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 <string.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/socket.h>
  32 #include <linux/if_arp.h>
  33 #include <linux/wireless.h>
  34 #include <net/ethernet.h>
  35
  36 #ifndef IFF_LOWER_UP
  37 #define IFF_LOWER_UP    0x10000
  38 #endif
  39
  40 #include <dbus/dbus.h>
  41 #include <glib.h>
  42
  43 #define CONNMAN_API_SUBJECT_TO_CHANGE
  44 #include <connman/plugin.h>
  45 #include <connman/inet.h>
  46 #include <connman/device.h>
  47 #include <connman/rtnl.h>
  48 #include <connman/technology.h>
  49 #include <connman/log.h>
  50 #include <connman/option.h>
  51
  52 #include <gsupplicant/gsupplicant.h>
  53
  54 #define CLEANUP_TIMEOUT   8     /* in seconds */
  55 #define INACTIVE_TIMEOUT  12    /* in seconds */
  56
  57 struct connman_technology *wifi_technology = NULL;
  58
  59 struct wifi_data {
  60         char *identifier;
  61         struct connman_device *device;
  62         struct connman_network *network;
  63         struct connman_network *pending_network;
  64         GSupplicantInterface *interface;
  65         connman_bool_t connected;
  66         connman_bool_t disconnecting;
  67         int index;
  68         unsigned flags;
  69         unsigned int watch;
  70 };
  71
  72 static int get_bssid(struct connman_device *device,
  73                                 unsigned char *bssid, unsigned int *bssid_len)
  74 {
  75         struct iwreq wrq;
  76         char *ifname;
  77         int ifindex;
  78         int fd, err;
  79
  80         ifindex = connman_device_get_index(device);
  81         if (ifindex < 0)
  82                 return -EINVAL;
  83
  84         ifname = connman_inet_ifname(ifindex);
  85         if (ifname == NULL)
  86                 return -EINVAL;
  87
  88         fd = socket(PF_INET, SOCK_DGRAM, 0);
  89         if (fd < 0) {
  90                 g_free(ifname);
  91                 return -EINVAL;
  92         }
  93
  94         memset(&wrq, 0, sizeof(wrq));
  95         strncpy(wrq.ifr_name, ifname, IFNAMSIZ);
  96
  97         err = ioctl(fd, SIOCGIWAP, &wrq);
  98
  99         g_free(ifname);
 100         close(fd);
 101
 102         if (err < 0)
 103                 return -EIO;
 104
 105         memcpy(bssid, wrq.u.ap_addr.sa_data, ETH_ALEN);
 106         *bssid_len = ETH_ALEN;
 107
 108         return 0;
 109 }
 110
 111 static void wifi_newlink(unsigned flags, unsigned change, void *user_data)
 112 {
 113         struct connman_device *device = user_data;
 114         struct wifi_data *wifi = connman_device_get_data(device);
 115
 116         DBG("index %d flags %d change %d", wifi->index, flags, change);
 117
 118         if (!change)
 119                 return;
 120
 121         if ((wifi->flags & IFF_UP) != (flags & IFF_UP)) {
 122                 if (flags & IFF_UP)
 123                         DBG("interface up");
 124                 else
 125                         DBG("interface down");
 126         }
 127
 128         if ((wifi->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 129                 if (flags & IFF_LOWER_UP)
 130                         DBG("carrier on");
 131                 else
 132                         DBG("carrier off");
 133         }
 134
 135         wifi->flags = flags;
 136 }
 137
 138 static int wifi_probe(struct connman_device *device)
 139 {
 140         struct wifi_data *wifi;
 141
 142         DBG("device %p", device);
 143
 144         wifi = g_try_new0(struct wifi_data, 1);
 145         if (wifi == NULL)
 146                 return -ENOMEM;
 147
 148         wifi->connected = FALSE;
 149         wifi->disconnecting = FALSE;
 150
 151         connman_device_set_data(device, wifi);
 152         wifi->device = connman_device_ref(device);
 153
 154         wifi->index = connman_device_get_index(device);
 155         wifi->flags = 0;
 156
 157         wifi->watch = connman_rtnl_add_newlink_watch(wifi->index,
 158                                                         wifi_newlink, device);
 159
 160         return 0;
 161 }
 162
 163 static void wifi_remove(struct connman_device *device)
 164 {
 165         struct wifi_data *wifi = connman_device_get_data(device);
 166
 167         DBG("device %p", device);
 168
 169         if (wifi->pending_network != NULL) {
 170                 connman_network_unref(wifi->pending_network);
 171                 wifi->pending_network = NULL;
 172         }
 173
 174         connman_device_set_data(device, NULL);
 175         connman_device_unref(wifi->device);
