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/service.h>
  51 #include <connman/log.h>
  52 #include <connman/option.h>
  53 #include <connman/storage.h>
  54 #include <include/setting.h>
  55 #include <connman/provision.h>
  56
  57 #include <gsupplicant/gsupplicant.h>
  58
  59 #define CLEANUP_TIMEOUT   8     /* in seconds */
  60 #define INACTIVE_TIMEOUT  12    /* in seconds */
  61 #define MAXIMUM_RETRIES   2
  62 #define FAVORITE_MAXIMUM_RETRIES 4
  63
  64 #define BGSCAN_DEFAULT "simple:30:-45:300"
  65 #define AUTOSCAN_DEFAULT "exponential:3:300"
  66
  67 static struct connman_technology *wifi_technology = NULL;
  68
  69 struct hidden_params {
  70         char ssid[32];
  71         unsigned int ssid_len;
  72         char *identity;
  73         char *passphrase;
  74         gpointer user_data;
  75 };
  76
  77 /**
  78  * Used for autoscan "emulation".
  79  * Should be removed when wpa_s autoscan support will be by default.
  80  */
  81 struct autoscan_params {
  82         int base;
  83         int limit;
  84         int interval;
  85         unsigned int timeout;
  86 };
  87
  88 struct wifi_data {
  89         char *identifier;
  90         struct connman_device *device;
  91         struct connman_network *network;
  92         struct connman_network *pending_network;
  93         GSList *networks;
  94         GSupplicantInterface *interface;
  95         GSupplicantState state;
  96         connman_bool_t connected;
  97         connman_bool_t disconnecting;
  98         connman_bool_t tethering;
  99         connman_bool_t bridged;
 100         const char *bridge;
 101         int index;
 102         unsigned flags;
 103         unsigned int watch;
 104         int retries;
 105         struct hidden_params *hidden;
 106         /**
 107          * autoscan "emulation".
 108          */
 109         struct autoscan_params *autoscan;
 110 };
 111
 112 static GList *iface_list = NULL;
 113
 114 static void start_autoscan(struct connman_device *device);
 115
 116 static void handle_tethering(struct wifi_data *wifi)
 117 {
 118         if (wifi->tethering == FALSE)
 119                 return;
 120
 121         if (wifi->bridge == NULL)
 122                 return;
 123
 124         if (wifi->bridged == TRUE)
 125                 return;
 126
 127         DBG("index %d bridge %s", wifi->index, wifi->bridge);
 128
 129         if (connman_inet_add_to_bridge(wifi->index, wifi->bridge) < 0)
 130                 return;
 131
 132         wifi->bridged = TRUE;
 133 }
 134
 135 static void wifi_newlink(unsigned flags, unsigned change, void *user_data)
 136 {
 137         struct connman_device *device = user_data;
 138         struct wifi_data *wifi = connman_device_get_data(device);
 139
 140         if (wifi == NULL)
 141                 return;
 142
 143         DBG("index %d flags %d change %d", wifi->index, flags, change);
 144
 145         if ((wifi->flags & IFF_UP) != (flags & IFF_UP)) {
 146                 if (flags & IFF_UP)
 147                         DBG("interface up");
 148                 else
 149                         DBG("interface down");
 150         }
 151
 152         if ((wifi->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 153                 if (flags & IFF_LOWER_UP) {
 154                         DBG("carrier on");
 155
 156                         handle_tethering(wifi);
 157                 } else
 158                         DBG("carrier off");
 159         }
 160
 161         wifi->flags = flags;
 162 }
 163
 164 static int wifi_probe(struct connman_device *device)
 165 {
 166         struct wifi_data *wifi;
 167
 168         DBG("device %p", device);
 169
 170         wifi = g_try_new0(struct wifi_data, 1);
 171         if (wifi == NULL)
 172                 return -ENOMEM;
 173
 174         wifi->connected = FALSE;
 175         wifi->disconnecting = FALSE;
 176         wifi->tethering = FALSE;
 177         wifi->bridged = FALSE;
 178         wifi->bridge = NULL;
 179         wifi->state = G_SUPPLICANT_STATE_INACTIVE;
 180
 181         connman_device_set_data(device, wifi);
 182         wifi->device = connman_device_ref(device);
 183
 184         wifi->index = connman_device_get_index(device);
 185         wifi->flags = 0;
 186
 187         wifi->watch = connman_rtnl_add_newlink_watch(wifi->index,
 188                                                         wifi_newlink, device);
 189
 190         iface_list = g_list_append(iface_list, wifi);
 191
 192         return 0;
 193 }
 194
 195 static void remove_networks(struct connman_device *device,
 196                                 struct wifi_data *wifi)
 197 {
 198         GSList *list;
 199
 200         for (list = wifi->networks; list != NULL; list = list->next) {
 201                 struct connman_network *network = list->data;
 202
 203                 connman_device_remove_network(device, network);
 204                 connman_network_unref(network);
 205         }
 206
 207         g_slist_free(wifi->networks);
 208         wifi->networks = NULL;
 209 }
 210
 211 static void reset_autoscan(struct connman_device *device)
 212 {
 213         struct wifi_data *wifi = connman_device_get_data(device);
 214         struct autoscan_params *autoscan;
 215
 216         DBG("");
 217
 218         if (wifi == NULL || wifi->autoscan == NULL)
 219                 return;
 220
 221         autoscan = wifi->autoscan;
 222
 223         if (autoscan->timeout == 0 && autoscan->interval == 0)
 224                 return;
 225
 226         g_source_remove(autoscan->timeout);
 227
 228         autoscan->timeout = 0;
 229         autoscan->interval = 0;
 230
 231         connman_device_unref(device);
 232 }
 233
 234 static void stop_autoscan(struct connman_device *device)
 235 {
 236         reset_autoscan(device);
 237
 238         connman_device_set_scanning(device, FALSE);
 239 }
 240
 241 static void wifi_remove(struct connman_device *device)
 242 {
 243         struct wifi_data *wifi = connman_device_get_data(device);
 244
 245         DBG("device %p wifi %p", device, wifi);
 246
 247         if (wifi == NULL)
 248                 return;
 249
 250         iface_list = g_list_remove(iface_list, wifi);
 251
 252         remove_networks(device, wifi);
 253
 254         connman_device_set_powered(device, FALSE);
 255         connman_device_set_data(device, NULL);
 256         connman_device_unref(wifi->device);
 257         connman_rtnl_remove_watch(wifi->watch);
 258
 259         g_supplicant_interface_set_data(wifi->interface, NULL);
 260
 261         g_free(wifi->autoscan);
 262         g_free(wifi->identifier);
 263         g_free(wifi);
 264 }
 265
 266 static gboolean is_duplicate(GSList *list, gchar *ssid, int ssid_len)
 267 {
 268         GSList *iter;
 269
 270         for (iter = list; iter != NULL; iter = g_slist_next(iter)) {
 271                 struct scan_ssid *scan_ssid = iter->data;
 272
 273                 if (ssid_len == scan_ssid->ssid_len &&
 274                                 memcmp(ssid, scan_ssid->ssid, ssid_len) == 0)
 275                         return TRUE;
 276         }
 277
 278         return FALSE;
 279 }
 280
 281 static int add_scan_param(gchar *hex_ssid, char *raw_ssid, int ssid_len,
 282                         int freq, GSupplicantScanParams *scan_data,
 283                         int driver_max_scan_ssids, char *ssid_name)
 284 {
 285         unsigned int i;
 286         struct scan_ssid *scan_ssid;
 287
 288         if (driver_max_scan_ssids > scan_data->num_ssids &&
 289                         (hex_ssid != NULL || raw_ssid != NULL)) {
 290                 gchar *ssid;
 291                 unsigned int j = 0, hex;
 292
 293                 if (hex_ssid != NULL) {
 294                         size_t hex_ssid_len = strlen(hex_ssid);
 295
 296                         ssid = g_try_malloc0(hex_ssid_len / 2);
 297                         if (ssid == NULL)
 298                                 return -ENOMEM;
 299
 300                         for (i = 0; i < hex_ssid_len; i += 2) {
 301                                 sscanf(hex_ssid + i, "%02x", &hex);
 302                                 ssid[j++] = hex;
 303                         }
 304                 } else {
 305                         ssid = raw_ssid;
 306                         j = ssid_len;
 307                 }
 308
 309                 /*
 310                  * If we have already added hidden AP to the list,
 311                  * then do not do it again. This might happen if you have
 312                  * used or are using multiple wifi cards, so in that case
 313                  * you might have multiple service files for same AP.
