#!/usr/bin/perl
###############################################################################
# #
# IPFire.org - A linux based firewall #
# Copyright (C) 2013 #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see . #
# #
###############################################################################
# Author: Alexander Marx (amarx@ipfire.org) #
###############################################################################
# #
# This script converts old portforwarding rules from old Firewall #
# to the new one. This is a 3-step process. #
# STEP1: read old config and normalize settings #
# STEP2: create new rules from old ones #
# STEP3: check if rule already exists, when not, put it into #
# /var/ipfire/forward/nat #
###############################################################################
require '/var/ipfire/general-functions.pl';
my @values=();
my @built_rules=();
my %nat=();
my $portfwconfig = "${General::swroot}/portfw/config";
my $confignat = "${General::swroot}/forward/config";
my ($key,$flag,$prot,$ipfireport,$target,$targetport,$active,$alias,$source,$remark);
my ($key1,$flag1,$prot1,$ipfireport1,$target1,$targetport1,$active1,$alias1,$source1,$remark1);
my $count=0;
my $jump;
if(! -d "/var/log/converters"){ mkdir("/var/log/converters");}
open(FILE, $portfwconfig) or die 'Unable to open config file.';
my @current = ;
close(FILE);
open (LOG, ">/var/log/converters/portfw-convert.log") or die $!;
open(ALIAS, "${General::swroot}/ethernet/aliases") or die 'Unable to open aliases file.';
my @alias = ;
close(ALIAS);
&get_config;
&build_rules;
&write_rules;
sub get_config
{
print LOG "STEP 1: Get config from old portforward\n#########################################\n";
foreach my $line (@current){
if($jump eq '1'){
$jump='';
$count++;
next;
}
my $u=$count+1;
($key,$flag,$prot,$ipfireport,$target,$targetport,$active,$alias,$source,$remark) = split(",",$line);
($key1,$flag1,$prot1,$ipfireport1,$target1,$targetport1,$active1,$alias1,$source1,$remark1) = split(",",$current[$u]);
if ($flag1 eq '1'){
$source=$source1;
$jump='1';
}
my $now=localtime;
chomp($remark);
print LOG "$now processing-> KEY: $key FLAG: $flag PROT: $prot FIREPORT: $ipfireport TARGET: $target TGTPORT: $targetport ACTIVE: $active ALIAS: $alias SOURCE: $source REM: $remark Doublerule: $jump\n";
push (@values,$prot.",".$ipfireport.",".$target.",".$targetport.",".$active.",".$alias.",".$source.",".$remark);
$count++;
}
}
sub build_rules
{
print LOG "\nSTEP 2: Convert old portforwardrules in a useable format\n########################################################\n";
my $src;
my $src1;
my $ipfireip;
my $count=0;
my $stop;
#build rules for new firewall
foreach my $line (@values){
chomp ($line);
($prot,$ipfireport,$target,$targetport,$active,$alias,$source,$remark)=split(",",$line);
$count++;
#get sourcepart
if($source eq '0.0.0.0/0'){
$src = 'std_net_src';
$src1 = 'ALL';
}else{
$src = 'src_addr';
my ($a,$b) = split("/",$source);
$src1 = $a."/32";
}
#get ipfire ip
if($alias eq '0.0.0.0'){
$alias='ALL';
}else{
foreach my $ali (@alias){
my ($alias_ip,$alias_active,$alias_name) = split (",",$ali);
if($alias eq $alias_ip){
chomp($alias_name);
$alias=$alias_name;
}
}
}
$active = uc $active;
$prot = uc $prot;
chomp($remark);
push (@built_rules,"ACCEPT,FORWARDFW,$active,$src,$src1,tgt_addr,$target/32,ON,$prot,,TGT_PORT,$targetport,$remark,00:00,00:00,ON,$alias,$ipfireport,dnat");
my $now=localtime;
print LOG "$now Converted-> KEY: $count ACCEPT,FORWARDFW,$active,$src,$src1,tgt_addr,$target/32,ON,$prot,,TGT_PORT,$targetport,$remark,00:00,00:00,ON,$alias,$ipfireport,dnat\n";
}
}
sub write_rules
{
my $skip='';
my $id;
print LOG "\nSTEP 3: Create DNAT rules in new firewall\n#########################################\n";
&General::readhasharray($confignat,\%nat);
foreach my $line (@built_rules){
$skip='';
my ($action,$chain,$active,$src,$src1,$tgt,$tgt1,$use_prot,$prot,$dummy,$tgt_port,$tgt_port1,$remark,$from,$to,$use_port,$alias,$ipfireport,$dnat) = split (",",$line);
foreach my $key (sort keys %nat){
if ($line eq "$nat{$key}[0],$nat{$key}[1],$nat{$key}[2],$nat{$key}[3],$nat{$key}[4],$nat{$key}[5],$nat{$key}[6],$nat{$key}[11],$nat{$key}[12],$nat{$key}[13],$nat{$key}[14],$nat{$key}[15],$nat{$key}[16],$nat{$key}[26],$nat{$key}[27],$nat{$key}[28],$nat{$key}[29],$nat{$key}[30],$nat{$key}[31]"){
my $now=localtime;
print LOG "$now SKIP-> Rule $nat{$key}[0],$nat{$key}[1],$nat{$key}[2],$nat{$key}[3],$nat{$key}[4],$nat{$key}[5],$nat{$key}[6],$nat{$key}[11],$nat{$key}[12],$nat{$key}[13],$nat{$key}[14],$nat{$key}[15],$nat{$key}[16],$nat{$key}[26],$nat{$key}[27],$nat{$key}[28],$nat{$key}[29],$nat{$key}[30],$nat{$key}[31] ->EXISTS\n";
$skip='1';
}
}
if ($skip ne '1'){
$id = &General::findhasharraykey(\%nat);
$nat{$id}[0] = $action;
$nat{$id}[1] = $chain;
$nat{$id}[2] = $active;
$nat{$id}[3] = $src;
$nat{$id}[4] = $src1;
$nat{$id}[5] = $tgt;
$nat{$id}[6] = $tgt1;
$nat{$id}[11] = $use_prot;
$nat{$id}[12] = $prot;
$nat{$id}[13] = $dummy;
$nat{$id}[14] = $tgt_port;
$nat{$id}[15] = $tgt_port1;
$nat{$id}[16] = $remark;
$nat{$id}[26] = $from;
$nat{$id}[27] = $to;
$nat{$id}[28] = $use_port;
$nat{$id}[29] = $alias;
$nat{$id}[30] = $ipfireport;
$nat{$id}[31] = $dnat;
my $now=localtime;
print LOG "$now NEW RULE-> Rule $nat{$id}[0],$nat{$id}[1],$nat{$id}[2],$nat{$id}[3],$nat{$id}[4],$nat{$id}[5],$nat{$id}[6],$nat{$id}[11],$nat{$id}[12],$nat{$id}[13],$nat{$id}[14],$nat{$id}[15],$nat{$id}[16],$nat{$id}[26],$nat{$id}[27],$nat{$id}[28],$nat{$id}[29],$nat{$id}[30],$nat{$id}[31]\n";
}
}
&General::writehasharray($confignat,\%nat);
}
close (LOG);