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 char *session2bearer(struct connman_session *session)
 164 {
 165         struct session_info *info = &session->info;
 166         GSList *list;
 167         struct bearer_info *bearer_info;
 168         enum connman_service_type type;
 169
 170         if (info->service == NULL)
 171                 return "";
 172
 173         type = connman_service_get_type(info->service);
 174
 175         for (list = info->allowed_bearers;
 176                         list != NULL; list = list->next) {
 177                 bearer_info = list->data;
 178
 179                 if (bearer_info->match_all)
 180                         return service2bearer(type);
 181
 182                 if (bearer_info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN)
 183                         return bearer_info->name;
 184
 185                 if (bearer_info->service_type == type)
 186                         return service2bearer(type);
 187         }
 188
 189         return "";
 190
 191 }
 192
 193 static void cleanup_bearer_info(gpointer data, gpointer user_data)
 194 {
 195         struct bearer_info *info = data;
 196
 197         g_free(info->name);
 198         g_free(info);
 199 }
 200
 201 static GSList *session_parse_allowed_bearers(DBusMessageIter *iter)
 202 {
 203         struct bearer_info *info;
 204         DBusMessageIter array;
 205         GSList *list = NULL;
 206
 207         dbus_message_iter_recurse(iter, &array);
 208
 209         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_STRING) {
 210                 char *bearer = NULL;
 211
 212                 dbus_message_iter_get_basic(&array, &bearer);
 213
 214                 info = g_try_new0(struct bearer_info, 1);
 215                 if (info == NULL) {
 216                         g_slist_foreach(list, cleanup_bearer_info, NULL);
 217                         g_slist_free(list);
 218
 219                         return NULL;
 220                 }
 221
 222                 info->name = g_strdup(bearer);
 223                 info->service_type = bearer2service(info->name);
 224
 225                 if (info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN &&
 226                                 g_strcmp0(info->name, "*") == 0) {
 227                         info->match_all = TRUE;
 228                 } else {
 229                         info->match_all = FALSE;
 230                 }
 231
 232                 list = g_slist_append(list, info);
 233
 234                 dbus_message_iter_next(&array);
 235         }
 236
 237         return list;
 238 }
 239
 240 static GSList *session_allowed_bearers_any(void)
 241 {
 242         struct bearer_info *info;
 243         GSList *list = NULL;
 244
 245         info = g_try_new0(struct bearer_info, 1);
 246         if (info == NULL) {
 247                 g_slist_free(list);
 248
 249                 return NULL;
 250         }
 251
 252         info->name = g_strdup("");
 253         info->match_all = TRUE;
 254         info->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 255
 256         list = g_slist_append(list, info);
 257
 258         return list;
 259 }
 260
 261 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 262 {
 263         struct session_info *info = user_data;
 264         GSList *list;
 265
 266         for (list = info->allowed_bearers;
 267                         list != NULL; list = list->next) {
 268                 struct bearer_info *info = list->data;
 269
 270                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 271                                                 &info->name);
 272         }
 273 }
 274
 275 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 276 {
 277         struct connman_service *service = user_data;
 278         struct connman_ipconfig *ipconfig_ipv4;
 279
 280         if (service == NULL)
 281                 return;
 282
 283         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 284         if (ipconfig_ipv4 == NULL)
 285                 return;
 286
 287         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 288 }
 289
 290 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 291 {
 292         struct connman_service *service = user_data;
 293         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 294
 295         if (service == NULL)
 296                 return;
 297
 298         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 299         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 300         if (ipconfig_ipv6 == NULL)
 301                 return;
 302
 303         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 304 }
 305
 306 static void append_notify(DBusMessageIter *dict,
 307                                         struct connman_session *session)
 308 {
 309         struct session_info *info = &session->info;
 310         struct session_info *info_last = &session->info_last;
 311         const char *policy;
 312
 313         if (session->append_all == TRUE ||
 314                         info->bearer != info_last->bearer) {
 315                 connman_dbus_dict_append_basic(dict, "Bearer",
 316                                                 DBUS_TYPE_STRING,
 317                                                 &info->bearer);
 318                 info_last->bearer = info->bearer;
 319         }
 320
 321         if (session->append_all == TRUE ||
 322                         info->online != info_last->online) {
 323                 connman_dbus_dict_append_basic(dict, "Online",
 324                                                 DBUS_TYPE_BOOLEAN,
 325                                                 &info->online);
 326                 info_last->online = info->online;
 327         }
 328
 329         if (session->append_all == TRUE ||
 330                         info->name != info_last->name) {
 331                 connman_dbus_dict_append_basic(dict, "Name",
 332                                                 DBUS_TYPE_STRING,
 333                                                 &info->name);
