plugins/wifi.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <unistd.h>
  27 #include <stdlib.h>
  28 #include <errno.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/socket.h>
  33 #include <linux/if_arp.h>
  34 #include <linux/wireless.h>
  35 #include <net/ethernet.h>
  36
  37 #ifndef IFF_LOWER_UP
  38 #define IFF_LOWER_UP    0x10000
  39 #endif
  40
  41 #include <dbus/dbus.h>
  42 #include <glib.h>
  43
  44 #define CONNMAN_API_SUBJECT_TO_CHANGE
  45 #include <connman/plugin.h>
  46 #include <connman/inet.h>
  47 #include <connman/device.h>
  48 #include <connman/rtnl.h>
  49 #include <connman/technology.h>
  50 #include <connman/log.h>
  51 #include <connman/option.h>
  52 #include <connman/storage.h>
  53
  54 #include <gsupplicant/gsupplicant.h>
  55
  56 #define CLEANUP_TIMEOUT   8     /* in seconds */
  57 #define INACTIVE_TIMEOUT  12    /* in seconds */
  58 #define MAXIMUM_RETRIES   4
  59
  60 struct connman_technology *wifi_technology = NULL;
  61
  62 struct wifi_data {
  63         char *identifier;
  64         struct connman_device *device;
  65         struct connman_network *network;
  66         struct connman_network *pending_network;
  67         GSList *networks;
  68         GSupplicantInterface *interface;
  69         GSupplicantState state;
  70         connman_bool_t connected;
  71         connman_bool_t disconnecting;
  72         connman_bool_t tethering;
  73         connman_bool_t bridged;
  74         const char *bridge;
  75         int index;
  76         unsigned flags;
  77         unsigned int watch;
  78         int retries;
  79 };
  80
  81 static GList *iface_list = NULL;
  82
  83 static void handle_tethering(struct wifi_data *wifi)
  84 {
  85         if (wifi->tethering == FALSE)
  86                 return;
  87
  88         if (wifi->bridge == NULL)
  89                 return;
  90
  91         if (wifi->bridged == TRUE)
  92                 return;
  93
  94         DBG("index %d bridge %s", wifi->index, wifi->bridge);
  95
  96         if (connman_inet_add_to_bridge(wifi->index, wifi->bridge) < 0)
  97                 return;
  98
  99         wifi->bridged = TRUE;
 100 }
 101
 102 static void wifi_newlink(unsigned flags, unsigned change, void *user_data)
 103 {
 104         struct connman_device *device = user_data;
 105         struct wifi_data *wifi = connman_device_get_data(device);
 106
 107         DBG("index %d flags %d change %d", wifi->index, flags, change);
 108
 109         if (!change)
 110                 return;
 111
 112         if ((wifi->flags & IFF_UP) != (flags & IFF_UP)) {
 113                 if (flags & IFF_UP)
 114                         DBG("interface up");
 115                 else
 116                         DBG("interface down");
 117         }
 118
 119         if ((wifi->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 120                 if (flags & IFF_LOWER_UP) {
 121                         DBG("carrier on");
 122
 123                         handle_tethering(wifi);
 124                 } else
 125                         DBG("carrier off");
 126         }
 127
 128         wifi->flags = flags;
 129 }
 130
 131 static int wifi_probe(struct connman_device *device)
 132 {
 133         struct wifi_data *wifi;
 134
 135         DBG("device %p", device);
 136
 137         wifi = g_try_new0(struct wifi_data, 1);
 138         if (wifi == NULL)
 139                 return -ENOMEM;
 140
 141         wifi->connected = FALSE;
 142         wifi->disconnecting = FALSE;
 143         wifi->tethering = FALSE;
 144         wifi->bridged = FALSE;
 145         wifi->bridge = NULL;
 146         wifi->state = G_SUPPLICANT_STATE_INACTIVE;
 147
 148         connman_device_set_data(device, wifi);
 149         wifi->device = connman_device_ref(device);
 150
 151         wifi->index = connman_device_get_index(device);
 152         wifi->flags = 0;
 153
 154         wifi->watch = connman_rtnl_add_newlink_watch(wifi->index,
 155                                                         wifi_newlink, device);
 156
 157         iface_list = g_list_append(iface_list, wifi);
 158
 159         return 0;
 160 }
 161
 162 static void remove_networks(struct connman_device *device,
 163                                 struct wifi_data *wifi)
 164 {
 165         GSList *list;
 166
 167         for (list = wifi->networks; list != NULL; list = list->next) {
 168                 struct connman_network *network = list->data;
 169
 170                 connman_device_remove_network(device, network);
 171                 connman_network_unref(network);
 172         }
 173
 174         g_slist_free(wifi->networks);
 175         wifi->networks = NULL;
 176 }
 177
 178 static void wifi_remove(struct connman_device *device)
 179 {
 180         struct wifi_data *wifi = connman_device_get_data(device);
 181
 182         DBG("device %p", device);
 183
 184         if (wifi == NULL)
 185                 return;
 186
 187         iface_list = g_list_remove(iface_list, wifi);
 188
 189         remove_networks(device, wifi);
 190
 191         connman_device_set_data(device, NULL);
 192         connman_device_unref(wifi->device);
 193         connman_rtnl_remove_watch(wifi->watch);
 194
 195         g_supplicant_interface_set_data(wifi->interface, NULL);
 196
 197         g_free(wifi->identifier);
 198         g_free(wifi);
 199 }
 200
 201 static void interface_create_callback(int result,
 202                                         GSupplicantInterface *interface,
 203                                                         void *user_data)
 204 {
 205         struct wifi_data *wifi = user_data;
 206
 207         DBG("result %d ifname %s, wifi %p", result,
 208                                 g_supplicant_interface_get_ifname(interface),
 209                                 wifi);
 210
 211         if (result < 0 || wifi == NULL)
 212                 return;
 213
 214         wifi->interface = interface;
 215         g_supplicant_interface_set_data(interface, wifi);
 216 }
 217
 218 static void interface_remove_callback(int result,
 219                                         GSupplicantInterface *interface,
 220                                                         void *user_data)
 221 {
 222         struct wifi_data *wifi = user_data;
 223
 224         DBG("result %d wifi %p", result, wifi);
 225
 226         if (result < 0 || wifi == NULL)
 227                 return;
 228
 229         wifi->interface = NULL;
 230 }
 231
 232
 233 static int wifi_enable(struct connman_device *device)
 234 {
 235         struct wifi_data *wifi = connman_device_get_data(device);
 236         const char *interface = connman_device_get_string(device, "Interface");
 237         const char *driver = connman_option_get_string("wifi");
 238         int ret;
 239
 240         DBG("device %p %p", device, wifi);
 241
 242         ret = g_supplicant_interface_create(interface, driver, NULL,
