TCP Bidirectional connection from PC to Device

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I am trying to connect to Datalogic Memor from my desktop using TCP connection. I wrote a small client to run on the device

anda server that runs on the PC. I have ActiveSync installed on mymachine. All I am trying to do is send some string data from my deviceto my application on the PC. I was told that one of the requirementswas that we can't ask clients to open any ports on their PCs.

 

Hencethey asked me to see if I can initiate the connection from the PC andhave the server running on the device, and send all the required dataas a response, that way I may be able to avoid opening the connections.

 

IfI try to do that, I simply can't connect to my device using TCP IP. Theerror I get basically says that it can't find the device using thespecified IP. If I go to cmd prompt and use IPCONFIG on the device, itshows me 192.168.55.101 as the IP. If I try to ping it from my PC, myrequests get timed out.

 

Everything works fine if I use mydevice as a client and PC as a server, but the problem with that is Iwill need to specify port

in order to establish a connection and we are not supposed to do that.

 

I searched on the web to find anything that will let me connect to the device and send the data to the device but apart from

TCP IP I couldn't really get much.

 

 

Here's the client code on my PC that fails to connect to my server on the device.

 

TcpClient tcpClient = new TcpClient();

*********** tcpClient.Connect("192.168.55.101", 8000);

*********** NetworkStream networkStream = tcpClient.GetStream();

*********** if (networkStream.CanWrite && networkStream.CanRead)

*********** {

*************** //' Do a simple write.

*************** Byte[] sendBytes = Encoding.ASCII.GetBytes("Sample string");

*************** networkStream.Write(sendBytes, 0, sendBytes.Length);

*************** // Read the NetworkStream into a byte buffer.***********

*************** byte[] bytes = new byte[tcpClient.ReceiveBufferSize];

*************** networkStream.Read(bytes, 0, Convert.ToInt32(tcpClient.ReceiveBufferSize));

*************** // Output the data received from the host to the console.

*************** string returndata = Encoding.ASCII.GetString(bytes);

*************** MessageBox.Show("Server returned: " + returndata);

*********** }

//tcpClient.Close();

 

Here's the server code:

*********** int portNumber = 8000;

*********** TcpListener tcpListener = new TcpListener(IPAddress.Any, portNumber);

*********** tcpListener.Start();

*********** MessageBox.Show("Waiting for connection...");

*********** try

*********** {

*************** //a TcpClient initialized for communication.

*************** TcpClient tcpClient = tcpListener.AcceptTcpClient();

*************** MessageBox.Show("Connection accepted.");

*************** // Get the stream

*************** NetworkStream networkStream = tcpClient.GetStream();

*************** // Read the stream into a byte array

*************** byte[] bytes = new byte[tcpClient.ReceiveBufferSize];

*************** networkStream.Read(bytes, 0, Convert.ToInt32(tcpClient.ReceiveBufferSize));

*************** // Return the data received from the client to the console.

*************** string clientdata = Encoding.ASCII.GetString(bytes, 0, Convert.ToInt32(tcpClient.ReceiveBufferSize));

*************** MessageBox.Show("Client data: " + clientdata);

*************** string responseString = "Connected to server.";

*************** Byte[] sendBytes = Encoding.ASCII.GetBytes(responseString);

*************** networkStream.Write(sendBytes, 0, sendBytes.Length);

*************** MessageBox.Show(("Message Sent: " + responseString));

************* //Close TcpListener and TcpClient.

*************** tcpClient.Close();

*************** tcpListener.Stop();

*********** }

*********** catch (Exception ex)

*********** {

*************** MessageBox.Show(ex.Message);

*********** }**********

 

Pleaselet me know if you know any efficient way to achieve data transfer fromdevice to PC using TCP either with a bidirectional connection or ifthere is any better way to achieve this by any different means.

 

Thanks

 

 

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