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systemd/test/units/testsuite-75.sh
Kiran Vemula 5ed91481ab resolved: added serve stale feature implementation of RFC 8767 
serve stale feature to keep the DNS resource records beyond TTL to return them as stale records in case of upstream server is not reachable or returns negative response.
SD_RESOLVED_NO_STALE flag has been added to disable serving stale records via dbus.
added serve stale test cases to TEST-75-RESOLVED
Fixes: #21815
2023-06-16 10:20:15 +01:00

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#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
# vi: ts=4 sw=4 tw=0 et:
# TODO:
# - IPv6-only stack
# - mDNS
# - LLMNR
# - DoT/DoH
set -eux
set -o pipefail
# shellcheck source=test/units/util.sh
. "$(dirname "$0")"/util.sh
: >/failed
RUN_OUT="$(mktemp)"
run() {
"$@" |& tee "$RUN_OUT"
}
disable_ipv6() {
sysctl -w net.ipv6.conf.all.disable_ipv6=1
}
enable_ipv6() {
sysctl -w net.ipv6.conf.all.disable_ipv6=0
networkctl reconfigure dns0
}
monitor_check_rr() (
set +x
set +o pipefail
local since="${1:?}"
local match="${2:?}"
# Wait until the first mention of the specified log message is
# displayed. We turn off pipefail for this, since we don't care about the
# lhs of this pipe expression, we only care about the rhs' result to be
# clean
timeout -v 30s journalctl -u resmontest.service --since "$since" -f --full | grep -m1 "$match"
)
# Test for resolvectl, resolvconf
systemctl unmask systemd-resolved.service
systemctl enable --now systemd-resolved.service
systemctl service-log-level systemd-resolved.service debug
ip link add hoge type dummy
ip link add hoge.foo type dummy
resolvectl dns hoge 10.0.0.1 10.0.0.2
resolvectl dns hoge.foo 10.0.0.3 10.0.0.4
assert_in '10.0.0.1 10.0.0.2' "$(resolvectl dns hoge)"
assert_in '10.0.0.3 10.0.0.4' "$(resolvectl dns hoge.foo)"
resolvectl dns hoge 10.0.1.1 10.0.1.2
resolvectl dns hoge.foo 10.0.1.3 10.0.1.4
assert_in '10.0.1.1 10.0.1.2' "$(resolvectl dns hoge)"
assert_in '10.0.1.3 10.0.1.4' "$(resolvectl dns hoge.foo)"
if ! RESOLVCONF=$(command -v resolvconf 2>/dev/null); then
TMPDIR=$(mktemp -d -p /tmp resolvconf-tests.XXXXXX)
RESOLVCONF="$TMPDIR"/resolvconf
ln -s "$(command -v resolvectl 2>/dev/null)" "$RESOLVCONF"
fi
echo nameserver 10.0.2.1 10.0.2.2 | "$RESOLVCONF" -a hoge
echo nameserver 10.0.2.3 10.0.2.4 | "$RESOLVCONF" -a hoge.foo
assert_in '10.0.2.1 10.0.2.2' "$(resolvectl dns hoge)"
assert_in '10.0.2.3 10.0.2.4' "$(resolvectl dns hoge.foo)"
echo nameserver 10.0.3.1 10.0.3.2 | "$RESOLVCONF" -a hoge.inet.ipsec.192.168.35
echo nameserver 10.0.3.3 10.0.3.4 | "$RESOLVCONF" -a hoge.foo.dhcp
assert_in '10.0.3.1 10.0.3.2' "$(resolvectl dns hoge)"
assert_in '10.0.3.3 10.0.3.4' "$(resolvectl dns hoge.foo)"
# Tests for _localdnsstub and _localdnsproxy
assert_in '127.0.0.53' "$(resolvectl query _localdnsstub)"
assert_in '_localdnsstub' "$(resolvectl query 127.0.0.53)"
assert_in '127.0.0.54' "$(resolvectl query _localdnsproxy)"
assert_in '_localdnsproxy' "$(resolvectl query 127.0.0.54)"
assert_in '127.0.0.53' "$(dig @127.0.0.53 _localdnsstub)"
assert_in '_localdnsstub' "$(dig @127.0.0.53 -x 127.0.0.53)"
assert_in '127.0.0.54' "$(dig @127.0.0.53 _localdnsproxy)"
assert_in '_localdnsproxy' "$(dig @127.0.0.53 -x 127.0.0.54)"
# Tests for mDNS and LLMNR settings
mkdir -p /run/systemd/resolved.conf.d
{
echo "[Resolve]"
echo "MulticastDNS=yes"
echo "LLMNR=yes"
