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hostapd: Allow to switch to usable DFS channels 

If channels are "available", change to "usable" DFS channels as a
fallback, too. This requires CAC, but it is still better to do that
instead of stopping service completely.

Signed-hostap: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Simon Wunderlich 2014-02-06 19:30:39 +01:00 committed by Jouni Malinen
parent 01b99998bd
commit e070051207
1 changed files with 26 additions and 2 deletions
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28
src/ap/dfs.c
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@ -748,9 +748,33 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
skip_radar);
if (!channel) {
/* FIXME: Wait for channel(s) to become available */
/*
* If there is no channel to switch immediately to, check if
* there is another channel where we can switch even if it
* requires to perform a CAC first.
*/
skip_radar = 0;
channel = dfs_get_valid_channel(iface, &secondary_channel,
&vht_oper_centr_freq_seg0_idx,
&vht_oper_centr_freq_seg1_idx,
skip_radar);
if (!channel) {
/* FIXME: Wait for channel(s) to become available */
hostapd_disable_iface(iface);
return err;
}
iface->freq = channel->freq;
iface->conf->channel = channel->chan;
iface->conf->secondary_channel = secondary_channel;
iface->conf->vht_oper_centr_freq_seg0_idx =
vht_oper_centr_freq_seg0_idx;
iface->conf->vht_oper_centr_freq_seg1_idx =
vht_oper_centr_freq_seg1_idx;
hostapd_disable_iface(iface);
return err;
hostapd_enable_iface(iface);
return 0;
}
wpa_printf(MSG_DEBUG, "DFS will switch to a new channel %d",