[Thilo Ettelt]

Hi, i'm trying to make a small server application using SmallSockets. But I have a few questions. To start off: do I have to create multiple (listening) sockets meaning when one (listening) socket is occupied, create a new one or does that somehow work automatically? And if it works automatically how do I get the data?

I hope anyone can help me,

cheers, Thilo

[int69h]

I haven't looked at SmallSockets in awhile, but I do remember it being a very thin wrapper around BSD sockets.

You only need one listening socket. When your listening socket accepts a connection it creates a new socket that represents your endpoint of the communication.

[int69h]

I think he packaged a little client/server example with the distribution. You might want to take a look at it.

[int69h]

I downloaded SmallSockets today and saw that he only provided an example of writing a client, so I whipped up a small example. I'll post the most relevant parts. It's not very well designed as far as resource usage, but I wanted to keep the code as simple to follow as possible. This design handles one client connection at a time. If another client connects, it waits in a queue. If you would like the full project, just let me know and I'll post it somewhere.

From server_main.m:

Code:
    // Initialize the network connection
    listener = [BufferedSocket bufferedSocket];[listener listenOnPort:ECHO_PORT];
    NSLog(@"Listening for connections on port %d.", ECHO_PORT);
    // Sit in an infinite loop.
    while(YES) {
        incoming =[listener acceptConnectionAndKeepListening];
        NSLog(@"Client connection established");
        server = [[[EchoServer alloc] initWithSocket:incoming] autorelease];
        // If we wanted to serve multiple clients, we could spawn off a thread here.
        // We could also register with inetd and use a process per connection.
        [server serviceClient];
        NSLog(@"Client connection terminated");
    }

From EchoServer.m:

Code:
-(void) serviceClient
{
    NSData *data;
    NSString *line;
    
    while([_socket isConnected]) {
        //Read a line of input
        data = [_socket readDataUpToString:@"\n"];
        line = [[NSString alloc] initWithData:data
                                     encoding:NSUTF8StringEncoding];
        // Echo input to client
        [_socket writeString:line];
        [line release];
    }
}

[int69h]

Just made a multi-threaded version if anyone is interested.