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         if (wifi->network != NULL) {
1242                 /*
1243                  * if result < 0 supplican return an error because
1244                  * the network is not current.
1245                  * we wont receive G_SUPPLICANT_STATE_DISCONNECTED since it
1246                  * failed, call connman_network_set_connected to report
1247                  * disconnect is completed.
1248                  */
1249                 if (result < 0)
1250                         connman_network_set_connected(wifi->network, FALSE);
1251         }
1252
1253         wifi->network = NULL;
1254
1255         wifi->disconnecting = FALSE;
1256
1257         if (wifi->pending_network != NULL) {
1258                 network_connect(wifi->pending_network);
1259                 wifi->pending_network = NULL;
1260         }
1261
1262         start_autoscan(wifi->device);
1263 }
1264
1265 static int network_disconnect(struct connman_network *network)
1266 {
1267         struct connman_device *device = connman_network_get_device(network);
1268         struct wifi_data *wifi;
1269         int err;
1270
1271         DBG("network %p", network);
1272
1273         wifi = connman_device_get_data(device);
1274         if (wifi == NULL || wifi->interface == NULL)
1275                 return -ENODEV;
1276
1277         connman_network_set_associating(network, FALSE);
1278
1279         if (wifi->disconnecting == TRUE)
1280                 return -EALREADY;
1281
1282         wifi->disconnecting = TRUE;
1283
1284         err = g_supplicant_interface_disconnect(wifi->interface,
1285                                                 disconnect_callback, wifi);
1286         if (err < 0)
1287                 wifi->disconnecting = FALSE;
1288
1289         return err;
1290 }
1291
1292 static struct connman_network_driver network_driver = {
1293         .name           = "wifi",
1294         .type           = CONNMAN_NETWORK_TYPE_WIFI,
1295         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
1296         .probe          = network_probe,
1297         .remove         = network_remove,
1298         .connect        = network_connect,
1299         .disconnect     = network_disconnect,
1300 };
1301
1302 static void interface_added(GSupplicantInterface *interface)
1303 {
1304         const char *ifname = g_supplicant_interface_get_ifname(interface);
1305         const char *driver = g_supplicant_interface_get_driver(interface);
1306         struct wifi_data *wifi;
1307
1308         wifi = g_supplicant_interface_get_data(interface);
1309
1310         /*
1311          * We can get here with a NULL wifi pointer when
1312          * the interface added signal is sent before the
1313          * interface creation callback is called.
1314          */
1315         if (wifi == NULL)
1316                 return;
1317
1318         DBG("ifname %s driver %s wifi %p tethering %d",
1319                         ifname, driver, wifi, wifi->tethering);
1320
1321         if (wifi->device == NULL) {
1322                 connman_error("WiFi device not set");
1323                 return;
1324         }
1325
1326         connman_device_set_powered(wifi->device, TRUE);
1327
1328         if (wifi->tethering == TRUE)
1329                 return;
1330 }
1331
1332 static connman_bool_t is_idle(struct wifi_data *wifi)
1333 {
1334         DBG("state %d", wifi->state);
1335
1336         switch (wifi->state) {
1337         case G_SUPPLICANT_STATE_UNKNOWN:
1338         case G_SUPPLICANT_STATE_DISABLED:
1339         case G_SUPPLICANT_STATE_DISCONNECTED:
1340         case G_SUPPLICANT_STATE_INACTIVE:
1341         case G_SUPPLICANT_STATE_SCANNING:
1342                 return TRUE;
1343
1344         case G_SUPPLICANT_STATE_AUTHENTICATING:
1345         case G_SUPPLICANT_STATE_ASSOCIATING:
1346         case G_SUPPLICANT_STATE_ASSOCIATED:
1347         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1348         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1349         case G_SUPPLICANT_STATE_COMPLETED:
1350                 return FALSE;
1351         }
1352
1353         return FALSE;
1354 }
1355
1356 static connman_bool_t is_idle_wps(GSupplicantInterface *interface,
1357                                                 struct wifi_data *wifi)
