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mac80211: Drop DS Channel PARAM in directed probe 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/mac80211/ieee80211_i.h
View File

@ -1350,10 +1350,12 @@ 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);
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);
void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
const size_t supp_rates_len,

5
net/mac80211/mlme.c
View File

@ -1204,7 +1204,8 @@ static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
ieee80211_send_nullfunc(sdata->local, sdata, 0);
} else {
ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0);
ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0,
true);
}
ifmgd->probe_send_count++;
@ -1289,7 +1290,7 @@ struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
ssid + 2, ssid[1], NULL, 0);
ssid + 2, ssid[1], NULL, 0, true);
return skb;
}

3
net/mac80211/scan.c
View File

@ -659,7 +659,8 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
sdata, NULL,
local->scan_req->ssids[i].ssid,
local->scan_req->ssids[i].ssid_len,
local->scan_req->ie, local->scan_req->ie_len);
local->scan_req->ie, local->scan_req->ie_len,
false);
/*
* After sending probe requests, wait for probe responses

21
net/mac80211/util.c
View File

@ -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);
}

2
net/mac80211/work.c
View File

@ -450,7 +450,7 @@ ieee80211_direct_probe(struct ieee80211_work *wk)
* will not answer to direct packet in unassociated state.
*/
ieee80211_send_probe_req(sdata, NULL, wk->probe_auth.ssid,
wk->probe_auth.ssid_len, NULL, 0);
wk->probe_auth.ssid_len, NULL, 0, true);
wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
run_again(local, wk->timeout);