8d996fd79c
If transferring or loading a mirror zone fails, resolution should still succeed by means of falling back to regular recursive queries. Currently, though, if a slave zone is present in the zone table and not loaded, a SERVFAIL response is generated. Thus, mirror zones need special handling in this regard. Add a new dns_zt_find() flag, DNS_ZTFIND_MIRROR, and set it every time a domain name is looked up rather than a zone itself. Handle that flag in dns_zt_find() in such a way that a mirror zone which is expired or not yet loaded is ignored when looking up domain names, but still possible to find when the caller wants to know whether the zone is configured. This causes a fallback to recursion when mirror zone data is unavailable without making unloaded mirror zones invisible to code checking a zone's existence.
15 lines
506 B
Plaintext
15 lines
506 B
Plaintext
; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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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 http://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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$TTL 3600
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@ SOA a.root-servers.nil. hostmaster 2000010100 3600 1200 604800 3600
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@ NS ns2
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ns2 A 10.53.0.2
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foo CNAME foo.example.
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