1358 {
1359         /* First, let's check if WPS processing did not went wrong */
1360         if (g_supplicant_interface_get_wps_state(interface) ==
1361                 G_SUPPLICANT_WPS_STATE_FAIL)
1362                 return FALSE;
1363
1364         /* Unlike normal connection, being associated while processing wps
1365          * actually means that we are idling. */
1366         switch (wifi->state) {
1367         case G_SUPPLICANT_STATE_UNKNOWN:
1368         case G_SUPPLICANT_STATE_DISABLED:
1369         case G_SUPPLICANT_STATE_DISCONNECTED:
1370         case G_SUPPLICANT_STATE_INACTIVE:
1371         case G_SUPPLICANT_STATE_SCANNING:
1372         case G_SUPPLICANT_STATE_ASSOCIATED:
1373                 return TRUE;
1374         case G_SUPPLICANT_STATE_AUTHENTICATING:
1375         case G_SUPPLICANT_STATE_ASSOCIATING:
1376         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1377         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1378         case G_SUPPLICANT_STATE_COMPLETED:
1379                 return FALSE;
1380         }
1381
1382         return FALSE;
1383 }
1384
1385 static connman_bool_t handle_wps_completion(GSupplicantInterface *interface,
1386                                         struct connman_network *network,
1387                                         struct connman_device *device,
1388                                         struct wifi_data *wifi)
1389 {
1390         connman_bool_t wps;
1391
1392         wps = connman_network_get_bool(network, "WiFi.UseWPS");
1393         if (wps == TRUE) {
1394                 const unsigned char *ssid, *wps_ssid;
1395                 unsigned int ssid_len, wps_ssid_len;
1396                 const char *wps_key;
1397
1398                 /* Checking if we got associated with requested
1399                  * network */
1400                 ssid = connman_network_get_blob(network, "WiFi.SSID",
1401                                                 &ssid_len);
1402
1403                 wps_ssid = g_supplicant_interface_get_wps_ssid(
1404                         interface, &wps_ssid_len);
1405
1406                 if (wps_ssid == NULL || wps_ssid_len != ssid_len ||
1407                                 memcmp(ssid, wps_ssid, ssid_len) != 0) {
1408                         connman_network_set_associating(network, FALSE);
1409                         g_supplicant_interface_disconnect(wifi->interface,
1410                                                 disconnect_callback, wifi);
1411                         return FALSE;
1412                 }
1413
1414                 wps_key = g_supplicant_interface_get_wps_key(interface);
1415                 connman_network_set_string(network, "WiFi.Passphrase",
1416                                         wps_key);
1417
1418                 connman_network_set_string(network, "WiFi.PinWPS", NULL);
1419         }
1420
1421         return TRUE;
1422 }
1423
1424 static connman_bool_t handle_4way_handshake_failure(GSupplicantInterface *interface,
1425                                         struct connman_network *network,
1426                                         struct wifi_data *wifi)
1427 {
1428         struct connman_service *service;
1429
1430         if (wifi->state != G_SUPPLICANT_STATE_4WAY_HANDSHAKE)
1431                 return FALSE;
1432
1433         service = connman_service_lookup_from_network(network);
1434         if (service == NULL)
1435                 return FALSE;
1436
1437         wifi->retries++;
1438
1439         if (connman_service_get_favorite(service) == TRUE) {
1440                 if (wifi->retries < FAVORITE_MAXIMUM_RETRIES)
1441                         return TRUE;
1442         } else if (wifi->retries < MAXIMUM_RETRIES)
1443                 return TRUE;
1444
1445         connman_network_set_error(network, CONNMAN_NETWORK_ERROR_INVALID_KEY);
1446
1447         return FALSE;
1448 }
1449
1450 static void interface_state(GSupplicantInterface *interface)
1451 {
1452         struct connman_network *network;
1453         struct connman_device *device;
1454         struct wifi_data *wifi;
1455         GSupplicantState state = g_supplicant_interface_get_state(interface);
1456         connman_bool_t wps;
1457
