src/common/wpa_ctrl.h - third_party/hostap - Git at Google

 /*
  * wpa_supplicant/hostapd control interface library
  * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
  */

 #ifndef WPA_CTRL_H
 #define WPA_CTRL_H

 #ifdef  __cplusplus
 extern "C" {
 #endif

 /* wpa_supplicant control interface - fixed message prefixes */

 /** Interactive request for identity/password/pin */
 #define WPA_CTRL_REQ "CTRL-REQ-"

 /** Response to identity/password/pin request */
 #define WPA_CTRL_RSP "CTRL-RSP-"

 /* Event messages with fixed prefix */
 /** Authentication completed successfully and data connection enabled */
 #define WPA_EVENT_CONNECTED "CTRL-EVENT-CONNECTED "
 /** Disconnected, data connection is not available */
 #define WPA_EVENT_DISCONNECTED "CTRL-EVENT-DISCONNECTED "
 /** Association rejected during connection attempt */
 #define WPA_EVENT_ASSOC_REJECT "CTRL-EVENT-ASSOC-REJECT "
 /** Authentication rejected during connection attempt */
 #define WPA_EVENT_AUTH_REJECT "CTRL-EVENT-AUTH-REJECT "
 /** wpa_supplicant is exiting */
 #define WPA_EVENT_TERMINATING "CTRL-EVENT-TERMINATING "
 /** Password change was completed successfully */
 #define WPA_EVENT_PASSWORD_CHANGED "CTRL-EVENT-PASSWORD-CHANGED "
 /** EAP-Request/Notification received */
 #define WPA_EVENT_EAP_NOTIFICATION "CTRL-EVENT-EAP-NOTIFICATION "
 /** EAP authentication started (EAP-Request/Identity received) */
 #define WPA_EVENT_EAP_STARTED "CTRL-EVENT-EAP-STARTED "
 /** EAP method proposed by the server */
 #define WPA_EVENT_EAP_PROPOSED_METHOD "CTRL-EVENT-EAP-PROPOSED-METHOD "
 /** EAP method selected */
 #define WPA_EVENT_EAP_METHOD "CTRL-EVENT-EAP-METHOD "
 /** EAP peer certificate from TLS */
 #define WPA_EVENT_EAP_PEER_CERT "CTRL-EVENT-EAP-PEER-CERT "
 /** EAP peer certificate alternative subject name component from TLS */
 #define WPA_EVENT_EAP_PEER_ALT "CTRL-EVENT-EAP-PEER-ALT "
 /** EAP TLS certificate chain validation error */
 #define WPA_EVENT_EAP_TLS_CERT_ERROR "CTRL-EVENT-EAP-TLS-CERT-ERROR "
 /** EAP status */
 #define WPA_EVENT_EAP_STATUS "CTRL-EVENT-EAP-STATUS "
 /** EAP authentication completed successfully */
 #define WPA_EVENT_EAP_SUCCESS "CTRL-EVENT-EAP-SUCCESS "
 /** EAP authentication failed (EAP-Failure received) */
 #define WPA_EVENT_EAP_FAILURE "CTRL-EVENT-EAP-FAILURE "
 /** Network block temporarily disabled (e.g., due to authentication failure) */
 #define WPA_EVENT_TEMP_DISABLED "CTRL-EVENT-SSID-TEMP-DISABLED "
 /** Temporarily disabled network block re-enabled */
 #define WPA_EVENT_REENABLED "CTRL-EVENT-SSID-REENABLED "
 /** New scan started */
 #define WPA_EVENT_SCAN_STARTED "CTRL-EVENT-SCAN-STARTED "
 /** New scan results available */
 #define WPA_EVENT_SCAN_RESULTS "CTRL-EVENT-SCAN-RESULTS "
 /** Scan command failed */
 #define WPA_EVENT_SCAN_FAILED "CTRL-EVENT-SCAN-FAILED "
 /** wpa_supplicant state change */
 #define WPA_EVENT_STATE_CHANGE "CTRL-EVENT-STATE-CHANGE "
 /** A new BSS entry was added (followed by BSS entry id and BSSID) */
 #define WPA_EVENT_BSS_ADDED "CTRL-EVENT-BSS-ADDED "
 /** A BSS entry was removed (followed by BSS entry id and BSSID) */
 #define WPA_EVENT_BSS_REMOVED "CTRL-EVENT-BSS-REMOVED "
 /** No suitable network was found */
 #define WPA_EVENT_NETWORK_NOT_FOUND "CTRL-EVENT-NETWORK-NOT-FOUND "
 /** Change in the signal level was reported by the driver */
 #define WPA_EVENT_SIGNAL_CHANGE "CTRL-EVENT-SIGNAL-CHANGE "
 /** Regulatory domain channel */
 #define WPA_EVENT_REGDOM_CHANGE "CTRL-EVENT-REGDOM-CHANGE "

 /** RSN IBSS 4-way handshakes completed with specified peer */
 #define IBSS_RSN_COMPLETED "IBSS-RSN-COMPLETED "

 /** Notification of frequency conflict due to a concurrent operation.
  *
  * The indicated network is disabled and needs to be re-enabled before it can
  * be used again.
  */
 #define WPA_EVENT_FREQ_CONFLICT "CTRL-EVENT-FREQ-CONFLICT "
 /** Frequency ranges that the driver recommends to avoid */
 #define WPA_EVENT_AVOID_FREQ "CTRL-EVENT-AVOID-FREQ "
 /** WPS overlap detected in PBC mode */
 #define WPS_EVENT_OVERLAP "WPS-OVERLAP-DETECTED "
 /** Available WPS AP with active PBC found in scan results */
 #define WPS_EVENT_AP_AVAILABLE_PBC "WPS-AP-AVAILABLE-PBC "
 /** Available WPS AP with our address as authorized in scan results */
 #define WPS_EVENT_AP_AVAILABLE_AUTH "WPS-AP-AVAILABLE-AUTH "
 /** Available WPS AP with recently selected PIN registrar found in scan results
  */
 #define WPS_EVENT_AP_AVAILABLE_PIN "WPS-AP-AVAILABLE-PIN "
 /** Available WPS AP found in scan results */
 #define WPS_EVENT_AP_AVAILABLE "WPS-AP-AVAILABLE "
 /** A new credential received */
 #define WPS_EVENT_CRED_RECEIVED "WPS-CRED-RECEIVED "
 /** M2D received */
 #define WPS_EVENT_M2D "WPS-M2D "
 /** WPS registration failed after M2/M2D */
 #define WPS_EVENT_FAIL "WPS-FAIL "
 /** WPS registration completed successfully */
 #define WPS_EVENT_SUCCESS "WPS-SUCCESS "
 /** WPS enrollment attempt timed out and was terminated */
 #define WPS_EVENT_TIMEOUT "WPS-TIMEOUT "
 /* PBC mode was activated */
 #define WPS_EVENT_ACTIVE "WPS-PBC-ACTIVE "
 /* PBC mode was disabled */
 #define WPS_EVENT_DISABLE "WPS-PBC-DISABLE "

