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         /*
 288          * We can get here with a NULL wifi pointer when
 289          * the interface added signal is sent before the
 290          * interface creation callback is called.
 291          */
 292         if (wifi == NULL)
 293                 return;
 294
 295         DBG("ifname %s driver %s wifi %p", ifname, driver, wifi);
 296
 297         if (wifi->device == NULL) {
 298                 connman_error("WiFi device not set");
 299                 return;
 300         }
 301
 302         connman_device_set_powered(wifi->device, TRUE);
 303         wifi_scan(wifi->device);
 304 }
 305
 306 static void interface_state(GSupplicantInterface *interface)
 307 {
 308         struct connman_network *network;
 309         struct connman_device *device;
 310         struct wifi_data *wifi;
 311         GSupplicantState state = g_supplicant_interface_get_state(interface);
 312         unsigned char bssid[ETH_ALEN];
 313         unsigned int bssid_len;
 314
 315         wifi = g_supplicant_interface_get_data(interface);
 316
 317         DBG("wifi %p interface state %d", wifi, state);
 318
 319         if (wifi == NULL)
 320                 return;
 321
 322         network = wifi->network;
 323         device = wifi->device;
 324
 325         if (device == NULL || network == NULL)
 326                 return;
 327
 328         switch (state) {
 329         case G_SUPPLICANT_STATE_SCANNING:
 330                 connman_device_set_scanning(device, TRUE);
 331                 break;
 332
 333         case G_SUPPLICANT_STATE_AUTHENTICATING:
 334         case G_SUPPLICANT_STATE_ASSOCIATING:
 335                 connman_network_set_associating(network, TRUE);
 336                 break;
 337
 338         case G_SUPPLICANT_STATE_COMPLETED:
 339                 /* reset scan trigger and schedule background scan */
 340                 connman_device_schedule_scan(device);
 341
 342                 if (get_bssid(device, bssid, &bssid_len) == 0)
 343                         connman_network_set_address(network,
 344                                                         bssid, bssid_len);
 345                 connman_network_set_connected(network, TRUE);
 346                 break;
 347
 348         case G_SUPPLICANT_STATE_DISCONNECTED:
 349                 connman_network_set_associating(network, FALSE);
 350                 connman_network_set_connected(network, FALSE);
 351                 break;
 352
 353         case G_SUPPLICANT_STATE_INACTIVE:
 354                 connman_network_set_associating(network, FALSE);
 355                 break;
 356
 357         case G_SUPPLICANT_STATE_UNKNOWN:
 358         case G_SUPPLICANT_STATE_ASSOCIATED:
 359         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
 360         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
 361                 break;
 362         }
 363
 364         DBG("DONE");
 365 }
 366
 367 static void interface_removed(GSupplicantInterface *interface)
 368 {
 369         const char *ifname = g_supplicant_interface_get_ifname(interface);
 370         struct wifi_data *wifi;
 371
 372         DBG("ifname %s", ifname);
 373
 374         wifi = g_supplicant_interface_get_data(interface);
 375
 376         if (wifi == NULL || wifi->device == NULL) {
 377                 connman_error("Wrong wifi pointer");
 378                 return;
 379         }
 380
 381         connman_device_set_powered(wifi->device, FALSE);
 382 }
 383
 384 static void scan_started(GSupplicantInterface *interface)
 385 {
 386         struct wifi_data *wifi;
 387
 388         DBG("");
 389
 390         wifi = g_supplicant_interface_get_data(interface);
 391
 392         if (wifi == NULL)
 393                 return;
 394
 395         if (wifi->device)
 396                 connman_device_set_scanning(wifi->device, TRUE);
 397 }
 398
 399 static void scan_finished(GSupplicantInterface *interface)
 400 {
 401         struct wifi_data *wifi;
 402
 403         DBG("");
 404
 405         wifi = g_supplicant_interface_get_data(interface);
 406
 407         if (wifi == NULL)
 408                 return;
 409 }
 410
 411 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
 412 {
 413         unsigned char strength;
 414
 415         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
 416         if (strength > 100)
 417                 strength = 100;
 418
 419         return strength;
 420 }
 421
 422 static void network_added(GSupplicantNetwork *supplicant_network)
 423 {
 424         struct connman_network *network;
 425         GSupplicantInterface *interface;
 426         struct wifi_data *wifi;
 427         const char *name, *identifier, *mode, *security, *group;
 428         const unsigned char *ssid;
 429         unsigned int ssid_len;
 430
 431         DBG("");
 432
 433         interface = g_supplicant_network_get_interface(supplicant_network);
 434         wifi = g_supplicant_interface_get_data(interface);
 435         name = g_supplicant_network_get_name(supplicant_network);
 436         identifier = g_supplicant_network_get_identifier(supplicant_network);
 437         mode = g_supplicant_network_get_mode(supplicant_network);
 438         security = g_supplicant_network_get_security(supplicant_network);