1458         wifi = g_supplicant_interface_get_data(interface);
1459
1460         DBG("wifi %p interface state %d", wifi, state);
1461
1462         if (wifi == NULL)
1463                 return;
1464
1465         network = wifi->network;
1466         device = wifi->device;
1467
1468         if (device == NULL || network == NULL)
1469                 return;
1470
1471         switch (state) {
1472         case G_SUPPLICANT_STATE_SCANNING:
1473                 break;
1474
1475         case G_SUPPLICANT_STATE_AUTHENTICATING:
1476         case G_SUPPLICANT_STATE_ASSOCIATING:
1477                 stop_autoscan(device);
1478
1479                 if (wifi->connected == FALSE)
1480                         connman_network_set_associating(network, TRUE);
1481
1482                 break;
1483
1484         case G_SUPPLICANT_STATE_COMPLETED:
1485                 /* though it should be already stopped: */
1486                 stop_autoscan(device);
1487
1488                 if (handle_wps_completion(interface, network, device, wifi) ==
1489                                                                         FALSE)
1490                         break;
1491
1492                 connman_network_set_connected(network, TRUE);
1493                 break;
1494
1495         case G_SUPPLICANT_STATE_DISCONNECTED:
1496                 /*
1497                  * If we're in one of the idle modes, we have
1498                  * not started association yet and thus setting
1499                  * those ones to FALSE could cancel an association
1500                  * in progress.
1501                  */
1502                 wps = connman_network_get_bool(network, "WiFi.UseWPS");
1503                 if (wps == TRUE)
1504                         if (is_idle_wps(interface, wifi) == TRUE)
1505                                 break;
1506
1507                 if (is_idle(wifi))
1508                         break;
1509
1510                 /* If previous state was 4way-handshake, then
1511                  * it's either: psk was incorrect and thus we retry
1512                  * or if we reach the maximum retries we declare the
1513                  * psk as wrong */
1514                 if (handle_4way_handshake_failure(interface,
1515                                                 network, wifi) == TRUE)
1516                         break;
1517
1518                 /* We disable the selected network, if not then
1519                  * wpa_supplicant will loop retrying */
1520                 if (g_supplicant_interface_enable_selected_network(interface,
1521                                                 FALSE) != 0)
1522                         DBG("Could not disables selected network");
1523
1524                 connman_network_set_connected(network, FALSE);
1525                 connman_network_set_associating(network, FALSE);
1526                 wifi->disconnecting = FALSE;
1527
1528                 start_autoscan(device);
1529
1530                 break;
1531
1532         case G_SUPPLICANT_STATE_INACTIVE:
1533                 connman_network_set_associating(network, FALSE);
1534                 start_autoscan(device);
1535
1536                 break;
1537
1538         case G_SUPPLICANT_STATE_UNKNOWN:
1539         case G_SUPPLICANT_STATE_DISABLED:
1540         case G_SUPPLICANT_STATE_ASSOCIATED:
1541         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1542         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1543                 break;
1544         }
1545
1546         wifi->state = state;
1547
1548         /* Saving wpa_s state policy:
1549          * If connected and if the state changes are roaming related:
1550          * --> We stay connected
1551          * If completed
1552          * --> We are connected
1553          * All other case:
1554          * --> We are not connected
1555          * */
1556         switch (state) {
1557         case G_SUPPLICANT_STATE_AUTHENTICATING:
1558         case G_SUPPLICANT_STATE_ASSOCIATING:
1559         case G_SUPPLICANT_STATE_ASSOCIATED:
1560         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
1561         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
1562                 if (wifi->connected == TRUE)
1563                         connman_warn("Probably roaming right now!"