 243                                                 interface_create_callback,
 244                                                         wifi);
 245         if (ret < 0)
 246                 return ret;
 247
 248         return -EINPROGRESS;
 249 }
 250
 251 static int wifi_disable(struct connman_device *device)
 252 {
 253         struct wifi_data *wifi = connman_device_get_data(device);
 254         int ret;
 255
 256         DBG("device %p", device);
 257
 258         wifi->connected = FALSE;
 259         wifi->disconnecting = FALSE;
 260
 261         if (wifi->pending_network != NULL)
 262                 wifi->pending_network = NULL;
 263
 264         remove_networks(device, wifi);
 265
 266         ret = g_supplicant_interface_remove(wifi->interface,
 267                                                 interface_remove_callback,
 268                                                         wifi);
 269         if (ret < 0)
 270                 return ret;
 271
 272         return -EINPROGRESS;
 273 }
 274
 275 static void scan_callback(int result, GSupplicantInterface *interface,
 276                                                 void *user_data)
 277 {
 278         struct connman_device *device = user_data;
 279
 280         DBG("result %d", result);
 281
 282         if (result < 0)
 283                 connman_device_reset_scanning(device);
 284         else
 285                 connman_device_set_scanning(device, FALSE);
 286         connman_device_unref(device);
 287 }
 288
 289 static int add_scan_param(gchar *hex_ssid, int freq,
 290                         GSupplicantScanParams *scan_data,
 291                         int driver_max_scan_ssids)
 292 {
 293         unsigned int i;
 294
 295         if (driver_max_scan_ssids > scan_data->num_ssids && hex_ssid != NULL) {
 296                 gchar *ssid;
 297                 unsigned int j = 0, hex;
 298                 size_t hex_ssid_len = strlen(hex_ssid);
 299
 300                 ssid = g_try_malloc0(hex_ssid_len / 2);
 301                 if (ssid == NULL)
 302                         return -ENOMEM;
 303
 304                 for (i = 0; i < hex_ssid_len; i += 2) {
 305                         sscanf(hex_ssid + i, "%02x", &hex);
 306                         ssid[j++] = hex;
 307                 }
 308
 309                 memcpy(scan_data->ssids[scan_data->num_ssids].ssid, ssid, j);
 310                 scan_data->ssids[scan_data->num_ssids].ssid_len = j;
 311                 scan_data->num_ssids++;
 312
 313                 g_free(ssid);
 314         }
 315
 316         /* Don't add duplicate entries */
 317         for (i = 0; i < G_SUPPLICANT_MAX_FAST_SCAN; i++) {
 318                 if (scan_data->freqs[i] == 0) {
 319                         scan_data->freqs[i] = freq;
 320                         break;
 321                 } else if (scan_data->freqs[i] == freq)
 322                         break;
 323         }
 324
 325         return 0;
 326 }
 327
 328 struct last_connected {
 329         GTimeVal modified;
 330         gchar *ssid;
 331         int freq;
 332 };
 333
 334 static gint sort_entry(gconstpointer a, gconstpointer b, gpointer user_data)
 335 {
 336         GTimeVal *aval = (GTimeVal *)a;
 337         GTimeVal *bval = (GTimeVal *)b;
 338
 339         /* Note that the sort order is descending */
 340         if (aval->tv_sec < bval->tv_sec)
 341                 return 1;
 342
 343         if (aval->tv_sec > bval->tv_sec)
 344                 return -1;
 345
 346         return 0;
 347 }
 348
 349 static void free_entry(gpointer data)
 350 {
 351         struct last_connected *entry = data;
 352
 353         g_free(entry->ssid);
 354         g_free(entry);
 355 }
 356
 357 static int get_latest_connections(int max_ssids,
 358                                 GSupplicantScanParams *scan_data)
 359 {
 360         GSequenceIter *iter;
 361         GSequence *latest_list;
 362         struct last_connected *entry;
 363         GKeyFile *keyfile;
 364         GTimeVal modified;
 365         gchar **services;
 366         gchar *str;
 367         char *ssid;
 368         int i, freq;
 369         int num_ssids = 0;
 370
 371         latest_list = g_sequence_new(free_entry);
 372         if (latest_list == NULL)
 373                 return -ENOMEM;
 374
 375         services = connman_storage_get_services();
 376         for (i = 0; services && services[i]; i++) {
 377                 keyfile = connman_storage_load_service(services[i]);
 378
 379                 str = g_key_file_get_string(keyfile,
 380                                         services[i], "Favorite", NULL);
 381                 if (str == NULL || g_strcmp0(str, "true")) {
 382                         if (str)
 383                                 g_free(str);
 384                         g_key_file_free(keyfile);
 385                         continue;
 386                 }
 387                 g_free(str);
 388
 389                 str = g_key_file_get_string(keyfile,
 390                                         services[i], "AutoConnect", NULL);
 391                 if (str == NULL || g_strcmp0(str, "true")) {
 392                         if (str)
 393                                 g_free(str);
 394                         g_key_file_free(keyfile);
 395                         continue;
 396                 }
 397                 g_free(str);
 398
 399                 str = g_key_file_get_string(keyfile,
 400                                         services[i], "Modified", NULL);
 401                 if (str != NULL) {
 402                         g_time_val_from_iso8601(str, &modified);
 403                         g_free(str);
 404                 }
 405
 406                 ssid = g_key_file_get_string(keyfile,
 407                                         services[i], "SSID", NULL);
 408
 409                 freq = g_key_file_get_integer(keyfile, services[i],
 410                                         "Frequency", NULL);
 411                 if (freq) {
 412                         entry = g_try_new(struct last_connected, 1);
 413                         if (entry == NULL) {
 414                                 g_sequence_free(latest_list);
 415                                 g_key_file_free(keyfile);
 416                                 g_free(ssid);
 417                                 return -ENOMEM;
 418                         }
 419
 420                         entry->ssid = ssid;
 421                         entry->modified = modified;
 422                         entry->freq = freq;
 423
 424                         g_sequence_insert_sorted(latest_list, entry,
 425                                                 sort_entry, NULL);
 426                         num_ssids++;
 427                 } else
 428                         g_free(ssid);
 429
 430                 g_key_file_free(keyfile);
 431         }
 432
 433         g_strfreev(services);
 434
 435         num_ssids = num_ssids > G_SUPPLICANT_MAX_FAST_SCAN ?
