src/technology.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;
  31
  32 static GHashTable *rfkill_table;
  33 static GHashTable *device_table;
  34 static GSList *technology_list = NULL;
  35
  36 struct connman_rfkill {
  37         unsigned int index;
  38         enum connman_service_type type;
  39         connman_bool_t softblock;
  40         connman_bool_t hardblock;
  41 };
  42
  43 enum connman_technology_state {
  44         CONNMAN_TECHNOLOGY_STATE_UNKNOWN   = 0,
  45         CONNMAN_TECHNOLOGY_STATE_OFFLINE   = 1,
  46         CONNMAN_TECHNOLOGY_STATE_AVAILABLE = 2,
  47         CONNMAN_TECHNOLOGY_STATE_BLOCKED   = 3,
  48         CONNMAN_TECHNOLOGY_STATE_ENABLED   = 4,
  49         CONNMAN_TECHNOLOGY_STATE_CONNECTED = 5,
  50 };
  51
  52 struct connman_technology {
  53         gint refcount;
  54         enum connman_service_type type;
  55         enum connman_technology_state state;
  56         char *path;
  57         GHashTable *rfkill_list;
  58         GSList *device_list;
  59         gint enabled;
  60         gint blocked;
  61
  62         struct connman_technology_driver *driver;
  63         void *driver_data;
  64 };
  65
  66 static GSList *driver_list = NULL;
  67
  68 static gint compare_priority(gconstpointer a, gconstpointer b)
  69 {
  70         const struct connman_technology_driver *driver1 = a;
  71         const struct connman_technology_driver *driver2 = b;
  72
  73         return driver2->priority - driver1->priority;
  74 }
  75
  76 /**
  77  * connman_technology_driver_register:
  78  * @driver: Technology driver definition
  79  *
  80  * Register a new technology driver
  81  *
  82  * Returns: %0 on success
  83  */
  84 int connman_technology_driver_register(struct connman_technology_driver *driver)
  85 {
  86         DBG("driver %p name %s", driver, driver->name);
  87
  88         driver_list = g_slist_insert_sorted(driver_list, driver,
  89                                                         compare_priority);
  90
  91         return 0;
  92 }
  93
  94 /**
  95  * connman_technology_driver_unregister:
  96  * @driver: Technology driver definition
  97  *
  98  * Remove a previously registered technology driver
  99  */
 100 void connman_technology_driver_unregister(struct connman_technology_driver *driver)
 101 {
 102         DBG("driver %p name %s", driver, driver->name);
 103
 104         driver_list = g_slist_remove(driver_list, driver);
 105 }
 106
 107 void __connman_technology_add_interface(enum connman_service_type type,
 108                                 int index, const char *name, const char *ident)
 109 {
 110         GSList *list;
 111
 112         switch (type) {
 113         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 114         case CONNMAN_SERVICE_TYPE_SYSTEM:
 115                 return;
 116         case CONNMAN_SERVICE_TYPE_ETHERNET:
 117         case CONNMAN_SERVICE_TYPE_WIFI:
 118         case CONNMAN_SERVICE_TYPE_WIMAX:
 119         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 120         case CONNMAN_SERVICE_TYPE_CELLULAR:
 121         case CONNMAN_SERVICE_TYPE_GPS:
 122         case CONNMAN_SERVICE_TYPE_VPN:
 123                 break;
 124         }
 125
 126         connman_info("Create interface %s [ %s ]", name,
 127                                 __connman_service_type2string(type));
 128
 129         for (list = technology_list; list; list = list->next) {
 130                 struct connman_technology *technology = list->data;
 131
 132                 if (technology->type != type)
 133                         continue;
 134
 135                 if (technology->driver == NULL)
 136                         continue;
 137
 138                 if (technology->driver->add_interface)
 139                         technology->driver->add_interface(technology,
 140                                                         index, name, ident);
 141         }
 142 }
 143
 144 void __connman_technology_remove_interface(enum connman_service_type type,
 145                                 int index, const char *name, const char *ident)
 146 {
 147         GSList *list;
 148
 149         switch (type) {
 150         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 151         case CONNMAN_SERVICE_TYPE_SYSTEM:
 152                 return;
 153         case CONNMAN_SERVICE_TYPE_ETHERNET:
 154         case CONNMAN_SERVICE_TYPE_WIFI:
 155         case CONNMAN_SERVICE_TYPE_WIMAX:
 156         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 157         case CONNMAN_SERVICE_TYPE_CELLULAR:
 158         case CONNMAN_SERVICE_TYPE_GPS:
 159         case CONNMAN_SERVICE_TYPE_VPN:
 160                 break;
 161         }
 162
 163         connman_info("Remove interface %s [ %s ]", name,
 164                                 __connman_service_type2string(type));
 165
 166         for (list = technology_list; list; list = list->next) {
