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                 else if (!os_strcmp(method, "flush"))
 291                         reply = wpas_dbus_iface_flush(message, wpa_s);
 292         }
 293
 294         /* If the message was handled, send back the reply */
 295         if (reply) {
 296                 if (!dbus_message_get_no_reply(message))
 297                         dbus_connection_send(connection, reply, NULL);
 298                 dbus_message_unref(reply);
 299         }
 300
 301 out:
 302         os_free(iface_obj_path);
 303         os_free(network);
 304         os_free(bssid);
 305         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 306                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 307 }
 308
 309
 310 /**
 311  * wpas_message_handler - dispatch incoming dbus messages
 312  * @connection: connection to the system message bus
 313  * @message: an incoming dbus message
 314  * @user_data: a pointer to a dbus control interface data structure
 315  * Returns: whether or not the message was handled
 316  *
 317  * This function dispatches all incoming dbus messages to the correct
 318  * handlers, depending on what the message's target object path is,
 319  * and what the method call is.
 320  */
 321 static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
 322         DBusMessage *message, void *user_data)
 323 {
 324         struct wpas_dbus_priv *ctrl_iface = user_data;
 325         const char *method;
 326         const char *path;
 327         const char *msg_interface;
 328         DBusMessage *reply = NULL;
 329
 330         method = dbus_message_get_member(message);
 331         path = dbus_message_get_path(message);
 332         msg_interface = dbus_message_get_interface(message);
 333         if (!method || !path || !ctrl_iface || !msg_interface)
 334                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 335
 336         /* Validate the method interface */
 337         if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
 338                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 339
 340         if (!strcmp(path, WPAS_DBUS_PATH)) {
 341                 /* dispatch methods against our global dbus interface here */
 342                 if (!strcmp(method, "addInterface")) {
 343                         reply = wpas_dbus_global_add_interface(
 344                                 message, ctrl_iface->global);
 345                 } else if (!strcmp(method, "removeInterface")) {
 346                         reply = wpas_dbus_global_remove_interface(
 347                                 message, ctrl_iface->global);
 348                 } else if (!strcmp(method, "getInterface")) {
 349                         reply = wpas_dbus_global_get_interface(
 350                                 message, ctrl_iface->global);
 351                 } else if (!strcmp(method, "setDebugParams")) {
 352                         reply = wpas_dbus_global_set_debugparams(
 353                                 message, ctrl_iface->global);
 354                 }
 355         }
 356
 357         /* If the message was handled, send back the reply */
 358         if (reply) {
 359                 if (!dbus_message_get_no_reply(message))
 360                         dbus_connection_send(connection, reply, NULL);
 361                 dbus_message_unref(reply);
 362         }
 363
 364         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 365                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 366 }
 367
 368
 369 /**
 370  * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
 371  * @wpa_s: %wpa_supplicant network interface data
 372  * Returns: 0 on success, -1 on failure
 373  *
 374  * Notify listeners that this interface has updated scan results.
 375  */
 376 void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
 377 {
 378         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 379         DBusMessage *_signal;
 380
 381         /* Do nothing if the control interface is not turned on */
 382         if (iface == NULL)
 383                 return;
 384
 385         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 386                                           WPAS_DBUS_IFACE_INTERFACE,
 387                                           "ScanResultsAvailable");
 388         if (_signal == NULL) {
 389                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 390                            "results signal");
 391                 return;
 392         }
 393         dbus_connection_send(iface->con, _signal, NULL);
 394         dbus_message_unref(_signal);
 395 }
 396
 397
 398 /**
 399  * wpa_supplicant_dbus_notify_state_change - Send a state change signal
 400  * @wpa_s: %wpa_supplicant network interface data
 401  * @new_state: new state wpa_supplicant is entering
 402  * @old_state: old state wpa_supplicant is leaving
 403  * Returns: 0 on success, -1 on failure
 404  *
 405  * Notify listeners that wpa_supplicant has changed state
 406  */
 407 void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
 408                                              enum wpa_states new_state,
 409                                              enum wpa_states old_state)
 410 {
 411         struct wpas_dbus_priv *iface;
 412         DBusMessage *_signal = NULL;
 413         const char *new_state_str, *old_state_str;
 414
 415         if (wpa_s->dbus_path == NULL)
 416                 return; /* Skip signal since D-Bus setup is not yet ready */
 417
 418         /* Do nothing if the control interface is not turned on */
 419         if (wpa_s->global == NULL)
