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.h"
  32
  33 static DBusConnection *connection;
  34 static GHashTable *session_hash;
  35 static connman_bool_t sessionmode;
  36 static struct session_info *ecall_info;
  37
  38 enum connman_session_trigger {
  39         CONNMAN_SESSION_TRIGGER_UNKNOWN         = 0,
  40         CONNMAN_SESSION_TRIGGER_SETTING         = 1,
  41         CONNMAN_SESSION_TRIGGER_CONNECT         = 2,
  42         CONNMAN_SESSION_TRIGGER_DISCONNECT      = 3,
  43         CONNMAN_SESSION_TRIGGER_SERVICE         = 4,
  44         CONNMAN_SESSION_TRIGGER_ECALL           = 5,
  45 };
  46
  47 enum connman_session_reason {
  48         CONNMAN_SESSION_REASON_UNKNOWN          = 0,
  49         CONNMAN_SESSION_REASON_CONNECT          = 1,
  50         CONNMAN_SESSION_REASON_DISCONNECT       = 2,
  51         CONNMAN_SESSION_REASON_FREE_RIDE        = 3,
  52 };
  53
  54 enum connman_session_state {
  55         CONNMAN_SESSION_STATE_DISCONNECTED   = 0,
  56         CONNMAN_SESSION_STATE_CONNECTED      = 1,
  57         CONNMAN_SESSION_STATE_ONLINE         = 2,
  58 };
  59
  60 enum connman_session_type {
  61         CONNMAN_SESSION_TYPE_ANY      = 0,
  62         CONNMAN_SESSION_TYPE_LOCAL    = 1,
  63         CONNMAN_SESSION_TYPE_INTERNET = 2,
  64 };
  65
  66 enum connman_session_roaming_policy {
  67         CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN          = 0,
  68         CONNMAN_SESSION_ROAMING_POLICY_DEFAULT          = 1,
  69         CONNMAN_SESSION_ROAMING_POLICY_ALWAYS           = 2,
  70         CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN        = 3,
  71         CONNMAN_SESSION_ROAMING_POLICY_NATIONAL         = 4,
  72         CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL    = 5,
  73 };
  74
  75 struct service_entry {
  76         /* track why this service was selected */
  77         enum connman_session_reason reason;
  78         enum connman_service_state state;
  79         const char *name;
  80         struct connman_service *service;
  81         char *ifname;
  82         const char *bearer;
  83         GSList *pending_timeouts;
  84 };
  85
  86 struct session_info {
  87         enum connman_session_state state;
  88         enum connman_session_type type;
  89         connman_bool_t priority;
  90         GSList *allowed_bearers;
  91         connman_bool_t avoid_handover;
  92         connman_bool_t stay_connected;
  93         connman_bool_t ecall;
  94         enum connman_session_roaming_policy roaming_policy;
  95
  96         struct service_entry *entry;
  97         enum connman_session_reason reason;
  98 };
  99
 100 struct connman_session {
 101         char *owner;
 102         char *session_path;
 103         char *notify_path;
 104         guint notify_watch;
 105
 106         connman_bool_t append_all;
 107         struct session_info *info;
 108         struct session_info *info_last;
 109
 110         GSequence *service_list;
 111         GHashTable *service_hash;
 112 };
 113
 114 struct bearer_info {
 115         char *name;
 116         connman_bool_t match_all;
 117         enum connman_service_type service_type;
 118 };
 119
 120 static const char *trigger2string(enum connman_session_trigger trigger)
 121 {
 122         switch (trigger) {
 123         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
 124                 break;
 125         case CONNMAN_SESSION_TRIGGER_SETTING:
 126                 return "setting";
 127         case CONNMAN_SESSION_TRIGGER_CONNECT:
 128                 return "connect";
 129         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
 130                 return "disconnect";
 131         case CONNMAN_SESSION_TRIGGER_SERVICE:
 132                 return "service";
 133         case CONNMAN_SESSION_TRIGGER_ECALL:
 134                 return "ecall";
 135         }
 136
 137         return NULL;
 138 }
 139
 140 static const char *reason2string(enum connman_session_reason reason)
 141 {
 142         switch (reason) {
 143         case CONNMAN_SESSION_REASON_UNKNOWN:
 144                 return "unknown";
 145         case CONNMAN_SESSION_REASON_CONNECT:
 146                 return "connect";
 147         case CONNMAN_SESSION_REASON_DISCONNECT:
 148                 return "disconnect";
 149         case CONNMAN_SESSION_REASON_FREE_RIDE:
 150                 return "free-ride";
 151         }
 152
 153         return NULL;
 154 }
 155
 156 static const char *state2string(enum connman_session_state state)
 157 {
 158         switch (state) {
 159         case CONNMAN_SESSION_STATE_DISCONNECTED:
 160                 return "disconnected";
 161         case CONNMAN_SESSION_STATE_CONNECTED:
 162                 return "connected";
 163         case CONNMAN_SESSION_STATE_ONLINE:
 164                 return "online";
 165         }
 166
 167         return NULL;
 168 }
 169
 170 static const char *type2string(enum connman_session_type type)
 171 {
 172         switch (type) {
 173         case CONNMAN_SESSION_TYPE_ANY:
 174                 return "";
 175         case CONNMAN_SESSION_TYPE_LOCAL:
 176                 return "local";
 177         case CONNMAN_SESSION_TYPE_INTERNET:
 178                 return "internet";
 179         }
 180
 181         return NULL;
 182 }
 183
 184 static enum connman_session_type string2type(const char *type)
 185 {
 186         if (g_strcmp0(type, "local") == 0)
 187                 return CONNMAN_SESSION_TYPE_LOCAL;
 188         else if (g_strcmp0(type, "internet") == 0)
 189                 return CONNMAN_SESSION_TYPE_INTERNET;
 190
 191         return CONNMAN_SESSION_TYPE_ANY;
 192 }
 193
 194 static const char *roamingpolicy2string(enum connman_session_roaming_policy policy)
 195 {
 196         switch (policy) {
 197         case CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN:
 198                 return "unknown";
 199         case CONNMAN_SESSION_ROAMING_POLICY_DEFAULT:
 200                 return "default";
 201         case CONNMAN_SESSION_ROAMING_POLICY_ALWAYS:
 202                 return "always";
 203         case CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN:
 204                 return "forbidden";
 205         case CONNMAN_SESSION_ROAMING_POLICY_NATIONAL:
 206                 return "national";
 207         case CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL:
 208                 return "international";
 209         }
 210
 211         return NULL;
 212 }
 213
 214 static enum connman_session_roaming_policy string2roamingpolicy(const char *policy)
 215 {
 216         if (g_strcmp0(policy, "default") == 0)
 217                 return CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 218         else if (g_strcmp0(policy, "always") == 0)
 219                 return CONNMAN_SESSION_ROAMING_POLICY_ALWAYS;
 220         else if (g_strcmp0(policy, "forbidden") == 0)
 221                 return CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
 222         else if (g_strcmp0(policy, "national") == 0)
 223                 return CONNMAN_SESSION_ROAMING_POLICY_NATIONAL;
 224         else if (g_strcmp0(policy, "international") == 0)
 225                 return CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL;
 226         else
 227                 return CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN;
 228 }
 229
 230 static enum connman_service_type bearer2service(const char *bearer)
 231 {
 232         if (bearer == NULL)
 233                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 234
 235         if (g_strcmp0(bearer, "ethernet") == 0)
 236                 return CONNMAN_SERVICE_TYPE_ETHERNET;
 237         else if (g_strcmp0(bearer, "wifi") == 0)
 238                 return CONNMAN_SERVICE_TYPE_WIFI;
 239         else if (g_strcmp0(bearer, "wimax") == 0)
 240                 return CONNMAN_SERVICE_TYPE_WIMAX;
 241         else if (g_strcmp0(bearer, "bluetooth") == 0)
 242                 return CONNMAN_SERVICE_TYPE_BLUETOOTH;
 243         else if (g_strcmp0(bearer, "cellular") == 0)
 244                 return CONNMAN_SERVICE_TYPE_CELLULAR;
 245         else if (g_strcmp0(bearer, "vpn") == 0)
 246                 return CONNMAN_SERVICE_TYPE_VPN;
 247         else
 248                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 249 }
