src/provider.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2012  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 <errno.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <gdbus.h>
  31 #include <gweb/gresolv.h>
  32
  33 #include "connman.h"
  34
  35 static DBusConnection *connection = NULL;
  36
  37 static GHashTable *provider_hash = NULL;
  38
  39 static GSList *driver_list = NULL;
  40
  41 struct connman_provider {
  42         int refcount;
  43         struct connman_service *vpn_service;
  44         int index;
  45         char *identifier;
  46         int family;
  47         struct connman_provider_driver *driver;
  48         void *driver_data;
  49 };
  50
  51 void __connman_provider_append_properties(struct connman_provider *provider,
  52                                                         DBusMessageIter *iter)
  53 {
  54         const char *host, *domain, *type;
  55
  56         if (provider->driver == NULL || provider->driver->get_property == NULL)
  57                 return;
  58
  59         host = provider->driver->get_property(provider, "Host");
  60         domain = provider->driver->get_property(provider, "Domain");
  61         type = provider->driver->get_property(provider, "Type");
  62
  63         if (host != NULL)
  64                 connman_dbus_dict_append_basic(iter, "Host",
  65                                         DBUS_TYPE_STRING, &host);
  66
  67         if (domain != NULL)
  68                 connman_dbus_dict_append_basic(iter, "Domain",
  69                                         DBUS_TYPE_STRING, &domain);
  70
  71         if (type != NULL)
  72                 connman_dbus_dict_append_basic(iter, "Type", DBUS_TYPE_STRING,
  73                                                  &type);
  74 }
  75
  76 struct connman_provider *
  77 connman_provider_ref_debug(struct connman_provider *provider,
  78                         const char *file, int line, const char *caller)
  79 {
  80         DBG("%p ref %d by %s:%d:%s()", provider, provider->refcount + 1,
  81                 file, line, caller);
  82
  83         __sync_fetch_and_add(&provider->refcount, 1);
  84
  85         return provider;
  86 }
  87
  88 static void provider_remove(struct connman_provider *provider)
  89 {
  90         if (provider->driver != NULL) {
  91                 provider->driver->remove(provider);
  92                 provider->driver = NULL;
  93         }
  94 }
  95
  96 static void provider_destruct(struct connman_provider *provider)
  97 {
  98         DBG("provider %p", provider);
  99
 100         g_free(provider->identifier);
 101         g_free(provider);
 102 }
 103
 104 void connman_provider_unref_debug(struct connman_provider *provider,
 105                                 const char *file, int line, const char *caller)
 106 {
 107         DBG("%p ref %d by %s:%d:%s()", provider, provider->refcount - 1,
 108                 file, line, caller);
 109
 110         if (__sync_fetch_and_sub(&provider->refcount, 1) != 1)
 111                 return;
 112
 113         provider_destruct(provider);
 114 }
 115
 116 static int provider_indicate_state(struct connman_provider *provider,
 117                                         enum connman_service_state state)
 118 {
 119         DBG("state %d", state);
 120
 121         __connman_service_ipconfig_indicate_state(provider->vpn_service, state,
 122                                         CONNMAN_IPCONFIG_TYPE_IPV4);
 123
 124         return __connman_service_ipconfig_indicate_state(provider->vpn_service,
 125                                         state, CONNMAN_IPCONFIG_TYPE_IPV6);
 126 }
 127
 128 int connman_provider_disconnect(struct connman_provider *provider)
 129 {
 130         int err;
 131
 132         DBG("provider %p", provider);
 133
 134         if (provider->driver != NULL && provider->driver->disconnect != NULL)
 135                 err = provider->driver->disconnect(provider);
 136         else
 137                 return -EOPNOTSUPP;
 138
 139         if (provider->vpn_service != NULL)
 140                 provider_indicate_state(provider,
 141                                         CONNMAN_SERVICE_STATE_DISCONNECT);
 142
 143         if (err < 0) {
 144                 if (err != -EINPROGRESS)
 145                         return err;
 146
 147                 return -EINPROGRESS;
