implementation of strictcrlpolicy=ifuri
[strongswan.git] / src / charon / daemon.c
1 /**
2 * @file daemon.c
3 *
4 * @brief Implementation of daemon_t and main of IKEv2-Daemon.
5 *
6 */
7
8 /*
9 * Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
10 * Copyright (C) 2005-2006 Martin Willi
11 * Copyright (C) 2005 Jan Hutter
12 * Hochschule fuer Technik Rapperswil
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
18 *
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
21 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * for more details.
23 */
24
25 #include <stdio.h>
26 #include <signal.h>
27 #include <pthread.h>
28 #include <sys/stat.h>
29 #include <sys/types.h>
30 #include <unistd.h>
31 #include <time.h>
32 #include <string.h>
33 #include <getopt.h>
34 #include <errno.h>
35 #ifdef HAVE_BACKTRACE
36 # include <execinfo.h>
37 #endif /* HAVE_BACKTRACE */
38
39 #include "daemon.h"
40
41 #include <library.h>
42 #include <crypto/ca.h>
43 #include <utils/fetcher.h>
44 #include <config/credentials/local_credential_store.h>
45 #include <config/backends/local_backend.h>
46 #include <sa/authenticators/eap/eap_method.h>
47
48
49 typedef struct private_daemon_t private_daemon_t;
50
51 /**
52 * Private additions to daemon_t, contains threads and internal functions.
53 */
54 struct private_daemon_t {
55 /**
56 * Public members of daemon_t.
57 */
58 daemon_t public;
59
60 /**
61 * Signal set used for signal handling.
62 */
63 sigset_t signal_set;
64
65 /**
66 * The thread_id of main-thread.
67 */
68 pthread_t main_thread_id;
69 };
70
71 /**
72 * One and only instance of the daemon.
73 */
74 daemon_t *charon;
75
76 /**
77 * hook in library for debugging messages
78 */
79 extern void (*dbg) (int level, char *fmt, ...);
80
81 /**
82 * Logging hook for library logs, spreads debug message over bus
83 */
84 static void dbg_bus(int level, char *fmt, ...)
85 {
86 va_list args;
87
88 va_start(args, fmt);
89 charon->bus->vsignal(charon->bus, DBG_LIB, level, fmt, args);
90 va_end(args);
91 }
92
93 /**
94 * Logging hook for library logs, using stderr output
95 */
96 static void dbg_stderr(int level, char *fmt, ...)
97 {
98 va_list args;
99
100 va_start(args, fmt);
101 fprintf(stderr, "00[LIB] ");
102 vfprintf(stderr, fmt, args);
103 fprintf(stderr, "\n");
104 va_end(args);
105 }
106
107 /**
108 * Run the daemon and handle unix signals
109 */
110 static void run(private_daemon_t *this)
111 {
112 /* reselect signals for this thread */
113 sigemptyset(&(this->signal_set));
114 sigaddset(&(this->signal_set), SIGINT);
115 sigaddset(&(this->signal_set), SIGHUP);
116 sigaddset(&(this->signal_set), SIGTERM);
117 pthread_sigmask(SIG_BLOCK, &(this->signal_set), 0);
118
119 while(TRUE)
120 {
121 int signal_number;
122 int error;
123
124 error = sigwait(&(this->signal_set), &signal_number);
125 if(error)
126 {
127 DBG1(DBG_DMN, "error %d while waiting for a signal", error);
128 return;
129 }
130 switch (signal_number)
131 {
132 case SIGHUP:
133 {
134 DBG1(DBG_DMN, "signal of type SIGHUP received. Ignored");
135 break;
136 }
137 case SIGINT:
138 {
139 DBG1(DBG_DMN, "signal of type SIGINT received. Shutting down");
140 return;
141 }
142 case SIGTERM:
143 DBG1(DBG_DMN, "signal of type SIGTERM received. Shutting down");
144 return;
145 default:
146 {
147 DBG1(DBG_DMN, "unknown signal %d received. Ignored", signal_number);
148 break;
149 }
150 }
151 }
152 }
153
154 /**
155 * Clean up all daemon resources
156 */
157 static void destroy(private_daemon_t *this)
158 {
159 /* destruction is a non trivial task, we need to follow
160 * a strict order to prevent threading issues!
161 * Kill active threads first, except the sender, as
162 * the killed IKE_SA want to send delete messages.
