plugins/wifi.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2012  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 <unistd.h>
  27 #include <stdlib.h>
  28 #include <errno.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/socket.h>
  33 #include <linux/if_arp.h>
  34 #include <linux/wireless.h>
  35 #include <net/ethernet.h>
  36
  37 #ifndef IFF_LOWER_UP
  38 #define IFF_LOWER_UP    0x10000
  39 #endif
  40
  41 #include <dbus/dbus.h>
  42 #include <glib.h>
  43
  44 #define CONNMAN_API_SUBJECT_TO_CHANGE
  45 #include <connman/plugin.h>
  46 #include <connman/inet.h>
  47 #include <connman/device.h>
  48 #include <connman/rtnl.h>
  49 #include <connman/technology.h>
  50 #include <connman/log.h>
  51 #include <connman/option.h>
  52 #include <connman/storage.h>
  53 #include <include/setting.h>
  54
  55 #include <gsupplicant/gsupplicant.h>
  56
  57 #define CLEANUP_TIMEOUT   8     /* in seconds */
  58 #define INACTIVE_TIMEOUT  12    /* in seconds */
  59 #define MAXIMUM_RETRIES   4
  60
  61 #define BGSCAN_DEFAULT "simple:30:-45:300"
  62 #define AUTOSCAN_DEFAULT "exponential:3:300"
  63
  64 static struct connman_technology *wifi_technology = NULL;
  65
  66 struct hidden_params {
  67         char ssid[32];
  68         unsigned int ssid_len;
  69         char *identity;
  70         char *passphrase;
  71         gpointer user_data;
  72 };
  73
  74 /**
  75  * Used for autoscan "emulation".
  76  * Should be removed when wpa_s autoscan support will be by default.
  77  */
  78 struct autoscan_params {
  79         int base;
  80         int limit;
  81         int interval;
  82         unsigned int timeout;
  83 };
  84
  85 struct wifi_data {
  86         char *identifier;
  87         struct connman_device *device;
  88         struct connman_network *network;
  89         struct connman_network *pending_network;
  90         GSList *networks;
  91         GSupplicantInterface *interface;
  92         GSupplicantState state;
  93         connman_bool_t connected;
  94         connman_bool_t disconnecting;
  95         connman_bool_t tethering;
  96         connman_bool_t bridged;
  97         const char *bridge;
  98         int index;
  99         unsigned flags;
 100         unsigned int watch;
 101         int retries;
 102         struct hidden_params *hidden;
 103         /**
 104          * autoscan "emulation".
 105          */
 106         struct autoscan_params *autoscan;
 107 };
 108
 109 static GList *iface_list = NULL;
 110
 111 static void start_autoscan(struct connman_device *device);
 112
 113 static void handle_tethering(struct wifi_data *wifi)
 114 {
 115         if (wifi->tethering == FALSE)
 116                 return;
 117
 118         if (wifi->bridge == NULL)
 119                 return;
 120
 121         if (wifi->bridged == TRUE)
 122                 return;
 123
 124         DBG("index %d bridge %s", wifi->index, wifi->bridge);
 125
 126         if (connman_inet_add_to_bridge(wifi->index, wifi->bridge) < 0)
 127                 return;
 128
 129         wifi->bridged = TRUE;
 130 }
 131
 132 static void wifi_newlink(unsigned flags, unsigned change, void *user_data)
 133 {
 134         struct connman_device *device = user_data;
 135         struct wifi_data *wifi = connman_device_get_data(device);
 136
 137         DBG("index %d flags %d change %d", wifi->index, flags, change);
 138
 139         if (!change)
 140                 return;
 141
 142         if ((wifi->flags & IFF_UP) != (flags & IFF_UP)) {
 143                 if (flags & IFF_UP)
 144                         DBG("interface up");
 145                 else
 146                         DBG("interface down");
 147         }
 148
 149         if ((wifi->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 150                 if (flags & IFF_LOWER_UP) {
 151                         DBG("carrier on");
 152
 153                         handle_tethering(wifi);
 154                 } else
 155                         DBG("carrier off");
 156         }
 157
 158         wifi->flags = flags;
 159 }
 160
 161 static int wifi_probe(struct connman_device *device)
 162 {
 163         struct wifi_data *wifi;
 164
 165         DBG("device %p", device);
 166
 167         wifi = g_try_new0(struct wifi_data, 1);
 168         if (wifi == NULL)
 169                 return -ENOMEM;
 170
 171         wifi->connected = FALSE;
 172         wifi->disconnecting = FALSE;
 173         wifi->tethering = FALSE;
 174         wifi->bridged = FALSE;
 175         wifi->bridge = NULL;
 176         wifi->state = G_SUPPLICANT_STATE_INACTIVE;
 177
 178         connman_device_set_data(device, wifi);
 179         wifi->device = connman_device_ref(device);
 180
 181         wifi->index = connman_device_get_index(device);
 182         wifi->flags = 0;
 183
 184         wifi->watch = connman_rtnl_add_newlink_watch(wifi->index,
 185                                                         wifi_newlink, device);
 186
 187         iface_list = g_list_append(iface_list, wifi);
 188
 189         return 0;
 190 }
 191
 192 static void remove_networks(struct connman_device *device,
 193                                 struct wifi_data *wifi)
 194 {
 195         GSList *list;
 196
 197         for (list = wifi->networks; list != NULL; list = list->next) {
 198                 struct connman_network *network = list->data;
 199
 200                 connman_device_remove_network(device, network);
 201                 connman_network_unref(network);
 202         }
 203
 204         g_slist_free(wifi->networks);
 205         wifi->networks = NULL;
 206 }
 207
 208 static void reset_autoscan(struct connman_device *device)
 209 {
 210         struct wifi_data *wifi = connman_device_get_data(device);
 211         struct autoscan_params *autoscan;
 212
 213         DBG("");
 214
 215         if (wifi == NULL || wifi->autoscan == NULL)
 216                 return;
 217
 218         autoscan = wifi->autoscan;
 219
 220         if (autoscan->timeout == 0 && autoscan->interval == 0)
 221                 return;
 222
 223         g_source_remove(autoscan->timeout);
 224
 225         autoscan->timeout = 0;
 226         autoscan->interval = 0;
 227
 228         connman_device_unref(device);
 229 }
 230
 231 static void stop_autoscan(struct connman_device *device)
 232 {
 233         reset_autoscan(device);
 234
 235         connman_device_set_scanning(device, FALSE);
 236 }
 237
 238 static void wifi_remove(struct connman_device *device)
 239 {
 240         struct wifi_data *wifi = connman_device_get_data(device);
 241
 242         DBG("device %p wifi %p", device, wifi);
 243
 244         if (wifi == NULL)
 245                 return;
 246
 247         iface_list = g_list_remove(iface_list, wifi);
 248
 249         remove_networks(device, wifi);
 250
 251         connman_device_set_powered(device, FALSE);
 252         connman_device_set_data(device, NULL);
 253         connman_device_unref(wifi->device);
 254         connman_rtnl_remove_watch(wifi->watch);
 255
 256         g_supplicant_interface_set_data(wifi->interface, NULL);
 257
 258         g_free(wifi->autoscan);
 259         g_free(wifi->identifier);
 260         g_free(wifi);
 261 }
 262
 263 static int add_scan_param(gchar *hex_ssid, int freq,
 264                         GSupplicantScanParams *scan_data,
 265                         int driver_max_scan_ssids)
 266 {
 267         unsigned int i;
 268         struct scan_ssid *scan_ssid;
 269
 270         if (driver_max_scan_ssids > scan_data->num_ssids && hex_ssid != NULL) {
