Change interface if on wifi

src/freedombone-app-dlna

@@ -199,9 +199,13 @@ function install_dlna_main {
     fi
     sed -i 's/#root_container=./root_container=B/g' /etc/minidlna.conf
     if [[ $SYSTEM_TYPE != "mesh"* ]]; then
-        sed -i 's/#network_interface=/network_interface=eth0/g' /etc/minidlna.conf
+        if [[ $(config_param_exists WIFI_INTERFACE) == "0" ]]; then
+            sed -i 's/#network_interface=/network_interface=eth0/g' /etc/minidlna.conf
+        else
+            sed -i "s/#network_interface=/network_interface=$WIFI_INTERFACE/g" /etc/minidlna.conf
+        fi
     else
-        sed -i 's/#network_interface=/network_interface=$WIFI_INTERFACE/g' /etc/minidlna.conf
+        sed -i "s/#network_interface=/network_interface=$WIFI_INTERFACE/g" /etc/minidlna.conf
     fi
     sed -i "s/#friendly_name=/friendly_name=\"${PROJECT_NAME} Media\"/g" /etc/minidlna.conf
     sed -i 's|#db_dir=/var/cache/minidlna|db_dir=/var/cache/minidlna|g' /etc/minidlna.conf

src/freedombone-utils-config

@@ -203,6 +203,25 @@ function read_config_param {
     fi
 }
 
+function config_param_exists {
+    param_name="$1"
+
+    if [ ${#param_name} -gt 0 ]; then
+        if [ $CONFIGURATION_FILE ]; then
+            if [ -f $CONFIGURATION_FILE ]; then
+                if grep -q "${param_name}=" $CONFIGURATION_FILE; then
+                    param_value=$(cat $CONFIGURATION_FILE | grep "${param_name}=" | head -n 1 | awk -F '=' '{print $2}')
+                    if [ ${#param_value} -gt 0 ]; then
+                        echo "1"
+                        return
+                    fi
+                fi
+            fi
+        fi
+    fi
+    echo "0"
+}
+
 function write_config_param {
     param_name="$1"
     param_value="$2"