settings->create_section_enumerator(lib->settings,
 352                                                                                                                   "charon.syslog");
 353         while (enumerator->enumerate(enumerator, &facility))
 354         {
 355                 loggers_defined++;
 356                 if (streq(facility, "daemon"))
 357                 {
 358                         sys_logger = sys_logger_create(LOG_DAEMON);
 359                 }
 360                 else if (streq(facility, "auth"))
 361                 {
 362                         sys_logger = sys_logger_create(LOG_AUTHPRIV);
 363                 }
 364                 else
 365                 {
 366                         continue;
 367                 }
 368                 def = lib->settings->get_int(lib->settings,
 369                                                                          "charon.syslog.%s.default", 1, facility);
 370                 for (group = 0; group < DBG_MAX; group++)
 371                 {
 372                         sys_logger->set_level(sys_logger, group,
 373                                 lib->settings->get_int(lib->settings,
 374                                                                            "charon.syslog.%s.%N", def,
 375                                                                            facility, debug_lower_names, group));
 376                 }
 377                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 378                                                                                           sys_logger);
 379                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 380         }
 381         enumerator->destroy(enumerator);
 382
 383         /* and file loggers */
 384         enumerator = lib->settings->create_section_enumerator(lib->settings,
 385                                                                                                                   "charon.filelog");
 386         while (enumerator->enumerate(enumerator, &filename))
 387         {
 388                 loggers_defined++;
 389                 if (streq(filename, "stderr"))
 390                 {
 391                         file = stderr;
 392                 }
 393                 else if (streq(filename, "stdout"))
 394                 {
 395                         file = stdout;
 396                 }
 397                 else
 398                 {
 399                         append = lib->settings->get_bool(lib->settings,
 400                                                                         "charon.filelog.%s.append", TRUE, filename);
 401                         file = fopen(filename, append ? "a" : "w");
 402                         if (file == NULL)
 403                         {
 404                                 DBG1(DBG_DMN, "opening file %s for logging failed: %s",
 405                                          filename, strerror(errno));
 406                                 continue;
 407                         }
 408                 }
 409                 file_logger = file_logger_create(file);
 410                 def = lib->settings->get_int(lib->settings,
 411                                                                          "charon.filelog.%s.default", 1, filename);
 412                 for (group = 0; group < DBG_MAX; group++)
 413                 {
 414                         file_logger->set_level(file_logger, group,
 415                                 lib->settings->get_int(lib->settings,
 416                                                                            "charon.filelog.%s.%N", def,
 417                                                                            filename, debug_lower_names, group));
 418                 }
 419                 this->public.file_loggers->insert_last(this->public.file_loggers,
 420                                                                                            file_logger);
 421                 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
 422
 423         }
 424         enumerator->destroy(enumerator);
 425
 426         /* set up legacy style default loggers provided via command-line */
 427         if (!loggers_defined)
 428         {
 429                 /* set up default stdout file_logger */
 430                 file_logger = file_logger_create(stdout);
 431                 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
 432                 this->public.file_loggers->insert_last(this->public.file_loggers,
 433                                                                                            file_logger);
 434                 /* set up default daemon sys_logger */
 435                 sys_logger = sys_logger_create(LOG_DAEMON);
 436                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 437                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 438                                                                                           sys_logger);
 439                 for (group = 0; group < DBG_MAX; group++)
 440                 {
 441                         sys_logger->set_level(sys_logger, group, levels[group]);
 442                         if (use_stderr)
 443                         {
 444                                 file_logger->set_level(file_logger, group, levels[group]);
 445                         }
 446                 }
 447
