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POC# An existing connection was forcibly closed by the remote host: socket programming
 

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  1. POC# An existing connection was forcibly closed by the remote host: socket programming
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    <p>I am working with sockets. Here are my codes (the description of problem is further):</p> <p><strong>Client side</strong>:</p> <pre><code> public void ReadCallback(IAsyncResult ar) { int fileNameLen = 1; String content = String.Empty; StateObject state = (StateObject)ar.AsyncState; Socket handler = state.workSocket; int bytesRead = handler.EndReceive(ar); if (bytesRead &gt; 0) { if (flag == 0) { fileNameLen = BitConverter.ToInt32(state.buffer, 0); string fileName = Encoding.UTF8.GetString(state.buffer, 4, fileNameLen); receivedPath = mypath + @"XML\"; if (!Directory.Exists(receivedPath)) { Directory.CreateDirectory(receivedPath); } receivedPath = receivedPath + fileName; flag++; } if (flag &gt;= 1) { BinaryWriter writer = new BinaryWriter(File.Open(receivedPath, FileMode.Append)); if (flag == 1) { writer.Write(state.buffer, 4 + fileNameLen, bytesRead - (4 + fileNameLen)); flag++; } else writer.Write(state.buffer, 0, bytesRead); writer.Close(); handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state); } } else { // Invoke(new MyDelegate(LabelWriter)); } } </code></pre> <p>I get error on this line: <code>int bytesRead = handler.EndReceive(ar);</code></p> <p>How can I avoid this error?: <code>An existing connection was forcibly closed by the remote host</code></p> <p><strong>Server side</strong>:</p> <pre><code> public void ReadCallback(IAsyncResult ar) { try { int fileNameLen = 1; String content = String.Empty; StateObject state = (StateObject)ar.AsyncState; Socket handler = state.workSocket; string[] str = new string[2]; str = handler.RemoteEndPoint.ToString().Split(':'); IP = str[0].ToString(); int bytesRead = handler.EndReceive(ar); if (bytesRead &gt; 0) { if (flag == 0) { fileNameLen = BitConverter.ToInt32(state.buffer, 0); string fileName = Encoding.UTF8.GetString(state.buffer, 4, fileNameLen); string[] getIP = new string[3]; getIP = fileName.Split('_'); #region Send Files in HandHeld #region GetLoginFile if (getIP[1].ToString().Equals("GetLoginFile")) { string getDirectory = @"Send_Hand_Held_Files\" + DateTime.Today.ToString("dd-MM-yyyy") + "\\" + getIP[0].ToString() + "\\XML"; string strmyFile = getDirectory + "\\Login.xml"; char[] delimiter = splitter.ToCharArray(); split = strmyFile.Split(delimiter); int limit = split.Length; fName = split[limit - 1].ToString(); byte[] LoginfileName = Encoding.UTF8.GetBytes(fName); //file name byte[] fileData = File.ReadAllBytes(strmyFile); byte[] LoginfileNameLen = BitConverter.GetBytes(LoginfileName.Length); //lenght of file name clientData = new byte[4 + LoginfileName.Length + fileData.Length]; LoginfileNameLen.CopyTo(clientData, 0); LoginfileName.CopyTo(clientData, 4); fileData.CopyTo(clientData, 4 + LoginfileName.Length); handler.BeginSend(clientData, 0, clientData.Length, 0, new AsyncCallback(SendCallBack), handler); //handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, //new AsyncCallback(ReadCallback), state); return; } } catch (Exception ex) { MessageBox.Show(ex.Message); } //SendData(IP); } private static void SendCallBack(IAsyncResult ar) { try { // Retrieve the socket from the state object. Socket client = (Socket)ar.AsyncState; // Complete sending the data to the remote device. // int bytesSent = client.EndSend(ar); //Console.WriteLine("Sent {0} bytes to server.", bytesSent); // Signal that all bytes have been sent. allDone.Set(); } catch (Exception e) { Console.WriteLine(e.ToString()); } } </code></pre>
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    1. USEmaad Ali
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      1. POC# An existing connection was forcibly closed by the remote host: socket programming
      1. USDavid Hoerster
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      1. POC# An existing connection was forcibly closed by the remote host: socket programming
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    1. COUhm... don't forcibly close the connection on the remote host?
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      1. POC# An existing connection was forcibly closed by the remote host: socket programming
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    2. COAre you the only client accessing the server? Could it be that the server has exceeded the number of connections allowed? If you have access to the server code, do you know if it's getting called?
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      1. POC# An existing connection was forcibly closed by the remote host: socket programming
      1. USDavid Hoerster
    3. COthere other clients are available who can access server.
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      1. POC# An existing connection was forcibly closed by the remote host: socket programming
      1. USEmaad Ali
 

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