265 lines
8.1 KiB
C
265 lines
8.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef HOSTAP_AP_H
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#define HOSTAP_AP_H
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#include "hostap_80211.h"
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/* AP data structures for STAs */
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/* maximum number of frames to buffer per STA */
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#define STA_MAX_TX_BUFFER 32
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/* STA flags */
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#define WLAN_STA_AUTH BIT(0)
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#define WLAN_STA_ASSOC BIT(1)
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#define WLAN_STA_PS BIT(2)
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#define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */
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#define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
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#define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
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* controlling whether STA is authorized to
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* send and receive non-IEEE 802.1X frames
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*/
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#define WLAN_STA_PENDING_POLL BIT(6) /* pending activity poll not ACKed */
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#define WLAN_RATE_1M BIT(0)
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#define WLAN_RATE_2M BIT(1)
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#define WLAN_RATE_5M5 BIT(2)
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#define WLAN_RATE_11M BIT(3)
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#define WLAN_RATE_COUNT 4
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/* Maximum size of Supported Rates info element. IEEE 802.11 has a limit of 8,
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* but some pre-standard IEEE 802.11g products use longer elements. */
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#define WLAN_SUPP_RATES_MAX 32
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/* Try to increase TX rate after # successfully sent consecutive packets */
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#define WLAN_RATE_UPDATE_COUNT 50
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/* Decrease TX rate after # consecutive dropped packets */
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#define WLAN_RATE_DECREASE_THRESHOLD 2
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struct sta_info {
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struct list_head list;
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struct sta_info *hnext; /* next entry in hash table list */
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atomic_t users; /* number of users (do not remove if > 0) */
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struct proc_dir_entry *proc;
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u8 addr[6];
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u16 aid; /* STA's unique AID (1 .. 2007) or 0 if not yet assigned */
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u32 flags;
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u16 capability;
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u16 listen_interval; /* or beacon_int for APs */
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u8 supported_rates[WLAN_SUPP_RATES_MAX];
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unsigned long last_auth;
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unsigned long last_assoc;
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unsigned long last_rx;
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unsigned long last_tx;
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unsigned long rx_packets, tx_packets;
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unsigned long rx_bytes, tx_bytes;
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struct sk_buff_head tx_buf;
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/* FIX: timeout buffers with an expiry time somehow derived from
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* listen_interval */
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s8 last_rx_silence; /* Noise in dBm */
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s8 last_rx_signal; /* Signal strength in dBm */
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u8 last_rx_rate; /* TX rate in 0.1 Mbps */
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u8 last_rx_updated; /* IWSPY's struct iw_quality::updated */
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u8 tx_supp_rates; /* bit field of supported TX rates */
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u8 tx_rate; /* current TX rate (in 0.1 Mbps) */
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u8 tx_rate_idx; /* current TX rate (WLAN_RATE_*) */
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u8 tx_max_rate; /* max TX rate (WLAN_RATE_*) */
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u32 tx_count[WLAN_RATE_COUNT]; /* number of frames sent (per rate) */
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u32 rx_count[WLAN_RATE_COUNT]; /* number of frames received (per rate)
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*/
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u32 tx_since_last_failure;
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u32 tx_consecutive_exc;
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struct lib80211_crypt_data *crypt;
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int ap; /* whether this station is an AP */
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local_info_t *local;
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#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
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union {
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struct {
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char *challenge; /* shared key authentication
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* challenge */
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} sta;
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struct {
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int ssid_len;
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unsigned char ssid[MAX_SSID_LEN + 1]; /* AP's ssid */
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int channel;
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unsigned long last_beacon; /* last RX beacon time */
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} ap;
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} u;
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struct timer_list timer;
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enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next;
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#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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};
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#define MAX_STA_COUNT 1024
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/* Maximum number of AIDs to use for STAs; must be 2007 or lower
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* (8802.11 limitation) */
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#define MAX_AID_TABLE_SIZE 128
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#define STA_HASH_SIZE 256
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#define STA_HASH(sta) (sta[5])
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/* Default value for maximum station inactivity. After AP_MAX_INACTIVITY_SEC
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* has passed since last received frame from the station, a nullfunc data
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* frame is sent to the station. If this frame is not acknowledged and no other
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* frames have been received, the station will be disassociated after
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* AP_DISASSOC_DELAY. Similarly, a the station will be deauthenticated after
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* AP_DEAUTH_DELAY. AP_TIMEOUT_RESOLUTION is the resolution that is used with
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* max inactivity timer. */
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#define AP_MAX_INACTIVITY_SEC (5 * 60)
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#define AP_DISASSOC_DELAY (HZ)
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#define AP_DEAUTH_DELAY (HZ)
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/* ap_policy: whether to accept frames to/from other APs/IBSS */
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typedef enum {
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AP_OTHER_AP_SKIP_ALL = 0,
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AP_OTHER_AP_SAME_SSID = 1,
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AP_OTHER_AP_ALL = 2,
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AP_OTHER_AP_EVEN_IBSS = 3
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} ap_policy_enum;
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#define PRISM2_AUTH_OPEN BIT(0)
