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/log.h>
  48 #include <connman/option.h>
  49
  50 #include <gsupplicant/gsupplicant.h>
  51
  52 #define CLEANUP_TIMEOUT   8     /* in seconds */
  53 #define INACTIVE_TIMEOUT  12    /* in seconds */
  54
  55 struct wifi_data {
  56         char *identifier;
  57         struct connman_device *device;
  58         struct connman_network *network;
  59         GSupplicantInterface *interface;
  60         connman_bool_t connected;
  61         int index;
  62         unsigned flags;
  63         unsigned int watch;
  64 };
  65
  66 static int get_bssid(struct connman_device *device,
  67                                 unsigned char *bssid, unsigned int *bssid_len)
  68 {
  69         struct iwreq wrq;
  70         char *ifname;
  71         int ifindex;
  72         int fd, err;
  73
  74         ifindex = connman_device_get_index(device);
  75         if (ifindex < 0)
  76                 return -EINVAL;
  77
  78         ifname = connman_inet_ifname(ifindex);
  79         if (ifname == NULL)
  80                 return -EINVAL;
  81
  82         fd = socket(PF_INET, SOCK_DGRAM, 0);
  83         if (fd < 0) {
  84                 g_free(ifname);
  85                 return -EINVAL;
  86         }
  87
  88         memset(&wrq, 0, sizeof(wrq));
  89         strncpy(wrq.ifr_name, ifname, IFNAMSIZ);
  90
  91         err = ioctl(fd, SIOCGIWAP, &wrq);
  92
  93         g_free(ifname);
  94         close(fd);
  95
  96         if (err < 0)
  97                 return -EIO;
  98
  99         memcpy(bssid, wrq.u.ap_addr.sa_data, ETH_ALEN);
 100         *bssid_len = ETH_ALEN;
 101
 102         return 0;
 103 }
 104
 105 static void wifi_newlink(unsigned flags, unsigned change, void *user_data)
 106 {
 107         struct connman_device *device = user_data;
 108         struct wifi_data *wifi = connman_device_get_data(device);
 109
 110         DBG("index %d flags %d change %d", wifi->index, flags, change);
 111
 112         if (!change)
 113                 return;
 114
 115         if ((wifi->flags & IFF_UP) != (flags & IFF_UP)) {
 116                 if (flags & IFF_UP)
 117                         DBG("interface up");
 118                 else
 119                         DBG("interface down");
 120         }
 121
 122         if ((wifi->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 123                 if (flags & IFF_LOWER_UP)
 124                         DBG("carrier on");
 125                 else
 126                         DBG("carrier off");
 127         }
 128
 129         wifi->flags = flags;
 130 }
 131
 132 static int wifi_probe(struct connman_device *device)
 133 {
 134         struct wifi_data *wifi;
 135
 136         DBG("device %p", device);
 137
 138         wifi = g_try_new0(struct wifi_data, 1);
 139         if (wifi == NULL)
 140                 return -ENOMEM;
 141
 142         wifi->connected = FALSE;
 143
 144         connman_device_set_data(device, wifi);
 145         wifi->device = connman_device_ref(device);
 146
 147         wifi->index = connman_device_get_index(device);
 148         wifi->flags = 0;
 149
 150         wifi->watch = connman_rtnl_add_newlink_watch(wifi->index,
 151                                                         wifi_newlink, device);
 152
 153         return 0;
 154 }
 155
 156 static void wifi_remove(struct connman_device *device)
 157 {
 158         struct wifi_data *wifi = connman_device_get_data(device);
 159
 160         DBG("device %p", device);
 161
 162         connman_device_set_data(device, NULL);
 163         connman_device_unref(wifi->device);
 164         connman_rtnl_remove_watch(wifi->watch);
 165
 166         g_free(wifi->identifier);
 167         g_free(wifi);
 168 }
 169
 170 static void interface_create_callback(int result,
 171                                         GSupplicantInterface *interface,
 172                                                         void *user_data)
 173 {
 174         struct wifi_data *wifi = user_data;
 175
 176         DBG("result %d ifname %s", result,
 177                                 g_supplicant_interface_get_ifname(interface));
 178
 179         if (result < 0)
 180                 return;
 181
 182         wifi->interface = interface;
 183         g_supplicant_interface_set_data(interface, wifi);
 184 }
 185
 186 static void interface_remove_callback(int result,
 187                                         GSupplicantInterface *interface,
 188                                                         void *user_data)
 189 {
 190         struct wifi_data *wifi = user_data;
 191
 192         DBG("result %d", result);
 193
 194         if (result < 0)
 195                 return;
 196
 197         wifi->interface = NULL;
 198 }
 199
 200
 201 static int wifi_enable(struct connman_device *device)
