hostapd: introduce background_radar option

Introduce a new option background_radar to toggle hostapd's background
radar feature. Enabling this allows DFS CAC to run on dedicated radio RF
chains while the radio(s) are otherwise running normal AP activities on
other channels.

As OpenWrt configures hostapd to use a channel list even when a single
channel is configured, using this feature requires a list of channels in
/etc/config/wireless. Alternatively, channel can be set to auto.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: David Bauer <mail@david-bauer.net>

diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index 3d0afb261fb53c6c64ebd1806a4f2d5e039715da..3ffe6de66bd6cb1ee36170f54aeb9a1a4fb5ef29 100644 (file)
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -29,7 +29,7 @@ drv_mac80211_init_device_config() {
        config_add_string distance
        config_add_int beacon_int chanbw frag rts
        config_add_int rxantenna txantenna antenna_gain txpower
-       config_add_boolean noscan ht_coex acs_exclude_dfs
+       config_add_boolean noscan ht_coex acs_exclude_dfs background_radar
        config_add_array ht_capab
        config_add_array channels
        config_add_array scan_list
@@ -273,6 +273,11 @@ mac80211_hostapd_setup_base() {
                        vht_center_seg0=$idx
                ;;
        esac
+       [ "$band" = "5g" ] && {
+               json_get_vars background_radar:0
+
+               [ "$background_radar" -eq 1 ] && append base_cfg "enable_background_radar=1" "$N"
+       }
        [ "$band" = "6g" ] && {
                op_class=
                case "$htmode" in