 436                 G_SUPPLICANT_MAX_FAST_SCAN : num_ssids;
 437
 438         iter = g_sequence_get_begin_iter(latest_list);
 439
 440         for (i = 0; i < num_ssids; i++) {
 441                 entry = g_sequence_get(iter);
 442
 443                 DBG("ssid %s freq %d modified %lu", entry->ssid, entry->freq,
 444                                                 entry->modified.tv_sec);
 445
 446                 add_scan_param(entry->ssid, entry->freq, scan_data, max_ssids);
 447
 448                 iter = g_sequence_iter_next(iter);
 449         }
 450
 451         g_sequence_free(latest_list);
 452         return num_ssids;
 453 }
 454
 455 static int wifi_scan(struct connman_device *device)
 456 {
 457         struct wifi_data *wifi = connman_device_get_data(device);
 458         int ret;
 459
 460         DBG("device %p %p", device, wifi->interface);
 461
 462         if (wifi->tethering == TRUE)
 463                 return 0;
 464
 465         connman_device_ref(device);
 466         ret = g_supplicant_interface_scan(wifi->interface, NULL,
 467                                         scan_callback, device);
 468         if (ret == 0)
 469                 connman_device_set_scanning(device, TRUE);
 470         else
 471                 connman_device_unref(device);
 472
 473         return ret;
 474 }
 475
 476 static int wifi_scan_fast(struct connman_device *device)
 477 {
 478         struct wifi_data *wifi = connman_device_get_data(device);
 479         GSupplicantScanParams *scan_params = NULL;
 480         int ret;
 481         int driver_max_ssids = 0;
 482
 483         DBG("device %p %p", device, wifi->interface);
 484
 485         if (wifi->tethering == TRUE)
 486                 return 0;
 487
 488         driver_max_ssids = g_supplicant_interface_get_max_scan_ssids(
 489                                                         wifi->interface);
 490         DBG("max ssids %d", driver_max_ssids);
 491         if (driver_max_ssids == 0)
 492                 return wifi_scan(device);
 493
 494         scan_params = g_try_malloc0(sizeof(GSupplicantScanParams));
 495         if (scan_params == NULL)
 496                 return -ENOMEM;
 497
 498         ret = get_latest_connections(driver_max_ssids, scan_params);
 499         if (ret <= 0) {
 500                 g_free(scan_params);
 501                 return wifi_scan(device);
 502         }
 503
 504         connman_device_ref(device);
 505         ret = g_supplicant_interface_scan(wifi->interface, scan_params,
 506                                                 scan_callback, device);
 507         if (ret == 0)
 508                 connman_device_set_scanning(device, TRUE);
 509         else {
 510                 g_free(scan_params);
 511                 connman_device_unref(device);
 512         }
 513
 514         return ret;
 515 }
 516
 517 static struct connman_device_driver wifi_ng_driver = {
 518         .name           = "wifi",
 519         .type           = CONNMAN_DEVICE_TYPE_WIFI,
 520         .priority       = CONNMAN_DEVICE_PRIORITY_LOW,
 521         .probe          = wifi_probe,
 522         .remove         = wifi_remove,
 523         .enable         = wifi_enable,
 524         .disable        = wifi_disable,
 525         .scan           = wifi_scan,
 526         .scan_fast      = wifi_scan_fast,
 527 };
 528
 529 static void system_ready(void)
 530 {
 531         DBG("");
 532
 533         if (connman_device_driver_register(&wifi_ng_driver) < 0)
 534                 connman_error("Failed to register WiFi driver");
 535 }
 536
 537 static void system_killed(void)
 538 {
 539         DBG("");
 540
 541         connman_device_driver_unregister(&wifi_ng_driver);
 542 }
 543
 544 static int network_probe(struct connman_network *network)
 545 {
 546         DBG("network %p", network);
 547
 548         return 0;
 549 }
 550
 551 static void network_remove(struct connman_network *network)
 552 {
 553         struct connman_device *device = connman_network_get_device(network);
 554         struct wifi_data *wifi;
 555
 556         DBG("network %p", network);
 557
 558         wifi = connman_device_get_data(device);
 559         if (wifi == NULL)
 560                 return;
 561
 562         if (wifi->network != network)
 563                 return;
 564
 565         wifi->network = NULL;
 566 }
 567
 568 static void connect_callback(int result, GSupplicantInterface *interface,
 569                                                         void *user_data)
 570 {
 571         struct connman_network *network = user_data;
 572
 573         DBG("network %p result %d", network, result);
 574
 575         if (result == -ENOKEY) {
 576                 connman_network_set_error(network,
 577                                         CONNMAN_NETWORK_ERROR_INVALID_KEY);
 578         } else if (result < 0) {
 579                 connman_network_set_error(network,
 580                                         CONNMAN_NETWORK_ERROR_CONFIGURE_FAIL);
 581         }
 582 }
 583
 584 static GSupplicantSecurity network_security(const char *security)
 585 {
 586         if (g_str_equal(security, "none") == TRUE)
 587                 return G_SUPPLICANT_SECURITY_NONE;
 588         else if (g_str_equal(security, "wep") == TRUE)
 589                 return G_SUPPLICANT_SECURITY_WEP;
 590         else if (g_str_equal(security, "psk") == TRUE)
 591                 return G_SUPPLICANT_SECURITY_PSK;
 592         else if (g_str_equal(security, "wpa") == TRUE)
