driver.h

WPA在Linux下实现的原代码 WPA在Linux下实现的原代码

	/**
	 * init - Initialize driver interface
	 * @ctx: context to be used when calling wpa_supplicant functions,
	 * e.g., wpa_supplicant_event()
	 * @ifname: interface name, e.g., wlan0
	 *
	 * Returns: Pointer to private data, %NULL on failure
	 *
	 * Initialize driver interface, including event processing for kernel
	 * driver events (e.g., associated, scan results, Michael MIC failure).
	 * This function can allocate a private configuration data area for
	 * @ctx, file descriptor, interface name, etc. information that may be
	 * needed in future driver operations. If this is not used, non-NULL
	 * value will need to be returned because %NULL is used to indicate
	 * failure. The returned value will be used as 'void *priv' data for
	 * all other driver_ops functions.
	 *
	 * The main event loop (eloop.c) of wpa_supplicant can be used to
	 * register callback for read sockets (eloop_register_read_sock()).
	 *
	 * See wpa_supplicant.h for more information about events and
	 * wpa_supplicant_event() function.
	 */
	void * (*init)(void *ctx, const char *ifname);

	/**
	 * deinit - Deinitialize driver interface
	 * @priv: private driver interface data from init()
	 *
	 * Shut down driver interface and processing of driver events. Free
	 * private data buffer if one was allocated in init() handler.
	 */
	void (*deinit)(void *priv);

	/**
	 * set_param - Set driver configuration parameters
	 * @priv: private driver interface data from init()
	 * @param: driver specific configuration parameters
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * Optional handler for notifying driver interface about configuration
	 * parameters (driver_param).
	 */
	int (*set_param)(void *priv, const char *param);

	/**
	 * set_countermeasures - Enable/disable TKIP countermeasures
	 * @priv: private driver interface data
	 * @enabled: 1 = countermeasures enabled, 0 = disabled
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * Configure TKIP countermeasures. When these are enabled, the driver
	 * should drop all received and queued frames that are using TKIP.
	 */
	int (*set_countermeasures)(void *priv, int enabled);

	/**
	 * set_drop_unencrypted - Enable/disable unencrypted frame filtering
	 * @priv: private driver interface data
	 * @enabled: 1 = unencrypted Tx/Rx frames will be dropped, 0 = disabled
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * Configure the driver to drop all non-EAPOL frames (both receive and
	 * transmit paths). Unencrypted EAPOL frames (ethertype 0x888e) must
	 * still be allowed for key negotiation.
	 */
	int (*set_drop_unencrypted)(void *priv, int enabled);

	/**
	 * scan - Request the driver to initiate scan
	 * @priv: private driver interface data
	 * @ssid: specific SSID to scan for (ProbeReq) or %NULL to scan for
	 *	all SSIDs (either active scan with broadcast SSID or passive
	 *	scan
	 * @ssid_len: length of the SSID
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * Once the scan results are ready, the driver should report scan
	 * results event for wpa_supplicant which will eventually request the
	 * results with wpa_driver_get_scan_results().
	 */
	int (*scan)(void *priv, const u8 *ssid, size_t ssid_len);

	/**
	 * get_scan_results - Fetch the latest scan results
	 * @priv: private driver interface data
	 * @results: pointer to buffer for scan results
	 * @max_size: maximum number of entries (buffer size)
	 *
	 * Returns: Number of scan result entries used on success, -1 on
	 * failure
	 *
	 * If scan results include more than max_size BSSes, max_size will be
	 * returned and the remaining entries will not be included in the
	 * buffer.
	 */
	int (*get_scan_results)(void *priv,
				struct wpa_scan_result *results,
				size_t max_size);

	/**
	 * deauthenticate - Request driver to deauthenticate
	 * @priv: private driver interface data
	 * @addr: peer address (BSSID of the AP)
	 * @reason_code: 16-bit reason code to be sent in the deauthentication
	 *	frame
	 *
	 * Returns: 0 on success, -1 on failure
	 */
	int (*deauthenticate)(void *priv, const u8 *addr, int reason_code);

	/**
	 * disassociate - Request driver to disassociate
	 * @priv: private driver interface data
	 * @addr: peer address (BSSID of the AP)
	 * @reason_code: 16-bit reason code to be sent in the disassociation
	 *	frame
	 *
	 * Returns: 0 on success, -1 on failure
	 */
	int (*disassociate)(void *priv, const u8 *addr, int reason_code);

	/**
	 * associate - Request driver to associate
	 * @priv: private driver interface data
	 * @params: association parameters
	 *
	 * Returns: 0 on success, -1 on failure
	 */
	int (*associate)(void *priv,
			 struct wpa_driver_associate_params *params);