 314                  */
 315                 if (is_duplicate(scan_data->ssids, ssid, j) == TRUE)
 316                         return 0;
 317
 318                 scan_ssid = g_try_new(struct scan_ssid, 1);
 319                 if (scan_ssid == NULL) {
 320                         g_free(ssid);
 321                         return -ENOMEM;
 322                 }
 323
 324                 memcpy(scan_ssid->ssid, ssid, j);
 325                 scan_ssid->ssid_len = j;
 326                 scan_data->ssids = g_slist_prepend(scan_data->ssids,
 327                                                                 scan_ssid);
 328
 329                 scan_data->num_ssids++;
 330
 331                 DBG("SSID %s added to scanned list of %d entries", ssid_name,
 332                                                         scan_data->num_ssids);
 333
 334                 if (hex_ssid != NULL)
 335                         g_free(ssid);
 336         } else
 337                 return -EINVAL;
 338
 339         scan_data->ssids = g_slist_reverse(scan_data->ssids);
 340
 341         if (scan_data->freqs == NULL) {
 342                 scan_data->freqs = g_try_malloc0(sizeof(uint16_t) *
 343                                                 scan_data->num_ssids);
 344                 if (scan_data->freqs == NULL) {
 345                         g_slist_free_full(scan_data->ssids, g_free);
 346                         return -ENOMEM;
 347                 }
 348         } else {
 349                 scan_data->freqs = g_try_realloc(scan_data->freqs,
 350                                 sizeof(uint16_t) * scan_data->num_ssids);
 351                 if (scan_data->freqs == NULL) {
 352                         g_slist_free_full(scan_data->ssids, g_free);
 353                         return -ENOMEM;
 354                 }
 355                 scan_data->freqs[scan_data->num_ssids - 1] = 0;
 356         }
 357
 358         /* Don't add duplicate entries */
 359         for (i = 0; i < scan_data->num_ssids; i++) {
 360                 if (scan_data->freqs[i] == 0) {
 361                         scan_data->freqs[i] = freq;
 362                         break;
 363                 } else if (scan_data->freqs[i] == freq)
 364                         break;
 365         }
 366
 367         return 1;
 368 }
 369
 370 static int get_hidden_connections(int max_ssids,
 371                                 GSupplicantScanParams *scan_data)
 372 {
 373         struct connman_config_entry **entries;
 374         GKeyFile *keyfile;
 375         gchar **services;
 376         char *ssid, *name;
 377         int i, freq, ret;
 378         gboolean value;
 379         int num_ssids = 0, add_param_failed = 0;
 380
 381         services = connman_storage_get_services();
 382         for (i = 0; services && services[i]; i++) {
 383                 if (strncmp(services[i], "wifi_", 5) != 0)
 384                         continue;
 385
 386                 keyfile = connman_storage_load_service(services[i]);
 387                 if (keyfile == NULL)
 388                         continue;
 389
 390                 value = g_key_file_get_boolean(keyfile,
 391                                         services[i], "Hidden", NULL);
 392                 if (value == FALSE) {
 393                         g_key_file_free(keyfile);
 394                         continue;
 395                 }
 396
 397                 value = g_key_file_get_boolean(keyfile,
 398                                         services[i], "Favorite", NULL);
 399                 if (value == FALSE) {
 400                         g_key_file_free(keyfile);
 401                         continue;
 402                 }
 403
 404                 ssid = g_key_file_get_string(keyfile,
 405                                         services[i], "SSID", NULL);
 406
 407                 freq = g_key_file_get_integer(keyfile, services[i],
 408                                         "Frequency", NULL);
 409
 410                 name = g_key_file_get_string(keyfile, services[i], "Name",
 411                                                                 NULL);
 412
 413                 ret = add_scan_param(ssid, NULL, 0, freq, scan_data,
 414                                 max_ssids, name);
 415                 if (ret < 0)
 416                         add_param_failed++;
 417                 else if (ret > 0)
 418                         num_ssids++;
 419
 420                 g_free(name);
 421                 g_key_file_free(keyfile);
 422         }
 423
 424         /*
 425          * Check if there are any hidden AP that needs to be provisioned.
 426          */
 427         entries = connman_config_get_entries();
 428         for (i = 0; entries && entries[i]; i++) {
 429                 int len;
 430
 431                 if (entries[i]->hidden == FALSE)
 432                         continue;
 433
 434                 if (entries[i]->ssid == NULL) {
 435                         ssid = entries[i]->name;
 436                         len = strlen(ssid);
 437                 } else {
 438                         ssid = entries[i]->ssid;
 439                         len = entries[i]->ssid_len;
 440                 }
 441
 442                 if (ssid == NULL)
 443                         continue;
 444
 445                 ret = add_scan_param(NULL, ssid, len, 0, scan_data,
 446                                                         max_ssids, ssid);
 447                 if (ret < 0)
 448                         add_param_failed++;
 449                 else if (ret > 0)
 450                         num_ssids++;
 451         }
 452
 453         connman_config_free_entries(entries);
 454
 455         if (add_param_failed > 0)
 456                 DBG("Unable to scan %d out of %d SSIDs (max is %d)",
 457                         add_param_failed, num_ssids, max_ssids);
 458
 459         g_strfreev(services);
 460
 461         return num_ssids > max_ssids ? max_ssids : num_ssids;
 462 }
 463
 464 static int throw_wifi_scan(struct connman_device *device,
 465                         GSupplicantInterfaceCallback callback)
 466 {
 467         struct wifi_data *wifi = connman_device_get_data(device);
 468         int ret;
 469
 470         if (wifi == NULL)
 471                 return -ENODEV;
 472
 473         DBG("device %p %p", device, wifi->interface);
 474
 475         if (wifi->tethering == TRUE)
 476                 return -EBUSY;
 477
 478         if (connman_device_get_scanning(device) == TRUE)
 479                 return -EALREADY;
 480
 481         connman_device_ref(device);
 482
 483         ret = g_supplicant_interface_scan(wifi->interface, NULL,
 484                                                 callback, device);
 485         if (ret == 0)
 486                 connman_device_set_scanning(device, TRUE);
 487         else
 488                 connman_device_unref(device);
 489
 490         return ret;
 491 }
 492
 493 static void hidden_free(struct hidden_params *hidden)
 494 {
 495         if (hidden == NULL)
 496                 return;
 497
 498         g_free(hidden->identity);
 499         g_free(hidden->passphrase);
 500         g_free(hidden);
 501 }
 502
 503 static void scan_callback(int result, GSupplicantInterface *interface,
 504                                                 void *user_data)
 505 {
 506         struct connman_device *device = user_data;
 507         struct wifi_data *wifi = connman_device_get_data(device);
 508
 509         DBG("result %d wifi %p", result, wifi);
 510
 511         if (wifi != NULL && wifi->hidden != NULL) {
 512                 connman_network_clear_hidden(wifi->hidden->user_data);
 513                 hidden_free(wifi->hidden);
 514                 wifi->hidden = NULL;
 515         }
 516
 517         if (result < 0)
 518                 connman_device_reset_scanning(device);
 519
 520         connman_device_set_scanning(device, FALSE);
 521
 522         if (result != -ENOLINK)
 523                 start_autoscan(device);
 524
 525         connman_device_unref(device);
 526 }
 527
 528 static void scan_callback_hidden(int result,
 529                         GSupplicantInterface *interface, void *user_data)
 530 {
 531         struct connman_device *device = user_data;
 532         struct wifi_data *wifi = connman_device_get_data(device);
 533         int driver_max_ssids;
 534
 535         DBG("result %d wifi %p", result, wifi);
 536
 537         if (wifi == NULL)
 538                 goto out;
 539
 540         /*
 541          * Scan hidden networks so that we can autoconnect to them.
