func (e *Entry) checkIPandProtocol(set *IPSet) bool {
	// set default protocol to tcp if empty
	if len(e.Protocol) == 0 {
		e.Protocol = ProtocolTCP
	} else if !validateProtocol(e.Protocol) {
		return false
	}
	return e.checkIP(set)
}

// checkIP checks if IP of Entry is valid.
func (e *Entry) checkIP(set *IPSet) bool {
	if netutils.ParseIPSloppy(e.IP) == nil {

func ValidatePortName(name string) error {
	if !labels.IsDNS1123Label(name) {
		return fmt.Errorf("invalid port name: %s", name)
	}
	return nil
}

// ValidateProtocol validates a portocol name is known
func ValidateProtocol(protocolStr string) error {
	// Empty string is used for protocol sniffing.
	if protocolStr != "" && protocol.Parse(protocolStr) == protocol.Unsupported {

		},
		{ // case[7]
			protocol: "",
			valid:    false,
		},
		{ // case[8]
			protocol: ProtocolSCTP,
			valid:    true,
		},
	}
	for i := range testCases {
		valid := validateProtocol(testCases[i].protocol)
		if valid != testCases[i].valid {
			t.Errorf("case [%d]: unexpected mismatch, expect valid[%v], got valid[%v], desc: %s", i, testCases[i].valid, valid, testCases[i].desc)
		}
	}
}