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 */ 33char * 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 */ 93DBusMessage * wpas_dbus_new_invalid_iface_error(DBusMessage *message) 94{ 95 return dbus_message_new_error( 96 message, WPAS_ERROR_INVALID_IFACE, 97 "wpa_supplicant knows nothing about 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 */ 108DBusMessage * 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 */ 122static 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 */ 138static 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 */ 170static 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 */ 202static 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); 242 243 if (errno != EINVAL) 244 reply = wpas_dispatch_network_method(message, wpa_s, 245 nid); 246 else 247 reply = wpas_dbus_new_invalid_network_error(message); 248 } else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) { 249 /* A method for one of this interface's scanned BSSIDs */ 250 reply = wpas_dispatch_bssid_method(message, wpa_s, bssid); 251 } else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) { 252 /* A method for an interface only. */ 253 if (!strcmp(method, "scan")) 254 reply = wpas_dbus_iface_scan(message, wpa_s); 255 else if (!strcmp(method, "scanResults")) 256 reply = wpas_dbus_iface_scan_results(message, wpa_s); 257 else if (!strcmp(method, "addNetwork")) 258 reply = wpas_dbus_iface_add_network(message, wpa_s); 259 else if (!strcmp(method, "removeNetwork")) 260 reply = wpas_dbus_iface_remove_network(message, wpa_s); 261 else if (!strcmp(method, "selectNetwork")) 262 reply = wpas_dbus_iface_select_network(message, wpa_s); 263 else if (!strcmp(method, "capabilities")) 264 reply = wpas_dbus_iface_capabilities(message, wpa_s); 265 else if (!strcmp(method, "disconnect")) 266 reply = wpas_dbus_iface_disconnect(message, wpa_s); 267 else if (!strcmp(method, "setAPScan")) 268 reply = wpas_dbus_iface_set_ap_scan(message, wpa_s); 269 else if (!strcmp(method, "setSmartcardModules")) 270 reply = wpas_dbus_iface_set_smartcard_modules(message, 271 wpa_s); 272 else if (!strcmp(method, "state")) 273 reply = wpas_dbus_iface_get_state(message, wpa_s); 274 else if (!strcmp(method, "scanning")) 275 reply = wpas_dbus_iface_get_scanning(message, wpa_s); 276#ifndef CONFIG_NO_CONFIG_BLOBS 277 else if (!strcmp(method, "setBlobs")) 278 reply = wpas_dbus_iface_set_blobs(message, wpa_s); 279 else if (!strcmp(method, "removeBlobs")) 280 reply = wpas_dbus_iface_remove_blobs(message, wpa_s); 281#endif /* CONFIG_NO_CONFIG_BLOBS */ 282#ifdef CONFIG_WPS 283 else if (os_strcmp(method, "wpsPbc") == 0) 284 reply = wpas_dbus_iface_wps_pbc(message, wpa_s); 285 else if (os_strcmp(method, "wpsPin") == 0) 286 reply = wpas_dbus_iface_wps_pin(message, wpa_s); 287 else if (os_strcmp(method, "wpsReg") == 0) 288 reply = wpas_dbus_iface_wps_reg(message, wpa_s); 289#endif /* CONFIG_WPS */ 290 else if (os_strcmp(method, "flush") == 0) 291 reply = wpas_dbus_iface_flush(message, wpa_s); 292 } 293 294 /* If the message was handled, send back the reply */ 295out: 296 if (reply) { 297 if (!dbus_message_get_no_reply(message)) 298 dbus_connection_send(connection, reply, NULL); 299 dbus_message_unref(reply); 300 } 301 302 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 */ 321static 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 wpa_printf(MSG_MSGDUMP, "dbus[old]: %s.