src/session.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   6  *  Copyright (C) 2011  BWM CarIT GmbH. All rights reserved.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  *
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <gdbus.h>
  28
  29 #include "connman.h"
  30
  31 static DBusConnection *connection;
  32 static GHashTable *session_hash;
  33 static connman_bool_t sessionmode;
  34 static struct connman_session *ecall_session;
  35
  36 enum connman_session_roaming_policy {
  37         CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN          = 0,
  38         CONNMAN_SESSION_ROAMING_POLICY_DEFAULT          = 1,
  39         CONNMAN_SESSION_ROAMING_POLICY_ALWAYS           = 2,
  40         CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN        = 3,
  41         CONNMAN_SESSION_ROAMING_POLICY_NATIONAL         = 4,
  42         CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL    = 5,
  43 };
  44
  45 struct session_info {
  46         char *bearer;
  47         const char *name;
  48         char *ifname;
  49         connman_bool_t connect;
  50         connman_bool_t online;
  51         connman_bool_t priority;
  52         GSList *allowed_bearers;
  53         connman_bool_t avoid_handover;
  54         connman_bool_t stay_connected;
  55         unsigned int periodic_connect;
  56         unsigned int idle_timeout;
  57         connman_bool_t ecall;
  58         enum connman_session_roaming_policy roaming_policy;
  59         unsigned int marker;
  60
  61         struct connman_service *service;
  62 };
  63
  64 struct connman_session {
  65         char *owner;
  66         char *session_path;
  67         char *notify_path;
  68         guint notify_watch;
  69
  70         connman_bool_t append_all;
  71         connman_bool_t info_dirty;
  72         struct session_info info;
  73         struct session_info info_last;
  74
  75         GSequence *service_list;
  76 };
  77
  78 struct bearer_info {
  79         char *name;
  80         connman_bool_t match_all;
  81         enum connman_service_type service_type;
  82 };
  83
  84 static const char *roamingpolicy2string(enum connman_session_roaming_policy policy)
  85 {
  86         switch (policy) {
  87         case CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN:
  88                 break;
  89         case CONNMAN_SESSION_ROAMING_POLICY_DEFAULT:
  90                 return "default";
  91         case CONNMAN_SESSION_ROAMING_POLICY_ALWAYS:
  92                 return "always";
  93         case CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN:
  94                 return "forbidden";
  95         case CONNMAN_SESSION_ROAMING_POLICY_NATIONAL:
  96                 return "national";
  97         case CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL:
  98                 return "international";
  99         }
 100
 101         return NULL;
 102 }
 103
 104 static enum connman_session_roaming_policy string2roamingpolicy(const char *policy)
 105 {
 106         if (g_strcmp0(policy, "default") == 0)
 107                 return CONNMAN_SESSION_ROAMING_POLICY_DEFAULT;
 108         else if (g_strcmp0(policy, "always") == 0)
 109                 return CONNMAN_SESSION_ROAMING_POLICY_ALWAYS;
 110         else if (g_strcmp0(policy, "forbidden") == 0)
 111                 return CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
 112         else if (g_strcmp0(policy, "national") == 0)
 113                 return CONNMAN_SESSION_ROAMING_POLICY_NATIONAL;
 114         else if (g_strcmp0(policy, "international") == 0)
 115                 return CONNMAN_SESSION_ROAMING_POLICY_INTERNATIONAL;
 116         else
 117                 return CONNMAN_SESSION_ROAMING_POLICY_UNKNOWN;
 118 }
 119
 120 static enum connman_service_type bearer2service(const char *bearer)
 121 {
 122         if (bearer == NULL)
 123                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 124
 125         if (g_strcmp0(bearer, "ethernet") == 0)
 126                 return CONNMAN_SERVICE_TYPE_ETHERNET;
 127         else if (g_strcmp0(bearer, "wifi") == 0)
 128                 return CONNMAN_SERVICE_TYPE_WIFI;
 129         else if (g_strcmp0(bearer, "wimax") == 0)
 130                 return CONNMAN_SERVICE_TYPE_WIMAX;
 131         else if (g_strcmp0(bearer, "bluetooth") == 0)
 132                 return CONNMAN_SERVICE_TYPE_BLUETOOTH;
 133         else if (g_strcmp0(bearer, "3g") == 0)
 134                 return CONNMAN_SERVICE_TYPE_CELLULAR;
 135         else
 136                 return CONNMAN_SERVICE_TYPE_UNKNOWN;
 137 }
 138
 139 static char *service2bearer(enum connman_service_type type)
 140 {
 141         switch (type) {
 142         case CONNMAN_SERVICE_TYPE_ETHERNET:
 143                 return "ethernet";
 144         case CONNMAN_SERVICE_TYPE_WIFI:
 145                 return "wifi";
 146         case CONNMAN_SERVICE_TYPE_WIMAX:
 147                 return "wimax";
 148         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 149                 return "bluetooth";
 150         case CONNMAN_SERVICE_TYPE_CELLULAR:
 151                 return "3g";
 152         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 153         case CONNMAN_SERVICE_TYPE_SYSTEM:
 154         case CONNMAN_SERVICE_TYPE_GPS:
 155         case CONNMAN_SERVICE_TYPE_VPN:
 156         case CONNMAN_SERVICE_TYPE_GADGET:
 157                 return "";
 158         }
 159
 160         return "";
 161 }
 162
 163 static void cleanup_bearer_info(gpointer data, gpointer user_data)
 164 {
 165         struct bearer_info *info = data;
 166
 167         g_free(info->name);
 168         g_free(info);
 169 }
 170
 171 static GSList *session_parse_allowed_bearers(DBusMessageIter *iter)
 172 {
 173         struct bearer_info *info;
 174         DBusMessageIter array;
 175         GSList *list = NULL;
 176
 177         dbus_message_iter_recurse(iter, &array);
 178
 179         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_STRING) {
 180                 char *bearer = NULL;
 181
 182                 dbus_message_iter_get_basic(&array, &bearer);
 183
 184                 info = g_try_new0(struct bearer_info, 1);
 185                 if (info == NULL) {
 186                         g_slist_foreach(list, cleanup_bearer_info, NULL);
 187                         g_slist_free(list);
 188
 189                         return NULL;
 190                 }
 191
 192                 info->name = g_strdup(bearer);
 193                 info->service_type = bearer2service(info->name);
 194
 195                 if (info->service_type == CONNMAN_SERVICE_TYPE_UNKNOWN &&
 196                                 g_strcmp0(info->name, "*") == 0) {
 197                         info->match_all = TRUE;
 198                 } else {
 199                         info->match_all = FALSE;
 200                 }
 201
 202                 list = g_slist_append(list, info);
 203
 204                 dbus_message_iter_next(&array);
 205         }
 206
 207         return list;
 208 }
 209
