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Queue "rndc signing -nsec3param ..." requests if needed

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If "rndc signing -nsec3param ..." is ran for a zone which has not yet
been loaded or transferred (i.e. its "db" field is NULL), it will be
silently ignored by named despite rndc logging an "nsec3param request
queued" message, which is misleading.  Prevent this by keeping a
per-zone queue of NSEC3PARAM change requests which arrive before a zone
is loaded or transferred and processing that queue once the raw version
of an inline-signed zone becomes available.
This commit is contained in:
Michał Kępień 2018-08-14 09:22:43 +02:00
parent f34e7ee612
commit cb40c5229a
3 changed files with 79 additions and 18 deletions
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1
bin/tests/system/inline/ns2/named.conf.in
View file

@ -48,6 +48,7 @@ zone "retransfer3" {
type master;
file "retransfer3.db";
allow-update { any; };
allow-transfer { none; }; // changed dynamically by tests.sh
notify no;
};

52
bin/tests/system/inline/tests.sh
View file

@ -27,22 +27,6 @@ do
sleep 1
done
# Loop until retransfer3 has been transferred.
for i in 1 2 3 4 5 6 7 8 9 0
do
ans=0
$RNDCCMD 10.53.0.3 signing -nsec3param 1 0 0 - retransfer3 > /dev/null 2>&1 || ans=1
[ $ans = 0 ] && break
sleep 1
done
for i in 1 2 3 4 5 6 7 8 9 0
do
nsec3param=`$DIG $DIGOPTS +nodnssec +short @10.53.0.3 nsec3param retransfer3.`
test "$nsec3param" = "1 0 0 -" && break
sleep 1
done
n=`expr $n + 1`
echo_i "checking that rrsigs are replaced with ksk only ($n)"
ret=0
@ -770,9 +754,45 @@ done
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo_i "check 'rndc signing -nsec3param' requests are queued for zones which are not loaded ($n)"
ret=0
# The "retransfer3" zone is configured with "allow-transfer { none; };" on ns2,
# which means it should not yet be available on ns3.
$DIG $DIGOPTS @10.53.0.3 retransfer3 SOA > dig.out.ns3.pre.test$n
grep "status: SERVFAIL" dig.out.ns3.pre.test$n > /dev/null || ret=1
# Switch the zone to NSEC3. An "NSEC3 -> NSEC -> NSEC3" sequence is used purely
# to test that multiple queued "rndc signing -nsec3param" requests are handled
# properly.
$RNDCCMD 10.53.0.3 signing -nsec3param 1 0 0 - retransfer3 > /dev/null 2>&1 || ret=1
$RNDCCMD 10.53.0.3 signing -nsec3param none retransfer3 > /dev/null 2>&1 || ret=1
$RNDCCMD 10.53.0.3 signing -nsec3param 1 0 0 - retransfer3 > /dev/null 2>&1 || ret=1
# Reconfigure ns2 to allow outgoing transfers for the "retransfer3" zone.
sed "s|\(allow-transfer { none; };.*\)|// \1|;" ns2/named.conf > ns2/named.conf.new
mv ns2/named.conf.new ns2/named.conf
$RNDCCMD 10.53.0.2 reconfig || ret=1
# Request ns3 to retransfer the "retransfer3" zone.
$RNDCCMD 10.53.0.3 retransfer retransfer3 || ret=1
# Wait until ns3 finishes building the NSEC3 chain for "retransfer3". There is
# no need to immediately set ret=1 if the expected message does not appear in
# the log within the time limit because the query we will send shortly will
# detect problems anyway.
for i in 0 1 2 3 4 5 6 7 8 9
do
grep "add.*retransfer3.*NSEC3PARAM 1 0 0 -" ns3/named.run > /dev/null && break
sleep 1
done
# Check whether "retransfer3" uses NSEC3 as requested.
$DIG $DIGOPTS @10.53.0.3 nonexist.retransfer3 A > dig.out.ns3.post.test$n
grep "status: NXDOMAIN" dig.out.ns3.post.test$n > /dev/null || ret=1
grep "NSEC3" dig.out.ns3.post.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo_i "check rndc retransfer of a inline nsec3 slave retains nsec3 ($n)"
ret=0
$RNDCCMD 10.53.0.3 signing -nsec3param 1 0 0 - retransfer3 > /dev/null 2>&1 || ret=1
for i in 0 1 2 3 4 5 6 7 8 9
do
ans=0