163 */
164 /* we don't want to receive anything anymore... */
165 DESTROY_IF(this->public.receiver);
166 /* ignore all incoming user requests */
167 DESTROY_IF(this->public.stroke);
168 DESTROY_IF(this->public.controller);
169 /* stop scheduing jobs */
170 DESTROY_IF(this->public.scheduler);
171 /* stop processing jobs */
172 DESTROY_IF(this->public.thread_pool);
173 /* shut down manager with all IKE SAs */
174 DESTROY_IF(this->public.ike_sa_manager);
175 /* all child SAs should be down now, so kill kernel interface */
176 DESTROY_IF(this->public.kernel_interface);
177 /* destroy other infrastructure */
178 DESTROY_IF(this->public.job_queue);
179 DESTROY_IF(this->public.event_queue);
180 DESTROY_IF(this->public.credentials);
181 DESTROY_IF(this->public.cfg_store);
182 DESTROY_IF(this->public.local_backend);
183 sched_yield();
184 /* we hope the sender could send the outstanding deletes, but
185 * we shut down here at any cost */
186 DESTROY_IF(this->public.sender);
187 DESTROY_IF(this->public.socket);
188 /* before destroying bus with its listeners, rehook library logs */
189 dbg = dbg_stderr;
190 DESTROY_IF(this->public.bus);
191 DESTROY_IF(this->public.outlog);
192 DESTROY_IF(this->public.syslog);
193 DESTROY_IF(this->public.authlog);
194 free(this);
195 }
196
197 /**
198 * Enforce daemon shutdown, with a given reason to do so.
199 */
200 static void kill_daemon(private_daemon_t *this, char *reason)
201 {
202 /* we send SIGTERM, so the daemon can cleanly shut down */
203 DBG1(DBG_DMN, "killing daemon: %s", reason);
204 if (this->main_thread_id == pthread_self())
205 {
206 /* initialization failed, terminate daemon */
207 destroy(this);
208 unlink(PID_FILE);
209 exit(-1);
210 }
211 else
212 {
213 DBG1(DBG_DMN, "sending SIGTERM to ourself");
214 raise(SIGTERM);
215 /* thread must die, since he produced a ciritcal failure and can't continue */
216 pthread_exit(NULL);
217 }
218 }
219
220 /**
221 * Initialize the daemon, optional with a strict crl policy
222 */
223 static void initialize(private_daemon_t *this, bool syslog, level_t levels[])
224 {
225 credential_store_t* credentials;
226 signal_t signal;
227
228 /* for uncritical pseudo random numbers */
229 srandom(time(NULL) + getpid());
230
231 /* setup bus and it's listeners first to enable log output */
232 this->public.bus = bus_create();
233 this->public.outlog = file_logger_create(stdout);
234 this->public.syslog = sys_logger_create(LOG_DAEMON);
235 this->public.authlog = sys_logger_create(LOG_AUTHPRIV);
236 this->public.bus->add_listener(this->public.bus, &this->public.syslog->listener);
237 this->public.bus->add_listener(this->public.bus, &this->public.outlog->listener);
238 this->public.bus->add_listener(this->public.bus, &this->public.authlog->listener);
239 this->public.authlog->set_level(this->public.authlog, SIG_ANY, LEVEL_AUDIT);
240 /* set up hook to log dbg message in library via charons message bus */
241 dbg = dbg_bus;
242
243 /* apply loglevels */
244 for (signal = 0; signal < DBG_MAX; signal++)
245 {
246 if (syslog)
247 {
248 this->public.syslog->set_level(this->public.syslog,
249 signal, levels[signal]);
250 }
251 else
252 {
253 this->public.outlog->set_level(this->public.outlog,
254 signal, levels[signal]);
255 }
256 }
257
258 DBG1(DBG_DMN, "starting charon (strongSwan Version %s)", VERSION);
259
260 this->public.socket = socket_create(IKEV2_UDP_PORT, IKEV2_NATT_PORT);
261 this->public.ike_sa_manager = ike_sa_manager_create();
262 this->public.job_queue = job_queue_create();
263 this->public.event_queue = event_queue_create();
264 this->public.credentials = (credential_store_t*)local_credential_store_create();
265 this->public.cfg_store = cfg_store_create();
266 this->public.local_backend = local_backend_create();
267 this->public.cfg_store->register_backend(this->public.cfg_store,
268 &this->public.local_backend->backend);
269
270 /* initialize fetcher_t class */
271 fetcher_initialize();
272
