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 typedef struct private_daemon_t private_daemon_t;
  33
  34 /**
  35  * Private additions to daemon_t, contains threads and internal functions.
  36  */
  37 struct private_daemon_t {
  38         /**
  39          * Public members of daemon_t.
  40          */
  41         daemon_t public;
  42
  43         /**
  44          * Handler for kernel events
  45          */
  46         kernel_handler_t *kernel_handler;
  47 };
  48
  49 /**
  50  * One and only instance of the daemon.
  51  */
  52 daemon_t *charon;
  53
  54 /**
  55  * hook in library for debugging messages
  56  */
  57 extern void (*dbg) (debug_t group, level_t level, char *fmt, ...);
  58
  59 /**
  60  * we store the previous debug function so we can reset it
  61  */
  62 static void (*dbg_old) (debug_t group, level_t level, char *fmt, ...);
  63
  64 /**
  65  * Logging hook for library logs, spreads debug message over bus
  66  */
  67 static void dbg_bus(debug_t group, level_t level, char *fmt, ...)
  68 {
  69         va_list args;
  70
  71         va_start(args, fmt);
  72         charon->bus->vlog(charon->bus, group, level, fmt, args);
  73         va_end(args);
  74 }
  75
  76 /**
  77  * Clean up all daemon resources
  78  */
  79 static void destroy(private_daemon_t *this)
  80 {
  81         /* terminate all idle threads */
  82         lib->processor->set_threads(lib->processor, 0);
  83
  84         /* close all IKE_SAs */
  85         if (this->public.ike_sa_manager)
  86         {
  87                 this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
  88         }
  89         if (this->public.traps)
  90         {
  91                 this->public.traps->flush(this->public.traps);
  92         }
  93         if (this->public.sender)
  94         {
  95                 this->public.sender->flush(this->public.sender);
  96         }
  97
  98         /* cancel all threads and wait for their termination */
  99         lib->processor->cancel(lib->processor);
 100
 101         DESTROY_IF(this->public.receiver);
 102 #ifdef ME
 103         DESTROY_IF(this->public.connect_manager);
 104         DESTROY_IF(this->public.mediation_manager);
 105 #endif /* ME */
 106         /* make sure the cache is clear before unloading plugins */
 107         lib->credmgr->flush_cache(lib->credmgr, CERT_ANY);
 108         lib->plugins->unload(lib->plugins);
 109         DESTROY_IF(this->kernel_handler);
 110         DESTROY_IF(this->public.traps);
 111         DESTROY_IF(this->public.shunts);
 112         DESTROY_IF(this->public.ike_sa_manager);
 113         DESTROY_IF(this->public.controller);
 114         DESTROY_IF(this->public.eap);
 115         DESTROY_IF(this->public.xauth);
 116         DESTROY_IF(this->public.backends);
 117         DESTROY_IF(this->public.sender);
 118         DESTROY_IF(this->public.socket);
 119         DESTROY_IF(this->public.caps);
 120
 121         /* rehook library logging, shutdown logging */
 122         dbg = dbg_old;
 123         DESTROY_IF(this->public.bus);
 124         this->public.file_loggers->destroy_offset(this->public.file_loggers,
 125                                                                                         offsetof(file_logger_t, destroy));
 126         this->public.sys_loggers->destroy_offset(this->public.sys_loggers,
 127                                                                                         offsetof(sys_logger_t, destroy));
 128         free((void*)this->public.name);
 129         free(this);
 130 }
 131
 132 METHOD(daemon_t, start, void,
 133            private_daemon_t *this)
 134 {
 135         /* start the engine, go multithreaded */
 136         lib->processor->set_threads(lib->processor,
 137                                                 lib->settings->get_int(lib->settings, "%s.threads",
 138                                                                                            DEFAULT_THREADS, charon->name));
 139 }
 140
 141 METHOD(daemon_t, initialize, bool,
 142         private_daemon_t *this, char *plugins)
 143 {
 144         static plugin_feature_t features[] = {
 145                 PLUGIN_PROVIDE(CUSTOM, "libcharon"),
 146                         PLUGIN_DEPENDS(HASHER, HASH_SHA1),
