src/session.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2012  Intel Corporation. All rights reserved.
   6  *  Copyright (C) 2011  BWM CarIT GmbH. All rights reserved.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  *
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <errno.h>
  28
  29 #include <gdbus.h>
  30
  31 #include <connman/session.h>
  32
  33 #include "connman.h"
  34
  35 static DBusConnection *connection;
  36 static GHashTable *session_hash;
  37 static connman_bool_t sessionmode;
  38 static struct connman_session *ecall_session;
  39 static GSList *policy_list;
  40
  41 enum connman_session_trigger {
  42         CONNMAN_SESSION_TRIGGER_UNKNOWN         = 0,
  43         CONNMAN_SESSION_TRIGGER_SETTING         = 1,
  44         CONNMAN_SESSION_TRIGGER_CONNECT         = 2,
  45         CONNMAN_SESSION_TRIGGER_DISCONNECT      = 3,
  46         CONNMAN_SESSION_TRIGGER_SERVICE         = 4,
  47         CONNMAN_SESSION_TRIGGER_ECALL           = 5,
  48 };
  49
  50 enum connman_session_reason {
  51         CONNMAN_SESSION_REASON_UNKNOWN          = 0,
  52         CONNMAN_SESSION_REASON_CONNECT          = 1,
  53         CONNMAN_SESSION_REASON_FREE_RIDE        = 2,
  54 };
  55
  56 enum connman_session_state {
  57         CONNMAN_SESSION_STATE_DISCONNECTED   = 0,
  58         CONNMAN_SESSION_STATE_CONNECTED      = 1,
  59         CONNMAN_SESSION_STATE_ONLINE         = 2,
  60 };
  61
  62 struct service_entry {
  63         /* track why this service was selected */
  64         enum connman_session_reason reason;
  65         enum connman_service_state state;
  66         const char *name;
  67         struct connman_service *service;
  68         char *ifname;
  69         const char *bearer;
  70         GSList *pending_timeouts;
  71 };
  72
  73 struct session_info {
  74         struct connman_session_config config;
  75         enum connman_session_state state;
  76         struct service_entry *entry;
  77         enum connman_session_reason reason;
  78 };
  79
  80 struct connman_session {
  81         char *owner;
  82         char *session_path;
  83         char *notify_path;
  84         guint notify_watch;
  85
  86         struct connman_session_policy *policy;
  87
  88         connman_bool_t append_all;
  89         struct session_info *info;
  90         struct session_info *info_last;
  91         struct connman_session_config *policy_config;
  92
  93         connman_bool_t ecall;
  94
  95         GSequence *service_list;
  96         GHashTable *service_hash;
  97 };
  98
  99 static const char *trigger2string(enum connman_session_trigger trigger)
 100 {
 101         switch (trigger) {
 102         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
 103                 break;
 104         case CONNMAN_SESSION_TRIGGER_SETTING:
 105                 return "setting";
 106         case CONNMAN_SESSION_TRIGGER_CONNECT:
 107                 return "connect";
 108         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
 109                 return "disconnect";
 110         case CONNMAN_SESSION_TRIGGER_SERVICE:
 111                 return "service";
 112         case CONNMAN_SESSION_TRIGGER_ECALL:
 113                 return "ecall";
 114         }
 115
 116         return NULL;
 117 }
 118
 119 static const char *reason2string(enum connman_session_reason reason)
 120 {
 121         switch (reason) {
 122         case CONNMAN_SESSION_REASON_UNKNOWN:
 123                 return "unknown";
 124         case CONNMAN_SESSION_REASON_CONNECT:
 125                 return "connect";
 126         case CONNMAN_SESSION_REASON_FREE_RIDE:
 127                 return "free-ride";
 128         }
 129
 130         return NULL;
 131 }
 132
 133 static const char *state2string(enum connman_session_state state)
 134 {
 135         switch (state) {
 136         case CONNMAN_SESSION_STATE_DISCONNECTED:
 137                 return "disconnected";
 138         case CONNMAN_SESSION_STATE_CONNECTED:
 139                 return "connected";
 140         case CONNMAN_SESSION_STATE_ONLINE:
 141                 return "online";
 142         }
 143
 144         return NULL;
 145 }
 146
 147 static const char *type2string(enum connman_session_type type)
 148 {
 149         switch (type) {
 150         case CONNMAN_SESSION_TYPE_UNKNOWN:
 151                 return "";
 152         case CONNMAN_SESSION_TYPE_ANY:
 153                 return "any";
 154         case CONNMAN_SESSION_TYPE_LOCAL:
 155                 return "local";
 156         case CONNMAN_SESSION_TYPE_INTERNET:
 157                 return "internet";
 158         }
 159
 160         return NULL;
 161 }
 162
 163 static enum connman_session_type string2type(const char *type)
 164 {
 165         if (g_strcmp0(type, "any") == 0)
 166                 return CONNMAN_SESSION_TYPE_ANY;
 167         if (g_strcmp0(type, "local") == 0)
 168                 return CONNMAN_SESSION_TYPE_LOCAL;
 169         else if (g_strcmp0(type, "internet") == 0)
 170                 return CONNMAN_SESSION_TYPE_INTERNET;
 171
 172         return CONNMAN_SESSION_TYPE_UNKNOWN;
 173 }
 174
 175 static int bearer2service(const char *bearer, enum connman_service_type *type)
 176 {
 177         if (g_strcmp0(bearer, "ethernet") == 0)
 178                 *type = CONNMAN_SERVICE_TYPE_ETHERNET;
 179         else if (g_strcmp0(bearer, "wifi") == 0)
 180                 *type = CONNMAN_SERVICE_TYPE_WIFI;
 181         else if (g_strcmp0(bearer, "wimax") == 0)
 182                 *type = CONNMAN_SERVICE_TYPE_WIMAX;
 183         else if (g_strcmp0(bearer, "bluetooth") == 0)
 184                 *type = CONNMAN_SERVICE_TYPE_BLUETOOTH;
 185         else if (g_strcmp0(bearer, "cellular") == 0)
 186                 *type = CONNMAN_SERVICE_TYPE_CELLULAR;
 187         else if (g_strcmp0(bearer, "vpn") == 0)
 188                 *type = CONNMAN_SERVICE_TYPE_VPN;
 189         else if (g_strcmp0(bearer, "*") == 0)
 190                 *type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 191         else
 192                 return -EINVAL;
 193
 194         return 0;
 195 }
 196
 197 static char *service2bearer(enum connman_service_type type)
 198 {
 199         switch (type) {
 200         case CONNMAN_SERVICE_TYPE_ETHERNET:
 201                 return "ethernet";
 202         case CONNMAN_SERVICE_TYPE_WIFI:
 203                 return "wifi";
 204         case CONNMAN_SERVICE_TYPE_WIMAX:
 205                 return "wimax";
 206         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 207                 return "bluetooth";
 208         case CONNMAN_SERVICE_TYPE_CELLULAR:
 209                 return "cellular";
 210         case CONNMAN_SERVICE_TYPE_VPN:
 211                 return "vpn";
 212         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 213         case CONNMAN_SERVICE_TYPE_SYSTEM:
 214         case CONNMAN_SERVICE_TYPE_GPS:
 215         case CONNMAN_SERVICE_TYPE_GADGET:
 216                 return "";
 217         }
 218
 219         return "";
 220 }
 221
 222 static int assign_policy_plugin(struct connman_session *session)
 223 {
 224         if (session->policy != NULL)
 225                 return -EALREADY;
 226
 227         if (policy_list == NULL)
 228                 return 0;
 229
 230         session->policy = policy_list->data;
 231
 232         return 0;
 233 }
 234
 235 static int create_policy_config(struct connman_session *session,
 236                                 connman_session_config_cb callback,
 237                                 void *user_data)
 238 {
 239         struct connman_session_config *config;
 240
 241         if (session->policy == NULL) {
 242                 config = connman_session_create_default_config();
 243                 if (config == NULL)
 244                         return -ENOMEM;
 245
 246                 session->policy_config = config;
 247
 248                 return 0;
 249         }
 250
 251         return (*session->policy->create)(session, callback, user_data);
 252 }
 253
 254 static void destroy_policy_config(struct connman_session *session)
 255 {
 256         if (session->policy == NULL) {
 257                 connman_session_free_bearers(
 258                         session->policy_config->allowed_bearers);
 259                 g_free(session->policy_config);
 260         } else {
 261                 (*session->policy->destroy)(session);
 262         }
 263 }
 264
 265 static void probe_policy(struct connman_session_policy *policy)
 266 {
 267
 268         GHashTableIter iter;
 269         gpointer key, value;
 270         struct connman_session *session;
 271
 272         DBG("policy %p name %s", policy, policy->name);
 273
 274         g_hash_table_iter_init(&iter, session_hash);
 275
 276         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 277                 session = value;
 278
 279                 if (session->policy != NULL)
 280                         continue;
 281
 282                 assign_policy_plugin(session);
 283         }
 284 }
 285
