src/session.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  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 <gdbus.h>
  28
  29 #include "connman.h"
  30
  31 static DBusConnection *connection;
  32 static GHashTable *session_hash;
  33 static connman_bool_t sessionmode;
  34 static struct connman_session *ecall_session;
  35
  36 enum connman_session_roaming_policy {
  37         CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN          = 0,
  38         CONNMAN_SESSION_ROAMING_POLICY_DEFAULT          = 1,
  39         CONNMAN_SESSION_ROAMING_POLICY_ALWAYS           = 2,
  40         CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN        = 3,
  41         CONNMAN_SESSION_ROAMING_POLICY_NATIONAL         = 4,
  42         CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL    = 5,
  43 };
  44
  45 struct session_info {
  46         char *bearer;
  47         const char *name;
  48         char *ifname;
  49         connman_bool_t connect;
  50         connman_bool_t online;
  51         connman_bool_t priority;
  52         GSList *allowed_bearers;
  53         connman_bool_t avoid_handover;
  54         connman_bool_t stay_connected;
  55         unsigned int periodic_connect;
  56         unsigned int idle_timeout;
  57         connman_bool_t ecall;
  58         enum connman_session_roaming_policy roaming_policy;
  59         unsigned int marker;
  60
  61         struct connman_service *service;
  62 };
  63
  64 struct connman_session {
  65         char *owner;
  66         char *session_path;
  67         char *notify_path;
  68         guint notify_watch;
  69
  70         connman_bool_t append_all;
  71         connman_bool_t info_dirty;
  72         struct session_info info;
  73         struct session_info info_last;
  74
  75         GSequence *service_list;
  76 };
  77
  78 struct bearer_info {
  79         char *name;
  80         connman_bool_t match_all;
  81         enum connman_service_type service_type;
  82 };
  83
  84 static const char *roamingpolicy2string(enum connman_session_roaming_policy policy)
  85 {
  86         switch (policy) {
  87         case CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN:
  88                 break;
  89         case CONNMAN_SESSION_ROAMING_POLICY_DEFAULT:
  90                 return "default";
  91         case CONNMAN_SESSION_ROAMING_POLICY_ALWAYS:
  92                 return "always";
  93         case CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN:
  94                 return "forbidden";
  95         case CONNMAN_SESSION_ROAMING_POLICY_NATIONAL:
  96                 return "national";
  97         case CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL:
  98                 return "international";
  99         }
 100
 101         return NULL;
 102 }
 103
 104 static enum connman_session_roaming_policy string2roamingpolicy(const char *policy)
 105 {
 106         if (g_strcmp0(policy, "default") == 0)
 107                 return CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 108         else if (g_strcmp0(policy, "always") == 0)
 109                 return CONNMAN_SESSION_ROAMING_POLICY_ALWAYS;
 110         else if (g_strcmp0(policy, "forbidden") == 0)
 111                 return CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
 112         else if (g_strcmp0(policy, "national") == 0)
 113                 return CONNMAN_SESSION_ROAMING_POLICY_NATIONAL;
 114         else if (g_strcmp0(policy, "international") == 0)
 115                 return CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL;
 116         else
 117                 return CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN;
 118 }
 119
 120 static enum connman_service_type bearer2service(const char *bearer)
 121 {
 122         if (bearer == NULL)
 123                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 124
 125         if (g_strcmp0(bearer, "ethernet") == 0)
 126                 return CONNMAN_SERVICE_TYPE_ETHERNET;
 127         else if (g_strcmp0(bearer, "wifi") == 0)
 128                 return CONNMAN_SERVICE_TYPE_WIFI;
 129         else if (g_strcmp0(bearer, "wimax") == 0)
 130                 return CONNMAN_SERVICE_TYPE_WIMAX;
 131         else if (g_strcmp0(bearer, "bluetooth") == 0)
 132                 return CONNMAN_SERVICE_TYPE_BLUETOOTH;
 133         else if (g_strcmp0(bearer, "3g") == 0)
 134                 return CONNMAN_SERVICE_TYPE_CELLULAR;
 135         else
 136                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 137 }
 138
 139 static char *service2bearer(enum connman_service_type type)
 140 {
 141         switch (type) {
 142         case CONNMAN_SERVICE_TYPE_ETHERNET:
 143                 return "ethernet";
 144         case CONNMAN_SERVICE_TYPE_WIFI:
 145                 return "wifi";
 146         case CONNMAN_SERVICE_TYPE_WIMAX:
 147                 return "wimax";
 148         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 149                 return "bluetooth";
 150         case CONNMAN_SERVICE_TYPE_CELLULAR:
 151                 return "3g";
 152         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 153         case CONNMAN_SERVICE_TYPE_SYSTEM:
 154         case CONNMAN_SERVICE_TYPE_GPS:
 155         case CONNMAN_SERVICE_TYPE_VPN:
 156         case CONNMAN_SERVICE_TYPE_GADGET:
 157                 return "";
 158         }
 159
 160         return "";
 161 }
 162
 163 static void cleanup_bearer_info(gpointer data, gpointer user_data)
 164 {
 165         struct bearer_info *info = data;
 166
 167         g_free(info->name);
 168         g_free(info);
 169 }
 170
 171 static GSList *session_parse_allowed_bearers(DBusMessageIter *iter)
 172 {
 173         struct bearer_info *info;
 174         DBusMessageIter array;
 175         GSList *list = NULL;
 176
 177         dbus_message_iter_recurse(iter, &array);
 178
 179         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_STRING) {
 180                 char *bearer = NULL;
 181
 182                 dbus_message_iter_get_basic(&array, &bearer);
 183
 184                 info = g_try_new0(struct bearer_info, 1);
 185                 if (info == NULL) {
 186                         g_slist_foreach(list, cleanup_bearer_info, NULL);
 187                         g_slist_free(list);
 188
 189                         return NULL;
 190                 }
 191
 192                 info->name = g_strdup(bearer);
 193                 info->service_type = bearer2service(info->name);
 194
 195                 if (info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN &&
 196                                 g_strcmp0(info->name, "*") == 0) {
 197                         info->match_all = TRUE;
 198                 } else {
