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 */ 264