Commit 691eb61b authored Jan 24, 2014 by Simon Wunderlich Committed by Johannes Berg Feb 04, 2014

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>

parent ea73cbce

net/mac80211/ibss.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}

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