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 void connman_technology_tethering_notify(struct connman_technology *technology,
 181                                                         connman_bool_t enabled)
 182 {
 183         DBG("technology %p enabled %u", technology, enabled);
 184
 185         if (enabled == TRUE)
 186                 __connman_tethering_set_enabled();
 187         else
 188                 __connman_tethering_set_disabled();
 189 }
 190
 191 static int set_tethering(const char *bridge, connman_bool_t enabled)
 192 {
 193         GSList *list;
 194
 195         for (list = technology_list; list; list = list->next) {
 196                 struct connman_technology *technology = list->data;
 197
 198                 if (technology->driver == NULL)
 199                         continue;
 200
 201                 if (technology->driver->set_tethering)
 202                         technology->driver->set_tethering(technology,
 203                                                         bridge, enabled);
 204         }
 205
 206         return 0;
 207 }
 208
 209 int __connman_technology_enable_tethering(const char *bridge)
 210 {
 211         return set_tethering(bridge, TRUE);
 212 }
 213
 214 int __connman_technology_disable_tethering(const char *bridge)
 215 {
 216         return set_tethering(bridge, FALSE);
 217 }
 218
 219 static void free_rfkill(gpointer data)
 220 {
 221         struct connman_rfkill *rfkill = data;
 222
 223         g_free(rfkill);
 224 }
 225
 226 void __connman_technology_list(DBusMessageIter *iter, void *user_data)
 227 {
 228         GSList *list;
 229
 230         for (list = technology_list; list; list = list->next) {
 231                 struct connman_technology *technology = list->data;
 232
 233                 if (technology->path == NULL)
 234                         continue;
 235
 236                 dbus_message_iter_append_basic(iter, DBUS_TYPE_OBJECT_PATH,
 237                                                         &technology->path);
 238         }
 239 }
 240
 241 static void technologies_changed(void)
 242 {
 243         connman_dbus_property_changed_array(CONNMAN_MANAGER_PATH,
 244                         CONNMAN_MANAGER_INTERFACE, "Technologies",
 245                         DBUS_TYPE_OBJECT_PATH, __connman_technology_list, NULL);
 246 }
 247
 248 static const char *state2string(enum connman_technology_state state)
 249 {
 250         switch (state) {
 251         case CONNMAN_TECHNOLOGY_STATE_UNKNOWN:
 252                 break;
 253         case CONNMAN_TECHNOLOGY_STATE_OFFLINE:
 254                 return "offline";
 255         case CONNMAN_TECHNOLOGY_STATE_AVAILABLE:
 256                 return "available";
 257         case CONNMAN_TECHNOLOGY_STATE_BLOCKED:
 258                 return "blocked";
 259         case CONNMAN_TECHNOLOGY_STATE_ENABLED:
 260                 return "enabled";
 261         case CONNMAN_TECHNOLOGY_STATE_CONNECTED:
 262                 return "connected";
 263         }
 264
 265         return NULL;
 266 }
 267
 268 static void state_changed(struct connman_technology *technology)
 269 {
 270         const char *str;
 271
 272         str = state2string(technology->state);
 273         if (str == NULL)
 274                 return;
 275
 276         connman_dbus_property_changed_basic(technology->path,
 277                                 CONNMAN_TECHNOLOGY_INTERFACE, "State",
 278                                                 DBUS_TYPE_STRING, &str);
 279 }
 280
 281 static const char *get_name(enum connman_service_type type)
 282 {
 283         switch (type) {
 284         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 285         case CONNMAN_SERVICE_TYPE_SYSTEM:
 286         case CONNMAN_SERVICE_TYPE_GPS:
 287         case CONNMAN_SERVICE_TYPE_VPN:
 288                 break;
 289         case CONNMAN_SERVICE_TYPE_ETHERNET:
 290                 return "Wired";
 291         case CONNMAN_SERVICE_TYPE_WIFI:
 292                 return "WiFi";
 293         case CONNMAN_SERVICE_TYPE_WIMAX:
 294                 return "WiMAX";
 295         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 296                 return "Bluetooth";
 297         case CONNMAN_SERVICE_TYPE_CELLULAR:
 298                 return "3G";
 299         }
 300
 301         return NULL;
 302 }
 303
 304 static DBusMessage *get_properties(DBusConnection *conn,
 305                                         DBusMessage *message, void *user_data)
 306 {
 307         struct connman_technology *technology = user_data;
 308         DBusMessage *reply;
 309         DBusMessageIter array, dict;
 310         const char *str;
 311
 312         reply = dbus_message_new_method_return(message);
 313         if (reply == NULL)
 314                 return NULL;
 315
 316         dbus_message_iter_init_append(reply, &array);
 317
 318         connman_dbus_dict_open(&array, &dict);
 319
 320         str = state2string(technology->state);
