drivers/net/wireless/hostap/hostap_ap.h

   1 #ifndef HOSTAP_AP_H
   2 #define HOSTAP_AP_H
   3
   4 #include "hostap_80211.h"
   5
   6 /* AP data structures for STAs */
   7
   8 /* maximum number of frames to buffer per STA */
   9 #define STA_MAX_TX_BUFFER 32
  10
  11 /* STA flags */
  12 #define WLAN_STA_AUTH BIT(0)
  13 #define WLAN_STA_ASSOC BIT(1)
  14 #define WLAN_STA_PS BIT(2)
  15 #define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */
  16 #define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
  17 #define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
  18                                     * controlling whether STA is authorized to
  19                                     * send and receive non-IEEE 802.1X frames
  20                                     */
  21 #define WLAN_STA_PENDING_POLL BIT(6) /* pending activity poll not ACKed */
  22
  23 #define WLAN_RATE_1M BIT(0)
  24 #define WLAN_RATE_2M BIT(1)
  25 #define WLAN_RATE_5M5 BIT(2)
  26 #define WLAN_RATE_11M BIT(3)
  27 #define WLAN_RATE_COUNT 4
  28
  29 /* Maximum size of Supported Rates info element. IEEE 802.11 has a limit of 8,
  30  * but some pre-standard IEEE 802.11g products use longer elements. */
  31 #define WLAN_SUPP_RATES_MAX 32
  32
  33 /* Try to increase TX rate after # successfully sent consecutive packets */
  34 #define WLAN_RATE_UPDATE_COUNT 50
  35
  36 /* Decrease TX rate after # consecutive dropped packets */
  37 #define WLAN_RATE_DECREASE_THRESHOLD 2
  38
  39 struct sta_info {
  40         struct list_head list;
  41         struct sta_info *hnext; /* next entry in hash table list */
  42         atomic_t users; /* number of users (do not remove if > 0) */
  43         struct proc_dir_entry *proc;
  44
  45         u8 addr[6];
  46         u16 aid; /* STA's unique AID (1 .. 2007) or 0 if not yet assigned */
  47         u32 flags;
  48         u16 capability;
  49         u16 listen_interval; /* or beacon_int for APs */
  50         u8 supported_rates[WLAN_SUPP_RATES_MAX];
  51
  52         unsigned long last_auth;
  53         unsigned long last_assoc;
  54         unsigned long last_rx;
  55         unsigned long last_tx;
  56         unsigned long rx_packets, tx_packets;
  57         unsigned long rx_bytes, tx_bytes;
  58         struct sk_buff_head tx_buf;
  59         /* FIX: timeout buffers with an expiry time somehow derived from
  60          * listen_interval */
  61
  62         s8 last_rx_silence; /* Noise in dBm */
  63         s8 last_rx_signal; /* Signal strength in dBm */
  64         u8 last_rx_rate; /* TX rate in 0.1 Mbps */
  65         u8 last_rx_updated; /* IWSPY's struct iw_quality::updated */
  66
  67         u8 tx_supp_rates; /* bit field of supported TX rates */
  68         u8 tx_rate; /* current TX rate (in 0.1 Mbps) */
  69         u8 tx_rate_idx; /* current TX rate (WLAN_RATE_*) */
  70         u8 tx_max_rate; /* max TX rate (WLAN_RATE_*) */
  71         u32 tx_count[WLAN_RATE_COUNT]; /* number of frames sent (per rate) */
  72         u32 rx_count[WLAN_RATE_COUNT]; /* number of frames received (per rate)
  73                                         */
  74         u32 tx_since_last_failure;
  75         u32 tx_consecutive_exc;
  76
  77         struct lib80211_crypt_data *crypt;
  78
  79         int ap; /* whether this station is an AP */
  80
  81         local_info_t *local;
  82
  83 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
  84         union {
  85                 struct {
  86                         char *challenge; /* shared key authentication
  87                                           * challenge */
  88                 } sta;
  89                 struct {
  90                         int ssid_len;
  91                         unsigned char ssid[MAX_SSID_LEN + 1]; /* AP's ssid */
  92                         int channel;
  93                         unsigned long last_beacon; /* last RX beacon time */
  94                 } ap;
  95         } u;
  96
  97         struct timer_list timer;
  98         enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next;
  99 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 100 };
 101
 102
 103 #define MAX_STA_COUNT 1024
 104
 105 /* Maximum number of AIDs to use for STAs; must be 2007 or lower
 106  * (8802.11 limitation) */
 107 #define MAX_AID_TABLE_SIZE 128
 108
 109 #define STA_HASH_SIZE 256
 110 #define STA_HASH(sta) (sta[5])
 111
 112
 113 /* Default value for maximum station inactivity. After AP_MAX_INACTIVITY_SEC
 114  * has passed since last received frame from the station, a nullfunc data
 115  * frame is sent to the station. If this frame is not acknowledged and no other
 116  * frames have been received, the station will be disassociated after
 117  * AP_DISASSOC_DELAY. Similarly, a the station will be deauthenticated after
 118  * AP_DEAUTH_DELAY. AP_TIMEOUT_RESOLUTION is the resolution that is used with
 119  * max inactivity timer. */
 120 #define AP_MAX_INACTIVITY_SEC (5 * 60)
 121 #define AP_DISASSOC_DELAY (HZ)
 122 #define AP_DEAUTH_DELAY (HZ)
 123
 124 /* ap_policy: whether to accept frames to/from other APs/IBSS */
 125 typedef enum {
 126         AP_OTHER_AP_SKIP_ALL = 0,
 127         AP_OTHER_AP_SAME_SSID = 1,
 128         AP_OTHER_AP_ALL = 2,
 129         AP_OTHER_AP_EVEN_IBSS = 3
 130 } ap_policy_enum;
 131
 132 #define PRISM2_AUTH_OPEN BIT(0)
