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mac80211: send ibss probe responses with noack flag 

Responding to probe requests for scanning clients will often create
excessive retries, as it happens quite often that the scanning client
already left the channel. Therefore do it like hostapd and send probe
responses for wildcard SSID only once by using the noack flag.

Signed-off-by: Simon Wunderlich <simon@open-mesh.com>
[fix typo & 'wildcard SSID' in commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Simon Wunderlich 2014-01-24 23:48:29 +01:00 committed by Johannes Berg
parent ea73cbce4e
commit 691eb61bcf
1 changed files with 5 additions and 0 deletions
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5
net/mac80211/ibss.c
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@ -1465,6 +1465,11 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN);
ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa);
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
/* avoid excessive retries for probe request to wildcard SSIDs */
if (pos[1] == 0)
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK;
ieee80211_tx_skb(sdata, skb);
}