} >/run/systemd/resolved.conf.d/mdns-llmnr.conf
systemctl restart systemd-resolved.service
systemctl service-log-level systemd-resolved.service debug
# make sure networkd is not running.
systemctl stop systemd-networkd.service
# defaults to yes (both the global and per-link settings are yes)
assert_in 'yes' "$(resolvectl mdns hoge)"
assert_in 'yes' "$(resolvectl llmnr hoge)"
# set per-link setting
resolvectl mdns hoge yes
resolvectl llmnr hoge yes
assert_in 'yes' "$(resolvectl mdns hoge)"
assert_in 'yes' "$(resolvectl llmnr hoge)"
resolvectl mdns hoge resolve
resolvectl llmnr hoge resolve
assert_in 'resolve' "$(resolvectl mdns hoge)"
assert_in 'resolve' "$(resolvectl llmnr hoge)"
resolvectl mdns hoge no
resolvectl llmnr hoge no
assert_in 'no' "$(resolvectl mdns hoge)"
assert_in 'no' "$(resolvectl llmnr hoge)"
# downgrade global setting to resolve
{
echo "[Resolve]"
echo "MulticastDNS=resolve"
echo "LLMNR=resolve"
} >/run/systemd/resolved.conf.d/mdns-llmnr.conf
systemctl restart systemd-resolved.service
systemctl service-log-level systemd-resolved.service debug
# set per-link setting
resolvectl mdns hoge yes
resolvectl llmnr hoge yes
assert_in 'resolve' "$(resolvectl mdns hoge)"
assert_in 'resolve' "$(resolvectl llmnr hoge)"
resolvectl mdns hoge resolve
resolvectl llmnr hoge resolve
assert_in 'resolve' "$(resolvectl mdns hoge)"
assert_in 'resolve' "$(resolvectl llmnr hoge)"
resolvectl mdns hoge no
resolvectl llmnr hoge no
assert_in 'no' "$(resolvectl mdns hoge)"
assert_in 'no' "$(resolvectl llmnr hoge)"
# downgrade global setting to no
{
echo "[Resolve]"
echo "MulticastDNS=no"
echo "LLMNR=no"
} >/run/systemd/resolved.conf.d/mdns-llmnr.conf
systemctl restart systemd-resolved.service
systemctl service-log-level systemd-resolved.service debug
# set per-link setting
resolvectl mdns hoge yes
resolvectl llmnr hoge yes
assert_in 'no' "$(resolvectl mdns hoge)"
assert_in 'no' "$(resolvectl llmnr hoge)"
resolvectl mdns hoge resolve
resolvectl llmnr hoge resolve
assert_in 'no' "$(resolvectl mdns hoge)"
assert_in 'no' "$(resolvectl llmnr hoge)"
resolvectl mdns hoge no
resolvectl llmnr hoge no
assert_in 'no' "$(resolvectl mdns hoge)"
assert_in 'no' "$(resolvectl llmnr hoge)"
# Cleanup
rm -f /run/systemd/resolved.conf.d/mdns-llmnr.conf
ip link del hoge
ip link del hoge.foo
### SETUP ###
# Configure network
hostnamectl hostname ns1.unsigned.test
{
echo "10.0.0.1 ns1.unsigned.test"
echo "fd00:dead:beef:cafe::1 ns1.unsigned.test"
} >>/etc/hosts
mkdir -p /etc/systemd/network
cat >/etc/systemd/network/dns0.netdev <<EOF
[NetDev]
Name=dns0
Kind=dummy
EOF
cat >/etc/systemd/network/dns0.network <<EOF
[Match]
Name=dns0
[Network]
Address=10.0.0.1/24
Address=fd00:dead:beef:cafe::1/64
DNSSEC=allow-downgrade
DNS=10.0.0.1
DNS=fd00:dead:beef:cafe::1
EOF
DNS_ADDRESSES=(
"10.0.0.1"
"fd00:dead:beef:cafe::1"
)
mkdir -p /run/systemd/resolved.conf.d
{
echo "[Resolve]"
echo "FallbackDNS="
echo "DNSSEC=allow-downgrade"
echo "DNSOverTLS=opportunistic"
} >/run/systemd/resolved.conf.d/test.conf
ln -svf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
# Override the default NTA list, which turns off DNSSEC validation for (among
# others) the test. domain
mkdir -p "/etc/dnssec-trust-anchors.d/"
echo local >/etc/dnssec-trust-anchors.d/local.negative
# Sign the root zone
keymgr . generate algorithm=ECDSAP256SHA256 ksk=yes zsk=yes
# Create a trust anchor for resolved with our root zone
keymgr . ds | sed 's/ DS/ IN DS/g' >/etc/dnssec-trust-anchors.d/root.positive