 210 static GSList *session_allowed_bearers_any(void)
 211 {
 212         struct bearer_info *info;
 213         GSList *list = NULL;
 214
 215         info = g_try_new0(struct bearer_info, 1);
 216         if (info == NULL) {
 217                 g_slist_free(list);
 218
 219                 return NULL;
 220         }
 221
 222         info->name = g_strdup("");
 223         info->match_all = TRUE;
 224         info->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 225
 226         list = g_slist_append(list, info);
 227
 228         return list;
 229 }
 230
 231 static void append_allowed_bearers(DBusMessageIter *iter, void *user_data)
 232 {
 233         struct session_info *info = user_data;
 234         GSList *list;
 235
 236         for (list = info->allowed_bearers;
 237                         list != NULL; list = list->next) {
 238                 struct bearer_info *info = list->data;
 239
 240                 dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
 241                                                 &info->name);
 242         }
 243 }
 244
 245 static void append_ipconfig_ipv4(DBusMessageIter *iter, void *user_data)
 246 {
 247         struct connman_service *service = user_data;
 248         struct connman_ipconfig *ipconfig_ipv4;
 249
 250         if (service == NULL)
 251                 return;
 252
 253         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 254         if (ipconfig_ipv4 == NULL)
 255                 return;
 256
 257         __connman_ipconfig_append_ipv4(ipconfig_ipv4, iter);
 258 }
 259
 260 static void append_ipconfig_ipv6(DBusMessageIter *iter, void *user_data)
 261 {
 262         struct connman_service *service = user_data;
 263         struct connman_ipconfig *ipconfig_ipv4, *ipconfig_ipv6;
 264
 265         if (service == NULL)
 266                 return;
 267
 268         ipconfig_ipv4 = __connman_service_get_ip4config(service);
 269         ipconfig_ipv6 = __connman_service_get_ip6config(service);
 270         if (ipconfig_ipv6 == NULL)
 271                 return;
 272
 273         __connman_ipconfig_append_ipv6(ipconfig_ipv6, iter, ipconfig_ipv4);
 274 }
 275
 276 static void append_notify(DBusMessageIter *dict,
 277                                         struct connman_session *session)
 278 {
 279         struct session_info *info = &session->info;
 280         struct session_info *info_last = &session->info_last;
 281         const char *policy;
 282
 283         if (session->append_all == TRUE ||
 284                         info->bearer != info_last->bearer) {
 285                 connman_dbus_dict_append_basic(dict, "Bearer",
 286                                                 DBUS_TYPE_STRING,
 287                                                 &info->bearer);
 288                 info_last->bearer = info->bearer;
 289         }
 290
 291         if (session->append_all == TRUE ||
 292                         info->online != info_last->online) {
 293                 connman_dbus_dict_append_basic(dict, "Online",
 294                                                 DBUS_TYPE_BOOLEAN,
 295                                                 &info->online);
 296                 info_last->online = info->online;
 297         }
 298
 299         if (session->append_all == TRUE ||
 300                         info->name != info_last->name) {
 301                 connman_dbus_dict_append_basic(dict, "Name",
 302                                                 DBUS_TYPE_STRING,
 303                                                 &info->name);
 304                 info_last->name = info->name;
 305         }
 306
 307         if (session->append_all == TRUE ||
 308                         info->service != info_last->service) {
 309                 connman_dbus_dict_append_dict(dict, "IPv4",
 310                                                 append_ipconfig_ipv4,
 311                                                 info->service);
 312
 313                 connman_dbus_dict_append_dict(dict, "IPv6",
 314                                                 append_ipconfig_ipv6,
 315                                                 info->service);
 316
 317                 connman_dbus_dict_append_basic(dict, "Interface",
 318                                                 DBUS_TYPE_STRING,
 319                                                 &info->ifname);
 320
 321                 info_last->ifname = info->ifname;
 322                 info_last->service = info->service;
 323         }
 324
 325
 326         if (session->append_all == TRUE ||
 327                         info->priority != info_last->priority) {
 328                 connman_dbus_dict_append_basic(dict, "Priority",
 329                                                 DBUS_TYPE_BOOLEAN,
 330                                                 &info->priority);
 331                 info_last->priority = info->priority;
 332         }
 333
 334         if (session->append_all == TRUE ||
 335                         info->allowed_bearers != info_last->allowed_bearers) {
 336                 connman_dbus_dict_append_array(dict, "AllowedBearers",
 337                                                 DBUS_TYPE_STRING,
 338                                                 append_allowed_bearers,
 339                                                 info);
 340                 info_last->allowed_bearers = info->allowed_bearers;
 341         }
 342
 343         if (session->append_all == TRUE ||
 344                         info->avoid_handover != info_last->avoid_handover) {
 345                 connman_dbus_dict_append_basic(dict, "AvoidHandover",
 346                                                 DBUS_TYPE_BOOLEAN,
 347                                                 &info->avoid_handover);
 348                 info_last->avoid_handover = info->avoid_handover;
 349         }
 350
 351         if (session->append_all == TRUE ||
 352                         info->stay_connected != info_last->stay_connected) {
 353                 connman_dbus_dict_append_basic(dict, "StayConnected",
 354                                                 DBUS_TYPE_BOOLEAN,
 355                                                 &info->stay_connected);
 356                 info_last->stay_connected = info->stay_connected;
 357         }
 358
 359         if (session->append_all == TRUE ||
 360                         info->periodic_connect != info_last->periodic_connect) {
 361                 connman_dbus_dict_append_basic(dict, "PeriodicConnect",
 362                                                 DBUS_TYPE_UINT32,
 363                                                 &info->periodic_connect);
 364                 info_last->periodic_connect = info->periodic_connect;
 365         }
 366
 367         if (session->append_all == TRUE ||
 368                         info->idle_timeout != info_last->idle_timeout) {
 369                 connman_dbus_dict_append_basic(dict, "IdleTimeout",
 370                                                 DBUS_TYPE_UINT32,
