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
  35 struct sta_info {
  36         struct kref kref;
  37         struct list_head list;
  38         struct sta_info *hnext; /* next entry in hash table list */
  39
  40         struct ieee80211_local *local;
  41
  42         u8 addr[ETH_ALEN];
  43         u16 aid; /* STA's unique AID (1..2007), 0 = not yet assigned */
  44         u32 flags; /* WLAN_STA_ */
  45
  46         struct sk_buff_head ps_tx_buf; /* buffer of TX frames for station in
  47                                         * power saving state */
  48         int pspoll; /* whether STA has send a PS Poll frame */
  49         struct sk_buff_head tx_filtered; /* buffer of TX frames that were
  50                                           * already given to low-level driver,
  51                                           * but were filtered */
  52         int clear_dst_mask;
  53
  54         unsigned long rx_packets, tx_packets; /* number of RX/TX MSDUs */
  55         unsigned long rx_bytes, tx_bytes;
  56         unsigned long tx_retry_failed, tx_retry_count;
  57         unsigned long tx_filtered_count;
  58
  59         unsigned int wep_weak_iv_count; /* number of RX frames with weak IV */
  60
  61         unsigned long last_rx;
  62         u32 supp_rates; /* bitmap of supported rates in local->curr_rates */
  63         int txrate; /* index in local->curr_rates */
  64         int last_txrate; /* last rate used to send a frame to this STA */
  65         int last_nonerp_idx;
  66
  67         struct net_device *dev; /* which net device is this station associated
  68                                  * to */
  69
  70         struct ieee80211_key *key;
  71
  72         u32 tx_num_consecutive_failures;
  73         u32 tx_num_mpdu_ok;
  74         u32 tx_num_mpdu_fail;
  75
  76         struct rate_control_ref *rate_ctrl;
  77         void *rate_ctrl_priv;
  78
  79         /* last received seq/frag number from this STA (per RX queue) */
  80         __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
  81         unsigned long num_duplicates; /* number of duplicate frames received
  82                                        * from this STA */
  83         unsigned long tx_fragments; /* number of transmitted MPDUs */
  84         unsigned long rx_fragments; /* number of received MPDUs */
  85         unsigned long rx_dropped; /* number of dropped MPDUs from this STA */
  86
  87         int last_rssi; /* RSSI of last received frame from this STA */
  88         int last_signal; /* signal of last received frame from this STA */
  89         int last_noise; /* noise of last received frame from this STA */
  90         int last_ack_rssi[3]; /* RSSI of last received ACKs from this STA */
  91         unsigned long last_ack;
  92         int channel_use;
  93         int channel_use_raw;
  94
  95 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
  96         unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
  97         unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
  98 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
  99
 100         u16 listen_interval;
 101
 102 #ifdef CONFIG_MAC80211_DEBUGFS
 103         struct sta_info_debugfsdentries {
 104                 struct dentry *dir;
 105                 struct dentry *flags;
 106                 struct dentry *num_ps_buf_frames;
 107                 struct dentry *last_ack_rssi;
 108                 struct dentry *last_ack_ms;
 109                 struct dentry *inactive_ms;
 110                 struct dentry *last_seq_ctrl;
 111 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 112                 struct dentry *wme_rx_queue;
 113                 struct dentry *wme_tx_queue;
 114 #endif
 115         } debugfs;
 116 #endif
 117 };
 118
 119
 120 /* Maximum number of concurrently registered stations */
 121 #define MAX_STA_COUNT 2007
 122
 123 #define STA_HASH_SIZE 256
 124 #define STA_HASH(sta) (sta[5])
 125
 126
 127 /* Maximum number of frames to buffer per power saving station */
 128 #define STA_MAX_TX_BUFFER 128
 129
 130 /* Minimum buffered frame expiry time. If STA uses listen interval that is
 131  * smaller than this value, the minimum value here is used instead. */
 132 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
 133
 134 /* How often station data is cleaned up (e.g., expiration of buffered frames)
 135  */
 136 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
 137
 138 static inline void __sta_info_get(struct sta_info *sta)
 139 {
 140         kref_get(&sta->kref);
 141 }
 142
 143 struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr);
 144 int sta_info_min_txrate_get(struct ieee80211_local *local);
 145 void sta_info_put(struct sta_info *sta);
 146 struct sta_info * sta_info_add(struct ieee80211_local *local,
 147                                struct net_device *dev, u8 *addr, gfp_t gfp);
 148 void sta_info_remove(struct sta_info *sta);
 149 void sta_info_free(struct sta_info *sta);
 150 void sta_info_init(struct ieee80211_local *local);
 151 int sta_info_start(struct ieee80211_local *local);
 152 void sta_info_stop(struct ieee80211_local *local);
 153 void sta_info_remove_aid_ptr(struct sta_info *sta);
 154 void sta_info_flush(struct ieee80211_local *local, struct net_device *dev);
 155
 156 #endif /* STA_INFO_H */