1564                                                 " Staying connected...");
1565                 else
1566                         wifi->connected = FALSE;
1567                 break;
1568         case G_SUPPLICANT_STATE_COMPLETED:
1569                 wifi->connected = TRUE;
1570                 break;
1571         default:
1572                 wifi->connected = FALSE;
1573                 break;
1574         }
1575
1576         DBG("DONE");
1577 }
1578
1579 static void interface_removed(GSupplicantInterface *interface)
1580 {
1581         const char *ifname = g_supplicant_interface_get_ifname(interface);
1582         struct wifi_data *wifi;
1583
1584         DBG("ifname %s", ifname);
1585
1586         wifi = g_supplicant_interface_get_data(interface);
1587
1588         if (wifi != NULL && wifi->tethering == TRUE)
1589                 return;
1590
1591         if (wifi == NULL || wifi->device == NULL) {
1592                 DBG("wifi interface already removed");
1593                 return;
1594         }
1595
1596         wifi->interface = NULL;
1597         connman_device_set_powered(wifi->device, FALSE);
1598 }
1599
1600 static void scan_started(GSupplicantInterface *interface)
1601 {
1602         DBG("");
1603 }
1604
1605 static void scan_finished(GSupplicantInterface *interface)
1606 {
1607         DBG("");
1608 }
1609
1610 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
1611 {
1612         unsigned char strength;
1613
1614         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
1615         if (strength > 100)
1616                 strength = 100;
1617
1618         return strength;
1619 }
1620
1621 static void network_added(GSupplicantNetwork *supplicant_network)
1622 {
1623         struct connman_network *network;
1624         GSupplicantInterface *interface;
1625         struct wifi_data *wifi;
1626         const char *name, *identifier, *security, *group, *mode;
1627         const unsigned char *ssid;
1628         unsigned int ssid_len;
1629         connman_bool_t wps;
1630         connman_bool_t wps_pbc;
1631         connman_bool_t wps_ready;
1632         connman_bool_t wps_advertizing;
1633
1634         DBG("");
1635
1636         interface = g_supplicant_network_get_interface(supplicant_network);
1637         wifi = g_supplicant_interface_get_data(interface);
1638         name = g_supplicant_network_get_name(supplicant_network);
1639         identifier = g_supplicant_network_get_identifier(supplicant_network);
1640         security = g_supplicant_network_get_security(supplicant_network);
1641         group = g_supplicant_network_get_identifier(supplicant_network);
1642         wps = g_supplicant_network_get_wps(supplicant_network);
1643         wps_pbc = g_supplicant_network_is_wps_pbc(supplicant_network);
1644         wps_ready = g_supplicant_network_is_wps_active(supplicant_network);
1645         wps_advertizing = g_supplicant_network_is_wps_advertizing(
1646                                                         supplicant_network);
1647         mode = g_supplicant_network_get_mode(supplicant_network);
1648
1649         if (wifi == NULL)
1650                 return;
1651
1652         ssid = g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
1653
1654         network = connman_device_get_network(wifi->device, identifier);
1655
1656         if (network == NULL) {
1657                 network = connman_network_create(identifier,
1658                                                 CONNMAN_NETWORK_TYPE_WIFI);
1659                 if (network == NULL)
1660                         return;
1661
1662                 connman_network_set_index(network, wifi->index);
1663
1664                 if (connman_device_add_network(wifi->device, network) < 0) {
1665                         connman_network_unref(network);
1666                         return;
1667                 }
1668
1669                 wifi->networks = g_slist_prepend(wifi->networks, network);
1670         }
1671
1672         if (name != NULL && name[0] != '\0')
1673                 connman_network_set_name(network, name);
1674
1675         connman_network_set_blob(network, "WiFi.SSID",
1676                                                 ssid, ssid_len);
1677         connman_network_set_string(network, "WiFi.Security", security);
1678         connman_network_set_strength(network,
1679                                 calculate_strength(supplicant_network));
1680         connman_network_set_bool(network, "WiFi.WPS", wps);
1681
1682         if (wps == TRUE) {
1683                 /* Is AP advertizing for WPS association?
