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