 199                         info->match_all = FALSE;
 200                 }
 201
 202                 list = g_slist_append(list, info);
 203
 204                 dbus_message_iter_next(&array);
 205         }
 206
 207         return list;
 208 }
 209
 210 static GSList *session_allowed_bearers_any(void)
 211 {
 212         struct bearer_info *info;
 213         GSList *list = NULL;
 214
 215         info = g_try_new0(struct bearer_info, 1);
 216         if (info == NULL) {
 217                 g_slist_free(list);
 218
 219                 return NULL;
 220         }
 221
 222         info->name = g_strdup("");
 223         info->match_all = TRUE;
 224         info->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 225
 226         list = g_slist_append(list, info);
 227
 228         return list;
 229 }
 230
 231 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 232 {
 233         struct session_info *info = user_data;
 234         GSList *list;
 235
 236         for (list = info->allowed_bearers;
 237                         list != NULL; list = list->next) {
 238                 struct bearer_info *info = list->data;
 239
 240                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 241                                                 &info->name);
 242         }
 243 }
 244
 245 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 246 {
 247         struct connman_service *service = user_data;
 248         struct connman_ipconfig *ipconfig_ipv4;
 249
 250         if (service == NULL)
 251                 return;
 252
 253         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 254         if (ipconfig_ipv4 == NULL)
 255                 return;
 256
 257         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 258 }
 259
 260 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 261 {
 262         struct connman_service *service = user_data;
 263         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 264
 265         if (service == NULL)
 266                 return;
 267
 268         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 269         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 270         if (ipconfig_ipv6 == NULL)
 271                 return;
 272
 273         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 274 }
 275
 276 static void append_notify(DBusMessageIter *dict,
 277                                         struct connman_session *session)
 278 {
 279         struct session_info *info = &session->info;
 280         struct session_info *info_last = &session->info_last;
 281         const char *policy;
 282
 283         if (session->append_all == TRUE ||
 284                         info->bearer != info_last->bearer) {
 285                 connman_dbus_dict_append_basic(dict, "Bearer",
 286                                                 DBUS_TYPE_STRING,
 287                                                 &info->bearer);
 288                 info_last->bearer = info->bearer;
 289         }
 290
 291         if (session->append_all == TRUE ||
 292                         info->online != info_last->online) {
 293                 connman_dbus_dict_append_basic(dict, "Online",
 294                                                 DBUS_TYPE_BOOLEAN,
 295                                                 &info->online);
 296                 info_last->online = info->online;
 297         }
 298
 299         if (session->append_all == TRUE ||
 300                         info->name != info_last->name) {
 301                 connman_dbus_dict_append_basic(dict, "Name",
 302                                                 DBUS_TYPE_STRING,
 303                                                 &info->name);
 304                 info_last->name = info->name;
 305         }
 306
 307         if (session->append_all == TRUE ||
 308                         info->service != info_last->service) {
 309                 connman_dbus_dict_append_dict(dict, "IPv4",
 310                                                 append_ipconfig_ipv4,
 311                                                 info->service);
 312
 313                 connman_dbus_dict_append_dict(dict, "IPv6",
 314                                                 append_ipconfig_ipv6,
 315                                                 info->service);
 316
 317                 connman_dbus_dict_append_basic(dict, "Interface",
 318                                                 DBUS_TYPE_STRING,
 319                                                 &info->ifname);
 320
 321                 info_last->ifname = info->ifname;
 322                 info_last->service = info->service;
 323         }
 324
 325
 326         if (session->append_all == TRUE ||
 327                         info->priority != info_last->priority) {
 328                 connman_dbus_dict_append_basic(dict, "Priority",
 329                                                 DBUS_TYPE_BOOLEAN,
 330                                                 &info->priority);
 331                 info_last->priority = info->priority;
 332         }
 333
 334         if (session->append_all == TRUE ||
 335                         info->allowed_bearers != info_last->allowed_bearers) {
 336                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 337                                                 DBUS_TYPE_STRING,
 338                                                 append_allowed_bearers,
 339                                                 info);
 340                 info_last->allowed_bearers = info->allowed_bearers;
 341         }
 342
 343         if (session->append_all == TRUE ||
 344                         info->avoid_handover != info_last->avoid_handover) {
 345                 connman_dbus_dict_append_basic(dict, "AvoidHandover",
 346                                                 DBUS_TYPE_BOOLEAN,
 347                                                 &info->avoid_handover);
 348                 info_last->avoid_handover = info->avoid_handover;
 349         }
 350
 351         if (session->append_all == TRUE ||
 352                         info->stay_connected != info_last->stay_connected) {
 353                 connman_dbus_dict_append_basic(dict, "StayConnected",
 354                                                 DBUS_TYPE_BOOLEAN,
 355                                                 &info->stay_connected);
 356                 info_last->stay_connected = info->stay_connected;
 357         }
 358
 359         if (session->append_all == TRUE ||
 360                         info->periodic_connect != info_last->periodic_connect) {
 361                 connman_dbus_dict_append_basic(dict, "PeriodicConnect",
 362                                                 DBUS_TYPE_UINT32,