 448                 /* set up default auth sys_logger */
 449                 sys_logger = sys_logger_create(LOG_AUTHPRIV);
 450                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 451                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 452                                                                                           sys_logger);
 453                 sys_logger->set_level(sys_logger, DBG_ANY, LEVEL_AUDIT);
 454         }
 455 }
 456
 457 /**
 458  * Initialize the daemon
 459  */
 460 static bool initialize(private_daemon_t *this, bool syslog, level_t levels[])
 461 {
 462         /* for uncritical pseudo random numbers */
 463         srandom(time(NULL) + getpid());
 464
 465         /* setup bus and it's listeners first to enable log output */
 466         this->public.bus = bus_create();
 467         /* set up hook to log dbg message in library via charons message bus */
 468         dbg = dbg_bus;
 469
 470         initialize_loggers(this, !syslog, levels);
 471
 472         DBG1(DBG_DMN, "Starting IKEv2 charon daemon (strongSwan "VERSION")");
 473
 474         if (lib->integrity)
 475         {
 476                 DBG1(DBG_DMN, "integrity tests enabled:");
 477                 DBG1(DBG_DMN, "lib    'libstrongswan': passed file and segment integrity tests");
 478                 DBG1(DBG_DMN, "daemon 'charon': passed file integrity test");
 479         }
 480
 481         /* load secrets, ca certificates and crls */
 482         this->public.processor = processor_create();
 483         this->public.scheduler = scheduler_create();
 484         this->public.credentials = credential_manager_create();
 485         this->public.controller = controller_create();
 486         this->public.eap = eap_manager_create();
 487         this->public.sim = sim_manager_create();
 488         this->public.backends = backend_manager_create();
 489         this->public.kernel_interface = kernel_interface_create();
 490         this->public.socket = socket_create();
 491         this->public.traps = trap_manager_create();
 492
 493         /* load plugins, further infrastructure may need it */
 494         if (!lib->plugins->load(lib->plugins, NULL,
 495                         lib->settings->get_str(lib->settings, "charon.load", PLUGINS)))
 496         {
 497                 return FALSE;
 498         }
 499
 500         print_plugins();
 501
 502         this->public.ike_sa_manager = ike_sa_manager_create();
 503         if (this->public.ike_sa_manager == NULL)
 504         {
 505                 return FALSE;
 506         }
 507         this->public.sender = sender_create();
 508         this->public.receiver = receiver_create();
 509         if (this->public.receiver == NULL)
 510         {
 511                 return FALSE;
 512         }
 513
 514 #ifdef ME
 515         this->public.connect_manager = connect_manager_create();
 516         if (this->public.connect_manager == NULL)
 517         {
 518                 return FALSE;
 519         }
 520         this->public.mediation_manager = mediation_manager_create();
 521 #endif /* ME */
 522
 523         return TRUE;
 524 }
 525
 526 /**
 527  * Handle SIGSEGV/SIGILL signals raised by threads
 528  */
 529 static void segv_handler(int signal)
 530 {
 531         backtrace_t *backtrace;
 532
 533         DBG1(DBG_DMN, "thread %u received %d", pthread_self(), signal);
 534         backtrace = backtrace_create(2);
 535         backtrace->log(backtrace, stderr);
 536         backtrace->destroy(backtrace);
 537
 538         DBG1(DBG_DMN, "killing ourself, received critical signal");
 539         abort();
 540 }
 541
 542 /**
 543  * Create the daemon.
 544  */
 545 private_daemon_t *daemon_create(void)
 546 {
 547         struct sigaction action;
 548         private_daemon_t *this = malloc_thing(private_daemon_t);
 549
 550         /* assign methods */
 551         this->public.kill = (void (*) (daemon_t*,char*))kill_daemon;
 552         this->public.keep_cap = (void(*)(daemon_t*, u_int cap))keep_cap;
 553
 554         /* NULL members for clean destruction */
 555         this->public.socket = NULL;
 556         this->public.ike_sa_manager = NULL;
 557         this->public.traps = NULL;
 558         this->public.credentials = NULL;
 559         this->public.backends = NULL;
 560         this->public.sender= NULL;
 561         this->public.receiver = NULL;
 562         this->public.scheduler = NULL;
 563         this->public.kernel_interface = NULL;
 564         this->public.processor = NULL;
 565         this->public.controller = NULL;
 566         this->public.eap = NULL;
 567         this->public.sim = NULL;
 568         this->public.bus = NULL;
 569         this->public.file_loggers = linked_list_create();
 570         this->public.sys_loggers = linked_list_create();
 571 #ifdef ME
 572         this->public.connect_manager = NULL;
 573         this->public.mediation_manager = NULL;
 574 #endif /* ME */
 575         this->public.uid = 0;
 576         this->public.gid = 0;
 577
 578         this->public.main_thread_id = pthread_self();
 579 #ifdef CAPABILITIES
 580         this->caps = cap_init();
 581         keep_cap(this, CAP_NET_ADMIN);
 582         if (lib->leak_detective)
 583         {
 584                 keep_cap(this, CAP_SYS_NICE);
 585         }
 586 #endif /* CAPABILITIES */
 587
 588         /* add handler for SEGV and ILL,
 589          * add handler for USR1 (cancellation).
