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mac80211: allow scanning for 5/10 MHz channels in IBSS

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Use a chandef instead of just the channel for scanning, and enable
5/10 Mhz scanning for IBSS mode. Also reporting is changed to the new
inform_bss functions.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
tirimbino
Simon Wunderlich 12 years ago committed by Johannes Berg
parent 0430c88347
commit 7ca15a0ae8
4 changed files with 56 additions and 23 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 16
      net/mac80211/ibss.c
  2. 5
      net/mac80211/ieee80211_i.h
  3. 13
      net/mac80211/main.c
  4. 45
      net/mac80211/scan.c

16
net/mac80211/ibss.c
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@ -51,6 +51,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
u32 bss_change, rate_flags, rates = 0, rates_added = 0;
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
struct cfg80211_chan_def chandef;
enum nl80211_bss_scan_width scan_width;
struct beacon_data *presp;
int frame_len;
int shift;
@ -271,8 +272,10 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
mod_timer(&ifibss->timer,
round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
bss = cfg80211_inform_bss_frame(local->hw.wiphy, chan,
mgmt, presp->head_len, 0, GFP_KERNEL);
scan_width = cfg80211_chandef_to_scan_width(&chandef);
bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan,
scan_width, mgmt,
presp->head_len, 0, GFP_KERNEL);
cfg80211_put_bss(local->hw.wiphy, bss);
netif_carrier_on(sdata->dev);
cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL);
@ -726,6 +729,7 @@ static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
enum nl80211_bss_scan_width scan_width;
sdata_assert_lock(sdata);
@ -747,8 +751,9 @@ static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
sdata_info(sdata,
"No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n");
scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef);
ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len,
NULL);
NULL, scan_width);
}
static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
@ -798,6 +803,7 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
struct cfg80211_bss *cbss;
struct ieee80211_channel *chan = NULL;
const u8 *bssid = NULL;
enum nl80211_bss_scan_width scan_width;
int active_ibss;
u16 capability;
@ -846,8 +852,10 @@ static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
IEEE80211_SCAN_INTERVAL)) {
sdata_info(sdata, "Trigger new scan to find an IBSS to join\n");
scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef);
ieee80211_request_ibss_scan(sdata, ifibss->ssid,
ifibss->ssid_len, chan);
ifibss->ssid_len, chan,
scan_width);
} else {
int interval = IEEE80211_SCAN_INTERVAL;

5
net/mac80211/ieee80211_i.h
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@ -1057,7 +1057,7 @@ struct ieee80211_local {
struct cfg80211_ssid scan_ssid;
struct cfg80211_scan_request *int_scan_req;
struct cfg80211_scan_request *scan_req, *hw_scan_req;
struct ieee80211_channel *scan_channel;
struct cfg80211_chan_def scan_chandef;
enum ieee80211_band hw_scan_band;
int scan_channel_idx;
int scan_ies_len;
@ -1337,7 +1337,8 @@ void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
void ieee80211_scan_work(struct work_struct *work);
int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
const u8 *ssid, u8 ssid_len,
struct ieee80211_channel *chan);
struct ieee80211_channel *chan,
enum nl80211_bss_scan_width scan_width);
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
struct cfg80211_scan_request *req);
void ieee80211_scan_cancel(struct ieee80211_local *local);

13
net/mac80211/main.c
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@ -102,17 +102,8 @@ static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
if (local->scan_channel) {
chandef.chan = local->scan_channel;
/* If scanning on oper channel, use whatever channel-type
* is currently in use.
*/
if (chandef.chan == local->_oper_chandef.chan) {
chandef = local->_oper_chandef;
} else {
chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
chandef.center_freq1 = chandef.chan->center_freq;
}
if (local->scan_chandef.chan) {
chandef = local->scan_chandef;
} else if (local->tmp_channel) {
chandef.chan = local->tmp_channel;
chandef.width = NL80211_CHAN_WIDTH_20_NOHT;

45
net/mac80211/scan.c
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@ -66,6 +66,7 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
struct cfg80211_bss *cbss;
struct ieee80211_bss *bss;
int clen, srlen;
enum nl80211_bss_scan_width scan_width;
s32 signal = 0;
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
@ -73,8 +74,15 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
signal = (rx_status->signal * 100) / local->hw.max_signal;
cbss = cfg80211_inform_bss_frame(local->hw.wiphy, channel,
mgmt, len, signal, GFP_ATOMIC);
scan_width = NL80211_BSS_CHAN_WIDTH_20;
if (rx_status->flag & RX_FLAG_5MHZ)
scan_width = NL80211_BSS_CHAN_WIDTH_5;
if (rx_status->flag & RX_FLAG_10MHZ)
scan_width = NL80211_BSS_CHAN_WIDTH_10;
cbss = cfg80211_inform_bss_width_frame(local->hw.wiphy, channel,
scan_width, mgmt, len, signal,
GFP_ATOMIC);
if (!cbss)
return NULL;
@ -300,7 +308,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted,
rcu_assign_pointer(local->scan_sdata, NULL);
local->scanning = 0;
local->scan_channel = NULL;
local->scan_chandef.chan = NULL;
/* Set power back to normal operating levels. */
ieee80211_hw_config(local, 0);
@ -635,11 +643,34 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
{
int skip;
struct ieee80211_channel *chan;
enum nl80211_bss_scan_width oper_scan_width;
skip = 0;
chan = local->scan_req->channels[local->scan_channel_idx];
local->scan_channel = chan;
local->scan_chandef.chan = chan;
local->scan_chandef.center_freq1 = chan->center_freq;
local->scan_chandef.center_freq2 = 0;
switch (local->scan_req->scan_width) {
case NL80211_BSS_CHAN_WIDTH_5:
local->scan_chandef.width = NL80211_CHAN_WIDTH_5;
break;
case NL80211_BSS_CHAN_WIDTH_10:
local->scan_chandef.width = NL80211_CHAN_WIDTH_10;
break;
case NL80211_BSS_CHAN_WIDTH_20:
/* If scanning on oper channel, use whatever channel-type
* is currently in use.
*/
oper_scan_width = cfg80211_chandef_to_scan_width(
&local->_oper_chandef);
if (chan == local->_oper_chandef.chan &&
oper_scan_width == local->scan_req->scan_width)
local->scan_chandef = local->_oper_chandef;
else
local->scan_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
break;
}
if (ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL))
skip = 1;
@ -679,7 +710,7 @@ static void ieee80211_scan_state_suspend(struct ieee80211_local *local,
unsigned long *next_delay)
{
/* switch back to the operating channel */
local->scan_channel = NULL;
local->scan_chandef.chan = NULL;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
/* disable PS */
@ -821,7 +852,8 @@ int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
const u8 *ssid, u8 ssid_len,
struct ieee80211_channel *chan)
struct ieee80211_channel *chan,
enum nl80211_bss_scan_width scan_width)
{
struct ieee80211_local *local = sdata->local;
int ret = -EBUSY;
@ -871,6 +903,7 @@ int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
local->int_scan_req->ssids = &local->scan_ssid;
local->int_scan_req->n_ssids = 1;
local->int_scan_req->scan_width = scan_width;
memcpy(local->int_scan_req->ssids[0].ssid, ssid, IEEE80211_MAX_SSID_LEN);
local->int_scan_req->ssids[0].ssid_len = ssid_len;

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