I have an ipod touch program that should receive messages from a server program on my mac. To make sure that the touch can receive messages from a computer other than a mac, I programmed the server in C++. If I run both the server and the ipod app on the same computer (the app running on the simulator), the connection is fine and everything is dandy. However, when I try to connect to the server from my device, the connection times out. Can anyone spot the problem? I m not too good with networking, and the iPhone OS in general.

server.cpp:

sockfd = socket(PF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
    cout << "ERROR opening socket";
    return;
}

memset((char *)&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);

if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
    cout << "ERROR on binding";
    return;
}

listen(sockfd,5);
clilen = sizeof(cli_addr);

newsockfd = accept(sockfd,(struct sockaddr *) &cli_addr, (socklen_t*)&clilen);
if (newsockfd < 0) {
    cout << "ERROR on accept.";
    return;
}

The server gets stuck at the accept(), waiting for the app...

client.m:

CFReadStreamRef readStream = NULL;
CFWriteStreamRef writeStream = NULL;
CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, (CFStringRef)hostName, portNum, &readStream, &writeStream);

if (readStream && writeStream) {
    NSLog(@"Starting streams");

    CFReadStreamSetProperty(readStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);
    CFWriteStreamSetProperty(writeStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);

    inputStream = (NSInputStream *)readStream;
    [inputStream retain];
    [inputStream setDelegate:self];
    [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [inputStream open];

    outputStream = (NSOutputStream *)writeStream;
    [outputStream retain];
    [outputStream setDelegate:self];
    [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [outputStream open];
}
if (readStream)
    CFRelease(readStream);

if (writeStream)
    CFRelease(writeStream);

As far as I can tell, neither server nor client reports any errors (I m checking through errno and NSError) other than timing out.

If anyone can help me with this, much thanks!