 593                 return G_SUPPLICANT_SECURITY_PSK;
 594         else if (g_str_equal(security, "rsn") == TRUE)
 595                 return G_SUPPLICANT_SECURITY_PSK;
 596         else if (g_str_equal(security, "ieee8021x") == TRUE)
 597                 return G_SUPPLICANT_SECURITY_IEEE8021X;
 598
 599         return G_SUPPLICANT_SECURITY_UNKNOWN;
 600 }
 601
 602 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
 603 {
 604         const char *security, *passphrase, *agent_passphrase;
 605
 606         memset(ssid, 0, sizeof(*ssid));
 607         ssid->mode = G_SUPPLICANT_MODE_INFRA;
 608         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
 609                                                 &ssid->ssid_len);
 610         ssid->scan_ssid = 1;
 611         security = connman_network_get_string(network, "WiFi.Security");
 612         ssid->security = network_security(security);
 613         passphrase = connman_network_get_string(network,
 614                                                 "WiFi.Passphrase");
 615         if (passphrase == NULL || strlen(passphrase) == 0) {
 616
 617                 /* Use agent provided passphrase as a fallback */
 618                 agent_passphrase = connman_network_get_string(network,
 619                                                 "WiFi.AgentPassphrase");
 620
 621                 if (agent_passphrase == NULL || strlen(agent_passphrase) == 0)
 622                         ssid->passphrase = NULL;
 623                 else
 624                         ssid->passphrase = agent_passphrase;
 625         } else
 626                 ssid->passphrase = passphrase;
 627
 628         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
 629
 630         /*
 631          * If our private key password is unset,
 632          * we use the supplied passphrase. That is needed
 633          * for PEAP where 2 passphrases (identity and client
 634          * cert may have to be provided.
 635          */
 636         if (connman_network_get_string(network,
 637                                         "WiFi.PrivateKeyPassphrase") == NULL)
 638                 connman_network_set_string(network,
 639                                                 "WiFi.PrivateKeyPassphrase",
 640                                                 ssid->passphrase);
 641         /* We must have an identity for both PEAP and TLS */
 642         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
 643
 644         /* Use agent provided identity as a fallback */
 645         if (ssid->identity == NULL || strlen(ssid->identity) == 0)
 646                 ssid->identity = connman_network_get_string(network,
 647                                                         "WiFi.AgentIdentity");
 648
 649         ssid->ca_cert_path = connman_network_get_string(network,
 650                                                         "WiFi.CACertFile");
 651         ssid->client_cert_path = connman_network_get_string(network,
 652                                                         "WiFi.ClientCertFile");
 653         ssid->private_key_path = connman_network_get_string(network,
 654                                                         "WiFi.PrivateKeyFile");
 655         ssid->private_key_passphrase = connman_network_get_string(network,
 656                                                 "WiFi.PrivateKeyPassphrase");
 657         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
 658
 659         ssid->use_wps = connman_network_get_bool(network, "WiFi.UseWPS");
 660         ssid->pin_wps = connman_network_get_string(network, "WiFi.PinWPS");
 661
 662 }
 663
 664 static int network_connect(struct connman_network *network)
 665 {
 666         struct connman_device *device = connman_network_get_device(network);
 667         struct wifi_data *wifi;
 668         GSupplicantInterface *interface;
 669         GSupplicantSSID *ssid;
 670
 671         DBG("network %p", network);
 672
 673         if (device == NULL)
 674                 return -ENODEV;
 675
 676         wifi = connman_device_get_data(device);
 677         if (wifi == NULL)
 678                 return -ENODEV;
 679
 680         ssid = g_try_malloc0(sizeof(GSupplicantSSID));
 681         if (ssid == NULL)
 682                 return -ENOMEM;
 683
 684         interface = wifi->interface;
 685
 686         ssid_init(ssid, network);
 687
 688         if (wifi->disconnecting == TRUE)
 689                 wifi->pending_network = network;
 690         else {
 691                 wifi->network = network;
 692                 wifi->retries = 0;
 693
 694                 return g_supplicant_interface_connect(interface, ssid,
 695                                                 connect_callback, network);
 696         }
 697
 698         return -EINPROGRESS;
 699 }
 700
 701 static void disconnect_callback(int result, GSupplicantInterface *interface,
 702                                                                 void *user_data)
 703 {
 704         struct wifi_data *wifi = user_data;
 705
 706         if (wifi->network != NULL) {
 707                 /*
 708                  * if result < 0 supplican return an error because
 709                  * the network is not current.
 710                  * we wont receive G_SUPPLICANT_STATE_DISCONNECTED since it
 711                  * failed, call connman_network_set_connected to report
 712                  * disconnect is completed.
