Move processor_t (thread-pool) to libhydra.
[strongswan.git] / 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 <syslog.h>
23 #include <time.h>
24 #include <errno.h>
25
26 #ifdef CAPABILITIES
27 #ifdef HAVE_SYS_CAPABILITY_H
28 #include <sys/capability.h>
29 #endif /* HAVE_SYS_CAPABILITY_H */
30 #endif /* CAPABILITIES */
31
32 #include "daemon.h"
33
34 #include <library.h>
35 #include <config/proposal.h>
36
37 #ifndef LOG_AUTHPRIV /* not defined on OpenSolaris */
38 #define LOG_AUTHPRIV LOG_AUTH
39 #endif
40
41 typedef struct private_daemon_t private_daemon_t;
42
43 /**
44 * Private additions to daemon_t, contains threads and internal functions.
45 */
46 struct private_daemon_t {
47 /**
48 * Public members of daemon_t.
49 */
50 daemon_t public;
51
52 /**
53 * capabilities to keep
54 */
55 #ifdef CAPABILITIES_LIBCAP
56 cap_t caps;
57 #endif /* CAPABILITIES_LIBCAP */
58 #ifdef CAPABILITIES_NATIVE
59 struct __user_cap_data_struct caps;
60 #endif /* CAPABILITIES_NATIVE */
61
62 };
63
64 /**
65 * One and only instance of the daemon.
66 */
67 daemon_t *charon;
68
69 /**
70 * hook in library for debugging messages
71 */
72 extern void (*dbg) (debug_t group, level_t level, char *fmt, ...);
73
74 /**
75 * we store the previous debug function so we can reset it
76 */
77 static void (*dbg_old) (debug_t group, level_t level, char *fmt, ...);
78
79 /**
80 * Logging hook for library logs, spreads debug message over bus
81 */
82 static void dbg_bus(debug_t group, level_t level, char *fmt, ...)
83 {
84 va_list args;
85
86 va_start(args, fmt);
87 charon->bus->vlog(charon->bus, group, level, fmt, args);
88 va_end(args);
89 }
90
91 /**
92 * Clean up all daemon resources
93 */
94 static void destroy(private_daemon_t *this)
95 {
96 /* terminate all idle threads */
97 hydra->processor->set_threads(hydra->processor, 0);
98
99 /* close all IKE_SAs */
100 if (this->public.ike_sa_manager)
101 {
102 this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
103 }
104 DESTROY_IF(this->public.receiver);
105 DESTROY_IF(this->public.sender);
106 /* unload plugins to release threads */
107 lib->plugins->unload(lib->plugins);
108 #ifdef CAPABILITIES_LIBCAP
109 cap_free(this->caps);
110 #endif /* CAPABILITIES_LIBCAP */
111 DESTROY_IF(this->public.traps);
112 DESTROY_IF(this->public.ike_sa_manager);
113 DESTROY_IF(this->public.kernel_interface);
114 DESTROY_IF(this->public.scheduler);
115 DESTROY_IF(this->public.controller);
116 DESTROY_IF(this->public.eap);
117 DESTROY_IF(this->public.sim);
118 #ifdef ME
119 DESTROY_IF(this->public.connect_manager);
120 DESTROY_IF(this->public.mediation_manager);
121 #endif /* ME */
122 DESTROY_IF(this->public.backends);
123 DESTROY_IF(this->public.socket);
124
125 /* rehook library logging, shutdown logging */
126 dbg = dbg_old;
127 DESTROY_IF(this->public.bus);
128 this->public.file_loggers->destroy_offset(this->public.file_loggers,
129 offsetof(file_logger_t, destroy));
130 this->public.sys_loggers->destroy_offset(this->public.sys_loggers,
131 offsetof(sys_logger_t, destroy));
132 free(this);
133 }
134
135 METHOD(daemon_t, keep_cap, void,
136 private_daemon_t *this, u_int cap)
137 {
138 #ifdef CAPABILITIES_LIBCAP
139 cap_set_flag(this->caps, CAP_EFFECTIVE, 1, &cap, CAP_SET);
140 cap_set_flag(this->caps, CAP_INHERITABLE, 1, &cap, CAP_SET);
141 cap_set_flag(this->caps, CAP_PERMITTED, 1, &cap, CAP_SET);
142 #endif /* CAPABILITIES_LIBCAP */
143 #ifdef CAPABILITIES_NATIVE
144 this->caps.effective |= 1 << cap;
145 this->caps.permitted |= 1 << cap;
146 this->caps.inheritable |= 1 << cap;
147 #endif /* CAPABILITIES_NATIVE */
148 }
149
150 METHOD(daemon_t, drop_capabilities, bool,
151 private_daemon_t *this)
152 {
153 #ifdef CAPABILITIES_LIBCAP
154 if (cap_set_proc(this->caps) != 0)
155 {
156 return FALSE;
157 }
158 #endif /* CAPABILITIES_LIBCAP */
159 #ifdef CAPABILITIES_NATIVE
160 struct __user_cap_header_struct header = {
161 .version = _LINUX_CAPABILITY_VERSION,
162 };
163 if (capset(&header, &this->caps) != 0)
164 {
165 return FALSE;
166 }
167 #endif /* CAPABILITIES_NATIVE */
168 return TRUE;
169 }
170
171 METHOD(daemon_t, start, void,
172 private_daemon_t *this)
173 {
174 /* start the engine, go multithreaded */
