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mac80211: Drop DS Channel PARAM in directed probe

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Do not send DS Channel parameter for directed probe requests
in order to maximize the chance that we get a response.  Some
badly-behaved APs don't respond when this parameter is included.

Signed-off-by: Paul Stewart <pstew@chromium.org>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Paul Stewart
2011-06-23 09:00:11 -08:00
committed by John W. Linville
parent ce2dd3c2d5
commit a806c558e0
5 changed files with 26 additions and 11 deletions
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21
net/mac80211/util.c
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@@ -1018,7 +1018,8 @@ int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
u8 *dst,
const u8 *ssid, size_t ssid_len,
const u8 *ie, size_t ie_len)
const u8 *ie, size_t ie_len,
bool directed)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
@@ -1035,8 +1036,16 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
return NULL;
}
chan = ieee80211_frequency_to_channel(
local->hw.conf.channel->center_freq);
/*
* Do not send DS Channel parameter for directed probe requests
* in order to maximize the chance that we get a response. Some
* badly-behaved APs don't respond when this parameter is included.
*/
if (directed)
chan = 0;
else
chan = ieee80211_frequency_to_channel(
local->hw.conf.channel->center_freq);
buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
local->hw.conf.channel->band,
@@ -1062,11 +1071,13 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
const u8 *ssid, size_t ssid_len,
const u8 *ie, size_t ie_len)
const u8 *ie, size_t ie_len,
bool directed)
{
struct sk_buff *skb;
skb = ieee80211_build_probe_req(sdata, dst, ssid, ssid_len, ie, ie_len);
skb = ieee80211_build_probe_req(sdata, dst, ssid, ssid_len, ie, ie_len,
directed);
if (skb)
ieee80211_tx_skb(sdata, skb);
}