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namespace HslCommunication.Core.IMessage
{
/// <summary>
/// 西门子S7协议的消息解析规则
/// </summary>
public class S7Message : INetMessage
{
/// <summary>
/// 西门子头字节的长度
/// </summary>
public int ProtocolHeadBytesLength
{
get { return 4; }
}
/// <summary>
/// 头子节的数据
/// </summary>
public byte[] HeadBytes { get; set; }
/// <summary>
/// 内容字节的数据
/// </summary>
public byte[] ContentBytes { get; set; }
/// <summary>
/// 检查头子节是否合法的判断
/// </summary>
/// <param name="token">令牌</param>
/// <returns>是否合法的</returns>
public bool CheckHeadBytesLegal(byte[] token)
{
if (HeadBytes == null) return false;
if (HeadBytes[0] == 0x03 && HeadBytes[1] == 0x00)
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// 获取剩余的内容长度
/// </summary>
/// <returns>数据内容长度</returns>
public int GetContentLengthByHeadBytes()
{
if (HeadBytes?.Length >= 4)
{
return HeadBytes[2] * 256 + HeadBytes[3] - 4;
}
else
{
return 0;
}
}
/// <summary>
/// 获取消息号，此处无效
/// </summary>
/// <returns>消息标识</returns>
public int GetHeadBytesIdentity()
{
return 0;
}
/// <summary>
/// 发送的字节信息
/// </summary>
public byte[] SendBytes { get; set; }
}
}
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