/* * Copyright 2002-2005, Devicescape Software, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef STA_INFO_H #define STA_INFO_H #include <linux/list.h> #include <linux/types.h> #include <linux/if_ether.h> #include "key.h" /** * enum ieee80211_sta_info_flags - Stations flags * * These flags are used with &struct sta_info's @flags member. * * @WLAN_STA_AUTH: Station is authenticated. * @WLAN_STA_ASSOC: Station is associated. * @WLAN_STA_PS: Station is in power-save mode * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. * This bit is always checked so needs to be enabled for all stations * when virtual port control is not in use. * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble * frames. * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP. * @WLAN_STA_WME: Station is a QoS-STA. * @WLAN_STA_WDS: Station is one of our WDS peers. * @WLAN_STA_PSPOLL: Station has just PS-polled us. * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the * IEEE80211_TXCTL_CLEAR_PS_FILT control flag) when the next * frame to this station is transmitted. */ enum ieee80211_sta_info_flags { WLAN_STA_AUTH = 1<<0, WLAN_STA_ASSOC = 1<<1, WLAN_STA_PS = 1<<2, WLAN_STA_AUTHORIZED = 1<<3, WLAN_STA_SHORT_PREAMBLE = 1<<4, WLAN_STA_ASSOC_AP = 1<<5, WLAN_STA_WME = 1<<6, WLAN_STA_WDS = 1<<7, WLAN_STA_PSPOLL = 1<<8, WLAN_STA_CLEAR_PS_FILT = 1<<9, }; #define STA_TID_NUM 16 #define ADDBA_RESP_INTERVAL HZ #define HT_AGG_MAX_RETRIES (0x3) #define HT_AGG_STATE_INITIATOR_SHIFT (4) #define HT_ADDBA_REQUESTED_MSK BIT(0) #define HT_ADDBA_DRV_READY_MSK BIT(1) #define HT_ADDBA_RECEIVED_MSK BIT(2) #define HT_AGG_STATE_REQ_STOP_BA_MSK BIT(3) #define HT_AGG_STATE_INITIATOR_MSK BIT(HT_AGG_STATE_INITIATOR_SHIFT) #define HT_AGG_STATE_IDLE (0x0) #define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \ HT_ADDBA_DRV_READY_MSK | \ HT_ADDBA_RECEIVED_MSK) #define HT_AGG_STATE_DEBUGFS_CTL BIT(7) /** * struct tid_ampdu_tx - TID aggregation information (Tx). * * @addba_resp_timer: timer for peer's response to addba request * @ssn: Starting Sequence Number expected to be aggregated. * @dialog_token: dialog token for aggregation session */ struct tid_ampdu_tx { struct timer_list addba_resp_timer; u16 ssn; u8 dialog_token; }; /** * struct tid_ampdu_rx - TID aggregation information (Rx). * * @reorder_buf: buffer to reorder incoming aggregated MPDUs * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) * @head_seq_num: head sequence number in reordering buffer. * @stored_mpdu_num: number of MPDUs in reordering buffer * @ssn: Starting Sequence Number expected to be aggregated. * @buf_size: buffer size for incoming A-MPDUs * @timeout: reset timer value. * @dialog_token: dialog token for aggregation session */ struct tid_ampdu_rx { struct sk_buff **reorder_buf; struct timer_list session_timer; u16 head_seq_num; u16 stored_mpdu_num; u16 ssn; u16 buf_size; u16 timeout; u8 dialog_token; }; /** * enum plink_state - state of a mesh peer link finite state machine * * @PLINK_LISTEN: initial state, considered the implicit state of non existant * mesh peer links * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh peer * @PLINK_OPN_RCVD: mesh plink open frame has been received from this mesh peer * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from this mesh * peer * @PLINK_ESTAB: mesh peer link is established * @PLINK_HOLDING: mesh peer link is being closed or cancelled * @PLINK_BLOCKED: all frames transmitted from this mesh plink are discarded */ enum plink_state { PLINK_LISTEN, PLINK_OPN_SNT, PLINK_OPN_RCVD, PLINK_CNF_RCVD, PLINK_ESTAB, PLINK_HOLDING, PLINK_BLOCKED }; /** * struct