 439         group = g_supplicant_network_get_identifier(supplicant_network);
 440
 441         if (wifi == NULL)
 442                 return;
 443
 444         ssid = g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
 445
 446         network = connman_device_get_network(wifi->device, identifier);
 447
 448         if (network == NULL) {
 449                 network = connman_network_create(identifier,
 450                                                 CONNMAN_NETWORK_TYPE_WIFI);
 451                 if (network == NULL)
 452                         return;
 453
 454                 connman_network_set_index(network, wifi->index);
 455
 456                 if (connman_device_add_network(wifi->device, network) < 0) {
 457                         connman_network_unref(network);
 458                         return;
 459                 }
 460         }
 461
 462         if (name != NULL && name[0] != '\0')
 463                 connman_network_set_name(network, name);
 464
 465         connman_network_set_blob(network, "WiFi.SSID",
 466                                                 ssid, ssid_len);
 467         connman_network_set_string(network, "WiFi.Mode", mode);
 468         connman_network_set_string(network, "WiFi.Security", security);
 469         connman_network_set_strength(network,
 470                                 calculate_strength(supplicant_network));
 471
 472         connman_network_set_available(network, TRUE);
 473
 474         if (ssid != NULL)
 475                 connman_network_set_group(network, group);
 476 }
 477
 478 static void network_removed(GSupplicantNetwork *network)
 479 {
 480         const char *name = g_supplicant_network_get_name(network);
 481
 482         DBG("* name %s", name);
 483 }
 484
 485 static void debug(const char *str)
 486 {
 487         if (getenv("CONNMAN_SUPPLICANT_DEBUG"))
 488                 connman_debug("%s", str);
 489 }
 490
 491 static const GSupplicantCallbacks callbacks = {
 492         .system_ready           = system_ready,
 493         .system_killed          = system_killed,
 494         .interface_added        = interface_added,
 495         .interface_state        = interface_state,
 496         .interface_removed      = interface_removed,
 497         .scan_started           = scan_started,
 498         .scan_finished          = scan_finished,
 499         .network_added          = network_added,
 500         .network_removed        = network_removed,
 501         .debug                  = debug,
 502 };
 503
 504
 505 static int network_probe(struct connman_network *network)
 506 {
 507         DBG("network %p", network);
 508
 509         return 0;
 510 }
 511
 512 static void network_remove(struct connman_network *network)
 513 {
 514         DBG("network %p", network);
 515 }
 516
 517 static void connect_callback(int result, GSupplicantInterface *interface,
 518                                                         void *user_data)
 519 {
 520         connman_error("%s", __func__);
 521 }
 522
 523 static void disconnect_callback(int result, GSupplicantInterface *interface,
 524                                                         void *user_data)
 525 {
 526         struct wifi_data *wifi = user_data;
 527
 528         if (result < 0) {
 529                 connman_error("%s", __func__);
 530                 return;
 531         }
 532
 533         connman_network_unref(wifi->network);
 534
 535         wifi->network = NULL;
 536 }
 537
 538
 539 static GSupplicantSecurity network_security(const char *security)
 540 {
 541         if (g_str_equal(security, "none") == TRUE)
 542                 return G_SUPPLICANT_SECURITY_NONE;
 543         else if (g_str_equal(security, "wep") == TRUE)
 544                 return G_SUPPLICANT_SECURITY_WEP;
 545         else if (g_str_equal(security, "psk") == TRUE)
 546                 return G_SUPPLICANT_SECURITY_PSK;
 547         else if (g_str_equal(security, "wpa") == TRUE)
 548                 return G_SUPPLICANT_SECURITY_PSK;
 549         else if (g_str_equal(security, "rsn") == TRUE)
 550                 return G_SUPPLICANT_SECURITY_PSK;
 551         else if (g_str_equal(security, "ieee8021x") == TRUE)
 552                 return G_SUPPLICANT_SECURITY_IEEE8021X;
 553
 554         return G_SUPPLICANT_SECURITY_UNKNOWN;
 555 }
 556
 557 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
 558 {
 559         const char *security;
 560
 561         memset(ssid, 0, sizeof(*ssid));
 562         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
 563                                                 &ssid->ssid_len);
 564         security = connman_network_get_string(network, "WiFi.Security");
 565         ssid->security = network_security(security);
 566         ssid->passphrase = connman_network_get_string(network,
 567                                                         "WiFi.Passphrase");
 568         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
 569
 570         /*
 571          * If our private key password is unset,
 572          * we use the supplied passphrase. That is needed
 573          * for PEAP where 2 passphrases (identity and client
 574          * cert may have to be provided.