 542          */
 543         driver_max_ssids = g_supplicant_interface_get_max_scan_ssids(
 544                                                         wifi->interface);
 545         DBG("max ssids %d", driver_max_ssids);
 546
 547         if (driver_max_ssids > 0) {
 548                 GSupplicantScanParams *scan_params;
 549                 int ret;
 550
 551                 scan_params = g_try_malloc0(sizeof(GSupplicantScanParams));
 552                 if (scan_params == NULL)
 553                         goto out;
 554
 555                 if (get_hidden_connections(driver_max_ssids,
 556                                                 scan_params) > 0) {
 557                         ret = g_supplicant_interface_scan(wifi->interface,
 558                                                         scan_params,
 559                                                         scan_callback,
 560                                                         device);
 561                         if (ret == 0)
 562                                 return;
 563                 }
 564
 565                 g_supplicant_free_scan_params(scan_params);
 566         }
 567
 568 out:
 569         scan_callback(result, interface, user_data);
 570 }
 571
 572 static gboolean autoscan_timeout(gpointer data)
 573 {
 574         struct connman_device *device = data;
 575         struct wifi_data *wifi = connman_device_get_data(device);
 576         struct autoscan_params *autoscan;
 577         int interval;
 578
 579         if (wifi == NULL)
 580                 return FALSE;
 581
 582         autoscan = wifi->autoscan;
 583
 584         if (autoscan->interval <= 0) {
 585                 interval = autoscan->base;
 586                 goto set_interval;
 587         } else
 588                 interval = autoscan->interval * autoscan->base;
 589
 590         if (autoscan->interval >= autoscan->limit)
 591                 interval = autoscan->limit;
 592
 593         throw_wifi_scan(wifi->device, scan_callback_hidden);
 594
 595 set_interval:
 596         DBG("interval %d", interval);
 597
 598         autoscan->interval = interval;
 599
 600         autoscan->timeout = g_timeout_add_seconds(interval,
 601                                                 autoscan_timeout, device);
 602
 603         return FALSE;
 604 }
 605
 606 static void start_autoscan(struct connman_device *device)
 607 {
 608         struct wifi_data *wifi = connman_device_get_data(device);
 609         struct autoscan_params *autoscan;
 610
 611         DBG("");
 612
 613         if (wifi == NULL)
 614                 return;
 615
 616         autoscan = wifi->autoscan;
 617         if (autoscan == NULL)
 618                 return;
 619
 620         if (autoscan->timeout > 0 || autoscan->interval > 0)
 621                 return;
 622
 623         connman_device_ref(device);
 624
 625         autoscan_timeout(device);
 626 }
 627
 628 static struct autoscan_params *parse_autoscan_params(const char *params)
 629 {
 630         struct autoscan_params *autoscan;
 631         char **list_params;
 632         int limit;
 633         int base;
 634
 635         DBG("Emulating autoscan");
 636
 637         list_params = g_strsplit(params, ":", 0);
 638         if (list_params == 0)
 639                 return NULL;
 640
 641         if (g_strv_length(list_params) < 3) {
 642                 g_strfreev(list_params);
 643                 return NULL;
 644         }
 645
 646         base = atoi(list_params[1]);
 647         limit = atoi(list_params[2]);
 648
 649         g_strfreev(list_params);
 650
 651         autoscan = g_try_malloc0(sizeof(struct autoscan_params));
 652         if (autoscan == NULL) {
 653                 DBG("Could not allocate memory for autoscan");
 654                 return NULL;
 655         }
 656
 657         DBG("base %d - limit %d", base, limit);
 658         autoscan->base = base;
 659         autoscan->limit = limit;
 660
 661         return autoscan;
 662 }
 663
 664 static void setup_autoscan(struct wifi_data *wifi)
 665 {
 666         if (wifi->autoscan == NULL)
 667                 wifi->autoscan = parse_autoscan_params(AUTOSCAN_DEFAULT);
 668
 669         start_autoscan(wifi->device);
 670 }
 671
 672 static void interface_autoscan_callback(int result,
 673                                         GSupplicantInterface *interface,
 674                                                         void *user_data)
 675 {
 676         struct wifi_data *wifi = user_data;
 677
 678         if (result < 0) {
 679                 DBG("Could not enable Autoscan, falling back...");
 680                 setup_autoscan(wifi);
 681         }
 682 }
 683
 684 static void interface_create_callback(int result,
 685                                         GSupplicantInterface *interface,
 686                                                         void *user_data)
 687 {
 688         struct wifi_data *wifi = user_data;
 689
 690         DBG("result %d ifname %s, wifi %p", result,
 691                                 g_supplicant_interface_get_ifname(interface),
 692                                 wifi);
 693
 694         if (result < 0 || wifi == NULL)
 695                 return;
 696
 697         wifi->interface = interface;
 698         g_supplicant_interface_set_data(interface, wifi);
 699
 700         if (g_supplicant_interface_get_ready(interface) == FALSE)
 701                 return;
 702
 703         DBG("interface is ready wifi %p tethering %d", wifi, wifi->tethering);
 704
 705         if (wifi->device == NULL) {
 706                 connman_error("WiFi device not set");
 707                 return;
 708         }
 709
 710         connman_device_set_powered(wifi->device, TRUE);
 711
 712         if (connman_setting_get_bool("BackgroundScanning") == FALSE)
 713                 return;
 714
 715         /* Setting up automatic scanning */
 716         if (g_supplicant_interface_autoscan(interface, AUTOSCAN_DEFAULT,
 717                                 interface_autoscan_callback, wifi) < 0) {
 718                 DBG("Could not enable Autoscan, falling back...");
 719                 setup_autoscan(wifi);
 720         }
 721 }
 722
 723 static int wifi_enable(struct connman_device *device)
 724 {
 725         struct wifi_data *wifi = connman_device_get_data(device);
 726         const char *interface = connman_device_get_string(device, "Interface");
 727         const char *driver = connman_option_get_string("wifi");
 728         int ret;
 729
 730         DBG("device %p %p", device, wifi);
 731
 732         if (wifi == NULL)
 733                 return -ENODEV;
 734
 735         ret = g_supplicant_interface_create(interface, driver, NULL,
 736                                                 interface_create_callback,
 737                                                         wifi);
 738         if (ret < 0)
 739                 return ret;
 740
 741         return -EINPROGRESS;
 742 }
 743
 744 static int wifi_disable(struct connman_device *device)
 745 {
 746         struct wifi_data *wifi = connman_device_get_data(device);
 747         int ret;
 748
 749         DBG("device %p wifi %p", device, wifi);
 750
 751         if (wifi == NULL)
 752                 return -ENODEV;
 753
 754         wifi->connected = FALSE;
 755         wifi->disconnecting = FALSE;
 756
 757         if (wifi->pending_network != NULL)
 758                 wifi->pending_network = NULL;
 759
 760         stop_autoscan(device);
 761
 762         /* In case of a user scan, device is still referenced */
 763         if (connman_device_get_scanning(device) == TRUE) {
 764                 connman_device_set_scanning(device, FALSE);
 765                 connman_device_unref(wifi->device);
 766         }
 767
 768         remove_networks(device, wifi);
 769
 770         ret = g_supplicant_interface_remove(wifi->interface, NULL, NULL);
 771         if (ret < 0)
 772                 return ret;
 773
 774         return -EINPROGRESS;
 775 }
 776
 777 struct last_connected {
 778         GTimeVal modified;
 779         gchar *ssid;
 780         int freq;
 781 };
 782
 783 static gint sort_entry(gconstpointer a, gconstpointer b, gpointer user_data)
 784 {
 785         GTimeVal *aval = (GTimeVal *)a;
 786         GTimeVal *bval = (GTimeVal *)b;
 787
 788         /* Note that the sort order is descending */
 789         if (aval->tv_sec < bval->tv_sec)
 790                 return 1;
 791
 792         if (aval->tv_sec > bval->tv_sec)
 793                 return -1;
 794
 795         return 0;
 796 }
 797
 798 static void free_entry(gpointer data)
 799 {
 800         struct last_connected *entry = data;
 801
 802         g_free(entry->ssid);
 803         g_free(entry);
 804 }
 805
 806 static int get_latest_connections(int max_ssids,
 807                                 GSupplicantScanParams *scan_data)
 808 {
 809         GSequenceIter *iter;
 810         GSequence *latest_list;
 811         struct last_connected *entry;
 812         GKeyFile *keyfile;
 813         GTimeVal modified;
 814         gchar **services;
 815         gchar *str;
 816         char *ssid;
 817         int i, freq;
 818         int num_ssids = 0;
 819
 820         latest_list = g_sequence_new(free_entry);
 821         if (latest_list == NULL)
 822                 return -ENOMEM;
 823
 824         services = connman_storage_get_services();
 825         for (i = 0; services && services[i]; i++) {
 826                 if (strncmp(services[i], "wifi_", 5) != 0)
 827                         continue;
 828
 829                 keyfile = connman_storage_load_service(services[i]);
 830                 if (keyfile == NULL)