 286 static void remove_policy(struct connman_session_policy *policy)
 287 {
 288         GHashTableIter iter;
 289         gpointer key, value;
 290         struct connman_session *session;
 291
 292         DBG("policy %p name %s", policy, policy->name);
 293
 294         g_hash_table_iter_init(&iter, session_hash);
 295
 296         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 297                 session = value;
 298
 299                 if (session->policy != policy)
 300                         continue;
 301
 302                 session->policy = NULL;
 303                 assign_policy_plugin(session);
 304         }
 305 }
 306
 307 static gint compare_priority(gconstpointer a, gconstpointer b)
 308 {
 309         const struct connman_session_policy *policy1 = a;
 310         const struct connman_session_policy *policy2 = b;
 311
 312         return policy2->priority - policy1->priority;
 313 }
 314
 315
 316 int connman_session_policy_register(struct connman_session_policy *policy)
 317 {
 318         DBG("name %s", policy->name);
 319
 320         if (policy->create == NULL || policy->destroy == NULL)
 321                 return -EINVAL;
 322
 323         policy_list = g_slist_insert_sorted(policy_list, policy,
 324                                                 compare_priority);
 325
 326         probe_policy(policy);
 327
 328         return 0;
 329 }
 330
 331 void connman_session_policy_unregister(struct connman_session_policy *policy)
 332 {
 333         DBG("name %s", policy->name);
 334
 335         policy_list = g_slist_remove(policy_list, policy);
 336
 337         remove_policy(policy);
 338 }
 339
 340 struct connman_session_config *connman_session_create_default_config(void)
 341 {
 342         struct connman_session_config *config;
 343
 344         config = g_try_new0(struct connman_session_config, 1);
 345         if (config == NULL)
 346                 return NULL;
 347
 348         config->priority = FALSE;
 349         config->roaming_policy = CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 350         config->type = CONNMAN_SESSION_TYPE_ANY;
 351         config->ecall = FALSE;
 352         config->allowed_bearers = connman_session_allowed_bearers_any();
 353         if (config->allowed_bearers == NULL) {
 354                 g_free(config);
 355                 return NULL;
 356         }
 357
 358         return config;
 359 }
 360
 361 static enum connman_session_type apply_policy_on_type(
 362                         enum connman_session_type policy,
 363                         enum connman_session_type type)
 364 {
 365         if (type == CONNMAN_SESSION_TYPE_UNKNOWN)
 366                 return CONNMAN_SESSION_TYPE_UNKNOWN;
 367
 368         if (policy == CONNMAN_SESSION_TYPE_ANY)
 369                 return type;
 370
 371         if (policy == CONNMAN_SESSION_TYPE_LOCAL)
 372                 return CONNMAN_SESSION_TYPE_LOCAL;
 373
 374         return CONNMAN_SESSION_TYPE_INTERNET;
 375 }
 376
 377 static void cleanup_bearer(gpointer data)
 378 {
 379         struct connman_session_bearer *bearer = data;
 380
 381         g_free(bearer);
 382 }
 383
 384 void connman_session_free_bearers(GSList *bearers)
 385 {
 386         g_slist_free_full(bearers, cleanup_bearer);
 387 }
 388
 389 static int parse_bearers(DBusMessageIter *iter, GSList **list)
 390 {
 391         struct connman_session_bearer *bearer;
 392         DBusMessageIter array;
 393         int type, err;
 394
 395         dbus_message_iter_recurse(iter, &array);
 396
 397         *list = NULL;
 398
 399         while ((type = dbus_message_iter_get_arg_type(&array)) !=
 400                         DBUS_TYPE_INVALID) {
 401                 char *bearer_name = NULL;
 402
 403                 if (type != DBUS_TYPE_STRING) {
 404                         connman_session_free_bearers(*list);
 405                         *list = NULL;
 406                         return -EINVAL;
 407                 }
 408
 409                 dbus_message_iter_get_basic(&array, &bearer_name);
 410
 411                 bearer = g_try_new0(struct connman_session_bearer, 1);
 412                 if (bearer == NULL) {
 413                         connman_session_free_bearers(*list);
 414                         *list = NULL;
 415                         return -ENOMEM;
 416                 }
 417
 418                 err = bearer2service(bearer_name, &bearer->service_type);
 419                 if (err < 0) {
 420                         connman_session_free_bearers(*list);
 421                         *list = NULL;
 422                         return err;
 423                 }
 424
 425                 *list = g_slist_append(*list, bearer);
 426
 427                 dbus_message_iter_next(&array);
 428         }
 429
 430         return 0;
 431 }
 432
 433 static struct connman_session_bearer *clone_bearer(
 434                                         struct connman_session_bearer *orig)
 435 {
 436         struct connman_session_bearer *bearer;
 437
 438         bearer = g_try_new0(struct connman_session_bearer, 1);
 439         if (bearer == NULL)
 440                 return NULL;
 441
 442         bearer->service_type = orig->service_type;
 443
 444         return bearer;
 445 }
 446
 447 static int filter_bearer(GSList *policy_bearers,
 448                                 struct connman_session_bearer *bearer,
 449                                 GSList **list)
 450 {
 451         struct connman_session_bearer *policy, *tmp;
 452         GSList *it;
 453
 454         if (policy_bearers == NULL)
 455                 goto clone;
 456
 457         for (it = policy_bearers; it != NULL; it = it->next) {
 458                 policy = it->data;
 459
 460                 if (policy->service_type != CONNMAN_SERVICE_TYPE_UNKNOWN &&
 461                                 bearer->service_type != policy->service_type)
 462                         continue;
 463
 464                 goto clone;
 465         }
 466
 467         *list = NULL;
 468
 469         return 0;
 470
 471 clone:
 472         tmp = clone_bearer(bearer);
 473         if (tmp == NULL) {
 474                 connman_session_free_bearers(*list);
 475                 *list = NULL;
 476                 return -ENOMEM;
 477         }
 478         *list = g_slist_append(*list, tmp);
 479
 480         return 0;
 481 }
 482
 483 static int apply_policy_on_bearers(GSList *policy_bearers, GSList *bearers,
 484                                 GSList **list)
 485 {
 486         struct connman_session_bearer *bearer;
 487         GSList *it;
 488         int err;
 489
 490         *list = NULL;
 491
 492         for (it = bearers; it != NULL; it = it->next) {
 493                 bearer = it->data;
 494
 495                 err = filter_bearer(policy_bearers, bearer, list);
 496                 if (err < 0)
 497                         return err;
 498         }
 499
 500         return 0;
 501 }
 502
 503 GSList *connman_session_allowed_bearers_any(void)
 504 {
 505         struct connman_session_bearer *bearer;
 506         GSList *list = NULL;
 507
 508         bearer = g_try_new0(struct connman_session_bearer, 1);
 509         if (bearer == NULL)
 510                 return NULL;
 511
 512         bearer->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 513
 514         list = g_slist_append(list, bearer);
 515
 516         return list;
 517 }
 518
 519 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 520 {
 521         struct session_info *info = user_data;
 522         GSList *list;
 523
 524         for (list = info->config.allowed_bearers;
 525                         list != NULL; list = list->next) {
 526                 struct connman_session_bearer *bearer = list->data;
 527                 const char *name =
 528                         __connman_service_type2string(bearer->service_type);
 529
 530                 if (name == NULL)
 531                         name = "*";
 532
 533                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 534                                                 &name);
 535         }
 536 }
 537
 538 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 539 {
 540         struct connman_service *service = user_data;
 541         struct connman_ipconfig *ipconfig_ipv4;
 542
 543         if (service == NULL)
 544                 return;
 545
 546         if (__connman_service_is_connected_state(service,
 547                                 CONNMAN_IPCONFIG_TYPE_IPV4) == FALSE) {
 548                 return;
 549         }
 550
 551         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 552         if (ipconfig_ipv4 == NULL)
 553                 return;
 554
 555         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 556 }
 557
 558 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 559 {
 560         struct connman_service *service = user_data;
 561         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 562
 563         if (service == NULL)
 564                 return;
 565
 566         if (__connman_service_is_connected_state(service,
