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 software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10 #include <dbus/dbus.h>
  11
  12 #include "common.h"
  13 #include "eloop.h"
  14 #include "wps/wps.h"
  15 #include "../config.h"
  16 #include "../wpa_supplicant_i.h"
  17 #include "../bss.h"
  18 #include "dbus_old.h"
  19 #include "dbus_old_handlers.h"
  20 #include "dbus_common_i.h"
  21
  22
  23 /**
  24  * wpas_dbus_decompose_object_path - Decompose an interface object path into parts
  25  * @path: The dbus object path
  26  * @network: (out) the configured network this object path refers to, if any
  27  * @bssid: (out) the scanned bssid this object path refers to, if any
  28  * Returns: The object path of the network interface this path refers to
  29  *
  30  * For a given object path, decomposes the object path into object id, network,
  31  * and BSSID parts, if those parts exist.
  32  */
  33 char * wpas_dbus_decompose_object_path(const char *path, char **network,
  34                                        char **bssid)
  35 {
  36         const unsigned int dev_path_prefix_len =
  37                 strlen(WPAS_DBUS_PATH_INTERFACES "/");
  38         char *obj_path_only;
  39         char *next_sep;
  40
  41         /* Be a bit paranoid about path */
  42         if (!path || strncmp(path, WPAS_DBUS_PATH_INTERFACES "/",
  43                              dev_path_prefix_len))
  44                 return NULL;
  45
  46         /* Ensure there's something at the end of the path */
  47         if ((path + dev_path_prefix_len)[0] == '\0')
  48                 return NULL;
  49
  50         obj_path_only = os_strdup(path);
  51         if (obj_path_only == NULL)
  52                 return NULL;
  53
  54         next_sep = strchr(obj_path_only + dev_path_prefix_len, '/');
  55         if (next_sep != NULL) {
  56                 const char *net_part = strstr(next_sep,
  57                                               WPAS_DBUS_NETWORKS_PART "/");
  58                 const char *bssid_part = strstr(next_sep,
  59                                                 WPAS_DBUS_BSSIDS_PART "/");
  60
  61                 if (network && net_part) {
  62                         /* Deal with a request for a configured network */
  63                         const char *net_name = net_part +
  64                                 strlen(WPAS_DBUS_NETWORKS_PART "/");
  65                         *network = NULL;
  66                         if (strlen(net_name))
  67                                 *network = os_strdup(net_name);
  68                 } else if (bssid && bssid_part) {
  69                         /* Deal with a request for a scanned BSSID */
  70                         const char *bssid_name = bssid_part +
  71                                 strlen(WPAS_DBUS_BSSIDS_PART "/");
  72                         if (strlen(bssid_name))
  73                                 *bssid = os_strdup(bssid_name);
  74                         else
  75                                 *bssid = NULL;
  76                 }
  77
  78                 /* Cut off interface object path before "/" */
  79                 *next_sep = '\0';
  80         }
  81
  82         return obj_path_only;
  83 }
  84
  85
  86 /**
  87  * wpas_dbus_new_invalid_iface_error - Return a new invalid interface error message
  88  * @message: Pointer to incoming dbus message this error refers to
  89  * Returns: A dbus error message
  90  *
  91  * Convenience function to create and return an invalid interface error
  92  */
  93 DBusMessage * wpas_dbus_new_invalid_iface_error(DBusMessage *message)
  94 {
  95         return dbus_message_new_error(message, WPAS_ERROR_INVALID_IFACE,
  96                                       "wpa_supplicant knows nothing about "
  97                                       "this interface.");
  98 }
  99
 100
 101 /**
 102  * wpas_dbus_new_invalid_network_error - Return a new invalid network error message
 103  * @message: Pointer to incoming dbus message this error refers to
 104  * Returns: a dbus error message