 713                  */
 714                 if (result < 0)
 715                         connman_network_set_connected(wifi->network, FALSE);
 716         }
 717
 718         wifi->network = NULL;
 719
 720         wifi->disconnecting = FALSE;
 721
 722         if (wifi->pending_network != NULL) {
 723                 network_connect(wifi->pending_network);
 724                 wifi->pending_network = NULL;
 725         }
 726
 727 }
 728
 729 static int network_disconnect(struct connman_network *network)
 730 {
 731         struct connman_device *device = connman_network_get_device(network);
 732         struct wifi_data *wifi;
 733         int err;
 734
 735         DBG("network %p", network);
 736
 737         wifi = connman_device_get_data(device);
 738         if (wifi == NULL || wifi->interface == NULL)
 739                 return -ENODEV;
 740
 741         connman_network_set_associating(network, FALSE);
 742
 743         if (wifi->disconnecting == TRUE)
 744                 return -EALREADY;
 745
 746         wifi->disconnecting = TRUE;
 747
 748         err = g_supplicant_interface_disconnect(wifi->interface,
 749                                                 disconnect_callback, wifi);
 750         if (err < 0)
 751                 wifi->disconnecting = FALSE;
 752
 753         return err;
 754 }
 755
 756 static struct connman_network_driver network_driver = {
 757         .name           = "wifi",
 758         .type           = CONNMAN_NETWORK_TYPE_WIFI,
 759         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
 760         .probe          = network_probe,
 761         .remove         = network_remove,
 762         .connect        = network_connect,
 763         .disconnect     = network_disconnect,
 764 };
 765
 766 static void interface_added(GSupplicantInterface *interface)
 767 {
 768         const char *ifname = g_supplicant_interface_get_ifname(interface);
 769         const char *driver = g_supplicant_interface_get_driver(interface);
 770         struct wifi_data *wifi;
 771
 772         wifi = g_supplicant_interface_get_data(interface);
 773
 774         /*
 775          * We can get here with a NULL wifi pointer when
 776          * the interface added signal is sent before the
 777          * interface creation callback is called.
 778          */
 779         if (wifi == NULL)
 780                 return;
 781
 782         DBG("ifname %s driver %s wifi %p tethering %d",
 783                         ifname, driver, wifi, wifi->tethering);
 784
 785         if (wifi->device == NULL) {
 786                 connman_error("WiFi device not set");
 787                 return;
 788         }
 789
 790         connman_device_set_powered(wifi->device, TRUE);
 791
 792         if (wifi->tethering == TRUE)
 793                 return;
 794 }
 795
 796 static connman_bool_t is_idle(struct wifi_data *wifi)
 797 {
 798         DBG("state %d", wifi->state);
 799
 800         switch (wifi->state) {
 801         case G_SUPPLICANT_STATE_UNKNOWN:
 802         case G_SUPPLICANT_STATE_DISCONNECTED:
 803         case G_SUPPLICANT_STATE_INACTIVE:
 804         case G_SUPPLICANT_STATE_SCANNING:
 805                 return TRUE;
 806
 807         case G_SUPPLICANT_STATE_AUTHENTICATING:
 808         case G_SUPPLICANT_STATE_ASSOCIATING:
 809         case G_SUPPLICANT_STATE_ASSOCIATED:
 810         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
 811         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
 812         case G_SUPPLICANT_STATE_COMPLETED:
 813                 return FALSE;
 814         }
 815
 816         return FALSE;
 817 }
 818
 819 static connman_bool_t is_idle_wps(GSupplicantInterface *interface,
 820                                                 struct wifi_data *wifi)
 821 {
 822         /* First, let's check if WPS processing did not went wrong */
 823         if (g_supplicant_interface_get_wps_state(interface) ==
 824                 G_SUPPLICANT_WPS_STATE_FAIL)
 825                 return FALSE;
 826
 827         /* Unlike normal connection, being associated while processing wps
 828          * actually means that we are idling. */
 829         switch (wifi->state) {
 830         case G_SUPPLICANT_STATE_UNKNOWN:
 831         case G_SUPPLICANT_STATE_DISCONNECTED:
 832         case G_SUPPLICANT_STATE_INACTIVE:
 833         case G_SUPPLICANT_STATE_SCANNING:
 834         case G_SUPPLICANT_STATE_ASSOCIATED:
 835                 return TRUE;
 836         case G_SUPPLICANT_STATE_AUTHENTICATING:
 837         case G_SUPPLICANT_STATE_ASSOCIATING:
 838         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
 839         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
 840         case G_SUPPLICANT_STATE_COMPLETED:
 841                 return FALSE;
 842         }
 843
 844         return FALSE;
 845 }
 846
 847 static connman_bool_t handle_wps_completion(GSupplicantInterface *interface,
 848                                         struct connman_network *network,
 849                                         struct connman_device *device,
 850                                         struct wifi_data *wifi)
 851 {
 852         connman_bool_t wps;
 853
 854         wps = connman_network_get_bool(network, "WiFi.UseWPS");
 855         if (wps == TRUE) {
 856                 const unsigned char *ssid, *wps_ssid;
 857                 unsigned int ssid_len, wps_ssid_len;
 858                 const char *wps_key;
 859
 860                 /* Checking if we got associated with requested
 861                  * network */
 862                 ssid = connman_network_get_blob(network, "WiFi.SSID",
 863                                                 &ssid_len);
 864
 865                 wps_ssid = g_supplicant_interface_get_wps_ssid(
 866                         interface, &wps_ssid_len);
 867
 868                 if (wps_ssid == NULL || wps_ssid_len != ssid_len ||
 869                                 memcmp(ssid, wps_ssid, ssid_len) != 0) {
 870                         connman_network_set_associating(network, FALSE);
 871                         g_supplicant_interface_disconnect(wifi->interface,
 872                                                 disconnect_callback, wifi);
 873                         return FALSE;
 874                 }
 875
 876                 wps_key = g_supplicant_interface_get_wps_key(interface);
 877                 connman_network_set_string(network, "WiFi.Passphrase",
 878                                         wps_key);
 879
 880                 connman_network_set_string(network, "WiFi.PinWPS", NULL);
 881         }
 882
 883         return TRUE;
 884 }
 885
 886 static connman_bool_t handle_4way_handshake_failure(GSupplicantInterface *interface,
