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         struct connman_session *session;
  64         /* track why this service was selected */
  65         enum connman_session_reason reason;
  66         enum connman_service_state state;
  67         const char *name;
  68         struct connman_service *service;
  69         char *ifname;
  70         const char *bearer;
  71         GSList *pending_timeouts;
  72 };
  73
  74 struct session_info {
  75         struct connman_session_config config;
  76         enum connman_session_state state;
  77         struct service_entry *entry;
  78         enum connman_session_reason reason;
  79 };
  80
  81 struct connman_session {
  82         char *owner;
  83         char *session_path;
  84         char *notify_path;
  85         guint notify_watch;
  86
  87         struct connman_session_policy *policy;
  88
  89         connman_bool_t append_all;
  90         struct session_info *info;
  91         struct session_info *info_last;
  92         struct connman_session_config *policy_config;
  93         GSList *user_allowed_bearers;
  94
  95         connman_bool_t ecall;
  96
  97         GSequence *service_list;
  98         GHashTable *service_hash;
  99 };
 100
 101 static const char *trigger2string(enum connman_session_trigger trigger)
 102 {
 103         switch (trigger) {
 104         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
 105                 break;
 106         case CONNMAN_SESSION_TRIGGER_SETTING:
 107                 return "setting";
 108         case CONNMAN_SESSION_TRIGGER_CONNECT:
 109                 return "connect";
 110         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
 111                 return "disconnect";
 112         case CONNMAN_SESSION_TRIGGER_SERVICE:
 113                 return "service";
 114         case CONNMAN_SESSION_TRIGGER_ECALL:
 115                 return "ecall";
 116         }
 117
 118         return NULL;
 119 }
 120
 121 static const char *reason2string(enum connman_session_reason reason)
 122 {
 123         switch (reason) {
 124         case CONNMAN_SESSION_REASON_UNKNOWN:
 125                 return "unknown";
 126         case CONNMAN_SESSION_REASON_CONNECT:
 127                 return "connect";
 128         case CONNMAN_SESSION_REASON_FREE_RIDE:
 129                 return "free-ride";
 130         }
 131
 132         return NULL;
 133 }
 134
 135 static const char *state2string(enum connman_session_state state)
 136 {
 137         switch (state) {
 138         case CONNMAN_SESSION_STATE_DISCONNECTED:
 139                 return "disconnected";
 140         case CONNMAN_SESSION_STATE_CONNECTED:
 141                 return "connected";
 142         case CONNMAN_SESSION_STATE_ONLINE:
 143                 return "online";
 144         }
 145
 146         return NULL;
 147 }
 148
 149 static const char *type2string(enum connman_session_type type)
 150 {
 151         switch (type) {
 152         case CONNMAN_SESSION_TYPE_UNKNOWN:
 153                 return "";
 154         case CONNMAN_SESSION_TYPE_ANY:
 155                 return "any";
 156         case CONNMAN_SESSION_TYPE_LOCAL:
 157                 return "local";
 158         case CONNMAN_SESSION_TYPE_INTERNET:
 159                 return "internet";
 160         }
 161
 162         return NULL;
 163 }
 164
 165 enum connman_session_roaming_policy connman_session_parse_roaming_policy(const char *policy)
 166 {
 167         if (g_strcmp0(policy, "default") == 0)
 168                 return CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 169         else if (g_strcmp0(policy, "always") == 0)
 170                 return CONNMAN_SESSION_ROAMING_POLICY_ALWAYS;
 171         else if (g_strcmp0(policy, "forbidden") == 0)
 172                 return CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
 173         else if (g_strcmp0(policy, "national") == 0)
 174                 return CONNMAN_SESSION_ROAMING_POLICY_NATIONAL;
 175         else if (g_strcmp0(policy, "international") == 0)
 176                 return CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL;
 177         else
 178                 return CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN;
 179 }
 180
 181 enum connman_session_type connman_session_parse_connection_type(const char *type)
 182 {
 183         if (g_strcmp0(type, "any") == 0)
 184                 return CONNMAN_SESSION_TYPE_ANY;
 185         if (g_strcmp0(type, "local") == 0)
 186                 return CONNMAN_SESSION_TYPE_LOCAL;
 187         else if (g_strcmp0(type, "internet") == 0)
 188                 return CONNMAN_SESSION_TYPE_INTERNET;
 189
 190         return CONNMAN_SESSION_TYPE_UNKNOWN;
 191 }
 192
 193 static int bearer2service(const char *bearer, enum connman_service_type *type)
 194 {
 195         if (g_strcmp0(bearer, "ethernet") == 0)
 196                 *type = CONNMAN_SERVICE_TYPE_ETHERNET;
 197         else if (g_strcmp0(bearer, "wifi") == 0)
 198                 *type = CONNMAN_SERVICE_TYPE_WIFI;
 199         else if (g_strcmp0(bearer, "bluetooth") == 0)
 200                 *type = CONNMAN_SERVICE_TYPE_BLUETOOTH;
 201         else if (g_strcmp0(bearer, "cellular") == 0)
 202                 *type = CONNMAN_SERVICE_TYPE_CELLULAR;
 203         else if (g_strcmp0(bearer, "vpn") == 0)
 204                 *type = CONNMAN_SERVICE_TYPE_VPN;
 205         else if (g_strcmp0(bearer, "*") == 0)
 206                 *type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 207         else
 208                 return -EINVAL;
 209
 210         return 0;
 211 }
 212
 213 static char *service2bearer(enum connman_service_type type)
 214 {
 215         switch (type) {
 216         case CONNMAN_SERVICE_TYPE_ETHERNET:
 217                 return "ethernet";
 218         case CONNMAN_SERVICE_TYPE_WIFI:
 219                 return "wifi";
 220         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 221                 return "bluetooth";
 222         case CONNMAN_SERVICE_TYPE_CELLULAR:
 223                 return "cellular";
 224         case CONNMAN_SERVICE_TYPE_VPN:
 225                 return "vpn";
 226         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 227                 return "*";
 228         case CONNMAN_SERVICE_TYPE_SYSTEM:
 229         case CONNMAN_SERVICE_TYPE_GPS:
 230         case CONNMAN_SERVICE_TYPE_GADGET:
 231                 return "";
 232         }
 233
 234         return "";
 235 }
 236
 237 static void destroy_policy_config(struct connman_session *session)
 238 {
 239         if (session->policy == NULL) {
 240                 g_free(session->policy_config);
 241                 return;
 242         }
 243
 244         (*session->policy->destroy)(session);
 245 }
 246
 247 static void free_session(struct connman_session *session)
 248 {
 249         if (session == NULL)
 250                 return;
 251
 252         if (session->notify_watch > 0)
 253                 g_dbus_remove_watch(connection, session->notify_watch);
 254
 255         destroy_policy_config(session);
 256         g_slist_free(session->info->config.allowed_bearers);
 257         g_free(session->owner);
 258         g_free(session->session_path);
 259         g_free(session->notify_path);
 260         g_free(session->info);
 261         g_free(session->info_last);
 262
 263         g_free(session);
 264 }
 265
 266 static void cleanup_session(gpointer user_data)
 267 {
 268         struct connman_session *session = user_data;
 269         struct session_info *info = session->info;
 270
 271         DBG("remove %s", session->session_path);
 272
 273         g_slist_free(session->user_allowed_bearers);
 274         g_hash_table_destroy(session->service_hash);
 275         g_sequence_free(session->service_list);
 276
 277         if (info->entry != NULL &&
 278                         info->entry->reason == CONNMAN_SESSION_REASON_CONNECT) {
 279                 __connman_service_disconnect(info->entry->service);
 280         }
 281
 282         free_session(session);
 283 }
 284
 285 static int assign_policy_plugin(struct connman_session *session)
 286 {
 287         if (session->policy != NULL)
 288                 return -EALREADY;
 289
 290         if (policy_list == NULL)
 291                 return 0;
 292
 293         session->policy = policy_list->data;
 294
 295         return 0;
 296 }
 297
 298 struct user_config {
 299         DBusMessage *pending;
 300
 301         enum connman_session_type type;
 302         GSList *allowed_bearers;
 303 };
 304
 305 static void cleanup_user_config(struct user_config *user_config)
 306 {
 307         if (user_config == NULL)
 308                 return;
 309
 310         if (user_config->pending != NULL)
 311                 dbus_message_unref(user_config->pending);
 312
 313         g_slist_free(user_config->allowed_bearers);
 314         g_free(user_config);
 315 }
 316
 317 static int create_policy_config(struct connman_session *session,
 318                                 connman_session_config_func_t cb,
 319                                 struct user_config *user_config)
 320 {
 321         struct connman_session_config *config;
 322
 323         if (session->policy == NULL) {