 831                         continue;
 832
 833                 str = g_key_file_get_string(keyfile,
 834                                         services[i], "Favorite", NULL);
 835                 if (str == NULL || g_strcmp0(str, "true")) {
 836                         if (str)
 837                                 g_free(str);
 838                         g_key_file_free(keyfile);
 839                         continue;
 840                 }
 841                 g_free(str);
 842
 843                 str = g_key_file_get_string(keyfile,
 844                                         services[i], "AutoConnect", NULL);
 845                 if (str == NULL || g_strcmp0(str, "true")) {
 846                         if (str)
 847                                 g_free(str);
 848                         g_key_file_free(keyfile);
 849                         continue;
 850                 }
 851                 g_free(str);
 852
 853                 str = g_key_file_get_string(keyfile,
 854                                         services[i], "Modified", NULL);
 855                 if (str != NULL) {
 856                         g_time_val_from_iso8601(str, &modified);
 857                         g_free(str);
 858                 }
 859
 860                 ssid = g_key_file_get_string(keyfile,
 861                                         services[i], "SSID", NULL);
 862
 863                 freq = g_key_file_get_integer(keyfile, services[i],
 864                                         "Frequency", NULL);
 865                 if (freq) {
 866                         entry = g_try_new(struct last_connected, 1);
 867                         if (entry == NULL) {
 868                                 g_sequence_free(latest_list);
 869                                 g_key_file_free(keyfile);
 870                                 g_free(ssid);
 871                                 return -ENOMEM;
 872                         }
 873
 874                         entry->ssid = ssid;
 875                         entry->modified = modified;
 876                         entry->freq = freq;
 877
 878                         g_sequence_insert_sorted(latest_list, entry,
 879                                                 sort_entry, NULL);
 880                         num_ssids++;
 881                 } else
 882                         g_free(ssid);
 883
 884                 g_key_file_free(keyfile);
 885         }
 886
 887         g_strfreev(services);
 888
 889         num_ssids = num_ssids > max_ssids ? max_ssids : num_ssids;
 890
 891         iter = g_sequence_get_begin_iter(latest_list);
 892
 893         for (i = 0; i < num_ssids; i++) {
 894                 entry = g_sequence_get(iter);
 895
 896                 DBG("ssid %s freq %d modified %lu", entry->ssid, entry->freq,
 897                                                 entry->modified.tv_sec);
 898
 899                 add_scan_param(entry->ssid, NULL, 0, entry->freq, scan_data,
 900                                                 max_ssids, entry->ssid);
 901
 902                 iter = g_sequence_iter_next(iter);
 903         }
 904
 905         g_sequence_free(latest_list);
 906         return num_ssids;
 907 }
 908
 909 static int wifi_scan_simple(struct connman_device *device)
 910 {
 911         reset_autoscan(device);
 912
 913         return throw_wifi_scan(device, scan_callback_hidden);
 914 }
 915
 916 /*
 917  * Note that the hidden scan is only used when connecting to this specific
 918  * hidden AP first time. It is not used when system autoconnects to hidden AP.
 919  */
 920 static int wifi_scan(struct connman_device *device,
 921                 const char *ssid, unsigned int ssid_len,
 922                 const char *identity, const char* passphrase,
 923                 gpointer user_data)
 924 {
 925         struct wifi_data *wifi = connman_device_get_data(device);
 926         GSupplicantScanParams *scan_params = NULL;
 927         struct scan_ssid *scan_ssid;
 928         struct hidden_params *hidden;
 929         int ret;
 930         int driver_max_ssids = 0;
 931         connman_bool_t do_hidden;
 932
 933         if (wifi == NULL)
 934                 return -ENODEV;
 935
 936         DBG("device %p wifi %p hidden ssid %s", device, wifi->interface, ssid);
 937
 938         if (wifi->tethering == TRUE)
 939                 return 0;
 940
 941         if (connman_device_get_scanning(device) == TRUE)
 942                 return -EALREADY;
 943
 944         if (ssid == NULL || ssid_len == 0 || ssid_len > 32) {
 945                 do_hidden = FALSE;
 946         } else {
 947                 if (wifi->hidden != NULL)
 948                         return -EBUSY;
 949
 950                 do_hidden = TRUE;
 951         }
 952
 953         if (do_hidden == FALSE) {
 954                 driver_max_ssids = g_supplicant_interface_get_max_scan_ssids(
 955                                                         wifi->interface);
 956                 DBG("max ssids %d", driver_max_ssids);
 957                 if (driver_max_ssids == 0)
 958                         return wifi_scan_simple(device);
 959         }
 960
 961         scan_params = g_try_malloc0(sizeof(GSupplicantScanParams));
 962         if (scan_params == NULL)
 963                 return -ENOMEM;
 964
 965         if (do_hidden == TRUE) {
 966                 scan_ssid = g_try_new(struct scan_ssid, 1);
 967                 if (scan_ssid == NULL) {
 968                         g_free(scan_params);
 969                         return -ENOMEM;
 970                 }
 971
 972                 memcpy(scan_ssid->ssid, ssid, ssid_len);
 973                 scan_ssid->ssid_len = ssid_len;
 974                 scan_params->ssids = g_slist_prepend(scan_params->ssids,
 975                                                                 scan_ssid);
 976                 scan_params->num_ssids = 1;
 977
 978                 hidden = g_try_new0(struct hidden_params, 1);
 979                 if (hidden == NULL) {
 980                         g_free(scan_params);
 981                         return -ENOMEM;
 982                 }
 983
 984                 memcpy(hidden->ssid, ssid, ssid_len);
 985                 hidden->ssid_len = ssid_len;
 986                 hidden->identity = g_strdup(identity);
 987                 hidden->passphrase = g_strdup(passphrase);
 988                 hidden->user_data = user_data;
 989                 wifi->hidden = hidden;
 990
 991         } else {
 992                 ret = get_latest_connections(driver_max_ssids, scan_params);
 993                 if (ret <= 0) {
 994                         g_supplicant_free_scan_params(scan_params);
 995                         return wifi_scan_simple(device);
 996                 }
 997         }
 998
 999         connman_device_ref(device);
1000
1001         reset_autoscan(device);
1002
1003         ret = g_supplicant_interface_scan(wifi->interface, scan_params,
1004                                                 scan_callback, device);
1005         if (ret == 0)
1006                 connman_device_set_scanning(device, TRUE);
1007         else {
1008                 g_supplicant_free_scan_params(scan_params);
1009                 connman_device_unref(device);
1010
1011                 if (do_hidden == TRUE) {
1012                         hidden_free(wifi->hidden);
1013                         wifi->hidden = NULL;
1014                 }
1015         }
1016
1017         return ret;
1018 }
1019
1020 static void wifi_regdom_callback(int result,
1021                                         const char *alpha2,
1022                                                 void *user_data)
1023 {
1024         struct connman_device *device = user_data;
1025
1026         connman_device_regdom_notify(device, result, alpha2);
1027
1028         connman_device_unref(device);
1029 }
1030
1031 static int wifi_set_regdom(struct connman_device *device, const char *alpha2)
1032 {
1033         struct wifi_data *wifi = connman_device_get_data(device);
1034         int ret;
1035
1036         if (wifi == NULL)
1037                 return -EINVAL;
1038
1039         connman_device_ref(device);
1040
1041         ret = g_supplicant_interface_set_country(wifi->interface,
1042                                                 wifi_regdom_callback,
1043                                                         alpha2, device);
1044         if (ret != 0)
1045                 connman_device_unref(device);
1046
1047         return ret;
1048 }
1049
1050 static struct connman_device_driver wifi_ng_driver = {
1051         .name           = "wifi",
1052         .type           = CONNMAN_DEVICE_TYPE_WIFI,
1053         .priority       = CONNMAN_DEVICE_PRIORITY_LOW,
1054         .probe          = wifi_probe,
1055         .remove         = wifi_remove,
1056         .enable         = wifi_enable,
1057         .disable        = wifi_disable,
1058         .scan           = wifi_scan,
1059         .set_regdom     = wifi_set_regdom,
1060 };
1061
1062 static void system_ready(void)
1063 {
1064         DBG("");
1065
1066         if (connman_device_driver_register(&wifi_ng_driver) < 0)
1067                 connman_error("Failed to register WiFi driver");
1068 }
1069
1070 static void system_killed(void)
1071 {
1072         DBG("");
1073
1074         connman_device_driver_unregister(&wifi_ng_driver);
1075 }
1076
1077 static int network_probe(struct connman_network *network)
1078 {
1079         DBG("network %p", network);
1080
1081         return 0;
1082 }
1083
1084 static void network_remove(struct connman_network *network)
1085 {
1086         struct connman_device *device = connman_network_get_device(network);
