drivers/net/wireless/hostap/hostap_ap.h - maze/linux - Git at Google

 #ifndef HOSTAP_AP_H
 #define HOSTAP_AP_H

 /* AP data structures for STAs */

 /* maximum number of frames to buffer per STA */
 #define STA_MAX_TX_BUFFER 32

 /* 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) /* TIM bit is on for PS stations */
 #define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
 #define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
 				    * controlling whether STA is authorized to
 				    * send and receive non-IEEE 802.1X frames
 				    */
 #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

 /* Try to increase TX rate after # successfully sent consecutive packets */
 #define WLAN_RATE_UPDATE_COUNT 50

 /* Decrease TX rate after # consecutive dropped packets */
 #define WLAN_RATE_DECREASE_THRESHOLD 2

 struct sta_info {
 	struct list_head list;
 	struct sta_info *hnext; /* next entry in hash table list */
 	atomic_t users; /* number of users (do not remove if > 0) */
 	struct proc_dir_entry *proc;

 	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];

 	unsigned long last_auth;
 	unsigned long last_assoc;
 	unsigned long last_rx;
 	unsigned long last_tx;
 	unsigned long rx_packets, tx_packets;
 	unsigned long rx_bytes, tx_bytes;
 	struct sk_buff_head tx_buf;
 	/* FIX: timeout buffers with an expiry time somehow derived from
 	 * listen_interval */

 	s8 last_rx_silence; /* Noise in dBm */
 	s8 last_rx_signal; /* Signal strength in dBm */
 	u8 last_rx_rate; /* TX rate in 0.1 Mbps */
 	u8 last_rx_updated; /* IWSPY's struct iw_quality::updated */

 	u8 tx_supp_rates; /* bit field of supported TX rates */
 	u8 tx_rate; /* current TX rate (in 0.1 Mbps) */
 	u8 tx_rate_idx; /* current TX rate (WLAN_RATE_*) */
 	u8 tx_max_rate; /* max TX rate (WLAN_RATE_*) */
 	u32 tx_count[WLAN_RATE_COUNT]; /* number of frames sent (per rate) */
 	u32 rx_count[WLAN_RATE_COUNT]; /* number of frames received (per rate)
 					*/
 	u32 tx_since_last_failure;
 	u32 tx_consecutive_exc;

 	struct ieee80211_crypt_data *crypt;

 	int ap; /* whether this station is an AP */

 	local_info_t *local;

 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 	union {
 		struct {
 			char *challenge; /* shared key authentication
 					  * challenge */
 		} sta;
 		struct {
 			int ssid_len;
 			unsigned char ssid[MAX_SSID_LEN + 1]; /* AP's ssid */
 			int channel;
 			unsigned long last_beacon; /* last RX beacon time */
 		} ap;
 	} u;

 	struct timer_list timer;
 	enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next;
 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 };


 #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_SEC
  * 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. */
 #define AP_MAX_INACTIVITY_SEC (5 * 60)
 #define AP_DISASSOC_DELAY (HZ)
 #define AP_DEAUTH_DELAY (HZ)

 /* ap_policy: whether to accept frames to/from other APs/IBSS */
 typedef enum {
 	AP_OTHER_AP_SKIP_ALL = 0,
 	AP_OTHER_AP_SAME_SSID = 1,
 	AP_OTHER_AP_ALL = 2,
 	AP_OTHER_AP_EVEN_IBSS = 3
 } ap_policy_enum;

 #define PRISM2_AUTH_OPEN BIT(0)
 #define PRISM2_AUTH_SHARED_KEY BIT(1)


