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From 3824a600a51188c713e900115d6af129b54706df Mon Sep 17 00:00:00 2001
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From: Mark Andrews <marka@isc.org>
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Date: Wed, 6 Feb 2019 11:35:21 -0800
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Subject: [PATCH] denied axfr requests were not effective for writable DLZ
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zones
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(cherry picked from commit d9077cd0038e59726e1956de18b4b7872038a283)
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(cherry picked from commit 34348d9ee4db15307c6c42db294419b4df569f76)
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---
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bin/named/xfrout.c | 8 ++++----
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bin/tests/system/dlzexternal/driver.c | 18 +++++++++++++++---
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bin/tests/system/dlzexternal/tests.sh | 16 ++++++++++++----
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3 files changed, 31 insertions(+), 11 deletions(-)
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diff --git a/bin/named/xfrout.c b/bin/named/xfrout.c
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index c531e0acef..f6e57d889e 100644
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--- a/bin/named/xfrout.c
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+++ b/bin/named/xfrout.c
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@@ -803,12 +803,12 @@ ns_xfr_start(ns_client_t *client, dns_rdatatype_t reqtype) {
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result = dns_zt_find(client->view->zonetable, question_name, 0, NULL,
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&zone);
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- if (result != ISC_R_SUCCESS) {
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+ if (result != ISC_R_SUCCESS || dns_zone_gettype(zone) == dns_zone_dlz) {
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/*
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- * Normal zone table does not have a match.
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- * Try the DLZ database
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+ * The normal zone table does not have a match, or this is
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+ * marked in the zone table as a DLZ zone. Check the DLZ
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+ * databases for a match.
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*/
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- // Temporary: only searching the first DLZ database
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if (! ISC_LIST_EMPTY(client->view->dlz_searched)) {
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result = dns_dlzallowzonexfr(client->view,
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question_name,
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diff --git a/bin/tests/system/dlzexternal/driver.c b/bin/tests/system/dlzexternal/driver.c
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index 37a62622da..dfa7847984 100644
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--- a/bin/tests/system/dlzexternal/driver.c
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+++ b/bin/tests/system/dlzexternal/driver.c
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@@ -542,10 +542,22 @@ dlz_lookup(const char *zone, const char *name, void *dbdata,
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*/
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isc_result_t
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dlz_allowzonexfr(void *dbdata, const char *name, const char *client) {
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- UNUSED(client);
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+ isc_result_t result;
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+
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+ result = dlz_findzonedb(dbdata, name, NULL, NULL);
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+ if (result != ISC_R_SUCCESS) {
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+ return (result);
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+ }
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- /* Just say yes for all our zones */
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- return (dlz_findzonedb(dbdata, name, NULL, NULL));
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+ /*
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+ * Exception for 10.53.0.5 so we can test that allow-transfer
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+ * is effective.
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+ */
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+ if (strcmp(client, "10.53.0.5") == 0) {
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+ return (ISC_R_NOPERM);
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+ }
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+
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+ return (ISC_R_SUCCESS);
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}
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/*
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diff --git a/bin/tests/system/dlzexternal/tests.sh b/bin/tests/system/dlzexternal/tests.sh
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index 87dd13b10e..1754aaa57c 100644
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--- a/bin/tests/system/dlzexternal/tests.sh
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+++ b/bin/tests/system/dlzexternal/tests.sh
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@@ -108,15 +108,23 @@ test_update testdc1.alternate.nil. A "86400 A 10.53.0.10" "10.53.0.10" || ret=1
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status=`expr $status + $ret`
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newtest "testing AXFR from DLZ drivers"
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-$DIG $DIGOPTS +noall +answer axfr example.nil > dig.out.ns1.test$n
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-lines=`cat dig.out.ns1.test$n | wc -l`
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+$DIG $DIGOPTS +noall +answer axfr example.nil > dig.out.example.ns1.test$n
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+lines=`cat dig.out.example.ns1.test$n | wc -l`
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[ ${lines:-0} -eq 4 ] || ret=1
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-$DIG $DIGOPTS +noall +answer axfr alternate.nil > dig.out.ns1.test$n
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-lines=`cat dig.out.ns1.test$n | wc -l`
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+$DIG $DIGOPTS +noall +answer axfr alternate.nil > dig.out.alternate.ns1.test$n
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+lines=`cat dig.out.alternate.ns1.test$n | wc -l`
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[ ${lines:-0} -eq 5 ] || ret=1
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[ "$ret" -eq 0 ] || echo_i "failed"
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status=`expr $status + $ret`
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+newtest "testing AXFR denied from DLZ drivers"
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+$DIG $DIGOPTS -b 10.53.0.5 +noall +answer axfr example.nil > dig.out.example.ns1.test$n
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+grep "; Transfer failed" dig.out.example.ns1.test$n > /dev/null || ret=1
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+$DIG $DIGOPTS -b 10.53.0.5 +noall +answer axfr alternate.nil > dig.out.alternate.ns1.test$n
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+grep "; Transfer failed" dig.out.alternate.ns1.test$n > /dev/null || ret=1
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+[ "$ret" -eq 0 ] || echo_i "failed"
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+status=`expr $status + $ret`
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+
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newtest "testing unsearched/unregistered DLZ zone is not found"
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$DIG $DIGOPTS +noall +answer ns other.nil > dig.out.ns1.test$n
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grep "3600.IN.NS.other.nil." dig.out.ns1.test$n > /dev/null && ret=1
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--
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2.20.1
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