 324                 config = connman_session_create_default_config();
 325                 if (config == NULL) {
 326                         free_session(session);
 327                         cleanup_user_config(user_config);
 328                         return -ENOMEM;
 329                 }
 330
 331                 return cb(session, config, user_config, 0);
 332         }
 333
 334         return (*session->policy->create)(session, cb, user_config);
 335 }
 336
 337 static void probe_policy(struct connman_session_policy *policy)
 338 {
 339
 340         GHashTableIter iter;
 341         gpointer key, value;
 342         struct connman_session *session;
 343
 344         DBG("policy %p name %s", policy, policy->name);
 345
 346         g_hash_table_iter_init(&iter, session_hash);
 347
 348         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 349                 session = value;
 350
 351                 if (session->policy != NULL)
 352                         continue;
 353
 354                 assign_policy_plugin(session);
 355         }
 356 }
 357
 358 static void remove_policy(struct connman_session_policy *policy)
 359 {
 360         GHashTableIter iter;
 361         gpointer key, value;
 362         struct connman_session *session;
 363
 364         if (session_hash == NULL)
 365                 return;
 366
 367         DBG("policy %p name %s", policy, policy->name);
 368
 369         g_hash_table_iter_init(&iter, session_hash);
 370
 371         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 372                 session = value;
 373
 374                 if (session->policy != policy)
 375                         continue;
 376
 377                 session->policy = NULL;
 378                 assign_policy_plugin(session);
 379         }
 380 }
 381
 382 static gint compare_priority(gconstpointer a, gconstpointer b)
 383 {
 384         const struct connman_session_policy *policy1 = a;
 385         const struct connman_session_policy *policy2 = b;
 386
 387         return policy2->priority - policy1->priority;
 388 }
 389
 390
 391 int connman_session_policy_register(struct connman_session_policy *policy)
 392 {
 393         DBG("name %s", policy->name);
 394
 395         if (policy->create == NULL || policy->destroy == NULL)
 396                 return -EINVAL;
 397
 398         policy_list = g_slist_insert_sorted(policy_list, policy,
 399                                                 compare_priority);
 400
 401         probe_policy(policy);
 402
 403         return 0;
 404 }
 405
 406 void connman_session_policy_unregister(struct connman_session_policy *policy)
 407 {
 408         DBG("name %s", policy->name);
 409
 410         policy_list = g_slist_remove(policy_list, policy);
 411
 412         remove_policy(policy);
 413 }
 414
 415 void connman_session_set_default_config(struct connman_session_config *config)
 416 {
 417         config->priority = FALSE;
 418         config->roaming_policy = CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 419         config->type = CONNMAN_SESSION_TYPE_ANY;
 420         config->ecall = FALSE;
 421
 422         g_slist_free(config->allowed_bearers);
 423         config->allowed_bearers = g_slist_prepend(NULL,
 424                                 GINT_TO_POINTER(CONNMAN_SERVICE_TYPE_UNKNOWN));
 425 }
 426
 427 struct connman_session_config *connman_session_create_default_config(void)
 428 {
 429         struct connman_session_config *config;
 430
 431         config = g_new0(struct connman_session_config, 1);
 432         connman_session_set_default_config(config);
 433
 434         return config;
 435 }
 436
 437 static enum connman_session_type apply_policy_on_type(
 438                         enum connman_session_type policy,
 439                         enum connman_session_type type)
 440 {
 441         if (type == CONNMAN_SESSION_TYPE_UNKNOWN)
 442                 return CONNMAN_SESSION_TYPE_UNKNOWN;
 443
 444         if (policy == CONNMAN_SESSION_TYPE_ANY)
 445                 return type;
 446
 447         if (policy == CONNMAN_SESSION_TYPE_LOCAL)
 448                 return CONNMAN_SESSION_TYPE_LOCAL;
 449
 450         return CONNMAN_SESSION_TYPE_INTERNET;
 451 }
 452
 453 int connman_session_parse_bearers(const char *token, GSList **list)
 454 {
 455         enum connman_service_type bearer;
 456         int err;
 457
 458         if (g_strcmp0(token, "") == 0)
 459                 return 0;
 460
 461         err = bearer2service(token, &bearer);
 462         if (err < 0)
 463                 return err;
 464
 465         *list = g_slist_append(*list, GINT_TO_POINTER(bearer));
 466
 467         return 0;
 468 }
 469
 470 static int parse_bearers(DBusMessageIter *iter, GSList **list)
 471 {
 472         DBusMessageIter array;
 473         int type, err;
 474
 475         dbus_message_iter_recurse(iter, &array);
 476
 477         *list = NULL;
 478
 479         while ((type = dbus_message_iter_get_arg_type(&array)) !=
 480                         DBUS_TYPE_INVALID) {
 481                 char *bearer_name = NULL;
 482
 483                 if (type != DBUS_TYPE_STRING) {
 484                         g_slist_free(*list);
 485                         *list = NULL;
 486                         return -EINVAL;
 487                 }
 488
 489                 dbus_message_iter_get_basic(&array, &bearer_name);
 490
 491                 err = connman_session_parse_bearers(bearer_name, list);
 492                 if (err < 0) {
 493                         g_slist_free(*list);
 494                         *list = NULL;
 495                         return err;
 496                 }
 497
 498                 dbus_message_iter_next(&array);
 499         }
 500
 501         return 0;
 502 }
 503
 504 static int filter_bearer(GSList *policy_bearers,
 505                                 enum connman_service_type bearer,
 506                                 GSList **list)
 507 {
 508         enum connman_service_type policy;
 509         GSList *it;
 510
 511         if (policy_bearers == NULL)
 512                 return 0;
 513
 514         for (it = policy_bearers; it != NULL; it = it->next) {
 515                 policy = GPOINTER_TO_INT(it->data);
 516
 517                 if (bearer == CONNMAN_SERVICE_TYPE_UNKNOWN) {
 518                         bearer = policy;
 519                         goto clone;
 520                 }
 521
 522                 if (policy != CONNMAN_SERVICE_TYPE_UNKNOWN && policy != bearer)
 523                         continue;
 524
 525                 goto clone;
 526         }
 527
 528         *list = NULL;
 529
 530         return 0;
 531
 532 clone:
 533         *list = g_slist_append(*list, GINT_TO_POINTER(bearer));
 534
 535         return 0;
 536 }
 537
 538 static int apply_policy_on_bearers(GSList *policy_bearers, GSList *bearers,
 539                                 GSList **list)
 540 {
 541         enum connman_service_type bearer;
 542         GSList *it;
 543         int err;
 544
 545         *list = NULL;
 546
 547         for (it = bearers; it != NULL; it = it->next) {
 548                 bearer = GPOINTER_TO_INT(it->data);
 549
 550                 err = filter_bearer(policy_bearers, bearer, list);
 551                 if (err < 0)
 552                         return err;
 553         }
 554
 555         return 0;
 556 }
 557
 558 const char *connman_session_get_owner(struct connman_session *session)
 559 {
 560         return session->owner;
 561 }
 562
 563 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 564 {
 565         struct session_info *info = user_data;
 566         GSList *list;
 567
 568         for (list = info->config.allowed_bearers;
 569                         list != NULL; list = list->next) {
 570                 enum connman_service_type bearer = GPOINTER_TO_INT(list->data);
 571                 const char *name = __connman_service_type2string(bearer);
 572
 573                 if (name == NULL)
 574                         name = "*";
 575
 576                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 577                                                 &name);
 578         }
 579 }
 580
 581 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 582 {
 583         struct connman_service *service = user_data;
 584         struct connman_ipconfig *ipconfig_ipv4;
 585
 586         if (service == NULL)
 587                 return;
 588
 589         if (__connman_service_is_connected_state(service,
 590                                 CONNMAN_IPCONFIG_TYPE_IPV4) == FALSE) {
 591                 return;
 592         }
 593
 594         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 595         if (ipconfig_ipv4 == NULL)
 596                 return;
 597
 598         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 599 }
 600
 601 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 602 {
 603         struct connman_service *service = user_data;
 604         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 605
 606         if (service == NULL)
 607                 return;
 608
 609         if (__connman_service_is_connected_state(service,
 610                                 CONNMAN_IPCONFIG_TYPE_IPV6) == FALSE) {
 611                 return;
 612         }
 613
 614         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 615         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 616         if (ipconfig_ipv6 == NULL)
 617                 return;
 618
 619         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 620 }
 621
 622 static void append_notify(DBusMessageIter *dict,
 623                                         struct connman_session *session)
 624 {
 625         struct session_info *info = session->info;
 626         struct session_info *info_last = session->info_last;
 627         struct connman_service *service;
 628         const char *name, *ifname, *bearer;
 629
 630         if (session->append_all == TRUE ||
 631                         info->state != info_last->state) {
 632                 const char *state = state2string(info->state);
 633
 634                 connman_dbus_dict_append_basic(dict, "State",
 635                                                 DBUS_TYPE_STRING,
 636                                                 &state);
 637                 info_last->state = info->state;
 638         }
 639
 640         if (session->append_all == TRUE ||
 641                         info->entry != info_last->entry) {
 642                 if (info->entry == NULL) {
 643                         name = "";
 644                         ifname = "";
 645                         service = NULL;
 646                         bearer = "";
 647                 } else {
 648                         name = info->entry->name;
 649                         ifname = info->entry->ifname;
 650                         service = info->entry->service;
 651                         bearer = info->entry->bearer;
 652                 }
 653
 654                 connman_dbus_dict_append_basic(dict, "Name",
 655                                                 DBUS_TYPE_STRING,
 656                                                 &name);
 657
 658                 connman_dbus_dict_append_dict(dict, "IPv4",
 659                                                 append_ipconfig_ipv4,
 660                                                 service);
 661
 662                 connman_dbus_dict_append_dict(dict, "IPv6",
 663                                                 append_ipconfig_ipv6,
 664                                                 service);
 665
 666                 connman_dbus_dict_append_basic(dict, "Interface",
 667                                                 DBUS_TYPE_STRING,
 668                                                 &ifname);
 669
 670                 connman_dbus_dict_append_basic(dict, "Bearer",
 671                                                 DBUS_TYPE_STRING,
 672                                                 &bearer);
 673
 674                 info_last->entry = info->entry;
 675         }
 676
 677         if (session->append_all == TRUE ||
 678                         info->config.type != info_last->config.type) {
 679                 const char *type = type2string(info->config.type);
 680
 681                 connman_dbus_dict_append_basic(dict, "ConnectionType",
 682                                                 DBUS_TYPE_STRING,
 683                                                 &type);
 684                 info_last->config.type = info->config.type;
 685         }
 686
 687         if (session->append_all == TRUE ||
 688                         info->config.allowed_bearers != info_last->config.allowed_bearers) {
 689                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 690                                                 DBUS_TYPE_STRING,
 691                                                 append_allowed_bearers,
 692                                                 info);
 693                 info_last->config.allowed_bearers = info->config.allowed_bearers;
 694         }
 695
 696         session->append_all = FALSE;
 697 }
 698
 699 static connman_bool_t is_type_matching_state(enum connman_session_state *state,
 700                                                 enum connman_session_type type)
 701 {
 702         switch (type) {
 703         case CONNMAN_SESSION_TYPE_UNKNOWN:
 704                 return FALSE;
 705         case CONNMAN_SESSION_TYPE_ANY:
 706                 return TRUE;
 707         case CONNMAN_SESSION_TYPE_LOCAL:
 708                 if (*state >= CONNMAN_SESSION_STATE_CONNECTED) {
 709                         *state = CONNMAN_SESSION_STATE_CONNECTED;
 710                         return TRUE;
 711                 }
 712
 713                 break;
 714         case CONNMAN_SESSION_TYPE_INTERNET:
 715                 if (*state == CONNMAN_SESSION_STATE_ONLINE)
 716                         return TRUE;
 717                 break;
 718         }
 719
 720         return FALSE;
 721 }
 722
 723 static connman_bool_t compute_notifiable_changes(struct connman_session *session)
 724 {
 725         struct session_info *info_last = session->info_last;
 726         struct session_info *info = session->info;
 727
 728         if (session->append_all == TRUE)
 729                 return TRUE;
 730
 731         if (info->state != info_last->state)
 732                 return TRUE;
 733
 734         if (info->entry != info_last->entry &&
 735                         info->state >= CONNMAN_SESSION_STATE_CONNECTED)
 736                 return TRUE;
 737
 738         if (info->config.allowed_bearers != info_last->config.allowed_bearers ||
 739                         info->config.type != info_last->config.type)
 740                 return TRUE;
 741
 742         return FALSE;
 743 }
 744
 745 static gboolean session_notify(gpointer user_data)
 746 {
 747         struct connman_session *session = user_data;
 748         DBusMessage *msg;
 749         DBusMessageIter array, dict;
 750
 751         if (compute_notifiable_changes(session) == FALSE)
 752                 return FALSE;
 753
 754         DBG("session %p owner %s notify_path %s", session,
 755                 session->owner, session->notify_path);
 756
 757         msg = dbus_message_new_method_call(session->owner, session->notify_path,
 758                                                 CONNMAN_NOTIFICATION_INTERFACE,
 759                                                 "Update");
 760         if (msg == NULL)
 761                 return FALSE;
 762
 763         dbus_message_iter_init_append(msg, &array);
 764         connman_dbus_dict_open(&array, &dict);
 765
 766         append_notify(&dict, session);
 767
 768         connman_dbus_dict_close(&array, &dict);
 769
 770         g_dbus_send_message(connection, msg);
 771
 772         return FALSE;
 773 }
 774
 775 static void ipconfig_ipv4_changed(struct connman_session *session)
 776 {
 777         struct session_info *info = session->info;
 778
 779         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 780                                                 "IPv4", append_ipconfig_ipv4,
 781                                                 info->entry->service);
 782 }
 783
 784 static void ipconfig_ipv6_changed(struct connman_session *session)
 785 {
 786         struct session_info *info = session->info;
 787
 788         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 789                                                 "IPv6", append_ipconfig_ipv6,
 790                                                 info->entry->service);
 791 }
 792
 793 static connman_bool_t service_type_match(struct connman_session *session,
 794                                         struct connman_service *service)
 795 {
 796         struct session_info *info = session->info;
 797         GSList *list;
 798
 799         for (list = info->config.allowed_bearers;
 800                         list != NULL; list = list->next) {
 801                 enum connman_service_type bearer = GPOINTER_TO_INT(list->data);
 802                 enum connman_service_type service_type;
 803
 804                 if (bearer == CONNMAN_SERVICE_TYPE_UNKNOWN)
 805                         return TRUE;
 806
 807                 service_type = connman_service_get_type(service);
 808                 if (bearer == service_type)
 809                         return TRUE;
 810         }
 811
 812         return FALSE;
 813 }
 814
 815 static connman_bool_t service_match(struct connman_session *session,
 816                                         struct connman_service *service)
 817 {
 818         if (service_type_match(session, service) == FALSE)
 819                 return FALSE;
 820
 821         return TRUE;
 822 }
 823
 824 static int service_type_weight(enum connman_service_type type)
 825 {
 826         /*
 827          * The session doesn't care which service
 828          * to use. Nevertheless we have to sort them
 829          * according their type. The ordering is
 830          *
 831          * 1. Ethernet
 832          * 2. Bluetooth
 833          * 3. WiFi
 834          * 4. Cellular
 835          */
 836
 837         switch (type) {
 838         case CONNMAN_SERVICE_TYPE_ETHERNET:
 839                 return 4;
 840         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 841                 return 3;
 842         case CONNMAN_SERVICE_TYPE_WIFI:
 843                 return 2;
 844         case CONNMAN_SERVICE_TYPE_CELLULAR:
 845                 return 1;
 846         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 847         case CONNMAN_SERVICE_TYPE_SYSTEM:
 848         case CONNMAN_SERVICE_TYPE_GPS:
 849         case CONNMAN_SERVICE_TYPE_VPN:
 850         case CONNMAN_SERVICE_TYPE_GADGET:
 851                 break;
 852         }
 853
 854         return 0;
 855 }
 856
 857 static gint sort_allowed_bearers(struct connman_service *service_a,
 858                                         struct connman_service *service_b,
 859                                         struct connman_session *session)
 860 {
 861         struct session_info *info = session->info;
 862         GSList *list;
 863         enum connman_service_type type_a, type_b;
 864         int weight_a, weight_b;
 865
 866         type_a = connman_service_get_type(service_a);
 867         type_b = connman_service_get_type(service_b);
 868
 869         for (list = info->config.allowed_bearers;
 870                         list != NULL; list = list->next) {
 871                 enum connman_service_type bearer = GPOINTER_TO_INT(list->data);
 872
 873                 if (bearer == CONNMAN_SERVICE_TYPE_UNKNOWN) {
 874                         if (type_a != type_b) {
 875                                 weight_a = service_type_weight(type_a);
 876                                 weight_b = service_type_weight(type_b);
 877
 878                                 if (weight_a > weight_b)
 879                                         return -1;
 880
 881                                 if (weight_a < weight_b)
 882                                         return 1;
 883
 884                                 return 0;
 885                         }
 886                 }
 887
 888                 if (type_a == bearer && type_b == bearer)
 889                         return 0;
 890
 891                 if (type_a == bearer && type_b != bearer)
 892                         return -1;
 893
 894                 if (type_a != bearer && type_b == bearer)
 895                         return 1;
 896         }
 897
 898         return 0;
 899 }
 900
 901 static gint sort_services(gconstpointer a, gconstpointer b, gpointer user_data)
 902 {
 903         struct service_entry *entry_a = (void *)a;
 904         struct service_entry *entry_b = (void *)b;
 905         struct connman_session *session = user_data;
 906
 907         return sort_allowed_bearers(entry_a->service, entry_b->service,
 908                                 session);
 909 }
 910
 911 static enum connman_session_state service_to_session_state(enum connman_service_state state)
 912 {
 913         switch (state) {
 914         case CONNMAN_SERVICE_STATE_UNKNOWN:
 915         case CONNMAN_SERVICE_STATE_IDLE:
 916         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 917         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 918         case CONNMAN_SERVICE_STATE_DISCONNECT:
 919         case CONNMAN_SERVICE_STATE_FAILURE:
 920                 break;
 921         case CONNMAN_SERVICE_STATE_READY:
 922                 return CONNMAN_SESSION_STATE_CONNECTED;
 923         case CONNMAN_SERVICE_STATE_ONLINE:
 924                 return CONNMAN_SESSION_STATE_ONLINE;
 925         }
 926
 927         return CONNMAN_SESSION_STATE_DISCONNECTED;
 928 }
 929
 930 static connman_bool_t is_connected(enum connman_service_state state)
 931 {
 932         switch (state) {
 933         case CONNMAN_SERVICE_STATE_UNKNOWN:
 934         case CONNMAN_SERVICE_STATE_IDLE:
 935         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 936         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 937         case CONNMAN_SERVICE_STATE_DISCONNECT:
 938         case CONNMAN_SERVICE_STATE_FAILURE:
 939                 break;
 940         case CONNMAN_SERVICE_STATE_READY:
 941         case CONNMAN_SERVICE_STATE_ONLINE:
 942                 return TRUE;
 943         }
 944
 945         return FALSE;
 946 }
 947
 948 static connman_bool_t is_connecting(enum connman_service_state state)
 949 {
 950         switch (state) {
 951         case CONNMAN_SERVICE_STATE_UNKNOWN:
 952         case CONNMAN_SERVICE_STATE_IDLE:
 953                 break;
 954         case CONNMAN_SERVICE_STATE_ASSOCIATION:
 955         case CONNMAN_SERVICE_STATE_CONFIGURATION:
 956                 return TRUE;
 957         case CONNMAN_SERVICE_STATE_DISCONNECT:
 958         case CONNMAN_SERVICE_STATE_FAILURE:
 959         case CONNMAN_SERVICE_STATE_READY:
 960         case CONNMAN_SERVICE_STATE_ONLINE:
 961                 break;
 962         }
 963
 964         return FALSE;
 965 }
 966
 967 static connman_bool_t explicit_connect(enum connman_session_reason reason)
 968 {
 969         switch (reason) {
 970         case CONNMAN_SESSION_REASON_UNKNOWN:
 971         case CONNMAN_SESSION_REASON_FREE_RIDE:
 972                 break;
 973         case CONNMAN_SESSION_REASON_CONNECT:
 974                 return TRUE;
 975         }
 976
 977         return FALSE;
 978 }
 979
 980 static connman_bool_t explicit_disconnect(struct session_info *info)
 981 {
 982         if (info->entry == NULL)
 983                 return FALSE;
 984
 985         DBG("reason %s service %p state %d",
 986                 reason2string(info->entry->reason),
 987                 info->entry->service, info->entry->state);
 988
 989         if (info->entry->reason == CONNMAN_SESSION_REASON_UNKNOWN)
 990                 return FALSE;
 991
 992         if (explicit_connect(info->entry->reason) == FALSE)
 993                 return FALSE;
 994
 995         if (__connman_service_session_dec(info->entry->service) == FALSE)
 996                 return FALSE;
 997
 998         return TRUE;
 999 }
1000
1001 struct pending_data {
1002         unsigned int timeout;
1003         struct service_entry *entry;
1004         gboolean (*cb)(gpointer);
1005 };
1006
1007 static void pending_timeout_free(gpointer data, gpointer user_data)
1008 {
1009         struct pending_data *pending = data;
1010
1011         DBG("pending %p timeout %d", pending, pending->timeout);
1012         g_source_remove(pending->timeout);
1013         g_free(pending);
1014 }
1015
1016 static void pending_timeout_remove_all(struct service_entry *entry)
1017 {
1018         DBG("");
1019
1020         g_slist_foreach(entry->pending_timeouts, pending_timeout_free, NULL);
1021         g_slist_free(entry->pending_timeouts);
1022         entry->pending_timeouts = NULL;
1023 }
1024
1025 static gboolean pending_timeout_cb(gpointer data)
1026 {
1027         struct pending_data *pending = data;
1028         struct service_entry *entry = pending->entry;
1029         gboolean ret;
1030
1031         DBG("pending %p timeout %d", pending, pending->timeout);
1032
1033         ret = pending->cb(pending->entry);
1034         if (ret == FALSE) {
1035                 entry->pending_timeouts =
1036                         g_slist_remove(entry->pending_timeouts,
1037                                         pending);
1038                 g_free(pending);
1039         }
1040         return ret;
1041 }
1042
1043 static connman_bool_t pending_timeout_add(unsigned int seconds,
1044                                         gboolean (*cb)(gpointer),
1045                                         struct service_entry *entry)
1046 {
1047         struct pending_data *pending = g_try_new0(struct pending_data, 1);
1048
1049         if (pending == NULL || cb == NULL || entry == NULL) {
1050                 g_free(pending);
1051                 return FALSE;
1052         }
1053
1054         pending->cb = cb;
1055         pending->entry = entry;
1056         pending->timeout = g_timeout_add_seconds(seconds, pending_timeout_cb,
1057                                                 pending);
1058         entry->pending_timeouts = g_slist_prepend(entry->pending_timeouts,
1059                                                 pending);
1060
1061         DBG("pending %p entry %p timeout id %d", pending, entry,
1062                 pending->timeout);
1063
1064         return TRUE;
1065 }
1066
1067 static gboolean call_disconnect(gpointer user_data)
1068 {
1069         struct service_entry *entry = user_data;
1070         struct connman_service *service = entry->service;
1071
1072         /*
1073          * TODO: We should mark this entry as pending work. In case
1074          * disconnect fails we just unassign this session from the
1075          * service and can't do anything later on it
1076          */
1077         DBG("disconnect service %p", service);
1078         __connman_service_disconnect(service);
1079
1080         return FALSE;
1081 }
1082
1083 static gboolean call_connect(gpointer user_data)
1084 {
1085         struct service_entry *entry = user_data;
1086         struct connman_service *service = entry->service;
1087
1088         DBG("connect service %p", service);
1089         __connman_service_connect(service);
1090
1091         return FALSE;
1092 }
1093
1094 static void deselect_service(struct session_info *info)
1095 {
1096         struct service_entry *entry;
1097         connman_bool_t disconnect, connected;
1098
1099         DBG("");
1100