 105  *
 106  * Convenience function to create and return an invalid network error
 107  */
 108 DBusMessage * wpas_dbus_new_invalid_network_error(DBusMessage *message)
 109 {
 110         return dbus_message_new_error(message, WPAS_ERROR_INVALID_NETWORK,
 111                                       "The requested network does not exist.");
 112 }
 113
 114
 115 /**
 116  * wpas_dbus_new_invalid_bssid_error - Return a new invalid bssid error message
 117  * @message: Pointer to incoming dbus message this error refers to
 118  * Returns: a dbus error message
 119  *
 120  * Convenience function to create and return an invalid bssid error
 121  */
 122 static DBusMessage * wpas_dbus_new_invalid_bssid_error(DBusMessage *message)
 123 {
 124         return dbus_message_new_error(message, WPAS_ERROR_INVALID_BSSID,
 125                                       "The BSSID requested was invalid.");
 126 }
 127
 128
 129 /**
 130  * wpas_dispatch_network_method - dispatch messages for configured networks
 131  * @message: the incoming dbus message
 132  * @wpa_s: a network interface's data
 133  * @network_id: id of the configured network we're interested in
 134  * Returns: a reply dbus message, or a dbus error message
 135  *
 136  * This function dispatches all incoming dbus messages for configured networks.
 137  */
 138 static DBusMessage * wpas_dispatch_network_method(DBusMessage *message,
 139                                                   struct wpa_supplicant *wpa_s,
 140                                                   int network_id)
 141 {
 142         DBusMessage *reply = NULL;
 143         const char *method = dbus_message_get_member(message);
 144         struct wpa_ssid *ssid;
 145
 146         ssid = wpa_config_get_network(wpa_s->conf, network_id);
 147         if (ssid == NULL)
 148                 return wpas_dbus_new_invalid_network_error(message);
 149
 150         if (!strcmp(method, "set"))
 151                 reply = wpas_dbus_iface_set_network(message, wpa_s, ssid);
 152         else if (!strcmp(method, "enable"))
 153                 reply = wpas_dbus_iface_enable_network(message, wpa_s, ssid);
 154         else if (!strcmp(method, "disable"))
 155                 reply = wpas_dbus_iface_disable_network(message, wpa_s, ssid);
 156
 157         return reply;
 158 }
 159
 160
 161 /**
 162  * wpas_dispatch_bssid_method - dispatch messages for scanned networks
 163  * @message: the incoming dbus message
 164  * @wpa_s: a network interface's data
 165  * @bssid: bssid of the scanned network we're interested in
 166  * Returns: a reply dbus message, or a dbus error message
 167  *
 168  * This function dispatches all incoming dbus messages for scanned networks.
 169  */
 170 static DBusMessage * wpas_dispatch_bssid_method(DBusMessage *message,
 171                                                 struct wpa_supplicant *wpa_s,
 172                                                 const char *bssid_txt)
 173 {
 174         u8 bssid[ETH_ALEN];
 175         struct wpa_bss *bss;
 176
 177         if (hexstr2bin(bssid_txt, bssid, ETH_ALEN) < 0)
 178                 return wpas_dbus_new_invalid_bssid_error(message);
 179
 180         bss = wpa_bss_get_bssid(wpa_s, bssid);
 181         if (bss == NULL)
 182                 return wpas_dbus_new_invalid_bssid_error(message);
 183
 184         /* Dispatch the method call against the scanned bssid */
 185         if (os_strcmp(dbus_message_get_member(message), "properties") == 0)
 186                 return wpas_dbus_bssid_properties(message, wpa_s, bss);
 187
 188         return NULL;
 189 }
 190
 191
 192 /**
 193  * wpas_iface_message_handler - Dispatch messages for interfaces or networks
 194  * @connection: Connection to the system message bus
 195  * @message: An incoming dbus message
 196  * @user_data: A pointer to a dbus control interface data structure
 197  * Returns: Whether or not the message was handled
 198  *
 199  * This function dispatches all incoming dbus messages for network interfaces,
 200  * or objects owned by them, such as scanned BSSIDs and configured networks.
