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nl80211: Add frequency configuration (including HT40)

Browse source 
This patch adds new NL80211_CMD_SET_WIPHY attributes
NL80211_ATTR_WIPHY_FREQ and NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET to allow
userspace to set the operating channel (e.g., hostapd for AP mode).

Signed-off-by: Jouni Malinen <[email protected]>
Acked-by: Johannes Berg <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
This commit is contained in:
Jouni Malinen 2008-11-26 16:15:24 +02:00 • committed by John W. Linville
commit 72bdcf3438
8 changed files with 131 additions and 6 deletions
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13
net/mac80211/cfg.c
View file

@ -1095,6 +1095,18 @@ static int ieee80211_set_txq_params(struct wiphy *wiphy,
return 0;
}
static int ieee80211_set_channel(struct wiphy *wiphy,
struct ieee80211_channel *chan,
enum nl80211_sec_chan_offset sec_chan_offset)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
local->oper_channel = chan;
local->oper_sec_chan_offset = sec_chan_offset;
return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
}
struct cfg80211_ops mac80211_config_ops = {
.add_virtual_intf = ieee80211_add_iface,
.del_virtual_intf = ieee80211_del_iface,
@ -1122,4 +1134,5 @@ struct cfg80211_ops mac80211_config_ops = {
#endif
.change_bss = ieee80211_change_bss,
.set_txq_params = ieee80211_set_txq_params,
.set_channel = ieee80211_set_channel,
};

1
net/mac80211/ieee80211_i.h
View file

@ -626,6 +626,7 @@ struct ieee80211_local {
struct delayed_work scan_work;
struct ieee80211_sub_if_data *scan_sdata;
struct ieee80211_channel *oper_channel, *scan_channel;
enum nl80211_sec_chan_offset oper_sec_chan_offset;
u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
size_t scan_ssid_len;
struct list_head bss_list;

34
net/mac80211/main.c
View file

@ -195,19 +195,41 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
struct ieee80211_channel *chan;
int ret = 0;
int power;
enum nl80211_sec_chan_offset sec_chan_offset;
might_sleep();
if (local->sw_scanning)
if (local->sw_scanning) {
chan = local->scan_channel;
else
sec_chan_offset = NL80211_SEC_CHAN_NO_HT;
} else {
chan = local->oper_channel;
if (chan != local->hw.conf.channel) {
local->hw.conf.channel = chan;
changed |= IEEE80211_CONF_CHANGE_CHANNEL;
sec_chan_offset = local->oper_sec_chan_offset;
}
if (chan != local->hw.conf.channel ||
sec_chan_offset != local->hw.conf.ht.sec_chan_offset) {
local->hw.conf.channel = chan;
switch (sec_chan_offset) {
case NL80211_SEC_CHAN_NO_HT:
local->hw.conf.ht.enabled = false;
local->hw.conf.ht.sec_chan_offset = 0;
break;
case NL80211_SEC_CHAN_DISABLED:
local->hw.conf.ht.enabled = true;
local->hw.conf.ht.sec_chan_offset = 0;
break;
case NL80211_SEC_CHAN_BELOW:
local->hw.conf.ht.enabled = true;
local->hw.conf.ht.sec_chan_offset = -1;
break;
case NL80211_SEC_CHAN_ABOVE:
local->hw.conf.ht.enabled = true;
local->hw.conf.ht.sec_chan_offset = 1;
break;
}
changed |= IEEE80211_CONF_CHANGE_CHANNEL;
}
if (!local->hw.conf.power_level)
power = chan->max_power;

1
net/mac80211/util.c
View file

@ -641,6 +641,7 @@ int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
chan->flags & IEEE80211_CHAN_NO_IBSS)
return ret;
local->oper_channel = chan;
local->oper_sec_chan_offset = NL80211_SEC_CHAN_NO_HT;
if (local->sw_scanning || local->hw_scanning)
ret = 0;