bool
channel_change(int idx)
{
if (!ifctrl_iwset_freq(conf.ifname, channels[idx].freq)) {
printlog("ERROR: could not set channel %d", channels[idx].chan);
return false;
}
conf.channel_idx = idx;
last_channelchange = the_time;
return true;
}
/* Note: ht40plus is only used for HT40 channel width, to distinguish between
* HT40+ and HT40- */
bool
channel_change(int idx, enum chan_width width, bool ht40plus)
{
unsigned int center1 = 0;
if (width == CHAN_WIDTH_UNSPEC)
width = channel_get_band_from_idx(idx).max_chan_width;
switch (width) {
case CHAN_WIDTH_20_NOHT:
case CHAN_WIDTH_20:
break;
case CHAN_WIDTH_40:
center1 = get_center_freq_ht40(channels.chan[idx].freq, ht40plus);
break;
case CHAN_WIDTH_80:
case CHAN_WIDTH_160:
center1 = get_center_freq_vht(channels.chan[idx].freq, width);
break;
default:
printlog("%s not implemented", channel_width_string(width, -1));
break;
}
/* only 20 MHz channels don't need additional center freq, otherwise we fail here
* quietly because the scanning code sometimes tries invalid HT40+/- channels */
if (center1 == 0 && !(width == CHAN_WIDTH_20_NOHT || width == CHAN_WIDTH_20))
return false;
if (!ifctrl_iwset_freq(conf.ifname, channels.chan[idx].freq, width, center1)) {
printlog("ERROR: Failed to set CH %d (%d MHz) %s center %d",
channels.chan[idx].chan, channels.chan[idx].freq,
channel_width_string(width, ht40plus),
center1);
return false;
}
printlog("Set CH %d (%d MHz) %s center %d",
channels.chan[idx].chan, channels.chan[idx].freq,
channel_width_string(width, ht40plus),
center1);
conf.channel_idx = idx;
conf.channel_width = width;
conf.channel_ht40plus = ht40plus;
last_channelchange = the_time;
return true;
}