protocol

    type ProtocolHeader interface {
        GetBodyLen() int
        SetBodyLen(int)
    }

struct definition

Structures must consist only of the following types:

• uint8
• uint16
• uint32
• uint64
• bool

GetByteLen() int

It should be implemented to return the length of the protocol body in the header struct.

SetByteLen(int)

It should be implemented to set the body length in header struct at length to the protocol body.

implementation example

    type BasicProtocol struct {
        Type    uint16
        Method  uint16
        Seq     uint32
        BodyLen uint32
    }

    func (bp *BasicProtocol) GetBodyLen() int {
        return int(bp.BodyLen)
    }

    func (bp *BasicProtocol) SetBodyLen(l int) {
        bp.BodyLen = uint32(l)
    }

protocol structure

    +- binary.Size(header) -+----------- len(msg) -----------+
    |       header          |              msg               |
    +-----------------------+--------------------------------+

EncodeProtocolByte(head ProtocolHeader, msg []byte) ([]byte, error)

return joined binary enchoded header, msg

DecodeProtocolByte(head ProtocolHeader, msg []byte) ([]byte, error)

DecodeHeader(head ProtocolHeader, headerByte []byte) error

ReadProtocol(reader io.Reader, head ProtocolHeader) ([]byte, error)

WriteProtocol(writer io.Writer, head ProtocolHeader, msg []byte) error