Added a dedicated sender flush method, delay sender destruction until users gone
[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 <time.h>
23
24 #ifdef CAPABILITIES
25 # ifdef HAVE_SYS_CAPABILITY_H
26 # include <sys/capability.h>
27 # elif defined(CAPABILITIES_NATIVE)
28 # include <linux/capability.h>
29 # endif /* CAPABILITIES_NATIVE */
30 #endif /* CAPABILITIES */
31
32 #include "daemon.h"
33
34 #include <library.h>
35 #include <plugins/plugin.h>
36 #include <config/proposal.h>
37 #include <kernel/kernel_handler.h>
38 #include <processing/jobs/start_action_job.h>
39
40 typedef struct private_daemon_t private_daemon_t;
41
42 /**
43 * Private additions to daemon_t, contains threads and internal functions.
44 */
45 struct private_daemon_t {
46 /**
47 * Public members of daemon_t.
48 */
49 daemon_t public;
50
51 /**
52 * Handler for kernel events
53 */
54 kernel_handler_t *kernel_handler;
55
56 /**
57 * capabilities to keep
58 */
59 #ifdef CAPABILITIES_LIBCAP
60 cap_t caps;
61 #endif /* CAPABILITIES_LIBCAP */
62 #ifdef CAPABILITIES_NATIVE
63 struct __user_cap_data_struct caps[2];
64 #endif /* CAPABILITIES_NATIVE */
65
66 };
67
68 /**
69 * One and only instance of the daemon.
70 */
71 daemon_t *charon;
72
73 /**
74 * hook in library for debugging messages
75 */
76 extern void (*dbg) (debug_t group, level_t level, char *fmt, ...);
77
78 /**
79 * we store the previous debug function so we can reset it
80 */
81 static void (*dbg_old) (debug_t group, level_t level, char *fmt, ...);
82
83 /**
84 * Logging hook for library logs, spreads debug message over bus
85 */
86 static void dbg_bus(debug_t group, level_t level, char *fmt, ...)
87 {
88 va_list args;
89
90 va_start(args, fmt);
91 charon->bus->vlog(charon->bus, group, level, fmt, args);
92 va_end(args);
93 }
94
95 /**
96 * Clean up all daemon resources
97 */
98 static void destroy(private_daemon_t *this)
99 {
100 /* terminate all idle threads */
101 lib->processor->set_threads(lib->processor, 0);
102
103 /* close all IKE_SAs */
104 if (this->public.ike_sa_manager)
105 {
106 this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
107 }
108 if (this->public.traps)
109 {
110 this->public.traps->flush(this->public.traps);
111 }
112 if (this->public.sender)
113 {
114 this->public.sender->flush(this->public.sender);
115 }
116 DESTROY_IF(this->public.receiver);
117 #ifdef ME
118 DESTROY_IF(this->public.connect_manager);
119 DESTROY_IF(this->public.mediation_manager);
120 #endif /* ME */
121 /* make sure the cache is clear before unloading plugins */
122 lib->credmgr->flush_cache(lib->credmgr, CERT_ANY);
123 /* unload plugins to release threads */
124 lib->plugins->unload(lib->plugins);
125 #ifdef CAPABILITIES_LIBCAP
126 cap_free(this->caps);
127 #endif /* CAPABILITIES_LIBCAP */
128 DESTROY_IF(this->kernel_handler);
129 DESTROY_IF(this->public.traps);
130 DESTROY_IF(this->public.shunts);
131 DESTROY_IF(this->public.ike_sa_manager);
132 DESTROY_IF(this->public.controller);
133 DESTROY_IF(this->public.eap);
134 DESTROY_IF(this->public.backends);
135 DESTROY_IF(this->public.sender);
136 DESTROY_IF(this->public.socket);
137
138 /* rehook library logging, shutdown logging */
139 dbg = dbg_old;
140 DESTROY_IF(this->public.bus);
141 this->public.file_loggers->destroy_offset(this->public.file_loggers,
142 offsetof(file_logger_t, destroy));
143 this->public.sys_loggers->destroy_offset(this->public.sys_loggers,
144 offsetof(sys_logger_t, destroy));
145 free(this);
146 }
147
148 METHOD(daemon_t, keep_cap, void,
149 private_daemon_t *this, u_int cap)
150 {
151 #ifdef CAPABILITIES_LIBCAP
152 cap_set_flag(this->caps, CAP_EFFECTIVE, 1, &cap, CAP_SET);
153 cap_set_flag(this->caps, CAP_INHERITABLE, 1, &cap, CAP_SET);
154 cap_set_flag(this->caps, CAP_PERMITTED, 1, &cap, CAP_SET);
155 #endif /* CAPABILITIES_LIBCAP */
156 #ifdef CAPABILITIES_NATIVE
157 int i = 0;
158
159 if (cap >= 32)
160 {
161 i++;
162 cap -= 32;
163 }
164 this->caps[i].effective |= 1 << cap;
165 this->caps[i].permitted |= 1 << cap;
166 this->caps[i].inheritable |= 1 << cap;
167 #endif /* CAPABILITIES_NATIVE */
168 }
169
170 METHOD(daemon_t, drop_capabilities, bool,
171 private_daemon_t *this)
172 {
173 #ifdef CAPABILITIES_LIBCAP
174 if (cap_set_proc(this->caps) != 0)
175 {
176 return FALSE;
