vcs.maemo.org Git - connman/blob - plugins/supplicant.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <errno.h>
  28 #include <unistd.h>
  29 #include <stdlib.h>
  30 #include <signal.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/socket.h>
  33 #include <sys/un.h>
  34 #include <net/if.h>
  35
  36 #include <dbus/dbus.h>
  37 #include <gdbus.h>
  38
  39 #include <connman/log.h>
  40
  41 #include "supplicant.h"
  42
  43 enum supplicant_state {
  44         STATE_INACTIVE,
  45         STATE_SCANNING,
  46         STATE_ASSOCIATING,
  47         STATE_ASSOCIATED,
  48         STATE_4WAY_HANDSHAKE,
  49         STATE_GROUP_HANDSHAKE,
  50         STATE_COMPLETED,
  51         STATE_DISCONNECTED,
  52 };
  53
  54 // COMPLETED       ==> ASSOCIATING
  55 // ASSOCIATED      ==> DISCONNECTED
  56 // DISCONNECTED    ==> INACTIVE
  57
  58 // DISCONNECTED    ==> SCANNING
  59 // SCANNING        ==> ASSOCIATED
  60
  61 // ASSOCIATING     ==> ASSOCIATED
  62 // ASSOCIATED      ==> 4WAY_HANDSHAKE
  63 // 4WAY_HANDSHAKE  ==> GROUP_HANDSHAKE
  64 // GROUP_HANDSHAKE ==> COMPLETED
  65
  66 struct supplicant_task {
  67         DBusConnection *conn;
  68         int ifindex;
  69         gchar *ifname;
  70         struct connman_iface *iface;
  71         gchar *path;
  72         gboolean created;
  73         gchar *network;
  74         enum supplicant_state state;
  75 };
  76
  77 static GSList *tasks = NULL;
  78
  79 struct supplicant_ap {
  80         gchar *identifier;
  81         GByteArray *ssid;
  82         guint capabilities;
  83         gboolean has_wep;
  84         gboolean has_wpa;
  85         gboolean has_rsn;
  86 };
  87
  88 #define IEEE80211_CAP_ESS       0x0001
  89 #define IEEE80211_CAP_IBSS      0x0002
  90 #define IEEE80211_CAP_PRIVACY   0x0010
  91
  92 static struct supplicant_task *find_task(int ifindex)
  93 {
  94         GSList *list;
  95
  96         for (list = tasks; list; list = list->next) {
  97                 struct supplicant_task *task = list->data;
  98
  99                 if (task->ifindex == ifindex)
 100                         return task;
 101         }
 102
 103         return NULL;
 104 }
 105
 106 static int get_interface(struct supplicant_task *task)
 107 {
 108         DBusMessage *message, *reply;
 109         DBusError error;
 110         const char *path;
 111
 112         DBG("task %p", task);
 113
 114         message = dbus_message_new_method_call(SUPPLICANT_NAME, SUPPLICANT_PATH,
 115                                         SUPPLICANT_INTF, "getInterface");
 116         if (message == NULL)
 117                 return -ENOMEM;
 118
 119         dbus_message_append_args(message, DBUS_TYPE_STRING, &task->ifname,
 120                                                         DBUS_TYPE_INVALID);
 121
 122         dbus_error_init(&error);
 123
 124         reply = dbus_connection_send_with_reply_and_block(task->conn,
 125                                                         message, -1, &error);
 126         if (reply == NULL) {
 127                 if (dbus_error_is_set(&error) == TRUE) {
 128                         connman_error("%s", error.message);
 129                         dbus_error_free(&error);
 130                 } else
 131                         connman_error("Failed to get interface");
 132                 dbus_message_unref(message);
 133                 return -EIO;
 134         }
 135
 136         dbus_message_unref(message);
 137
 138         dbus_error_init(&error);
 139
 140         if (dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path,
 141                                                 DBUS_TYPE_INVALID) == FALSE) {
 142                 if (dbus_error_is_set(&error) == TRUE) {
 143                         connman_error("%s", error.message);
 144                         dbus_error_free(&error);
 145                 } else
 146                         connman_error("Wrong arguments for interface");
 147                 dbus_message_unref(reply);
 148                 return -EIO;
 149         }
 150
 151         DBG("path %s", path);
 152
 153         task->path = g_strdup(path);
 154         task->created = FALSE;
 155
 156         dbus_message_unref(reply);
 157
 158         return 0;
 159 }
 160
 161 static int add_interface(struct supplicant_task *task)
 162 {
 163         DBusMessage *message, *reply;
 164         DBusError error;
 165         const char *path;
 166
 167         DBG("task %p", task);
 168
 169         message = dbus_message_new_method_call(SUPPLICANT_NAME, SUPPLICANT_PATH,
 170                                         SUPPLICANT_INTF, "addInterface");
 171         if (message == NULL)
