public override bool Parse(BinaryReader br)
{
MemoryStream ms = null;
BinaryReader brr = null;
try
{
if (br.ReadUInt16() != Tag)
{
throw new Exception("包头标记错误");
}
var len = br.ReadUInt16();
var crc = br.ReadUInt32();
var bytes = br.ReadBytes((int)len - 8);
if (Crc32.Compute(bytes) != crc)
{
throw new Exception("crc32校验错误。");
}
ms = new MemoryStream(bytes);
ms.Position = 0;
brr = new BinaryReader(ms);
Seq_Id = brr.ReadUInt32();
Comm_Type = (CommunicationType)brr.ReadByte();
Enc_Type = (EncryptionType)brr.ReadByte();
Major_Ver = brr.ReadByte();
Minor_Ver = brr.ReadByte();
Term_Code = brr.ReadStingWithFixLength(12);
var Serv_Type = (ServiceType)brr.ReadUInt16();
var Serv_Code = brr.ReadUInt16();
// IPAddress = brr.ReadBytes(4);
// Port = brr.ReadUInt16();
// MAC_Addr = brr.ReadBytes(6);
Flags = (TPKGHeadFlags)brr.ReadByte();
Priority = brr.ReadByte();
Reserved = brr.ReadUInt32();
Data = PacketFactory.Create(brr, Serv_Type, Serv_Code); //解析数据域，根据服务类型和服务代码确定是哪个具体功能
if (Flags.HasFlag(TPKGHeadFlags.SIDV)) //附加域
{
SessionId = brr.ReadUInt32();
}
if (Flags.HasFlag(TPKGHeadFlags.PWV))
{
Password = brr.ReadStingWithFixLength(16);
}
if (Flags.HasFlag(TPKGHeadFlags.TPV))
{
var t = brr.ReadBytes(6);
Timestamp = new DateTime(t[5], t[4], t[3], t[2], t[1], t[0]);
Expire_time = brr.ReadInt32();
}
return(true);
}
catch (Exception e)
{
log.Error(e);
return(false);
}
finally
{
if (brr != null)
#if WindowsCE
{ brr.Close(); }
#else
{ brr.Dispose(); }
#endif
if (ms != null)
{
ms.Dispose();
}
}
}
public override bool ToBytes(BinaryWriter bw)
{
MemoryStream ms = new MemoryStream();
try
{
BinaryWriter bww = new BinaryWriter(ms);
//bww.Write(Tag);
bww.Write(Seq_Id);
bww.Write((byte)Comm_Type);
bww.Write((byte)Enc_Type);
bww.Write(Major_Ver);
bww.Write(Minor_Ver);
bww.WriteStingWithFixLength(Term_Code, 12);
bww.Write((ushort)Serv_Type);
bww.Write((ushort)Serv_Code);
// bww.WriteBytesWithFixLength(IPAddress, 4);
// bww.Write(Port);
// bww.WriteBytesWithFixLength(MAC_Addr, 6);
bww.Write((byte)Flags);
bww.Write(Priority);
bww.Write(Reserved);
if (Data != null)
{
Data.ToBytes(bww);
}
if (Flags.HasFlag(TPKGHeadFlags.SIDV))
{
bww.Write(SessionId ?? 0);
}
if (Flags.HasFlag(TPKGHeadFlags.PWV))
{
bww.WriteStingWithFixLength(Password, 16);
}
if (Flags.HasFlag(TPKGHeadFlags.TPV))
{
bww.Write(new byte[] {
(byte)(Timestamp?.Second ?? 0),
(byte)(Timestamp?.Minute ?? 0),
(byte)(Timestamp?.Hour ?? 0),
(byte)(Timestamp?.Day ?? 0),
(byte)(Timestamp?.Minute ?? 0),
(byte)(Timestamp?.Year ?? 0),
});
bww.Write(Expire_time ?? 0);
}
var bytes = ms.ToArray();
ms.Dispose();
bw.Write(Tag);
bw.Write((ushort)(bytes.Length + 8));
bw.Write(Crc32.Compute(bytes));
bw.Write(bytes);
return(true);
}
catch (Exception e)
{
log.Error(e);
return(false);
}
finally
{
if (ms != null)
{
ms.Dispose();
}
}
}
