func PacketData(seqId uint64, data []byte) []byte {
writer := packet.Writer()
//size uint16
writer.WriteU16(uint16(len(data)))
//crc32 uint32
crc32 := crc32.Checksum(data, crc32.IEEETable)
writer.WriteU32(crc32)
//seqid uint64
writer.WriteU64(seqId)
//data (uid + msgid + msgpack)
writer.WriteRawBytes(data)
return writer.Data()
}
func encode(uid uint64, msgid int32, reCode int32, _ack interface{}) []byte {
var mh codec.MsgpackHandle
var out []byte
mh.EncodeOptions.StructToArray = true
encode := codec.NewEncoderBytes(&out, &mh)
encode.Encode(_ack)
writer := packet.Writer()
//计算包的长度
writer.WriteU64(uid)
writer.WriteS32(msgid)
writer.WriteS32(reCode)
writer.WriteRawBytes(out)
return writer.Data()
}