From cefc52e6b93731c713f1bba1cb5e7e92105b758b Mon Sep 17 00:00:00 2001 From: David Bauer Date: Fri, 3 Jul 2020 23:00:34 +0200 Subject: [PATCH] dfs: enter DFS state if no available channel is found 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 --- src/ap/dfs.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) --- a/src/ap/dfs.c +++ b/src/ap/dfs.c @@ -1066,8 +1066,15 @@ static int hostapd_dfs_start_channel_swi &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;