openwrt/package/network/services/hostapd/patches/012-mesh-fix-channel-switch-error-during-CAC.patch

From ab6995f15aae17af93507dd2344615f91672a31a Mon Sep 17 00:00:00 2001
From: Peter Oh <peter.oh@bowerswilkins.com>
Date: Tue, 30 Jun 2020 14:19:00 +0200
Subject: [PATCH 12/19] mesh: fix channel switch error during CAC

Mesh interface has used its channel parameters that configured
during its initialization even after channel switched due to
DFS radar detection during CAC which caused channel switch error.
This change fixes the error by updating its channel parameters
when channel's been changed from initial one.

Signed-off-by: Peter Oh <peter.oh@bowerswilkins.com>
---
 wpa_supplicant/mesh.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

--- a/wpa_supplicant/mesh.c
+++ b/wpa_supplicant/mesh.c
@@ -13,6 +13,7 @@
 #include "utils/uuid.h"
 #include "common/ieee802_11_defs.h"
 #include "common/wpa_ctrl.h"
+#include "common/hw_features_common.h"
 #include "ap/sta_info.h"
 #include "ap/hostapd.h"
 #include "ap/ieee802_11.h"
@@ -206,6 +207,39 @@ static int wpas_mesh_complete(struct wpa
 		return -1;
 	}
 
+	/*
+	 * inspect if channel's been changed since initialized.
+	 * i.e. DFS radar detection
+	 */
+	if (ifmsh->freq != params->freq.freq) {
+		wpa_s->assoc_freq = ifmsh->freq;
+		ssid->frequency = ifmsh->freq;
+		struct he_capabilities *he_capab = NULL;
+
+		if (ifmsh->current_mode)
+			he_capab = &ifmsh->current_mode->he_capab[IEEE80211_MODE_MESH];
+
+		if (hostapd_set_freq_params(&params->freq,
+				ifmsh->conf->hw_mode,
+				ifmsh->freq,
+				ifmsh->conf->channel,
+				ifmsh->conf->enable_edmg,
+				ifmsh->conf->edmg_channel,
+				ifmsh->conf->ieee80211n,
+				ifmsh->conf->ieee80211ac,
+				ifmsh->conf->ieee80211ax,
+				ifmsh->conf->secondary_channel,
+				hostapd_get_oper_chwidth(ifmsh->conf),
+				hostapd_get_oper_centr_freq_seg0_idx(ifmsh->conf),
+				hostapd_get_oper_centr_freq_seg1_idx(ifmsh->conf),
+				ifmsh->conf->vht_capab,
+				he_capab)) {
+			wpa_printf(MSG_ERROR, "Error updating mesh frequency params.");
+			wpa_supplicant_mesh_deinit(wpa_s);
+			return -1;
+		}
+	}
+
 	if (ifmsh->mconf->security != MESH_CONF_SEC_NONE &&
 	    wpas_mesh_init_rsn(wpa_s)) {
 		wpa_printf(MSG_ERROR,