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3704cf42eb
Previously, when answering from the cache, and when minimal-responses was not set, we added the best known zone cut to the authority section of the response message, using dns_db_findzonecut() to look it up in the DNS cache. Since the DNS cache will no longer be used to store parent-side NS RRsets, it will now be possible for an ancestor node to be used as the zone cut, leading to the wrong NS record being included. There are various ways we could correct this: 1. Use dns_deleg_lookup() instead of dns_db_findzonecut() to find the zone cut. But currently, the deleg database stores only the server addresses for the delegation, not the full NS RRset; this would need to be changed. 2. Look up <name>/NS whenever we cache a referral; that way we'll get the child-side NS RRset and cache that, and we can retrieve it when building the response. But the solution chosen here is simply not to look up the NS record when answering from the cache, effectively making "minimal-responses yes;" mandatory for queries answered from the cache. System tests have been updated as needed, so they no longer expect NS RRsets in the authority section of recursive responses.
212 lines
7.7 KiB
Bash
Executable file
212 lines
7.7 KiB
Bash
Executable file
#!/bin/sh
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# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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#
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# SPDX-License-Identifier: MPL-2.0
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, you can obtain one at https://mozilla.org/MPL/2.0/.
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#
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# See the COPYRIGHT file distributed with this work for additional
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# information regarding copyright ownership.
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set -e
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. ../conf.sh
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DIGOPTS="-p ${PORT}"
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RNDCCMD="$RNDC -c ../_common/rndc.conf -p ${CONTROLPORT} -s"
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status=0
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n=0
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for conf in conf/good*.conf; do
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n=$((n + 1))
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echo_i "checking that $conf is accepted ($n)"
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ret=0
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$CHECKCONF "$conf" || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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done
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for conf in conf/bad*.conf; do
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n=$((n + 1))
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echo_i "checking that $conf is rejected ($n)"
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ret=0
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$CHECKCONF "$conf" >/dev/null && ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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done
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n=$((n + 1))
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echo_i "trying an axfr that should be denied (NOTAUTH) ($n)"
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ret=0
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$DIG $DIGOPTS +tcp data.example. @10.53.0.2 axfr >dig.out.ns2.test$n || ret=1
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grep "; Transfer failed." dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "non recursive query for a static-stub zone with server address should be rejected ($n)"
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ret=0
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$DIG $DIGOPTS +tcp +norec data.example. @10.53.0.2 txt >dig.out.ns2.test$n \
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|| ret=1
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grep "REFUSED" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "non recursive query for a static-stub zone with server name should be rejected ($n)"
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ret=0
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$DIG $DIGOPTS +tcp +norec data.example.org. @10.53.0.2 txt >dig.out.ns2.test$n \
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|| ret=1
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grep "REFUSED" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "allow-query ACL ($n)"
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ret=0
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$DIG $DIGOPTS +tcp +norec data.example. @10.53.0.2 txt -b 10.53.0.7 \
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>dig.out.ns2.test$n || ret=1
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grep "REFUSED" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "look for static-stub zone data with recursion (should be found) ($n)"
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ret=0
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$DIG $DIGOPTS +tcp +noauth data.example. @10.53.0.2 txt >dig.out.ns2.test$n || ret=1
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digcomp knowngood.dig.out.rec dig.out.ns2.test$n || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "checking authoritative NS is ignored for delegation ($n)"
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ret=0
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# the auth server returns a different (and incorrect) NS for .example.
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$DIG $DIGOPTS +tcp example. @10.53.0.2 ns >dig.out.ns2.test1.$n || ret=1
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grep "ns4.example." dig.out.ns2.test1.$n >/dev/null || ret=1
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# but static-stub configuration should still be used
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$DIG $DIGOPTS +tcp data2.example. @10.53.0.2 txt >dig.out.ns2.test2.$n || ret=1
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grep "2nd test data" dig.out.ns2.test2.$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "checking queries for a child zone of the static-stub zone ($n)"
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ret=0
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# prime the delegation to a child zone of the static-stub zone
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$DIG $DIGOPTS +tcp data1.sub.example. @10.53.0.2 txt >dig.out.ns2.test1.$n || ret=1
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grep "1st sub test data" dig.out.ns2.test1.$n >/dev/null || ret=1
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# temporarily disable the the parent zone
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cp ns3/named2.conf ns3/named.conf
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rndc_reload ns3 10.53.0.3
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# query the child zone again. this should directly go to the child and
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# succeed.
