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_PERIODIC        = 4,
  44         CONNMAN_SESSION_TRIGGER_SERVICE         = 5,
  45         CONNMAN_SESSION_TRIGGER_ECALL           = 6,
  46 };
  47
  48 enum connman_session_reason {
  49         CONNMAN_SESSION_REASON_UNKNOWN          = 0,
  50         CONNMAN_SESSION_REASON_CONNECT          = 1,
  51         CONNMAN_SESSION_REASON_DISCONNECT       = 2,
  52         CONNMAN_SESSION_REASON_FREE_RIDE        = 3,
  53         CONNMAN_SESSION_REASON_PERIODIC         = 4,
  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 enum connman_session_type {
  63         CONNMAN_SESSION_TYPE_ANY      = 0,
  64         CONNMAN_SESSION_TYPE_LOCAL    = 1,
  65         CONNMAN_SESSION_TYPE_INTERNET = 2,
  66 };
  67
  68 enum connman_session_roaming_policy {
  69         CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN          = 0,
  70         CONNMAN_SESSION_ROAMING_POLICY_DEFAULT          = 1,
  71         CONNMAN_SESSION_ROAMING_POLICY_ALWAYS           = 2,
  72         CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN        = 3,
  73         CONNMAN_SESSION_ROAMING_POLICY_NATIONAL         = 4,
  74         CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL    = 5,
  75 };
  76
  77 struct service_entry {
  78         /* track why this service was selected */
  79         enum connman_session_reason reason;
  80         enum connman_service_state state;
  81         const char *name;
  82         struct connman_service *service;
  83         char *ifname;
  84         const char *bearer;
  85         GSList *pending_timeouts;
  86 };
  87
  88 struct session_info {
  89         enum connman_session_state state;
  90         enum connman_session_type type;
  91         connman_bool_t priority;
  92         GSList *allowed_bearers;
  93         connman_bool_t avoid_handover;
  94         connman_bool_t stay_connected;
  95         unsigned int periodic_connect;
  96         unsigned int idle_timeout;
  97         connman_bool_t ecall;
  98         enum connman_session_roaming_policy roaming_policy;
  99         unsigned int marker;
 100
 101         struct service_entry *entry;
 102         enum connman_session_reason reason;
 103 };
 104
 105 struct connman_session {
 106         char *owner;
 107         char *session_path;
 108         char *notify_path;
 109         guint notify_watch;
 110
 111         connman_bool_t append_all;
 112         struct session_info *info;
 113         struct session_info *info_last;
 114
 115         GSequence *service_list;
 116         GHashTable *service_hash;
 117 };
 118
 119 struct bearer_info {
 120         char *name;
 121         connman_bool_t match_all;
 122         enum connman_service_type service_type;
 123 };
 124
 125 static const char *trigger2string(enum connman_session_trigger trigger)
 126 {
 127         switch (trigger) {
 128         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
 129                 break;
 130         case CONNMAN_SESSION_TRIGGER_SETTING:
 131                 return "setting";
 132         case CONNMAN_SESSION_TRIGGER_CONNECT:
 133                 return "connect";
 134         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
 135                 return "disconnect";
 136         case CONNMAN_SESSION_TRIGGER_PERIODIC:
 137                 return "periodic";
 138         case CONNMAN_SESSION_TRIGGER_SERVICE:
 139                 return "service";
 140         case CONNMAN_SESSION_TRIGGER_ECALL:
 141                 return "ecall";
 142         }
 143
 144         return NULL;
 145 }
 146
 147 static const char *reason2string(enum connman_session_reason reason)
 148 {
 149         switch (reason) {
 150         case CONNMAN_SESSION_REASON_UNKNOWN:
 151                 return "unknown";
 152         case CONNMAN_SESSION_REASON_CONNECT:
 153                 return "connect";
 154         case CONNMAN_SESSION_REASON_DISCONNECT:
 155                 return "disconnect";
 156         case CONNMAN_SESSION_REASON_FREE_RIDE:
 157                 return "free-ride";
 158         case CONNMAN_SESSION_REASON_PERIODIC:
 159                 return "periodic";
 160         }
 161
 162         return NULL;
 163 }
 164
 165 static const char *state2string(enum connman_session_state state)
 166 {
 167         switch (state) {
 168         case CONNMAN_SESSION_STATE_DISCONNECTED:
 169                 return "disconnected";
 170         case CONNMAN_SESSION_STATE_CONNECTED:
 171                 return "connected";
 172         case CONNMAN_SESSION_STATE_ONLINE:
 173                 return "online";
 174         }
 175
 176         return NULL;
 177 }
 178
 179 static const char *type2string(enum connman_session_type type)
 180 {
 181         switch (type) {
 182         case CONNMAN_SESSION_TYPE_ANY:
 183                 return "";
 184         case CONNMAN_SESSION_TYPE_LOCAL:
 185                 return "local";
 186         case CONNMAN_SESSION_TYPE_INTERNET:
 187                 return "internet";
 188         }
 189
 190         return NULL;
 191 }
 192
 193 static enum connman_session_type string2type(const char *type)
 194 {
 195         if (g_strcmp0(type, "local") == 0)
 196                 return CONNMAN_SESSION_TYPE_LOCAL;
 197         else if (g_strcmp0(type, "internet") == 0)
 198                 return CONNMAN_SESSION_TYPE_INTERNET;
 199
 200         return CONNMAN_SESSION_TYPE_ANY;
 201 }
 202
 203 static const char *roamingpolicy2string(enum connman_session_roaming_policy policy)
 204 {
 205         switch (policy) {
 206         case CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN:
 207                 return "unknown";
 208         case CONNMAN_SESSION_ROAMING_POLICY_DEFAULT:
 209                 return "default";
 210         case CONNMAN_SESSION_ROAMING_POLICY_ALWAYS:
 211                 return "always";
 212         case CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN:
 213                 return "forbidden";
 214         case CONNMAN_SESSION_ROAMING_POLICY_NATIONAL:
 215                 return "national";
 216         case CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL:
 217                 return "international";
 218         }
 219
 220         return NULL;
 221 }
 222
 223 static enum connman_session_roaming_policy string2roamingpolicy(const char *policy)
 224 {
 225         if (g_strcmp0(policy, "default") == 0)
 226                 return CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 227         else if (g_strcmp0(policy, "always") == 0)
 228                 return CONNMAN_SESSION_ROAMING_POLICY_ALWAYS;
 229         else if (g_strcmp0(policy, "forbidden") == 0)
 230                 return CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
 231         else if (g_strcmp0(policy, "national") == 0)
 232                 return CONNMAN_SESSION_ROAMING_POLICY_NATIONAL;
 233         else if (g_strcmp0(policy, "international") == 0)
 234                 return CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL;
 235         else
 236                 return CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN;
 237 }
 238
 239 static enum connman_service_type bearer2service(const char *bearer)
 240 {
 241         if (bearer == NULL)
 242                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 243
 244         if (g_strcmp0(bearer, "ethernet") == 0)
 245                 return CONNMAN_SERVICE_TYPE_ETHERNET;
 246         else if (g_strcmp0(bearer, "wifi") == 0)
 247                 return CONNMAN_SERVICE_TYPE_WIFI;
 248         else if (g_strcmp0(bearer, "wimax") == 0)
 249                 return CONNMAN_SERVICE_TYPE_WIMAX;
 250         else if (g_strcmp0(bearer, "bluetooth") == 0)
 251                 return CONNMAN_SERVICE_TYPE_BLUETOOTH;
 252         else if (g_strcmp0(bearer, "cellular") == 0)
 253                 return CONNMAN_SERVICE_TYPE_CELLULAR;
 254         else if (g_strcmp0(bearer, "vpn") == 0)
 255                 return CONNMAN_SERVICE_TYPE_VPN;
 256         else
 257                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 258 }
 259
 260 static char *service2bearer(enum connman_service_type type)
 261 {
 262         switch (type) {
 263         case CONNMAN_SERVICE_TYPE_ETHERNET:
 264                 return "ethernet";
 265         case CONNMAN_SERVICE_TYPE_WIFI:
 266                 return "wifi";
 267         case CONNMAN_SERVICE_TYPE_WIMAX:
 268                 return "wimax";
 269         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 270                 return "bluetooth";
 271         case CONNMAN_SERVICE_TYPE_CELLULAR:
 272                 return "cellular";
 273         case CONNMAN_SERVICE_TYPE_VPN:
 274                 return "vpn";
 275         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 276         case CONNMAN_SERVICE_TYPE_SYSTEM:
 277         case CONNMAN_SERVICE_TYPE_GPS:
 278         case CONNMAN_SERVICE_TYPE_GADGET:
 279                 return "";
 280         }
 281
 282         return "";
 283 }
 284
 285 static void cleanup_bearer_info(gpointer data, gpointer user_data)
 286 {
 287         struct bearer_info *info = data;
