#!/bin/sh
#
# Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
#
# 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 ISC 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.

# \file
# This script is used in a couple of IXFR tests.
#
# Preconditions:\n
# The BIND 9 nameserver (ns1, 10.53.0.1, acting as the IXFR server) is loaded
# with the N-4 version of the zone.  (It may hold prior versions as well.)
# Notifications are disabled.
#
# The BIND 10 nameserver (nsx2, 10.53.0.2, acting as the IXFR client) is loaded
# with an earlier (unspecified) version of the zone.
#
# Actions:\n
# This script updates the IXFR server with the N-2 and N-0 versions of the zone.
# It then updates the BIND 10 configuration so that it looks for IXFRs from
# the IXFR server and causes the server to send the client a NOTIFY.  After
# waiting for the client to update from the server, it compares ther zones of
# the two system, reporting an error if they are different.
#
# Caller Actions:\n
# The caller can pre-load the BIND 10 IXFR client with whatever version of the
# zone it requires.  It can also load the BIND 9 IXFR server with zones earlier
# than N-4.
#
# After this test has finished, it is up to the caller to check the logs
# to see if they report the expected behavior.
#
# \return 0 if the script executed successfully, non-zero otherwise

# Set up variables etc.
. @abs_top_builddir@/tests/system/conf.sh
. $IXFR_TOP/ixfr_init.sh

set -e

# Store the SOA serial number of the BIND 10 client for later use.
old_client_serial=`$DIG_SOA @$CLIENT_IP | $AWK '{print $3}'`
echo "I:$CLIENT_NAME SOA serial of IXFR client is $old_client_serial"

# Load the BIND 9 system (the IXFR server) with the "n - 2" and "n" version of
# the zones.  With ixfr-from-differences set to "yes", the nameserver should
# generate the differences between them.
echo "I:$SERVER_NAME updating IXFR-server for ixfr-in tests"
update_server_zone $SERVER_NAME $SERVER_IP $IXFR_TOP/db.example.n2

# Wait a bit - it seems that if two updates are loaded in quick succession,
# the second sometimes gets lost.
sleep 5
update_server_zone $SERVER_NAME $SERVER_IP $IXFR_TOP/db.example.n0

echo "I:$CLIENT_NAME forcing IXFR client to retrieve new version of the zone"
$RUN_BINDCTL << .
Xfrin retransfer zone_name="example"
.

# Wait for the client to update itself.
wait_for_update $CLIENT_NAME $CLIENT_IP $old_client_serial

# Has updated, compare the client and server's versions of the zone s- they
# should be the same.
compare_zones $SERVER_NAME $SERVER_IP $CLIENT_NAME $CLIENT_IP

set +e