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NEW: zone2dnscontrol: Convert zonefiles to DNSControl.
This commit is contained in:
Tom Limoncelli
22
misc/zone2dnscontrol/README.md
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22
misc/zone2dnscontrol/README.md
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# zone2dnscontrol -- Converts a standard DNS zonefile into a DNS zone.
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This script helps convert an old-style DNS zone file into the
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DNSControl language. It isn't perfect but it will do 99 percent
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of the work so you can focus on just fine-tuning it.
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You must give the script both the zone name (i.e. "stackoverflow.com")
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and the filename of the zonefile to read.
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Output is sent to stdout.
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Example:
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"""
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./convert stackoverflow.com zone.stackoverflow.com
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"""
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Caveats:
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* TTLs are stripped out and/or ignored.
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* `$INCLUDE` may not be handled correctly if you are not in the right directory.
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* `$GENERATE` is not handled at all.
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38
misc/zone2dnscontrol/awkfile.awk
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38
misc/zone2dnscontrol/awkfile.awk
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BEGIN {
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print ""
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print "D('" domain ", FILL_IN_REGISTRAR, DnsProvider(FILL_IN_PROVIDER),"
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}
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END {
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print "END)"
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}
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$3 == "SOA" || $4 == "SOA" {
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next
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}
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$3 == "A" || $3 == "CNAME" || $3 == "NS" {
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name = $1
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if (name == domain".") { name = "@" }
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print "\t" $3 "('" name "', '" $4 "')," ;
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next
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}
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$3 == "MX" {
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name = $1
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if (name == domain".") { name = "@" }
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print "\tMX('" name "', " $4 ", '" $5 "')," ;
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next
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}
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$3 == "TXT" {
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name = $1
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if (name == domain".") { name = "@" }
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$1 = "";
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$2 = "";
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$3 = "";
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print "\tTXT('" name "', " $0 ")," ;
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next
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}
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{ print "UNKNOWN:" $0 }
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144
misc/zone2dnscontrol/canonzone
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144
misc/zone2dnscontrol/canonzone
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#!/usr/bin/perl
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# Copyright 2005 Thomas A. Limoncelli
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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# canonzone [domain]
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# Purpose: Cannonicalize a zone file so that dumber scripts can have
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# an easier time parsing it.
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# Input: A real zone file with many formatting nasties.
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# Output: The zone file with one RR per line
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# $ORIGIN's removed
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# $TTL's removed
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# $INCLUDE's replaced with the file's contents
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# Lines that include TTL's have TTL's removed.
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# Lines that begin with whitespace turning into regular RR's
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# All hostnames turned into FQDN's (with exception listed below)
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# If a FQDN ends with [domain], it is removed.
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# Output in a strict format of:
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# HOSTNAME.domain.<TABS>IN<SPACE>TYPE<TAB>DATA\n
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# or for hosts in the [domain]:
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# HOSTNAME<TABS>IN<SPACE>TYPE<TAB>DATA\n
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#
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# Defaults:
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# If "domain" is left off the command line, we assume "bell-labs.com."
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#
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# TODO:
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# Handle $GENERATE better. Include an option that expands the hosts.
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#
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if ($ARGV[0] =~ /-n/) {
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shift @ARGV;
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$nostripend = 1;
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}
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# our defaults
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$origin = 'cibernet.com.';
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$origin = shift @ARGV if defined($ARGV[0]);
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$stripend = $origin; $stripend =~ s/(\.)/\\$1/g;
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#print STDERR "; $origin $stripend\n";
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die "ARGV[1] $stripend does not end in ." unless $stripend =~ /\.$/;
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die "ARGV[1] $origin does not end in ." unless $origin =~ /\.$/;
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# intialize things
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$defname = '';
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$host = '';
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#$noprevioushost = 1;
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&doit(STDIN);
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sub doit {
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local(*FILE) = @_;
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while (<FILE>) {
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# process whitespace, comments, and continuations:
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chomp;
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# the order of the next three lines is very important
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s/;.*//; # toss comments
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next if /^\s*$/; # skip blank lines
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redo if ( /\(/ && ! /\)/ ) && ($_ .= <>); # handle continuations
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# Handle the meta stuff:
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if (/^\$ORIGIN\s+/) { # handle the $ORIGIN statements
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($junk, $origin, @junk) = split;
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# $noprevioushost = 1;
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die "ORIGIN $origin does not end in ." unless $origin =~ /\.$/;
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chomp;
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next;
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} elsif (/^\$GENERATE\s+/) { # handle the $GENERATE statement
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s/\s+/ /g; # change whitespace to a single space
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print; print "\n";
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next;
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} elsif (/^\$TTL\s+/) { # handle the $TTL statement
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# do nothing
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next;
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} elsif (/^\$INCLUDE\s+/) { # handle the $INCLUDE statements
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($junk, $filename, @junk) = split;
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die "INCLUDE file doesn't exist" unless -f $filename;
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print "; INCLUDE BEGIN $filename\n";
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open(INCFILE, "<" . $filename) || die "Can not read $filename: $!";
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&doit(INCFILE);
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close INCFILE;
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print "; INCLUDE END $filename\n";
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next;
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} elsif (/^\$/) {
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die "ERROR1: I don't understand this \$ line: $_\n";
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}
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# ASSERTION at this point we know the line is just a RR.
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# if the line begins with whitespace, prepend the last host.
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# BUG: this may not handle "last host" across $INCLUDEs properly
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if (/^\s/) { # line begins with whitespace
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$_ = $defname . " " . $_;
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}
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# Extract the host, type, and data from the RR:
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if (/(\S+)\s+(\d*)\s+IN\s+(\S+)\s+(.*)/i) { # host ttl IN rrtype data
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($h, $junk, $TYPE, $data) = ($1, $2, $3, $4);
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#print "read: HOST:$h JUNK:$junk TYPE:$TYPE DATA:$data\n";
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} elsif (/(\S+)\s+IN\s+(\S+)\s+(.*)/i) { # host IN rrtype data
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($h, $TYPE, $data) = ($1, $2, $3);
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#print "read: HOST:$h TYPE:$TYPE DATA:$data\n";
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} elsif (/(\S+)\s+(\S+)\s+(.*)/i) { # host IN rrtype data
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($h, $TYPE, $data) = ($1, $2, $3);
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#print "read: HOST:$h TYPE:$TYPE DATA:$data\n";
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} else {
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die "ERROR2: I don't understand this line:\n$_\n";
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}
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$h = $origin if $h eq '@'; # "@" is shorthand for the origin
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# if the hostname is not a FQDN, append the $origin
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if ( $h =~ /\.$/ ) {
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$host = $h;
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} else {
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$host = $h . "." . $origin;
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}
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$defname = $host; # record what will be the next line's default hostname
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# remove the domain we are stripping the zone:
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$host =~ s/\.$stripend$//i unless $nostripend;
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# Format and print the RR:
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$TAB = ''; $TAB = "\t" if length($host) < 8;
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print "${host}\t${TAB}IN ${TYPE}\t$data\n";
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}
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}
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8
misc/zone2dnscontrol/zone2dnscontrol
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8
misc/zone2dnscontrol/zone2dnscontrol
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#! /usr/bin/env bash
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if [[ $# != 2 ]]; then
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echo "Usage: $0 zonename filename"
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exit 1
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fi
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./canonzone $1"." <$2 | awk -v domain="$1" -f ./awkfile.awk
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