# Create a bind-compatible trust anchor (for delv)
# Note: the trust-anchors directive is relatively new, so use the original
# managed-keys one until it's widespread enough
{
echo 'managed-keys {'
keymgr . dnskey | sed -r 's/^\. DNSKEY ([0-9]+ [0-9]+ [0-9]+) (.+)$/. static-key \1 "\2";/g'
echo '};'
} >/etc/bind.keys
# Create an /etc/bind/bind.keys symlink, which is used by delv on Ubuntu
mkdir -p /etc/bind
ln -svf /etc/bind.keys /etc/bind/bind.keys
# Start the services
systemctl unmask systemd-networkd
systemctl start systemd-networkd
systemctl restart systemd-resolved
# Create knot's runtime dir, since from certain version it's provided only by
# the package and not created by tmpfiles/systemd
if [[ ! -d /run/knot ]]; then
mkdir -p /run/knot
chown -R knot:knot /run/knot
fi
systemctl start knot
# Wait a bit for the keys to propagate
sleep 4
networkctl status
resolvectl status
resolvectl log-level debug
# Start monitoring queries
systemd-run -u resmontest.service -p Type=notify resolvectl monitor
# Check if all the zones are valid (zone-check always returns 0, so let's check
# if it produces any errors/warnings)
run knotc zone-check
[[ ! -s "$RUN_OUT" ]]
# We need to manually propagate the DS records of onlinesign.test. to the parent
# zone, since they're generated online
knotc zone-begin test.
if knotc zone-get test. onlinesign.test. ds | grep .; then
# Drop any old DS records, if present (e.g. on test re-run)
knotc zone-unset test. onlinesign.test. ds
fi
# Propagate the new DS records
while read -ra line; do
knotc zone-set test. "${line[0]}" 600 "${line[@]:1}"
done < <(keymgr onlinesign.test. ds)
knotc zone-commit test.
knotc reload
### SETUP END ###
: "--- nss-resolve/nss-myhostname tests"
# Sanity check
TIMESTAMP=$(date '+%F %T')
# Issue: https://github.com/systemd/systemd/issues/23951
# With IPv6 enabled
run getent -s resolve hosts ns1.unsigned.test
grep -qE "^fd00:dead:beef:cafe::1\s+ns1\.unsigned\.test" "$RUN_OUT"
monitor_check_rr "$TIMESTAMP" "ns1.unsigned.test IN AAAA fd00:dead:beef:cafe::1"
# With IPv6 disabled
# Issue: https://github.com/systemd/systemd/issues/23951
# FIXME
#disable_ipv6
#run getent -s resolve hosts ns1.unsigned.test
#grep -qE "^10\.0\.0\.1\s+ns1\.unsigned\.test" "$RUN_OUT"
#monitor_check_rr "$TIMESTAMP" "ns1.unsigned.test IN A 10.0.0.1"
enable_ipv6
# Issue: https://github.com/systemd/systemd/issues/18812
# PR: https://github.com/systemd/systemd/pull/18896
# Follow-up issue: https://github.com/systemd/systemd/issues/23152
# Follow-up PR: https://github.com/systemd/systemd/pull/23161
# With IPv6 enabled
run getent -s resolve hosts localhost
grep -qE "^::1\s+localhost" "$RUN_OUT"
run getent -s myhostname hosts localhost
grep -qE "^::1\s+localhost" "$RUN_OUT"
# With IPv6 disabled
disable_ipv6
run getent -s resolve hosts localhost
grep -qE "^127\.0\.0\.1\s+localhost" "$RUN_OUT"
run getent -s myhostname hosts localhost
grep -qE "^127\.0\.0\.1\s+localhost" "$RUN_OUT"
enable_ipv6
: "--- Basic resolved tests ---"
# Issue: https://github.com/systemd/systemd/issues/22229
# PR: https://github.com/systemd/systemd/pull/22231
FILTERED_NAMES=(
"0.in-addr.arpa"
"255.255.255.255.in-addr.arpa"
"0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa"
"hello.invalid"
)
for name in "${FILTERED_NAMES[@]}"; do
(! run host "$name")
grep -qF "NXDOMAIN" "$RUN_OUT"
done
# Follow-up
# Issue: https://github.com/systemd/systemd/issues/22401
# PR: https://github.com/systemd/systemd/pull/22414
run dig +noall +authority +comments SRV .
