net/mac80211/sta_info.h

   1 /*
   2  * Copyright 2002-2005, Devicescape Software, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef STA_INFO_H
  10 #define STA_INFO_H
  11
  12 #include <linux/list.h>
  13 #include <linux/types.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/kref.h>
  16 #include "ieee80211_key.h"
  17
  18 /* Stations flags (struct sta_info::flags) */
  19 #define WLAN_STA_AUTH BIT(0)
  20 #define WLAN_STA_ASSOC BIT(1)
  21 #define WLAN_STA_PS BIT(2)
  22 #define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */
  23 #define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
  24 #define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
  25                                     * controlling whether STA is authorized to
  26                                     * send and receive non-IEEE 802.1X frames
  27                                     */
  28 #define WLAN_STA_SHORT_PREAMBLE BIT(7)
  29 /* whether this is an AP that we are associated with as a client */
  30 #define WLAN_STA_ASSOC_AP BIT(8)
  31 #define WLAN_STA_WME BIT(9)
  32 #define WLAN_STA_WDS BIT(27)
  33
  34 #define STA_TID_NUM 16
  35 #define ADDBA_RESP_INTERVAL HZ
  36
  37 #define HT_AGG_STATE_INITIATOR_SHIFT    (4)
  38
  39 #define HT_AGG_STATE_REQ_STOP_BA_MSK    BIT(3)
  40
  41 #define HT_AGG_STATE_IDLE               (0x0)
  42 #define HT_AGG_STATE_OPERATIONAL        (0x7)
  43
  44 /**
  45  * struct tid_ampdu_rx - TID aggregation information (Rx).
  46  *
  47  * @state: TID's state in session state machine.
  48  * @dialog_token: dialog token for aggregation session
  49  * @ssn: Starting Sequence Number expected to be aggregated.
  50  * @buf_size: buffer size for incoming A-MPDUs
  51  * @timeout: reset timer value.
  52  * @head_seq_num: head sequence number in reordering buffer.
  53  * @stored_mpdu_num: number of MPDUs in reordering buffer
  54  * @reorder_buf: buffer to reorder incoming aggregated MPDUs
  55  * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
  56  */
  57 struct tid_ampdu_rx {
  58         u8 state;
  59         u8 dialog_token;
  60         u16 ssn;
  61         u16 buf_size;
  62         u16 timeout;
  63         u16 head_seq_num;
  64         u16 stored_mpdu_num;
  65         struct sk_buff **reorder_buf;
  66         struct timer_list session_timer;
  67 };
  68
  69 /**
  70  * struct sta_ampdu_mlme - STA aggregation information.
  71  *
  72  * @tid_agg_info_rx: aggregation info for Rx per TID
  73  * @ampdu_rx: for locking sections in aggregation Rx flow
  74  */
  75 struct sta_ampdu_mlme {
  76         struct tid_ampdu_rx tid_rx[STA_TID_NUM];
  77         spinlock_t ampdu_rx;
  78 };
  79
  80 struct sta_info {
  81         struct kref kref;
  82         struct list_head list;
  83         struct sta_info *hnext; /* next entry in hash table list */
  84
  85         struct ieee80211_local *local;
  86
  87         u8 addr[ETH_ALEN];
  88         u16 aid; /* STA's unique AID (1..2007), 0 = not yet assigned */
  89         u32 flags; /* WLAN_STA_ */
  90
  91         struct sk_buff_head ps_tx_buf; /* buffer of TX frames for station in
  92                                         * power saving state */
  93         int pspoll; /* whether STA has send a PS Poll frame */
  94         struct sk_buff_head tx_filtered; /* buffer of TX frames that were
  95                                           * already given to low-level driver,
  96                                           * but were filtered */
  97         int clear_dst_mask;
  98
  99         unsigned long rx_packets, tx_packets; /* number of RX/TX MSDUs */
 100         unsigned long rx_bytes, tx_bytes;
 101         unsigned long tx_retry_failed, tx_retry_count;
 102         unsigned long tx_filtered_count;
 103
 104         unsigned int wep_weak_iv_count; /* number of RX frames with weak IV */
 105
 106         unsigned long last_rx;
 107         u32 supp_rates; /* bitmap of supported rates in local->curr_rates */
 108         int txrate; /* index in local->curr_rates */
 109         int last_txrate; /* last rate used to send a frame to this STA */