 271                 gchar *ssid;
 272                 unsigned int j = 0, hex;
 273                 size_t hex_ssid_len = strlen(hex_ssid);
 274
 275                 ssid = g_try_malloc0(hex_ssid_len / 2);
 276                 if (ssid == NULL)
 277                         return -ENOMEM;
 278
 279                 for (i = 0; i < hex_ssid_len; i += 2) {
 280                         sscanf(hex_ssid + i, "%02x", &hex);
 281                         ssid[j++] = hex;
 282                 }
 283
 284                 scan_ssid = g_try_new(struct scan_ssid, 1);
 285                 if (scan_ssid == NULL) {
 286                         g_free(ssid);
 287                         return -ENOMEM;
 288                 }
 289
 290                 memcpy(scan_ssid->ssid, ssid, j);
 291                 scan_ssid->ssid_len = j;
 292                 scan_data->ssids = g_slist_prepend(scan_data->ssids,
 293                                                                 scan_ssid);
 294
 295                 scan_data->num_ssids++;
 296
 297                 g_free(ssid);
 298         } else
 299                 return -EINVAL;
 300
 301         scan_data->ssids = g_slist_reverse(scan_data->ssids);
 302
 303         if (scan_data->freqs == NULL) {
 304                 scan_data->freqs = g_try_malloc0(sizeof(uint16_t) *
 305                                                 scan_data->num_ssids);
 306                 if (scan_data->freqs == NULL) {
 307                         g_slist_free_full(scan_data->ssids, g_free);
 308                         return -ENOMEM;
 309                 }
 310         } else {
 311                 scan_data->freqs = g_try_realloc(scan_data->freqs,
 312                                 sizeof(uint16_t) * scan_data->num_ssids);
 313                 if (scan_data->freqs == NULL) {
 314                         g_slist_free_full(scan_data->ssids, g_free);
 315                         return -ENOMEM;
 316                 }
 317                 scan_data->freqs[scan_data->num_ssids - 1] = 0;
 318         }
 319
 320         /* Don't add duplicate entries */
 321         for (i = 0; i < scan_data->num_ssids; i++) {
 322                 if (scan_data->freqs[i] == 0) {
 323                         scan_data->freqs[i] = freq;
 324                         break;
 325                 } else if (scan_data->freqs[i] == freq)
 326                         break;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static int get_hidden_connections(int max_ssids,
 333                                 GSupplicantScanParams *scan_data)
 334 {
 335         GKeyFile *keyfile;
 336         gchar **services;
 337         char *ssid;
 338         gchar *str;
 339         int i, freq;
 340         gboolean value;
 341         int num_ssids = 0, add_param_failed = 0;
 342
 343         services = connman_storage_get_services();
 344         for (i = 0; services && services[i]; i++) {
 345                 if (strncmp(services[i], "wifi_", 5) != 0)
 346                         continue;
 347
 348                 keyfile = connman_storage_load_service(services[i]);
 349
 350                 value = g_key_file_get_boolean(keyfile,
 351                                         services[i], "Hidden", NULL);
 352                 if (value == FALSE) {
 353                         g_key_file_free(keyfile);
 354                         continue;
 355                 }
 356
 357                 value = g_key_file_get_boolean(keyfile,
 358                                         services[i], "Favorite", NULL);
 359                 if (value == FALSE) {
 360                         g_key_file_free(keyfile);
 361                         continue;
 362                 }
 363
 364                 value = g_key_file_get_boolean(keyfile,
 365                                         services[i], "AutoConnect", NULL);
 366                 if (value == FALSE) {
 367                         g_key_file_free(keyfile);
 368                         continue;
 369                 }
 370
 371                 ssid = g_key_file_get_string(keyfile,
 372                                         services[i], "SSID", NULL);
 373
 374                 freq = g_key_file_get_integer(keyfile, services[i],
 375                                         "Frequency", NULL);
 376
 377                 if (add_scan_param(ssid, freq, scan_data, max_ssids) < 0) {
 378                         str = g_key_file_get_string(keyfile,
 379                                         services[i], "Name", NULL);
 380                         DBG("Cannot scan %s (%s)", ssid, str);
 381                         g_free(str);
 382                         add_param_failed++;
 383                 }
 384
 385                 num_ssids++;
 386
 387                 g_key_file_free(keyfile);
 388         }
 389
 390         if (add_param_failed > 0)
 391                 connman_warn("Unable to scan %d out of %d SSIDs (max is %d)",
 392                         add_param_failed, num_ssids, max_ssids);
 393
 394         g_strfreev(services);
 395
 396         return num_ssids > max_ssids ? max_ssids : num_ssids;
 397 }
 398
 399 static int throw_wifi_scan(struct connman_device *device,
 400                         GSupplicantInterfaceCallback callback)
 401 {
 402         struct wifi_data *wifi = connman_device_get_data(device);
 403         int ret;
 404
 405         DBG("device %p %p", device, wifi->interface);
 406
 407         if (wifi->tethering == TRUE)
 408                 return 0;
 409
 410         if (connman_device_get_scanning(device) == TRUE)
 411                 return -EALREADY;
 412
 413         connman_device_ref(device);
 414
 415         ret = g_supplicant_interface_scan(wifi->interface, NULL,
 416                                                 callback, device);
 417         if (ret == 0)
 418                 connman_device_set_scanning(device, TRUE);
 419         else
 420                 connman_device_unref(device);
 421
 422         return ret;
 423 }
 424
 425 static void hidden_free(struct hidden_params *hidden)
 426 {
 427         if (hidden == NULL)
 428                 return;
 429
 430         g_free(hidden->identity);
 431         g_free(hidden->passphrase);
 432         g_free(hidden);
 433 }
 434
 435 static void scan_callback(int result, GSupplicantInterface *interface,
 436                                                 void *user_data)
 437 {
 438         struct connman_device *device = user_data;
 439         struct wifi_data *wifi = connman_device_get_data(device);
 440
 441         DBG("result %d", result);
 442
 443         if (wifi != NULL && wifi->hidden != NULL) {
 444                 connman_network_clear_hidden(wifi->hidden->user_data);
 445                 hidden_free(wifi->hidden);
 446                 wifi->hidden = NULL;
 447         }
 448
 449         if (result < 0)
 450                 connman_device_reset_scanning(device);
 451
 452         connman_device_set_scanning(device, FALSE);
 453         start_autoscan(device);
 454         connman_device_unref(device);
 455 }
 456
 457 static void scan_callback_hidden(int result,
 458                         GSupplicantInterface *interface, void *user_data)
 459 {
 460         struct connman_device *device = user_data;
 461         struct wifi_data *wifi = connman_device_get_data(device);
 462         int driver_max_ssids;
 463
 464         DBG("result %d", result);
 465
 466         /*
 467          * Scan hidden networks so that we can autoconnect to them.
