vendor/unbound/1.5.10

4 files changed, 67 insertions, 13 deletions

diff --git a/iterator/iter_hints.c b/iterator/iter_hints.c
index 217dfa2578ba..5fd90177aff0 100644
--- a/iterator/iter_hints.c
+++ b/iterator/iter_hints.c
@@ -147,6 +147,7 @@ compile_time_root_prime(int do_ip4, int do_ip6)
 	if(!ah(dp, "B.ROOT-SERVERS.NET.", "2001:500:84::b")) goto failed;
 	if(!ah(dp, "C.ROOT-SERVERS.NET.", "2001:500:2::c")) goto failed;
 	if(!ah(dp, "D.ROOT-SERVERS.NET.", "2001:500:2d::d")) goto failed;
+	if(!ah(dp, "E.ROOT-SERVERS.NET.", "2001:500:a8::e")) goto failed;
 	if(!ah(dp, "F.ROOT-SERVERS.NET.", "2001:500:2f::f")) goto failed;
 	if(!ah(dp, "H.ROOT-SERVERS.NET.", "2001:500:1::53")) goto failed;
 	if(!ah(dp, "I.ROOT-SERVERS.NET.", "2001:7fe::53")) goto failed;
diff --git a/iterator/iter_utils.c b/iterator/iter_utils.c
index a5aefa9602c2..874dd6850e4e 100644
--- a/iterator/iter_utils.c
+++ b/iterator/iter_utils.c
@@ -360,6 +360,39 @@ iter_filter_order(struct iter_env* iter_env, struct module_env* env,
 		}
 	}
 	*selected_rtt = low_rtt;
+
+	if (env->cfg->prefer_ip6) {
+		int got_num6 = 0;
+		int low_rtt6 = 0;
+		int i;
+		prev = NULL;
+		a = dp->result_list;
+		for(i = 0; i < got_num; i++) {
+			swap_to_front = 0;
+			if(a->addr.ss_family == AF_INET6) {
+				got_num6++;
+				swap_to_front = 1;
+				if(low_rtt6 == 0 || a->sel_rtt < low_rtt6) {
+					low_rtt6 = a->sel_rtt;
+				}
+			}
+			/* swap to front if IPv6, or move to next result */
+			if(swap_to_front && prev) {
+				n = a->next_result;
+				prev->next_result = n;
+				a->next_result = dp->result_list;
+				dp->result_list = a;
+				a = n;
+			} else {
+				prev = a;
+				a = a->next_result;
+			}
+		}
+		if(got_num6 > 0) {
+			got_num = got_num6;
+			*selected_rtt = low_rtt6;
+		}
+	}
 	return got_num;
 }
 
diff --git a/iterator/iterator.c b/iterator/iterator.c
index 139cae4bae0a..cc7e9378c9e7 100644
--- a/iterator/iterator.c
+++ b/iterator/iterator.c
@@ -148,6 +148,7 @@ iter_new(struct module_qstate* qstate, int id)
 	iq->qchase = qstate->qinfo;
 	outbound_list_init(&iq->outlist);
 	iq->minimise_count = 0;
+	iq->minimise_timeout_count = 0;
 	if (qstate->env->cfg->qname_minimisation)
 		iq->minimisation_state = INIT_MINIMISE_STATE;
 	else
@@ -215,6 +216,7 @@ error_supers(struct module_qstate* qstate, int id, struct module_qstate* super)
 		qstate->qinfo.qtype == LDNS_RR_TYPE_AAAA) {
 		/* mark address as failed. */
 		struct delegpt_ns* dpns = NULL;
+		super_iq->num_target_queries--; 
 		if(super_iq->dp)
 			dpns = delegpt_find_ns(super_iq->dp, 
 				qstate->qinfo.qname, qstate->qinfo.qname_len);
@@ -234,7 +236,6 @@ error_supers(struct module_qstate* qstate, int id, struct module_qstate* super)
 				log_err("out of memory adding missing");
 		}
 		dpns->resolved = 1; /* mark as failed */
-		super_iq->num_target_queries--; 
 	}
 	if(qstate->qinfo.qtype == LDNS_RR_TYPE_NS) {
 		/* prime failed to get delegation */
@@ -2008,7 +2009,7 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 				iq->dp->name))) {
 			iq->qinfo_out.qname = iq->dp->name;
 			iq->qinfo_out.qname_len = iq->dp->namelen;
-			iq->qinfo_out.qtype = LDNS_RR_TYPE_NS;
+			iq->qinfo_out.qtype = LDNS_RR_TYPE_A;
 			iq->qinfo_out.qclass = iq->qchase.qclass;
 			iq->minimise_count = 0;
 		}
@@ -2023,6 +2024,9 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 		iq->qinfo_out.qname = iq->qchase.qname;
 		iq->qinfo_out.qname_len = iq->qchase.qname_len;
 		iq->minimise_count++;
+		iq->minimise_timeout_count = 0;
+
+		iter_dec_attempts(iq->dp, 1);
 
