src/libcharon/daemon.c

   1 /*
   2  * Copyright (C) 2006-2010 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 #include <sys/types.h>
  21 #include <unistd.h>
  22 #include <time.h>
  23 #include <errno.h>
  24 #ifdef CAPABILITIES
  25 #include <sys/capability.h>
  26 #endif /* CAPABILITIES */
  27
  28 #include "daemon.h"
  29
  30 #include <library.h>
  31 #include <selectors/traffic_selector.h>
  32 #include <config/proposal.h>
  33
  34 #ifndef LOG_AUTHPRIV /* not defined on OpenSolaris */
  35 #define LOG_AUTHPRIV LOG_AUTH
  36 #endif
  37
  38 typedef struct private_daemon_t private_daemon_t;
  39
  40 /**
  41  * Private additions to daemon_t, contains threads and internal functions.
  42  */
  43 struct private_daemon_t {
  44         /**
  45          * Public members of daemon_t.
  46          */
  47         daemon_t public;
  48
  49 #ifdef CAPABILITIES
  50         /**
  51          * capabilities to keep
  52          */
  53         cap_t caps;
  54 #endif /* CAPABILITIES */
  55 };
  56
  57 /**
  58  * One and only instance of the daemon.
  59  */
  60 daemon_t *charon;
  61
  62 /**
  63  * hook in library for debugging messages
  64  */
  65 extern void (*dbg) (int level, char *fmt, ...);
  66
  67 /**
  68  * we store the previous debug function so we can reset it
  69  */
  70 static void (*dbg_old) (int level, char *fmt, ...);
  71
  72 /**
  73  * Logging hook for library logs, spreads debug message over bus
  74  */
  75 static void dbg_bus(int level, char *fmt, ...)
  76 {
  77         va_list args;
  78
  79         va_start(args, fmt);
  80         charon->bus->vlog(charon->bus, DBG_LIB, level, fmt, args);
  81         va_end(args);
  82 }
  83
  84 /**
  85  * Clean up all daemon resources
  86  */
  87 static void destroy(private_daemon_t *this)
  88 {
  89         /* terminate all idle threads */
  90         if (this->public.processor)
  91         {
  92                 this->public.processor->set_threads(this->public.processor, 0);
  93         }
  94         /* close all IKE_SAs */
  95         if (this->public.ike_sa_manager)
  96         {
  97                 this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
  98         }
  99         DESTROY_IF(this->public.receiver);
 100         /* unload plugins to release threads */
 101         lib->plugins->unload(lib->plugins);
 102 #ifdef CAPABILITIES
 103         cap_free(this->caps);
 104 #endif /* CAPABILITIES */
 105         DESTROY_IF(this->public.traps);
 106         DESTROY_IF(this->public.ike_sa_manager);
 107         DESTROY_IF(this->public.kernel_interface);
 108         DESTROY_IF(this->public.scheduler);
 109         DESTROY_IF(this->public.controller);
 110         DESTROY_IF(this->public.eap);
 111         DESTROY_IF(this->public.sim);
 112 #ifdef ME
 113         DESTROY_IF(this->public.connect_manager);
 114         DESTROY_IF(this->public.mediation_manager);
 115 #endif /* ME */
 116         DESTROY_IF(this->public.backends);
 117         DESTROY_IF(this->public.credentials);
 118         DESTROY_IF(this->public.sender);
 119         DESTROY_IF(this->public.socket);
 120         /* wait until all threads are gone */
 121         DESTROY_IF(this->public.processor);
 122
 123         /* rehook library logging, shutdown logging */
 124         dbg = dbg_old;
 125         DESTROY_IF(this->public.bus);
 126         this->public.file_loggers->destroy_offset(this->public.file_loggers,
 127                                                                                         offsetof(file_logger_t, destroy));
 128         this->public.sys_loggers->destroy_offset(this->public.sys_loggers,
 129                                                                                         offsetof(sys_logger_t, destroy));
 130         free(this);
 131 }
 132
 133 METHOD(daemon_t, keep_cap, void,
 134            private_daemon_t *this, u_int cap)
 135 {
 136 #ifdef CAPABILITIES
 137         cap_set_flag(this->caps, CAP_EFFECTIVE, 1, &cap, CAP_SET);
 138         cap_set_flag(this->caps, CAP_INHERITABLE, 1, &cap, CAP_SET);
 139         cap_set_flag(this->caps, CAP_PERMITTED, 1, &cap, CAP_SET);
 140 #endif /* CAPABILITIES */
 141 }
 142
 143 METHOD(daemon_t, drop_capabilities, bool,
 144            private_daemon_t *this)
 145 {
 146 #ifdef CAPABILITIES
 147         if (cap_set_proc(this->caps) != 0)
 148         {
 149                 return FALSE;
 150         }
 151 #endif /* CAPABILITIES */
 152         return TRUE;
 153 }
 154
 155 METHOD(daemon_t, start, void,
 156            private_daemon_t *this)
 157 {
 158         /* start the engine, go multithreaded */
 159         charon->processor->set_threads(charon->processor,
 160                                                 lib->settings->get_int(lib->settings, "charon.threads",
 161                                                                                            DEFAULT_THREADS));
 162 }
 163
 164 /**
 165  * Log loaded plugins
 166  */
 167 static void print_plugins()
 168 {
 169         char buf[512], *plugin;
 170         int len = 0;
 171         enumerator_t *enumerator;
 172
 173         buf[0] = '\0';
 174         enumerator = lib->plugins->create_plugin_enumerator(lib->plugins);
 175         while (len < sizeof(buf) && enumerator->enumerate(enumerator, &plugin))
 176         {
 177                 len += snprintf(&buf[len], sizeof(buf)-len, "%s ", plugin);
 178         }
 179         enumerator->destroy(enumerator);
 180         DBG1(DBG_DMN, "loaded plugins: %s", buf);
 181 }
 182
 183 /**
 184  * Initialize logging
 185  */
 186 static void initialize_loggers(private_daemon_t *this, bool use_stderr,
 187                                                            level_t levels[])