 567                                 CONNMAN_IPCONFIG_TYPE_IPV6) == FALSE) {
 568                 return;
 569         }
 570
 571         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 572         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 573         if (ipconfig_ipv6 == NULL)
 574                 return;
 575
 576         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 577 }
 578
 579 static void append_notify(DBusMessageIter *dict,
 580                                         struct connman_session *session)
 581 {
 582         struct session_info *info = session->info;
 583         struct session_info *info_last = session->info_last;
 584         struct connman_service *service;
 585         const char *name, *ifname, *bearer;
 586
 587         if (session->append_all == TRUE ||
 588                         info->state != info_last->state) {
 589                 const char *state = state2string(info->state);
 590
 591                 connman_dbus_dict_append_basic(dict, "State",
 592                                                 DBUS_TYPE_STRING,
 593                                                 &state);
 594                 info_last->state = info->state;
 595         }
 596
 597         if (session->append_all == TRUE ||
 598                         info->entry != info_last->entry) {
 599                 if (info->entry == NULL) {
 600                         name = "";
 601                         ifname = "";
 602                         service = NULL;
 603                         bearer = "";
 604                 } else {
 605                         name = info->entry->name;
 606                         ifname = info->entry->ifname;
 607                         service = info->entry->service;
 608                         bearer = info->entry->bearer;
 609                 }
 610
 611                 connman_dbus_dict_append_basic(dict, "Name",
 612                                                 DBUS_TYPE_STRING,
 613                                                 &name);
 614
 615                 connman_dbus_dict_append_dict(dict, "IPv4",
 616                                                 append_ipconfig_ipv4,
 617                                                 service);
 618
 619                 connman_dbus_dict_append_dict(dict, "IPv6",
 620                                                 append_ipconfig_ipv6,
 621                                                 service);
 622
 623                 connman_dbus_dict_append_basic(dict, "Interface",
 624                                                 DBUS_TYPE_STRING,
 625                                                 &ifname);
 626
 627                 connman_dbus_dict_append_basic(dict, "Bearer",
 628                                                 DBUS_TYPE_STRING,
 629                                                 &bearer);
 630
 631                 info_last->entry = info->entry;
 632         }
 633
 634         if (session->append_all == TRUE ||
 635                         info->config.type != info_last->config.type) {
 636                 const char *type = type2string(info->config.type);
 637
 638                 connman_dbus_dict_append_basic(dict, "ConnectionType",
 639                                                 DBUS_TYPE_STRING,
 640                                                 &type);
 641                 info_last->config.type = info->config.type;
 642         }
 643
 644         if (session->append_all == TRUE ||
 645                         info->config.allowed_bearers != info_last->config.allowed_bearers) {
 646                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 647                                                 DBUS_TYPE_STRING,
 648                                                 append_allowed_bearers,
 649                                                 info);
 650                 info_last->config.allowed_bearers = info->config.allowed_bearers;
 651         }
 652
 653         session->append_all = FALSE;
 654 }
 655
 656 static connman_bool_t is_type_matching_state(enum connman_session_state *state,
 657                                                 enum connman_session_type type)
 658 {
 659         switch (type) {
 660         case CONNMAN_SESSION_TYPE_UNKNOWN:
 661                 return FALSE;
 662         case CONNMAN_SESSION_TYPE_ANY:
 663                 return TRUE;
 664         case CONNMAN_SESSION_TYPE_LOCAL:
 665                 if (*state >= CONNMAN_SESSION_STATE_CONNECTED) {
 666                         *state = CONNMAN_SESSION_STATE_CONNECTED;
 667                         return TRUE;
 668                 }
 669
 670                 break;
 671         case CONNMAN_SESSION_TYPE_INTERNET:
 672                 if (*state == CONNMAN_SESSION_STATE_ONLINE)
 673                         return TRUE;
 674                 break;
 675         }
 676
 677         return FALSE;
 678 }
 679
 680 static connman_bool_t compute_notifiable_changes(struct connman_session *session)
 681 {
 682         struct session_info *info_last = session->info_last;
 683         struct session_info *info = session->info;
 684
 685         if (session->append_all == TRUE)
 686                 return TRUE;
 687
 688         if (info->state != info_last->state)
 689                 return TRUE;
 690
 691         if (info->entry != info_last->entry &&
 692                         info->state >= CONNMAN_SESSION_STATE_CONNECTED)
 693                 return TRUE;
 694
 695         if (info->config.allowed_bearers != info_last->config.allowed_bearers ||
 696                         info->config.type != info_last->config.type)
 697                 return TRUE;
 698
 699         return FALSE;
 700 }
 701
 702 static gboolean session_notify(gpointer user_data)
 703 {
 704         struct connman_session *session = user_data;
 705         DBusMessage *msg;
 706         DBusMessageIter array, dict;
 707
 708         if (compute_notifiable_changes(session) == FALSE)
 709                 return FALSE;
 710
 711         DBG("session %p owner %s notify_path %s", session,
 712                 session->owner, session->notify_path);
 713
 714         msg = dbus_message_new_method_call(session->owner, session->notify_path,
 715                                                 CONNMAN_NOTIFICATION_INTERFACE,
 716                                                 "Update");
 717         if (msg == NULL)
 718                 return FALSE;
 719
 720         dbus_message_iter_init_append(msg, &array);
 721         connman_dbus_dict_open(&array, &dict);
 722
 723         append_notify(&dict, session);
 724
 725         connman_dbus_dict_close(&array, &dict);
 726
 727         g_dbus_send_message(connection, msg);
 728
 729         return FALSE;
 730 }
 731
 732 static void ipconfig_ipv4_changed(struct connman_session *session)
 733 {
 734         struct session_info *info = session->info;
 735
 736         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 737                                                 "IPv4", append_ipconfig_ipv4,
 738                                                 info->entry->service);
 739 }
 740
 741 static void ipconfig_ipv6_changed(struct connman_session *session)
 742 {
 743         struct session_info *info = session->info;
 744
 745         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 746                                                 "IPv6", append_ipconfig_ipv6,
 747                                                 info->entry->service);
 748 }
 749
 750 static connman_bool_t service_type_match(struct connman_session *session,
 751                                         struct connman_service *service)
 752 {
 753         struct session_info *info = session->info;
 754         GSList *list;
 755
 756         for (list = info->config.allowed_bearers;
 757                         list != NULL; list = list->next) {
 758                 struct connman_session_bearer *bearer = list->data;
 759                 enum connman_service_type service_type;
 760
 761                 if (bearer->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN)
 762                         return TRUE;
 763
 764                 service_type = connman_service_get_type(service);
 765                 if (bearer->service_type == service_type)
 766                         return TRUE;
 767         }
 768
 769         return FALSE;
 770 }
 771
 772 static connman_bool_t service_match(struct connman_session *session,
 773                                         struct connman_service *service)
 774 {
 775         if (service_type_match(session, service) == FALSE)
 776                 return FALSE;
 777
 778         return TRUE;
 779 }
 780
 781 static int service_type_weight(enum connman_service_type type)
 782 {
 783         /*
 784          * The session doesn't care which service
 785          * to use. Nevertheless we have to sort them
 786          * according their type. The ordering is
 787          *
 788          * 1. Ethernet
 789          * 2. Bluetooth
 790          * 3. WiFi/WiMAX
