Unity C# 实现自定义Socket通信协议

/// <summary>  
/// 构建消息数据包  
/// </summary>  
/// <param name="Crccode">消息校验码，判断消息开始</param>  
/// <param name="sessionid">用户登录成功之后获得的身份ID</param>  
/// <param name="command">主命令</param>  
/// <param name="subcommand">子命令</param>  
/// <param name="encrypt">加密方式</param>  
/// <param name="MessageBody">消息内容（string数组）</param>  
/// <returns>返回构建完整的数据包</returns>  
public static byte[] BuildDataPackage(int Crccode,long sessionid, int command,int subcommand, int encrypt, string[] MessageBody)  
{  
    //消息校验码默认值为0x99FF  
    Crccode = 65433;  
    //消息头各个分类数据转换为字节数组（非字符型数据需先转换为网络序  HostToNetworkOrder:主机序转网络序）  
    byte[] CrccodeByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(Crccode));  
    byte[] sessionidByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(sessionid));  
    byte[] commandByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(command));  
    byte[] subcommandByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(subcommand));  
    byte[] encryptByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(encrypt));  
    //计算消息体的长度  
    int MessageBodyLength = 0;  
    for (int i = 0; i < MessageBody.Length; i++)  
    {  
        if (MessageBody[i] == "")  
            break;  
        MessageBodyLength += Encoding.UTF8.GetBytes(MessageBody[i]).Length;  
    }  
    //定义消息体的字节数组（消息体长度MessageBodyLength + 每个消息前面有一个int变量记录该消息字节长度）  
    byte[] MessageBodyByte = new byte[MessageBodyLength + MessageBody.Length*4];  

    //记录已经存入消息体数组的字节数，用于下一个消息存入时检索位置  
    int CopyIndex = 0;  
    for (int i = 0; i < MessageBody.Length; i++)  
    {  
        //单个消息  
        byte[] bytes = Encoding.UTF8.GetBytes(MessageBody[i]);  
        //先存入单个消息的长度  
        BitConverter.GetBytes(IPAddress.HostToNetworkOrder(bytes.Length)).CopyTo(MessageBodyByte, CopyIndex);  
        CopyIndex += 4;  
        bytes.CopyTo(MessageBodyByte, CopyIndex);  
        CopyIndex += bytes.Length;  
    }  
    //定义总数据包（消息校验码4字节 + 消息长度4字节 + 身份ID8字节 + 主命令4字节 + 子命令4字节 + 加密方式4字节 + 消息体）  
    byte[] totalByte = new byte[28 + MessageBodyByte.Length];  
    //组合数据包头部（消息校验码4字节 + 消息长度4字节 + 身份ID8字节 + 主命令4字节 + 子命令4字节 + 加密方式4字节）  
    CrccodeByte.CopyTo(totalByte,0);  
    BitConverter.GetBytes(IPAddress.HostToNetworkOrder(MessageBodyByte.Length)).CopyTo(totalByte,4);  
    sessionidByte.CopyTo(totalByte, 8);  
    commandByte.CopyTo(totalByte, 16);  
    subcommandByte.CopyTo(totalByte, 20);  
    encryptByte.CopyTo(totalByte, 24);  
    //组合数据包体  
    MessageBodyByte.CopyTo(totalByte,28);  
    Debug.Log("发送数据包的总长度为："+ totalByte.Length);  
    return totalByte;  
}  
///<summary>  
///发送信息  
///</summary>  
public static void SendMessage(byte[] sendBytes)