 468          */
 469         driver_max_ssids = g_supplicant_interface_get_max_scan_ssids(
 470                                                         wifi->interface);
 471         DBG("max ssids %d", driver_max_ssids);
 472
 473         if (driver_max_ssids > 0) {
 474                 GSupplicantScanParams *scan_params;
 475                 int ret;
 476
 477                 scan_params = g_try_malloc0(sizeof(GSupplicantScanParams));
 478                 if (scan_params == NULL)
 479                         goto out;
 480
 481                 if (get_hidden_connections(driver_max_ssids,
 482                                                 scan_params) > 0) {
 483                         ret = g_supplicant_interface_scan(wifi->interface,
 484                                                         scan_params,
 485                                                         scan_callback,
 486                                                         device);
 487                         if (ret == 0)
 488                                 return;
 489                 }
 490
 491                 g_supplicant_free_scan_params(scan_params);
 492         }
 493
 494 out:
 495         scan_callback(result, interface, user_data);
 496 }
 497
 498 static gboolean autoscan_timeout(gpointer data)
 499 {
 500         struct connman_device *device = data;
 501         struct wifi_data *wifi = connman_device_get_data(device);
 502         struct autoscan_params *autoscan;
 503         int interval;
 504
 505         autoscan = wifi->autoscan;
 506
 507         if (autoscan->interval <= 0) {
 508                 interval = autoscan->base;
 509                 goto set_interval;
 510         } else
 511                 interval = autoscan->interval * autoscan->base;
 512
 513         if (autoscan->interval >= autoscan->limit)
 514                 interval = autoscan->limit;
 515
 516         throw_wifi_scan(wifi->device, scan_callback_hidden);
 517
 518 set_interval:
 519         DBG("interval %d", interval);
 520
 521         autoscan->interval = interval;
 522
 523         autoscan->timeout = g_timeout_add_seconds(interval,
 524                                                 autoscan_timeout, device);
 525
 526         return FALSE;
 527 }
 528
 529 static void start_autoscan(struct connman_device *device)
 530 {
 531         struct wifi_data *wifi = connman_device_get_data(device);
 532         struct autoscan_params *autoscan;
 533
 534         DBG("");
 535
 536         if (wifi == NULL)
 537                 return;
 538
 539         autoscan = wifi->autoscan;
 540         if (autoscan == NULL)
 541                 return;
 542
 543         if (autoscan->timeout > 0 || autoscan->interval > 0)
 544                 return;
 545
 546         connman_device_ref(device);
 547
 548         autoscan_timeout(device);
 549 }
 550
 551 static struct autoscan_params *parse_autoscan_params(const char *params)
 552 {
 553         struct autoscan_params *autoscan;
 554         char **list_params;
 555         int limit;
 556         int base;
 557
 558         DBG("Emulating autoscan");
 559
 560         list_params = g_strsplit(params, ":", 0);
 561         if (list_params == 0)
 562                 return NULL;
 563
 564         if (g_strv_length(list_params) < 3) {
 565                 g_strfreev(list_params);
 566                 return NULL;
 567         }
 568
 569         base = atoi(list_params[1]);
 570         limit = atoi(list_params[2]);
 571
 572         g_strfreev(list_params);
 573
 574         autoscan = g_try_malloc0(sizeof(struct autoscan_params));
 575         if (autoscan == NULL) {
 576                 DBG("Could not allocate memory for autoscan");
 577                 return NULL;
 578         }
 579
 580         DBG("base %d - limit %d", base, limit);
 581         autoscan->base = base;
 582         autoscan->limit = limit;
 583
 584         return autoscan;
 585 }
 586
 587 static void setup_autoscan(struct wifi_data *wifi)
 588 {
 589         if (wifi->autoscan == NULL)
 590                 wifi->autoscan = parse_autoscan_params(AUTOSCAN_DEFAULT);
 591
 592         start_autoscan(wifi->device);
 593 }
 594
 595 static void interface_create_callback(int result,
 596                                         GSupplicantInterface *interface,
 597                                                         void *user_data)
 598 {
 599         struct wifi_data *wifi = user_data;
 600
 601         DBG("result %d ifname %s, wifi %p", result,
 602                                 g_supplicant_interface_get_ifname(interface),
 603                                 wifi);
 604
 605         if (result < 0 || wifi == NULL)
 606                 return;
 607
 608         wifi->interface = interface;
 609         g_supplicant_interface_set_data(interface, wifi);
 610
 611         if (g_supplicant_interface_get_ready(interface) == FALSE)
 612                 return;
 613
 614         DBG("interface is ready wifi %p tethering %d", wifi, wifi->tethering);
 615
 616         if (wifi->device == NULL) {
 617                 connman_error("WiFi device not set");
 618                 return;
 619         }
 620
 621         connman_device_set_powered(wifi->device, TRUE);
 622
 623         if (connman_setting_get_bool("BackgroundScanning") == FALSE)
 624                 return;
 625
 626         /* Setting up automatic scanning */
 627         setup_autoscan(wifi);
 628 }
 629
 630 static int wifi_enable(struct connman_device *device)
 631 {
 632         struct wifi_data *wifi = connman_device_get_data(device);
 633         const char *interface = connman_device_get_string(device, "Interface");
 634         const char *driver = connman_option_get_string("wifi");
 635         int ret;
 636
 637         DBG("device %p %p", device, wifi);
 638
 639         ret = g_supplicant_interface_create(interface, driver, NULL,
 640                                                 interface_create_callback,
 641                                                         wifi);
 642         if (ret < 0)
 643                 return ret;
 644
 645         return -EINPROGRESS;
 646 }
 647
 648 static int wifi_disable(struct connman_device *device)
 649 {
 650         struct wifi_data *wifi = connman_device_get_data(device);
 651         int ret;
 652
 653         DBG("device %p", device);
 654
 655         wifi->connected = FALSE;
 656         wifi->disconnecting = FALSE;
 657
 658         if (wifi->pending_network != NULL)
 659                 wifi->pending_network = NULL;
 660
 661         stop_autoscan(device);
 662
 663         /* In case of a user scan, device is still referenced */
 664         if (connman_device_get_scanning(device) == TRUE) {
 665                 connman_device_set_scanning(device, FALSE);
 666                 connman_device_unref(wifi->device);
 667         }
 668
 669         remove_networks(device, wifi);
 670
 671         ret = g_supplicant_interface_remove(wifi->interface, NULL, NULL);
 672         if (ret < 0)
 673                 return ret;
 674
 675         return -EINPROGRESS;
 676 }
 677
 678 struct last_connected {
 679         GTimeVal modified;
 680         gchar *ssid;
 681         int freq;
 682 };
 683
 684 static gint sort_entry(gconstpointer a, gconstpointer b, gpointer user_data)
 685 {
 686         GTimeVal *aval = (GTimeVal *)a;
 687         GTimeVal *bval = (GTimeVal *)b;
 688
 689         /* Note that the sort order is descending */
 690         if (aval->tv_sec < bval->tv_sec)
 691                 return 1;
 692
 693         if (aval->tv_sec > bval->tv_sec)
 694                 return -1;
 695
 696         return 0;
 697 }
 698
 699 static void free_entry(gpointer data)
 700 {
 701         struct last_connected *entry = data;
 702
 703         g_free(entry->ssid);
 704         g_free(entry);
 705 }
 706
 707 static int get_latest_connections(int max_ssids,
 708                                 GSupplicantScanParams *scan_data)
 709 {
 710         GSequenceIter *iter;
 711         GSequence *latest_list;
 712         struct last_connected *entry;
 713         GKeyFile *keyfile;
 714         GTimeVal modified;
 715         gchar **services;
 716         gchar *str;
 717         char *ssid;
 718         int i, freq;
 719         int num_ssids = 0;
 720
 721         latest_list = g_sequence_new(free_entry);
 722         if (latest_list == NULL)
 723                 return -ENOMEM;
 724
 725         services = connman_storage_get_services();
 726         for (i = 0; services && services[i]; i++) {
 727                 if (strncmp(services[i], "wifi_", 5) != 0)
 728                         continue;
 729
 730                 keyfile = connman_storage_load_service(services[i]);
 731
 732                 str = g_key_file_get_string(keyfile,
 733                                         services[i], "Favorite", NULL);
 734                 if (str == NULL || g_strcmp0(str, "true")) {
 735                         if (str)
 736                                 g_free(str);
 737                         g_key_file_free(keyfile);
 738                         continue;
 739                 }
 740                 g_free(str);
 741
 742                 str = g_key_file_get_string(keyfile,
 743                                         services[i], "AutoConnect", NULL);
 744                 if (str == NULL || g_strcmp0(str, "true")) {
 745                         if (str)
 746                                 g_free(str);
 747                         g_key_file_free(keyfile);
 748                         continue;
 749                 }
 750                 g_free(str);
 751
 752                 str = g_key_file_get_string(keyfile,
 753                                         services[i], "Modified", NULL);
 754                 if (str != NULL) {
 755                         g_time_val_from_iso8601(str, &modified);
 756                         g_free(str);
 757                 }
 758
 759                 ssid = g_key_file_get_string(keyfile,
 760                                         services[i], "SSID", NULL);
 761
 762                 freq = g_key_file_get_integer(keyfile, services[i],
 763                                         "Frequency", NULL);
 764                 if (freq) {
 765                         entry = g_try_new(struct last_connected, 1);
 766                         if (entry == NULL) {
 767                                 g_sequence_free(latest_list);
 768                                 g_key_file_free(keyfile);
