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
  35 enum connman_session_roaming_policy {
  36         CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN          = 0,
  37         CONNMAN_SESSION_ROAMING_POLICY_DEFAULT          = 1,
  38         CONNMAN_SESSION_ROAMING_POLICY_ALWAYS           = 2,
  39         CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN        = 3,
  40         CONNMAN_SESSION_ROAMING_POLICY_NATIONAL         = 4,
  41         CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL    = 5,
  42 };
  43
  44 struct session_info {
  45         char *bearer;
  46         const char *name;
  47         char *ifname;
  48         connman_bool_t connect;
  49         connman_bool_t online;
  50         connman_bool_t priority;
  51         GSList *allowed_bearers;
  52         connman_bool_t avoid_handover;
  53         connman_bool_t stay_connected;
  54         unsigned int periodic_connect;
  55         unsigned int idle_timeout;
  56         connman_bool_t ecall;
  57         enum connman_session_roaming_policy roaming_policy;
  58         unsigned int marker;
  59
  60         struct connman_service *service;
  61 };
  62
  63 struct connman_session {
  64         char *owner;
  65         char *session_path;
  66         char *notify_path;
  67         guint notify_watch;
  68
  69         struct session_info info;
  70         struct session_info info_last;
  71
  72         GSequence *service_list;
  73 };
  74
  75 struct bearer_info {
  76         char *name;
  77         connman_bool_t match_all;
  78         enum connman_service_type service_type;
  79 };
  80
  81 static const char *roamingpolicy2string(enum connman_session_roaming_policy policy)
  82 {
  83         switch (policy) {
  84         case CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN:
  85                 break;
  86         case CONNMAN_SESSION_ROAMING_POLICY_DEFAULT:
  87                 return "default";
  88         case CONNMAN_SESSION_ROAMING_POLICY_ALWAYS:
  89                 return "always";
  90         case CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN:
  91                 return "forbidden";
  92         case CONNMAN_SESSION_ROAMING_POLICY_NATIONAL:
  93                 return "national";
  94         case CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL:
  95                 return "international";
  96         }
  97
  98         return NULL;
  99 }
 100
 101 static enum connman_session_roaming_policy string2roamingpolicy(const char *policy)
 102 {
 103         if (g_strcmp0(policy, "default") == 0)
 104                 return CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 105         else if (g_strcmp0(policy, "always") == 0)
 106                 return CONNMAN_SESSION_ROAMING_POLICY_ALWAYS;
 107         else if (g_strcmp0(policy, "forbidden") == 0)
 108                 return CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
 109         else if (g_strcmp0(policy, "national") == 0)
 110                 return CONNMAN_SESSION_ROAMING_POLICY_NATIONAL;
 111         else if (g_strcmp0(policy, "international") == 0)
 112                 return CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL;
 113         else
 114                 return CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN;
 115 }
 116
 117 static enum connman_service_type bearer2service(const char *bearer)
 118 {
 119         if (bearer == NULL)
 120                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 121
 122         if (g_strcmp0(bearer, "ethernet") == 0)
 123                 return CONNMAN_SERVICE_TYPE_ETHERNET;
 124         else if (g_strcmp0(bearer, "wifi") == 0)
 125                 return CONNMAN_SERVICE_TYPE_WIFI;
 126         else if (g_strcmp0(bearer, "wimax") == 0)
 127                 return CONNMAN_SERVICE_TYPE_WIMAX;
 128         else if (g_strcmp0(bearer, "bluetooth") == 0)
 129                 return CONNMAN_SERVICE_TYPE_BLUETOOTH;
 130         else if (g_strcmp0(bearer, "3g") == 0)
 131                 return CONNMAN_SERVICE_TYPE_CELLULAR;
 132         else
 133                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 134 }
 135
 136 static char *service2bearer(enum connman_service_type type)
 137 {
 138         switch (type) {
 139         case CONNMAN_SERVICE_TYPE_ETHERNET:
 140                 return "ethernet";
 141         case CONNMAN_SERVICE_TYPE_WIFI:
 142                 return "wifi";
 143         case CONNMAN_SERVICE_TYPE_WIMAX:
 144                 return "wimax";
 145         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 146                 return "bluetooth";
 147         case CONNMAN_SERVICE_TYPE_CELLULAR:
 148                 return "3g";
 149         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 150         case CONNMAN_SERVICE_TYPE_SYSTEM:
 151         case CONNMAN_SERVICE_TYPE_GPS:
 152         case CONNMAN_SERVICE_TYPE_VPN:
 153         case CONNMAN_SERVICE_TYPE_GADGET:
 154                 return "";
 155         }
 156
 157         return "";
 158 }
 159
 160 static char *session2bearer(struct connman_session *session)
 161 {
 162         struct session_info *info = &session->info;
 163         GSList *list;
 164         struct bearer_info *bearer_info;
 165         enum connman_service_type type;
 166
 167         if (info->service == NULL)
 168                 return "";
 169
 170         type = connman_service_get_type(info->service);
 171
 172         for (list = info->allowed_bearers;
 173                         list != NULL; list = list->next) {
 174                 bearer_info = list->data;
 175
 176                 if (bearer_info->match_all)
 177                         return service2bearer(type);
 178
 179                 if (bearer_info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN)
 180                         return bearer_info->name;
 181
 182                 if (bearer_info->service_type == type)
 183                         return service2bearer(type);
 184         }
 185
 186         return "";
 187
 188 }
 189
 190 static void cleanup_bearer_info(gpointer data, gpointer user_data)
 191 {
 192         struct bearer_info *info = data;
 193
 194         g_free(info->name);
 195         g_free(info);
 196 }
 197
 198 static GSList *session_parse_allowed_bearers(DBusMessageIter *iter)
 199 {
 200         struct bearer_info *info;
 201         DBusMessageIter array;
 202         GSList *list = NULL;
 203
 204         dbus_message_iter_recurse(iter, &array);
 205
 206         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_STRING) {
