Easiest "daytime" service client in Python?
What's the easiest way to write a daytime client in Python? And if there's more data of unknown size but still plain text - how do I read until the server closes the connection? ...
tcp
Delay in multiple TCP connections from Java to the same machine
(See this question in ServerFault) I have a Java client that uses Socket to open concurrent connections to the same machine. I am witnessing a phenomenon where one request completes extremely fast, but the others see a delay of 100-3000 milliseconds. Packet inspection using Wireshark shows all SYN packets beyond the first wait a long ti...
Perl socket programming problems after continuous write to socket
I am using IO::Socket::INET to create socket like this: $lsn1 = IO::Socket::INET->new( PeerAddr => '192.168.0.2', PeerPort => 1850, Proto => 'tcp', Type => SOCK_STREAM ) || die "Can't connect to 192.168.0.2:1850 :...
TCP send/recv error reporting
I have a client/server program (Windows, winsock2) which communicates over TCP. The client connects and sends data to server (using send) in 8K at a time. The server just reads data (using recv). No special settings done on sockets. Problem: When some network error occurs during the communication (e.g. cable pulled out), receiver do no...
TCP Socket Piping
Suppose that you have 2 sockets(each will be listened by other TCP peers) each resides on the same process, how these sockets could be bound, meaning input stream of each other will be bound to output stream of other. Sockets will continuously carry data, no waiting will happen. Normally thread can solve this problem but, rather than cre...
Exception from Lambda Expressions
Strange one that i don't still get, is this: Say, try { stateClient.Socket.BeginSend(messagePrefixed, 0, messagePrefixed.Length, SocketFlags.None, ar => stateClient.Socket.EndSend(ar), stateClient); } catch (SocketException ex) { // Handle SocketException. } catch (ObjectDisposedException ex) { // Handle ObjectDispo...
VB.NET Chat System
Hey guys, I made a simple chat system that connects to a server with a client one on one. I'm not really sure how to get multiple clients with the server so that you can see everyone's messages. Here is the source code. The Server only accepts one client at a time. how can I fix this? Thanks, Kevin ...
Connecting 2 different sub neted computers.
How do I connect 2 different subnet’ed computers? For example sake let’s say the following: 192.168.1.92 connected to externally visible 222.251.155.20. 192.168.1.102 connected to externally visible 223.251.156.23. Now there is middle man server that both machines are connected to so they can negotiate each other’s internal and externa...
VB.NET Chat Server Error...
Hey guys, I recently got into this article. It makes a chat server and people can connect to it like an AIM. The problem how would I disconnect from the server from the client. Because if I close the client application when its connected to the server it will crash the server as well. Please let me know if anyone has any solutions... T...
Twisted ignoring data sent from MUD Clients?
I have the following code (almost an exact copy of the Chat server example listed here: import twisted.scripts.twistd from twisted.protocols import basic from twisted.internet import protocol, reactor from twisted.application import service, internet class MyChat(basic.LineReceiver): def connectionMade(self): print "Got new...
strategy for hit detection over a net connection, like Quake or other FPS games.
I'm learning about the various networking technologies, specifically the protocols UDP and TCP. I've read numerous times that games like Quake use UDP because, "it doesn't matter if you miss a position update packet for a missile or the like, because the next packet will put the missile where it needs to be." This thought process is al...
How to I find out when my WCF server has exited (and closed it TCP connection)
I am using the nettcpbinding binding (with reliably messaging at present). When the server does a serviceHost.Close(), the TCP connection should be cleanly closed and therefore the client side should be told. How do I hook this event with WCF? (Note this is not the same as the TCP connection being closed by a network problem, when re...
TCP Socket Error: Only one usage of each socket address (protocol/network address/port) is normally permitted
Hi. i am developing a small TCP Client/Server lib. i am facing this problem when i create a client and connect it to server. it gives me this exception Only one usage of each socket address (protocol/network address/port) is normally permitted my code is. public TCPClient(string remoteIPAddress, int port) { this...
TCP packet creation
can anybody tell me how to create a TCP packet using C# ???? ...
Tcp connections hang on CLOSE_WAIT status.
Client close the socket first, when there is not much data from server, tcp connection shutdown is okay like: FIN --> <-- ACK <-- FIN, ACK ACK --> When the server is busying sending data: FIN --> <-- ACK,PSH RST --> And the server connection comes to CLOSE_WAIT state and hang on there for a long time. What's the problem ...
How can I stop a thread in C# ?
I've created a Client-Server application, and on the Server I want to have the oportunity to stop the server and then start it again. The problem is that I can't stop the Thread that listen for Tcp Connections. How can I close a Thread in C#? Thanks. private void KeepServer(){ while (this.connected) { tcpClient = tls....
EAGAIN error for accept on blocking socket
I am using a blocking socket to accept connection. I rarely get this error which makes it hard to debug. The accept returns with EAGAIN error. How can that be for a blocking socket? ...
C#: How do I terminate a socket before Socket.BeginReceive calls back?
I have a server that receives connection requests from clients. This server makes use of the asynchronous Socket.BeginReceive and Socket.EndReceive method. The code is pretty similar to the code found here. In my case, after calling Socket.BeginReceive I need a timeout such that if the client hangs on to the connection but does not tra...
BlackBerry - App connects to webservice on simulator, but not on device
hi, i have developed an application, that gets installed in the mobile phone. The brief information of application is it is accessing web services, from another machine. Now i tested the application on the simulator in 2 ways 1) MDS: in the application , there is a url of the machine, where web services are present. this url is in t...
Determine asymmetric latencies in a network
Imagine you have many clustered servers, across many hosts, in a heterogeneous network environment, such that the connections between servers may have wildly varying latencies and bandwidth. You want to build a map of the connections between servers my transferring data between them. Of course, this map may become stale over time as th...