| STRUCT STA_INFO(9) | Internals | STRUCT STA_INFO(9) |
NAME¶
struct_sta_info - STA information
SYNOPSIS¶
struct sta_info {
struct list_head list;
struct list_head free_list;
struct rcu_head rcu_head;
struct sta_info __rcu * hnext;
u8 addr[ETH_ALEN];
struct ieee80211_local * local;
struct ieee80211_sub_if_data * sdata;
struct ieee80211_key __rcu * gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
struct ieee80211_key __rcu * ptk[NUM_DEFAULT_KEYS];
u8 ptk_idx;
struct rate_control_ref * rate_ctrl;
void * rate_ctrl_priv;
spinlock_t rate_ctrl_lock;
spinlock_t lock;
struct ieee80211_fast_tx __rcu * fast_tx;
#ifdef CONFIG_MAC80211_MESH
struct mesh_sta * mesh;
#endif
struct work_struct drv_deliver_wk;
u16 listen_interval;
bool dead;
bool uploaded;
enum ieee80211_sta_state sta_state;
unsigned long _flags;
spinlock_t ps_lock;
struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
unsigned long driver_buffered_tids;
unsigned long txq_buffered_tids;
unsigned long rx_packets;
u64 rx_bytes;
unsigned long last_rx;
long last_connected;
unsigned long num_duplicates;
unsigned long rx_fragments;
unsigned long rx_dropped;
int last_signal;
struct ewma_signal avg_signal;
int last_ack_signal;
u8 chains;
s8 chain_signal_last[IEEE80211_MAX_CHAINS];
struct ewma_signal chain_signal_avg[IEEE80211_MAX_CHAINS];
__le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
unsigned long tx_filtered_count;
unsigned long tx_retry_failed;
unsigned long tx_retry_count;
u64 tx_packets[IEEE80211_NUM_ACS];
u64 tx_bytes[IEEE80211_NUM_ACS];
struct ieee80211_tx_rate last_tx_rate;
int last_rx_rate_idx;
u32 last_rx_rate_flag;
u32 last_rx_rate_vht_flag;
u8 last_rx_rate_vht_nss;
u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
u64 tx_msdu[IEEE80211_NUM_TIDS + 1];
u64 tx_msdu_retries[IEEE80211_NUM_TIDS + 1];
u64 tx_msdu_failed[IEEE80211_NUM_TIDS + 1];
u64 rx_msdu[IEEE80211_NUM_TIDS + 1];
struct sta_ampdu_mlme ampdu_mlme;
u8 timer_to_tid[IEEE80211_NUM_TIDS];
#ifdef CONFIG_MAC80211_DEBUGFS
struct sta_info_debugfsdentries debugfs;
#endif
enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
unsigned int lost_packets;
unsigned int beacon_loss_count;
enum ieee80211_smps_mode known_smps_mode;
const struct ieee80211_cipher_scheme * cipher_scheme;
unsigned long last_tdls_pkt_time;
u8 reserved_tid;
struct cfg80211_chan_def tdls_chandef;
struct ieee80211_sta sta;
};
MEMBERS¶
list
global linked list entry
free_list
list entry for keeping track of stations to free
rcu_head
RCU head used for freeing this station struct
hnext
hash table linked list pointer
addr[ETH_ALEN]
station´s MAC address - duplicated from public
part to let the hash table work with just a single cacheline
local
pointer to the global information
sdata
virtual interface this station belongs to
gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]
group keys negotiated with this station, if any
ptk[NUM_DEFAULT_KEYS]
peer keys negotiated with this station, if any
ptk_idx
last installed peer key index
rate_ctrl
rate control algorithm reference
rate_ctrl_priv
rate control private per-STA pointer
rate_ctrl_lock
spinlock used to protect rate control data (data inside
the algorithm, so serializes calls there)
lock
used for locking all fields that require locking, see
comments in the header file.