 363                                                 &info->periodic_connect);
 364                 info_last->periodic_connect = info->periodic_connect;
 365         }
 366
 367         if (session->append_all == TRUE ||
 368                         info->idle_timeout != info_last->idle_timeout) {
 369                 connman_dbus_dict_append_basic(dict, "IdleTimeout",
 370                                                 DBUS_TYPE_UINT32,
 371                                                 &info->idle_timeout);
 372                 info_last->idle_timeout = info->idle_timeout;
 373         }
 374
 375         if (session->append_all == TRUE ||
 376                         info->ecall != info_last->ecall) {
 377                 connman_dbus_dict_append_basic(dict, "EmergencyCall",
 378                                                 DBUS_TYPE_BOOLEAN,
 379                                                 &info->ecall);
 380                 info_last->ecall = info->ecall;
 381         }
 382
 383         if (session->append_all == TRUE ||
 384                         info->roaming_policy != info_last->roaming_policy) {
 385                 policy = roamingpolicy2string(info->roaming_policy);
 386                 connman_dbus_dict_append_basic(dict, "RoamingPolicy",
 387                                                 DBUS_TYPE_STRING,
 388                                                 &policy);
 389                 info_last->roaming_policy = info->roaming_policy;
 390         }
 391
 392         if (session->append_all == TRUE ||
 393                         info->marker != info_last->marker) {
 394                 connman_dbus_dict_append_basic(dict, "SessionMarker",
 395                                                 DBUS_TYPE_UINT32,
 396                                                 &info->marker);
 397                 info_last->marker = info->marker;
 398         }
 399
 400         session->append_all = FALSE;
 401         session->info_dirty = FALSE;
 402 }
 403
 404 static int session_notify(struct connman_session *session)
 405 {
 406         DBusMessage *msg;
 407         DBusMessageIter array, dict;
 408
 409         if (session->info_dirty == FALSE)
 410                 return 0;
 411
 412         DBG("session %p owner %s notify_path %s", session,
 413                 session->owner, session->notify_path);
 414
 415         msg = dbus_message_new_method_call(session->owner, session->notify_path,
 416                                                 CONNMAN_NOTIFICATION_INTERFACE,
 417                                                 "Update");
 418         if (msg == NULL)
 419                 return -ENOMEM;
 420
 421         dbus_message_iter_init_append(msg, &array);
 422         connman_dbus_dict_open(&array, &dict);
 423
 424         append_notify(&dict, session);
 425
 426         connman_dbus_dict_close(&array, &dict);
 427
 428         g_dbus_send_message(connection, msg);
 429
 430         session->info_dirty = FALSE;
 431
 432         return 0;
 433 }
 434
 435 static void ipconfig_ipv4_changed(struct connman_session *session)
 436 {
 437         struct session_info *info = &session->info;
 438
 439         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 440                                                 "IPv4", append_ipconfig_ipv4,
 441                                                 info->service);
 442 }
 443
 444 static void ipconfig_ipv6_changed(struct connman_session *session)
 445 {
 446         struct session_info *info = &session->info;
 447
 448         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 449                                                 "IPv6", append_ipconfig_ipv6,
 450                                                 info->service);
 451 }
 452
 453 static GSequenceIter *lookup_service(struct connman_session *session,
 454                                         struct connman_service *service)
 455 {
 456         GSequenceIter *iter;
 457
 458         if (service == NULL)
 459                 return NULL;
 460
 461         iter = g_sequence_get_begin_iter(session->service_list);
 462
 463         while (g_sequence_iter_is_end(iter) == FALSE) {
 464                 struct connman_service *service_iter = g_sequence_get(iter);
 465
 466                 if (service_iter == service)
 467                         return iter;
 468
 469                 iter = g_sequence_iter_next(iter);
 470         }
 471
 472         return NULL;
 473 }
 474
 475 static connman_bool_t service_type_match(struct connman_session *session,
 476                                         struct connman_service *service)
 477 {
 478         struct session_info *info = &session->info;
 479         GSList *list;
 480
 481         for (list = info->allowed_bearers;
 482                         list != NULL; list = list->next) {
 483                 struct bearer_info *info = list->data;
 484                 enum connman_service_type service_type;
 485
 486                 if (info->match_all == TRUE)
 487                         return TRUE;
 488
 489                 service_type = connman_service_get_type(service);
 490                 if (info->service_type == service_type)
 491                         return TRUE;
 492         }
 493
 494         return FALSE;
 495 }
 496
 497 static connman_bool_t service_match(struct connman_session *session,
 498                                         struct connman_service *service)
 499 {
 500         if (service_type_match(session, service) == FALSE)
 501                 return FALSE;
 502
 503         return TRUE;
 504 }
 505
 506 static int service_type_weight(enum connman_service_type type)
 507 {
 508         /*
 509          * The session doesn't care which service
 510          * to use. Nevertheless we have to sort them
 511          * according their type. The ordering is
 512          *
 513          * 1. Ethernet
 514          * 2. Bluetooth
 515          * 3. WiFi/WiMAX
 516          * 4. GSM/UTMS/3G
 517          */
 518
 519         switch (type) {
 520         case CONNMAN_SERVICE_TYPE_ETHERNET:
 521                 return 4;
 522         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 523                 return 3;
 524         case CONNMAN_SERVICE_TYPE_WIFI:
 525         case CONNMAN_SERVICE_TYPE_WIMAX:
 526                 return 2;
 527         case CONNMAN_SERVICE_TYPE_CELLULAR:
 528                 return 1;
 529         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 530         case CONNMAN_SERVICE_TYPE_SYSTEM:
 531         case CONNMAN_SERVICE_TYPE_GPS:
 532         case CONNMAN_SERVICE_TYPE_VPN:
 533         case CONNMAN_SERVICE_TYPE_GADGET:
 534                 break;
 535         }
 536
 537         return 0;
 538 }
 539