 250
 251 static char *service2bearer(enum connman_service_type type)
 252 {
 253         switch (type) {
 254         case CONNMAN_SERVICE_TYPE_ETHERNET:
 255                 return "ethernet";
 256         case CONNMAN_SERVICE_TYPE_WIFI:
 257                 return "wifi";
 258         case CONNMAN_SERVICE_TYPE_WIMAX:
 259                 return "wimax";
 260         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 261                 return "bluetooth";
 262         case CONNMAN_SERVICE_TYPE_CELLULAR:
 263                 return "cellular";
 264         case CONNMAN_SERVICE_TYPE_VPN:
 265                 return "vpn";
 266         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 267         case CONNMAN_SERVICE_TYPE_SYSTEM:
 268         case CONNMAN_SERVICE_TYPE_GPS:
 269         case CONNMAN_SERVICE_TYPE_GADGET:
 270                 return "";
 271         }
 272
 273         return "";
 274 }
 275
 276 static void cleanup_bearer_info(gpointer data, gpointer user_data)
 277 {
 278         struct bearer_info *info = data;
 279
 280         g_free(info->name);
 281         g_free(info);
 282 }
 283
 284 static GSList *session_parse_allowed_bearers(DBusMessageIter *iter)
 285 {
 286         struct bearer_info *info;
 287         DBusMessageIter array;
 288         GSList *list = NULL;
 289
 290         dbus_message_iter_recurse(iter, &array);
 291
 292         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_STRING) {
 293                 char *bearer = NULL;
 294
 295                 dbus_message_iter_get_basic(&array, &bearer);
 296
 297                 info = g_try_new0(struct bearer_info, 1);
 298                 if (info == NULL) {
 299                         g_slist_foreach(list, cleanup_bearer_info, NULL);
 300                         g_slist_free(list);
 301
 302                         return NULL;
 303                 }
 304
 305                 info->name = g_strdup(bearer);
 306                 info->service_type = bearer2service(info->name);
 307
 308                 if (info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN &&
 309                                 g_strcmp0(info->name, "*") == 0) {
 310                         info->match_all = TRUE;
 311                 } else {
 312                         info->match_all = FALSE;
 313                 }
 314
 315                 list = g_slist_append(list, info);
 316
 317                 dbus_message_iter_next(&array);
 318         }
 319
 320         return list;
 321 }
 322
 323 static GSList *session_allowed_bearers_any(void)
 324 {
 325         struct bearer_info *info;
 326         GSList *list = NULL;
 327
 328         info = g_try_new0(struct bearer_info, 1);
 329         if (info == NULL) {
 330                 g_slist_free(list);
 331
 332                 return NULL;
 333         }
 334
 335         info->name = g_strdup("");
 336         info->match_all = TRUE;
 337         info->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 338
 339         list = g_slist_append(list, info);
 340
 341         return list;
 342 }
 343
 344 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 345 {
 346         struct session_info *info = user_data;
 347         GSList *list;
 348
 349         for (list = info->allowed_bearers;
 350                         list != NULL; list = list->next) {
 351                 struct bearer_info *bearer_info = list->data;
 352
 353                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 354                                                 &bearer_info->name);
 355         }
 356 }
 357
 358 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 359 {
 360         struct connman_service *service = user_data;
 361         struct connman_ipconfig *ipconfig_ipv4;
 362
 363         if (service == NULL)
 364                 return;
 365
 366         if (__connman_service_is_connected_state(service,
 367                                 CONNMAN_IPCONFIG_TYPE_IPV4) == FALSE) {
 368                 return;
 369         }
 370
 371         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 372         if (ipconfig_ipv4 == NULL)
 373                 return;
 374
 375         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 376 }
 377
 378 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 379 {
 380         struct connman_service *service = user_data;
 381         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 382
 383         if (service == NULL)
 384                 return;
 385
 386         if (__connman_service_is_connected_state(service,
 387                                 CONNMAN_IPCONFIG_TYPE_IPV6) == FALSE) {
 388                 return;
 389         }
 390
 391         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 392         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 393         if (ipconfig_ipv6 == NULL)
 394                 return;
 395
 396         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 397 }
 398
 399 static void append_notify(DBusMessageIter *dict,
 400                                         struct connman_session *session)
 401 {
 402         struct session_info *info = session->info;
 403         struct session_info *info_last = session->info_last;
 404         const char *policy;
 405         struct connman_service *service;
 406         const char *name, *ifname, *bearer;
 407
 408         if (session->append_all == TRUE ||
 409                         info->state != info_last->state) {
 410                 const char *state = state2string(info->state);
 411
 412                 connman_dbus_dict_append_basic(dict, "State",
 413                                                 DBUS_TYPE_STRING,
 414                                                 &state);
 415                 info_last->state = info->state;
 416         }
 417
 418         if (session->append_all == TRUE ||
 419                         info->entry != info_last->entry) {
 420                 if (info->entry == NULL) {
 421                         name = "";
 422                         ifname = "";
 423                         service = NULL;
 424                         bearer = "";
 425                 } else {
 426                         name = info->entry->name;
 427                         ifname = info->entry->ifname;
 428                         service = info->entry->service;
 429                         bearer = info->entry->bearer;
 430                 }
 431
 432                 connman_dbus_dict_append_basic(dict, "Name",
 433                                                 DBUS_TYPE_STRING,
 434                                                 &name);
 435
 436                 connman_dbus_dict_append_dict(dict, "IPv4",
 437                                                 append_ipconfig_ipv4,
 438                                                 service);
 439
 440                 connman_dbus_dict_append_dict(dict, "IPv6",
 441                                                 append_ipconfig_ipv6,
 442                                                 service);
 443
 444                 connman_dbus_dict_append_basic(dict, "Interface",
 445                                                 DBUS_TYPE_STRING,
 446                                                 &ifname);
 447
 448                 connman_dbus_dict_append_basic(dict, "Bearer",
 449                                                 DBUS_TYPE_STRING,
 450                                                 &bearer);
 451
 452                 info_last->entry = info->entry;
 453         }
 454
 455         if (session->append_all == TRUE || info->type != info_last->type) {
 456                 const char *type = type2string(info->type);
 457
 458                 connman_dbus_dict_append_basic(dict, "ConnectionType",
 459                                                 DBUS_TYPE_STRING,
 460                                                 &type);
 461                 info_last->type = info->type;
 462         }
 463
 464         if (session->append_all == TRUE ||
 465                         info->priority != info_last->priority) {
 466                 connman_dbus_dict_append_basic(dict, "Priority",
 467                                                 DBUS_TYPE_BOOLEAN,
 468                                                 &info->priority);
 469                 info_last->priority = info->priority;