 176         connman_rtnl_remove_watch(wifi->watch);
 177
 178         g_supplicant_interface_set_data(wifi->interface, NULL);
 179
 180         g_free(wifi->identifier);
 181         g_free(wifi);
 182 }
 183
 184 static void interface_create_callback(int result,
 185                                         GSupplicantInterface *interface,
 186                                                         void *user_data)
 187 {
 188         struct wifi_data *wifi = user_data;
 189
 190         DBG("result %d ifname %s", result,
 191                                 g_supplicant_interface_get_ifname(interface));
 192
 193         if (result < 0)
 194                 return;
 195
 196         wifi->interface = interface;
 197         g_supplicant_interface_set_data(interface, wifi);
 198 }
 199
 200 static void interface_remove_callback(int result,
 201                                         GSupplicantInterface *interface,
 202                                                         void *user_data)
 203 {
 204         struct wifi_data *wifi = user_data;
 205
 206         DBG("result %d", result);
 207
 208         if (result < 0)
 209                 return;
 210
 211         wifi->interface = NULL;
 212 }
 213
 214
 215 static int wifi_enable(struct connman_device *device)
 216 {
 217         struct wifi_data *wifi = connman_device_get_data(device);
 218         const char *interface = connman_device_get_string(device, "Interface");
 219         const char *driver = connman_option_get_string("wifi");
 220
 221         DBG("device %p %p", device, wifi);
 222
 223         return g_supplicant_interface_create(interface, driver,
 224                                                 interface_create_callback,
 225                                                         wifi);
 226 }
 227
 228 static int wifi_disable(struct connman_device *device)
 229 {
 230         struct wifi_data *wifi = connman_device_get_data(device);
 231
 232         DBG("device %p", device);
 233
 234         wifi->connected = FALSE;
 235         wifi->disconnecting = FALSE;
 236
 237         if (wifi->pending_network != NULL) {
 238                 connman_network_unref(wifi->pending_network);
 239                 wifi->pending_network = NULL;
 240         }
 241
 242         return g_supplicant_interface_remove(wifi->interface,
 243                                                 interface_remove_callback,
 244                                                         wifi);
 245 }
 246
 247 static void scan_callback(int result, GSupplicantInterface *interface,
 248                                                 void *user_data)
 249 {
 250         struct connman_device *device = user_data;
 251
 252         DBG("result %d", result);
 253
 254         connman_device_set_scanning(device, FALSE);
 255 }
 256
 257 static int wifi_scan(struct connman_device *device)
 258 {
 259         struct wifi_data *wifi = connman_device_get_data(device);
 260
 261         DBG("device %p %p", device, wifi->interface);
 262
 263         return g_supplicant_interface_scan(wifi->interface, scan_callback,
 264                                                                 device);
 265 }
 266
 267 static struct connman_device_driver wifi_ng_driver = {
 268         .name           = "wifi",
 269         .type           = CONNMAN_DEVICE_TYPE_WIFI,
 270         .priority       = CONNMAN_DEVICE_PRIORITY_LOW,
 271         .probe          = wifi_probe,
 272         .remove         = wifi_remove,
 273         .enable         = wifi_enable,
 274         .disable        = wifi_disable,
 275         .scan           = wifi_scan,
 276 };
 277
 278 static void system_ready(void)
 279 {
 280         DBG("");
 281
 282         if (connman_device_driver_register(&wifi_ng_driver) < 0)
 283                 connman_error("Failed to register WiFi driver");
 284 }
 285
 286 static void system_killed(void)
 287 {
 288         DBG("");
 289
 290         connman_device_driver_unregister(&wifi_ng_driver);
 291 }
 292
 293 static void interface_added(GSupplicantInterface *interface)
 294 {
 295         const char *ifname = g_supplicant_interface_get_ifname(interface);
 296         const char *driver = g_supplicant_interface_get_driver(interface);
 297         struct wifi_data *wifi;
 298
 299         wifi = g_supplicant_interface_get_data(interface);
 300
 301         /*
 302          * We can get here with a NULL wifi pointer when
 303          * the interface added signal is sent before the
 304          * interface creation callback is called.
