2 * wpa_supplicant/hostapd control interface library
3 * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
22 /* wpa_supplicant control interface - fixed message prefixes */
24 /** Interactive request for identity/password/pin */
25 #define WPA_CTRL_REQ "CTRL-REQ-"
27 /** Response to identity/password/pin request */
28 #define WPA_CTRL_RSP "CTRL-RSP-"
30 /* Event messages with fixed prefix */
31 /** Authentication completed successfully and data connection enabled */
32 #define WPA_EVENT_CONNECTED "CTRL-EVENT-CONNECTED "
33 /** Disconnected, data connection is not available */
34 #define WPA_EVENT_DISCONNECTED "CTRL-EVENT-DISCONNECTED "
35 /** wpa_supplicant is exiting */
36 #define WPA_EVENT_TERMINATING "CTRL-EVENT-TERMINATING "
37 /** Password change was completed successfully */
38 #define WPA_EVENT_PASSWORD_CHANGED "CTRL-EVENT-PASSWORD-CHANGED "
39 /** EAP-Request/Notification received */
40 #define WPA_EVENT_EAP_NOTIFICATION "CTRL-EVENT-EAP-NOTIFICATION "
41 /** EAP authentication started (EAP-Request/Identity received) */
42 #define WPA_EVENT_EAP_STARTED "CTRL-EVENT-EAP-STARTED "
43 /** EAP method selected */
44 #define WPA_EVENT_EAP_METHOD "CTRL-EVENT-EAP-METHOD "
45 /** EAP authentication completed successfully */
46 #define WPA_EVENT_EAP_SUCCESS "CTRL-EVENT-EAP-SUCCESS "
47 /** EAP authentication failed (EAP-Failure received) */
48 #define WPA_EVENT_EAP_FAILURE "CTRL-EVENT-EAP-FAILURE "
49 /** New scan results available */
50 #define WPA_EVENT_SCAN_RESULTS "CTRL-EVENT-SCAN-RESULTS "
52 /** WPS overlap detected in PBC mode */
53 #define WPS_EVENT_OVERLAP "WPS-OVERLAP-DETECTED "
54 /** Available WPS AP with active PBC found in scan results */
55 #define WPS_EVENT_AP_AVAILABLE_PBC "WPS-AP-AVAILABLE-PBC "
56 /** Available WPS AP with recently selected PIN registrar found in scan results
58 #define WPS_EVENT_AP_AVAILABLE_PIN "WPS-AP-AVAILABLE-PIN "
59 /** Available WPS AP found in scan results */
60 #define WPS_EVENT_AP_AVAILABLE "WPS-AP-AVAILABLE "
61 /** A new credential received */
62 #define WPS_EVENT_CRED_RECEIVED "WPS-CRED-RECEIVED "
64 /* hostapd control interface - fixed message prefixes */
65 #define WPS_EVENT_PIN_NEEDED "WPS-PIN-NEEDED "
66 #define WPS_EVENT_NEW_AP_SETTINGS "WPS-NEW-AP-SETTINGS "
69 /* wpa_supplicant/hostapd control interface access */
72 * wpa_ctrl_open - Open a control interface to wpa_supplicant/hostapd
73 * @ctrl_path: Path for UNIX domain sockets; ignored if UDP sockets are used.
74 * Returns: Pointer to abstract control interface data or %NULL on failure
76 * This function is used to open a control interface to wpa_supplicant/hostapd.
77 * ctrl_path is usually /var/run/wpa_supplicant or /var/run/hostapd. This path
78 * is configured in wpa_supplicant/hostapd and other programs using the control
79 * interface need to use matching path configuration.
81 struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path);
85 * wpa_ctrl_close - Close a control interface to wpa_supplicant/hostapd
86 * @ctrl: Control interface data from wpa_ctrl_open()
88 * This function is used to close a control interface.
