Help me received Data

I'm a client :
public class GuiTestCS : MonoBehaviour {
Socket sock;
void Start ()
{
IPAddress host = IPAddress.Parse("10.4.2.215");
IPEndPoint hostip = new IPEndPoint(host, 3333);
sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
sock.Connect(hostip);
print("Connected successful");
}
catch (SocketException e)
{
print("Problem connecting to host");
print(e.ToString());
return;
}
string message = "HungKV\n";
sock.Send(Encoding.ASCII.GetBytes(message));
byte[] data = new byte[1024];
int receivedDataLength = sock.Receive(data);
string stringData = Encoding.ASCII.GetString(data, 0, receivedDataLength);
}
void Update () {
}
}

I can connect to server, send message to server, but i can't receive message form server.
(It hang when receive message)
Someone help me
thanks!

 

I just test, and got the same situation.

But sometime, I can receive messages from server when I change sent message.

Anyone know about this?

//===========
//edit

I see Server send char '0' after message need to send, so it makes infinite loop at socket.Receive(buffer) => hang Unity.

 

In this case sockets in unity work in blocking mode. If i type socket.blocking=false i have an error

 

http://www.unifycommunity.com/wiki/index.php?title=Simple_TCP/IP_Client_-_Server

Maybe that will help.