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103 lines
2.7 KiB
Perl
103 lines
2.7 KiB
Perl
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#
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# Shorewall-6 4.1 -- /usr/share/shorewall6/Shorewall6/IPAddrs.pm
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#
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# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
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#
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# (c) 2007 - Tom Eastep (teastep@shorewall.net)
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#
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# Complete documentation is available at http://shorewall.net
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# This module provides interfaces for dealing with IPv4 addresses.
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#
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package Shorewall::IPAddrs;
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require Exporter;
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use Shorewall::Config;
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use strict;
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our @ISA = qw(Exporter);
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our @EXPORT = qw( ALLIPv6
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validate_address
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validate_net
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validate_host
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validate_range
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ip_range_explicit
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allipv6
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);
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our @EXPORT_OK = qw( );
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our $VERSION = '4.03';
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#
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# Some IPv6 useful stuff
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#
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our @allipv6 = ( '::/0' );
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sub allipv6() {
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@allipv6
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}
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use constant { ALLIPv6 => '::/0' };
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sub valid_address( $ ) {
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my $address = $_[0];
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my @address = split /:/, $address;
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return 0 if @address > 8;
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return 0 if @address < 8 && ! $address =~ /::/;
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return 0 if $address =~ /:::/ || $address =~ /::.*::/;
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if ( $address =~ /^:/ ) {
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unless ( $address eq '::' ) {
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return 0 if $address =~ /:$/ || $address =~ /^:.*::/;
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}
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} elsif ( $address =~ /:$/ ) {
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return 0 if $address =~ /::.*:$/;
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}
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for my $a ( @address ) {
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return 0 unless $a eq '' || ( $a =~ /^[a-fA-f\d]+$/ && oct "0x$a" < 65536 );
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}
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1;
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}
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sub validate_address( $ ) {
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my $addr = $_[0];
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unless ( valid_address $addr ) {
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fatal_error "Unknown Host ($addr)" unless defined gethostbyname $addr;
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}
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}
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sub validate_net( $ ) {
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my ($net, $vlsm, $rest) = split( '/', $_[0], 3 );
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fatal_error "An ipset name ($net) is not allowed in this context" if substr( $net, 0, 1 ) eq '+';
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if ( defined $vlsm ) {
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fatal_error "Invalid VLSM ($vlsm)" unless $vlsm =~ /^\d+$/ && $vlsm <= 64;
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fatal_error "Invalid Network address ($_[0])" if defined $rest;
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fatal_error "Invalid IPv6 address ($net)" unless valid_address $net;
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} else {
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fatal_error "Invalid Network address ($_[0])" if $_[0] =~ '/' || ! defined $net;
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validate_address $net;
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}
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}
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1;
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