1101         if (info->entry == NULL)
1102                 return;
1103
1104         disconnect = explicit_disconnect(info);
1105
1106         connected = is_connecting(info->entry->state) == TRUE ||
1107                         is_connected(info->entry->state) == TRUE;
1108
1109         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
1110         info->entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
1111
1112         entry = info->entry;
1113         info->entry = NULL;
1114
1115         DBG("disconnect %d connected %d", disconnect, connected);
1116
1117         if (disconnect == TRUE && connected == TRUE)
1118                 pending_timeout_add(0, call_disconnect, entry);
1119 }
1120
1121 static void deselect_and_disconnect(struct connman_session *session)
1122 {
1123         struct session_info *info = session->info;
1124
1125         deselect_service(info);
1126
1127         info->reason = CONNMAN_SESSION_REASON_FREE_RIDE;
1128 }
1129
1130 static void select_connected_service(struct session_info *info,
1131                                         struct service_entry *entry)
1132 {
1133         enum connman_session_state state;
1134
1135         state = service_to_session_state(entry->state);
1136         if (is_type_matching_state(&state, info->config.type) == FALSE)
1137                 return;
1138
1139         info->state = state;
1140
1141         info->entry = entry;
1142         info->entry->reason = info->reason;
1143
1144         if (explicit_connect(info->reason) == FALSE)
1145                 return;
1146
1147         __connman_service_session_inc(info->entry->service);
1148 }
1149
1150 static void select_offline_service(struct session_info *info,
1151                                         struct service_entry *entry)
1152 {
1153         if (explicit_connect(info->reason) == FALSE)
1154                 return;
1155
1156         info->state = service_to_session_state(entry->state);
1157
1158         info->entry = entry;
1159         info->entry->reason = info->reason;
1160
1161         __connman_service_session_inc(info->entry->service);
1162         pending_timeout_add(0, call_connect, entry);
1163 }
1164
1165 static void select_service(struct session_info *info,
1166                                 struct service_entry *entry)
1167 {
1168         DBG("service %p", entry->service);
1169
1170         if (is_connected(entry->state) == TRUE)
1171                 select_connected_service(info, entry);
1172         else
1173                 select_offline_service(info, entry);
1174 }
1175
1176 static void select_and_connect(struct connman_session *session,
1177                                 enum connman_session_reason reason)
1178 {
1179         struct session_info *info = session->info;
1180         struct service_entry *entry = NULL;
1181         GSequenceIter *iter;
1182
1183         DBG("session %p reason %s", session, reason2string(reason));
1184
1185         info->reason = reason;
1186
1187         iter = g_sequence_get_begin_iter(session->service_list);
1188
1189         while (g_sequence_iter_is_end(iter) == FALSE) {
1190                 entry = g_sequence_get(iter);
1191
1192                 switch (entry->state) {
1193                 case CONNMAN_SERVICE_STATE_ASSOCIATION:
1194                 case CONNMAN_SERVICE_STATE_CONFIGURATION:
1195                 case CONNMAN_SERVICE_STATE_READY:
1196                 case CONNMAN_SERVICE_STATE_ONLINE:
1197                 case CONNMAN_SERVICE_STATE_IDLE:
1198                 case CONNMAN_SERVICE_STATE_DISCONNECT:
1199                         select_service(info, entry);
1200                         return;
1201                 case CONNMAN_SERVICE_STATE_UNKNOWN:
1202                 case CONNMAN_SERVICE_STATE_FAILURE:
1203                         break;
1204                 }
1205
1206                 iter = g_sequence_iter_next(iter);
1207         }
1208 }
1209
1210 static struct service_entry *create_service_entry(struct connman_session * session,
1211                                         struct connman_service *service,
1212                                         const char *name,
1213                                         enum connman_service_state state)
1214 {
1215         struct service_entry *entry;
1216         enum connman_service_type type;
1217         int idx;
1218
1219         entry = g_try_new0(struct service_entry, 1);
1220         if (entry == NULL)
1221                 return entry;
1222
1223         entry->reason = CONNMAN_SESSION_REASON_UNKNOWN;
1224         entry->state = state;
1225         if (name != NULL)
1226                 entry->name = name;
1227         else
1228                 entry->name = "";
1229         entry->service = service;
1230
1231         idx = __connman_service_get_index(entry->service);
1232         entry->ifname = connman_inet_ifname(idx);
1233         if (entry->ifname == NULL)
1234                 entry->ifname = g_strdup("");
1235
1236         type = connman_service_get_type(entry->service);
1237         entry->bearer = service2bearer(type);
1238
1239         entry->session = session;
1240
1241         return entry;
1242 }
1243
1244 static void destroy_service_entry(gpointer data)
1245 {
1246         struct service_entry *entry = data;
1247
1248         pending_timeout_remove_all(entry);
1249         g_free(entry->ifname);
1250
1251         g_free(entry);
1252 }
1253
1254 static void populate_service_list(struct connman_session *session)
1255 {
1256         struct service_entry *entry;
1257         GSequenceIter *iter;
1258
1259         session->service_hash =
1260                 g_hash_table_new_full(g_direct_hash, g_direct_equal,
1261                                         NULL, NULL);
1262         session->service_list = __connman_service_get_list(session,
1263                                                         service_match,
1264                                                         create_service_entry,
1265                                                         destroy_service_entry);
1266
1267         g_sequence_sort(session->service_list, sort_services, session);
1268
1269         iter = g_sequence_get_begin_iter(session->service_list);
1270
1271         while (g_sequence_iter_is_end(iter) == FALSE) {
1272                 entry = g_sequence_get(iter);
1273
1274                 DBG("service %p type %s name %s", entry->service,
1275                         service2bearer(connman_service_get_type(entry->service)),
1276                         entry->name);
1277
1278                 g_hash_table_replace(session->service_hash,
1279                                         entry->service, iter);
1280
1281                 iter = g_sequence_iter_next(iter);
1282         }
1283 }
1284
1285 static void session_changed(struct connman_session *session,
1286                                 enum connman_session_trigger trigger)
1287 {
1288         struct session_info *info = session->info;
1289         struct session_info *info_last = session->info_last;
1290         GSequenceIter *service_iter = NULL, *service_iter_last = NULL;
1291         GSequence *service_list_last;
1292         GHashTable *service_hash_last;
1293
1294         /*
1295          * TODO: This only a placeholder for the 'real' algorithm to
1296          * play a bit around. So we are going to improve it step by step.
1297          */
1298
1299         DBG("session %p trigger %s reason %s", session, trigger2string(trigger),
1300                                                 reason2string(info->reason));
1301
1302         if (info->entry != NULL) {
1303                 enum connman_session_state state;
1304
1305                 state = service_to_session_state(info->entry->state);
1306
1307                 if (is_type_matching_state(&state, info->config.type) == TRUE)
1308                         info->state = state;
1309         }
1310
1311         switch (trigger) {
1312         case CONNMAN_SESSION_TRIGGER_UNKNOWN:
1313                 DBG("ignore session changed event");
1314                 return;
1315         case CONNMAN_SESSION_TRIGGER_SETTING:
1316                 if (info->config.allowed_bearers != info_last->config.allowed_bearers) {
1317
1318                         service_hash_last = session->service_hash;
1319                         service_list_last = session->service_list;
1320
1321                         populate_service_list(session);
1322
1323                         if (info->entry != NULL) {
1324                                 service_iter_last = g_hash_table_lookup(
1325                                                         service_hash_last,
1326                                                         info->entry->service);
1327                                 service_iter = g_hash_table_lookup(
1328                                                         session->service_hash,
1329                                                         info->entry->service);
1330                         }
1331
1332                         if (service_iter == NULL && service_iter_last != NULL) {
1333                                 /*
1334                                  * The currently selected service is
1335                                  * not part of this session anymore.
