src/libcharon/daemon.c

   1 /*
   2  * Copyright (C) 2006-2012 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 #include "daemon.h"
  25
  26 #include <library.h>
  27 #include <plugins/plugin_feature.h>
  28 #include <config/proposal.h>
  29 #include <kernel/kernel_handler.h>
  30 #include <processing/jobs/start_action_job.h>
  31
  32 #ifndef CAP_NET_ADMIN
  33 #define CAP_NET_ADMIN 12
  34 #endif
  35
  36 typedef struct private_daemon_t private_daemon_t;
  37
  38 /**
  39  * Private additions to daemon_t, contains threads and internal functions.
  40  */
  41 struct private_daemon_t {
  42         /**
  43          * Public members of daemon_t.
  44          */
  45         daemon_t public;
  46
  47         /**
  48          * Handler for kernel events
  49          */
  50         kernel_handler_t *kernel_handler;
  51 };
  52
  53 /**
  54  * One and only instance of the daemon.
  55  */
  56 daemon_t *charon;
  57
  58 /**
  59  * hook in library for debugging messages
  60  */
  61 extern void (*dbg) (debug_t group, level_t level, char *fmt, ...);
  62
  63 /**
  64  * we store the previous debug function so we can reset it
  65  */
  66 static void (*dbg_old) (debug_t group, level_t level, char *fmt, ...);
  67
  68 /**
  69  * Logging hook for library logs, spreads debug message over bus
  70  */
  71 static void dbg_bus(debug_t group, level_t level, char *fmt, ...)
  72 {
  73         va_list args;
  74
  75         va_start(args, fmt);
  76         charon->bus->vlog(charon->bus, group, level, fmt, args);
  77         va_end(args);
  78 }
  79
  80 /**
  81  * Clean up all daemon resources
  82  */
  83 static void destroy(private_daemon_t *this)
  84 {
  85         /* terminate all idle threads */
  86         lib->processor->set_threads(lib->processor, 0);
  87
  88         /* close all IKE_SAs */
  89         if (this->public.ike_sa_manager)
  90         {
  91                 this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
  92         }
  93         if (this->public.traps)
  94         {
  95                 this->public.traps->flush(this->public.traps);
  96         }
  97         if (this->public.sender)
  98         {
  99                 this->public.sender->flush(this->public.sender);
 100         }
 101
 102         /* cancel all threads and wait for their termination */
 103         lib->processor->cancel(lib->processor);
 104
 105         DESTROY_IF(this->public.receiver);
 106 #ifdef ME
 107         DESTROY_IF(this->public.connect_manager);
 108         DESTROY_IF(this->public.mediation_manager);
 109 #endif /* ME */
 110         /* make sure the cache is clear before unloading plugins */
 111         lib->credmgr->flush_cache(lib->credmgr, CERT_ANY);
 112         lib->plugins->unload(lib->plugins);
 113         DESTROY_IF(this->kernel_handler);
 114         DESTROY_IF(this->public.traps);
 115         DESTROY_IF(this->public.shunts);
 116         DESTROY_IF(this->public.ike_sa_manager);
 117         DESTROY_IF(this->public.controller);
 118         DESTROY_IF(this->public.eap);
 119         DESTROY_IF(this->public.xauth);
 120         DESTROY_IF(this->public.backends);
 121         DESTROY_IF(this->public.sender);
 122         DESTROY_IF(this->public.socket);
 123         DESTROY_IF(this->public.caps);
 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((void*)this->public.name);
 133         free(this);
 134 }
 135
 136 METHOD(daemon_t, start, void,
 137            private_daemon_t *this)
 138 {
 139         /* start the engine, go multithreaded */
 140         lib->processor->set_threads(lib->processor,
 141                                                 lib->settings->get_int(lib->settings, "%s.threads",
 142                                                                                            DEFAULT_THREADS, charon->name));
 143 }
 144
 145 METHOD(daemon_t, initialize, bool,
 146         private_daemon_t *this, char *plugins)
 147 {
 148         static plugin_feature_t features[] = {
 149                 PLUGIN_PROVIDE(CUSTOM, "libcharon"),
 150                         PLUGIN_DEPENDS(HASHER, HASH_SHA1),
 151                         PLUGIN_DEPENDS(RNG, RNG_STRONG),
