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