Function Encode

internal/codec/codec.go:114–127

Encode create a packet.Packet from the raw bytes slice and then encode to network bytes slice Protocol refs: https://github.com/NetEase/pomelo/wiki/Communication-Protocol - -|-------- --------|- - --------|------------------------|-------- 1 byte packet type, 3 bytes packet data l

(typ packet.Type, data []byte)

// --------|------------------------|--------
// 1 byte packet type, 3 bytes packet data length(big end), and data segment
func Encode(typ packet.Type, data []byte) ([]byte, error) {
	if typ < packet.Handshake || typ > packet.Kick {
		return nil, packet.ErrWrongPacketType
	}

	p := &packet.Packet{Type: typ, Length: len(data)}
	buf := make([]byte, p.Length+HeadLength)
	buf[0] = byte(p.Type)

	copy(buf[1:HeadLength], intToBytes(p.Length))
	copy(buf[HeadLength:], data)

	return buf, nil
}

// Decode packet data length byte to int(Big end)
func bytesToInt(b []byte) int {