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#!/usr/bin/perl
# find_free.cgi
# Looks for free IP numbers
# by Ivan Andrian, <ivan.andrian@elettra.trieste.it>, 11/07/2000
use strict;
use warnings;
our (%access, %text, %in);
require './bind8-lib.pl';
&ReadParse();
my $zone = &get_zone_name_or_error($in{'zone'}, $in{'view'});
my $dom = $zone->{'name'};
my $file = $zone->{'file'};
my $type = $zone->{'type'};
if (!$access{'findfree'}) {&error($text{'findfree_nofind'})};
my $desc = &text('findfree_header', &arpa_to_ip($dom));
&ui_print_header($desc, &text('findfree_title'), "",
undef, undef, undef, undef, &restart_links($zone));
&find_ips($in{'zone'}, $in{'from'}, $in{'to'}, $in{'cf'});
if ($in{'from'} && $in{'to'}) {
# Do the search
my @allrecs = &read_zone_file($file, $dom);
my @recs = grep { ($_->{'type'} eq 'A') || ($_->{'type'} eq 'PTR')} @allrecs;
my @gens = grep { $_->{'generate'} } @allrecs;
foreach my $g (@gens) {
my ($start, $end, $skip);
my @gv = @{$g->{'generate'}};
if ($gv[0] =~ /^(\d+)-(\d+)\/(\d+)$/) {
$start = $1; $end = $2; $skip = $3;
}
elsif ($gv[0] =~ /^(\d+)-(\d+)$/) {
$start = $1; $end = $2; $skip = 1;
}
else { next; }
for(my $i=$start; $i<=$end; $i+=$skip) {
my $lhs = $gv[1];
$lhs =~ s/\$\$/\0/g;
$lhs =~ s/\$/$i/g;
$lhs =~ s/\0/\$/g;
my $lhsfull = $lhs =~ /\.$/ ? $lhs :
$dom eq "." ? "$lhs." : "$lhs.$dom";
my $rhs = $gv[3];
$rhs =~ s/\$\$/\0/g;
$rhs =~ s/\$/$i/g;
$rhs =~ s/\0/\$/g;
my $rhsfull = &check_ipaddress($rhs) ? $rhs :
$rhs =~ /\.$/ ? $rhs :
$dom eq "." ? "$rhs." : "$rhs.$dom";
push(@recs, { 'name' => $lhsfull,
'values' => [ $rhsfull ],
'type' => $gv[2],
'class' => 'IN' });
}
}
my $freeXXXcount=0;
my $freemaccount=0;
if (@recs) {
@recs = &sort_records(@recs);
my %frecs = &build_iprange($in{'from'}, $in{'to'});
for(my $i=0; $i<@recs; $i++) {
my $hip; # host IP
my $hname; # hostname
if ($recs[$i]->{'type'} eq 'A') {
$hip=$recs[$i]->{'values'}->[0]; # IP no. in 'values' field
$hname=$recs[$i]->{'name'}; # name in 'name' field
}
else {
$hip=&arpa_to_ip($recs[$i]->{'name'}); # IP no. in 'name' field
$hname=$recs[$i]->{'values'}->[0]; # name in 'values' field
}
# print "evaluating ", $hip, " ", $hname, "...<BR>"; #debug
if($in{'cf'} & ($hname=~ /^free.*/) & exists $frecs{$hip}) { # 'freeXXX' hostnames are free IP's!