 288
 289         g_free(info->name);
 290         g_free(info);
 291 }
 292
 293 static GSList *session_parse_allowed_bearers(DBusMessageIter *iter)
 294 {
 295         struct bearer_info *info;
 296         DBusMessageIter array;
 297         GSList *list = NULL;
 298
 299         dbus_message_iter_recurse(iter, &array);
 300
 301         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_STRING) {
 302                 char *bearer = NULL;
 303
 304                 dbus_message_iter_get_basic(&array, &bearer);
 305
 306                 info = g_try_new0(struct bearer_info, 1);
 307                 if (info == NULL) {
 308                         g_slist_foreach(list, cleanup_bearer_info, NULL);
 309                         g_slist_free(list);
 310
 311                         return NULL;
 312                 }
 313
 314                 info->name = g_strdup(bearer);
 315                 info->service_type = bearer2service(info->name);
 316
 317                 if (info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN &&
 318                                 g_strcmp0(info->name, "*") == 0) {
 319                         info->match_all = TRUE;
 320                 } else {
 321                         info->match_all = FALSE;
 322                 }
 323
 324                 list = g_slist_append(list, info);
 325
 326                 dbus_message_iter_next(&array);
 327         }
 328
 329         return list;
 330 }
 331
 332 static GSList *session_allowed_bearers_any(void)
 333 {
 334         struct bearer_info *info;
 335         GSList *list = NULL;
 336
 337         info = g_try_new0(struct bearer_info, 1);
 338         if (info == NULL) {
 339                 g_slist_free(list);
 340
 341                 return NULL;
 342         }
 343
 344         info->name = g_strdup("");
 345         info->match_all = TRUE;
 346         info->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 347
 348         list = g_slist_append(list, info);
 349
 350         return list;
 351 }
 352
 353 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 354 {
 355         struct session_info *info = user_data;
 356         GSList *list;
 357
 358         for (list = info->allowed_bearers;
 359                         list != NULL; list = list->next) {
 360                 struct bearer_info *info = list->data;
 361
 362                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 363                                                 &info->name);
 364         }
 365 }
 366
 367 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 368 {
 369         struct connman_service *service = user_data;
 370         struct connman_ipconfig *ipconfig_ipv4;
 371
 372         if (service == NULL)
 373                 return;
 374
 375         if (__connman_service_is_connected_state(service,
 376                                 CONNMAN_IPCONFIG_TYPE_IPV4) == FALSE) {
 377                 return;
 378         }
 379
 380         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 381         if (ipconfig_ipv4 == NULL)
 382                 return;
 383
 384         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 385 }
 386
 387 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 388 {
 389         struct connman_service *service = user_data;
 390         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 391
 392         if (service == NULL)
 393                 return;
 394
 395         if (__connman_service_is_connected_state(service,
 396                                 CONNMAN_IPCONFIG_TYPE_IPV6) == FALSE) {
 397                 return;
 398         }
 399
 400         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 401         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 402         if (ipconfig_ipv6 == NULL)
 403                 return;
 404
 405         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 406 }
 407
 408 static void append_notify(DBusMessageIter *dict,
 409                                         struct connman_session *session)
 410 {
 411         struct session_info *info = session->info;
 412         struct session_info *info_last = session->info_last;
 413         const char *policy;
 414         struct connman_service *service;
 415         const char *name, *ifname, *bearer;
 416
 417         if (session->append_all == TRUE ||
 418                         info->state != info_last->state) {
 419                 const char *state = state2string(info->state);
 420
 421                 connman_dbus_dict_append_basic(dict, "State",
 422                                                 DBUS_TYPE_STRING,
 423                                                 &state);
 424                 info_last->state = info->state;
 425         }
 426
 427         if (session->append_all == TRUE ||
 428                         info->entry != info_last->entry) {
 429                 if (info->entry == NULL) {
 430                         name = "";
 431                         ifname = "";
 432                         service = NULL;
 433                         bearer = "";
 434                 } else {
 435                         name = info->entry->name;
 436                         ifname = info->entry->ifname;
 437                         service = info->entry->service;
 438                         bearer = info->entry->bearer;
 439                 }
 440
 441                 connman_dbus_dict_append_basic(dict, "Name",
 442                                                 DBUS_TYPE_STRING,
 443                                                 &name);
 444
 445                 connman_dbus_dict_append_dict(dict, "IPv4",
 446                                                 append_ipconfig_ipv4,
 447                                                 service);
 448
 449                 connman_dbus_dict_append_dict(dict, "IPv6",
 450                                                 append_ipconfig_ipv6,
 451                                                 service);
 452
 453                 connman_dbus_dict_append_basic(dict, "Interface",
 454                                                 DBUS_TYPE_STRING,
 455                                                 &ifname);
 456
 457                 connman_dbus_dict_append_basic(dict, "Bearer",
 458                                                 DBUS_TYPE_STRING,
 459                                                 &bearer);
 460
 461                 info_last->entry = info->entry;
 462         }
 463
 464         if (session->append_all == TRUE || info->type != info_last->type) {
 465                 const char *type = type2string(info->type);
 466
 467                 connman_dbus_dict_append_basic(dict, "ConnectionType",
 468                                                 DBUS_TYPE_STRING,
 469                                                 &type);
 470                 info_last->type = info->type;
 471         }
 472
 473         if (session->append_all == TRUE ||
 474                         info->priority != info_last->priority) {
 475                 connman_dbus_dict_append_basic(dict, "Priority",
 476                                                 DBUS_TYPE_BOOLEAN,
 477                                                 &info->priority);
 478                 info_last->priority = info->priority;
 479         }
 480
 481         if (session->append_all == TRUE ||
 482                         info->allowed_bearers != info_last->allowed_bearers) {
 483                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 484                                                 DBUS_TYPE_STRING,
 485                                                 append_allowed_bearers,
 486                                                 info);
 487                 info_last->allowed_bearers = info->allowed_bearers;
 488         }
 489
 490         if (session->append_all == TRUE ||
 491                         info->avoid_handover != info_last->avoid_handover) {
 492                 connman_dbus_dict_append_basic(dict, "AvoidHandover",
 493                                                 DBUS_TYPE_BOOLEAN,
 494                                                 &info->avoid_handover);
 495                 info_last->avoid_handover = info->avoid_handover;
 496         }
 497
 498         if (session->append_all == TRUE ||
 499                         info->stay_connected != info_last->stay_connected) {
 500                 connman_dbus_dict_append_basic(dict, "StayConnected",
 501                                                 DBUS_TYPE_BOOLEAN,
 502                                                 &info->stay_connected);
 503                 info_last->stay_connected = info->stay_connected;
 504         }
 505
 506         if (session->append_all == TRUE ||
 507                         info->periodic_connect != info_last->periodic_connect) {
 508                 connman_dbus_dict_append_basic(dict, "PeriodicConnect",
 509                                                 DBUS_TYPE_UINT32,
 510                                                 &info->periodic_connect);
 511                 info_last->periodic_connect = info->periodic_connect;
