public virtual void setup()
{
if (top_prot == null)
{
top_prot = conf.setupProtocolStack(setup_string, this);
if (top_prot == null)
{
throw new System.Exception("ProtocolStack.setup(): couldn't create protocol stack");
}
top_prot.UpProtocol = this;
bottom_prot = conf.getBottommostProtocol(top_prot);
conf.startProtocolStack(bottom_prot); // sets up queues and threads
}
}