 791          * 4. Cellular
 792          */
 793
 794         switch (type) {
 795         case CONNMAN_SERVICE_TYPE_ETHERNET:
 796                 return 4;
 797         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 798                 return 3;
 799         case CONNMAN_SERVICE_TYPE_WIFI:
 800         case CONNMAN_SERVICE_TYPE_WIMAX:
 801                 return 2;
 802         case CONNMAN_SERVICE_TYPE_CELLULAR:
 803                 return 1;
 804         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 805         case CONNMAN_SERVICE_TYPE_SYSTEM:
 806         case CONNMAN_SERVICE_TYPE_GPS:
 807         case CONNMAN_SERVICE_TYPE_VPN:
 808         case CONNMAN_SERVICE_TYPE_GADGET:
 809                 break;
 810         }
 811
 812         return 0;
 813 }
 814
 815 static gint sort_allowed_bearers(struct connman_service *service_a,
 816                                         struct connman_service *service_b,
 817                                         struct connman_session *session)
 818 {
 819         struct session_info *info = session->info;
 820         GSList *list;
 821         enum connman_service_type type_a, type_b;
 822         int weight_a, weight_b;
 823
 824         type_a = connman_service_get_type(service_a);
 825         type_b = connman_service_get_type(service_b);
 826
 827         for (list = info->config.allowed_bearers;
 828                         list != NULL; list = list->next) {
 829                 struct connman_session_bearer *bearer = list->data;
 830
 831                 if (bearer->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN) {
 832                         if (type_a != type_b) {
 833                                 weight_a = service_type_weight(type_a);
 834                                 weight_b = service_type_weight(type_b);
 835
 836                                 if (weight_a > weight_b)
 837                                         return -1;
 838
 839                                 if (weight_a < weight_b)
 840                                         return 1;
 841
 842                                 return 0;
 843                         }
 844                 }
 845
 846                 if (type_a == bearer->service_type &&
 847                                 type_b == bearer->service_type) {
 848                         return 0;
 849                 }
 850
 851                 if (type_a == bearer->service_type &&
 852                                 type_b != bearer->service_type) {
 853                         return -1;
 854                 }
 855
 856                 if (type_a != bearer->service_type &&
 857                                 type_b == bearer->service_type) {
 858                         return 1;
 859                 }
 860         }
 861
 862         return 0;
 863 }
 864
 865 static gint sort_services(gconstpointer a, gconstpointer b, gpointer user_data)
 866 {
 867         struct service_entry *entry_a = (void *)a;
 868         struct service_entry *entry_b = (void *)b;
 869         struct connman_session *session = user_data;
 870
 871         return sort_allowed_bearers(entry_a->service, entry_b->service,
 872                                 session);
 873 }
 874
 875 static void free_session(struct connman_session *session)
 876 {
 877         destroy_policy_config(session);
 878         connman_session_free_bearers(session->info->config.allowed_bearers);
 879         g_free(session->owner);
 880         g_free(session->session_path);
 881         g_free(session->notify_path);
 882         g_free(session->info);
 883         g_free(session->info_last);
 884
 885         g_free(session);
 886 }
 887
 888 static void cleanup_session(gpointer user_data)
 889 {
 890         struct connman_session *session = user_data;
 891         struct session_info *info = session->info;
 892
 893         DBG("remove %s", session->session_path);
 894
 895         g_hash_table_destroy(session->service_hash);
 896         g_sequence_free(session->service_list);
 897
 898         if (info->entry != NULL &&
 899                         info->entry->reason == CONNMAN_SESSION_REASON_CONNECT) {
 900                 __connman_service_disconnect(info->entry->service);
 901         }
 902
 903         free_session(session);
 904 }
 905
 906 static enum connman_session_state service_to_session_state(enum connman_service_state state)
 907 {
 908         switch (state) {
 909         case CONNMAN_SERVICE_STATE_UNKNOWN:
 910         case CONNMAN_SERVICE_STATE_IDLE:
 911         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 912         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 913         case CONNMAN_SERVICE_STATE_DISCONNECT:
 914         case CONNMAN_SERVICE_STATE_FAILURE:
 915                 break;
 916         case CONNMAN_SERVICE_STATE_READY:
 917                 return CONNMAN_SESSION_STATE_CONNECTED;
 918         case CONNMAN_SERVICE_STATE_ONLINE:
 919                 return CONNMAN_SESSION_STATE_ONLINE;
 920         }
 921
 922         return CONNMAN_SESSION_STATE_DISCONNECTED;
 923 }
 924
 925 static connman_bool_t is_connected(enum connman_service_state state)
 926 {
 927         switch (state) {
 928         case CONNMAN_SERVICE_STATE_UNKNOWN:
 929         case CONNMAN_SERVICE_STATE_IDLE:
 930         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 931         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 932         case CONNMAN_SERVICE_STATE_DISCONNECT:
 933         case CONNMAN_SERVICE_STATE_FAILURE:
 934                 break;
 935         case CONNMAN_SERVICE_STATE_READY:
 936         case CONNMAN_SERVICE_STATE_ONLINE:
 937                 return TRUE;
 938         }
 939
 940         return FALSE;
 941 }
 942
 943 static connman_bool_t is_connecting(enum connman_service_state state)
 944 {
 945         switch (state) {
 946         case CONNMAN_SERVICE_STATE_UNKNOWN:
 947         case CONNMAN_SERVICE_STATE_IDLE:
 948                 break;
 949         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 950         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 951                 return TRUE;
 952         case CONNMAN_SERVICE_STATE_DISCONNECT:
 953         case CONNMAN_SERVICE_STATE_FAILURE:
 954         case CONNMAN_SERVICE_STATE_READY:
 955         case CONNMAN_SERVICE_STATE_ONLINE:
 956                 break;
 957         }
 958
 959         return FALSE;
 960 }
 961
 962 static connman_bool_t explicit_connect(enum connman_session_reason reason)
 963 {
 964         switch (reason) {
 965         case CONNMAN_SESSION_REASON_UNKNOWN:
 966         case CONNMAN_SESSION_REASON_FREE_RIDE:
 967                 break;
 968         case CONNMAN_SESSION_REASON_CONNECT:
 969                 return TRUE;
 970         }
 971
 972         return FALSE;
 973 }
 974
 975 static connman_bool_t explicit_disconnect(struct session_info *info)
 976 {
 977         if (info->entry == NULL)
 978                 return FALSE;
 979
 980         DBG("reason %s service %p state %d",
 981                 reason2string(info->entry->reason),
 982                 info->entry->service, info->entry->state);
 983
 984         if (info->entry->reason == CONNMAN_SESSION_REASON_UNKNOWN)
 985                 return FALSE;
 986
 987         if (explicit_connect(info->entry->reason) == FALSE)
 988                 return FALSE;
 989
 990         if (__connman_service_session_dec(info->entry->service) == FALSE)
 991                 return FALSE;
 992
 993         return TRUE;
 994 }
 995
 996 struct pending_data {
 997         unsigned int timeout;
 998         struct service_entry *entry;
 999         gboolean (*cb)(gpointer);
1000 };
1001
1002 static void pending_timeout_free(gpointer data, gpointer user_data)
1003 {
1004         struct pending_data *pending = data;
1005
1006         DBG("pending %p timeout %d", pending, pending->timeout);
1007         g_source_remove(pending->timeout);
1008         g_free(pending);
1009 }
1010
1011 static void pending_timeout_remove_all(struct service_entry *entry)
1012 {
1013         DBG("");
1014
1015         g_slist_foreach(entry->pending_timeouts, pending_timeout_free, NULL);
1016         g_slist_free(entry->pending_timeouts);
1017         entry->pending_timeouts = NULL;
1018 }
1019
1020 static gboolean pending_timeout_cb(gpointer data)
1021 {
1022         struct pending_data *pending = data;
1023         struct service_entry *entry = pending->entry;
1024         gboolean ret;
1025
1026         DBG("pending %p timeout %d", pending, pending->timeout);
1027
1028         ret = pending->cb(pending->entry);
1029         if (ret == FALSE) {
1030                 entry->pending_timeouts =
1031                         g_slist_remove(entry->pending_timeouts,
1032                                         pending);
1033                 g_free(pending);
1034         }
1035         return ret;
1036 }
1037
1038 static connman_bool_t pending_timeout_add(unsigned int seconds,
1039                                         gboolean (*cb)(gpointer),
1040                                         struct service_entry *entry)
1041 {