 334                 info_last->name = info->name;
 335         }
 336
 337         if (session->append_all == TRUE ||
 338                         info->service != info_last->service) {
 339                 connman_dbus_dict_append_dict(dict, "IPv4",
 340                                                 append_ipconfig_ipv4,
 341                                                 info->service);
 342
 343                 connman_dbus_dict_append_dict(dict, "IPv6",
 344                                                 append_ipconfig_ipv6,
 345                                                 info->service);
 346
 347                 connman_dbus_dict_append_basic(dict, "Interface",
 348                                                 DBUS_TYPE_STRING,
 349                                                 &info->ifname);
 350
 351                 info_last->service = info->service;
 352         }
 353
 354
 355         if (session->append_all == TRUE ||
 356                         info->priority != info_last->priority) {
 357                 connman_dbus_dict_append_basic(dict, "Priority",
 358                                                 DBUS_TYPE_BOOLEAN,
 359                                                 &info->priority);
 360                 info_last->priority = info->priority;
 361         }
 362
 363         if (session->append_all == TRUE ||
 364                         info->allowed_bearers != info_last->allowed_bearers) {
 365                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 366                                                 DBUS_TYPE_STRING,
 367                                                 append_allowed_bearers,
 368                                                 info);
 369                 info_last->allowed_bearers = info->allowed_bearers;
 370         }
 371
 372         if (session->append_all == TRUE ||
 373                         info->avoid_handover != info_last->avoid_handover) {
 374                 connman_dbus_dict_append_basic(dict, "AvoidHandover",
 375                                                 DBUS_TYPE_BOOLEAN,
 376                                                 &info->avoid_handover);
 377                 info_last->avoid_handover = info->avoid_handover;
 378         }
 379
 380         if (session->append_all == TRUE ||
 381                         info->stay_connected != info_last->stay_connected) {
 382                 connman_dbus_dict_append_basic(dict, "StayConnected",
 383                                                 DBUS_TYPE_BOOLEAN,
 384                                                 &info->stay_connected);
 385                 info_last->stay_connected = info->stay_connected;
 386         }
 387
 388         if (session->append_all == TRUE ||
 389                         info->periodic_connect != info_last->periodic_connect) {
 390                 connman_dbus_dict_append_basic(dict, "PeriodicConnect",
 391                                                 DBUS_TYPE_UINT32,
 392                                                 &info->periodic_connect);
 393                 info_last->periodic_connect = info->periodic_connect;
 394         }
 395
 396         if (session->append_all == TRUE ||
 397                         info->idle_timeout != info_last->idle_timeout) {
 398                 connman_dbus_dict_append_basic(dict, "IdleTimeout",
 399                                                 DBUS_TYPE_UINT32,
 400                                                 &info->idle_timeout);
 401                 info_last->idle_timeout = info->idle_timeout;
 402         }
 403
 404         if (session->append_all == TRUE ||
 405                         info->ecall != info_last->ecall) {
 406                 connman_dbus_dict_append_basic(dict, "EmergencyCall",
 407                                                 DBUS_TYPE_BOOLEAN,
 408                                                 &info->ecall);
 409                 info_last->ecall = info->ecall;
 410         }
 411
 412         if (session->append_all == TRUE ||
 413                         info->roaming_policy != info_last->roaming_policy) {
 414                 policy = roamingpolicy2string(info->roaming_policy);
 415                 connman_dbus_dict_append_basic(dict, "RoamingPolicy",
 416                                                 DBUS_TYPE_STRING,
 417                                                 &policy);
 418                 info_last->roaming_policy = info->roaming_policy;
 419         }
 420
 421         if (session->append_all == TRUE ||
 422                         info->marker != info_last->marker) {
 423                 connman_dbus_dict_append_basic(dict, "SessionMarker",
 424                                                 DBUS_TYPE_UINT32,
 425                                                 &info->marker);
 426                 info_last->marker = info->marker;
 427         }
 428
 429         session->append_all = FALSE;
 430         session->info_dirty = FALSE;
 431 }
 432
 433 static int session_notify(struct connman_session *session)
 434 {
 435         DBusMessage *msg;
 436         DBusMessageIter array, dict;
 437
 438         if (session->info_dirty == FALSE)
 439                 return 0;
 440
 441         DBG("session %p owner %s notify_path %s", session,
 442                 session->owner, session->notify_path);
 443
 444         msg = dbus_message_new_method_call(session->owner, session->notify_path,
 445                                                 CONNMAN_NOTIFICATION_INTERFACE,
 446                                                 "Update");
 447         if (msg == NULL)
 448                 return -ENOMEM;
 449
 450         dbus_message_iter_init_append(msg, &array);
 451         connman_dbus_dict_open(&array, &dict);
 452
 453         append_notify(&dict, session);
 454
 455         connman_dbus_dict_close(&array, &dict);
 456
 457         g_dbus_send_message(connection, msg);
 458
 459         session->info_dirty = FALSE;
 460
 461         return 0;
 462 }
 463