 321         if (str != NULL)
 322                 connman_dbus_dict_append_basic(&dict, "State",
 323                                                 DBUS_TYPE_STRING, &str);
 324
 325         str = get_name(technology->type);
 326         if (str != NULL)
 327                 connman_dbus_dict_append_basic(&dict, "Name",
 328                                                 DBUS_TYPE_STRING, &str);
 329
 330         str = __connman_service_type2string(technology->type);
 331         if (str != NULL)
 332                 connman_dbus_dict_append_basic(&dict, "Type",
 333                                                 DBUS_TYPE_STRING, &str);
 334
 335         connman_dbus_dict_close(&array, &dict);
 336
 337         return reply;
 338 }
 339
 340 static GDBusMethodTable technology_methods[] = {
 341         { "GetProperties", "", "a{sv}", get_properties },
 342         { },
 343 };
 344
 345 static GDBusSignalTable technology_signals[] = {
 346         { "PropertyChanged", "sv" },
 347         { },
 348 };
 349
 350 static struct connman_technology *technology_find(enum connman_service_type type)
 351 {
 352         GSList *list;
 353
 354         DBG("type %d", type);
 355
 356         for (list = technology_list; list; list = list->next) {
 357                 struct connman_technology *technology = list->data;
 358
 359                 if (technology->type == type)
 360                         return technology;
 361         }
 362
 363         return NULL;
 364 }
 365
 366 static struct connman_technology *technology_get(enum connman_service_type type)
 367 {
 368         struct connman_technology *technology;
 369         const char *str;
 370         GSList *list;
 371
 372         DBG("type %d", type);
 373
 374         technology = technology_find(type);
 375         if (technology != NULL) {
 376                 g_atomic_int_inc(&technology->refcount);
 377                 goto done;
 378         }
 379
 380         str = __connman_service_type2string(type);
 381         if (str == NULL)
 382                 return NULL;
 383
 384         technology = g_try_new0(struct connman_technology, 1);
 385         if (technology == NULL)
 386                 return NULL;
 387
 388         technology->refcount = 1;
 389
 390         technology->type = type;
 391         technology->path = g_strdup_printf("%s/technology/%s",
 392                                                         CONNMAN_PATH, str);
 393
 394         technology->rfkill_list = g_hash_table_new_full(g_int_hash, g_int_equal,
 395                                                         NULL, free_rfkill);
 396         technology->device_list = NULL;
 397
 398         technology->state = CONNMAN_TECHNOLOGY_STATE_OFFLINE;
 399
 400         if (g_dbus_register_interface(connection, technology->path,
 401                                         CONNMAN_TECHNOLOGY_INTERFACE,
 402                                         technology_methods, technology_signals,
 403                                         NULL, technology, NULL) == FALSE) {
 404                 connman_error("Failed to register %s", technology->path);
 405                 g_free(technology);
 406                 return NULL;
 407         }
 408
 409         technology_list = g_slist_append(technology_list, technology);
 410
 411         technologies_changed();
 412
 413         if (technology->driver != NULL)
 414                 goto done;
 415
 416         for (list = driver_list; list; list = list->next) {
 417                 struct connman_technology_driver *driver = list->data;
 418
 419                 DBG("driver %p name %s", driver, driver->name);
 420
 421                 if (driver->type != technology->type)
 422                         continue;
 423
 424                 if (driver->probe(technology) == 0) {
 425                         technology->driver = driver;
 426                         break;
 427                 }
 428         }
 429
 430 done:
 431         DBG("technology %p", technology);
 432
 433         return technology;
 434 }
 435
 436 static void technology_put(struct connman_technology *technology)
 437 {
 438         DBG("technology %p", technology);
 439
 440         if (g_atomic_int_dec_and_test(&technology->refcount) == FALSE)
 441                 return;
 442
 443         if (technology->driver) {
 444                 technology->driver->remove(technology);
 445                 technology->driver = NULL;
 446         }
 447
 448         technology_list = g_slist_remove(technology_list, technology);
 449
 450         technologies_changed();
 451
 452         g_dbus_unregister_interface(connection, technology->path,
 453                                                 CONNMAN_TECHNOLOGY_INTERFACE);
 454
 455         g_slist_free(technology->device_list);
 456         g_hash_table_destroy(technology->rfkill_list);
 457
 458         g_free(technology->path);
 459         g_free(technology);
 460 }
 461
 462 static void unregister_technology(gpointer data)