 202 {
 203         struct wifi_data *wifi = connman_device_get_data(device);
 204         const char *interface = connman_device_get_string(device, "Interface");
 205         const char *driver = connman_option_get_string("wifi");
 206
 207         DBG("device %p %p", device, wifi);
 208
 209         return g_supplicant_interface_create(interface, driver,
 210                                                 interface_create_callback,
 211                                                         wifi);
 212 }
 213
 214 static int wifi_disable(struct connman_device *device)
 215 {
 216         struct wifi_data *wifi = connman_device_get_data(device);
 217
 218         DBG("device %p", device);
 219
 220         wifi->connected = FALSE;
 221
 222         return g_supplicant_interface_remove(wifi->interface,
 223                                                 interface_remove_callback,
 224                                                         wifi);
 225 }
 226
 227 static void scan_callback(int result, GSupplicantInterface *interface,
 228                                                 void *user_data)
 229 {
 230         struct connman_device *device = user_data;
 231
 232         DBG("result %d", result);
 233
 234         if (result < 0) {
 235                 connman_device_set_scanning(device, FALSE);
 236                 return;
 237         }
 238
 239         connman_device_set_scanning(device, TRUE);
 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, *path, *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         path = g_supplicant_network_get_path(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, path);
 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                 connman_network_set_protocol(network,
 449                                                 CONNMAN_NETWORK_PROTOCOL_IP);
 450
 451                 if (connman_device_add_network(wifi->device, network) < 0) {
 452                         connman_network_unref(network);
 453                         return;
 454                 }
 455         }
 456
 457         if (name != NULL && name[0] != '\0')
 458                 connman_network_set_name(network, name);
 459
 460         connman_network_set_blob(network, "WiFi.SSID",
 461                                                 ssid, ssid_len);
 462         connman_network_set_string(network, "WiFi.Mode", mode);
 463         connman_network_set_string(network, "WiFi.Security", security);
 464         connman_network_set_strength(network,
 465                                 calculate_strength(supplicant_network));
 466
 467         connman_network_set_available(network, TRUE);
 468
 469         if (ssid != NULL)
 470                 connman_network_set_group(network, group);
 471 }
 472
 473 static void network_removed(GSupplicantNetwork *network)
 474 {
 475         const char *name = g_supplicant_network_get_name(network);
 476
 477         DBG("* name %s", name);
 478 }
 479
 480 static void debug(const char *str)
 481 {
 482         connman_debug("%s", str);
 483 }
 484
 485 static const GSupplicantCallbacks callbacks = {
 486         .system_ready           = system_ready,
 487         .system_killed          = system_killed,
 488         .interface_added        = interface_added,
 489         .interface_state        = interface_state,
 490         .interface_removed      = interface_removed,
 491         .scan_started           = scan_started,
 492         .scan_finished          = scan_finished,
 493         .network_added          = network_added,
 494         .network_removed        = network_removed,
 495         .debug                  = debug,
 496 };
 497
 498
 499 static int network_probe(struct connman_network *network)
 500 {
 501         DBG("network %p", network);
 502
 503         return 0;
 504 }
 505
 506 static void network_remove(struct connman_network *network)
 507 {
 508         DBG("network %p", network);
 509 }
 510
 511 static void connect_callback(int result, GSupplicantInterface *interface,
 512                                                         void *user_data)
 513 {
 514         connman_error("%s", __func__);
 515 }
 516
 517 static void disconnect_callback(int result, GSupplicantInterface *interface,
 518                                                         void *user_data)
 519 {
 520         struct wifi_data *wifi = user_data;
 521
 522         if (result < 0) {
 523                 connman_error("%s", __func__);
 524                 return;
 525         }
 526
 527         connman_network_unref(wifi->network);
 528
 529         wifi->network = NULL;
 530 }
 531
 532
 533 static GSupplicantSecurity network_security(const char *security)
 534 {
 535         if (g_str_equal(security, "none") == TRUE)
 536                 return G_SUPPLICANT_SECURITY_NONE;