90 void wpa_ctrl_close(struct wpa_ctrl *ctrl);
94 * wpa_ctrl_request - Send a command to wpa_supplicant/hostapd
95 * @ctrl: Control interface data from wpa_ctrl_open()
96 * @cmd: Command; usually, ASCII text, e.g., "PING"
97 * @cmd_len: Length of the cmd in bytes
98 * @reply: Buffer for the response
99 * @reply_len: Reply buffer length
100 * @msg_cb: Callback function for unsolicited messages or %NULL if not used
101 * Returns: 0 on success, -1 on error (send or receive failed), -2 on timeout
103 * This function is used to send commands to wpa_supplicant/hostapd. Received
104 * response will be written to reply and reply_len is set to the actual length
105 * of the reply. This function will block for up to two seconds while waiting
106 * for the reply. If unsolicited messages are received, the blocking time may
109 * msg_cb can be used to register a callback function that will be called for
110 * unsolicited messages received while waiting for the command response. These
111 * messages may be received if wpa_ctrl_request() is called at the same time as
112 * wpa_supplicant/hostapd is sending such a message. This can happen only if
113 * the program has used wpa_ctrl_attach() to register itself as a monitor for
114 * event messages. Alternatively to msg_cb, programs can register two control
115 * interface connections and use one of them for commands and the other one for
116 * receiving event messages, in other words, call wpa_ctrl_attach() only for
117 * the control interface connection that will be used for event messages.
119 int wpa_ctrl_request(struct wpa_ctrl *ctrl, const char *cmd, size_t cmd_len,
120 char *reply, size_t *reply_len,
121 void (*msg_cb)(char *msg, size_t len));
125 * wpa_ctrl_attach - Register as an event monitor for the control interface
126 * @ctrl: Control interface data from wpa_ctrl_open()
127 * Returns: 0 on success, -1 on failure, -2 on timeout
129 * This function registers the control interface connection as a monitor for
130 * wpa_supplicant/hostapd events. After a success wpa_ctrl_attach() call, the
131 * control interface connection starts receiving event messages that can be
132 * read with wpa_ctrl_recv().
134 int wpa_ctrl_attach(struct wpa_ctrl *ctrl);
138 * wpa_ctrl_detach - Unregister event monitor from the control interface
139 * @ctrl: Control interface data from wpa_ctrl_open()
140 * Returns: 0 on success, -1 on failure, -2 on timeout
142 * This function unregisters the control interface connection as a monitor for
143 * wpa_supplicant/hostapd events, i.e., cancels the registration done with
146 int wpa_ctrl_detach(struct wpa_ctrl *ctrl);
150 * wpa_ctrl_recv - Receive a pending control interface message
151 * @ctrl: Control interface data from wpa_ctrl_open()
152 * @reply: Buffer for the message data
153 * @reply_len: Length of the reply buffer
154 * Returns: 0 on success, -1 on failure
156 * This function will receive a pending control interface message. This
157 * function will block if no messages are available. The received response will
158 * be written to reply and reply_len is set to the actual length of the reply.
159 * wpa_ctrl_recv() is only used for event messages, i.e., wpa_ctrl_attach()
160 * must have been used to register the control interface as an event monitor.
162 int wpa_ctrl_recv(struct wpa_ctrl *ctrl, char *reply, size_t *reply_len);
166 * wpa_ctrl_pending - Check whether there are pending event messages
167 * @ctrl: Control interface data from wpa_ctrl_open()
168 * Returns: 1 if there are pending messages, 0 if no, or -1 on error
170 * This function will check whether there are any pending control interface
171 * message available to be received with wpa_ctrl_recv(). wpa_ctrl_pending() is
172 * only used for event messages, i.e., wpa_ctrl_attach() must have been used to
173 * register the control interface as an event monitor.
175 int wpa_ctrl_pending(struct wpa_ctrl *ctrl);
179 * wpa_ctrl_get_fd - Get file descriptor used by the control interface
180 * @ctrl: Control interface data from wpa_ctrl_open()
181 * Returns: File descriptor used for the connection
183 * This function can be used to get the file descriptor that is used for the
184 * control interface connection. The returned value can be used, e.g., with
185 * select() while waiting for multiple events.
187 * The returned file descriptor must not be used directly for sending or
188 * receiving packets; instead, the library functions wpa_ctrl_request() and
189 * wpa_ctrl_recv() must be used for this.
191 int wpa_ctrl_get_fd(struct wpa_ctrl *ctrl);
193 #ifdef CONFIG_CTRL_IFACE_UDP
194 #define WPA_CTRL_IFACE_PORT 9877
195 #define WPA_GLOBAL_CTRL_IFACE_PORT 9878
196 #endif /* CONFIG_CTRL_IFACE_UDP */
203 #endif /* WPA_CTRL_H */