1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef HOSTAP_AP_H 3 #define HOSTAP_AP_H 4 5 #include "hostap_80211.h" 6 7 /* AP data structures for STAs */ 8 9 /* maximum number of frames to buffer per STA */ 10 #define STA_MAX_TX_BUFFER 32 11 12 /* STA flags */ 13 #define WLAN_STA_AUTH BIT(0) 14 #define WLAN_STA_ASSOC BIT(1) 15 #define WLAN_STA_PS BIT(2) 16 #define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */ 17 #define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */ 18 #define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is 19 * controlling whether STA is authorized to 20 * send and receive non-IEEE 802.1X frames 21 */ 22 #define WLAN_STA_PENDING_POLL BIT(6) /* pending activity poll not ACKed */ 23 24 #define WLAN_RATE_1M BIT(0) 25 #define WLAN_RATE_2M BIT(1) 26 #define WLAN_RATE_5M5 BIT(2) 27 #define WLAN_RATE_11M BIT(3) 28 #define WLAN_RATE_COUNT 4 29 30 /* Maximum size of Supported Rates info element. IEEE 802.11 has a limit of 8, 31 * but some pre-standard IEEE 802.11g products use longer elements. */ 32 #define WLAN_SUPP_RATES_MAX 32 33 34 /* Try to increase TX rate after # successfully sent consecutive packets */ 35 #define WLAN_RATE_UPDATE_COUNT 50 36 37 /* Decrease TX rate after # consecutive dropped packets */ 38 #define WLAN_RATE_DECREASE_THRESHOLD 2 39 40 struct sta_info { 41 struct list_head list; 42 struct sta_info *hnext; /* next entry in hash table list */ 43 atomic_t users; /* number of users (do not remove if > 0) */ 44 struct proc_dir_entry *proc; 45 46 u8 addr[6]; 47 u16 aid; /* STA's unique AID (1 .. 2007) or 0 if not yet assigned */ 48 u32 flags; 49 u16 capability; 50 u16 listen_interval; /* or beacon_int for APs */ 51 u8 supported_rates[WLAN_SUPP_RATES_MAX]; 52 53 unsigned long last_auth; 54 unsigned long last_assoc; 55 unsigned long last_rx; 56 unsigned long last_tx; 57 unsigned long rx_packets, tx_packets; 58 unsigned long rx_bytes, tx_bytes; 59 struct sk_buff_head tx_buf; 60 /* FIX: timeout buffers with an expiry time somehow derived from 61 * listen_interval */ 62 63 s8 last_rx_silence; /* Noise in dBm */ 64 s8 last_rx_signal; /* Signal strength in dBm */ 65 u8 last_rx_rate; /* TX rate in 0.1 Mbps */ 66 u8 last_rx_updated; /* IWSPY's struct iw_quality::updated */ 67 68 u8 tx_supp_rates; /* bit field of supported TX rates */ 69 u8 tx_rate; /* current TX rate (in 0.1 Mbps) */ 70 u8 tx_rate_idx; /* current TX rate (WLAN_RATE_*) */ 71 u8 tx_max_rate; /* max TX rate (WLAN_RATE_*) */ 72 u32 tx_count[WLAN_RATE_COUNT]; /* number of frames sent (per rate) */ 73 u32 rx_count[WLAN_RATE_COUNT]; /* number of frames received (per rate) 74 */ 75 u32 tx_since_last_failure; 76 u32 tx_consecutive_exc; 77 78 struct lib80211_crypt_data *crypt; 79 80 int ap; /* whether this station is an AP */ 81 82 local_info_t *local; 83 84 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT 85 union { 86 struct { 87 char *challenge; /* shared key authentication 88 * challenge */ 89 } sta; 90 struct { 91 int ssid_len; 92 unsigned char ssid[MAX_SSID_LEN + 1]; /* AP's ssid */ 93 int channel; 94 unsigned long last_beacon; /* last RX beacon time */ 95 } ap; 96 } u; 97 98 struct timer_list timer; 99 enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next; 100 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ 101 }; 102 103 104 #define MAX_STA_COUNT 1024 105 106 /* Maximum number of AIDs to use for STAs; must be 2007 or lower 107 * (8802.11 limitation) */ 108 #define MAX_AID_TABLE_SIZE 128 109 110 #define STA_HASH_SIZE 256 111 #define STA_HASH(sta) (sta[5]) 112 113 114 /* Default value for maximum station inactivity. After AP_MAX_INACTIVITY_SEC 115 * has passed since last received frame from the station, a nullfunc data 116 * frame is sent to the station. If this frame is not acknowledged and no other 117 * frames have been received, the station will be disassociated after 118 * AP_DISASSOC_DELAY. Similarly, a the station will be deauthenticated after 119 * AP_DEAUTH_DELAY. AP_TIMEOUT_RESOLUTION is the resolution that is used with 120 * max inactivity timer. */ 121 #define AP_MAX_INACTIVITY_SEC (5 * 60) 122 #define AP_DISASSOC_DELAY (HZ) 123 #define AP_DEAUTH_DELAY (HZ) 124 125 /* ap_policy: whether to accept frames to/from other APs/IBSS */ 126 typedef enum { 127 AP_OTHER_AP_SKIP_ALL = 0, 128 AP_OTHER_AP_SAME_SSID = 1, 129 AP_OTHER_AP_ALL = 2, 130 AP_OTHER_AP_EVEN_IBSS = 3 131 } ap_policy_enum; 132 133 #define PRISM2_AUTH_OPEN