 540 static gint sort_allowed_bearers(struct connman_service *service_a,
 541                                         struct connman_service *service_b,
 542                                         struct connman_session *session)
 543 {
 544         struct session_info *info = &session->info;
 545         GSList *list;
 546         enum connman_service_type type_a, type_b;
 547         int weight_a, weight_b;
 548
 549         type_a = connman_service_get_type(service_a);
 550         type_b = connman_service_get_type(service_b);
 551
 552         for (list = info->allowed_bearers;
 553                         list != NULL; list = list->next) {
 554                 struct bearer_info *info = list->data;
 555
 556                 if (info->match_all == TRUE) {
 557                         if (type_a != type_b) {
 558                                 weight_a = service_type_weight(type_a);
 559                                 weight_b = service_type_weight(type_b);
 560
 561                                 if (weight_a > weight_b)
 562                                         return -1;
 563
 564                                 if (weight_a < weight_b)
 565                                         return 1;
 566
 567                                 return 0;
 568                         }
 569                 }
 570
 571                 if (type_a == info->service_type &&
 572                                 type_b == info->service_type) {
 573                         return 0;
 574                 }
 575
 576                 if (type_a == info->service_type &&
 577                                 type_b != info->service_type) {
 578                         return -1;
 579                 }
 580
 581                 if (type_a != info->service_type &&
 582                                 type_b == info->service_type) {
 583                         return 1;
 584                 }
 585         }
 586
 587         return 0;
 588 }
 589
 590 static gint sort_services(gconstpointer a, gconstpointer b, gpointer user_data)
 591 {
 592         struct connman_service *service_a = (void *)a;
 593         struct connman_service *service_b = (void *)b;
 594         struct connman_session *session = user_data;
 595
 596         return sort_allowed_bearers(service_a, service_b, session);
 597 }
 598
 599 static void cleanup_session(gpointer user_data)
 600 {
 601         struct connman_session *session = user_data;
 602         struct session_info *info = &session->info;
 603
 604         DBG("remove %s", session->session_path);
 605
 606         g_sequence_free(session->service_list);
 607
 608         g_slist_foreach(info->allowed_bearers, cleanup_bearer_info, NULL);
 609         g_slist_free(info->allowed_bearers);
 610
 611         g_free(session->owner);
 612         g_free(session->session_path);
 613         g_free(session->notify_path);
 614
 615         g_free(session);
 616 }
 617
 618 static void release_session(gpointer key, gpointer value, gpointer user_data)
 619 {
 620         struct connman_session *session = value;
 621         DBusMessage *message;
 622
 623         DBG("owner %s path %s", session->owner, session->notify_path);
 624
 625         if (session->notify_watch > 0)
 626                 g_dbus_remove_watch(connection, session->notify_watch);
 627
 628         g_dbus_unregister_interface(connection, session->session_path,
 629                                                 CONNMAN_SESSION_INTERFACE);
 630
 631         message = dbus_message_new_method_call(session->owner,
 632                                                 session->notify_path,
 633                                                 CONNMAN_NOTIFICATION_INTERFACE,
 634                                                 "Release");
 635         if (message == NULL)
 636                 return;
 637
 638         dbus_message_set_no_reply(message, TRUE);
 639
 640         g_dbus_send_message(connection, message);
 641 }
 642
 643 static int session_disconnect(struct connman_session *session)
 644 {
 645         DBG("session %p, %s", session, session->owner);
 646
 647         if (session->notify_watch > 0)
 648                 g_dbus_remove_watch(connection, session->notify_watch);
 649
 650         g_dbus_unregister_interface(connection, session->session_path,
 651                                                 CONNMAN_SESSION_INTERFACE);
 652
 653         g_hash_table_remove(session_hash, session->session_path);
 654
 655         return 0;
 656 }
 657
 658 static void owner_disconnect(DBusConnection *conn, void *user_data)
 659 {
 660         struct connman_session *session = user_data;
 661
 662         DBG("session %p, %s died", session, session->owner);
 663
 664         session_disconnect(session);
 665 }
 666
 667 static DBusMessage *destroy_session(DBusConnection *conn,
 668                                         DBusMessage *msg, void *user_data)
 669 {
 670         struct connman_session *session = user_data;
 671
 672         DBG("session %p", session);
 673
 674         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 675 }
 676
 677 static gboolean session_changed_connect(gpointer user_data)
 678 {
 679         struct connman_session *session = user_data;
 680         struct session_info *info = &session->info;
 681
 682         __connman_service_connect(info->service);
 683
 684         return FALSE;
 685 }
 686
 687 static void update_info(struct session_info *info)
 688 {
 689         enum connman_service_type type;
 690         int idx;
 691
 692         if (info->service != NULL) {
 693                 type = connman_service_get_type(info->service);
 694                 info->bearer = service2bearer(type);
 695
 696                 info->online = __connman_service_is_connected(info->service);
 697                 info->name = __connman_service_get_name(info->service);
 698
 699                 idx = __connman_service_get_index(info->service);
 700                 info->ifname = connman_inet_ifname(idx);
 701                 if (info->ifname == NULL)
 702                         info->ifname = "";
 703         } else {
 704                 info->bearer = "";
 705                 info->online = FALSE;
 706                 info->name = "";
 707                 info->ifname = "";
 708         }
 709 }
 710
 711 static void session_changed(struct connman_session *session)
 712 {
 713         struct session_info *info = &session->info;
 714         struct session_info *info_last = &session->info_last;
 715         struct connman_service *service = NULL;
 716         GSourceFunc callback = NULL;
 717         GSequenceIter *iter;
 718
 719         /*
 720          * TODO: This only a placeholder for the 'real' algorithm to
 721          * play a bit around. So we are going to improve it step by step.