1042         struct pending_data *pending = g_try_new0(struct pending_data, 1);
1043
1044         if (pending == NULL || cb == NULL || entry == NULL) {
1045                 g_free(pending);
1046                 return FALSE;
1047         }
1048
1049         pending->cb = cb;
1050         pending->entry = entry;
1051         pending->timeout = g_timeout_add_seconds(seconds, pending_timeout_cb,
1052                                                 pending);
1053         entry->pending_timeouts = g_slist_prepend(entry->pending_timeouts,
1054                                                 pending);
1055
1056         DBG("pending %p entry %p timeout id %d", pending, entry,
1057                 pending->timeout);
1058
1059         return TRUE;
1060 }
1061
1062 static gboolean call_disconnect(gpointer user_data)
1063 {
1064         struct service_entry *entry = user_data;
1065         struct connman_service *service = entry->service;
1066
1067         /*
1068          * TODO: We should mark this entry as pending work. In case
1069          * disconnect fails we just unassign this session from the
1070          * service and can't do anything later on it
1071          */
1072         DBG("disconnect service %p", service);
1073         __connman_service_disconnect(service);
1074
1075         return FALSE;
1076 }
1077
1078 static gboolean call_connect(gpointer user_data)
1079 {
1080         struct service_entry *entry = user_data;
1081         struct connman_service *service = entry->service;
1082
1083         DBG("connect service %p", service);
1084         __connman_service_connect(service);
1085
1086         return FALSE;
1087 }
1088
1089 static void deselect_service(struct session_info *info)
1090 {
1091         struct service_entry *entry;
1092         connman_bool_t disconnect, connected;
1093
1094         DBG("");
1095
1096         if (info->entry == NULL)
1097                 return;
1098
1099         disconnect = explicit_disconnect(info);
1100
1101         connected = is_connecting(info->entry->state) == TRUE ||
1102                         is_connected(info->entry->state) == TRUE;
1103
1104         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
1105         info->entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
1106
1107         entry = info->entry;
1108         info->entry = NULL;
1109
1110         DBG("disconnect %d connected %d", disconnect, connected);
1111
1112         if (disconnect == TRUE && connected == TRUE)
1113                 pending_timeout_add(0, call_disconnect, entry);
1114 }
1115
1116 static void deselect_and_disconnect(struct connman_session *session)
1117 {
1118         struct session_info *info = session->info;
1119
1120         deselect_service(info);
1121
1122         info->reason = CONNMAN_SESSION_REASON_FREE_RIDE;
1123 }
1124
1125 static void select_connected_service(struct session_info *info,
1126                                         struct service_entry *entry)
1127 {
1128         enum connman_session_state state;
1129
1130         state = service_to_session_state(entry->state);
1131         if (is_type_matching_state(&state, info->config.type) == FALSE)
1132                 return;
1133
1134         info->state = state;
1135
1136         info->entry = entry;
1137         info->entry->reason = info->reason;
1138
1139         if (explicit_connect(info->reason) == FALSE)
1140                 return;
1141
1142         __connman_service_session_inc(info->entry->service);
1143 }
1144
1145 static void select_offline_service(struct session_info *info,
1146                                         struct service_entry *entry)
1147 {
1148         if (explicit_connect(info->reason) == FALSE)
1149                 return;
1150
1151         info->state = service_to_session_state(entry->state);
1152
1153         info->entry = entry;
1154         info->entry->reason = info->reason;
1155
1156         __connman_service_session_inc(info->entry->service);
1157         pending_timeout_add(0, call_connect, entry);
1158 }
1159
1160 static void select_service(struct session_info *info,
1161                                 struct service_entry *entry)
1162 {
1163         DBG("service %p", entry->service);
1164
1165         if (is_connected(entry->state) == TRUE)
1166                 select_connected_service(info, entry);
1167         else
1168                 select_offline_service(info, entry);
1169 }
1170
1171 static void select_and_connect(struct connman_session *session,
1172                                 enum connman_session_reason reason)
1173 {
1174         struct session_info *info = session->info;
1175         struct service_entry *entry = NULL;
1176         GSequenceIter *iter;
1177
1178         DBG("session %p reason %s", session, reason2string(reason));
1179
1180         info->reason = reason;
1181
1182         iter = g_sequence_get_begin_iter(session->service_list);
1183
1184         while (g_sequence_iter_is_end(iter) == FALSE) {
1185                 entry = g_sequence_get(iter);
1186
1187                 switch (entry->state) {
1188                 case CONNMAN_SERVICE_STATE_ASSOCIATION:
1189                 case CONNMAN_SERVICE_STATE_CONFIGURATION:
1190                 case CONNMAN_SERVICE_STATE_READY:
1191                 case CONNMAN_SERVICE_STATE_ONLINE:
1192                 case CONNMAN_SERVICE_STATE_IDLE:
1193                 case CONNMAN_SERVICE_STATE_DISCONNECT:
1194                         select_service(info, entry);
1195                         return;
1196                 case CONNMAN_SERVICE_STATE_UNKNOWN:
1197                 case CONNMAN_SERVICE_STATE_FAILURE:
1198                         break;
1199                 }
1200
1201                 iter = g_sequence_iter_next(iter);
1202         }
1203 }
1204
1205 static struct service_entry *create_service_entry(struct connman_service *service,
1206                                         const char *name,
1207                                         enum connman_service_state state)
1208 {
1209         struct service_entry *entry;
1210         enum connman_service_type type;
1211         int idx;
1212
1213         entry = g_try_new0(struct service_entry, 1);
1214         if (entry == NULL)
1215                 return entry;
1216
1217         entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
1218         entry->state = state;
1219         if (name != NULL)
1220                 entry->name = name;
1221         else
1222                 entry->name = "";
1223         entry->service = service;
1224
1225         idx = __connman_service_get_index(entry->service);
1226         entry->ifname = connman_inet_ifname(idx);
1227         if (entry->ifname == NULL)
1228                 entry->ifname = g_strdup("");
1229
1230         type = connman_service_get_type(entry->service);
1231         entry->bearer = service2bearer(type);
1232
1233         return entry;
1234 }
1235
1236 static void destroy_service_entry(gpointer data)
1237 {
1238         struct service_entry *entry = data;
1239
1240         pending_timeout_remove_all(entry);
1241         g_free(entry->ifname);
1242
1243         g_free(entry);
1244 }
1245
1246 static void populate_service_list(struct connman_session *session)
1247 {
1248         struct service_entry *entry;
1249         GSequenceIter *iter;
1250
1251         session->service_hash =
1252                 g_hash_table_new_full(g_direct_hash, g_direct_equal,
1253                                         NULL, NULL);
1254         session->service_list = __connman_service_get_list(session,
1255                                                         service_match,
1256                                                         create_service_entry,
1257                                                         destroy_service_entry);
1258
1259         g_sequence_sort(session->service_list, sort_services, session);
1260
1261         iter = g_sequence_get_begin_iter(session->service_list);
1262
1263         while (g_sequence_iter_is_end(iter) == FALSE) {
1264                 entry = g_sequence_get(iter);
1265
1266                 DBG("service %p type %s name %s", entry->service,
1267                         service2bearer(connman_service_get_type(entry->service)),
1268                         entry->name);
1269
1270                 g_hash_table_replace(session->service_hash,
1271                                         entry->service, iter);
1272
1273                 iter = g_sequence_iter_next(iter);
1274         }
1275 }
1276
1277 static void session_changed(struct connman_session *session,
1278                                 enum connman_session_trigger trigger)
1279 {
1280         struct session_info *info = session->info;
1281         struct session_info *info_last = session->info_last;
1282         GSequenceIter *service_iter = NULL, *service_iter_last = NULL;
1283         GSequence *service_list_last;
1284         GHashTable *service_hash_last;
1285
1286         /*
1287          * TODO: This only a placeholder for the 'real' algorithm to
1288          * play a bit around. So we are going to improve it step by step.
