@@ -367,6 +367,19 @@ static int acs_usable_ht40_chan(struct hostapd_channel_data *chan)
}
+static int acs_usable_vht80_chan(struct hostapd_channel_data *chan)
+{
+ const int allowed[] = { 36, 52, 100, 116, 132, 149 };
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(allowed); i++)
+ if (chan->chan == allowed[i])
+ return 1;
+
+ return 0;
+}
+
+
static int acs_survey_is_sufficient(struct freq_survey *survey)
{
if (!(survey->filled & SURVEY_HAS_NF)) {
@@ -541,6 +554,15 @@ acs_find_ideal_chan(struct hostapd_iface *iface)
continue;
}
+ if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
+ iface->conf->ieee80211ac &&
+ iface->conf->vht_oper_chwidth == 1 &&
+ !acs_usable_vht80_chan(chan)) {
+ wpa_printf(MSG_DEBUG, "ACS: Channel %d: not allowed as primary channel for VHT80",
+ chan->chan);
+ continue;
+ }
+
factor = 0;
if (acs_usable_chan(chan))
factor = chan->interference_factor;
The code considered, e.g. [44, 48, 52, 56] as a valid VHT80 -- which is not. This resulted in, e.g. failure to start CAC when channels overlapped segments included DFS channels. This adds a check similar to the HT40 one to prevent that. The check is performed the way it is as the ACS code assumes primary channel to be the first channel in a given segment. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> --- src/ap/acs.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)