 207                 char *bearer = NULL;
 208
 209                 dbus_message_iter_get_basic(&array, &bearer);
 210
 211                 info = g_try_new0(struct bearer_info, 1);
 212                 if (info == NULL) {
 213                         g_slist_foreach(list, cleanup_bearer_info, NULL);
 214                         g_slist_free(list);
 215
 216                         return NULL;
 217                 }
 218
 219                 info->name = g_strdup(bearer);
 220                 info->service_type = bearer2service(info->name);
 221
 222                 if (info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN &&
 223                                 g_strcmp0(info->name, "*") == 0) {
 224                         info->match_all = TRUE;
 225                 } else {
 226                         info->match_all = FALSE;
 227                 }
 228
 229                 list = g_slist_append(list, info);
 230
 231                 dbus_message_iter_next(&array);
 232         }
 233
 234         return list;
 235 }
 236
 237 static GSList *session_allowed_bearers_any(void)
 238 {
 239         struct bearer_info *info;
 240         GSList *list = NULL;
 241
 242         info = g_try_new0(struct bearer_info, 1);
 243         if (info == NULL) {
 244                 g_slist_free(list);
 245
 246                 return NULL;
 247         }
 248
 249         info->name = g_strdup("");
 250         info->match_all = TRUE;
 251         info->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 252
 253         list = g_slist_append(list, info);
 254
 255         return list;
 256 }
 257
 258 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 259 {
 260         struct session_info *info = user_data;
 261         GSList *list;
 262
 263         for (list = info->allowed_bearers;
 264                         list != NULL; list = list->next) {
 265                 struct bearer_info *info = list->data;
 266
 267                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 268                                                 &info->name);
 269         }
 270 }
 271
 272 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 273 {
 274         struct connman_service *service = user_data;
 275         struct connman_ipconfig *ipconfig_ipv4;
 276
 277         if (service == NULL)
 278                 return;
 279
 280         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 281         if (ipconfig_ipv4 == NULL)
 282                 return;
 283
 284         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 285 }
 286
 287 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 288 {
 289         struct connman_service *service = user_data;
 290         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 291
 292         if (service == NULL)
 293                 return;
 294
 295         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 296         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 297         if (ipconfig_ipv6 == NULL)
 298                 return;
 299
 300         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 301 }
 302
 303 static void append_notify(DBusMessageIter *dict,
 304                                         struct connman_session *session)
 305 {
 306         struct session_info *info = &session->info;
 307         struct session_info *info_last = &session->info_last;
 308         const char *policy;
 309
 310         if (info->bearer != info_last->bearer) {
 311                 connman_dbus_dict_append_basic(dict, "Bearer",
 312                                                 DBUS_TYPE_STRING,
 313                                                 &info->bearer);
 314                 info_last->bearer = info->bearer;
 315         }
 316
 317         if (info->online != info_last->online) {
 318                 connman_dbus_dict_append_basic(dict, "Online",
 319                                                 DBUS_TYPE_BOOLEAN,
 320                                                 &info->online);
 321                 info_last->online = info->online;
 322         }
 323
 324         if (info->name != info_last->name) {
 325                 connman_dbus_dict_append_basic(dict, "Name",
 326                                                 DBUS_TYPE_STRING,
 327                                                 &info->name);
 328                 info_last->name = info->name;
 329         }
 330
 331         if (info->service != info_last->service) {
 332                 connman_dbus_dict_append_dict(dict, "IPv4",
 333                                                 append_ipconfig_ipv4,
 334                                                 info->service);
 335
 336                 connman_dbus_dict_append_dict(dict, "IPv6",
 337                                                 append_ipconfig_ipv6,
 338                                                 info->service);
 339
 340                 connman_dbus_dict_append_basic(dict, "Interface",
 341                                                 DBUS_TYPE_STRING,
 342                                                 &info->ifname);
 343
 344                 info_last->service = info->service;
 345         }
 346
 347
 348         if (info->priority != info_last->priority) {
 349                 connman_dbus_dict_append_basic(dict, "Priority",
 350                                                 DBUS_TYPE_BOOLEAN,
 351                                                 &info->priority);
 352                 info_last->priority = info->priority;
 353         }
 354
 355         if (info->allowed_bearers != info_last->allowed_bearers) {
 356                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 357                                                 DBUS_TYPE_STRING,
 358                                                 append_allowed_bearers,
 359                                                 info);
 360                 info_last->allowed_bearers = info->allowed_bearers;
 361         }
 362
 363         if (info->avoid_handover != info_last->avoid_handover) {
 364                 connman_dbus_dict_append_basic(dict, "AvoidHandover",
 365                                                 DBUS_TYPE_BOOLEAN,
 366                                                 &info->avoid_handover);
 367                 info_last->avoid_handover = info->avoid_handover;
 368         }
 369
 370         if (info->stay_connected != info_last->stay_connected) {
 371                 connman_dbus_dict_append_basic(dict, "StayConnected",
