#!/bin/sh

set -e

[ "$1" = "configure" ] || exit 0
[ "$DEBIAN_SCRIPT_DEBUG" ] && set -vx

# Load CARNET Tools
. /usr/share/carnet-tools/functions.sh

echo "CN: Making sample configurations in /usr/share/doc/bind9-cn/examples"
echo "CN: Make sure you change them appropriately *before* running bind9 service!"

#variables
cp_get_ifaddr
CARNET_IPADDR=$RET
cp_get_netaddr
CARNET_NETADDR=$RET
CARNET_HOSTNAME=`hostname`
CARNET_DOMAINNAME=`hostname --domain`
CARNET_REV=`echo $CARNET_IPADDR | awk -F. '{ print $3 "." $2 "." $1 ".in-addr.arpa" }'`
SERNO=`date +%Y%m%d01`
BROJ=`echo $CARNET_IPADDR | cut -d. -f4`

echo "CN: Generating bind9 examples in /usr/share/doc/bind9-cn/examples"

# make example named.conf.local
cat > /usr/share/doc/bind9-cn/examples/named.conf.local <<EOF
zone "$CARNET_DOMAINNAME" in {
    type master;
    file "/etc/bind/hosts.db";
};

zone "$CARNET_REV" in {
    type master;
    file "/etc/bind/hosts.rev";
};
EOF

# make example named.conf.options
cat > /usr/share/doc/bind9-cn/examples/named.conf.options <<EOF
acl "xfer" {
    161.53.2.70;
    161.53.123.3;
    161.53.3.7;
    127.0.0.1;
};

acl "trusted" {
    $CARNET_NETADDR;
    127.0.0.0/8;
};

options {
    directory "/etc/bind";
    auth-nxdomain no;
    allow-transfer { xfer; };
    allow-recursion { trusted; };
    version "No version.";
    transfer-format many-answers;
    max-transfer-time-in 90;
    interface-interval 0;
    notify yes;
    listen-on-v6 { none; };
};

logging {
    category lame-servers { null; };
};
EOF

# make example hosts.db
cat > /usr/share/doc/bind9-cn/examples/hosts.db <<EOF
\$TTL 86400
@  SOA  $CARNET_HOSTNAME.$CARNET_DOMAINNAME. hostmaster.$CARNET_HOSTNAME.$CARNET_DOMAINNAME. (
    $SERNO   ; Serial
    28800    ; Refresh
    7200     ; Retry
    604800   ; Expire
    86400 )  ; Minimum
    NS  $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
    NS  bjesomar.srce.hr.
    A   $CARNET_IPADDR
    MX  5   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.

localhost.$CARNET_DOMAINNAME.   A       127.0.0.1
$CARNET_HOSTNAME.$CARNET_DOMAINNAME.      A     $CARNET_IPADDR

dns         CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
ns          CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
www         CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
proxy       CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
mail        CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
smtp        CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
pop         CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
imap        CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
ftp         CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
ntp         CNAME   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
EOF

# make example hosts.rev
cat > /usr/share/doc/bind9-cn/examples/hosts.rev <<EOF
\$TTL 86400
@  SOA  $CARNET_HOSTNAME.$CARNET_DOMAINNAME. hostmaster.$CARNET_HOSTNAME.$CARNET_DOMAINNAME. (
    $SERNO       ; Serial
    28800   ; Refresh
    7200    ; Retry
    604800  ; Expire
    86400 ) ; Minimum
    NS  $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
    NS  bjesomar.srce.hr.

$BROJ   PTR   $CARNET_HOSTNAME.$CARNET_DOMAINNAME.
EOF

# make example hosts
cat > /usr/share/doc/bind9-cn/examples/hosts <<EOF
# /etc/hosts - names & shortcuts to various hosts
127.0.0.1       localhost.$CARNET_DOMAINNAME localhost
$CARNET_IPADDR      $CARNET_HOSTNAME.$CARNET_DOMAINNAME $CARNET_HOSTNAME
EOF

# make example resolv.conf
cat > /usr/share/doc/bind9-cn/examples/resolv.conf <<EOF
search $CARNET_DOMAINNAME
nameserver 127.0.0.1
nameserver 161.53.123.3
nameserver 161.53.160.3
EOF

# check if named.conf has lame server logging
script='/^logging/,/^}/ { if ($0 ~ /category lame-servers/) { print "yes"; exit } }'
lameconf=
if [ -e /etc/bind/named.conf.options -a -e /etc/bind/named.conf ]; then
  lameconf=$(cat /etc/bind/named.conf /etc/bind/named.conf.options | awk "$script")
else
    if [ -e /etc/bind/named.conf ]; then
      lameconf=$(awk "$script" /etc/bind/named.conf)
    fi
fi
if [ "x$lameconf" != "xyes" ]; then
  if [ ! -e /etc/bind/named.conf.options ]; then
    touch /etc/bind/named.conf.options
  fi
  cp /etc/bind/named.conf.options /etc/bind/named.conf.options.$$
  cp-update bind9-cn /etc/bind/named.conf.options.$$ <<EOF
logging {
    category lame-servers { null; };
};
EOF
  cp_mv /etc/bind/named.conf.options.$$ /etc/bind/named.conf.options
    
  # reload
  echo "CN: Added lame-servers logging exclusion to named.conf.options"
  rndc reload || echo "CN: Reload didn't work, please check manually"
fi

if [ -e /etc/bind/named.conf.options ] && \
    fgrep -q 'query-source address * port 53' \
        /etc/bind/named.conf.options; then
        fgrep -v 'query-source address * port 53' \
            /etc/bind/named.conf.options > /etc/bind/named.conf.options.$$
    cp_mv /etc/bind/named.conf.options.$$ /etc/bind/named.conf.options
    echo "CN: Removing obsolete query-source directive"
    rndc reload || echo "CN: Reload didn't work, please check manually"
fi

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0