 371                                                 &info->idle_timeout);
 372                 info_last->idle_timeout = info->idle_timeout;
 373         }
 374
 375         if (session->append_all == TRUE ||
 376                         info->ecall != info_last->ecall) {
 377                 connman_dbus_dict_append_basic(dict, "EmergencyCall",
 378                                                 DBUS_TYPE_BOOLEAN,
 379                                                 &info->ecall);
 380                 info_last->ecall = info->ecall;
 381         }
 382
 383         if (session->append_all == TRUE ||
 384                         info->roaming_policy != info_last->roaming_policy) {
 385                 policy = roamingpolicy2string(info->roaming_policy);
 386                 connman_dbus_dict_append_basic(dict, "RoamingPolicy",
 387                                                 DBUS_TYPE_STRING,
 388                                                 &policy);
 389                 info_last->roaming_policy = info->roaming_policy;
 390         }
 391
 392         if (session->append_all == TRUE ||
 393                         info->marker != info_last->marker) {
 394                 connman_dbus_dict_append_basic(dict, "SessionMarker",
 395                                                 DBUS_TYPE_UINT32,
 396                                                 &info->marker);
 397                 info_last->marker = info->marker;
 398         }
 399
 400         session->append_all = FALSE;
 401         session->info_dirty = FALSE;
 402 }
 403
 404 static int session_notify(struct connman_session *session)
 405 {
 406         DBusMessage *msg;
 407         DBusMessageIter array, dict;
 408
 409         if (session->info_dirty == FALSE)
 410                 return 0;
 411
 412         DBG("session %p owner %s notify_path %s", session,
 413                 session->owner, session->notify_path);
 414
 415         msg = dbus_message_new_method_call(session->owner, session->notify_path,
 416                                                 CONNMAN_NOTIFICATION_INTERFACE,
 417                                                 "Update");
 418         if (msg == NULL)
 419                 return -ENOMEM;
 420
 421         dbus_message_iter_init_append(msg, &array);
 422         connman_dbus_dict_open(&array, &dict);
 423
 424         append_notify(&dict, session);
 425
 426         connman_dbus_dict_close(&array, &dict);
 427
 428         g_dbus_send_message(connection, msg);
 429
 430         session->info_dirty = FALSE;
 431
 432         return 0;
 433 }
 434
 435 static void ipconfig_ipv4_changed(struct connman_session *session)
 436 {
 437         struct session_info *info = &session->info;
 438
 439         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 440                                                 "IPv4", append_ipconfig_ipv4,
 441                                                 info->service);
 442 }
 443
 444 static void ipconfig_ipv6_changed(struct connman_session *session)
 445 {
 446         struct session_info *info = &session->info;
 447
 448         connman_dbus_setting_changed_dict(session->owner, session->notify_path,
 449                                                 "IPv6", append_ipconfig_ipv6,
 450                                                 info->service);
 451 }
 452
 453 static GSequenceIter *lookup_service(struct connman_session *session,
 454                                         struct connman_service *service)
 455 {
 456         GSequenceIter *iter;
 457
 458         if (service == NULL)
 459                 return NULL;
 460
 461         iter = g_sequence_get_begin_iter(session->service_list);
 462
 463         while (g_sequence_iter_is_end(iter) == FALSE) {
 464                 struct connman_service *service_iter = g_sequence_get(iter);
 465
 466                 if (service_iter == service)
 467                         return iter;
 468
 469                 iter = g_sequence_iter_next(iter);
 470         }
 471
 472         return NULL;
 473 }
 474
 475 static connman_bool_t service_type_match(struct connman_session *session,
 476                                         struct connman_service *service)
 477 {
 478         struct session_info *info = &session->info;
 479         GSList *list;
 480
 481         for (list = info->allowed_bearers;
 482                         list != NULL; list = list->next) {
 483                 struct bearer_info *info = list->data;
 484                 enum connman_service_type service_type;
 485
 486                 if (info->match_all == TRUE)
 487                         return TRUE;
 488
 489                 service_type = connman_service_get_type(service);
 490                 if (info->service_type == service_type)
 491                         return TRUE;
 492         }
 493
 494         return FALSE;
 495 }
 496
 497 static connman_bool_t service_match(struct connman_session *session,
 498                                         struct connman_service *service)
 499 {
 500         if (service_type_match(session, service) == FALSE)
 501                 return FALSE;
 502
 503         return TRUE;
 504 }
 505
 506 static int service_type_weight(enum connman_service_type type)
 507 {
 508         /*
 509          * The session doesn't care which service
 510          * to use. Nevertheless we have to sort them
 511          * according their type. The ordering is
 512          *
 513          * 1. Ethernet
 514          * 2. Bluetooth
 515          * 3. WiFi/WiMAX
 516          * 4. GSM/UTMS/3G
 517          */
 518
 519         switch (type) {
 520         case CONNMAN_SERVICE_TYPE_ETHERNET:
 521                 return 4;
 522         case CONNMAN_SERVICE_TYPE_BLUETOOTH:
 523                 return 3;
 524         case CONNMAN_SERVICE_TYPE_WIFI:
 525         case CONNMAN_SERVICE_TYPE_WIMAX:
 526                 return 2;
 527         case CONNMAN_SERVICE_TYPE_CELLULAR:
 528                 return 1;
 529         case CONNMAN_SERVICE_TYPE_UNKNOWN:
 530         case CONNMAN_SERVICE_TYPE_SYSTEM:
 531         case CONNMAN_SERVICE_TYPE_GPS:
 532         case CONNMAN_SERVICE_TYPE_VPN:
 533         case CONNMAN_SERVICE_TYPE_GADGET:
 534                 break;
 535         }
 536
 537         return 0;
 538 }
 539
 540 static gint sort_allowed_bearers(struct connman_service *service_a,
 541                                         struct connman_service *service_b,
 542                                         struct connman_session *session)
 543 {
 544         struct session_info *info = &session->info;
 545         GSList *list;
 546         enum connman_service_type type_a, type_b;
 547         int weight_a, weight_b;
 548
 549         type_a = connman_service_get_type(service_a);
 550         type_b = connman_service_get_type(service_b);
 551
 552         for (list = info->allowed_bearers;
 553                         list != NULL; list = list->next) {
 554                 struct bearer_info *info = list->data;
 555
 556                 if (info->match_all == TRUE) {
 557                         if (type_a != type_b) {
