public DNP3UserLayerHandler(DNP3Handler dNP3Handler)
{
if (dNP3Handler == null)
{
throw new ArgumentNullException();
}
this.dNP3Handler = dNP3Handler;
}
public CommunicationEngine(string address, int port)
{
DNP3Handler = new DNP3Handler();
IPAddress ipAddress = IPAddress.Parse(address);
server = new TcpListener(ipAddress, port);
server.Start();
Task.Factory.StartNew(() => ProcessRequests());
}
public DNP3UserLayerHandler(DNP3Handler dNP3Handler, DBContext database)
{
if (dNP3Handler == null)
{
throw new ArgumentNullException();
}
if (database == null)
{
throw new ArgumentNullException();
}
this.dNP3Handler = dNP3Handler;
this.database = database;
}
void ProcessRequest(TcpClient client)
{
DataLinkHandler dataLinkHandler = new DataLinkHandler();
Byte[] bytes = new Byte[1000];
NetworkStream stream = client.GetStream();
byte actualLen = 0;
int i = 0;
while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
{
byte len = bytes[2];
actualLen = (byte)(2 + 1 + 5 + 2); // start + len + ctrl + dest + source + crc
len -= 5; // minus header
while (len > 0)
{
if (len < 16)
{
// last chunk
actualLen += (byte)(len + 2);
break;
}
actualLen += (byte)(16 + 2);
len -= 16;
}
byte[] message = new byte[actualLen];
for (i = 0; i < actualLen; i++)
{
message[i] = bytes[i];
}
List <UserLevelObject> userLevelObjects = dataLinkHandler.PackUp(message);
if (userLevelObjects == null)
{
continue;
}
DNP3Handler dNP3Handler = new DNP3Handler();
DNP3UserLayerHandler userLayer = new DNP3UserLayerHandler(dNP3Handler);
List <byte[]> segments = userLayer.ReadAllAnalogInputPointsResponse(userLevelObjects);
int offset = 0;
foreach (byte[] segment in segments)
{
try
{
stream.Write(segment, offset, segment.Count());
}
catch (Exception e) { }
}
}
}