 148         }
 149
 150         return 0;
 151 }
 152
 153 int __connman_provider_connect(struct connman_provider *provider)
 154 {
 155         int err;
 156
 157         DBG("provider %p", provider);
 158
 159         if (provider->driver != NULL && provider->driver->connect != NULL) {
 160                 err = provider->driver->connect(provider);
 161         } else
 162                 return -EOPNOTSUPP;
 163
 164         if (err < 0) {
 165                 if (err != -EINPROGRESS)
 166                         return err;
 167
 168                 provider_indicate_state(provider,
 169                                         CONNMAN_SERVICE_STATE_ASSOCIATION);
 170
 171                 return -EINPROGRESS;
 172         }
 173
 174         return 0;
 175 }
 176
 177 int __connman_provider_remove_by_path(const char *path)
 178 {
 179         struct connman_provider *provider;
 180         GHashTableIter iter;
 181         gpointer value, key;
 182
 183         DBG("path %s", path);
 184
 185         g_hash_table_iter_init(&iter, provider_hash);
 186         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 187                 const char *srv_path;
 188                 provider = value;
 189
 190                 if (provider->vpn_service == NULL)
 191                         continue;
 192
 193                 srv_path = __connman_service_get_path(provider->vpn_service);
 194
 195                 if (g_strcmp0(srv_path, path) == 0) {
 196                         DBG("Removing VPN %s", provider->identifier);
 197
 198                         provider_remove(provider);
 199
 200                         connman_provider_set_state(provider,
 201                                                 CONNMAN_PROVIDER_STATE_IDLE);
 202
 203                         g_hash_table_remove(provider_hash,
 204                                                 provider->identifier);
 205                         return 0;
 206                 }
 207         }
 208
 209         return -ENXIO;
 210 }
 211
 212 static int set_connected(struct connman_provider *provider,
 213                                         connman_bool_t connected)
 214 {
 215         struct connman_service *service = provider->vpn_service;
 216         struct connman_ipconfig *ipconfig;
 217
 218         if (service == NULL)
 219                 return -ENODEV;
 220
 221         ipconfig = __connman_service_get_ipconfig(service, provider->family);
 222
 223         if (connected == TRUE) {
 224                 if (ipconfig == NULL) {
 225                         provider_indicate_state(provider,
 226                                                 CONNMAN_SERVICE_STATE_FAILURE);
 227                         return -EIO;
 228                 }
 229
 230                 __connman_ipconfig_address_add(ipconfig);
 231                 __connman_ipconfig_gateway_add(ipconfig);
 232
 233                 provider_indicate_state(provider,
 234                                         CONNMAN_SERVICE_STATE_READY);
 235
 236                 if (provider->driver != NULL && provider->driver->set_routes)
 237                         provider->driver->set_routes(provider,
 238                                                 CONNMAN_PROVIDER_ROUTE_ALL);
 239
 240         } else {
 241                 if (ipconfig != NULL) {
 242                         provider_indicate_state(provider,
 243                                         CONNMAN_SERVICE_STATE_DISCONNECT);
 244                         __connman_ipconfig_gateway_remove(ipconfig);
 245                 }
 246
 247                 provider_indicate_state(provider,
 248                                         CONNMAN_SERVICE_STATE_IDLE);
 249         }
 250
 251         return 0;
 252 }
 253
 254 int connman_provider_set_state(struct connman_provider *provider,
 255                                         enum connman_provider_state state)
 256 {
 257         if (provider == NULL || provider->vpn_service == NULL)
 258                 return -EINVAL;
 259
 260         switch (state) {
 261         case CONNMAN_PROVIDER_STATE_UNKNOWN:
 262                 return -EINVAL;
 263         case CONNMAN_PROVIDER_STATE_IDLE:
 264                 return set_connected(provider, FALSE);
 265         case CONNMAN_PROVIDER_STATE_CONNECT:
 266                 return provider_indicate_state(provider,