 201  */
 202 static DBusHandlerResult wpas_iface_message_handler(DBusConnection *connection,
 203                                                     DBusMessage *message,
 204                                                     void *user_data)
 205 {
 206         struct wpa_supplicant *wpa_s = user_data;
 207         const char *method = dbus_message_get_member(message);
 208         const char *path = dbus_message_get_path(message);
 209         const char *msg_interface = dbus_message_get_interface(message);
 210         char *iface_obj_path = NULL;
 211         char *network = NULL;
 212         char *bssid = NULL;
 213         DBusMessage *reply = NULL;
 214
 215         /* Caller must specify a message interface */
 216         if (!msg_interface)
 217                 goto out;
 218
 219         wpa_printf(MSG_MSGDUMP, "dbus[old/iface]: %s.%s (%s) [%s]",
 220                    msg_interface, method, path,
 221                    dbus_message_get_signature(message));
 222
 223         iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
 224                                                          &bssid);
 225         if (iface_obj_path == NULL) {
 226                 reply = wpas_dbus_new_invalid_iface_error(message);
 227                 goto out;
 228         }
 229
 230         /* Make sure the message's object path actually refers to the
 231          * wpa_supplicant structure it's supposed to (which is wpa_s)
 232          */
 233         if (wpa_supplicant_get_iface_by_dbus_path(wpa_s->global,
 234                                                   iface_obj_path) != wpa_s) {
 235                 reply = wpas_dbus_new_invalid_iface_error(message);
 236                 goto out;
 237         }
 238
 239         if (network && !strcmp(msg_interface, WPAS_DBUS_IFACE_NETWORK)) {
 240                 /* A method for one of this interface's configured networks */
 241                 int nid = strtoul(network, NULL, 10);
 242                 if (errno != EINVAL)
 243                         reply = wpas_dispatch_network_method(message, wpa_s,
 244                                                              nid);
 245                 else
 246                         reply = wpas_dbus_new_invalid_network_error(message);
 247         } else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) {
 248                 /* A method for one of this interface's scanned BSSIDs */
 249                 reply = wpas_dispatch_bssid_method(message, wpa_s, bssid);
 250         } else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) {
 251                 /* A method for an interface only. */
 252                 if (!strcmp(method, "scan"))
 253                         reply = wpas_dbus_iface_scan(message, wpa_s);
 254                 else if (!strcmp(method, "scanResults"))
 255                         reply = wpas_dbus_iface_scan_results(message, wpa_s);
 256                 else if (!strcmp(method, "addNetwork"))
 257                         reply = wpas_dbus_iface_add_network(message, wpa_s);
 258                 else if (!strcmp(method, "removeNetwork"))
 259                         reply = wpas_dbus_iface_remove_network(message, wpa_s);
 260                 else if (!strcmp(method, "selectNetwork"))
 261                         reply = wpas_dbus_iface_select_network(message, wpa_s);
 262                 else if (!strcmp(method, "capabilities"))
 263                         reply = wpas_dbus_iface_capabilities(message, wpa_s);
 264                 else if (!strcmp(method, "disconnect"))
 265                         reply = wpas_dbus_iface_disconnect(message, wpa_s);
 266                 else if (!strcmp(method, "setAPScan"))
 267                         reply = wpas_dbus_iface_set_ap_scan(message, wpa_s);
 268                 else if (!strcmp(method, "setSmartcardModules"))
 269                         reply = wpas_dbus_iface_set_smartcard_modules(message,
 270                                                                       wpa_s);
 271                 else if (!strcmp(method, "state"))
 272                         reply = wpas_dbus_iface_get_state(message, wpa_s);
 273                 else if (!strcmp(method, "scanning"))
 274                         reply = wpas_dbus_iface_get_scanning(message, wpa_s);
 275 #ifndef CONFIG_NO_CONFIG_BLOBS
 276                 else if (!strcmp(method, "setBlobs"))
 277                         reply = wpas_dbus_iface_set_blobs(message, wpa_s);
 278                 else if (!strcmp(method, "removeBlobs"))
