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_supplicant_interface_set_data(wifi->interface, NULL);
 167
 168         g_free(wifi->identifier);
 169         g_free(wifi);
 170 }
 171
 172 static void interface_create_callback(int result,
 173                                         GSupplicantInterface *interface,
 174                                                         void *user_data)
 175 {
 176         struct wifi_data *wifi = user_data;
 177
 178         DBG("result %d ifname %s", result,
 179                                 g_supplicant_interface_get_ifname(interface));
 180
 181         if (result < 0)
 182                 return;
 183
 184         wifi->interface = interface;
 185         g_supplicant_interface_set_data(interface, wifi);
 186 }
 187
 188 static void interface_remove_callback(int result,
 189                                         GSupplicantInterface *interface,
 190                                                         void *user_data)
 191 {
 192         struct wifi_data *wifi = user_data;
 193
 194         DBG("result %d", result);
 195
 196         if (result < 0)
 197                 return;
 198
 199         wifi->interface = NULL;
 200 }
 201
 202
 203 static int wifi_enable(struct connman_device *device)
 204 {
 205         struct wifi_data *wifi = connman_device_get_data(device);
 206         const char *interface = connman_device_get_string(device, "Interface");
 207         const char *driver = connman_option_get_string("wifi");
 208
 209         DBG("device %p %p", device, wifi);
 210
 211         return g_supplicant_interface_create(interface, driver,
 212                                                 interface_create_callback,
 213                                                         wifi);
 214 }
 215
 216 static int wifi_disable(struct connman_device *device)
 217 {
 218         struct wifi_data *wifi = connman_device_get_data(device);
 219
 220         DBG("device %p", device);
 221
 222         wifi->connected = FALSE;
 223
 224         return g_supplicant_interface_remove(wifi->interface,
 225                                                 interface_remove_callback,
 226                                                         wifi);
 227 }
 228
 229 static void scan_callback(int result, GSupplicantInterface *interface,
 230                                                 void *user_data)
 231 {
 232         struct connman_device *device = user_data;
 233
 234         DBG("result %d", result);
 235
 236         connman_device_set_scanning(device, FALSE);
 237 }
 238
 239 static int wifi_scan(struct connman_device *device)
 240 {
 241         struct wifi_data *wifi = connman_device_get_data(device);
 242
 243         DBG("device %p %p", device, wifi->interface);
 244
 245         return g_supplicant_interface_scan(wifi->interface, scan_callback,
 246                                                                 device);
 247 }
 248
 249 static struct connman_device_driver wifi_ng_driver = {
 250         .name           = "wifi",
 251         .type           = CONNMAN_DEVICE_TYPE_WIFI,
 252         .priority       = CONNMAN_DEVICE_PRIORITY_LOW,
 253         .probe          = wifi_probe,
 254         .remove         = wifi_remove,
 255         .enable         = wifi_enable,
 256         .disable        = wifi_disable,
 257         .scan           = wifi_scan,
 258 };
 259
 260 static void system_ready(void)
 261 {
 262         DBG("");
 263
 264         if (connman_device_driver_register(&wifi_ng_driver) < 0)
 265                 connman_error("Failed to register WiFi driver");
 266 }
 267
 268 static void system_killed(void)
 269 {
 270         DBG("");
 271
 272         connman_device_driver_unregister(&wifi_ng_driver);
 273 }
 274
 275 static void interface_added(GSupplicantInterface *interface)
 276 {
 277         const char *ifname = g_supplicant_interface_get_ifname(interface);
 278         const char *driver = g_supplicant_interface_get_driver(interface);
 279         struct wifi_data *wifi;
 280
 281         wifi = g_supplicant_interface_get_data(interface);
 282
 283         DBG("ifname %s driver %s wifi %p", ifname, driver, wifi);
 284
 285         if (wifi == NULL || wifi->device == NULL) {
 286                 connman_error("Wrong wifi pointer");
 287                 return;
 288         }
 289
 290         connman_device_set_powered(wifi->device, TRUE);
 291         wifi_scan(wifi->device);
 292 }
 293
 294 static void interface_state(GSupplicantInterface *interface)
 295 {
 296         struct connman_network *network;
 297         struct connman_device *device;
 298         struct wifi_data *wifi;
 299         GSupplicantState state = g_supplicant_interface_get_state(interface);
