Turn WiFi off before suspend

This might help avoiding stability issues with WiFi.

sleepwalk

@@ -7,6 +7,7 @@ SLEEP_MAX_SECS=600
 WAKE_SECS=35
 LOCK_DIR="/tmp/sleepwalk"
 CPU_STATE=1
+THRESHOLD="15.00"
 
 set_cpu_offline() {
         if [ $CPU_STATE -eq 1 ]; then
@@ -41,6 +42,8 @@ start_deep_sleep() {
         sleep 5 # Give some extra time for pending output data
 
         if [ can_suspend ]; then
+		WIFI_WAS_ON=$(nmcli r wifi)
+		nmcli r wifi off
                 echo mem > /sys/power/state 2>/dev/null
         fi
 
@@ -107,8 +110,38 @@ is_screen_on() {
         return "$(cat /sys/class/backlight/backlight/bl_power)"
 }
 
+network_activity() {
+	for n in $(seq 3)
+	do
+		for i in wwan0 wlan0
+		do
+			A=$(ifstat -i $i 1 1 | tail -n1)
+			RX=$(echo $A | awk '{print $1}')
+			TX=$(echo $A | awk '{print $2}')
+
+			if [ "$RX" = "n/a" ] || [ "$TX" = "n/a" ]
+			then
+				return 1
+			fi
+
+			for v in $RX $TX
+			do
+				C=$(echo $v $THRESHOLD |
+					awk '{if ($1 > $2) print "y"; else print "n"}')
+
+				if [ "$C" = "y" ]
+				then
+					return 0
+				fi
+			done
+		done
+	done
+
+	return 1
+}
+
 can_suspend() {
-        ! ( is_inhibitor_active || is_screen_on || is_charging )
+        ! ( is_inhibitor_active || is_screen_on || is_charging || network_activity )
 }
 
 led_sleep() {
@@ -179,6 +212,11 @@ if [ "$1" == "start" ]; then
                                 break
                         fi
                 done
+
+		if [ "$WIFI_WAS_ON" = "enabled" ]; then
+			nmcli r wifi on
+		fi
+
                 wait_for_notifications
         done
 elif [ "$1" == "stop" ]; then