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(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, enabled);
 192         }
 193
 194         return 0;
 195 }
 196
 197 int __connman_technology_enable_tethering(void)
 198 {
 199         return set_tethering(TRUE);
 200 }
 201
 202 int __connman_technology_disable_tethering(void)
 203 {
 204         return set_tethering(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 void device_list(DBusMessageIter *iter, void *user_data)
 237 {
 238         struct connman_technology *technology = user_data;
 239         GSList *list;
 240
 241         for (list = technology->device_list; list; list = list->next) {
 242                 struct connman_device *device = list->data;
 243                 const char *path;
 244
 245                 path = connman_device_get_path(device);
 246                 if (path == NULL)
 247                         continue;
 248
 249                 dbus_message_iter_append_basic(iter, DBUS_TYPE_OBJECT_PATH,
 250                                                                         &path);
 251         }
 252 }
 253
 254 static void devices_changed(struct connman_technology *technology)
 255 {
 256         connman_dbus_property_changed_array(technology->path,
 257                         CONNMAN_TECHNOLOGY_INTERFACE, "Devices",
 258                         DBUS_TYPE_OBJECT_PATH, device_list, technology);
 259 }
 260
 261 static const char *state2string(enum connman_technology_state state)
 262 {
 263         switch (state) {
 264         case CONNMAN_TECHNOLOGY_STATE_UNKNOWN:
 265                 break;
 266         case CONNMAN_TECHNOLOGY_STATE_OFFLINE:
 267                 return "offline";
 268         case CONNMAN_TECHNOLOGY_STATE_AVAILABLE:
 269                 return "available";
 270         case CONNMAN_TECHNOLOGY_STATE_BLOCKED:
 271                 return "blocked";
 272         case CONNMAN_TECHNOLOGY_STATE_ENABLED:
 273                 return "enabled";
 274         case CONNMAN_TECHNOLOGY_STATE_CONNECTED:
 275                 return "connected";
 276         }
 277
 278         return NULL;
 279 }
 280
 281 static void state_changed(struct connman_technology *technology)
 282 {
 283         const char *str;
 284
 285         str = state2string(technology->state);
 286         if (str == NULL)
 287                 return;
 288
 289         connman_dbus_property_changed_basic(technology->path,
 290                                 CONNMAN_TECHNOLOGY_INTERFACE, "State",
 291                                                 DBUS_TYPE_STRING, &str);
 292 }
 293
 294 static const char *get_name(enum connman_service_type type)
 295 {
 296         switch (type) {
 297         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 298         case CONNMAN_SERVICE_TYPE_SYSTEM:
 299         case CONNMAN_SERVICE_TYPE_GPS:
 300         case CONNMAN_SERVICE_TYPE_VPN:
 301                 break;
 302         case CONNMAN_SERVICE_TYPE_ETHERNET:
 303                 return "Wired";
 304         case CONNMAN_SERVICE_TYPE_WIFI:
 305                 return "WiFi";
 306         case CONNMAN_SERVICE_TYPE_WIMAX:
 307                 return "WiMAX";
 308         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 309                 return "Bluetooth";
 310         case CONNMAN_SERVICE_TYPE_CELLULAR:
 311                 return "3G";
 312         }
 313
 314         return NULL;
 315 }
 316
 317 static DBusMessage *get_properties(DBusConnection *conn,
 318                                         DBusMessage *message, void *user_data)
 319 {
 320         struct connman_technology *technology = user_data;
 321         DBusMessage *reply;
 322         DBusMessageIter array, dict;
 323         const char *str;
 324
 325         reply = dbus_message_new_method_return(message);
 326         if (reply == NULL)
 327                 return NULL;
 328
 329         dbus_message_iter_init_append(reply, &array);
 330
 331         connman_dbus_dict_open(&array, &dict);
 332
 333         str = state2string(technology->state);
 334         if (str != NULL)
 335                 connman_dbus_dict_append_basic(&dict, "State",
 336                                                 DBUS_TYPE_STRING, &str);
 337
 338         str = get_name(technology->type);
 339         if (str != NULL)
 340                 connman_dbus_dict_append_basic(&dict, "Name",
 341                                                 DBUS_TYPE_STRING, &str);
 342
 343         str = __connman_service_type2string(technology->type);
 344         if (str != NULL)
 345                 connman_dbus_dict_append_basic(&dict, "Type",
 346                                                 DBUS_TYPE_STRING, &str);
 347