1684                  * If so, we decide to use WPS by default */
1685                 if (wps_ready == TRUE && wps_pbc == TRUE &&
1686                                                 wps_advertizing == TRUE)
1687                         connman_network_set_bool(network, "WiFi.UseWPS", TRUE);
1688         }
1689
1690         connman_network_set_frequency(network,
1691                         g_supplicant_network_get_frequency(supplicant_network));
1692
1693         connman_network_set_available(network, TRUE);
1694         connman_network_set_string(network, "WiFi.Mode", mode);
1695
1696         if (ssid != NULL)
1697                 connman_network_set_group(network, group);
1698
1699         if (wifi->hidden != NULL && ssid != NULL) {
1700                 if (wifi->hidden->ssid_len == ssid_len &&
1701                                 memcmp(wifi->hidden->ssid, ssid,
1702                                                 ssid_len) == 0) {
1703                         connman_network_connect_hidden(network,
1704                                         wifi->hidden->identity,
1705                                         wifi->hidden->passphrase,
1706                                         wifi->hidden->user_data);
1707                         wifi->hidden->user_data = NULL;
1708                         hidden_free(wifi->hidden);
1709                         wifi->hidden = NULL;
1710                 }
1711         }
1712 }
1713
1714 static void network_removed(GSupplicantNetwork *network)
1715 {
1716         GSupplicantInterface *interface;
1717         struct wifi_data *wifi;
1718         const char *name, *identifier;
1719         struct connman_network *connman_network;
1720
1721         interface = g_supplicant_network_get_interface(network);
1722         wifi = g_supplicant_interface_get_data(interface);
1723         identifier = g_supplicant_network_get_identifier(network);
1724         name = g_supplicant_network_get_name(network);
1725
1726         DBG("name %s", name);
1727
1728         if (wifi == NULL)
1729                 return;
1730
1731         connman_network = connman_device_get_network(wifi->device, identifier);
1732         if (connman_network == NULL)
1733                 return;
1734
1735         wifi->networks = g_slist_remove(wifi->networks, connman_network);
1736
1737         connman_device_remove_network(wifi->device, connman_network);
1738         connman_network_unref(connman_network);
1739 }
1740
1741 static void network_changed(GSupplicantNetwork *network, const char *property)
1742 {
1743         GSupplicantInterface *interface;
1744         struct wifi_data *wifi;
1745         const char *name, *identifier;
1746         struct connman_network *connman_network;
1747
1748         interface = g_supplicant_network_get_interface(network);
1749         wifi = g_supplicant_interface_get_data(interface);
1750         identifier = g_supplicant_network_get_identifier(network);
1751         name = g_supplicant_network_get_name(network);
1752
1753         DBG("name %s", name);
1754
1755         if (wifi == NULL)
1756                 return;
1757
1758         connman_network = connman_device_get_network(wifi->device, identifier);
1759         if (connman_network == NULL)
1760                 return;
1761
1762         if (g_str_equal(property, "Signal") == TRUE) {
1763                connman_network_set_strength(connman_network,
1764                                         calculate_strength(network));
1765                connman_network_update(connman_network);
1766         }
1767 }
1768
1769 static void debug(const char *str)
1770 {
1771         if (getenv("CONNMAN_SUPPLICANT_DEBUG"))
1772                 connman_debug("%s", str);
1773 }
1774
1775 static const GSupplicantCallbacks callbacks = {
1776         .system_ready           = system_ready,
1777         .system_killed          = system_killed,
1778         .interface_added        = interface_added,
1779         .interface_state        = interface_state,
1780         .interface_removed      = interface_removed,
1781         .scan_started           = scan_started,
1782         .scan_finished          = scan_finished,
1783         .network_added          = network_added,
1784         .network_removed        = network_removed,
1785         .network_changed        = network_changed,
1786         .debug                  = debug,
1787 };
1788
1789
1790 static int tech_probe(struct connman_technology *technology)
1791 {
1792         wifi_technology = technology;
1793
1794         return 0;
1795 }
1796
1797 static void tech_remove(struct connman_technology *technology)
