For making a scalable multiuser server in C#, which of these two types of servers are more efficient? You can see an example of the async server using the begin* methods (like beginaccept, beginsend) here, and the threadpool implementation here. I know what a threadpool is and how it works so I pretty much understand how that implement...
I do alot of programming in *nix using C gcc. I know how to do a basic gethostbyname(). BUt what if I wanted to pull down the entire DNS record. More to the point, is there a function that I'm missing that allows you to specify the specific record that you want to pull? Or will I need to do this manually through a UDP socket? ...
I am trying to create a simple C# app which does port forwarding, and need to know how to use the IP_HDRINCL socket option to try to fake out the receiving end to think the connection is really to the source. Any examples would be greatly appreciated. ...
I was wondering if anyone knew of a tool where I could send a fully formed HTTP body ( headers & content ) to a web server. So far the best I've got is putty but was hoping for something where I could look @ and edit the payload then click a button and send it. ( I could probably write something like this in a couple minutes but was ho...
Quick question here: is there any obvious benefit to use asynchronous communication with the NetworkStream class (generated by TcpClient), i.e. the BeginRead/BeginWrite methods rather than running a separate thread and using synchronous operations on that, i.e. Read/Write? My impression has been (it could easily be quite wrong) that the ...
I am writing a small Java server, and a matching client in C++, which implement a simple IM service over the STOMP protocol. The protocol specifies that every frame (message that passes between server and client, if you will) must end with a null character, which in code I refer to as '\0', both in Java and in C++. However, when I tran...
I'm trying to use select on STDIN and a TCP socket in Ruby, but for some reason, the value returned from select never seems to match one of the choices; it looks like it's the socket that's being returned, but it doesn't match using == (or equal?). Can anyone tell me why the result returned from select doesn't match the objects I passed ...
I have some applications, and standard Unix tools sending their output to named-pipes in Solaris, however named pipes can only be read from the local storage (on Solaris), so I can't access them from over the network or place the pipes on an NFS storage for networked access to their output. Which got me wondering if there was an analogo...
I wrote this program in C++ and on Linux platform. I wrote a client and server socket program. In that client program, I wrote socket function and immediately after that I am doing some other actions not at all depending on socket (I wrote 2 for loops for some other logic). After that I prepared the structures required for the socket ...
I am writing a server program in C wherein every time a client connects, I create a new pthread to handle the client's requests. When all of the threads exit, however, then my program exits, as though a call to exit() has been made. This is a problem - how can I overcome it? Lets say the server is running, and 2 clients connect. Once t...
I'm learning C# asynchronous socket programming, and I've learned that it's a good idea to reuse byte buffers in some sort of pool, and then just check one out as needed when receiving data from a socket. However, I have seen two different methods of doing a byte array pool: one used a simple queue system, and just added/removed them f...
When reading data in chunks of say, 1024, how do I continue to read from a socket that receives a message bigger than 1024 bytes until there is no data left? Should I just use BeginReceive to read a packet's length prefix only, and then once that is retrieved, use Receive() (in the async thread) to read the rest of the packet? Or is ther...
I recognize this type of question has a long history, but the way I am using this must be the correct '.net way' and yet it does not seem to work. I have a trivial synchronous IP server daemon that does a simple AcceptSocket, do some stuff, socket.send, socket.shutdown, socket.close. My client is another trivial C# app that does URLDo...
I'm fairly new to C++ sockets. Is there a book for beginners for C++ socket programming? for windows i really need help ive been through alot of tutorials dont get any of it and im using dev-C++ ...
Hi, I need to implement a process where users punch in a few details into a web page, and have this information fired as some sort of an event to a Java rich client application (SWING) on the same host. One idea was perhaps implementing an applet that would initiate socket communication with a listener implemented by the SWING applicat...
So I'm almost done an assignment involving Win32 programming and sockets, but I have to generate and analyze some statistics about the transfers. The only part I'm having trouble with is how to figure out the number of packets that were sent to the server from the client. The data sent can be variable-length, so I can't just divide the ...
This is kind of a branch off of my other question. Read it if you like, but it's not necessary. Basically, I realized that in order to effectively use C#'s BeginReceive() on large messages, I need to either (a) read the packet length first, then read exactly that many bytes or (b) use an end-of-packet delimiter. My question is, are eith...
I was reading about using the SO_LINGER socket option to intentionally 'assassinate' the time-wait state by setting the linger time to zero. The author of the book then goes on to say we should never do this and in general that we should never interfere with the time-wait state. He then immediately recommends using the SO_REUSEADDR opt...
I just looked into wikipedia's entry on out-of-band data and as far as I understand, OOB data is somehow flagged more important and treated as ordinary data, but transmitted in a seperate stream, which profoundly confuses me. The actual question would be (besides "Could someone explain what OOB data is?"): I'm writing a unix applicatio...
I am using TCP sockets to communicate data between a server and client program using a specific port number on the same computer (localhost). I need a software that can capture the data being sent/received through that socket? (or) What's the simplest way of sniffing packets from a specified port in Java? ...