 #define WPS_EVENT_ENROLLEE_SEEN "WPS-ENROLLEE-SEEN "

 #define WPS_EVENT_OPEN_NETWORK "WPS-OPEN-NETWORK "

 /* WPS ER events */
 #define WPS_EVENT_ER_AP_ADD "WPS-ER-AP-ADD "
 #define WPS_EVENT_ER_AP_REMOVE "WPS-ER-AP-REMOVE "
 #define WPS_EVENT_ER_ENROLLEE_ADD "WPS-ER-ENROLLEE-ADD "
 #define WPS_EVENT_ER_ENROLLEE_REMOVE "WPS-ER-ENROLLEE-REMOVE "
 #define WPS_EVENT_ER_AP_SETTINGS "WPS-ER-AP-SETTINGS "
 #define WPS_EVENT_ER_SET_SEL_REG "WPS-ER-AP-SET-SEL-REG "

 /* MESH events */
 #define MESH_GROUP_STARTED "MESH-GROUP-STARTED "
 #define MESH_GROUP_REMOVED "MESH-GROUP-REMOVED "
 #define MESH_PEER_CONNECTED "MESH-PEER-CONNECTED "
 #define MESH_PEER_DISCONNECTED "MESH-PEER-DISCONNECTED "
 /** Mesh SAE authentication failure. Wrong password suspected. */
 #define MESH_SAE_AUTH_FAILURE "MESH-SAE-AUTH-FAILURE "
 #define MESH_SAE_AUTH_BLOCKED "MESH-SAE-AUTH-BLOCKED "

 /* WMM AC events */
 #define WMM_AC_EVENT_TSPEC_ADDED "TSPEC-ADDED "
 #define WMM_AC_EVENT_TSPEC_REMOVED "TSPEC-REMOVED "
 #define WMM_AC_EVENT_TSPEC_REQ_FAILED "TSPEC-REQ-FAILED "

 /** P2P device found */
 #define P2P_EVENT_DEVICE_FOUND "P2P-DEVICE-FOUND "

 /** P2P device lost */
 #define P2P_EVENT_DEVICE_LOST "P2P-DEVICE-LOST "

 /** A P2P device requested GO negotiation, but we were not ready to start the
  * negotiation */
 #define P2P_EVENT_GO_NEG_REQUEST "P2P-GO-NEG-REQUEST "
 #define P2P_EVENT_GO_NEG_SUCCESS "P2P-GO-NEG-SUCCESS "
 #define P2P_EVENT_GO_NEG_FAILURE "P2P-GO-NEG-FAILURE "
 #define P2P_EVENT_GROUP_FORMATION_SUCCESS "P2P-GROUP-FORMATION-SUCCESS "
 #define P2P_EVENT_GROUP_FORMATION_FAILURE "P2P-GROUP-FORMATION-FAILURE "
 #define P2P_EVENT_GROUP_STARTED "P2P-GROUP-STARTED "
 #define P2P_EVENT_GROUP_REMOVED "P2P-GROUP-REMOVED "
 #define P2P_EVENT_CROSS_CONNECT_ENABLE "P2P-CROSS-CONNECT-ENABLE "
 #define P2P_EVENT_CROSS_CONNECT_DISABLE "P2P-CROSS-CONNECT-DISABLE "
 /* parameters: <peer address> <PIN> */
 #define P2P_EVENT_PROV_DISC_SHOW_PIN "P2P-PROV-DISC-SHOW-PIN "
 /* parameters: <peer address> */
 #define P2P_EVENT_PROV_DISC_ENTER_PIN "P2P-PROV-DISC-ENTER-PIN "
 /* parameters: <peer address> */
 #define P2P_EVENT_PROV_DISC_PBC_REQ "P2P-PROV-DISC-PBC-REQ "
 /* parameters: <peer address> */
 #define P2P_EVENT_PROV_DISC_PBC_RESP "P2P-PROV-DISC-PBC-RESP "
 /* parameters: <peer address> <status> */
 #define P2P_EVENT_PROV_DISC_FAILURE "P2P-PROV-DISC-FAILURE"
 /* parameters: <freq> <src addr> <dialog token> <update indicator> <TLVs> */
 #define P2P_EVENT_SERV_DISC_REQ "P2P-SERV-DISC-REQ "
 /* parameters: <src addr> <update indicator> <TLVs> */
 #define P2P_EVENT_SERV_DISC_RESP "P2P-SERV-DISC-RESP "
 #define P2P_EVENT_SERV_ASP_RESP "P2P-SERV-ASP-RESP "
 #define P2P_EVENT_INVITATION_RECEIVED "P2P-INVITATION-RECEIVED "
 #define P2P_EVENT_INVITATION_RESULT "P2P-INVITATION-RESULT "
 #define P2P_EVENT_FIND_STOPPED "P2P-FIND-STOPPED "
 #define P2P_EVENT_PERSISTENT_PSK_FAIL "P2P-PERSISTENT-PSK-FAIL id="
 #define P2P_EVENT_PRESENCE_RESPONSE "P2P-PRESENCE-RESPONSE "
 #define P2P_EVENT_NFC_BOTH_GO "P2P-NFC-BOTH-GO "
 #define P2P_EVENT_NFC_PEER_CLIENT "P2P-NFC-PEER-CLIENT "
 #define P2P_EVENT_NFC_WHILE_CLIENT "P2P-NFC-WHILE-CLIENT "
 #define P2P_EVENT_FALLBACK_TO_GO_NEG "P2P-FALLBACK-TO-GO-NEG "
 #define P2P_EVENT_FALLBACK_TO_GO_NEG_ENABLED "P2P-FALLBACK-TO-GO-NEG-ENABLED "

 /* parameters: <PMF enabled> <timeout in ms> <Session Information URL> */
 #define ESS_DISASSOC_IMMINENT "ESS-DISASSOC-IMMINENT "
 #define P2P_EVENT_REMOVE_AND_REFORM_GROUP "P2P-REMOVE-AND-REFORM-GROUP "

 #define P2P_EVENT_P2PS_PROVISION_START "P2PS-PROV-START "
 #define P2P_EVENT_P2PS_PROVISION_DONE "P2PS-PROV-DONE "

 #define INTERWORKING_AP "INTERWORKING-AP "
 #define INTERWORKING_BLACKLISTED "INTERWORKING-BLACKLISTED "
 #define INTERWORKING_NO_MATCH "INTERWORKING-NO-MATCH "
 #define INTERWORKING_ALREADY_CONNECTED "INTERWORKING-ALREADY-CONNECTED "
 #define INTERWORKING_SELECTED "INTERWORKING-SELECTED "