 372                                                 DBUS_TYPE_BOOLEAN,
 373                                                 &info->stay_connected);
 374                 info_last->stay_connected = info->stay_connected;
 375         }
 376
 377         if (info->periodic_connect != info_last->periodic_connect) {
 378                 connman_dbus_dict_append_basic(dict, "PeriodicConnect",
 379                                                 DBUS_TYPE_UINT32,
 380                                                 &info->periodic_connect);
 381                 info_last->periodic_connect = info->periodic_connect;
 382         }
 383
 384         if (info->idle_timeout != info_last->idle_timeout) {
 385                 connman_dbus_dict_append_basic(dict, "IdleTimeout",
 386                                                 DBUS_TYPE_UINT32,
 387                                                 &info->idle_timeout);
 388                 info_last->idle_timeout = info->idle_timeout;
 389         }
 390
 391         if (info->ecall != info_last->ecall) {
 392                 connman_dbus_dict_append_basic(dict, "EmergencyCall",
 393                                                 DBUS_TYPE_BOOLEAN,
 394                                                 &info->ecall);
 395                 info_last->ecall = info->ecall;
 396         }
 397
 398         if (info->roaming_policy != info_last->roaming_policy) {
 399                 policy = roamingpolicy2string(info->roaming_policy);
 400                 connman_dbus_dict_append_basic(dict, "RoamingPolicy",
 401                                                 DBUS_TYPE_STRING,
 402                                                 &policy);
 403                 info_last->roaming_policy = info->roaming_policy;
 404         }
 405
 406         if (info->marker != info_last->marker) {
 407                 connman_dbus_dict_append_basic(dict, "SessionMarker",
 408                                                 DBUS_TYPE_UINT32,
 409                                                 &info->marker);
 410                 info_last->marker = info->marker;
 411         }
 412 }
 413
 414 static gboolean session_notify(gpointer user_data)
 415 {
 416         struct connman_session *session = user_data;
 417
 418
 419         DBusMessage *msg;
 420         DBusMessageIter array, dict;
 421
 422         DBG("session %p owner %s notify_path %s", session,
 423                 session->owner, session->notify_path);
 424
 425         msg = dbus_message_new_method_call(session->owner, session->notify_path,
 426                                                 CONNMAN_NOTIFICATION_INTERFACE,
 427                                                 "Update");
 428         if (msg == NULL) {
 429                 connman_error("Could not create notification message");
 430                 return FALSE;
 431         }
 432
 433         dbus_message_iter_init_append(msg, &array);
 434         connman_dbus_dict_open(&array, &dict);
 435
 436         append_notify(&dict, session);
 437
 438         connman_dbus_dict_close(&array, &dict);
 439
 440         g_dbus_send_message(connection, msg);
 441
 442         return FALSE;
 443 }
 444
 445 static void ipconfig_ipv4_changed(struct connman_session *session)
 446 {
 447         struct session_info *info = &session->info;
 448
 449         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 450                                                 "IPv4", append_ipconfig_ipv4,
 451                                                 info->service);
 452 }
 453
 454 static void ipconfig_ipv6_changed(struct connman_session *session)
 455 {
 456         struct session_info *info = &session->info;
 457
 458         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 459                                                 "IPv6", append_ipconfig_ipv6,
 460                                                 info->service);
 461 }
 462
 463 static connman_bool_t service_type_match(struct connman_session *session,
 464                                         struct connman_service *service)
 465 {
 466         struct session_info *info = &session->info;
 467         GSList *list;
 468
 469         for (list = info->allowed_bearers;
 470                         list != NULL; list = list->next) {
 471                 struct bearer_info *info = list->data;
 472                 enum connman_service_type service_type;
 473
 474                 if (info->match_all == TRUE)
 475                         return TRUE;
 476
 477                 service_type = connman_service_get_type(service);
 478                 if (info->service_type == service_type)
 479                         return TRUE;
 480         }
 481
 482         return FALSE;
 483 }
 484
 485 static connman_bool_t service_match(struct connman_session *session,
 486                                         struct connman_service *service)
 487 {
 488         if (service_type_match(session, service) == FALSE)
 489                 return FALSE;
 490
 491         return TRUE;
 492 }
 493
 494 static int service_type_weight(enum connman_service_type type)
 495 {
 496         /*
 497          * The session doesn't care which service
 498          * to use. Nevertheless we have to sort them
 499          * according their type. The ordering is
 500          *
 501          * 1. Ethernet
 502          * 2. Bluetooth
 503          * 3. WiFi/WiMAX
 504          * 4. GSM/UTMS/3G
 505          */
 506
 507         switch (type) {
 508         case CONNMAN_SERVICE_TYPE_ETHERNET:
 509                 return 4;
 510         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 511                 return 3;
 512         case CONNMAN_SERVICE_TYPE_WIFI:
 513         case CONNMAN_SERVICE_TYPE_WIMAX:
 514                 return 2;
 515         case CONNMAN_SERVICE_TYPE_CELLULAR:
 516                 return 1;
 517         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 518         case CONNMAN_SERVICE_TYPE_SYSTEM:
 519         case CONNMAN_SERVICE_TYPE_GPS:
 520         case CONNMAN_SERVICE_TYPE_VPN:
 521         case CONNMAN_SERVICE_TYPE_GADGET:
 522                 break;
 523         }
 524
 525         return 0;
 526 }
 527
 528 static gint sort_allowed_bearers(struct connman_service *service_a,
 529                                         struct connman_service *service_b,
 530                                         struct connman_session *session)
 531 {
 532         struct session_info *info = &session->info;
 533         GSList *list;
 534         enum connman_service_type type_a, type_b;
 535         int weight_a, weight_b;