1798 {
1799         wifi_technology = NULL;
1800 }
1801
1802 struct wifi_tethering_info {
1803         struct wifi_data *wifi;
1804         struct connman_technology *technology;
1805         char *ifname;
1806         GSupplicantSSID *ssid;
1807 };
1808
1809 static GSupplicantSSID *ssid_ap_init(const char *ssid, const char *passphrase)
1810 {
1811         GSupplicantSSID *ap;
1812
1813         ap = g_try_malloc0(sizeof(GSupplicantSSID));
1814         if (ap == NULL)
1815                 return NULL;
1816
1817         ap->mode = G_SUPPLICANT_MODE_MASTER;
1818         ap->ssid = ssid;
1819         ap->ssid_len = strlen(ssid);
1820         ap->scan_ssid = 0;
1821         ap->freq = 2412;
1822
1823         if (passphrase == NULL || strlen(passphrase) == 0) {
1824                 ap->security = G_SUPPLICANT_SECURITY_NONE;
1825                 ap->passphrase = NULL;
1826         } else {
1827                ap->security = G_SUPPLICANT_SECURITY_PSK;
1828                ap->protocol = G_SUPPLICANT_PROTO_RSN;
1829                ap->pairwise_cipher = G_SUPPLICANT_PAIRWISE_CCMP;
1830                ap->group_cipher = G_SUPPLICANT_GROUP_CCMP;
1831                ap->passphrase = passphrase;
1832         }
1833
1834         return ap;
1835 }
1836
1837 static void ap_start_callback(int result, GSupplicantInterface *interface,
1838                                                         void *user_data)
1839 {
1840         struct wifi_tethering_info *info = user_data;
1841
1842         DBG("result %d index %d bridge %s",
1843                 result, info->wifi->index, info->wifi->bridge);
1844
1845         if (result < 0) {
1846                 connman_inet_remove_from_bridge(info->wifi->index,
1847                                                         info->wifi->bridge);
1848                 connman_technology_tethering_notify(info->technology, FALSE);
1849         }
1850
1851         g_free(info->ifname);
1852         g_free(info);
1853 }
1854
1855 static void ap_create_callback(int result,
1856                                 GSupplicantInterface *interface,
1857                                         void *user_data)
1858 {
1859         struct wifi_tethering_info *info = user_data;
1860
1861         DBG("result %d ifname %s", result,
1862                                 g_supplicant_interface_get_ifname(interface));
1863
1864         if (result < 0) {
1865                 connman_inet_remove_from_bridge(info->wifi->index,
1866                                                         info->wifi->bridge);
1867                 connman_technology_tethering_notify(info->technology, FALSE);
1868
1869                 g_free(info->ifname);
1870                 g_free(info);
1871                 return;
1872         }
1873
1874         info->wifi->interface = interface;
1875         g_supplicant_interface_set_data(interface, info->wifi);
1876
1877         if (g_supplicant_interface_set_apscan(interface, 2) < 0)
1878                 connman_error("Failed to set interface ap_scan property");
1879
1880         g_supplicant_interface_connect(interface, info->ssid,
1881                                                 ap_start_callback, info);
1882 }
1883
1884 static void sta_remove_callback(int result,
1885                                 GSupplicantInterface *interface,
1886                                         void *user_data)
1887 {
1888         struct wifi_tethering_info *info = user_data;
1889         const char *driver = connman_option_get_string("wifi");
1890
1891         DBG("ifname %s result %d ", info->ifname, result);
1892
1893         if (result < 0) {
1894                 info->wifi->tethering = TRUE;
1895
1896                 g_free(info->ifname);
1897                 g_free(info);
1898                 return;
1899         }
1900
1901         info->wifi->interface = NULL;
1902
1903         connman_technology_tethering_notify(info->technology, TRUE);
1904
1905         g_supplicant_interface_create(info->ifname, driver, info->wifi->bridge,
1906                                                 ap_create_callback,
1907                                                         info);
1908 }
1909
1910 static int tech_set_tethering(struct connman_technology *technology,
1911                                 const char *identifier, const char *passphrase,
1912                                 const char *bridge, connman_bool_t enabled)
1913 {
1914         GList *list;
1915         GSupplicantInterface *interface;
1916         struct wifi_data *wifi;
1917         struct wifi_tethering_info *info;
1918         const char *ifname;