 348         connman_dbus_dict_append_array(&dict, "Devices",
 349                         DBUS_TYPE_OBJECT_PATH, device_list, technology);
 350
 351         connman_dbus_dict_close(&array, &dict);
 352
 353         return reply;
 354 }
 355
 356 static GDBusMethodTable technology_methods[] = {
 357         { "GetProperties", "", "a{sv}", get_properties },
 358         { },
 359 };
 360
 361 static GDBusSignalTable technology_signals[] = {
 362         { "PropertyChanged", "sv" },
 363         { },
 364 };
 365
 366 static struct connman_technology *technology_find(enum connman_service_type type)
 367 {
 368         GSList *list;
 369
 370         DBG("type %d", type);
 371
 372         for (list = technology_list; list; list = list->next) {
 373                 struct connman_technology *technology = list->data;
 374
 375                 if (technology->type == type)
 376                         return technology;
 377         }
 378
 379         return NULL;
 380 }
 381
 382 static struct connman_technology *technology_get(enum connman_service_type type)
 383 {
 384         struct connman_technology *technology;
 385         const char *str;
 386         GSList *list;
 387
 388         DBG("type %d", type);
 389
 390         technology = technology_find(type);
 391         if (technology != NULL) {
 392                 g_atomic_int_inc(&technology->refcount);
 393                 goto done;
 394         }
 395
 396         str = __connman_service_type2string(type);
 397         if (str == NULL)
 398                 return NULL;
 399
 400         technology = g_try_new0(struct connman_technology, 1);
 401         if (technology == NULL)
 402                 return NULL;
 403
 404         technology->refcount = 1;
 405
 406         technology->type = type;
 407         technology->path = g_strdup_printf("%s/technology/%s",
 408                                                         CONNMAN_PATH, str);
 409
 410         technology->rfkill_list = g_hash_table_new_full(g_int_hash, g_int_equal,
 411                                                         NULL, free_rfkill);
 412         technology->device_list = NULL;
 413
 414         technology->state = CONNMAN_TECHNOLOGY_STATE_OFFLINE;
 415
 416         if (g_dbus_register_interface(connection, technology->path,
 417                                         CONNMAN_TECHNOLOGY_INTERFACE,
 418                                         technology_methods, technology_signals,
 419                                         NULL, technology, NULL) == FALSE) {
 420                 connman_error("Failed to register %s", technology->path);
 421                 g_free(technology);
 422                 return NULL;
 423         }
 424
 425         technology_list = g_slist_append(technology_list, technology);
 426
 427         technologies_changed();
 428
 429         if (technology->driver != NULL)
 430                 goto done;
 431
 432         for (list = driver_list; list; list = list->next) {
 433                 struct connman_technology_driver *driver = list->data;
 434
 435                 DBG("driver %p name %s", driver, driver->name);
 436
 437                 if (driver->type != technology->type)
 438                         continue;
 439
 440                 if (driver->probe(technology) == 0) {
 441                         technology->driver = driver;
 442                         break;
 443                 }
 444         }
 445
 446 done:
 447         DBG("technology %p", technology);
 448
 449         return technology;
 450 }
 451
 452 static void technology_put(struct connman_technology *technology)
 453 {
 454         DBG("technology %p", technology);
 455
 456         if (g_atomic_int_dec_and_test(&technology->refcount) == FALSE)
 457                 return;
 458
 459         if (technology->driver) {
 460                 technology->driver->remove(technology);
 461                 technology->driver = NULL;
 462         }
 463
 464         technology_list = g_slist_remove(technology_list, technology);
 465
 466         technologies_changed();
 467
 468         g_dbus_unregister_interface(connection, technology->path,
 469                                                 CONNMAN_TECHNOLOGY_INTERFACE);
 470
 471         g_slist_free(technology->device_list);
 472         g_hash_table_destroy(technology->rfkill_list);
 473
 474         g_free(technology->path);
 475         g_free(technology);
 476 }
 477
 478 static void unregister_technology(gpointer data)
 479 {
 480         struct connman_technology *technology = data;
 481
 482         technology_put(technology);
 483 }
 484
 485 int __connman_technology_add_device(struct connman_device *device)
 486 {