 279                         reply = wpas_dbus_iface_remove_blobs(message, wpa_s);
 280 #endif /* CONFIG_NO_CONFIG_BLOBS */
 281 #ifdef CONFIG_WPS
 282                 else if (!os_strcmp(method, "wpsPbc"))
 283                         reply = wpas_dbus_iface_wps_pbc(message, wpa_s);
 284                 else if (!os_strcmp(method, "wpsPin"))
 285                         reply = wpas_dbus_iface_wps_pin(message, wpa_s);
 286                 else if (!os_strcmp(method, "wpsReg"))
 287                         reply = wpas_dbus_iface_wps_reg(message, wpa_s);
 288 #endif /* CONFIG_WPS */
 289                 else if (!os_strcmp(method, "flush"))
 290                         reply = wpas_dbus_iface_flush(message, wpa_s);
 291         }
 292
 293         /* If the message was handled, send back the reply */
 294         if (reply) {
 295                 if (!dbus_message_get_no_reply(message))
 296                         dbus_connection_send(connection, reply, NULL);
 297                 dbus_message_unref(reply);
 298         }
 299
 300 out:
 301         os_free(iface_obj_path);
 302         os_free(network);
 303         os_free(bssid);
 304         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 305                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 306 }
 307
 308
 309 /**
 310  * wpas_message_handler - dispatch incoming dbus messages
 311  * @connection: connection to the system message bus
 312  * @message: an incoming dbus message
 313  * @user_data: a pointer to a dbus control interface data structure
 314  * Returns: whether or not the message was handled
 315  *
 316  * This function dispatches all incoming dbus messages to the correct
 317  * handlers, depending on what the message's target object path is,
 318  * and what the method call is.
 319  */
 320 static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
 321         DBusMessage *message, void *user_data)
 322 {
 323         struct wpas_dbus_priv *ctrl_iface = user_data;
 324         const char *method;
 325         const char *path;
 326         const char *msg_interface;
 327         DBusMessage *reply = NULL;
 328
 329         method = dbus_message_get_member(message);
 330         path = dbus_message_get_path(message);
 331         msg_interface = dbus_message_get_interface(message);
 332         if (!method || !path || !ctrl_iface || !msg_interface)
 333                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 334
 335         wpa_printf(MSG_MSGDUMP, "dbus[old]: %s.%s (%s) [%s]",
 336                    msg_interface, method, path,
 337                    dbus_message_get_signature(message));
 338
 339         /* Validate the method interface */
 340         if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
 341                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 342
 343         if (!strcmp(path, WPAS_DBUS_PATH)) {
 344                 /* dispatch methods against our global dbus interface here */
 345                 if (!strcmp(method, "addInterface")) {
 346                         reply = wpas_dbus_global_add_interface(
 347                                 message, ctrl_iface->global);
 348                 } else if (!strcmp(method, "removeInterface")) {
 349                         reply = wpas_dbus_global_remove_interface(
 350                                 message, ctrl_iface->global);
 351                 } else if (!strcmp(method, "getInterface")) {
 352                         reply = wpas_dbus_global_get_interface(
 353                                 message, ctrl_iface->global);
 354                 } else if (!strcmp(method, "setDebugParams")) {
 355                         reply = wpas_dbus_global_set_debugparams(
 356                                 message, ctrl_iface->global);
 357                 }
 358         }
 359
 360         /* If the message was handled, send back the reply */
 361         if (reply) {
 362                 if (!dbus_message_get_no_reply(message))
 363                         dbus_connection_send(connection, reply, NULL);
 364                 dbus_message_unref(reply);
 365         }
 366
 367         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 368                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 369 }
 370
 371
 372 /**
 373  * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
 374  * @wpa_s: %wpa_supplicant network interface data
 375  * Returns: 0 on success, -1 on failure
 376  *
 377  * Notify listeners that this interface has updated scan results.