 722          */
 723
 724         if (info->ecall == TRUE && session != ecall_session)
 725                 goto out;
 726
 727         if (info->connect == FALSE) {
 728                 if (info->service != NULL)
 729                         __connman_service_disconnect(info->service);
 730                 info->service = NULL;
 731                 goto out;
 732         }
 733
 734         iter = g_sequence_get_begin_iter(session->service_list);
 735
 736         while (g_sequence_iter_is_end(iter) == FALSE) {
 737                 service = g_sequence_get(iter);
 738
 739                 if (__connman_service_is_connecting(service) == TRUE ||
 740                                 __connman_service_is_connected(service) == TRUE) {
 741                         break;
 742                 }
 743
 744                 if (__connman_service_is_idle(service) == TRUE &&
 745                                 info->connect == TRUE) {
 746                         callback = session_changed_connect;
 747                         break;
 748                 }
 749
 750                 service = NULL;
 751
 752                 iter = g_sequence_iter_next(iter);
 753         }
 754
 755         if (info->service != NULL && info->service != service) {
 756                 __connman_service_disconnect(info->service);
 757                 info->service = NULL;
 758         }
 759
 760         if (service != NULL) {
 761                 info->service = service;
 762
 763                 if (callback != NULL)
 764                         callback(session);
 765         }
 766
 767 out:
 768         if (info->service != info_last->service) {
 769                 update_info(info);
 770                 session->info_dirty = TRUE;
 771         }
 772 }
 773
 774 static gboolean session_cb(gpointer user_data)
 775 {
 776         struct connman_session *session = user_data;
 777
 778         session_changed(session);
 779         session_notify(session);
 780
 781         return FALSE;
 782 }
 783
 784 static DBusMessage *connect_session(DBusConnection *conn,
 785                                         DBusMessage *msg, void *user_data)
 786 {
 787         struct connman_session *session = user_data;
 788         struct session_info *info = &session->info;
 789
 790         DBG("session %p", session);
 791
 792         info->connect = TRUE;
 793
 794         if (ecall_session != NULL && ecall_session != session)
 795                 return __connman_error_failed(msg, EBUSY);
 796
 797         session->info_dirty = TRUE;
 798
 799         g_timeout_add_seconds(0, session_cb, session);
 800
 801         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 802 }
 803
 804 static DBusMessage *disconnect_session(DBusConnection *conn,
 805                                         DBusMessage *msg, void *user_data)
 806 {
 807         struct connman_session *session = user_data;
 808         struct session_info *info = &session->info;
 809
 810         DBG("session %p", session);
 811
 812         info->connect = FALSE;
 813
 814         if (ecall_session != NULL && ecall_session != session)
 815                 return __connman_error_failed(msg, EBUSY);
 816
 817         session->info_dirty = TRUE;
 818
 819         g_timeout_add_seconds(0, session_cb, session);
 820
 821         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 822 }
 823
 824 static void print_name(gpointer data, gpointer user_data)
 825 {
 826         struct connman_service *service = data;
 827
 828         DBG("service %p type %s name %s", service,
 829                 service2bearer(connman_service_get_type(service)),
 830                 __connman_service_get_name(service));
 831 }
 832
 833 static void update_allowed_bearers(struct connman_session *session)
 834 {
 835         if (session->service_list != NULL)
 836                 g_sequence_free(session->service_list);
 837
 838         session->service_list = __connman_service_get_list(session,
 839                                                                 service_match);
 840         g_sequence_sort(session->service_list, sort_services, session);
 841         g_sequence_foreach(session->service_list, print_name, NULL);
 842
 843         session->info_dirty = TRUE;
 844 }
 845
 846 static void update_ecall_sessions(struct connman_session *session)
 847 {
 848         struct session_info *info = &session->info;
 849         struct connman_session *session_iter;
 850         GHashTableIter iter;
 851         gpointer key, value;
 852
 853         g_hash_table_iter_init(&iter, session_hash);
 854
 855         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 856                 session_iter = value;
 857
 858                 if (session_iter == session)
 859                         continue;
 860
 861                 session_iter->info.ecall = info->ecall;
 862                 session_iter->info_dirty = TRUE;
 863
 864                 g_timeout_add_seconds(0, session_cb, session_iter);
 865         }
 866 }
 867
 868 static void update_ecall(struct connman_session *session)
 869 {
 870         struct session_info *info = &session->info;
 871         struct session_info *info_last = &session->info_last;
 872
 873         DBG("ecall_session %p ecall %d -> %d", ecall_session,
 874                 info_last->ecall, info->ecall);
 875
 876         if (ecall_session == NULL) {
 877                 if (!(info_last->ecall == FALSE && info->ecall == TRUE))
 878                         goto err;
 879
 880                 ecall_session = session;
 881         } else if (ecall_session == session) {
 882                 if (!(info_last->ecall == TRUE && info->ecall == FALSE))
 883                         goto err;
 884
 885                 ecall_session = NULL;
 886         } else {
 887                 goto err;
 888         }
 889
 890         update_ecall_sessions(session);
 891
 892         session->info_dirty = TRUE;
 893         return;
 894
 895 err:
 896         /* not a valid transition */
 897         info->ecall = info_last->ecall;
 898 }
 899
 900 static DBusMessage *change_session(DBusConnection *conn,
 901                                         DBusMessage *msg, void *user_data)
 902 {
 903         struct connman_session *session = user_data;
 904         struct session_info *info = &session->info;
 905         struct session_info *info_last = &session->info_last;
 906         DBusMessageIter iter, value;
 907         const char *name;
 908         GSList *allowed_bearers;
 909
 910         DBG("session %p", session);
 911         if (dbus_message_iter_init(msg, &iter) == FALSE)
 912                 return __connman_error_invalid_arguments(msg);
 913
 914         dbus_message_iter_get_basic(&iter, &name);
 915         dbus_message_iter_next(&iter);