 887                                         struct connman_network *network,
 888                                         struct wifi_data *wifi)
 889 {
 890         if (wifi->state != G_SUPPLICANT_STATE_4WAY_HANDSHAKE)
 891                 return FALSE;
 892
 893         wifi->retries++;
 894
 895         if (wifi->retries < MAXIMUM_RETRIES)
 896                 return TRUE;
 897
 898         /* We disable the selected network, if not then
 899          * wpa_supplicant will loop retrying */
 900         if (g_supplicant_interface_enable_selected_network(interface,
 901                                                                 FALSE) != 0)
 902                 DBG("Could not disables selected network");
 903
 904         connman_network_set_error(network, CONNMAN_NETWORK_ERROR_INVALID_KEY);
 905
 906         return FALSE;
 907 }
 908
 909 static void interface_state(GSupplicantInterface *interface)
 910 {
 911         struct connman_network *network;
 912         struct connman_device *device;
 913         struct wifi_data *wifi;
 914         GSupplicantState state = g_supplicant_interface_get_state(interface);
 915         connman_bool_t wps;
 916
 917         wifi = g_supplicant_interface_get_data(interface);
 918
 919         DBG("wifi %p interface state %d", wifi, state);
 920
 921         if (wifi == NULL)
 922                 return;
 923
 924         network = wifi->network;
 925         device = wifi->device;
 926
 927         if (device == NULL || network == NULL)
 928                 return;
 929
 930         switch (state) {
 931         case G_SUPPLICANT_STATE_SCANNING:
 932                 break;
 933
 934         case G_SUPPLICANT_STATE_AUTHENTICATING:
 935         case G_SUPPLICANT_STATE_ASSOCIATING:
 936                 connman_network_set_associating(network, TRUE);
 937                 break;
 938
 939         case G_SUPPLICANT_STATE_COMPLETED:
 940                 if (handle_wps_completion(interface, network, device, wifi) ==
 941                                                                         FALSE)
 942                         break;
 943
 944                 /* reset scan trigger and schedule background scan */
 945                 connman_device_schedule_scan(device);
 946
 947                 connman_network_set_connected(network, TRUE);
 948                 break;
 949
 950         case G_SUPPLICANT_STATE_DISCONNECTED:
 951                 /*
 952                  * If we're in one of the idle modes, we have
 953                  * not started association yet and thus setting
 954                  * those ones to FALSE could cancel an association
 955                  * in progress.
 956                  */
 957                 wps = connman_network_get_bool(network, "WiFi.UseWPS");
 958                 if (wps == TRUE)
 959                         if (is_idle_wps(interface, wifi) == TRUE)
 960                                 break;
 961
 962                 if (is_idle(wifi))
 963                         break;
 964
 965                 /* If previous state was 4way-handshake, then
 966                  * it's either: psk was incorrect and thus we retry
 967                  * or if we reach the maximum retries we declare the
 968                  * psk as wrong */
 969                 if (handle_4way_handshake_failure(interface,
 970                                                 network, wifi) == TRUE)
 971                         break;
 972
 973                 connman_network_set_associating(network, FALSE);
 974                 connman_network_set_connected(network, FALSE);
 975                 break;
 976
 977         case G_SUPPLICANT_STATE_INACTIVE:
 978                 connman_network_set_associating(network, FALSE);
 979                 break;
 980
 981         case G_SUPPLICANT_STATE_UNKNOWN:
 982         case G_SUPPLICANT_STATE_ASSOCIATED:
 983         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
 984         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
 985                 break;
 986         }
 987
 988         wifi->state = state;
 989
 990         DBG("DONE");
 991 }
 992
 993 static void interface_removed(GSupplicantInterface *interface)
 994 {
 995         const char *ifname = g_supplicant_interface_get_ifname(interface);
 996         struct wifi_data *wifi;
 997
 998         DBG("ifname %s", ifname);
 999
1000         wifi = g_supplicant_interface_get_data(interface);
1001
1002         if (wifi != NULL && wifi->tethering == TRUE)
1003                 return;
1004
1005         if (wifi == NULL || wifi->device == NULL) {
1006                 connman_error("Wrong wifi pointer");
1007                 return;
1008         }
1009
1010         connman_device_set_powered(wifi->device, FALSE);
1011 }
1012
1013 static void scan_started(GSupplicantInterface *interface)
1014 {
1015         DBG("");
1016 }
1017
1018 static void scan_finished(GSupplicantInterface *interface)
1019 {
1020         DBG("");
1021 }
1022
1023 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
1024 {
1025         unsigned char strength;
1026
1027         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
1028         if (strength > 100)
1029                 strength = 100;
1030
1031         return strength;
1032 }
1033
1034 static void network_added(GSupplicantNetwork *supplicant_network)
1035 {
1036         struct connman_network *network;
1037         GSupplicantInterface *interface;
1038         struct wifi_data *wifi;
1039         const char *name, *identifier, *security, *group;
1040         const unsigned char *ssid;
1041         unsigned int ssid_len;
1042         connman_bool_t wps;
1043
1044         DBG("");
1045
1046         interface = g_supplicant_network_get_interface(supplicant_network);
1047         wifi = g_supplicant_interface_get_data(interface);
1048         name = g_supplicant_network_get_name(supplicant_network);
1049         identifier = g_supplicant_network_get_identifier(supplicant_network);
1050         security = g_supplicant_network_get_security(supplicant_network);
1051         group = g_supplicant_network_get_identifier(supplicant_network);
1052         wps = g_supplicant_network_get_wps(supplicant_network);
1053
1054         if (wifi == NULL)
1055                 return;
1056
1057         ssid = g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
1058
1059         network = connman_device_get_network(wifi->device, identifier);
1060
1061         if (network == NULL) {
1062                 network = connman_network_create(identifier,
1063                                                 CONNMAN_NETWORK_TYPE_WIFI);
1064                 if (network == NULL)
1065                         return;
1066
1067                 connman_network_set_index(network, wifi->index);