 /* Credential block added; parameters: <id> */
 #define CRED_ADDED "CRED-ADDED "
 /* Credential block modified; parameters: <id> <field> */
 #define CRED_MODIFIED "CRED-MODIFIED "
 /* Credential block removed; parameters: <id> */
 #define CRED_REMOVED "CRED-REMOVED "

 #define GAS_RESPONSE_INFO "GAS-RESPONSE-INFO "
 /* parameters: <addr> <dialog_token> <freq> */
 #define GAS_QUERY_START "GAS-QUERY-START "
 /* parameters: <addr> <dialog_token> <freq> <status_code> <result> */
 #define GAS_QUERY_DONE "GAS-QUERY-DONE "

 /* parameters: <addr> <result> */
 #define ANQP_QUERY_DONE "ANQP-QUERY-DONE "

 #define HS20_SUBSCRIPTION_REMEDIATION "HS20-SUBSCRIPTION-REMEDIATION "
 #define HS20_DEAUTH_IMMINENT_NOTICE "HS20-DEAUTH-IMMINENT-NOTICE "

 #define EXT_RADIO_WORK_START "EXT-RADIO-WORK-START "
 #define EXT_RADIO_WORK_TIMEOUT "EXT-RADIO-WORK-TIMEOUT "

 #define RRM_EVENT_NEIGHBOR_REP_RXED "RRM-NEIGHBOR-REP-RECEIVED "
 #define RRM_EVENT_NEIGHBOR_REP_FAILED "RRM-NEIGHBOR-REP-REQUEST-FAILED "

 /* hostapd control interface - fixed message prefixes */
 #define WPS_EVENT_PIN_NEEDED "WPS-PIN-NEEDED "
 #define WPS_EVENT_NEW_AP_SETTINGS "WPS-NEW-AP-SETTINGS "
 #define WPS_EVENT_REG_SUCCESS "WPS-REG-SUCCESS "
 #define WPS_EVENT_AP_SETUP_LOCKED "WPS-AP-SETUP-LOCKED "
 #define WPS_EVENT_AP_SETUP_UNLOCKED "WPS-AP-SETUP-UNLOCKED "
 #define WPS_EVENT_AP_PIN_ENABLED "WPS-AP-PIN-ENABLED "
 #define WPS_EVENT_AP_PIN_DISABLED "WPS-AP-PIN-DISABLED "
 #define AP_STA_CONNECTED "AP-STA-CONNECTED "
 #define AP_STA_DISCONNECTED "AP-STA-DISCONNECTED "
 #define AP_STA_POSSIBLE_PSK_MISMATCH "AP-STA-POSSIBLE-PSK-MISMATCH "

 #define AP_REJECTED_MAX_STA "AP-REJECTED-MAX-STA "
 #define AP_REJECTED_BLOCKED_STA "AP-REJECTED-BLOCKED-STA "

 #define AP_EVENT_ENABLED "AP-ENABLED "
 #define AP_EVENT_DISABLED "AP-DISABLED "

 #define INTERFACE_ENABLED "INTERFACE-ENABLED "
 #define INTERFACE_DISABLED "INTERFACE-DISABLED "

 #define ACS_EVENT_STARTED "ACS-STARTED "
 #define ACS_EVENT_COMPLETED "ACS-COMPLETED "
 #define ACS_EVENT_FAILED "ACS-FAILED "

 #define DFS_EVENT_RADAR_DETECTED "DFS-RADAR-DETECTED "
 #define DFS_EVENT_NEW_CHANNEL "DFS-NEW-CHANNEL "
 #define DFS_EVENT_CAC_START "DFS-CAC-START "
 #define DFS_EVENT_CAC_COMPLETED "DFS-CAC-COMPLETED "
 #define DFS_EVENT_NOP_FINISHED "DFS-NOP-FINISHED "

 #define AP_CSA_FINISHED "AP-CSA-FINISHED "

 /* BSS Transition Management Response frame received */
 #define BSS_TM_RESP "BSS-TM-RESP "

 /* BSS command information masks */

 #define WPA_BSS_MASK_ALL		0xFFFDFFFF
 #define WPA_BSS_MASK_ID			BIT(0)
 #define WPA_BSS_MASK_BSSID		BIT(1)
 #define WPA_BSS_MASK_FREQ		BIT(2)
 #define WPA_BSS_MASK_BEACON_INT		BIT(3)
 #define WPA_BSS_MASK_CAPABILITIES	BIT(4)
 #define WPA_BSS_MASK_QUAL		BIT(5)
 #define WPA_BSS_MASK_NOISE		BIT(6)
 #define WPA_BSS_MASK_LEVEL		BIT(7)
 #define WPA_BSS_MASK_TSF		BIT(8)
 #define WPA_BSS_MASK_AGE		BIT(9)
 #define WPA_BSS_MASK_IE			BIT(10)
 #define WPA_BSS_MASK_FLAGS		BIT(11)
 #define WPA_BSS_MASK_SSID		BIT(12)
 #define WPA_BSS_MASK_WPS_SCAN		BIT(13)
 #define WPA_BSS_MASK_P2P_SCAN		BIT(14)
 #define WPA_BSS_MASK_INTERNETW		BIT(15)
 #define WPA_BSS_MASK_WIFI_DISPLAY	BIT(16)
 #define WPA_BSS_MASK_DELIM		BIT(17)
 #define WPA_BSS_MASK_MESH_SCAN		BIT(18)
 #define WPA_BSS_MASK_SNR		BIT(19)
 #define WPA_BSS_MASK_EST_THROUGHPUT	BIT(20)
 #define WPA_BSS_MASK_FST		BIT(21)


 /* VENDOR_ELEM_* frame id values */
 enum wpa_vendor_elem_frame {
 	VENDOR_ELEM_PROBE_REQ_P2P = 0,
 	VENDOR_ELEM_PROBE_RESP_P2P = 1,
 	VENDOR_ELEM_PROBE_RESP_P2P_GO = 2,
 	VENDOR_ELEM_BEACON_P2P_GO = 3,
 	VENDOR_ELEM_P2P_PD_REQ = 4,
 	VENDOR_ELEM_P2P_PD_RESP = 5,
 	VENDOR_ELEM_P2P_GO_NEG_REQ = 6,
 	VENDOR_ELEM_P2P_GO_NEG_RESP = 7,
 	VENDOR_ELEM_P2P_GO_NEG_CONF = 8,
 	VENDOR_ELEM_P2P_INV_REQ = 9,
 	VENDOR_ELEM_P2P_INV_RESP = 10,
 	VENDOR_ELEM_P2P_ASSOC_REQ = 11,
 	VENDOR_ELEM_P2P_ASSOC_RESP = 12,
 	VENDOR_ELEM_ASSOC_REQ = 13,
 	NUM_VENDOR_ELEM_FRAMES
 };