1289          */
1290
1291         DBG("session %p trigger %s reason %s", session, trigger2string(trigger),
1292                                                 reason2string(info->reason));
1293
1294         if (info->entry != NULL) {
1295                 enum connman_session_state state;
1296
1297                 state = service_to_session_state(info->entry->state);
1298
1299                 if (is_type_matching_state(&state, info->config.type) == TRUE)
1300                         info->state = state;
1301         }
1302
1303         switch (trigger) {
1304         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
1305                 DBG("ignore session changed event");
1306                 return;
1307         case CONNMAN_SESSION_TRIGGER_SETTING:
1308                 if (info->config.allowed_bearers != info_last->config.allowed_bearers) {
1309
1310                         service_hash_last = session->service_hash;
1311                         service_list_last = session->service_list;
1312
1313                         populate_service_list(session);
1314
1315                         if (info->entry != NULL) {
1316                                 service_iter_last = g_hash_table_lookup(
1317                                                         service_hash_last,
1318                                                         info->entry->service);
1319                                 service_iter = g_hash_table_lookup(
1320                                                         session->service_hash,
1321                                                         info->entry->service);
1322                         }
1323
1324                         if (service_iter == NULL && service_iter_last != NULL) {
1325                                 /*
1326                                  * The currently selected service is
1327                                  * not part of this session anymore.
1328                                  */
1329                                 deselect_and_disconnect(session);
1330                         }
1331
1332                         g_hash_table_remove_all(service_hash_last);
1333                         g_sequence_free(service_list_last);
1334                 }
1335
1336                 if (info->config.type != info_last->config.type) {
1337                         if (info->state >= CONNMAN_SESSION_STATE_CONNECTED &&
1338                                         is_type_matching_state(&info->state,
1339                                                         info->config.type) == FALSE)
1340                                 deselect_and_disconnect(session);
1341                 }
1342
1343                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED) {
1344                         select_and_connect(session,
1345                                         CONNMAN_SESSION_REASON_FREE_RIDE);
1346                 }
1347
1348                 break;
1349         case CONNMAN_SESSION_TRIGGER_ECALL:
1350                 /*
1351                  * For the time beeing we fallback to normal connect
1352                  * strategy.
1353                  */
1354         case CONNMAN_SESSION_TRIGGER_CONNECT:
1355                 if (info->state >= CONNMAN_SESSION_STATE_CONNECTED) {
1356                         if (info->entry->reason == CONNMAN_SESSION_REASON_CONNECT)
1357                                 break;
1358                         info->entry->reason = CONNMAN_SESSION_REASON_CONNECT;
1359                         __connman_service_session_inc(info->entry->service);
1360                         break;
1361                 }
1362
1363                 if (info->entry != NULL &&
1364                                 is_connecting(info->entry->state) == TRUE) {
1365                         break;
1366                 }
1367
1368                 select_and_connect(session,
1369                                 CONNMAN_SESSION_REASON_CONNECT);
1370
1371                 break;
1372         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
1373                 deselect_and_disconnect(session);
1374
1375                 break;
1376         case CONNMAN_SESSION_TRIGGER_SERVICE:
1377                 if (info->entry != NULL &&
1378                         (is_connecting(info->entry->state) == TRUE ||
1379                                 is_connected(info->entry->state) == TRUE)) {
1380                         break;
1381                 }
1382
1383                 deselect_and_disconnect(session);
1384
1385                 if (info->reason == CONNMAN_SESSION_REASON_FREE_RIDE) {
1386                         select_and_connect(session, info->reason);
1387                 }
1388
1389                 break;
1390         }
1391
1392         session_notify(session);
1393 }
1394
1395 static DBusMessage *connect_session(DBusConnection *conn,
1396                                         DBusMessage *msg, void *user_data)
1397 {
1398         struct connman_session *session = user_data;
1399
1400         DBG("session %p", session);
1401
1402         if (ecall_session != NULL) {
1403                 if (ecall_session->ecall == TRUE && ecall_session != session)
1404                         return __connman_error_failed(msg, EBUSY);
1405
1406                 session->ecall = TRUE;
1407                 session_changed(session, CONNMAN_SESSION_TRIGGER_ECALL);
1408         } else
1409                 session_changed(session, CONNMAN_SESSION_TRIGGER_CONNECT);
1410
1411         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1412 }
1413
1414 static DBusMessage *disconnect_session(DBusConnection *conn,
1415                                         DBusMessage *msg, void *user_data)
1416 {
1417         struct connman_session *session = user_data;
1418
1419         DBG("session %p", session);
1420
1421         if (ecall_session != NULL) {
1422                 if (ecall_session->ecall == TRUE && ecall_session != session)
1423                         return __connman_error_failed(msg, EBUSY);
1424
1425                 session->ecall = FALSE;
1426         }
1427
1428         session_changed(session, CONNMAN_SESSION_TRIGGER_DISCONNECT);
1429
1430         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1431 }
1432
1433 static DBusMessage *change_session(DBusConnection *conn,
1434                                         DBusMessage *msg, void *user_data)
1435 {
1436         struct connman_session *session = user_data;
1437         struct session_info *info = session->info;
1438         DBusMessageIter iter, value;
1439         const char *name;
1440         const char *val;
1441         GSList *allowed_bearers;
1442         int err;
1443
1444         DBG("session %p", session);
1445         if (dbus_message_iter_init(msg, &iter) == FALSE)
1446                 return __connman_error_invalid_arguments(msg);
1447
1448         if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
1449                 return __connman_error_invalid_arguments(msg);
1450
1451         dbus_message_iter_get_basic(&iter, &name);
1452         dbus_message_iter_next(&iter);
1453
1454         if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1455                 return __connman_error_invalid_arguments(msg);
1456
1457         dbus_message_iter_recurse(&iter, &value);
1458
1459         switch (dbus_message_iter_get_arg_type(&value)) {
1460         case DBUS_TYPE_ARRAY:
1461                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
1462                         err = parse_bearers(&value, &allowed_bearers);
1463                         if (err < 0)
1464                                 return __connman_error_failed(msg, err);
1465
1466                         connman_session_free_bearers(info->config.allowed_bearers);
1467                         err = apply_policy_on_bearers(
1468                                         session->policy_config->allowed_bearers,
1469                                         allowed_bearers,
1470                                         &info->config.allowed_bearers);
1471
1472                         connman_session_free_bearers(allowed_bearers);
1473                         if (err < 0)
1474                                 return __connman_error_failed(msg, err);
1475                 } else {
1476                         goto err;
1477                 }
1478                 break;
1479         case DBUS_TYPE_STRING:
1480                 if (g_str_equal(name, "ConnectionType") == TRUE) {
1481                         dbus_message_iter_get_basic(&value, &val);
1482                         info->config.type = apply_policy_on_type(
1483                                 session->policy_config->type,
1484                                 string2type(val));
1485                 } else {
1486                         goto err;
1487                 }
1488                 break;
1489         default:
1490                 goto err;
1491         }
1492
1493         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1494
1495         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1496
1497 err:
1498         return __connman_error_invalid_arguments(msg);
1499 }
1500
1501 static void release_session(gpointer key, gpointer value, gpointer user_data)
1502 {