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#define PRISM2_AUTH_SHARED_KEY BIT(1)
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/* MAC address-based restrictions */
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struct mac_entry {
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struct list_head list;
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u8 addr[6];
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};
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struct mac_restrictions {
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enum { MAC_POLICY_OPEN = 0, MAC_POLICY_ALLOW, MAC_POLICY_DENY } policy;
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unsigned int entries;
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struct list_head mac_list;
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spinlock_t lock;
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};
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struct add_sta_proc_data {
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u8 addr[ETH_ALEN];
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struct add_sta_proc_data *next;
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};
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typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
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struct wds_oper_data {
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wds_oper_type type;
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u8 addr[ETH_ALEN];
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struct wds_oper_data *next;
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};
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struct ap_data {
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int initialized; /* whether ap_data has been initialized */
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local_info_t *local;
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int bridge_packets; /* send packet to associated STAs directly to the
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* wireless media instead of higher layers in the
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* kernel */
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unsigned int bridged_unicast; /* number of unicast frames bridged on
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* wireless media */
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unsigned int bridged_multicast; /* number of non-unicast frames
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* bridged on wireless media */
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unsigned int tx_drop_nonassoc; /* number of unicast TX packets dropped
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* because they were to an address that
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* was not associated */
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int nullfunc_ack; /* use workaround for nullfunc frame ACKs */
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spinlock_t sta_table_lock;
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int num_sta; /* number of entries in sta_list */
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struct list_head sta_list; /* STA info list head */
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struct sta_info *sta_hash[STA_HASH_SIZE];
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struct proc_dir_entry *proc;
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ap_policy_enum ap_policy;
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unsigned int max_inactivity;
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int autom_ap_wds;
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struct mac_restrictions mac_restrictions; /* MAC-based auth */
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int last_tx_rate;
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struct work_struct add_sta_proc_queue;
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struct add_sta_proc_data *add_sta_proc_entries;
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struct work_struct wds_oper_queue;
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struct wds_oper_data *wds_oper_entries;
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u16 tx_callback_idx;
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#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
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/* pointers to STA info; based on allocated AID or NULL if AID free
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* AID is in the range 1-2007, so sta_aid[0] corresponders to AID 1
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* and so on
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*/
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struct sta_info *sta_aid[MAX_AID_TABLE_SIZE];
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u16 tx_callback_auth, tx_callback_assoc, tx_callback_poll;
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/* WEP operations for generating challenges to be used with shared key
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* authentication */
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struct lib80211_crypto_ops *crypt;
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void *crypt_priv;
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#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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};
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void hostap_rx(struct net_device *dev, struct sk_buff *skb,
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struct hostap_80211_rx_status *rx_stats);
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void hostap_init_data(local_info_t *local);
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void hostap_init_ap_proc(local_info_t *local);
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void hostap_free_data(struct ap_data *ap);
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void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver);
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typedef enum {
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AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED,
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AP_TX_CONTINUE_NOT_AUTHORIZED
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} ap_tx_ret;
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struct hostap_tx_data {
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struct sk_buff *skb;
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int host_encrypt;
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struct lib80211_crypt_data *crypt;
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void *sta_ptr;
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};
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ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx);
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void hostap_handle_sta_release(void *ptr);
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void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb);
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int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr);
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typedef enum {
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AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED
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} ap_rx_ret;
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ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
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struct sk_buff *skb,
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struct hostap_80211_rx_status *rx_stats,
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int wds);
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int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr *hdr,
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struct lib80211_crypt_data **crypt,
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void **sta_ptr);
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int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr);
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int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr);
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int hostap_add_sta(struct ap_data *ap, u8 *sta_addr);
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int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr *hdr,
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struct hostap_80211_rx_status *rx_stats);
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void hostap_update_rates(local_info_t *local);
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void hostap_add_wds_links(local_info_t *local);
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void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type);
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#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
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void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
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int resend);
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#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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#endif /* HOSTAP_AP_H */
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