/// <summary>
/// 检查帧完整性
/// </summary>
/// <param name="package"></param>
/// <returns></returns>
public static bool CheckPackage(Package651 package, out string err)
{
err = "";
if (package.PackageLength < 12)
{
return(false);
}
return(true);
}
/// <summary>
/// 比较两个Package651是否值相等
/// </summary>
/// <param name="pack"></param>
/// <returns></returns>
public bool Equals(Package651 pack)
{
if (this.A5 != pack.A5)
{
return(false);
}
if (this.A4 != pack.A4)
{
return(false);
}
if (this.A3 != pack.A3)
{
return(false);
}
if (this.A2 != pack.A2)
{
return(false);
}
if (this.A1 != pack.A1)
{
return(false);
}
if (this.CenterAddr != pack.CenterAddr)
{
return(false);
}
if (this.PWD[0] != pack.PWD[0])
{
return(false);
}
if (this.PWD[1] != pack.PWD[1])
{
return(false);
}
if (this.FUNCODE != pack.FUNCODE)
{
return(false);
}
if (this.SNum[0] != pack.SNum[0])
{
return(false);
}
if (this.SNum[1] != pack.SNum[1])
{
return(false);
}
if (!PasswordEquals(this.data, pack.data))
{
return(false);
}
return(true);
}
/// <summary>
/// 通过指定的byte[]数组创建帧
/// </summary>
/// <param name="bytes">byte[]数组</param>
/// <param name="result">传出结果</param>
/// <returns>是否成功</returns>
public static bool TryParse(byte[] bytes, out Package651 result, out bool havesubsequent, out string subsequentmsg)
{
havesubsequent = false;
subsequentmsg = "";
try
{
result = FromBytes(bytes, out havesubsequent, out subsequentmsg);
return(true);
}
catch (ArgumentException argex)
{
throw argex;
}
catch (Exception)
{
result = default(Package651);
return(false);
}
}
/// <summary>
/// 获得校验码
/// </summary>
/// <param name="package">帧</param>
/// <returns></returns>
public static byte[] CreateCS(Package651 package)
{
byte[] code;
int sum = PackageDefine.BeginByte651[0] + PackageDefine.BeginByte651[1];
sum = sum + package.CenterAddr;
sum = sum + package.A1 + package.A2 + package.A3 + package.A4 + package.A5;
sum = sum + package.PWD[0] + package.PWD[1];
sum = sum + package.FUNCODE;
sum = sum + (package.IsUpload ? 0x80 : 0x00) + package.L0 + package.L1;
sum = sum + package.CStart;
sum = sum + package.SNum[0] + package.SNum[1];
sum = sum + package.dt[0] + package.dt[1] + package.dt[2] + package.dt[3] + package.dt[4];
sum = sum + package.AddrFlag[0] + package.AddrFlag[1];
sum = sum + package.A1 + package.A2 + package.A3 + package.A4 + package.A5;
if (package.Classific != null)
{
sum = sum + package.Classific;
}
if (package.ObservationFlag != null)
{
sum = sum + package.ObservationFlag[0] + package.ObservationFlag[1];
}
if (package.ObservationTime != null)
{
sum = sum + package.ObservationTime[0] + package.ObservationTime[1] + package.ObservationTime[2] + package.ObservationTime[3] + package.ObservationTime[4];
}
if (package.data != null)
{
foreach (var item in package.data)
{
sum = sum + item;
}
}
code = BitConverter.GetBytes((short)sum);
return(code);
}
/// <summary>
/// 通过指定的Byte[]数组创建帧
/// </summary>
/// <param name="bytes"></param>
/// <returns></returns>
public static Package651 FromBytes(byte[] bytes, out bool ismultipack, out string subsequentmsg)
{
ismultipack = false;
subsequentmsg = "";
if (bytes == null || bytes.Length == 0)
{
throw new ArgumentException("数据为空");
}
Package651 package = new Package651();
if (bytes.Length < PackageDefine.MinLenth651)
{
throw new ArgumentException("数据帧长度低于最短帧");