 558                                 weight_a = service_type_weight(type_a);
 559                                 weight_b = service_type_weight(type_b);
 560
 561                                 if (weight_a > weight_b)
 562                                         return -1;
 563
 564                                 if (weight_a < weight_b)
 565                                         return 1;
 566
 567                                 return 0;
 568                         }
 569                 }
 570
 571                 if (type_a == info->service_type &&
 572                                 type_b == info->service_type) {
 573                         return 0;
 574                 }
 575
 576                 if (type_a == info->service_type &&
 577                                 type_b != info->service_type) {
 578                         return -1;
 579                 }
 580
 581                 if (type_a != info->service_type &&
 582                                 type_b == info->service_type) {
 583                         return 1;
 584                 }
 585         }
 586
 587         return 0;
 588 }
 589
 590 static gint sort_services(gconstpointer a, gconstpointer b, gpointer user_data)
 591 {
 592         struct connman_service *service_a = (void *)a;
 593         struct connman_service *service_b = (void *)b;
 594         struct connman_session *session = user_data;
 595
 596         return sort_allowed_bearers(service_a, service_b, session);
 597 }
 598
 599 static void cleanup_session(gpointer user_data)
 600 {
 601         struct connman_session *session = user_data;
 602         struct session_info *info = &session->info;
 603
 604         DBG("remove %s", session->session_path);
 605
 606         g_sequence_free(session->service_list);
 607
 608         g_slist_foreach(info->allowed_bearers, cleanup_bearer_info, NULL);
 609         g_slist_free(info->allowed_bearers);
 610
 611         g_free(session->owner);
 612         g_free(session->session_path);
 613         g_free(session->notify_path);
 614
 615         g_free(session);
 616 }
 617
 618 static void release_session(gpointer key, gpointer value, gpointer user_data)
 619 {
 620         struct connman_session *session = value;
 621         DBusMessage *message;
 622
 623         DBG("owner %s path %s", session->owner, session->notify_path);
 624
 625         if (session->notify_watch > 0)
 626                 g_dbus_remove_watch(connection, session->notify_watch);
 627
 628         g_dbus_unregister_interface(connection, session->session_path,
 629                                                 CONNMAN_SESSION_INTERFACE);
 630
 631         message = dbus_message_new_method_call(session->owner,
 632                                                 session->notify_path,
 633                                                 CONNMAN_NOTIFICATION_INTERFACE,
 634                                                 "Release");
 635         if (message == NULL)
 636                 return;
 637
 638         dbus_message_set_no_reply(message, TRUE);
 639
 640         g_dbus_send_message(connection, message);
 641 }
 642
 643 static int session_disconnect(struct connman_session *session)
 644 {
 645         DBG("session %p, %s", session, session->owner);
 646
 647         if (session->notify_watch > 0)
 648                 g_dbus_remove_watch(connection, session->notify_watch);
 649
 650         g_dbus_unregister_interface(connection, session->session_path,
 651                                                 CONNMAN_SESSION_INTERFACE);
 652
 653         g_hash_table_remove(session_hash, session->session_path);
 654
 655         return 0;
 656 }
 657
 658 static void owner_disconnect(DBusConnection *conn, void *user_data)
 659 {
 660         struct connman_session *session = user_data;
 661
 662         DBG("session %p, %s died", session, session->owner);
 663
 664         session_disconnect(session);
 665 }
 666
 667 static DBusMessage *destroy_session(DBusConnection *conn,
 668                                         DBusMessage *msg, void *user_data)
 669 {
 670         struct connman_session *session = user_data;
 671
 672         DBG("session %p", session);
 673
 674         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 675 }
 676
 677 static void update_info(struct session_info *info)
 678 {
 679         enum connman_service_type type;
 680         int idx;
 681
 682         if (info->service != NULL) {
 683                 type = connman_service_get_type(info->service);
 684                 info->bearer = service2bearer(type);
 685
 686                 info->online = __connman_service_is_connected(info->service);
 687                 info->name = __connman_service_get_name(info->service);
 688
 689                 idx = __connman_service_get_index(info->service);
 690                 info->ifname = connman_inet_ifname(idx);
 691                 if (info->ifname == NULL)
 692                         info->ifname = "";
 693         } else {
 694                 info->bearer = "";
 695                 info->online = FALSE;
 696                 info->name = "";
 697                 info->ifname = "";
 698         }
 699 }
 700
 701 static void select_and_connect(struct connman_session *session,
 702                                 connman_bool_t do_connect)
 703 {
 704         struct session_info *info = &session->info;
 705         struct connman_service *service = NULL;
 706         GSequenceIter *iter;
 707
 708         DBG("session %p connect %d", session, do_connect);
 709
 710         iter = g_sequence_get_begin_iter(session->service_list);
 711
 712         while (g_sequence_iter_is_end(iter) == FALSE) {
 713                 service = g_sequence_get(iter);
 714
 715                 if (__connman_service_is_connecting(service) == TRUE ||
 716                                 __connman_service_is_connected(service) == TRUE) {
 717                         break;
 718                 }
 719
 720                 if (__connman_service_is_idle(service) == TRUE &&
 721                                 do_connect == TRUE) {
 722                         break;
 723                 }
 724
 725                 service = NULL;
 726
 727                 iter = g_sequence_iter_next(iter);
 728         }
 729
 730         if (info->service != NULL && info->service != service) {
 731                 __connman_service_disconnect(info->service);
 732                 info->service = NULL;
 733         }
 734
 735         if (service != NULL) {
 736                 info->service = service;
 737
 738                 if (do_connect == TRUE)
 739                         __connman_service_connect(info->service);
 740         }
 741 }
 742
 743 static void session_changed(struct connman_session *session)
 744 {
 745         struct session_info *info = &session->info;
 746         struct session_info *info_last = &session->info_last;
 747
 748         /*
 749          * TODO: This only a placeholder for the 'real' algorithm to
 750          * play a bit around. So we are going to improve it step by step.