 188 {
 189         sys_logger_t *sys_logger;
 190         file_logger_t *file_logger;
 191         enumerator_t *enumerator;
 192         char *facility, *filename;
 193         int loggers_defined = 0;
 194         debug_t group;
 195         level_t  def;
 196         bool append;
 197         FILE *file;
 198
 199         /* setup sysloggers */
 200         enumerator = lib->settings->create_section_enumerator(lib->settings,
 201                                                                                                                   "charon.syslog");
 202         while (enumerator->enumerate(enumerator, &facility))
 203         {
 204                 loggers_defined++;
 205                 if (streq(facility, "daemon"))
 206                 {
 207                         sys_logger = sys_logger_create(LOG_DAEMON);
 208                 }
 209                 else if (streq(facility, "auth"))
 210                 {
 211                         sys_logger = sys_logger_create(LOG_AUTHPRIV);
 212                 }
 213                 else
 214                 {
 215                         continue;
 216                 }
 217                 def = lib->settings->get_int(lib->settings,
 218                                                                          "charon.syslog.%s.default", 1, facility);
 219                 for (group = 0; group < DBG_MAX; group++)
 220                 {
 221                         sys_logger->set_level(sys_logger, group,
 222                                 lib->settings->get_int(lib->settings,
 223                                                                            "charon.syslog.%s.%N", def,
 224                                                                            facility, debug_lower_names, group));
 225                 }
 226                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 227                                                                                           sys_logger);
 228                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 229         }
 230         enumerator->destroy(enumerator);
 231
 232         /* and file loggers */
 233         enumerator = lib->settings->create_section_enumerator(lib->settings,
 234                                                                                                                   "charon.filelog");
 235         while (enumerator->enumerate(enumerator, &filename))
 236         {
 237                 loggers_defined++;
 238                 if (streq(filename, "stderr"))
 239                 {
 240                         file = stderr;
 241                 }
 242                 else if (streq(filename, "stdout"))
 243                 {
 244                         file = stdout;
 245                 }
 246                 else
 247                 {
 248                         append = lib->settings->get_bool(lib->settings,
 249                                                                         "charon.filelog.%s.append", TRUE, filename);
 250                         file = fopen(filename, append ? "a" : "w");
 251                         if (file == NULL)
 252                         {
 253                                 DBG1(DBG_DMN, "opening file %s for logging failed: %s",
 254                                          filename, strerror(errno));
 255                                 continue;
 256                         }
 257                 }
 258                 file_logger = file_logger_create(file);
 259                 def = lib->settings->get_int(lib->settings,
 260                                                                          "charon.filelog.%s.default", 1, filename);
 261                 for (group = 0; group < DBG_MAX; group++)
 262                 {
 263                         file_logger->set_level(file_logger, group,
 264                                 lib->settings->get_int(lib->settings,
 265                                                                            "charon.filelog.%s.%N", def,
 266                                                                            filename, debug_lower_names, group));
 267                 }
 268                 this->public.file_loggers->insert_last(this->public.file_loggers,
 269                                                                                            file_logger);
 270                 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
 271
 272         }
 273         enumerator->destroy(enumerator);
 274
 275         /* set up legacy style default loggers provided via command-line */
 276         if (!loggers_defined)
 277         {
 278                 /* set up default stdout file_logger */
 279                 file_logger = file_logger_create(stdout);
 280                 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
 281                 this->public.file_loggers->insert_last(this->public.file_loggers,
 282                                                                                            file_logger);
 283                 /* set up default daemon sys_logger */
 284                 sys_logger = sys_logger_create(LOG_DAEMON);
 285                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 286                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 287                                                                                           sys_logger);
 288                 for (group = 0; group < DBG_MAX; group++)
 289                 {
 290                         sys_logger->set_level(sys_logger, group, levels[group]);
 291                         if (use_stderr)