 /* wpa_supplicant/hostapd control interface access */

 /**
  * wpa_ctrl_open - Open a control interface to wpa_supplicant/hostapd
  * @ctrl_path: Path for UNIX domain sockets; ignored if UDP sockets are used.
  * Returns: Pointer to abstract control interface data or %NULL on failure
  *
  * This function is used to open a control interface to wpa_supplicant/hostapd.
  * ctrl_path is usually /var/run/wpa_supplicant or /var/run/hostapd. This path
  * is configured in wpa_supplicant/hostapd and other programs using the control
  * interface need to use matching path configuration.
  */
 struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path);

 /**
  * wpa_ctrl_open2 - Open a control interface to wpa_supplicant/hostapd
  * @ctrl_path: Path for UNIX domain sockets; ignored if UDP sockets are used.
  * @cli_path: Path for client UNIX domain sockets; ignored if UDP socket
  *            is used.
  * Returns: Pointer to abstract control interface data or %NULL on failure
  *
  * This function is used to open a control interface to wpa_supplicant/hostapd
  * when the socket path for client need to be specified explicitly. Default
  * ctrl_path is usually /var/run/wpa_supplicant or /var/run/hostapd and client
  * socket path is /tmp.
  */
 struct wpa_ctrl * wpa_ctrl_open2(const char *ctrl_path, const char *cli_path);


 /**
  * wpa_ctrl_close - Close a control interface to wpa_supplicant/hostapd
  * @ctrl: Control interface data from wpa_ctrl_open()
  *
  * This function is used to close a control interface.
  */
 void wpa_ctrl_close(struct wpa_ctrl *ctrl);


 /**
  * wpa_ctrl_request - Send a command to wpa_supplicant/hostapd
  * @ctrl: Control interface data from wpa_ctrl_open()
  * @cmd: Command; usually, ASCII text, e.g., "PING"
  * @cmd_len: Length of the cmd in bytes
  * @reply: Buffer for the response
  * @reply_len: Reply buffer length
  * @msg_cb: Callback function for unsolicited messages or %NULL if not used
  * Returns: 0 on success, -1 on error (send or receive failed), -2 on timeout
  *
  * This function is used to send commands to wpa_supplicant/hostapd. Received
  * response will be written to reply and reply_len is set to the actual length
  * of the reply. This function will block for up to two seconds while waiting
  * for the reply. If unsolicited messages are received, the blocking time may
  * be longer.
  *
  * msg_cb can be used to register a callback function that will be called for
  * unsolicited messages received while waiting for the command response. These
  * messages may be received if wpa_ctrl_request() is called at the same time as
  * wpa_supplicant/hostapd is sending such a message. This can happen only if
  * the program has used wpa_ctrl_attach() to register itself as a monitor for
  * event messages. Alternatively to msg_cb, programs can register two control
  * interface connections and use one of them for commands and the other one for
  * receiving event messages, in other words, call wpa_ctrl_attach() only for
  * the control interface connection that will be used for event messages.
  */
 int wpa_ctrl_request(struct wpa_ctrl *ctrl, const char *cmd, size_t cmd_len,
 		     char *reply, size_t *reply_len,
 		     void (*msg_cb)(char *msg, size_t len));


 /**
  * wpa_ctrl_attach - Register as an event monitor for the control interface
  * @ctrl: Control interface data from wpa_ctrl_open()
  * Returns: 0 on success, -1 on failure, -2 on timeout
  *
  * This function registers the control interface connection as a monitor for
  * wpa_supplicant/hostapd events. After a success wpa_ctrl_attach() call, the
  * control interface connection starts receiving event messages that can be
  * read with wpa_ctrl_recv().
  */
 int wpa_ctrl_attach(struct wpa_ctrl *ctrl);


 /**
  * wpa_ctrl_detach - Unregister event monitor from the control interface
  * @ctrl: Control interface data from wpa_ctrl_open()
  * Returns: 0 on success, -1 on failure, -2 on timeout
  *
  * This function unregisters the control interface connection as a monitor for
  * wpa_supplicant/hostapd events, i.e., cancels the registration done with
  * wpa_ctrl_attach().
  */
 int wpa_ctrl_detach(struct wpa_ctrl *ctrl);


 /**
  * wpa_ctrl_recv - Receive a pending control interface message
  * @ctrl: Control interface data from wpa_ctrl_open()
  * @reply: Buffer for the message data
  * @reply_len: Length of the reply buffer
  * Returns: 0 on success, -1 on failure
  *
  * This function will receive a pending control interface message. The received
  * response will be written to reply and reply_len is set to the actual length
  * of the reply.

  * wpa_ctrl_recv() is only used for event messages, i.e., wpa_ctrl_attach()
  * must have been used to register the control interface as an event monitor.
  */
 int wpa_ctrl_recv(struct wpa_ctrl *ctrl, char *reply, size_t *reply_len);


 /**
  * wpa_ctrl_pending - Check whether there are pending event messages
  * @ctrl: Control interface data from wpa_ctrl_open()
  * Returns: 1 if there are pending messages, 0 if no, or -1 on error
  *
  * This function will check whether there are any pending control interface
  * message available to be received with wpa_ctrl_recv(). wpa_ctrl_pending() is
  * only used for event messages, i.e., wpa_ctrl_attach() must have been used to
  * register the control interface as an event monitor.
  */
 int wpa_ctrl_pending(struct wpa_ctrl *ctrl);


 /**
  * wpa_ctrl_get_fd - Get file descriptor used by the control interface
  * @ctrl: Control interface data from wpa_ctrl_open()
  * Returns: File descriptor used for the connection
  *
  * This function can be used to get the file descriptor that is used for the
  * control interface connection. The returned value can be used, e.g., with
  * select() while waiting for multiple events.
  *
  * The returned file descriptor must not be used directly for sending or
  * receiving packets; instead, the library functions wpa_ctrl_request() and
  * wpa_ctrl_recv() must be used for this.
  */
 int wpa_ctrl_get_fd(struct wpa_ctrl *ctrl);

 #ifdef ANDROID
 /**
  * wpa_ctrl_cleanup() - Delete any local UNIX domain socket files that
  * may be left over from clients that were previously connected to
  * wpa_supplicant. This keeps these files from being orphaned in the
  * event of crashes that prevented them from being removed as part
  * of the normal orderly shutdown.
  */
 void wpa_ctrl_cleanup(void);
 #endif /* ANDROID */

 #ifdef CONFIG_CTRL_IFACE_UDP
 /* Port range for multiple wpa_supplicant instances and multiple VIFs */
 #define WPA_CTRL_IFACE_PORT 9877
 #define WPA_CTRL_IFACE_PORT_LIMIT 50 /* decremented from start */
 #define WPA_GLOBAL_CTRL_IFACE_PORT 9878
 #define WPA_GLOBAL_CTRL_IFACE_PORT_LIMIT 20 /* incremented from start */

 char * wpa_ctrl_get_remote_ifname(struct wpa_ctrl *ctrl);
 #endif /* CONFIG_CTRL_IFACE_UDP */


