drivers/net/wireless/intersil/hostap/hostap_ap.h

   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 */