From e7fc5d2e6b34102282ff94a6e5255af4b6e9ccb5 Mon Sep 17 00:00:00 2001
From: Peter Oh <peter.oh@bowerswilkins.com>
Date: Thu, 12 Apr 2018 02:49:08 -0700
Subject: [PATCH 11/15] mesh: Allow DFS channels to be selected if dfs is
 enabled

Note: DFS is assumed to be usable if a country code has been set

Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net>
Signed-off-by: Peter Oh <peter.oh@bowerswilkins.com>
---
 wpa_supplicant/wpa_supplicant.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -2033,6 +2033,8 @@ void ibss_mesh_setup_freq(struct wpa_sup
 	struct hostapd_freq_params vht_freq;
 	int chwidth, seg0, seg1;
 	u32 vht_caps = 0;
+	int dfs_enabled = wpa_s->conf->country[0] &&
+		(wpa_s->drv_flags & WPA_DRIVER_FLAGS_RADAR);
 
 	freq->freq = ssid->frequency;
 
@@ -2109,8 +2111,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
 		return;
 
 	/* Check primary channel flags */
-	if (pri_chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
+	if (pri_chan->flag & HOSTAPD_CHAN_DISABLED)
 		return;
+	if (pri_chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+		if (!dfs_enabled)
+			return;
 
 #ifdef CONFIG_HT_OVERRIDES
 	if (ssid->disable_ht40)
@@ -2136,8 +2141,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
 		return;
 
 	/* Check secondary channel flags */
-	if (sec_chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
+	if (sec_chan->flag & HOSTAPD_CHAN_DISABLED)
 		return;
+	if (sec_chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+		if (!dfs_enabled)
+			return;
 
 	freq->channel = pri_chan->chan;
 
@@ -2227,8 +2235,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
 			return;
 
 		/* Back to HT configuration if channel not usable */
-		if (chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
+		if (chan->flag & HOSTAPD_CHAN_DISABLED)
 			return;
+		if (chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+			if (!dfs_enabled)
+				return;
 	}
 
 	chwidth = VHT_CHANWIDTH_80MHZ;
@@ -2248,10 +2259,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
 				if (!chan)
 					continue;
 
-				if (chan->flag & (HOSTAPD_CHAN_DISABLED |
-						  HOSTAPD_CHAN_NO_IR |
-						  HOSTAPD_CHAN_RADAR))
+				if (chan->flag & HOSTAPD_CHAN_DISABLED)
 					continue;
+				if (chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+					if (!dfs_enabled)
+						continue;
 
 				/* Found a suitable second segment for 80+80 */
 				chwidth = VHT_CHANWIDTH_80P80MHZ;