 152                         PLUGIN_DEPENDS(NONCE_GEN),
 153                         PLUGIN_DEPENDS(CUSTOM, "kernel-ipsec"),
 154                         PLUGIN_DEPENDS(CUSTOM, "kernel-net"),
 155                         PLUGIN_DEPENDS(CUSTOM, "socket"),
 156         };
 157         lib->plugins->add_static_features(lib->plugins, charon->name, features,
 158                                                                           countof(features), TRUE);
 159
 160         /* load plugins, further infrastructure may need it */
 161         if (!lib->plugins->load(lib->plugins, NULL, plugins))
 162         {
 163                 return FALSE;
 164         }
 165         DBG1(DBG_DMN, "loaded plugins: %s",
 166                  lib->plugins->loaded_plugins(lib->plugins));
 167
 168         this->public.ike_sa_manager = ike_sa_manager_create();
 169         if (this->public.ike_sa_manager == NULL)
 170         {
 171                 return FALSE;
 172         }
 173         this->public.sender = sender_create();
 174         this->public.receiver = receiver_create();
 175         if (this->public.receiver == NULL)
 176         {
 177                 return FALSE;
 178         }
 179
 180         /* Queue start_action job */
 181         lib->processor->queue_job(lib->processor, (job_t*)start_action_job_create());
 182
 183 #ifdef ME
 184         this->public.connect_manager = connect_manager_create();
 185         if (this->public.connect_manager == NULL)
 186         {
 187                 return FALSE;
 188         }
 189         this->public.mediation_manager = mediation_manager_create();
 190 #endif /* ME */
 191
 192         return TRUE;
 193 }
 194
 195 /**
 196  * Create the daemon.
 197  */
 198 private_daemon_t *daemon_create(const char *name)
 199 {
 200         private_daemon_t *this;
 201
 202         INIT(this,
 203                 .public = {
 204                         .initialize = _initialize,
 205                         .start = _start,
 206                         .bus = bus_create(),
 207                         .file_loggers = linked_list_create(),
 208                         .sys_loggers = linked_list_create(),
 209                         .name = strdup(name ?: "libcharon"),
 210                 },
 211         );
 212         charon = &this->public;
 213         this->public.caps = capabilities_create();
 214         this->public.controller = controller_create();
 215         this->public.eap = eap_manager_create();
 216         this->public.xauth = xauth_manager_create();
 217         this->public.backends = backend_manager_create();
 218         this->public.socket = socket_manager_create();
 219         this->public.traps = trap_manager_create();
 220         this->public.shunts = shunt_manager_create();
 221         this->kernel_handler = kernel_handler_create();
 222
 223         this->public.caps->keep(this->public.caps, CAP_NET_ADMIN);
 224
 225         return this;
 226 }
 227
 228 /**
 229  * Described in header.
 230  */
 231 void libcharon_deinit()
 232 {
 233         destroy((private_daemon_t*)charon);
 234         charon = NULL;
 235 }
 236
 237 /**
 238  * Described in header.
 239  */
 240 bool libcharon_init(const char *name)
 241 {
 242         daemon_create(name);
 243
 244         /* for uncritical pseudo random numbers */
 245         srandom(time(NULL) + getpid());
 246
 247         /* set up hook to log dbg message in library via charons message bus */
 248         dbg_old = dbg;
 249         dbg = dbg_bus;
 250
 251         lib->printf_hook->add_handler(lib->printf_hook, 'P',
 252                                                                   proposal_printf_hook,
 253                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 254                                                                   PRINTF_HOOK_ARGTYPE_END);
 255
 256         if (lib->integrity &&
 257                 !lib->integrity->check(lib->integrity, "libcharon", libcharon_init))
 258         {
 259                 dbg(DBG_DMN, 1, "integrity check of libcharon failed");
 260                 return FALSE;
 261         }
 262
 263         return TRUE;
 264 }