sta_ampdu_mlme - STA aggregation information. * * @tid_state_rx: TID's state in Rx session state machine. * @tid_rx: aggregation info for Rx per TID * @ampdu_rx: for locking sections in aggregation Rx flow * @tid_state_tx: TID's state in Tx session state machine. * @tid_tx: aggregation info for Tx per TID * @addba_req_num: number of times addBA request has been sent. * @ampdu_tx: for locking sectionsi in aggregation Tx flow * @dialog_token_allocator: dialog token enumerator for each new session; */ struct sta_ampdu_mlme { /* rx */ u8 tid_state_rx[STA_TID_NUM]; struct tid_ampdu_rx *tid_rx[STA_TID_NUM]; spinlock_t ampdu_rx; /* tx */ u8 tid_state_tx[STA_TID_NUM]; struct tid_ampdu_tx *tid_tx[STA_TID_NUM]; u8 addba_req_num[STA_TID_NUM]; spinlock_t ampdu_tx; u8 dialog_token_allocator; }; /* see __sta_info_unlink */ #define STA_INFO_PIN_STAT_NORMAL 0 #define STA_INFO_PIN_STAT_PINNED 1 #define STA_INFO_PIN_STAT_DESTROY 2 /** * struct sta_info - STA information * * This structure collects information about a station that * mac80211 is communicating with. * * @list: global linked list entry * @hnext: hash table linked list pointer * @local: pointer to the global information * @addr: MAC address of this STA * @aid: STA's unique AID (1..2007, 0 = not assigned yet), * only used in AP (and IBSS?) mode * @flags: STA flags, see &enum ieee80211_sta_info_flags * @ps_tx_buf: buffer of frames to transmit to this station * when it leaves power saving state * @tx_filtered: buffer of frames we already tried to transmit * but were filtered by hardware due to STA having entered * power saving state * @rx_packets: Number of MSDUs received from this STA * @rx_bytes: Number of bytes received from this STA * @supp_rates: Bitmap of supported rates (per band) * @ht_info: HT capabilities of this STA */ struct sta_info { /* General information, mostly static */ struct list_head list; struct sta_info *hnext; struct ieee80211_local *local; struct ieee80211_sub_if_data *sdata; struct ieee80211_key *key; struct rate_control_ref *rate_ctrl; void *rate_ctrl_priv; struct ieee80211_ht_info ht_info; u64 supp_rates[IEEE80211_NUM_BANDS]; u8 addr[ETH_ALEN]; u16 aid; u16 listen_interval; /* * for use by the internal lifetime management, * see __sta_info_unlink */ u8 pin_status; /* frequently updated information, needs locking? */ u32 flags; /* * STA powersave frame queues, no more than the internal * locking required. */ struct sk_buff_head ps_tx_buf; struct sk_buff_head tx_filtered; /* Updated from RX path only, no locking requirements */ unsigned long rx_packets, rx_bytes; unsigned long wep_weak_iv_count; unsigned long last_rx; unsigned long num_duplicates; /* number of duplicate frames received * from this STA */ unsigned long rx_fragments; /* number of received MPDUs */ unsigned long rx_dropped; /* number of dropped MPDUs from this STA */ int last_rssi; /* RSSI of last received frame from this STA */ int last_signal; /* signal of last received frame from this STA */ int last_noise; /* noise of last received frame from this STA */ /* last received seq/frag number from this STA (per RX queue) */ __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES]; #ifdef CONFIG_MAC80211_DEBUG_COUNTERS unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES]; #endif /* Updated from TX status path only, no locking requirements */ unsigned long tx_filtered_count; unsigned long tx_retry_failed, tx_retry_count; /* TODO: update in generic code not rate control? */ u32 tx_num_consecutive_failures; u32 tx_num_mpdu_ok; u32 tx_num_mpdu_fail; /* moving percentage of failed MSDUs */ unsigned int fail_avg; /* Updated