 537         else if (g_str_equal(security, "wep") == TRUE)
 538                 return G_SUPPLICANT_SECURITY_WEP;
 539         else if (g_str_equal(security, "psk") == TRUE)
 540                 return G_SUPPLICANT_SECURITY_PSK;
 541         else if (g_str_equal(security, "wpa") == TRUE)
 542                 return G_SUPPLICANT_SECURITY_PSK;
 543         else if (g_str_equal(security, "rsn") == TRUE)
 544                 return G_SUPPLICANT_SECURITY_PSK;
 545         else if (g_str_equal(security, "ieee8021x") == TRUE)
 546                 return G_SUPPLICANT_SECURITY_IEEE8021X;
 547
 548         return G_SUPPLICANT_SECURITY_UNKNOWN;
 549 }
 550
 551 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
 552 {
 553         const char *security;
 554
 555         memset(ssid, 0, sizeof(*ssid));
 556         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
 557                                                 &ssid->ssid_len);
 558         security = connman_network_get_string(network, "WiFi.Security");
 559         ssid->security = network_security(security);
 560         ssid->passphrase = connman_network_get_string(network,
 561                                                         "WiFi.Passphrase");
 562         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
 563
 564         /*
 565          * If our private key password is unset,
 566          * we use the supplied passphrase. That is needed
 567          * for PEAP where 2 passphrases (identity and client
 568          * cert may have to be provided.
 569          */
 570         if (connman_network_get_string(network,
 571                                         "WiFi.PrivateKeyPassphrase") == NULL)
 572                 connman_network_set_string(network,
 573                                                 "WiFi.PrivateKeyPassphrase",
 574                                                 ssid->passphrase);
 575         /* We must have an identity for both PEAP and TLS */
 576         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
 577         ssid->ca_cert_path = connman_network_get_string(network,
 578                                                         "WiFi.CACertFile");
 579         ssid->client_cert_path = connman_network_get_string(network,
 580                                                         "WiFi.ClientCertFile");
 581         ssid->private_key_path = connman_network_get_string(network,
 582                                                         "WiFi.PrivateKeyFile");
 583         ssid->private_key_passphrase = connman_network_get_string(network,
 584                                                 "WiFi.PrivateKeyPassphrase");
 585         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
 586
 587 }
 588
 589 static int network_connect(struct connman_network *network)
 590 {
 591         struct connman_device *device = connman_network_get_device(network);
 592         struct wifi_data *wifi;
 593         GSupplicantInterface *interface;
 594         GSupplicantSSID ssid;
 595
 596         DBG("network %p", network);
 597
 598         if (device == NULL)
 599                 return -ENODEV;
 600
 601         wifi = connman_device_get_data(device);
 602         if (wifi == NULL)
 603                 return -ENODEV;
 604
 605         interface = wifi->interface;
 606
 607         ssid_init(&ssid, network);
 608
 609         wifi->network = connman_network_ref(network);
 610
 611         return g_supplicant_interface_connect(interface, &ssid,
 612                                                 connect_callback, NULL);
 613 }
 614
 615 static int network_disconnect(struct connman_network *network)
 616 {
 617         struct connman_device *device = connman_network_get_device(network);
 618         struct wifi_data *wifi;
 619
 620         DBG("network %p", network);
 621
 622         wifi = connman_device_get_data(device);
 623         if (wifi == NULL || wifi->interface == NULL)
 624                 return -ENODEV;
 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 wifi_init(void)
 641 {
 642         int err;
 643
 644         err = connman_network_driver_register(&network_driver);
 645         if (err < 0)
 646                 return err;
 647
 648         err = g_supplicant_register(&callbacks);
 649         if (err < 0) {
 650                 connman_network_driver_unregister(&network_driver);
 651                 return err;
 652         }
 653
 654         return 0;
 655 }
 656
 657 static void wifi_exit(void)
 658 {
 659         DBG();
 660
 661         g_supplicant_unregister(&callbacks);
 662
 663         connman_network_driver_unregister(&network_driver);
 664 }
 665
 666 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 667                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)