 420                 return;
 421         iface = wpa_s->global->dbus;
 422         if (iface == NULL)
 423                 return;
 424
 425         /* Only send signal if state really changed */
 426         if (new_state == old_state)
 427                 return;
 428
 429         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 430                                           WPAS_DBUS_IFACE_INTERFACE,
 431                                           "StateChange");
 432         if (_signal == NULL) {
 433                 wpa_printf(MSG_ERROR,
 434                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 435                            "could not create dbus signal; likely out of "
 436                            "memory");
 437                 return;
 438         }
 439
 440         new_state_str = wpa_supplicant_state_txt(new_state);
 441         old_state_str = wpa_supplicant_state_txt(old_state);
 442         if (new_state_str == NULL || old_state_str == NULL) {
 443                 wpa_printf(MSG_ERROR,
 444                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 445                            "Could not convert state strings");
 446                 goto out;
 447         }
 448
 449         if (!dbus_message_append_args(_signal,
 450                                       DBUS_TYPE_STRING, &new_state_str,
 451                                       DBUS_TYPE_STRING, &old_state_str,
 452                                       DBUS_TYPE_INVALID)) {
 453                 wpa_printf(MSG_ERROR,
 454                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 455                            "Not enough memory to construct state change "
 456                            "signal");
 457                 goto out;
 458         }
 459
 460         dbus_connection_send(iface->con, _signal, NULL);
 461
 462 out:
 463         dbus_message_unref(_signal);
 464 }
 465
 466
 467 /**
 468  * wpa_supplicant_dbus_notify_scanning - send scanning status
 469  * @wpa_s: %wpa_supplicant network interface data
 470  * Returns: 0 on success, -1 on failure
 471  *
 472  * Notify listeners of interface scanning state changes
 473  */
 474 void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s)
 475 {
 476         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 477         DBusMessage *_signal;
 478         dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE;
 479
 480         /* Do nothing if the control interface is not turned on */
 481         if (iface == NULL)
 482                 return;
 483
 484         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 485                                           WPAS_DBUS_IFACE_INTERFACE,
 486                                           "Scanning");
 487         if (_signal == NULL) {
 488                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 489                            "results signal");
 490                 return;
 491         }
 492
 493         if (dbus_message_append_args(_signal,
 494                                      DBUS_TYPE_BOOLEAN, &scanning,
 495                                      DBUS_TYPE_INVALID)) {
 496                 dbus_connection_send(iface->con, _signal, NULL);
 497         } else {
 498                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to construct "
 499                            "signal");
 500         }
 501         dbus_message_unref(_signal);
 502 }
 503
 504
 505 #ifdef CONFIG_WPS
 506 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 507                                          const struct wps_credential *cred)
 508 {
 509         struct wpas_dbus_priv *iface;
 510         DBusMessage *_signal = NULL;
 511
 512         /* Do nothing if the control interface is not turned on */
 513         if (wpa_s->global == NULL)
 514                 return;
 515         iface = wpa_s->global->dbus;
 516         if (iface == NULL)
 517                 return;
 518
 519         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 520                                           WPAS_DBUS_IFACE_INTERFACE,
 521                                           "WpsCred");
 522         if (_signal == NULL) {
 523                 wpa_printf(MSG_ERROR,
 524                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 525                            "Could not create dbus signal; likely out of "
 526                            "memory");
 527                 return;
 528         }
 529
 530         if (!dbus_message_append_args(_signal,
 531                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 532                                       &cred->cred_attr, cred->cred_attr_len,
 533                                       DBUS_TYPE_INVALID)) {
 534                 wpa_printf(MSG_ERROR,
 535                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 536                            "Not enough memory to construct signal");
 537                 goto out;
 538         }
 539
 540         dbus_connection_send(iface->con, _signal, NULL);
 541
 542 out:
 543         dbus_message_unref(_signal);
 544 }
 545 #else /* CONFIG_WPS */
 546 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 547                                          const struct wps_credential *cred)
 548 {
 549 }
 550 #endif /* CONFIG_WPS */
 551
 552
 553 /**
 554  * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
 555  * @global: Pointer to global data from wpa_supplicant_init()
 556  * Returns: 0 on success, -1 on failure
 557  *
 558  * Initialize the dbus control interface and start receiving commands from
 559  * external programs over the bus.
