| 1 |
|
| 2 |
=head1 NAME
|
| 3 |
|
| 4 |
Message::Util::HostPermit --- manakai: Simple host permission checker
|
| 5 |
|
| 6 |
=head1 DESCRIPTION
|
| 7 |
|
| 8 |
This module is part of manakai.
|
| 9 |
|
| 10 |
=cut
|
| 11 |
|
| 12 |
package Message::Util::HostPermit;
|
| 13 |
use strict;
|
| 14 |
our $VERSION = do{my @r=(q$Revision: 1.2 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
|
| 15 |
|
| 16 |
=head1 METHODS
|
| 17 |
|
| 18 |
=over 4
|
| 19 |
|
| 20 |
=item $err = Message::Util::HostPermit->new ()
|
| 21 |
|
| 22 |
Constructs new instance
|
| 23 |
|
| 24 |
=cut
|
| 25 |
|
| 26 |
sub new ($) {
|
| 27 |
my $class = shift;
|
| 28 |
my $self = bless {rule => []}, $class;
|
| 29 |
$self;
|
| 30 |
}
|
| 31 |
|
| 32 |
sub add_rule ($$) {
|
| 33 |
my ($self, $s) = @_;
|
| 34 |
for (split /[\x0D\x0A]+/, $s) {
|
| 35 |
s/\#.*$//g;
|
| 36 |
if (/^(Allow|Deny) (.+)$/) {
|
| 37 |
my $rule = {type => $1};
|
| 38 |
for (split /\s+/, $2) {
|
| 39 |
my ($name, $val) = split /=/, $_, 2;
|
| 40 |
$rule->{'-'.$name} = $val;
|
| 41 |
}
|
| 42 |
push @{$self->{rule}}, $rule;
|
| 43 |
}
|
| 44 |
}
|
| 45 |
}
|
| 46 |
|
| 47 |
sub check ($$;$) {
|
| 48 |
my ($self, $name, $port) = @_;
|
| 49 |
return 0 unless defined $name;
|
| 50 |
my $addr;
|
| 51 |
($name, undef, undef, undef, $addr) = gethostbyname ($name);
|
| 52 |
return 0 if !$name && !$addr;
|
| 53 |
for my $rule (@{$self->{rule}}) {
|
| 54 |
if ($rule->{-host}) {
|
| 55 |
if ($self->match_host ($rule->{-host}, $name)) {
|
| 56 |
if (!$rule->{-port} || ($rule->{-port} == $port)) {
|
| 57 |
return ($rule->{type} eq 'Allow') ? 1 : 0;
|
| 58 |
}
|
| 59 |
}
|
| 60 |
} elsif ($rule->{-ipv4}) {
|
| 61 |
if ($self->match_ipv4 ($rule->{-ipv4}, $addr)) {
|
| 62 |
if (!$rule->{-port} || ($rule->{-port} == $port)) {
|
| 63 |
return ($rule->{type} eq 'Allow') ? 1 : 0;
|
| 64 |
}
|
| 65 |
}
|
| 66 |
} elsif ($rule->{-ipv6}) {
|
| 67 |
if ($self->match_ipv6 ($rule->{-ipv6}, $addr)) {
|
| 68 |
if (!$rule->{-port} || ($rule->{-port} == $port)) {
|
| 69 |
return ($rule->{type} eq 'Allow') ? 1 : 0;
|
| 70 |
}
|
| 71 |
}
|
| 72 |
}
|
| 73 |
}
|
| 74 |
return 0;
|
| 75 |
}
|
| 76 |
|
| 77 |
sub match_host ($$$) {
|
| 78 |
my ($self, $pattern, $host) = @_;
|
| 79 |
if (index ($pattern, '*') > -1) {
|
| 80 |
my @host = reverse split /\./, $host;
|
| 81 |
my @pattern = reverse split /\./, $pattern;
|
| 82 |
return 0 if $#host < $#pattern;
|
| 83 |
for (0..$#pattern) {
|
| 84 |
if ($pattern[$_] eq '*') {
|
| 85 |
return 1;
|
| 86 |
} elsif ($host[$_] ne $pattern[$_]) {
|
| 87 |
return 0;
|
| 88 |
}
|
| 89 |
}
|
| 90 |
return 0;
|
| 91 |
} else {
|
| 92 |
return $pattern eq $host ? 1 : 0;
|
| 93 |
}
|
| 94 |
}
|
| 95 |
|
| 96 |
sub match_ipv4 ($$$) {
|
| 97 |
my ($self, $pattern, $addr) = @_;
|
| 98 |
if (length ($addr) != 4) {
|
| 99 |
$addr =~ /([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/ or return 0;
|
| 100 |
$addr = pack 'C4', $1, $2, $3, $4;
|
| 101 |
}
|
| 102 |
my $mask = pack 'C4', 255, 255, 255, 255;
|
| 103 |
if (length ($pattern) != 4) {
|
| 104 |
$pattern =~ m!([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)(?:/([0-9]+))?!
|
| 105 |
or return 0;
|
| 106 |
$pattern = pack 'C4', $1, $2, $3, $4;
|
| 107 |
my $m = $5;
|
| 108 |
if (defined $m) {
|
| 109 |
$m = $m > 32 ? 32 : $m + 0;
|
| 110 |
$mask = pack 'C4', (($m > 24) ? (255, 255, 255, (2**($m-24)-1) << (32-$m)) :
|
| 111 |
($m > 16) ? (255, 255, (2**($m-16)-1) << (24-$m), 0) :
|
| 112 |
($m > 8) ? (255, (2**($m-8)-1) << (16-$m), 0, 0) :
|
| 113 |
((2**$m-1) << (8-$m), 0, 0, 0));
|
| 114 |
}
|
| 115 |
$pattern &= $mask;
|
| 116 |
#printf '[%vd] %vd (%s) %vd (%vd) %d', $mask, $pattern, $_[1], ($addr & $mask), $addr, (($addr & $mask) eq $pattern);
|
| 117 |
}
|
| 118 |
return (($addr & $mask) eq $pattern) ? 1 : 0;
|
| 119 |
}
|
| 120 |
|
| 121 |
## TODO: IPv6 support
|
| 122 |
sub match_ipv6 {
|
| 123 |
return 0;
|
| 124 |
}
|
| 125 |
|
| 126 |
=head1 LICENSE
|
| 127 |
|
| 128 |
Copyright 2003 Wakaba <w@suika.fam.cx>
|
| 129 |
|
| 130 |
This program is free software; you can redistribute it and/or
|
| 131 |
modify it under the same terms as Perl itself.
|
| 132 |
|
| 133 |
=cut
|
| 134 |
|
| 135 |
1; # $Date: 2003/09/27 07:59:11 $
|
Parent Directory
| 
Revision Log