%s (%s) [%s]", 337 msg_interface, method, path, 338 dbus_message_get_signature(message)); 339 340 /* Validate the method interface */ 341 if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0) 342 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; 343 344 if (!strcmp(path, WPAS_DBUS_PATH)) { 345 /* dispatch methods against our global dbus interface here */ 346 if (!strcmp(method, "addInterface")) { 347 reply = wpas_dbus_global_add_interface( 348 message, ctrl_iface->global); 349 } else if (!strcmp(method, "removeInterface")) { 350 reply = wpas_dbus_global_remove_interface( 351 message, ctrl_iface->global); 352 } else if (!strcmp(method, "getInterface")) { 353 reply = wpas_dbus_global_get_interface( 354 message, ctrl_iface->global); 355 } else if (!strcmp(method, "setDebugParams")) { 356 reply = wpas_dbus_global_set_debugparams( 357 message, ctrl_iface->global); 358 } 359 } 360 361 /* If the message was handled, send back the reply */ 362 if (reply) { 363 if (!dbus_message_get_no_reply(message)) 364 dbus_connection_send(connection, reply, NULL); 365 dbus_message_unref(reply); 366 } 367 368 return reply ? DBUS_HANDLER_RESULT_HANDLED : 369 DBUS_HANDLER_RESULT_NOT_YET_HANDLED; 370} 371 372 373/** 374 * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal 375 * @wpa_s: %wpa_supplicant network interface data 376 * Returns: 0 on success, -1 on failure 377 * 378 * Notify listeners that this interface has updated scan results. 379 */ 380void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s) 381{ 382 struct wpas_dbus_priv *iface = wpa_s->global->dbus; 383 DBusMessage *_signal; 384 385 /* Do nothing if the control interface is not turned on */ 386 if (iface == NULL || !wpa_s->dbus_path) 387 return; 388 389 _signal = dbus_message_new_signal(wpa_s->dbus_path, 390 WPAS_DBUS_IFACE_INTERFACE, 391 "ScanResultsAvailable"); 392 if (_signal == NULL) { 393 wpa_printf(MSG_ERROR, 394 "dbus: Not enough memory to send scan results signal"); 395 return; 396 } 397 dbus_connection_send(iface->con, _signal, NULL); 398 dbus_message_unref(_signal); 399} 400 401 402/** 403 * wpa_supplicant_dbus_notify_state_change - Send a state change signal 404 * @wpa_s: %wpa_supplicant network interface data 405 * @new_state: new state wpa_supplicant is entering 406 * @old_state: old state wpa_supplicant is leaving 407 * Returns: 0 on success, -1 on failure 408 * 409 * Notify listeners that wpa_supplicant has changed state 410 */ 411void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s, 412 enum wpa_states new_state, 413 enum wpa_states old_state) 414{ 415 struct wpas_dbus_priv *iface; 416 DBusMessage *_signal = NULL; 417 const char *new_state_str, *old_state_str; 418 419 if (wpa_s->dbus_path == NULL) 420 return; /* Skip signal since D-Bus setup is not yet ready */ 421 422 /* Do nothing if the control interface is not turned on */ 423 if (wpa_s->global == NULL) 424 return; 425 iface = wpa_s->global->dbus; 426 if (iface == NULL) 427 return; 428 429 /* Only send signal if state really changed */ 430 if (new_state == old_state) 431 return; 432 433 _signal = dbus_message_new_signal(wpa_s->dbus_path, 434 WPAS_DBUS_IFACE_INTERFACE, 435 "StateChange"); 436 if (_signal == NULL) { 437 wpa_printf(MSG_ERROR, 438 "dbus: %s: could not create dbus signal; likely out of memory", 439 __func__); 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: %s: Not enough memory to construct state change signal", 452 __func__); 453 goto out; 454 } 455 456 dbus_connection_send(iface->con, _signal, NULL); 457 458out: 459 dbus_message_unref(_signal); 460} 461 462 463/** 464 * wpa_supplicant_dbus_notify_scanning - send scanning status 465 * @wpa_s: %wpa_supplicant network interface data 466 * Returns: 0 on success, -1 on failure 467 * 468 * Notify listeners of interface scanning state changes 469 */ 470void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s) 471{ 472 struct wpas_dbus_priv *iface = wpa_s->global->dbus; 473 DBusMessage *_signal; 474 dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE; 475 476 /* Do nothing if the control interface is not turned on */ 477 if (iface == NULL || !wpa_s->dbus_path) 478 return; 479 480 _signal = dbus_message_new_signal(wpa_s->dbus_path, 481 WPAS_DBUS_IFACE_INTERFACE, 482 "Scanning"); 483 if (_signal == NULL) { 484 wpa_printf(MSG_ERROR, 485 "dbus: Not enough memory to send scan results signal"); 486 return; 487 } 488 489 if (dbus_message_append_args(_signal, 490 DBUS_TYPE_BOOLEAN, &scanning, 491 DBUS_TYPE_INVALID)) { 492 dbus_connection_send(iface->con, _signal, NULL); 493 } else { 494 wpa_printf(MSG_ERROR, 495 "dbus: Not enough memory to construct signal"); 496 } 497 dbus_message_unref(_signal); 498} 499 500 501#ifdef CONFIG_WPS 502void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s, 503 const struct wps_credential *cred) 504{ 505 struct wpas_dbus_priv *iface; 506 DBusMessage *_signal = NULL; 507 508 /* Do nothing if the control interface is not turned on */ 509 if (wpa_s->global == NULL) 510 return; 511 iface = wpa_s->global->dbus; 512 if (iface == NULL || !wpa_s->dbus_path) 513 return; 514 515 _signal = dbus_message_new_signal(wpa_s->dbus_path, 516 WPAS_DBUS_IFACE_INTERFACE, 517 "WpsCred"); 518 if (_signal == NULL) { 519 wpa_printf(MSG_ERROR, 520 "dbus: %s: Could not create dbus signal; likely out of memory", 521 __func__); 522 return; 523 } 524 525 if (!dbus_message_append_args(_signal, 526 DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, 527 &cred->cred_attr, cred->cred_attr_len, 528 DBUS_TYPE_INVALID)) { 529 wpa_printf(MSG_ERROR, 530 "dbus: %s: Not enough memory to construct signal", 531 __func__); 532 goto out; 533 } 534 535 dbus_connection_send(iface->con, _signal, NULL); 536 537out: 538 dbus_message_unref(_signal); 539} 540#else /* CONFIG_WPS */ 541void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s, 542 const struct wps_credential *cred) 543{ 544} 545#endif /* CONFIG_WPS */ 546 547void wpa_supplicant_dbus_notify_certification(struct wpa_supplicant *wpa_s, 548 int depth, const char *subject, 549 const char *cert_hash, 550 const struct wpabuf *cert) 551{ 552 struct wpas_dbus_priv *iface; 553 DBusMessage *_signal = NULL; 554 const char *hash; 555 const char *cert_hex; 556 int cert_hex_len; 557 558 /* Do nothing if the control interface is not turned on */ 559 if (wpa_s->global == NULL) 560 return; 561 iface = wpa_s->global->dbus; 562 if (iface == NULL || !wpa_s->dbus_path) 563 return; 564 565 _signal = dbus_message_new_signal(wpa_s->dbus_path, 566 WPAS_DBUS_IFACE_INTERFACE, 567 "Certification"); 568 if (_signal == NULL) { 569 wpa_printf(MSG_ERROR, 570 "dbus: %s: Could not create dbus signal; likely out of memory", 571 __func__); 572 return; 573 } 574 575 hash = cert_hash ? cert_hash : ""; 576 cert_hex = cert ? wpabuf_head(cert) : ""; 577 cert_hex_len = cert ? wpabuf_len(cert) : 0; 578 579 if (!dbus_message_append_args(_signal, 580 DBUS_TYPE_INT32, &depth, 581 DBUS_TYPE_STRING, &subject, 582 DBUS_TYPE_STRING, &hash, 583 DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, 584 &cert_hex, cert_hex_len, 585 DBUS_TYPE_INVALID)) { 586 wpa_printf(MSG_ERROR, 587 "dbus: %s: Not enough memory to construct signal", 588 __func__); 589 goto out; 590 } 591 592 dbus_connection_send(iface->con, _signal, NULL); 593 594out: 595 dbus_message_unref(_signal); 596 597} 598 599 600/** 601 * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface 602 * @global: Pointer to global data from wpa_supplicant_init() 603 * Returns: 0 on success, -1 on failure 604 * 605 * Initialize the dbus control interface and start receiving commands from 606 * external programs over the bus. 607 */ 608int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface) 609{ 610 DBusError error; 611 int ret = -1; 612 DBusObjectPathVTable wpas_vtable = { 613 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL 614 }; 615 616 /* Register the message handler for the global dbus interface */ 617 if (!dbus_connection_register_object_path(iface->con, 618 WPAS_DBUS_PATH, &wpas_vtable, 619 iface)) { 620 wpa_printf(MSG_ERROR, "dbus: Could not set up message handler"); 621 return -1; 622 } 623 624 /* Register our service with the message bus */ 625 dbus_error_init(&error); 626 switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE, 627 0, &error)) { 628 case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER: 629 ret = 0; 630 break; 631 case DBUS_REQUEST_NAME_REPLY_EXISTS: 632 case DBUS_REQUEST_NAME_REPLY_IN_QUEUE: 633 case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER: 634 wpa_printf(MSG_ERROR, 635 "dbus: Could not request service name: already registered"); 636 break; 637 default: 638 wpa_printf(MSG_ERROR, 639 "dbus: Could not request service name: %s %s", 640 error.name, error.message); 641 break; 642 } 643 dbus_error_free(&error); 644 645 if (ret != 0) 646 return -1; 647 648 wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE 649 "'."); 650 651 return 0; 652} 653 654 655/** 656 * wpas_dbus_register_new_iface - Register a new interface with dbus 657 * @wpa_s: %wpa_supplicant interface description structure to register 658 * Returns: 0 on success, -1 on error 659 * 660 * Registers a new interface with dbus and assigns it a dbus object path. 661 */ 662int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s) 663{ 664 struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus; 665 DBusConnection * con; 666 u32 next; 667 DBusObjectPathVTable vtable = { 668 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL 669 }; 670 671 /* Do nothing if the control interface is not turned on */ 672 if (ctrl_iface == NULL) 673 return 0; 674 675 con = ctrl_iface->con; 676 next = ctrl_iface->next_objid++; 677 678 /* Create and set the interface's object path */ 679 wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX); 680 if (wpa_s->dbus_path == NULL) 681 return -1; 682 os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX, 683 WPAS_DBUS_PATH_INTERFACES "/%u", 684 next); 685 686 /* Register the message handler for the interface functions */ 687 if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable, 688 wpa_s)) { 689 wpa_printf(MSG_ERROR, 690 "dbus: Could not set up message handler for interface %s", 691 wpa_s->ifname); 692 return -1; 693 } 694 695 return 0; 696} 697 698 699/** 700 * wpas_dbus_unregister_iface - Unregister an interface from dbus 701 * @wpa_s: wpa_supplicant interface structure 702 * Returns: 0 on success, -1 on failure 703 * 704 * Unregisters the interface with dbus 705 */ 706int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s) 707{ 708 struct wpas_dbus_priv *ctrl_iface; 709 DBusConnection *con; 710 711 /* Do nothing if the control interface is not turned on */ 712 if (wpa_s == NULL || wpa_s->global == NULL) 713 return 0; 714 ctrl_iface = wpa_s->global->dbus; 715 if (ctrl_iface == NULL || wpa_s->dbus_path == NULL) 716 return 0; 717 718 con = ctrl_iface->con; 719 if (!dbus_connection_unregister_object_path(con, wpa_s->dbus_path)) 720 return -1; 721 722 os_free(wpa_s->dbus_path); 723 wpa_s->dbus_path = NULL; 724 725 return 0; 726} 727 728 729/** 730 * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface 731 * @global: Pointer to global data from wpa_supplicant_init() 732 * @path: Pointer to a dbus object path representing an interface 733 * Returns: Pointer to the interface or %NULL if not found 734 */ 735struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path( 736 struct wpa_global *global, const char *path) 737{ 738 struct wpa_supplicant *wpa_s; 739 740 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { 741 if (wpa_s->dbus_path && strcmp(wpa_s->dbus_path, path) == 0) 742 return wpa_s; 743 } 744 return NULL; 745} 746