2 * Copyright 2002-2005, Devicescape Software, Inc.
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.
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"
19 * enum ieee80211_sta_info_flags - Stations flags
21 * These flags are used with &struct sta_info's @flags member.
23 * @WLAN_STA_AUTH: Station is authenticated.
24 * @WLAN_STA_ASSOC: Station is associated.
25 * @WLAN_STA_PS: Station is in power-save mode
26 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
27 * This bit is always checked so needs to be enabled for all stations
28 * when virtual port control is not in use.
29 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
31 * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP.
32 * @WLAN_STA_WME: Station is a QoS-STA.
33 * @WLAN_STA_WDS: Station is one of our WDS peers.
34 * @WLAN_STA_PSPOLL: Station has just PS-polled us.
35 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
36 * IEEE80211_TXCTL_CLEAR_PS_FILT control flag) when the next
37 * frame to this station is transmitted.
39 enum ieee80211_sta_info_flags
{
41 WLAN_STA_ASSOC
= 1<<1,
43 WLAN_STA_AUTHORIZED
= 1<<3,
44 WLAN_STA_SHORT_PREAMBLE
= 1<<4,
45 WLAN_STA_ASSOC_AP
= 1<<5,
48 WLAN_STA_PSPOLL
= 1<<8,
49 WLAN_STA_CLEAR_PS_FILT
= 1<<9,
52 #define STA_TID_NUM 16
53 #define ADDBA_RESP_INTERVAL HZ
54 #define HT_AGG_MAX_RETRIES (0x3)
56 #define HT_AGG_STATE_INITIATOR_SHIFT (4)
58 #define HT_ADDBA_REQUESTED_MSK BIT(0)
59 #define HT_ADDBA_DRV_READY_MSK BIT(1)
60 #define HT_ADDBA_RECEIVED_MSK BIT(2)
61 #define HT_AGG_STATE_REQ_STOP_BA_MSK BIT(3)
62 #define HT_AGG_STATE_INITIATOR_MSK BIT(HT_AGG_STATE_INITIATOR_SHIFT)
63 #define HT_AGG_STATE_IDLE (0x0)
64 #define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \
65 HT_ADDBA_DRV_READY_MSK | \
66 HT_ADDBA_RECEIVED_MSK)
69 * struct tid_ampdu_tx - TID aggregation information (Tx).
71 * @state: TID's state in session state machine.
72 * @dialog_token: dialog token for aggregation session
73 * @ssn: Starting Sequence Number expected to be aggregated.
74 * @addba_resp_timer: timer for peer's response to addba request
75 * @addba_req_num: number of times addBA request has been sent.
81 struct timer_list addba_resp_timer
;
86 * struct tid_ampdu_rx - TID aggregation information (Rx).
88 * @state: TID's state in session state machine.
89 * @dialog_token: dialog token for aggregation session
90 * @ssn: Starting Sequence Number expected to be aggregated.
91 * @buf_size: buffer size for incoming A-MPDUs
92 * @timeout: reset timer value.
93 * @head_seq_num: head sequence number in reordering buffer.
94 * @stored_mpdu_num: number of MPDUs in reordering buffer
95 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
96 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
106 struct sk_buff
**reorder_buf
;
107 struct timer_list session_timer
;
121 * struct sta_ampdu_mlme - STA aggregation information.
123 * @tid_rx: aggregation info for Rx per TID
124 * @tid_tx: aggregation info for Tx per TID
125 * @ampdu_rx: for locking sections in aggregation Rx flow
126 * @ampdu_tx: for locking sectionsi in aggregation Tx flow
127 * @dialog_token_allocator: dialog token enumerator for each new session;
129 struct sta_ampdu_mlme
{
130 struct tid_ampdu_rx tid_rx
[STA_TID_NUM
];
131 struct tid_ampdu_tx tid_tx
[STA_TID_NUM
];
134 u8 dialog_token_allocator
;
139 struct list_head list
;
140 struct sta_info
*hnext
; /* next entry in hash table list */
142 struct ieee80211_local
*local
;
145 u16 aid
; /* STA's unique AID (1..2007), 0 = not yet assigned */
146 u32 flags
; /* WLAN_STA_ */
148 struct sk_buff_head ps_tx_buf
; /* buffer of TX frames for station in
149 * power saving state */
150 struct sk_buff_head tx_filtered
; /* buffer of TX frames that were
151 * already given to low-level driver,
152 * but were filtered */
153 unsigned long rx_packets
, tx_packets
; /* number of RX/TX MSDUs */
154 unsigned long rx_bytes
, tx_bytes
;
155 unsigned long tx_retry_failed
, tx_retry_count
;
156 unsigned long tx_filtered_count
;
157 /* moving percentage of failed MSDUs */
158 unsigned int fail_avg
;
160 unsigned int wep_weak_iv_count