from TX path only, no locking requirements */ unsigned long tx_packets; /* number of RX/TX MSDUs */ unsigned long tx_bytes; unsigned long tx_fragments; /* number of transmitted MPDUs */ int txrate_idx; int last_txrate_idx; #ifdef CONFIG_MAC80211_DEBUG_COUNTERS unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES]; #endif /* Debug counters, no locking doesn't matter */ int channel_use; int channel_use_raw; /* * Aggregation information, comes with own locking. */ struct sta_ampdu_mlme ampdu_mlme; u8 timer_to_tid[STA_TID_NUM]; /* identity mapping to ID timers */ u8 tid_to_tx_q[STA_TID_NUM]; /* map tid to tx queue */ #ifdef CONFIG_MAC80211_MESH /* * Mesh peer link attributes * TODO: move to a sub-structure that is referenced with pointer? */ __le16 llid; /* Local link ID */ __le16 plid; /* Peer link ID */ __le16 reason; /* Cancel reason on PLINK_HOLDING state */ u8 plink_retries; /* Retries in establishment */ bool ignore_plink_timer; enum plink_state plink_state; u32 plink_timeout; struct timer_list plink_timer; spinlock_t plink_lock; /* For peer_state reads / updates and other updates in the structure. Ensures robust transitions for the peerlink FSM */ #endif #ifdef CONFIG_MAC80211_DEBUGFS struct sta_info_debugfsdentries { struct dentry *dir; struct dentry *flags; struct dentry *num_ps_buf_frames; struct dentry *inactive_ms; struct dentry *last_seq_ctrl; #ifdef CONFIG_MAC80211_DEBUG_COUNTERS struct dentry *wme_rx_queue; struct dentry *wme_tx_queue; #endif struct dentry *agg_status; } debugfs; #endif }; static inline enum plink_state sta_plink_state(struct sta_info *sta) { #ifdef CONFIG_MAC80211_MESH return sta->plink_state; #endif return PLINK_LISTEN; } /* Maximum number of concurrently registered stations */ #define MAX_STA_COUNT 2007 #define STA_HASH_SIZE 256 #define STA_HASH(sta) (sta[5]) /* Maximum number of frames to buffer per power saving station */ #define STA_MAX_TX_BUFFER 128 /* Minimum buffered frame expiry time. If STA uses listen interval that is * smaller than this value, the minimum value here is used instead. */ #define STA_TX_BUFFER_EXPIRE (10 * HZ) /* How often station data is cleaned up (e.g., expiration of buffered frames) */ #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) /* * Get a STA info, must have be under RCU read lock. */ struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr); /* * Get STA info by index, BROKEN! */ struct sta_info *sta_info_get_by_idx(struct ieee80211_local *local, int idx, struct net_device *dev); /* * Create a new STA info, caller owns returned structure * until sta_info_insert(). */ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr, gfp_t gfp); /* * Insert STA info into hash table/list, returns zero or a * -EEXIST if (if the same MAC address is already present). * * Calling this without RCU protection makes the caller * relinquish its reference to @sta. */ int sta_info_insert(struct sta_info *sta); /* * Unlink a STA info from the hash table/list. * This can NULL the STA pointer if somebody else * has already unlinked it. */ void sta_info_unlink(struct sta_info **sta); void __sta_info_unlink(struct sta_info **sta); void sta_info_destroy(struct sta_info *sta); void sta_info_set_tim_bit(struct sta_info *sta); void sta_info_clear_tim_bit(struct sta_info *sta); void sta_info_init(struct ieee80211_local *local); int sta_info_start(struct ieee80211_local *local); void sta_info_stop(struct ieee80211_local *local); int sta_info_flush(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata); void sta_info_flush_delayed(struct ieee80211_sub_if_data *sdata); #endif /* STA_INFO_H */