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