grep -qF "status: NOERROR" "$RUN_OUT"
grep -qE "IN\s+SOA\s+ns1\.unsigned\.test\." "$RUN_OUT"
: "--- ZONE: unsigned.test. ---"
run dig @ns1.unsigned.test +short unsigned.test A unsigned.test AAAA
grep -qF "10.0.0.101" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::101" "$RUN_OUT"
run resolvectl query unsigned.test
grep -qF "10.0.0.10" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::101" "$RUN_OUT"
grep -qF "authenticated: no" "$RUN_OUT"
run dig @ns1.unsigned.test +short MX unsigned.test
grep -qF "15 mail.unsigned.test." "$RUN_OUT"
run resolvectl query --legend=no -t MX unsigned.test
grep -qF "unsigned.test IN MX 15 mail.unsigned.test" "$RUN_OUT"
: "--- ZONE: signed.test (static DNSSEC) ---"
# Check the trust chain (with and without systemd-resolved in between
# Issue: https://github.com/systemd/systemd/issues/22002
# PR: https://github.com/systemd/systemd/pull/23289
run delv @ns1.unsigned.test signed.test
grep -qF "; fully validated" "$RUN_OUT"
run delv signed.test
grep -qF "; fully validated" "$RUN_OUT"
for addr in "${DNS_ADDRESSES[@]}"; do
run delv "@$addr" -t A mail.signed.test
grep -qF "; fully validated" "$RUN_OUT"
run delv "@$addr" -t AAAA mail.signed.test
grep -qF "; fully validated" "$RUN_OUT"
done
run resolvectl query mail.signed.test
grep -qF "10.0.0.11" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::11" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
run dig +short signed.test
grep -qF "10.0.0.10" "$RUN_OUT"
run resolvectl query signed.test
grep -qF "signed.test: 10.0.0.10" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
run dig @ns1.unsigned.test +short MX signed.test
grep -qF "10 mail.signed.test." "$RUN_OUT"
run resolvectl query --legend=no -t MX signed.test
grep -qF "signed.test IN MX 10 mail.signed.test" "$RUN_OUT"
# Check a non-existent domain
run dig +dnssec this.does.not.exist.signed.test
grep -qF "status: NXDOMAIN" "$RUN_OUT"
# Check a wildcard record
run resolvectl query -t TXT this.should.be.authenticated.wild.signed.test
grep -qF 'this.should.be.authenticated.wild.signed.test IN TXT "this is a wildcard"' "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
# Check SRV support
run resolvectl service _mysvc._tcp signed.test
grep -qF "myservice.signed.test:1234" "$RUN_OUT"
grep -qF "10.0.0.20" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::17" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
(! run resolvectl service _invalidsvc._udp signed.test)
grep -qE "invalidservice\.signed\.test' not found" "$RUN_OUT"
run resolvectl service _untrustedsvc._udp signed.test
grep -qF "myservice.untrusted.test:1111" "$RUN_OUT"
grep -qF "10.0.0.123" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::123" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
# Check OPENPGPKEY support
run delv -t OPENPGPKEY 5a786cdc59c161cdafd818143705026636962198c66ed4c5b3da321e._openpgpkey.signed.test
grep -qF "; fully validated" "$RUN_OUT"
run resolvectl openpgp mr.smith@signed.test
grep -qF "5a786cdc59c161cdafd818143705026636962198c66ed4c5b3da321e._openpgpkey.signed.test" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
# DNSSEC validation with multiple records of the same type for the same name
# Issue: https://github.com/systemd/systemd/issues/22002
# PR: https://github.com/systemd/systemd/pull/23289
check_domain() {
local domain="${1:?}"
local record="${2:?}"
local message="${3:?}"
local addr
for addr in "${DNS_ADDRESSES[@]}"; do
run delv "@$addr" -t "$record" "$domain"
grep -qF "$message" "$RUN_OUT"
