workbench/network/WirelessManager/wpa_supplicant/dbus/dbus_old.c

   1 /*
   2  * WPA Supplicant / dbus-based control interface
   3  * Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #include <dbus/dbus.h>
  17
  18 #include "common.h"
  19 #include "eloop.h"
  20 #include "wps/wps.h"
  21 #include "../config.h"
  22 #include "../wpa_supplicant_i.h"
  23 #include "../bss.h"
  24 #include "dbus_old.h"
  25 #include "dbus_old_handlers.h"
  26 #include "dbus_common.h"
  27 #include "dbus_common_i.h"
  28
  29
  30 /**
  31  * wpas_dbus_decompose_object_path - Decompose an interface object path into parts
  32  * @path: The dbus object path
  33  * @network: (out) the configured network this object path refers to, if any
  34  * @bssid: (out) the scanned bssid this object path refers to, if any
  35  * Returns: The object path of the network interface this path refers to
  36  *
  37  * For a given object path, decomposes the object path into object id, network,
  38  * and BSSID parts, if those parts exist.
  39  */
  40 char * wpas_dbus_decompose_object_path(const char *path, char **network,
  41                                        char **bssid)
  42 {
  43         const unsigned int dev_path_prefix_len =
  44                 strlen(WPAS_DBUS_PATH_INTERFACES "/");
  45         char *obj_path_only;
  46         char *next_sep;
  47
  48         /* Be a bit paranoid about path */
  49         if (!path || strncmp(path, WPAS_DBUS_PATH_INTERFACES "/",
  50                              dev_path_prefix_len))
  51                 return NULL;
  52
  53         /* Ensure there's something at the end of the path */
  54         if ((path + dev_path_prefix_len)[0] == '\0')
  55                 return NULL;
  56
  57         obj_path_only = os_strdup(path);
  58         if (obj_path_only == NULL)
  59                 return NULL;
  60
  61         next_sep = strchr(obj_path_only + dev_path_prefix_len, '/');
  62         if (next_sep != NULL) {
  63                 const char *net_part = strstr(next_sep,
  64                                               WPAS_DBUS_NETWORKS_PART "/");
  65                 const char *bssid_part = strstr(next_sep,
  66                                                 WPAS_DBUS_BSSIDS_PART "/");
  67
  68                 if (network && net_part) {
  69                         /* Deal with a request for a configured network */
  70                         const char *net_name = net_part +
  71                                 strlen(WPAS_DBUS_NETWORKS_PART "/");
  72                         *network = NULL;
  73                         if (strlen(net_name))
  74                                 *network = os_strdup(net_name);
  75                 } else if (bssid && bssid_part) {
  76                         /* Deal with a request for a scanned BSSID */
  77                         const char *bssid_name = bssid_part +
  78                                 strlen(WPAS_DBUS_BSSIDS_PART "/");
  79                         if (strlen(bssid_name))
  80                                 *bssid = os_strdup(bssid_name);
  81                         else
  82                                 *bssid = NULL;
  83                 }
  84
  85                 /* Cut off interface object path before "/" */
  86                 *next_sep = '\0';
  87         }
  88
  89         return obj_path_only;
  90 }
  91
  92
  93 /**
  94  * wpas_dbus_new_invalid_iface_error - Return a new invalid interface error message
  95  * @message: Pointer to incoming dbus message this error refers to
  96  * Returns: A dbus error message
  97  *
  98  * Convenience function to create and return an invalid interface error
  99  */
 100 DBusMessage * wpas_dbus_new_invalid_iface_error(DBusMessage *message)
 101 {
 102         return dbus_message_new_error(message, WPAS_ERROR_INVALID_IFACE,
 103                                       "wpa_supplicant knows nothing about "
 104                                       "this interface.");
 105 }
 106
 107
 108 /**
 109  * wpas_dbus_new_invalid_network_error - Return a new invalid network error message
 110  * @message: Pointer to incoming dbus message this error refers to
 111  * Returns: a dbus error message
 112  *
 113  * Convenience function to create and return an invalid network error
 114  */
 115 DBusMessage * wpas_dbus_new_invalid_network_error(DBusMessage *message)
 116 {
 117         return dbus_message_new_error(message, WPAS_ERROR_INVALID_NETWORK,
 118                                       "The requested network does not exist.");
 119 }
 120
 121
 122 /**
 123  * wpas_dbus_new_invalid_bssid_error - Return a new invalid bssid error message
 124  * @message: Pointer to incoming dbus message this error refers to
 125  * Returns: a dbus error message
 126  *
 127  * Convenience function to create and return an invalid bssid error
 128  */
 129 static DBusMessage * wpas_dbus_new_invalid_bssid_error(DBusMessage *message)
 130 {
 131         return dbus_message_new_error(message, WPAS_ERROR_INVALID_BSSID,
 132                                       "The BSSID requested was invalid.");
 133 }
 134
 135
 136 /**
 137  * wpas_dispatch_network_method - dispatch messages for configured networks
 138  * @message: the incoming dbus message
 139  * @wpa_s: a network interface's data
 140  * @network_id: id of the configured network we're interested in
 141  * Returns: a reply dbus message, or a dbus error message
 142  *
 143  * This function dispatches all incoming dbus messages for configured networks.