 464 static void ipconfig_ipv4_changed(struct connman_session *session)
 465 {
 466         struct session_info *info = &session->info;
 467
 468         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 469                                                 "IPv4", append_ipconfig_ipv4,
 470                                                 info->service);
 471 }
 472
 473 static void ipconfig_ipv6_changed(struct connman_session *session)
 474 {
 475         struct session_info *info = &session->info;
 476
 477         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 478                                                 "IPv6", append_ipconfig_ipv6,
 479                                                 info->service);
 480 }
 481
 482 static connman_bool_t service_type_match(struct connman_session *session,
 483                                         struct connman_service *service)
 484 {
 485         struct session_info *info = &session->info;
 486         GSList *list;
 487
 488         for (list = info->allowed_bearers;
 489                         list != NULL; list = list->next) {
 490                 struct bearer_info *info = list->data;
 491                 enum connman_service_type service_type;
 492
 493                 if (info->match_all == TRUE)
 494                         return TRUE;
 495
 496                 service_type = connman_service_get_type(service);
 497                 if (info->service_type == service_type)
 498                         return TRUE;
 499         }
 500
 501         return FALSE;
 502 }
 503
 504 static connman_bool_t service_match(struct connman_session *session,
 505                                         struct connman_service *service)
 506 {
 507         if (service_type_match(session, service) == FALSE)
 508                 return FALSE;
 509
 510         return TRUE;
 511 }
 512
 513 static int service_type_weight(enum connman_service_type type)
 514 {
 515         /*
 516          * The session doesn't care which service
 517          * to use. Nevertheless we have to sort them
 518          * according their type. The ordering is
 519          *
 520          * 1. Ethernet
 521          * 2. Bluetooth
 522          * 3. WiFi/WiMAX
 523          * 4. GSM/UTMS/3G
 524          */
 525
 526         switch (type) {
 527         case CONNMAN_SERVICE_TYPE_ETHERNET:
 528                 return 4;
 529         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 530                 return 3;
 531         case CONNMAN_SERVICE_TYPE_WIFI:
 532         case CONNMAN_SERVICE_TYPE_WIMAX:
 533                 return 2;
 534         case CONNMAN_SERVICE_TYPE_CELLULAR:
 535                 return 1;
 536         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 537         case CONNMAN_SERVICE_TYPE_SYSTEM:
 538         case CONNMAN_SERVICE_TYPE_GPS:
 539         case CONNMAN_SERVICE_TYPE_VPN:
 540         case CONNMAN_SERVICE_TYPE_GADGET:
 541                 break;
 542         }
 543
 544         return 0;
 545 }
 546
 547 static gint sort_allowed_bearers(struct connman_service *service_a,
 548                                         struct connman_service *service_b,
 549                                         struct connman_session *session)
 550 {
 551         struct session_info *info = &session->info;
 552         GSList *list;
 553         enum connman_service_type type_a, type_b;
 554         int weight_a, weight_b;
 555
 556         type_a = connman_service_get_type(service_a);
 557         type_b = connman_service_get_type(service_b);
 558
 559         for (list = info->allowed_bearers;
 560                         list != NULL; list = list->next) {
 561                 struct bearer_info *info = list->data;
 562
 563                 if (info->match_all == TRUE) {
 564                         if (type_a != type_b) {
 565                                 weight_a = service_type_weight(type_a);
 566                                 weight_b = service_type_weight(type_b);
 567
 568                                 if (weight_a > weight_b)
 569                                         return -1;
 570
 571                                 if (weight_a < weight_b)
 572                                         return 1;
 573
 574                                 return 0;
 575                         }
 576                 }
 577
 578                 if (type_a == info->service_type &&
 579                                 type_b == info->service_type) {
 580                         return 0;
 581                 }
 582
 583                 if (type_a == info->service_type &&
 584                                 type_b != info->service_type) {
 585                         return -1;
 586                 }
 587
 588                 if (type_a != info->service_type &&
 589                                 type_b == info->service_type) {
 590                         return 1;
 591                 }
 592         }
 593
 594         return 0;
 595 }
 596
 597 static gint sort_services(gconstpointer a, gconstpointer b, gpointer user_data)
 598 {
 599         struct connman_service *service_a = (void *)a;
 600         struct connman_service *service_b = (void *)b;
 601         struct connman_session *session = user_data;
 602
 603         return sort_allowed_bearers(service_a, service_b, session);
 604 }
 605
 606 static void cleanup_session(gpointer user_data)
 607 {
 608         struct connman_session *session = user_data;
 609         struct session_info *info = &session->info;
 610
 611         DBG("remove %s", session->session_path);
 612
 613         g_sequence_free(session->service_list);
 614
 615         g_slist_foreach(info->allowed_bearers, cleanup_bearer_info, NULL);
 616         g_slist_free(info->allowed_bearers);
 617
 618         g_free(session->owner);
 619         g_free(session->session_path);
 620         g_free(session->notify_path);
 621
 622         g_free(session);
 623 }
 624
 625 static void release_session(gpointer key, gpointer value, gpointer user_data)
 626 {
 627         struct connman_session *session = value;
 628         DBusMessage *message;
