LXR linux/drivers/net/wireless/hostap/hostap

   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
  39struct 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. Similarily, 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 */
 125typedef 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 */
 137struct mac_entry {
 138        struct list_head list;
 139        u8 addr[6];
 140};
 141
 142struct 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
 150struct add_sta_proc_data {
 151        u8 addr[ETH_ALEN];
 152        struct add_sta_proc_data *next;
 153};
 154
 155
 156typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
 157struct wds_oper_data {
 158        wds_oper_type type;
 159        u8 addr[ETH_ALEN];
 160        struct wds_oper_data *next;
 161};
 162
 163
 164struct 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
 218void hostap_rx(struct net_device *dev, struct sk_buff *skb,
 219               struct hostap_80211_rx_status *rx_stats);
 220void hostap_init_data(local_info_t *local);
 221void hostap_init_ap_proc(local_info_t *local);
 222void hostap_free_data(struct ap_data *ap);
 223void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver);
 224
 225typedef enum {
 226        AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED,
 227        AP_TX_CONTINUE_NOT_AUTHORIZED
 228} ap_tx_ret;
 229struct hostap_tx_data {
 230        struct sk_buff *skb;
 231        int host_encrypt;
 232        struct lib80211_crypt_data *crypt;
 233        void *sta_ptr;
 234};
 235ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx);
 236void hostap_handle_sta_release(void *ptr);
 237void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb);
 238int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr);
 239typedef enum {
 240        AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED
 241} ap_rx_ret;
 242ap_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);
 246int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr *hdr,
 247                             struct lib80211_crypt_data **crypt,
 248                             void **sta_ptr);
 249int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr);
 250int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr);
 251int hostap_add_sta(struct ap_data *ap, u8 *sta_addr);
 252int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr *hdr,
 253                           struct hostap_80211_rx_status *rx_stats);
 254void hostap_update_rates(local_info_t *local);
 255void hostap_add_wds_links(local_info_t *local);
 256void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type);
 257
 258#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 259void 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 */
 264