1336                                  */
1337                                 deselect_and_disconnect(session);
1338                         }
1339
1340                         g_hash_table_remove_all(service_hash_last);
1341                         g_sequence_free(service_list_last);
1342                 }
1343
1344                 if (info->config.type != info_last->config.type) {
1345                         if (info->state >= CONNMAN_SESSION_STATE_CONNECTED &&
1346                                         is_type_matching_state(&info->state,
1347                                                         info->config.type) == FALSE)
1348                                 deselect_and_disconnect(session);
1349                 }
1350
1351                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED) {
1352                         select_and_connect(session,
1353                                         CONNMAN_SESSION_REASON_FREE_RIDE);
1354                 }
1355
1356                 break;
1357         case CONNMAN_SESSION_TRIGGER_ECALL:
1358                 /*
1359                  * For the time beeing we fallback to normal connect
1360                  * strategy.
1361                  */
1362         case CONNMAN_SESSION_TRIGGER_CONNECT:
1363                 if (info->state >= CONNMAN_SESSION_STATE_CONNECTED) {
1364                         if (info->entry->reason == CONNMAN_SESSION_REASON_CONNECT)
1365                                 break;
1366                         info->entry->reason = CONNMAN_SESSION_REASON_CONNECT;
1367                         __connman_service_session_inc(info->entry->service);
1368                         break;
1369                 }
1370
1371                 if (info->entry != NULL &&
1372                                 is_connecting(info->entry->state) == TRUE) {
1373                         break;
1374                 }
1375
1376                 select_and_connect(session,
1377                                 CONNMAN_SESSION_REASON_CONNECT);
1378
1379                 break;
1380         case CONNMAN_SESSION_TRIGGER_DISCONNECT:
1381                 deselect_and_disconnect(session);
1382
1383                 break;
1384         case CONNMAN_SESSION_TRIGGER_SERVICE:
1385                 if (info->entry != NULL &&
1386                         (is_connecting(info->entry->state) == TRUE ||
1387                                 is_connected(info->entry->state) == TRUE)) {
1388                         break;
1389                 }
1390
1391                 deselect_and_disconnect(session);
1392
1393                 if (info->reason == CONNMAN_SESSION_REASON_FREE_RIDE) {
1394                         select_and_connect(session, info->reason);
1395                 }
1396
1397                 break;
1398         }
1399
1400         session_notify(session);
1401 }
1402
1403 int connman_session_config_update(struct connman_session *session)
1404 {
1405         struct session_info *info = session->info;
1406         GSList *allowed_bearers;
1407         int err;
1408
1409         DBG("session %p", session);
1410
1411         /*
1412          * We update all configuration even though only one entry
1413          * might have changed. We can still optimize this later.
1414          */
1415
1416         err = apply_policy_on_bearers(
1417                 session->policy_config->allowed_bearers,
1418                 session->user_allowed_bearers,
1419                 &allowed_bearers);
1420         if (err < 0)
1421                 return err;
1422
1423         g_slist_free(info->config.allowed_bearers);
1424         info->config.allowed_bearers = allowed_bearers;
1425
1426         info->config.type = apply_policy_on_type(
1427                                 session->policy_config->type,
1428                                 info->config.type);
1429
1430         info->config.roaming_policy = session->policy_config->roaming_policy;
1431
1432         info->config.ecall = session->policy_config->ecall;
1433         if (info->config.ecall == TRUE)
1434                 ecall_session = session;
1435
1436         info->config.priority = session->policy_config->priority;
1437
1438         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1439
1440         return 0;
1441 }
1442
1443 static DBusMessage *connect_session(DBusConnection *conn,
1444                                         DBusMessage *msg, void *user_data)
1445 {
1446         struct connman_session *session = user_data;
1447
1448         DBG("session %p", session);
1449
1450         if (ecall_session != NULL) {
1451                 if (ecall_session->ecall == TRUE && ecall_session != session)
1452                         return __connman_error_failed(msg, EBUSY);
1453
1454                 session->ecall = TRUE;
1455                 session_changed(session, CONNMAN_SESSION_TRIGGER_ECALL);
1456         } else
1457                 session_changed(session, CONNMAN_SESSION_TRIGGER_CONNECT);
1458
1459         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1460 }
1461
1462 static DBusMessage *disconnect_session(DBusConnection *conn,
1463                                         DBusMessage *msg, void *user_data)
1464 {
1465         struct connman_session *session = user_data;
1466
1467         DBG("session %p", session);
1468
1469         if (ecall_session != NULL) {
1470                 if (ecall_session->ecall == TRUE && ecall_session != session)
1471                         return __connman_error_failed(msg, EBUSY);
1472
1473                 session->ecall = FALSE;
1474         }
1475
1476         session_changed(session, CONNMAN_SESSION_TRIGGER_DISCONNECT);
1477
1478         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1479 }
1480
1481 static DBusMessage *change_session(DBusConnection *conn,
1482                                         DBusMessage *msg, void *user_data)
1483 {
1484         struct connman_session *session = user_data;
1485         struct session_info *info = session->info;
1486         DBusMessageIter iter, value;
1487         const char *name;
1488         const char *val;
1489         GSList *allowed_bearers;
1490         int err;
1491
1492         DBG("session %p", session);
1493         if (dbus_message_iter_init(msg, &iter) == FALSE)
1494                 return __connman_error_invalid_arguments(msg);
1495
1496         if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
1497                 return __connman_error_invalid_arguments(msg);
1498
1499         dbus_message_iter_get_basic(&iter, &name);
1500         dbus_message_iter_next(&iter);
1501
1502         if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1503                 return __connman_error_invalid_arguments(msg);
1504
1505         dbus_message_iter_recurse(&iter, &value);
1506
1507         switch (dbus_message_iter_get_arg_type(&value)) {
1508         case DBUS_TYPE_ARRAY:
1509                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
1510                         err = parse_bearers(&value, &allowed_bearers);
1511                         if (err < 0)
1512                                 return __connman_error_failed(msg, err);
1513
1514                         g_slist_free(info->config.allowed_bearers);
1515                         session->user_allowed_bearers = allowed_bearers;
1516
1517                         err = apply_policy_on_bearers(
1518                                         session->policy_config->allowed_bearers,
1519                                         session->user_allowed_bearers,
1520                                         &info->config.allowed_bearers);
1521
1522                         if (err < 0)
1523                                 return __connman_error_failed(msg, err);
1524                 } else {
1525                         goto err;
1526                 }
1527                 break;
1528         case DBUS_TYPE_STRING:
1529                 if (g_str_equal(name, "ConnectionType") == TRUE) {
1530                         dbus_message_iter_get_basic(&value, &val);
1531                         info->config.type = apply_policy_on_type(
1532                                 session->policy_config->type,
1533                                 connman_session_parse_connection_type(val));
1534                 } else {
1535                         goto err;
1536                 }
1537                 break;
1538         default:
1539                 goto err;
1540         }
1541
1542         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1543
1544         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1545
1546 err:
1547         return __connman_error_invalid_arguments(msg);
1548 }
1549
1550 static void release_session(gpointer key, gpointer value, gpointer user_data)
1551 {
1552         struct connman_session *session = value;
1553         DBusMessage *message;
1554
1555         DBG("owner %s path %s", session->owner, session->notify_path);
1556
1557         if (session->notify_watch > 0)
1558                 g_dbus_remove_watch(connection, session->notify_watch);
1559
1560         g_dbus_unregister_interface(connection, session->session_path,