 144  */
 145 static DBusMessage * wpas_dispatch_network_method(DBusMessage *message,
 146                                                   struct wpa_supplicant *wpa_s,
 147                                                   int network_id)
 148 {
 149         DBusMessage *reply = NULL;
 150         const char *method = dbus_message_get_member(message);
 151         struct wpa_ssid *ssid;
 152
 153         ssid = wpa_config_get_network(wpa_s->conf, network_id);
 154         if (ssid == NULL)
 155                 return wpas_dbus_new_invalid_network_error(message);
 156
 157         if (!strcmp(method, "set"))
 158                 reply = wpas_dbus_iface_set_network(message, wpa_s, ssid);
 159         else if (!strcmp(method, "enable"))
 160                 reply = wpas_dbus_iface_enable_network(message, wpa_s, ssid);
 161         else if (!strcmp(method, "disable"))
 162                 reply = wpas_dbus_iface_disable_network(message, wpa_s, ssid);
 163
 164         return reply;
 165 }
 166
 167
 168 /**
 169  * wpas_dispatch_bssid_method - dispatch messages for scanned networks
 170  * @message: the incoming dbus message
 171  * @wpa_s: a network interface's data
 172  * @bssid: bssid of the scanned network we're interested in
 173  * Returns: a reply dbus message, or a dbus error message
 174  *
 175  * This function dispatches all incoming dbus messages for scanned networks.
 176  */
 177 static DBusMessage * wpas_dispatch_bssid_method(DBusMessage *message,
 178                                                 struct wpa_supplicant *wpa_s,
 179                                                 const char *bssid_txt)
 180 {
 181         u8 bssid[ETH_ALEN];
 182         struct wpa_bss *bss;
 183
 184         if (hexstr2bin(bssid_txt, bssid, ETH_ALEN) < 0)
 185                 return wpas_dbus_new_invalid_bssid_error(message);
 186
 187         bss = wpa_bss_get_bssid(wpa_s, bssid);
 188         if (bss == NULL)
 189                 return wpas_dbus_new_invalid_bssid_error(message);
 190
 191         /* Dispatch the method call against the scanned bssid */
 192         if (os_strcmp(dbus_message_get_member(message), "properties") == 0)
 193                 return wpas_dbus_bssid_properties(message, wpa_s, bss);
 194
 195         return NULL;
 196 }
 197
 198
 199 /**
 200  * wpas_iface_message_handler - Dispatch messages for interfaces or networks
 201  * @connection: Connection to the system message bus
 202  * @message: An incoming dbus message
 203  * @user_data: A pointer to a dbus control interface data structure
 204  * Returns: Whether or not the message was handled
 205  *
 206  * This function dispatches all incoming dbus messages for network interfaces,
 207  * or objects owned by them, such as scanned BSSIDs and configured networks.