 167                 struct connman_technology *technology = list->data;
 168
 169                 if (technology->type != type)
 170                         continue;
 171
 172                 if (technology->driver == NULL)
 173                         continue;
 174
 175                 if (technology->driver->remove_interface)
 176                         technology->driver->remove_interface(technology, index);
 177         }
 178 }
 179
 180 static int set_tethering(const char *bridge, connman_bool_t enabled)
 181 {
 182         GSList *list;
 183
 184         for (list = technology_list; list; list = list->next) {
 185                 struct connman_technology *technology = list->data;
 186
 187                 if (technology->driver == NULL)
 188                         continue;
 189
 190                 if (technology->driver->set_tethering)
 191                         technology->driver->set_tethering(technology, bridge, enabled);
 192         }
 193
 194         return 0;
 195 }
 196
 197 int __connman_technology_enable_tethering(const char *bridge)
 198 {
 199         return set_tethering(bridge, TRUE);
 200 }
 201
 202 int __connman_technology_disable_tethering(const char *bridge)
 203 {
 204         return set_tethering(bridge, FALSE);
 205 }
 206
 207 static void free_rfkill(gpointer data)
 208 {
 209         struct connman_rfkill *rfkill = data;
 210
 211         g_free(rfkill);
 212 }
 213
 214 void __connman_technology_list(DBusMessageIter *iter, void *user_data)
 215 {
 216         GSList *list;
 217
 218         for (list = technology_list; list; list = list->next) {
 219                 struct connman_technology *technology = list->data;
 220
 221                 if (technology->path == NULL)
 222                         continue;
 223
 224                 dbus_message_iter_append_basic(iter, DBUS_TYPE_OBJECT_PATH,
 225                                                         &technology->path);
 226         }
 227 }
 228
 229 static void technologies_changed(void)
 230 {
 231         connman_dbus_property_changed_array(CONNMAN_MANAGER_PATH,
 232                         CONNMAN_MANAGER_INTERFACE, "Technologies",
 233                         DBUS_TYPE_OBJECT_PATH, __connman_technology_list, NULL);
 234 }
 235
 236 static const char *state2string(enum connman_technology_state state)
 237 {
 238         switch (state) {
 239         case CONNMAN_TECHNOLOGY_STATE_UNKNOWN:
 240                 break;
 241         case CONNMAN_TECHNOLOGY_STATE_OFFLINE:
 242                 return "offline";
 243         case CONNMAN_TECHNOLOGY_STATE_AVAILABLE:
 244                 return "available";
 245         case CONNMAN_TECHNOLOGY_STATE_BLOCKED:
 246                 return "blocked";
 247         case CONNMAN_TECHNOLOGY_STATE_ENABLED:
 248                 return "enabled";
 249         case CONNMAN_TECHNOLOGY_STATE_CONNECTED:
 250                 return "connected";
 251         }
 252
 253         return NULL;
 254 }
 255
 256 static void state_changed(struct connman_technology *technology)
 257 {
 258         const char *str;
 259
 260         str = state2string(technology->state);
 261         if (str == NULL)
 262                 return;
 263
 264         connman_dbus_property_changed_basic(technology->path,
 265                                 CONNMAN_TECHNOLOGY_INTERFACE, "State",
 266                                                 DBUS_TYPE_STRING, &str);
 267 }
 268
 269 static const char *get_name(enum connman_service_type type)
 270 {
 271         switch (type) {
 272         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 273         case CONNMAN_SERVICE_TYPE_SYSTEM:
 274         case CONNMAN_SERVICE_TYPE_GPS:
 275         case CONNMAN_SERVICE_TYPE_VPN:
 276                 break;
 277         case CONNMAN_SERVICE_TYPE_ETHERNET:
 278                 return "Wired";
 279         case CONNMAN_SERVICE_TYPE_WIFI:
 280                 return "WiFi";
 281         case CONNMAN_SERVICE_TYPE_WIMAX:
 282                 return "WiMAX";
 283         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 284                 return "Bluetooth";
 285         case CONNMAN_SERVICE_TYPE_CELLULAR:
 286                 return "3G";
 287         }
 288
 289         return NULL;
 290 }
 291
 292 static DBusMessage *get_properties(DBusConnection *conn,
 293                                         DBusMessage *message, void *user_data)
 294 {
 295         struct connman_technology *technology = user_data;
 296         DBusMessage *reply;
 297         DBusMessageIter array, dict;
 298         const char *str;
 299
 300         reply = dbus_message_new_method_return(message);
 301         if (reply == NULL)
 302                 return NULL;
 303
 304         dbus_message_iter_init_append(reply, &array);
 305
 306         connman_dbus_dict_open(&array, &dict);
 307
 308         str = state2string(technology->state);
 309         if (str != NULL)
 310                 connman_dbus_dict_append_basic(&dict, "State",