 512         }
 513
 514         if (session->append_all == TRUE ||
 515                         info->idle_timeout != info_last->idle_timeout) {
 516                 connman_dbus_dict_append_basic(dict, "IdleTimeout",
 517                                                 DBUS_TYPE_UINT32,
 518                                                 &info->idle_timeout);
 519                 info_last->idle_timeout = info->idle_timeout;
 520         }
 521
 522         if (session->append_all == TRUE ||
 523                         info->ecall != info_last->ecall) {
 524                 connman_dbus_dict_append_basic(dict, "EmergencyCall",
 525                                                 DBUS_TYPE_BOOLEAN,
 526                                                 &info->ecall);
 527                 info_last->ecall = info->ecall;
 528         }
 529
 530         if (session->append_all == TRUE ||
 531                         info->roaming_policy != info_last->roaming_policy) {
 532                 policy = roamingpolicy2string(info->roaming_policy);
 533                 connman_dbus_dict_append_basic(dict, "RoamingPolicy",
 534                                                 DBUS_TYPE_STRING,
 535                                                 &policy);
 536                 info_last->roaming_policy = info->roaming_policy;
 537         }
 538
 539         if (session->append_all == TRUE ||
 540                         info->marker != info_last->marker) {
 541                 connman_dbus_dict_append_basic(dict, "SessionMarker",
 542                                                 DBUS_TYPE_UINT32,
 543                                                 &info->marker);
 544                 info_last->marker = info->marker;
 545         }
 546
 547         session->append_all = FALSE;
 548 }
 549
 550 static connman_bool_t is_type_matching_state(enum connman_session_state *state,
 551                                                 enum connman_session_type type)
 552 {
 553         switch (type) {
 554         case CONNMAN_SESSION_TYPE_ANY:
 555                 return TRUE;
 556         case CONNMAN_SESSION_TYPE_LOCAL:
 557                 if (*state >= CONNMAN_SESSION_STATE_CONNECTED) {
 558                         *state = CONNMAN_SESSION_STATE_CONNECTED;
 559                         return TRUE;
 560                 }
 561
 562                 break;
 563         case CONNMAN_SESSION_TYPE_INTERNET:
 564                 if (*state == CONNMAN_SESSION_STATE_ONLINE)
 565                         return TRUE;
 566                 break;
 567         }
 568
 569         return FALSE;
 570 }
 571
 572 static connman_bool_t compute_notifiable_changes(struct connman_session *session)
 573 {
 574         struct session_info *info_last = session->info_last;
 575         struct session_info *info = session->info;
 576
 577         if (session->append_all == TRUE)
 578                 return TRUE;
 579
 580         if (info->state != info_last->state)
 581                 return TRUE;
 582
 583         if (info->entry != info_last->entry &&
 584                         info->state >= CONNMAN_SESSION_STATE_CONNECTED)
 585                 return TRUE;
 586
 587         if (info->periodic_connect != info_last->periodic_connect ||
 588                         info->allowed_bearers != info_last->allowed_bearers ||
 589                         info->avoid_handover != info_last->avoid_handover ||
 590                         info->stay_connected != info_last->stay_connected ||
 591                         info->roaming_policy != info_last->roaming_policy ||
 592                         info->idle_timeout != info_last->idle_timeout ||
 593                         info->priority != info_last->priority ||
 594                         info->marker != info_last->marker ||
 595                         info->ecall != info_last->ecall ||
 596                         info->type != info_last->type)
 597                 return TRUE;
 598
 599         return FALSE;
 600 }
 601
 602 static gboolean session_notify(gpointer user_data)
 603 {
 604         struct connman_session *session = user_data;
 605         DBusMessage *msg;
 606         DBusMessageIter array, dict;
 607
 608         if (compute_notifiable_changes(session) == FALSE)
 609                 return FALSE;
 610
 611         DBG("session %p owner %s notify_path %s", session,
 612                 session->owner, session->notify_path);
 613
 614         msg = dbus_message_new_method_call(session->owner, session->notify_path,
 615                                                 CONNMAN_NOTIFICATION_INTERFACE,
 616                                                 "Update");
 617         if (msg == NULL)
 618                 return FALSE;
 619
 620         dbus_message_iter_init_append(msg, &array);
 621         connman_dbus_dict_open(&array, &dict);
 622
 623         append_notify(&dict, session);
 624
 625         connman_dbus_dict_close(&array, &dict);
 626
 627         g_dbus_send_message(connection, msg);
 628
 629         return FALSE;
 630 }
 631
 632 static void ipconfig_ipv4_changed(struct connman_session *session)
 633 {
 634         struct session_info *info = session->info;
 635
 636         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 637                                                 "IPv4", append_ipconfig_ipv4,
 638                                                 info->entry->service);
 639 }
 640
 641 static void ipconfig_ipv6_changed(struct connman_session *session)
 642 {
 643         struct session_info *info = session->info;
 644
 645         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 646                                                 "IPv6", append_ipconfig_ipv6,
 647                                                 info->entry->service);
 648 }
 649
 650 static connman_bool_t service_type_match(struct connman_session *session,
 651                                         struct connman_service *service)
 652 {
 653         struct session_info *info = session->info;
 654         GSList *list;
 655
 656         for (list = info->allowed_bearers;
 657                         list != NULL; list = list->next) {
 658                 struct bearer_info *info = list->data;
 659                 enum connman_service_type service_type;
 660
 661                 if (info->match_all == TRUE)
 662                         return TRUE;
 663
 664                 service_type = connman_service_get_type(service);
 665                 if (info->service_type == service_type)
 666                         return TRUE;
 667         }
 668
 669         return FALSE;
 670 }
 671
 672 static connman_bool_t service_match(struct connman_session *session,
 673                                         struct connman_service *service)
 674 {
 675         if (service_type_match(session, service) == FALSE)
 676                 return FALSE;
 677
 678         return TRUE;
 679 }
 680
 681 static int service_type_weight(enum connman_service_type type)
 682 {
 683         /*
 684          * The session doesn't care which service
 685          * to use. Nevertheless we have to sort them
 686          * according their type. The ordering is
 687          *
 688          * 1. Ethernet
 689          * 2. Bluetooth
 690          * 3. WiFi/WiMAX
 691          * 4. Cellular
 692          */
 693
 694         switch (type) {
 695         case CONNMAN_SERVICE_TYPE_ETHERNET:
 696                 return 4;
 697         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 698                 return 3;
 699         case CONNMAN_SERVICE_TYPE_WIFI:
 700         case CONNMAN_SERVICE_TYPE_WIMAX:
 701                 return 2;
 702         case CONNMAN_SERVICE_TYPE_CELLULAR:
 703                 return 1;
 704         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 705         case CONNMAN_SERVICE_TYPE_SYSTEM:
 706         case CONNMAN_SERVICE_TYPE_GPS:
 707         case CONNMAN_SERVICE_TYPE_VPN:
 708         case CONNMAN_SERVICE_TYPE_GADGET:
 709                 break;
 710         }
 711
 712         return 0;
 713 }
 714
 715 static gint sort_allowed_bearers(struct connman_service *service_a,
 716                                         struct connman_service *service_b,
 717                                         struct connman_session *session)
 718 {
 719         struct session_info *info = session->info;
 720         GSList *list;
 721         enum connman_service_type type_a, type_b;
 722         int weight_a, weight_b;
 723
 724         type_a = connman_service_get_type(service_a);
 725         type_b = connman_service_get_type(service_b);
 726
 727         for (list = info->allowed_bearers;
 728                         list != NULL; list = list->next) {
 729                 struct bearer_info *info = list->data;
 730
 731                 if (info->match_all == TRUE) {
 732                         if (type_a != type_b) {
 733                                 weight_a = service_type_weight(type_a);
 734                                 weight_b = service_type_weight(type_b);
 735
 736                                 if (weight_a > weight_b)
 737                                         return -1;