 536
 537         type_a = connman_service_get_type(service_a);
 538         type_b = connman_service_get_type(service_b);
 539
 540         for (list = info->allowed_bearers;
 541                         list != NULL; list = list->next) {
 542                 struct bearer_info *info = list->data;
 543
 544                 if (info->match_all == TRUE) {
 545                         if (type_a != type_b) {
 546                                 weight_a = service_type_weight(type_a);
 547                                 weight_b = service_type_weight(type_b);
 548
 549                                 if (weight_a > weight_b)
 550                                         return -1;
 551
 552                                 if (weight_a < weight_b)
 553                                         return 1;
 554
 555                                 return 0;
 556                         }
 557                 }
 558
 559                 if (type_a == info->service_type &&
 560                                 type_b == info->service_type) {
 561                         return 0;
 562                 }
 563
 564                 if (type_a == info->service_type &&
 565                                 type_b != info->service_type) {
 566                         return -1;
 567                 }
 568
 569                 if (type_a != info->service_type &&
 570                                 type_b == info->service_type) {
 571                         return 1;
 572                 }
 573         }
 574
 575         return 0;
 576 }
 577
 578 static gint sort_services(gconstpointer a, gconstpointer b, gpointer user_data)
 579 {
 580         struct connman_service *service_a = (void *)a;
 581         struct connman_service *service_b = (void *)b;
 582         struct connman_session *session = user_data;
 583
 584         return sort_allowed_bearers(service_a, service_b, session);
 585 }
 586
 587 static void print_name(gpointer data, gpointer user_data)
 588 {
 589         struct connman_service *service = data;
 590
 591         DBG("service %p type %s name %s", service,
 592                 service2bearer(connman_service_get_type(service)),
 593                 __connman_service_get_name(service));
 594 }
 595
 596 static void cleanup_session(gpointer user_data)
 597 {
 598         struct connman_session *session = user_data;
 599         struct session_info *info = &session->info;
 600
 601         DBG("remove %s", session->session_path);
 602
 603         g_sequence_free(session->service_list);
 604
 605         g_slist_foreach(info->allowed_bearers, cleanup_bearer_info, NULL);
 606         g_slist_free(info->allowed_bearers);
 607
 608         g_free(session->owner);
 609         g_free(session->session_path);
 610         g_free(session->notify_path);
 611
 612         g_free(session);
 613 }
 614
 615 static void release_session(gpointer key, gpointer value, gpointer user_data)
 616 {
 617         struct connman_session *session = value;
 618         DBusMessage *message;
 619
 620         DBG("owner %s path %s", session->owner, session->notify_path);
 621
 622         if (session->notify_watch > 0)
 623                 g_dbus_remove_watch(connection, session->notify_watch);
 624
 625         g_dbus_unregister_interface(connection, session->session_path,
 626                                                 CONNMAN_SESSION_INTERFACE);
 627
 628         message = dbus_message_new_method_call(session->owner,
 629                                                 session->notify_path,
 630                                                 CONNMAN_NOTIFICATION_INTERFACE,
 631                                                 "Release");
 632         if (message == NULL)
 633                 return;
 634
 635         dbus_message_set_no_reply(message, TRUE);
 636
 637         g_dbus_send_message(connection, message);
 638 }
 639
 640 static int session_disconnect(struct connman_session *session)
 641 {
 642         DBG("session %p, %s", session, session->owner);
 643
 644         if (session->notify_watch > 0)
 645                 g_dbus_remove_watch(connection, session->notify_watch);
 646
 647         g_dbus_unregister_interface(connection, session->session_path,
 648                                                 CONNMAN_SESSION_INTERFACE);
 649
 650         g_hash_table_remove(session_hash, session->session_path);
 651
 652         return 0;
 653 }
 654
 655 static void owner_disconnect(DBusConnection *conn, void *user_data)
 656 {
 657         struct connman_session *session = user_data;
 658
 659         DBG("session %p, %s died", session, session->owner);
 660
 661         session_disconnect(session);
 662 }
 663
 664 static DBusMessage *destroy_session(DBusConnection *conn,
 665                                         DBusMessage *msg, void *user_data)
 666 {
 667         struct connman_session *session = user_data;
 668
 669         DBG("session %p", session);
 670
 671         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 672 }
 673
 674 static gboolean session_changed_connect(gpointer user_data)
 675 {
 676         struct connman_session *session = user_data;
 677         struct session_info *info = &session->info;
 678
 679         __connman_service_connect(info->service);
 680
 681         return FALSE;
 682 }
 683
 684 static void update_service(struct connman_session *session)
 685 {
 686         struct session_info *info = &session->info;
 687         int idx;
 688
 689         if (info->service != NULL) {
 690                 info->bearer = session2bearer(session);
 691                 info->online = __connman_service_is_connected(info->service);
 692                 info->name = __connman_service_get_name(info->service);
 693                 idx = __connman_service_get_index(info->service);
 694                 info->ifname = connman_inet_ifname(idx);
 695
 696         } else {
 697                 info->bearer = "";
 698                 info->online = FALSE;
 699                 info->name = "";
 700                 info->ifname = "";
 701         }
 702 }
 703
 704 static void session_changed(struct connman_session *session)
 705 {
 706         struct session_info *info = &session->info;
 707         struct session_info *info_last = &session->info_last;
 708         struct connman_service *service = NULL;
 709         GSourceFunc callback = NULL;
 710         GSequenceIter *iter;
 711
 712         /*
 713          * TODO: This only a placeholder for the 'real' algorithm to
 714          * play a bit around. So we are going to improve it step by step.