 208  */
 209 static DBusHandlerResult wpas_iface_message_handler(DBusConnection *connection,
 210                                                     DBusMessage *message,
 211                                                     void *user_data)
 212 {
 213         struct wpa_supplicant *wpa_s = user_data;
 214         const char *method = dbus_message_get_member(message);
 215         const char *path = dbus_message_get_path(message);
 216         const char *msg_interface = dbus_message_get_interface(message);
 217         char *iface_obj_path = NULL;
 218         char *network = NULL;
 219         char *bssid = NULL;
 220         DBusMessage *reply = NULL;
 221
 222         /* Caller must specify a message interface */
 223         if (!msg_interface)
 224                 goto out;
 225
 226         iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
 227                                                          &bssid);
 228         if (iface_obj_path == NULL) {
 229                 reply = wpas_dbus_new_invalid_iface_error(message);
 230                 goto out;
 231         }
 232
 233         /* Make sure the message's object path actually refers to the
 234          * wpa_supplicant structure it's supposed to (which is wpa_s)
 235          */
 236         if (wpa_supplicant_get_iface_by_dbus_path(wpa_s->global,
 237                                                   iface_obj_path) != wpa_s) {
 238                 reply = wpas_dbus_new_invalid_iface_error(message);
 239                 goto out;
 240         }
 241
 242         if (network && !strcmp(msg_interface, WPAS_DBUS_IFACE_NETWORK)) {
 243                 /* A method for one of this interface's configured networks */
 244                 int nid = strtoul(network, NULL, 10);
 245                 if (errno != EINVAL)
 246                         reply = wpas_dispatch_network_method(message, wpa_s,
 247                                                              nid);
 248                 else
 249                         reply = wpas_dbus_new_invalid_network_error(message);
 250         } else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) {
 251                 /* A method for one of this interface's scanned BSSIDs */
 252                 reply = wpas_dispatch_bssid_method(message, wpa_s, bssid);
 253         } else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) {
 254                 /* A method for an interface only. */
 255                 if (!strcmp(method, "scan"))
 256                         reply = wpas_dbus_iface_scan(message, wpa_s);
 257                 else if (!strcmp(method, "scanResults"))
 258                         reply = wpas_dbus_iface_scan_results(message, wpa_s);
 259                 else if (!strcmp(method, "addNetwork"))
 260                         reply = wpas_dbus_iface_add_network(message, wpa_s);
 261                 else if (!strcmp(method, "removeNetwork"))
 262                         reply = wpas_dbus_iface_remove_network(message, wpa_s);
 263                 else if (!strcmp(method, "selectNetwork"))
 264                         reply = wpas_dbus_iface_select_network(message, wpa_s);
 265                 else if (!strcmp(method, "capabilities"))
 266                         reply = wpas_dbus_iface_capabilities(message, wpa_s);
 267                 else if (!strcmp(method, "disconnect"))
 268                         reply = wpas_dbus_iface_disconnect(message, wpa_s);
 269                 else if (!strcmp(method, "setAPScan"))
 270                         reply = wpas_dbus_iface_set_ap_scan(message, wpa_s);
 271                 else if (!strcmp(method, "setSmartcardModules"))
 272                         reply = wpas_dbus_iface_set_smartcard_modules(message,
 273                                                                       wpa_s);
 274                 else if (!strcmp(method, "state"))
 275                         reply = wpas_dbus_iface_get_state(message, wpa_s);
 276                 else if (!strcmp(method, "scanning"))
 277                         reply = wpas_dbus_iface_get_scanning(message, wpa_s);
 278                 else if (!strcmp(method, "setBlobs"))
 279                         reply = wpas_dbus_iface_set_blobs(message, wpa_s);
 280                 else if (!strcmp(method, "removeBlobs"))
 281                         reply = wpas_dbus_iface_remove_blobs(message, wpa_s);
 282 #ifdef CONFIG_WPS
 283                 else if (!os_strcmp(method, "wpsPbc"))
 284                         reply = wpas_dbus_iface_wps_pbc(message, wpa_s);
 285                 else if (!os_strcmp(method, "wpsPin"))
 286                         reply = wpas_dbus_iface_wps_pin(message, wpa_s);
 287                 else if (!os_strcmp(method, "wpsReg"))
 288                         reply = wpas_dbus_iface_wps_reg(message, wpa_s);
 289 #endif /* CONFIG_WPS */
 290         }
 291
 292         /* If the message was handled, send back the reply */
 293         if (reply) {
 294                 if (!dbus_message_get_no_reply(message))
 295                         dbus_connection_send(connection, reply, NULL);
 296                 dbus_message_unref(reply);
 297         }
 298
 299 out:
 300         os_free(iface_obj_path);
 301         os_free(network);
 302         os_free(bssid);
 303         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 304                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 305 }
 306
 307
 308 /**
 309  * wpas_message_handler - dispatch incoming dbus messages
 310  * @connection: connection to the system message bus
 311  * @message: an incoming dbus message
 312  * @user_data: a pointer to a dbus control interface data structure
 313  * Returns: whether or not the message was handled
 314  *
 315  * This function dispatches all incoming dbus messages to the correct
 316  * handlers, depending on what the message's target object path is,
 317  * and what the method call is.