 738
 739                                 if (weight_a < weight_b)
 740                                         return 1;
 741
 742                                 return 0;
 743                         }
 744                 }
 745
 746                 if (type_a == info->service_type &&
 747                                 type_b == info->service_type) {
 748                         return 0;
 749                 }
 750
 751                 if (type_a == info->service_type &&
 752                                 type_b != info->service_type) {
 753                         return -1;
 754                 }
 755
 756                 if (type_a != info->service_type &&
 757                                 type_b == info->service_type) {
 758                         return 1;
 759                 }
 760         }
 761
 762         return 0;
 763 }
 764
 765 static gint sort_services(gconstpointer a, gconstpointer b, gpointer user_data)
 766 {
 767         struct service_entry *entry_a = (void *)a;
 768         struct service_entry *entry_b = (void *)b;
 769         struct connman_session *session = user_data;
 770
 771         return sort_allowed_bearers(entry_a->service, entry_b->service,
 772                                 session);
 773 }
 774
 775 static void cleanup_session(gpointer user_data)
 776 {
 777         struct connman_session *session = user_data;
 778         struct session_info *info = session->info;
 779
 780         DBG("remove %s", session->session_path);
 781
 782         g_hash_table_destroy(session->service_hash);
 783         g_sequence_free(session->service_list);
 784
 785         if (info->entry != NULL &&
 786                         info->entry->reason == CONNMAN_SESSION_REASON_CONNECT) {
 787                 __connman_service_disconnect(info->entry->service);
 788         }
 789
 790         g_slist_foreach(info->allowed_bearers, cleanup_bearer_info, NULL);
 791         g_slist_free(info->allowed_bearers);
 792
 793         g_free(session->owner);
 794         g_free(session->session_path);
 795         g_free(session->notify_path);
 796         g_free(session->info);
 797         g_free(session->info_last);
 798
 799         g_free(session);
 800 }
 801
 802 static enum connman_session_state service_to_session_state(enum connman_service_state state)
 803 {
 804         switch (state) {
 805         case CONNMAN_SERVICE_STATE_UNKNOWN:
 806         case CONNMAN_SERVICE_STATE_IDLE:
 807         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 808         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 809         case CONNMAN_SERVICE_STATE_DISCONNECT:
 810         case CONNMAN_SERVICE_STATE_FAILURE:
 811                 break;
 812         case CONNMAN_SERVICE_STATE_READY:
 813                 return CONNMAN_SESSION_STATE_CONNECTED;
 814         case CONNMAN_SERVICE_STATE_ONLINE:
 815                 return CONNMAN_SESSION_STATE_ONLINE;
 816         }
 817
 818         return CONNMAN_SESSION_STATE_DISCONNECTED;
 819 }
 820
 821 static connman_bool_t is_connected(enum connman_service_state state)
 822 {
 823         switch (state) {
 824         case CONNMAN_SERVICE_STATE_UNKNOWN:
 825         case CONNMAN_SERVICE_STATE_IDLE:
 826         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 827         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 828         case CONNMAN_SERVICE_STATE_DISCONNECT:
 829         case CONNMAN_SERVICE_STATE_FAILURE:
 830                 break;
 831         case CONNMAN_SERVICE_STATE_READY:
 832         case CONNMAN_SERVICE_STATE_ONLINE:
 833                 return TRUE;
 834         }
 835
 836         return FALSE;
 837 }
 838
 839 static connman_bool_t is_connecting(enum connman_service_state state)
 840 {
 841         switch (state) {
 842         case CONNMAN_SERVICE_STATE_UNKNOWN:
 843         case CONNMAN_SERVICE_STATE_IDLE:
 844                 break;
 845         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 846         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 847                 return TRUE;
 848         case CONNMAN_SERVICE_STATE_DISCONNECT:
 849         case CONNMAN_SERVICE_STATE_FAILURE:
 850         case CONNMAN_SERVICE_STATE_READY:
 851         case CONNMAN_SERVICE_STATE_ONLINE:
 852                 break;
 853         }
 854
 855         return FALSE;
 856 }
 857
 858 static connman_bool_t explicit_connect(enum connman_session_reason reason)
 859 {
 860         switch (reason) {
 861         case CONNMAN_SESSION_REASON_UNKNOWN:
 862         case CONNMAN_SESSION_REASON_FREE_RIDE:
 863         case CONNMAN_SESSION_REASON_DISCONNECT:
 864                 break;
 865         case CONNMAN_SESSION_REASON_CONNECT:
 866         case CONNMAN_SESSION_REASON_PERIODIC:
 867                 return TRUE;
 868         }
 869
 870         return FALSE;
 871 }
 872
 873 static connman_bool_t explicit_disconnect(struct session_info *info)
 874 {
 875         if (info->entry == NULL)
 876                 return FALSE;
 877
 878         DBG("reason %s service %p state %d",
 879                 reason2string(info->entry->reason),
 880                 info->entry->service, info->entry->state);
 881
 882         if (info->entry->reason == CONNMAN_SESSION_REASON_UNKNOWN)
 883                 return FALSE;
 884
 885         if (explicit_connect(info->entry->reason) == FALSE)
 886                 return FALSE;
 887
 888         if (__connman_service_session_dec(info->entry->service) == FALSE)
 889                 return FALSE;
 890
 891         if (ecall_info != NULL && ecall_info != info)
 892                 return FALSE;
 893
 894         return TRUE;
 895 }
 896
 897 struct pending_data {
 898         unsigned int timeout;
 899         struct service_entry *entry;
 900         gboolean (*cb)(gpointer);
 901 };
 902
 903 static void pending_timeout_free(gpointer data, gpointer user_data)
 904 {
 905         struct pending_data *pending = data;
 906
 907         DBG("pending %p timeout %d", pending, pending->timeout);
 908         g_source_remove(pending->timeout);
 909         g_free(pending);
 910 }
 911
 912 static void pending_timeout_remove_all(struct service_entry *entry)
 913 {
 914         DBG("");
 915
 916         g_slist_foreach(entry->pending_timeouts, pending_timeout_free, NULL);
 917         g_slist_free(entry->pending_timeouts);
 918         entry->pending_timeouts = NULL;
 919 }
 920
 921 static gboolean pending_timeout_cb(gpointer data)
 922 {
 923         struct pending_data *pending = data;
 924         struct service_entry *entry = pending->entry;
 925         gboolean ret;
 926
 927         DBG("pending %p timeout %d", pending, pending->timeout);
 928
 929         ret = pending->cb(pending->entry);
 930         if (ret == FALSE) {
 931                 entry->pending_timeouts =
 932                         g_slist_remove(entry->pending_timeouts,
 933                                         pending);
 934                 g_free(pending);
 935         }
 936         return ret;
 937 }
 938
 939 static connman_bool_t pending_timeout_add(unsigned int seconds,
 940                                         gboolean (*cb)(gpointer),
 941                                         struct service_entry *entry)
 942 {
 943         struct pending_data *pending = g_try_new0(struct pending_data, 1);
 944
 945         if (pending == NULL || cb == NULL || entry == NULL) {
 946                 g_free(pending);
 947                 return FALSE;
 948         }
 949
 950         pending->cb = cb;
 951         pending->entry = entry;
 952         pending->timeout = g_timeout_add_seconds(seconds, pending_timeout_cb,
 953                                                 pending);
 954         entry->pending_timeouts = g_slist_prepend(entry->pending_timeouts,
 955                                                 pending);
 956
 957         DBG("pending %p entry %p timeout id %d", pending, entry,
 958                 pending->timeout);
 959
 960         return TRUE;
 961 }
 962
 963 static gboolean call_disconnect(gpointer user_data)
 964 {
 965         struct service_entry *entry = user_data;
 966         struct connman_service *service = entry->service;
 967
 968         /*
 969          * TODO: We should mark this entry as pending work. In case
 970          * disconnect fails we just unassign this session from the
 971          * service and can't do anything later on it
 972          */
 973         DBG("disconnect service %p", service);
 974         __connman_service_disconnect(service);
 975
 976         return FALSE;
 977 }
 978
 979 static gboolean call_connect(gpointer user_data)
 980 {
 981         struct service_entry *entry = user_data;
 982         struct connman_service *service = entry->service;
 983
 984         DBG("connect service %p", service);
 985         __connman_service_connect(service);
 986
 987         return FALSE;
 988 }
 989
 990 static void deselect_service(struct session_info *info)
 991 {
 992         struct service_entry *entry;
 993         connman_bool_t disconnect, connected;
 994
 995         DBG("");
 996
 997         if (info->entry == NULL)