 292                         {
 293                                 file_logger->set_level(file_logger, group, levels[group]);
 294                         }
 295                 }
 296
 297                 /* set up default auth sys_logger */
 298                 sys_logger = sys_logger_create(LOG_AUTHPRIV);
 299                 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
 300                 this->public.sys_loggers->insert_last(this->public.sys_loggers,
 301                                                                                           sys_logger);
 302                 sys_logger->set_level(sys_logger, DBG_ANY, LEVEL_AUDIT);
 303         }
 304 }
 305
 306 METHOD(daemon_t, initialize, bool,
 307            private_daemon_t *this, bool syslog, level_t levels[])
 308 {
 309         /* for uncritical pseudo random numbers */
 310         srandom(time(NULL) + getpid());
 311
 312         /* setup bus and it's listeners first to enable log output */
 313         this->public.bus = bus_create();
 314         /* set up hook to log dbg message in library via charons message bus */
 315         dbg_old = dbg;
 316         dbg = dbg_bus;
 317
 318         initialize_loggers(this, !syslog, levels);
 319
 320         DBG1(DBG_DMN, "Starting IKEv2 charon daemon (strongSwan "VERSION")");
 321
 322         if (lib->integrity)
 323         {
 324                 DBG1(DBG_DMN, "integrity tests enabled:");
 325                 DBG1(DBG_DMN, "lib    'libstrongswan': passed file and segment integrity tests");
 326                 DBG1(DBG_DMN, "lib    'libcharon': passed file and segment integrity tests");
 327                 DBG1(DBG_DMN, "daemon 'charon': passed file integrity test");
 328         }
 329
 330         /* load secrets, ca certificates and crls */
 331         this->public.processor = processor_create();
 332         this->public.scheduler = scheduler_create();
 333         this->public.credentials = credential_manager_create();
 334         this->public.controller = controller_create();
 335         this->public.eap = eap_manager_create();
 336         this->public.sim = sim_manager_create();
 337         this->public.backends = backend_manager_create();
 338         this->public.kernel_interface = kernel_interface_create();
 339         this->public.socket = socket_manager_create();
 340         this->public.traps = trap_manager_create();
 341
 342         /* load plugins, further infrastructure may need it */
 343         if (!lib->plugins->load(lib->plugins, NULL,
 344                         lib->settings->get_str(lib->settings, "charon.load", PLUGINS)))
 345         {
 346                 return FALSE;
 347         }
 348
 349         print_plugins();
 350
 351         this->public.ike_sa_manager = ike_sa_manager_create();
 352         if (this->public.ike_sa_manager == NULL)
 353         {
 354                 return FALSE;
 355         }
 356         this->public.sender = sender_create();
 357         this->public.receiver = receiver_create();
 358         if (this->public.receiver == NULL)
 359         {
 360                 return FALSE;
 361         }
 362
 363 #ifdef ME
 364         this->public.connect_manager = connect_manager_create();
 365         if (this->public.connect_manager == NULL)
 366         {
 367                 return FALSE;
 368         }
 369         this->public.mediation_manager = mediation_manager_create();
 370 #endif /* ME */
 371
 372         return TRUE;
 373 }
 374
 375 /**
 376  * Create the daemon.
 377  */
 378 private_daemon_t *daemon_create()
 379 {
 380         private_daemon_t *this;
 381
 382         INIT(this,
 383                 .public = {
 384                         .keep_cap = _keep_cap,
 385                         .drop_capabilities = _drop_capabilities,
 386                         .initialize = _initialize,
 387                         .start = _start,
 388                         .file_loggers = linked_list_create(),
 389                         .sys_loggers = linked_list_create(),
 390                 },
 391         );
 392
 393 #ifdef CAPABILITIES
 394         this->caps = cap_init();
 395         keep_cap(this, CAP_NET_ADMIN);
 396         if (lib->leak_detective)
 397         {
 398                 keep_cap(this, CAP_SYS_NICE);
 399         }
 400 #endif /* CAPABILITIES */
 401
 402         return this;
 403 }
 404
 405 /**
 406  * Described in header.
 407  */
 408 void libcharon_deinit()
 409 {
 410
 411         destroy((private_daemon_t*)charon);
 412         charon = NULL;
 413 }
 414
 415 /**
 416  * Described in header.
 417  */
 418 bool libcharon_init()
 419 {
 420         private_daemon_t *this;
 421
 422         this = daemon_create();
 423         charon = &this->public;
 424
 425         lib->printf_hook->add_handler(lib->printf_hook, 'R',
 426                                                                   traffic_selector_printf_hook,
 427                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 428                                                                   PRINTF_HOOK_ARGTYPE_END);
 429         lib->printf_hook->add_handler(lib->printf_hook, 'P',
 430                                                                   proposal_printf_hook,
 431                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 432                                                                   PRINTF_HOOK_ARGTYPE_END);
 433
 434         if (lib->integrity &&
 435                 !lib->integrity->check(lib->integrity, "libcharon", libcharon_init))
 436         {
 437                 dbg(1, "integrity check of libcharon failed");
 438                 return FALSE;
 439         }
 440
 441         return TRUE;
 442 }