177 }
178 #endif /* CAPABILITIES_LIBCAP */
179 #ifdef CAPABILITIES_NATIVE
180 struct __user_cap_header_struct header = {
181 #if defined(_LINUX_CAPABILITY_VERSION_3)
182 .version = _LINUX_CAPABILITY_VERSION_3,
183 #elif defined(_LINUX_CAPABILITY_VERSION_2)
184 .version = _LINUX_CAPABILITY_VERSION_2,
185 #elif defined(_LINUX_CAPABILITY_VERSION_1)
186 .version = _LINUX_CAPABILITY_VERSION_1,
187 #else
188 .version = _LINUX_CAPABILITY_VERSION,
189 #endif
190 };
191 if (capset(&header, this->caps) != 0)
192 {
193 return FALSE;
194 }
195 #endif /* CAPABILITIES_NATIVE */
196 return TRUE;
197 }
198
199 METHOD(daemon_t, start, void,
200 private_daemon_t *this)
201 {
202 /* start the engine, go multithreaded */
203 lib->processor->set_threads(lib->processor,
204 lib->settings->get_int(lib->settings, "charon.threads",
205 DEFAULT_THREADS));
206 }
207
208 METHOD(daemon_t, initialize, bool,
209 private_daemon_t *this)
210 {
211 DBG1(DBG_DMN, "Starting IKEv2 charon daemon (strongSwan "VERSION")");
212
213 if (lib->integrity)
214 {
215 DBG1(DBG_DMN, "integrity tests enabled:");
216 DBG1(DBG_DMN, "lib 'libstrongswan': passed file and segment integrity tests");
217 DBG1(DBG_DMN, "lib 'libhydra': passed file and segment integrity tests");
218 DBG1(DBG_DMN, "lib 'libcharon': passed file and segment integrity tests");
219 DBG1(DBG_DMN, "daemon 'charon': passed file integrity test");
220 }
221
222 /* load plugins, further infrastructure may need it */
223 if (!lib->plugins->load(lib->plugins, NULL,
224 lib->settings->get_str(lib->settings, "charon.load", PLUGINS)))
225 {
226 return FALSE;
227 }
228 DBG1(DBG_DMN, "loaded plugins: %s",
229 lib->plugins->loaded_plugins(lib->plugins));
230
231 this->public.ike_sa_manager = ike_sa_manager_create();
232 if (this->public.ike_sa_manager == NULL)
233 {
234 return FALSE;
235 }
236 this->public.sender = sender_create();
237 this->public.receiver = receiver_create();
238 if (this->public.receiver == NULL)
239 {
240 return FALSE;
241 }
242
243 /* Queue start_action job */
244 lib->processor->queue_job(lib->processor, (job_t*)start_action_job_create());
245
246 #ifdef ME
247 this->public.connect_manager = connect_manager_create();
248 if (this->public.connect_manager == NULL)
249 {
250 return FALSE;
251 }
252 this->public.mediation_manager = mediation_manager_create();
253 #endif /* ME */
254
255 return TRUE;
256 }
257
258 /**
259 * Create the daemon.
260 */
261 private_daemon_t *daemon_create()
262 {
263 private_daemon_t *this;
264
265 INIT(this,
266 .public = {
267 .keep_cap = _keep_cap,
268 .drop_capabilities = _drop_capabilities,
269 .initialize = _initialize,
270 .start = _start,
271 .bus = bus_create(),
272 .file_loggers = linked_list_create(),
273 .sys_loggers = linked_list_create(),
274 },
275 );
276 charon = &this->public;
277 this->public.controller = controller_create();
278 this->public.eap = eap_manager_create();
279 this->public.backends = backend_manager_create();
280 this->public.socket = socket_manager_create();
281 this->public.traps = trap_manager_create();
282 this->public.shunts = shunt_manager_create();
283 this->kernel_handler = kernel_handler_create();
284
285 #ifdef CAPABILITIES
286 #ifdef CAPABILITIES_LIBCAP
287 this->caps = cap_init();
288 #endif /* CAPABILITIES_LIBCAP */
289 keep_cap(this, CAP_NET_ADMIN);
290 if (lib->leak_detective)
291 {
292 keep_cap(this, CAP_SYS_NICE);
293 }
294 #endif /* CAPABILITIES */
295
296 return this;
297 }
298
299 /**
300 * Described in header.
301 */
302 void libcharon_deinit()
303 {
304 destroy((private_daemon_t*)charon);
305 charon = NULL;
306 }
307
308 /**
309 * Described in header.
310 */
311 bool libcharon_init()
312 {
313 daemon_create();
314
315 /* for uncritical pseudo random numbers */
316 srandom(time(NULL) + getpid());
317
318 /* set up hook to log dbg message in library via charons message bus */
319 dbg_old = dbg;
320 dbg = dbg_bus;
321
322 lib->printf_hook->add_handler(lib->printf_hook, 'P',
323 proposal_printf_hook,
324 PRINTF_HOOK_ARGTYPE_POINTER,
325 PRINTF_HOOK_ARGTYPE_END);
326
327 if (lib->integrity &&
328 !lib->integrity->check(lib->integrity, "libcharon", libcharon_init))
329 {
330 dbg(DBG_DMN, 1, "integrity check of libcharon failed");
331 return FALSE;
332 }
333
334 return TRUE;
335 }