 378  */
 379 void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
 380 {
 381         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 382         DBusMessage *_signal;
 383
 384         /* Do nothing if the control interface is not turned on */
 385         if (iface == NULL)
 386                 return;
 387
 388         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 389                                           WPAS_DBUS_IFACE_INTERFACE,
 390                                           "ScanResultsAvailable");
 391         if (_signal == NULL) {
 392                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 393                            "results signal");
 394                 return;
 395         }
 396         dbus_connection_send(iface->con, _signal, NULL);
 397         dbus_message_unref(_signal);
 398 }
 399
 400
 401 /**
 402  * wpa_supplicant_dbus_notify_state_change - Send a state change signal
 403  * @wpa_s: %wpa_supplicant network interface data
 404  * @new_state: new state wpa_supplicant is entering
 405  * @old_state: old state wpa_supplicant is leaving
 406  * Returns: 0 on success, -1 on failure
 407  *
 408  * Notify listeners that wpa_supplicant has changed state
 409  */
 410 void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
 411                                              enum wpa_states new_state,
 412                                              enum wpa_states old_state)
 413 {
 414         struct wpas_dbus_priv *iface;
 415         DBusMessage *_signal = NULL;
 416         const char *new_state_str, *old_state_str;
 417
 418         if (wpa_s->dbus_path == NULL)
 419                 return; /* Skip signal since D-Bus setup is not yet ready */
 420
 421         /* Do nothing if the control interface is not turned on */
 422         if (wpa_s->global == NULL)
 423                 return;
 424         iface = wpa_s->global->dbus;
 425         if (iface == NULL)
 426                 return;
 427
 428         /* Only send signal if state really changed */
 429         if (new_state == old_state)
 430                 return;
 431
 432         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 433                                           WPAS_DBUS_IFACE_INTERFACE,
 434                                           "StateChange");
 435         if (_signal == NULL) {
 436                 wpa_printf(MSG_ERROR,
 437                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 438                            "could not create dbus signal; likely out of "
 439                            "memory");
 440                 return;
 441         }
 442
 443         new_state_str = wpa_supplicant_state_txt(new_state);
 444         old_state_str = wpa_supplicant_state_txt(old_state);
 445
 446         if (!dbus_message_append_args(_signal,
 447                                       DBUS_TYPE_STRING, &new_state_str,
 448                                       DBUS_TYPE_STRING, &old_state_str,
 449                                       DBUS_TYPE_INVALID)) {
 450                 wpa_printf(MSG_ERROR,
 451                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 452                            "Not enough memory to construct state change "
 453                            "signal");
 454                 goto out;
 455         }
 456
 457         dbus_connection_send(iface->con, _signal, NULL);
 458
 459 out:
 460         dbus_message_unref(_signal);
 461 }
 462
 463
 464 /**
 465  * wpa_supplicant_dbus_notify_scanning - send scanning status
 466  * @wpa_s: %wpa_supplicant network interface data
 467  * Returns: 0 on success, -1 on failure
 468  *
 469  * Notify listeners of interface scanning state changes
 470  */
 471 void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s)
 472 {
 473         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 474         DBusMessage *_signal;
 475         dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE;
 476
 477         /* Do nothing if the control interface is not turned on */
 478         if (iface == NULL)
 479                 return;
 480
 481         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 482                                           WPAS_DBUS_IFACE_INTERFACE,
 483                                           "Scanning");
 484         if (_signal == NULL) {
 485                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 486                            "results signal");
 487                 return;
 488         }
 489
 490         if (dbus_message_append_args(_signal,
 491                                      DBUS_TYPE_BOOLEAN, &scanning,
 492                                      DBUS_TYPE_INVALID)) {
 493                 dbus_connection_send(iface->con, _signal, NULL);