1087         struct wifi_data *wifi;
1088
1089         DBG("network %p", network);
1090
1091         wifi = connman_device_get_data(device);
1092         if (wifi == NULL)
1093                 return;
1094
1095         if (wifi->network != network)
1096                 return;
1097
1098         wifi->network = NULL;
1099 }
1100
1101 static void connect_callback(int result, GSupplicantInterface *interface,
1102                                                         void *user_data)
1103 {
1104         struct connman_network *network = user_data;
1105
1106         DBG("network %p result %d", network, result);
1107
1108         if (result == -ENOKEY) {
1109                 connman_network_set_error(network,
1110                                         CONNMAN_NETWORK_ERROR_INVALID_KEY);
1111         } else if (result < 0) {
1112                 connman_network_set_error(network,
1113                                         CONNMAN_NETWORK_ERROR_CONFIGURE_FAIL);
1114         }
1115 }
1116
1117 static GSupplicantSecurity network_security(const char *security)
1118 {
1119         if (g_str_equal(security, "none") == TRUE)
1120                 return G_SUPPLICANT_SECURITY_NONE;
1121         else if (g_str_equal(security, "wep") == TRUE)
1122                 return G_SUPPLICANT_SECURITY_WEP;
1123         else if (g_str_equal(security, "psk") == TRUE)
1124                 return G_SUPPLICANT_SECURITY_PSK;
1125         else if (g_str_equal(security, "wpa") == TRUE)
1126                 return G_SUPPLICANT_SECURITY_PSK;
1127         else if (g_str_equal(security, "rsn") == TRUE)
1128                 return G_SUPPLICANT_SECURITY_PSK;
1129         else if (g_str_equal(security, "ieee8021x") == TRUE)
1130                 return G_SUPPLICANT_SECURITY_IEEE8021X;
1131
1132         return G_SUPPLICANT_SECURITY_UNKNOWN;
1133 }
1134
1135 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
1136 {
1137         const char *security, *passphrase, *agent_passphrase;
1138
1139         memset(ssid, 0, sizeof(*ssid));
1140         ssid->mode = G_SUPPLICANT_MODE_INFRA;
1141         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
1142                                                 &ssid->ssid_len);
1143         ssid->scan_ssid = 1;
1144         security = connman_network_get_string(network, "WiFi.Security");
1145         ssid->security = network_security(security);
1146         passphrase = connman_network_get_string(network,
1147                                                 "WiFi.Passphrase");
1148         if (passphrase == NULL || strlen(passphrase) == 0) {
1149
1150                 /* Use agent provided passphrase as a fallback */
1151                 agent_passphrase = connman_network_get_string(network,
1152                                                 "WiFi.AgentPassphrase");
1153
1154                 if (agent_passphrase == NULL || strlen(agent_passphrase) == 0)
1155                         ssid->passphrase = NULL;
1156                 else
1157                         ssid->passphrase = agent_passphrase;
1158         } else
1159                 ssid->passphrase = passphrase;
1160
1161         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
1162
1163         /*
1164          * If our private key password is unset,
1165          * we use the supplied passphrase. That is needed
1166          * for PEAP where 2 passphrases (identity and client
1167          * cert may have to be provided.
1168          */
1169         if (connman_network_get_string(network,
1170                                         "WiFi.PrivateKeyPassphrase") == NULL)
1171                 connman_network_set_string(network,
1172                                                 "WiFi.PrivateKeyPassphrase",
1173                                                 ssid->passphrase);
1174         /* We must have an identity for both PEAP and TLS */
1175         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
1176
1177         /* Use agent provided identity as a fallback */
1178         if (ssid->identity == NULL || strlen(ssid->identity) == 0)
1179                 ssid->identity = connman_network_get_string(network,
1180                                                         "WiFi.AgentIdentity");
1181
1182         ssid->ca_cert_path = connman_network_get_string(network,
1183                                                         "WiFi.CACertFile");
1184         ssid->client_cert_path = connman_network_get_string(network,
1185                                                         "WiFi.ClientCertFile");
1186         ssid->private_key_path = connman_network_get_string(network,
1187                                                         "WiFi.PrivateKeyFile");
1188         ssid->private_key_passphrase = connman_network_get_string(network,
1189                                                 "WiFi.PrivateKeyPassphrase");
1190         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
1191
1192         ssid->use_wps = connman_network_get_bool(network, "WiFi.UseWPS");
1193         ssid->pin_wps = connman_network_get_string(network, "WiFi.PinWPS");
1194
1195         if (connman_setting_get_bool("BackgroundScanning") == TRUE)
1196                 ssid->bgscan = BGSCAN_DEFAULT;
1197 }
1198
1199 static int network_connect(struct connman_network *network)
1200 {
1201         struct connman_device *device = connman_network_get_device(network);
1202         struct wifi_data *wifi;
1203         GSupplicantInterface *interface;
1204         GSupplicantSSID *ssid;
1205
1206         DBG("network %p", network);
1207
1208         if (device == NULL)
1209                 return -ENODEV;
1210
1211         wifi = connman_device_get_data(device);
1212         if (wifi == NULL)
1213                 return -ENODEV;
1214
1215         ssid = g_try_malloc0(sizeof(GSupplicantSSID));
1216         if (ssid == NULL)
1217                 return -ENOMEM;
1218
1219         interface = wifi->interface;
1220
1221         ssid_init(ssid, network);
1222
1223         if (wifi->disconnecting == TRUE)
1224                 wifi->pending_network = network;
1225         else {
1226                 wifi->network = network;
1227                 wifi->retries = 0;
1228
1229                 return g_supplicant_interface_connect(interface, ssid,
1230                                                 connect_callback, network);
1231         }
1232
1233         return -EINPROGRESS;
1234 }
1235
1236 static void disconnect_callback(int result, GSupplicantInterface *interface,
1237                                                                 void *user_data)
1238 {
1239         struct wifi_data *wifi = user_data;
1240
1241         DBG("result %d supplicant interface %p wifi %p",
1242                         result, interface, wifi);
1243
1244         if (result == -ECONNABORTED) {
1245                 DBG("wifi interface no longer available");
1246                 return;
1247         }
1248
1249         if (wifi->network != NULL) {
1250                 /*
1251                  * if result < 0 supplican return an error because
1252                  * the network is not current.
1253                  * we wont receive G_SUPPLICANT_STATE_DISCONNECTED since it
1254                  * failed, call connman_network_set_connected to report
1255                  * disconnect is completed.
1256                  */
1257                 if (result < 0)
1258                         connman_network_set_connected(wifi->network, FALSE);
1259         }
1260
1261         wifi->network = NULL;
1262
1263         wifi->disconnecting = FALSE;
1264
1265         if (wifi->pending_network != NULL) {
1266                 network_connect(wifi->pending_network);
1267                 wifi->pending_network = NULL;
1268         }
1269
1270         start_autoscan(wifi->device);
1271 }
1272
1273 static int network_disconnect(struct connman_network *network)
1274 {
1275         struct connman_device *device = connman_network_get_device(network);
1276         struct wifi_data *wifi;
1277         int err;
1278
1279         DBG("network %p", network);
1280
1281         wifi = connman_device_get_data(device);
1282         if (wifi == NULL || wifi->interface == NULL)
1283                 return -ENODEV;
1284
1285         connman_network_set_associating(network, FALSE);
1286
1287         if (wifi->disconnecting == TRUE)
1288                 return -EALREADY;
1289
1290         wifi->disconnecting = TRUE;
1291
1292         err = g_supplicant_interface_disconnect(wifi->interface,
1293                                                 disconnect_callback, wifi);
1294         if (err < 0)
1295                 wifi->disconnecting = FALSE;
1296
1297         return err;
1298 }
1299
1300 static struct connman_network_driver network_driver = {
1301         .name           = "wifi",
1302         .type           = CONNMAN_NETWORK_TYPE_WIFI,
1303         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
1304         .probe          = network_probe,
1305         .remove         = network_remove,
1306         .connect        = network_connect,
1307         .disconnect     = network_disconnect,
1308 };
1309
1310 static void interface_added(GSupplicantInterface *interface)
1311 {
1312         const char *ifname = g_supplicant_interface_get_ifname(interface);
1313         const char *driver = g_supplicant_interface_get_driver(interface);
1314         struct wifi_data *wifi;
1315
1316         wifi = g_supplicant_interface_get_data(interface);
1317
1318         /*
1319          * We can get here with a NULL wifi pointer when
1320          * the interface added signal is sent before the
1321          * interface creation callback is called.