273 /* load secrets, ca certificates and crls */
274 credentials = this->public.credentials;
275 credentials->load_ca_certificates(credentials);
276 credentials->load_aa_certificates(credentials);
277 credentials->load_attr_certificates(credentials);
278 credentials->load_ocsp_certificates(credentials);
279 credentials->load_crls(credentials);
280 credentials->load_secrets(credentials);
281
282 /* start building threads, we are multi-threaded NOW */
283 this->public.controller = controller_create();
284 this->public.stroke = stroke_create(this->public.local_backend);
285 this->public.sender = sender_create();
286 this->public.receiver = receiver_create();
287 this->public.scheduler = scheduler_create();
288 this->public.kernel_interface = kernel_interface_create();
289 this->public.thread_pool = thread_pool_create(NUMBER_OF_WORKING_THREADS);
290 }
291
292 /**
293 * Handle SIGSEGV/SIGILL signals raised by threads
294 */
295 void signal_handler(int signal)
296 {
297 #ifdef HAVE_BACKTRACE
298 void *array[20];
299 size_t size;
300 char **strings;
301 size_t i;
302
303 size = backtrace(array, 20);
304 strings = backtrace_symbols(array, size);
305
306 DBG1(DBG_DMN, "thread %u received %s. Dumping %d frames from stack:",
307 pthread_self(), signal == SIGSEGV ? "SIGSEGV" : "SIGILL", size);
308
309 for (i = 0; i < size; i++)
310 {
311 DBG1(DBG_DMN, " %s", strings[i]);
312 }
313 free (strings);
314 #else /* !HAVE_BACKTRACE */
315 DBG1(DBG_DMN, "thread %u received %s",
316 pthread_self(), signal == SIGSEGV ? "SIGSEGV" : "SIGILL");
317 #endif /* HAVE_BACKTRACE */
318 DBG1(DBG_DMN, "killing ourself hard after SIGSEGV");
319 raise(SIGKILL);
320 }
321
322 /**
323 * Create the daemon.
324 */
325 private_daemon_t *daemon_create(void)
326 {
327 private_daemon_t *this = malloc_thing(private_daemon_t);
328 struct sigaction action;
329
330 /* assign methods */
331 this->public.kill = (void (*) (daemon_t*,char*))kill_daemon;
332
333 /* NULL members for clean destruction */
334 this->public.socket = NULL;
335 this->public.ike_sa_manager = NULL;
336 this->public.job_queue = NULL;
337 this->public.event_queue = NULL;
338 this->public.credentials = NULL;
339 this->public.cfg_store = NULL;
340 this->public.local_backend = NULL;
341 this->public.sender= NULL;
342 this->public.receiver = NULL;
343 this->public.scheduler = NULL;
344 this->public.kernel_interface = NULL;
345 this->public.thread_pool = NULL;
346 this->public.controller = NULL;
347 this->public.stroke = NULL;
348 this->public.bus = NULL;
349 this->public.outlog = NULL;
350 this->public.syslog = NULL;
351 this->public.authlog = NULL;
352
353 this->main_thread_id = pthread_self();
354
355 /* setup signal handling for all threads */
356 sigemptyset(&(this->signal_set));
357 sigaddset(&(this->signal_set), SIGSEGV);
358 sigaddset(&(this->signal_set), SIGINT);
359 sigaddset(&(this->signal_set), SIGHUP);
360 sigaddset(&(this->signal_set), SIGTERM);
361 pthread_sigmask(SIG_BLOCK, &(this->signal_set), 0);
362
363 /* setup SIGSEGV handler for all threads */
364 action.sa_handler = signal_handler;
365 action.sa_mask = this->signal_set;
366 action.sa_flags = 0;
367 sigaction(SIGSEGV, &action, NULL);
368 sigaction(SIGILL, &action, NULL);
369 return this;
370 }
371
372 /**
373 * print command line usage and exit
374 */
375 static void usage(const char *msg)
376 {
377 if (msg != NULL && *msg != '\0')
378 {
379 fprintf(stderr, "%s\n", msg);
380 }
381 fprintf(stderr, "Usage: charon\n"
382 " [--help]\n"
383 " [--version]\n"
384 " [--strictcrlpolicy]\n"
385 " [--cachecrls]\n"
386 " [--crlcheckinterval <interval>]\n"
387 " [--eapdir <dir>]\n"
388 " [--use-syslog]\n"
389 " [--debug-<type> <level>]\n"
390 " <type>: log context type (dmn|mgr|ike|chd|job|cfg|knl|net|enc|lib)\n"
391 " <level>: log verbosity (-1 = silent, 0 = audit, 1 = control,\n"
392 " 2 = controlmore, 3 = raw, 4 = private)\n"
393 "\n"
394 );
395 exit(msg == NULL? 0 : 1);
396 }
397
398 /**
399 * Main function, manages the daemon.