 769                                 g_free(ssid);
 770                                 return -ENOMEM;
 771                         }
 772
 773                         entry->ssid = ssid;
 774                         entry->modified = modified;
 775                         entry->freq = freq;
 776
 777                         g_sequence_insert_sorted(latest_list, entry,
 778                                                 sort_entry, NULL);
 779                         num_ssids++;
 780                 } else
 781                         g_free(ssid);
 782
 783                 g_key_file_free(keyfile);
 784         }
 785
 786         g_strfreev(services);
 787
 788         num_ssids = num_ssids > max_ssids ? max_ssids : num_ssids;
 789
 790         iter = g_sequence_get_begin_iter(latest_list);
 791
 792         for (i = 0; i < num_ssids; i++) {
 793                 entry = g_sequence_get(iter);
 794
 795                 DBG("ssid %s freq %d modified %lu", entry->ssid, entry->freq,
 796                                                 entry->modified.tv_sec);
 797
 798                 add_scan_param(entry->ssid, entry->freq, scan_data, max_ssids);
 799
 800                 iter = g_sequence_iter_next(iter);
 801         }
 802
 803         g_sequence_free(latest_list);
 804         return num_ssids;
 805 }
 806
 807 static int wifi_scan(struct connman_device *device)
 808 {
 809         reset_autoscan(device);
 810
 811         return throw_wifi_scan(device, scan_callback_hidden);
 812 }
 813
 814 static int wifi_scan_fast(struct connman_device *device)
 815 {
 816         struct wifi_data *wifi = connman_device_get_data(device);
 817         GSupplicantScanParams *scan_params = NULL;
 818         int ret;
 819         int driver_max_ssids = 0;
 820
 821         DBG("device %p %p", device, wifi->interface);
 822
 823         if (wifi->tethering == TRUE)
 824                 return 0;
 825
 826         if (connman_device_get_scanning(device) == TRUE)
 827                 return -EALREADY;
 828
 829         driver_max_ssids = g_supplicant_interface_get_max_scan_ssids(
 830                                                         wifi->interface);
 831         DBG("max ssids %d", driver_max_ssids);
 832         if (driver_max_ssids == 0)
 833                 return wifi_scan(device);
 834
 835         scan_params = g_try_malloc0(sizeof(GSupplicantScanParams));
 836         if (scan_params == NULL)
 837                 return -ENOMEM;
 838
 839         ret = get_latest_connections(driver_max_ssids, scan_params);
 840         if (ret <= 0) {
 841                 g_supplicant_free_scan_params(scan_params);
 842                 return wifi_scan(device);
 843         }
 844
 845         connman_device_ref(device);
 846         reset_autoscan(device);
 847
 848         ret = g_supplicant_interface_scan(wifi->interface, scan_params,
 849                                                 scan_callback, device);
 850         if (ret == 0)
 851                 connman_device_set_scanning(device, TRUE);
 852         else {
 853                 g_supplicant_free_scan_params(scan_params);
 854                 connman_device_unref(device);
 855         }
 856
 857         return ret;
 858 }
 859
 860 /*
 861  * This func is only used when connecting to this specific AP first time.
 862  * It is not used when system autoconnects to hidden AP.
 863  */
 864 static int wifi_scan_hidden(struct connman_device *device,
 865                 const char *ssid, unsigned int ssid_len,
 866                 const char *identity, const char* passphrase,
 867                 gpointer user_data)
 868 {
 869         struct wifi_data *wifi = connman_device_get_data(device);
 870         GSupplicantScanParams *scan_params = NULL;
 871         struct scan_ssid *scan_ssid;
 872         struct hidden_params *hidden;
 873         int ret;
 874
 875         DBG("hidden SSID %s", ssid);
 876
 877         if (wifi->tethering == TRUE || wifi->hidden != NULL)
 878                 return -EBUSY;
 879
 880         if (ssid == NULL || ssid_len == 0 || ssid_len > 32)
 881                 return -EINVAL;
 882
 883         if (connman_device_get_scanning(device) == TRUE)
 884                 return -EALREADY;
 885
 886         scan_params = g_try_malloc0(sizeof(GSupplicantScanParams));
 887         if (scan_params == NULL)
 888                 return -ENOMEM;
 889
 890         scan_ssid = g_try_new(struct scan_ssid, 1);
 891         if (scan_ssid == NULL) {
 892                 g_free(scan_params);
 893                 return -ENOMEM;
 894         }
 895
 896         memcpy(scan_ssid->ssid, ssid, ssid_len);
 897         scan_ssid->ssid_len = ssid_len;
 898         scan_params->ssids = g_slist_prepend(scan_params->ssids, scan_ssid);
 899
 900         scan_params->num_ssids = 1;
 901
 902         hidden = g_try_new0(struct hidden_params, 1);
 903         if (hidden == NULL) {
 904                 g_free(scan_params);
 905                 return -ENOMEM;
 906         }
 907         memcpy(hidden->ssid, ssid, ssid_len);
 908         hidden->ssid_len = ssid_len;
 909         hidden->identity = g_strdup(identity);
 910         hidden->passphrase = g_strdup(passphrase);
 911         hidden->user_data = user_data;
 912         wifi->hidden = hidden;
 913
 914         connman_device_ref(device);
 915
 916         reset_autoscan(device);
 917
 918         ret = g_supplicant_interface_scan(wifi->interface, scan_params,
 919                         scan_callback, device);
 920         if (ret == 0)
 921                 connman_device_set_scanning(device, TRUE);
 922         else {
 923                 connman_device_unref(device);
 924                 g_supplicant_free_scan_params(scan_params);
 925                 hidden_free(wifi->hidden);
 926                 wifi->hidden = NULL;
 927         }
 928
 929         return ret;
 930 }
 931
 932 static struct connman_device_driver wifi_ng_driver = {
 933         .name           = "wifi",
 934         .type           = CONNMAN_DEVICE_TYPE_WIFI,
 935         .priority       = CONNMAN_DEVICE_PRIORITY_LOW,
 936         .probe          = wifi_probe,
 937         .remove         = wifi_remove,
 938         .enable         = wifi_enable,
 939         .disable        = wifi_disable,
 940         .scan           = wifi_scan,
 941         .scan_fast      = wifi_scan_fast,
 942         .scan_hidden    = wifi_scan_hidden,
 943 };
 944
 945 static void system_ready(void)
 946 {
 947         DBG("");
 948
 949         if (connman_device_driver_register(&wifi_ng_driver) < 0)
 950                 connman_error("Failed to register WiFi driver");
 951 }
 952
 953 static void system_killed(void)
 954 {
 955         DBG("");
 956
 957         connman_device_driver_unregister(&wifi_ng_driver);
 958 }
 959
 960 static int network_probe(struct connman_network *network)
 961 {
 962         DBG("network %p", network);
 963
 964         return 0;
 965 }
 966
 967 static void network_remove(struct connman_network *network)
 968 {
 969         struct connman_device *device = connman_network_get_device(network);
 970         struct wifi_data *wifi;
 971
 972         DBG("network %p", network);
 973
 974         wifi = connman_device_get_data(device);
 975         if (wifi == NULL)
 976                 return;
 977
 978         if (wifi->network != network)
 979                 return;
 980
 981         wifi->network = NULL;
 982 }
 983
 984 static void connect_callback(int result, GSupplicantInterface *interface,
 985                                                         void *user_data)
 986 {
 987         struct connman_network *network = user_data;
 988
 989         DBG("network %p result %d", network, result);
 990
 991         if (result == -ENOKEY) {
 992                 connman_network_set_error(network,
 993                                         CONNMAN_NETWORK_ERROR_INVALID_KEY);
 994         } else if (result < 0) {
 995                 connman_network_set_error(network,
 996                                         CONNMAN_NETWORK_ERROR_CONFIGURE_FAIL);
 997         }
 998 }
 999
1000 static GSupplicantSecurity network_security(const char *security)
1001 {
1002         if (g_str_equal(security, "none") == TRUE)
1003                 return G_SUPPLICANT_SECURITY_NONE;
1004         else if (g_str_equal(security, "wep") == TRUE)
1005                 return G_SUPPLICANT_SECURITY_WEP;
1006         else if (g_str_equal(security, "psk") == TRUE)
1007                 return G_SUPPLICANT_SECURITY_PSK;
1008         else if (g_str_equal(security, "wpa") == TRUE)
1009                 return G_SUPPLICANT_SECURITY_PSK;
1010         else if (g_str_equal(security, "rsn") == TRUE)
1011                 return G_SUPPLICANT_SECURITY_PSK;
1012         else if (g_str_equal(security, "ieee8021x") == TRUE)
1013                 return G_SUPPLICANT_SECURITY_IEEE8021X;
1014
1015         return G_SUPPLICANT_SECURITY_UNKNOWN;
1016 }
1017
1018 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
1019 {
1020         const char *security, *passphrase, *agent_passphrase;
1021
1022         memset(ssid, 0, sizeof(*ssid));
1023         ssid->mode = G_SUPPLICANT_MODE_INFRA;
1024         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
1025                                                 &ssid->ssid_len);
1026         ssid->scan_ssid = 1;
1027         security = connman_network_get_string(network, "WiFi.Security");
1028         ssid->security = network_security(security);
1029         passphrase = connman_network_get_string(network,
1030                                                 "WiFi.Passphrase");
1031         if (passphrase == NULL || strlen(passphrase) == 0) {
1032
1033                 /* Use agent provided passphrase as a fallback */
1034                 agent_passphrase = connman_network_get_string(network,
1035                                                 "WiFi.AgentPassphrase");
1036
1037                 if (agent_passphrase == NULL || strlen(agent_passphrase) == 0)
1038                         ssid->passphrase = NULL;
1039                 else
1040                         ssid->passphrase = agent_passphrase;
1041         } else
1042                 ssid->passphrase = passphrase;
1043
1044         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
1045
1046         /*
1047          * If our private key password is unset,
1048          * we use the supplied passphrase. That is needed
1049          * for PEAP where 2 passphrases (identity and client
1050          * cert may have to be provided.