 /* MAC address-based restrictions */
 struct mac_entry {
 	struct list_head list;
 	u8 addr[6];
 };

 struct mac_restrictions {
 	enum { MAC_POLICY_OPEN = 0, MAC_POLICY_ALLOW, MAC_POLICY_DENY } policy;
 	unsigned int entries;
 	struct list_head mac_list;
 	spinlock_t lock;
 };


 struct add_sta_proc_data {
 	u8 addr[ETH_ALEN];
 	struct add_sta_proc_data *next;
 };


 typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
 struct wds_oper_data {
 	wds_oper_type type;
 	u8 addr[ETH_ALEN];
 	struct wds_oper_data *next;
 };


 struct ap_data {
 	int initialized; /* whether ap_data has been initialized */
 	local_info_t *local;
 	int bridge_packets; /* send packet to associated STAs directly to the
 			     * wireless media instead of higher layers in the
 			     * kernel */
 	unsigned int bridged_unicast; /* number of unicast frames bridged on
 				       * wireless media */
 	unsigned int bridged_multicast; /* number of non-unicast frames
 					 * bridged on wireless media */
 	unsigned int tx_drop_nonassoc; /* number of unicast TX packets dropped
 					* because they were to an address that
 					* was not associated */
 	int nullfunc_ack; /* use workaround for nullfunc frame ACKs */

 	spinlock_t sta_table_lock;
 	int num_sta; /* number of entries in sta_list */
 	struct list_head sta_list; /* STA info list head */
 	struct sta_info *sta_hash[STA_HASH_SIZE];

 	struct proc_dir_entry *proc;

 	ap_policy_enum ap_policy;
 	unsigned int max_inactivity;
 	int autom_ap_wds;

 	struct mac_restrictions mac_restrictions; /* MAC-based auth */
 	int last_tx_rate;

 	struct work_struct add_sta_proc_queue;
 	struct add_sta_proc_data *add_sta_proc_entries;

 	struct work_struct wds_oper_queue;
 	struct wds_oper_data *wds_oper_entries;

 	u16 tx_callback_idx;

 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 	/* pointers to STA info; based on allocated AID or NULL if AID free
 	 * AID is in the range 1-2007, so sta_aid[0] corresponders to AID 1
 	 * and so on
 	 */
 	struct sta_info *sta_aid[MAX_AID_TABLE_SIZE];

 	u16 tx_callback_auth, tx_callback_assoc, tx_callback_poll;

 	/* WEP operations for generating challenges to be used with shared key
 	 * authentication */
 	struct ieee80211_crypto_ops *crypt;
 	void *crypt_priv;
 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 };


 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
 	       struct hostap_80211_rx_status *rx_stats);
 void hostap_init_data(local_info_t *local);
 void hostap_init_ap_proc(local_info_t *local);
 void hostap_free_data(struct ap_data *ap);
 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver);

 typedef enum {
 	AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED,
 	AP_TX_CONTINUE_NOT_AUTHORIZED
 } ap_tx_ret;
 struct hostap_tx_data {
 	struct sk_buff *skb;
 	int host_encrypt;
 	struct ieee80211_crypt_data *crypt;
 	void *sta_ptr;
 };
 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx);
 void hostap_handle_sta_release(void *ptr);
 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb);
 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr);
 typedef enum {
 	AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED
 } ap_rx_ret;
 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
 			       struct sk_buff *skb,
 			       struct hostap_80211_rx_status *rx_stats,
 			       int wds);
 int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr_4addr *hdr,
 			     struct ieee80211_crypt_data **crypt,
 			     void **sta_ptr);
 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr);
 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr);
 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr);
 int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr_4addr *hdr,
 			   struct hostap_80211_rx_status *rx_stats);
 void hostap_update_rates(local_info_t *local);
 void hostap_add_wds_links(local_info_t *local);
 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type);

 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
 			    int resend);
 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */

 #endif /* HOSTAP_AP_H */
	#ifndef HOSTAP_AP_H
	#define HOSTAP_AP_H

	/* AP data structures for STAs */

	/* maximum number of frames to buffer per STA */
	#define STA_MAX_TX_BUFFER 32

	/* 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) /* TIM bit is on for PS stations */
	#define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
	#define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
	* controlling whether STA is authorized to
	* send and receive non-IEEE 802.1X frames
	*/
	#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

