int TcpSocket::GetFreePort(){
	
	socklen_t addrLen;
	int s  = ::socket(AF_INET, SOCK_STREAM, 0);

    if (s == -1) {
        LOG("Failed to create socket");
    }
	
	sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = 0;
	
	//  INADDR_ANY as the default parameter?
	//sin.sin_addr.s_addr = htonl(INADDR_ANY);
	sin.sin_addr.s_addr = inet_addr("127.0.0.1");
	
	if (bind(s, (const sockaddr *)&sin, sizeof(sin)) == -1) {
        LOG("Failed to bind");
    }
    addrLen = sizeof(sin);
    if (getsockname(s, (struct sockaddr *)&sin, &addrLen) == -1) {
        LOG("getsockname() failed");
    }
    LOG("port : " << sin.sin_port);

	return sin.sin_port;
}