 487         struct connman_technology *technology;
 488         enum connman_service_type type;
 489
 490         DBG("device %p", device);
 491
 492         type = __connman_device_get_service_type(device);
 493         __connman_notifier_register(type);
 494
 495         technology = technology_get(type);
 496         if (technology == NULL)
 497                 return -ENXIO;
 498
 499         g_hash_table_insert(device_table, device, technology);
 500
 501         if (g_atomic_int_get(&technology->blocked))
 502                 goto done;
 503
 504         technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 505
 506         state_changed(technology);
 507
 508 done:
 509
 510         technology->device_list = g_slist_append(technology->device_list,
 511                                                                 device);
 512         devices_changed(technology);
 513
 514         return 0;
 515 }
 516
 517 int __connman_technology_remove_device(struct connman_device *device)
 518 {
 519         struct connman_technology *technology;
 520         enum connman_service_type type;
 521
 522         DBG("device %p", device);
 523
 524         type = __connman_device_get_service_type(device);
 525         __connman_notifier_unregister(type);
 526
 527         technology = g_hash_table_lookup(device_table, device);
 528         if (technology == NULL)
 529                 return -ENXIO;
 530
 531         technology->device_list = g_slist_remove(technology->device_list,
 532                                                                 device);
 533         devices_changed(technology);
 534
 535         if (technology->device_list == NULL) {
 536                 technology->state = CONNMAN_TECHNOLOGY_STATE_OFFLINE;
 537                 state_changed(technology);
 538         }
 539
 540         g_hash_table_remove(device_table, device);
 541
 542         return 0;
 543 }
 544
 545 int __connman_technology_enable_device(struct connman_device *device)
 546 {
 547         struct connman_technology *technology;
 548         enum connman_service_type type;
 549
 550         DBG("device %p", device);
 551
 552         technology = g_hash_table_lookup(device_table, device);
 553         if (technology == NULL)
 554                 return -ENXIO;
 555
 556         if (g_atomic_int_get(&technology->blocked))
 557                 return -ERFKILL;
 558
 559         type = __connman_device_get_service_type(device);
 560         __connman_notifier_enable(type);
 561
 562         if (g_atomic_int_exchange_and_add(&technology->enabled, 1) == 0) {
 563                 technology->state = CONNMAN_TECHNOLOGY_STATE_ENABLED;
 564                 state_changed(technology);
 565         }
 566
 567         return 0;
 568 }
 569
 570 int __connman_technology_disable_device(struct connman_device *device)
 571 {
 572         struct connman_technology *technology;
 573         enum connman_service_type type;
 574         GSList *list;
 575
 576         DBG("device %p", device);
 577
 578         type = __connman_device_get_service_type(device);
 579         __connman_notifier_disable(type);
 580
 581         technology = g_hash_table_lookup(device_table, device);
 582         if (technology == NULL)
 583                 return -ENXIO;
 584
 585         if (g_atomic_int_dec_and_test(&technology->enabled) == TRUE) {
 586                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 587                 state_changed(technology);
 588         }
 589
 590         for (list = technology->device_list; list; list = list->next) {
 591                 struct connman_device *device = list->data;
 592
 593                 if (__connman_device_get_blocked(device) == FALSE)
 594                         return 0;
 595         }
 596
 597         technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 598         state_changed(technology);
 599
 600         return 0;
 601 }
 602
 603 static void technology_blocked(struct connman_technology *technology,
 604                                 connman_bool_t blocked)
 605 {
 606         GSList *list;
 607
 608         for (list = technology->device_list; list; list = list->next) {
 609                 struct connman_device *device = list->data;
 610
 611                 __connman_device_set_blocked(device, blocked);
 612         }
 613 }
 614
 615 int __connman_technology_add_rfkill(unsigned int index,
 616                                         enum connman_service_type type,
 617                                                 connman_bool_t softblock,
 618                                                 connman_bool_t hardblock)
 619 {
 620         struct connman_technology *technology;
 621         struct connman_rfkill *rfkill;