}
if (bytes[0] != PackageDefine.BeginByte651[0] && bytes[1] != PackageDefine.BeginByte651[1])
{
throw new ArgumentException("未能在开始位找到帧头");
}
package.CenterAddr = bytes[2];
package.A5 = bytes[3];
package.A4 = bytes[4];
package.A3 = bytes[5];
package.A2 = bytes[6];
package.A1 = bytes[7];
package.PWD = new byte[2];
package.PWD[1] = bytes[8];
package.PWD[0] = bytes[9];
package.FUNCODE = bytes[10];
package.IsUpload = (Convert.ToInt16(bytes[11] >> 4) == 8) ? false : true;
package.L1 = (byte)(bytes[11] & (byte)0x0f);
package.L0 = bytes[12];
package.CStart = bytes[13];
package.SNum = new byte[2];
package.dt = new byte[6];
if (package.DataLength > 8)
{
if (package.CStart == PackageDefine.CStart)
{
package.SNum[1] = bytes[14];
package.SNum[0] = bytes[15];
if (bytes.Length - PackageDefine.MinLenth651 != (package.DataLength - 8))
{
throw new ArgumentException("数据长度和数据不匹配");
}
package.dt[0] = bytes[16];
package.dt[1] = bytes[17];
package.dt[2] = bytes[18];
package.dt[3] = bytes[19];
package.dt[4] = bytes[20];
package.dt[5] = bytes[21];
package.data = new byte[package.DataLength - 8];
for (int i = 0; i < (package.DataLength - 8); i++)
{
package.data[i] = bytes[22 + i];
}
}
else if (package.CStart == PackageDefine.CStart_Pack) //多包发送
{
if (bytes.Length - PackageDefine.MinLenth_Pack != package.DataLength)
{
throw new ArgumentException("数据长度和数据不匹配");
}
package.dt[0] = bytes[19];
package.dt[1] = bytes[20];
package.dt[2] = bytes[21];
package.dt[3] = bytes[22];
package.dt[4] = bytes[23];
package.dt[5] = bytes[24];
byte b = (byte)((bytes[14] << 4) | (bytes[15] >> 4));
int pack_l1 = BitConverter.ToInt16(new byte[] { b, (byte)(bytes[14] >> 4) }, 0);
int pack_index = BitConverter.ToInt16(new byte[] { bytes[16], (byte)(bytes[15] & 0x0F) }, 0);
if (pack_l1 != pack_index || pack_l1 > 0)
{
package.SumPackCount = pack_l1;
package.CurPackCount = pack_index;
ismultipack = true;
}
subsequentmsg = "总包数:" + pack_l1 + "、当前第" + pack_index + "包";
if (pack_index != 1) //多包，除了第一包，正文都是数据,比正常的单包或第一包少
{
package.data = new byte[package.DataLength - 3];
for (int i = 0; i < package.DataLength - 3; i++)
{
package.data[i] = bytes[17 + i];
}
}
else
{
package.data = new byte[package.DataLength - 11];
for (int i = 0; i < (package.DataLength - 11); i++)
{
package.data[i] = bytes[25 + i]; //17->24
}
}
}
}
//else if (package.DataLength == 8)
//{
// package.data = new byte[8];
// for (int i = 0; i < 8 && i < bytes.Length; i++)
// {
// package.data[i] = bytes[i + 14];
// }
//}
package.CS = new byte[2];//校验码
package.CS[0] = bytes[bytes.Length - 2];
package.CS[1] = bytes[bytes.Length - 1];
if ((bytes[bytes.Length - 3] != PackageDefine.EndByte651) && (bytes[bytes.Length - 3] != PackageDefine.EndByte_Continue) &&
(bytes[bytes.Length - 3] != PackageDefine.ENQ) && (bytes[bytes.Length - 3] != PackageDefine.EOT) &&
(bytes[bytes.Length - 3] != PackageDefine.ESC))
{
throw new ArgumentException("数据帧不完整或已损坏");
}
byte[] crc_result = crc16(bytes, bytes.Length - 2);
if (crc_result == package.CS)
{
throw new ArgumentException("数据帧校验失败");
}
package.OriginalData = bytes;
return(package);
}
/// <summary>
/// 生成校验码
/// </summary>
/// <returns></returns>
public byte[] CreateCS()
{
return(Package651.CreateCS(this));
}
public SendPackageEntity(Package651 package)
{
this._sendPackage651 = package;
}