 311                                                 DBUS_TYPE_STRING, &str);
 312
 313         str = get_name(technology->type);
 314         if (str != NULL)
 315                 connman_dbus_dict_append_basic(&dict, "Name",
 316                                                 DBUS_TYPE_STRING, &str);
 317
 318         str = __connman_service_type2string(technology->type);
 319         if (str != NULL)
 320                 connman_dbus_dict_append_basic(&dict, "Type",
 321                                                 DBUS_TYPE_STRING, &str);
 322
 323         connman_dbus_dict_close(&array, &dict);
 324
 325         return reply;
 326 }
 327
 328 static GDBusMethodTable technology_methods[] = {
 329         { "GetProperties", "", "a{sv}", get_properties },
 330         { },
 331 };
 332
 333 static GDBusSignalTable technology_signals[] = {
 334         { "PropertyChanged", "sv" },
 335         { },
 336 };
 337
 338 static struct connman_technology *technology_find(enum connman_service_type type)
 339 {
 340         GSList *list;
 341
 342         DBG("type %d", type);
 343
 344         for (list = technology_list; list; list = list->next) {
 345                 struct connman_technology *technology = list->data;
 346
 347                 if (technology->type == type)
 348                         return technology;
 349         }
 350
 351         return NULL;
 352 }
 353
 354 static struct connman_technology *technology_get(enum connman_service_type type)
 355 {
 356         struct connman_technology *technology;
 357         const char *str;
 358         GSList *list;
 359
 360         DBG("type %d", type);
 361
 362         technology = technology_find(type);
 363         if (technology != NULL) {
 364                 g_atomic_int_inc(&technology->refcount);
 365                 goto done;
 366         }
 367
 368         str = __connman_service_type2string(type);
 369         if (str == NULL)
 370                 return NULL;
 371
 372         technology = g_try_new0(struct connman_technology, 1);
 373         if (technology == NULL)
 374                 return NULL;
 375
 376         technology->refcount = 1;
 377
 378         technology->type = type;
 379         technology->path = g_strdup_printf("%s/technology/%s",
 380                                                         CONNMAN_PATH, str);
 381
 382         technology->rfkill_list = g_hash_table_new_full(g_int_hash, g_int_equal,
 383                                                         NULL, free_rfkill);
 384         technology->device_list = NULL;
 385
 386         technology->state = CONNMAN_TECHNOLOGY_STATE_OFFLINE;
 387
 388         if (g_dbus_register_interface(connection, technology->path,
 389                                         CONNMAN_TECHNOLOGY_INTERFACE,
 390                                         technology_methods, technology_signals,
 391                                         NULL, technology, NULL) == FALSE) {
 392                 connman_error("Failed to register %s", technology->path);
 393                 g_free(technology);
 394                 return NULL;
 395         }
 396
 397         technology_list = g_slist_append(technology_list, technology);
 398
 399         technologies_changed();
 400
 401         if (technology->driver != NULL)
 402                 goto done;
 403
 404         for (list = driver_list; list; list = list->next) {
 405                 struct connman_technology_driver *driver = list->data;
 406
 407                 DBG("driver %p name %s", driver, driver->name);
 408
 409                 if (driver->type != technology->type)
 410                         continue;
 411
 412                 if (driver->probe(technology) == 0) {
 413                         technology->driver = driver;
 414                         break;
 415                 }
 416         }
 417
 418 done:
 419         DBG("technology %p", technology);
 420
 421         return technology;
 422 }
 423
 424 static void technology_put(struct connman_technology *technology)
 425 {
 426         DBG("technology %p", technology);
 427
 428         if (g_atomic_int_dec_and_test(&technology->refcount) == FALSE)
 429                 return;
 430
 431         if (technology->driver) {
 432                 technology->driver->remove(technology);
 433                 technology->driver = NULL;
 434         }
 435
 436         technology_list = g_slist_remove(technology_list, technology);
 437
 438         technologies_changed();
 439
 440         g_dbus_unregister_interface(connection, technology->path,
 441                                                 CONNMAN_TECHNOLOGY_INTERFACE);
 442
 443         g_slist_free(technology->device_list);
 444         g_hash_table_destroy(technology->rfkill_list);
 445
 446         g_free(technology->path);
 447         g_free(technology);
 448 }
 449
 450 static void unregister_technology(gpointer data)
 451 {
 452         struct connman_technology *technology = data;