 751          */
 752
 753         if (info->ecall == TRUE && session != ecall_session)
 754                 goto out;
 755
 756         if (info->connect == FALSE) {
 757                 if (info->service != NULL)
 758                         __connman_service_disconnect(info->service);
 759                 info->service = NULL;
 760         } else {
 761                 select_and_connect(session, TRUE);
 762         }
 763
 764 out:
 765         if (info->service != info_last->service) {
 766                 update_info(info);
 767                 session->info_dirty = TRUE;
 768         }
 769 }
 770
 771 static gboolean session_cb(gpointer user_data)
 772 {
 773         struct connman_session *session = user_data;
 774
 775         session_changed(session);
 776         session_notify(session);
 777
 778         return FALSE;
 779 }
 780
 781 static DBusMessage *connect_session(DBusConnection *conn,
 782                                         DBusMessage *msg, void *user_data)
 783 {
 784         struct connman_session *session = user_data;
 785         struct session_info *info = &session->info;
 786
 787         DBG("session %p", session);
 788
 789         info->connect = TRUE;
 790
 791         if (ecall_session != NULL && ecall_session != session)
 792                 return __connman_error_failed(msg, EBUSY);
 793
 794         session->info_dirty = TRUE;
 795
 796         g_timeout_add_seconds(0, session_cb, session);
 797
 798         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 799 }
 800
 801 static DBusMessage *disconnect_session(DBusConnection *conn,
 802                                         DBusMessage *msg, void *user_data)
 803 {
 804         struct connman_session *session = user_data;
 805         struct session_info *info = &session->info;
 806
 807         DBG("session %p", session);
 808
 809         info->connect = FALSE;
 810
 811         if (ecall_session != NULL && ecall_session != session)
 812                 return __connman_error_failed(msg, EBUSY);
 813
 814         session->info_dirty = TRUE;
 815
 816         g_timeout_add_seconds(0, session_cb, session);
 817
 818         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 819 }
 820
 821 static void print_name(gpointer data, gpointer user_data)
 822 {
 823         struct connman_service *service = data;
 824
 825         DBG("service %p type %s name %s", service,
 826                 service2bearer(connman_service_get_type(service)),
 827                 __connman_service_get_name(service));
 828 }
 829
 830 static void update_allowed_bearers(struct connman_session *session)
 831 {
 832         if (session->service_list != NULL)
 833                 g_sequence_free(session->service_list);
 834
 835         session->service_list = __connman_service_get_list(session,
 836                                                                 service_match);
 837         g_sequence_sort(session->service_list, sort_services, session);
 838         g_sequence_foreach(session->service_list, print_name, NULL);
 839
 840         session->info_dirty = TRUE;
 841 }
 842
 843 static void update_ecall_sessions(struct connman_session *session)
 844 {
 845         struct session_info *info = &session->info;
 846         struct connman_session *session_iter;
 847         GHashTableIter iter;
 848         gpointer key, value;
 849
 850         g_hash_table_iter_init(&iter, session_hash);
 851
 852         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 853                 session_iter = value;
 854
 855                 if (session_iter == session)
 856                         continue;
 857
 858                 session_iter->info.ecall = info->ecall;
 859                 session_iter->info_dirty = TRUE;
 860
 861                 g_timeout_add_seconds(0, session_cb, session_iter);
 862         }
 863 }
 864
 865 static void update_ecall(struct connman_session *session)
 866 {
 867         struct session_info *info = &session->info;
 868         struct session_info *info_last = &session->info_last;
 869
 870         DBG("ecall_session %p ecall %d -> %d", ecall_session,
 871                 info_last->ecall, info->ecall);
 872
 873         if (ecall_session == NULL) {
 874                 if (!(info_last->ecall == FALSE && info->ecall == TRUE))
 875                         goto err;
 876
 877                 ecall_session = session;
 878         } else if (ecall_session == session) {
 879                 if (!(info_last->ecall == TRUE && info->ecall == FALSE))
 880                         goto err;
 881
 882                 ecall_session = NULL;
 883         } else {
 884                 goto err;
 885         }
 886
 887         update_ecall_sessions(session);
 888
 889         session->info_dirty = TRUE;
 890         return;
 891
 892 err:
 893         /* not a valid transition */
 894         info->ecall = info_last->ecall;
 895 }
 896
 897 static DBusMessage *change_session(DBusConnection *conn,
 898                                         DBusMessage *msg, void *user_data)
 899 {
 900         struct connman_session *session = user_data;
 901         struct session_info *info = &session->info;
 902         struct session_info *info_last = &session->info_last;
 903         DBusMessageIter iter, value;
 904         const char *name;
 905         GSList *allowed_bearers;
 906
 907         DBG("session %p", session);
 908         if (dbus_message_iter_init(msg, &iter) == FALSE)
 909                 return __connman_error_invalid_arguments(msg);
 910
 911         dbus_message_iter_get_basic(&iter, &name);
 912         dbus_message_iter_next(&iter);
 913         dbus_message_iter_recurse(&iter, &value);
 914
 915         switch (dbus_message_iter_get_arg_type(&value)) {
 916         case DBUS_TYPE_ARRAY:
 917                 if (g_str_equal(name, "AllowedBearers") == TRUE) {
 918                         allowed_bearers = session_parse_allowed_bearers(&value);
 919
 920                         g_slist_foreach(info->allowed_bearers,
 921                                         cleanup_bearer_info, NULL);
 922                         g_slist_free(info->allowed_bearers);
 923
 924                         if (allowed_bearers == NULL) {
 925                                 allowed_bearers = session_allowed_bearers_any();
 926
 927                                 if (allowed_bearers == NULL)
 928                                         return __connman_error_failed(msg, ENOMEM);
 929                         }
 930