	/* Try to increase TX rate after # successfully sent consecutive packets */
	#define WLAN_RATE_UPDATE_COUNT 50

	/* Decrease TX rate after # consecutive dropped packets */
	#define WLAN_RATE_DECREASE_THRESHOLD 2

	struct sta_info {
	struct list_head list;
	struct sta_info hnext; / next entry in hash table list */
	atomic_t users; /* number of users (do not remove if > 0) */
	struct proc_dir_entry *proc;

	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];

	unsigned long last_auth;
	unsigned long last_assoc;
	unsigned long last_rx;
	unsigned long last_tx;
	unsigned long rx_packets, tx_packets;
	unsigned long rx_bytes, tx_bytes;
	struct sk_buff_head tx_buf;
	/* FIX: timeout buffers with an expiry time somehow derived from
	* listen_interval */

	s8 last_rx_silence; /* Noise in dBm */
	s8 last_rx_signal; /* Signal strength in dBm */
	u8 last_rx_rate; /* TX rate in 0.1 Mbps */
	u8 last_rx_updated; /* IWSPY's struct iw_quality::updated */

	u8 tx_supp_rates; /* bit field of supported TX rates */
	u8 tx_rate; /* current TX rate (in 0.1 Mbps) */
	u8 tx_rate_idx; /* current TX rate (WLAN_RATE_) /
	u8 tx_max_rate; /* max TX rate (WLAN_RATE_) /
	u32 tx_count[WLAN_RATE_COUNT]; /* number of frames sent (per rate) */
	u32 rx_count[WLAN_RATE_COUNT]; /* number of frames received (per rate)
	*/
	u32 tx_since_last_failure;
	u32 tx_consecutive_exc;

	struct ieee80211_crypt_data *crypt;

	int ap; /* whether this station is an AP */

	local_info_t *local;

	#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
	union {
	struct {
	char challenge; / shared key authentication
	* challenge */
	} sta;
	struct {
	int ssid_len;
	unsigned char ssid[MAX_SSID_LEN + 1]; /* AP's ssid */
	int channel;
	unsigned long last_beacon; /* last RX beacon time */
	} ap;
	} u;

	struct timer_list timer;
	enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next;
	#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
	};


	#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_SEC
	* 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. */
	#define AP_MAX_INACTIVITY_SEC (5 * 60)
	#define AP_DISASSOC_DELAY (HZ)
	#define AP_DEAUTH_DELAY (HZ)

	/* ap_policy: whether to accept frames to/from other APs/IBSS */
	typedef enum {
	AP_OTHER_AP_SKIP_ALL = 0,
	AP_OTHER_AP_SAME_SSID = 1,
	AP_OTHER_AP_ALL = 2,
	AP_OTHER_AP_EVEN_IBSS = 3
	} ap_policy_enum;

	#define PRISM2_AUTH_OPEN BIT(0)
	#define PRISM2_AUTH_SHARED_KEY BIT(1)


	/* MAC address-based restrictions */
	struct mac_entry {
	struct list_head list;
	u8 addr[6];
	};

	struct mac_restrictions {
	enum { MAC_POLICY_OPEN = 0, MAC_POLICY_ALLOW, MAC_POLICY_DENY } policy;
	unsigned int entries;
	struct list_head mac_list;
	spinlock_t lock;
	};


	struct add_sta_proc_data {
	u8 addr[ETH_ALEN];
	struct add_sta_proc_data *next;
	};


	typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
	struct wds_oper_data {
	wds_oper_type type;
	u8 addr[ETH_ALEN];
	struct wds_oper_data *next;
	};


