#!/usr/bin/perl

###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2013 Alexander Marx <amarx@ipfire.org>                        #
#                                                                             #
# 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 <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################
#                                                                             #
# This script converts old dmz holes rules from old firewall                  #
# to the new one. This is a 2-step process.                                   #
# STEP1: read old config and normalize settings                               #
# STEP2: check valid ip and save valid rules to new firewall                  #
#                                                                             #
###############################################################################
my @current=();
my @alias=();
my %configdmz=();
my %ifaces=();
my %configfwdfw=();
require '/var/ipfire/general-functions.pl';
my $dmzconfig 	  = "${General::swroot}/dmzholes/config";
my $fwdfwconfig   = "${General::swroot}/firewall/config";
my $ifacesettings = "${General::swroot}/ethernet/settings";
my $field0	= 'ACCEPT';
my $field1	= 'FORWARDFW';
my $field2	= ''; #ON or emtpy
my $field3	= ''; #std_net_src or src_addr
my $field4	= ''; #ALL or IP-Address with /32
my $field5	= ''; #std_net_tgt or tgt_addr
my $field6	= ''; #IP or network name
my $field11	= 'ON'; #use target port 
my $field12	= ''; #TCP or UDP
my $field13	= 'All ICMP-Types';
my $field14	= 'TGT_PORT';
my $field15	= ''; #Port Number
my $field16	= ''; #remark
my $field26	= '00:00';
my $field27	= '00:00';
my $field28 = '';
my $field29 = 'ALL';
my $field30 = '';
my $field31 = 'dnat';

if (! -e "$dmzconfig") {
	print "DMZ config file not found. Exiting!\n";
	exit(1);
}

if (! -s "$dmzconfig") {
	print "Empty DMZ configuration file. Nothing to do. Exiting...\n";
	exit(0);
}

