186 lines
7.1 KiB
C
186 lines
7.1 KiB
C
/*
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* wpa_supplicant/hostapd control interface library
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef WPA_CTRL_H
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#define WPA_CTRL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* wpa_supplicant control interface - fixed message prefixes */
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/** Interactive request for identity/password/pin */
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#define WPA_CTRL_REQ "CTRL-REQ-"
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/** Response to identity/password/pin request */
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#define WPA_CTRL_RSP "CTRL-RSP-"
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/* Event messages with fixed prefix */
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/** Authentication completed successfully and data connection enabled */
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#define WPA_EVENT_CONNECTED "CTRL-EVENT-CONNECTED "
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/** Disconnected, data connection is not available */
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#define WPA_EVENT_DISCONNECTED "CTRL-EVENT-DISCONNECTED "
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/** wpa_supplicant is exiting */
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#define WPA_EVENT_TERMINATING "CTRL-EVENT-TERMINATING "
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/** Password change was completed successfully */
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#define WPA_EVENT_PASSWORD_CHANGED "CTRL-EVENT-PASSWORD-CHANGED "
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/** EAP-Request/Notification received */
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#define WPA_EVENT_EAP_NOTIFICATION "CTRL-EVENT-EAP-NOTIFICATION "
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/** EAP authentication started (EAP-Request/Identity received) */
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#define WPA_EVENT_EAP_STARTED "CTRL-EVENT-EAP-STARTED "
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/** EAP method selected */
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#define WPA_EVENT_EAP_METHOD "CTRL-EVENT-EAP-METHOD "
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/** EAP authentication completed successfully */
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#define WPA_EVENT_EAP_SUCCESS "CTRL-EVENT-EAP-SUCCESS "
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/** EAP authentication failed (EAP-Failure received) */
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#define WPA_EVENT_EAP_FAILURE "CTRL-EVENT-EAP-FAILURE "
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/* wpa_supplicant/hostapd control interface access */
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/**
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* wpa_ctrl_open - Open a control interface to wpa_supplicant/hostapd
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* @ctrl_path: Path for UNIX domain sockets; ignored if UDP sockets are used.
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* Returns: Pointer to abstract control interface data or %NULL on failure
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*
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* This function is used to open a control interface to wpa_supplicant/hostapd.
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* ctrl_path is usually /var/run/wpa_supplicant or /var/run/hostapd. This path
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* is configured in wpa_supplicant/hostapd and other programs using the control
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* interface need to use matching path configuration.
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*/
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struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path);
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/**
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* wpa_ctrl_close - Close a control interface to wpa_supplicant/hostapd
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* @ctrl: Control interface data from wpa_ctrl_open()
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*
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* This function is used to close a control interface.
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*/
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void wpa_ctrl_close(struct wpa_ctrl *ctrl);
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/**
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* wpa_ctrl_request - Send a command to wpa_supplicant/hostapd
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* @ctrl: Control interface data from wpa_ctrl_open()
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* @cmd: Command; usually, ASCII text, e.g., "PING"
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* @cmd_len: Length of the cmd in bytes
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* @reply: Buffer for the response
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* @reply_len: Reply buffer length
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* @msg_cb: Callback function for unsolicited messages or %NULL if not used
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* Returns: 0 on success, -1 on error (send or receive failed), -2 on timeout
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*
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* This function is used to send commands to wpa_supplicant/hostapd. Received
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* response will be written to reply and reply_len is set to the actual length
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* of the reply. This function will block for up to two seconds while waiting
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* for the reply. If unsolicited messages are received, the blocking time may
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* be longer.
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*
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* msg_cb can be used to register a callback function that will be called for
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* unsolicited messages received while waiting for the command response. These
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* messages may be received if wpa_ctrl_request() is called at the same time as
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* wpa_supplicant/hostapd is sending such a message. This can happen only if
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* the program has used wpa_ctrl_attach() to register itself as a monitor for
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* event messages. Alternatively to msg_cb, programs can register two control
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* interface connections and use one of them for commands and the other one for
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* receiving event messages, in other words, call wpa_ctrl_attach() only for
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* the control interface connection that will be used for event messages.
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*/
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int wpa_ctrl_request(struct wpa_ctrl *ctrl, const char *cmd, size_t cmd_len,
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char *reply, size_t *reply_len,
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void (*msg_cb)(char *msg, size_t len));
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/**
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* wpa_ctrl_attach - Register as an event monitor for the control interface
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* @ctrl: Control interface data from wpa_ctrl_open()
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* Returns: 0 on success, -1 on failure, -2 on timeout
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*
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* This function registers the control interface connection as a monitor for
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* wpa_supplicant/hostapd events. After a success wpa_ctrl_attach() call, the
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* control interface connection starts receiving event messages that can be
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* read with wpa_ctrl_recv().
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*/
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int wpa_ctrl_attach(struct wpa_ctrl *ctrl);
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/**
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* wpa_ctrl_detach - Unregister event monitor from the control interface
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* @ctrl: Control interface data from wpa_ctrl_open()
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* Returns: 0 on success, -1 on failure, -2 on timeout
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*
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* This function unregisters the control interface connection as a monitor for
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* wpa_supplicant/hostapd events, i.e., cancels the registration done with
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* wpa_ctrl_attach().
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*/
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int wpa_ctrl_detach(struct wpa_ctrl *ctrl);
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/**
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* wpa_ctrl_recv - Receive a pending control interface message
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* @ctrl: Control interface data from wpa_ctrl_open()
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* @reply: Buffer for the message data
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* @reply_len: Length of the reply buffer
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* Returns: 0 on success, -1 on failure
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*
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* This function will receive a pending control interface message. This
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* function will block if no messages are available. The received response will
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* be written to reply and reply_len is set to the actual length of the reply.
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* wpa_ctrl_recv() is only used for event messages, i.e., wpa_ctrl_attach()
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* must have been used to register the control interface as an event monitor.
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*/
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int wpa_ctrl_recv(struct wpa_ctrl *ctrl, char *reply, size_t *reply_len);
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/**
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* wpa_ctrl_pending - Check whether there are pending event messages
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* @ctrl: Control interface data from wpa_ctrl_open()
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* Returns: 1 if there are pending messages, 0 if no, or -1 on error
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*
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* This function will check whether there are any pending control interface
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* message available to be received with wpa_ctrl_recv(). wpa_ctrl_pending() is
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* only used for event messages, i.e., wpa_ctrl_attach() must have been used to
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* register the control interface as an event monitor.
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*/
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int wpa_ctrl_pending(struct wpa_ctrl *ctrl);
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/**
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* wpa_ctrl_get_fd - Get file descriptor used by the control interface
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* @ctrl: Control interface data from wpa_ctrl_open()
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* Returns: File descriptor used for the connection
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*
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* This function can be used to get the file descriptor that is used for the
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* control interface connection. The returned value can be used, e.g., with
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* select() while waiting for multiple events.
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*
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* The returned file descriptor must not be used directly for sending or
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* receiving packets; instead, the library functions wpa_ctrl_request() and
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* wpa_ctrl_recv() must be used for this.
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*/
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int wpa_ctrl_get_fd(struct wpa_ctrl *ctrl);
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#ifdef CONFIG_CTRL_IFACE_UDP
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#define WPA_CTRL_IFACE_PORT 9877
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#define WPA_GLOBAL_CTRL_IFACE_PORT 9878
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#endif /* CONFIG_CTRL_IFACE_UDP */
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#ifdef __cplusplus
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}
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#endif
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#endif /* WPA_CTRL_H */
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