1322          */
1323         if (wifi == NULL)
1324                 return;
1325
1326         DBG("ifname %s driver %s wifi %p tethering %d",
1327                         ifname, driver, wifi, wifi->tethering);
1328
1329         if (wifi->device == NULL) {
1330                 connman_error("WiFi device not set");
1331                 return;
1332         }
1333
1334         connman_device_set_powered(wifi->device, TRUE);
1335
1336         if (wifi->tethering == TRUE)
1337                 return;
1338 }
1339
1340 static connman_bool_t is_idle(struct wifi_data *wifi)
1341 {
1342         DBG("state %d", wifi->state);
1343
1344         switch (wifi->state) {
1345         case G_SUPPLICANT_STATE_UNKNOWN:
1346         case G_SUPPLICANT_STATE_DISABLED:
1347         case G_SUPPLICANT_STATE_DISCONNECTED:
1348         case G_SUPPLICANT_STATE_INACTIVE:
1349         case G_SUPPLICANT_STATE_SCANNING:
1350                 return TRUE;
1351
1352         case G_SUPPLICANT_STATE_AUTHENTICATING:
1353         case G_SUPPLICANT_STATE_ASSOCIATING:
1354         case G_SUPPLICANT_STATE_ASSOCIATED:
1355         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1356         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1357         case G_SUPPLICANT_STATE_COMPLETED:
1358                 return FALSE;
1359         }
1360
1361         return FALSE;
1362 }
1363
1364 static connman_bool_t is_idle_wps(GSupplicantInterface *interface,
1365                                                 struct wifi_data *wifi)
1366 {
1367         /* First, let's check if WPS processing did not went wrong */
1368         if (g_supplicant_interface_get_wps_state(interface) ==
1369                 G_SUPPLICANT_WPS_STATE_FAIL)
1370                 return FALSE;
1371
1372         /* Unlike normal connection, being associated while processing wps
1373          * actually means that we are idling. */
1374         switch (wifi->state) {
1375         case G_SUPPLICANT_STATE_UNKNOWN:
1376         case G_SUPPLICANT_STATE_DISABLED:
1377         case G_SUPPLICANT_STATE_DISCONNECTED:
1378         case G_SUPPLICANT_STATE_INACTIVE:
1379         case G_SUPPLICANT_STATE_SCANNING:
1380         case G_SUPPLICANT_STATE_ASSOCIATED:
1381                 return TRUE;
1382         case G_SUPPLICANT_STATE_AUTHENTICATING:
1383         case G_SUPPLICANT_STATE_ASSOCIATING:
1384         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1385         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1386         case G_SUPPLICANT_STATE_COMPLETED:
1387                 return FALSE;
1388         }
1389
1390         return FALSE;
1391 }
1392
1393 static connman_bool_t handle_wps_completion(GSupplicantInterface *interface,
1394                                         struct connman_network *network,
1395                                         struct connman_device *device,
1396                                         struct wifi_data *wifi)
1397 {
1398         connman_bool_t wps;
1399
1400         wps = connman_network_get_bool(network, "WiFi.UseWPS");
1401         if (wps == TRUE) {
1402                 const unsigned char *ssid, *wps_ssid;
1403                 unsigned int ssid_len, wps_ssid_len;
1404                 const char *wps_key;
1405
1406                 /* Checking if we got associated with requested
1407                  * network */
1408                 ssid = connman_network_get_blob(network, "WiFi.SSID",
1409                                                 &ssid_len);
1410
1411                 wps_ssid = g_supplicant_interface_get_wps_ssid(
1412                         interface, &wps_ssid_len);
1413
1414                 if (wps_ssid == NULL || wps_ssid_len != ssid_len ||
1415                                 memcmp(ssid, wps_ssid, ssid_len) != 0) {
1416                         connman_network_set_associating(network, FALSE);
1417                         g_supplicant_interface_disconnect(wifi->interface,
1418                                                 disconnect_callback, wifi);
1419                         return FALSE;
1420                 }
1421
1422                 wps_key = g_supplicant_interface_get_wps_key(interface);
1423                 connman_network_set_string(network, "WiFi.Passphrase",
1424                                         wps_key);
1425
1426                 connman_network_set_string(network, "WiFi.PinWPS", NULL);
1427         }
1428
1429         return TRUE;
1430 }
1431
1432 static connman_bool_t handle_4way_handshake_failure(GSupplicantInterface *interface,
1433                                         struct connman_network *network,
1434                                         struct wifi_data *wifi)
1435 {
1436         struct connman_service *service;
1437
1438         if (wifi->state != G_SUPPLICANT_STATE_4WAY_HANDSHAKE)
1439                 return FALSE;
1440
1441         service = connman_service_lookup_from_network(network);
1442         if (service == NULL)
1443                 return FALSE;
1444
1445         wifi->retries++;
1446
1447         if (connman_service_get_favorite(service) == TRUE) {
1448                 if (wifi->retries < FAVORITE_MAXIMUM_RETRIES)
1449                         return TRUE;
1450         } else if (wifi->retries < MAXIMUM_RETRIES)
1451                 return TRUE;
1452
1453         connman_network_set_error(network, CONNMAN_NETWORK_ERROR_INVALID_KEY);
1454
1455         return FALSE;
1456 }
1457
1458 static void interface_state(GSupplicantInterface *interface)
1459 {
1460         struct connman_network *network;
1461         struct connman_device *device;
1462         struct wifi_data *wifi;
1463         GSupplicantState state = g_supplicant_interface_get_state(interface);
1464         connman_bool_t wps;
1465
1466         wifi = g_supplicant_interface_get_data(interface);
1467
1468         DBG("wifi %p interface state %d", wifi, state);
1469
1470         if (wifi == NULL)
1471                 return;
1472
1473         network = wifi->network;
1474         device = wifi->device;
1475
1476         if (device == NULL || network == NULL)
1477                 return;
1478
1479         switch (state) {
1480         case G_SUPPLICANT_STATE_SCANNING:
1481                 break;
1482
1483         case G_SUPPLICANT_STATE_AUTHENTICATING:
1484         case G_SUPPLICANT_STATE_ASSOCIATING:
1485                 stop_autoscan(device);
1486
1487                 if (wifi->connected == FALSE)
1488                         connman_network_set_associating(network, TRUE);
1489
1490                 break;
1491
1492         case G_SUPPLICANT_STATE_COMPLETED:
1493                 /* though it should be already stopped: */
1494                 stop_autoscan(device);
1495
1496                 if (handle_wps_completion(interface, network, device, wifi) ==
1497                                                                         FALSE)
1498                         break;
1499
1500                 connman_network_set_connected(network, TRUE);
1501                 break;
1502
1503         case G_SUPPLICANT_STATE_DISCONNECTED:
1504                 /*
1505                  * If we're in one of the idle modes, we have
1506                  * not started association yet and thus setting
1507                  * those ones to FALSE could cancel an association
1508                  * in progress.
1509                  */
1510                 wps = connman_network_get_bool(network, "WiFi.UseWPS");
1511                 if (wps == TRUE)
1512                         if (is_idle_wps(interface, wifi) == TRUE)
1513                                 break;
1514
1515                 if (is_idle(wifi))
1516                         break;
1517
1518                 /* If previous state was 4way-handshake, then
1519                  * it's either: psk was incorrect and thus we retry
1520                  * or if we reach the maximum retries we declare the
1521                  * psk as wrong */
1522                 if (handle_4way_handshake_failure(interface,
1523                                                 network, wifi) == TRUE)
1524                         break;
1525
1526                 /* We disable the selected network, if not then
1527                  * wpa_supplicant will loop retrying */
1528                 if (g_supplicant_interface_enable_selected_network(interface,
1529                                                 FALSE) != 0)
1530                         DBG("Could not disables selected network");
1531
1532                 connman_network_set_connected(network, FALSE);
1533                 connman_network_set_associating(network, FALSE);
1534                 wifi->disconnecting = FALSE;
1535
1536                 start_autoscan(device);
1537
1538                 break;
1539
1540         case G_SUPPLICANT_STATE_INACTIVE:
1541                 connman_network_set_associating(network, FALSE);
1542                 start_autoscan(device);
1543
1544                 break;
1545
1546         case G_SUPPLICANT_STATE_UNKNOWN:
1547         case G_SUPPLICANT_STATE_DISABLED:
1548         case G_SUPPLICANT_STATE_ASSOCIATED:
1549         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1550         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1551                 break;
1552         }
1553
1554         wifi->state = state;
1555
1556         /* Saving wpa_s state policy:
1557          * If connected and if the state changes are roaming related:
1558          * --> We stay connected
1559          * If completed
1560          * --> We are connected
1561          * All other case:
1562          * --> We are not connected
1563          * */
1564         switch (state) {
1565         case G_SUPPLICANT_STATE_AUTHENTICATING:
1566         case G_SUPPLICANT_STATE_ASSOCIATING:
1567         case G_SUPPLICANT_STATE_ASSOCIATED:
1568         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1569         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1570                 if (wifi->connected == TRUE)
1571                         connman_warn("Probably roaming right now!"
