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An existing SERVFAIL cache test is updated as it initially checks there are no EDE (the first SERVFAIL) then immediately re-does the same query, (still SERVFAIL), and expect the CACHED_ERROR EDE. However, the configuration used for this test to generate a SERVFAIL is a broken DNSSEC configuration, where the DNSKEY is not the expected one (it's a ZSK instead of a KZK). As a result, the first attempt also now raise an EDE (MISSING_DNSKEY).
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
# 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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import time
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import isctest
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from isctest.compat import EDECode
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def check_sfcache_ede(ns, ede):
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msg = isctest.query.create("foo.example.", "A")
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res = isctest.query.udp(msg, ns.ip)
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isctest.check.servfail(res)
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if ede:
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# The SERVFAIL is cached, so now it shows up the EDE CACHED_ERROR, but not the DNSKEY_MISSING.
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isctest.check.ede(res, EDECode.CACHED_ERROR)
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else:
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# example. domain DNSSEC is misconfigured on ns2, as it have two ZSK but no KSK. As a result, the DNSKEY for example. can't be found.
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isctest.check.ede(res, EDECode.DNSKEY_MISSING)
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def test_sfcache_ede(ns5, templates):
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# Reconfigure the server so servfail-ttl is 1 second
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templates.render("ns5/named.conf", {"servfail_ttl": 1})
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with ns5.watch_log_from_here() as watcher:
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ns5.rndc("reload")
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watcher.wait_for_line("running")
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# First query do not have a cached SERVFAIL, no EDE
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check_sfcache_ede(ns5, False)
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# Immediates next queries are cached SERVFAIL, EDE present
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check_sfcache_ede(ns5, True)
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check_sfcache_ede(ns5, True)
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# Wait enough time so we know he cached SERVFAIL is removed
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time.sleep(2)
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# And again, first query is not cached, subsequent ones are.
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check_sfcache_ede(ns5, False)
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check_sfcache_ede(ns5, True)
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check_sfcache_ede(ns5, True)
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