175 hydra->processor->set_threads(hydra->processor,
176 lib->settings->get_int(lib->settings, "charon.threads",
177 DEFAULT_THREADS));
178 }
179
180 /**
181 * Log loaded plugins
182 */
183 static void print_plugins()
184 {
185 char buf[512], *plugin;
186 int len = 0;
187 enumerator_t *enumerator;
188
189 buf[0] = '\0';
190 enumerator = lib->plugins->create_plugin_enumerator(lib->plugins);
191 while (len < sizeof(buf) && enumerator->enumerate(enumerator, &plugin))
192 {
193 len += snprintf(&buf[len], sizeof(buf)-len, "%s ", plugin);
194 }
195 enumerator->destroy(enumerator);
196 DBG1(DBG_DMN, "loaded plugins: %s", buf);
197 }
198
199 /**
200 * Initialize logging
201 */
202 static void initialize_loggers(private_daemon_t *this, bool use_stderr,
203 level_t levels[])
204 {
205 sys_logger_t *sys_logger;
206 file_logger_t *file_logger;
207 enumerator_t *enumerator;
208 char *facility, *filename;
209 int loggers_defined = 0;
210 debug_t group;
211 level_t def;
212 bool append, ike_name;
213 FILE *file;
214
215 /* setup sysloggers */
216 enumerator = lib->settings->create_section_enumerator(lib->settings,
217 "charon.syslog");
218 while (enumerator->enumerate(enumerator, &facility))
219 {
220 loggers_defined++;
221
222 ike_name = lib->settings->get_bool(lib->settings,
223 "charon.syslog.%s.ike_name", FALSE, facility);
224 if (streq(facility, "daemon"))
225 {
226 sys_logger = sys_logger_create(LOG_DAEMON, ike_name);
227 }
228 else if (streq(facility, "auth"))
229 {
230 sys_logger = sys_logger_create(LOG_AUTHPRIV, ike_name);
231 }
232 else
233 {
234 continue;
235 }
236 def = lib->settings->get_int(lib->settings,
237 "charon.syslog.%s.default", 1, facility);
238 for (group = 0; group < DBG_MAX; group++)
239 {
240 sys_logger->set_level(sys_logger, group,
241 lib->settings->get_int(lib->settings,
242 "charon.syslog.%s.%N", def,
243 facility, debug_lower_names, group));
244 }
245 this->public.sys_loggers->insert_last(this->public.sys_loggers,
246 sys_logger);
247 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
248 }
249 enumerator->destroy(enumerator);
250
251 /* and file loggers */
252 enumerator = lib->settings->create_section_enumerator(lib->settings,
253 "charon.filelog");
254 while (enumerator->enumerate(enumerator, &filename))
255 {
256 loggers_defined++;
257 if (streq(filename, "stderr"))
258 {
259 file = stderr;
260 }
261 else if (streq(filename, "stdout"))
262 {
263 file = stdout;
264 }
265 else
266 {
267 append = lib->settings->get_bool(lib->settings,
268 "charon.filelog.%s.append", TRUE, filename);
269 file = fopen(filename, append ? "a" : "w");
270 if (file == NULL)
271 {
272 DBG1(DBG_DMN, "opening file %s for logging failed: %s",
273 filename, strerror(errno));
274 continue;
275 }
276 if (lib->settings->get_bool(lib->settings,
277 "charon.filelog.%s.flush_line", FALSE, filename))
278 {
279 setlinebuf(file);
280 }
281 }
282 file_logger = file_logger_create(file,
283 lib->settings->get_str(lib->settings,
284 "charon.filelog.%s.time_format", NULL, filename),
285 lib->settings->get_bool(lib->settings,
286 "charon.filelog.%s.ike_name", FALSE, filename));
287 def = lib->settings->get_int(lib->settings,
288 "charon.filelog.%s.default", 1, filename);
289 for (group = 0; group < DBG_MAX; group++)
290 {
291 file_logger->set_level(file_logger, group,
292 lib->settings->get_int(lib->settings,
293 "charon.filelog.%s.%N", def,
294 filename, debug_lower_names, group));
295 }
296 this->public.file_loggers->insert_last(this->public.file_loggers,
297 file_logger);
298 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
299
300 }
301 enumerator->destroy(enumerator);
302
303 /* set up legacy style default loggers provided via command-line */
304 if (!loggers_defined)
305 {
306 /* set up default stdout file_logger */
307 file_logger = file_logger_create(stdout, NULL, FALSE);
308 this->public.bus->add_listener(this->public.bus, &file_logger->listener);
309 this->public.file_loggers->insert_last(this->public.file_loggers,
310 file_logger);
311 /* set up default daemon sys_logger */
312 sys_logger = sys_logger_create(LOG_DAEMON, FALSE);
313 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