 305          */
 306         if (wifi == NULL)
 307                 return;
 308
 309         DBG("ifname %s driver %s wifi %p", ifname, driver, wifi);
 310
 311         if (wifi->device == NULL) {
 312                 connman_error("WiFi device not set");
 313                 return;
 314         }
 315
 316         connman_device_set_powered(wifi->device, TRUE);
 317         wifi_scan(wifi->device);
 318 }
 319
 320 static void interface_state(GSupplicantInterface *interface)
 321 {
 322         struct connman_network *network;
 323         struct connman_device *device;
 324         struct wifi_data *wifi;
 325         GSupplicantState state = g_supplicant_interface_get_state(interface);
 326         unsigned char bssid[ETH_ALEN];
 327         unsigned int bssid_len;
 328
 329         wifi = g_supplicant_interface_get_data(interface);
 330
 331         DBG("wifi %p interface state %d", wifi, state);
 332
 333         if (wifi == NULL)
 334                 return;
 335
 336         network = wifi->network;
 337         device = wifi->device;
 338
 339         if (device == NULL || network == NULL)
 340                 return;
 341
 342         switch (state) {
 343         case G_SUPPLICANT_STATE_SCANNING:
 344                 connman_device_set_scanning(device, TRUE);
 345                 break;
 346
 347         case G_SUPPLICANT_STATE_AUTHENTICATING:
 348         case G_SUPPLICANT_STATE_ASSOCIATING:
 349                 connman_network_set_associating(network, TRUE);
 350                 break;
 351
 352         case G_SUPPLICANT_STATE_COMPLETED:
 353                 /* reset scan trigger and schedule background scan */
 354                 connman_device_schedule_scan(device);
 355
 356                 if (get_bssid(device, bssid, &bssid_len) == 0)
 357                         connman_network_set_address(network,
 358                                                         bssid, bssid_len);
 359                 connman_network_set_connected(network, TRUE);
 360                 break;
 361
 362         case G_SUPPLICANT_STATE_DISCONNECTED:
 363                 connman_network_set_associating(network, FALSE);
 364                 connman_network_set_connected(network, FALSE);
 365                 break;
 366
 367         case G_SUPPLICANT_STATE_INACTIVE:
 368                 connman_network_set_associating(network, FALSE);
 369                 break;
 370
 371         case G_SUPPLICANT_STATE_UNKNOWN:
 372         case G_SUPPLICANT_STATE_ASSOCIATED:
 373         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
 374         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
 375                 break;
 376         }
 377
 378         DBG("DONE");
 379 }
 380
 381 static void interface_removed(GSupplicantInterface *interface)
 382 {
 383         const char *ifname = g_supplicant_interface_get_ifname(interface);
 384         struct wifi_data *wifi;
 385
 386         DBG("ifname %s", ifname);
 387
 388         wifi = g_supplicant_interface_get_data(interface);
 389
 390         if (wifi == NULL || wifi->device == NULL) {
 391                 connman_error("Wrong wifi pointer");
 392                 return;
 393         }
 394
 395         connman_device_set_powered(wifi->device, FALSE);
 396 }
 397
 398 static void scan_started(GSupplicantInterface *interface)
 399 {
 400         struct wifi_data *wifi;
 401
 402         DBG("");
 403
 404         wifi = g_supplicant_interface_get_data(interface);
 405
 406         if (wifi == NULL)
 407                 return;
 408
 409         if (wifi->device)
 410                 connman_device_set_scanning(wifi->device, TRUE);
 411 }
 412
 413 static void scan_finished(GSupplicantInterface *interface)
 414 {
 415         struct wifi_data *wifi;
 416
 417         DBG("");
 418
 419         wifi = g_supplicant_interface_get_data(interface);
 420
 421         if (wifi == NULL)
 422                 return;
 423 }
 424
 425 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
 426 {
 427         unsigned char strength;
 428
 429         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
 430         if (strength > 100)
 431                 strength = 100;