 715          */
 716
 717         if (info->connect == FALSE) {
 718                 if (info->service != NULL)
 719                         __connman_service_disconnect(info->service);
 720                 info->service = NULL;
 721                 goto out;
 722         }
 723
 724         iter = g_sequence_get_begin_iter(session->service_list);
 725
 726         while (g_sequence_iter_is_end(iter) == FALSE) {
 727                 service = g_sequence_get(iter);
 728
 729                 if (__connman_service_is_connecting(service) == TRUE ||
 730                                 __connman_service_is_connected(service) == TRUE) {
 731                         break;
 732                 }
 733
 734                 if (__connman_service_is_idle(service) == TRUE &&
 735                                 info->connect == TRUE) {
 736                         callback = session_changed_connect;
 737                         break;
 738                 }
 739
 740                 service = NULL;
 741
 742                 iter = g_sequence_iter_next(iter);
 743         }
 744
 745         if (info->service != NULL && info->service != service) {
 746                 __connman_service_disconnect(info->service);
 747                 info->service = NULL;
 748         }
 749
 750         if (service != NULL) {
 751                 info->service = service;
 752
 753                 if (callback != NULL)
 754                         callback(session);
 755         }
 756
 757 out:
 758         if (info->service != info_last->service)
 759                 update_service(session);
 760 }
 761
 762 static gboolean session_cb(gpointer user_data)
 763 {
 764         struct connman_session *session = user_data;
 765
 766         session_changed(session);
 767         session_notify(session);
 768
 769         return FALSE;
 770 }
 771
 772 static DBusMessage *connect_session(DBusConnection *conn,
 773                                         DBusMessage *msg, void *user_data)
 774 {
 775         struct connman_session *session = user_data;
 776         struct session_info *info = &session->info;
 777
 778         DBG("session %p", session);
 779
 780         info->connect = TRUE;
 781
 782         g_timeout_add_seconds(0, session_cb, session);
 783
 784         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 785 }
 786
 787 static DBusMessage *disconnect_session(DBusConnection *conn,
 788                                         DBusMessage *msg, void *user_data)
 789 {
 790         struct connman_session *session = user_data;
 791         struct session_info *info = &session->info;
 792
 793         DBG("session %p", session);
 794
 795         info->connect = FALSE;
 796
 797         g_timeout_add_seconds(0, session_cb, session);
 798
 799         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 800 }
 801
 802 static DBusMessage *change_session(DBusConnection *conn,
 803                                         DBusMessage *msg, void *user_data)
 804 {
 805         struct connman_session *session = user_data;
 806         struct session_info *info = &session->info;
 807         DBusMessageIter iter, value;
 808         DBusMessage *reply;
 809         DBusMessageIter reply_array, reply_dict;
 810         const char *name;
 811         GSList *allowed_bearers;
 812
 813         DBG("session %p", session);
 814         if (dbus_message_iter_init(msg, &iter) == FALSE)
 815                 return __connman_error_invalid_arguments(msg);
 816
 817         reply = dbus_message_new_method_call(session->owner,
 818                                                 session->notify_path,
 819                                                 CONNMAN_NOTIFICATION_INTERFACE,
 820                                                 "Update");
 821         if (reply == NULL)
 822                 return __connman_error_failed(msg, ENOMEM);
 823
 824         dbus_message_iter_init_append(reply, &reply_array);
 825         connman_dbus_dict_open(&reply_array, &reply_dict);
 826
 827         dbus_message_iter_get_basic(&iter, &name);
 828         dbus_message_iter_next(&iter);
 829         dbus_message_iter_recurse(&iter, &value);
 830
 831         switch (dbus_message_iter_get_arg_type(&value)) {
 832         case DBUS_TYPE_ARRAY:
 833                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
 834                         allowed_bearers = session_parse_allowed_bearers(&value);
 835
 836                         g_slist_foreach(info->allowed_bearers,
 837                                         cleanup_bearer_info, NULL);
 838                         g_slist_free(info->allowed_bearers);
 839
 840                         if (allowed_bearers == NULL) {
 841                                 allowed_bearers = session_allowed_bearers_any();
 842
 843                                 if (allowed_bearers == NULL) {
 844                                         dbus_message_unref(reply);
 845                                         return __connman_error_failed(msg, ENOMEM);
 846                                 }
 847                         }
 848
 849                         info->allowed_bearers = allowed_bearers;
 850
 851                         /* update_allowed_bearers(); */
 852                 } else {
 853                         goto err;
 854                 }
 855                 break;
 856         case DBUS_TYPE_BOOLEAN:
 857                 if (g_str_equal(name, "Priority") == TRUE) {
 858                         dbus_message_iter_get_basic(&value,
 859                                         &info->priority);
 860
 861                         /* update_priority(); */
 862                 } else if (g_str_equal(name, "AvoidHandover") == TRUE) {
 863                         dbus_message_iter_get_basic(&value,
 864                                         &info->avoid_handover);
 865
 866                         /* update_avoid_handover(); */
 867                 } else if (g_str_equal(name, "StayConnected") == TRUE) {