 998                 return;
 999
1000         disconnect = explicit_disconnect(info);
1001
1002         connected = is_connecting(info->entry->state) == TRUE ||
1003                         is_connected(info->entry->state) == TRUE;
1004
1005         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
1006         info->entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
1007
1008         entry = info->entry;
1009         info->entry = NULL;
1010
1011         DBG("disconnect %d connected %d", disconnect, connected);
1012
1013         if (disconnect == TRUE && connected == TRUE)
1014                 pending_timeout_add(0, call_disconnect, entry);
1015 }
1016
1017 static void deselect_and_disconnect(struct connman_session *session,
1018                                         enum connman_session_reason reason)
1019 {
1020         struct session_info *info = session->info;
1021
1022         deselect_service(info);
1023
1024         info->reason = reason;
1025 }
1026
1027 static void select_connected_service(struct session_info *info,
1028                                         struct service_entry *entry)
1029 {
1030         enum connman_session_state state;
1031
1032         state = service_to_session_state(entry->state);
1033         if (is_type_matching_state(&state, info->type) == FALSE)
1034                 return;
1035
1036         info->state = state;
1037
1038         info->entry = entry;
1039         info->entry->reason = info->reason;
1040
1041         if (explicit_connect(info->reason) == FALSE)
1042                 return;
1043
1044         __connman_service_session_inc(info->entry->service);
1045 }
1046
1047 static void select_offline_service(struct session_info *info,
1048                                         struct service_entry *entry)
1049 {
1050         if (explicit_connect(info->reason) == FALSE)
1051                 return;
1052
1053         info->state = service_to_session_state(entry->state);
1054
1055         info->entry = entry;
1056         info->entry->reason = info->reason;
1057
1058         __connman_service_session_inc(info->entry->service);
1059         pending_timeout_add(0, call_connect, entry);
1060 }
1061
1062 static void select_service(struct session_info *info,
1063                                 struct service_entry *entry)
1064 {
1065         DBG("service %p", entry->service);
1066
1067         if (is_connected(entry->state) == TRUE)
1068                 select_connected_service(info, entry);
1069         else
1070                 select_offline_service(info, entry);
1071 }
1072
1073 static void select_and_connect(struct connman_session *session,
1074                                 enum connman_session_reason reason)
1075 {
1076         struct session_info *info = session->info;
1077         struct service_entry *entry = NULL;
1078         GSequenceIter *iter;
1079
1080         DBG("session %p reason %s", session, reason2string(reason));
1081
1082         info->reason = reason;
1083
1084         iter = g_sequence_get_begin_iter(session->service_list);
1085
1086         while (g_sequence_iter_is_end(iter) == FALSE) {
1087                 entry = g_sequence_get(iter);
1088
1089                 switch (entry->state) {
1090                 case CONNMAN_SERVICE_STATE_ASSOCIATION:
1091                 case CONNMAN_SERVICE_STATE_CONFIGURATION:
1092                 case CONNMAN_SERVICE_STATE_READY:
1093                 case CONNMAN_SERVICE_STATE_ONLINE:
1094                 case CONNMAN_SERVICE_STATE_IDLE:
1095                 case CONNMAN_SERVICE_STATE_DISCONNECT:
1096                         select_service(info, entry);
1097                         return;
1098                 case CONNMAN_SERVICE_STATE_UNKNOWN:
1099                 case CONNMAN_SERVICE_STATE_FAILURE:
1100                         break;
1101                 }
1102
1103                 iter = g_sequence_iter_next(iter);
1104         }
1105 }
1106
1107 static struct service_entry *create_service_entry(struct connman_service *service,
1108                                         const char *name,
1109                                         enum connman_service_state state)
1110 {
1111         struct service_entry *entry;
1112         enum connman_service_type type;
1113         int idx;
1114
1115         entry = g_try_new0(struct service_entry, 1);
1116         if (entry == NULL)
1117                 return entry;
1118
1119         entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
1120         entry->state = state;
1121         if (name != NULL)
1122                 entry->name = name;
1123         else
1124                 entry->name = "";
1125         entry->service = service;
1126
1127         idx = __connman_service_get_index(entry->service);
1128         entry->ifname = connman_inet_ifname(idx);
1129         if (entry->ifname == NULL)
1130                 entry->ifname = g_strdup("");
1131
1132         type = connman_service_get_type(entry->service);
1133         entry->bearer = service2bearer(type);
1134
1135         return entry;
1136 }
1137
1138 static void destroy_service_entry(gpointer data)
1139 {
1140         struct service_entry *entry = data;
1141
1142         pending_timeout_remove_all(entry);
1143         g_free(entry->ifname);
1144
1145         g_free(entry);
1146 }
1147
1148 static void populate_service_list(struct connman_session *session)
1149 {
1150         struct service_entry *entry;
1151         GSequenceIter *iter;
1152
1153         session->service_hash =
1154                 g_hash_table_new_full(g_direct_hash, g_direct_equal,
1155                                         NULL, NULL);
1156         session->service_list = __connman_service_get_list(session,
1157                                                         service_match,
1158                                                         create_service_entry,
1159                                                         destroy_service_entry);
1160
1161         g_sequence_sort(session->service_list, sort_services, session);
1162
1163         iter = g_sequence_get_begin_iter(session->service_list);
1164
1165         while (g_sequence_iter_is_end(iter) == FALSE) {
1166                 entry = g_sequence_get(iter);
1167
1168                 DBG("service %p type %s name %s", entry->service,
1169                         service2bearer(connman_service_get_type(entry->service)),
1170                         entry->name);
1171
1172                 g_hash_table_replace(session->service_hash,
1173                                         entry->service, iter);
1174
1175                 iter = g_sequence_iter_next(iter);
1176         }
1177 }
1178
1179 static void session_changed(struct connman_session *session,
1180                                 enum connman_session_trigger trigger)
1181 {
1182         struct session_info *info = session->info;
1183         struct session_info *info_last = session->info_last;
1184         GSequenceIter *service_iter = NULL, *service_iter_last = NULL;
1185         GSequence *service_list_last;
1186         GHashTable *service_hash_last;
1187
1188         /*
1189          * TODO: This only a placeholder for the 'real' algorithm to
1190          * play a bit around. So we are going to improve it step by step.
1191          */
1192
1193         DBG("session %p trigger %s reason %s", session, trigger2string(trigger),
1194                                                 reason2string(info->reason));
1195
1196         if (info->entry != NULL) {
1197                 enum connman_session_state state;
1198
1199                 state = service_to_session_state(info->entry->state);
1200
1201                 if (is_type_matching_state(&state, info->type) == TRUE)
1202                         info->state = state;
1203         }
1204
1205         switch (trigger) {
1206         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
1207                 DBG("ignore session changed event");
1208                 return;
1209         case CONNMAN_SESSION_TRIGGER_SETTING:
1210                 if (info->allowed_bearers != info_last->allowed_bearers) {
1211
1212                         service_hash_last = session->service_hash;
1213                         service_list_last = session->service_list;
1214
1215                         populate_service_list(session);
1216
1217                         if (info->entry != NULL) {
1218                                 service_iter_last = g_hash_table_lookup(
1219                                                         service_hash_last,
1220                                                         info->entry->service);
1221                                 service_iter = g_hash_table_lookup(
1222                                                         session->service_hash,
1223                                                         info->entry->service);
1224                         }
1225
1226                         if (service_iter == NULL && service_iter_last != NULL) {
1227                                 /*
1228                                  * The currently selected service is
1229                                  * not part of this session anymore.