 494         } else {
 495                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to construct "
 496                            "signal");
 497         }
 498         dbus_message_unref(_signal);
 499 }
 500
 501
 502 #ifdef CONFIG_WPS
 503 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 504                                          const struct wps_credential *cred)
 505 {
 506         struct wpas_dbus_priv *iface;
 507         DBusMessage *_signal = NULL;
 508
 509         /* Do nothing if the control interface is not turned on */
 510         if (wpa_s->global == NULL)
 511                 return;
 512         iface = wpa_s->global->dbus;
 513         if (iface == NULL)
 514                 return;
 515
 516         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 517                                           WPAS_DBUS_IFACE_INTERFACE,
 518                                           "WpsCred");
 519         if (_signal == NULL) {
 520                 wpa_printf(MSG_ERROR,
 521                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 522                            "Could not create dbus signal; likely out of "
 523                            "memory");
 524                 return;
 525         }
 526
 527         if (!dbus_message_append_args(_signal,
 528                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 529                                       &cred->cred_attr, cred->cred_attr_len,
 530                                       DBUS_TYPE_INVALID)) {
 531                 wpa_printf(MSG_ERROR,
 532                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 533                            "Not enough memory to construct signal");
 534                 goto out;
 535         }
 536
 537         dbus_connection_send(iface->con, _signal, NULL);
 538
 539 out:
 540         dbus_message_unref(_signal);
 541 }
 542 #else /* CONFIG_WPS */
 543 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 544                                          const struct wps_credential *cred)
 545 {
 546 }
 547 #endif /* CONFIG_WPS */
 548
 549 void wpa_supplicant_dbus_notify_certification(struct wpa_supplicant *wpa_s,
 550                                               int depth, const char *subject,
 551                                               const char *cert_hash,
 552                                               const struct wpabuf *cert)
 553 {
 554         struct wpas_dbus_priv *iface;
 555         DBusMessage *_signal = NULL;
 556         const char *hash;
 557         const char *cert_hex;
 558         int cert_hex_len;
 559
 560         /* Do nothing if the control interface is not turned on */
 561         if (wpa_s->global == NULL)
 562                 return;
 563         iface = wpa_s->global->dbus;
 564         if (iface == NULL)
 565                 return;
 566
 567         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 568                                           WPAS_DBUS_IFACE_INTERFACE,
 569                                           "Certification");
 570         if (_signal == NULL) {
 571                 wpa_printf(MSG_ERROR,
 572                            "dbus: wpa_supplicant_dbus_notify_certification: "
 573                            "Could not create dbus signal; likely out of "
 574                            "memory");
 575                 return;
 576         }
 577
 578         hash = cert_hash ? cert_hash : "";
 579         cert_hex = cert ? wpabuf_head(cert) : "";
 580         cert_hex_len = cert ? wpabuf_len(cert) : 0;
 581
 582         if (!dbus_message_append_args(_signal,
 583                                       DBUS_TYPE_INT32,&depth,
 584                                       DBUS_TYPE_STRING, &subject,
 585                                       DBUS_TYPE_STRING, &hash,
 586                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 587                                       &cert_hex, cert_hex_len,
 588                                       DBUS_TYPE_INVALID)) {
 589                 wpa_printf(MSG_ERROR,
 590                            "dbus: wpa_supplicant_dbus_notify_certification: "
 591                            "Not enough memory to construct signal");
 592                 goto out;
 593         }
 594
 595         dbus_connection_send(iface->con, _signal, NULL);
 596
 597 out:
 598         dbus_message_unref(_signal);
 599
 600 }
 601
 602
 603 /**
 604  * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
 605  * @global: Pointer to global data from wpa_supplicant_init()
 606  * Returns: 0 on success, -1 on failure
 607  *
 608  * Initialize the dbus control interface and start receiving commands from
 609  * external programs over the bus.
