From 3b9b6d0b8e7f798023c9d109c490449d528fde80 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 17:59:48 +0200
Subject: Adding upstream version 1:9.18.19.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 bin/tests/system/dyndb/driver/README | 92 ++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 bin/tests/system/dyndb/driver/README

(limited to 'bin/tests/system/dyndb/driver/README')

diff --git a/bin/tests/system/dyndb/driver/README b/bin/tests/system/dyndb/driver/README
new file mode 100644
index 0000000..db73396
--- /dev/null
+++ b/bin/tests/system/dyndb/driver/README
@@ -0,0 +1,92 @@
+<!--
+Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+
+SPDX-License-Identifier: MPL-2.0 and ISC
+
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0.  If a copy of the MPL was not distributed with this
+file, you can obtain one at https://mozilla.org/MPL/2.0/.
+
+See the COPYRIGHT file distributed with this work for additional
+information regarding copyright ownership.
+
+Copyright (C) Red Hat
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND AUTHORS DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+-->
+
+To use the Dynamic DB sample driver, run named and check the log.
+
+    $ cd testing
+    $ named -gc named.conf
+
+You should be able to see something like:
+
+zone test/IN: loaded serial 0
+zone arpa/IN: loaded serial 0
+
+This means that the sample driver created empty zones "test." and
+"arpa." as defined by "arg" parameters in named.conf.
+
+$ dig @localhost test.
+
+should work as usual and you should be able to see the dummy zone with
+NS record pointing to the zone apex and A record with 127.0.0.1:
+
+;; ANSWER SECTION:
+test.			86400	IN	A	127.0.0.1
+test.			86400	IN	NS	test.
+test.			86400	IN	SOA	test. test. 0 28800 7200 604800 86400
+
+This driver creates two empty zones and allows query/transfer/update to
+all IP addresses for demonstration purposes.
+
+The driver wraps the RBT database implementation used natively by BIND,
+and modifies the addrdataset() and substractrdataset() functions to do
+additional work during dynamic updates.
+
+A dynamic update modifies the target zone as usual. After that, the
+driver detects whether the modified RR was of type A or AAAA, and if so,
+attempts to appropriately generate or delete a matching PTR record in
+one of the two zones managed by the driver.
+
+E.g.:
+
+$ nsupdate
+> update add a.test. 300 IN A 192.0.2.1
+> send
+
+will add the A record
+a.test.			300	IN	A	192.0.2.1
+
+and also automatically generate the PTR record
+1.2.0.192.in-addr.arpa.	300	IN	PTR	a.test.
+
+AXFR and RR deletion via dynamic updates should work as usual. Deletion
+of a type A or AAAA record should delete the corresponding PTR record
+too.
+
+The zone is stored only in memory, and all changes will be lost on
+reload/reconfig.
+
+Hints for code readers:
+- Driver initialization starts in driver.c: dyndb_init() function.
+- New database implementation is registered by calling dns_db_register()
+  and passing a function pointer to it. This sample uses the function
+  create_db() to initialize the database.
+- Zones are created later in instance.c: load_sample_instance_zones().
+- Database entry points are in structure db.c: dns_dbmethods_t
+  sampledb_methods
+- sampledb_methods points to an implementation of the database interface.
+  See the db.c: addrdataset() implementation and look at how the RBT
+  database instance is wrapped into an additional layer of logic.
-- 
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