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/*
 * wpa_supplicant - Internal definitions
 * Copyright (c) 2003-2005, Jouni Malinen <jkmaline@cc.hut.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#ifndef WPA_SUPPLICANT_I_H
#define WPA_SUPPLICANT_I_H

#include "driver.h"

struct wpa_blacklist {
	struct wpa_blacklist *next;
	u8 bssid[ETH_ALEN];
	int count;
};


typedef enum {
	WPA_DISCONNECTED, WPA_SCANNING, WPA_ASSOCIATING,
	WPA_ASSOCIATED, WPA_4WAY_HANDSHAKE, WPA_GROUP_HANDSHAKE,
	WPA_COMPLETED
} wpa_states;


struct wpa_scan_result;
struct wpa_sm;

/**
 * struct wpa_supplicant - Internal data for wpa_supplicant
 *
 * This structure contains the internal data for core wpa_supplicant code. This
 * should be only used directly from the core code. However, a pointer to this
 * data is used from other files as an arbitrary context pointer in calls to
 * core functions.
 */
struct wpa_supplicant {
	struct wpa_supplicant *head;
	struct wpa_supplicant *next;
	struct l2_packet_data *l2;
	unsigned char own_addr[ETH_ALEN];
	char ifname[100];

	char *confname;
	struct wpa_config *conf;
	int countermeasures;
	time_t last_michael_mic_error;
	u8 bssid[ETH_ALEN];
	int reassociate; /* reassociation requested */
	int disconnected; /* all connections disabled; i.e., do no reassociate
			   * before this has been cleared */
	struct wpa_ssid *current_ssid;
	u8 *ap_wpa_ie, *ap_rsn_ie;
	size_t ap_wpa_ie_len, ap_rsn_ie_len;
	u8 *assoc_wpa_ie;
	size_t assoc_wpa_ie_len;

	/* Selected configuration (based on Beacon/ProbeResp WPA IE) */
	int pairwise_cipher;
	int group_cipher;
	int key_mgmt;

	void *drv_priv; /* private data used by driver_ops */

	struct wpa_ssid *prev_scan_ssid; /* previously scanned SSID;
					  * NULL = not yet initialized (start
					  * with broadcast SSID)
					  * BROADCAST_SSID_SCAN = broadcast
					  * SSID was used in the previous scan
					  */
#define BROADCAST_SSID_SCAN ((struct wpa_ssid *) 1)

	struct wpa_scan_result *scan_results;
	int num_scan_results;

	struct wpa_driver_ops *driver;
	int interface_removed; /* whether the network interface has been
				* removed */
	struct wpa_sm *wpa;
	struct eapol_sm *eapol;

	int ctrl_sock; /* UNIX domain socket for control interface or -1 if
			* not used */
	struct wpa_ctrl_dst *ctrl_dst;

	wpa_states wpa_state;
	int new_connection;
	int reassociated_connection;

	int eapol_received; /* number of EAPOL packets received after the
			     * previous association event */

	struct scard_data *scard;

	unsigned char last_eapol_src[ETH_ALEN];

	int keys_cleared;

	struct wpa_blacklist *blacklist;

	unsigned int dot11RSNA4WayHandshakeFailures;
};


/* wpa_supplicant.c */
void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx);

void wpa_supplicant_req_scan(struct wpa_supplicant *wpa_s, int sec, int usec);

void wpa_supplicant_cancel_scan(struct wpa_supplicant *wpa_s);

void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
				 int reason_code);
void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
				   int reason_code);

void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s);

int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s);

int wpa_supplicant_get_beacon_ie(struct wpa_supplicant *wpa_s);

struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s);

const char * wpa_supplicant_state_txt(int state);
void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, wpa_states state);
int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s,
			       int wait_for_interface);
struct wpa_blacklist * wpa_blacklist_get(struct wpa_supplicant *wpa_s,
					 const u8 *bssid);
int wpa_blacklist_add(struct wpa_supplicant *wpa_s, const u8 *bssid);
int wpa_blacklist_del(struct wpa_supplicant *wpa_s, const u8 *bssid);
void wpa_blacklist_clear(struct wpa_supplicant *wpa_s);
int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
			      struct wpa_scan_result *bss,
			      struct wpa_ssid *ssid,
			      u8 *wpa_ie, int *wpa_ie_len);
void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
			      struct wpa_scan_result *bss,
			      struct wpa_ssid *ssid);
void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
				       struct wpa_ssid *ssid);
void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s);
int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s);
void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr);
void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
				     int sec, int usec);


