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mac80211: handle power constraint and country IEs in RRM 

In beacons, handle the Country IE even if no Power Constraint IE
is present, and, capability wise, also in case that the Radio
Measurements capability is enabled.

In cases where the Country IE should be handled and that the
Power Constraint IE is not present, the Country IE alone will
set the power limit (and not both Country and Power Constraint
IEs).

Signed-off-by: Moshe Benji <moshe.benji@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Moshe Benji 2014-12-14 11:05:50 +02:00 committed by Johannes Berg
parent 179b8fc7fb
commit a5fee9cb62
1 changed files with 8 additions and 4 deletions
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12
net/mac80211/mlme.c
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@ -1287,8 +1287,11 @@ ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
country_ie_len -= 3;
}
if (have_chan_pwr)
if (have_chan_pwr && pwr_constr_elem)
*pwr_reduction = *pwr_constr_elem;
else
*pwr_reduction = 0;
return have_chan_pwr;
}
@ -1317,10 +1320,11 @@ static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
int chan_pwr = 0, pwr_reduction_80211h = 0;
int pwr_level_cisco, pwr_level_80211h;
int new_ap_level;
__le16 capab = mgmt->u.probe_resp.capab_info;
if (country_ie && pwr_constr_ie &&
mgmt->u.probe_resp.capab_info &
cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
if (country_ie &&
(capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
sdata, channel, country_ie, country_ie_len,
pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);