 590          * INT, TERM and HUP are handled by sigwait() in run() */
 591         action.sa_handler = segv_handler;
 592         action.sa_flags = 0;
 593         sigemptyset(&action.sa_mask);
 594         sigaddset(&action.sa_mask, SIGINT);
 595         sigaddset(&action.sa_mask, SIGTERM);
 596         sigaddset(&action.sa_mask, SIGHUP);
 597         sigaction(SIGSEGV, &action, NULL);
 598         sigaction(SIGILL, &action, NULL);
 599         sigaction(SIGBUS, &action, NULL);
 600         action.sa_handler = SIG_IGN;
 601         sigaction(SIGPIPE, &action, NULL);
 602
 603         pthread_sigmask(SIG_SETMASK, &action.sa_mask, 0);
 604
 605         return this;
 606 }
 607
 608 /**
 609  * Check/create PID file, return TRUE if already running
 610  */
 611 static bool check_pidfile()
 612 {
 613         struct stat stb;
 614         FILE *file;
 615
 616         if (stat(PID_FILE, &stb) == 0)
 617         {
 618                 file = fopen(PID_FILE, "r");
 619                 if (file)
 620                 {
 621                         char buf[64];
 622                         pid_t pid = 0;
 623
 624                         memset(buf, 0, sizeof(buf));
 625                         if (fread(buf, 1, sizeof(buf), file))
 626                         {
 627                                 pid = atoi(buf);
 628                         }
 629                         fclose(file);
 630                         if (pid && kill(pid, 0) == 0)
 631                         {       /* such a process is running */
 632                                 return TRUE;
 633                         }
 634                 }
 635                 DBG1(DBG_DMN, "removing pidfile '"PID_FILE"', process not running");
 636                 unlink(PID_FILE);
 637         }
 638
 639         /* create new pidfile */
 640         file = fopen(PID_FILE, "w");
 641         if (file)
 642         {
 643                 fprintf(file, "%d\n", getpid());
 644                 ignore_result(fchown(fileno(file), charon->uid, charon->gid));
 645                 fclose(file);
 646         }
 647         return FALSE;
 648 }
 649
 650 /**
 651  * print command line usage and exit
 652  */
 653 static void usage(const char *msg)
 654 {
 655         if (msg != NULL && *msg != '\0')
 656         {
 657                 fprintf(stderr, "%s\n", msg);
 658         }
 659         fprintf(stderr, "Usage: charon\n"
 660                                         "         [--help]\n"
 661                                         "         [--version]\n"
 662                                         "         [--use-syslog]\n"
 663                                         "         [--debug-<type> <level>]\n"
 664                                         "           <type>:  log context type (dmn|mgr|ike|chd|job|cfg|knl|net|enc|lib)\n"
 665                                         "           <level>: log verbosity (-1 = silent, 0 = audit, 1 = control,\n"
 666                                         "                                    2 = controlmore, 3 = raw, 4 = private)\n"
 667                                         "\n"
 668                    );
 669         exit(msg == NULL? 0 : 1);
 670 }
 671
 672 /**
 673  * Main function, manages the daemon.