 629
 630         DBG("owner %s path %s", session->owner, session->notify_path);
 631
 632         if (session->notify_watch > 0)
 633                 g_dbus_remove_watch(connection, session->notify_watch);
 634
 635         g_dbus_unregister_interface(connection, session->session_path,
 636                                                 CONNMAN_SESSION_INTERFACE);
 637
 638         message = dbus_message_new_method_call(session->owner,
 639                                                 session->notify_path,
 640                                                 CONNMAN_NOTIFICATION_INTERFACE,
 641                                                 "Release");
 642         if (message == NULL)
 643                 return;
 644
 645         dbus_message_set_no_reply(message, TRUE);
 646
 647         g_dbus_send_message(connection, message);
 648 }
 649
 650 static int session_disconnect(struct connman_session *session)
 651 {
 652         DBG("session %p, %s", session, session->owner);
 653
 654         if (session->notify_watch > 0)
 655                 g_dbus_remove_watch(connection, session->notify_watch);
 656
 657         g_dbus_unregister_interface(connection, session->session_path,
 658                                                 CONNMAN_SESSION_INTERFACE);
 659
 660         g_hash_table_remove(session_hash, session->session_path);
 661
 662         return 0;
 663 }
 664
 665 static void owner_disconnect(DBusConnection *conn, void *user_data)
 666 {
 667         struct connman_session *session = user_data;
 668
 669         DBG("session %p, %s died", session, session->owner);
 670
 671         session_disconnect(session);
 672 }
 673
 674 static DBusMessage *destroy_session(DBusConnection *conn,
 675                                         DBusMessage *msg, void *user_data)
 676 {
 677         struct connman_session *session = user_data;
 678
 679         DBG("session %p", session);
 680
 681         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 682 }
 683
 684 static gboolean session_changed_connect(gpointer user_data)
 685 {
 686         struct connman_session *session = user_data;
 687         struct session_info *info = &session->info;
 688
 689         __connman_service_connect(info->service);
 690
 691         return FALSE;
 692 }
 693
 694 static void update_service(struct connman_session *session)
 695 {
 696         struct session_info *info = &session->info;
 697         int idx;
 698
 699         if (info->service != NULL) {
 700                 info->bearer = session2bearer(session);
 701                 info->online = __connman_service_is_connected(info->service);
 702                 info->name = __connman_service_get_name(info->service);
 703                 idx = __connman_service_get_index(info->service);
 704                 info->ifname = connman_inet_ifname(idx);
 705
 706         } else {
 707                 info->bearer = "";
 708                 info->online = FALSE;
 709                 info->name = "";
 710                 info->ifname = "";
 711         }
 712 }
 713
 714 static void session_changed(struct connman_session *session)
 715 {
 716         struct session_info *info = &session->info;
 717         struct session_info *info_last = &session->info_last;
 718         struct connman_service *service = NULL;
 719         GSourceFunc callback = NULL;
 720         GSequenceIter *iter;
 721
 722         /*
 723          * TODO: This only a placeholder for the 'real' algorithm to
 724          * play a bit around. So we are going to improve it step by step.
 725          */
 726
 727         if (info->ecall == TRUE && session != ecall_session)
 728                 goto out;
 729
 730         if (info->connect == FALSE) {
 731                 if (info->service != NULL)
 732                         __connman_service_disconnect(info->service);
 733                 info->service = NULL;
 734                 goto out;
 735         }
 736
 737         iter = g_sequence_get_begin_iter(session->service_list);
 738
 739         while (g_sequence_iter_is_end(iter) == FALSE) {
 740                 service = g_sequence_get(iter);
 741
 742                 if (__connman_service_is_connecting(service) == TRUE ||
 743                                 __connman_service_is_connected(service) == TRUE) {
 744                         break;
 745                 }
 746
 747                 if (__connman_service_is_idle(service) == TRUE &&
 748                                 info->connect == TRUE) {
 749                         callback = session_changed_connect;
 750                         break;
 751                 }
 752
 753                 service = NULL;
 754
 755                 iter = g_sequence_iter_next(iter);
 756         }
 757
 758         if (info->service != NULL && info->service != service) {
 759                 __connman_service_disconnect(info->service);
 760                 info->service = NULL;
 761         }
 762
 763         if (service != NULL) {
 764                 info->service = service;
 765
 766                 if (callback != NULL)
 767                         callback(session);
 768         }
 769
 770 out:
 771         if (info->service != info_last->service)
 772                 update_service(session);
 773 }
 774
 775 static gboolean session_cb(gpointer user_data)
 776 {
 777         struct connman_session *session = user_data;
 778
 779         session_changed(session);
 780         session_notify(session);
 781
 782         return FALSE;
 783 }
 784
 785 static DBusMessage *connect_session(DBusConnection *conn,
 786                                         DBusMessage *msg, void *user_data)
 787 {
 788         struct connman_session *session = user_data;
 789         struct session_info *info = &session->info;
 790
 791         DBG("session %p", session);
 792
 793         info->connect = TRUE;
 794
 795         if (ecall_session != NULL && ecall_session != session)
 796                 return __connman_error_failed(msg, EBUSY);
 797
 798         session->info_dirty = TRUE;
 799
 800         g_timeout_add_seconds(0, session_cb, session);