; /* number of RX frames with weak IV */
162 unsigned long last_rx
;
163 /* bitmap of supported rates per band */
164 u64 supp_rates
[IEEE80211_NUM_BANDS
];
166 /* last rates used to send a frame to this STA */
167 int last_txrate_idx
, last_nonerp_txrate_idx
;
169 struct net_device
*dev
; /* which net device is this station associated
172 struct ieee80211_key
*key
;
174 u32 tx_num_consecutive_failures
;
176 u32 tx_num_mpdu_fail
;
178 struct rate_control_ref
*rate_ctrl
;
179 void *rate_ctrl_priv
;
181 /* last received seq/frag number from this STA (per RX queue) */
182 __le16 last_seq_ctrl
[NUM_RX_DATA_QUEUES
];
183 unsigned long num_duplicates
; /* number of duplicate frames received
185 unsigned long tx_fragments
; /* number of transmitted MPDUs */
186 unsigned long rx_fragments
; /* number of received MPDUs */
187 unsigned long rx_dropped
; /* number of dropped MPDUs from this STA */
189 int last_rssi
; /* RSSI of last received frame from this STA */
190 int last_signal
; /* signal of last received frame from this STA */
191 int last_noise
; /* noise of last received frame from this STA */
195 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
196 unsigned int wme_rx_queue
[NUM_RX_DATA_QUEUES
];
197 unsigned int wme_tx_queue
[NUM_RX_DATA_QUEUES
];
198 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
202 struct ieee80211_ht_info ht_info
; /* 802.11n HT capabilities
204 struct sta_ampdu_mlme ampdu_mlme
;
205 u8 timer_to_tid
[STA_TID_NUM
]; /* convert timer id to tid */
206 u8 tid_to_tx_q
[STA_TID_NUM
]; /* map tid to tx queue */
207 #ifdef CONFIG_MAC80211_MESH
208 /* mesh peer link attributes */
209 __le16 llid
; /* Local link ID */
210 __le16 plid
; /* Peer link ID */
211 __le16 reason
; /* Buffer for cancel reason on HOLDING state */
212 enum plink_state plink_state
;
214 struct timer_list plink_timer
;
215 u8 plink_retries
; /* Retries in establishment */
216 bool ignore_plink_timer
;
217 spinlock_t plink_lock
; /* For peer_state reads / updates and other
218 updates in the structure. Ensures robust
219 transitions for the peerlink FSM */
222 #ifdef CONFIG_MAC80211_DEBUGFS
223 struct sta_info_debugfsdentries
{
225 struct dentry
*flags
;
226 struct dentry
*num_ps_buf_frames
;
227 struct dentry
*inactive_ms
;
228 struct dentry
*last_seq_ctrl
;
229 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
230 struct dentry
*wme_rx_queue
;
231 struct dentry
*wme_tx_queue
;
233 struct dentry
*agg_status
;
238 static inline enum plink_state
sta_plink_state(struct sta_info
*sta
)
240 #ifdef CONFIG_MAC80211_MESH
241 return sta
->plink_state
;
247 /* Maximum number of concurrently registered stations */
248 #define MAX_STA_COUNT 2007
250 #define STA_HASH_SIZE 256
251 #define STA_HASH(sta) (sta[5])
254 /* Maximum number of frames to buffer per power saving station */
255 #define STA_MAX_TX_BUFFER 128
257 /* Minimum buffered frame expiry time. If STA uses listen interval that is
258 * smaller than this value, the minimum value here is used instead. */
259 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
261 /* How often station data is cleaned up (e.g., expiration of buffered frames)
263 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
265 static inline void __sta_info_get(struct sta_info
*sta
)
267 kref_get(&sta
->kref
);
270 struct sta_info
* sta_info_get(struct ieee80211_local
*local
, u8
*addr
);
271 struct sta_info
*sta_info_get_by_idx(struct ieee80211_local
*local
, int idx
,
272 struct net_device
*dev
);
273 void sta_info_put(struct sta_info
*sta
);
274 struct sta_info
*sta_info_add(struct ieee80211_local
*local
,
275 struct net_device
*dev
, u8
*addr
, gfp_t gfp
);
276 void sta_info_remove(struct sta_info
*sta
);
277 void sta_info_free(struct sta_info
*sta
);
278 void sta_info_init(struct ieee80211_local
*local
);
279 int sta_info_start(struct ieee80211_local
*local
);
280 void sta_info_stop(struct ieee80211_local
*local
);
281 void sta_info_flush(struct ieee80211_local
*local
, struct net_device
*dev
);
283 void sta_info_set_tim_bit(struct sta_info
*sta
);
284 void sta_info_clear_tim_bit(struct sta_info
*sta
);
286 #endif /* STA_INFO_H */