 318  */
 319 static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
 320         DBusMessage *message, void *user_data)
 321 {
 322         struct wpas_dbus_priv *ctrl_iface = user_data;
 323         const char *method;
 324         const char *path;
 325         const char *msg_interface;
 326         DBusMessage *reply = NULL;
 327
 328         method = dbus_message_get_member(message);
 329         path = dbus_message_get_path(message);
 330         msg_interface = dbus_message_get_interface(message);
 331         if (!method || !path || !ctrl_iface || !msg_interface)
 332                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 333
 334         /* Validate the method interface */
 335         if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
 336                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 337
 338         if (!strcmp(path, WPAS_DBUS_PATH)) {
 339                 /* dispatch methods against our global dbus interface here */
 340                 if (!strcmp(method, "addInterface")) {
 341                         reply = wpas_dbus_global_add_interface(
 342                                 message, ctrl_iface->global);
 343                 } else if (!strcmp(method, "removeInterface")) {
 344                         reply = wpas_dbus_global_remove_interface(
 345                                 message, ctrl_iface->global);
 346                 } else if (!strcmp(method, "getInterface")) {
 347                         reply = wpas_dbus_global_get_interface(
 348                                 message, ctrl_iface->global);
 349                 } else if (!strcmp(method, "setDebugParams")) {
 350                         reply = wpas_dbus_global_set_debugparams(
 351                                 message, ctrl_iface->global);
 352                 }
 353         }
 354
 355         /* If the message was handled, send back the reply */
 356         if (reply) {
 357                 if (!dbus_message_get_no_reply(message))
 358                         dbus_connection_send(connection, reply, NULL);
 359                 dbus_message_unref(reply);
 360         }
 361
 362         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 363                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 364 }
 365
 366
 367 /**
 368  * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
 369  * @wpa_s: %wpa_supplicant network interface data
 370  * Returns: 0 on success, -1 on failure
 371  *
 372  * Notify listeners that this interface has updated scan results.
 373  */
 374 void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
 375 {
 376         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 377         DBusMessage *_signal;
 378
 379         /* Do nothing if the control interface is not turned on */
 380         if (iface == NULL)
 381                 return;
 382
 383         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 384                                           WPAS_DBUS_IFACE_INTERFACE,
 385                                           "ScanResultsAvailable");
 386         if (_signal == NULL) {
 387                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 388                            "results signal");
 389                 return;
 390         }
 391         dbus_connection_send(iface->con, _signal, NULL);
 392         dbus_message_unref(_signal);
 393 }
 394
 395
 396 /**
 397  * wpa_supplicant_dbus_notify_state_change - Send a state change signal
 398  * @wpa_s: %wpa_supplicant network interface data
 399  * @new_state: new state wpa_supplicant is entering
 400  * @old_state: old state wpa_supplicant is leaving
 401  * Returns: 0 on success, -1 on failure
 402  *
 403  * Notify listeners that wpa_supplicant has changed state
 404  */
 405 void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
 406                                              enum wpa_states new_state,
 407                                              enum wpa_states old_state)
 408 {
 409         struct wpas_dbus_priv *iface;
 410         DBusMessage *_signal = NULL;
 411         const char *new_state_str, *old_state_str;
 412
 413         if (wpa_s->dbus_path == NULL)
 414                 return; /* Skip signal since D-Bus setup is not yet ready */
 415
 416         /* Do nothing if the control interface is not turned on */
 417         if (wpa_s->global == NULL)
 418                 return;
 419         iface = wpa_s->global->dbus;
 420         if (iface == NULL)
 421                 return;
 422
 423         /* Only send signal if state really changed */
 424         if (new_state == old_state)
 425                 return;
 426
 427         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 428                                           WPAS_DBUS_IFACE_INTERFACE,
 429                                           "StateChange");
 430         if (_signal == NULL) {
 431                 wpa_printf(MSG_ERROR,