 801
 802         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 803 }
 804
 805 static DBusMessage *disconnect_session(DBusConnection *conn,
 806                                         DBusMessage *msg, void *user_data)
 807 {
 808         struct connman_session *session = user_data;
 809         struct session_info *info = &session->info;
 810
 811         DBG("session %p", session);
 812
 813         info->connect = FALSE;
 814
 815         if (ecall_session != NULL && ecall_session != session)
 816                 return __connman_error_failed(msg, EBUSY);
 817
 818         session->info_dirty = TRUE;
 819
 820         g_timeout_add_seconds(0, session_cb, session);
 821
 822         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 823 }
 824
 825 static void print_name(gpointer data, gpointer user_data)
 826 {
 827         struct connman_service *service = data;
 828
 829         DBG("service %p type %s name %s", service,
 830                 service2bearer(connman_service_get_type(service)),
 831                 __connman_service_get_name(service));
 832 }
 833
 834 static void update_allowed_bearers(struct connman_session *session)
 835 {
 836         if (session->service_list != NULL)
 837                 g_sequence_free(session->service_list);
 838
 839         session->service_list = __connman_service_get_list(session,
 840                                                                 service_match);
 841         g_sequence_sort(session->service_list, sort_services, session);
 842         g_sequence_foreach(session->service_list, print_name, NULL);
 843
 844         session->info_dirty = TRUE;
 845 }
 846
 847 static void update_ecall_sessions(struct connman_session *session)
 848 {
 849         struct session_info *info = &session->info;
 850         struct connman_session *session_iter;
 851         GHashTableIter iter;
 852         gpointer key, value;
 853
 854         g_hash_table_iter_init(&iter, session_hash);
 855
 856         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 857                 session_iter = value;
 858
 859                 if (session_iter == session)
 860                         continue;
 861
 862                 session_iter->info.ecall = info->ecall;
 863                 session_iter->info_dirty = TRUE;
 864
 865                 g_timeout_add_seconds(0, session_cb, session_iter);
 866         }
 867 }
 868
 869 static void update_ecall(struct connman_session *session)
 870 {
 871         struct session_info *info = &session->info;
 872         struct session_info *info_last = &session->info_last;
 873
 874         DBG("ecall_session %p ecall %d -> %d", ecall_session,
 875                 info_last->ecall, info->ecall);
 876
 877         if (ecall_session == NULL) {
 878                 if (!(info_last->ecall == FALSE && info->ecall == TRUE))
 879                         goto err;
 880
 881                 ecall_session = session;
 882         } else if (ecall_session == session) {
 883                 if (!(info_last->ecall == TRUE && info->ecall == FALSE))
 884                         goto err;
 885
 886                 ecall_session = NULL;
 887         } else {
 888                 goto err;
 889         }
 890
 891         update_ecall_sessions(session);
 892
 893         session->info_dirty = TRUE;
 894         return;
 895
 896 err:
 897         /* not a valid transition */
 898         info->ecall = info_last->ecall;
 899 }
 900
 901 static DBusMessage *change_session(DBusConnection *conn,
 902                                         DBusMessage *msg, void *user_data)
 903 {
 904         struct connman_session *session = user_data;
 905         struct session_info *info = &session->info;
 906         struct session_info *info_last = &session->info_last;
 907         DBusMessageIter iter, value;
 908         const char *name;
 909         GSList *allowed_bearers;
 910
 911         DBG("session %p", session);
 912         if (dbus_message_iter_init(msg, &iter) == FALSE)
 913                 return __connman_error_invalid_arguments(msg);
 914
 915         dbus_message_iter_get_basic(&iter, &name);
 916         dbus_message_iter_next(&iter);
 917         dbus_message_iter_recurse(&iter, &value);
 918
 919         switch (dbus_message_iter_get_arg_type(&value)) {
 920         case DBUS_TYPE_ARRAY:
 921                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
 922                         allowed_bearers = session_parse_allowed_bearers(&value);
 923
 924                         g_slist_foreach(info->allowed_bearers,
 925                                         cleanup_bearer_info, NULL);
 926                         g_slist_free(info->allowed_bearers);
 927
 928                         if (allowed_bearers == NULL) {
 929                                 allowed_bearers = session_allowed_bearers_any();
 930
 931                                 if (allowed_bearers == NULL)
 932                                         return __connman_error_failed(msg, ENOMEM);
 933                         }
 934
 935                         info->allowed_bearers = allowed_bearers;
 936
 937                         update_allowed_bearers(session);
 938                 } else {
 939                         goto err;
 940                 }
 941                 break;
 942         case DBUS_TYPE_BOOLEAN:
 943                 if (g_str_equal(name, "Priority") == TRUE) {
 944                         dbus_message_iter_get_basic(&value,
 945                                         &info->priority);
 946
 947                         if (info_last->priority != info->priority)
 948                                 session->info_dirty = TRUE;
 949                 } else if (g_str_equal(name, "AvoidHandover") == TRUE) {
 950                         dbus_message_iter_get_basic(&value,
 951                                         &info->avoid_handover);
 952
 953                         if (info_last->avoid_handover != info->avoid_handover)
 954                                 session->info_dirty = TRUE;