1572                                                 " Staying connected...");
1573                 else
1574                         wifi->connected = FALSE;
1575                 break;
1576         case G_SUPPLICANT_STATE_COMPLETED:
1577                 wifi->connected = TRUE;
1578                 break;
1579         default:
1580                 wifi->connected = FALSE;
1581                 break;
1582         }
1583
1584         DBG("DONE");
1585 }
1586
1587 static void interface_removed(GSupplicantInterface *interface)
1588 {
1589         const char *ifname = g_supplicant_interface_get_ifname(interface);
1590         struct wifi_data *wifi;
1591
1592         DBG("ifname %s", ifname);
1593
1594         wifi = g_supplicant_interface_get_data(interface);
1595
1596         if (wifi != NULL && wifi->tethering == TRUE)
1597                 return;
1598
1599         if (wifi == NULL || wifi->device == NULL) {
1600                 DBG("wifi interface already removed");
1601                 return;
1602         }
1603
1604         wifi->interface = NULL;
1605         connman_device_set_powered(wifi->device, FALSE);
1606 }
1607
1608 static void scan_started(GSupplicantInterface *interface)
1609 {
1610         DBG("");
1611 }
1612
1613 static void scan_finished(GSupplicantInterface *interface)
1614 {
1615         DBG("");
1616 }
1617
1618 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
1619 {
1620         unsigned char strength;
1621
1622         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
1623         if (strength > 100)
1624                 strength = 100;
1625
1626         return strength;
1627 }
1628
1629 static void network_added(GSupplicantNetwork *supplicant_network)
1630 {
1631         struct connman_network *network;
1632         GSupplicantInterface *interface;
1633         struct wifi_data *wifi;
1634         const char *name, *identifier, *security, *group, *mode;
1635         const unsigned char *ssid;
1636         unsigned int ssid_len;
1637         connman_bool_t wps;
1638         connman_bool_t wps_pbc;
1639         connman_bool_t wps_ready;
1640         connman_bool_t wps_advertizing;
1641
1642         DBG("");
1643
1644         interface = g_supplicant_network_get_interface(supplicant_network);
1645         wifi = g_supplicant_interface_get_data(interface);
1646         name = g_supplicant_network_get_name(supplicant_network);
1647         identifier = g_supplicant_network_get_identifier(supplicant_network);
1648         security = g_supplicant_network_get_security(supplicant_network);
1649         group = g_supplicant_network_get_identifier(supplicant_network);
1650         wps = g_supplicant_network_get_wps(supplicant_network);
1651         wps_pbc = g_supplicant_network_is_wps_pbc(supplicant_network);
1652         wps_ready = g_supplicant_network_is_wps_active(supplicant_network);
1653         wps_advertizing = g_supplicant_network_is_wps_advertizing(
1654                                                         supplicant_network);
1655         mode = g_supplicant_network_get_mode(supplicant_network);
1656
1657         if (wifi == NULL)
1658                 return;
1659
1660         ssid = g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
1661
1662         network = connman_device_get_network(wifi->device, identifier);
1663
1664         if (network == NULL) {
1665                 network = connman_network_create(identifier,
1666                                                 CONNMAN_NETWORK_TYPE_WIFI);
1667                 if (network == NULL)
1668                         return;
1669
1670                 connman_network_set_index(network, wifi->index);
1671
1672                 if (connman_device_add_network(wifi->device, network) < 0) {
1673                         connman_network_unref(network);
1674                         return;
1675                 }
1676
1677                 wifi->networks = g_slist_prepend(wifi->networks, network);
1678         }
1679
1680         if (name != NULL && name[0] != '\0')
1681                 connman_network_set_name(network, name);
1682
1683         connman_network_set_blob(network, "WiFi.SSID",
1684                                                 ssid, ssid_len);
1685         connman_network_set_string(network, "WiFi.Security", security);
1686         connman_network_set_strength(network,
1687                                 calculate_strength(supplicant_network));
1688         connman_network_set_bool(network, "WiFi.WPS", wps);
1689
1690         if (wps == TRUE) {
1691                 /* Is AP advertizing for WPS association?
1692                  * If so, we decide to use WPS by default */
1693                 if (wps_ready == TRUE && wps_pbc == TRUE &&
1694                                                 wps_advertizing == TRUE)
1695                         connman_network_set_bool(network, "WiFi.UseWPS", TRUE);
1696         }
1697
1698         connman_network_set_frequency(network,
1699                         g_supplicant_network_get_frequency(supplicant_network));
1700
1701         connman_network_set_available(network, TRUE);
1702         connman_network_set_string(network, "WiFi.Mode", mode);
1703
1704         if (ssid != NULL)
1705                 connman_network_set_group(network, group);
1706
1707         if (wifi->hidden != NULL && ssid != NULL) {
1708                 if (wifi->hidden->ssid_len == ssid_len &&
1709                                 memcmp(wifi->hidden->ssid, ssid,
1710                                                 ssid_len) == 0) {
1711                         connman_network_connect_hidden(network,
1712                                         wifi->hidden->identity,
1713                                         wifi->hidden->passphrase,
1714                                         wifi->hidden->user_data);
1715                         wifi->hidden->user_data = NULL;
1716                         hidden_free(wifi->hidden);
1717                         wifi->hidden = NULL;
1718                 }
1719         }
1720 }
1721
1722 static void network_removed(GSupplicantNetwork *network)
1723 {
1724         GSupplicantInterface *interface;
1725         struct wifi_data *wifi;
1726         const char *name, *identifier;
1727         struct connman_network *connman_network;
1728
1729         interface = g_supplicant_network_get_interface(network);
1730         wifi = g_supplicant_interface_get_data(interface);
1731         identifier = g_supplicant_network_get_identifier(network);
1732         name = g_supplicant_network_get_name(network);
1733
1734         DBG("name %s", name);
1735
1736         if (wifi == NULL)
1737                 return;
1738
1739         connman_network = connman_device_get_network(wifi->device, identifier);
1740         if (connman_network == NULL)
1741                 return;
1742
1743         wifi->networks = g_slist_remove(wifi->networks, connman_network);
1744
1745         connman_device_remove_network(wifi->device, connman_network);
1746         connman_network_unref(connman_network);
1747 }
1748
1749 static void network_changed(GSupplicantNetwork *network, const char *property)
1750 {
1751         GSupplicantInterface *interface;
1752         struct wifi_data *wifi;
1753         const char *name, *identifier;
1754         struct connman_network *connman_network;
1755
1756         interface = g_supplicant_network_get_interface(network);
1757         wifi = g_supplicant_interface_get_data(interface);
1758         identifier = g_supplicant_network_get_identifier(network);
1759         name = g_supplicant_network_get_name(network);
1760
1761         DBG("name %s", name);
1762
1763         if (wifi == NULL)
1764                 return;
1765
1766         connman_network = connman_device_get_network(wifi->device, identifier);
1767         if (connman_network == NULL)
1768                 return;
1769
1770         if (g_str_equal(property, "Signal") == TRUE) {
1771                connman_network_set_strength(connman_network,
1772                                         calculate_strength(network));
1773                connman_network_update(connman_network);
1774         }
1775 }
1776
1777 static void debug(const char *str)
1778 {
1779         if (getenv("CONNMAN_SUPPLICANT_DEBUG"))
1780                 connman_debug("%s", str);
1781 }
1782
1783 static const GSupplicantCallbacks callbacks = {
1784         .system_ready           = system_ready,
1785         .system_killed          = system_killed,
1786         .interface_added        = interface_added,
1787         .interface_state        = interface_state,
1788         .interface_removed      = interface_removed,
1789         .scan_started           = scan_started,
1790         .scan_finished          = scan_finished,
1791         .network_added          = network_added,
1792         .network_removed        = network_removed,
1793         .network_changed        = network_changed,
1794         .debug                  = debug,
1795 };
1796
1797
1798 static int tech_probe(struct connman_technology *technology)
1799 {
1800         wifi_technology = technology;
1801
1802         return 0;
1803 }
1804
1805 static void tech_remove(struct connman_technology *technology)