struct wpa_ie_data {
	int proto;
	int pairwise_cipher;
	int group_cipher;
	int key_mgmt;
	int capabilities;
	int num_pmkid;
	const u8 *pmkid;
};

int wpa_parse_wpa_ie(struct wpa_supplicant *wpa_s, const u8 *wpa_ie,
		     size_t wpa_ie_len, struct wpa_ie_data *data);

int wpa_gen_wpa_ie(struct wpa_supplicant *wpa_s, u8 *wpa_ie,
		   size_t wpa_ie_len);

int wpa_sm_rx_eapol(struct wpa_supplicant *wpa_s, unsigned char *src_addr,
		    unsigned char *buf, size_t len);

int wpa_get_mib(struct wpa_supplicant *wpa_s, char *buf, size_t buflen);

u8 * wpa_alloc_eapol(const struct wpa_supplicant *wpa_s, const u8 *dest,
		     u16 proto, u8 type, const void *data, u16 data_len,
		     size_t *msg_len, void **data_pos);

/**
 * wpa_eapol_send - send IEEE 802.1X EAPOL packet to the Authenticator
 * @ctx: pointer to wpa_supplicant data
 * @type: IEEE 802.1X packet type (IEEE802_1X_TYPE_*)
 * @buf: EAPOL payload (after IEEE 802.1X header)
 * @len: EAPOL payload length
 *
 * This function adds Ethernet and IEEE 802.1X header and sends the EAPOL frame
 * to the current Authenticator or in case of pre-authentication, to the peer
 * of the authentication.
 */
int wpa_eapol_send(void *ctx, int type, u8 *buf, size_t len);


/* driver_ops */
static inline void * wpa_drv_init(struct wpa_supplicant *wpa_s,
				  const char *ifname)
{
	if (wpa_s->driver->init) {
		return wpa_s->driver->init(wpa_s, ifname);
	}
	return NULL;
}

static inline void wpa_drv_deinit(struct wpa_supplicant *wpa_s)
{
	if (wpa_s->driver->deinit)
		wpa_s->driver->deinit(wpa_s->drv_priv);
}

static inline int wpa_drv_set_param(struct wpa_supplicant *wpa_s,
				    const char *param)
{
	if (wpa_s->driver->set_param)
		return wpa_s->driver->set_param(wpa_s->drv_priv, param);
	return 0;
}

static inline int wpa_drv_set_drop_unencrypted(struct wpa_supplicant *wpa_s,
					       int enabled)
{
	if (wpa_s->driver->set_drop_unencrypted) {
		return wpa_s->driver->set_drop_unencrypted(wpa_s->drv_priv,
							   enabled);
	}
	return -1;
}

static inline int wpa_drv_set_countermeasures(struct wpa_supplicant *wpa_s,
					      int enabled)
{
	if (wpa_s->driver->set_countermeasures) {
		return wpa_s->driver->set_countermeasures(wpa_s->drv_priv,
							  enabled);
	}
	return -1;
}

static inline int wpa_drv_set_auth_alg(struct wpa_supplicant *wpa_s,
				       int auth_alg)
{
	if (wpa_s->driver->set_auth_alg) {
		return wpa_s->driver->set_auth_alg(wpa_s->drv_priv,
						   auth_alg);
	}
	return -1;
}

static inline int wpa_drv_set_wpa(struct wpa_supplicant *wpa_s, int enabled)
{
	if (wpa_s->driver->set_wpa) {
		return wpa_s->driver->set_wpa(wpa_s->drv_priv, enabled);
	}
	return 0;
}

static inline int wpa_drv_associate(struct wpa_supplicant *wpa_s,
				    struct wpa_driver_associate_params *params)
{
	if (wpa_s->driver->associate) {
		return wpa_s->driver->associate(wpa_s->drv_priv, params);
	}
	return -1;
}

static inline int wpa_drv_scan(struct wpa_supplicant *wpa_s, const u8 *ssid,
			       size_t ssid_len)
{
	if (wpa_s->driver->scan) {
		return wpa_s->driver->scan(wpa_s->drv_priv, ssid, ssid_len);
	}
	return -1;
}

