func (n *npmp) AddMapping(protocol string, extPort, intPort int,
	name string, lifetime time.Duration) error {
	if lifetime <= 0 {
		return ErrTooShortLifetime
	}
	_, err := n.c.AddPortMapping(strings.ToLower(protocol),
		intPort, extPort, int(lifetime/time.Second))
	return err
}
func (n *npmp) AddMapping(protocol string, extPort, intPort int,
	name string, lifetime time.Duration) error {
	if lifetime <= 0 {
		return ErrTooShortLifetime
	}
	_, err := n.c.AddPortMapping(strings.ToLower(protocol),
		intPort, extPort, int(lifetime/time.Second))
	return err
}
func ( n * npmp ) AddMapping ( protocol string , extPort , intPort int , name string , lifetime time . Duration ) error { if lifetime <= 0 { return ErrTooShortLifetime } _ , err := n . c . AddPortMapping ( strings . ToLower ( protocol ) , intPort , extPort , int ( lifetime / time . Second ) ) return err }
// AddMapping maps an external port to a local port for a specific
// service to NAT-PMP interface.
AddMapping maps an external port to a local port for a specific service to NAT - PMP interface .