237 lines
7.4 KiB
C
237 lines
7.4 KiB
C
/*
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* Copyright 2002-2005, Devicescape Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef STA_INFO_H
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#define STA_INFO_H
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#include <linux/list.h>
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#include <linux/types.h>
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#include <linux/if_ether.h>
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#include <linux/kref.h>
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#include "ieee80211_key.h"
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/* Stations flags (struct sta_info::flags) */
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#define WLAN_STA_AUTH BIT(0)
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#define WLAN_STA_ASSOC BIT(1)
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#define WLAN_STA_PS BIT(2)
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#define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */
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#define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
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#define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
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* controlling whether STA is authorized to
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* send and receive non-IEEE 802.1X frames
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*/
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#define WLAN_STA_SHORT_PREAMBLE BIT(7)
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/* whether this is an AP that we are associated with as a client */
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#define WLAN_STA_ASSOC_AP BIT(8)
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#define WLAN_STA_WME BIT(9)
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#define WLAN_STA_WDS BIT(27)
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#define STA_TID_NUM 16
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#define ADDBA_RESP_INTERVAL HZ
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#define HT_AGG_MAX_RETRIES (0x3)
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#define HT_AGG_STATE_INITIATOR_SHIFT (4)
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#define HT_ADDBA_REQUESTED_MSK BIT(0)
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#define HT_ADDBA_DRV_READY_MSK BIT(1)
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#define HT_ADDBA_RECEIVED_MSK BIT(2)
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#define HT_AGG_STATE_REQ_STOP_BA_MSK BIT(3)
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#define HT_AGG_STATE_INITIATOR_MSK BIT(HT_AGG_STATE_INITIATOR_SHIFT)
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#define HT_AGG_STATE_IDLE (0x0)
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#define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \
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HT_ADDBA_DRV_READY_MSK | \
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HT_ADDBA_RECEIVED_MSK)
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/**
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* struct tid_ampdu_tx - TID aggregation information (Tx).
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*
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* @state: TID's state in session state machine.
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* @dialog_token: dialog token for aggregation session
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* @ssn: Starting Sequence Number expected to be aggregated.
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* @addba_resp_timer: timer for peer's response to addba request
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* @addba_req_num: number of times addBA request has been sent.
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*/
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struct tid_ampdu_tx {
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u8 state;
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u8 dialog_token;
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u16 ssn;
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struct timer_list addba_resp_timer;
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u8 addba_req_num;
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};
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/**
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* struct tid_ampdu_rx - TID aggregation information (Rx).
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*
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* @state: TID's state in session state machine.
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* @dialog_token: dialog token for aggregation session
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* @ssn: Starting Sequence Number expected to be aggregated.
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* @buf_size: buffer size for incoming A-MPDUs
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* @timeout: reset timer value.
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* @head_seq_num: head sequence number in reordering buffer.
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* @stored_mpdu_num: number of MPDUs in reordering buffer
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* @reorder_buf: buffer to reorder incoming aggregated MPDUs
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* @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
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*/
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struct tid_ampdu_rx {
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u8 state;
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u8 dialog_token;
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u16 ssn;
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u16 buf_size;
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u16 timeout;
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u16 head_seq_num;
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u16 stored_mpdu_num;
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struct sk_buff **reorder_buf;
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struct timer_list session_timer;
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};
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/**
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* struct sta_ampdu_mlme - STA aggregation information.
