struct PFwdPrivate *pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
void pfd_send(Socket s, char *data, int len){    struct PFwdPrivate *pr = (struct PFwdPrivate *) sk_get_private_ptr(s);    if (s == NULL)	return;    sk_write(s, data, len);}