 300         unsigned char bssid[ETH_ALEN];
 301         unsigned int bssid_len;
 302
 303         wifi = g_supplicant_interface_get_data(interface);
 304
 305         DBG("wifi %p interface state %d", wifi, state);
 306
 307         if (wifi == NULL)
 308                 return;
 309
 310         network = wifi->network;
 311         device = wifi->device;
 312
 313         if (device == NULL || network == NULL)
 314                 return;
 315
 316         switch (state) {
 317         case G_SUPPLICANT_STATE_SCANNING:
 318                 connman_device_set_scanning(device, TRUE);
 319                 break;
 320
 321         case G_SUPPLICANT_STATE_AUTHENTICATING:
 322         case G_SUPPLICANT_STATE_ASSOCIATING:
 323                 connman_network_set_associating(network, TRUE);
 324                 break;
 325
 326         case G_SUPPLICANT_STATE_COMPLETED:
 327                 /* reset scan trigger and schedule background scan */
 328                 connman_device_schedule_scan(device);
 329
 330                 if (get_bssid(device, bssid, &bssid_len) == 0)
 331                         connman_network_set_address(network,
 332                                                         bssid, bssid_len);
 333                 connman_network_set_connected(network, TRUE);
 334                 break;
 335
 336         case G_SUPPLICANT_STATE_DISCONNECTED:
 337                 connman_network_set_associating(network, FALSE);
 338                 connman_network_set_connected(network, FALSE);
 339                 break;
 340
 341         case G_SUPPLICANT_STATE_INACTIVE:
 342                 connman_network_set_associating(network, FALSE);
 343                 break;
 344
 345         case G_SUPPLICANT_STATE_UNKNOWN:
 346         case G_SUPPLICANT_STATE_ASSOCIATED:
 347         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
 348         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
 349                 break;
 350         }
 351
 352         DBG("DONE");
 353 }
 354
 355 static void interface_removed(GSupplicantInterface *interface)
 356 {
 357         const char *ifname = g_supplicant_interface_get_ifname(interface);
 358         struct wifi_data *wifi;
 359
 360         DBG("ifname %s", ifname);
 361
 362         wifi = g_supplicant_interface_get_data(interface);
 363
 364         if (wifi == NULL || wifi->device == NULL) {
 365                 connman_error("Wrong wifi pointer");
 366                 return;
 367         }
 368
 369         connman_device_set_powered(wifi->device, FALSE);
 370 }
 371
 372 static void scan_started(GSupplicantInterface *interface)
 373 {
 374         struct wifi_data *wifi;
 375
 376         DBG("");
 377
 378         wifi = g_supplicant_interface_get_data(interface);
 379
 380         if (wifi == NULL)
 381                 return;
 382
 383         if (wifi->device)
 384                 connman_device_set_scanning(wifi->device, TRUE);
 385 }
 386
 387 static void scan_finished(GSupplicantInterface *interface)
 388 {
 389         struct wifi_data *wifi;
 390
 391         DBG("");
 392
 393         wifi = g_supplicant_interface_get_data(interface);
 394
 395         if (wifi == NULL)
 396                 return;
 397 }
 398
 399 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
 400 {
 401         unsigned char strength;
 402
 403         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
 404         if (strength > 100)
 405                 strength = 100;
 406
 407         return strength;
 408 }
 409
 410 static void network_added(GSupplicantNetwork *supplicant_network)
 411 {
 412         struct connman_network *network;
 413         GSupplicantInterface *interface;
 414         struct wifi_data *wifi;
 415         const char *name, *identifier, *mode, *security, *group;
 416         const unsigned char *ssid;
 417         unsigned int ssid_len;
 418
 419         DBG("");
 420
 421         interface = g_supplicant_network_get_interface(supplicant_network);
 422         wifi = g_supplicant_interface_get_data(interface);
 423         name = g_supplicant_network_get_name(supplicant_network);
 424         identifier = g_supplicant_network_get_identifier(supplicant_network);
 425         mode = g_supplicant_network_get_mode(supplicant_network);
 426         security = g_supplicant_network_get_security(supplicant_network);
 427         group = g_supplicant_network_get_identifier(supplicant_network);
 428
 429         if (wifi == NULL)
 430                 return;
 431
 432         ssid = g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
 433
 434         network = connman_device_get_network(wifi->device, identifier);
 435
 436         if (network == NULL) {
 437                 network = connman_network_create(identifier,
