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mac80211: add block ack request capability 

This patch adds block ack request capability

Signed-off-by: Ester Kummer <ester.kummer@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ron Rindjunsky 2008-07-01 14:16:03 +03:00 committed by John W. Linville
parent b2898a2780
commit 429a380571
5 changed files with 56 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/ieee80211.h
View File

@ -658,6 +658,10 @@ struct ieee80211_bar {
__le16 start_seq_num;
} __attribute__((packed));
/* 802.11 BAR control masks */
#define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL 0x0000
#define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA 0x0004
/**
* struct ieee80211_ht_cap - HT capabilities
*

3
include/net/mac80211.h
View File

@ -235,6 +235,8 @@ struct ieee80211_bss_conf {
* @IEEE80211_TX_STAT_ACK: Frame was acknowledged
* @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
* is for the whole aggregation.
* @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
* so consider using block ack request (BAR).
*/
enum mac80211_tx_control_flags {
IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
@ -260,6 +262,7 @@ enum mac80211_tx_control_flags {
IEEE80211_TX_STAT_TX_FILTERED = BIT(20),
IEEE80211_TX_STAT_ACK = BIT(21),
IEEE80211_TX_STAT_AMPDU = BIT(22),
IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23),
};

1
net/mac80211/ieee80211_i.h
View File

@ -904,6 +904,7 @@ void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
u16 agg_size, u16 timeout);
void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
u16 initiator, u16 reason_code);
void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn);
void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *da,
u16 tid, u16 initiator, u16 reason);

21
net/mac80211/main.c
View File

@ -1404,14 +1404,15 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
u16 frag, type;
__le16 fc;
struct ieee80211_tx_status_rtap_hdr *rthdr;
struct ieee80211_sub_if_data *sdata;
struct net_device *prev_dev = NULL;
struct sta_info *sta;
rcu_read_lock();
if (info->status.excessive_retries) {
struct sta_info *sta;
sta = sta_info_get(local, hdr->addr1);
if (sta) {
if (test_sta_flags(sta, WLAN_STA_PS)) {
@ -1426,8 +1427,24 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
}
}
fc = hdr->frame_control;
if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
(ieee80211_is_data_qos(fc))) {
u16 tid, ssn;
u8 *qc;
sta = sta_info_get(local, hdr->addr1);
if (sta) {
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & 0xf;
ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
& IEEE80211_SCTL_SEQ);
ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
tid, ssn);
}
}
if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
struct sta_info *sta;
sta = sta_info_get(local, hdr->addr1);
if (sta) {
ieee80211_handle_filtered_frame(local, sta, skb);

29
net/mac80211/mlme.c
View File

@ -1536,6 +1536,35 @@ void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
ieee80211_sta_tx(dev, skb, 0);
}
void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sk_buff *skb;
struct ieee80211_bar *bar;
u16 bar_control = 0;
skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
if (!skb) {
printk(KERN_ERR "%s: failed to allocate buffer for "
"bar frame\n", dev->name);
return;
}
skb_reserve(skb, local->hw.extra_tx_headroom);
bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
memset(bar, 0, sizeof(*bar));
bar->frame_control = IEEE80211_FC(IEEE80211_FTYPE_CTL,
IEEE80211_STYPE_BACK_REQ);
memcpy(bar->ra, ra, ETH_ALEN);
memcpy(bar->ta, dev->dev_addr, ETH_ALEN);
bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
bar_control |= (u16)(tid << 12);
bar->control = cpu_to_le16(bar_control);
bar->start_seq_num = cpu_to_le16(ssn);
ieee80211_sta_tx(dev, skb, 0);
}
void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
u16 initiator, u16 reason)
{