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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef HOSTAP_AP_H
#define HOSTAP_AP_H
#include "hostap_80211.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 lib80211_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. Similarly, 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 lib80211_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 lib80211_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 *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 *hdr,
struct lib80211_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 *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 */
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