2 # IP Address block list / checker
4 # This is a DXSpider compatible, optional skin over Net::CIDR::Lite
5 # If Net::CIDR::Lite is not present, then a find will always returns 0
20 use Socket qw(AF_INET AF_INET6 inet_pton inet_ntop);
23 our $badipfn = "badip";
31 return localdata($badipfn);
38 $fn .= ".$suffix" if $suffix;
39 my $fh = IO::File->new($fn);
52 unless (is_ipaddr($_)) {
54 LogDbg('err', qq(DXCIDR: $fn line $line: '$_' not an ip address));
56 LogDbg('err', qq(DXCIDR: More than 10 errors in $fn at/after line $line: '$_' - INVALID INPUT FILE));
64 LogDbg('err', "DXCIDR: $fn read error ($!)");
72 my @in = _read($suffix);
74 return scalar add(@in);
80 my $fn = _fn() . ".$suffix";
82 my $fh = IO::File->new (">$fn.$r");
85 for ($ipv4->list, $ipv6->list) {
90 LogDbg('cmd', "DXCIDR: put (re-)written $fn");
92 LogDbg('err', "DXCIDR: cannot write $fn.$r $!");
99 return 0 unless $active;
106 my $fn = _fn() . ".$suffix";
107 my $fh = IO::File->new;
108 if ($fh->open("$fn", "a+")) {
109 $fh->seek(0, 2); # belt and braces !!
110 print $fh "$_\n" for @in;
113 LogDbg('err', "DXCIDR::append error appending to $fn $!");
116 LogDbg('err', "DXCIDR::append require badip suffix");
123 return 0 unless $active;
127 # protect against stupid or malicious
128 next unless is_ipaddr($ip);
129 next if $ip =~ /^127\./;
130 next if $ip =~ /^::1$/;
135 } elsif ($ip =~ /:/) {
140 LogDbg('err', "DXCIDR::add non-ip address '$ip' read");
148 return unless $active;
150 if ($ipv4 && $count4) {
154 if ($ipv6 && $count6) {
166 push @in, [inet_pton(m|:|?AF_INET6:AF_INET, $ip[0]), @ip];
168 @out = sort {$a->[1] cmp $b->[1]} @in;
169 return map { "$_->[1]/$_->[2]"} @out;
174 return () unless $active;
176 push @out, $ipv4->list if $count4;
177 push @out, $ipv6->list if $count6;
183 return 0 unless $active;
184 return 0 unless $_[0];
187 return $ipv4->find($_[0]) if $count4;
189 return $ipv6->find($_[0]) if $count6;
194 eval { require Net::CIDR::Lite };
196 LogDbg('DXProt', "DXCIDR: load (cpanm) the perl module Net::CIDR::Lite to check for bad IP addresses (or CIDR ranges)");
200 import Net::CIDR::Lite;
205 move $fn, "$fn.base";
219 utime ($now, $now, $fn) || open (TMP, ">>$fn") || LogDbg('err', "DXCIDR::touch: Couldn't touch $fn: $!");
224 return 0 unless $active;
231 LogDbg('DXProt', "DXCIDR::reload reload database" );
234 opendir($dir, $main::local_data);
235 while (my $fn = readdir $dir) {
236 next unless my ($suffix) = $fn =~ /^badip\.(\w+)$/;
237 my $c = _load($suffix);
238 LogDbg('DXProt', "DXCIDR::reload: $fn read containing $c ip addresses" );
244 LogDbg('DXProt', "DXCIDR::reload $count ip addresses found (IPV4: $count4 IPV6: $count6) in $files badip files" );
251 return 0 unless $active;
253 $ipv4 = Net::CIDR::Lite->new;
254 $ipv6 = Net::CIDR::Lite->new;
255 $count4 = $count6 = 0;