 575          */
 576         if (connman_network_get_string(network,
 577                                         "WiFi.PrivateKeyPassphrase") == NULL)
 578                 connman_network_set_string(network,
 579                                                 "WiFi.PrivateKeyPassphrase",
 580                                                 ssid->passphrase);
 581         /* We must have an identity for both PEAP and TLS */
 582         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
 583         ssid->ca_cert_path = connman_network_get_string(network,
 584                                                         "WiFi.CACertFile");
 585         ssid->client_cert_path = connman_network_get_string(network,
 586                                                         "WiFi.ClientCertFile");
 587         ssid->private_key_path = connman_network_get_string(network,
 588                                                         "WiFi.PrivateKeyFile");
 589         ssid->private_key_passphrase = connman_network_get_string(network,
 590                                                 "WiFi.PrivateKeyPassphrase");
 591         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
 592
 593 }
 594
 595 static int network_connect(struct connman_network *network)
 596 {
 597         struct connman_device *device = connman_network_get_device(network);
 598         struct wifi_data *wifi;
 599         GSupplicantInterface *interface;
 600         GSupplicantSSID ssid;
 601
 602         DBG("network %p", network);
 603
 604         if (device == NULL)
 605                 return -ENODEV;
 606
 607         wifi = connman_device_get_data(device);
 608         if (wifi == NULL)
 609                 return -ENODEV;
 610
 611         interface = wifi->interface;
 612
 613         ssid_init(&ssid, network);
 614
 615         wifi->network = connman_network_ref(network);
 616
 617         return g_supplicant_interface_connect(interface, &ssid,
 618                                                 connect_callback, NULL);
 619 }
 620
 621 static int network_disconnect(struct connman_network *network)
 622 {
 623         struct connman_device *device = connman_network_get_device(network);
 624         struct wifi_data *wifi;
 625
 626         DBG("network %p", network);
 627
 628         wifi = connman_device_get_data(device);
 629         if (wifi == NULL || wifi->interface == NULL)
 630                 return -ENODEV;
 631
 632         connman_network_set_associating(network, FALSE);
 633
 634         return g_supplicant_interface_disconnect(wifi->interface,
 635                                                 disconnect_callback, wifi);
 636 }
 637
 638 static struct connman_network_driver network_driver = {
 639         .name           = "wifi",
 640         .type           = CONNMAN_NETWORK_TYPE_WIFI,
 641         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
 642         .probe          = network_probe,
 643         .remove         = network_remove,
 644         .connect        = network_connect,
 645         .disconnect     = network_disconnect,
 646 };
 647
 648 static int tech_probe(struct connman_technology *technology)
 649 {
 650         wifi_technology = technology;
 651
 652         return 0;
 653 }
 654
 655 static void tech_remove(struct connman_technology *technology)
 656 {
 657         wifi_technology = NULL;
 658 }
 659
 660 static void regdom_callback(void *user_data)
 661 {
 662         char *alpha2 = user_data;
 663
 664         DBG("");
 665
 666         if (wifi_technology == NULL)
 667                 return;
 668
 669         connman_technology_regdom_notify(wifi_technology, alpha2);
 670 }
 671
 672 static int tech_set_regdom(struct connman_technology *technology, const char *alpha2)
 673 {
 674         return g_supplicant_set_country(alpha2, regdom_callback, alpha2);
 675 }
 676
 677 static struct connman_technology_driver tech_driver = {
 678         .name           = "wifi",
 679         .type           = CONNMAN_SERVICE_TYPE_WIFI,
 680         .probe          = tech_probe,
 681         .remove         = tech_remove,
 682         .set_regdom     = tech_set_regdom,
 683 };
 684
 685 static int wifi_init(void)
 686 {
 687         int err;
 688
 689         err = connman_network_driver_register(&network_driver);
 690         if (err < 0)
 691                 return err;
 692
 693         err = g_supplicant_register(&callbacks);
 694         if (err < 0) {
 695                 connman_network_driver_unregister(&network_driver);
 696                 return err;
 697         }
 698
 699         err = connman_technology_driver_register(&tech_driver);
 700         if (err < 0) {
 701                 g_supplicant_unregister(&callbacks);
 702                 connman_network_driver_unregister(&network_driver);
 703                 return err;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static void wifi_exit(void)
 710 {
 711         DBG();
 712
 713         connman_technology_driver_unregister(&tech_driver);
 714
 715         g_supplicant_unregister(&callbacks);
 716
 717         connman_network_driver_unregister(&network_driver);
 718 }
 719
 720 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 721                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)