src/session.c

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