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