 432
 433         return strength;
 434 }
 435
 436 static void network_added(GSupplicantNetwork *supplicant_network)
 437 {
 438         struct connman_network *network;
 439         GSupplicantInterface *interface;
 440         struct wifi_data *wifi;
 441         const char *name, *identifier, *mode, *security, *group;
 442         const unsigned char *ssid;
 443         unsigned int ssid_len;
 444
 445         DBG("");
 446
 447         interface = g_supplicant_network_get_interface(supplicant_network);
 448         wifi = g_supplicant_interface_get_data(interface);
 449         name = g_supplicant_network_get_name(supplicant_network);
 450         identifier = g_supplicant_network_get_identifier(supplicant_network);
 451         mode = g_supplicant_network_get_mode(supplicant_network);
 452         security = g_supplicant_network_get_security(supplicant_network);
 453         group = g_supplicant_network_get_identifier(supplicant_network);
 454
 455         if (wifi == NULL)
 456                 return;
 457
 458         ssid = g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
 459
 460         network = connman_device_get_network(wifi->device, identifier);
 461
 462         if (network == NULL) {
 463                 network = connman_network_create(identifier,
 464                                                 CONNMAN_NETWORK_TYPE_WIFI);
 465                 if (network == NULL)
 466                         return;
 467
 468                 connman_network_set_index(network, wifi->index);
 469
 470                 if (connman_device_add_network(wifi->device, network) < 0) {
 471                         connman_network_unref(network);
 472                         return;
 473                 }
 474         }
 475
 476         if (name != NULL && name[0] != '\0')
 477                 connman_network_set_name(network, name);
 478
 479         connman_network_set_blob(network, "WiFi.SSID",
 480                                                 ssid, ssid_len);
 481         connman_network_set_string(network, "WiFi.Mode", mode);
 482         connman_network_set_string(network, "WiFi.Security", security);
 483         connman_network_set_strength(network,
 484                                 calculate_strength(supplicant_network));
 485
 486         connman_network_set_available(network, TRUE);
 487
 488         if (ssid != NULL)
 489                 connman_network_set_group(network, group);
 490 }
 491
 492 static void network_removed(GSupplicantNetwork *network)
 493 {
 494         const char *name = g_supplicant_network_get_name(network);
 495
 496         DBG("* name %s", name);
 497 }
 498
 499 static void debug(const char *str)
 500 {
 501         if (getenv("CONNMAN_SUPPLICANT_DEBUG"))
 502                 connman_debug("%s", str);
 503 }
 504
 505 static const GSupplicantCallbacks callbacks = {
 506         .system_ready           = system_ready,
 507         .system_killed          = system_killed,
 508         .interface_added        = interface_added,
 509         .interface_state        = interface_state,
 510         .interface_removed      = interface_removed,
 511         .scan_started           = scan_started,
 512         .scan_finished          = scan_finished,
 513         .network_added          = network_added,
 514         .network_removed        = network_removed,
 515         .debug                  = debug,
 516 };
 517
 518
 519 static int network_probe(struct connman_network *network)
 520 {
 521         DBG("network %p", network);
 522
 523         return 0;
 524 }
 525
 526 static void network_remove(struct connman_network *network)
 527 {
 528         DBG("network %p", network);
 529 }
 530
 531 static void connect_callback(int result, GSupplicantInterface *interface,
 532                                                         void *user_data)
 533 {
 534         connman_error("%s", __func__);
 535 }
 536
 537 static GSupplicantSecurity network_security(const char *security)
 538 {
 539         if (g_str_equal(security, "none") == TRUE)
 540                 return G_SUPPLICANT_SECURITY_NONE;
 541         else if (g_str_equal(security, "wep") == TRUE)