400 */
401 int main(int argc, char *argv[])
402 {
403 u_int crl_check_interval = 0;
404 strict_t strict_crl_policy = STRICT_NO;
405 bool cache_crls = FALSE;
406 bool use_syslog = FALSE;
407 char *eapdir = IPSEC_EAPDIR;
408
409 private_daemon_t *private_charon;
410 FILE *pid_file;
411 struct stat stb;
412 linked_list_t *list;
413 host_t *host;
414 level_t levels[DBG_MAX];
415 int signal;
416
417 /* use CTRL loglevel for default */
418 for (signal = 0; signal < DBG_MAX; signal++)
419 {
420 levels[signal] = LEVEL_CTRL;
421 }
422
423 /* handle arguments */
424 for (;;)
425 {
426 struct option long_opts[] = {
427 { "help", no_argument, NULL, 'h' },
428 { "version", no_argument, NULL, 'v' },
429 { "use-syslog", no_argument, NULL, 'l' },
430 { "strictcrlpolicy", required_argument, NULL, 'r' },
431 { "cachecrls", no_argument, NULL, 'C' },
432 { "crlcheckinterval", required_argument, NULL, 'x' },
433 { "eapdir", required_argument, NULL, 'e' },
434 /* TODO: handle "debug-all" */
435 { "debug-dmn", required_argument, &signal, DBG_DMN },
436 { "debug-mgr", required_argument, &signal, DBG_MGR },
437 { "debug-ike", required_argument, &signal, DBG_IKE },
438 { "debug-chd", required_argument, &signal, DBG_CHD },
439 { "debug-job", required_argument, &signal, DBG_JOB },
440 { "debug-cfg", required_argument, &signal, DBG_CFG },
441 { "debug-knl", required_argument, &signal, DBG_KNL },
442 { "debug-net", required_argument, &signal, DBG_NET },
443 { "debug-enc", required_argument, &signal, DBG_ENC },
444 { "debug-lib", required_argument, &signal, DBG_LIB },
445 { 0,0,0,0 }
446 };
447
448 int c = getopt_long(argc, argv, "", long_opts, NULL);
449 switch (c)
450 {
451 case EOF:
452 break;
453 case 'h':
454 usage(NULL);
455 break;
456 case 'v':
457 printf("Linux strongSwan %s\n", VERSION);
458 exit(0);
459 case 'l':
460 use_syslog = TRUE;
461 continue;
462 case 'r':
463 strict_crl_policy = atoi(optarg);
464 continue;
465 case 'C':
466 cache_crls = TRUE;
467 continue;
468 case 'x':
469 crl_check_interval = atoi(optarg);
470 continue;
471 case 'e':
472 eapdir = optarg;
473 continue;
474 case 0:
475 /* option is in signal */
476 levels[signal] = atoi(optarg);
477 continue;
478 default:
479 usage("");
480 break;
481 }
482 break;
483 }
484
485 private_charon = daemon_create();
486 charon = (daemon_t*)private_charon;
487
488 /* initialize daemon */
489 initialize(private_charon, use_syslog, levels);
490
491 /* load pluggable EAP modules */
492 eap_method_load(eapdir);
493
494 /* set strict_crl_policy, cache_crls and crl_check_interval options */
495 ca_info_set_options(strict_crl_policy, cache_crls, crl_check_interval);
496
497 /* check/setup PID file */
498 if (stat(PID_FILE, &stb) == 0)
499 {
500 DBG1(DBG_DMN, "charon already running (\""PID_FILE"\" exists)");
501 destroy(private_charon);
502 exit(-1);
503 }
504 pid_file = fopen(PID_FILE, "w");
505 if (pid_file)
506 {
507 fprintf(pid_file, "%d\n", getpid());
508 fclose(pid_file);
509 }
510
511 /* log socket info */
512 list = charon->kernel_interface->create_address_list(charon->kernel_interface);
513 DBG1(DBG_NET, "listening on %d addresses:", list->get_count(list));
514 while (list->remove_first(list, (void**)&host) == SUCCESS)
515 {
516 DBG1(DBG_NET, " %H", host);
517 host->destroy(host);
518 }
519 list->destroy(list);
520
521 /* run daemon */
522 run(private_charon);
523
524 eap_method_unload();
525 fetcher_finalize();
526 /* normal termination, cleanup and exit */
527 destroy(private_charon);
528 unlink(PID_FILE);
529
530 return 0;
531 }