 #ifdef  __cplusplus
 }
 #endif

 #endif /* WPA_CTRL_H */
	/*
	* wpa_supplicant/hostapd control interface library
	* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
	*
	* This software may be distributed under the terms of the BSD license.
	* See README for more details.
	*/

	#ifndef WPA_CTRL_H
	#define WPA_CTRL_H

	#ifdef __cplusplus
	extern "C" {
	#endif

	/* wpa_supplicant control interface - fixed message prefixes */

	/** Interactive request for identity/password/pin */
	#define WPA_CTRL_REQ "CTRL-REQ-"

	/** Response to identity/password/pin request */
	#define WPA_CTRL_RSP "CTRL-RSP-"

	/* Event messages with fixed prefix */
	/** Authentication completed successfully and data connection enabled */
	#define WPA_EVENT_CONNECTED "CTRL-EVENT-CONNECTED "
	/** Disconnected, data connection is not available */
	#define WPA_EVENT_DISCONNECTED "CTRL-EVENT-DISCONNECTED "
	/** Association rejected during connection attempt */
	#define WPA_EVENT_ASSOC_REJECT "CTRL-EVENT-ASSOC-REJECT "
	/** Authentication rejected during connection attempt */
	#define WPA_EVENT_AUTH_REJECT "CTRL-EVENT-AUTH-REJECT "
	/** wpa_supplicant is exiting */
	#define WPA_EVENT_TERMINATING "CTRL-EVENT-TERMINATING "
	/** Password change was completed successfully */
	#define WPA_EVENT_PASSWORD_CHANGED "CTRL-EVENT-PASSWORD-CHANGED "
	/** EAP-Request/Notification received */
	#define WPA_EVENT_EAP_NOTIFICATION "CTRL-EVENT-EAP-NOTIFICATION "
	/** EAP authentication started (EAP-Request/Identity received) */
	#define WPA_EVENT_EAP_STARTED "CTRL-EVENT-EAP-STARTED "
	/** EAP method proposed by the server */
	#define WPA_EVENT_EAP_PROPOSED_METHOD "CTRL-EVENT-EAP-PROPOSED-METHOD "
	/** EAP method selected */
	#define WPA_EVENT_EAP_METHOD "CTRL-EVENT-EAP-METHOD "
	/** EAP peer certificate from TLS */
	#define WPA_EVENT_EAP_PEER_CERT "CTRL-EVENT-EAP-PEER-CERT "
	/** EAP peer certificate alternative subject name component from TLS */
	#define WPA_EVENT_EAP_PEER_ALT "CTRL-EVENT-EAP-PEER-ALT "
	/** EAP TLS certificate chain validation error */
	#define WPA_EVENT_EAP_TLS_CERT_ERROR "CTRL-EVENT-EAP-TLS-CERT-ERROR "
	/** EAP status */
	#define WPA_EVENT_EAP_STATUS "CTRL-EVENT-EAP-STATUS "
	/** EAP authentication completed successfully */
	#define WPA_EVENT_EAP_SUCCESS "CTRL-EVENT-EAP-SUCCESS "
	/** EAP authentication failed (EAP-Failure received) */
	#define WPA_EVENT_EAP_FAILURE "CTRL-EVENT-EAP-FAILURE "
	/** Network block temporarily disabled (e.g., due to authentication failure) */
	#define WPA_EVENT_TEMP_DISABLED "CTRL-EVENT-SSID-TEMP-DISABLED "
	/** Temporarily disabled network block re-enabled */
	#define WPA_EVENT_REENABLED "CTRL-EVENT-SSID-REENABLED "
	/** New scan started */
	#define WPA_EVENT_SCAN_STARTED "CTRL-EVENT-SCAN-STARTED "
	/** New scan results available */
	#define WPA_EVENT_SCAN_RESULTS "CTRL-EVENT-SCAN-RESULTS "
	/** Scan command failed */
	#define WPA_EVENT_SCAN_FAILED "CTRL-EVENT-SCAN-FAILED "
	/** wpa_supplicant state change */
	#define WPA_EVENT_STATE_CHANGE "CTRL-EVENT-STATE-CHANGE "
	/** A new BSS entry was added (followed by BSS entry id and BSSID) */
	#define WPA_EVENT_BSS_ADDED "CTRL-EVENT-BSS-ADDED "
	/** A BSS entry was removed (followed by BSS entry id and BSSID) */
	#define WPA_EVENT_BSS_REMOVED "CTRL-EVENT-BSS-REMOVED "
	/** No suitable network was found */
	#define WPA_EVENT_NETWORK_NOT_FOUND "CTRL-EVENT-NETWORK-NOT-FOUND "
	/** Change in the signal level was reported by the driver */
	#define WPA_EVENT_SIGNAL_CHANGE "CTRL-EVENT-SIGNAL-CHANGE "
	/** Regulatory domain channel */
	#define WPA_EVENT_REGDOM_CHANGE "CTRL-EVENT-REGDOM-CHANGE "

	/** RSN IBSS 4-way handshakes completed with specified peer */
	#define IBSS_RSN_COMPLETED "IBSS-RSN-COMPLETED "

	/** Notification of frequency conflict due to a concurrent operation.
	*
	* The indicated network is disabled and needs to be re-enabled before it can
	* be used again.
	*/
	#define WPA_EVENT_FREQ_CONFLICT "CTRL-EVENT-FREQ-CONFLICT "
	/** Frequency ranges that the driver recommends to avoid */
	#define WPA_EVENT_AVOID_FREQ "CTRL-EVENT-AVOID-FREQ "
	/** WPS overlap detected in PBC mode */
	#define WPS_EVENT_OVERLAP "WPS-OVERLAP-DETECTED "
	/** Available WPS AP with active PBC found in scan results */
	#define WPS_EVENT_AP_AVAILABLE_PBC "WPS-AP-AVAILABLE-PBC "
	/** Available WPS AP with our address as authorized in scan results */
	#define WPS_EVENT_AP_AVAILABLE_AUTH "WPS-AP-AVAILABLE-AUTH "
	/** Available WPS AP with recently selected PIN registrar found in scan results
	*/
	#define WPS_EVENT_AP_AVAILABLE_PIN "WPS-AP-AVAILABLE-PIN "
	/** Available WPS AP found in scan results */
	#define WPS_EVENT_AP_AVAILABLE "WPS-AP-AVAILABLE "
	/** A new credential received */
	#define WPS_EVENT_CRED_RECEIVED "WPS-CRED-RECEIVED "
	/** M2D received */
	#define WPS_EVENT_M2D "WPS-M2D "
	/** WPS registration failed after M2/M2D */
	#define WPS_EVENT_FAIL "WPS-FAIL "
	/** WPS registration completed successfully */
	#define WPS_EVENT_SUCCESS "WPS-SUCCESS "
	/** WPS enrollment attempt timed out and was terminated */
	#define WPS_EVENT_TIMEOUT "WPS-TIMEOUT "
	/* PBC mode was activated */
	#define WPS_EVENT_ACTIVE "WPS-PBC-ACTIVE "
	/* PBC mode was disabled */
	#define WPS_EVENT_DISABLE "WPS-PBC-DISABLE "