 622         connman_bool_t blocked;
 623
 624         DBG("index %u type %d soft %u hard %u", index, type,
 625                                                         softblock, hardblock);
 626
 627         technology = technology_get(type);
 628         if (technology == NULL)
 629                 return -ENXIO;
 630
 631         rfkill = g_try_new0(struct connman_rfkill, 1);
 632         if (rfkill == NULL)
 633                 return -ENOMEM;
 634
 635         rfkill->index = index;
 636         rfkill->type = type;
 637         rfkill->softblock = softblock;
 638         rfkill->hardblock = hardblock;
 639
 640         g_hash_table_replace(rfkill_table, &rfkill->index, technology);
 641
 642         g_hash_table_replace(technology->rfkill_list, &rfkill->index, rfkill);
 643
 644         blocked = (softblock || hardblock) ? TRUE : FALSE;
 645         if (blocked == FALSE)
 646                 return 0;
 647
 648         if (g_atomic_int_exchange_and_add(&technology->blocked, 1) == 0) {
 649                 technology_blocked(technology, TRUE);
 650
 651                 technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 652                 state_changed(technology);
 653         }
 654
 655         return 0;
 656 }
 657
 658 int __connman_technology_update_rfkill(unsigned int index,
 659                                                 connman_bool_t softblock,
 660                                                 connman_bool_t hardblock)
 661 {
 662         struct connman_technology *technology;
 663         struct connman_rfkill *rfkill;
 664         connman_bool_t blocked, old_blocked;
 665
 666         DBG("index %u soft %u hard %u", index, softblock, hardblock);
 667
 668         technology = g_hash_table_lookup(rfkill_table, &index);
 669         if (technology == NULL)
 670                 return -ENXIO;
 671
 672         rfkill = g_hash_table_lookup(technology->rfkill_list, &index);
 673         if (rfkill == NULL)
 674                 return -ENXIO;
 675
 676         old_blocked = (rfkill->softblock || rfkill->hardblock) ? TRUE : FALSE;
 677         blocked = (softblock || hardblock) ? TRUE : FALSE;
 678
 679         rfkill->softblock = softblock;
 680         rfkill->hardblock = hardblock;
 681
 682         if (blocked == old_blocked)
 683                 return 0;
 684
 685         if (blocked) {
 686                 guint n_blocked;
 687
 688                 n_blocked =
 689                         g_atomic_int_exchange_and_add(&technology->blocked, 1);
 690                 if (n_blocked != g_hash_table_size(technology->rfkill_list) - 1)
 691                         return 0;
 692
 693                 technology_blocked(technology, blocked);
 694                 technology->state = CONNMAN_TECHNOLOGY_STATE_BLOCKED;
 695                 state_changed(technology);
 696         } else {
 697                 if (g_atomic_int_dec_and_test(&technology->blocked) == FALSE)
 698                         return 0;
 699
 700                 technology_blocked(technology, blocked);
 701                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 702                 state_changed(technology);
 703         }
 704
 705         return 0;
 706 }
 707
 708 int __connman_technology_remove_rfkill(unsigned int index)
 709 {
 710         struct connman_technology *technology;
 711
 712         DBG("index %u", index);
 713
 714         technology = g_hash_table_lookup(rfkill_table, &index);
 715         if (technology == NULL)
 716                 return -ENXIO;
 717
 718         g_hash_table_remove(technology->rfkill_list, &index);
 719
 720         g_hash_table_remove(rfkill_table, &index);
 721
 722         if (g_atomic_int_dec_and_test(&technology->blocked) == TRUE) {
 723                 technology_blocked(technology, FALSE);
 724                 technology->state = CONNMAN_TECHNOLOGY_STATE_AVAILABLE;
 725                 state_changed(technology);
 726         }
 727
 728         return 0;
 729 }
 730
 731 int __connman_technology_init(void)
 732 {
 733         DBG("");
 734
 735         connection = connman_dbus_get_connection();
 736
 737         rfkill_table = g_hash_table_new_full(g_int_hash, g_int_equal,
 738                                                 NULL, unregister_technology);
 739         device_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 740                                                 NULL, unregister_technology);
 741
 742         return 0;
 743 }
 744
 745 void __connman_technology_cleanup(void)
 746 {
 747         DBG("");
 748
 749         g_hash_table_destroy(device_table);
 750         g_hash_table_destroy(rfkill_table);
 751
 752         dbus_connection_unref(connection);
 753 }