done
run delv -t "$record" "$domain"
grep -qF "$message" "$RUN_OUT"
run resolvectl query "$domain"
grep -qF "authenticated: yes" "$RUN_OUT"
}
check_domain "dupe.signed.test" "A" "; fully validated"
check_domain "dupe.signed.test" "AAAA" "; negative response, fully validated"
check_domain "dupe-ipv6.signed.test" "AAAA" "; fully validated"
check_domain "dupe-ipv6.signed.test" "A" "; negative response, fully validated"
check_domain "dupe-mixed.signed.test" "A" "; fully validated"
check_domain "dupe-mixed.signed.test" "AAAA" "; fully validated"
# Test resolution of CNAME chains
TIMESTAMP=$(date '+%F %T')
run resolvectl query -t A cname-chain.signed.test
grep -qF "follow14.final.signed.test IN A 10.0.0.14" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
monitor_check_rr "$TIMESTAMP" "follow10.so.close.signed.test IN CNAME follow11.yet.so.far.signed.test"
monitor_check_rr "$TIMESTAMP" "follow11.yet.so.far.signed.test IN CNAME follow12.getting.hot.signed.test"
monitor_check_rr "$TIMESTAMP" "follow12.getting.hot.signed.test IN CNAME follow13.almost.final.signed.test"
monitor_check_rr "$TIMESTAMP" "follow13.almost.final.signed.test IN CNAME follow14.final.signed.test"
monitor_check_rr "$TIMESTAMP" "follow14.final.signed.test IN A 10.0.0.14"
# Non-existing RR + CNAME chain
run dig +dnssec AAAA cname-chain.signed.test
grep -qF "status: NOERROR" "$RUN_OUT"
grep -qE "^follow14\.final\.signed\.test\..+IN\s+NSEC\s+" "$RUN_OUT"
: "--- ZONE: onlinesign.test (dynamic DNSSEC) ---"
# Check the trust chain (with and without systemd-resolved in between
# Issue: https://github.com/systemd/systemd/issues/22002
# PR: https://github.com/systemd/systemd/pull/23289
run delv @ns1.unsigned.test sub.onlinesign.test
grep -qF "; fully validated" "$RUN_OUT"
run delv sub.onlinesign.test
grep -qF "; fully validated" "$RUN_OUT"
run dig +short sub.onlinesign.test
grep -qF "10.0.0.133" "$RUN_OUT"
run resolvectl query sub.onlinesign.test
grep -qF "sub.onlinesign.test: 10.0.0.133" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
run dig @ns1.unsigned.test +short TXT onlinesign.test
grep -qF '"hello from onlinesign"' "$RUN_OUT"
run resolvectl query --legend=no -t TXT onlinesign.test
grep -qF 'onlinesign.test IN TXT "hello from onlinesign"' "$RUN_OUT"
for addr in "${DNS_ADDRESSES[@]}"; do
run delv "@$addr" -t A dual.onlinesign.test
grep -qF "10.0.0.135" "$RUN_OUT"
run delv "@$addr" -t AAAA dual.onlinesign.test
grep -qF "fd00:dead:beef:cafe::135" "$RUN_OUT"
run delv "@$addr" -t ANY ipv6.onlinesign.test
grep -qF "fd00:dead:beef:cafe::136" "$RUN_OUT"
done
run resolvectl query dual.onlinesign.test
grep -qF "10.0.0.135" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::135" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
run resolvectl query ipv6.onlinesign.test
grep -qF "fd00:dead:beef:cafe::136" "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
# Check a non-existent domain
# Note: mod-onlinesign utilizes Minimally Covering NSEC Records, hence the
# different response than with "standard" DNSSEC
run dig +dnssec this.does.not.exist.onlinesign.test
grep -qF "status: NOERROR" "$RUN_OUT"
grep -qF "NSEC \\000.this.does.not.exist.onlinesign.test." "$RUN_OUT"
# Check a wildcard record
run resolvectl query -t TXT this.should.be.authenticated.wild.onlinesign.test
grep -qF 'this.should.be.authenticated.wild.onlinesign.test IN TXT "this is an onlinesign wildcard"' "$RUN_OUT"
grep -qF "authenticated: yes" "$RUN_OUT"
# Resolve via dbus method
TIMESTAMP=$(date '+%F %T')
