config/forwardfw/rules.pl

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2012                                                                                                              #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21 #                                                                                                                                                         #
  22 # Hi folks! I hope this code is useful for all. I needed something to handle  #
  23 # my VPN Connections in a comfortable way.                                                                #
  24 # This script builds firewallrules from the webinterface                      #
  25 ###############################################################################
  26
  27
  28 use strict;
  29 no warnings 'uninitialized';
  30
  31 # enable only the following on debugging purpose
  32 #use warnings;
  33 #use CGI::Carp 'fatalsToBrowser';
  34
  35 my %fwdfwsettings=();
  36 my %defaultNetworks=();
  37 my %configfwdfw=();
  38 my %color=();
  39 my %icmptypes=();
  40 my %ovpnSettings=();
  41 my %customgrp=();
  42 our %sourcehash=();
  43 our %targethash=();
  44 my @timeframe=();
  45 my %configinputfw=();
  46 my %aliases=();
  47 my @DPROT=();
  48 require '/var/ipfire/general-functions.pl';
  49 require "${General::swroot}/lang.pl";
  50 require "${General::swroot}/forward/bin/firewall-lib.pl";
  51
  52 my $configfwdfw         = "${General::swroot}/forward/config";
  53 my $configinput     = "${General::swroot}/forward/input";
  54 my $configgrp           = "${General::swroot}/fwhosts/customgroups";
  55 my $errormessage='';
  56 my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
  57 my $CHAIN="FORWARDFW";
  58
  59
  60 &General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
  61 &General::readhasharray($configfwdfw, \%configfwdfw);
  62 &General::readhasharray($configinput, \%configinputfw);
  63 &General::readhasharray($configgrp, \%customgrp);
  64 &General::get_aliases(\%aliases);
  65
  66 ################################
  67 #    DEBUG/TEST                #
  68 ################################
  69 my $MODE=0;     # 0 - normal operation
  70                                 # 1 - print configline and rules to console
  71                                 #
  72 ################################
  73 my $param=shift;
  74
  75 if($param eq 'flush'){
  76         if ($MODE eq '1'){
  77                 print " Flushing chains...\n";
  78         }
  79         &flush;
  80 }else{
  81         if ($MODE eq '1'){
  82                 print " Flushing chains...\n";
  83         }
  84         &flush;
  85         if ($MODE eq '1'){
  86                 print " Preparing rules...\n";
  87         }
  88         &preparerules;
  89         if($MODE eq '0'){
  90                 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
  91                         system ("iptables -A $CHAIN -j DROP");
  92                 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
  93                         system ("iptables -A $CHAIN -j ACCEPT");
  94                 }
  95         }
  96 }
  97
  98 sub flush
  99 {
 100         system ("iptables -F FORWARDFW");
 101         system ("iptables -F INPUTFW");
 102 }
 103 sub preparerules
 104 {
 105         if (! -z  "${General::swroot}/forward/config"){
 106                 &buildrules(\%configfwdfw);
 107         }
 108         if (! -z  "${General::swroot}/forward/input"){
 109                 &buildrules(\%configinputfw);
 110         }
 111 }
 112 sub buildrules
 113 {
 114
 115         my $hash=shift;
 116
 117         foreach my $key (sort keys %$hash){
 118                 if($$hash{$key}[2] eq 'ON'){
 119                         #get source ip's
 120                         if ($$hash{$key}[3] eq 'cust_grp_src'){
 121                                 foreach my $grp (sort keys %customgrp){
 122                                                 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
 123                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
 124                                         }
 125                                 }
 126                         }else{
 127                                 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
 128                         }
 129                         #get target ip's
 130                         if ($$hash{$key}[5] eq 'cust_grp_tgt'){
 131                                 foreach my $grp (sort keys %customgrp){
 132                                         if($customgrp{$grp}[0] eq $$hash{$key}[6]){
 133                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
 134                                         }
 135                                 }
 136                         }elsif($$hash{$key}[5] eq 'ipfire'){
 137
 138                                 if($$hash{$key}[6] eq 'Default IP'){
 139                                         open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
 140                                         $targethash{$key}[0]= <FILE>;
 141                                         close(FILE);
 142                                 }else{
 143                                         foreach my $alias (sort keys %aliases){
 144                                                 if ($$hash{$key}[6] eq $alias){
 145                                                         $targethash{$key}[0]=$aliases{$alias}{'IPT'};
 146                                                 }
 147                                         }
 148                                 }
 149                         }else{
 150                                 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
 151                         }
 152                         ##get source prot and port
 153                         $SRC_TGT='SRC';
 154                         $SPROT = &get_prot($hash,$key);
 155                         $SPORT = &get_port($hash,$key);
 156                         $SRC_TGT='';
 157
 158                         ##get target prot and port
 159                         $DPROT=&get_prot($hash,$key);
 160
 161                         if ($DPROT eq ''){$DPROT=' ';}
 162                         @DPROT=split(",",$DPROT);
 163
 164
 165                         #get time if defined
 166                         if($$hash{$key}[18] eq 'ON'){
 167                                 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
 168                                 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
 169                                 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
 170                                 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
 171                                 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
 172                                 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
 173                                 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
 174                                 $TIME=join(",",@timeframe);
