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