 453
 454         technology_put(technology);
 455 }
 456
 457 int __connman_technology_add_device(struct connman_device *device)
 458 {
 459         struct connman_technology *technology;
 460         enum connman_service_type type;
 461
 462         DBG("device %p", device);
 463
 464         type = __connman_device_get_service_type(device);
 465         __connman_notifier_register(type);
 466
 467         technology = technology_get(type);
 468         if (technology == NULL)
 469                 return -ENXIO;
 470
 471         g_hash_table_insert(device_table, device, technology);
 472
 473         if (g_atomic_int_get(&technology->blocked))
 474                 goto done;
 475
 476         technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 477
 478         state_changed(technology);
 479
 480 done:
 481
 482         technology->device_list = g_slist_append(technology->device_list,
 483                                                                 device);
 484
 485         return 0;
 486 }
 487
 488 int __connman_technology_remove_device(struct connman_device *device)
 489 {
 490         struct connman_technology *technology;
 491         enum connman_service_type type;
 492
 493         DBG("device %p", device);
 494
 495         type = __connman_device_get_service_type(device);
 496         __connman_notifier_unregister(type);
 497
 498         technology = g_hash_table_lookup(device_table, device);
 499         if (technology == NULL)
 500                 return -ENXIO;
 501
 502         technology->device_list = g_slist_remove(technology->device_list,
 503                                                                 device);
 504         if (technology->device_list == NULL) {
 505                 technology->state = CONNMAN_TECHNOLOGY_STATE_OFFLINE;
 506                 state_changed(technology);
 507         }
 508
 509         g_hash_table_remove(device_table, device);
 510
 511         return 0;
 512 }
 513
 514 int __connman_technology_enable_device(struct connman_device *device)
 515 {
 516         struct connman_technology *technology;
 517         enum connman_service_type type;
 518
 519         DBG("device %p", device);
 520
 521         technology = g_hash_table_lookup(device_table, device);
 522         if (technology == NULL)
 523                 return -ENXIO;
 524
 525         if (g_atomic_int_get(&technology->blocked))
 526                 return -ERFKILL;
 527
 528         type = __connman_device_get_service_type(device);
 529         __connman_notifier_enable(type);
 530
 531         if (g_atomic_int_exchange_and_add(&technology->enabled, 1) == 0) {
 532                 technology->state = CONNMAN_TECHNOLOGY_STATE_ENABLED;
 533                 state_changed(technology);
 534         }
 535
 536         return 0;
 537 }
 538
 539 int __connman_technology_disable_device(struct connman_device *device)
 540 {
 541         struct connman_technology *technology;
 542         enum connman_service_type type;
 543         GSList *list;
 544
 545         DBG("device %p", device);
 546
 547         type = __connman_device_get_service_type(device);
 548         __connman_notifier_disable(type);
 549
 550         technology = g_hash_table_lookup(device_table, device);
 551         if (technology == NULL)
 552                 return -ENXIO;
 553
 554         if (g_atomic_int_dec_and_test(&technology->enabled) == TRUE) {
 555                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 556                 state_changed(technology);
 557         }
 558
 559         for (list = technology->device_list; list; list = list->next) {
 560                 struct connman_device *device = list->data;
 561
 562                 if (__connman_device_get_blocked(device) == FALSE)
 563                         return 0;
 564         }
 565
 566         technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 567         state_changed(technology);
 568
 569         return 0;
 570 }
 571
 572 static void technology_blocked(struct connman_technology *technology,
 573                                 connman_bool_t blocked)
 574 {
 575         GSList *list;
 576
 577         for (list = technology->device_list; list; list = list->next) {
 578                 struct connman_device *device = list->data;
 579
 580                 __connman_device_set_blocked(device, blocked);
 581         }
 582 }
 583
 584 int __connman_technology_add_rfkill(unsigned int index,
 585                                         enum connman_service_type type,
 586                                                 connman_bool_t softblock,
 587                                                 connman_bool_t hardblock)
 588 {
 589         struct connman_technology *technology;
 590         struct connman_rfkill *rfkill;
 591         connman_bool_t blocked;
 592
 593         DBG("index %u type %d soft %u hard %u", index, type,
 594                                                         softblock, hardblock);
