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 unsigned int __connman_notifier_count_connected(void)
  95 {
  96         unsigned int i, count = 0;
  97
  98         __sync_synchronize();
  99         for (i = 0; i < MAX_TECHNOLOGIES; i++) {
 100                 if (connected[i] > 0)
 101                         count++;
 102         }
 103
 104         return count;
 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         count = __connman_notifier_count_connected();
 116         if (count > 0)
 117                 return "ready";
 118
 119         if ( __connman_technology_get_offlinemode() == TRUE)
 120                 return "offline";
 121
 122         return "idle";
 123 }
 124
 125 const char *__connman_notifier_get_state(void)
 126 {
 127         return notifier_state;
 128 }
 129
 130 static void state_changed(void)
 131 {
 132         const char *state;
 133
 134         state = evaluate_notifier_state();
 135
 136         if (g_strcmp0(state, notifier_state) == 0)
 137                 return;
 138
 139         notifier_state = state;
 140
 141         connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
 142                                 CONNMAN_MANAGER_INTERFACE, "State",
 143                                                 DBUS_TYPE_STRING, &notifier_state);
 144 }
 145
 146 static void technology_connected(enum connman_service_type type,
 147                                                 connman_bool_t connected)
 148 {
 149         DBG("type %d connected %d", type, connected);
 150
 151         __connman_technology_set_connected(type, connected);
 152         state_changed();
 153 }
 154
 155 void __connman_notifier_connect(enum connman_service_type type)
 156 {
 157         DBG("type %d", type);
 158
 159         switch (type) {
 160         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 161         case CONNMAN_SERVICE_TYPE_SYSTEM:
 162         case CONNMAN_SERVICE_TYPE_GPS:
 163         case CONNMAN_SERVICE_TYPE_VPN:
 164         case CONNMAN_SERVICE_TYPE_GADGET:
 165                 return;
 166         case CONNMAN_SERVICE_TYPE_ETHERNET:
 167         case CONNMAN_SERVICE_TYPE_WIFI:
 168         case CONNMAN_SERVICE_TYPE_WIMAX:
 169         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 170         case CONNMAN_SERVICE_TYPE_CELLULAR:
 171                 break;
 172         }
 173
 174         if (__sync_fetch_and_add(&connected[type], 1) == 0)
 175                 technology_connected(type, TRUE);
 176 }
 177
 178 void __connman_notifier_online(enum connman_service_type type)
 179 {
 180         DBG("type %d", type);
 181
 182         if (__sync_fetch_and_add(&online[type], 1) == 0)
 183                 state_changed();
 184 }
 185
 186 void __connman_notifier_disconnect(enum connman_service_type type,
 187                                         enum connman_service_state old_state)
 188 {
 189         DBG("type %d", type);
 190
 191         __sync_synchronize();
 192         if (connected[type] == 0) {
 193                 connman_error("notifier disconnect underflow");
 194                 return;
 195         }
 196
 197         switch (type) {
 198         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 199         case CONNMAN_SERVICE_TYPE_SYSTEM:
 200         case CONNMAN_SERVICE_TYPE_GPS:
 201         case CONNMAN_SERVICE_TYPE_VPN:
 202         case CONNMAN_SERVICE_TYPE_GADGET:
 203                 return;
 204         case CONNMAN_SERVICE_TYPE_ETHERNET:
 205         case CONNMAN_SERVICE_TYPE_WIFI:
 206         case CONNMAN_SERVICE_TYPE_WIMAX:
 207         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 208         case CONNMAN_SERVICE_TYPE_CELLULAR:
 209                 break;
 210         }
 211
 212         if (old_state == CONNMAN_SERVICE_STATE_ONLINE)
 213                 __sync_fetch_and_sub(&online[type], 1);
 214
 215         if (__sync_fetch_and_sub(&connected[type], 1) != 1)
 216                 return;
 217
 218         technology_connected(type, FALSE);
 219 }
 220
 221 static void technology_default(enum connman_service_type type)
 222 {
 223         const char *str;
 224
 225         str = __connman_service_type2string(type);
 226         if (str == NULL)
 227                 str = "";
 228
 229         connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
 230                         CONNMAN_MANAGER_INTERFACE, "DefaultTechnology",
 231                                                 DBUS_TYPE_STRING, &str);
 232 }
 233
 234 void __connman_notifier_default_changed(struct connman_service *service)
 235 {
 236         enum connman_service_type type = connman_service_get_type(service);
 237         GSList *list;
 238
 239         technology_default(type);
 240
 241         for (list = notifier_list; list; list = list->next) {
 242                 struct connman_notifier *notifier = list->data;
 243
 244                 if (notifier->default_changed)
 245                         notifier->default_changed(service);
 246         }
 247 }
 248
 249 void __connman_notifier_service_add(struct connman_service *service,
 250                                         const char *name)
 251 {
 252         GSList *list;
 253
 254         for (list = notifier_list; list; list = list->next) {
 255                 struct connman_notifier *notifier = list->data;
 256
 257                 if (notifier->service_add)
 258                         notifier->service_add(service, name);
 259         }
 260 }
 261
 262 void __connman_notifier_service_remove(struct connman_service *service)
 263 {
 264         GSList *list;
 265
 266         if (g_hash_table_lookup(service_hash, service) != NULL) {
 267                 /*
 268                  * This is a tempory check for consistency. It can be
 269                  * removed when there are no reports for the following
 270                  * error message.