 916         dbus_message_iter_recurse(&iter, &value);
 917
 918         switch (dbus_message_iter_get_arg_type(&value)) {
 919         case DBUS_TYPE_ARRAY:
 920                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
 921                         allowed_bearers = session_parse_allowed_bearers(&value);
 922
 923                         g_slist_foreach(info->allowed_bearers,
 924                                         cleanup_bearer_info, NULL);
 925                         g_slist_free(info->allowed_bearers);
 926
 927                         if (allowed_bearers == NULL) {
 928                                 allowed_bearers = session_allowed_bearers_any();
 929
 930                                 if (allowed_bearers == NULL)
 931                                         return __connman_error_failed(msg, ENOMEM);
 932                         }
 933
 934                         info->allowed_bearers = allowed_bearers;
 935
 936                         update_allowed_bearers(session);
 937                 } else {
 938                         goto err;
 939                 }
 940                 break;
 941         case DBUS_TYPE_BOOLEAN:
 942                 if (g_str_equal(name, "Priority") == TRUE) {
 943                         dbus_message_iter_get_basic(&value,
 944                                         &info->priority);
 945
 946                         if (info_last->priority != info->priority)
 947                                 session->info_dirty = TRUE;
 948                 } else if (g_str_equal(name, "AvoidHandover") == TRUE) {
 949                         dbus_message_iter_get_basic(&value,
 950                                         &info->avoid_handover);
 951
 952                         if (info_last->avoid_handover != info->avoid_handover)
 953                                 session->info_dirty = TRUE;
 954                         } else if (g_str_equal(name, "StayConnected") == TRUE) {
 955                         dbus_message_iter_get_basic(&value,
 956                                         &info->stay_connected);
 957
 958                         if (info_last->stay_connected != info->stay_connected)
 959                                 session->info_dirty = TRUE;
 960                 } else if (g_str_equal(name, "EmergencyCall") == TRUE) {
 961                         dbus_message_iter_get_basic(&value,
 962                                         &info->ecall);
 963
 964                         update_ecall(session);
 965                 } else {
 966                         goto err;
 967                 }
 968                 break;
 969         case DBUS_TYPE_UINT32:
 970                 if (g_str_equal(name, "PeriodicConnect") == TRUE) {
 971                         dbus_message_iter_get_basic(&value,
 972                                         &info->periodic_connect);
 973
 974                         if (info_last->periodic_connect != info->periodic_connect)
 975                                 session->info_dirty = TRUE;
 976                 } else if (g_str_equal(name, "IdleTimeout") == TRUE) {
 977                         dbus_message_iter_get_basic(&value,
 978                                         &info->idle_timeout);
 979
 980                         if (info_last->idle_timeout != info->idle_timeout)
 981                                 session->info_dirty = TRUE;
 982                 } else {
 983                         goto err;
 984                 }
 985                 break;
 986         case DBUS_TYPE_STRING:
 987                 if (g_str_equal(name, "RoamingPolicy") == TRUE) {
 988                         const char *val;
 989                         dbus_message_iter_get_basic(&value, &val);
 990                         info->roaming_policy =
 991                                         string2roamingpolicy(val);
 992
 993                         if (info_last->roaming_policy != info->roaming_policy)
 994                                 session->info_dirty = TRUE;
 995                 } else {
 996                         goto err;
 997                 }
 998                 break;
 999         default:
1000                 goto err;
1001         }
1002
1003         if (session->info_dirty == TRUE)
1004                 session_cb(session);
1005
1006         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1007
1008 err:
1009         return __connman_error_invalid_arguments(msg);
1010 }
1011
1012 static GDBusMethodTable session_methods[] = {
1013         { "Destroy",    "",   "", destroy_session    },
1014         { "Connect",    "",   "", connect_session    },
1015         { "Disconnect", "",   "", disconnect_session },
1016         { "Change",     "sv", "", change_session     },
1017         { },
1018 };
1019
1020 int __connman_session_create(DBusMessage *msg)
1021 {
1022         const char *owner, *notify_path;
1023         char *session_path = NULL;
1024         DBusMessageIter iter, array;
1025         struct connman_session *session;
1026         struct session_info *info, *info_last;
1027
1028         connman_bool_t priority = FALSE, avoid_handover = FALSE;
1029         connman_bool_t stay_connected = FALSE, ecall = FALSE;
1030         enum connman_session_roaming_policy roaming_policy =
1031                                 CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
1032         GSList *allowed_bearers = NULL;
1033         unsigned int periodic_connect = 0;
1034         unsigned int idle_timeout = 0;
1035
1036         int err;
1037
1038         owner = dbus_message_get_sender(msg);
1039
1040         DBG("owner %s", owner);
1041
1042         if (ecall_session != NULL) {
1043                 /*
1044                  * If there is an emergency call already going on,
1045                  * ignore session creation attempt
1046                  */
1047                 err = -EBUSY;
1048                 goto err;
1049         }
1050
1051         dbus_message_iter_init(msg, &iter);
1052         dbus_message_iter_recurse(&iter, &array);
1053
1054         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1055                 DBusMessageIter entry, value;
1056                 const char *key, *val;
1057
1058                 dbus_message_iter_recurse(&array, &entry);
1059                 dbus_message_iter_get_basic(&entry, &key);
1060
1061                 dbus_message_iter_next(&entry);
1062                 dbus_message_iter_recurse(&entry, &value);
1063
1064                 switch (dbus_message_iter_get_arg_type(&value)) {
1065                 case DBUS_TYPE_ARRAY:
1066                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
1067                                 allowed_bearers =
1068                                         session_parse_allowed_bearers(&value);
1069                         } else {