 147                         PLUGIN_DEPENDS(RNG, RNG_STRONG),
 148                         PLUGIN_DEPENDS(NONCE_GEN),
 149                         PLUGIN_DEPENDS(CUSTOM, "kernel-ipsec"),
 150                         PLUGIN_DEPENDS(CUSTOM, "kernel-net"),
 151                         PLUGIN_DEPENDS(CUSTOM, "socket"),
 152         };
 153         lib->plugins->add_static_features(lib->plugins, charon->name, features,
 154                                                                           countof(features), TRUE);
 155
 156         /* load plugins, further infrastructure may need it */
 157         if (!lib->plugins->load(lib->plugins, NULL, plugins))
 158         {
 159                 return FALSE;
 160         }
 161         DBG1(DBG_DMN, "loaded plugins: %s",
 162                  lib->plugins->loaded_plugins(lib->plugins));
 163
 164         this->public.ike_sa_manager = ike_sa_manager_create();
 165         if (this->public.ike_sa_manager == NULL)
 166         {
 167                 return FALSE;
 168         }
 169         this->public.sender = sender_create();
 170         this->public.receiver = receiver_create();
 171         if (this->public.receiver == NULL)
 172         {
 173                 return FALSE;
 174         }
 175
 176         /* Queue start_action job */
 177         lib->processor->queue_job(lib->processor, (job_t*)start_action_job_create());
 178
 179 #ifdef ME
 180         this->public.connect_manager = connect_manager_create();
 181         if (this->public.connect_manager == NULL)
 182         {
 183                 return FALSE;
 184         }
 185         this->public.mediation_manager = mediation_manager_create();
 186 #endif /* ME */
 187
 188         return TRUE;
 189 }
 190
 191 /**
 192  * Create the daemon.
 193  */
 194 private_daemon_t *daemon_create(const char *name)
 195 {
 196         private_daemon_t *this;
 197
 198         INIT(this,
 199                 .public = {
 200                         .initialize = _initialize,
 201                         .start = _start,
 202                         .bus = bus_create(),
 203                         .file_loggers = linked_list_create(),
 204                         .sys_loggers = linked_list_create(),
 205                         .name = strdup(name ?: "libcharon"),
 206                 },
 207         );
 208         charon = &this->public;
 209         this->public.caps = capabilities_create();
 210         this->public.controller = controller_create();
 211         this->public.eap = eap_manager_create();
 212         this->public.xauth = xauth_manager_create();
 213         this->public.backends = backend_manager_create();
 214         this->public.socket = socket_manager_create();
 215         this->public.traps = trap_manager_create();
 216         this->public.shunts = shunt_manager_create();
 217         this->kernel_handler = kernel_handler_create();
 218
 219         this->public.caps->keep(this->public.caps, CAP_NET_ADMIN);
 220
 221         return this;
 222 }
 223
 224 /**
 225  * Described in header.
 226  */
 227 void libcharon_deinit()
 228 {
 229         destroy((private_daemon_t*)charon);
 230         charon = NULL;
 231 }
 232
 233 /**
 234  * Described in header.
 235  */
 236 bool libcharon_init(const char *name)
 237 {
 238         daemon_create(name);
 239
 240         /* for uncritical pseudo random numbers */
 241         srandom(time(NULL) + getpid());
 242
 243         /* set up hook to log dbg message in library via charons message bus */
 244         dbg_old = dbg;
 245         dbg = dbg_bus;
 246
 247         lib->printf_hook->add_handler(lib->printf_hook, 'P',
 248                                                                   proposal_printf_hook,
 249                                                                   PRINTF_HOOK_ARGTYPE_POINTER,
 250                                                                   PRINTF_HOOK_ARGTYPE_END);
 251
 252         if (lib->integrity &&
 253                 !lib->integrity->check(lib->integrity, "libcharon", libcharon_init))
 254         {
 255                 dbg(DBG_DMN, 1, "integrity check of libcharon failed");
 256                 return FALSE;
 257         }
 258
 259         return TRUE;
 260 }