1503         struct connman_session *session = value;
1504         DBusMessage *message;
1505
1506         DBG("owner %s path %s", session->owner, session->notify_path);
1507
1508         if (session->notify_watch > 0)
1509                 g_dbus_remove_watch(connection, session->notify_watch);
1510
1511         g_dbus_unregister_interface(connection, session->session_path,
1512                                                 CONNMAN_SESSION_INTERFACE);
1513
1514         message = dbus_message_new_method_call(session->owner,
1515                                                 session->notify_path,
1516                                                 CONNMAN_NOTIFICATION_INTERFACE,
1517                                                 "Release");
1518         if (message == NULL)
1519                 return;
1520
1521         dbus_message_set_no_reply(message, TRUE);
1522
1523         g_dbus_send_message(connection, message);
1524 }
1525
1526 static int session_disconnect(struct connman_session *session)
1527 {
1528         DBG("session %p, %s", session, session->owner);
1529
1530         if (session->notify_watch > 0)
1531                 g_dbus_remove_watch(connection, session->notify_watch);
1532
1533         g_dbus_unregister_interface(connection, session->session_path,
1534                                                 CONNMAN_SESSION_INTERFACE);
1535
1536         deselect_and_disconnect(session);
1537
1538         g_hash_table_remove(session_hash, session->session_path);
1539
1540         return 0;
1541 }
1542
1543 static void owner_disconnect(DBusConnection *conn, void *user_data)
1544 {
1545         struct connman_session *session = user_data;
1546
1547         DBG("session %p, %s died", session, session->owner);
1548
1549         session_disconnect(session);
1550 }
1551
1552 static DBusMessage *destroy_session(DBusConnection *conn,
1553                                         DBusMessage *msg, void *user_data)
1554 {
1555         struct connman_session *session = user_data;
1556
1557         DBG("session %p", session);
1558
1559         if (ecall_session != NULL && ecall_session != session)
1560                 return __connman_error_failed(msg, EBUSY);
1561
1562         session_disconnect(session);
1563
1564         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1565 }
1566
1567 static const GDBusMethodTable session_methods[] = {
1568         { GDBUS_METHOD("Destroy", NULL, NULL, destroy_session) },
1569         { GDBUS_METHOD("Connect", NULL, NULL, connect_session) },
1570         { GDBUS_METHOD("Disconnect", NULL, NULL,
1571                         disconnect_session ) },
1572         { GDBUS_METHOD("Change",
1573                         GDBUS_ARGS({ "name", "s" }, { "value", "v" }),
1574                         NULL, change_session) },
1575         { },
1576 };
1577
1578 static void session_create_cb(struct connman_session *session,
1579                                 struct connman_session_config *config,
1580                                 void *user_data, int err)
1581 {
1582         DBG("session %p config %p", session, config);
1583
1584         if (err != 0)
1585                 return;
1586
1587         session->policy_config = config;
1588 }
1589
1590 int __connman_session_create(DBusMessage *msg)
1591 {
1592         const char *owner, *notify_path;
1593         char *session_path = NULL;
1594         DBusMessageIter iter, array;
1595         struct connman_session *session = NULL;
1596         struct session_info *info, *info_last;
1597         enum connman_session_type type = CONNMAN_SESSION_TYPE_ANY;
1598         GSList *allowed_bearers = NULL;
1599         connman_bool_t allowed_bearers_valid = FALSE;
1600         connman_bool_t type_valid = FALSE;
1601         int err;
1602
1603         owner = dbus_message_get_sender(msg);
1604
1605         DBG("owner %s", owner);
1606
1607         if (ecall_session != NULL && ecall_session->ecall == TRUE) {
1608                 /*
1609                  * If there is an emergency call already going on,
1610                  * ignore session creation attempt
1611                  */
1612                 err = -EBUSY;
1613                 goto err;
1614         }
1615
1616         dbus_message_iter_init(msg, &iter);
1617         dbus_message_iter_recurse(&iter, &array);
1618
1619         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1620                 DBusMessageIter entry, value;
1621                 const char *key, *val;
1622
1623                 dbus_message_iter_recurse(&array, &entry);
1624                 dbus_message_iter_get_basic(&entry, &key);
1625
1626                 dbus_message_iter_next(&entry);
1627                 dbus_message_iter_recurse(&entry, &value);
1628
1629                 switch (dbus_message_iter_get_arg_type(&value)) {
1630                 case DBUS_TYPE_ARRAY:
1631                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
1632                                 err = parse_bearers(&value, &allowed_bearers);
1633                                 if (err < 0)
1634                                         goto err;
1635
1636                                 allowed_bearers_valid = TRUE;
1637                         } else {
1638                                 return -EINVAL;
1639                         }
1640                         break;
1641                 case DBUS_TYPE_STRING:
1642                         if (g_str_equal(key, "ConnectionType") == TRUE) {
1643                                 dbus_message_iter_get_basic(&value, &val);
1644                                 type = string2type(val);
1645                                 type_valid = TRUE;
1646                         } else {
1647                                 return -EINVAL;
1648                         }
1649                 }
1650                 dbus_message_iter_next(&array);
1651         }
1652
1653         dbus_message_iter_next(&iter);
1654         dbus_message_iter_get_basic(&iter, &notify_path);
1655
1656         if (notify_path == NULL) {
1657                 err = -EINVAL;
1658                 goto err;
1659         }
1660
1661         session_path = g_strdup_printf("/sessions%s", notify_path);
1662         if (session_path == NULL) {
1663                 err = -ENOMEM;
1664                 goto err;
1665         }
1666
1667         session = g_hash_table_lookup(session_hash, session_path);
1668         if (session != NULL) {
1669                 session = NULL;
1670                 err = -EEXIST;
1671                 goto err;
1672         }
1673
1674         session = g_try_new0(struct connman_session, 1);
1675         if (session == NULL) {
1676                 err = -ENOMEM;
1677                 goto err;
1678         }
1679
1680         session->info = g_try_new0(struct session_info, 1);
1681         if (session->info == NULL) {
1682                 err = -ENOMEM;
1683                 goto err;
1684         }
1685
1686         session->info_last = g_try_new0(struct session_info, 1);
1687         if (session->info_last == NULL) {
1688                 err = -ENOMEM;
1689                 goto err;
1690         }
1691
1692         info = session->info;
1693         info_last = session->info_last;
1694
1695         session->owner = g_strdup(owner);
1696         session->session_path = session_path;
1697         session->notify_path = g_strdup(notify_path);
1698         session->notify_watch =
1699                 g_dbus_add_disconnect_watch(connection, session->owner,
1700                                         owner_disconnect, session, NULL);
1701
1702         err = assign_policy_plugin(session);
1703         if (err < 0)
1704                 goto err;
1705         err = create_policy_config(session, session_create_cb, NULL);
1706         if (err < 0)
1707                 goto err;
1708
1709         if (session->policy_config->ecall == TRUE)
1710                 ecall_session = session;
1711
1712         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
1713         if (type_valid == FALSE)
1714                 type = CONNMAN_SESSION_TYPE_ANY;
1715         info->config.type = apply_policy_on_type(
1716                                 session->policy_config->type,
1717                                 type);
1718         info->config.priority = session->policy_config->priority;
1719         info->config.roaming_policy = session->policy_config->roaming_policy;
1720         info->entry = NULL;
1721
1722         if (allowed_bearers_valid == FALSE) {
1723                 allowed_bearers = connman_session_allowed_bearers_any();
1724                 if (allowed_bearers == NULL) {
1725                         err = -ENOMEM;
1726                         goto err;
1727                 }
1728         }
1729
1730         err = apply_policy_on_bearers(
1731                         session->policy_config->allowed_bearers,
1732                         allowed_bearers,
1733                         &info->config.allowed_bearers);
1734         if (err < 0)
1735                 goto err;
1736
1737         g_hash_table_replace(session_hash, session->session_path, session);
1738
1739         DBG("add %s", session->session_path);
1740
1741         if (g_dbus_register_interface(connection, session->session_path,