 595
 596         technology = technology_get(type);
 597         if (technology == NULL)
 598                 return -ENXIO;
 599
 600         rfkill = g_try_new0(struct connman_rfkill, 1);
 601         if (rfkill == NULL)
 602                 return -ENOMEM;
 603
 604         rfkill->index = index;
 605         rfkill->type = type;
 606         rfkill->softblock = softblock;
 607         rfkill->hardblock = hardblock;
 608
 609         g_hash_table_replace(rfkill_table, &rfkill->index, technology);
 610
 611         g_hash_table_replace(technology->rfkill_list, &rfkill->index, rfkill);
 612
 613         blocked = (softblock || hardblock) ? TRUE : FALSE;
 614         if (blocked == FALSE)
 615                 return 0;
 616
 617         if (g_atomic_int_exchange_and_add(&technology->blocked, 1) == 0) {
 618                 technology_blocked(technology, TRUE);
 619
 620                 technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 621                 state_changed(technology);
 622         }
 623
 624         return 0;
 625 }
 626
 627 int __connman_technology_update_rfkill(unsigned int index,
 628                                                 connman_bool_t softblock,
 629                                                 connman_bool_t hardblock)
 630 {
 631         struct connman_technology *technology;
 632         struct connman_rfkill *rfkill;
 633         connman_bool_t blocked, old_blocked;
 634
 635         DBG("index %u soft %u hard %u", index, softblock, hardblock);
 636
 637         technology = g_hash_table_lookup(rfkill_table, &index);
 638         if (technology == NULL)
 639                 return -ENXIO;
 640
 641         rfkill = g_hash_table_lookup(technology->rfkill_list, &index);
 642         if (rfkill == NULL)
 643                 return -ENXIO;
 644
 645         old_blocked = (rfkill->softblock || rfkill->hardblock) ? TRUE : FALSE;
 646         blocked = (softblock || hardblock) ? TRUE : FALSE;
 647
 648         rfkill->softblock = softblock;
 649         rfkill->hardblock = hardblock;
 650
 651         if (blocked == old_blocked)
 652                 return 0;
 653
 654         if (blocked) {
 655                 guint n_blocked;
 656
 657                 n_blocked =
 658                         g_atomic_int_exchange_and_add(&technology->blocked, 1);
 659                 if (n_blocked != g_hash_table_size(technology->rfkill_list) - 1)
 660                         return 0;
 661
 662                 technology_blocked(technology, blocked);
 663                 technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 664                 state_changed(technology);
 665         } else {
 666                 if (g_atomic_int_dec_and_test(&technology->blocked) == FALSE)
 667                         return 0;
 668
 669                 technology_blocked(technology, blocked);
 670                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 671                 state_changed(technology);
 672         }
 673
 674         return 0;
 675 }
 676
 677 int __connman_technology_remove_rfkill(unsigned int index)
 678 {
 679         struct connman_technology *technology;
 680
 681         DBG("index %u", index);
 682
 683         technology = g_hash_table_lookup(rfkill_table, &index);
 684         if (technology == NULL)
 685                 return -ENXIO;
 686
 687         g_hash_table_remove(technology->rfkill_list, &index);
 688
 689         g_hash_table_remove(rfkill_table, &index);
 690
 691         if (g_atomic_int_dec_and_test(&technology->blocked) == TRUE) {
 692                 technology_blocked(technology, FALSE);
 693                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 694                 state_changed(technology);
 695         }
 696
 697         return 0;
 698 }
 699
 700 connman_bool_t __connman_technology_get_blocked(enum connman_service_type type)
 701 {
 702         struct connman_technology *technology;
 703
 704         technology = technology_get(type);
 705         if (technology == NULL)
 706                 return FALSE;
 707
 708         if (g_atomic_int_get(&technology->blocked))
 709                 return TRUE;
 710
 711         return FALSE;
 712 }
 713
 714 int __connman_technology_init(void)
 715 {
 716         DBG("");
 717
 718         connection = connman_dbus_get_connection();
 719
 720         rfkill_table = g_hash_table_new_full(g_int_hash, g_int_equal,
 721                                                 NULL, unregister_technology);
 722         device_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 723                                                 NULL, unregister_technology);
 724
 725         return 0;
 726 }
 727
 728 void __connman_technology_cleanup(void)
 729 {
 730         DBG("");
 731
 732         g_hash_table_destroy(device_table);
 733         g_hash_table_destroy(rfkill_table);
 734
 735         dbus_connection_unref(connection);
 736 }