 674  */
 675 int main(int argc, char *argv[])
 676 {
 677         bool use_syslog = FALSE;
 678         private_daemon_t *private_charon;
 679         level_t levels[DBG_MAX];
 680         int group;
 681
 682         /* logging for library during initialization, as we have no bus yet */
 683         dbg = dbg_stderr;
 684
 685         /* initialize library */
 686         if (!library_init(NULL))
 687         {
 688                 library_deinit();
 689                 exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
 690         }
 691
 692         if (lib->integrity &&
 693                 !lib->integrity->check_file(lib->integrity, "charon", argv[0]))
 694         {
 695                 dbg_stderr(1, "integrity check of charon failed");
 696                 library_deinit();
 697                 exit(SS_RC_DAEMON_INTEGRITY);
 698         }
 699
 700         lib->printf_hook->add_handler(lib->printf_hook, 'R',
 701                                                                   traffic_selector_printf_hook,
 702                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 703                                                                   PRINTF_HOOK_ARGTYPE_END);
 704         lib->printf_hook->add_handler(lib->printf_hook, 'P',
 705                                                                   proposal_printf_hook,
 706                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 707                                                                   PRINTF_HOOK_ARGTYPE_END);
 708         private_charon = daemon_create();
 709         charon = (daemon_t*)private_charon;
 710
 711         lookup_uid_gid(private_charon);
 712
 713         /* use CTRL loglevel for default */
 714         for (group = 0; group < DBG_MAX; group++)
 715         {
 716                 levels[group] = LEVEL_CTRL;
 717         }
 718
 719         /* handle arguments */
 720         for (;;)
 721         {
 722                 struct option long_opts[] = {
 723                         { "help", no_argument, NULL, 'h' },
 724                         { "version", no_argument, NULL, 'v' },
 725                         { "use-syslog", no_argument, NULL, 'l' },
 726                         /* TODO: handle "debug-all" */
 727                         { "debug-dmn", required_argument, &group, DBG_DMN },
 728                         { "debug-mgr", required_argument, &group, DBG_MGR },
 729                         { "debug-ike", required_argument, &group, DBG_IKE },
 730                         { "debug-chd", required_argument, &group, DBG_CHD },
 731                         { "debug-job", required_argument, &group, DBG_JOB },
 732                         { "debug-cfg", required_argument, &group, DBG_CFG },
 733                         { "debug-knl", required_argument, &group, DBG_KNL },
 734                         { "debug-net", required_argument, &group, DBG_NET },
 735                         { "debug-enc", required_argument, &group, DBG_ENC },
 736                         { "debug-lib", required_argument, &group, DBG_LIB },
 737                         { 0,0,0,0 }
 738                 };
 739
 740                 int c = getopt_long(argc, argv, "", long_opts, NULL);
 741                 switch (c)
 742                 {
 743                         case EOF:
 744                                 break;
 745                         case 'h':
 746                                 usage(NULL);
 747                                 break;
 748                         case 'v':
 749                                 printf("Linux strongSwan %s\n", VERSION);
 750                                 exit(0);
 751                         case 'l':
 752                                 use_syslog = TRUE;
 753                                 continue;
 754                         case 0:
 755                                 /* option is in group */
 756                                 levels[group] = atoi(optarg);
 757                                 continue;
 758                         default:
 759                                 usage("");
 760                                 break;
 761                 }
 762                 break;
 763         }
 764
 765         /* initialize daemon */
 766         if (!initialize(private_charon, use_syslog, levels))
 767         {
 768                 DBG1(DBG_DMN, "initialization failed - aborting charon");
 769                 destroy(private_charon);
 770                 library_deinit();
 771                 exit(SS_RC_INITIALIZATION_FAILED);
 772         }
 773
 774         if (check_pidfile())
 775         {
 776                 DBG1(DBG_DMN, "charon already running (\""PID_FILE"\" exists)");
 777                 destroy(private_charon);
 778                 library_deinit();
 779                 exit(-1);
 780         }
 781
 782         /* drop the capabilities we won't need */
 783         drop_capabilities(private_charon);
 784
 785         /* start the engine, go multithreaded */
 786         charon->processor->set_threads(charon->processor,
 787                                                 lib->settings->get_int(lib->settings, "charon.threads",
 788                                                                                            DEFAULT_THREADS));
 789
 790         /* run daemon */
 791         run(private_charon);
 792
 793         /* normal termination, cleanup and exit */
 794         destroy(private_charon);
 795         unlink(PID_FILE);
 796
 797         library_deinit();
 798
 799         return 0;
 800 }
 801