public void Send(VarPacket packet)
{
Task.Run(() =>
{
CommsEventArgs args = null;
try
{
using (var client = new TcpClient(packet.EndPoint.Address.ToString(), packet.EndPoint.Port)
{
NoDelay = this.NoDelay
})
using (var s = client.GetStream())
{
s.Write(packet.Data, 0, packet.Data.Length);
s.Flush();
args = new CommsEventArgs(packet, LocalEndPoint, null);
_listenerThread.Report(Tuple.Create(args, true, (VarPacket)null));
if (packet.IsReadRequest)
{
var data = _ReadPacketData(s);
VarPacket p = null;
try
{
p = VarPacket.CreateReceived(this, LocalEndPoint, data);
}
catch (ArgumentException ex)
{
args = new CommsEventArgs(p, client.Client.RemoteEndPoint as IPEndPoint, ex.Message);
_listenerThread.Report(Tuple.Create(args, false, (VarPacket)null));
return;
}
args = new CommsEventArgs(p, client.Client.RemoteEndPoint as IPEndPoint, p.IsReadResponse ? null : "Wrong packet type received.");
_listenerThread.Report(Tuple.Create(args, false, (VarPacket)null));
}
}
}
catch (Exception ex)
{
args = new CommsEventArgs(packet, LocalEndPoint, ex.Message);
_listenerThread.Report(Tuple.Create(args, true, (VarPacket)null));
}
});
}
public static VarPacket CreateReadResponse(object owner, IPEndPoint endPoint, List <decimal> varValues)
{
if (endPoint == null)
{
throw new ArgumentNullException();
}
var p = new VarPacket()
{
EndPoint = endPoint, Owner = owner
};
int index = 0;
if (varValues == null)
{
p.Data = new byte[9];
p.Data.WriteAt(BitConverter.GetBytes(9), ref index);
p.Data[4] = 1;
++index;
p.Data.WriteAt(BitConverter.GetBytes(0), ref index);
}
else
{
int len = 9 + (varValues.Count << 4);
p.Data = new byte[len];
p.Data.WriteAt(BitConverter.GetBytes(len), ref index);
p.Data[4] = 1;
++index;
p.Data.WriteAt(BitConverter.GetBytes(varValues.Count), ref index);
for (int i = 0; i < varValues.Count; ++i)
{
p.Data.WriteAt(DecimalConverter.GetBytes(varValues[i]), ref index);
}
}
return(p);
}
public static VarPacket CreateWriteRequest(object owner, IPEndPoint endPoint, List <string> varNames, decimal value)
{
if (endPoint == null || varNames == null)
{
throw new ArgumentNullException();
}
var p = new VarPacket()
{
EndPoint = endPoint, Owner = owner
};
int len = 25 + (varNames.Count << 2);
for (int i = 0; i < varNames.Count; ++i)
{
len += (sizeof(char) * varNames[i].Length);
}
int index = 0;
p.Data = new byte[len];
p.Data.WriteAt(BitConverter.GetBytes(len), ref index);
p.Data[4] = 2;
++index;
p.Data.WriteAt(BitConverter.GetBytes(varNames.Count), ref index);
for (int i = 0; i < varNames.Count; ++i)
{
p.Data.WriteAt(BitConverter.GetBytes(varNames[i].Length * sizeof(char)), ref index);
p.Data.WriteAt(varNames[i].ToCharArray(), ref index);
}
p.Data.WriteAt(DecimalConverter.GetBytes(value), ref index);
return(p);
}
public CommsEventArgs(VarPacket packet, IPEndPoint source, string msg)
{
Packet = packet;
Source = source;
Msg = msg;
}
public static VarPacket CreateReceived(object owner, IPEndPoint endPoint, byte[] data)
{
if (endPoint == null || data == null)
{
throw new ArgumentNullException();
}
if (data.Length < 9)
{
throw new ArgumentException("Wrong packet size.");
}
var p = new VarPacket()
{
EndPoint = endPoint, Owner = owner
};
int len = BitConverter.ToInt32(data, 0);
if (data.Length != len)
{
throw new ArgumentException("Wrong packet size.");
}
if (data[4] > 2)
{
throw new ArgumentException("Wrong packet type.");
}
int varCount = BitConverter.ToInt32(data, 5);
if (data[4] == 0)
{
int index = 9;
for (int i = 0; i < varCount; ++i)
{
int nlen = BitConverter.ToInt32(data, index);
index += 4 + nlen;
if (index > len)
{
throw new ArgumentException("Wrong packet size.");
}
}
if (index != len)
{
throw new ArgumentException("Wrong packet size.");
}
}
else if (data[4] == 1)
{
int index = 9 + (varCount << 4);
if (index != len)
{
throw new ArgumentException("Wrong packet size.");
}
}
else
{
int index = 9;
for (int i = 0; i < varCount; ++i)
{
int nlen = BitConverter.ToInt32(data, index);
index += 4 + nlen;
if (index > len)
{
throw new ArgumentException("Wrong packet size.");
}
}
if (index + 16 != len)
{
throw new ArgumentException("Wrong packet size.");
}
}
p.Data = data;
return(p);
}