44
lib/dns/zone.c
View file

@ -357,6 +357,10 @@ struct dns_zone {
*/
dns_signinglist_t signing;
dns_nsec3chainlist_t nsec3chain;
/*%
* List of outstanding NSEC3PARAM change requests.
*/
isc_eventlist_t setnsec3param_queue;
/*%
* Signing / re-signing quantum stopping parameters.
*/
@ -1039,6 +1043,7 @@ dns_zone_create(dns_zone_t **zonep, isc_mem_t *mctx) {
zone->isselfarg = NULL;
ISC_LIST_INIT(zone->signing);
ISC_LIST_INIT(zone->nsec3chain);
ISC_LIST_INIT(zone->setnsec3param_queue);
zone->signatures = 10;
zone->nodes = 100;
zone->privatetype = (dns_rdatatype_t)0xffffU;
@ -1116,6 +1121,7 @@ zone_free(dns_zone_t *zone) {
isc_mem_t *mctx = NULL;
dns_signing_t *signing;
dns_nsec3chain_t *nsec3chain;
isc_event_t *setnsec3param_event;
dns_include_t *include;
REQUIRE(DNS_ZONE_VALID(zone));
@ -1149,6 +1155,12 @@ zone_free(dns_zone_t *zone) {
}
/* Unmanaged objects */
while (!ISC_LIST_EMPTY(zone->setnsec3param_queue)) {
setnsec3param_event = ISC_LIST_HEAD(zone->setnsec3param_queue);
ISC_LIST_UNLINK(zone->setnsec3param_queue, setnsec3param_event,
ev_link);
isc_event_free(&setnsec3param_event);
}
for (signing = ISC_LIST_HEAD(zone->signing);
signing != NULL;
signing = ISC_LIST_HEAD(zone->signing)) {
@ -14750,6 +14762,8 @@ receive_secure_db(isc_task_t *task, isc_event_t *event) {
unsigned int oldserial = 0;
bool have_oldserial = false;
nsec3paramlist_t nsec3list;
isc_event_t *setnsec3param_event;
dns_zone_t *dummy;
UNUSED(task);
@ -14874,6 +14888,18 @@ receive_secure_db(isc_task_t *task, isc_event_t *event) {
zone_needdump(zone, 0); /* XXXMPA */
UNLOCK_ZONE(zone->raw);
/*
* Process any queued NSEC3PARAM change requests.
*/
while (!ISC_LIST_EMPTY(zone->setnsec3param_queue)) {
setnsec3param_event = ISC_LIST_HEAD(zone->setnsec3param_queue);
ISC_LIST_UNLINK(zone->setnsec3param_queue, setnsec3param_event,
ev_link);
dummy = NULL;
zone_iattach(zone, &dummy);
isc_task_send(zone->task, &setnsec3param_event);
}
failure:
UNLOCK_ZONE(zone);
if (result != ISC_R_SUCCESS)
@ -19093,8 +19119,22 @@ dns_zone_setnsec3param(dns_zone_t *zone, uint8_t hash, uint8_t flags,
np->nsec = false;
}
zone_iattach(zone, &dummy);
isc_task_send(zone->task, &e);
/*
* setnsec3param() will silently return early if the zone does not yet
* have a database. Prevent that by queueing the event up if zone->db
* is NULL. All events queued here are subsequently processed by
* receive_secure_db() if it ever gets called or simply freed by
* zone_free() otherwise.
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
zone_iattach(zone, &dummy);
isc_task_send(zone->task, &e);
} else {
ISC_LIST_APPEND(zone->setnsec3param_queue, e, ev_link);
e = NULL;
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
failure:
if (e != NULL)