drivers/net/wireless/hostap/hostap_ap.h

   1 #ifndef HOSTAP_AP_H
   2 #define HOSTAP_AP_H
   3
   4 /* AP data structures for STAs */
   5
   6 /* maximum number of frames to buffer per STA */
   7 #define STA_MAX_TX_BUFFER 32
   8
   9 /* STA flags */
  10 #define WLAN_STA_AUTH BIT(0)
  11 #define WLAN_STA_ASSOC BIT(1)
  12 #define WLAN_STA_PS BIT(2)
  13 #define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */
  14 #define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
  15 #define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
  16                                     * controlling whether STA is authorized to
  17                                     * send and receive non-IEEE 802.1X frames
  18                                     */
  19 #define WLAN_STA_PENDING_POLL BIT(6) /* pending activity poll not ACKed */
  20
  21 #define WLAN_RATE_1M BIT(0)
  22 #define WLAN_RATE_2M BIT(1)
  23 #define WLAN_RATE_5M5 BIT(2)
  24 #define WLAN_RATE_11M BIT(3)
  25 #define WLAN_RATE_COUNT 4
  26
  27 /* Maximum size of Supported Rates info element. IEEE 802.11 has a limit of 8,
  28  * but some pre-standard IEEE 802.11g products use longer elements. */
  29 #define WLAN_SUPP_RATES_MAX 32
  30
  31 /* Try to increase TX rate after # successfully sent consecutive packets */
  32 #define WLAN_RATE_UPDATE_COUNT 50
  33
  34 /* Decrease TX rate after # consecutive dropped packets */
  35 #define WLAN_RATE_DECREASE_THRESHOLD 2
  36
  37 struct sta_info {
  38         struct list_head list;
  39         struct sta_info *hnext; /* next entry in hash table list */
  40         atomic_t users; /* number of users (do not remove if > 0) */
  41         struct proc_dir_entry *proc;
  42
  43         u8 addr[6];
  44         u16 aid; /* STA's unique AID (1 .. 2007) or 0 if not yet assigned */
  45         u32 flags;
  46         u16 capability;
  47         u16 listen_interval; /* or beacon_int for APs */
  48         u8 supported_rates[WLAN_SUPP_RATES_MAX];
  49
  50         unsigned long last_auth;
  51         unsigned long last_assoc;
  52         unsigned long last_rx;
  53         unsigned long last_tx;
  54         unsigned long rx_packets, tx_packets;
  55         unsigned long rx_bytes, tx_bytes;
  56         struct sk_buff_head tx_buf;
  57         /* FIX: timeout buffers with an expiry time somehow derived from
  58          * listen_interval */
  59
  60         s8 last_rx_silence; /* Noise in dBm */
  61         s8 last_rx_signal; /* Signal strength in dBm */
  62         u8 last_rx_rate; /* TX rate in 0.1 Mbps */
  63         u8 last_rx_updated; /* IWSPY's struct iw_quality::updated */
  64
  65         u8 tx_supp_rates; /* bit field of supported TX rates */
  66         u8 tx_rate; /* current TX rate (in 0.1 Mbps) */
  67         u8 tx_rate_idx; /* current TX rate (WLAN_RATE_*) */
  68         u8 tx_max_rate; /* max TX rate (WLAN_RATE_*) */
  69         u32 tx_count[WLAN_RATE_COUNT]; /* number of frames sent (per rate) */
  70         u32 rx_count[WLAN_RATE_COUNT]; /* number of frames received (per rate)
  71                                         */
  72         u32 tx_since_last_failure;
  73         u32 tx_consecutive_exc;
  74
  75         struct ieee80211_crypt_data *crypt;
  76
  77         int ap; /* whether this station is an AP */
  78
  79         local_info_t *local;
  80
  81 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
  82         union {
  83                 struct {
  84                         char *challenge; /* shared key authentication
  85                                           * challenge */
  86                 } sta;
  87                 struct {
  88                         int ssid_len;
  89                         unsigned char ssid[MAX_SSID_LEN + 1]; /* AP's ssid */
  90                         int channel;
  91                         unsigned long last_beacon; /* last RX beacon time */
  92                 } ap;
  93         } u;
  94
  95         struct timer_list timer;
  96         enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next;
  97 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
  98 };
  99
 100
 101 #define MAX_STA_COUNT 1024
 102
 103 /* Maximum number of AIDs to use for STAs; must be 2007 or lower
 104  * (8802.11 limitation) */
 105 #define MAX_AID_TABLE_SIZE 128
 106
 107 #define STA_HASH_SIZE 256
 108 #define STA_HASH(sta) (sta[5])
 109
 110
 111 /* Default value for maximum station inactivity. After AP_MAX_INACTIVITY_SEC
 112  * has passed since last received frame from the station, a nullfunc data
 113  * frame is sent to the station. If this frame is not acknowledged and no other
 114  * frames have been received, the station will be disassociated after
 115  * AP_DISASSOC_DELAY. Similarily, a the station will be deauthenticated after
 116  * AP_DEAUTH_DELAY. AP_TIMEOUT_RESOLUTION is the resolution that is used with
 117  * max inactivity timer. */
 118 #define AP_MAX_INACTIVITY_SEC (5 * 60)
 119 #define AP_DISASSOC_DELAY (HZ)
 120 #define AP_DEAUTH_DELAY (HZ)
 121
 122 /* ap_policy: whether to accept frames to/from other APs/IBSS */
 123 typedef enum {
 124         AP_OTHER_AP_SKIP_ALL = 0,
 125         AP_OTHER_AP_SAME_SSID = 1,
 126         AP_OTHER_AP_ALL = 2,
 127         AP_OTHER_AP_EVEN_IBSS = 3
 128 } ap_policy_enum;
 129
 130 #define PRISM2_AUTH_OPEN BIT(0)