# update
# print " updating: ",$hip, "... <BR>"; #debug
$frecs{$hip}->{'ttl'}=$recs[$i]->{'ttl'};
$frecs{$hip}->{'name'}=$hname;
$freeXXXcount++;
if($hname=~ /^freemac.*/) {$freemaccount++;}
}
else {
# print " deleting: ",$hip, "... <BR>"; #debug
delete $frecs{$hip};
}
}
# Show a message
my @frecs=sort ffree_ip_sort_func values %frecs;
print "<b>",&text('findfree_msg', scalar(@frecs)),"\n";
if ($in{'cf'}) {
print &text('findfree_msg2', $freeXXXcount, $freemaccount),"\n";
}
print "...</b><p>\n";
# Show all the IPs
&frecs_table(@frecs);
} # if(@recs)
} # if(@in >= 3)
&ui_print_footer("edit_$type.cgi?zone=$in{'zone'}&view=$in{'view'}",
$text{'recs_return'});
# build_iprange(fromIP, toIP)
# Returns a list of IP numbers from fromIP to toIP
sub build_iprange
{
$_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)/;
my @from = ($1, $2, $3, $4);
return @from if (@from != 4); #I want a correct IPv4 #
$_[1] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)/;
my @to = ($1, $2, $3, $4);
return @to if (@to != 4);
for (my $i=3;$i>=0;$i--) {
my $e = 0;
if ($from[$i] == 0) {
$from[$i] = 1;
$e++;
}
if ($to[$i] == 255) {
$to[$i] = 254;
$e++;
}
last if ($e);
}
my %frecs;
for (my $byte0=$from[0]; $byte0<=$to[0]; $byte0++) {
for (my $byte1=$byte0==$from[0]?$from[1]:1;
$byte1<=(($byte0==$to[0]?$to[1]:254));
$byte1++) {
for (my $byte2=($byte0==$from[0])&&($byte1==$from[1])?$from[2]:1;
$byte2<=(($byte0==$to[0])&&($byte1==$to[1])?$to[2]:254);
$byte2++) {
for (my $byte3=($byte0==$from[0])&&($byte1==$from[1])&&($byte2==$from[2])?$from[3]:1;
$byte3<=(($byte0==$to[0])&&($byte1==$to[1])&&($byte2==$to[2])?$to[3]:254);
$byte3++) {
$frecs{"$byte0.$byte1.$byte2.$byte3"}->{'ip'}="$byte0.$byte1.$byte2.$byte3";
$frecs{"$byte0.$byte1.$byte2.$byte3"}->{'ttl'}=$text{'default'};
$frecs{"$byte0.$byte1.$byte2.$byte3"}->{'name'}='';
} #for $byte3
} #for $byte2
} #for $byte1
} #for $byte0
return %frecs;
} # sub build_iprange
# find_ips (zonename, from_ip, to_ip, consider_freeXX_names)
# Display a form for searching for free IP nos
sub find_ips
{
print &ui_form_start("find_free.cgi");
print &ui_hidden("zone", $_[0]);
print &ui_hidden("view", $in{'view'});
print &ui_table_start($text{'findfree_sopt'}, undef, 2);
# Range start
print &ui_table_row($text{'findfree_fromip'},
&ui_textbox("from", $_[1], 20));
# Range end
print &ui_table_row($text{'findfree_toip'},
&ui_textbox("to", $_[2], 20));
# Handle freeXXX hostnames?
print &ui_table_row($text{'findfree_cf'},
&ui_yesno_radio("cf", $_[3]));
print &ui_table_end();
print &ui_form_end([ [ undef, $text{'findfree_search'} ] ]);
}
# frecs_table(array_of_freerecords)
sub frecs_table
{
print &ui_grid_table(
[ map { &ui_link("edit_recs.cgi?zone=$in{'zone'}&view=$in{'view'}&type=A&newvalue=$_->{'ip'}", $_->{'ip'}) } @_ ],
4, 100, [ "width=25%", "width=25%", "width=25%", "width=25%" ]);
}
sub ffree_ip_sort_func
{
$a->{'ip'} =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)/;
my ($a1, $a2, $a3, $a4) = ($1, $2, $3, $4);
$b->{'ip'} =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)/;
return $a1 < $1 ? -1 :
$a1 > $1 ? 1 :
$a2 < $2 ? -1 :
$a2 > $2 ? 1 :
$a3 < $3 ? -1 :
$a3 > $3 ? 1 :
$a4 < $4 ? -1 :
$a4 > $4 ? 1 : 0;
}
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