1068
1069                 if (connman_device_add_network(wifi->device, network) < 0) {
1070                         connman_network_unref(network);
1071                         return;
1072                 }
1073
1074                 wifi->networks = g_slist_append(wifi->networks, network);
1075         }
1076
1077         if (name != NULL && name[0] != '\0')
1078                 connman_network_set_name(network, name);
1079
1080         connman_network_set_blob(network, "WiFi.SSID",
1081                                                 ssid, ssid_len);
1082         connman_network_set_string(network, "WiFi.Security", security);
1083         connman_network_set_strength(network,
1084                                 calculate_strength(supplicant_network));
1085         connman_network_set_bool(network, "WiFi.WPS", wps);
1086
1087         connman_network_set_frequency(network,
1088                         g_supplicant_network_get_frequency(supplicant_network));
1089
1090         connman_network_set_available(network, TRUE);
1091
1092         if (ssid != NULL)
1093                 connman_network_set_group(network, group);
1094 }
1095
1096 static void network_removed(GSupplicantNetwork *network)
1097 {
1098         GSupplicantInterface *interface;
1099         struct wifi_data *wifi;
1100         const char *name, *identifier;
1101         struct connman_network *connman_network;
1102
1103         interface = g_supplicant_network_get_interface(network);
1104         wifi = g_supplicant_interface_get_data(interface);
1105         identifier = g_supplicant_network_get_identifier(network);
1106         name = g_supplicant_network_get_name(network);
1107
1108         DBG("name %s", name);
1109
1110         if (wifi == NULL)
1111                 return;
1112
1113         connman_network = connman_device_get_network(wifi->device, identifier);
1114         if (connman_network == NULL)
1115                 return;
1116
1117         wifi->networks = g_slist_remove(wifi->networks, connman_network);
1118
1119         connman_device_remove_network(wifi->device, connman_network);
1120         connman_network_unref(connman_network);
1121 }
1122
1123 static void network_changed(GSupplicantNetwork *network, const char *property)
1124 {
1125         GSupplicantInterface *interface;
1126         struct wifi_data *wifi;
1127         const char *name, *identifier;
1128         struct connman_network *connman_network;
1129
1130         interface = g_supplicant_network_get_interface(network);
1131         wifi = g_supplicant_interface_get_data(interface);
1132         identifier = g_supplicant_network_get_identifier(network);
1133         name = g_supplicant_network_get_name(network);
1134
1135         DBG("name %s", name);
1136
1137         if (wifi == NULL)
1138                 return;
1139
1140         connman_network = connman_device_get_network(wifi->device, identifier);
1141         if (connman_network == NULL)
1142                 return;
1143
1144         if (g_str_equal(property, "Signal") == TRUE) {
1145                connman_network_set_strength(connman_network,
1146                                         calculate_strength(network));
1147                connman_network_update(connman_network);
1148         }
1149 }
1150
1151 static void debug(const char *str)
1152 {
1153         if (getenv("CONNMAN_SUPPLICANT_DEBUG"))
1154                 connman_debug("%s", str);
1155 }
1156
1157 static const GSupplicantCallbacks callbacks = {
1158         .system_ready           = system_ready,
1159         .system_killed          = system_killed,
1160         .interface_added        = interface_added,
1161         .interface_state        = interface_state,
1162         .interface_removed      = interface_removed,
1163         .scan_started           = scan_started,
1164         .scan_finished          = scan_finished,
1165         .network_added          = network_added,
1166         .network_removed        = network_removed,
1167         .network_changed        = network_changed,
1168         .debug                  = debug,
1169 };
1170
1171
1172 static int tech_probe(struct connman_technology *technology)
1173 {
1174         wifi_technology = technology;
1175
1176         return 0;
1177 }
1178
1179 static void tech_remove(struct connman_technology *technology)
1180 {
1181         wifi_technology = NULL;
1182 }
1183
1184 struct wifi_tethering_info {
1185         struct wifi_data *wifi;
1186         struct connman_technology *technology;
1187         char *ifname;
1188         GSupplicantSSID *ssid;
1189 };
1190
1191 static GSupplicantSSID *ssid_ap_init(const char *ssid, const char *passphrase)
1192 {
1193         GSupplicantSSID *ap;
1194
1195         ap = g_try_malloc0(sizeof(GSupplicantSSID));
1196         if (ap == NULL)
1197                 return NULL;
1198
1199         ap->mode = G_SUPPLICANT_MODE_MASTER;
1200         ap->ssid = ssid;
1201         ap->ssid_len = strlen(ssid);
1202         ap->scan_ssid = 0;
1203         ap->freq = 2412;
1204
1205         if (passphrase == NULL || strlen(passphrase) == 0) {
1206                 ap->security = G_SUPPLICANT_SECURITY_NONE;
1207                 ap->passphrase = NULL;
1208         } else {
1209                ap->security = G_SUPPLICANT_SECURITY_PSK;
1210                ap->protocol = G_SUPPLICANT_PROTO_RSN;
1211                ap->pairwise_cipher = G_SUPPLICANT_PAIRWISE_CCMP;
1212                ap->group_cipher = G_SUPPLICANT_GROUP_CCMP;
1213                ap->passphrase = passphrase;
1214         }
1215
1216         return ap;
1217 }
1218
1219 static void ap_start_callback(int result, GSupplicantInterface *interface,
1220                                                         void *user_data)
1221 {
1222         struct wifi_tethering_info *info = user_data;
1223
1224         DBG("result %d index %d bridge %s",
1225                 result, info->wifi->index, info->wifi->bridge);
1226
1227         if (result < 0) {
1228                 connman_inet_remove_from_bridge(info->wifi->index,
1229                                                         info->wifi->bridge);
1230                 connman_technology_tethering_notify(info->technology, FALSE);
1231         }
1232
1233         g_free(info->ifname);
1234         g_free(info);
1235 }
1236
1237 static void ap_create_callback(int result,
1238                                 GSupplicantInterface *interface,
1239                                         void *user_data)
1240 {
1241         struct wifi_tethering_info *info = user_data;
1242
1243         DBG("result %d ifname %s", result,
1244                                 g_supplicant_interface_get_ifname(interface));
1245
1246         if (result < 0) {
