/usr/share/perl5/Mail/SpamAssassin/NetSet.pm is in spamassassin 3.3.2-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | # Mail::SpamAssassin::NetSet - object to manipulate CIDR net IP addrs
# <@LICENSE>
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# </@LICENSE>
package Mail::SpamAssassin::NetSet;
use strict;
use warnings;
use bytes;
use re 'taint';
use NetAddr::IP 4.000;
use Mail::SpamAssassin::Util;
use Mail::SpamAssassin::Logger;
use vars qw{
@ISA $TESTCODE $NUMTESTS
};
@ISA = qw();
###########################################################################
sub new {
my $class = shift;
$class = ref($class) || $class;
my $self = { };
bless $self, $class;
$self;
}
###########################################################################
sub add_cidr {
my ($self, @nets) = @_;
local ($_);
$self->{nets} ||= [ ];
my $numadded = 0;
foreach my $cidr (@nets) {
my $exclude = ($cidr =~ s/^\s*!//) ? 1 : 0;
my $is_ip4 = 0;
if ($cidr =~ /^\d+[\.\/]/) {
if ($cidr =~ /^(\d+)\.(\d+)\.(\d+)\.$/) { $cidr = "$1.$2.$3.0/24"; }
elsif ($cidr =~ /^(\d+)\.(\d+)\.$/) { $cidr = "$1.$2.0.0/16"; }
elsif ($cidr =~ /^(\d+)\.$/) { $cidr = "$1.0.0.0/8"; }
$is_ip4 = 1;
}
my $ip = NetAddr::IP->new($cidr);
if (!defined $ip) {
warn "netset: illegal network address given: '$cidr'\n";
next;
}
# if this is an IPv4 address, create an IPv6 representation, too
my ($ip4, $ip6);
if ($is_ip4) {
$ip4 = $ip;
$ip6 = $self->_convert_ipv4_cidr_to_ipv6($cidr);
} else {
$ip6 = $ip;
}
# bug 5931: this is O(n^2). bad if there are lots of nets. There are good
# reasons to keep it for linting purposes, though, so don't start skipping
# it until we have over 200 nets in our list
if (scalar @{$self->{nets}} < 200) {
next if ($self->is_net_declared($ip4, $ip6, $exclude, 0));
}
# note: it appears a NetAddr::IP object takes up about 279 bytes
push @{$self->{nets}}, {
exclude => $exclude,
ip4 => $ip4,
ip6 => $ip6,
as_string => $cidr
};
$numadded++;
}
$numadded;
}
sub get_num_nets {
my ($self) = @_;
if (!exists $self->{nets}) { return 0; }
return scalar @{$self->{nets}};
}
sub _convert_ipv4_cidr_to_ipv6 {
my ($self, $cidr) = @_;
# only do this for IPv4 addresses
return undef unless ($cidr =~ /^\d+[.\/]/);
if ($cidr !~ /\//) { # no mask
return NetAddr::IP->new6("::ffff:".$cidr);
}
# else we have a CIDR mask specified. use new6() to do this
#
my $ip6 = ""+(NetAddr::IP->new6($cidr));
# 127.0.0.1 -> 0:0:0:0:0:0:7F00:0001/128
# 127/8 -> 0:0:0:0:0:0:7F00:0/104
# now, move that from 0:0:0:0:0:0: space to 0:0:0:0:0:ffff: space
if (!defined $ip6 || $ip6 !~ /^0:0:0:0:0:0:(.*)$/) {
warn "oops! unparseable IPv6 address for $cidr: $ip6";
return undef;
}
return NetAddr::IP->new6("::ffff:$1");
}
sub _nets_contains_network {
my ($self, $net4, $net6, $exclude, $quiet, $netname, $declared) = @_;
return 0 unless (defined $self->{nets});
foreach my $net (@{$self->{nets}}) {
# check to see if the new network is contained by the old network
my $in4 = defined $net4 && defined $net->{ip4} && $net->{ip4}->contains($net4);
my $in6 = defined $net6 && defined $net->{ip6} && $net->{ip6}->contains($net6);
if ($in4 || $in6) {
warn "netset: cannot " . ($exclude ? "exclude" : "include")
. " $netname as it has already been "
. ($net->{exclude} ? "excluded" : "included") . "\n" unless $quiet;
# a network that matches an excluded network isn't contained by "nets"
# return 0 if we're not just looking to see if the network was declared
return 0 if (!$declared && $net->{exclude});
return 1;
}
}
return 0;
}
sub is_net_declared {
my ($self, $net4, $net6, $exclude, $quiet) = @_;
return $self->_nets_contains_network($net4, $net6, $exclude,
$quiet, $net4 || $net6, 1);
}
sub contains_ip {
my ($self, $ip) = @_;
if (!defined $self->{nets}) { return 0; }
my ($ip4, $ip6);
if ($ip =~ /^\d+\./) {
$ip4 = NetAddr::IP->new($ip);
$ip6 = $self->_convert_ipv4_cidr_to_ipv6($ip);
} else {
$ip6 = NetAddr::IP->new($ip);
}
foreach my $net (@{$self->{nets}}) {
return !$net->{exclude} if
((defined $ip4 && defined $net->{ip4} && $net->{ip4}->contains($ip4))
|| (defined $ip6 && defined $net->{ip6} && $net->{ip6}->contains($ip6)));
}
return 0;
}
sub contains_net {
my ($self, $net) = @_;
my $exclude = $net->{exclude};
my $net4 = $net->{ip4};
my $net6 = $net->{ip6};
return $self->_nets_contains_network($net4, $net6, $exclude, 1, "", 0);
}
sub clone {
my ($self) = @_;
my $dup = Mail::SpamAssassin::NetSet->new();
if (defined $self->{nets}) {
@{$dup->{nets}} = @{$self->{nets}};
}
return $dup;
}
###########################################################################
1;
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