 463 {
 464         struct connman_technology *technology = data;
 465
 466         technology_put(technology);
 467 }
 468
 469 int __connman_technology_add_device(struct connman_device *device)
 470 {
 471         struct connman_technology *technology;
 472         enum connman_service_type type;
 473
 474         DBG("device %p", device);
 475
 476         type = __connman_device_get_service_type(device);
 477         __connman_notifier_register(type);
 478
 479         technology = technology_get(type);
 480         if (technology == NULL)
 481                 return -ENXIO;
 482
 483         g_hash_table_insert(device_table, device, technology);
 484
 485         if (g_atomic_int_get(&technology->blocked))
 486                 goto done;
 487
 488         technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 489
 490         state_changed(technology);
 491
 492 done:
 493
 494         technology->device_list = g_slist_append(technology->device_list,
 495                                                                 device);
 496
 497         return 0;
 498 }
 499
 500 int __connman_technology_remove_device(struct connman_device *device)
 501 {
 502         struct connman_technology *technology;
 503         enum connman_service_type type;
 504
 505         DBG("device %p", device);
 506
 507         type = __connman_device_get_service_type(device);
 508         __connman_notifier_unregister(type);
 509
 510         technology = g_hash_table_lookup(device_table, device);
 511         if (technology == NULL)
 512                 return -ENXIO;
 513
 514         technology->device_list = g_slist_remove(technology->device_list,
 515                                                                 device);
 516         if (technology->device_list == NULL) {
 517                 technology->state = CONNMAN_TECHNOLOGY_STATE_OFFLINE;
 518                 state_changed(technology);
 519         }
 520
 521         g_hash_table_remove(device_table, device);
 522
 523         return 0;
 524 }
 525
 526 int __connman_technology_enable_device(struct connman_device *device)
 527 {
 528         struct connman_technology *technology;
 529         enum connman_service_type type;
 530
 531         DBG("device %p", device);
 532
 533         technology = g_hash_table_lookup(device_table, device);
 534         if (technology == NULL)
 535                 return -ENXIO;
 536
 537         if (g_atomic_int_get(&technology->blocked))
 538                 return -ERFKILL;
 539
 540         type = __connman_device_get_service_type(device);
 541         __connman_notifier_enable(type);
 542
 543         if (g_atomic_int_exchange_and_add(&technology->enabled, 1) == 0) {
 544                 technology->state = CONNMAN_TECHNOLOGY_STATE_ENABLED;
 545                 state_changed(technology);
 546         }
 547
 548         return 0;
 549 }
 550
 551 int __connman_technology_disable_device(struct connman_device *device)
 552 {
 553         struct connman_technology *technology;
 554         enum connman_service_type type;
 555         GSList *list;
 556
 557         DBG("device %p", device);
 558
 559         type = __connman_device_get_service_type(device);
 560         __connman_notifier_disable(type);
 561
 562         technology = g_hash_table_lookup(device_table, device);
 563         if (technology == NULL)
 564                 return -ENXIO;
 565
 566         if (g_atomic_int_dec_and_test(&technology->enabled) == TRUE) {
 567                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 568                 state_changed(technology);
 569         }
 570
 571         for (list = technology->device_list; list; list = list->next) {
 572                 struct connman_device *device = list->data;
 573
 574                 if (__connman_device_get_blocked(device) == FALSE)
 575                         return 0;
 576         }
 577
 578         technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 579         state_changed(technology);
 580
 581         return 0;
 582 }
 583
 584 static void technology_blocked(struct connman_technology *technology,
 585                                 connman_bool_t blocked)
 586 {
 587         GSList *list;
 588
 589         for (list = technology->device_list; list; list = list->next) {
 590                 struct connman_device *device = list->data;
 591
 592                 __connman_device_set_blocked(device, blocked);
 593         }
 594 }
 595
 596 int __connman_technology_add_rfkill(unsigned int index,
 597                                         enum connman_service_type type,
 598                                                 connman_bool_t softblock,
 599                                                 connman_bool_t hardblock)
 600 {
 601         struct connman_technology *technology;
 602         struct connman_rfkill *rfkill;
 603         connman_bool_t blocked;
 604
 605         DBG("index %u type %d soft %u hard %u", index, type,