1230                                  */
1231                                 deselect_and_disconnect(session, info->reason);
1232                         }
1233
1234                         g_hash_table_remove_all(service_hash_last);
1235                         g_sequence_free(service_list_last);
1236                 }
1237
1238                 if (info->type != info_last->type) {
1239                         if (info->state >= CONNMAN_SESSION_STATE_CONNECTED &&
1240                                         is_type_matching_state(&info->state,
1241                                                         info->type) == FALSE)
1242                                 deselect_and_disconnect(session, info->reason);
1243                 }
1244
1245                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED) {
1246                         select_and_connect(session,
1247                                         CONNMAN_SESSION_REASON_FREE_RIDE);
1248                 }
1249
1250                 break;
1251         case CONNMAN_SESSION_TRIGGER_CONNECT:
1252                 if (info->state >= CONNMAN_SESSION_STATE_CONNECTED) {
1253                         if (info->entry->reason == CONNMAN_SESSION_REASON_CONNECT)
1254                                 break;
1255                         info->entry->reason = CONNMAN_SESSION_REASON_CONNECT;
1256                         __connman_service_session_inc(info->entry->service);
1257                         break;
1258                 }
1259
1260                 if (info->entry != NULL &&
1261                                 is_connecting(info->entry->state) == TRUE) {
1262                         break;
1263                 }
1264
1265                 select_and_connect(session,
1266                                 CONNMAN_SESSION_REASON_CONNECT);
1267
1268                 break;
1269         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
1270                 deselect_and_disconnect(session,
1271                                         CONNMAN_SESSION_REASON_DISCONNECT);
1272
1273                 break;
1274         case CONNMAN_SESSION_TRIGGER_PERIODIC:
1275                 if (info->state >= CONNMAN_SESSION_STATE_CONNECTED) {
1276                         info->entry->reason = CONNMAN_SESSION_REASON_PERIODIC;
1277                         __connman_service_session_inc(info->entry->service);
1278                         break;
1279                 }
1280
1281                 select_and_connect(session,
1282                                 CONNMAN_SESSION_REASON_PERIODIC);
1283
1284                 break;
1285         case CONNMAN_SESSION_TRIGGER_SERVICE:
1286                 if (info->entry != NULL &&
1287                         (is_connecting(info->entry->state) == TRUE ||
1288                                 is_connected(info->entry->state) == TRUE)) {
1289                         break;
1290                 }
1291
1292                 deselect_and_disconnect(session, info->reason);
1293
1294                 if (info->reason == CONNMAN_SESSION_REASON_FREE_RIDE ||
1295                                 info->stay_connected == TRUE) {
1296                         select_and_connect(session, info->reason);
1297                 }
1298
1299                 break;
1300         case CONNMAN_SESSION_TRIGGER_ECALL:
1301                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED &&
1302                                 info->entry != NULL &&
1303                                 info->entry->service != NULL) {
1304                         deselect_and_disconnect(session, info->reason);
1305                 }
1306
1307                 break;
1308         }
1309
1310         session_notify(session);
1311 }
1312
1313 static DBusMessage *connect_session(DBusConnection *conn,
1314                                         DBusMessage *msg, void *user_data)
1315 {
1316         struct connman_session *session = user_data;
1317         struct session_info *info = session->info;
1318
1319         DBG("session %p", session);
1320
1321         if (ecall_info != NULL && ecall_info != info)
1322                 return __connman_error_failed(msg, EBUSY);
1323
1324         session_changed(session, CONNMAN_SESSION_TRIGGER_CONNECT);
1325
1326         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1327 }
1328
1329 static DBusMessage *disconnect_session(DBusConnection *conn,
1330                                         DBusMessage *msg, void *user_data)
1331 {
1332         struct connman_session *session = user_data;
1333         struct session_info *info = session->info;
1334
1335         DBG("session %p", session);
1336
1337         if (ecall_info != NULL && ecall_info != info)
1338                 return __connman_error_failed(msg, EBUSY);
1339
1340         session_changed(session, CONNMAN_SESSION_TRIGGER_DISCONNECT);
1341
1342         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1343 }
1344
1345 static void update_ecall_sessions(struct connman_session *session)
1346 {
1347         struct session_info *info = session->info;
1348         struct connman_session *session_iter;
1349         GHashTableIter iter;
1350         gpointer key, value;
1351
1352         g_hash_table_iter_init(&iter, session_hash);
1353
1354         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1355                 session_iter = value;
1356
1357                 if (session_iter == session)
1358                         continue;
1359
1360                 session_iter->info->ecall = info->ecall;
1361
1362                 session_changed(session_iter, CONNMAN_SESSION_TRIGGER_ECALL);
1363         }
1364 }
1365
1366 static void update_ecall(struct connman_session *session)
1367 {
1368         struct session_info *info = session->info;
1369         struct session_info *info_last = session->info_last;
1370
1371         DBG("session %p ecall_info %p ecall %d -> %d", session,
1372                 ecall_info, info_last->ecall, info->ecall);
1373
1374         if (ecall_info == NULL) {
1375                 if (!(info_last->ecall == FALSE && info->ecall == TRUE))
1376                         goto err;
1377
1378                 ecall_info = info;
1379         } else if (ecall_info == info) {
1380                 if (!(info_last->ecall == TRUE && info->ecall == FALSE))
1381                         goto err;
1382
1383                 ecall_info = NULL;
1384         } else {
1385                 goto err;
1386         }
1387
1388         update_ecall_sessions(session);
1389
1390         return;
1391
1392 err:
1393         /* not a valid transition */
1394         info->ecall = info_last->ecall;
1395 }
1396
1397 static DBusMessage *change_session(DBusConnection *conn,
1398                                         DBusMessage *msg, void *user_data)
1399 {
1400         struct connman_session *session = user_data;
1401         struct session_info *info = session->info;
1402         DBusMessageIter iter, value;
1403         const char *name;
1404         const char *val;
1405         GSList *allowed_bearers;
1406
1407         DBG("session %p", session);
1408         if (dbus_message_iter_init(msg, &iter) == FALSE)
1409                 return __connman_error_invalid_arguments(msg);
1410
1411         dbus_message_iter_get_basic(&iter, &name);
1412         dbus_message_iter_next(&iter);
1413         dbus_message_iter_recurse(&iter, &value);
1414
1415         switch (dbus_message_iter_get_arg_type(&value)) {
1416         case DBUS_TYPE_ARRAY:
1417                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
1418                         allowed_bearers = session_parse_allowed_bearers(&value);
1419
1420                         g_slist_foreach(info->allowed_bearers,
1421                                         cleanup_bearer_info, NULL);
1422                         g_slist_free(info->allowed_bearers);
1423
1424                         if (allowed_bearers == NULL) {
1425                                 allowed_bearers = session_allowed_bearers_any();
1426
1427                                 if (allowed_bearers == NULL)
1428                                         return __connman_error_failed(msg, ENOMEM);
1429                         }
1430
1431                         info->allowed_bearers = allowed_bearers;
1432                 } else {
1433                         goto err;
1434                 }
1435                 break;
1436         case DBUS_TYPE_BOOLEAN:
1437                 if (g_str_equal(name, "Priority") == TRUE) {
1438                         dbus_message_iter_get_basic(&value,
1439                                         &info->priority);
1440                 } else if (g_str_equal(name, "AvoidHandover") == TRUE) {
1441                         dbus_message_iter_get_basic(&value,
1442                                         &info->avoid_handover);
1443                 } else if (g_str_equal(name, "StayConnected") == TRUE) {
1444                         dbus_message_iter_get_basic(&value,
1445                                         &info->stay_connected);
1446                 } else if (g_str_equal(name, "EmergencyCall") == TRUE) {
1447                         dbus_message_iter_get_basic(&value,
1448                                         &info->ecall);
1449
1450                         update_ecall(session);
1451                 } else {
1452                         goto err;
1453                 }
1454                 break;
1455         case DBUS_TYPE_UINT32:
1456                 if (g_str_equal(name, "PeriodicConnect") == TRUE) {
1457                         dbus_message_iter_get_basic(&value,
1458                                         &info->periodic_connect);
1459                 } else if (g_str_equal(name, "IdleTimeout") == TRUE) {
1460                         dbus_message_iter_get_basic(&value,
1461                                         &info->idle_timeout);
1462                 } else {
1463                         goto err;
1464                 }
1465                 break;
1466         case DBUS_TYPE_STRING:
1467                 if (g_str_equal(name, "ConnectionType") == TRUE) {
1468                         dbus_message_iter_get_basic(&value, &val);
1469                         info->type = string2type(val);
1470                 } else if (g_str_equal(name, "RoamingPolicy") == TRUE) {
1471                         dbus_message_iter_get_basic(&value, &val);
1472                         info->roaming_policy =