run busctl call org.freedesktop.resolve1 /org/freedesktop/resolve1 org.freedesktop.resolve1.Manager ResolveHostname 'isit' 0 secondsub.onlinesign.test 0 0
grep -qF '10 0 0 134 "secondsub.onlinesign.test"' "$RUN_OUT"
monitor_check_rr "$TIMESTAMP" "secondsub.onlinesign.test IN A 10.0.0.134"
: "--- ZONE: untrusted.test (DNSSEC without propagated DS records) ---"
# Issue: https://github.com/systemd/systemd/issues/23955
# FIXME
resolvectl flush-caches
#run dig +short untrusted.test A untrusted.test AAAA
#grep -qF "10.0.0.121" "$RUN_OUT"
#grep -qF "fd00:dead:beef:cafe::121" "$RUN_OUT"
run resolvectl query untrusted.test
grep -qF "untrusted.test:" "$RUN_OUT"
grep -qF "10.0.0.121" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::121" "$RUN_OUT"
grep -qF "authenticated: no" "$RUN_OUT"
run resolvectl service _mysvc._tcp untrusted.test
grep -qF "myservice.untrusted.test:1234" "$RUN_OUT"
grep -qF "10.0.0.123" "$RUN_OUT"
grep -qF "fd00:dead:beef:cafe::123" "$RUN_OUT"
# Issue: https://github.com/systemd/systemd/issues/19472
# 1) Query for a non-existing RR should return NOERROR + NSEC (?), not NXDOMAIN
# FIXME: re-enable once the issue is resolved
#run dig +dnssec AAAA untrusted.test
#grep -qF "status: NOERROR" "$RUN_OUT"
#grep -qE "^untrusted\.test\..+IN\s+NSEC\s+" "$RUN_OUT"
## 2) Query for a non-existing name should return NXDOMAIN, not SERVFAIL
#run dig +dnssec this.does.not.exist.untrusted.test
#grep -qF "status: NXDOMAIN" "$RUN_OUT"
systemctl stop resmontest.service
# Test serve stale feature if nftables is installed
if command -v nft >/dev/null; then
### Test without serve stale feature ###
NFT_FILTER_NAME=dns_port_filter
drop_dns_outbound_traffic() {
nft add table inet $NFT_FILTER_NAME
nft add chain inet $NFT_FILTER_NAME output \{ type filter hook output priority 0 \; \}
nft add rule inet $NFT_FILTER_NAME output ip daddr 10.0.0.1 udp dport 53 drop
nft add rule inet $NFT_FILTER_NAME output ip daddr 10.0.0.1 tcp dport 53 drop
nft add rule inet $NFT_FILTER_NAME output ip6 daddr fd00:dead:beef:cafe::1 udp dport 53 drop
nft add rule inet $NFT_FILTER_NAME output ip6 daddr fd00:dead:beef:cafe::1 tcp dport 53 drop
}
run dig stale1.unsigned.test -t A
grep -qE "NOERROR" "$RUN_OUT"
sleep 2
drop_dns_outbound_traffic
set +e
run dig stale1.unsigned.test -t A
set -eux
grep -qE "no servers could be reached" "$RUN_OUT"
nft flush ruleset
### Test TIMEOUT with serve stale feature ###
mkdir -p /run/systemd/resolved.conf.d
{
echo "[Resolve]"
echo "StaleRetentionSec=1d"
} >/run/systemd/resolved.conf.d/test.conf
ln -svf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
systemctl restart systemd-resolved.service
systemctl service-log-level systemd-resolved.service debug
run dig stale1.unsigned.test -t A
grep -qE "NOERROR" "$RUN_OUT"
sleep 2
drop_dns_outbound_traffic
run dig stale1.unsigned.test -t A
grep -qE "NOERROR" "$RUN_OUT"
grep -qE "10.0.0.112" "$RUN_OUT"
nft flush ruleset
### Test NXDOMAIN with serve stale feature ###
# NXDOMAIN response should replace the cache with NXDOMAIN response
run dig stale1.unsigned.test -t A
grep -qE "NOERROR" "$RUN_OUT"
# Delete stale1 record from zone
knotc zone-begin unsigned.test
knotc zone-unset unsigned.test stale1 A
knotc zone-commit unsigned.test
knotc reload
sleep 2
run dig stale1.unsigned.test -t A
grep -qE "NXDOMAIN" "$RUN_OUT"
nft flush ruleset
else
echo "nftables is not installed. Skipped serve stale feature test."
fi
touch /testok
rm /failed
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