On Sun, Nov 25, 2012 at 11:23 AM, Bastian v.d Boomgaard
<bastian...@gmail.com> wrote:
> I'm sending messages trough a socket connection to a device. The device
> sends a message on which i need to respond.
>
> This is my code for opening a socket connection:
>
> var lPORT = 4102;
> // Create a server instance, and chain the listen function to it
> net.createServer(function(sock) {
>
> // We have a connection - a socket object is assigned to the
> connection automatically
> console.log('TCP LISTENER hearing on: ' + sock.remoteAddress +':'+
> sock.remotePort);
>
> // Event handler: incoming data
> sock.on('data', function(data) {
> sock.allowHalfOpen = true;
> sock.pipe(sock);
> var sockwrite = sock.write(data+'\r\n');
> if (sockwrite == true) {
> console.log(''+data);
> }
>
> // Write incoming messages to logfile.
> var log = fs.createWriteStream('pin.log', {'flags': 'a'});
> log.write(data+'\n\r\n\r');
>
> // Push incoming messages to client
> io.of('/process').emit( 'broadcast_msg', ''+data);
>
> });
>
> // Event handler: close connection
> sock.on('close', function(data) {
> console.log('[LISTENER] Connection paused.');
> });
>
> }).listen(lPORT);
>
> Beneath is the code for connecting to that socket connection and sending the
> data. But that data is not physicly send to the socket, i checked this with
> wireshark. The message send from this code is not send.
>
> var returnsock = net.createConnection(4102, function() {
> returnsock.write(msg);
> });
>
>
> The point is, that the data send from "returnsock.write(msg);" **does** come
> trough in the code above, i can see that when i view my console.log. So,
> "var sockwrite = sock.write(data+'\r\n');" comes back with "true".
>
> My question is: Why is the data that is send from "returnsock.write(msg)"
> come tru to the server, but is not send inside the socket with "var
> sockwrite = sock.write(data+'\r\n')"?
You mean why you don't see any traffic in wireshark? Probably because
you're monitoring the wrong interface or your capture rule doesn't
actually catch the right traffic.
Try tracing syscalls instead. There's strace on Linux and dtruss on
OS X, Solaris and the BSDs.
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