	} else if(type == RESPONSE_TYPE_REFERRAL) {
		struct delegpt* old_dp = NULL;
		/* REFERRAL type responses get a reset of the
		 * delegation point, and back to the QUERYTARGETS_STATE. */
		verbose(VERB_DETAIL, "query response was REFERRAL");
…
			/* Store the referral under the current query */
			/* no prefetch-leeway, since its not the answer */
			iter_dns_store(qstate->env, &iq->response->qinfo,
				iq->response->rep, 1, 0, 0, NULL, 0,
				qstate->qstarttime, qstate->is_valrec);
…
		/* Reset the event state, setting the current delegation
		 * point to the referral. */
		iq->deleg_msg = iq->response;
		iq->dp = delegpt_from_message(iq->response, qstate->region,
			deleg_port_number(qstate->env));
…
		/* Count this as a referral. */
		iq->referral_count++;
		iq->sent_count = 0;
…
		return next_state(iq, QUERYTARGETS_STATE);
	} else if(type == RESPONSE_TYPE_CNAME) {
		uint8_t* sname = NULL;
		size_t snamelen = 0;
		/* CNAME type responses get a query restart (i.e., get a
		 * reset of the query state and go back to INIT_REQUEST_STATE).
		 */
		verbose(VERB_DETAIL, "query response was CNAME");
…
		/* set the current request's qname to the new value. */
		iq->qchase.qname = sname;
		iq->qchase.qname_len = snamelen;
…
		iq->query_restart_count++;
…
		/* go to INIT_REQUEST_STATE for new qname. */
		return next_state(iq, INIT_REQUEST_STATE);

Warm-up