#ifndef AP_H
#define AP_H

/* STA flags */
#define WLAN_STA_AUTH BIT(0)
#define WLAN_STA_ASSOC BIT(1)
#define WLAN_STA_PS BIT(2)
#define WLAN_STA_TIM BIT(3)
#define WLAN_STA_PERM BIT(4)
#define WLAN_STA_AUTHORIZED BIT(5)
#define WLAN_STA_PENDING_POLL BIT(6) /* pending activity poll not ACKed */

#define WLAN_RATE_1M BIT(0)
#define WLAN_RATE_2M BIT(1)
#define WLAN_RATE_5M5 BIT(2)
#define WLAN_RATE_11M BIT(3)
#define WLAN_RATE_COUNT 4

/* Maximum size of Supported Rates info element. IEEE 802.11 has a limit of 8,
 * but some pre-standard IEEE 802.11g products use longer elements. */
#define WLAN_SUPP_RATES_MAX 32


struct sta_info {
	struct sta_info *next; /* next entry in sta list */
	struct sta_info *hnext; /* next entry in hash table list */
	u8 addr[6];
	u16 aid; /* STA's unique AID (1 .. 2007) or 0 if not yet assigned */
	u32 flags;
	u16 capability;
	u16 listen_interval; /* or beacon_int for APs */
	u8 supported_rates[WLAN_SUPP_RATES_MAX];
	u8 tx_supp_rates;

	enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next;

	/* IEEE 802.1X related data */
	struct eapol_state_machine *eapol_sm;
	int radius_identifier;
	/* TODO: check when the last messages can be released */
	struct radius_msg *last_recv_radius;
	u8 *last_eap_supp; /* last received EAP Response from Supplicant */
	size_t last_eap_supp_len;
	u8 *last_eap_radius; /* last received EAP Response from Authentication
			      * Server */
	size_t last_eap_radius_len;
	u8 *identity;
	size_t identity_len;

	/* Keys for encrypting and signing EAPOL-Key frames */
	u8 *eapol_key_sign;
	size_t eapol_key_sign_len;
	u8 *eapol_key_crypt;
	size_t eapol_key_crypt_len;

	/* IEEE 802.11f (IAPP) related data */
	struct ieee80211_mgmt *last_assoc_req;

	u32 acct_session_id_lo;
	time_t acct_session_start;
	int acct_terminate_cause; /* Acct-Terminate-Cause */
	int acct_interim_interval; /* Acct-Interim-Interval */

	u8 *challenge; /* IEEE 802.11 Shared Key Authentication Challenge */
};


#define MAX_STA_COUNT 1024

/* Maximum number of AIDs to use for STAs; must be 2007 or lower
 * (8802.11 limitation) */
#define MAX_AID_TABLE_SIZE 128

#define STA_HASH_SIZE 256
#define STA_HASH(sta) (sta[5])


/* Default value for maximum station inactivity. After AP_MAX_INACTIVITY has
 * passed since last received frame from the station, a nullfunc data frame is
 * sent to the station. If this frame is not acknowledged and no other frames
 * have been received, the station will be disassociated after
 * AP_DISASSOC_DELAY. Similarily, a the station will be deauthenticated after
 * AP_DEAUTH_DELAY. AP_TIMEOUT_RESOLUTION is the resolution that is used with
 * max inactivity timer. All these times are in seconds. */
#define AP_MAX_INACTIVITY (5 * 60)
#define AP_DISASSOC_DELAY (1)
#define AP_DEAUTH_DELAY (1)

#endif /* AP_H */