 931                         info->allowed_bearers = allowed_bearers;
 932
 933                         update_allowed_bearers(session);
 934                 } else {
 935                         goto err;
 936                 }
 937                 break;
 938         case DBUS_TYPE_BOOLEAN:
 939                 if (g_str_equal(name, "Priority") == TRUE) {
 940                         dbus_message_iter_get_basic(&value,
 941                                         &info->priority);
 942
 943                         if (info_last->priority != info->priority)
 944                                 session->info_dirty = TRUE;
 945                 } else if (g_str_equal(name, "AvoidHandover") == TRUE) {
 946                         dbus_message_iter_get_basic(&value,
 947                                         &info->avoid_handover);
 948
 949                         if (info_last->avoid_handover != info->avoid_handover)
 950                                 session->info_dirty = TRUE;
 951                         } else if (g_str_equal(name, "StayConnected") == TRUE) {
 952                         dbus_message_iter_get_basic(&value,
 953                                         &info->stay_connected);
 954
 955                         if (info_last->stay_connected != info->stay_connected)
 956                                 session->info_dirty = TRUE;
 957                 } else if (g_str_equal(name, "EmergencyCall") == TRUE) {
 958                         dbus_message_iter_get_basic(&value,
 959                                         &info->ecall);
 960
 961                         update_ecall(session);
 962                 } else {
 963                         goto err;
 964                 }
 965                 break;
 966         case DBUS_TYPE_UINT32:
 967                 if (g_str_equal(name, "PeriodicConnect") == TRUE) {
 968                         dbus_message_iter_get_basic(&value,
 969                                         &info->periodic_connect);
 970
 971                         if (info_last->periodic_connect != info->periodic_connect)
 972                                 session->info_dirty = TRUE;
 973                 } else if (g_str_equal(name, "IdleTimeout") == TRUE) {
 974                         dbus_message_iter_get_basic(&value,
 975                                         &info->idle_timeout);
 976
 977                         if (info_last->idle_timeout != info->idle_timeout)
 978                                 session->info_dirty = TRUE;
 979                 } else {
 980                         goto err;
 981                 }
 982                 break;
 983         case DBUS_TYPE_STRING:
 984                 if (g_str_equal(name, "RoamingPolicy") == TRUE) {
 985                         const char *val;
 986                         dbus_message_iter_get_basic(&value, &val);
 987                         info->roaming_policy =
 988                                         string2roamingpolicy(val);
 989
 990                         if (info_last->roaming_policy != info->roaming_policy)
 991                                 session->info_dirty = TRUE;
 992                 } else {
 993                         goto err;
 994                 }
 995                 break;
 996         default:
 997                 goto err;
 998         }
 999
1000         if (session->info_dirty == TRUE)
1001                 session_cb(session);
1002
1003         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
1004
1005 err:
1006         return __connman_error_invalid_arguments(msg);
1007 }
1008
1009 static GDBusMethodTable session_methods[] = {
1010         { "Destroy",    "",   "", destroy_session    },
1011         { "Connect",    "",   "", connect_session    },
1012         { "Disconnect", "",   "", disconnect_session },
1013         { "Change",     "sv", "", change_session     },
1014         { },
1015 };
1016
1017 int __connman_session_create(DBusMessage *msg)
1018 {
1019         const char *owner, *notify_path;
1020         char *session_path = NULL;
1021         DBusMessageIter iter, array;
1022         struct connman_session *session;
1023         struct session_info *info, *info_last;
1024
1025         connman_bool_t priority = FALSE, avoid_handover = FALSE;
1026         connman_bool_t stay_connected = FALSE, ecall = FALSE;
1027         enum connman_session_roaming_policy roaming_policy =
1028                                 CONNMAN_SESSION_ROAMING_POLICY_FORBIDDEN;
1029         GSList *allowed_bearers = NULL;
1030         unsigned int periodic_connect = 0;
1031         unsigned int idle_timeout = 0;
1032
1033         int err;
1034
1035         owner = dbus_message_get_sender(msg);
1036
1037         DBG("owner %s", owner);
1038
1039         if (ecall_session != NULL) {
1040                 /*
1041                  * If there is an emergency call already going on,
1042                  * ignore session creation attempt
1043                  */
1044                 err = -EBUSY;
1045                 goto err;
1046         }
1047
1048         dbus_message_iter_init(msg, &iter);
1049         dbus_message_iter_recurse(&iter, &array);
1050
1051         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1052                 DBusMessageIter entry, value;
1053                 const char *key, *val;
1054
1055                 dbus_message_iter_recurse(&array, &entry);
1056                 dbus_message_iter_get_basic(&entry, &key);
1057
1058                 dbus_message_iter_next(&entry);
1059                 dbus_message_iter_recurse(&entry, &value);
1060
1061                 switch (dbus_message_iter_get_arg_type(&value)) {
1062                 case DBUS_TYPE_ARRAY:
1063                         if (g_str_equal(key, "AllowedBearers") == TRUE) {
1064                                 allowed_bearers =
1065                                         session_parse_allowed_bearers(&value);
1066                         } else {
1067                                 return -EINVAL;
1068                         }
1069                         break;
1070                 case DBUS_TYPE_BOOLEAN:
1071                         if (g_str_equal(key, "Priority") == TRUE) {
1072                                 dbus_message_iter_get_basic(&value,
1073                                                         &priority);
1074                         } else if (g_str_equal(key, "AvoidHandover") == TRUE) {
1075                                 dbus_message_iter_get_basic(&value,
1076                                                         &avoid_handover);
