unbound/iterator/iterator.c

594 	struct iter_hints_stub* stub;
596 	/* do not process a last resort (the parent side) if a stub
599 	if(!dname_is_root(nm) && (stub = (struct iter_hints_stub*)
603 		stub->dp->has_parent_side_NS) {
604 		if(retdp) *retdp = stub->dp;
824  * Generate and process a stub priming request. This method tests for the
825  * need to prime a stub zone, so it is safe to call for every request.
833  *         issue a priming request if it detects an unprimed stub.
834  *         Uses value of 2 to signal during stub-prime in root-prime situation
835  *         that a noprime-stub is available and resolution can continue.
841 	/* Lookup the stub hint. This will return null if the stub doesn't
843 	struct iter_hints_stub* stub;
848 	stub = hints_lookup_stub(qstate->env->hints, qname, qclass, iq->dp);
849 	/* The stub (if there is one) does not need priming. */
850 	if(!stub)
852 	stub_dp = stub->dp;
853 	/* if we have an auth_zone dp, and stub is equal, don't prime stub
859 	/* is it a noprime stub (always use) */
860 	if(stub->noprime) {
867 			log_err("out of memory priming stub");
868 			errinf(qstate, "malloc failure, priming stub");
872 		log_nametypeclass(VERB_DETAIL, "use stub", stub_dp->name,
877 	/* Otherwise, we need to (re)prime the stub. */
878 	log_nametypeclass(VERB_DETAIL, "priming stub", stub_dp->name,
886 		verbose(VERB_ALGO, "could not prime stub");
887 		errinf(qstate, "could not generate lookup for stub prime");
896 		/* make copy to avoid use of stub dp by different qs/threads */
899 			log_err("out of memory priming stub, copydp");
903 			errinf(qstate, "malloc failure, in stub prime");
908 		 * wouldn't be anyway, since stub hints never have
1112 		/* make copy to avoid use of stub dp by different qs/threads */
1170 		/* make copy to avoid use of stub dp by different qs/threads */
1270 	 * If we are restricted by a forward-zone or a stub-zone, we
1438 			/* if there is a stub, then no root prime needed */
1442 				break; /* got noprime-stub-zone, continue */
1444 				return 0; /* stub prime request made */
1529 					verbose(VERB_QUERY, "cache has stub "
1536 							"stub/fwd fallback");
1599  * This part is primarily handling stub zone priming. Events that reach this
1620 		struct iter_hints_stub* stub;
1626 		/* Do not send queries above stub, do not set delname to dp if
1627 		 * this is above stub without stub-first. */
1628 		stub = hints_lookup_stub(
1631 		if(!stub || !stub->dp->has_parent_side_NS ||
1632 			dname_subdomain_c(iq->dp->name, stub->dp->name)) {
1648 	/* Check to see if we need to prime a stub zone. */
1660  * as a separate state so that queries that generate stub priming events
1661  * will get the tail end of the init process but not repeat the stub priming
1922 		errinf(qstate, "all the configured stub or forward servers failed,");
1924 		verbose(VERB_QUERY, "configured stub or forward servers failed -- returning SERVFAIL");
2014 		 * delegation point is a stub and we cannot go higher, skip*/
2020 				"because it is also a stub/forward,",
3151 	/* root priming responses go to init stage 2, priming stub
3162  * root and stub priming responses. This is basically the equivalent of the
3191 	/* validate the root or stub after priming (if enabled).