 133 #define PRISM2_AUTH_SHARED_KEY BIT(1)
 134
 135
 136 /* MAC address-based restrictions */
 137 struct mac_entry {
 138         struct list_head list;
 139         u8 addr[6];
 140 };
 141
 142 struct mac_restrictions {
 143         enum { MAC_POLICY_OPEN = 0, MAC_POLICY_ALLOW, MAC_POLICY_DENY } policy;
 144         unsigned int entries;
 145         struct list_head mac_list;
 146         spinlock_t lock;
 147 };
 148
 149
 150 struct add_sta_proc_data {
 151         u8 addr[ETH_ALEN];
 152         struct add_sta_proc_data *next;
 153 };
 154
 155
 156 typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
 157 struct wds_oper_data {
 158         wds_oper_type type;
 159         u8 addr[ETH_ALEN];
 160         struct wds_oper_data *next;
 161 };
 162
 163
 164 struct ap_data {
 165         int initialized; /* whether ap_data has been initialized */
 166         local_info_t *local;
 167         int bridge_packets; /* send packet to associated STAs directly to the
 168                              * wireless media instead of higher layers in the
 169                              * kernel */
 170         unsigned int bridged_unicast; /* number of unicast frames bridged on
 171                                        * wireless media */
 172         unsigned int bridged_multicast; /* number of non-unicast frames
 173                                          * bridged on wireless media */
 174         unsigned int tx_drop_nonassoc; /* number of unicast TX packets dropped
 175                                         * because they were to an address that
 176                                         * was not associated */
 177         int nullfunc_ack; /* use workaround for nullfunc frame ACKs */
 178
 179         spinlock_t sta_table_lock;
 180         int num_sta; /* number of entries in sta_list */
 181         struct list_head sta_list; /* STA info list head */
 182         struct sta_info *sta_hash[STA_HASH_SIZE];
 183
 184         struct proc_dir_entry *proc;
 185
 186         ap_policy_enum ap_policy;
 187         unsigned int max_inactivity;
 188         int autom_ap_wds;
 189
 190         struct mac_restrictions mac_restrictions; /* MAC-based auth */
 191         int last_tx_rate;
 192
 193         struct work_struct add_sta_proc_queue;
 194         struct add_sta_proc_data *add_sta_proc_entries;
 195
 196         struct work_struct wds_oper_queue;
 197         struct wds_oper_data *wds_oper_entries;
 198
 199         u16 tx_callback_idx;
 200
 201 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 202         /* pointers to STA info; based on allocated AID or NULL if AID free
 203          * AID is in the range 1-2007, so sta_aid[0] corresponders to AID 1
 204          * and so on
 205          */
 206         struct sta_info *sta_aid[MAX_AID_TABLE_SIZE];
 207
 208         u16 tx_callback_auth, tx_callback_assoc, tx_callback_poll;
 209
 210         /* WEP operations for generating challenges to be used with shared key
 211          * authentication */
 212         struct lib80211_crypto_ops *crypt;
 213         void *crypt_priv;
 214 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 215 };
 216
 217
 218 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
 219                struct hostap_80211_rx_status *rx_stats);
 220 void hostap_init_data(local_info_t *local);
 221 void hostap_init_ap_proc(local_info_t *local);
 222 void hostap_free_data(struct ap_data *ap);
 223 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver);
 224
 225 typedef enum {
 226         AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED,
 227         AP_TX_CONTINUE_NOT_AUTHORIZED
 228 } ap_tx_ret;
 229 struct hostap_tx_data {
 230         struct sk_buff *skb;
 231         int host_encrypt;
 232         struct lib80211_crypt_data *crypt;
 233         void *sta_ptr;
 234 };
 235 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx);
 236 void hostap_handle_sta_release(void *ptr);
 237 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb);
 238 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr);
 239 typedef enum {
 240         AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED
 241 } ap_rx_ret;
 242 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
 243                                struct sk_buff *skb,
 244                                struct hostap_80211_rx_status *rx_stats,
 245                                int wds);
 246 int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr *hdr,
 247                              struct lib80211_crypt_data **crypt,
 248                              void **sta_ptr);
 249 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr);
 250 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr);
 251 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr);
 252 int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr *hdr,
 253                            struct hostap_80211_rx_status *rx_stats);
 254 void hostap_update_rates(local_info_t *local);
 255 void hostap_add_wds_links(local_info_t *local);
 256 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type);
 257
 258 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 259 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
 260                             int resend);
 261 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 262
 263 #endif /* HOSTAP_AP_H */