From: Liad Kaufman <[email protected]> Adding a timeout for tearing down a TDLS connection that hasn't had ACKed traffic sent through it for a certain amount of time.
Since we have no other monitoring facility to indicate the existance (or non-existance) of a peer, this patch will cause a peer to be considered as unavailable if for some X time at least some Y packets have all not been ACKed. Signed-off-by: Liad Kaufman <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> --- net/mac80211/sta_info.h | 3 +++ net/mac80211/status.c | 21 ++++++++++++++++++++- 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index edd6b88..cfabdde 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -449,6 +449,9 @@ struct sta_info { enum ieee80211_smps_mode known_smps_mode; const struct ieee80211_cipher_scheme *cipher_scheme; + /* TDLS timeout data */ + unsigned long last_tdls_pkt_time; + /* keep last! */ struct ieee80211_sta sta; }; diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 2800e1c..89290e3 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -538,6 +538,8 @@ static void ieee80211_tx_latency_end_msrmnt(struct ieee80211_local *local, * - current throughput (higher value for higher tpt)? */ #define STA_LOST_PKT_THRESHOLD 50 +#define STA_LOST_TDLS_PKT_THRESHOLD 10 +#define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb) { @@ -548,7 +550,20 @@ static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb) !(info->flags & IEEE80211_TX_STAT_AMPDU)) return; - if (++sta->lost_packets < STA_LOST_PKT_THRESHOLD) + sta->lost_packets++; + if (!sta->sta.tdls && sta->lost_packets < STA_LOST_PKT_THRESHOLD) + return; + + /* + * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD + * of the last packets were lost, and that no ACK was received in the + * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss + * mechanism. + */ + if (sta->sta.tdls && + (sta->lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || + time_before(jiffies, + sta->last_tdls_pkt_time + STA_LOST_TDLS_PKT_TIME))) return; cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, @@ -695,6 +710,10 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) if (info->flags & IEEE80211_TX_STAT_ACK) { if (sta->lost_packets) sta->lost_packets = 0; + + /* Track when last TDLS packet was ACKed */ + if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) + sta->last_tdls_pkt_time = jiffies; } else { ieee80211_lost_packet(sta, skb); } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