	#define WPS_EVENT_ENROLLEE_SEEN "WPS-ENROLLEE-SEEN "

	#define WPS_EVENT_OPEN_NETWORK "WPS-OPEN-NETWORK "

	/* WPS ER events */
	#define WPS_EVENT_ER_AP_ADD "WPS-ER-AP-ADD "
	#define WPS_EVENT_ER_AP_REMOVE "WPS-ER-AP-REMOVE "
	#define WPS_EVENT_ER_ENROLLEE_ADD "WPS-ER-ENROLLEE-ADD "
	#define WPS_EVENT_ER_ENROLLEE_REMOVE "WPS-ER-ENROLLEE-REMOVE "
	#define WPS_EVENT_ER_AP_SETTINGS "WPS-ER-AP-SETTINGS "
	#define WPS_EVENT_ER_SET_SEL_REG "WPS-ER-AP-SET-SEL-REG "

	/* MESH events */
	#define MESH_GROUP_STARTED "MESH-GROUP-STARTED "
	#define MESH_GROUP_REMOVED "MESH-GROUP-REMOVED "
	#define MESH_PEER_CONNECTED "MESH-PEER-CONNECTED "
	#define MESH_PEER_DISCONNECTED "MESH-PEER-DISCONNECTED "
	/** Mesh SAE authentication failure. Wrong password suspected. */
	#define MESH_SAE_AUTH_FAILURE "MESH-SAE-AUTH-FAILURE "
	#define MESH_SAE_AUTH_BLOCKED "MESH-SAE-AUTH-BLOCKED "

	/* WMM AC events */
	#define WMM_AC_EVENT_TSPEC_ADDED "TSPEC-ADDED "
	#define WMM_AC_EVENT_TSPEC_REMOVED "TSPEC-REMOVED "
	#define WMM_AC_EVENT_TSPEC_REQ_FAILED "TSPEC-REQ-FAILED "

	/** P2P device found */
	#define P2P_EVENT_DEVICE_FOUND "P2P-DEVICE-FOUND "

	/** P2P device lost */
	#define P2P_EVENT_DEVICE_LOST "P2P-DEVICE-LOST "

	/** A P2P device requested GO negotiation, but we were not ready to start the
	* negotiation */
	#define P2P_EVENT_GO_NEG_REQUEST "P2P-GO-NEG-REQUEST "
	#define P2P_EVENT_GO_NEG_SUCCESS "P2P-GO-NEG-SUCCESS "
	#define P2P_EVENT_GO_NEG_FAILURE "P2P-GO-NEG-FAILURE "
	#define P2P_EVENT_GROUP_FORMATION_SUCCESS "P2P-GROUP-FORMATION-SUCCESS "
	#define P2P_EVENT_GROUP_FORMATION_FAILURE "P2P-GROUP-FORMATION-FAILURE "
	#define P2P_EVENT_GROUP_STARTED "P2P-GROUP-STARTED "
	#define P2P_EVENT_GROUP_REMOVED "P2P-GROUP-REMOVED "
	#define P2P_EVENT_CROSS_CONNECT_ENABLE "P2P-CROSS-CONNECT-ENABLE "
	#define P2P_EVENT_CROSS_CONNECT_DISABLE "P2P-CROSS-CONNECT-DISABLE "
	/* parameters: <peer address> <PIN> */
	#define P2P_EVENT_PROV_DISC_SHOW_PIN "P2P-PROV-DISC-SHOW-PIN "
	/* parameters: <peer address> */
	#define P2P_EVENT_PROV_DISC_ENTER_PIN "P2P-PROV-DISC-ENTER-PIN "
	/* parameters: <peer address> */
	#define P2P_EVENT_PROV_DISC_PBC_REQ "P2P-PROV-DISC-PBC-REQ "
	/* parameters: <peer address> */
	#define P2P_EVENT_PROV_DISC_PBC_RESP "P2P-PROV-DISC-PBC-RESP "
	/* parameters: <peer address> <status> */
	#define P2P_EVENT_PROV_DISC_FAILURE "P2P-PROV-DISC-FAILURE"
	/* parameters: <freq> <src addr> <dialog token> <update indicator> <TLVs> */
	#define P2P_EVENT_SERV_DISC_REQ "P2P-SERV-DISC-REQ "
	/* parameters: <src addr> <update indicator> <TLVs> */
	#define P2P_EVENT_SERV_DISC_RESP "P2P-SERV-DISC-RESP "
	#define P2P_EVENT_SERV_ASP_RESP "P2P-SERV-ASP-RESP "
	#define P2P_EVENT_INVITATION_RECEIVED "P2P-INVITATION-RECEIVED "
	#define P2P_EVENT_INVITATION_RESULT "P2P-INVITATION-RESULT "
	#define P2P_EVENT_FIND_STOPPED "P2P-FIND-STOPPED "
	#define P2P_EVENT_PERSISTENT_PSK_FAIL "P2P-PERSISTENT-PSK-FAIL id="
	#define P2P_EVENT_PRESENCE_RESPONSE "P2P-PRESENCE-RESPONSE "
	#define P2P_EVENT_NFC_BOTH_GO "P2P-NFC-BOTH-GO "
	#define P2P_EVENT_NFC_PEER_CLIENT "P2P-NFC-PEER-CLIENT "
	#define P2P_EVENT_NFC_WHILE_CLIENT "P2P-NFC-WHILE-CLIENT "
	#define P2P_EVENT_FALLBACK_TO_GO_NEG "P2P-FALLBACK-TO-GO-NEG "
	#define P2P_EVENT_FALLBACK_TO_GO_NEG_ENABLED "P2P-FALLBACK-TO-GO-NEG-ENABLED "

	/* parameters: <PMF enabled> <timeout in ms> <Session Information URL> */
	#define ESS_DISASSOC_IMMINENT "ESS-DISASSOC-IMMINENT "
	#define P2P_EVENT_REMOVE_AND_REFORM_GROUP "P2P-REMOVE-AND-REFORM-GROUP "

	#define P2P_EVENT_P2PS_PROVISION_START "P2PS-PROV-START "
	#define P2P_EVENT_P2PS_PROVISION_DONE "P2PS-PROV-DONE "

	#define INTERWORKING_AP "INTERWORKING-AP "
	#define INTERWORKING_BLACKLISTED "INTERWORKING-BLACKLISTED "
	#define INTERWORKING_NO_MATCH "INTERWORKING-NO-MATCH "
	#define INTERWORKING_ALREADY_CONNECTED "INTERWORKING-ALREADY-CONNECTED "
	#define INTERWORKING_SELECTED "INTERWORKING-SELECTED "