 172                 return -ENOMEM;
 173
 174         dbus_error_init(&error);
 175
 176         dbus_message_append_args(message, DBUS_TYPE_STRING, &task->ifname,
 177                                                         DBUS_TYPE_INVALID);
 178
 179         reply = dbus_connection_send_with_reply_and_block(task->conn,
 180                                                         message, -1, &error);
 181         if (reply == NULL) {
 182                 if (dbus_error_is_set(&error) == TRUE) {
 183                         connman_error("%s", error.message);
 184                         dbus_error_free(&error);
 185                 } else
 186                         connman_error("Failed to add interface");
 187                 dbus_message_unref(message);
 188                 return -EIO;
 189         }
 190
 191         dbus_message_unref(message);
 192
 193         dbus_error_init(&error);
 194
 195         if (dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path,
 196                                                 DBUS_TYPE_INVALID) == FALSE) {
 197                 if (dbus_error_is_set(&error) == TRUE) {
 198                         connman_error("%s", error.message);
 199                         dbus_error_free(&error);
 200                 } else
 201                         connman_error("Wrong arguments for interface");
 202                 dbus_message_unref(reply);
 203                 return -EIO;
 204         }
 205
 206         DBG("path %s", path);
 207
 208         task->path = g_strdup(path);
 209         task->created = TRUE;
 210
 211         dbus_message_unref(reply);
 212
 213         return 0;
 214 }
 215
 216 static int add_network(struct supplicant_task *task)
 217 {
 218         DBusMessage *message, *reply;
 219         DBusError error;
 220         const char *path;
 221
 222         DBG("task %p", task);
 223
 224         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->path,
 225                                 SUPPLICANT_INTF ".Interface", "addNetwork");
 226         if (message == NULL)
 227                 return -ENOMEM;
 228
 229         dbus_error_init(&error);
 230
 231         reply = dbus_connection_send_with_reply_and_block(task->conn,
 232                                                         message, -1, &error);
 233         if (reply == NULL) {
 234                 if (dbus_error_is_set(&error) == TRUE) {
 235                         connman_error("%s", error.message);
 236                         dbus_error_free(&error);
 237                 } else
 238                         connman_error("Failed to add network");
 239                 dbus_message_unref(message);
 240                 return -EIO;
 241         }
 242
 243         dbus_message_unref(message);
 244
 245         dbus_error_init(&error);
 246
 247         if (dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path,
 248                                                 DBUS_TYPE_INVALID) == FALSE) {
 249                 if (dbus_error_is_set(&error) == TRUE) {
 250                         connman_error("%s", error.message);
 251                         dbus_error_free(&error);
 252                 } else
 253                         connman_error("Wrong arguments for network");
 254                 dbus_message_unref(reply);
 255                 return -EIO;
 256         }
 257
 258         DBG("path %s", path);
 259
 260         task->network = g_strdup(path);
 261
 262         dbus_message_unref(reply);
 263
 264         return 0;
 265 }
 266
 267 static int remove_network(struct supplicant_task *task)
 268 {
 269         DBusMessage *message, *reply;
 270         DBusError error;
 271
 272         DBG("task %p", task);
 273
 274         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->path,
 275                                 SUPPLICANT_INTF ".Interface", "removeNetwork");
 276         if (message == NULL)
 277                 return -ENOMEM;
 278
 279         dbus_message_append_args(message, DBUS_TYPE_OBJECT_PATH, &task->network,
 280                                                         DBUS_TYPE_INVALID);
 281
 282         dbus_error_init(&error);
 283
 284         reply = dbus_connection_send_with_reply_and_block(task->conn,
 285                                                         message, -1, &error);
 286         if (reply == NULL) {
 287                 if (dbus_error_is_set(&error) == TRUE) {
 288                         connman_error("%s", error.message);
 289                         dbus_error_free(&error);
 290                 } else
 291                         connman_error("Failed to remove network");
 292                 dbus_message_unref(message);
 293                 return -EIO;
