+function iface_freq_info(iface, config, params)
+{
+ let freq = params.frequency;
+ if (!freq)
+ return null;
+
+ let sec_offset = params.sec_chan_offset;
+ if (sec_offset != -1 && sec_offset != 1)
+ sec_offset = 0;
+
+ let width = 0;
+ for (let line in config.radio.data) {
+ if (!sec_offset && match(line, /^ht_capab=.*HT40/)) {
+ sec_offset = null; // auto-detect
+ continue;
+ }
+
+ let val = match(line, /^(vht_oper_chwidth|he_oper_chwidth)=(\d+)/);
+ if (!val)
+ continue;
+
+ val = int(val[2]);
+ if (val > width)
+ width = val;
+ }
+
+ if (freq < 4000)
+ width = 0;
+
+ return hostapd.freq_info(freq, sec_offset, width);
+}
+
+function iface_add(phy, config, phy_status)
+{
+ let config_inline = iface_gen_config(phy, config, !!phy_status);
+
+ let bss = config.bss[0];
+ let ret = hostapd.add_iface(`bss_config=${bss.ifname}:${config_inline}`);
+ if (ret < 0)
+ return false;
+
+ if (!phy_status)
+ return true;
+
+ let iface = hostapd.interfaces[bss.ifname];
+ if (!iface)
+ return false;
+
+ let freq_info = iface_freq_info(iface, config, phy_status);
+
+ return iface.start(freq_info) >= 0;
+}
+