1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
package Zonemaster::Engine::ASNLookup;
use v5.16.0;
use warnings;
use version; our $VERSION = version->declare( "v1.0.11" );
use Zonemaster::Engine;
use Zonemaster::Engine::Util qw( name );
use Zonemaster::Engine::Nameserver;
use Zonemaster::Engine::Profile;
use IO::Socket;
use IO::Socket::INET;
use Net::IP::XS;
use Scalar::Util qw( looks_like_number );
our @db_sources;
our $db_style;
sub get_with_prefix {
my ( $class, $ip ) = @_;
if ( not @db_sources ) {
$db_style = Zonemaster::Engine::Profile->effective->get( q{asn_db.style} );
my %db_sources = %{ Zonemaster::Engine::Profile->effective->get( q{asn_db.sources} ) };
@db_sources = map { name( $_ ) } @{ $db_sources{ $db_style } };
}
if ( not ref( $ip ) or not $ip->isa( 'Net::IP::XS' ) ) {
$ip = Net::IP::XS->new( $ip );
}
if ( not @db_sources ) {
die "ASN database sources undefined";
}
my ( $asnref, $prefix, $raw, $ret_code );
if ( $db_style eq q{cymru} ) {
( $asnref, $prefix, $raw, $ret_code ) = _cymru_asn_lookup($ip);
}
elsif ( $db_style eq q{ripe} ) {
( $asnref, $prefix, $raw, $ret_code ) = _ripe_asn_lookup($ip);
}
else {
if ( not $db_style ) {
die "ASN database style undefined";
}
else {
die "ASN database style value '$db_style' is illegal";
}
}
map { looks_like_number( $_ ) || die "ASN lookup value isn't numeric: '$_'" } @$asnref;
return ( $asnref, $prefix, $raw, $ret_code );
} ## end sub get_with_prefix
sub _cymru_asn_lookup {
my $ip = shift;
my @asns = ();
my $db_source_nb = 0;
foreach my $db_source ( @db_sources ) {
Zonemaster::Engine->logger->add( ASN_LOOKUP_SOURCE => { name => $db_source } );
my $reverse = $ip->reverse_ip;
my $domain = $db_source->string;
my $pair = {
'in-addr.arpa.' => "origin.$domain",
'ip6.arpa.' => "origin6.$domain",
};
$db_source_nb++;
foreach my $root ( keys %{$pair} ) {
if ( $reverse =~ s/$root/$pair->{$root}/ix ) {
my $p = Zonemaster::Engine->recurse( $reverse, 'TXT' );
if ( $p ) {
if ( $p->rcode eq q{NXDOMAIN} ) {
if ( $p->get_records( 'SOA', 'authority' ) and scalar $p->get_records( 'SOA', 'authority' ) == 1 and ($p->get_records( 'SOA', 'authority' ))[0]->owner eq name( $db_source ) ) {
return \@asns, undef, q{}, q{EMPTY_ASN_SET};
}
}
elsif ( $p->rcode eq q{NOERROR} ) {
if ( $p->answer ) {
my @rr = $p->get_records( 'TXT', 'answer' );
if ( @rr ) {
my $max_length = 0;
my @fields;
my $str;
foreach my $rr ( @rr ) {
my $_str = $rr->txtdata;
my @_fields = split( /[ ][|][ ]?/x, $_str );
next if scalar @_fields <= 1;
return \@asns, undef, q{}, q{ERROR_ASN_DATABASE} unless Net::IP::XS->new( $_fields[1] )->overlaps( $ip );
my @_asns = split( /\s+/x, $_fields[0] );
my $_prefix_length = ($_fields[1] =~ m!^.*[/](.*)!x)[0];
if ( $_prefix_length > $max_length ) {
$str = $_str;
@asns = @_asns;
@fields = @_fields;
$max_length = $_prefix_length;
}
}
if ( @fields ) {
if ( Net::IP::XS->new( $fields[1] )->overlaps( $ip ) ) {
return \@asns, Net::IP::XS->new( $fields[1] ), $str, q{AS_FOUND}
}
}
else {
return \@asns, undef, q{}, q{EMPTY_ASN_SET};
}
}
return \@asns, undef, q{}, q{ERROR_ASN_DATABASE};
}
return \@asns, undef, q{}, q{EMPTY_ASN_SET};
}
}
if ( $db_source_nb == scalar @db_sources ) {
return \@asns, undef, q{}, q{ERROR_ASN_DATABASE};
}
last;
}
}
} ## end foreach my $db_source ( @db_sources )
return;
}
sub _ripe_asn_lookup {
my $ip = shift;
my @asns = ();
my $db_source_nb = 0;
foreach my $db_source ( @db_sources ) {
$db_source_nb++;
my $socket = IO::Socket::INET->new( PeerAddr => $db_source->string,
PeerPort => q{43},
Proto => q{tcp} );
unless ( $socket ) {
if ( $db_source_nb == scalar @db_sources ) {
return \@asns, undef, q{}, q{ERROR_ASN_DATABASE};
}
else {
next;
}
};
printf $socket "-F -M %s\n", $ip->short();
my $data;
my $str;
my $has_answer = 0;
while ( defined ($data = <$socket>) ) {
$has_answer = 1;
chop $data;
if ( $data !~ /^%/x and $data !~ /^\s*$/x ) {
$str = $data;
last;
}
}
$socket->close();
if ( not $has_answer ) {
if ( $db_source_nb == scalar @db_sources ) {
return \@asns, undef, q{}, q{ERROR_ASN_DATABASE};
}
else {
next;
}
}
elsif ( $str ) {
my @fields = split( /\s+/x, $str );
my @asns = split( '/', $fields[0] );
return \@asns, Net::IP::XS->new( $fields[1] ), $str, q{AS_FOUND};
}
else {
return \@asns, undef, q{}, q{EMPTY_ASN_SET};
}
} ## end foreach my $db_source ( @
return;
}
sub get {
my ( $class, $ip ) = @_;
my ( $asnref, $prefix, $raw, $ret_code ) = $class->get_with_prefix( $ip );
if ( $asnref ) {
return @{$asnref};
}
else {
return;
}
}
1;
=head1 NAME
Zonemaster::Engine::ASNLookup - do lookups of ASNs for IP addresses
=head1 SYNOPSIS
my ( $asnref, $prefix, $raw, $ret_code ) = Zonemaster::Engine::ASNLookup->get_with_prefix( '8.8.4.4' );
my $asnref = Zonemaster::Engine::ASNLookup->get( '192.168.0.1' );
=head1 FUNCTION
=over
=item get($addr)
As L<get_with_prefix()>, except it returns only the list of AS numbers
for the address, if any.
=item get_with_prefix($addr)
Takes a string (or a L<Net::IP::XS> object) with a single IP address, and
does a lookup in either: a) Cymru-style DNS zone or b) RIPE whois server,
depending on L<Zonemaster::Engine::Profile> setting "asn_db{style}".
Returns a list of a reference to a list of AS numbers, a Net::IP::XS object
of the covering prefix for that AS, a string of the raw query, and a string
of the return code for that query.
=back
=cut
|