1051          */
1052         if (connman_network_get_string(network,
1053                                         "WiFi.PrivateKeyPassphrase") == NULL)
1054                 connman_network_set_string(network,
1055                                                 "WiFi.PrivateKeyPassphrase",
1056                                                 ssid->passphrase);
1057         /* We must have an identity for both PEAP and TLS */
1058         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
1059
1060         /* Use agent provided identity as a fallback */
1061         if (ssid->identity == NULL || strlen(ssid->identity) == 0)
1062                 ssid->identity = connman_network_get_string(network,
1063                                                         "WiFi.AgentIdentity");
1064
1065         ssid->ca_cert_path = connman_network_get_string(network,
1066                                                         "WiFi.CACertFile");
1067         ssid->client_cert_path = connman_network_get_string(network,
1068                                                         "WiFi.ClientCertFile");
1069         ssid->private_key_path = connman_network_get_string(network,
1070                                                         "WiFi.PrivateKeyFile");
1071         ssid->private_key_passphrase = connman_network_get_string(network,
1072                                                 "WiFi.PrivateKeyPassphrase");
1073         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
1074
1075         ssid->use_wps = connman_network_get_bool(network, "WiFi.UseWPS");
1076         ssid->pin_wps = connman_network_get_string(network, "WiFi.PinWPS");
1077
1078         if (connman_setting_get_bool("BackgroundScanning") == TRUE)
1079                 ssid->bgscan = BGSCAN_DEFAULT;
1080 }
1081
1082 static int network_connect(struct connman_network *network)
1083 {
1084         struct connman_device *device = connman_network_get_device(network);
1085         struct wifi_data *wifi;
1086         GSupplicantInterface *interface;
1087         GSupplicantSSID *ssid;
1088
1089         DBG("network %p", network);
1090
1091         if (device == NULL)
1092                 return -ENODEV;
1093
1094         wifi = connman_device_get_data(device);
1095         if (wifi == NULL)
1096                 return -ENODEV;
1097
1098         ssid = g_try_malloc0(sizeof(GSupplicantSSID));
1099         if (ssid == NULL)
1100                 return -ENOMEM;
1101
1102         interface = wifi->interface;
1103
1104         ssid_init(ssid, network);
1105
1106         if (wifi->disconnecting == TRUE)
1107                 wifi->pending_network = network;
1108         else {
1109                 wifi->network = network;
1110                 wifi->retries = 0;
1111
1112                 return g_supplicant_interface_connect(interface, ssid,
1113                                                 connect_callback, network);
1114         }
1115
1116         return -EINPROGRESS;
1117 }
1118
1119 static void disconnect_callback(int result, GSupplicantInterface *interface,
1120                                                                 void *user_data)
1121 {
1122         struct wifi_data *wifi = user_data;
1123
1124         if (wifi->network != NULL) {
1125                 /*
1126                  * if result < 0 supplican return an error because
1127                  * the network is not current.
1128                  * we wont receive G_SUPPLICANT_STATE_DISCONNECTED since it
1129                  * failed, call connman_network_set_connected to report
1130                  * disconnect is completed.
1131                  */
1132                 if (result < 0)
1133                         connman_network_set_connected(wifi->network, FALSE);
1134         }
1135
1136         wifi->network = NULL;
1137
1138         wifi->disconnecting = FALSE;
1139
1140         if (wifi->pending_network != NULL) {
1141                 network_connect(wifi->pending_network);
1142                 wifi->pending_network = NULL;
1143         }
1144
1145         start_autoscan(wifi->device);
1146 }
1147
1148 static int network_disconnect(struct connman_network *network)
1149 {
1150         struct connman_device *device = connman_network_get_device(network);
1151         struct wifi_data *wifi;
1152         int err;
1153
1154         DBG("network %p", network);
1155
1156         wifi = connman_device_get_data(device);
1157         if (wifi == NULL || wifi->interface == NULL)
1158                 return -ENODEV;
1159
1160         connman_network_set_associating(network, FALSE);
1161
1162         if (wifi->disconnecting == TRUE)
1163                 return -EALREADY;
1164
1165         wifi->disconnecting = TRUE;
1166
1167         err = g_supplicant_interface_disconnect(wifi->interface,
1168                                                 disconnect_callback, wifi);
1169         if (err < 0)
1170                 wifi->disconnecting = FALSE;
1171
1172         return err;
1173 }
1174
1175 static struct connman_network_driver network_driver = {
1176         .name           = "wifi",
1177         .type           = CONNMAN_NETWORK_TYPE_WIFI,
1178         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
1179         .probe          = network_probe,
1180         .remove         = network_remove,
1181         .connect        = network_connect,
1182         .disconnect     = network_disconnect,
1183 };
1184
1185 static void interface_added(GSupplicantInterface *interface)
1186 {
1187         const char *ifname = g_supplicant_interface_get_ifname(interface);
1188         const char *driver = g_supplicant_interface_get_driver(interface);
1189         struct wifi_data *wifi;
1190
1191         wifi = g_supplicant_interface_get_data(interface);
1192
1193         /*
1194          * We can get here with a NULL wifi pointer when
1195          * the interface added signal is sent before the
1196          * interface creation callback is called.