BIT(0) 134 #define PRISM2_AUTH_SHARED_KEY BIT(1) 135 136 137 /* MAC address-based restrictions */ 138 struct mac_entry { 139 struct list_head list; 140 u8 addr[6]; 141 }; 142 143 struct mac_restrictions { 144 enum { MAC_POLICY_OPEN = 0, MAC_POLICY_ALLOW, MAC_POLICY_DENY } policy; 145 unsigned int entries; 146 struct list_head mac_list; 147 spinlock_t lock; 148 }; 149 150 151 struct add_sta_proc_data { 152 u8 addr[ETH_ALEN]; 153 struct add_sta_proc_data *next; 154 }; 155 156 157 typedef enum { WDS_ADD, WDS_DEL } wds_oper_type; 158 struct wds_oper_data { 159 wds_oper_type type; 160 u8 addr[ETH_ALEN]; 161 struct wds_oper_data *next; 162 }; 163 164 165 struct ap_data { 166 int initialized; /* whether ap_data has been initialized */ 167 local_info_t *local; 168 int bridge_packets; /* send packet to associated STAs directly to the 169 * wireless media instead of higher layers in the 170 * kernel */ 171 unsigned int bridged_unicast; /* number of unicast frames bridged on 172 * wireless media */ 173 unsigned int bridged_multicast; /* number of non-unicast frames 174 * bridged on wireless media */ 175 unsigned int tx_drop_nonassoc; /* number of unicast TX packets dropped 176 * because they were to an address that 177 * was not associated */ 178 int nullfunc_ack; /* use workaround for nullfunc frame ACKs */ 179 180 spinlock_t sta_table_lock; 181 int num_sta; /* number of entries in sta_list */ 182 struct list_head sta_list; /* STA info list head */ 183 struct sta_info *sta_hash[STA_HASH_SIZE]; 184 185 struct proc_dir_entry *proc; 186 187 ap_policy_enum ap_policy; 188 unsigned int max_inactivity; 189 int autom_ap_wds; 190 191 struct mac_restrictions mac_restrictions; /* MAC-based auth */ 192 int last_tx_rate; 193 194 struct work_struct add_sta_proc_queue; 195 struct add_sta_proc_data *add_sta_proc_entries; 196 197 struct work_struct wds_oper_queue; 198 struct wds_oper_data *wds_oper_entries; 199 200 u16 tx_callback_idx; 201 202 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT 203 /* pointers to STA info; based on allocated AID or NULL if AID free 204 * AID is in the range 1-2007, so sta_aid[0] corresponders to AID 1 205 * and so on 206 */ 207 struct sta_info *sta_aid[MAX_AID_TABLE_SIZE]; 208 209 u16 tx_callback_auth, tx_callback_assoc, tx_callback_poll; 210 211 /* WEP operations for generating challenges to be used with shared key 212 * authentication */ 213 struct lib80211_crypto_ops *crypt; 214 void *crypt_priv; 215 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ 216 }; 217 218 219 void hostap_rx(struct net_device *dev, struct sk_buff *skb, 220 struct hostap_80211_rx_status *rx_stats); 221 void hostap_init_data(local_info_t *local); 222 void hostap_init_ap_proc(local_info_t *local); 223 void hostap_free_data(struct ap_data *ap); 224 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver); 225 226 typedef enum { 227 AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED, 228 AP_TX_CONTINUE_NOT_AUTHORIZED 229 } ap_tx_ret; 230 struct hostap_tx_data { 231 struct sk_buff *skb; 232 int host_encrypt; 233 struct lib80211_crypt_data *crypt; 234 void *sta_ptr; 235 }; 236 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx); 237 void hostap_handle_sta_release(void *ptr); 238 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb); 239 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr); 240 typedef enum { 241 AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED 242 } ap_rx_ret; 243 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev, 244 struct sk_buff *skb, 245 struct hostap_80211_rx_status *rx_stats, 246 int wds); 247 int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr *hdr, 248 struct lib80211_crypt_data **crypt, 249 void **sta_ptr); 250 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr); 251 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr); 252 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr); 253 int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr *hdr, 254 struct hostap_80211_rx_status *rx_stats); 255 void hostap_update_rates(local_info_t *local); 256 void hostap_add_wds_links(local_info_t *local); 257 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type); 258 259 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT 260 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap, 261 int resend); 262 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */ 263 264 #endif /* HOSTAP_AP_H */ 265