 110         int last_nonerp_idx;
 111
 112         struct net_device *dev; /* which net device is this station associated
 113                                  * to */
 114
 115         struct ieee80211_key *key;
 116
 117         u32 tx_num_consecutive_failures;
 118         u32 tx_num_mpdu_ok;
 119         u32 tx_num_mpdu_fail;
 120
 121         struct rate_control_ref *rate_ctrl;
 122         void *rate_ctrl_priv;
 123
 124         /* last received seq/frag number from this STA (per RX queue) */
 125         __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
 126         unsigned long num_duplicates; /* number of duplicate frames received
 127                                        * from this STA */
 128         unsigned long tx_fragments; /* number of transmitted MPDUs */
 129         unsigned long rx_fragments; /* number of received MPDUs */
 130         unsigned long rx_dropped; /* number of dropped MPDUs from this STA */
 131
 132         int last_rssi; /* RSSI of last received frame from this STA */
 133         int last_signal; /* signal of last received frame from this STA */
 134         int last_noise; /* noise of last received frame from this STA */
 135         int last_ack_rssi[3]; /* RSSI of last received ACKs from this STA */
 136         unsigned long last_ack;
 137         int channel_use;
 138         int channel_use_raw;
 139
 140 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 141         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
 142         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
 143 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 144
 145         u16 listen_interval;
 146
 147         struct ieee80211_ht_info ht_info; /* 802.11n HT capabilities
 148                                              of this STA */
 149         struct sta_ampdu_mlme ampdu_mlme;
 150         u8 timer_to_tid[STA_TID_NUM];   /* convert timer id to tid */
 151
 152 #ifdef CONFIG_MAC80211_DEBUGFS
 153         struct sta_info_debugfsdentries {
 154                 struct dentry *dir;
 155                 struct dentry *flags;
 156                 struct dentry *num_ps_buf_frames;
 157                 struct dentry *last_ack_rssi;
 158                 struct dentry *last_ack_ms;
 159                 struct dentry *inactive_ms;
 160                 struct dentry *last_seq_ctrl;
 161 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 162                 struct dentry *wme_rx_queue;
 163                 struct dentry *wme_tx_queue;
 164 #endif
 165         } debugfs;
 166 #endif
 167 };
 168
 169
 170 /* Maximum number of concurrently registered stations */
 171 #define MAX_STA_COUNT 2007
 172
 173 #define STA_HASH_SIZE 256
 174 #define STA_HASH(sta) (sta[5])
 175
 176
 177 /* Maximum number of frames to buffer per power saving station */
 178 #define STA_MAX_TX_BUFFER 128
 179
 180 /* Minimum buffered frame expiry time. If STA uses listen interval that is
 181  * smaller than this value, the minimum value here is used instead. */
 182 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
 183
 184 /* How often station data is cleaned up (e.g., expiration of buffered frames)
 185  */
 186 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
 187
 188 static inline void __sta_info_get(struct sta_info *sta)
 189 {
 190         kref_get(&sta->kref);
 191 }
 192
 193 struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr);
 194 int sta_info_min_txrate_get(struct ieee80211_local *local);
 195 void sta_info_put(struct sta_info *sta);
 196 struct sta_info * sta_info_add(struct ieee80211_local *local,
 197                                struct net_device *dev, u8 *addr, gfp_t gfp);
 198 void sta_info_remove(struct sta_info *sta);
 199 void sta_info_free(struct sta_info *sta);
 200 void sta_info_init(struct ieee80211_local *local);
 201 int sta_info_start(struct ieee80211_local *local);
 202 void sta_info_stop(struct ieee80211_local *local);
 203 void sta_info_remove_aid_ptr(struct sta_info *sta);
 204 void sta_info_flush(struct ieee80211_local *local, struct net_device *dev);
 205
 206 #endif /* STA_INFO_H */