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