1919         unsigned int mode;
1920         int err;
1921
1922         DBG("");
1923
1924         if (enabled == FALSE) {
1925                 for (list = iface_list; list; list = list->next) {
1926                         wifi = list->data;
1927
1928                         if (wifi->tethering == TRUE) {
1929                                 wifi->tethering = FALSE;
1930
1931                                 connman_inet_remove_from_bridge(wifi->index,
1932                                                                         bridge);
1933                                 wifi->bridged = FALSE;
1934                         }
1935                 }
1936
1937                 connman_technology_tethering_notify(technology, FALSE);
1938
1939                 return 0;
1940         }
1941
1942         for (list = iface_list; list; list = list->next) {
1943                 wifi = list->data;
1944
1945                 interface = wifi->interface;
1946
1947                 if (interface == NULL)
1948                         continue;
1949
1950                 ifname = g_supplicant_interface_get_ifname(wifi->interface);
1951
1952                 mode = g_supplicant_interface_get_mode(interface);
1953                 if ((mode & G_SUPPLICANT_CAPABILITY_MODE_AP) == 0) {
1954                         DBG("%s does not support AP mode", ifname);
1955                         continue;
1956                 }
1957
1958                 info = g_try_malloc0(sizeof(struct wifi_tethering_info));
1959                 if (info == NULL)
1960                         return -ENOMEM;
1961
1962                 info->wifi = wifi;
1963                 info->technology = technology;
1964                 info->wifi->bridge = bridge;
1965                 info->ssid = ssid_ap_init(identifier, passphrase);
1966                 if (info->ssid == NULL) {
1967                         g_free(info);
1968                         continue;
1969                 }
1970                 info->ifname = g_strdup(ifname);
1971                 if (info->ifname == NULL) {
1972                         g_free(info);
1973                         continue;
1974                 }
1975
1976                 info->wifi->tethering = TRUE;
1977
1978                 err = g_supplicant_interface_remove(interface,
1979                                                 sta_remove_callback,
1980                                                         info);
1981                 if (err == 0)
1982                         return err;
1983         }
1984
1985         return -EOPNOTSUPP;
1986 }
1987
1988 static void regdom_callback(int result, const char *alpha2, void *user_data)
1989 {
1990         DBG("");
1991
1992         if (wifi_technology == NULL)
1993                 return;
1994
1995         if (result != 0)
1996                 alpha2 = NULL;
1997
1998         connman_technology_regdom_notify(wifi_technology, alpha2);
1999 }
2000
2001 static int tech_set_regdom(struct connman_technology *technology, const char *alpha2)
2002 {
2003         return g_supplicant_set_country(alpha2, regdom_callback, NULL);
2004 }
2005
2006 static struct connman_technology_driver tech_driver = {
2007         .name           = "wifi",
2008         .type           = CONNMAN_SERVICE_TYPE_WIFI,
2009         .probe          = tech_probe,
2010         .remove         = tech_remove,
2011         .set_tethering  = tech_set_tethering,
2012         .set_regdom     = tech_set_regdom,
2013 };
2014
2015 static int wifi_init(void)
2016 {
2017         int err;
2018
2019         err = connman_network_driver_register(&network_driver);
2020         if (err < 0)
2021                 return err;
2022
2023         err = g_supplicant_register(&callbacks);
2024         if (err < 0) {
2025                 connman_network_driver_unregister(&network_driver);
2026                 return err;
2027         }
2028
2029         err = connman_technology_driver_register(&tech_driver);
2030         if (err < 0) {
2031                 g_supplicant_unregister(&callbacks);
2032                 connman_network_driver_unregister(&network_driver);
2033                 return err;
2034         }
2035
2036         return 0;
2037 }
2038
2039 static void wifi_exit(void)
2040 {
2041         DBG();
2042
2043         connman_technology_driver_unregister(&tech_driver);
2044
2045         g_supplicant_unregister(&callbacks);
2046
2047         connman_network_driver_unregister(&network_driver);
2048 }
2049
2050 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
2051                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)