1070                                 return -EINVAL;
1071                         }
1072                         break;
1073                 case DBUS_TYPE_BOOLEAN:
1074                         if (g_str_equal(key, "Priority") == TRUE) {
1075                                 dbus_message_iter_get_basic(&value,
1076                                                         &priority);
1077                         } else if (g_str_equal(key, "AvoidHandover") == TRUE) {
1078                                 dbus_message_iter_get_basic(&value,
1079                                                         &avoid_handover);
1080                         } else if (g_str_equal(key, "StayConnected") == TRUE) {
1081                                 dbus_message_iter_get_basic(&value,
1082                                                         &stay_connected);
1083                         } else if (g_str_equal(key, "EmergencyCall") == TRUE) {
1084                                 dbus_message_iter_get_basic(&value,
1085                                                         &ecall);
1086                         } else {
1087                                 return -EINVAL;
1088                         }
1089                         break;
1090                 case DBUS_TYPE_UINT32:
1091                         if (g_str_equal(key, "PeriodicConnect") == TRUE) {
1092                                 dbus_message_iter_get_basic(&value,
1093                                                         &periodic_connect);
1094                         } else if (g_str_equal(key, "IdleTimeout") == TRUE) {
1095                                 dbus_message_iter_get_basic(&value,
1096                                                         &idle_timeout);
1097                         } else {
1098                                 return -EINVAL;
1099                         }
1100                         break;
1101                 case DBUS_TYPE_STRING:
1102                         if (g_str_equal(key, "RoamingPolicy") == TRUE) {
1103                                 dbus_message_iter_get_basic(&value, &val);
1104                                 roaming_policy = string2roamingpolicy(val);
1105                         } else {
1106                                 return -EINVAL;
1107                         }
1108                 }
1109                 dbus_message_iter_next(&array);
1110         }
1111
1112         dbus_message_iter_next(&iter);
1113         dbus_message_iter_get_basic(&iter, &notify_path);
1114
1115         if (notify_path == NULL) {
1116                 err = -EINVAL;
1117                 goto err;
1118         }
1119
1120         session_path = g_strdup_printf("/sessions%s", notify_path);
1121         if (session_path == NULL) {
1122                 err = -ENOMEM;
1123                 goto err;
1124         }
1125
1126         session = g_hash_table_lookup(session_hash, session_path);
1127         if (session != NULL) {
1128                 err = -EEXIST;
1129                 goto err;
1130         }
1131
1132         session = g_try_new0(struct connman_session, 1);
1133         if (session == NULL) {
1134                 err = -ENOMEM;
1135                 goto err;
1136         }
1137
1138         info = &session->info;
1139         info_last = &session->info_last;
1140
1141         session->owner = g_strdup(owner);
1142         session->session_path = session_path;
1143         session->notify_path = g_strdup(notify_path);
1144         session->notify_watch =
1145                 g_dbus_add_disconnect_watch(connection, session->owner,
1146                                         owner_disconnect, session, NULL);
1147
1148         info->bearer = "";
1149         info->online = FALSE;
1150         info->priority = priority;
1151         info->avoid_handover = avoid_handover;
1152         info->stay_connected = stay_connected;
1153         info->periodic_connect = periodic_connect;
1154         info->idle_timeout = idle_timeout;
1155         info->ecall = ecall;
1156         info->roaming_policy = roaming_policy;
1157         info->service = NULL;
1158         info->marker = 0;
1159
1160         if (allowed_bearers == NULL) {
1161                 info->allowed_bearers =
1162                                 session_allowed_bearers_any();
1163
1164                 if (info->allowed_bearers == NULL) {
1165                         err = -ENOMEM;
1166                         goto err;
1167                 }
1168         } else {
1169                 info->allowed_bearers = allowed_bearers;
1170         }
1171
1172         g_hash_table_replace(session_hash, session->session_path, session);
1173
1174         DBG("add %s", session->session_path);
1175
1176         if (g_dbus_register_interface(connection, session->session_path,
1177                                         CONNMAN_SESSION_INTERFACE,
1178                                         session_methods, NULL,
1179                                         NULL, session, NULL) == FALSE) {
1180                 connman_error("Failed to register %s", session->session_path);
1181                 g_hash_table_remove(session_hash, session->session_path);
1182                 session = NULL;
1183
1184                 err = -EINVAL;
1185                 goto err;
1186         }
1187
1188         g_dbus_send_reply(connection, msg,
1189                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1190                                 DBUS_TYPE_INVALID);
1191
1192
1193         update_allowed_bearers(session);
1194         update_info(info);
1195         if (info->ecall == TRUE) {
1196                 ecall_session = session;
1197                 update_ecall_sessions(session);
1198         }
1199
1200         info_last->bearer = info->bearer;
1201         info_last->online = info->online;
1202         info_last->priority = info->priority;
1203         info_last->avoid_handover = info->avoid_handover;
1204         info_last->stay_connected = info->stay_connected;
1205         info_last->periodic_connect = info->periodic_connect;
1206         info_last->idle_timeout = info->idle_timeout;
1207         info_last->ecall = info->ecall;
1208         info_last->roaming_policy = info->roaming_policy;
1209         info_last->service = info->service;
1210         info_last->marker = info->marker;
1211         info_last->allowed_bearers = info->allowed_bearers;
1212         update_info(info_last);
1213
1214         session->info_dirty = TRUE;
1215         session->append_all = TRUE;
1216
1217         g_timeout_add_seconds(0, session_cb, session);
1218
1219         return 0;
1220
1221 err:
1222         connman_error("Failed to create session");
1223         g_free(session_path);
1224
1225         g_slist_foreach(allowed_bearers, cleanup_bearer_info, NULL);