 868                         dbus_message_iter_get_basic(&value,
 869                                         &info->stay_connected);
 870
 871                         /* update_stay_connected(); */
 872                 } else if (g_str_equal(name, "EmergencyCall") == TRUE) {
 873                         dbus_message_iter_get_basic(&value,
 874                                         &info->ecall);
 875
 876                         /* update_ecall(); */
 877                 } else {
 878                         goto err;
 879                 }
 880                 break;
 881         case DBUS_TYPE_UINT32:
 882                 if (g_str_equal(name, "PeriodicConnect") == TRUE) {
 883                         dbus_message_iter_get_basic(&value,
 884                                         &info->periodic_connect);
 885
 886                         /* update_periodic_update(); */
 887                 } else if (g_str_equal(name, "IdleTimeout") == TRUE) {
 888                         dbus_message_iter_get_basic(&value,
 889                                         &info->idle_timeout);
 890
 891                         /* update_idle_timeout(); */
 892                 } else {
 893                         goto err;
 894                 }
 895                 break;
 896         case DBUS_TYPE_STRING:
 897                 if (g_str_equal(name, "RoamingPolicy") == TRUE) {
 898                         const char *val;
 899                         dbus_message_iter_get_basic(&value, &val);
 900                         info->roaming_policy =
 901                                         string2roamingpolicy(val);
 902
 903                         /* update_roaming_allowed(); */
 904                 } else {
 905                         goto err;
 906                 }
 907                 break;
 908         }
 909
 910         append_notify(&reply_dict, session);
 911
 912         connman_dbus_dict_close(&reply_array, &reply_dict);
 913
 914         g_dbus_send_message(connection, reply);
 915
 916         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 917
 918 err:
 919         dbus_message_unref(reply);
 920         return __connman_error_invalid_arguments(msg);
 921 }
 922
 923 static GDBusMethodTable session_methods[] = {
 924         { "Destroy",    "",   "", destroy_session    },
 925         { "Connect",    "",   "", connect_session    },
 926         { "Disconnect", "",   "", disconnect_session },
 927         { "Change",     "sv", "", change_session     },
 928         { },
 929 };
 930
 931 int __connman_session_create(DBusMessage *msg)
 932 {
 933         const char *owner, *notify_path;
 934         char *session_path;
 935         DBusMessageIter iter, array;
 936         struct connman_session *session;
 937         struct session_info *info, *info_last;
 938
 939         connman_bool_t priority = FALSE, avoid_handover = FALSE;
 940         connman_bool_t stay_connected = FALSE, ecall = FALSE;
 941         enum connman_session_roaming_policy roaming_policy =
 942                                 CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
 943         GSList *allowed_bearers = NULL;
 944         unsigned int periodic_connect = 0;
 945         unsigned int idle_timeout = 0;
 946
 947         int err;
 948
 949         owner = dbus_message_get_sender(msg);
 950
 951         DBG("owner %s", owner);
 952
 953         dbus_message_iter_init(msg, &iter);
 954         dbus_message_iter_recurse(&iter, &array);
 955
 956         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
 957                 DBusMessageIter entry, value;
 958                 const char *key, *val;
 959
 960                 dbus_message_iter_recurse(&array, &entry);
 961                 dbus_message_iter_get_basic(&entry, &key);
 962
 963                 dbus_message_iter_next(&entry);
 964                 dbus_message_iter_recurse(&entry, &value);
 965
 966                 switch (dbus_message_iter_get_arg_type(&value)) {
 967                 case DBUS_TYPE_ARRAY:
 968                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
 969                                 allowed_bearers =
 970                                         session_parse_allowed_bearers(&value);
 971                         } else {
 972                                 return -EINVAL;
 973                         }
 974                         break;
 975                 case DBUS_TYPE_BOOLEAN:
 976                         if (g_str_equal(key, "Priority") == TRUE) {
 977                                 dbus_message_iter_get_basic(&value,
 978                                                         &priority);
 979                         } else if (g_str_equal(key, "AvoidHandover") == TRUE) {
 980                                 dbus_message_iter_get_basic(&value,
 981                                                         &avoid_handover);
 982                         } else if (g_str_equal(key, "StayConnected") == TRUE) {
 983                                 dbus_message_iter_get_basic(&value,
 984                                                         &stay_connected);
 985                         } else if (g_str_equal(key, "EmergencyCall") == TRUE) {
 986                                 dbus_message_iter_get_basic(&value,
 987                                                         &ecall);
 988                         } else {
 989                                 return -EINVAL;
 990                         }
 991                         break;
 992                 case DBUS_TYPE_UINT32:
 993                         if (g_str_equal(key, "PeriodicConnect") == TRUE) {
 994                                 dbus_message_iter_get_basic(&value,
 995                                                         &periodic_connect);
 996                         } else if (g_str_equal(key, "IdleTimeout") == TRUE) {
 997                                 dbus_message_iter_get_basic(&value,
 998                                                         &idle_timeout);