 294         }
 295
 296         dbus_message_unref(message);
 297
 298         dbus_message_unref(reply);
 299
 300         return 0;
 301 }
 302
 303 static int select_network(struct supplicant_task *task)
 304 {
 305         DBusMessage *message, *reply;
 306         DBusError error;
 307
 308         DBG("task %p", task);
 309
 310         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->path,
 311                                 SUPPLICANT_INTF ".Interface", "selectNetwork");
 312         if (message == NULL)
 313                 return -ENOMEM;
 314
 315         dbus_message_append_args(message, DBUS_TYPE_OBJECT_PATH, &task->network,
 316                                                         DBUS_TYPE_INVALID);
 317
 318         dbus_error_init(&error);
 319
 320         reply = dbus_connection_send_with_reply_and_block(task->conn,
 321                                                         message, -1, &error);
 322         if (reply == NULL) {
 323                 if (dbus_error_is_set(&error) == TRUE) {
 324                         connman_error("%s", error.message);
 325                         dbus_error_free(&error);
 326                 } else
 327                         connman_error("Failed to select network");
 328                 dbus_message_unref(message);
 329                 return -EIO;
 330         }
 331
 332         dbus_message_unref(message);
 333
 334         dbus_message_unref(reply);
 335
 336         return 0;
 337 }
 338
 339 static int enable_network(struct supplicant_task *task)
 340 {
 341         DBusMessage *message, *reply;
 342         DBusError error;
 343
 344         DBG("task %p", task);
 345
 346         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->network,
 347                                         SUPPLICANT_INTF ".Network", "enable");
 348         if (message == NULL)
 349                 return -ENOMEM;
 350
 351         dbus_error_init(&error);
 352
 353         reply = dbus_connection_send_with_reply_and_block(task->conn,
 354                                                         message, -1, &error);
 355         if (reply == NULL) {
 356                 if (dbus_error_is_set(&error) == TRUE) {
 357                         connman_error("%s", error.message);
 358                         dbus_error_free(&error);
 359                 } else
 360                         connman_error("Failed to enable network");
 361                 dbus_message_unref(message);
 362                 return -EIO;
 363         }
 364
 365         dbus_message_unref(message);
 366
 367         dbus_message_unref(reply);
 368
 369         return 0;
 370 }
 371
 372 static int disable_network(struct supplicant_task *task)
 373 {
 374         DBusMessage *message, *reply;
 375         DBusError error;
 376
 377         DBG("task %p", task);
 378
 379         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->network,
 380                                         SUPPLICANT_INTF ".Network", "disable");
 381         if (message == NULL)
 382                 return -ENOMEM;
 383
 384         dbus_error_init(&error);
 385
 386         reply = dbus_connection_send_with_reply_and_block(task->conn,
 387                                                         message, -1, &error);
 388         if (reply == NULL) {
 389                 if (dbus_error_is_set(&error) == TRUE) {
 390                         connman_error("%s", error.message);
 391                         dbus_error_free(&error);
 392                 } else
 393                         connman_error("Failed to disable network");
 394                 dbus_message_unref(message);
 395                 return -EIO;
 396         }
 397
 398         dbus_message_unref(message);
 399
 400         dbus_message_unref(reply);
 401
 402         return 0;
 403 }
 404
 405 static void append_entry(DBusMessageIter *dict,
 406                                 const char *key, int type, void *val)
 407 {
 408         DBusMessageIter entry, value;
 409         const char *signature;
 410
 411         dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY,
 412                                                                 NULL, &entry);
 413
 414         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
 415
 416         switch (type) {
 417         case DBUS_TYPE_STRING:
 418                 signature = DBUS_TYPE_STRING_AS_STRING;
 419                 break;
 420         case DBUS_TYPE_UINT16:
 421                 signature = DBUS_TYPE_UINT16_AS_STRING;
 422                 break;
 423         default:
 424                 signature = DBUS_TYPE_VARIANT_AS_STRING;
 425                 break;
 426         }
 427
