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dpavlin |
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#!/usr/bin/perl -w |
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# Sort bind zone file by IP number |
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# 2003-05-03 Dobrica Pavlinusic <dpavlin@rot13.org> |
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# |
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# parse files in format |
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# |
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# name A 111.222.333.444 |
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# name CNAME name |
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# |
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# and output sorted list |
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use strict; |
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my %a_rec; |
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my %cname; |
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while(<>) { |
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chomp; |
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my ($name,$type,$ip) = split (/\s+/,$_,3); |
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if (lc($type) eq "a") { |
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if ($ip =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/) { |
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my $i = ((((($1 * 255 + $2) * 255) + $3) * 255) + $4) * 100; |
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while ($a_rec{$i}) { $i++; } |
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#print "$i: $name $type $ip\n"; |
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$a_rec{$i} = [ $name, $type ,$ip ]; |
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} else { |
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print "; can't parse IP: $ip -- original line below:\n"; |
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print "; $name\t$type\t$ip\n"; |
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} |
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} elsif (lc($type) eq "cname") { |
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$cname{$ip} .= $name."\t"; |
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} else { |
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print "; unknown type: $type -- original line below:\n"; |
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print "; $name\t$type\t$ip\n"; |
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} |
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} |
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print ";\n"; |
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my $netmask_regex='^\d+\.\d+'; # bclass |
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my $net = ""; |
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foreach my $key (sort(keys %a_rec)) { |
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my ($name,$type,$ip) = @{$a_rec{$key}}; |
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if ($ip =~ /($netmask_regex)/) { |
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if ($1 ne $net) { |
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$net = $1; |
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print ";\n; network $net\n;\n"; |
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} |
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} else { |
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print "; can't parse $ip to find network!\n"; |
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} |
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# pretty format record |
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sub dump_rec { |
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my $name = shift @_; |
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print "$name\t"; |
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print "\t" if (length $name < 8); |
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print shift @_,"\t",shift @_,"\n"; |
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} |
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# dump a |
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dump_rec($name,$type,$ip); |
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# dump cname if exists |
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if ($cname{$a_rec{$key}[0]}) { |
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foreach my $alias (split(/\t/,$cname{$a_rec{$key}[0]})) { |
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undef $cname{$a_rec{$key}[0]}; |
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dump_rec($alias,"CNAME",$a_rec{$key}[0]); |
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} |
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} |
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} |
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print "; CNAME to CNAME\n"; |
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foreach my $alias (keys %cname) { |
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next if (! $cname{$alias}); |
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foreach my $host (split(/\t/,$cname{$alias})) { |
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dump_rec($host,"CNAME",$alias); |
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} |
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} |