1077                         } else if (g_str_equal(key, "StayConnected") == TRUE) {
1078                                 dbus_message_iter_get_basic(&value,
1079                                                         &stay_connected);
1080                         } else if (g_str_equal(key, "EmergencyCall") == TRUE) {
1081                                 dbus_message_iter_get_basic(&value,
1082                                                         &ecall);
1083                         } else {
1084                                 return -EINVAL;
1085                         }
1086                         break;
1087                 case DBUS_TYPE_UINT32:
1088                         if (g_str_equal(key, "PeriodicConnect") == TRUE) {
1089                                 dbus_message_iter_get_basic(&value,
1090                                                         &periodic_connect);
1091                         } else if (g_str_equal(key, "IdleTimeout") == TRUE) {
1092                                 dbus_message_iter_get_basic(&value,
1093                                                         &idle_timeout);
1094                         } else {
1095                                 return -EINVAL;
1096                         }
1097                         break;
1098                 case DBUS_TYPE_STRING:
1099                         if (g_str_equal(key, "RoamingPolicy") == TRUE) {
1100                                 dbus_message_iter_get_basic(&value, &val);
1101                                 roaming_policy = string2roamingpolicy(val);
1102                         } else {
1103                                 return -EINVAL;
1104                         }
1105                 }
1106                 dbus_message_iter_next(&array);
1107         }
1108
1109         dbus_message_iter_next(&iter);
1110         dbus_message_iter_get_basic(&iter, &notify_path);
1111
1112         if (notify_path == NULL) {
1113                 err = -EINVAL;
1114                 goto err;
1115         }
1116
1117         session_path = g_strdup_printf("/sessions%s", notify_path);
1118         if (session_path == NULL) {
1119                 err = -ENOMEM;
1120                 goto err;
1121         }
1122
1123         session = g_hash_table_lookup(session_hash, session_path);
1124         if (session != NULL) {
1125                 err = -EEXIST;
1126                 goto err;
1127         }
1128
1129         session = g_try_new0(struct connman_session, 1);
1130         if (session == NULL) {
1131                 err = -ENOMEM;
1132                 goto err;
1133         }
1134
1135         info = &session->info;
1136         info_last = &session->info_last;
1137
1138         session->owner = g_strdup(owner);
1139         session->session_path = session_path;
1140         session->notify_path = g_strdup(notify_path);
1141         session->notify_watch =
1142                 g_dbus_add_disconnect_watch(connection, session->owner,
1143                                         owner_disconnect, session, NULL);
1144
1145         info->bearer = "";
1146         info->online = FALSE;
1147         info->priority = priority;
1148         info->avoid_handover = avoid_handover;
1149         info->stay_connected = stay_connected;
1150         info->periodic_connect = periodic_connect;
1151         info->idle_timeout = idle_timeout;
1152         info->ecall = ecall;
1153         info->roaming_policy = roaming_policy;
1154         info->service = NULL;
1155         info->marker = 0;
1156
1157         if (allowed_bearers == NULL) {
1158                 info->allowed_bearers =
1159                                 session_allowed_bearers_any();
1160
1161                 if (info->allowed_bearers == NULL) {
1162                         err = -ENOMEM;
1163                         goto err;
1164                 }
1165         } else {
1166                 info->allowed_bearers = allowed_bearers;
1167         }
1168
1169         g_hash_table_replace(session_hash, session->session_path, session);
1170
1171         DBG("add %s", session->session_path);
1172
1173         if (g_dbus_register_interface(connection, session->session_path,
1174                                         CONNMAN_SESSION_INTERFACE,
1175                                         session_methods, NULL,
1176                                         NULL, session, NULL) == FALSE) {
1177                 connman_error("Failed to register %s", session->session_path);
1178                 g_hash_table_remove(session_hash, session->session_path);
1179                 session = NULL;
1180
1181                 err = -EINVAL;
1182                 goto err;
1183         }
1184
1185         g_dbus_send_reply(connection, msg,
1186                                 DBUS_TYPE_OBJECT_PATH, &session->session_path,
1187                                 DBUS_TYPE_INVALID);
1188
1189
1190         update_allowed_bearers(session);
1191         update_info(info);
1192         if (info->ecall == TRUE) {
1193                 ecall_session = session;
1194                 update_ecall_sessions(session);
1195         }
1196
1197         info_last->bearer = info->bearer;
1198         info_last->online = info->online;
1199         info_last->priority = info->priority;
1200         info_last->avoid_handover = info->avoid_handover;
1201         info_last->stay_connected = info->stay_connected;
1202         info_last->periodic_connect = info->periodic_connect;
1203         info_last->idle_timeout = info->idle_timeout;
1204         info_last->ecall = info->ecall;
1205         info_last->roaming_policy = info->roaming_policy;
1206         info_last->service = info->service;
1207         info_last->marker = info->marker;
1208         info_last->allowed_bearers = info->allowed_bearers;
1209         update_info(info_last);
1210
1211         session->info_dirty = TRUE;
1212         session->append_all = TRUE;
1213
1214         g_timeout_add_seconds(0, session_cb, session);
1215
1216         return 0;
1217
1218 err:
1219         connman_error("Failed to create session");
1220         g_free(session_path);
1221
1222         g_slist_foreach(allowed_bearers, cleanup_bearer_info, NULL);
1223         g_slist_free(allowed_bearers);
1224
1225         return err;
1226 }
1227
1228 int __connman_session_destroy(DBusMessage *msg)
1229 {
1230         const char *owner, *session_path;
1231         struct connman_session *session;
1232
1233         owner = dbus_message_get_sender(msg);
1234