 955                         } else if (g_str_equal(name, "StayConnected") == TRUE) {
 956                         dbus_message_iter_get_basic(&value,
 957                                         &info->stay_connected);
 958
 959                         if (info_last->stay_connected != info->stay_connected)
 960                                 session->info_dirty = TRUE;
 961                 } else if (g_str_equal(name, "EmergencyCall") == TRUE) {
 962                         dbus_message_iter_get_basic(&value,
 963                                         &info->ecall);
 964
 965                         update_ecall(session);
 966                 } else {
 967                         goto err;
 968                 }
 969                 break;
 970         case DBUS_TYPE_UINT32:
 971                 if (g_str_equal(name, "PeriodicConnect") == TRUE) {
 972                         dbus_message_iter_get_basic(&value,
 973                                         &info->periodic_connect);
 974
 975                         if (info_last->periodic_connect != info->periodic_connect)
 976                                 session->info_dirty = TRUE;
 977                 } else if (g_str_equal(name, "IdleTimeout") == TRUE) {
 978                         dbus_message_iter_get_basic(&value,
 979                                         &info->idle_timeout);
 980
 981                         if (info_last->idle_timeout != info->idle_timeout)
 982                                 session->info_dirty = TRUE;
 983                 } else {
 984                         goto err;
 985                 }
 986                 break;
 987         case DBUS_TYPE_STRING:
 988                 if (g_str_equal(name, "RoamingPolicy") == TRUE) {
 989                         const char *val;
 990                         dbus_message_iter_get_basic(&value, &val);
 991                         info->roaming_policy =
 992                                         string2roamingpolicy(val);
 993
 994                         if (info_last->roaming_policy != info->roaming_policy)
 995                                 session->info_dirty = TRUE;
 996                 } else {
 997                         goto err;
 998                 }
 999                 break;
1000         default:
1001                 goto err;
1002         }
1003
1004         if (session->info_dirty == TRUE)
1005                 session_cb(session);
1006
1007         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1008
1009 err:
1010         return __connman_error_invalid_arguments(msg);
1011 }
1012
1013 static GDBusMethodTable session_methods[] = {
1014         { "Destroy",    "",   "", destroy_session    },
1015         { "Connect",    "",   "", connect_session    },
1016         { "Disconnect", "",   "", disconnect_session },
1017         { "Change",     "sv", "", change_session     },
1018         { },
1019 };
1020
1021 int __connman_session_create(DBusMessage *msg)
1022 {
1023         const char *owner, *notify_path;
1024         char *session_path = NULL;
1025         DBusMessageIter iter, array;
1026         struct connman_session *session;
1027         struct session_info *info, *info_last;
1028
1029         connman_bool_t priority = FALSE, avoid_handover = FALSE;
1030         connman_bool_t stay_connected = FALSE, ecall = FALSE;
1031         enum connman_session_roaming_policy roaming_policy =
1032                                 CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
1033         GSList *allowed_bearers = NULL;
1034         unsigned int periodic_connect = 0;
1035         unsigned int idle_timeout = 0;
1036
1037         int err;
1038
1039         owner = dbus_message_get_sender(msg);
1040
1041         DBG("owner %s", owner);
1042
1043         if (ecall_session != NULL) {
1044                 /*
1045                  * If there is an emergency call already going on,
1046                  * ignore session creation attempt
1047                  */
1048                 err = -EBUSY;
1049                 goto err;
1050         }
1051
1052         dbus_message_iter_init(msg, &iter);
1053         dbus_message_iter_recurse(&iter, &array);
1054
1055         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1056                 DBusMessageIter entry, value;
1057                 const char *key, *val;
1058
1059                 dbus_message_iter_recurse(&array, &entry);
1060                 dbus_message_iter_get_basic(&entry, &key);
1061
1062                 dbus_message_iter_next(&entry);
1063                 dbus_message_iter_recurse(&entry, &value);
1064
1065                 switch (dbus_message_iter_get_arg_type(&value)) {
1066                 case DBUS_TYPE_ARRAY:
1067                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
1068                                 allowed_bearers =
1069                                         session_parse_allowed_bearers(&value);
1070                         } else {
1071                                 return -EINVAL;
1072                         }
1073                         break;
1074                 case DBUS_TYPE_BOOLEAN:
1075                         if (g_str_equal(key, "Priority") == TRUE) {
1076                                 dbus_message_iter_get_basic(&value,
1077                                                         &priority);
1078                         } else if (g_str_equal(key, "AvoidHandover") == TRUE) {
1079                                 dbus_message_iter_get_basic(&value,
1080                                                         &avoid_handover);
1081                         } else if (g_str_equal(key, "StayConnected") == TRUE) {
1082                                 dbus_message_iter_get_basic(&value,
1083                                                         &stay_connected);
1084                         } else if (g_str_equal(key, "EmergencyCall") == TRUE) {
1085                                 dbus_message_iter_get_basic(&value,
1086                                                         &ecall);
1087                         } else {
1088                                 return -EINVAL;