 470         }
 471
 472         if (session->append_all == TRUE ||
 473                         info->allowed_bearers != info_last->allowed_bearers) {
 474                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 475                                                 DBUS_TYPE_STRING,
 476                                                 append_allowed_bearers,
 477                                                 info);
 478                 info_last->allowed_bearers = info->allowed_bearers;
 479         }
 480
 481         if (session->append_all == TRUE ||
 482                         info->avoid_handover != info_last->avoid_handover) {
 483                 connman_dbus_dict_append_basic(dict, "AvoidHandover",
 484                                                 DBUS_TYPE_BOOLEAN,
 485                                                 &info->avoid_handover);
 486                 info_last->avoid_handover = info->avoid_handover;
 487         }
 488
 489         if (session->append_all == TRUE ||
 490                         info->stay_connected != info_last->stay_connected) {
 491                 connman_dbus_dict_append_basic(dict, "StayConnected",
 492                                                 DBUS_TYPE_BOOLEAN,
 493                                                 &info->stay_connected);
 494                 info_last->stay_connected = info->stay_connected;
 495         }
 496
 497         if (session->append_all == TRUE ||
 498                         info->ecall != info_last->ecall) {
 499                 connman_dbus_dict_append_basic(dict, "EmergencyCall",
 500                                                 DBUS_TYPE_BOOLEAN,
 501                                                 &info->ecall);
 502                 info_last->ecall = info->ecall;
 503         }
 504
 505         if (session->append_all == TRUE ||
 506                         info->roaming_policy != info_last->roaming_policy) {
 507                 policy = roamingpolicy2string(info->roaming_policy);
 508                 connman_dbus_dict_append_basic(dict, "RoamingPolicy",
 509                                                 DBUS_TYPE_STRING,
 510                                                 &policy);
 511                 info_last->roaming_policy = info->roaming_policy;
 512         }
 513
 514         session->append_all = FALSE;
 515 }
 516
 517 static connman_bool_t is_type_matching_state(enum connman_session_state *state,
 518                                                 enum connman_session_type type)
 519 {
 520         switch (type) {
 521         case CONNMAN_SESSION_TYPE_ANY:
 522                 return TRUE;
 523         case CONNMAN_SESSION_TYPE_LOCAL:
 524                 if (*state >= CONNMAN_SESSION_STATE_CONNECTED) {
 525                         *state = CONNMAN_SESSION_STATE_CONNECTED;
 526                         return TRUE;
 527                 }
 528
 529                 break;
 530         case CONNMAN_SESSION_TYPE_INTERNET:
 531                 if (*state == CONNMAN_SESSION_STATE_ONLINE)
 532                         return TRUE;
 533                 break;
 534         }
 535
 536         return FALSE;
 537 }
 538
 539 static connman_bool_t compute_notifiable_changes(struct connman_session *session)
 540 {
 541         struct session_info *info_last = session->info_last;
 542         struct session_info *info = session->info;
 543
 544         if (session->append_all == TRUE)
 545                 return TRUE;
 546
 547         if (info->state != info_last->state)
 548                 return TRUE;
 549
 550         if (info->entry != info_last->entry &&
 551                         info->state >= CONNMAN_SESSION_STATE_CONNECTED)
 552                 return TRUE;
 553
 554         if (info->allowed_bearers != info_last->allowed_bearers ||
 555                         info->avoid_handover != info_last->avoid_handover ||
 556                         info->stay_connected != info_last->stay_connected ||
 557                         info->roaming_policy != info_last->roaming_policy ||
 558                         info->priority != info_last->priority ||
 559                         info->ecall != info_last->ecall ||
 560                         info->type != info_last->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->allowed_bearers;
 621                         list != NULL; list = list->next) {
 622                 struct bearer_info *bearer_info = list->data;
 623                 enum connman_service_type service_type;
 624
 625                 if (bearer_info->match_all == TRUE)
 626                         return TRUE;
 627
 628                 service_type = connman_service_get_type(service);
 629                 if (bearer_info->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->allowed_bearers;
 692                         list != NULL; list = list->next) {
 693                 struct bearer_info *bearer_info = list->data;
 694
 695                 if (bearer_info->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_info->service_type &&
 711                                 type_b == bearer_info->service_type) {
 712                         return 0;
 713                 }
 714
 715                 if (type_a == bearer_info->service_type &&
 716                                 type_b != bearer_info->service_type) {
 717                         return -1;
 718                 }
 719
 720                 if (type_a != bearer_info->service_type &&
 721                                 type_b == bearer_info->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         g_slist_foreach(info->allowed_bearers, cleanup_bearer_info, NULL);
 755         g_slist_free(info->allowed_bearers);
 756
 757         g_free(session->owner);
 758         g_free(session->session_path);
 759         g_free(session->notify_path);
 760         g_free(session->info);
 761         g_free(session->info_last);
 762
 763         g_free(session);
 764 }
 765
 766 static enum connman_session_state service_to_session_state(enum connman_service_state state)
 767 {
 768         switch (state) {
 769         case CONNMAN_SERVICE_STATE_UNKNOWN:
 770         case CONNMAN_SERVICE_STATE_IDLE:
 771         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 772         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 773         case CONNMAN_SERVICE_STATE_DISCONNECT:
 774         case CONNMAN_SERVICE_STATE_FAILURE:
 775                 break;
 776         case CONNMAN_SERVICE_STATE_READY:
 777                 return CONNMAN_SESSION_STATE_CONNECTED;
 778         case CONNMAN_SERVICE_STATE_ONLINE:
 779                 return CONNMAN_SESSION_STATE_ONLINE;
 780         }
 781
 782         return CONNMAN_SESSION_STATE_DISCONNECTED;
 783 }
 784
 785 static connman_bool_t is_connected(enum connman_service_state state)
 786 {
 787         switch (state) {
 788         case CONNMAN_SERVICE_STATE_UNKNOWN:
 789         case CONNMAN_SERVICE_STATE_IDLE:
 790         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 791         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 792         case CONNMAN_SERVICE_STATE_DISCONNECT:
 793         case CONNMAN_SERVICE_STATE_FAILURE:
 794                 break;
 795         case CONNMAN_SERVICE_STATE_READY:
 796         case CONNMAN_SERVICE_STATE_ONLINE:
 797                 return TRUE;
 798         }
 799
 800         return FALSE;
 801 }
 802
 803 static connman_bool_t is_connecting(enum connman_service_state state)
 804 {
 805         switch (state) {
 806         case CONNMAN_SERVICE_STATE_UNKNOWN:
 807         case CONNMAN_SERVICE_STATE_IDLE:
 808                 break;
 809         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 810         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 811                 return TRUE;
 812         case CONNMAN_SERVICE_STATE_DISCONNECT:
 813         case CONNMAN_SERVICE_STATE_FAILURE:
 814         case CONNMAN_SERVICE_STATE_READY:
 815         case CONNMAN_SERVICE_STATE_ONLINE:
 816                 break;
 817         }
 818
 819         return FALSE;
 820 }
 821
 822 static connman_bool_t explicit_connect(enum connman_session_reason reason)
 823 {
 824         switch (reason) {
 825         case CONNMAN_SESSION_REASON_UNKNOWN:
 826         case CONNMAN_SESSION_REASON_FREE_RIDE:
 827         case CONNMAN_SESSION_REASON_DISCONNECT:
 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         if (ecall_info != NULL && ecall_info != info)
 855                 return FALSE;
 856
 857         return TRUE;
 858 }
 859
 860 struct pending_data {
 861         unsigned int timeout;
 862         struct service_entry *entry;
 863         gboolean (*cb)(gpointer);
 864 };
 865
 866 static void pending_timeout_free(gpointer data, gpointer user_data)
 867 {
 868         struct pending_data *pending = data;
 869
 870         DBG("pending %p timeout %d", pending, pending->timeout);
 871         g_source_remove(pending->timeout);
 872         g_free(pending);
 873 }
 874
 875 static void pending_timeout_remove_all(struct service_entry *entry)
 876 {
 877         DBG("");
 878
 879         g_slist_foreach(entry->pending_timeouts, pending_timeout_free, NULL);
 880         g_slist_free(entry->pending_timeouts);
 881         entry->pending_timeouts = NULL;
 882 }
 883
 884 static gboolean pending_timeout_cb(gpointer data)
 885 {
 886         struct pending_data *pending = data;
 887         struct service_entry *entry = pending->entry;
 888         gboolean ret;
 889
 890         DBG("pending %p timeout %d", pending, pending->timeout);
 891
 892         ret = pending->cb(pending->entry);
 893         if (ret == FALSE) {
 894                 entry->pending_timeouts =
 895                         g_slist_remove(entry->pending_timeouts,
 896                                         pending);
 897                 g_free(pending);
 898         }
 899         return ret;
 900 }
 901
 902 static connman_bool_t pending_timeout_add(unsigned int seconds,
 903                                         gboolean (*cb)(gpointer),
 904                                         struct service_entry *entry)
 905 {
 906         struct pending_data *pending = g_try_new0(struct pending_data, 1);
 907
 908         if (pending == NULL || cb == NULL || entry == NULL) {
 909                 g_free(pending);
 910                 return FALSE;
 911         }
 912
 913         pending->cb = cb;
 914         pending->entry = entry;
 915         pending->timeout = g_timeout_add_seconds(seconds, pending_timeout_cb,
 916                                                 pending);
 917         entry->pending_timeouts = g_slist_prepend(entry->pending_timeouts,
 918                                                 pending);
 919
 920         DBG("pending %p entry %p timeout id %d", pending, entry,
 921                 pending->timeout);
 922
 923         return TRUE;
 924 }
 925
 926 static gboolean call_disconnect(gpointer user_data)
 927 {
 928         struct service_entry *entry = user_data;
 929         struct connman_service *service = entry->service;
 930
 931         /*
 932          * TODO: We should mark this entry as pending work. In case
 933          * disconnect fails we just unassign this session from the
 934          * service and can't do anything later on it
 935          */
 936         DBG("disconnect service %p", service);
 937         __connman_service_disconnect(service);
 938
 939         return FALSE;
 940 }
 941
 942 static gboolean call_connect(gpointer user_data)
 943 {
 944         struct service_entry *entry = user_data;
 945         struct connman_service *service = entry->service;
 946
 947         DBG("connect service %p", service);
 948         __connman_service_connect(service);
 949
 950         return FALSE;
 951 }
 952
 953 static void deselect_service(struct session_info *info)
 954 {
 955         struct service_entry *entry;
 956         connman_bool_t disconnect, connected;
 957
 958         DBG("");
 959
 960         if (info->entry == NULL)
 961                 return;
 962
 963         disconnect = explicit_disconnect(info);
 964
 965         connected = is_connecting(info->entry->state) == TRUE ||
 966                         is_connected(info->entry->state) == TRUE;
 967
 968         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
 969         info->entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
 970
 971         entry = info->entry;
 972         info->entry = NULL;
 973
 974         DBG("disconnect %d connected %d", disconnect, connected);
 975
 976         if (disconnect == TRUE && connected == TRUE)
 977                 pending_timeout_add(0, call_disconnect, entry);
 978 }
 979
 980 static void deselect_and_disconnect(struct connman_session *session,
 981                                         enum connman_session_reason reason)
 982 {
 983         struct session_info *info = session->info;
 984
 985         deselect_service(info);
 986
 987         info->reason = reason;
 988 }
 989
 990 static void select_connected_service(struct session_info *info,
 991                                         struct service_entry *entry)
 992 {
 993         enum connman_session_state state;
 994
 995         state = service_to_session_state(entry->state);
 996         if (is_type_matching_state(&state, info->type) == FALSE)
 997                 return;
 998
 999         info->state = state;
1000
1001         info->entry = entry;
1002         info->entry->reason = info->reason;
1003
1004         if (explicit_connect(info->reason) == FALSE)
1005                 return;
1006
1007         __connman_service_session_inc(info->entry->service);
1008 }
1009
1010 static void select_offline_service(struct session_info *info,
1011                                         struct service_entry *entry)
1012 {
1013         if (explicit_connect(info->reason) == FALSE)
1014                 return;
1015
1016         info->state = service_to_session_state(entry->state);
1017
1018         info->entry = entry;
1019         info->entry->reason = info->reason;
1020
1021         __connman_service_session_inc(info->entry->service);
1022         pending_timeout_add(0, call_connect, entry);
1023 }
1024
1025 static void select_service(struct session_info *info,
1026                                 struct service_entry *entry)
1027 {
1028         DBG("service %p", entry->service);
1029
1030         if (is_connected(entry->state) == TRUE)
1031                 select_connected_service(info, entry);
1032         else
1033                 select_offline_service(info, entry);
1034 }
1035
1036 static void select_and_connect(struct connman_session *session,
1037                                 enum connman_session_reason reason)
1038 {
1039         struct session_info *info = session->info;
1040         struct service_entry *entry = NULL;
1041         GSequenceIter *iter;
1042
1043         DBG("session %p reason %s", session, reason2string(reason));
1044
1045         info->reason = reason;
1046
1047         iter = g_sequence_get_begin_iter(session->service_list);
1048
1049         while (g_sequence_iter_is_end(iter) == FALSE) {
1050                 entry = g_sequence_get(iter);
1051
1052                 switch (entry->state) {
1053                 case CONNMAN_SERVICE_STATE_ASSOCIATION:
1054                 case CONNMAN_SERVICE_STATE_CONFIGURATION:
1055                 case CONNMAN_SERVICE_STATE_READY:
1056                 case CONNMAN_SERVICE_STATE_ONLINE:
1057                 case CONNMAN_SERVICE_STATE_IDLE:
1058                 case CONNMAN_SERVICE_STATE_DISCONNECT:
1059                         select_service(info, entry);
1060                         return;
1061                 case CONNMAN_SERVICE_STATE_UNKNOWN:
1062                 case CONNMAN_SERVICE_STATE_FAILURE:
1063                         break;
1064                 }
1065
1066                 iter = g_sequence_iter_next(iter);
1067         }
1068 }
1069
1070 static struct service_entry *create_service_entry(struct connman_service *service,
1071                                         const char *name,
1072                                         enum connman_service_state state)
1073 {
1074         struct service_entry *entry;
1075         enum connman_service_type type;
1076         int idx;
1077
1078         entry = g_try_new0(struct service_entry, 1);
1079         if (entry == NULL)
1080                 return entry;
1081
1082         entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
1083         entry->state = state;
1084         if (name != NULL)
1085                 entry->name = name;
1086         else
1087                 entry->name = "";