1235         DBG("owner %s", owner);
1236
1237         dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &session_path,
1238                                                         DBUS_TYPE_INVALID);
1239         if (session_path == NULL)
1240                 return -EINVAL;
1241
1242         session = g_hash_table_lookup(session_hash, session_path);
1243         if (session == NULL)
1244                 return -EINVAL;
1245
1246         if (g_strcmp0(owner, session->owner) != 0)
1247                 return -EACCES;
1248
1249         session_disconnect(session);
1250
1251         return 0;
1252 }
1253
1254 connman_bool_t __connman_session_mode()
1255 {
1256         return sessionmode;
1257 }
1258
1259 void __connman_session_set_mode(connman_bool_t enable)
1260 {
1261         DBG("enable %d", enable);
1262
1263         if (sessionmode == enable)
1264                 return;
1265
1266         sessionmode = enable;
1267
1268         if (sessionmode == TRUE)
1269                 __connman_service_disconnect_all();
1270 }
1271
1272 static void service_add(struct connman_service *service)
1273 {
1274         GHashTableIter iter;
1275         gpointer key, value;
1276         struct connman_session *session;
1277
1278         DBG("service %p", service);
1279
1280         g_hash_table_iter_init(&iter, session_hash);
1281
1282         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1283                 session = value;
1284
1285                 if (service_match(session, service) == FALSE)
1286                         continue;
1287
1288                 g_sequence_insert_sorted(session->service_list, service,
1289                                                 sort_services, session);
1290
1291                 session_cb(session);
1292         }
1293 }
1294
1295 static int service_remove_from_session(struct connman_session *session,
1296                                         struct connman_service *service)
1297 {
1298
1299         GSequenceIter *iter;
1300
1301         iter = lookup_service(session, service);
1302         if (iter == NULL)
1303                 return -ENOENT;
1304
1305         session->info.online = FALSE;
1306         g_sequence_remove(iter);
1307
1308         return 0;
1309 }
1310
1311 static void service_remove(struct connman_service *service)
1312 {
1313
1314         GHashTableIter iter;
1315         gpointer key, value;
1316         struct connman_session *session;
1317         struct session_info *info;
1318
1319         DBG("service %p", service);
1320
1321         g_hash_table_iter_init(&iter, session_hash);
1322
1323         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1324                 session = value;
1325                 info = &session->info;
1326
1327                 if (service_remove_from_session(session, service) != 0)
1328                         continue;
1329
1330                 info->service = NULL;
1331                 session_cb(session);
1332         }
1333 }
1334
1335 static void service_state_changed(struct connman_service *service,
1336                                         enum connman_service_state state)
1337 {
1338         GHashTableIter iter;
1339         gpointer key, value;
1340         struct connman_session *session;
1341         struct session_info *info;
1342         connman_bool_t online;
1343
1344         DBG("service %p state %d", service, state);
1345
1346         g_hash_table_iter_init(&iter, session_hash);
1347
1348         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1349                 session = value;
1350                 info = &session->info;
1351
1352                 if (info->service == service) {
1353                         online = __connman_service_is_connected(service);
1354                         if (info->online == online)
1355                                 continue;
1356
1357                         info->online = online;
1358                         session->info_dirty = TRUE;
1359                         session_cb(session);
1360                 }
1361         }
1362 }
1363
1364 static void ipconfig_changed(struct connman_service *service,
1365                                 struct connman_ipconfig *ipconfig)
1366 {
1367         GHashTableIter iter;
1368         gpointer key, value;
1369         struct connman_session *session;
1370         struct session_info *info;
1371         enum connman_ipconfig_type type;
1372
1373         DBG("service %p ipconfig %p", service, ipconfig);
1374
1375         type = __connman_ipconfig_get_config_type(ipconfig);
1376
1377         g_hash_table_iter_init(&iter, session_hash);
1378
1379         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
1380                 session = value;
1381                 info = &session->info;
1382
1383                 if (info->service == service) {
1384                         if (type == CONNMAN_IPCONFIG_TYPE_IPV4)
1385                                 ipconfig_ipv4_changed(session);
1386                         else if (type == CONNMAN_IPCONFIG_TYPE_IPV6)
1387                                 ipconfig_ipv6_changed(session);
1388                 }
1389         }
1390 }
1391
1392 static struct connman_notifier session_notifier = {
1393         .name                   = "session",
1394         .service_add            = service_add,
1395         .service_remove         = service_remove,
1396         .service_state_changed  = service_state_changed,
1397         .ipconfig_changed       = ipconfig_changed,
1398 };
1399
1400 int __connman_session_init(void)
1401 {
1402         int err;
1403
1404         DBG("");
1405
1406         connection = connman_dbus_get_connection();
1407         if (connection == NULL)
1408                 return -1;
1409
1410         err = connman_notifier_register(&session_notifier);
1411         if (err < 0) {
1412                 dbus_connection_unref(connection);
1413                 return err;
1414         }
1415
1416         session_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
1417                                                 NULL, cleanup_session);
1418
1419         sessionmode = FALSE;
1420         return 0;
1421 }
1422
1423 void __connman_session_cleanup(void)
1424 {
1425         DBG("");
1426
1427         if (connection == NULL)
1428                 return;
1429
1430         connman_notifier_unregister(&session_notifier);
1431
1432         g_hash_table_foreach(session_hash, release_session, NULL);
1433         g_hash_table_destroy(session_hash);
1434
1435         dbus_connection_unref(connection);
1436 }