bool
channel_auto_change(void)
{
int new_idx;
bool ret = true;
int start_idx;
if (conf.channel_idx == -1)
return false; /* The current channel is still unknown for some
* reason (mac80211 bug, busy physical interface,
* etc.), it will be fixed when the first packet
* arrives, see fixup_packet_channel().
*
* Without this return, horst would busy-loop forever
* (making the ui totally unresponsive) in the channel
* changing code below because start_idx would be -1
* as well. Short-circuit exiting here is quite
* logical though: it does not make any sense to scan
* channels as long as the channel module is not
* initialized properly. */
if (channel_get_remaining_dwell_time() > 0)
return false; /* too early */
if (conf.do_change_channel) {
start_idx = new_idx = conf.channel_idx;
do {
enum chan_width max_width = channel_get_band_from_idx(new_idx).max_chan_width;
/*
* For HT40 we visit the same channel twice, once with HT40+
* and once with HT40-. This is necessary to see the HT40+/-
* data packets
*/
if (max_width == CHAN_WIDTH_40) {
if (conf.channel_ht40plus)
new_idx++;
conf.channel_ht40plus = !conf.channel_ht40plus; // toggle
} else {
new_idx++;
}
if (new_idx >= channels.num_channels ||
new_idx >= MAX_CHANNELS ||
(conf.channel_max &&
channel_get_chan(new_idx) > conf.channel_max))
new_idx = 0;
ret = channel_change(new_idx, max_width, conf.channel_ht40plus);
/* try setting different channels in case we get errors only
* on some channels (e.g. ipw2200 reports channel 14 but cannot
* be set to use it). stop if we tried all channels */
} while (ret != 1 && new_idx != start_idx);
}
return ret;
}
bool
channel_auto_change(void)
{
int new_idx;
bool ret = true;
int start_idx;
if (conf.channel_idx == -1)
return false; /* The current channel is still unknown for some
* reason (mac80211 bug, busy physical interface,
* etc.), it will be fixed when the first packet
* arrives, see fixup_packet_channel().
*
* Without this return, horst would busy-loop forever
* (making the ui totally unresponsive) in the channel
* changing code below because start_idx would be -1
* as well. Short-circuit exiting here is quite
* logical though: it does not make any sense to scan
* channels as long as the channel module is not
* initialized properly. */
if (channel_get_remaining_dwell_time() > 0)
return false; /* too early */
if (conf.do_change_channel) {
start_idx = new_idx = conf.channel_idx;
do {
new_idx = new_idx + 1;
if (new_idx >= conf.num_channels ||
new_idx >= MAX_CHANNELS ||
(conf.channel_max &&
channel_get_chan_from_idx(new_idx) > conf.channel_max))
new_idx = 0;
ret = channel_change(new_idx);
/* try setting different channels in case we get errors only
* on some channels (e.g. ipw2200 reports channel 14 but cannot
* be set to use it). stop if we tried all channels */
} while (ret != 1 && new_idx != start_idx);
}
return ret;
}