1561                                                 CONNMAN_SESSION_INTERFACE);
1562
1563         message = dbus_message_new_method_call(session->owner,
1564                                                 session->notify_path,
1565                                                 CONNMAN_NOTIFICATION_INTERFACE,
1566                                                 "Release");
1567         if (message == NULL)
1568                 return;
1569
1570         dbus_message_set_no_reply(message, TRUE);
1571
1572         g_dbus_send_message(connection, message);
1573 }
1574
1575 static int session_disconnect(struct connman_session *session)
1576 {
1577         DBG("session %p, %s", session, session->owner);
1578
1579         if (session->notify_watch > 0)
1580                 g_dbus_remove_watch(connection, session->notify_watch);
1581
1582         g_dbus_unregister_interface(connection, session->session_path,
1583                                                 CONNMAN_SESSION_INTERFACE);
1584
1585         deselect_and_disconnect(session);
1586
1587         g_hash_table_remove(session_hash, session->session_path);
1588
1589         return 0;
1590 }
1591
1592 static void owner_disconnect(DBusConnection *conn, void *user_data)
1593 {
1594         struct connman_session *session = user_data;
1595
1596         DBG("session %p, %s died", session, session->owner);
1597
1598         session_disconnect(session);
1599 }
1600
1601 static DBusMessage *destroy_session(DBusConnection *conn,
1602                                         DBusMessage *msg, void *user_data)
1603 {
1604         struct connman_session *session = user_data;
1605
1606         DBG("session %p", session);
1607
1608         if (ecall_session != NULL && ecall_session != session)
1609                 return __connman_error_failed(msg, EBUSY);
1610
1611         session_disconnect(session);
1612
1613         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1614 }
1615
1616 static const GDBusMethodTable session_methods[] = {
1617         { GDBUS_METHOD("Destroy", NULL, NULL, destroy_session) },
1618         { GDBUS_METHOD("Connect", NULL, NULL, connect_session) },
1619         { GDBUS_METHOD("Disconnect", NULL, NULL,
1620                         disconnect_session ) },
1621         { GDBUS_METHOD("Change",
1622                         GDBUS_ARGS({ "name", "s" }, { "value", "v" }),
1623                         NULL, change_session) },
1624         { },
1625 };
1626
1627 static int session_create_cb(struct connman_session *session,
1628                                 struct connman_session_config *config,
1629                                 void *user_data, int err)
1630 {
1631         DBusMessage *reply;
1632         struct user_config *user_config = user_data;
1633         struct session_info *info, *info_last;
1634
1635         DBG("session %p config %p", session, config);
1636
1637         if (err != 0)
1638                 goto out;
1639
1640         session->policy_config = config;
1641
1642         info = session->info;
1643         info_last = session->info_last;
1644
1645         if (session->policy_config->ecall == TRUE)
1646                 ecall_session = session;
1647
1648         info->state = CONNMAN_SESSION_STATE_DISCONNECTED;
1649         info->config.type = apply_policy_on_type(
1650                                 session->policy_config->type,
1651                                 user_config->type);
1652         info->config.priority = session->policy_config->priority;
1653         info->config.roaming_policy = session->policy_config->roaming_policy;
1654         info->entry = NULL;
1655
1656         session->user_allowed_bearers = user_config->allowed_bearers;
1657         user_config->allowed_bearers = NULL;
1658
1659         err = apply_policy_on_bearers(
1660                         session->policy_config->allowed_bearers,
1661                         session->user_allowed_bearers,
1662                         &info->config.allowed_bearers);
1663         if (err < 0)
1664                 goto out;
1665
1666         g_hash_table_replace(session_hash, session->session_path, session);
1667
1668         DBG("add %s", session->session_path);
1669
1670         if (g_dbus_register_interface(connection, session->session_path,
1671                                         CONNMAN_SESSION_INTERFACE,
1672                                         session_methods, NULL,
1673                                         NULL, session, NULL) == FALSE) {
1674                 connman_error("Failed to register %s", session->session_path);
1675                 g_hash_table_remove(session_hash, session->session_path);
1676                 err = -EINVAL;
1677                 goto out;
1678         }
1679
1680         reply = g_dbus_create_reply(user_config->pending,
1681                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1682                                 DBUS_TYPE_INVALID);
1683         g_dbus_send_message(connection, reply);
1684         user_config->pending = NULL;
1685
1686         populate_service_list(session);
1687
1688         info_last->state = info->state;
1689         info_last->config.priority = info->config.priority;
1690         info_last->config.roaming_policy = info->config.roaming_policy;
1691         info_last->entry = info->entry;
1692         info_last->config.allowed_bearers = info->config.allowed_bearers;
1693
1694         session->append_all = TRUE;
1695
1696         session_changed(session, CONNMAN_SESSION_TRIGGER_SETTING);
1697
1698 out:
1699         if (err < 0) {
1700                 reply = __connman_error_failed(user_config->pending, -err);
1701                 g_dbus_send_message(connection, reply);
1702
1703                 free_session(session);
1704         }
1705
1706         cleanup_user_config(user_config);
1707
1708         return err;
1709 }
1710
1711 int __connman_session_create(DBusMessage *msg)
1712 {
1713         const char *owner, *notify_path;
1714         char *session_path = NULL;
1715         DBusMessageIter iter, array;
1716         struct connman_session *session = NULL;
1717         struct user_config *user_config = NULL;
1718         connman_bool_t user_allowed_bearers = FALSE;
1719         connman_bool_t user_connection_type = FALSE;
1720         int err;
1721
1722         owner = dbus_message_get_sender(msg);
1723
1724         DBG("owner %s", owner);
1725
1726         if (ecall_session != NULL && ecall_session->ecall == TRUE) {
1727                 /*
1728                  * If there is an emergency call already going on,
1729                  * ignore session creation attempt
1730                  */
1731                 err = -EBUSY;
1732                 goto err;
1733         }
1734
1735         user_config = g_try_new0(struct user_config, 1);
1736         if (user_config == NULL) {
1737                 err = -ENOMEM;
1738                 goto err;
1739         }
1740
1741         user_config->pending = dbus_message_ref(msg);
1742
1743         dbus_message_iter_init(msg, &iter);
1744         dbus_message_iter_recurse(&iter, &array);
1745
1746         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1747                 DBusMessageIter entry, value;
1748                 const char *key, *val;
1749
1750                 dbus_message_iter_recurse(&array, &entry);
1751                 dbus_message_iter_get_basic(&entry, &key);
1752
1753                 dbus_message_iter_next(&entry);
1754                 dbus_message_iter_recurse(&entry, &value);
1755
1756                 switch (dbus_message_iter_get_arg_type(&value)) {
1757                 case DBUS_TYPE_ARRAY:
1758                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
1759                                 err = parse_bearers(&value,
1760                                                 &user_config->allowed_bearers);
1761                                 if (err < 0)
1762                                         goto err;
1763
1764                                 user_allowed_bearers = TRUE;
1765                         } else {
1766                                 err = -EINVAL;
1767                                 goto err;
1768                         }
1769                         break;
1770                 case DBUS_TYPE_STRING:
1771                         if (g_str_equal(key, "ConnectionType") == TRUE) {
1772                                 dbus_message_iter_get_basic(&value, &val);
1773                                 user_config->type =
1774                                         connman_session_parse_connection_type(val);
1775
1776                                 user_connection_type = TRUE;
1777                         } else {
1778                                 err = -EINVAL;
1779                                 goto err;
1780                         }
1781                 }
1782                 dbus_message_iter_next(&array);
1783         }
1784
1785         /*
1786          * If the user hasn't provided a configuration, we set
1787          * the default configuration.
1788          *
1789          * For AllowedBearers this is '*', ...