 271                  */
 272                 connman_error("Service state machine inconsistency detected.");
 273
 274                 g_hash_table_remove(service_hash, service);
 275         }
 276
 277         for (list = notifier_list; list; list = list->next) {
 278                 struct connman_notifier *notifier = list->data;
 279
 280                 if (notifier->service_remove)
 281                         notifier->service_remove(service);
 282         }
 283 }
 284
 285 void __connman_notifier_proxy_changed(struct connman_service *service)
 286 {
 287         GSList *list;
 288
 289         for (list = notifier_list; list; list = list->next) {
 290                 struct connman_notifier *notifier = list->data;
 291
 292                 if (notifier->proxy_changed)
 293                         notifier->proxy_changed(service);
 294         }
 295 }
 296
 297 static void offlinemode_changed(dbus_bool_t enabled)
 298 {
 299         DBG("enabled %d", enabled);
 300
 301         connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
 302                                 CONNMAN_MANAGER_INTERFACE, "OfflineMode",
 303                                                 DBUS_TYPE_BOOLEAN, &enabled);
 304 }
 305
 306 void __connman_notifier_offlinemode(connman_bool_t enabled)
 307 {
 308         GSList *list;
 309
 310         DBG("enabled %d", enabled);
 311
 312         offlinemode_changed(enabled);
 313         state_changed();
 314
 315         for (list = notifier_list; list; list = list->next) {
 316                 struct connman_notifier *notifier = list->data;
 317
 318                 if (notifier->offline_mode)
 319                         notifier->offline_mode(enabled);
 320         }
 321 }
 322
 323 static void notify_idle_state(connman_bool_t idle)
 324 {
 325         GSList *list;
 326
 327         DBG("idle %d", idle);
 328
 329         for (list = notifier_list; list; list = list->next) {
 330                 struct connman_notifier *notifier = list->data;
 331
 332                 if (notifier->idle_state)
 333                         notifier->idle_state(idle);
 334         }
 335 }
 336
 337 void __connman_notifier_service_state_changed(struct connman_service *service,
 338                                         enum connman_service_state state)
 339 {
 340         GSList *list;
 341         unsigned int old_size;
 342         connman_bool_t found;
 343
 344         for (list = notifier_list; list; list = list->next) {
 345                 struct connman_notifier *notifier = list->data;
 346
 347                 if (notifier->service_state_changed)
 348                         notifier->service_state_changed(service, state);
 349         }
 350
 351         old_size = g_hash_table_size(service_hash);
 352         found = g_hash_table_lookup(service_hash, service) != NULL;
 353
 354         switch (state) {
 355         case CONNMAN_SERVICE_STATE_UNKNOWN:
 356         case CONNMAN_SERVICE_STATE_FAILURE:
 357         case CONNMAN_SERVICE_STATE_DISCONNECT:
 358         case CONNMAN_SERVICE_STATE_IDLE:
 359                 if (found == FALSE)
 360                         break;
 361
 362                 g_hash_table_remove(service_hash, service);
 363                 if (old_size == 1)
 364                         notify_idle_state(TRUE);
 365
 366                 break;
 367         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 368         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 369         case CONNMAN_SERVICE_STATE_READY:
 370         case CONNMAN_SERVICE_STATE_ONLINE:
 371                 if (found == TRUE)
 372                         break;
 373
 374                 g_hash_table_insert(service_hash, service, service);
 375                 if (old_size == 0)
 376                         notify_idle_state(FALSE);
 377
 378                 break;
 379         }
 380 }
 381
 382 void __connman_notifier_ipconfig_changed(struct connman_service *service,
 383                                         struct connman_ipconfig *ipconfig)
 384 {
 385         GSList *list;
 386
 387         for (list = notifier_list; list; list = list->next) {
 388                 struct connman_notifier *notifier = list->data;
 389
 390                 if (notifier->ipconfig_changed)
 391                         notifier->ipconfig_changed(service, ipconfig);
 392         }
 393 }
 394
 395 int __connman_notifier_init(void)
 396 {
 397         DBG("");
 398
 399         connection = connman_dbus_get_connection();
 400
 401         service_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 402                                                 NULL, NULL);
 403
 404         notifier_state = evaluate_notifier_state();
 405
 406         return 0;
 407 }
 408
 409 void __connman_notifier_cleanup(void)
 410 {
 411         DBG("");
 412
 413         g_hash_table_destroy(service_hash);
 414         service_hash = NULL;
 415
 416         dbus_connection_unref(connection);
 417 }