	/* Credential block added; parameters: <id> */
	#define CRED_ADDED "CRED-ADDED "
	/* Credential block modified; parameters: <id> <field> */
	#define CRED_MODIFIED "CRED-MODIFIED "
	/* Credential block removed; parameters: <id> */
	#define CRED_REMOVED "CRED-REMOVED "

	#define GAS_RESPONSE_INFO "GAS-RESPONSE-INFO "
	/* parameters: <addr> <dialog_token> <freq> */
	#define GAS_QUERY_START "GAS-QUERY-START "
	/* parameters: <addr> <dialog_token> <freq> <status_code> <result> */
	#define GAS_QUERY_DONE "GAS-QUERY-DONE "

	/* parameters: <addr> <result> */
	#define ANQP_QUERY_DONE "ANQP-QUERY-DONE "

	#define HS20_SUBSCRIPTION_REMEDIATION "HS20-SUBSCRIPTION-REMEDIATION "
	#define HS20_DEAUTH_IMMINENT_NOTICE "HS20-DEAUTH-IMMINENT-NOTICE "

	#define EXT_RADIO_WORK_START "EXT-RADIO-WORK-START "
	#define EXT_RADIO_WORK_TIMEOUT "EXT-RADIO-WORK-TIMEOUT "

	#define RRM_EVENT_NEIGHBOR_REP_RXED "RRM-NEIGHBOR-REP-RECEIVED "
	#define RRM_EVENT_NEIGHBOR_REP_FAILED "RRM-NEIGHBOR-REP-REQUEST-FAILED "

	/* hostapd control interface - fixed message prefixes */
	#define WPS_EVENT_PIN_NEEDED "WPS-PIN-NEEDED "
	#define WPS_EVENT_NEW_AP_SETTINGS "WPS-NEW-AP-SETTINGS "
	#define WPS_EVENT_REG_SUCCESS "WPS-REG-SUCCESS "
	#define WPS_EVENT_AP_SETUP_LOCKED "WPS-AP-SETUP-LOCKED "
	#define WPS_EVENT_AP_SETUP_UNLOCKED "WPS-AP-SETUP-UNLOCKED "
	#define WPS_EVENT_AP_PIN_ENABLED "WPS-AP-PIN-ENABLED "
	#define WPS_EVENT_AP_PIN_DISABLED "WPS-AP-PIN-DISABLED "
	#define AP_STA_CONNECTED "AP-STA-CONNECTED "
	#define AP_STA_DISCONNECTED "AP-STA-DISCONNECTED "
	#define AP_STA_POSSIBLE_PSK_MISMATCH "AP-STA-POSSIBLE-PSK-MISMATCH "

	#define AP_REJECTED_MAX_STA "AP-REJECTED-MAX-STA "
	#define AP_REJECTED_BLOCKED_STA "AP-REJECTED-BLOCKED-STA "

	#define AP_EVENT_ENABLED "AP-ENABLED "
	#define AP_EVENT_DISABLED "AP-DISABLED "

	#define INTERFACE_ENABLED "INTERFACE-ENABLED "
	#define INTERFACE_DISABLED "INTERFACE-DISABLED "

	#define ACS_EVENT_STARTED "ACS-STARTED "
	#define ACS_EVENT_COMPLETED "ACS-COMPLETED "
	#define ACS_EVENT_FAILED "ACS-FAILED "

	#define DFS_EVENT_RADAR_DETECTED "DFS-RADAR-DETECTED "
	#define DFS_EVENT_NEW_CHANNEL "DFS-NEW-CHANNEL "
	#define DFS_EVENT_CAC_START "DFS-CAC-START "
	#define DFS_EVENT_CAC_COMPLETED "DFS-CAC-COMPLETED "
	#define DFS_EVENT_NOP_FINISHED "DFS-NOP-FINISHED "

	#define AP_CSA_FINISHED "AP-CSA-FINISHED "

	/* BSS Transition Management Response frame received */
	#define BSS_TM_RESP "BSS-TM-RESP "

	/* BSS command information masks */

	#define WPA_BSS_MASK_ALL 0xFFFDFFFF
	#define WPA_BSS_MASK_ID BIT(0)
	#define WPA_BSS_MASK_BSSID BIT(1)
	#define WPA_BSS_MASK_FREQ BIT(2)
	#define WPA_BSS_MASK_BEACON_INT BIT(3)
	#define WPA_BSS_MASK_CAPABILITIES BIT(4)
	#define WPA_BSS_MASK_QUAL BIT(5)
	#define WPA_BSS_MASK_NOISE BIT(6)
	#define WPA_BSS_MASK_LEVEL BIT(7)
	#define WPA_BSS_MASK_TSF BIT(8)
	#define WPA_BSS_MASK_AGE BIT(9)
	#define WPA_BSS_MASK_IE BIT(10)
	#define WPA_BSS_MASK_FLAGS BIT(11)
	#define WPA_BSS_MASK_SSID BIT(12)
	#define WPA_BSS_MASK_WPS_SCAN BIT(13)
	#define WPA_BSS_MASK_P2P_SCAN BIT(14)
	#define WPA_BSS_MASK_INTERNETW BIT(15)
	#define WPA_BSS_MASK_WIFI_DISPLAY BIT(16)
	#define WPA_BSS_MASK_DELIM BIT(17)
	#define WPA_BSS_MASK_MESH_SCAN BIT(18)
	#define WPA_BSS_MASK_SNR BIT(19)
	#define WPA_BSS_MASK_EST_THROUGHPUT BIT(20)
	#define WPA_BSS_MASK_FST BIT(21)


	/* VENDOR_ELEM_* frame id values */
	enum wpa_vendor_elem_frame {
	VENDOR_ELEM_PROBE_REQ_P2P = 0,
	VENDOR_ELEM_PROBE_RESP_P2P = 1,
	VENDOR_ELEM_PROBE_RESP_P2P_GO = 2,
	VENDOR_ELEM_BEACON_P2P_GO = 3,
	VENDOR_ELEM_P2P_PD_REQ = 4,
	VENDOR_ELEM_P2P_PD_RESP = 5,
	VENDOR_ELEM_P2P_GO_NEG_REQ = 6,
	VENDOR_ELEM_P2P_GO_NEG_RESP = 7,
	VENDOR_ELEM_P2P_GO_NEG_CONF = 8,
	VENDOR_ELEM_P2P_INV_REQ = 9,
	VENDOR_ELEM_P2P_INV_RESP = 10,
	VENDOR_ELEM_P2P_ASSOC_REQ = 11,
	VENDOR_ELEM_P2P_ASSOC_RESP = 12,
	VENDOR_ELEM_ASSOC_REQ = 13,
	NUM_VENDOR_ELEM_FRAMES
	};