 428         dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
 429                                                         signature, &value);
 430         dbus_message_iter_append_basic(&value, type, val);
 431         dbus_message_iter_close_container(&entry, &value);
 432
 433         dbus_message_iter_close_container(dict, &entry);
 434 }
 435
 436 static int set_network(struct supplicant_task *task, const char *network,
 437                                                 const char *passphrase)
 438 {
 439         DBusMessage *message, *reply;
 440         DBusMessageIter array, dict;
 441         DBusError error;
 442
 443         DBG("task %p", task);
 444
 445         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->network,
 446                                         SUPPLICANT_INTF ".Network", "set");
 447         if (message == NULL)
 448                 return -ENOMEM;
 449
 450         dbus_message_iter_init_append(message, &array);
 451
 452         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 453                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 454                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 455                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 456
 457         append_entry(&dict, "ssid", DBUS_TYPE_STRING, &network);
 458
 459         if (passphrase && strlen(passphrase) > 0) {
 460                 //exec_cmd(task, "SET_NETWORK 0 proto RSN WPA");
 461                 //exec_cmd(task, "SET_NETWORK 0 key_mgmt WPA-PSK");
 462
 463                 append_entry(&dict, "psk", DBUS_TYPE_STRING, &passphrase);
 464         } else {
 465                 //exec_cmd(task, "SET_NETWORK 0 proto RSN WPA");
 466                 //exec_cmd(task, "SET_NETWORK 0 key_mgmt NONE");
 467         }
 468
 469         dbus_message_iter_close_container(&array, &dict);
 470
 471         dbus_error_init(&error);
 472
 473         reply = dbus_connection_send_with_reply_and_block(task->conn,
 474                                                         message, -1, &error);
 475         if (reply == NULL) {
 476                 if (dbus_error_is_set(&error) == TRUE) {
 477                         connman_error("%s", error.message);
 478                         dbus_error_free(&error);
 479                 } else
 480                         connman_error("Failed to set network options");
 481                 dbus_message_unref(message);
 482                 return -EIO;
 483         }
 484
 485         dbus_message_unref(message);
 486
 487         dbus_message_unref(reply);
 488
 489         return 0;
 490 }
 491
 492 static int initiate_scan(struct supplicant_task *task)
 493 {
 494         DBusMessage *message, *reply;
 495         DBusError error;
 496
 497         DBG("task %p", task);
 498
 499         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->path,
 500                                         SUPPLICANT_INTF ".Interface", "scan");
 501         if (message == NULL)
 502                 return -ENOMEM;
 503
 504         dbus_error_init(&error);
 505
 506         reply = dbus_connection_send_with_reply_and_block(task->conn,
 507                                                         message, -1, &error);
 508         if (reply == NULL) {
 509                 if (dbus_error_is_set(&error) == TRUE) {
 510                         connman_error("%s", error.message);
 511                         dbus_error_free(&error);
 512                 } else
 513                         connman_error("Failed to initiate scan");
 514                 dbus_message_unref(message);
 515                 return -EIO;
 516         }
 517
 518         dbus_message_unref(message);
 519
 520         dbus_message_unref(reply);
 521
 522         return 0;
 523 }
 524
 525 static void extract_ssid(struct supplicant_ap *ap, DBusMessageIter *value)
 526 {
 527         DBusMessageIter array;
 528         unsigned char *ssid;
 529         int ssid_len;
 530
 531         dbus_message_iter_recurse(value, &array);
 532         dbus_message_iter_get_fixed_array(&array, &ssid, &ssid_len);
 533
 534         ap->identifier = g_strdup((char *) ssid);
 535 }
 536
 537 static void extract_wpaie(struct supplicant_ap *ap, DBusMessageIter *value)
 538 {
 539         DBusMessageIter array;
 540         unsigned char *ie;
 541         int ie_len;
 542
 543         dbus_message_iter_recurse(value, &array);
 544         dbus_message_iter_get_fixed_array(&array, &ie, &ie_len);
 545
 546         if (ie_len > 0)
 547                 ap->has_wpa = TRUE;
 548 }
 549
 550 static void extract_rsnie(struct supplicant_ap *ap, DBusMessageIter *value)
 551 {
 552         DBusMessageIter array;