1742                                         CONNMAN_SESSION_INTERFACE,
1743                                         session_methods, NULL,
1744                                         NULL, session, NULL) == FALSE) {
1745                 connman_error("Failed to register %s", session->session_path);
1746                 g_hash_table_remove(session_hash, session->session_path);
1747                 session = NULL;
1748
1749                 err = -EINVAL;
1750                 goto err;
1751         }
1752
1753         g_dbus_send_reply(connection, msg,
1754                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1755                                 DBUS_TYPE_INVALID);
1756
1757
1758         populate_service_list(session);
1759
1760         info_last->state = info->state;
1761         info_last->config.priority = info->config.priority;
1762         info_last->config.roaming_policy = info->config.roaming_policy;
1763         info_last->entry = info->entry;
1764         info_last->config.allowed_bearers = info->config.allowed_bearers;
1765
1766         session->append_all = TRUE;
1767
1768         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1769
1770         return 0;
1771
1772 err:
1773         connman_error("Failed to create session");
1774
1775         if (session != NULL) {
1776                 if (session->info_last != NULL)
1777                         g_free(session->info_last);
1778                 if (session->info != NULL)
1779                         g_free(session->info);
1780                 g_free(session);
1781         }
1782
1783         g_free(session_path);
1784
1785         connman_session_free_bearers(allowed_bearers);
1786
1787         return err;
1788 }
1789
1790 int __connman_session_destroy(DBusMessage *msg)
1791 {
1792         const char *owner, *session_path;
1793         struct connman_session *session;
1794
1795         owner = dbus_message_get_sender(msg);
1796
1797         DBG("owner %s", owner);
1798
1799         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1800                                                         DBUS_TYPE_INVALID);
1801         if (session_path == NULL)
1802                 return -EINVAL;
1803
1804         session = g_hash_table_lookup(session_hash, session_path);
1805         if (session == NULL)
1806                 return -EINVAL;
1807
1808         if (g_strcmp0(owner, session->owner) != 0)
1809                 return -EACCES;
1810
1811         session_disconnect(session);
1812
1813         return 0;
1814 }
1815
1816 connman_bool_t __connman_session_mode()
1817 {
1818         return sessionmode;
1819 }
1820
1821 void __connman_session_set_mode(connman_bool_t enable)
1822 {
1823         DBG("enable %d", enable);
1824
1825         if (sessionmode != enable) {
1826                 sessionmode = enable;
1827
1828                 connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
1829                                 CONNMAN_MANAGER_INTERFACE, "SessionMode",
1830                                 DBUS_TYPE_BOOLEAN, &sessionmode);
1831         }
1832
1833         if (sessionmode == TRUE)
1834                 __connman_service_disconnect_all();
1835 }
1836
1837 static void service_add(struct connman_service *service,
1838                         const char *name)
1839 {
1840         GHashTableIter iter;
1841         GSequenceIter *iter_service_list;
1842         gpointer key, value;
1843         struct connman_session *session;
1844         struct service_entry *entry;
1845
1846         DBG("service %p", service);
1847
1848         g_hash_table_iter_init(&iter, session_hash);
1849
1850         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1851                 session = value;
1852
1853                 if (service_match(session, service) == FALSE)
1854                         continue;
1855
1856                 entry = create_service_entry(service, name,
1857                                                 CONNMAN_SERVICE_STATE_IDLE);
1858                 if (entry == NULL)
1859                         continue;
1860
1861                 iter_service_list =
1862                         g_sequence_insert_sorted(session->service_list,
1863                                                         entry, sort_services,
1864                                                         session);
1865
1866                 g_hash_table_replace(session->service_hash, service,
1867                                         iter_service_list);
1868
1869                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1870         }
1871 }
1872
1873 static void service_remove(struct connman_service *service)
1874 {
1875
1876         GHashTableIter iter;
1877         gpointer key, value;
1878         struct connman_session *session;
1879         struct session_info *info;
1880
1881         DBG("service %p", service);
1882
1883         g_hash_table_iter_init(&iter, session_hash);
1884
1885         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1886                 GSequenceIter *seq_iter;
1887                 session = value;
1888                 info = session->info;
1889
1890                 seq_iter = g_hash_table_lookup(session->service_hash, service);
1891                 if (seq_iter == NULL)
1892                         continue;
1893
1894                 g_sequence_remove(seq_iter);
1895
1896                 if (info->entry != NULL && info->entry->service == service)
1897                         info->entry = NULL;
1898                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1899         }
1900 }
1901
1902 static void service_state_changed(struct connman_service *service,
1903                                         enum connman_service_state state)
1904 {
1905         GHashTableIter iter;
1906         gpointer key, value;
1907
1908         DBG("service %p state %d", service, state);
1909
1910         g_hash_table_iter_init(&iter, session_hash);
1911
1912         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1913                 struct connman_session *session = value;
1914                 GSequenceIter *service_iter;
1915
1916                 service_iter = g_hash_table_lookup(session->service_hash, service);
1917                 if (service_iter != NULL) {
1918                         struct service_entry *entry;
1919
1920                         entry = g_sequence_get(service_iter);
1921                         entry->state = state;
1922                 }
1923
1924                 session_changed(session,
1925                                 CONNMAN_SESSION_TRIGGER_SERVICE);
1926         }
1927 }
1928
1929 static void ipconfig_changed(struct connman_service *service,
1930                                 struct connman_ipconfig *ipconfig)
1931 {
1932         GHashTableIter iter;
1933         gpointer key, value;
1934         struct connman_session *session;
1935         struct session_info *info;
1936         enum connman_ipconfig_type type;
1937
1938         DBG("service %p ipconfig %p", service, ipconfig);
1939
1940         type = __connman_ipconfig_get_config_type(ipconfig);
1941
1942         g_hash_table_iter_init(&iter, session_hash);
1943
1944         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1945                 session = value;
1946                 info = session->info;
1947
1948                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED)
1949                         continue;
1950
1951                 if (info->entry != NULL && info->entry->service == service) {
1952                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
1953                                 ipconfig_ipv4_changed(session);
1954                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
1955                                 ipconfig_ipv6_changed(session);
1956                 }
1957         }
1958 }
1959
1960 static struct connman_notifier session_notifier = {
1961         .name                   = "session",
1962         .service_add            = service_add,
1963         .service_remove         = service_remove,
1964         .service_state_changed  = service_state_changed,
1965         .ipconfig_changed       = ipconfig_changed,
1966 };
1967
1968 int __connman_session_init(void)
1969 {
1970         int err;
1971
1972         DBG("");
1973
1974         connection = connman_dbus_get_connection();
1975         if (connection == NULL)
1976                 return -1;
1977
1978         err = connman_notifier_register(&session_notifier);
1979         if (err < 0) {
1980                 dbus_connection_unref(connection);
1981                 return err;
1982         }
1983
1984         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
1985                                                 NULL, cleanup_session);
1986
1987         sessionmode = FALSE;
1988         return 0;
1989 }
1990
1991 void __connman_session_cleanup(void)
1992 {
1993         DBG("");
1994
1995         if (connection == NULL)
1996                 return;
1997
1998         connman_notifier_unregister(&session_notifier);
1999
2000         g_hash_table_foreach(session_hash, release_session, NULL);
2001         g_hash_table_destroy(session_hash);
2002         session_hash = NULL;
2003
2004         dbus_connection_unref(connection);
2005 }