open(FILE, $dmzconfig) or die 'Unable to open config file.';
my @current = <FILE>;
close(FILE);
#open LOGFILE
open (LOG, ">/var/log/converters/dmz-convert.log") or die $!;
&General::readhash($ifacesettings, \%ifaces);
&General::readhasharray($fwdfwconfig,\%configfwdfw);
&process_rules;
sub process_rules{
	foreach my $line (@current){
		my $now=localtime;
		#get values from old configfile
		my ($a,$b,$c,$d,$e,$f,$g,$h) = split (",",$line);
		$h =~ s/\s*\n//gi;
		print LOG "$now Processing A: $a   B: $b   C: $c   D: $d   E: $e   F: $f   G: $g   H: $h\n";
		#Now convert values and check ip addresses
		$a=uc($a);
		$e=uc($e);
		$field2=$e if($e eq 'ON');
		#SOURCE IP-check
		$b=&check_ip($b);
		if (&General::validipandmask($b)){
			#When ip valid, check if we have a network
			my ($ip,$subnet) = split ("/",$b);
			if ($f eq 'orange' && $ip eq $ifaces{'ORANGE_NETADDRESS'}){
				$field3='std_net_src';
				$field4='ORANGE';
			}elsif($f eq 'blue' && $ip eq $ifaces{'BLUE_NETADDRESS'}){
				$field3='std_net_src';
				$field4='BLUE';
			}elsif($f eq 'orange' && &General::IpInSubnet($ip,$ifaces{'ORANGE_NETADDRESS'},$ifaces{'ORANGE_NETMASK'})){
				$field3='src_addr';
				$field4=$b;
			}elsif($f eq 'blue' && &General::IpInSubnet($ip,$ifaces{'BLUE_NETADDRESS'},$ifaces{'BLUE_NETMASK'})){
				$field3='src_addr';
				$field4=$b;
			}else{
				print LOG "$now ->NOT Converted, source ip $b not part of source network $f \n\n";
				next;
			}
		}else{
			print LOG "$now -> SOURCE IP INVALID. \n\n";
			next;
		}
		#TARGET IP-check
		$c=&check_ip($c);
		if (&General::validipandmask($c)){
			my $now=localtime;
			#When ip valid, check if we have a network
			my ($ip,$subnet) = split ("/",$c);
			if ($g eq 'green' && $ip eq $ifaces{'GREEN_NETADDRESS'}){
				$field5='std_net_tgt';
				$field6='GREEN';
			}elsif($g eq 'blue' && $ip eq $ifaces{'BLUE_NETADDRESS'}){
				$field5='std_net_tgt';
				$field6='BLUE';
			}elsif($g eq 'green' && &General::IpInSubnet($ip,$ifaces{'GREEN_NETADDRESS'},$ifaces{'GREEN_NETMASK'})){
				$field5='tgt_addr';
				$field6=$c;
			}elsif($g eq 'blue' && &General::IpInSubnet($ip,$ifaces{'BLUE_NETADDRESS'},$ifaces{'BLUE_NETMASK'})){
				$field5='tgt_addr';
				$field6=$c;
			}else{
				print LOG "$now ->NOT Converted, target ip $c not part of target network $g \n\n";
				next;
			}
		}else{
			print LOG "$now -> TARGET IP INVALID. \n\n";
			next;
		}
		$field12=$a;
		#convert portrange
		$d =~ tr/-/:/;
		$field15=$d;
		$field16=$h;
		my $key = &General::findhasharraykey (\%configfwdfw);
		foreach my $i (0 .. 27) { $configfwdfw{$key}[$i] = "";}
		$configfwdfw{$key}[0] = $field0;
		$configfwdfw{$key}[1] = $field1;
		$configfwdfw{$key}[2] = $field2;
		$configfwdfw{$key}[3] = $field3;
		$configfwdfw{$key}[4] = $field4;
		$configfwdfw{$key}[5] = $field5;
		$configfwdfw{$key}[6] = $field6;
		$configfwdfw{$key}[7] = '';
		$configfwdfw{$key}[8] = $field12;
		$configfwdfw{$key}[9] = '';
		$configfwdfw{$key}[10] = '';
		$configfwdfw{$key}[11] = $field11;
		$configfwdfw{$key}[12] = '';
		$configfwdfw{$key}[13] = '';
		$configfwdfw{$key}[14] = $field14;
		$configfwdfw{$key}[15] = $field15;
		$configfwdfw{$key}[16] = $field16;
		$configfwdfw{$key}[17] = '';
		$configfwdfw{$key}[18] = '';
		$configfwdfw{$key}[19] = '';
		$configfwdfw{$key}[20] = '';
		$configfwdfw{$key}[21] = '';
		$configfwdfw{$key}[22] = '';
		$configfwdfw{$key}[23] = '';
		$configfwdfw{$key}[24] = '';
		$configfwdfw{$key}[25] = '';
		$configfwdfw{$key}[26] = $field26;
		$configfwdfw{$key}[27] = $field27;
		$configfwdfw{$key}[28] = $field28;
		$configfwdfw{$key}[29] = $field29;
		$configfwdfw{$key}[30] = $field30;
		$configfwdfw{$key}[31] = $field31;
		print LOG "$Now -> Converted to $field0,$field1,$field2,$field3,$field4,$field5,$field6,,$field12,,,$field11,,,$field14,$field15,$field16,,,,,,,,,,$field26,$field27,$field28,$field29,$field30,$field31\n";
	}
	&General::writehasharray($fwdfwconfig,\%configfwdfw);
close (LOG);
}

sub check_ip
{
	my $adr=shift;
	my $a;
	#ip with subnet in decimal
	if($adr =~ m/^(\d\d?\d?).(\d\d?\d?).(\d\d?\d?).(\d\d?\d?)\/(\d{1,2})$/){
		$adr=int($1).".".int($2).".".int($3).".".int($4);
		my $b = &General::iporsubtodec($5);
		$a=$adr."/".$b;
	}elsif($adr =~ /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/){
		$adr=int($1).".".int($2).".".int($3).".".int($4);
		if(&General::validip($adr)){
			$a=$adr."/32";
		}
	}
	if(&General::validipandmask($adr)){
		$a=&General::iporsubtodec($adr);
	}
	return $a;
}