 553         unsigned char *ie;
 554         int ie_len;
 555
 556         dbus_message_iter_recurse(value, &array);
 557         dbus_message_iter_get_fixed_array(&array, &ie, &ie_len);
 558
 559         if (ie_len > 0)
 560                 ap->has_rsn = TRUE;
 561 }
 562
 563 static void extract_capabilites(struct supplicant_ap *ap,
 564                                                 DBusMessageIter *value)
 565 {
 566         guint capabilities;
 567
 568         dbus_message_iter_get_basic(value, &capabilities);
 569
 570         ap->capabilities = capabilities;
 571
 572         if (capabilities & IEEE80211_CAP_PRIVACY)
 573                 ap->has_wep = TRUE;
 574 }
 575
 576 static int parse_network_properties(struct supplicant_task *task,
 577                                                         DBusMessage *message)
 578 {
 579         DBusMessageIter array, dict;
 580         struct supplicant_ap *ap;
 581         int security = 0;
 582
 583         DBG("task %p", task);
 584
 585         ap = g_try_new0(struct supplicant_ap, 1);
 586         if (ap == NULL)
 587                 return -ENOMEM;
 588
 589         dbus_message_iter_init(message, &array);
 590
 591         dbus_message_iter_recurse(&array, &dict);
 592
 593         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 594                 DBusMessageIter entry, value;
 595                 const char *key;
 596
 597                 dbus_message_iter_recurse(&dict, &entry);
 598                 dbus_message_iter_get_basic(&entry, &key);
 599
 600                 dbus_message_iter_next(&entry);
 601
 602                 dbus_message_iter_recurse(&entry, &value);
 603
 604                 //type = dbus_message_iter_get_arg_type(&value);
 605                 //dbus_message_iter_get_basic(&value, &val);
 606
 607                 if (g_str_equal(key, "ssid") == TRUE)
 608                         extract_ssid(ap, &value);
 609                 else if (g_str_equal(key, "wpaie") == TRUE)
 610                         extract_wpaie(ap, &value);
 611                 else if (g_str_equal(key, "rsnie") == TRUE)
 612                         extract_rsnie(ap, &value);
 613                 else if (g_str_equal(key, "capabilities") == TRUE)
 614                         extract_capabilites(ap, &value);
 615
 616                 dbus_message_iter_next(&dict);
 617         }
 618
 619         DBG("SSID %s", ap->identifier);
 620
 621         if (ap->has_wep)
 622                 security |= 0x01;
 623         if (ap->has_wpa)
 624                 security |= 0x02;
 625         if (ap->has_rsn)
 626                 security |= 0x04;
 627
 628         connman_iface_indicate_station(task->iface,
 629                                         ap->identifier, 25, security);
 630
 631         g_free(ap);
 632
 633         return 0;
 634 }
 635
 636 static int get_network_properties(struct supplicant_task *task,
 637                                                         const char *path)
 638 {
 639         DBusMessage *message, *reply;
 640         DBusError error;
 641
 642         DBG("task %p", task);
 643
 644         message = dbus_message_new_method_call(SUPPLICANT_NAME, path,
 645                                                 SUPPLICANT_INTF ".BSSID",
 646                                                                 "properties");
 647         if (message == NULL)
 648                 return -ENOMEM;
 649
 650         dbus_error_init(&error);
 651
 652         reply = dbus_connection_send_with_reply_and_block(task->conn,
 653                                                         message, -1, &error);
 654         if (reply == NULL) {
 655                 if (dbus_error_is_set(&error) == TRUE) {
 656                         connman_error("%s", error.message);
 657                         dbus_error_free(&error);
 658                 } else
 659                         connman_error("Failed to get network properties");
 660                 dbus_message_unref(message);
 661                 return -EIO;
 662         }
 663
 664         dbus_message_unref(message);
 665
 666         parse_network_properties(task, reply);
 667
 668         dbus_message_unref(reply);
 669
 670         return 0;
 671 }
 672
 673 static int scan_results_available(struct supplicant_task *task)
 674 {
 675         DBusMessage *message, *reply;
 676         DBusError error;
 677         char **results;
 678         int i, num_results;
 679
 680         DBG("task %p", task);
 681
 682         message = dbus_message_new_method_call(SUPPLICANT_NAME, task->path,
 683                                                 SUPPLICANT_INTF ".Interface",
 684                                                         "scanResults");