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*
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* @tid_rx: aggregation info for Rx per TID
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* @tid_tx: aggregation info for Tx per TID
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* @ampdu_rx: for locking sections in aggregation Rx flow
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* @ampdu_tx: for locking sectionsi in aggregation Tx flow
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* @dialog_token_allocator: dialog token enumerator for each new session;
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*/
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struct sta_ampdu_mlme {
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struct tid_ampdu_rx tid_rx[STA_TID_NUM];
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struct tid_ampdu_tx tid_tx[STA_TID_NUM];
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spinlock_t ampdu_rx;
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spinlock_t ampdu_tx;
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u8 dialog_token_allocator;
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};
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struct sta_info {
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struct kref kref;
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struct list_head list;
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struct sta_info *hnext; /* next entry in hash table list */
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struct ieee80211_local *local;
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u8 addr[ETH_ALEN];
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u16 aid; /* STA's unique AID (1..2007), 0 = not yet assigned */
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u32 flags; /* WLAN_STA_ */
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struct sk_buff_head ps_tx_buf; /* buffer of TX frames for station in
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* power saving state */
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int pspoll; /* whether STA has send a PS Poll frame */
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struct sk_buff_head tx_filtered; /* buffer of TX frames that were
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* already given to low-level driver,
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* but were filtered */
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int clear_dst_mask;
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unsigned long rx_packets, tx_packets; /* number of RX/TX MSDUs */
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unsigned long rx_bytes, tx_bytes;
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unsigned long tx_retry_failed, tx_retry_count;
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unsigned long tx_filtered_count;
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unsigned int wep_weak_iv_count; /* number of RX frames with weak IV */
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unsigned long last_rx;
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u32 supp_rates; /* bitmap of supported rates in local->curr_rates */
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int txrate; /* index in local->curr_rates */
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int last_txrate; /* last rate used to send a frame to this STA */
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int last_nonerp_idx;
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struct net_device *dev; /* which net device is this station associated
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* to */
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struct ieee80211_key *key;
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u32 tx_num_consecutive_failures;
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u32 tx_num_mpdu_ok;
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u32 tx_num_mpdu_fail;
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struct rate_control_ref *rate_ctrl;
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void *rate_ctrl_priv;
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/* last received seq/frag number from this STA (per RX queue) */
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__le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
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unsigned long num_duplicates; /* number of duplicate frames received
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* from this STA */
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unsigned long tx_fragments; /* number of transmitted MPDUs */
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unsigned long rx_fragments; /* number of received MPDUs */
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unsigned long rx_dropped; /* number of dropped MPDUs from this STA */
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int last_rssi; /* RSSI of last received frame from this STA */
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int last_signal; /* signal of last received frame from this STA */
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int last_noise; /* noise of last received frame from this STA */
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int last_ack_rssi[3]; /* RSSI of last received ACKs from this STA */
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unsigned long last_ack;
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int channel_use;
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int channel_use_raw;
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#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
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unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
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unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
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#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
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u16 listen_interval;
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struct ieee80211_ht_info ht_info; /* 802.11n HT capabilities
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of this STA */
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struct sta_ampdu_mlme ampdu_mlme;
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u8 timer_to_tid[STA_TID_NUM]; /* convert timer id to tid */
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u8 tid_to_tx_q[STA_TID_NUM]; /* map tid to tx queue */
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#ifdef CONFIG_MAC80211_DEBUGFS
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struct sta_info_debugfsdentries {
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struct dentry *dir;
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struct dentry *flags;
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struct dentry *num_ps_buf_frames;
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struct dentry *last_ack_rssi;
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struct dentry *last_ack_ms;
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struct dentry *inactive_ms;
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struct dentry *last_seq_ctrl;
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#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
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struct dentry *wme_rx_queue;
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struct dentry *wme_tx_queue;
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#endif
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} debugfs;
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#endif
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};
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/* Maximum number of concurrently registered stations */
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#define MAX_STA_COUNT 2007
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#define STA_HASH_SIZE 256
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#define STA_HASH(sta) (sta[5])
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/* Maximum number of frames to buffer per power saving station */
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#define STA_MAX_TX_BUFFER 128
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/* Minimum buffered frame expiry time. If STA uses listen interval that is
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* smaller than this value, the minimum value here is used instead. */
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#define STA_TX_BUFFER_EXPIRE (10 * HZ)
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/* How often station data is cleaned up (e.g., expiration of buffered frames)
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*/
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#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
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static inline void __sta_info_get(struct sta_info *sta)
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{
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kref_get(&sta->kref);
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}
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struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr);
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int sta_info_min_txrate_get(struct ieee80211_local *local);
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void sta_info_put(struct sta_info *sta);
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struct sta_info * sta_info_add(struct ieee80211_local *local,
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struct net_device *dev, u8 *addr, gfp_t gfp);
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void sta_info_remove(struct sta_info *sta);
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void sta_info_free(struct sta_info *sta);
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void sta_info_init(struct ieee80211_local *local);
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int sta_info_start(struct ieee80211_local *local);
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void sta_info_stop(struct ieee80211_local *local);
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void sta_info_remove_aid_ptr(struct sta_info *sta);
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void sta_info_flush(struct ieee80211_local *local, struct net_device *dev);
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#endif /* STA_INFO_H */
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