1197          */
1198         if (wifi == NULL)
1199                 return;
1200
1201         DBG("ifname %s driver %s wifi %p tethering %d",
1202                         ifname, driver, wifi, wifi->tethering);
1203
1204         if (wifi->device == NULL) {
1205                 connman_error("WiFi device not set");
1206                 return;
1207         }
1208
1209         connman_device_set_powered(wifi->device, TRUE);
1210
1211         if (wifi->tethering == TRUE)
1212                 return;
1213 }
1214
1215 static connman_bool_t is_idle(struct wifi_data *wifi)
1216 {
1217         DBG("state %d", wifi->state);
1218
1219         switch (wifi->state) {
1220         case G_SUPPLICANT_STATE_UNKNOWN:
1221         case G_SUPPLICANT_STATE_DISCONNECTED:
1222         case G_SUPPLICANT_STATE_INACTIVE:
1223         case G_SUPPLICANT_STATE_SCANNING:
1224                 return TRUE;
1225
1226         case G_SUPPLICANT_STATE_AUTHENTICATING:
1227         case G_SUPPLICANT_STATE_ASSOCIATING:
1228         case G_SUPPLICANT_STATE_ASSOCIATED:
1229         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1230         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1231         case G_SUPPLICANT_STATE_COMPLETED:
1232                 return FALSE;
1233         }
1234
1235         return FALSE;
1236 }
1237
1238 static connman_bool_t is_idle_wps(GSupplicantInterface *interface,
1239                                                 struct wifi_data *wifi)
1240 {
1241         /* First, let's check if WPS processing did not went wrong */
1242         if (g_supplicant_interface_get_wps_state(interface) ==
1243                 G_SUPPLICANT_WPS_STATE_FAIL)
1244                 return FALSE;
1245
1246         /* Unlike normal connection, being associated while processing wps
1247          * actually means that we are idling. */
1248         switch (wifi->state) {
1249         case G_SUPPLICANT_STATE_UNKNOWN:
1250         case G_SUPPLICANT_STATE_DISCONNECTED:
1251         case G_SUPPLICANT_STATE_INACTIVE:
1252         case G_SUPPLICANT_STATE_SCANNING:
1253         case G_SUPPLICANT_STATE_ASSOCIATED:
1254                 return TRUE;
1255         case G_SUPPLICANT_STATE_AUTHENTICATING:
1256         case G_SUPPLICANT_STATE_ASSOCIATING:
1257         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1258         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1259         case G_SUPPLICANT_STATE_COMPLETED:
1260                 return FALSE;
1261         }
1262
1263         return FALSE;
1264 }
1265
1266 static connman_bool_t handle_wps_completion(GSupplicantInterface *interface,
1267                                         struct connman_network *network,
1268                                         struct connman_device *device,
1269                                         struct wifi_data *wifi)
1270 {
1271         connman_bool_t wps;
1272
1273         wps = connman_network_get_bool(network, "WiFi.UseWPS");
1274         if (wps == TRUE) {
1275                 const unsigned char *ssid, *wps_ssid;
1276                 unsigned int ssid_len, wps_ssid_len;
1277                 const char *wps_key;
1278
1279                 /* Checking if we got associated with requested
1280                  * network */
1281                 ssid = connman_network_get_blob(network, "WiFi.SSID",
1282                                                 &ssid_len);
1283
1284                 wps_ssid = g_supplicant_interface_get_wps_ssid(
1285                         interface, &wps_ssid_len);
1286
1287                 if (wps_ssid == NULL || wps_ssid_len != ssid_len ||
1288                                 memcmp(ssid, wps_ssid, ssid_len) != 0) {
1289                         connman_network_set_associating(network, FALSE);
1290                         g_supplicant_interface_disconnect(wifi->interface,
1291                                                 disconnect_callback, wifi);
1292                         return FALSE;
1293                 }
1294
1295                 wps_key = g_supplicant_interface_get_wps_key(interface);
1296                 connman_network_set_string(network, "WiFi.Passphrase",
1297                                         wps_key);
1298
1299                 connman_network_set_string(network, "WiFi.PinWPS", NULL);
1300         }
1301
1302         return TRUE;
1303 }
1304
1305 static connman_bool_t handle_4way_handshake_failure(GSupplicantInterface *interface,
1306                                         struct connman_network *network,
1307                                         struct wifi_data *wifi)
1308 {
1309         if (wifi->state != G_SUPPLICANT_STATE_4WAY_HANDSHAKE)
1310                 return FALSE;
1311
1312         wifi->retries++;
1313
1314         if (wifi->retries < MAXIMUM_RETRIES)
1315                 return TRUE;
1316
1317         connman_network_set_error(network, CONNMAN_NETWORK_ERROR_INVALID_KEY);
1318
1319         return FALSE;
1320 }
1321
1322 static void interface_state(GSupplicantInterface *interface)
1323 {
1324         struct connman_network *network;
1325         struct connman_device *device;
1326         struct wifi_data *wifi;
1327         GSupplicantState state = g_supplicant_interface_get_state(interface);
1328         connman_bool_t wps;
1329
1330         wifi = g_supplicant_interface_get_data(interface);
1331
1332         DBG("wifi %p interface state %d", wifi, state);
1333
1334         if (wifi == NULL)
1335                 return;
1336
1337         network = wifi->network;
1338         device = wifi->device;
1339
1340         if (device == NULL || network == NULL)
1341                 return;
1342
1343         switch (state) {
1344         case G_SUPPLICANT_STATE_SCANNING:
1345                 break;
1346
1347         case G_SUPPLICANT_STATE_AUTHENTICATING:
1348         case G_SUPPLICANT_STATE_ASSOCIATING:
1349                 stop_autoscan(device);
1350
1351                 if (wifi->connected == FALSE)
1352                         connman_network_set_associating(network, TRUE);
1353
1354                 break;
1355
1356         case G_SUPPLICANT_STATE_COMPLETED:
1357                 /* though it should be already stopped: */
1358                 stop_autoscan(device);
1359
1360                 if (handle_wps_completion(interface, network, device, wifi) ==
1361                                                                         FALSE)
1362                         break;
1363
1364                 connman_network_set_connected(network, TRUE);
1365                 break;
1366
1367         case G_SUPPLICANT_STATE_DISCONNECTED:
1368                 /*
1369                  * If we're in one of the idle modes, we have
1370                  * not started association yet and thus setting
1371                  * those ones to FALSE could cancel an association
1372                  * in progress.
1373                  */
1374                 wps = connman_network_get_bool(network, "WiFi.UseWPS");
1375                 if (wps == TRUE)
1376                         if (is_idle_wps(interface, wifi) == TRUE)
1377                                 break;
1378
1379                 if (is_idle(wifi))
1380                         break;
1381
1382                 /* If previous state was 4way-handshake, then
1383                  * it's either: psk was incorrect and thus we retry
1384                  * or if we reach the maximum retries we declare the
1385                  * psk as wrong */
1386                 if (handle_4way_handshake_failure(interface,
1387                                                 network, wifi) == TRUE)
1388                         break;
1389
1390                 /* We disable the selected network, if not then
1391                  * wpa_supplicant will loop retrying */
1392                 if (g_supplicant_interface_enable_selected_network(interface,
1393                                                 FALSE) != 0)
1394                         DBG("Could not disables selected network");
1395
1396                 connman_network_set_connected(network, FALSE);
1397                 connman_network_set_associating(network, FALSE);
1398                 wifi->disconnecting = FALSE;
1399
1400                 start_autoscan(device);
1401
1402                 break;
1403
1404         case G_SUPPLICANT_STATE_INACTIVE:
1405                 connman_network_set_associating(network, FALSE);
1406                 start_autoscan(device);
1407
1408                 break;
1409
1410         case G_SUPPLICANT_STATE_UNKNOWN:
1411         case G_SUPPLICANT_STATE_ASSOCIATED:
1412         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1413         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1414                 break;
1415         }
1416
1417         wifi->state = state;
1418
1419         /* Saving wpa_s state policy:
1420          * If connected and if the state changes are roaming related:
1421          * --> We stay connected
1422          * If completed
1423          * --> We are connected
1424          * All other case:
1425          * --> We are not connected
1426          * */
1427         switch (state) {
1428         case G_SUPPLICANT_STATE_AUTHENTICATING:
1429         case G_SUPPLICANT_STATE_ASSOCIATING:
1430         case G_SUPPLICANT_STATE_ASSOCIATED:
1431         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1432         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1433                 if (wifi->connected == TRUE)
1434                         connman_warn("Probably roaming right now!"