1247                 connman_inet_remove_from_bridge(info->wifi->index,
1248                                                         info->wifi->bridge);
1249                 connman_technology_tethering_notify(info->technology, FALSE);
1250
1251                 g_free(info->ifname);
1252                 g_free(info);
1253                 return;
1254         }
1255
1256         info->wifi->interface = interface;
1257         g_supplicant_interface_set_data(interface, info->wifi);
1258
1259         if (g_supplicant_interface_set_apscan(interface, 2) < 0)
1260                 connman_error("Failed to set interface ap_scan property");
1261
1262         g_supplicant_interface_connect(interface, info->ssid,
1263                                                 ap_start_callback, info);
1264 }
1265
1266 static void sta_remove_callback(int result,
1267                                 GSupplicantInterface *interface,
1268                                         void *user_data)
1269 {
1270         struct wifi_tethering_info *info = user_data;
1271         const char *driver = connman_option_get_string("wifi");
1272
1273         DBG("ifname %s result %d ", info->ifname, result);
1274
1275         if (result < 0) {
1276                 info->wifi->tethering = TRUE;
1277
1278                 g_free(info->ifname);
1279                 g_free(info);
1280                 return;
1281         }
1282
1283         info->wifi->interface = NULL;
1284
1285         connman_technology_tethering_notify(info->technology, TRUE);
1286
1287         g_supplicant_interface_create(info->ifname, driver, info->wifi->bridge,
1288                                                 ap_create_callback,
1289                                                         info);
1290 }
1291
1292 static int tech_set_tethering(struct connman_technology *technology,
1293                                 const char *identifier, const char *passphrase,
1294                                 const char *bridge, connman_bool_t enabled)
1295 {
1296         GList *list;
1297         GSupplicantInterface *interface;
1298         struct wifi_data *wifi;
1299         struct wifi_tethering_info *info;
1300         const char *ifname;
1301         unsigned int mode;
1302         int err;
1303
1304         DBG("");
1305
1306         if (enabled == FALSE) {
1307                 for (list = iface_list; list; list = list->next) {
1308                         wifi = list->data;
1309
1310                         if (wifi->tethering == TRUE) {
1311                                 wifi->tethering = FALSE;
1312
1313                                 connman_inet_remove_from_bridge(wifi->index,
1314                                                                         bridge);
1315                                 wifi->bridged = FALSE;
1316                         }
1317                 }
1318
1319                 connman_technology_tethering_notify(technology, FALSE);
1320
1321                 return 0;
1322         }
1323
1324         for (list = iface_list; list; list = list->next) {
1325                 wifi = list->data;
1326
1327                 interface = wifi->interface;
1328
1329                 if (interface == NULL)
1330                         continue;
1331
1332                 ifname = g_supplicant_interface_get_ifname(wifi->interface);
1333
1334                 mode = g_supplicant_interface_get_mode(interface);
1335                 if ((mode & G_SUPPLICANT_CAPABILITY_MODE_AP) == 0) {
1336                         DBG("%s does not support AP mode", ifname);
1337                         continue;
1338                 }
1339
1340                 info = g_try_malloc0(sizeof(struct wifi_tethering_info));
1341                 if (info == NULL)
1342                         return -ENOMEM;
1343
1344                 info->wifi = wifi;
1345                 info->technology = technology;
1346                 info->wifi->bridge = bridge;
1347                 info->ssid = ssid_ap_init(identifier, passphrase);
1348                 if (info->ssid == NULL) {
1349                         g_free(info);
1350                         continue;
1351                 }
1352                 info->ifname = g_strdup(ifname);
1353                 if (info->ifname == NULL) {
1354                         g_free(info);
1355                         continue;
1356                 }
1357
1358                 info->wifi->tethering = TRUE;
1359
1360                 err = g_supplicant_interface_remove(interface,
1361                                                 sta_remove_callback,
1362                                                         info);
1363                 if (err == 0)
1364                         return err;
1365         }
1366
1367         return -EOPNOTSUPP;
1368 }
1369
1370 static void regdom_callback(void *user_data)
1371 {
1372         char *alpha2 = user_data;
1373
1374         DBG("");
1375
1376         if (wifi_technology == NULL)
1377                 return;
1378
1379         connman_technology_regdom_notify(wifi_technology, alpha2);
1380 }
1381
1382 static int tech_set_regdom(struct connman_technology *technology, const char *alpha2)
1383 {
1384         return g_supplicant_set_country(alpha2, regdom_callback, alpha2);
1385 }
1386
1387 static struct connman_technology_driver tech_driver = {
1388         .name           = "wifi",
1389         .type           = CONNMAN_SERVICE_TYPE_WIFI,
1390         .probe          = tech_probe,
1391         .remove         = tech_remove,
1392         .set_tethering  = tech_set_tethering,
1393         .set_regdom     = tech_set_regdom,
1394 };
1395
1396 static int wifi_init(void)
1397 {
1398         int err;
1399
1400         err = connman_network_driver_register(&network_driver);
1401         if (err < 0)
1402                 return err;
1403
1404         err = g_supplicant_register(&callbacks);
1405         if (err < 0) {
1406                 connman_network_driver_unregister(&network_driver);
1407                 return err;
1408         }
1409
1410         err = connman_technology_driver_register(&tech_driver);
1411         if (err < 0) {
1412                 g_supplicant_unregister(&callbacks);
1413                 connman_network_driver_unregister(&network_driver);
1414                 return err;
1415         }
1416
1417         return 0;
1418 }
1419
1420 static void wifi_exit(void)
1421 {
1422         DBG();
1423
1424         connman_technology_driver_unregister(&tech_driver);
1425
1426         g_supplicant_unregister(&callbacks);
1427
1428         connman_network_driver_unregister(&network_driver);
1429 }
1430
1431 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
1432                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)