1088         entry->service = service;
1089
1090         idx = __connman_service_get_index(entry->service);
1091         entry->ifname = connman_inet_ifname(idx);
1092         if (entry->ifname == NULL)
1093                 entry->ifname = g_strdup("");
1094
1095         type = connman_service_get_type(entry->service);
1096         entry->bearer = service2bearer(type);
1097
1098         return entry;
1099 }
1100
1101 static void destroy_service_entry(gpointer data)
1102 {
1103         struct service_entry *entry = data;
1104
1105         pending_timeout_remove_all(entry);
1106         g_free(entry->ifname);
1107
1108         g_free(entry);
1109 }
1110
1111 static void populate_service_list(struct connman_session *session)
1112 {
1113         struct service_entry *entry;
1114         GSequenceIter *iter;
1115
1116         session->service_hash =
1117                 g_hash_table_new_full(g_direct_hash, g_direct_equal,
1118                                         NULL, NULL);
1119         session->service_list = __connman_service_get_list(session,
1120                                                         service_match,
1121                                                         create_service_entry,
1122                                                         destroy_service_entry);
1123
1124         g_sequence_sort(session->service_list, sort_services, session);
1125
1126         iter = g_sequence_get_begin_iter(session->service_list);
1127
1128         while (g_sequence_iter_is_end(iter) == FALSE) {
1129                 entry = g_sequence_get(iter);
1130
1131                 DBG("service %p type %s name %s", entry->service,
1132                         service2bearer(connman_service_get_type(entry->service)),
1133                         entry->name);
1134
1135                 g_hash_table_replace(session->service_hash,
1136                                         entry->service, iter);
1137
1138                 iter = g_sequence_iter_next(iter);
1139         }
1140 }
1141
1142 static void session_changed(struct connman_session *session,
1143                                 enum connman_session_trigger trigger)
1144 {
1145         struct session_info *info = session->info;
1146         struct session_info *info_last = session->info_last;
1147         GSequenceIter *service_iter = NULL, *service_iter_last = NULL;
1148         GSequence *service_list_last;
1149         GHashTable *service_hash_last;
1150
1151         /*
1152          * TODO: This only a placeholder for the 'real' algorithm to
1153          * play a bit around. So we are going to improve it step by step.
1154          */
1155
1156         DBG("session %p trigger %s reason %s", session, trigger2string(trigger),
1157                                                 reason2string(info->reason));
1158
1159         if (info->entry != NULL) {
1160                 enum connman_session_state state;
1161
1162                 state = service_to_session_state(info->entry->state);
1163
1164                 if (is_type_matching_state(&state, info->type) == TRUE)
1165                         info->state = state;
1166         }
1167
1168         switch (trigger) {
1169         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
1170                 DBG("ignore session changed event");
1171                 return;
1172         case CONNMAN_SESSION_TRIGGER_SETTING:
1173                 if (info->allowed_bearers != info_last->allowed_bearers) {
1174
1175                         service_hash_last = session->service_hash;
1176                         service_list_last = session->service_list;
1177
1178                         populate_service_list(session);
1179
1180                         if (info->entry != NULL) {
1181                                 service_iter_last = g_hash_table_lookup(
1182                                                         service_hash_last,
1183                                                         info->entry->service);
1184                                 service_iter = g_hash_table_lookup(
1185                                                         session->service_hash,
1186                                                         info->entry->service);
1187                         }
1188
1189                         if (service_iter == NULL && service_iter_last != NULL) {
1190                                 /*
1191                                  * The currently selected service is
1192                                  * not part of this session anymore.
1193                                  */
1194                                 deselect_and_disconnect(session, info->reason);
1195                         }
1196
1197                         g_hash_table_remove_all(service_hash_last);
1198                         g_sequence_free(service_list_last);
1199                 }
1200
1201                 if (info->type != info_last->type) {
1202                         if (info->state >= CONNMAN_SESSION_STATE_CONNECTED &&
1203                                         is_type_matching_state(&info->state,
1204                                                         info->type) == FALSE)
1205                                 deselect_and_disconnect(session, info->reason);
1206                 }
1207
1208                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED) {
1209                         select_and_connect(session,
1210                                         CONNMAN_SESSION_REASON_FREE_RIDE);
1211                 }
1212
1213                 break;
1214         case CONNMAN_SESSION_TRIGGER_CONNECT:
1215                 if (info->state >= CONNMAN_SESSION_STATE_CONNECTED) {
1216                         if (info->entry->reason == CONNMAN_SESSION_REASON_CONNECT)
1217                                 break;
1218                         info->entry->reason = CONNMAN_SESSION_REASON_CONNECT;
1219                         __connman_service_session_inc(info->entry->service);
1220                         break;
1221                 }
1222
1223                 if (info->entry != NULL &&
1224                                 is_connecting(info->entry->state) == TRUE) {
1225                         break;
1226                 }
1227
1228                 select_and_connect(session,
1229                                 CONNMAN_SESSION_REASON_CONNECT);
1230
1231                 break;
1232         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
1233                 deselect_and_disconnect(session,
1234                                         CONNMAN_SESSION_REASON_DISCONNECT);
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, info->reason);
1245
1246                 if (info->reason == CONNMAN_SESSION_REASON_FREE_RIDE ||
1247                                 info->stay_connected == TRUE) {
1248                         select_and_connect(session, info->reason);
1249                 }
1250
1251                 break;
1252         case CONNMAN_SESSION_TRIGGER_ECALL:
1253                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED &&
1254                                 info->entry != NULL &&
1255                                 info->entry->service != NULL) {
1256                         deselect_and_disconnect(session, info->reason);
1257                 }
1258
1259                 break;
1260         }
1261
1262         session_notify(session);
1263 }
1264
1265 static DBusMessage *connect_session(DBusConnection *conn,
1266                                         DBusMessage *msg, void *user_data)
1267 {
1268         struct connman_session *session = user_data;
1269         struct session_info *info = session->info;
1270
1271         DBG("session %p", session);
1272
1273         if (ecall_info != NULL && ecall_info != info)
1274                 return __connman_error_failed(msg, EBUSY);
1275
1276         session_changed(session, CONNMAN_SESSION_TRIGGER_CONNECT);
1277
1278         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1279 }
1280
1281 static DBusMessage *disconnect_session(DBusConnection *conn,
1282                                         DBusMessage *msg, void *user_data)
1283 {
1284         struct connman_session *session = user_data;
1285         struct session_info *info = session->info;
1286
1287         DBG("session %p", session);
1288
1289         if (ecall_info != NULL && ecall_info != info)