 432                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 433                            "could not create dbus signal; likely out of "
 434                            "memory");
 435                 return;
 436         }
 437
 438         new_state_str = wpa_supplicant_state_txt(new_state);
 439         old_state_str = wpa_supplicant_state_txt(old_state);
 440         if (new_state_str == NULL || old_state_str == NULL) {
 441                 wpa_printf(MSG_ERROR,
 442                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 443                            "Could not convert state strings");
 444                 goto out;
 445         }
 446
 447         if (!dbus_message_append_args(_signal,
 448                                       DBUS_TYPE_STRING, &new_state_str,
 449                                       DBUS_TYPE_STRING, &old_state_str,
 450                                       DBUS_TYPE_INVALID)) {
 451                 wpa_printf(MSG_ERROR,
 452                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 453                            "Not enough memory to construct state change "
 454                            "signal");
 455                 goto out;
 456         }
 457
 458         dbus_connection_send(iface->con, _signal, NULL);
 459
 460 out:
 461         dbus_message_unref(_signal);
 462 }
 463
 464
 465 /**
 466  * wpa_supplicant_dbus_notify_scanning - send scanning status
 467  * @wpa_s: %wpa_supplicant network interface data
 468  * Returns: 0 on success, -1 on failure
 469  *
 470  * Notify listeners of interface scanning state changes
 471  */
 472 void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s)
 473 {
 474         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 475         DBusMessage *_signal;
 476         dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE;
 477
 478         /* Do nothing if the control interface is not turned on */
 479         if (iface == NULL)
 480                 return;
 481
 482         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 483                                           WPAS_DBUS_IFACE_INTERFACE,
 484                                           "Scanning");
 485         if (_signal == NULL) {
 486                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 487                            "results signal");
 488                 return;
 489         }
 490
 491         if (dbus_message_append_args(_signal,
 492                                      DBUS_TYPE_BOOLEAN, &scanning,
 493                                      DBUS_TYPE_INVALID)) {
 494                 dbus_connection_send(iface->con, _signal, NULL);
 495         } else {
 496                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to construct "
 497                            "signal");
 498         }
 499         dbus_message_unref(_signal);
 500 }
 501
 502
 503 #ifdef CONFIG_WPS
 504 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 505                                          const struct wps_credential *cred)
 506 {
 507         struct wpas_dbus_priv *iface;
 508         DBusMessage *_signal = NULL;
 509
 510         /* Do nothing if the control interface is not turned on */
 511         if (wpa_s->global == NULL)
 512                 return;
 513         iface = wpa_s->global->dbus;
 514         if (iface == NULL)
 515                 return;
 516
 517         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 518                                           WPAS_DBUS_IFACE_INTERFACE,
 519                                           "WpsCred");
 520         if (_signal == NULL) {
 521                 wpa_printf(MSG_ERROR,
 522                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 523                            "Could not create dbus signal; likely out of "
 524                            "memory");
 525                 return;
 526         }
 527
 528         if (!dbus_message_append_args(_signal,
 529                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 530                                       &cred->cred_attr, cred->cred_attr_len,
 531                                       DBUS_TYPE_INVALID)) {
 532                 wpa_printf(MSG_ERROR,
 533                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 534                            "Not enough memory to construct signal");
 535                 goto out;
 536         }
 537
 538         dbus_connection_send(iface->con, _signal, NULL);
 539
 540 out:
 541         dbus_message_unref(_signal);
 542 }
 543 #else /* CONFIG_WPS */
 544 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 545                                          const struct wps_credential *cred)
 546 {
 547 }
 548 #endif /* CONFIG_WPS */
 549
 550
 551 /**
 552  * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
 553  * @global: Pointer to global data from wpa_supplicant_init()
 554  * Returns: 0 on success, -1 on failure
 555  *
 556  * Initialize the dbus control interface and start receiving commands from
 557  * external programs over the bus.