	/**
	 * set_auth_alg - Set IEEE 802.11 authentication algorithm
	 * @priv: private driver interface data
	 * @auth_alg: bit field of AUTH_ALG_*
	 *
	 * If the driver supports more than one authentication algorithm at the
	 * same time, it should configure all supported algorithms. If not, one
	 * algorithm needs to be selected arbitrarily. Open System
	 * authentication should be ok for most cases and it is recommended to
	 * be used if other options are not supported. Static WEP configuration
	 * may also use Shared Key authentication and LEAP requires its own
	 * algorithm number. For LEAP, user can make sure that only one
	 * algorithm is used at a time by configuring LEAP as the only
	 * supported EAP method. This information is also available in
	 * associate() params, so set_auth_alg may not be needed in case of
	 * most drivers.
	 *
	 * Returns: 0 on success, -1 on failure
	 */
	int (*set_auth_alg)(void *priv, int auth_alg);

	/**
	 * add_pmkid - Add PMKSA cache entry to the driver
	 * @priv: private driver interface data
	 * @bssid: BSSID for the PMKSA cache entry
	 * @pmkid: PMKID for the PMKSA cache entry
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * This function is called when a new PMK is received, as a result of
	 * either normal authentication or RSN pre-authentication.
	 *
	 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
	 * associate(), add_pmkid() can be used to add new PMKSA cache entries
	 * in the driver. If the driver uses wpa_ie from wpa_supplicant, this
	 * driver_ops function does not need to be implemented. Likewise, if
	 * the driver does not support WPA, this function is not needed.
	 */
	int (*add_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);

	/**
	 * remove_pmkid - Remove PMKSA cache entry to the driver
	 * @priv: private driver interface data
	 * @bssid: BSSID for the PMKSA cache entry
	 * @pmkid: PMKID for the PMKSA cache entry
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * This function is called when the supplicant drops a PMKSA cache
	 * entry for any reason.
	 *
	 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
	 * associate(), remove_pmkid() can be used to synchronize PMKSA caches
	 * between the driver and wpa_supplicant. If the driver uses wpa_ie
	 * from wpa_supplicant, this driver_ops function does not need to be
	 * implemented. Likewise, if the driver does not support WPA, this
	 * function is not needed.
	 */
	int (*remove_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);

	/**
	 * flush_pmkid - Flush PMKSA cache
	 * @priv: private driver interface data
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * This function is called when the supplicant drops all PMKSA cache
	 * entries for any reason.
	 *
	 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
	 * associate(), remove_pmkid() can be used to synchronize PMKSA caches
	 * between the driver and wpa_supplicant. If the driver uses wpa_ie
	 * from wpa_supplicant, this driver_ops function does not need to be
	 * implemented. Likewise, if the driver does not support WPA, this
	 * function is not needed.
	 */
	int (*flush_pmkid)(void *priv);

	/**
	 * flush_pmkid - Flush PMKSA cache
	 * @priv: private driver interface data
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * Get driver/firmware/hardware capabilities.
	 */
	int (*get_capa)(void *priv, struct wpa_driver_capa *capa);

	/**
	 * poll - Poll driver for association information
	 * @priv: private driver interface data
	 *
	 * This is an option callback that can be used when the driver does not
	 * provide event mechanism for association events. This is called when
	 * receiving WPA EAPOL-Key messages that require association
	 * information. The driver interface is supposed to generate associnfo
	 * event before returning from this callback function. In addition, the
	 * driver interface should generate an association event after having
	 * sent out associnfo.
	 */
	void (*poll)(void *priv);

	/**
	 * get_ifname - Get interface name
	 * @priv: private driver interface data
	 *
	 * Returns: Pointer to the interface name. This can differ from the
	 * interface name used in init() call.
	 *
	 * This optional function can be used to allow the driver interface to
	 * replace the interface name with something else, e.g., based on an
	 * interface mapping from a more descriptive name.
	 */
	const char * (*get_ifname)(void *priv);

	/**
	 * get_mac_addr - Get own MAC address
	 * @priv: private driver interface data
	 *
	 * Returns: Pointer to own MAC address or %NULL on failure
	 *
	 * This optional function can be used to get the own MAC address of the
	 * device from the driver interface code. This is only needed if the
	 * l2_packet implementation for the OS does not provide easy access to
	 * a MAC address. */
	const u8 * (*get_mac_addr)(void *priv);

	/**
	 * send_eapol - Optional function for sending EAPOL packets
	 * @priv: private driver interface data
	 * @dest: Destination MAC address
	 * @proto: Ethertype
	 * @data: EAPOL packet starting with IEEE 802.1X header
	 * @data_len: Size of the EAPOL packet
	 *
	 * Returns: 0 on success, -1 on failure
	 *
	 * This optional function can be used to override l2_packet operations
	 * with driver specific functionality. If this function pointer is set,
	 * l2_packet module is not used at all and the driver interface code is
	 * responsible for receiving and sending all EAPOL packets. The
	 * received EAPOL packets are sent to core code by calling
	 * wpa_supplicant_rx_eapol(). The driver interface is required to
	 * implement get_mac_addr() handler if send_eapol() is used.
	 */
	int (*send_eapol)(void *priv, const u8 *dest, u16 proto,
			  const u8 *data, size_t data_len);
};

#endif /* DRIVER_H */