1790          */
1791         if (user_allowed_bearers == FALSE) {
1792                 user_config->allowed_bearers =
1793                         g_slist_append(NULL,
1794                                 GINT_TO_POINTER(CONNMAN_SERVICE_TYPE_UNKNOWN));
1795                 if (user_config->allowed_bearers == NULL) {
1796                         err = -ENOMEM;
1797                         goto err;
1798                 }
1799         }
1800
1801         /* ... and for ConnectionType it is 'any'. */
1802         if (user_connection_type == FALSE)
1803                 user_config->type = CONNMAN_SESSION_TYPE_ANY;
1804
1805         dbus_message_iter_next(&iter);
1806         dbus_message_iter_get_basic(&iter, &notify_path);
1807
1808         if (notify_path == NULL) {
1809                 err = -EINVAL;
1810                 goto err;
1811         }
1812
1813         session_path = g_strdup_printf("/sessions%s", notify_path);
1814         if (session_path == NULL) {
1815                 err = -ENOMEM;
1816                 goto err;
1817         }
1818
1819         session = g_hash_table_lookup(session_hash, session_path);
1820         if (session != NULL) {
1821                 g_free(session_path);
1822                 session = NULL;
1823                 err = -EEXIST;
1824                 goto err;
1825         }
1826
1827         session = g_try_new0(struct connman_session, 1);
1828         if (session == NULL) {
1829                 g_free(session_path);
1830                 err = -ENOMEM;
1831                 goto err;
1832         }
1833
1834         session->session_path = session_path;
1835
1836         session->info = g_try_new0(struct session_info, 1);
1837         if (session->info == NULL) {
1838                 err = -ENOMEM;
1839                 goto err;
1840         }
1841
1842         session->info_last = g_try_new0(struct session_info, 1);
1843         if (session->info_last == NULL) {
1844                 err = -ENOMEM;
1845                 goto err;
1846         }
1847
1848         session->owner = g_strdup(owner);
1849         session->notify_path = g_strdup(notify_path);
1850         session->notify_watch =
1851                 g_dbus_add_disconnect_watch(connection, session->owner,
1852                                         owner_disconnect, session, NULL);
1853
1854         err = assign_policy_plugin(session);
1855         if (err < 0)
1856                 goto err;
1857
1858         err = create_policy_config(session, session_create_cb, user_config);
1859         if (err < 0 && err != -EINPROGRESS)
1860                 return err;
1861
1862         return -EINPROGRESS;
1863
1864 err:
1865         connman_error("Failed to create session");
1866
1867         free_session(session);
1868
1869         cleanup_user_config(user_config);
1870         return err;
1871 }
1872
1873 void connman_session_destroy(struct connman_session *session)
1874 {
1875         DBG("session %p", session);
1876
1877         session_disconnect(session);
1878 }
1879
1880 int __connman_session_destroy(DBusMessage *msg)
1881 {
1882         const char *owner, *session_path;
1883         struct connman_session *session;
1884
1885         owner = dbus_message_get_sender(msg);
1886
1887         DBG("owner %s", owner);
1888
1889         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1890                                                         DBUS_TYPE_INVALID);
1891         if (session_path == NULL)
1892                 return -EINVAL;
1893
1894         session = g_hash_table_lookup(session_hash, session_path);
1895         if (session == NULL)
1896                 return -EINVAL;
1897
1898         if (g_strcmp0(owner, session->owner) != 0)
1899                 return -EACCES;
1900
1901         connman_session_destroy(session);
1902
1903         return 0;
1904 }
1905
1906 connman_bool_t __connman_session_mode()
1907 {
1908         return sessionmode;
1909 }
1910
1911 void __connman_session_set_mode(connman_bool_t enable)
1912 {
1913         DBG("enable %d", enable);
1914
1915         if (sessionmode != enable) {
1916                 sessionmode = enable;
1917
1918                 connman_dbus_property_changed_basic(CONNMAN_MANAGER_PATH,
1919                                 CONNMAN_MANAGER_INTERFACE, "SessionMode",
1920                                 DBUS_TYPE_BOOLEAN, &sessionmode);
1921         }
1922
1923         if (sessionmode == TRUE)
1924                 __connman_service_disconnect_all();
1925 }
1926
1927 static void service_add(struct connman_service *service,
1928                         const char *name)
1929 {
1930         GHashTableIter iter;
1931         GSequenceIter *iter_service_list;
1932         gpointer key, value;
1933         struct connman_session *session;
1934         struct service_entry *entry;
1935
1936         DBG("service %p", service);
1937
1938         g_hash_table_iter_init(&iter, session_hash);
1939
1940         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1941                 session = value;
1942
1943                 if (service_match(session, service) == FALSE)
1944                         continue;
1945
1946                 entry = create_service_entry(session, service, name,
1947                                                 CONNMAN_SERVICE_STATE_IDLE);
1948                 if (entry == NULL)
1949                         continue;
1950
1951                 iter_service_list =
1952                         g_sequence_insert_sorted(session->service_list,
1953                                                         entry, sort_services,
1954                                                         session);
1955
1956                 g_hash_table_replace(session->service_hash, service,
1957                                         iter_service_list);
1958
1959                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1960         }
1961 }
1962
1963 static void service_remove(struct connman_service *service)
1964 {
1965
1966         GHashTableIter iter;
1967         gpointer key, value;
1968         struct connman_session *session;
1969         struct session_info *info;
1970
1971         DBG("service %p", service);
1972
1973         g_hash_table_iter_init(&iter, session_hash);
1974
1975         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1976                 GSequenceIter *seq_iter;
1977                 session = value;
1978                 info = session->info;
1979
1980                 seq_iter = g_hash_table_lookup(session->service_hash, service);
1981                 if (seq_iter == NULL)
1982                         continue;
1983
1984                 g_sequence_remove(seq_iter);
1985
1986                 if (info->entry != NULL && info->entry->service == service)
1987                         info->entry = NULL;
1988                 session_changed(session, CONNMAN_SESSION_TRIGGER_SERVICE);
1989         }
1990 }
1991
1992 static void service_state_changed(struct connman_service *service,
1993                                         enum connman_service_state state)
1994 {
1995         GHashTableIter iter;
1996         gpointer key, value;
1997
1998         DBG("service %p state %d", service, state);
1999
2000         g_hash_table_iter_init(&iter, session_hash);
2001
2002         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
2003                 struct connman_session *session = value;
2004                 GSequenceIter *service_iter;
2005
2006                 service_iter = g_hash_table_lookup(session->service_hash, service);
2007                 if (service_iter != NULL) {
2008                         struct service_entry *entry;
2009
2010                         entry = g_sequence_get(service_iter);
2011                         entry->state = state;
2012                 }
2013
2014                 session_changed(session,
2015                                 CONNMAN_SESSION_TRIGGER_SERVICE);
2016         }
2017 }
2018
2019 static void ipconfig_changed(struct connman_service *service,
2020                                 struct connman_ipconfig *ipconfig)
2021 {
2022         GHashTableIter iter;
2023         gpointer key, value;
2024         struct connman_session *session;
2025         struct session_info *info;
2026         enum connman_ipconfig_type type;
2027
2028         DBG("service %p ipconfig %p", service, ipconfig);
2029
2030         type = __connman_ipconfig_get_config_type(ipconfig);
2031
2032         g_hash_table_iter_init(&iter, session_hash);
2033
2034         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
2035                 session = value;
2036                 info = session->info;
2037
2038                 if (info->state == CONNMAN_SESSION_STATE_DISCONNECTED)
2039                         continue;
2040
2041                 if (info->entry != NULL && info->entry->service == service) {
2042                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
2043                                 ipconfig_ipv4_changed(session);
2044                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
2045                                 ipconfig_ipv6_changed(session);
2046                 }
2047         }
2048 }
2049
2050 static struct connman_notifier session_notifier = {
2051         .name                   = "session",
2052         .service_add            = service_add,
2053         .service_remove         = service_remove,
2054         .service_state_changed  = service_state_changed,
2055         .ipconfig_changed       = ipconfig_changed,
2056 };
2057
2058 int __connman_session_init(void)
2059 {
2060         int err;
2061
2062         DBG("");
2063
2064         connection = connman_dbus_get_connection();
2065         if (connection == NULL)
2066                 return -1;
2067
2068         err = connman_notifier_register(&session_notifier);
2069         if (err < 0) {
2070                 dbus_connection_unref(connection);
2071                 return err;
2072         }
2073
2074         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
2075                                                 NULL, cleanup_session);
2076
2077         sessionmode = FALSE;
2078         return 0;
2079 }
2080
2081 void __connman_session_cleanup(void)
2082 {
2083         DBG("");
2084
2085         if (connection == NULL)
2086                 return;
2087
2088         connman_notifier_unregister(&session_notifier);
2089
2090         g_hash_table_foreach(session_hash, release_session, NULL);
2091         g_hash_table_destroy(session_hash);
2092         session_hash = NULL;
2093
2094         dbus_connection_unref(connection);
2095 }