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DFS: Enter DFS state if no available channel is found

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Previously hostapd would not stop transmitting when a DFS event was
detected and no available channel to switch to was available.

Disable and re-enable the interface to enter DFS state. This way, TX
does not happen until the kernel notifies hostapd about the NOP
expiring.

Signed-off-by: David Bauer <mail@david-bauer.net>
This commit is contained in:
David Bauer 2020-07-04 10:12:21 +02:00 committed by Jouni Malinen
parent eee0d242bb
commit 4683b72183
1 changed files with 10 additions and 2 deletions
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12
src/ap/dfs.c
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@ -1070,8 +1070,16 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
&oper_centr_freq_seg0_idx,
&oper_centr_freq_seg1_idx,
&skip_radar);
if (!channel)
return err;
if (!channel) {
/*
* Toggle interface state to enter DFS state
* until NOP is finished.
*/
hostapd_disable_iface(iface);
hostapd_enable_iface(iface);
return 0;
}
if (!skip_radar) {
iface->freq = channel->freq;
iface->conf->channel = channel->chan;