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From 9be04e6fac3f4ee8fa08d3671dac41d2156d2ced Mon Sep 17 00:00:00 2001
From: Wouter Wijngaards <wouter@nlnetlabs.nl>
Date: Thu, 27 Sep 2018 08:19:29 +0000
Subject: [PATCH] - Fix #4188: IPv6 forwarders without ipv6 result in SERVFAIL,
 fixes   qname minimisation with a forwarder when connectivity has issues  
 from rejecting responses.

git-svn-id: file:///svn/unbound/trunk@4916 be551aaa-1e26-0410-a405-d3ace91eadb9
---
 iterator/iterator.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/iterator/iterator.c b/iterator/iterator.c
index 7baf92b7..2f26bd33 100644
--- a/iterator/iterator.c
+++ b/iterator/iterator.c
@@ -2174,7 +2174,8 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 		return 0;
 	}
 
-	if(iq->minimisation_state == INIT_MINIMISE_STATE) {
+	if(iq->minimisation_state == INIT_MINIMISE_STATE
+		&& !(iq->chase_flags & BIT_RD)) {
 		/* (Re)set qinfo_out to (new) delegation point, except when
 		 * qinfo_out is already a subdomain of dp. This happens when
 		 * increasing by more than one label at once (QNAMEs with more
@@ -2715,7 +2716,8 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 			sock_list_insert(&qstate->reply_origin, 
 				&qstate->reply->addr, qstate->reply->addrlen, 
 				qstate->region);
-		if(iq->minimisation_state != DONOT_MINIMISE_STATE) {
+		if(iq->minimisation_state != DONOT_MINIMISE_STATE
+			&& !(iq->chase_flags & BIT_RD)) {
 			if(FLAGS_GET_RCODE(iq->response->rep->flags) != 
 				LDNS_RCODE_NOERROR) {
 				if(qstate->env->cfg->qname_minimisation_strict)
-- 
2.14.4