1226         g_slist_free(allowed_bearers);
1227
1228         return err;
1229 }
1230
1231 int __connman_session_destroy(DBusMessage *msg)
1232 {
1233         const char *owner, *session_path;
1234         struct connman_session *session;
1235
1236         owner = dbus_message_get_sender(msg);
1237
1238         DBG("owner %s", owner);
1239
1240         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1241                                                         DBUS_TYPE_INVALID);
1242         if (session_path == NULL)
1243                 return -EINVAL;
1244
1245         session = g_hash_table_lookup(session_hash, session_path);
1246         if (session == NULL)
1247                 return -EINVAL;
1248
1249         if (g_strcmp0(owner, session->owner) != 0)
1250                 return -EACCES;
1251
1252         session_disconnect(session);
1253
1254         return 0;
1255 }
1256
1257 connman_bool_t __connman_session_mode()
1258 {
1259         return sessionmode;
1260 }
1261
1262 void __connman_session_set_mode(connman_bool_t enable)
1263 {
1264         DBG("enable %d", enable);
1265
1266         if (sessionmode == enable)
1267                 return;
1268
1269         sessionmode = enable;
1270
1271         if (sessionmode == TRUE)
1272                 __connman_service_disconnect_all();
1273 }
1274
1275 static void service_add(struct connman_service *service)
1276 {
1277         GHashTableIter iter;
1278         gpointer key, value;
1279         struct connman_session *session;
1280
1281         DBG("service %p", service);
1282
1283         g_hash_table_iter_init(&iter, session_hash);
1284
1285         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1286                 session = value;
1287
1288                 if (service_match(session, service) == FALSE)
1289                         continue;
1290
1291                 g_sequence_insert_sorted(session->service_list, service,
1292                                                 sort_services, session);
1293
1294                 session_cb(session);
1295         }
1296 }
1297
1298 static int service_remove_from_session(struct connman_session *session,
1299                                         struct connman_service *service)
1300 {
1301
1302         GSequenceIter *iter;
1303
1304         iter = lookup_service(session, service);
1305         if (iter == NULL)
1306                 return -ENOENT;
1307
1308         session->info.online = FALSE;
1309         g_sequence_remove(iter);
1310
1311         return 0;
1312 }
1313
1314 static void service_remove(struct connman_service *service)
1315 {
1316
1317         GHashTableIter iter;
1318         gpointer key, value;
1319         struct connman_session *session;
1320         struct session_info *info;
1321
1322         DBG("service %p", service);
1323
1324         g_hash_table_iter_init(&iter, session_hash);
1325
1326         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1327                 session = value;
1328                 info = &session->info;
1329
1330                 if (service_remove_from_session(session, service) != 0)
1331                         continue;
1332
1333                 info->service = NULL;
1334                 session_cb(session);
1335         }
1336 }
1337
1338 static void service_state_changed(struct connman_service *service,
1339                                         enum connman_service_state state)
1340 {
1341         GHashTableIter iter;
1342         gpointer key, value;
1343         struct connman_session *session;
1344         struct session_info *info;
1345         connman_bool_t online;
1346
1347         DBG("service %p state %d", service, state);
1348
1349         g_hash_table_iter_init(&iter, session_hash);
1350
1351         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1352                 session = value;
1353                 info = &session->info;
1354
1355                 if (info->service == service) {
1356                         online = __connman_service_is_connected(service);
1357                         if (info->online == online)
1358                                 continue;
1359
1360                         info->online = online;
1361                         session->info_dirty = TRUE;
1362                         session_cb(session);
1363                 }
1364         }
1365 }
1366
1367 static void ipconfig_changed(struct connman_service *service,
1368                                 struct connman_ipconfig *ipconfig)
1369 {
1370         GHashTableIter iter;
1371         gpointer key, value;
1372         struct connman_session *session;
1373         struct session_info *info;
1374         enum connman_ipconfig_type type;
1375
1376         DBG("service %p ipconfig %p", service, ipconfig);
1377
1378         type = __connman_ipconfig_get_config_type(ipconfig);
1379
1380         g_hash_table_iter_init(&iter, session_hash);
1381
1382         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1383                 session = value;
1384                 info = &session->info;
1385
1386                 if (info->service == service) {
1387                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
1388                                 ipconfig_ipv4_changed(session);
1389                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
1390                                 ipconfig_ipv6_changed(session);
1391                 }
1392         }
1393 }
1394
1395 static struct connman_notifier session_notifier = {
1396         .name                   = "session",
1397         .service_add            = service_add,
1398         .service_remove         = service_remove,
1399         .service_state_changed  = service_state_changed,
1400         .ipconfig_changed       = ipconfig_changed,
1401 };
1402
1403 int __connman_session_init(void)
1404 {
1405         int err;
1406
1407         DBG("");
1408
1409         connection = connman_dbus_get_connection();
1410         if (connection == NULL)
1411                 return -1;
1412
1413         err = connman_notifier_register(&session_notifier);
1414         if (err < 0) {
1415                 dbus_connection_unref(connection);
1416                 return err;
1417         }
1418
1419         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
1420                                                 NULL, cleanup_session);
1421
1422         sessionmode = FALSE;
1423         return 0;
1424 }
1425
1426 void __connman_session_cleanup(void)
1427 {
1428         DBG("");
1429
1430         if (connection == NULL)
1431                 return;
1432
1433         connman_notifier_unregister(&session_notifier);
1434
1435         g_hash_table_foreach(session_hash, release_session, NULL);
1436         g_hash_table_destroy(session_hash);
1437
1438         dbus_connection_unref(connection);
1439 }