static inline int wpa_drv_get_scan_results(struct wpa_supplicant *wpa_s,
					   struct wpa_scan_result *results,
					   size_t max_size)
{
	if (wpa_s->driver->get_scan_results) {
		return wpa_s->driver->get_scan_results(wpa_s->drv_priv,
						       results, max_size);
	}
	return -1;
}

static inline int wpa_drv_get_bssid(struct wpa_supplicant *wpa_s, u8 *bssid)
{
	if (wpa_s->driver->get_bssid) {
		return wpa_s->driver->get_bssid(wpa_s->drv_priv, bssid);
	}
	return -1;
}

static inline int wpa_drv_get_ssid(struct wpa_supplicant *wpa_s, u8 *ssid)
{
	if (wpa_s->driver->get_ssid) {
		return wpa_s->driver->get_ssid(wpa_s->drv_priv, ssid);
	}
	return -1;
}

static inline int wpa_drv_set_key(struct wpa_supplicant *wpa_s, wpa_alg alg,
				   const u8 *addr, int key_idx, int set_tx,
				   const u8 *seq, size_t seq_len,
				   const u8 *key, size_t key_len)
{
	if (wpa_s->driver->set_key) {
		return wpa_s->driver->set_key(wpa_s->drv_priv, alg, addr,
					      key_idx, set_tx, seq, seq_len,
					      key, key_len);
	}
	return -1;
}

static inline int wpa_drv_deauthenticate(struct wpa_supplicant *wpa_s,
					 const u8 *addr, int reason_code)
{
	if (wpa_s->driver->deauthenticate) {
		return wpa_s->driver->deauthenticate(wpa_s->drv_priv, addr,
						     reason_code);
	}
	return -1;
}

static inline int wpa_drv_disassociate(struct wpa_supplicant *wpa_s,
				       const u8 *addr, int reason_code)
{
	if (wpa_s->driver->disassociate) {
		return wpa_s->driver->disassociate(wpa_s->drv_priv, addr,
						   reason_code);
	}
	return -1;
}

static inline int wpa_drv_add_pmkid(struct wpa_supplicant *wpa_s,
				    const u8 *bssid, const u8 *pmkid)
{
	if (wpa_s->driver->add_pmkid) {
		return wpa_s->driver->add_pmkid(wpa_s->drv_priv, bssid, pmkid);
	}
	return -1;
}

static inline int wpa_drv_remove_pmkid(struct wpa_supplicant *wpa_s,
				       const u8 *bssid, const u8 *pmkid)
{
	if (wpa_s->driver->remove_pmkid) {
		return wpa_s->driver->remove_pmkid(wpa_s->drv_priv, bssid,
						   pmkid);
	}
	return -1;
}

static inline int wpa_drv_flush_pmkid(struct wpa_supplicant *wpa_s)
{
	if (wpa_s->driver->flush_pmkid) {
		return wpa_s->driver->flush_pmkid(wpa_s->drv_priv);
	}
	return -1;
}

static inline int wpa_drv_get_capa(struct wpa_supplicant *wpa_s,
				   struct wpa_driver_capa *capa)
{
	if (wpa_s->driver->get_capa) {
		return wpa_s->driver->get_capa(wpa_s->drv_priv, capa);
	}
	return -1;
}

static inline void wpa_drv_poll(struct wpa_supplicant *wpa_s)
{
	if (wpa_s->driver->poll) {
		wpa_s->driver->poll(wpa_s->drv_priv);
	}
}

static inline const char * wpa_drv_get_ifname(struct wpa_supplicant *wpa_s)
{
	if (wpa_s->driver->get_ifname) {
		return wpa_s->driver->get_ifname(wpa_s->drv_priv);
	}
	return NULL;
}

static inline const u8 * wpa_drv_get_mac_addr(struct wpa_supplicant *wpa_s)
{
	if (wpa_s->driver->get_mac_addr) {
		return wpa_s->driver->get_mac_addr(wpa_s->drv_priv);
	}
	return NULL;
}

static inline int wpa_drv_send_eapol(struct wpa_supplicant *wpa_s,
				     const u8 *data, size_t data_len)
{
	if (wpa_s->driver->send_eapol)
		return wpa_s->driver->send_eapol(wpa_s->drv_priv, data,
						 data_len);
	return -1;
}

#endif /* WPA_SUPPLICANT_I_H */