src/notifier.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <gdbus.h>
  27
  28 #include "connman.h"
  29
  30 static DBusConnection *connection = NULL;
  31
  32 static GSList *notifier_list = NULL;
  33 static GHashTable *service_hash = NULL;
  34
  35 static const char *notifier_state;
  36
  37 static gint compare_priority(gconstpointer a, gconstpointer b)
  38 {
  39         const struct connman_notifier *notifier1 = a;
  40         const struct connman_notifier *notifier2 = b;
  41
  42         return notifier2->priority - notifier1->priority;
  43 }
  44
  45 /**
  46  * connman_notifier_register:
  47  * @notifier: notifier module
  48  *
  49  * Register a new notifier module
  50  *
  51  * Returns: %0 on success
  52  */
  53 int connman_notifier_register(struct connman_notifier *notifier)
  54 {
  55         DBG("notifier %p name %s", notifier, notifier->name);
  56
  57         notifier_list = g_slist_insert_sorted(notifier_list, notifier,
  58                                                         compare_priority);
  59
  60         return 0;
  61 }
  62
  63 /**
  64  * connman_notifier_unregister:
  65  * @notifier: notifier module
  66  *
  67  * Remove a previously registered notifier module
  68  */
  69 void connman_notifier_unregister(struct connman_notifier *notifier)
  70 {
  71         DBG("notifier %p name %s", notifier, notifier->name);
  72
  73         notifier_list = g_slist_remove(notifier_list, notifier);
  74 }
  75
  76 #define MAX_TECHNOLOGIES 10
  77
  78 static int connected[MAX_TECHNOLOGIES];
  79 static int online[MAX_TECHNOLOGIES];
  80
  81 static unsigned int notifier_count_online(void)
  82 {
  83         unsigned int i, count = 0;
  84
  85         __sync_synchronize();
  86         for (i = 0; i < MAX_TECHNOLOGIES; i++) {
  87                 if (online[i] > 0)
  88                         count++;
  89         }
  90
  91         return count;
  92 }
  93
  94 connman_bool_t __connman_notifier_is_connected(void)
  95 {
  96         unsigned int i;
  97
  98         __sync_synchronize();
  99         for (i = 0; i < MAX_TECHNOLOGIES; i++) {
 100                 if (connected[i] > 0)
 101                         return TRUE;
 102         }
 103
 104         return FALSE;
 105 }
 106
 107 static const char *evaluate_notifier_state(void)
 108 {
 109         unsigned int count;
 110
 111         count = notifier_count_online();
 112         if (count > 0)
 113                 return "online";
 114
 115         if (__connman_notifier_is_connected() == TRUE)
 116                 return "ready";
 117
 118         if ( __connman_technology_get_offlinemode() == TRUE)
 119                 return "offline";
 120
 121         return "idle";
 122 }
 123
 124 const char *__connman_notifier_get_state(void)
 125 {
 126         return notifier_state;
 127 }
 128
 129 static void state_changed(void)
 130 {
 131         const char *state;
 132
 133         state = evaluate_notifier_state();
 134
 135         if (g_strcmp0(state, notifier_state) == 0)
 136                 return;
 137
 138         notifier_state = state;
 139
 140         connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
 141                                 CONNMAN_MANAGER_INTERFACE, "State",
 142                                                 DBUS_TYPE_STRING, &notifier_state);
 143 }
 144
 145 static void technology_connected(enum connman_service_type type,
 146                                                 connman_bool_t connected)
 147 {
 148         DBG("type %d connected %d", type, connected);
 149
 150         __connman_technology_set_connected(type, connected);
 151         state_changed();
 152 }
 153
 154 void __connman_notifier_connect(enum connman_service_type type)
 155 {
 156         DBG("type %d", type);
 157
 158         switch (type) {
 159         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 160         case CONNMAN_SERVICE_TYPE_SYSTEM:
 161         case CONNMAN_SERVICE_TYPE_GPS:
 162         case CONNMAN_SERVICE_TYPE_VPN:
 163         case CONNMAN_SERVICE_TYPE_GADGET:
 164                 return;
 165         case CONNMAN_SERVICE_TYPE_ETHERNET:
 166         case CONNMAN_SERVICE_TYPE_WIFI:
 167         case CONNMAN_SERVICE_TYPE_WIMAX:
 168         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 169         case CONNMAN_SERVICE_TYPE_CELLULAR:
 170                 break;
 171         }
 172
 173         if (__sync_fetch_and_add(&connected[type], 1) == 0)
 174                 technology_connected(type, TRUE);
 175 }
 176
 177 void __connman_notifier_online(enum connman_service_type type)
 178 {
 179         DBG("type %d", type);
 180
 181         if (__sync_fetch_and_add(&online[type], 1) == 0)
 182                 state_changed();
 183 }
 184
 185 void __connman_notifier_disconnect(enum connman_service_type type,
 186                                         enum connman_service_state old_state)
 187 {
 188         DBG("type %d", type);
 189
 190         __sync_synchronize();
 191         if (connected[type] == 0) {
 192                 connman_error("notifier disconnect underflow");
 193                 return;
 194         }
 195
 196         switch (type) {
 197         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 198         case CONNMAN_SERVICE_TYPE_SYSTEM:
 199         case CONNMAN_SERVICE_TYPE_GPS:
 200         case CONNMAN_SERVICE_TYPE_VPN:
 201         case CONNMAN_SERVICE_TYPE_GADGET:
 202                 return;
 203         case CONNMAN_SERVICE_TYPE_ETHERNET:
 204         case CONNMAN_SERVICE_TYPE_WIFI:
 205         case CONNMAN_SERVICE_TYPE_WIMAX:
 206         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 207         case CONNMAN_SERVICE_TYPE_CELLULAR:
 208                 break;
 209         }
 210
 211         if (old_state == CONNMAN_SERVICE_STATE_ONLINE)
 212                 __sync_fetch_and_sub(&online[type], 1);
 213
 214         if (__sync_fetch_and_sub(&connected[type], 1) != 1)
 215                 return;
 216
 217         technology_connected(type, FALSE);
 218 }
 219
 220 static void technology_default(enum connman_service_type type)
 221 {
 222         const char *str;
 223
 224         str = __connman_service_type2string(type);
 225         if (str == NULL)
 226                 str = "";
 227
 228         connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
 229                         CONNMAN_MANAGER_INTERFACE, "DefaultTechnology",
 230                                                 DBUS_TYPE_STRING, &str);
 231 }
 232
 233 void __connman_notifier_default_changed(struct connman_service *service)
 234 {
 235         enum connman_service_type type = connman_service_get_type(service);
 236         GSList *list;
 237
 238         technology_default(type);
 239
 240         for (list = notifier_list; list; list = list->next) {
 241                 struct connman_notifier *notifier = list->data;
 242
 243                 if (notifier->default_changed)
 244                         notifier->default_changed(service);
 245         }
 246 }
 247
 248 void __connman_notifier_service_add(struct connman_service *service,
 249                                         const char *name)
 250 {
 251         GSList *list;
 252
 253         for (list = notifier_list; list; list = list->next) {
 254                 struct connman_notifier *notifier = list->data;
 255
 256                 if (notifier->service_add)
 257                         notifier->service_add(service, name);
 258         }
 259 }
 260
 261 void __connman_notifier_service_remove(struct connman_service *service)
 262 {
 263         GSList *list;
 264
 265         if (g_hash_table_lookup(service_hash, service) != NULL) {
 266                 /*
 267                  * This is a tempory check for consistency. It can be
 268                  * removed when there are no reports for the following
 269                  * error message.