 		/* Limit number of iterations for QNAMEs with more
 		 * than MAX_MINIMISE_COUNT labels. Send first MINIMISE_ONE_LAB
@@ -2059,8 +2063,9 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 				&iq->qinfo_out.qname_len, 
 				labdiff-1);
 		}
-		if(labdiff < 1 || 
-			(labdiff < 2 && iq->qchase.qtype == LDNS_RR_TYPE_DS))
+		if(labdiff < 1 || (labdiff < 2 
+			&& (iq->qchase.qtype == LDNS_RR_TYPE_DS
+			|| iq->qchase.qtype == LDNS_RR_TYPE_A)))
 			/* Stop minimising this query, resolve "as usual" */
 			iq->minimisation_state = DONOT_MINIMISE_STATE;
 		else {
@@ -2077,10 +2082,17 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 				return 1;
 		}
 	}
-	if(iq->minimisation_state == SKIP_MINIMISE_STATE)
-		/* Do not increment qname, continue incrementing next 
-		 * iteration */
-		iq->minimisation_state = MINIMISE_STATE;
+	if(iq->minimisation_state == SKIP_MINIMISE_STATE) {
+		iq->minimise_timeout_count++;
+		if(iq->minimise_timeout_count < MAX_MINIMISE_TIMEOUT_COUNT)
+			/* Do not increment qname, continue incrementing next 
+			 * iteration */
+			iq->minimisation_state = MINIMISE_STATE;
+		else
+			/* Too many time-outs detected for this QNAME and QTYPE.
+			 * We give up, disable QNAME minimisation. */
+			iq->minimisation_state = DONOT_MINIMISE_STATE;
+	}
 	if(iq->minimisation_state == DONOT_MINIMISE_STATE)
 		iq->qinfo_out = iq->qchase;
 
@@ -2158,7 +2170,7 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 	iq->num_current_queries--;
 	if(iq->response == NULL) {
 		/* Don't increment qname when QNAME minimisation is enabled */
-		if (qstate->env->cfg->qname_minimisation)
+		if(qstate->env->cfg->qname_minimisation)
 			iq->minimisation_state = SKIP_MINIMISE_STATE;
 		iq->chase_to_rd = 0;
 		iq->dnssec_lame_query = 0;
@@ -2649,6 +2661,10 @@ processTargetResponse(struct module_qstate* qstate, int id,
 	log_query_info(VERB_ALGO, "processTargetResponse", &qstate->qinfo);
 	log_query_info(VERB_ALGO, "processTargetResponse super", &forq->qinfo);
 
+	/* Tell the originating event that this target query has finished
+	 * (regardless if it succeeded or not). */
+	foriq->num_target_queries--;
+
 	/* check to see if parent event is still interested (in orig name).  */
 	if(!foriq->dp) {
 		verbose(VERB_ALGO, "subq: parent not interested, was reset");
@@ -2664,10 +2680,6 @@ processTargetResponse(struct module_qstate* qstate, int id,
 		return;
 	}
 
-	/* Tell the originating event that this target query has finished
-	 * (regardless if it succeeded or not). */
-	foriq->num_target_queries--;
-
 	/* if iq->query_for_pside_glue then add the pside_glue (marked lame) */
 	if(iq->pside_glue) {
 		/* if the pside_glue is NULL, then it could not be found,
diff --git a/iterator/iterator.h b/iterator/iterator.h
index 7c32a74f800b..5585f578958d 100644
--- a/iterator/iterator.h
+++ b/iterator/iterator.h
@@ -69,6 +69,9 @@ struct rbtree_t;
  * QNAMEs with a lot of labels.
 */
 #define MAX_MINIMISE_COUNT	10
+/* max number of time-outs for minimised query. Prevents resolving failures
+ * when the QNAME minimisation QTYPE is blocked. */
+#define MAX_MINIMISE_TIMEOUT_COUNT 3
 /**
  * number of labels from QNAME that are always send individually when using
  * QNAME minimisation, even when the number of labels of the QNAME is bigger
@@ -377,6 +380,11 @@ struct iter_qstate {
 	 * outgoing queries when QNAME minimisation is enabled.
 	 */
 	int minimise_count;
+
+	/**
+	 * Count number of time-outs. Used to prevent resolving failures when
+	 * the QNAME minimisation QTYPE is blocked. */
+	int minimise_timeout_count;
 };
 
 /**