using System; namespace HslCommunication.Core.IMessage { /// <summary> /// 用于欧姆龙通信的Fins协议的消息解析规则 /// </summary> public class FinsMessage : INetMessage { /// <summary> /// 消息头的指令长度 /// </summary> public int ProtocolHeadBytesLength { get { return 8; } } /// <summary> /// 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 /// </summary> /// <returns>返回接下来的数据内容长度</returns> public int GetContentLengthByHeadBytes() { byte[] buffer = new byte[4]; buffer[0] = HeadBytes[7]; buffer[1] = HeadBytes[6]; buffer[2] = HeadBytes[5]; buffer[3] = HeadBytes[4]; return BitConverter.ToInt32(buffer, 0); } /// <summary> /// 检查头子节的合法性 /// </summary> /// <param name="token">特殊的令牌,有些特殊消息的验证</param> /// <returns>是否成功的结果</returns> public bool CheckHeadBytesLegal(byte[] token) { if (HeadBytes == null) return false; if (HeadBytes[0] == 0x46 && HeadBytes[1] == 0x49 && HeadBytes[2] == 0x4E && HeadBytes[3] == 0x53) { return true; } else { return false; } } /// <summary> /// 获取头子节里的消息标识 /// </summary> /// <returns>消息id</returns> public int GetHeadBytesIdentity() { return 0; } /// <summary> /// 消息头字节 /// </summary> public byte[] HeadBytes { get; set; } /// <summary> /// 消息内容字节 /// </summary> public byte[] ContentBytes { get; set; } /// <summary> /// 发送的字节信息 /// </summary> public byte[] SendBytes { get; set; } } }