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for i in 0 1 2 3 4 5 6 7 8 9; do
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$DIG $DIGOPTS +tcp data2.sub.example. @10.53.0.2 txt >dig.out.ns2.test2.$n || ret=1
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grep "2nd sub test data" dig.out.ns2.test2.$n >/dev/null && break
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sleep 1
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done
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grep "2nd sub test data" dig.out.ns2.test2.$n >/dev/null || ret=1
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# re-enable the parent
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cp ns3/named1.conf ns3/named.conf
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rndc_reload ns3 10.53.0.3
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "checking authoritative NS addresses are ignored for delegation ($n)"
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ret=0
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# the auth server returns a different (and incorrect) A/AAA RR for .example.
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$DIG $DIGOPTS +tcp example. @10.53.0.2 a >dig.out.ns2.test1.$n || ret=1
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grep "10.53.0.4" dig.out.ns2.test1.$n >/dev/null || ret=1
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$DIG $DIGOPTS +tcp example. @10.53.0.2 aaaa >dig.out.ns2.test2.$n || ret=1
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grep "::1" dig.out.ns2.test2.$n >/dev/null || ret=1
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# reload the server. this will flush the ADB.
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rndc_reload ns2 10.53.0.2
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# ask another RR that would require delegation. static-stub configuration
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# should still be used instead of the authoritative A/AAAA cached above.
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$DIG $DIGOPTS +tcp data3.example. @10.53.0.2 txt >dig.out.ns2.test3.$n || ret=1
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grep "3rd test data" dig.out.ns2.test3.$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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# the authoritative server of the query domain (example.com) is the apex
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# name of the static-stub zone (example). in this case the static-stub
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# configuration must be ignored and cached information must be used.
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n=$((n + 1))
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echo_i "checking NS of static-stub is ignored when referenced from other domain ($n)"
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ret=0
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$DIG $DIGOPTS +tcp data.example.com. @10.53.0.2 txt >dig.out.ns2.test$n || ret=1
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grep "example com data" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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# check server-names
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n=$((n + 1))
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echo_i "checking static-stub with a server-name ($n)"
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ret=0
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$DIG $DIGOPTS +tcp data.example.org. @10.53.0.2 txt >dig.out.ns2.test$n || ret=1
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grep "example org data" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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# Note: for a short term workaround we use ::1, assuming it's configured and
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# usable for our tests. We should eventually use the test ULA and available
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# checks introduced in change 2916.
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if testsock6 ::1; then
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echo_i "checking IPv6 static-stub address ($n)"
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ret=0
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$DIG $DIGOPTS +tcp data.example.info. @10.53.0.2 txt >dig.out.ns2.test$n || ret=1
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grep "example info data" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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else
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echo_i "SKIPPED: checking IPv6 static-stub address ($n)"
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fi
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n=$((n + 1))
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echo_i "look for static-stub zone data with DNSSEC validation ($n)"
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ret=0
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$DIG $DIGOPTS +tcp +dnssec data4.example. @10.53.0.2 txt >dig.out.ns2.test$n || ret=1
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grep "ad; QUERY" dig.out.ns2.test$n >/dev/null || ret=1
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grep "4th test data" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "look for a child of static-stub zone data with DNSSEC validation ($n)"
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ret=0
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$DIG $DIGOPTS +tcp +dnssec data3.sub.example. @10.53.0.2 txt >dig.out.ns2.test$n || ret=1
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grep "ad; QUERY" dig.out.ns2.test$n >/dev/null || ret=1
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grep "3rd sub test data" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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# reload with a different name server: existing zone shouldn't be reused.
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n=$((n + 1))
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echo_i "checking server reload with a different static-stub config ($n)"
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ret=0
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cp ns2/named2.conf ns2/named.conf
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rndc_reload ns2 10.53.0.2
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$DIG $DIGOPTS +tcp data2.example.org. @10.53.0.2 txt >dig.out.ns2.test$n || ret=1
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grep "2nd example org data" dig.out.ns2.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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n=$((n + 1))
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echo_i "checking static-stub of a undelegated tld resolves after DS query ($n)"
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ret=0
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$DIG $DIGOPTS undelegated. @10.53.0.2 ds >dig.out.ns2.ds.test$n || ret=1
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$DIG $DIGOPTS undelegated. @10.53.0.2 soa >dig.out.ns2.soa.test$n || ret=1
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grep "status: NXDOMAIN" dig.out.ns2.ds.test$n >/dev/null || ret=1
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grep "status: NOERROR" dig.out.ns2.soa.test$n >/dev/null || ret=1
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if [ $ret != 0 ]; then echo_i "failed"; fi
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status=$((status + ret))
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echo_i "exit status: $status"
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[ $status -eq 0 ] || exit 1
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