1089                         }
1090                         break;
1091                 case DBUS_TYPE_UINT32:
1092                         if (g_str_equal(key, "PeriodicConnect") == TRUE) {
1093                                 dbus_message_iter_get_basic(&value,
1094                                                         &periodic_connect);
1095                         } else if (g_str_equal(key, "IdleTimeout") == TRUE) {
1096                                 dbus_message_iter_get_basic(&value,
1097                                                         &idle_timeout);
1098                         } else {
1099                                 return -EINVAL;
1100                         }
1101                         break;
1102                 case DBUS_TYPE_STRING:
1103                         if (g_str_equal(key, "RoamingPolicy") == TRUE) {
1104                                 dbus_message_iter_get_basic(&value, &val);
1105                                 roaming_policy = string2roamingpolicy(val);
1106                         } else {
1107                                 return -EINVAL;
1108                         }
1109                 }
1110                 dbus_message_iter_next(&array);
1111         }
1112
1113         dbus_message_iter_next(&iter);
1114         dbus_message_iter_get_basic(&iter, &notify_path);
1115
1116         if (notify_path == NULL) {
1117                 err = -EINVAL;
1118                 goto err;
1119         }
1120
1121         session_path = g_strdup_printf("/sessions%s", notify_path);
1122         if (session_path == NULL) {
1123                 err = -ENOMEM;
1124                 goto err;
1125         }
1126
1127         session = g_hash_table_lookup(session_hash, session_path);
1128         if (session != NULL) {
1129                 err = -EEXIST;
1130                 goto err;
1131         }
1132
1133         session = g_try_new0(struct connman_session, 1);
1134         if (session == NULL) {
1135                 err = -ENOMEM;
1136                 goto err;
1137         }
1138
1139         info = &session->info;
1140         info_last = &session->info_last;
1141
1142         session->owner = g_strdup(owner);
1143         session->session_path = session_path;
1144         session->notify_path = g_strdup(notify_path);
1145         session->notify_watch =
1146                 g_dbus_add_disconnect_watch(connection, session->owner,
1147                                         owner_disconnect, session, NULL);
1148
1149         info->bearer = "";
1150         info->online = FALSE;
1151         info->priority = priority;
1152         info->avoid_handover = avoid_handover;
1153         info->stay_connected = stay_connected;
1154         info->periodic_connect = periodic_connect;
1155         info->idle_timeout = idle_timeout;
1156         info->ecall = ecall;
1157         info->roaming_policy = roaming_policy;
1158         info->service = NULL;
1159         info->marker = 0;
1160
1161         if (allowed_bearers == NULL) {
1162                 info->allowed_bearers =
1163                                 session_allowed_bearers_any();
1164
1165                 if (info->allowed_bearers == NULL) {
1166                         err = -ENOMEM;
1167                         goto err;
1168                 }
1169         } else {
1170                 info->allowed_bearers = allowed_bearers;
1171         }
1172
1173         g_hash_table_replace(session_hash, session->session_path, session);
1174
1175         DBG("add %s", session->session_path);
1176
1177         if (g_dbus_register_interface(connection, session->session_path,
1178                                         CONNMAN_SESSION_INTERFACE,
1179                                         session_methods, NULL,
1180                                         NULL, session, NULL) == FALSE) {
1181                 connman_error("Failed to register %s", session->session_path);
1182                 g_hash_table_remove(session_hash, session->session_path);
1183                 session = NULL;
1184
1185                 err = -EINVAL;
1186                 goto err;
1187         }
1188
1189         g_dbus_send_reply(connection, msg,
1190                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1191                                 DBUS_TYPE_INVALID);
1192
1193
1194         update_allowed_bearers(session);
1195         update_service(session);
1196         if (info->ecall == TRUE) {
1197                 ecall_session = session;
1198                 update_ecall_sessions(session);
1199         }
1200
1201         info_last->bearer = info->bearer;
1202         info_last->online = 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
1213         session->info_dirty = TRUE;
1214         session->append_all = TRUE;
1215
1216         g_timeout_add_seconds(0, session_cb, session);
1217
1218         return 0;
1219
1220 err:
1221         connman_error("Failed to create session");
1222         g_free(session_path);
1223
1224         g_slist_foreach(allowed_bearers, cleanup_bearer_info, NULL);
1225         g_slist_free(allowed_bearers);
1226
1227         return err;
1228 }
1229
1230 int __connman_session_destroy(DBusMessage *msg)
1231 {
1232         const char *owner, *session_path;
1233         struct connman_session *session;
1234
1235         owner = dbus_message_get_sender(msg);
1236
1237         DBG("owner %s", owner);
1238
1239         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1240                                                         DBUS_TYPE_INVALID);
1241         if (session_path == NULL)
1242                 return -EINVAL;
1243
1244         session = g_hash_table_lookup(session_hash, session_path);
1245         if (session == NULL)
1246                 return -EINVAL;
1247
1248         if (g_strcmp0(owner, session->owner) != 0)
1249                 return -EACCES;
1250
1251         session_disconnect(session);
1252
1253         return 0;
1254 }
1255
1256 connman_bool_t __connman_session_mode()
1257 {
1258         return sessionmode;
1259 }
1260
