Hi! all, I have written a simple udp server which has to transmit certain data to few of it's clients. but though server is successfully executing send,but unable to transmit even a single byte.The return value of send is 0 although I have enough data to be transmitted.you can see the code for the said server here: http://pastebin.com/ze...
how do i add SOCKS support to my application? and where can i get the libs? ...
I have written two simple programs (tried it in C++ and C#). This is pseudo code: -------- Client --------------- for(int i = 0; i < 200.000; i++) { socket_send("ping") socket_receive(buff) } --------- Server ------------- while(1) { socket_receive(buff) socket_send("pong") } I tried ...
I got the following exception: Exception Type: System.InvalidOperationException Exception Message: The Undo operation encountered a context that is different from what was applied in the corresponding Set operation. The possible cause is that a context was Set on the thread and not reverted(undone). Exception Stack: at System.Threadin...
Hello. I'm trying to develop a simple IRC bot. First I want to think out a proper design for this project. One of the things I'm wondering about right now is the read mechanism. I develop this bot on a Linux system. (Fedora 12) To read from a socket I use the system call "read()". I plan to use the reading functionality in the following...
REMOVED - reason: not really needed. my questions are: can I use a linux UDP socket from two different threads? answer was here I have two different events I would like to wait for using just one thread. One of such events is the addition of an element to a stack and another is the availability of data on a socket. I can use a boost::...
I need to poll a server, which is running some propriatary software, to determine if this service is running. Using wireshark, I've been able to narrow down the TCP port its using, but it appears that the traffic is encrypted. In my case, its a safe bet that if the server is accepting connections (i.e. telnet serverName 1234) the servic...
Hello, I created a chat application and seems to work just fine except that it takes up 100% cpu. Can this loop take out 100% Cpu? If yes, then what do i do to overcome it? @Override public void run(){ try { _objServerSocket = new ServerSocket(17001, 500); while (true) { try { ...
I have a android app that is communicating with a server (written in java). Between these two parts I have established a Socket connection and want to send data. The problem I am having is that sometimes, for some users, the information that reaches the server is null. This works (for all phones, all users): Server: int a = Integer....
Well, I know its possible, using external libraries and modules such as scapy. But how about without external modules? Without running the script as root? No external dependencies? I've been doing a lot of googling, but haven't found much help. I'd like to be able to create my own packets, but without running as root, or installing extr...
We have an async socket server written in C#. (running on Windows Web Server 2008) It works flawlessly up until it stop accepting new connections for an unknown reason. We have about 200 concurrent connections on average, however we keep a count of both connections created and connections dropped. These figures can reach as high as 10...
I'm looking at building a Cocoa application on the Mac with a back-end daemon process (really just a mostly-headless Cocoa app, probably), along with 0 or more "client" applications running locally (although if possible I'd like to support remote clients as well; the remote clients would only ever be other Macs or iPhone OS devices). Th...
I have to communicate with an iPhone. I have its IP Address and the port (obtained via Bonjour). I need to send a header that is “0x50544833” (or similar, It’s an HEX number), then the size of the data (below) and then the data itself. The data is just a string that looks like this: <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE pl...
.NET 2.0 provides only the System.Net.Security.SslStream class for secure sockets in .NET 2.0 and higher, but this uses the Stream interface, which provides the blocking Read/Write members and asynchronous Begin{Read,Write} members. I'm looking for a class that provides functionality similar to System.Net.Sockets.Socket. Specifically, s...
I am wondering if a typical while(true) ServerSocket listen loop takes an entire core to wait and accept a client connection (Even when implementing runnable and using Thread .start()) I am implementing a type of distributed computing cluster and each computer needs every core it has for computation. A Master node needs to communicate w...
I am trying to implement a real-time application which involves IPC across different modules. The modules are doing some data intensive processing. I am using message queue as the backbone(Activemq) for IPC in the prototype, which is easy(considering I am a totally IPC newbie), but it's very very slow. Here is my situation: I have i...
I am using domain socket to get values from another process, like A to get a value from B, It works well for months. But recently, A is failed during "sendto" message to B with "errno 111, connection refused" occasionally. I checked the B domain socket bind file, it is exists. I also do some tests in another machine, also works well. S...
Hi all, I am implementing a simulated b/s stock data system. I am using flex and c# for client and server sides. I found flash has a security policy and I handled the policy-file-request in my server code. But seems it doesn't work, because the code jumped out at "socket.Receive(b)" after connection. I've tried sending message on client ...
Hi, I am trying to broadcast a message through the Node.js service socket.io (http://socket.io/) to certain subset of all subscribers. To be more exact, I would like to use channels that users can subscribe to, in order to efficiently push messages to a couple hundred people at the same time. I'm not really sure if addEvent('channel_nam...
I have written a proxy server for Linux using Poco but have since been reading up on the various approaches to achieving TCP/IP server scalability. I will need the server to handle persistent connections (not HTTP traffic) with an upper limit of about 250 simultaneous connections. Each connection typically uses about 5-10Kb/sec and the b...