1290                 return __connman_error_failed(msg, EBUSY);
1291
1292         session_changed(session, CONNMAN_SESSION_TRIGGER_DISCONNECT);
1293
1294         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1295 }
1296
1297 static void update_ecall_sessions(struct connman_session *session)
1298 {
1299         struct session_info *info = session->info;
1300         struct connman_session *session_iter;
1301         GHashTableIter iter;
1302         gpointer key, value;
1303
1304         g_hash_table_iter_init(&iter, session_hash);
1305
1306         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1307                 session_iter = value;
1308
1309                 if (session_iter == session)
1310                         continue;
1311
1312                 session_iter->info->ecall = info->ecall;
1313
1314                 session_changed(session_iter, CONNMAN_SESSION_TRIGGER_ECALL);
1315         }
1316 }
1317
1318 static void update_ecall(struct connman_session *session)
1319 {
1320         struct session_info *info = session->info;
1321         struct session_info *info_last = session->info_last;
1322
1323         DBG("session %p ecall_info %p ecall %d -> %d", session,
1324                 ecall_info, info_last->ecall, info->ecall);
1325
1326         if (ecall_info == NULL) {
1327                 if (!(info_last->ecall == FALSE && info->ecall == TRUE))
1328                         goto err;
1329
1330                 ecall_info = info;
1331         } else if (ecall_info == info) {
1332                 if (!(info_last->ecall == TRUE && info->ecall == FALSE))
1333                         goto err;
1334
1335                 ecall_info = NULL;
1336         } else {
1337                 goto err;
1338         }
1339
1340         update_ecall_sessions(session);
1341
1342         return;
1343
1344 err:
1345         /* not a valid transition */
1346         info->ecall = info_last->ecall;
1347 }
1348
1349 static DBusMessage *change_session(DBusConnection *conn,
1350                                         DBusMessage *msg, void *user_data)
1351 {
1352         struct connman_session *session = user_data;
1353         struct session_info *info = session->info;
1354         DBusMessageIter iter, value;
1355         const char *name;
1356         const char *val;
1357         GSList *allowed_bearers;
1358
1359         DBG("session %p", session);
1360         if (dbus_message_iter_init(msg, &iter) == FALSE)
1361                 return __connman_error_invalid_arguments(msg);
1362
1363         dbus_message_iter_get_basic(&iter, &name);
1364         dbus_message_iter_next(&iter);
1365         dbus_message_iter_recurse(&iter, &value);
1366
1367         switch (dbus_message_iter_get_arg_type(&value)) {
1368         case DBUS_TYPE_ARRAY:
1369                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
1370                         allowed_bearers = session_parse_allowed_bearers(&value);
1371
1372                         g_slist_foreach(info->allowed_bearers,
1373                                         cleanup_bearer_info, NULL);
1374                         g_slist_free(info->allowed_bearers);
1375
1376                         if (allowed_bearers == NULL) {
1377                                 allowed_bearers = session_allowed_bearers_any();
1378
1379                                 if (allowed_bearers == NULL)
1380                                         return __connman_error_failed(msg, ENOMEM);
1381                         }
1382
1383                         info->allowed_bearers = allowed_bearers;
1384                 } else {
1385                         goto err;
1386                 }
1387                 break;
1388         case DBUS_TYPE_BOOLEAN:
1389                 if (g_str_equal(name, "Priority") == TRUE) {
1390                         dbus_message_iter_get_basic(&value,
1391                                         &info->priority);
1392                 } else if (g_str_equal(name, "AvoidHandover") == TRUE) {
1393                         dbus_message_iter_get_basic(&value,
1394                                         &info->avoid_handover);
1395                 } else if (g_str_equal(name, "StayConnected") == TRUE) {
1396                         dbus_message_iter_get_basic(&value,
1397                                         &info->stay_connected);
1398                 } else if (g_str_equal(name, "EmergencyCall") == TRUE) {
1399                         dbus_message_iter_get_basic(&value,
1400                                         &info->ecall);
1401
1402                         update_ecall(session);
1403                 } else {
1404                         goto err;
1405                 }
1406                 break;
1407         case DBUS_TYPE_STRING:
1408                 if (g_str_equal(name, "ConnectionType") == TRUE) {
1409                         dbus_message_iter_get_basic(&value, &val);
1410                         info->type = string2type(val);
1411                 } else if (g_str_equal(name, "RoamingPolicy") == TRUE) {
1412                         dbus_message_iter_get_basic(&value, &val);
1413                         info->roaming_policy =
1414                                         string2roamingpolicy(val);
1415                 } else {
1416                         goto err;
1417                 }
1418                 break;
1419         default:
1420                 goto err;
1421         }
1422
1423         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1424
1425         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1426
1427 err:
1428         return __connman_error_invalid_arguments(msg);
1429 }
1430
1431 static void release_session(gpointer key, gpointer value, gpointer user_data)
1432 {
1433         struct connman_session *session = value;
1434         DBusMessage *message;
1435
1436         DBG("owner %s path %s", session->owner, session->notify_path);
1437
1438         if (session->notify_watch > 0)
1439                 g_dbus_remove_watch(connection, session->notify_watch);
1440
1441         g_dbus_unregister_interface(connection, session->session_path,
1442                                                 CONNMAN_SESSION_INTERFACE);
1443
1444         message = dbus_message_new_method_call(session->owner,
1445                                                 session->notify_path,
1446                                                 CONNMAN_NOTIFICATION_INTERFACE,
1447                                                 "Release");
1448         if (message == NULL)
1449                 return;
1450
1451         dbus_message_set_no_reply(message, TRUE);
1452
1453         g_dbus_send_message(connection, message);
1454 }
1455
1456 static int session_disconnect(struct connman_session *session)
1457 {
1458         DBG("session %p, %s", session, session->owner);
1459
1460         if (session->notify_watch > 0)
1461                 g_dbus_remove_watch(connection, session->notify_watch);
1462
1463         g_dbus_unregister_interface(connection, session->session_path,
1464                                                 CONNMAN_SESSION_INTERFACE);
1465
1466         deselect_and_disconnect(session,
1467                                 CONNMAN_SESSION_REASON_DISCONNECT);
1468
1469         g_hash_table_remove(session_hash, session->session_path);
1470
1471         return 0;
1472 }
1473
1474 static void owner_disconnect(DBusConnection *conn, void *user_data)
1475 {
1476         struct connman_session *session = user_data;
1477
1478         DBG("session %p, %s died", session, session->owner);
1479
1480         session_disconnect(session);
1481 }
1482
1483 static DBusMessage *destroy_session(DBusConnection *conn,
1484                                         DBusMessage *msg, void *user_data)
1485 {
1486         struct connman_session *session = user_data;
1487         struct session_info *info = session->info;
1488
1489         DBG("session %p", session);
1490
1491         if (ecall_info != NULL && ecall_info != info)
1492                 return __connman_error_failed(msg, EBUSY);
1493
1494         session_disconnect(session);
1495
1496         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1497 }
1498
1499 static const GDBusMethodTable session_methods[] = {
1500         { GDBUS_METHOD("Destroy", NULL, NULL, destroy_session) },