 606                                                         softblock, hardblock);
 607
 608         technology = technology_get(type);
 609         if (technology == NULL)
 610                 return -ENXIO;
 611
 612         rfkill = g_try_new0(struct connman_rfkill, 1);
 613         if (rfkill == NULL)
 614                 return -ENOMEM;
 615
 616         rfkill->index = index;
 617         rfkill->type = type;
 618         rfkill->softblock = softblock;
 619         rfkill->hardblock = hardblock;
 620
 621         g_hash_table_replace(rfkill_table, &rfkill->index, technology);
 622
 623         g_hash_table_replace(technology->rfkill_list, &rfkill->index, rfkill);
 624
 625         blocked = (softblock || hardblock) ? TRUE : FALSE;
 626         if (blocked == FALSE)
 627                 return 0;
 628
 629         if (g_atomic_int_exchange_and_add(&technology->blocked, 1) == 0) {
 630                 technology_blocked(technology, TRUE);
 631
 632                 technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 633                 state_changed(technology);
 634         }
 635
 636         return 0;
 637 }
 638
 639 int __connman_technology_update_rfkill(unsigned int index,
 640                                                 connman_bool_t softblock,
 641                                                 connman_bool_t hardblock)
 642 {
 643         struct connman_technology *technology;
 644         struct connman_rfkill *rfkill;
 645         connman_bool_t blocked, old_blocked;
 646
 647         DBG("index %u soft %u hard %u", index, softblock, hardblock);
 648
 649         technology = g_hash_table_lookup(rfkill_table, &index);
 650         if (technology == NULL)
 651                 return -ENXIO;
 652
 653         rfkill = g_hash_table_lookup(technology->rfkill_list, &index);
 654         if (rfkill == NULL)
 655                 return -ENXIO;
 656
 657         old_blocked = (rfkill->softblock || rfkill->hardblock) ? TRUE : FALSE;
 658         blocked = (softblock || hardblock) ? TRUE : FALSE;
 659
 660         rfkill->softblock = softblock;
 661         rfkill->hardblock = hardblock;
 662
 663         if (blocked == old_blocked)
 664                 return 0;
 665
 666         if (blocked) {
 667                 guint n_blocked;
 668
 669                 n_blocked =
 670                         g_atomic_int_exchange_and_add(&technology->blocked, 1);
 671                 if (n_blocked != g_hash_table_size(technology->rfkill_list) - 1)
 672                         return 0;
 673
 674                 technology_blocked(technology, blocked);
 675                 technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 676                 state_changed(technology);
 677         } else {
 678                 if (g_atomic_int_dec_and_test(&technology->blocked) == FALSE)
 679                         return 0;
 680
 681                 technology_blocked(technology, blocked);
 682                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 683                 state_changed(technology);
 684         }
 685
 686         return 0;
 687 }
 688
 689 int __connman_technology_remove_rfkill(unsigned int index)
 690 {
 691         struct connman_technology *technology;
 692
 693         DBG("index %u", index);
 694
 695         technology = g_hash_table_lookup(rfkill_table, &index);
 696         if (technology == NULL)
 697                 return -ENXIO;
 698
 699         g_hash_table_remove(technology->rfkill_list, &index);
 700
 701         g_hash_table_remove(rfkill_table, &index);
 702
 703         if (g_atomic_int_dec_and_test(&technology->blocked) == TRUE) {
 704                 technology_blocked(technology, FALSE);
 705                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 706                 state_changed(technology);
 707         }
 708
 709         return 0;
 710 }
 711
 712 connman_bool_t __connman_technology_get_blocked(enum connman_service_type type)
 713 {
 714         struct connman_technology *technology;
 715
 716         technology = technology_get(type);
 717         if (technology == NULL)
 718                 return FALSE;
 719
 720         if (g_atomic_int_get(&technology->blocked))
 721                 return TRUE;
 722
 723         return FALSE;
 724 }
 725
 726 int __connman_technology_init(void)
 727 {
 728         DBG("");
 729
 730         connection = connman_dbus_get_connection();
 731
 732         rfkill_table = g_hash_table_new_full(g_int_hash, g_int_equal,
 733                                                 NULL, unregister_technology);
 734         device_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 735                                                 NULL, unregister_technology);
 736
 737         return 0;
 738 }
 739
 740 void __connman_technology_cleanup(void)
 741 {
 742         DBG("");
 743
 744         g_hash_table_destroy(device_table);
 745         g_hash_table_destroy(rfkill_table);
 746
 747         dbus_connection_unref(connection);
 748 }