 685         if (message == NULL)
 686                 return -ENOMEM;
 687
 688         dbus_error_init(&error);
 689
 690         reply = dbus_connection_send_with_reply_and_block(task->conn,
 691                                                         message, -1, &error);
 692         if (reply == NULL) {
 693                 if (dbus_error_is_set(&error) == TRUE) {
 694                         connman_error("%s", error.message);
 695                         dbus_error_free(&error);
 696                 } else
 697                         connman_error("Failed to request scan result");
 698                 dbus_message_unref(message);
 699                 return -EIO;
 700         }
 701
 702         dbus_message_unref(message);
 703
 704         dbus_error_init(&error);
 705
 706         if (dbus_message_get_args(reply, &error,
 707                                 DBUS_TYPE_ARRAY, DBUS_TYPE_OBJECT_PATH,
 708                                                 &results, &num_results,
 709                                                 DBUS_TYPE_INVALID) == FALSE) {
 710                 if (dbus_error_is_set(&error) == TRUE) {
 711                         connman_error("%s", error.message);
 712                         dbus_error_free(&error);
 713                 } else
 714                         connman_error("Wrong arguments for scan result");
 715                 dbus_message_unref(reply);
 716                 return -EIO;
 717         }
 718
 719         for (i = 0; i < num_results; i++)
 720                 get_network_properties(task, results[i]);
 721
 722         g_strfreev(results);
 723
 724         dbus_message_unref(reply);
 725
 726         return 0;
 727 }
 728
 729 static void state_change(struct supplicant_task *task, DBusMessage *msg)
 730 {
 731         DBusError error;
 732         const char *state, *previous;
 733
 734         dbus_error_init(&error);
 735
 736         if (dbus_message_get_args(msg, &error, DBUS_TYPE_STRING, &state,
 737                                                 DBUS_TYPE_STRING, &previous,
 738                                                 DBUS_TYPE_INVALID) == FALSE) {
 739                 if (dbus_error_is_set(&error) == TRUE) {
 740                         connman_error("%s", error.message);
 741                         dbus_error_free(&error);
 742                 } else
 743                         connman_error("Wrong arguments for state change");
 744                 return;
 745         }
 746
 747         DBG("state %s ==> %s", previous, state);
 748
 749         if (g_str_equal(state, "INACTIVE") == TRUE)
 750                 task->state = STATE_INACTIVE;
 751         else if (g_str_equal(state, "SCANNING") == TRUE)
 752                 task->state = STATE_SCANNING;
 753         else if (g_str_equal(state, "ASSOCIATING") == TRUE)
 754                 task->state = STATE_ASSOCIATING;
 755         else if (g_str_equal(state, "ASSOCIATED") == TRUE)
 756                 task->state = STATE_ASSOCIATED;
 757         else if (g_str_equal(state, "GROUP_HANDSHAKE") == TRUE)
 758                 task->state = STATE_4WAY_HANDSHAKE;
 759         else if (g_str_equal(state, "4WAY_HANDSHAKE") == TRUE)
 760                 task->state = STATE_4WAY_HANDSHAKE;
 761         else if (g_str_equal(state, "COMPLETED") == TRUE)
 762                 task->state = STATE_COMPLETED;
 763         else if (g_str_equal(state, "DISCONNECTED") == TRUE)
 764                 task->state = STATE_DISCONNECTED;
 765 }
 766
 767 static DBusHandlerResult supplicant_filter(DBusConnection *conn,
 768                                                 DBusMessage *msg, void *data)
 769 {
 770         struct supplicant_task *task = data;
 771         const char *member;
 772
 773         if (dbus_message_has_interface(msg,
 774                                 SUPPLICANT_INTF ".Interface") == FALSE)
 775                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 776
 777         member = dbus_message_get_member(msg);
 778         if (member == NULL)
 779                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 780
 781         DBG("task %p member %s", task, member);
 782
 783         if (g_str_equal(member, "ScanResultsAvailable") == TRUE)
 784                 scan_results_available(task);
 785         else if (g_str_equal(member, "StateChange") == TRUE)
 786                 state_change(task, msg);
 787
 788         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 789 }
 790
 791 static int add_filter(struct supplicant_task *task)
 792 {
 793         DBusError error;
 794         gchar *filter;
 795
 796         if (dbus_connection_add_filter(task->conn,