1501         { GDBUS_METHOD("Connect", NULL, NULL, connect_session) },
1502         { GDBUS_METHOD("Disconnect", NULL, NULL,
1503                         disconnect_session ) },
1504         { GDBUS_METHOD("Change",
1505                         GDBUS_ARGS({ "name", "s" }, { "value", "v" }),
1506                         NULL, change_session) },
1507         { },
1508 };
1509
1510 int __connman_session_create(DBusMessage *msg)
1511 {
1512         const char *owner, *notify_path;
1513         char *session_path = NULL;
1514         DBusMessageIter iter, array;
1515         struct connman_session *session = NULL;
1516         struct session_info *info, *info_last;
1517
1518         enum connman_session_type type = CONNMAN_SESSION_TYPE_ANY;
1519         connman_bool_t priority = FALSE, avoid_handover = FALSE;
1520         connman_bool_t stay_connected = FALSE, ecall = FALSE;
1521         enum connman_session_roaming_policy roaming_policy =
1522                                 CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
1523         GSList *allowed_bearers = NULL;
1524         int err;
1525
1526         owner = dbus_message_get_sender(msg);
1527
1528         DBG("owner %s", owner);
1529
1530         if (ecall_info != NULL) {
1531                 /*
1532                  * If there is an emergency call already going on,
1533                  * ignore session creation attempt
1534                  */
1535                 err = -EBUSY;
1536                 goto err;
1537         }
1538
1539         dbus_message_iter_init(msg, &iter);
1540         dbus_message_iter_recurse(&iter, &array);
1541
1542         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1543                 DBusMessageIter entry, value;
1544                 const char *key, *val;
1545
1546                 dbus_message_iter_recurse(&array, &entry);
1547                 dbus_message_iter_get_basic(&entry, &key);
1548
1549                 dbus_message_iter_next(&entry);
1550                 dbus_message_iter_recurse(&entry, &value);
1551
1552                 switch (dbus_message_iter_get_arg_type(&value)) {
1553                 case DBUS_TYPE_ARRAY:
1554                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
1555                                 allowed_bearers =
1556                                         session_parse_allowed_bearers(&value);
1557                         } else {
1558                                 return -EINVAL;
1559                         }
1560                         break;
1561                 case DBUS_TYPE_BOOLEAN:
1562                         if (g_str_equal(key, "Priority") == TRUE) {
1563                                 dbus_message_iter_get_basic(&value,
1564                                                         &priority);
1565                         } else if (g_str_equal(key, "AvoidHandover") == TRUE) {
1566                                 dbus_message_iter_get_basic(&value,
1567                                                         &avoid_handover);
1568                         } else if (g_str_equal(key, "StayConnected") == TRUE) {
1569                                 dbus_message_iter_get_basic(&value,
1570                                                         &stay_connected);
1571                         } else if (g_str_equal(key, "EmergencyCall") == TRUE) {
1572                                 dbus_message_iter_get_basic(&value,
1573                                                         &ecall);
1574                         } else {
1575                                 return -EINVAL;
1576                         }
1577                         break;
1578                 case DBUS_TYPE_STRING:
1579                         if (g_str_equal(key, "ConnectionType") == TRUE) {
1580                                 dbus_message_iter_get_basic(&value, &val);
1581                                 type = string2type(val);
1582                         } else if (g_str_equal(key, "RoamingPolicy") == TRUE) {
1583                                 dbus_message_iter_get_basic(&value, &val);
1584                                 roaming_policy = string2roamingpolicy(val);
1585                         } else {
1586                                 return -EINVAL;
1587                         }
1588                 }
1589                 dbus_message_iter_next(&array);
1590         }
1591
1592         dbus_message_iter_next(&iter);
1593         dbus_message_iter_get_basic(&iter, &notify_path);
1594
1595         if (notify_path == NULL) {
1596                 err = -EINVAL;
1597                 goto err;
1598         }
1599
1600         session_path = g_strdup_printf("/sessions%s", notify_path);
1601         if (session_path == NULL) {
1602                 err = -ENOMEM;
1603                 goto err;
1604         }
1605
1606         session = g_hash_table_lookup(session_hash, session_path);
1607         if (session != NULL) {
1608                 session = NULL;
1609                 err = -EEXIST;
1610                 goto err;
1611         }
1612
1613         session = g_try_new0(struct connman_session, 1);
1614         if (session == NULL) {
1615                 err = -ENOMEM;
1616                 goto err;
1617         }
1618
1619         session->info = g_try_new0(struct session_info, 1);
1620         if (session->info == NULL) {
1621                 err = -ENOMEM;
1622                 goto err;
1623         }
1624
1625         session->info_last = g_try_new0(struct session_info, 1);
1626         if (session->info_last == NULL) {
1627                 err = -ENOMEM;
1628                 goto err;
1629         }
1630
1631         info = session->info;
1632         info_last = session->info_last;
1633
1634         session->owner = g_strdup(owner);
1635         session->session_path = session_path;
1636         session->notify_path = g_strdup(notify_path);
1637         session->notify_watch =
1638                 g_dbus_add_disconnect_watch(connection, session->owner,
1639                                         owner_disconnect, session, NULL);
1640
1641         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
1642         info->type = type;
1643         info->priority = priority;
1644         info->avoid_handover = avoid_handover;
1645         info->stay_connected = stay_connected;
1646         info->ecall = ecall;
1647         info->roaming_policy = roaming_policy;
1648         info->entry = NULL;
1649
1650         if (allowed_bearers == NULL) {
1651                 info->allowed_bearers =
1652                                 session_allowed_bearers_any();
1653
1654                 if (info->allowed_bearers == NULL) {
1655                         err = -ENOMEM;
1656                         goto err;
1657                 }
1658         } else {
1659                 info->allowed_bearers = allowed_bearers;
1660         }
1661
1662         g_hash_table_replace(session_hash, session->session_path, session);
1663
1664         DBG("add %s", session->session_path);
1665
1666         if (g_dbus_register_interface(connection, session->session_path,
1667                                         CONNMAN_SESSION_INTERFACE,
1668                                         session_methods, NULL,
1669                                         NULL, session, NULL) == FALSE) {
1670                 connman_error("Failed to register %s", session->session_path);
1671                 g_hash_table_remove(session_hash, session->session_path);
1672                 session = NULL;
1673
1674                 err = -EINVAL;
1675                 goto err;
1676         }
1677
1678         g_dbus_send_reply(connection, msg,
1679                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1680                                 DBUS_TYPE_INVALID);
1681
1682
1683         populate_service_list(session);
1684         if (info->ecall == TRUE) {
1685                 ecall_info = info;
1686                 update_ecall_sessions(session);
1687         }
1688
1689         info_last->state = info->state;
1690         info_last->priority = info->priority;
1691         info_last->avoid_handover = info->avoid_handover;
1692         info_last->stay_connected = info->stay_connected;
1693         info_last->ecall = info->ecall;
1694         info_last->roaming_policy = info->roaming_policy;
1695         info_last->entry = info->entry;