314 this->public.sys_loggers->insert_last(this->public.sys_loggers,
315 sys_logger);
316 for (group = 0; group < DBG_MAX; group++)
317 {
318 sys_logger->set_level(sys_logger, group, levels[group]);
319 if (use_stderr)
320 {
321 file_logger->set_level(file_logger, group, levels[group]);
322 }
323 }
324
325 /* set up default auth sys_logger */
326 sys_logger = sys_logger_create(LOG_AUTHPRIV, FALSE);
327 this->public.bus->add_listener(this->public.bus, &sys_logger->listener);
328 this->public.sys_loggers->insert_last(this->public.sys_loggers,
329 sys_logger);
330 sys_logger->set_level(sys_logger, DBG_ANY, LEVEL_AUDIT);
331 }
332 }
333
334 METHOD(daemon_t, initialize, bool,
335 private_daemon_t *this, bool syslog, level_t levels[])
336 {
337 /* for uncritical pseudo random numbers */
338 srandom(time(NULL) + getpid());
339
340 /* setup bus and it's listeners first to enable log output */
341 this->public.bus = bus_create();
342 /* set up hook to log dbg message in library via charons message bus */
343 dbg_old = dbg;
344 dbg = dbg_bus;
345
346 initialize_loggers(this, !syslog, levels);
347
348 DBG1(DBG_DMN, "Starting IKEv2 charon daemon (strongSwan "VERSION")");
349
350 if (lib->integrity)
351 {
352 DBG1(DBG_DMN, "integrity tests enabled:");
353 DBG1(DBG_DMN, "lib 'libstrongswan': passed file and segment integrity tests");
354 DBG1(DBG_DMN, "lib 'libhydra': passed file and segment integrity tests");
355 DBG1(DBG_DMN, "lib 'libcharon': passed file and segment integrity tests");
356 DBG1(DBG_DMN, "daemon 'charon': passed file integrity test");
357 }
358
359 /* load secrets, ca certificates and crls */
360 this->public.scheduler = scheduler_create();
361 this->public.controller = controller_create();
362 this->public.eap = eap_manager_create();
363 this->public.sim = sim_manager_create();
364 this->public.backends = backend_manager_create();
365 this->public.kernel_interface = kernel_interface_create();
366 this->public.socket = socket_manager_create();
367 this->public.traps = trap_manager_create();
368
369 /* load plugins, further infrastructure may need it */
370 if (!lib->plugins->load(lib->plugins, NULL,
371 lib->settings->get_str(lib->settings, "charon.load", PLUGINS)))
372 {
373 return FALSE;
374 }
375
376 print_plugins();
377
378 this->public.ike_sa_manager = ike_sa_manager_create();
379 if (this->public.ike_sa_manager == NULL)
380 {
381 return FALSE;
382 }
383 this->public.sender = sender_create();
384 this->public.receiver = receiver_create();
385 if (this->public.receiver == NULL)
386 {
387 return FALSE;
388 }
389
390 #ifdef ME
391 this->public.connect_manager = connect_manager_create();
392 if (this->public.connect_manager == NULL)
393 {
394 return FALSE;
395 }
396 this->public.mediation_manager = mediation_manager_create();
397 #endif /* ME */
398
399 return TRUE;
400 }
401
402 /**
403 * Create the daemon.
404 */
405 private_daemon_t *daemon_create()
406 {
407 private_daemon_t *this;
408
409 INIT(this,
410 .public = {
411 .keep_cap = _keep_cap,
412 .drop_capabilities = _drop_capabilities,
413 .initialize = _initialize,
414 .start = _start,
415 .file_loggers = linked_list_create(),
416 .sys_loggers = linked_list_create(),
417 },
418 );
419
420 #ifdef CAPABILITIES
421 #ifdef CAPABILITIES_LIBCAP
422 this->caps = cap_init();
423 #endif /* CAPABILITIES_LIBCAP */
424 keep_cap(this, CAP_NET_ADMIN);
425 if (lib->leak_detective)
426 {
427 keep_cap(this, CAP_SYS_NICE);
428 }
429 #endif /* CAPABILITIES */
430
431 return this;
432 }
433
434 /**
435 * Described in header.
436 */
437 void libcharon_deinit()
438 {
439
440 destroy((private_daemon_t*)charon);
441 charon = NULL;
442 }
443
444 /**
445 * Described in header.
446 */
447 bool libcharon_init()
448 {
449 private_daemon_t *this;
450
451 this = daemon_create();
452 charon = &this->public;
453
454 lib->printf_hook->add_handler(lib->printf_hook, 'P',
455 proposal_printf_hook,
456 PRINTF_HOOK_ARGTYPE_POINTER,
457 PRINTF_HOOK_ARGTYPE_END);
458
459 if (lib->integrity &&
460 !lib->integrity->check(lib->integrity, "libcharon", libcharon_init))
461 {
462 dbg(DBG_DMN, 1, "integrity check of libcharon failed");
463 return FALSE;
464 }
465
466 return TRUE;
467 }