setupSocket -- no callback

gistfile1.m

- (void) setupSocket {
    struct sockaddr_in addr;
    
    bzero(&addr, sizeof(addr));
    addr.sin_len = sizeof(addr);
    addr.sin_family = AF_INET;
    // Ask kernel to randomly assign port
    addr.sin_port = 0;

    void* info = (__bridge void*) self;
    readsock = CFSocketCreate(kCFAllocatorDefault, PF_INET, SOCK_STREAM,
                              IPPROTO_TCP, kCFSocketReadCallBack |
                              kCFSocketAcceptCallBack | kCFSocketDataCallBack |
                              kCFSocketConnectCallBack | kCFSocketWriteCallBack,
                              (CFSocketCallBack)&readSockCallBack, info);
    
    CFRunLoopSourceRef sourceRef =
    CFSocketCreateRunLoopSource(kCFAllocatorDefault, readsock, 0);
    CFRunLoopAddSource(CFRunLoopGetCurrent(), sourceRef, kCFRunLoopCommonModes);

    int readsockfd = CFSocketGetNative(readsock);
    int err = bind(readsockfd, (struct sockaddr *) &addr, sizeof(addr));
    if (err != 0) {
        LOG_NETWORK(8, @"binding readsocket failed due to error %d: %d", err, errno);
        assert(0);
    }
    
    socklen_t addrLen = sizeof(addr);
    // Figure out which port the kernel gave us
    err = getsockname(readsockfd, (struct sockaddr *) &addr, &addrLen);
    if (err != 0) {
        LOG_NETWORK(8, @"Getting socket info failed! %d: %d", err, errno);
    }
    
    _port = ntohs(addr.sin_port);
    
    // Backlog of 15
    err = listen(readsockfd, 15);
    if (err != 0) {
        LOG_NETWORK(8, @"Listening on socket failed! %d: %d", err, errno);
    }
}