1435                                                 " Staying connected...");
1436                 else
1437                         wifi->connected = FALSE;
1438                 break;
1439         case G_SUPPLICANT_STATE_COMPLETED:
1440                 wifi->connected = TRUE;
1441                 break;
1442         default:
1443                 wifi->connected = FALSE;
1444                 break;
1445         }
1446
1447         DBG("DONE");
1448 }
1449
1450 static void interface_removed(GSupplicantInterface *interface)
1451 {
1452         const char *ifname = g_supplicant_interface_get_ifname(interface);
1453         struct wifi_data *wifi;
1454
1455         DBG("ifname %s", ifname);
1456
1457         wifi = g_supplicant_interface_get_data(interface);
1458
1459         if (wifi != NULL && wifi->tethering == TRUE)
1460                 return;
1461
1462         if (wifi == NULL || wifi->device == NULL) {
1463                 DBG("wifi interface already removed");
1464                 return;
1465         }
1466
1467         wifi->interface = NULL;
1468         connman_device_set_powered(wifi->device, FALSE);
1469 }
1470
1471 static void scan_started(GSupplicantInterface *interface)
1472 {
1473         DBG("");
1474 }
1475
1476 static void scan_finished(GSupplicantInterface *interface)
1477 {
1478         DBG("");
1479 }
1480
1481 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
1482 {
1483         unsigned char strength;
1484
1485         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
1486         if (strength > 100)
1487                 strength = 100;
1488
1489         return strength;
1490 }
1491
1492 static void network_added(GSupplicantNetwork *supplicant_network)
1493 {
1494         struct connman_network *network;
1495         GSupplicantInterface *interface;
1496         struct wifi_data *wifi;
1497         const char *name, *identifier, *security, *group, *mode;
1498         const unsigned char *ssid;
1499         unsigned int ssid_len;
1500         connman_bool_t wps;
1501         connman_bool_t wps_pbc;
1502         connman_bool_t wps_ready;
1503         connman_bool_t wps_advertizing;
1504
1505         DBG("");
1506
1507         interface = g_supplicant_network_get_interface(supplicant_network);
1508         wifi = g_supplicant_interface_get_data(interface);
1509         name = g_supplicant_network_get_name(supplicant_network);
1510         identifier = g_supplicant_network_get_identifier(supplicant_network);
1511         security = g_supplicant_network_get_security(supplicant_network);
1512         group = g_supplicant_network_get_identifier(supplicant_network);
1513         wps = g_supplicant_network_get_wps(supplicant_network);
1514         wps_pbc = g_supplicant_network_is_wps_pbc(supplicant_network);
1515         wps_ready = g_supplicant_network_is_wps_active(supplicant_network);
1516         wps_advertizing = g_supplicant_network_is_wps_advertizing(
1517                                                         supplicant_network);
1518         mode = g_supplicant_network_get_mode(supplicant_network);
1519
1520         if (wifi == NULL)
1521                 return;
1522
1523         ssid = g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
1524
1525         network = connman_device_get_network(wifi->device, identifier);
1526
1527         if (network == NULL) {
1528                 network = connman_network_create(identifier,
1529                                                 CONNMAN_NETWORK_TYPE_WIFI);
1530                 if (network == NULL)
1531                         return;
1532
1533                 connman_network_set_index(network, wifi->index);
1534
1535                 if (connman_device_add_network(wifi->device, network) < 0) {
1536                         connman_network_unref(network);
1537                         return;
1538                 }
1539
1540                 wifi->networks = g_slist_append(wifi->networks, network);
1541         }
1542
1543         if (name != NULL && name[0] != '\0')
1544                 connman_network_set_name(network, name);
1545
1546         connman_network_set_blob(network, "WiFi.SSID",
1547                                                 ssid, ssid_len);
1548         connman_network_set_string(network, "WiFi.Security", security);
1549         connman_network_set_strength(network,
1550                                 calculate_strength(supplicant_network));
1551         connman_network_set_bool(network, "WiFi.WPS", wps);
1552
1553         if (wps == TRUE) {
1554                 /* Is AP advertizing for WPS association?
1555                  * If so, we decide to use WPS by default */
1556                 if (wps_ready == TRUE && wps_pbc == TRUE &&
1557                                                 wps_advertizing == TRUE)
1558                         connman_network_set_bool(network, "WiFi.UseWPS", TRUE);
1559         }
1560
1561         connman_network_set_frequency(network,
1562                         g_supplicant_network_get_frequency(supplicant_network));
1563
1564         connman_network_set_available(network, TRUE);
1565         connman_network_set_string(network, "WiFi.Mode", mode);
1566
1567         if (ssid != NULL)
1568                 connman_network_set_group(network, group);
1569
1570         if (wifi->hidden != NULL && ssid != NULL) {
1571                 if (wifi->hidden->ssid_len == ssid_len &&
1572                                 memcmp(wifi->hidden->ssid, ssid,
1573                                                 ssid_len) == 0) {
1574                         connman_network_connect_hidden(network,
1575                                         wifi->hidden->identity,
1576                                         wifi->hidden->passphrase,
1577                                         wifi->hidden->user_data);
1578                         wifi->hidden->user_data = NULL;
1579                         hidden_free(wifi->hidden);
1580                         wifi->hidden = NULL;
1581                 }
1582         }
1583 }
1584
1585 static void network_removed(GSupplicantNetwork *network)
1586 {
1587         GSupplicantInterface *interface;
1588         struct wifi_data *wifi;
1589         const char *name, *identifier;
1590         struct connman_network *connman_network;
1591
1592         interface = g_supplicant_network_get_interface(network);
1593         wifi = g_supplicant_interface_get_data(interface);
1594         identifier = g_supplicant_network_get_identifier(network);
1595         name = g_supplicant_network_get_name(network);
1596
1597         DBG("name %s", name);
1598
1599         if (wifi == NULL)
1600                 return;
1601
1602         connman_network = connman_device_get_network(wifi->device, identifier);
1603         if (connman_network == NULL)
1604                 return;
1605
1606         wifi->networks = g_slist_remove(wifi->networks, connman_network);
1607
1608         connman_device_remove_network(wifi->device, connman_network);
1609         connman_network_unref(connman_network);
1610 }
1611
1612 static void network_changed(GSupplicantNetwork *network, const char *property)
1613 {
1614         GSupplicantInterface *interface;
1615         struct wifi_data *wifi;
1616         const char *name, *identifier;
1617         struct connman_network *connman_network;
1618
1619         interface = g_supplicant_network_get_interface(network);
1620         wifi = g_supplicant_interface_get_data(interface);
1621         identifier = g_supplicant_network_get_identifier(network);
1622         name = g_supplicant_network_get_name(network);
1623
1624         DBG("name %s", name);
1625
1626         if (wifi == NULL)
1627                 return;
1628
1629         connman_network = connman_device_get_network(wifi->device, identifier);
1630         if (connman_network == NULL)
1631                 return;
1632
1633         if (g_str_equal(property, "Signal") == TRUE) {
1634                connman_network_set_strength(connman_network,
1635                                         calculate_strength(network));
1636                connman_network_update(connman_network);
1637         }
1638 }
1639
1640 static void debug(const char *str)
1641 {
1642         if (getenv("CONNMAN_SUPPLICANT_DEBUG"))
1643                 connman_debug("%s", str);
1644 }
1645
1646 static const GSupplicantCallbacks callbacks = {
1647         .system_ready           = system_ready,
1648         .system_killed          = system_killed,
1649         .interface_added        = interface_added,
1650         .interface_state        = interface_state,
1651         .interface_removed      = interface_removed,
1652         .scan_started           = scan_started,
1653         .scan_finished          = scan_finished,
1654         .network_added          = network_added,
1655         .network_removed        = network_removed,
1656         .network_changed        = network_changed,
1657         .debug                  = debug,
1658 };
1659
1660
1661 static int tech_probe(struct connman_technology *technology)
1662 {
1663         wifi_technology = technology;
1664
1665         return 0;
1666 }
1667