1473                                         string2roamingpolicy(val);
1474                 } else {
1475                         goto err;
1476                 }
1477                 break;
1478         default:
1479                 goto err;
1480         }
1481
1482         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1483
1484         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1485
1486 err:
1487         return __connman_error_invalid_arguments(msg);
1488 }
1489
1490 static void release_session(gpointer key, gpointer value, gpointer user_data)
1491 {
1492         struct connman_session *session = value;
1493         DBusMessage *message;
1494
1495         DBG("owner %s path %s", session->owner, session->notify_path);
1496
1497         if (session->notify_watch > 0)
1498                 g_dbus_remove_watch(connection, session->notify_watch);
1499
1500         g_dbus_unregister_interface(connection, session->session_path,
1501                                                 CONNMAN_SESSION_INTERFACE);
1502
1503         message = dbus_message_new_method_call(session->owner,
1504                                                 session->notify_path,
1505                                                 CONNMAN_NOTIFICATION_INTERFACE,
1506                                                 "Release");
1507         if (message == NULL)
1508                 return;
1509
1510         dbus_message_set_no_reply(message, TRUE);
1511
1512         g_dbus_send_message(connection, message);
1513 }
1514
1515 static int session_disconnect(struct connman_session *session)
1516 {
1517         DBG("session %p, %s", session, session->owner);
1518
1519         if (session->notify_watch > 0)
1520                 g_dbus_remove_watch(connection, session->notify_watch);
1521
1522         g_dbus_unregister_interface(connection, session->session_path,
1523                                                 CONNMAN_SESSION_INTERFACE);
1524
1525         deselect_and_disconnect(session,
1526                                 CONNMAN_SESSION_REASON_DISCONNECT);
1527
1528         g_hash_table_remove(session_hash, session->session_path);
1529
1530         return 0;
1531 }
1532
1533 static void owner_disconnect(DBusConnection *conn, void *user_data)
1534 {
1535         struct connman_session *session = user_data;
1536
1537         DBG("session %p, %s died", session, session->owner);
1538
1539         session_disconnect(session);
1540 }
1541
1542 static DBusMessage *destroy_session(DBusConnection *conn,
1543                                         DBusMessage *msg, void *user_data)
1544 {
1545         struct connman_session *session = user_data;
1546         struct session_info *info = session->info;
1547
1548         DBG("session %p", session);
1549
1550         if (ecall_info != NULL && ecall_info != info)
1551                 return __connman_error_failed(msg, EBUSY);
1552
1553         session_disconnect(session);
1554
1555         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1556 }
1557
1558 static const GDBusMethodTable session_methods[] = {
1559         { GDBUS_METHOD("Destroy", NULL, NULL, destroy_session) },
1560         { GDBUS_METHOD("Connect", NULL, NULL, connect_session) },
1561         { GDBUS_METHOD("Disconnect", NULL, NULL,
1562                         disconnect_session ) },
1563         { GDBUS_METHOD("Change",
1564                         GDBUS_ARGS({ "name", "s" }, { "value", "v" }),
1565                         NULL, change_session) },
1566         { },
1567 };
1568
1569 int __connman_session_create(DBusMessage *msg)
1570 {
1571         const char *owner, *notify_path;
1572         char *session_path = NULL;
1573         DBusMessageIter iter, array;
1574         struct connman_session *session = NULL;
1575         struct session_info *info, *info_last;
1576
1577         enum connman_session_type type = CONNMAN_SESSION_TYPE_ANY;
1578         connman_bool_t priority = FALSE, avoid_handover = FALSE;
1579         connman_bool_t stay_connected = FALSE, ecall = FALSE;
1580         enum connman_session_roaming_policy roaming_policy =
1581                                 CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
1582         GSList *allowed_bearers = NULL;
1583         unsigned int periodic_connect = 0;
1584         unsigned int idle_timeout = 0;
1585
1586         int err;
1587
1588         owner = dbus_message_get_sender(msg);
1589
1590         DBG("owner %s", owner);
1591
1592         if (ecall_info != NULL) {
1593                 /*
1594                  * If there is an emergency call already going on,
1595                  * ignore session creation attempt
1596                  */
1597                 err = -EBUSY;
1598                 goto err;
1599         }
1600
1601         dbus_message_iter_init(msg, &iter);
1602         dbus_message_iter_recurse(&iter, &array);
1603
1604         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1605                 DBusMessageIter entry, value;
1606                 const char *key, *val;
1607
1608                 dbus_message_iter_recurse(&array, &entry);
1609                 dbus_message_iter_get_basic(&entry, &key);
1610
1611                 dbus_message_iter_next(&entry);
1612                 dbus_message_iter_recurse(&entry, &value);
1613
1614                 switch (dbus_message_iter_get_arg_type(&value)) {
1615                 case DBUS_TYPE_ARRAY:
1616                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
1617                                 allowed_bearers =
1618                                         session_parse_allowed_bearers(&value);
1619                         } else {
1620                                 return -EINVAL;
1621                         }
1622                         break;
1623                 case DBUS_TYPE_BOOLEAN:
1624                         if (g_str_equal(key, "Priority") == TRUE) {
1625                                 dbus_message_iter_get_basic(&value,
1626                                                         &priority);
1627                         } else if (g_str_equal(key, "AvoidHandover") == TRUE) {
1628                                 dbus_message_iter_get_basic(&value,
1629                                                         &avoid_handover);
1630                         } else if (g_str_equal(key, "StayConnected") == TRUE) {
1631                                 dbus_message_iter_get_basic(&value,
1632                                                         &stay_connected);
1633                         } else if (g_str_equal(key, "EmergencyCall") == TRUE) {
1634                                 dbus_message_iter_get_basic(&value,
1635                                                         &ecall);
1636                         } else {
1637                                 return -EINVAL;
1638                         }
1639                         break;
1640                 case DBUS_TYPE_UINT32:
1641                         if (g_str_equal(key, "PeriodicConnect") == TRUE) {
1642                                 dbus_message_iter_get_basic(&value,
1643                                                         &periodic_connect);
1644                         } else if (g_str_equal(key, "IdleTimeout") == TRUE) {
1645                                 dbus_message_iter_get_basic(&value,
1646                                                         &idle_timeout);
1647                         } else {
1648                                 return -EINVAL;
1649                         }
1650                         break;
1651                 case DBUS_TYPE_STRING:
1652                         if (g_str_equal(key, "ConnectionType") == TRUE) {
1653                                 dbus_message_iter_get_basic(&value, &val);
1654                                 type = string2type(val);
1655                         } else if (g_str_equal(key, "RoamingPolicy") == TRUE) {
1656                                 dbus_message_iter_get_basic(&value, &val);
1657                                 roaming_policy = string2roamingpolicy(val);
1658                         } else {
1659                                 return -EINVAL;
1660                         }
1661                 }
1662                 dbus_message_iter_next(&array);
1663         }
1664
1665         dbus_message_iter_next(&iter);
1666         dbus_message_iter_get_basic(&iter, &notify_path);
1667
1668         if (notify_path == NULL) {
1669                 err = -EINVAL;
1670                 goto err;
1671         }
1672
1673         session_path = g_strdup_printf("/sessions%s", notify_path);
1674         if (session_path == NULL) {
1675                 err = -ENOMEM;
1676                 goto err;
1677         }
1678
1679         session = g_hash_table_lookup(session_hash, session_path);
1680         if (session != NULL) {
1681                 session = NULL;
1682                 err = -EEXIST;
1683                 goto err;
1684         }
1685
1686         session = g_try_new0(struct connman_session, 1);
1687         if (session == NULL) {
1688                 err = -ENOMEM;
1689                 goto err;
1690         }
1691
1692         session->info = g_try_new0(struct session_info, 1);
1693         if (session->info == NULL) {
1694                 err = -ENOMEM;
1695                 goto err;
1696         }
1697
1698         session->info_last = g_try_new0(struct session_info, 1);
1699         if (session->info_last == NULL) {
1700                 err = -ENOMEM;
1701                 goto err;
1702         }
1703
1704         info = session->info;
1705         info_last = session->info_last;
1706
1707         session->owner = g_strdup(owner);
1708         session->session_path = session_path;
1709         session->notify_path = g_strdup(notify_path);
1710         session->notify_watch =
1711                 g_dbus_add_disconnect_watch(connection, session->owner,
1712                                         owner_disconnect, session, NULL);
1713
1714         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
1715         info->type = type;
1716         info->priority = priority;
1717         info->avoid_handover = avoid_handover;
1718         info->stay_connected = stay_connected;
1719         info->periodic_connect = periodic_connect;
1720         info->idle_timeout = idle_timeout;
1721         info->ecall = ecall;
1722         info->roaming_policy = roaming_policy;
1723         info->entry = NULL;