 438                                                 CONNMAN_NETWORK_TYPE_WIFI);
 439                 if (network == NULL)
 440                         return;
 441
 442                 connman_network_set_index(network, wifi->index);
 443
 444                 if (connman_device_add_network(wifi->device, network) < 0) {
 445                         connman_network_unref(network);
 446                         return;
 447                 }
 448         }
 449
 450         if (name != NULL && name[0] != '\0')
 451                 connman_network_set_name(network, name);
 452
 453         connman_network_set_blob(network, "WiFi.SSID",
 454                                                 ssid, ssid_len);
 455         connman_network_set_string(network, "WiFi.Mode", mode);
 456         connman_network_set_string(network, "WiFi.Security", security);
 457         connman_network_set_strength(network,
 458                                 calculate_strength(supplicant_network));
 459
 460         connman_network_set_available(network, TRUE);
 461
 462         if (ssid != NULL)
 463                 connman_network_set_group(network, group);
 464 }
 465
 466 static void network_removed(GSupplicantNetwork *network)
 467 {
 468         const char *name = g_supplicant_network_get_name(network);
 469
 470         DBG("* name %s", name);
 471 }
 472
 473 static void debug(const char *str)
 474 {
 475         connman_debug("%s", str);
 476 }
 477
 478 static const GSupplicantCallbacks callbacks = {
 479         .system_ready           = system_ready,
 480         .system_killed          = system_killed,
 481         .interface_added        = interface_added,
 482         .interface_state        = interface_state,
 483         .interface_removed      = interface_removed,
 484         .scan_started           = scan_started,
 485         .scan_finished          = scan_finished,
 486         .network_added          = network_added,
 487         .network_removed        = network_removed,
 488         .debug                  = debug,
 489 };
 490
 491
 492 static int network_probe(struct connman_network *network)
 493 {
 494         DBG("network %p", network);
 495
 496         return 0;
 497 }
 498
 499 static void network_remove(struct connman_network *network)
 500 {
 501         DBG("network %p", network);
 502 }
 503
 504 static void connect_callback(int result, GSupplicantInterface *interface,
 505                                                         void *user_data)
 506 {
 507         connman_error("%s", __func__);
 508 }
 509
 510 static void disconnect_callback(int result, GSupplicantInterface *interface,
 511                                                         void *user_data)
 512 {
 513         struct wifi_data *wifi = user_data;
 514
 515         if (result < 0) {
 516                 connman_error("%s", __func__);
 517                 return;
 518         }
 519
 520         connman_network_unref(wifi->network);
 521
 522         wifi->network = NULL;
 523 }
 524
 525
 526 static GSupplicantSecurity network_security(const char *security)
 527 {
 528         if (g_str_equal(security, "none") == TRUE)
 529                 return G_SUPPLICANT_SECURITY_NONE;
 530         else if (g_str_equal(security, "wep") == TRUE)
 531                 return G_SUPPLICANT_SECURITY_WEP;
 532         else if (g_str_equal(security, "psk") == TRUE)
 533                 return G_SUPPLICANT_SECURITY_PSK;
 534         else if (g_str_equal(security, "wpa") == TRUE)
 535                 return G_SUPPLICANT_SECURITY_PSK;
 536         else if (g_str_equal(security, "rsn") == TRUE)
 537                 return G_SUPPLICANT_SECURITY_PSK;
 538         else if (g_str_equal(security, "ieee8021x") == TRUE)
 539                 return G_SUPPLICANT_SECURITY_IEEE8021X;
 540
 541         return G_SUPPLICANT_SECURITY_UNKNOWN;
 542 }
 543
 544 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
 545 {
 546         const char *security;
 547
 548         memset(ssid, 0, sizeof(*ssid));
 549         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
 550                                                 &ssid->ssid_len);
 551         security = connman_network_get_string(network, "WiFi.Security");
 552         ssid->security = network_security(security);
 553         ssid->passphrase = connman_network_get_string(network,
 554                                                         "WiFi.Passphrase");
 555         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
 556
 557         /*
 558          * If our private key password is unset,
 559          * we use the supplied passphrase. That is needed
 560          * for PEAP where 2 passphrases (identity and client
 561          * cert may have to be provided.