 542                 return G_SUPPLICANT_SECURITY_WEP;
 543         else if (g_str_equal(security, "psk") == TRUE)
 544                 return G_SUPPLICANT_SECURITY_PSK;
 545         else if (g_str_equal(security, "wpa") == TRUE)
 546                 return G_SUPPLICANT_SECURITY_PSK;
 547         else if (g_str_equal(security, "rsn") == TRUE)
 548                 return G_SUPPLICANT_SECURITY_PSK;
 549         else if (g_str_equal(security, "ieee8021x") == TRUE)
 550                 return G_SUPPLICANT_SECURITY_IEEE8021X;
 551
 552         return G_SUPPLICANT_SECURITY_UNKNOWN;
 553 }
 554
 555 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
 556 {
 557         const char *security;
 558
 559         memset(ssid, 0, sizeof(*ssid));
 560         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
 561                                                 &ssid->ssid_len);
 562         security = connman_network_get_string(network, "WiFi.Security");
 563         ssid->security = network_security(security);
 564         ssid->passphrase = connman_network_get_string(network,
 565                                                         "WiFi.Passphrase");
 566         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
 567
 568         /*
 569          * If our private key password is unset,
 570          * we use the supplied passphrase. That is needed
 571          * for PEAP where 2 passphrases (identity and client
 572          * cert may have to be provided.
 573          */
 574         if (connman_network_get_string(network,
 575                                         "WiFi.PrivateKeyPassphrase") == NULL)
 576                 connman_network_set_string(network,
 577                                                 "WiFi.PrivateKeyPassphrase",
 578                                                 ssid->passphrase);
 579         /* We must have an identity for both PEAP and TLS */
 580         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
 581         ssid->ca_cert_path = connman_network_get_string(network,
 582                                                         "WiFi.CACertFile");
 583         ssid->client_cert_path = connman_network_get_string(network,
 584                                                         "WiFi.ClientCertFile");
 585         ssid->private_key_path = connman_network_get_string(network,
 586                                                         "WiFi.PrivateKeyFile");
 587         ssid->private_key_passphrase = connman_network_get_string(network,
 588                                                 "WiFi.PrivateKeyPassphrase");
 589         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
 590
 591 }
 592
 593 static int network_connect(struct connman_network *network)
 594 {
 595         struct connman_device *device = connman_network_get_device(network);
 596         struct wifi_data *wifi;
 597         GSupplicantInterface *interface;
 598         GSupplicantSSID ssid;
 599
 600         DBG("network %p", network);
 601
 602         if (device == NULL)
 603                 return -ENODEV;
 604
 605         wifi = connman_device_get_data(device);
 606         if (wifi == NULL)
 607                 return -ENODEV;
 608
 609         interface = wifi->interface;
 610
 611         ssid_init(&ssid, network);
 612
 613         if (wifi->disconnecting == TRUE)
 614                 wifi->pending_network = connman_network_ref(network);
 615         else {
 616                 wifi->network = connman_network_ref(network);
 617
 618                 return g_supplicant_interface_connect(interface, &ssid,
 619                                                 connect_callback, NULL);
 620         }
 621
 622         return -EINPROGRESS;
 623 }
 624
 625 static void disconnect_callback(int result, GSupplicantInterface *interface,
 626                                                                 void *user_data)
 627 {
 628         struct wifi_data *wifi = user_data;
 629
 630         if (wifi->network != NULL) {
 631                 /*
 632                  * if result < 0 supplican return an error because
 633                  * the network is not current.