 999                         } else {
1000                                 return -EINVAL;
1001                         }
1002                         break;
1003                 case DBUS_TYPE_STRING:
1004                         if (g_str_equal(key, "RoamingPolicy") == TRUE) {
1005                                 dbus_message_iter_get_basic(&value, &val);
1006                                 roaming_policy = string2roamingpolicy(val);
1007                         } else {
1008                                 return -EINVAL;
1009                         }
1010                 }
1011                 dbus_message_iter_next(&array);
1012         }
1013
1014         dbus_message_iter_next(&iter);
1015         dbus_message_iter_get_basic(&iter, &notify_path);
1016
1017         if (notify_path == NULL) {
1018                 session_path = NULL;
1019                 err = -EINVAL;
1020                 goto err;
1021         }
1022
1023         session_path = g_strdup_printf("/sessions%s", notify_path);
1024         if (session_path == NULL) {
1025                 err = -ENOMEM;
1026                 goto err;
1027         }
1028
1029         session = g_hash_table_lookup(session_hash, session_path);
1030         if (session != NULL) {
1031                 err = -EEXIST;
1032                 goto err;
1033         }
1034
1035         session = g_try_new0(struct connman_session, 1);
1036         if (session == NULL) {
1037                 err = -ENOMEM;
1038                 goto err;
1039         }
1040
1041         info = &session->info;
1042         info_last = &session->info_last;
1043
1044         session->owner = g_strdup(owner);
1045         session->session_path = session_path;
1046         session->notify_path = g_strdup(notify_path);
1047         session->notify_watch =
1048                 g_dbus_add_disconnect_watch(connection, session->owner,
1049                                         owner_disconnect, session, NULL);
1050
1051         info->bearer = "";
1052         info->online = FALSE;
1053         info->priority = priority;
1054         info->avoid_handover = avoid_handover;
1055         info->stay_connected = stay_connected;
1056         info->periodic_connect = periodic_connect;
1057         info->idle_timeout = idle_timeout;
1058         info->ecall = ecall;
1059         info->roaming_policy = roaming_policy;
1060
1061         if (allowed_bearers == NULL) {
1062                 info->allowed_bearers =
1063                                 session_allowed_bearers_any();
1064
1065                 if (info->allowed_bearers == NULL) {
1066                         err = -ENOMEM;
1067                         goto err;
1068                 }
1069         } else {
1070                 info->allowed_bearers = allowed_bearers;
1071         }
1072
1073         info_last->bearer = NULL;
1074         info_last->online = !priority;
1075         info_last->avoid_handover = !avoid_handover;
1076         info_last->stay_connected = !stay_connected;
1077         info_last->periodic_connect = !periodic_connect;
1078         info_last->idle_timeout = !idle_timeout;
1079         info_last->ecall = !ecall;
1080         info_last->roaming_policy =
1081                         CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN;
1082         info_last->allowed_bearers = NULL;
1083         info_last->service = (void *) 1;
1084         info_last->marker = info->marker + 1;
1085
1086         session->service_list = __connman_service_get_list(session,
1087                                                                 service_match);
1088         g_sequence_sort(session->service_list, sort_services, session);
1089         g_sequence_foreach(session->service_list, print_name, NULL);
1090
1091         g_hash_table_replace(session_hash, session->session_path, session);
1092
1093         DBG("add %s", session->session_path);
1094
1095         if (g_dbus_register_interface(connection, session->session_path,
1096                                         CONNMAN_SESSION_INTERFACE,
1097                                         session_methods, NULL,
1098                                         NULL, session, NULL) == FALSE) {
1099                 connman_error("Failed to register %s", session->session_path);
1100                 g_hash_table_remove(session_hash, session->session_path);
1101                 session = NULL;
1102
1103                 err = -EINVAL;
1104                 goto err;
1105         }
1106
1107         g_dbus_send_reply(connection, msg,
1108                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1109                                 DBUS_TYPE_INVALID);
1110
1111         g_timeout_add_seconds(0, session_cb, session);
1112
1113         return 0;
1114
1115 err:
1116         connman_error("Failed to create session");
1117         g_free(session_path);
1118
1119         g_slist_foreach(allowed_bearers, cleanup_bearer_info, NULL);
1120         g_slist_free(allowed_bearers);
1121
1122         return err;
1123 }
1124
1125 int __connman_session_destroy(DBusMessage *msg)
1126 {
1127         const char *owner, *session_path;
1128         struct connman_session *session;
1129
1130         owner = dbus_message_get_sender(msg);
1131
1132         DBG("owner %s", owner);
1133
1134         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1135                                                         DBUS_TYPE_INVALID);
1136         if (session_path == NULL)
1137                 return -EINVAL;
1138
1139         session = g_hash_table_lookup(session_hash, session_path);
1140         if (session == NULL)
1141                 return -EINVAL;
1142
1143         if (g_strcmp0(owner, session->owner) != 0)
1144                 return -EACCES;
1145
1146         session_disconnect(session);
1147
1148         return 0;
1149 }
1150
1151 connman_bool_t __connman_session_mode()
1152 {
1153         return sessionmode;
1154 }
1155
1156 void __connman_session_set_mode(connman_bool_t enable)
1157 {
1158         DBG("enable %d", enable);