 270                  */
 271                 connman_error("Service state machine inconsistency detected.");
 272
 273                 g_hash_table_remove(service_hash, service);
 274         }
 275
 276         for (list = notifier_list; list; list = list->next) {
 277                 struct connman_notifier *notifier = list->data;
 278
 279                 if (notifier->service_remove)
 280                         notifier->service_remove(service);
 281         }
 282 }
 283
 284 void __connman_notifier_proxy_changed(struct connman_service *service)
 285 {
 286         GSList *list;
 287
 288         for (list = notifier_list; list; list = list->next) {
 289                 struct connman_notifier *notifier = list->data;
 290
 291                 if (notifier->proxy_changed)
 292                         notifier->proxy_changed(service);
 293         }
 294 }
 295
 296 static void offlinemode_changed(dbus_bool_t enabled)
 297 {
 298         DBG("enabled %d", enabled);
 299
 300         connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
 301                                 CONNMAN_MANAGER_INTERFACE, "OfflineMode",
 302                                                 DBUS_TYPE_BOOLEAN, &enabled);
 303 }
 304
 305 void __connman_notifier_offlinemode(connman_bool_t enabled)
 306 {
 307         GSList *list;
 308
 309         DBG("enabled %d", enabled);
 310
 311         offlinemode_changed(enabled);
 312         state_changed();
 313
 314         for (list = notifier_list; list; list = list->next) {
 315                 struct connman_notifier *notifier = list->data;
 316
 317                 if (notifier->offline_mode)
 318                         notifier->offline_mode(enabled);
 319         }
 320 }
 321
 322 static void notify_idle_state(connman_bool_t idle)
 323 {
 324         GSList *list;
 325
 326         DBG("idle %d", idle);
 327
 328         for (list = notifier_list; list; list = list->next) {
 329                 struct connman_notifier *notifier = list->data;
 330
 331                 if (notifier->idle_state)
 332                         notifier->idle_state(idle);
 333         }
 334 }
 335
 336 void __connman_notifier_service_state_changed(struct connman_service *service,
 337                                         enum connman_service_state state)
 338 {
 339         GSList *list;
 340         unsigned int old_size;
 341         connman_bool_t found;
 342
 343         for (list = notifier_list; list; list = list->next) {
 344                 struct connman_notifier *notifier = list->data;
 345
 346                 if (notifier->service_state_changed)
 347                         notifier->service_state_changed(service, state);
 348         }
 349
 350         old_size = g_hash_table_size(service_hash);
 351         found = g_hash_table_lookup(service_hash, service) != NULL;
 352
 353         switch (state) {
 354         case CONNMAN_SERVICE_STATE_UNKNOWN:
 355         case CONNMAN_SERVICE_STATE_FAILURE:
 356         case CONNMAN_SERVICE_STATE_DISCONNECT:
 357         case CONNMAN_SERVICE_STATE_IDLE:
 358                 if (found == FALSE)
 359                         break;
 360
 361                 g_hash_table_remove(service_hash, service);
 362                 if (old_size == 1)
 363                         notify_idle_state(TRUE);
 364
 365                 break;
 366         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 367         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 368         case CONNMAN_SERVICE_STATE_READY:
 369         case CONNMAN_SERVICE_STATE_ONLINE:
 370                 if (found == TRUE)
 371                         break;
 372
 373                 g_hash_table_insert(service_hash, service, service);
 374                 if (old_size == 0)
 375                         notify_idle_state(FALSE);
 376
 377                 break;
 378         }
 379 }
 380
 381 void __connman_notifier_ipconfig_changed(struct connman_service *service,
 382                                         struct connman_ipconfig *ipconfig)
 383 {
 384         GSList *list;
 385
 386         for (list = notifier_list; list; list = list->next) {
 387                 struct connman_notifier *notifier = list->data;
 388
 389                 if (notifier->ipconfig_changed)
 390                         notifier->ipconfig_changed(service, ipconfig);
 391         }
 392 }
 393
 394 int __connman_notifier_init(void)
 395 {
 396         DBG("");
 397
 398         connection = connman_dbus_get_connection();
 399
 400         service_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 401                                                 NULL, NULL);
 402
 403         notifier_state = evaluate_notifier_state();
 404
 405         return 0;
 406 }
 407
 408 void __connman_notifier_cleanup(void)
 409 {
 410         DBG("");
 411
 412         g_hash_table_destroy(service_hash);
 413         service_hash = NULL;
 414
 415         dbus_connection_unref(connection);
 416 }