[][MAC80211][hostapd][Mark DFS channel available for CSA]
[Description]
Add optional parameter to mark DFS channel as available for CSA.
WFA TGac VHT-4.2.16h-DFS requires CSA while switching to DFS channel.
Hostapd original behavior is to disable/enable interface to move to new
channel.
"skip_cac" parameter is optional in command hostapd_cli chan_switch.
When not used, original hostapd behavior is followed for channel switch.
Use NL80211_ATTR_RADAR_BACKGROUND attribute for skipping CAC.
[Release-log]
Change-Id: I3968e6d5c613ef84df98702440aebd2aca16cee8
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7162082
diff --git a/autobuild_mac80211_release/package/network/services/hostapd/patches/mtk-0020-hostapd-mtk-Mark-DFS-channel-as-available-for-CSA.patch b/autobuild_mac80211_release/package/network/services/hostapd/patches/mtk-0020-hostapd-mtk-Mark-DFS-channel-as-available-for-CSA.patch
new file mode 100644
index 0000000..1fe5c88
--- /dev/null
+++ b/autobuild_mac80211_release/package/network/services/hostapd/patches/mtk-0020-hostapd-mtk-Mark-DFS-channel-as-available-for-CSA.patch
@@ -0,0 +1,60 @@
+From 3e9500a42a41e8cd7c2d7bc20aba96e1e17161fb Mon Sep 17 00:00:00 2001
+From: "himanshu.goyal" <himanshu.goyal@mediatek.com>
+Date: Fri, 3 Mar 2023 12:45:42 +0800
+Subject: [PATCH] hostapd: mtk: Mark DFS channel as available for CSA.
+
+---
+ hostapd/ctrl_iface.c | 10 ++++++++++
+ hostapd/hostapd_cli.c | 2 +-
+ src/ap/ctrl_iface_ap.c | 1 +
+ 3 files changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/hostapd/ctrl_iface.c b/hostapd/ctrl_iface.c
+index c33b7a4..9ba6992 100644
+--- a/hostapd/ctrl_iface.c
++++ b/hostapd/ctrl_iface.c
+@@ -2704,6 +2704,16 @@ static int hostapd_ctrl_iface_chan_switch(struct hostapd_iface *iface,
+ settings.freq_params.he_enabled = iface->conf->ieee80211ax;
+ }
+
++ if (settings.freq_params.radar_background) {
++ hostapd_dfs_sta_update_state(iface,
++ settings.freq_params.freq,
++ settings.freq_params.ht_enabled,
++ settings.freq_params.sec_channel_offset,
++ bandwidth, settings.freq_params.center_freq1,
++ settings.freq_params.center_freq2,
++ HOSTAPD_CHAN_DFS_AVAILABLE);
++ }
++
+ if (settings.freq_params.center_freq1)
+ dfs_range += hostapd_is_dfs_overlap(
+ iface, bandwidth, settings.freq_params.center_freq1);
+diff --git a/hostapd/hostapd_cli.c b/hostapd/hostapd_cli.c
+index 0da18e2..6231e51 100644
+--- a/hostapd/hostapd_cli.c
++++ b/hostapd/hostapd_cli.c
+@@ -1693,7 +1693,7 @@ static const struct hostapd_cli_cmd hostapd_cli_commands[] = {
+ "<addr> = send QoS Map Configure frame" },
+ { "chan_switch", hostapd_cli_cmd_chan_switch, NULL,
+ "<cs_count> <freq> [sec_channel_offset=] [center_freq1=]\n"
+- " [center_freq2=] [bandwidth=] [blocktx] [ht|vht]\n"
++ " [center_freq2=] [bandwidth=] [blocktx] [ht|vht] [skip_cac]\n"
+ " = initiate channel switch announcement" },
+ { "hs20_wnm_notif", hostapd_cli_cmd_hs20_wnm_notif, NULL,
+ "<addr> <url>\n"
+diff --git a/src/ap/ctrl_iface_ap.c b/src/ap/ctrl_iface_ap.c
+index 18bae5c..2fae590 100644
+--- a/src/ap/ctrl_iface_ap.c
++++ b/src/ap/ctrl_iface_ap.c
+@@ -938,6 +938,7 @@ int hostapd_parse_csa_settings(const char *pos,
+ settings->freq_params.vht_enabled = !!os_strstr(pos, " vht");
+ settings->freq_params.he_enabled = !!os_strstr(pos, " he");
+ settings->freq_params.eht_enabled = !!os_strstr(pos, " eht");
++ settings->freq_params.radar_background = !!os_strstr(pos, " skip_cac");
+ settings->block_tx = !!os_strstr(pos, " blocktx");
+ #undef SET_CSA_SETTING
+
+--
+2.18.0
+