Hello:
I am running my compat-wireless with version 3.8-1 and found that when I
issue ghe SIOCGIWFREQ ioctl while in monitor mode returns with a
-ENODATA. I have found that the ieee80211_cfg_get_channel function in
net/wireless/cfg.c does not account for any channel context when the
interface is in monitor mode and any attepmpt to use the SIOCGIWFREQ
function will error out. I have modified my local version to include a
check for a monitor interfaces The code block below fixes the problem:
static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
struct wireless_dev *wdev,
struct cfg80211_chan_def *chandef)
{
struct ieee80211_sub_if_data *sdata =
IEEE80211_WDEV_TO_SUB_IF(wdev);
struct ieee80211_chanctx_conf *chanctx_conf;
struct ieee80211_local *local = wiphy_priv(wiphy);
int ret = -ENODATA;
if (!wdev)
return -EOPNOTSUPP;
switch (wdev->iftype) {
case NL80211_IFTYPE_MONITOR:
*chandef = local->monitor_chandef;
ret = 0;
break;
default:
rcu_read_lock();
chanctx_conf =
rcu_dereference(sdata->vif.chanctx_conf);
if (chanctx_conf) {
*chandef = chanctx_conf->def;
ret = 0;
}
rcu_read_unlock();
}
return ret;
}
Thanks
Clyde