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