 558  */
 559 int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface)
 560 {
 561         DBusError error;
 562         int ret = -1;
 563         DBusObjectPathVTable wpas_vtable = {
 564                 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
 565         };
 566
 567         /* Register the message handler for the global dbus interface */
 568         if (!dbus_connection_register_object_path(iface->con,
 569                                                   WPAS_DBUS_PATH, &wpas_vtable,
 570                                                   iface)) {
 571                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 572                            "handler");
 573                 return -1;
 574         }
 575
 576         /* Register our service with the message bus */
 577         dbus_error_init(&error);
 578         switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
 579                                       0, &error)) {
 580         case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
 581                 ret = 0;
 582                 break;
 583         case DBUS_REQUEST_NAME_REPLY_EXISTS:
 584         case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
 585         case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
 586                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 587                            "already registered");
 588                 break;
 589         default:
 590                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 591                            "%s %s", error.name, error.message);
 592                 break;
 593         }
 594         dbus_error_free(&error);
 595
 596         if (ret != 0)
 597                 return -1;
 598
 599         wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
 600                    "'.");
 601
 602         return 0;
 603 }
 604
 605
 606 /**
 607  * wpas_dbus_register_new_iface - Register a new interface with dbus
 608  * @wpa_s: %wpa_supplicant interface description structure to register
 609  * Returns: 0 on success, -1 on error
 610  *
 611  * Registers a new interface with dbus and assigns it a dbus object path.
 612  */
 613 int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
 614 {
 615         struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus;
 616         DBusConnection * con;
 617         u32 next;
 618         DBusObjectPathVTable vtable = {
 619                 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
 620         };
 621
 622         /* Do nothing if the control interface is not turned on */
 623         if (ctrl_iface == NULL)
 624                 return 0;
 625
 626         con = ctrl_iface->con;
 627         next = ctrl_iface->next_objid++;
 628
 629         /* Create and set the interface's object path */
 630         wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
 631         if (wpa_s->dbus_path == NULL)
 632                 return -1;
 633         os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX,
 634                     WPAS_DBUS_PATH_INTERFACES "/%u",
 635                     next);
 636
 637         /* Register the message handler for the interface functions */
 638         if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable,
 639                                                wpa_s)) {
 640                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 641                            "handler for interface %s", wpa_s->ifname);
 642                 return -1;
 643         }
 644
 645         return 0;
 646 }
 647
 648
 649 /**
 650  * wpas_dbus_unregister_iface - Unregister an interface from dbus
 651  * @wpa_s: wpa_supplicant interface structure
 652  * Returns: 0 on success, -1 on failure
 653  *
 654  * Unregisters the interface with dbus
 655  */
 656 int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
 657 {
 658         struct wpas_dbus_priv *ctrl_iface;
 659         DBusConnection *con;
 660
 661         /* Do nothing if the control interface is not turned on */
 662         if (wpa_s == NULL || wpa_s->global == NULL)
 663                 return 0;
 664         ctrl_iface = wpa_s->global->dbus;
 665         if (ctrl_iface == NULL)
 666                 return 0;
 667
 668         con = ctrl_iface->con;
 669         if (!dbus_connection_unregister_object_path(con, wpa_s->dbus_path))
 670                 return -1;
 671
 672         os_free(wpa_s->dbus_path);
 673         wpa_s->dbus_path = NULL;
 674
 675         return 0;
 676 }
 677
 678
 679 /**
 680  * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
 681  * @global: Pointer to global data from wpa_supplicant_init()
 682  * @path: Pointer to a dbus object path representing an interface
 683  * Returns: Pointer to the interface or %NULL if not found
 684  */
 685 struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
 686         struct wpa_global *global, const char *path)
 687 {
 688         struct wpa_supplicant *wpa_s;
 689
 690         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 691                 if (strcmp(wpa_s->dbus_path, path) == 0)
 692                         return wpa_s;
 693         }
 694         return NULL;
 695 }