	/* wpa_supplicant/hostapd control interface access */

	/**
	* wpa_ctrl_open - Open a control interface to wpa_supplicant/hostapd
	* @ctrl_path: Path for UNIX domain sockets; ignored if UDP sockets are used.
	* Returns: Pointer to abstract control interface data or %NULL on failure
	*
	* This function is used to open a control interface to wpa_supplicant/hostapd.
	* ctrl_path is usually /var/run/wpa_supplicant or /var/run/hostapd. This path
	* is configured in wpa_supplicant/hostapd and other programs using the control
	* interface need to use matching path configuration.
	*/
	struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path);

	/**
	* wpa_ctrl_open2 - Open a control interface to wpa_supplicant/hostapd
	* @ctrl_path: Path for UNIX domain sockets; ignored if UDP sockets are used.
	* @cli_path: Path for client UNIX domain sockets; ignored if UDP socket
	* is used.
	* Returns: Pointer to abstract control interface data or %NULL on failure
	*
	* This function is used to open a control interface to wpa_supplicant/hostapd
	* when the socket path for client need to be specified explicitly. Default
	* ctrl_path is usually /var/run/wpa_supplicant or /var/run/hostapd and client
	* socket path is /tmp.
	*/
	struct wpa_ctrl * wpa_ctrl_open2(const char ctrl_path, const char cli_path);


	/**
	* wpa_ctrl_close - Close a control interface to wpa_supplicant/hostapd
	* @ctrl: Control interface data from wpa_ctrl_open()
	*
	* This function is used to close a control interface.
	*/
	void wpa_ctrl_close(struct wpa_ctrl *ctrl);


	/**
	* wpa_ctrl_request - Send a command to wpa_supplicant/hostapd
	* @ctrl: Control interface data from wpa_ctrl_open()
	* @cmd: Command; usually, ASCII text, e.g., "PING"
	* @cmd_len: Length of the cmd in bytes
	* @reply: Buffer for the response
	* @reply_len: Reply buffer length
	* @msg_cb: Callback function for unsolicited messages or %NULL if not used
	* Returns: 0 on success, -1 on error (send or receive failed), -2 on timeout
	*
	* This function is used to send commands to wpa_supplicant/hostapd. Received
	* response will be written to reply and reply_len is set to the actual length
	* of the reply. This function will block for up to two seconds while waiting
	* for the reply. If unsolicited messages are received, the blocking time may
	* be longer.
	*
	* msg_cb can be used to register a callback function that will be called for
	* unsolicited messages received while waiting for the command response. These
	* messages may be received if wpa_ctrl_request() is called at the same time as
	* wpa_supplicant/hostapd is sending such a message. This can happen only if
	* the program has used wpa_ctrl_attach() to register itself as a monitor for
	* event messages. Alternatively to msg_cb, programs can register two control
	* interface connections and use one of them for commands and the other one for
	* receiving event messages, in other words, call wpa_ctrl_attach() only for
	* the control interface connection that will be used for event messages.
	*/
	int wpa_ctrl_request(struct wpa_ctrl ctrl, const char cmd, size_t cmd_len,
	char reply, size_t reply_len,
	void (msg_cb)(char msg, size_t len));


	/**
	* wpa_ctrl_attach - Register as an event monitor for the control interface
	* @ctrl: Control interface data from wpa_ctrl_open()
	* Returns: 0 on success, -1 on failure, -2 on timeout
	*
	* This function registers the control interface connection as a monitor for
	* wpa_supplicant/hostapd events. After a success wpa_ctrl_attach() call, the
	* control interface connection starts receiving event messages that can be
	* read with wpa_ctrl_recv().
	*/
	int wpa_ctrl_attach(struct wpa_ctrl *ctrl);


	/**
	* wpa_ctrl_detach - Unregister event monitor from the control interface
	* @ctrl: Control interface data from wpa_ctrl_open()
	* Returns: 0 on success, -1 on failure, -2 on timeout
	*
	* This function unregisters the control interface connection as a monitor for
	* wpa_supplicant/hostapd events, i.e., cancels the registration done with
	* wpa_ctrl_attach().
	*/
	int wpa_ctrl_detach(struct wpa_ctrl *ctrl);


	/**
	* wpa_ctrl_recv - Receive a pending control interface message
	* @ctrl: Control interface data from wpa_ctrl_open()
	* @reply: Buffer for the message data
	* @reply_len: Length of the reply buffer
	* Returns: 0 on success, -1 on failure
	*
	* This function will receive a pending control interface message. The received
	* response will be written to reply and reply_len is set to the actual length
	* of the reply.

	* wpa_ctrl_recv() is only used for event messages, i.e., wpa_ctrl_attach()
	* must have been used to register the control interface as an event monitor.
	*/
	int wpa_ctrl_recv(struct wpa_ctrl ctrl, char reply, size_t *reply_len);


	/**
	* wpa_ctrl_pending - Check whether there are pending event messages
	* @ctrl: Control interface data from wpa_ctrl_open()
	* Returns: 1 if there are pending messages, 0 if no, or -1 on error
	*
	* This function will check whether there are any pending control interface
	* message available to be received with wpa_ctrl_recv(). wpa_ctrl_pending() is
	* only used for event messages, i.e., wpa_ctrl_attach() must have been used to
	* register the control interface as an event monitor.
	*/
	int wpa_ctrl_pending(struct wpa_ctrl *ctrl);


	/**
	* wpa_ctrl_get_fd - Get file descriptor used by the control interface
	* @ctrl: Control interface data from wpa_ctrl_open()
	* Returns: File descriptor used for the connection
	*
	* This function can be used to get the file descriptor that is used for the
	* control interface connection. The returned value can be used, e.g., with
	* select() while waiting for multiple events.
	*
	* The returned file descriptor must not be used directly for sending or
	* receiving packets; instead, the library functions wpa_ctrl_request() and
	* wpa_ctrl_recv() must be used for this.
	*/
	int wpa_ctrl_get_fd(struct wpa_ctrl *ctrl);

	#ifdef ANDROID
	/**
	* wpa_ctrl_cleanup() - Delete any local UNIX domain socket files that
	* may be left over from clients that were previously connected to
	* wpa_supplicant. This keeps these files from being orphaned in the
	* event of crashes that prevented them from being removed as part
	* of the normal orderly shutdown.
	*/
	void wpa_ctrl_cleanup(void);
	#endif /* ANDROID */

	#ifdef CONFIG_CTRL_IFACE_UDP
	/* Port range for multiple wpa_supplicant instances and multiple VIFs */
	#define WPA_CTRL_IFACE_PORT 9877
	#define WPA_CTRL_IFACE_PORT_LIMIT 50 /* decremented from start */
	#define WPA_GLOBAL_CTRL_IFACE_PORT 9878
	#define WPA_GLOBAL_CTRL_IFACE_PORT_LIMIT 20 /* incremented from start */

	char * wpa_ctrl_get_remote_ifname(struct wpa_ctrl *ctrl);
	#endif /* CONFIG_CTRL_IFACE_UDP */


	#ifdef __cplusplus
	}
	#endif

	#endif /* WPA_CTRL_H */