 267                                         CONNMAN_SERVICE_STATE_ASSOCIATION);
 268         case CONNMAN_PROVIDER_STATE_READY:
 269                 return set_connected(provider, TRUE);
 270         case CONNMAN_PROVIDER_STATE_DISCONNECT:
 271                 return provider_indicate_state(provider,
 272                                         CONNMAN_SERVICE_STATE_DISCONNECT);
 273         case CONNMAN_PROVIDER_STATE_FAILURE:
 274                 return provider_indicate_state(provider,
 275                                         CONNMAN_SERVICE_STATE_FAILURE);
 276         }
 277
 278         return -EINVAL;
 279 }
 280
 281 int connman_provider_indicate_error(struct connman_provider *provider,
 282                                         enum connman_provider_error error)
 283 {
 284         enum connman_service_error service_error;
 285
 286         switch (error) {
 287         case CONNMAN_PROVIDER_ERROR_LOGIN_FAILED:
 288                 service_error = CONNMAN_SERVICE_ERROR_LOGIN_FAILED;
 289                 break;
 290         case CONNMAN_PROVIDER_ERROR_AUTH_FAILED:
 291                 service_error = CONNMAN_SERVICE_ERROR_AUTH_FAILED;
 292                 break;
 293         case CONNMAN_PROVIDER_ERROR_CONNECT_FAILED:
 294                 service_error = CONNMAN_SERVICE_ERROR_CONNECT_FAILED;
 295                 break;
 296         default:
 297                 service_error = CONNMAN_SERVICE_ERROR_UNKNOWN;
 298                 break;
 299         }
 300
 301         return __connman_service_indicate_error(provider->vpn_service,
 302                                                         service_error);
 303 }
 304
 305 int connman_provider_create_service(struct connman_provider *provider)
 306 {
 307         if (provider->vpn_service != NULL) {
 308                 connman_bool_t connected;
 309
 310                 connected = __connman_service_is_connected_state(
 311                         provider->vpn_service, CONNMAN_IPCONFIG_TYPE_IPV4);
 312                 if (connected == TRUE)
 313                         return -EALREADY;
 314
 315                 connected = __connman_service_is_connected_state(
 316                         provider->vpn_service, CONNMAN_IPCONFIG_TYPE_IPV6);
 317                 if (connected == TRUE)
 318                         return -EALREADY;
 319
 320                 return 0;
 321         }
 322
 323         provider->vpn_service =
 324                 __connman_service_create_from_provider(provider);
 325
 326         if (provider->vpn_service == NULL) {
 327                 connman_warn("service creation failed for provider %s",
 328                         provider->identifier);
 329
 330                 g_hash_table_remove(provider_hash, provider->identifier);
 331                 return -EOPNOTSUPP;
 332         }
 333
 334         return 0;
 335 }
 336
 337 int connman_provider_set_immutable(struct connman_provider *provider,
 338                                                 connman_bool_t immutable)
 339 {
 340         if (provider == NULL)
 341                 return -EINVAL;
 342
 343         if (provider->vpn_service == NULL)
 344                 return -ESRCH;
 345
 346         return __connman_service_set_immutable(provider->vpn_service,
 347                                                 immutable);
 348 }
 349
 350 static struct connman_provider *provider_lookup(const char *identifier)
 351 {
 352         return g_hash_table_lookup(provider_hash, identifier);
 353 }
 354
 355 static void connection_ready(DBusMessage *msg, int error_code, void *user_data)
 356 {
 357         DBusMessage *reply;
 358         const char *identifier = user_data;
 359
 360         DBG("msg %p error %d", msg, error_code);
 361
 362         if (error_code != 0) {
 363                 reply = __connman_error_failed(msg, -error_code);
 364                 if (g_dbus_send_message(connection, reply) == FALSE)
 365                         DBG("reply %p send failed", reply);
 366         } else {
 367                 const char *path;
 368                 struct connman_provider *provider;
 369
 370                 provider = provider_lookup(identifier);
 371                 if (provider == NULL) {
 372                         reply = __connman_error_failed(msg, -EINVAL);
 373                         g_dbus_send_message(connection, reply);