1806 {
1807         wifi_technology = NULL;
1808 }
1809
1810 struct wifi_tethering_info {
1811         struct wifi_data *wifi;
1812         struct connman_technology *technology;
1813         char *ifname;
1814         GSupplicantSSID *ssid;
1815 };
1816
1817 static GSupplicantSSID *ssid_ap_init(const char *ssid, const char *passphrase)
1818 {
1819         GSupplicantSSID *ap;
1820
1821         ap = g_try_malloc0(sizeof(GSupplicantSSID));
1822         if (ap == NULL)
1823                 return NULL;
1824
1825         ap->mode = G_SUPPLICANT_MODE_MASTER;
1826         ap->ssid = ssid;
1827         ap->ssid_len = strlen(ssid);
1828         ap->scan_ssid = 0;
1829         ap->freq = 2412;
1830
1831         if (passphrase == NULL || strlen(passphrase) == 0) {
1832                 ap->security = G_SUPPLICANT_SECURITY_NONE;
1833                 ap->passphrase = NULL;
1834         } else {
1835                ap->security = G_SUPPLICANT_SECURITY_PSK;
1836                ap->protocol = G_SUPPLICANT_PROTO_RSN;
1837                ap->pairwise_cipher = G_SUPPLICANT_PAIRWISE_CCMP;
1838                ap->group_cipher = G_SUPPLICANT_GROUP_CCMP;
1839                ap->passphrase = passphrase;
1840         }
1841
1842         return ap;
1843 }
1844
1845 static void ap_start_callback(int result, GSupplicantInterface *interface,
1846                                                         void *user_data)
1847 {
1848         struct wifi_tethering_info *info = user_data;
1849
1850         DBG("result %d index %d bridge %s",
1851                 result, info->wifi->index, info->wifi->bridge);
1852
1853         if (result < 0) {
1854                 connman_inet_remove_from_bridge(info->wifi->index,
1855                                                         info->wifi->bridge);
1856                 connman_technology_tethering_notify(info->technology, FALSE);
1857         }
1858
1859         g_free(info->ifname);
1860         g_free(info);
1861 }
1862
1863 static void ap_create_callback(int result,
1864                                 GSupplicantInterface *interface,
1865                                         void *user_data)
1866 {
1867         struct wifi_tethering_info *info = user_data;
1868
1869         DBG("result %d ifname %s", result,
1870                                 g_supplicant_interface_get_ifname(interface));
1871
1872         if (result < 0) {
1873                 connman_inet_remove_from_bridge(info->wifi->index,
1874                                                         info->wifi->bridge);
1875                 connman_technology_tethering_notify(info->technology, FALSE);
1876
1877                 g_free(info->ifname);
1878                 g_free(info);
1879                 return;
1880         }
1881
1882         info->wifi->interface = interface;
1883         g_supplicant_interface_set_data(interface, info->wifi);
1884
1885         if (g_supplicant_interface_set_apscan(interface, 2) < 0)
1886                 connman_error("Failed to set interface ap_scan property");
1887
1888         g_supplicant_interface_connect(interface, info->ssid,
1889                                                 ap_start_callback, info);
1890 }
1891
1892 static void sta_remove_callback(int result,
1893                                 GSupplicantInterface *interface,
1894                                         void *user_data)
1895 {
1896         struct wifi_tethering_info *info = user_data;
1897         const char *driver = connman_option_get_string("wifi");
1898
1899         DBG("ifname %s result %d ", info->ifname, result);
1900
1901         if (result < 0) {
1902                 info->wifi->tethering = TRUE;
1903
1904                 g_free(info->ifname);
1905                 g_free(info);
1906                 return;
1907         }
1908
1909         info->wifi->interface = NULL;
1910
1911         connman_technology_tethering_notify(info->technology, TRUE);
1912
1913         g_supplicant_interface_create(info->ifname, driver, info->wifi->bridge,
1914                                                 ap_create_callback,
1915                                                         info);
1916 }
1917
1918 static int tech_set_tethering(struct connman_technology *technology,
1919                                 const char *identifier, const char *passphrase,
1920                                 const char *bridge, connman_bool_t enabled)
1921 {
1922         GList *list;
1923         GSupplicantInterface *interface;
1924         struct wifi_data *wifi;
1925         struct wifi_tethering_info *info;
1926         const char *ifname;
1927         unsigned int mode;
1928         int err;
1929
1930         DBG("");
1931
1932         if (enabled == FALSE) {
1933                 for (list = iface_list; list; list = list->next) {
1934                         wifi = list->data;
1935
1936                         if (wifi->tethering == TRUE) {
1937                                 wifi->tethering = FALSE;
1938
1939                                 connman_inet_remove_from_bridge(wifi->index,
1940                                                                         bridge);
1941                                 wifi->bridged = FALSE;
1942                         }
1943                 }
1944
1945                 connman_technology_tethering_notify(technology, FALSE);
1946
1947                 return 0;
1948         }
1949
1950         for (list = iface_list; list; list = list->next) {
1951                 wifi = list->data;
1952
1953                 interface = wifi->interface;
1954
1955                 if (interface == NULL)
1956                         continue;
1957
1958                 ifname = g_supplicant_interface_get_ifname(wifi->interface);
1959
1960                 mode = g_supplicant_interface_get_mode(interface);
1961                 if ((mode & G_SUPPLICANT_CAPABILITY_MODE_AP) == 0) {
1962                         DBG("%s does not support AP mode", ifname);
1963                         continue;
1964                 }
1965
1966                 info = g_try_malloc0(sizeof(struct wifi_tethering_info));
1967                 if (info == NULL)
1968                         return -ENOMEM;
1969
1970                 info->wifi = wifi;
1971                 info->technology = technology;
1972                 info->wifi->bridge = bridge;
1973                 info->ssid = ssid_ap_init(identifier, passphrase);
1974                 if (info->ssid == NULL) {
1975                         g_free(info);
1976                         continue;
1977                 }
1978                 info->ifname = g_strdup(ifname);
1979                 if (info->ifname == NULL) {
1980                         g_free(info);
1981                         continue;
1982                 }
1983
1984                 info->wifi->tethering = TRUE;
1985
1986                 err = g_supplicant_interface_remove(interface,
1987                                                 sta_remove_callback,
1988                                                         info);
1989                 if (err == 0)
1990                         return err;
1991         }
1992
1993         return -EOPNOTSUPP;
1994 }
1995
1996 static void regdom_callback(int result, const char *alpha2, void *user_data)
1997 {
1998         DBG("");
1999
2000         if (wifi_technology == NULL)
2001                 return;
2002
2003         if (result != 0)
2004                 alpha2 = NULL;
2005
2006         connman_technology_regdom_notify(wifi_technology, alpha2);
2007 }
2008
2009 static int tech_set_regdom(struct connman_technology *technology, const char *alpha2)
2010 {
2011         return g_supplicant_set_country(alpha2, regdom_callback, NULL);
2012 }
2013
2014 static struct connman_technology_driver tech_driver = {
2015         .name           = "wifi",
2016         .type           = CONNMAN_SERVICE_TYPE_WIFI,
2017         .probe          = tech_probe,
2018         .remove         = tech_remove,
2019         .set_tethering  = tech_set_tethering,
2020         .set_regdom     = tech_set_regdom,
2021 };
2022
2023 static int wifi_init(void)
2024 {
2025         int err;
2026
2027         err = connman_network_driver_register(&network_driver);
2028         if (err < 0)
2029                 return err;
2030
2031         err = g_supplicant_register(&callbacks);
2032         if (err < 0) {
2033                 connman_network_driver_unregister(&network_driver);
2034                 return err;
2035         }
2036
2037         err = connman_technology_driver_register(&tech_driver);
2038         if (err < 0) {
2039                 g_supplicant_unregister(&callbacks);
2040                 connman_network_driver_unregister(&network_driver);
2041                 return err;
2042         }
2043
2044         return 0;
2045 }
2046
2047 static void wifi_exit(void)
2048 {
2049         DBG();
2050
2051         connman_technology_driver_unregister(&tech_driver);
2052
2053         g_supplicant_unregister(&callbacks);
2054
2055         connman_network_driver_unregister(&network_driver);
2056 }
2057
2058 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
2059                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)