1668 static void tech_remove(struct connman_technology *technology)
1669 {
1670         wifi_technology = NULL;
1671 }
1672
1673 struct wifi_tethering_info {
1674         struct wifi_data *wifi;
1675         struct connman_technology *technology;
1676         char *ifname;
1677         GSupplicantSSID *ssid;
1678 };
1679
1680 static GSupplicantSSID *ssid_ap_init(const char *ssid, const char *passphrase)
1681 {
1682         GSupplicantSSID *ap;
1683
1684         ap = g_try_malloc0(sizeof(GSupplicantSSID));
1685         if (ap == NULL)
1686                 return NULL;
1687
1688         ap->mode = G_SUPPLICANT_MODE_MASTER;
1689         ap->ssid = ssid;
1690         ap->ssid_len = strlen(ssid);
1691         ap->scan_ssid = 0;
1692         ap->freq = 2412;
1693
1694         if (passphrase == NULL || strlen(passphrase) == 0) {
1695                 ap->security = G_SUPPLICANT_SECURITY_NONE;
1696                 ap->passphrase = NULL;
1697         } else {
1698                ap->security = G_SUPPLICANT_SECURITY_PSK;
1699                ap->protocol = G_SUPPLICANT_PROTO_RSN;
1700                ap->pairwise_cipher = G_SUPPLICANT_PAIRWISE_CCMP;
1701                ap->group_cipher = G_SUPPLICANT_GROUP_CCMP;
1702                ap->passphrase = passphrase;
1703         }
1704
1705         return ap;
1706 }
1707
1708 static void ap_start_callback(int result, GSupplicantInterface *interface,
1709                                                         void *user_data)
1710 {
1711         struct wifi_tethering_info *info = user_data;
1712
1713         DBG("result %d index %d bridge %s",
1714                 result, info->wifi->index, info->wifi->bridge);
1715
1716         if (result < 0) {
1717                 connman_inet_remove_from_bridge(info->wifi->index,
1718                                                         info->wifi->bridge);
1719                 connman_technology_tethering_notify(info->technology, FALSE);
1720         }
1721
1722         g_free(info->ifname);
1723         g_free(info);
1724 }
1725
1726 static void ap_create_callback(int result,
1727                                 GSupplicantInterface *interface,
1728                                         void *user_data)
1729 {
1730         struct wifi_tethering_info *info = user_data;
1731
1732         DBG("result %d ifname %s", result,
1733                                 g_supplicant_interface_get_ifname(interface));
1734
1735         if (result < 0) {
1736                 connman_inet_remove_from_bridge(info->wifi->index,
1737                                                         info->wifi->bridge);
1738                 connman_technology_tethering_notify(info->technology, FALSE);
1739
1740                 g_free(info->ifname);
1741                 g_free(info);
1742                 return;
1743         }
1744
1745         info->wifi->interface = interface;
1746         g_supplicant_interface_set_data(interface, info->wifi);
1747
1748         if (g_supplicant_interface_set_apscan(interface, 2) < 0)
1749                 connman_error("Failed to set interface ap_scan property");
1750
1751         g_supplicant_interface_connect(interface, info->ssid,
1752                                                 ap_start_callback, info);
1753 }
1754
1755 static void sta_remove_callback(int result,
1756                                 GSupplicantInterface *interface,
1757                                         void *user_data)
1758 {
1759         struct wifi_tethering_info *info = user_data;
1760         const char *driver = connman_option_get_string("wifi");
1761
1762         DBG("ifname %s result %d ", info->ifname, result);
1763
1764         if (result < 0) {
1765                 info->wifi->tethering = TRUE;
1766
1767                 g_free(info->ifname);
1768                 g_free(info);
1769                 return;
1770         }
1771
1772         info->wifi->interface = NULL;
1773
1774         connman_technology_tethering_notify(info->technology, TRUE);
1775
1776         g_supplicant_interface_create(info->ifname, driver, info->wifi->bridge,
1777                                                 ap_create_callback,
1778                                                         info);
1779 }
1780
1781 static int tech_set_tethering(struct connman_technology *technology,
1782                                 const char *identifier, const char *passphrase,
1783                                 const char *bridge, connman_bool_t enabled)
1784 {
1785         GList *list;
1786         GSupplicantInterface *interface;
1787         struct wifi_data *wifi;
1788         struct wifi_tethering_info *info;
1789         const char *ifname;
1790         unsigned int mode;
1791         int err;
1792
1793         DBG("");
1794
1795         if (enabled == FALSE) {
1796                 for (list = iface_list; list; list = list->next) {
1797                         wifi = list->data;
1798
1799                         if (wifi->tethering == TRUE) {
1800                                 wifi->tethering = FALSE;
1801
1802                                 connman_inet_remove_from_bridge(wifi->index,
1803                                                                         bridge);
1804                                 wifi->bridged = FALSE;
1805                         }
1806                 }
1807
1808                 connman_technology_tethering_notify(technology, FALSE);
1809
1810                 return 0;
1811         }
1812
1813         for (list = iface_list; list; list = list->next) {
1814                 wifi = list->data;
1815
1816                 interface = wifi->interface;
1817
1818                 if (interface == NULL)
1819                         continue;
1820
1821                 ifname = g_supplicant_interface_get_ifname(wifi->interface);
1822
1823                 mode = g_supplicant_interface_get_mode(interface);
1824                 if ((mode & G_SUPPLICANT_CAPABILITY_MODE_AP) == 0) {
1825                         DBG("%s does not support AP mode", ifname);
1826                         continue;
1827                 }
1828
1829                 info = g_try_malloc0(sizeof(struct wifi_tethering_info));
1830                 if (info == NULL)
1831                         return -ENOMEM;
1832
1833                 info->wifi = wifi;
1834                 info->technology = technology;
1835                 info->wifi->bridge = bridge;
1836                 info->ssid = ssid_ap_init(identifier, passphrase);
1837                 if (info->ssid == NULL) {
1838                         g_free(info);
1839                         continue;
1840                 }
1841                 info->ifname = g_strdup(ifname);
1842                 if (info->ifname == NULL) {
1843                         g_free(info);
1844                         continue;
1845                 }
1846
1847                 info->wifi->tethering = TRUE;
1848
1849                 err = g_supplicant_interface_remove(interface,
1850                                                 sta_remove_callback,
1851                                                         info);
1852                 if (err == 0)
1853                         return err;
1854         }
1855
1856         return -EOPNOTSUPP;
1857 }
1858
1859 static void regdom_callback(void *user_data)
1860 {
1861         char *alpha2 = user_data;
1862
1863         DBG("");
1864
1865         if (wifi_technology == NULL)
1866                 return;
1867
1868         connman_technology_regdom_notify(wifi_technology, alpha2);
1869 }
1870
1871 static int tech_set_regdom(struct connman_technology *technology, const char *alpha2)
1872 {
1873         return g_supplicant_set_country(alpha2, regdom_callback, alpha2);
1874 }
1875
1876 static struct connman_technology_driver tech_driver = {
1877         .name           = "wifi",
1878         .type           = CONNMAN_SERVICE_TYPE_WIFI,
1879         .probe          = tech_probe,
1880         .remove         = tech_remove,
1881         .set_tethering  = tech_set_tethering,
1882         .set_regdom     = tech_set_regdom,
1883 };
1884
1885 static int wifi_init(void)
1886 {
1887         int err;
1888
1889         err = connman_network_driver_register(&network_driver);
1890         if (err < 0)
1891                 return err;
1892
1893         err = g_supplicant_register(&callbacks);
1894         if (err < 0) {
1895                 connman_network_driver_unregister(&network_driver);
1896                 return err;
1897         }
1898
1899         err = connman_technology_driver_register(&tech_driver);
1900         if (err < 0) {
1901                 g_supplicant_unregister(&callbacks);
1902                 connman_network_driver_unregister(&network_driver);
1903                 return err;
1904         }
1905
1906         return 0;
1907 }
1908
1909 static void wifi_exit(void)
1910 {
1911         DBG();
1912
1913         connman_technology_driver_unregister(&tech_driver);
1914
1915         g_supplicant_unregister(&callbacks);
1916
1917         connman_network_driver_unregister(&network_driver);
1918 }
1919
1920 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
1921                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)