 634                  * we wont receive G_SUPPLICANT_STATE_DISCONNECTED since it
 635                  * failed, call connman_network_set_connected to report
 636                  * disconnect is completed.
 637                  */
 638                 if (result < 0)
 639                         connman_network_set_connected(wifi->network, FALSE);
 640
 641                 connman_network_unref(wifi->network);
 642         }
 643
 644         wifi->network = NULL;
 645
 646         wifi->disconnecting = FALSE;
 647
 648         if (wifi->pending_network != NULL) {
 649                 network_connect(wifi->pending_network);
 650                 connman_network_unref(wifi->pending_network);
 651                 wifi->pending_network = NULL;
 652         }
 653
 654 }
 655
 656 static int network_disconnect(struct connman_network *network)
 657 {
 658         struct connman_device *device = connman_network_get_device(network);
 659         struct wifi_data *wifi;
 660         int err;
 661
 662         DBG("network %p", network);
 663
 664         wifi = connman_device_get_data(device);
 665         if (wifi == NULL || wifi->interface == NULL)
 666                 return -ENODEV;
 667
 668         connman_network_set_associating(network, FALSE);
 669
 670         if (wifi->disconnecting == TRUE)
 671                 return -EALREADY;
 672
 673         wifi->disconnecting = TRUE;
 674
 675         err = g_supplicant_interface_disconnect(wifi->interface,
 676                                                 disconnect_callback, wifi);
 677         if (err < 0)
 678                 wifi->disconnecting = FALSE;
 679
 680         return err;
 681 }
 682
 683 static struct connman_network_driver network_driver = {
 684         .name           = "wifi",
 685         .type           = CONNMAN_NETWORK_TYPE_WIFI,
 686         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
 687         .probe          = network_probe,
 688         .remove         = network_remove,
 689         .connect        = network_connect,
 690         .disconnect     = network_disconnect,
 691 };
 692
 693 static int tech_probe(struct connman_technology *technology)
 694 {
 695         wifi_technology = technology;
 696
 697         return 0;
 698 }
 699
 700 static void tech_remove(struct connman_technology *technology)
 701 {
 702         wifi_technology = NULL;
 703 }
 704
 705 static void regdom_callback(void *user_data)
 706 {
 707         char *alpha2 = user_data;
 708
 709         DBG("");
 710
 711         if (wifi_technology == NULL)
 712                 return;
 713
 714         connman_technology_regdom_notify(wifi_technology, alpha2);
 715 }
 716
 717 static int tech_set_regdom(struct connman_technology *technology, const char *alpha2)
 718 {
 719         return g_supplicant_set_country(alpha2, regdom_callback, alpha2);
 720 }
 721
 722 static struct connman_technology_driver tech_driver = {
 723         .name           = "wifi",
 724         .type           = CONNMAN_SERVICE_TYPE_WIFI,
 725         .probe          = tech_probe,
 726         .remove         = tech_remove,
 727         .set_regdom     = tech_set_regdom,
 728 };
 729
 730 static int wifi_init(void)
 731 {
 732         int err;
 733
 734         err = connman_network_driver_register(&network_driver);
 735         if (err < 0)
 736                 return err;
 737
 738         err = g_supplicant_register(&callbacks);
 739         if (err < 0) {
 740                 connman_network_driver_unregister(&network_driver);
 741                 return err;
 742         }
 743
 744         err = connman_technology_driver_register(&tech_driver);
 745         if (err < 0) {
 746                 g_supplicant_unregister(&callbacks);
 747                 connman_network_driver_unregister(&network_driver);
 748                 return err;
 749         }
 750
 751         return 0;
 752 }
 753
 754 static void wifi_exit(void)
 755 {
 756         DBG();
 757
 758         connman_technology_driver_unregister(&tech_driver);
 759
 760         g_supplicant_unregister(&callbacks);
 761
 762         connman_network_driver_unregister(&network_driver);
 763 }
 764
 765 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 766                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)