FreeBSDAdmin/DNS/reverse.pl

#!/usr/local/bin/bash
# Douglas Thrift
#
# Reverse
#
# $Id$

function usage()
{
        echo "Usage: `basename $0` [previous] hostname address"
        exit 1
}

case $# in
(2)
        if grep -Eq '^[-.a-z0-9]+$' <<<$1; then hostname=$1; else usage; fi
        if grep -Eq '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<<$2; then address=$2; else usage; fi
        ;;
(3)
        if grep -Eq '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<<$1; then previous=$1; else usage; fi
        if grep -Eq '^[-.a-z0-9]+$' <<<$2; then hostname=$2; else usage; fi
        if grep -Eq '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<<$3; then address=$3; else usage; fi
        ;;
(*)
        usage
        ;;
esac

function reverse()
{
        echo "`sed -Ee 's/^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/\4.\3.\2.\1/' <<<$1`.in-addr.arpa"
}

domainname=`reverse $address`
zonefile=master/$domainname

if [[ -z $previous ]]; then
        cat > $zonefile <<EOF
\$ORIGIN .
\$TTL 3600      ; 1 hour
$domainname     IN SOA  ns.douglasthrift.net. admin.douglasthrift.net. (
                                `date +%Y%m%d`01 ; serial
                                7200       ; refresh (2 hours)
                                3600       ; retry (1 hour)
                                604800     ; expire (1 week)
                                3600       ; minimum (1 hour)
                                )
                        NS      ns.douglasthrift.net.
                        PTR     $hostname.
EOF
        cat >> named.conf <<EOF

# $hostname
zone "$domainname" {
        type master;
        file "$zonefile";
};
EOF
else
        olddomainname=`reverse $previous`
        oldzonefile=master/$olddomainname
        sed -e "s/$olddomainname/$domainname/" -e "s/[0-9]{10} ; serial$/`date +%Y%m%d`01 ; serial/" $oldzonefile > $zonefile
        sed -i '' -e "s/$olddomainname/$domainname/" named.conf
        rm -f $oldzonefile
fi
Revision:	845
Committed:	2006-07-25T23:47:46-07:00 (18 years, 11 months ago) by douglas
Content type:	text/x-sh
Original Path:	*FreeBSDAdmin/DNS/reverse.sh*
File size:	1581 byte(s)
Log Message:	Woo!
#	User	Rev	Content
1	douglas	845	#!/usr/local/bin/bash
2			# Douglas Thrift
3			#
4			# Reverse
5			#
6			# $Id$
7
8			function usage()
9			{
10			echo "Usage: `basename $0` [previous] hostname address"
11			exit 1
12			}
13
14			case $# in
15			(2)
16			if grep -Eq '^[-.a-z0-9]+$' <<<$1; then hostname=$1; else usage; fi
17			if grep -Eq '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<<$2; then address=$2; else usage; fi
18			;;
19			(3)
20			if grep -Eq '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<<$1; then previous=$1; else usage; fi
21			if grep -Eq '^[-.a-z0-9]+$' <<<$2; then hostname=$2; else usage; fi
22			if grep -Eq '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$' <<<$3; then address=$3; else usage; fi
23			;;
24			(*)
25			usage
26			;;
27			esac
28
29			function reverse()
30			{
31			echo "`sed -Ee 's/^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/\4.\3.\2.\1/' <<<$1`.in-addr.arpa"
32			}
33
34			domainname=`reverse $address`
35			zonefile=master/$domainname
36
37			if [[ -z $previous ]]; then
38			cat > $zonefile <<EOF
39			\$ORIGIN .
40			\$TTL 3600 ; 1 hour
41			$domainname IN SOA ns.douglasthrift.net. admin.douglasthrift.net. (
42			`date +%Y%m%d`01 ; serial
43			7200 ; refresh (2 hours)
44			3600 ; retry (1 hour)
45			604800 ; expire (1 week)
46			3600 ; minimum (1 hour)
47			)
48			NS ns.douglasthrift.net.
49			PTR $hostname.
50			EOF
51			cat >> named.conf <<EOF
52
53			# $hostname
54			zone "$domainname" {
55			type master;
56			file "$zonefile";
57			};
58			EOF
59			else
60			olddomainname=`reverse $previous`
61			oldzonefile=master/$olddomainname
62			sed -e "s/$olddomainname/$domainname/" -e "s/[0-9]{10} ; serial$/`date +%Y%m%d`01 ; serial/" $oldzonefile > $zonefile
63			sed -i '' -e "s/$olddomainname/$domainname/" named.conf
64			rm -f $oldzonefile
65			fi