 797                                 supplicant_filter, task, NULL) == FALSE)
 798                 return -EIO;
 799
 800         filter = g_strdup_printf("type=signal,interface=%s.Interface,path=%s",
 801                                                 SUPPLICANT_INTF, task->path);
 802
 803         DBG("filter %s", filter);
 804
 805         dbus_error_init(&error);
 806
 807         dbus_bus_add_match(task->conn, filter, &error);
 808
 809         g_free(filter);
 810
 811         if (dbus_error_is_set(&error) == TRUE) {
 812                 connman_error("Can't add match: %s", error.message);
 813                 dbus_error_free(&error);
 814         }
 815
 816         return 0;
 817 }
 818
 819 int __supplicant_start(struct connman_iface *iface)
 820 {
 821         struct ifreq ifr;
 822         struct supplicant_task *task;
 823         int sk, err;
 824
 825         sk = socket(PF_INET, SOCK_DGRAM, 0);
 826         if (sk < 0)
 827                 return -EIO;
 828
 829         memset(&ifr, 0, sizeof(ifr));
 830         ifr.ifr_ifindex = iface->index;
 831
 832         err = ioctl(sk, SIOCGIFNAME, &ifr);
 833
 834         close(sk);
 835
 836         if (err < 0)
 837                 return -EIO;
 838
 839         DBG("interface %s", ifr.ifr_name);
 840
 841         task = g_try_new0(struct supplicant_task, 1);
 842         if (task == NULL)
 843                 return -ENOMEM;
 844
 845         task->ifindex = iface->index;
 846         task->ifname = g_strdup(ifr.ifr_name);
 847         task->iface = iface;
 848
 849         if (task->ifname == NULL) {
 850                 g_free(task);
 851                 return -ENOMEM;
 852         }
 853
 854         task->conn = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 855         if (task->conn == NULL) {
 856                 g_free(task);
 857                 return -EIO;
 858         }
 859
 860         task->created = FALSE;
 861
 862         err = get_interface(task);
 863         if (err < 0) {
 864                 err = add_interface(task);
 865                 if (err < 0) {
 866                         g_free(task);
 867                         return err;
 868                 }
 869         }
 870
 871         task->state = STATE_INACTIVE;
 872
 873         tasks = g_slist_append(tasks, task);
 874
 875         add_filter(task);
 876
 877         add_network(task);
 878
 879         select_network(task);
 880         disable_network(task);
 881
 882         return 0;
 883 }
 884
 885 int __supplicant_stop(struct connman_iface *iface)
 886 {
 887         struct supplicant_task *task;
 888
 889         task = find_task(iface->index);
 890         if (task == NULL)
 891                 return -ENODEV;
 892
 893         DBG("interface %s", task->ifname);
 894
 895         tasks = g_slist_remove(tasks, task);
 896
 897         remove_network(task);
 898
 899         dbus_connection_unref(task->conn);
 900
 901         g_free(task->ifname);
 902         g_free(task->network);
 903         g_free(task->path);
 904         g_free(task);
 905
 906         return 0;
 907 }
 908
 909 int __supplicant_scan(struct connman_iface *iface)
 910 {
 911         struct supplicant_task *task;
 912         int err;
 913
 914         task = find_task(iface->index);
 915         if (task == NULL)
 916                 return -ENODEV;
 917
 918         DBG("interface %s", task->ifname);
 919
 920         switch (task->state) {
 921         case STATE_SCANNING:
 922                 return -EALREADY;
 923         case STATE_ASSOCIATING:
 924         case STATE_ASSOCIATED:
 925         case STATE_4WAY_HANDSHAKE:
 926         case STATE_GROUP_HANDSHAKE:
 927                 return -EBUSY;
 928         default:
 929                 break;
 930         }
 931
 932         err = initiate_scan(task);
 933
 934         return 0;
 935 }
 936
 937 int __supplicant_connect(struct connman_iface *iface,
 938                                 const char *network, const char *passphrase)
 939 {
 940         struct supplicant_task *task;
 941
 942         task = find_task(iface->index);
 943         if (task == NULL)
 944                 return -ENODEV;
 945
 946         DBG("interface %s", task->ifname);
 947
 948         set_network(task, network, passphrase);
 949
 950         enable_network(task);
 951
 952         return 0;
 953 }
 954
 955 int __supplicant_disconnect(struct connman_iface *iface)
 956 {
 957         struct supplicant_task *task;
 958
 959         task = find_task(iface->index);
 960         if (task == NULL)
 961                 return -ENODEV;
 962
 963         DBG("interface %s", task->ifname);
 964
 965         disable_network(task);
 966
 967         return 0;
 968 }