1261 void __connman_session_set_mode(connman_bool_t enable)
1262 {
1263         DBG("enable %d", enable);
1264
1265         if (sessionmode == enable)
1266                 return;
1267
1268         sessionmode = enable;
1269
1270         if (sessionmode == TRUE)
1271                 __connman_service_disconnect_all();
1272 }
1273
1274 static void service_add(struct connman_service *service)
1275 {
1276         GHashTableIter iter;
1277         gpointer key, value;
1278         struct connman_session *session;
1279
1280         DBG("service %p", service);
1281
1282         g_hash_table_iter_init(&iter, session_hash);
1283
1284         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1285                 session = value;
1286
1287                 if (service_match(session, service) == FALSE)
1288                         continue;
1289
1290                 g_sequence_insert_sorted(session->service_list, service,
1291                                                 sort_services, session);
1292
1293                 session_cb(session);
1294         }
1295 }
1296
1297 static gint service_in_session(gconstpointer a, gconstpointer b,
1298                                 gpointer user_data)
1299 {
1300         if (a == b)
1301                 return 0;
1302
1303         return -1;
1304 }
1305
1306 static void service_remove(struct connman_service *service)
1307 {
1308
1309         GHashTableIter iter;
1310         gpointer key, value;
1311         GSequenceIter *seq_iter;
1312         struct connman_session *session;
1313         struct session_info *info;
1314         struct connman_service *found_service;
1315
1316         DBG("service %p", service);
1317
1318         g_hash_table_iter_init(&iter, session_hash);
1319
1320         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1321                 session = value;
1322                 info = &session->info;
1323
1324                 if (session->service_list == NULL)
1325                         continue;
1326
1327                 seq_iter = g_sequence_search(session->service_list, service,
1328                                                 service_in_session, NULL);
1329                 if (g_sequence_iter_is_end(seq_iter) == TRUE)
1330                         continue;
1331
1332                 g_sequence_remove(seq_iter);
1333
1334                 found_service = g_sequence_get(seq_iter);
1335                 if (found_service != info->service)
1336                         continue;
1337
1338                 info->service = NULL;
1339                 session_cb(session);
1340         }
1341 }
1342
1343 static void service_state_changed(struct connman_service *service,
1344                                         enum connman_service_state state)
1345 {
1346         GHashTableIter iter;
1347         gpointer key, value;
1348         struct connman_session *session;
1349         struct session_info *info;
1350         connman_bool_t online;
1351
1352         DBG("service %p state %d", service, state);
1353
1354         g_hash_table_iter_init(&iter, session_hash);
1355
1356         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1357                 session = value;
1358                 info = &session->info;
1359
1360                 if (info->service == service) {
1361                         online = __connman_service_is_connected(service);
1362                         if (info->online == online)
1363                                 continue;
1364
1365                         info->online = online;
1366                         session_cb(session);
1367                 }
1368         }
1369 }
1370
1371 static void ipconfig_changed(struct connman_service *service,
1372                                 struct connman_ipconfig *ipconfig)
1373 {
1374         GHashTableIter iter;
1375         gpointer key, value;
1376         struct connman_session *session;
1377         struct session_info *info;
1378         enum connman_ipconfig_type type;
1379
1380         DBG("service %p ipconfig %p", service, ipconfig);
1381
1382         type = __connman_ipconfig_get_config_type(ipconfig);
1383
1384         g_hash_table_iter_init(&iter, session_hash);
1385
1386         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1387                 session = value;
1388                 info = &session->info;
1389
1390                 if (info->service == service) {
1391                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
1392                                 ipconfig_ipv4_changed(session);
1393                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
1394                                 ipconfig_ipv6_changed(session);
1395                 }
1396         }
1397 }
1398
1399 static struct connman_notifier session_notifier = {
1400         .name                   = "session",
1401         .service_add            = service_add,
1402         .service_remove         = service_remove,
1403         .service_state_changed  = service_state_changed,
1404         .ipconfig_changed       = ipconfig_changed,
1405 };
1406
1407 int __connman_session_init(void)
1408 {
1409         int err;
1410
1411         DBG("");
1412
1413         connection = connman_dbus_get_connection();
1414         if (connection == NULL)
1415                 return -1;
1416
1417         err = connman_notifier_register(&session_notifier);
1418         if (err < 0) {
1419                 dbus_connection_unref(connection);
1420                 return err;
1421         }
1422
1423         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
1424                                                 NULL, cleanup_session);
1425
1426         sessionmode = FALSE;
1427         return 0;
1428 }
1429
1430 void __connman_session_cleanup(void)
1431 {
1432         DBG("");
1433
1434         if (connection == NULL)
1435                 return;
1436
1437         connman_notifier_unregister(&session_notifier);
1438
1439         g_hash_table_foreach(session_hash, release_session, NULL);
1440         g_hash_table_destroy(session_hash);
1441
1442         dbus_connection_unref(connection);
1443 }