 374                         return;
 375                 }
 376
 377                 path = __connman_service_get_path(provider->vpn_service);
 378
 379                 g_dbus_send_reply(connection, msg,
 380                                 DBUS_TYPE_OBJECT_PATH, &path,
 381                                 DBUS_TYPE_INVALID);
 382         }
 383 }
 384
 385 int __connman_provider_create_and_connect(DBusMessage *msg)
 386 {
 387         struct connman_provider_driver *driver;
 388
 389         if (driver_list == NULL)
 390                 return -EINVAL;
 391
 392         driver = driver_list->data;
 393         if (driver == NULL || driver->create == NULL)
 394                 return -EINVAL;
 395
 396         DBG("msg %p", msg);
 397
 398         return driver->create(msg, connection_ready);
 399 }
 400
 401 const char * __connman_provider_get_ident(struct connman_provider *provider)
 402 {
 403         if (provider == NULL)
 404                 return NULL;
 405
 406         return provider->identifier;
 407 }
 408
 409 int connman_provider_set_string(struct connman_provider *provider,
 410                                         const char *key, const char *value)
 411 {
 412         if (provider->driver != NULL && provider->driver->set_property)
 413                 return provider->driver->set_property(provider, key, value);
 414
 415         return 0;
 416 }
 417
 418 const char *connman_provider_get_string(struct connman_provider *provider,
 419                                                         const char *key)
 420 {
 421         if (provider->driver != NULL && provider->driver->get_property)
 422                 return provider->driver->get_property(provider, key);
 423
 424         return NULL;
 425 }
 426
 427 connman_bool_t
 428 __connman_provider_check_routes(struct connman_provider *provider)
 429 {
 430         if (provider == NULL)
 431                 return FALSE;
 432
 433         if (provider->driver != NULL && provider->driver->check_routes)
 434                 return provider->driver->check_routes(provider);
 435
 436         return FALSE;
 437 }
 438
 439 void *connman_provider_get_data(struct connman_provider *provider)
 440 {
 441         return provider->driver_data;
 442 }
 443
 444 void connman_provider_set_data(struct connman_provider *provider, void *data)
 445 {
 446         provider->driver_data = data;
 447 }
 448
 449 void connman_provider_set_index(struct connman_provider *provider, int index)
 450 {
 451         struct connman_service *service = provider->vpn_service;
 452         struct connman_ipconfig *ipconfig;
 453
 454         DBG("");
 455
 456         if (service == NULL)
 457                 return;
 458
 459         ipconfig = __connman_service_get_ip4config(service);
 460
 461         if (ipconfig == NULL) {
 462                 connman_service_create_ip4config(service, index);
 463
 464                 ipconfig = __connman_service_get_ip4config(service);
 465                 if (ipconfig == NULL) {
 466                         DBG("Couldnt create ipconfig");
 467                         goto done;
 468                 }
 469         }
 470
 471         __connman_ipconfig_set_method(ipconfig, CONNMAN_IPCONFIG_METHOD_OFF);
 472         __connman_ipconfig_set_index(ipconfig, index);
 473
 474         ipconfig = __connman_service_get_ip6config(service);
 475
 476         if (ipconfig == NULL) {
 477                 connman_service_create_ip6config(service, index);
 478
 479                 ipconfig = __connman_service_get_ip6config(service);
 480                 if (ipconfig == NULL) {
 481                         DBG("Couldnt create ipconfig for IPv6");
 482                         goto done;
 483                 }
 484         }
 485
 486         __connman_ipconfig_set_method(ipconfig, CONNMAN_IPCONFIG_METHOD_OFF);
 487         __connman_ipconfig_set_index(ipconfig, index);
 488
 489 done:
 490         provider->index = index;
 491 }
 492
 493 int connman_provider_get_index(struct connman_provider *provider)
 494 {
 495         return provider->index;
 496 }
 497
 498 int connman_provider_set_ipaddress(struct connman_provider *provider,
 499                                         struct connman_ipaddress *ipaddress)
 500 {
 501         struct connman_ipconfig *ipconfig = NULL;
 502
 503         ipconfig = __connman_service_get_ipconfig(provider->vpn_service,