 610  */
 611 int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface)
 612 {
 613         DBusError error;
 614         int ret = -1;
 615         DBusObjectPathVTable wpas_vtable = {
 616                 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
 617         };
 618
 619         /* Register the message handler for the global dbus interface */
 620         if (!dbus_connection_register_object_path(iface->con,
 621                                                   WPAS_DBUS_PATH, &wpas_vtable,
 622                                                   iface)) {
 623                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 624                            "handler");
 625                 return -1;
 626         }
 627
 628         /* Register our service with the message bus */
 629         dbus_error_init(&error);
 630         switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
 631                                       0, &error)) {
 632         case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
 633                 ret = 0;
 634                 break;
 635         case DBUS_REQUEST_NAME_REPLY_EXISTS:
 636         case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
 637         case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
 638                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 639                            "already registered");
 640                 break;
 641         default:
 642                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 643                            "%s %s", error.name, error.message);
 644                 break;
 645         }
 646         dbus_error_free(&error);
 647
 648         if (ret != 0)
 649                 return -1;
 650
 651         wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
 652                    "'.");
 653
 654         return 0;
 655 }
 656
 657
 658 /**
 659  * wpas_dbus_register_new_iface - Register a new interface with dbus
 660  * @wpa_s: %wpa_supplicant interface description structure to register
 661  * Returns: 0 on success, -1 on error
 662  *
 663  * Registers a new interface with dbus and assigns it a dbus object path.
 664  */
 665 int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
 666 {
 667         struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus;
 668         DBusConnection * con;
 669         u32 next;
 670         DBusObjectPathVTable vtable = {
 671                 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
 672         };
 673
 674         /* Do nothing if the control interface is not turned on */
 675         if (ctrl_iface == NULL)
 676                 return 0;
 677
 678         con = ctrl_iface->con;
 679         next = ctrl_iface->next_objid++;
 680
 681         /* Create and set the interface's object path */
 682         wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
 683         if (wpa_s->dbus_path == NULL)
 684                 return -1;
 685         os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX,
 686                     WPAS_DBUS_PATH_INTERFACES "/%u",
 687                     next);
 688
 689         /* Register the message handler for the interface functions */
 690         if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable,
 691                                                wpa_s)) {
 692                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 693                            "handler for interface %s", wpa_s->ifname);
 694                 return -1;
 695         }
 696
 697         return 0;
 698 }
 699
 700
 701 /**
 702  * wpas_dbus_unregister_iface - Unregister an interface from dbus
 703  * @wpa_s: wpa_supplicant interface structure
 704  * Returns: 0 on success, -1 on failure
 705  *
 706  * Unregisters the interface with dbus
 707  */
 708 int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
 709 {
 710         struct wpas_dbus_priv *ctrl_iface;
 711         DBusConnection *con;
 712
 713         /* Do nothing if the control interface is not turned on */
 714         if (wpa_s == NULL || wpa_s->global == NULL)
 715                 return 0;
 716         ctrl_iface = wpa_s->global->dbus;
 717         if (ctrl_iface == NULL)
 718                 return 0;
 719
 720         con = ctrl_iface->con;
 721         if (!dbus_connection_unregister_object_path(con, wpa_s->dbus_path))
 722                 return -1;
 723
 724         os_free(wpa_s->dbus_path);
 725         wpa_s->dbus_path = NULL;
 726
 727         return 0;
 728 }
 729
 730
 731 /**
 732  * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
 733  * @global: Pointer to global data from wpa_supplicant_init()
 734  * @path: Pointer to a dbus object path representing an interface
 735  * Returns: Pointer to the interface or %NULL if not found
 736  */
 737 struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
 738         struct wpa_global *global, const char *path)
 739 {
 740         struct wpa_supplicant *wpa_s;
 741
 742         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 743                 if (strcmp(wpa_s->dbus_path, path) == 0)
 744                         return wpa_s;
 745         }
 746         return NULL;
 747 }