fast_tx
TX fastpath information
mesh
mesh STA information
drv_deliver_wk
used for delivering frames after driver PS
unblocking
listen_interval
listen interval of this station, when we´re acting
as AP
dead
set to true when sta is unlinked
uploaded
set to true when sta is uploaded to the driver
sta_state
duplicates information about station state (for
debug)
_flags
STA flags, see enum ieee80211_sta_info_flags, do not use
directly
ps_lock
used for powersave (when mac80211 is the AP) related
locking
ps_tx_buf[IEEE80211_NUM_ACS]
buffers (per AC) of frames to transmit to this station
when it leaves power saving state or polls
tx_filtered[IEEE80211_NUM_ACS]
buffers (per AC) of frames we already tried to transmit
but were filtered by hardware due to STA having entered power saving state,
these are also delivered to the station when it leaves powersave or polls for
frames
driver_buffered_tids
bitmap of TIDs the driver has data buffered on
txq_buffered_tids
bitmap of TIDs that mac80211 has txq data buffered
on
rx_packets
Number of MSDUs received from this STA
rx_bytes
Number of bytes received from this STA
last_rx
time (in jiffies) when last frame was received from this
STA
last_connected
time (in seconds) when a station got connected
num_duplicates
number of duplicate frames received from this STA
rx_fragments
number of received MPDUs
rx_dropped
number of dropped MPDUs from this STA
last_signal
signal of last received frame from this STA
avg_signal
moving average of signal of received frames from this
STA
last_ack_signal
signal of last received Ack frame from this STA
chains
chains ever used for RX from this station
chain_signal_last[IEEE80211_MAX_CHAINS]
last signal (per chain)
chain_signal_avg[IEEE80211_MAX_CHAINS]
signal average (per chain)
last_seq_ctrl[IEEE80211_NUM_TIDS + 1]
last received seq/frag number from this STA (per TID plus
one for non-QoS frames)
tx_filtered_count
number of frames the hardware filtered for this STA
tx_retry_failed
number of frames that failed retry
tx_retry_count
total number of retries for frames to this STA
tx_packets[IEEE80211_NUM_ACS]
number of RX/TX MSDUs
tx_bytes[IEEE80211_NUM_ACS]
number of bytes transmitted to this STA
last_tx_rate
rate used for last transmit, to report to userspace as
“the” transmit rate
last_rx_rate_idx
rx status rate index of the last data packet
last_rx_rate_flag
rx status flag of the last data packet
last_rx_rate_vht_flag
rx status vht flag of the last data packet
last_rx_rate_vht_nss
rx status nss of last data packet
tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]
per-TID sequence numbers for sending to this STA
tx_msdu[IEEE80211_NUM_TIDS + 1]
MSDUs transmitted to this station, using
IEEE80211_NUM_TID entry for non-QoS frames
tx_msdu_retries[IEEE80211_NUM_TIDS + 1]
MSDU retries for transmissions to to this station, using
IEEE80211_NUM_TID entry for non-QoS frames
tx_msdu_failed[IEEE80211_NUM_TIDS + 1]
MSDU failures for transmissions to to this station, using
IEEE80211_NUM_TID entry for non-QoS frames
rx_msdu[IEEE80211_NUM_TIDS + 1]
MSDUs received from this station, using IEEE80211_NUM_TID
entry for non-QoS frames
ampdu_mlme
A-MPDU state machine state
timer_to_tid[IEEE80211_NUM_TIDS]
identity mapping to ID timers
debugfs
debug filesystem info
cur_max_bandwidth
maximum bandwidth to use for TX to the station, taken
from HT/VHT capabilities or VHT operating mode notification
lost_packets
number of consecutive lost packets
beacon_loss_count
number of times beacon loss has triggered
known_smps_mode
the smps_mode the client thinks we are in. Relevant for
AP only.
cipher_scheme
optional cipher scheme for this station
last_tdls_pkt_time
holds the time in jiffies of last TDLS pkt ACKed
reserved_tid
reserved TID (if any, otherwise
IEEE80211_TID_UNRESERVED)
tdls_chandef
a TDLS peer can have a wider chandef that is compatible
to the BSS one.
sta
station information we share with the driver
DESCRIPTION¶
This structure collects information about a station that mac80211 is communicating with.
AUTHOR¶
Johannes Berg <johannes@sipsolutions.net>
Author.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |