96 lines
2.2 KiB
C#
96 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace MECF.Framework.RT.Core.IoProviders.Siemens.IMessage
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{
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/// <summary>
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/// 西门子Fetch/Write消息解析协议
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/// </summary>
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public class FetchWriteMessage : INetMessage
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{
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/// <summary>
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/// 消息头的指令长度
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/// </summary>
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public int ProtocolHeadBytesLength
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{
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get
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{
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return 16;
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}
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}
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/// <summary>
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/// 从当前的头子节文件中提取出接下来需要接收的数据长度
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/// </summary>
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/// <returns>返回接下来的数据内容长度</returns>
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public int GetContentLengthByHeadBytes( )
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{
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if (SendBytes != null)
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{
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if (HeadBytes[5] == 0x04)
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{
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return 0;
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}
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else
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{
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return SendBytes[12] * 256 + SendBytes[13];
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}
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}
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else
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{
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return 16;
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}
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}
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/// <summary>
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/// 检查头子节的合法性
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/// </summary>
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/// <param name="token">特殊的令牌，有些特殊消息的验证</param>
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/// <returns>是否合法</returns>
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public bool CheckHeadBytesLegal( byte[] token )
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{
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if (HeadBytes == null) return false;
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if (HeadBytes[0] == 0x53 && HeadBytes[1] == 0x35)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/// <summary>
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/// 获取头子节里的消息标识
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/// </summary>
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/// <returns>消息标识</returns>
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public int GetHeadBytesIdentity( )
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{
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return HeadBytes[3];
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}
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/// <summary>
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/// 消息头字节
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/// </summary>
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public byte[] HeadBytes { get; set; }
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/// <summary>
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/// 消息内容字节
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/// </summary>
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public byte[] ContentBytes { get; set; }
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/// <summary>
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/// 发送的字节信息
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/// </summary>
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public byte[] SendBytes { get; set; }
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}
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}
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