System.Net.Sock et.Receive(...) bug?

[Saso Zagoranski]

Hi!

I have simple client/server game that uses sockets to transfer different
messages.

The server and the client are running on the same machine.

These are the steps:

1. start the server (I use a TcpListener on port 8080) and wait for messages

byte[] buffer = new byte[4096];

listener = new TcpListener(IPA ddress.Parse("1 27.0.0.1"),8080 );

Socket client = listener.Accept Socket(); // wait for a connection

int size = client.Receive( buffer); // wait for the first message during
client/server initialization

After the first messages is successfully received I send a response to the
client with his new ID and then

this socket is put on another thread.

2. The client side:

IPAddress ipAddress = IPAddress.Parse ("127.0.0.1" );

mainSocket = new
Socket(AddressF amily.InterNetw ork,SocketType. Stream,Protocol Type.Tcp);

mainSocket.Conn ect(new IPEndPoint(ipAd dress,8080));

mainSocket.Send ( buffer ); // the client sends the request

mainSocket.Rece ive(buffer ); // and waits for a response

The problem is that the above code works on some machines and doesn't on
others.

The problem is in the Receive method. Here is what happens:

1.. I start the server
2.. I connect with the client
3.. The server awaits data (the receive method waits)
4.. I send a request from the client
5.. the server DOESN'T GET THE DATA! :(
6.. So the Receive method on the server waits
7.. and because the client expects a response it also hangs in the Receive
method
Netstats shows that there is a connection on port 8080 (I've also tried
other ports).

I've tested 5 machines... It works only on 2. I've turned off firewalls.
These

are all Windows XP SP2 machines... On the 2 that the thing worked I've also

tried communicating over the internet, where the server was somewhere else

and it worked! On the other 3 it doesn't even work locally...

I've even tried sending 5 requests from the client (mainSocket.Sen d(buffer)
x 5) and that

didn't work either.

Is there something wrong with the receive method or am I doing something
wrong?!

PLEASE HELP!

thanks,

saso

[rawCoder]

The machines where u r experieencing problem with Recieve.
Have you tried to Telnet your application?

Also can you listen on an actual IP , like 192.168.0.0 or whatever you have
on your side?

You might also want to see the differences between the two set of machines,
one where its working and one where it is not. May be verify if same version
of patches / involved software are there?

HTH
rawCoder