const DefaultBindAllHostIP = "0.0.0.0"

// ProtocolPort represents a protocol port pair, e.g. tcp:80.
type ProtocolPort struct {
	Protocol string
	Port     int32
}

// NewProtocolPort creates a ProtocolPort instance.
func NewProtocolPort(protocol string, port int32) *ProtocolPort {
	pp := &ProtocolPort{
		Protocol: protocol,
		Port:     port,
	}

	if len(pp.Protocol) == 0 {