 504                                                         ipaddress->family);
 505         if (ipconfig == NULL)
 506                 return -EINVAL;
 507
 508         provider->family = ipaddress->family;
 509
 510         __connman_ipconfig_set_method(ipconfig, CONNMAN_IPCONFIG_METHOD_FIXED);
 511
 512         __connman_ipconfig_set_local(ipconfig, ipaddress->local);
 513         __connman_ipconfig_set_peer(ipconfig, ipaddress->peer);
 514         __connman_ipconfig_set_broadcast(ipconfig, ipaddress->broadcast);
 515         __connman_ipconfig_set_gateway(ipconfig, ipaddress->gateway);
 516         __connman_ipconfig_set_prefixlen(ipconfig, ipaddress->prefixlen);
 517
 518         return 0;
 519 }
 520
 521 int connman_provider_set_pac(struct connman_provider *provider, const char *pac)
 522 {
 523         DBG("provider %p pac %s", provider, pac);
 524
 525         __connman_service_set_pac(provider->vpn_service, pac);
 526
 527         return 0;
 528 }
 529
 530
 531 int connman_provider_set_domain(struct connman_provider *provider,
 532                                         const char *domain)
 533 {
 534         DBG("provider %p domain %s", provider, domain);
 535
 536         __connman_service_set_domainname(provider->vpn_service, domain);
 537
 538         return 0;
 539 }
 540
 541 int connman_provider_set_nameservers(struct connman_provider *provider,
 542                                         const char *nameservers)
 543 {
 544         int i;
 545         char **nameservers_array = NULL;
 546
 547         DBG("provider %p nameservers %s", provider, nameservers);
 548
 549         __connman_service_nameserver_clear(provider->vpn_service);
 550
 551         if (nameservers == NULL)
 552                 return 0;
 553
 554         nameservers_array = g_strsplit(nameservers, " ", 0);
 555
 556         for (i = 0; nameservers_array[i] != NULL; i++) {
 557                 __connman_service_nameserver_append(provider->vpn_service,
 558                                                 nameservers_array[i], FALSE);
 559         }
 560
 561         g_strfreev(nameservers_array);
 562
 563         return 0;
 564 }
 565
 566 static void unregister_provider(gpointer data)
 567 {
 568         struct connman_provider *provider = data;
 569
 570         DBG("provider %p service %p", provider, provider->vpn_service);
 571
 572         if (provider->vpn_service != NULL) {
 573                 connman_service_unref(provider->vpn_service);
 574                 provider->vpn_service = NULL;
 575         }
 576
 577         connman_provider_unref(provider);
 578 }
 579
 580 static gint compare_priority(gconstpointer a, gconstpointer b)
 581 {
 582         return 0;
 583 }
 584
 585 int connman_provider_driver_register(struct connman_provider_driver *driver)
 586 {
 587         DBG("driver %p name %s", driver, driver->name);
 588
 589         driver_list = g_slist_insert_sorted(driver_list, driver,
 590                                                         compare_priority);
 591         return 0;
 592 }
 593
 594 void connman_provider_driver_unregister(struct connman_provider_driver *driver)
 595 {
 596         DBG("driver %p name %s", driver, driver->name);
 597
 598         driver_list = g_slist_remove(driver_list, driver);
 599 }
 600
 601 void connman_provider_set_driver(struct connman_provider *provider,
 602                                 struct connman_provider_driver *driver)
 603 {
 604         provider->driver = driver;
 605 }
 606
 607 static void provider_disconnect_all(gpointer key, gpointer value,
 608                                                 gpointer user_data)
 609 {
 610         struct connman_provider *provider = value;
 611
 612         connman_provider_disconnect(provider);
 613 }
 614
 615 static void provider_offline_mode(connman_bool_t enabled)
 616 {
 617         DBG("enabled %d", enabled);
 618
 619         if (enabled == TRUE)
 620                 g_hash_table_foreach(provider_hash, provider_disconnect_all,
 621                                                                         NULL);
 622
 623 }
 624
 625 static void provider_initialize(struct connman_provider *provider)
 626 {
 627         DBG("provider %p", provider);
 628
 629         provider->index = 0;
 630         provider->identifier = NULL;
 631 }
 632