	struct ap_data {
	int initialized; /* whether ap_data has been initialized */
	local_info_t *local;
	int bridge_packets; /* send packet to associated STAs directly to the
	* wireless media instead of higher layers in the
	* kernel */
	unsigned int bridged_unicast; /* number of unicast frames bridged on
	* wireless media */
	unsigned int bridged_multicast; /* number of non-unicast frames
	* bridged on wireless media */
	unsigned int tx_drop_nonassoc; /* number of unicast TX packets dropped
	* because they were to an address that
	* was not associated */
	int nullfunc_ack; /* use workaround for nullfunc frame ACKs */

	spinlock_t sta_table_lock;
	int num_sta; /* number of entries in sta_list */
	struct list_head sta_list; /* STA info list head */
	struct sta_info *sta_hash[STA_HASH_SIZE];

	struct proc_dir_entry *proc;

	ap_policy_enum ap_policy;
	unsigned int max_inactivity;
	int autom_ap_wds;

	struct mac_restrictions mac_restrictions; /* MAC-based auth */
	int last_tx_rate;

	struct work_struct add_sta_proc_queue;
	struct add_sta_proc_data *add_sta_proc_entries;

	struct work_struct wds_oper_queue;
	struct wds_oper_data *wds_oper_entries;

	u16 tx_callback_idx;

	#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
	/* pointers to STA info; based on allocated AID or NULL if AID free
	* AID is in the range 1-2007, so sta_aid[0] corresponders to AID 1
	* and so on
	*/
	struct sta_info *sta_aid[MAX_AID_TABLE_SIZE];

	u16 tx_callback_auth, tx_callback_assoc, tx_callback_poll;

	/* WEP operations for generating challenges to be used with shared key
	* authentication */
	struct ieee80211_crypto_ops *crypt;
	void *crypt_priv;
	#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
	};


	void hostap_rx(struct net_device dev, struct sk_buff skb,
	struct hostap_80211_rx_status *rx_stats);
	void hostap_init_data(local_info_t *local);
	void hostap_init_ap_proc(local_info_t *local);
	void hostap_free_data(struct ap_data *ap);
	void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver);

	typedef enum {
	AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED,
	AP_TX_CONTINUE_NOT_AUTHORIZED
	} ap_tx_ret;
	struct hostap_tx_data {
	struct sk_buff *skb;
	int host_encrypt;
	struct ieee80211_crypt_data *crypt;
	void *sta_ptr;
	};
	ap_tx_ret hostap_handle_sta_tx(local_info_t local, struct hostap_tx_data tx);
	void hostap_handle_sta_release(void *ptr);
	void hostap_handle_sta_tx_exc(local_info_t local, struct sk_buff skb);
	int hostap_update_sta_ps(local_info_t local, struct ieee80211_hdr_4addr hdr);
	typedef enum {
	AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED
	} ap_rx_ret;
	ap_rx_ret hostap_handle_sta_rx(local_info_t local, struct net_device dev,
	struct sk_buff *skb,
	struct hostap_80211_rx_status *rx_stats,
	int wds);
	int hostap_handle_sta_crypto(local_info_t local, struct ieee80211_hdr_4addr hdr,
	struct ieee80211_crypt_data **crypt,
	void **sta_ptr);
	int hostap_is_sta_assoc(struct ap_data ap, u8 sta_addr);
	int hostap_is_sta_authorized(struct ap_data ap, u8 sta_addr);
	int hostap_add_sta(struct ap_data ap, u8 sta_addr);
	int hostap_update_rx_stats(struct ap_data ap, struct ieee80211_hdr_4addr hdr,
	struct hostap_80211_rx_status *rx_stats);
	void hostap_update_rates(local_info_t *local);
	void hostap_add_wds_links(local_info_t *local);
	void hostap_wds_link_oper(local_info_t local, u8 addr, wds_oper_type type);

	#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
	void hostap_deauth_all_stas(struct net_device dev, struct ap_data ap,
	int resend);
	#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */

	#endif /* HOSTAP_AP_H */