 560  */
 561 int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface)
 562 {
 563         DBusError error;
 564         int ret = -1;
 565         DBusObjectPathVTable wpas_vtable = {
 566                 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
 567         };
 568
 569         /* Register the message handler for the global dbus interface */
 570         if (!dbus_connection_register_object_path(iface->con,
 571                                                   WPAS_DBUS_PATH, &wpas_vtable,
 572                                                   iface)) {
 573                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 574                            "handler");
 575                 return -1;
 576         }
 577
 578         /* Register our service with the message bus */
 579         dbus_error_init(&error);
 580         switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
 581                                       0, &error)) {
 582         case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
 583                 ret = 0;
 584                 break;
 585         case DBUS_REQUEST_NAME_REPLY_EXISTS:
 586         case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
 587         case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
 588                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 589                            "already registered");
 590                 break;
 591         default:
 592                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 593                            "%s %s", error.name, error.message);
 594                 break;
 595         }
 596         dbus_error_free(&error);
 597
 598         if (ret != 0)
 599                 return -1;
 600
 601         wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
 602                    "'.");
 603
 604         return 0;
 605 }
 606
 607
 608 /**
 609  * wpas_dbus_register_new_iface - Register a new interface with dbus
 610  * @wpa_s: %wpa_supplicant interface description structure to register
 611  * Returns: 0 on success, -1 on error
 612  *
 613  * Registers a new interface with dbus and assigns it a dbus object path.
 614  */
 615 int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
 616 {
 617         struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus;
 618         DBusConnection * con;
 619         u32 next;
 620         DBusObjectPathVTable vtable = {
 621                 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
 622         };
 623
 624         /* Do nothing if the control interface is not turned on */
 625         if (ctrl_iface == NULL)
 626                 return 0;
 627
 628         con = ctrl_iface->con;
 629         next = ctrl_iface->next_objid++;
 630
 631         /* Create and set the interface's object path */
 632         wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
 633         if (wpa_s->dbus_path == NULL)
 634                 return -1;
 635         os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX,
 636                     WPAS_DBUS_PATH_INTERFACES "/%u",
 637                     next);
 638
 639         /* Register the message handler for the interface functions */
 640         if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable,
 641                                                wpa_s)) {
 642                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 643                            "handler for interface %s", wpa_s->ifname);
 644                 return -1;
 645         }
 646
 647         return 0;
 648 }
 649
 650
 651 /**
 652  * wpas_dbus_unregister_iface - Unregister an interface from dbus
 653  * @wpa_s: wpa_supplicant interface structure
 654  * Returns: 0 on success, -1 on failure
 655  *
 656  * Unregisters the interface with dbus
 657  */
 658 int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
 659 {
 660         struct wpas_dbus_priv *ctrl_iface;
 661         DBusConnection *con;
 662
 663         /* Do nothing if the control interface is not turned on */
 664         if (wpa_s == NULL || wpa_s->global == NULL)
 665                 return 0;
 666         ctrl_iface = wpa_s->global->dbus;
 667         if (ctrl_iface == NULL)
 668                 return 0;
 669
 670         con = ctrl_iface->con;
 671         if (!dbus_connection_unregister_object_path(con, wpa_s->dbus_path))
 672                 return -1;
 673
 674         os_free(wpa_s->dbus_path);
 675         wpa_s->dbus_path = NULL;
 676
 677         return 0;
 678 }
 679
 680
 681 /**
 682  * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
 683  * @global: Pointer to global data from wpa_supplicant_init()
 684  * @path: Pointer to a dbus object path representing an interface
 685  * Returns: Pointer to the interface or %NULL if not found
 686  */
 687 struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
 688         struct wpa_global *global, const char *path)
 689 {
 690         struct wpa_supplicant *wpa_s;
 691
 692         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 693                 if (strcmp(wpa_s->dbus_path, path) == 0)
 694                         return wpa_s;
 695         }
 696         return NULL;
 697 }