 131 #define PRISM2_AUTH_SHARED_KEY BIT(1)
 132
 133
 134 /* MAC address-based restrictions */
 135 struct mac_entry {
 136         struct list_head list;
 137         u8 addr[6];
 138 };
 139
 140 struct mac_restrictions {
 141         enum { MAC_POLICY_OPEN = 0, MAC_POLICY_ALLOW, MAC_POLICY_DENY } policy;
 142         unsigned int entries;
 143         struct list_head mac_list;
 144         spinlock_t lock;
 145 };
 146
 147
 148 struct add_sta_proc_data {
 149         u8 addr[ETH_ALEN];
 150         struct add_sta_proc_data *next;
 151 };
 152
 153
 154 typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
 155 struct wds_oper_data {
 156         wds_oper_type type;
 157         u8 addr[ETH_ALEN];
 158         struct wds_oper_data *next;
 159 };
 160
 161
 162 struct ap_data {
 163         int initialized; /* whether ap_data has been initialized */
 164         local_info_t *local;
 165         int bridge_packets; /* send packet to associated STAs directly to the
 166                              * wireless media instead of higher layers in the
 167                              * kernel */
 168         unsigned int bridged_unicast; /* number of unicast frames bridged on
 169                                        * wireless media */
 170         unsigned int bridged_multicast; /* number of non-unicast frames
 171                                          * bridged on wireless media */
 172         unsigned int tx_drop_nonassoc; /* number of unicast TX packets dropped
 173                                         * because they were to an address that
 174                                         * was not associated */
 175         int nullfunc_ack; /* use workaround for nullfunc frame ACKs */
 176
 177         spinlock_t sta_table_lock;
 178         int num_sta; /* number of entries in sta_list */
 179         struct list_head sta_list; /* STA info list head */
 180         struct sta_info *sta_hash[STA_HASH_SIZE];
 181
 182         struct proc_dir_entry *proc;
 183
 184         ap_policy_enum ap_policy;
 185         unsigned int max_inactivity;
 186         int autom_ap_wds;
 187
 188         struct mac_restrictions mac_restrictions; /* MAC-based auth */
 189         int last_tx_rate;
 190
 191         struct work_struct add_sta_proc_queue;
 192         struct add_sta_proc_data *add_sta_proc_entries;
 193
 194         struct work_struct wds_oper_queue;
 195         struct wds_oper_data *wds_oper_entries;
 196
 197         u16 tx_callback_idx;
 198
 199 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 200         /* pointers to STA info; based on allocated AID or NULL if AID free
 201          * AID is in the range 1-2007, so sta_aid[0] corresponders to AID 1
 202          * and so on
 203          */
 204         struct sta_info *sta_aid[MAX_AID_TABLE_SIZE];
 205
 206         u16 tx_callback_auth, tx_callback_assoc, tx_callback_poll;
 207
 208         /* WEP operations for generating challenges to be used with shared key
 209          * authentication */
 210         struct ieee80211_crypto_ops *crypt;
 211         void *crypt_priv;
 212 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 213 };
 214
 215
 216 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
 217                struct hostap_80211_rx_status *rx_stats);
 218 void hostap_init_data(local_info_t *local);
 219 void hostap_init_ap_proc(local_info_t *local);
 220 void hostap_free_data(struct ap_data *ap);
 221 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver);
 222
 223 typedef enum {
 224         AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED,
 225         AP_TX_CONTINUE_NOT_AUTHORIZED
 226 } ap_tx_ret;
 227 struct hostap_tx_data {
 228         struct sk_buff *skb;
 229         int host_encrypt;
 230         struct ieee80211_crypt_data *crypt;
 231         void *sta_ptr;
 232 };
 233 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx);
 234 void hostap_handle_sta_release(void *ptr);
 235 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb);
 236 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr);
 237 typedef enum {
 238         AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED
 239 } ap_rx_ret;
 240 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
 241                                struct sk_buff *skb,
 242                                struct hostap_80211_rx_status *rx_stats,
 243                                int wds);
 244 int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr_4addr *hdr,
 245                              struct ieee80211_crypt_data **crypt,
 246                              void **sta_ptr);
 247 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr);
 248 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr);
 249 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr);
 250 int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr_4addr *hdr,
 251                            struct hostap_80211_rx_status *rx_stats);
 252 void hostap_update_rates(local_info_t *local);
 253 void hostap_add_wds_links(local_info_t *local);
 254 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type);
 255
 256 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 257 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
 258                             int resend);
 259 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 260
 261 #endif /* HOSTAP_AP_H */