1696         info_last->allowed_bearers = info->allowed_bearers;
1697
1698         session->append_all = TRUE;
1699
1700         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1701
1702         return 0;
1703
1704 err:
1705         connman_error("Failed to create session");
1706
1707         if (session != NULL) {
1708                 if (session->info_last != NULL)
1709                         g_free(session->info_last);
1710                 if (session->info != NULL)
1711                         g_free(session->info);
1712                 g_free(session);
1713         }
1714
1715         g_free(session_path);
1716
1717         g_slist_foreach(allowed_bearers, cleanup_bearer_info, NULL);
1718         g_slist_free(allowed_bearers);
1719
1720         return err;
1721 }
1722
1723 int __connman_session_destroy(DBusMessage *msg)
1724 {
1725         const char *owner, *session_path;
1726         struct connman_session *session;
1727
1728         owner = dbus_message_get_sender(msg);
1729
1730         DBG("owner %s", owner);
1731
1732         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1733                                                         DBUS_TYPE_INVALID);
1734         if (session_path == NULL)
1735                 return -EINVAL;
1736
1737         session = g_hash_table_lookup(session_hash, session_path);
1738         if (session == NULL)
1739                 return -EINVAL;
1740
1741         if (g_strcmp0(owner, session->owner) != 0)
1742                 return -EACCES;
1743
1744         session_disconnect(session);
1745
1746         return 0;
1747 }
1748
1749 connman_bool_t __connman_session_mode()
1750 {
1751         return sessionmode;
1752 }
1753
1754 void __connman_session_set_mode(connman_bool_t enable)
1755 {
1756         DBG("enable %d", enable);
1757
1758         if (sessionmode != enable) {
1759                 sessionmode = enable;
1760
1761                 connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
1762                                 CONNMAN_MANAGER_INTERFACE, "SessionMode",
1763                                 DBUS_TYPE_BOOLEAN, &sessionmode);
1764         }
1765
1766         if (sessionmode == TRUE)
1767                 __connman_service_disconnect_all();
1768 }
1769
1770 static void service_add(struct connman_service *service,
1771                         const char *name)
1772 {
1773         GHashTableIter iter;
1774         GSequenceIter *iter_service_list;
1775         gpointer key, value;
1776         struct connman_session *session;
1777         struct service_entry *entry;
1778
1779         DBG("service %p", service);
1780
1781         g_hash_table_iter_init(&iter, session_hash);
1782
1783         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1784                 session = value;
1785
1786                 if (service_match(session, service) == FALSE)
1787                         continue;
1788
1789                 entry = create_service_entry(service, name,
1790                                                 CONNMAN_SERVICE_STATE_IDLE);
1791                 if (entry == NULL)
1792                         continue;
1793
1794                 iter_service_list =
1795                         g_sequence_insert_sorted(session->service_list,
1796                                                         entry, sort_services,
1797                                                         session);
1798
1799                 g_hash_table_replace(session->service_hash, service,
1800                                         iter_service_list);
1801
1802                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1803         }
1804 }
1805
1806 static void service_remove(struct connman_service *service)
1807 {
1808
1809         GHashTableIter iter;
1810         gpointer key, value;
1811         struct connman_session *session;
1812         struct session_info *info;
1813
1814         DBG("service %p", service);
1815
1816         g_hash_table_iter_init(&iter, session_hash);
1817
1818         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1819                 GSequenceIter *seq_iter;
1820                 session = value;
1821                 info = session->info;
1822
1823                 seq_iter = g_hash_table_lookup(session->service_hash, service);
1824                 if (seq_iter == NULL)
1825                         continue;
1826
1827                 g_sequence_remove(seq_iter);
1828
1829                 if (info->entry != NULL && info->entry->service == service)
1830                         info->entry = NULL;
1831                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1832         }
1833 }
1834
1835 static void service_state_changed(struct connman_service *service,
1836                                         enum connman_service_state state)
1837 {
1838         GHashTableIter iter;
1839         gpointer key, value;
1840
1841         DBG("service %p state %d", service, state);
1842
1843         g_hash_table_iter_init(&iter, session_hash);
1844
1845         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1846                 struct connman_session *session = value;
1847                 GSequenceIter *service_iter;
1848
1849                 service_iter = g_hash_table_lookup(session->service_hash, service);
1850                 if (service_iter != NULL) {
1851                         struct service_entry *entry;
1852
1853                         entry = g_sequence_get(service_iter);
1854                         entry->state = state;
1855                 }
1856
1857                 session_changed(session,
1858                                 CONNMAN_SESSION_TRIGGER_SERVICE);
1859         }
1860 }
1861
1862 static void ipconfig_changed(struct connman_service *service,
1863                                 struct connman_ipconfig *ipconfig)
1864 {
1865         GHashTableIter iter;
1866         gpointer key, value;
1867         struct connman_session *session;
1868         struct session_info *info;
1869         enum connman_ipconfig_type type;
1870
1871         DBG("service %p ipconfig %p", service, ipconfig);
1872
1873         type = __connman_ipconfig_get_config_type(ipconfig);
1874
1875         g_hash_table_iter_init(&iter, session_hash);
1876
1877         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1878                 session = value;
1879                 info = session->info;
1880
1881                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED)
1882                         continue;
1883
1884                 if (info->entry != NULL && info->entry->service == service) {
1885                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
1886                                 ipconfig_ipv4_changed(session);
1887                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
1888                                 ipconfig_ipv6_changed(session);
1889                 }
1890         }
1891 }
1892
1893 static struct connman_notifier session_notifier = {
1894         .name                   = "session",
1895         .service_add            = service_add,
1896         .service_remove         = service_remove,
1897         .service_state_changed  = service_state_changed,
1898         .ipconfig_changed       = ipconfig_changed,
1899 };
1900
1901 int __connman_session_init(void)
1902 {
1903         int err;
1904
1905         DBG("");
1906
1907         connection = connman_dbus_get_connection();
1908         if (connection == NULL)
1909                 return -1;
1910
1911         err = connman_notifier_register(&session_notifier);
1912         if (err < 0) {
1913                 dbus_connection_unref(connection);
1914                 return err;
1915         }
1916
1917         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
1918                                                 NULL, cleanup_session);
1919
1920         sessionmode = FALSE;
1921         return 0;
1922 }
1923
1924 void __connman_session_cleanup(void)
1925 {
1926         DBG("");
1927
1928         if (connection == NULL)
1929                 return;
1930
1931         connman_notifier_unregister(&session_notifier);
1932
1933         g_hash_table_foreach(session_hash, release_session, NULL);
1934         g_hash_table_destroy(session_hash);
1935         session_hash = NULL;
1936
1937         dbus_connection_unref(connection);
1938 }