 633 static struct connman_provider *provider_new(void)
 634 {
 635         struct connman_provider *provider;
 636
 637         provider = g_try_new0(struct connman_provider, 1);
 638         if (provider == NULL)
 639                 return NULL;
 640
 641         provider->refcount = 1;
 642
 643         DBG("provider %p", provider);
 644         provider_initialize(provider);
 645
 646         return provider;
 647 }
 648
 649 struct connman_provider *connman_provider_get(const char *identifier)
 650 {
 651         struct connman_provider *provider;
 652
 653         provider = g_hash_table_lookup(provider_hash, identifier);
 654         if (provider != NULL)
 655                 return provider;
 656
 657         provider = provider_new();
 658         if (provider == NULL)
 659                 return NULL;
 660
 661         DBG("provider %p", provider);
 662
 663         provider->identifier = g_strdup(identifier);
 664
 665         g_hash_table_insert(provider_hash, provider->identifier, provider);
 666
 667         return provider;
 668 }
 669
 670 void connman_provider_put(struct connman_provider *provider)
 671 {
 672         g_hash_table_remove(provider_hash, provider->identifier);
 673 }
 674
 675 static struct connman_provider *provider_get(int index)
 676 {
 677         GHashTableIter iter;
 678         gpointer value, key;
 679
 680         g_hash_table_iter_init(&iter, provider_hash);
 681
 682         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 683                 struct connman_provider *provider = value;
 684
 685                 if (provider->index == index)
 686                         return provider;
 687         }
 688
 689         return NULL;
 690 }
 691
 692 static void provider_service_changed(struct connman_service *service,
 693                                 enum connman_service_state state)
 694 {
 695         struct connman_provider *provider;
 696         int vpn_index, service_index;
 697
 698         if (service == NULL)
 699                 return;
 700
 701         switch (state) {
 702         case CONNMAN_SERVICE_STATE_UNKNOWN:
 703         case CONNMAN_SERVICE_STATE_IDLE:
 704         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 705         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 706         case CONNMAN_SERVICE_STATE_READY:
 707         case CONNMAN_SERVICE_STATE_ONLINE:
 708                 return;
 709         case CONNMAN_SERVICE_STATE_DISCONNECT:
 710         case CONNMAN_SERVICE_STATE_FAILURE:
 711                 break;
 712         }
 713
 714         service_index = __connman_service_get_index(service);
 715
 716         vpn_index = __connman_connection_get_vpn_index(service_index);
 717
 718         DBG("service %p %s state %d index %d/%d", service,
 719                 __connman_service_get_ident(service),
 720                 state, service_index, vpn_index);
 721
 722         if (vpn_index < 0)
 723                 return;
 724
 725         provider = provider_get(vpn_index);
 726         if (provider == NULL)
 727                 return;
 728
 729         DBG("disconnect %p index %d", provider, vpn_index);
 730
 731         connman_provider_disconnect(provider);
 732
 733         return;
 734 }
 735
 736 static struct connman_notifier provider_notifier = {
 737         .name                   = "provider",
 738         .offline_mode           = provider_offline_mode,
 739         .service_state_changed  = provider_service_changed,
 740 };
 741
 742 int __connman_provider_init(void)
 743 {
 744         int err;
 745
 746         DBG("");
 747
 748         connection = connman_dbus_get_connection();
 749
 750         provider_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 751                                                 NULL, unregister_provider);
 752
 753         err = connman_notifier_register(&provider_notifier);
 754         if (err < 0) {
 755                 g_hash_table_destroy(provider_hash);
 756                 dbus_connection_unref(connection);
 757         }
 758
 759         return err;
 760 }
 761
 762 void __connman_provider_cleanup(void)
 763 {
 764         DBG("");
 765
 766         connman_notifier_unregister(&provider_notifier);
 767
 768         g_hash_table_destroy(provider_hash);
 769         provider_hash = NULL;
 770
 771         dbus_connection_unref(connection);
 772 }