 562          */
 563         if (connman_network_get_string(network,
 564                                         "WiFi.PrivateKeyPassphrase") == NULL)
 565                 connman_network_set_string(network,
 566                                                 "WiFi.PrivateKeyPassphrase",
 567                                                 ssid->passphrase);
 568         /* We must have an identity for both PEAP and TLS */
 569         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
 570         ssid->ca_cert_path = connman_network_get_string(network,
 571                                                         "WiFi.CACertFile");
 572         ssid->client_cert_path = connman_network_get_string(network,
 573                                                         "WiFi.ClientCertFile");
 574         ssid->private_key_path = connman_network_get_string(network,
 575                                                         "WiFi.PrivateKeyFile");
 576         ssid->private_key_passphrase = connman_network_get_string(network,
 577                                                 "WiFi.PrivateKeyPassphrase");
 578         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
 579
 580 }
 581
 582 static int network_connect(struct connman_network *network)
 583 {
 584         struct connman_device *device = connman_network_get_device(network);
 585         struct wifi_data *wifi;
 586         GSupplicantInterface *interface;
 587         GSupplicantSSID ssid;
 588
 589         DBG("network %p", network);
 590
 591         if (device == NULL)
 592                 return -ENODEV;
 593
 594         wifi = connman_device_get_data(device);
 595         if (wifi == NULL)
 596                 return -ENODEV;
 597
 598         interface = wifi->interface;
 599
 600         ssid_init(&ssid, network);
 601
 602         wifi->network = connman_network_ref(network);
 603
 604         return g_supplicant_interface_connect(interface, &ssid,
 605                                                 connect_callback, NULL);
 606 }
 607
 608 static int network_disconnect(struct connman_network *network)
 609 {
 610         struct connman_device *device = connman_network_get_device(network);
 611         struct wifi_data *wifi;
 612
 613         DBG("network %p", network);
 614
 615         wifi = connman_device_get_data(device);
 616         if (wifi == NULL || wifi->interface == NULL)
 617                 return -ENODEV;
 618
 619         connman_network_set_associating(network, FALSE);
 620
 621         return g_supplicant_interface_disconnect(wifi->interface,
 622                                                 disconnect_callback, wifi);
 623 }
 624
 625 static struct connman_network_driver network_driver = {
 626         .name           = "wifi",
 627         .type           = CONNMAN_NETWORK_TYPE_WIFI,
 628         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
 629         .probe          = network_probe,
 630         .remove         = network_remove,
 631         .connect        = network_connect,
 632         .disconnect     = network_disconnect,
 633 };
 634
 635 static int wifi_init(void)
 636 {
 637         int err;
 638
 639         err = connman_network_driver_register(&network_driver);
 640         if (err < 0)
 641                 return err;
 642
 643         err = g_supplicant_register(&callbacks);
 644         if (err < 0) {
 645                 connman_network_driver_unregister(&network_driver);
 646                 return err;
 647         }
 648
 649         return 0;
 650 }
 651
 652 static void wifi_exit(void)
 653 {
 654         DBG();
 655
 656         g_supplicant_unregister(&callbacks);
 657
 658         connman_network_driver_unregister(&network_driver);
 659 }
 660
 661 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 662                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)