Regex Validation only IPv4 address Allowed ServiceNow Client Script (IP Address Regex)

IP Address Regex

function onChange(control, oldValue, newValue, isLoading) {
    if (isLoading || newValue == '') {
          return;
    }
  g_form.hideErrorBox('ip_address');
       var pattern =/^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/;   // regex pattern
   if(!pattern.test(newValue)){
     g_form.showErrorBox('ip_address', getMessage('Please enter Valid Email Address'));//show error messege
           g_form.setValue('ip_address', '');
   }
}