1724         info->marker = 0;
1725
1726         if (allowed_bearers == NULL) {
1727                 info->allowed_bearers =
1728                                 session_allowed_bearers_any();
1729
1730                 if (info->allowed_bearers == NULL) {
1731                         err = -ENOMEM;
1732                         goto err;
1733                 }
1734         } else {
1735                 info->allowed_bearers = allowed_bearers;
1736         }
1737
1738         g_hash_table_replace(session_hash, session->session_path, session);
1739
1740         DBG("add %s", session->session_path);
1741
1742         if (g_dbus_register_interface(connection, session->session_path,
1743                                         CONNMAN_SESSION_INTERFACE,
1744                                         session_methods, NULL,
1745                                         NULL, session, NULL) == FALSE) {
1746                 connman_error("Failed to register %s", session->session_path);
1747                 g_hash_table_remove(session_hash, session->session_path);
1748                 session = NULL;
1749
1750                 err = -EINVAL;
1751                 goto err;
1752         }
1753
1754         g_dbus_send_reply(connection, msg,
1755                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1756                                 DBUS_TYPE_INVALID);
1757
1758
1759         populate_service_list(session);
1760         if (info->ecall == TRUE) {
1761                 ecall_info = info;
1762                 update_ecall_sessions(session);
1763         }
1764
1765         info_last->state = info->state;
1766         info_last->priority = info->priority;
1767         info_last->avoid_handover = info->avoid_handover;
1768         info_last->stay_connected = info->stay_connected;
1769         info_last->periodic_connect = info->periodic_connect;
1770         info_last->idle_timeout = info->idle_timeout;
1771         info_last->ecall = info->ecall;
1772         info_last->roaming_policy = info->roaming_policy;
1773         info_last->entry = info->entry;
1774         info_last->marker = info->marker;
1775         info_last->allowed_bearers = info->allowed_bearers;
1776
1777         session->append_all = TRUE;
1778
1779         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1780
1781         return 0;
1782
1783 err:
1784         connman_error("Failed to create session");
1785
1786         if (session != NULL) {
1787                 if (session->info_last != NULL)
1788                         g_free(session->info_last);
1789                 if (session->info != NULL)
1790                         g_free(session->info);
1791                 g_free(session);
1792         }
1793
1794         g_free(session_path);
1795
1796         g_slist_foreach(allowed_bearers, cleanup_bearer_info, NULL);
1797         g_slist_free(allowed_bearers);
1798
1799         return err;
1800 }
1801
1802 int __connman_session_destroy(DBusMessage *msg)
1803 {
1804         const char *owner, *session_path;
1805         struct connman_session *session;
1806
1807         owner = dbus_message_get_sender(msg);
1808
1809         DBG("owner %s", owner);
1810
1811         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1812                                                         DBUS_TYPE_INVALID);
1813         if (session_path == NULL)
1814                 return -EINVAL;
1815
1816         session = g_hash_table_lookup(session_hash, session_path);
1817         if (session == NULL)
1818                 return -EINVAL;
1819
1820         if (g_strcmp0(owner, session->owner) != 0)
1821                 return -EACCES;
1822
1823         session_disconnect(session);
1824
1825         return 0;
1826 }
1827
1828 connman_bool_t __connman_session_mode()
1829 {
1830         return sessionmode;
1831 }
1832
1833 void __connman_session_set_mode(connman_bool_t enable)
1834 {
1835         DBG("enable %d", enable);
1836
1837         if (sessionmode != enable) {
1838                 sessionmode = enable;
1839
1840                 connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
1841                                 CONNMAN_MANAGER_INTERFACE, "SessionMode",
1842                                 DBUS_TYPE_BOOLEAN, &sessionmode);
1843         }
1844
1845         if (sessionmode == TRUE)
1846                 __connman_service_disconnect_all();
1847 }
1848
1849 static void service_add(struct connman_service *service,
1850                         const char *name)
1851 {
1852         GHashTableIter iter;
1853         GSequenceIter *iter_service_list;
1854         gpointer key, value;
1855         struct connman_session *session;
1856         struct service_entry *entry;
1857
1858         DBG("service %p", service);
1859
1860         g_hash_table_iter_init(&iter, session_hash);
1861
1862         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1863                 session = value;
1864
1865                 if (service_match(session, service) == FALSE)
1866                         continue;
1867
1868                 entry = create_service_entry(service, name,
1869                                                 CONNMAN_SERVICE_STATE_IDLE);
1870                 if (entry == NULL)
1871                         continue;
1872
1873                 iter_service_list =
1874                         g_sequence_insert_sorted(session->service_list,
1875                                                         entry, sort_services,
1876                                                         session);
1877
1878                 g_hash_table_replace(session->service_hash, service,
1879                                         iter_service_list);
1880
1881                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1882         }
1883 }
1884
1885 static void service_remove(struct connman_service *service)
1886 {
1887
1888         GHashTableIter iter;
1889         gpointer key, value;
1890         struct connman_session *session;
1891         struct session_info *info;
1892
1893         DBG("service %p", service);
1894
1895         g_hash_table_iter_init(&iter, session_hash);
1896
1897         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1898                 GSequenceIter *iter;
1899                 session = value;
1900                 info = session->info;
1901
1902                 iter = g_hash_table_lookup(session->service_hash, service);
1903                 if (iter == NULL)
1904                         continue;
1905
1906                 g_sequence_remove(iter);
1907
1908                 if (info->entry != NULL && info->entry->service == service)
1909                         info->entry = NULL;
1910                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1911         }
1912 }
1913
1914 static void service_state_changed(struct connman_service *service,
1915                                         enum connman_service_state state)
1916 {
1917         GHashTableIter iter;
1918         gpointer key, value;
1919
1920         DBG("service %p state %d", service, state);
1921
1922         g_hash_table_iter_init(&iter, session_hash);
1923
1924         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1925                 struct connman_session *session = value;
1926                 GSequenceIter *service_iter;
1927
1928                 service_iter = g_hash_table_lookup(session->service_hash, service);
1929                 if (service_iter != NULL) {
1930                         struct service_entry *entry;
1931
1932                         entry = g_sequence_get(service_iter);
1933                         entry->state = state;
1934                 }
1935
1936                 session_changed(session,
1937                                 CONNMAN_SESSION_TRIGGER_SERVICE);
1938         }
1939 }
1940
1941 static void ipconfig_changed(struct connman_service *service,
1942                                 struct connman_ipconfig *ipconfig)
1943 {
1944         GHashTableIter iter;
1945         gpointer key, value;
1946         struct connman_session *session;
1947         struct session_info *info;
1948         enum connman_ipconfig_type type;
1949
1950         DBG("service %p ipconfig %p", service, ipconfig);
1951
1952         type = __connman_ipconfig_get_config_type(ipconfig);
1953
1954         g_hash_table_iter_init(&iter, session_hash);
1955
1956         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1957                 session = value;
1958                 info = session->info;
1959
1960                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED)
1961                         continue;
1962
1963                 if (info->entry != NULL && info->entry->service == service) {
1964                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
1965                                 ipconfig_ipv4_changed(session);
1966                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
1967                                 ipconfig_ipv6_changed(session);
1968                 }
1969         }
1970 }
1971
1972 static struct connman_notifier session_notifier = {
1973         .name                   = "session",
1974         .service_add            = service_add,
1975         .service_remove         = service_remove,
1976         .service_state_changed  = service_state_changed,
1977         .ipconfig_changed       = ipconfig_changed,
1978 };
1979
1980 int __connman_session_init(void)
1981 {
1982         int err;
1983
1984         DBG("");
1985
1986         connection = connman_dbus_get_connection();
1987         if (connection == NULL)
1988                 return -1;
1989
1990         err = connman_notifier_register(&session_notifier);
1991         if (err < 0) {
1992                 dbus_connection_unref(connection);
1993                 return err;
1994         }
1995
1996         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
1997                                                 NULL, cleanup_session);
1998
1999         sessionmode = FALSE;
2000         return 0;
2001 }
2002
2003 void __connman_session_cleanup(void)
2004 {
2005         DBG("");
2006
2007         if (connection == NULL)
2008                 return;
2009
2010         connman_notifier_unregister(&session_notifier);
2011
2012         g_hash_table_foreach(session_hash, release_session, NULL);
2013         g_hash_table_destroy(session_hash);
2014         session_hash = NULL;
2015
2016         dbus_connection_unref(connection);
2017 }