1159
1160         if (sessionmode == enable)
1161                 return;
1162
1163         sessionmode = enable;
1164
1165         if (sessionmode == TRUE)
1166                 __connman_service_disconnect_all();
1167 }
1168
1169 static void service_add(struct connman_service *service)
1170 {
1171         GHashTableIter iter;
1172         gpointer key, value;
1173         struct connman_session *session;
1174
1175         DBG("service %p", service);
1176
1177         g_hash_table_iter_init(&iter, session_hash);
1178
1179         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1180                 session = value;
1181
1182                 if (service_match(session, service) == FALSE)
1183                         continue;
1184
1185                 g_sequence_insert_sorted(session->service_list, service,
1186                                                 sort_services, session);
1187
1188                 session_cb(session);
1189         }
1190 }
1191
1192 static gint service_in_session(gconstpointer a, gconstpointer b,
1193                                 gpointer user_data)
1194 {
1195         if (a == b)
1196                 return 0;
1197
1198         return -1;
1199 }
1200
1201 static void service_remove(struct connman_service *service)
1202 {
1203
1204         GHashTableIter iter;
1205         gpointer key, value;
1206         GSequenceIter *seq_iter;
1207         struct connman_session *session;
1208         struct session_info *info;
1209         struct connman_service *found_service;
1210
1211         DBG("service %p", service);
1212
1213         g_hash_table_iter_init(&iter, session_hash);
1214
1215         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1216                 session = value;
1217                 info = &session->info;
1218
1219                 if (session->service_list == NULL)
1220                         continue;
1221
1222                 seq_iter = g_sequence_search(session->service_list, service,
1223                                                 service_in_session, NULL);
1224                 if (g_sequence_iter_is_end(seq_iter) == TRUE)
1225                         continue;
1226
1227                 g_sequence_remove(seq_iter);
1228
1229                 found_service = g_sequence_get(seq_iter);
1230                 if (found_service != info->service)
1231                         continue;
1232
1233                 info->service = NULL;
1234                 session_cb(session);
1235         }
1236 }
1237
1238 static void service_state_changed(struct connman_service *service,
1239                                         enum connman_service_state state)
1240 {
1241         GHashTableIter iter;
1242         gpointer key, value;
1243         struct connman_session *session;
1244         struct session_info *info;
1245         connman_bool_t online;
1246
1247         DBG("service %p state %d", service, state);
1248
1249         g_hash_table_iter_init(&iter, session_hash);
1250
1251         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1252                 session = value;
1253                 info = &session->info;
1254
1255                 if (info->service == service) {
1256                         online = __connman_service_is_connected(service);
1257                         if (info->online == online)
1258                                 continue;
1259
1260                         info->online = online;
1261                         session_cb(session);
1262                 }
1263         }
1264 }
1265
1266 static void ipconfig_changed(struct connman_service *service,
1267                                 struct connman_ipconfig *ipconfig)
1268 {
1269         GHashTableIter iter;
1270         gpointer key, value;
1271         struct connman_session *session;
1272         struct session_info *info;
1273         enum connman_ipconfig_type type;
1274
1275         DBG("service %p ipconfig %p", service, ipconfig);
1276
1277         type = __connman_ipconfig_get_config_type(ipconfig);
1278
1279         g_hash_table_iter_init(&iter, session_hash);
1280
1281         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1282                 session = value;
1283                 info = &session->info;
1284
1285                 if (info->service == service) {
1286                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
1287                                 ipconfig_ipv4_changed(session);
1288                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
1289                                 ipconfig_ipv6_changed(session);
1290                 }
1291         }
1292 }
1293
1294 static struct connman_notifier session_notifier = {
1295         .name                   = "session",
1296         .service_add            = service_add,
1297         .service_remove         = service_remove,
1298         .service_state_changed  = service_state_changed,
1299         .ipconfig_changed       = ipconfig_changed,
1300 };
1301
1302 int __connman_session_init(void)
1303 {
1304         int err;
1305
1306         DBG("");
1307
1308         connection = connman_dbus_get_connection();
1309         if (connection == NULL)
1310                 return -1;
1311
1312         err = connman_notifier_register(&session_notifier);
1313         if (err < 0) {
1314                 dbus_connection_unref(connection);
1315                 return err;
1316         }
1317
1318         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
1319                                                 NULL, cleanup_session);
1320
1321         sessionmode = FALSE;
1322         return 0;
1323 }
1324
1325 void __connman_session_cleanup(void)
1326 {
1327         DBG("");
1328
1329         if (connection == NULL)
1330                 return;
1331
1332         connman_notifier_unregister(&session_notifier);
1333
1334         g_hash_table_foreach(session_hash, release_session, NULL);
1335         g_hash_table_destroy(session_hash);
1336
1337         dbus_connection_unref(connection);
1338 }