 175                                 $TIMEFROM="--timestart $$hash{$key}[26] ";
 176                                 $TIMETILL="--timestop $$hash{$key}[27] ";
 177                                 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
 178                         }
 179
 180                         if ($MODE eq '1'){
 181                                 print "NR:$key ";
 182                                 foreach my $i (0 .. $#{$$hash{$key}}){
 183                                         print "$i: $$hash{$key}[$i]  ";
 184                                 }
 185                                 print "\n";
 186                                 print"##################################\n";
 187                                 #print rules to console
 188
 189                                 foreach my $DPROT (@DPROT){
 190                                         $DPORT = &get_port($hash,$key,$DPROT);
 191                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 192                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 193                                         foreach my $a (sort keys %sourcehash){
 194                                                 foreach my $b (sort keys %targethash){
 195                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
 196                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 197                                                                         if ($$hash{$key}[17] eq 'ON'){
 198                                                                                 print "iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
 199                                                                         }
 200                                                                         print "iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
 201                                                                 }
 202                                                         }
 203                                                 }
 204                                         }
 205                                         print"\n";
 206                                 }
 207
 208                         }elsif($MODE eq '0'){
 209                                 foreach my $DPROT (@DPROT){
 210                                         $DPORT = &get_port($hash,$key,$DPROT);
 211                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 212                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 213                                         foreach my $a (sort keys %sourcehash){
 214                                                 foreach my $b (sort keys %targethash){
 215                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
 216                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 217                                                                         if ($$hash{$key}[17] eq 'ON'){
 218                                                                                 system ("iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
 219                                                                         }
 220                                                                         system ("iptables -A $$hash{$key}[1] $PROT -s $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
 221                                                                 }
 222                                                         }
 223                                                 }
 224                                         }
 225                                         print"\n";
 226                                 }
 227                         }
 228                 }
 229                 %sourcehash=();
 230                 %targethash=();
 231                 undef $TIME;
 232                 undef $TIMEFROM;
 233                 undef $TIMETILL;
 234         }
 235 }
 236 sub get_address
 237 {
 238         my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
 239         my $base2=shift;
 240         my $type=shift; #src or tgt
 241         my $hash;
 242         if ($type eq 'src'){
 243                 $hash=\%sourcehash;
 244         }else{
 245                 $hash=\%targethash;
 246         }
 247         my $key = &General::findhasharraykey($hash);
 248         if($base eq 'src_addr' || $base eq 'tgt_addr' ){
 249                 $$hash{$key}[0] = $base2;
 250         }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
 251                 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
 252         }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
 253                 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
 254         }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
 255                 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
 256         }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
 257                 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
 258         }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
 259                 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
 260         }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
 261                 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
 262         }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
 263                 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
 264         }
 265 }
 266 sub get_prot
 267 {
 268         my $hash=shift;
 269         my $key=shift;
 270         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 271                 if ($$hash{$key}[10] ne ''){
 272                         return"$$hash{$key}[8]";
 273                 }elsif($$hash{$key}[9] ne ''){
 274                         return"$$hash{$key}[8]";
 275                 }else{
 276                         return "$$hash{$key}[8]";
 277                 }
 278         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 279                 if ($$hash{$key}[14] eq 'TGT_PORT'){
 280                         if ($$hash{$key}[15] ne ''){
 281                                 return "$$hash{$key}[12]";
 282                         }elsif($$hash{$key}[13] ne ''){
 283                                 return "$$hash{$key}[12]";
 284                         }else{
 285                                 return "$$hash{$key}[12]";
 286                         }
 287                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 288                         return &fwlib::get_srv_prot($$hash{$key}[15]);
 289
 290                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 291                         return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
 292                 }
 293         }
 294 }
 295 sub get_port
 296 {
 297         my $hash=shift;
 298         my $key=shift;
 299         my $prot=shift;
 300         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 301                 if ($$hash{$key}[10] ne ''){
 302                         return "--sport $$hash{$key}[10] ";
 303                 }elsif($$hash{$key}[9] ne ''){
 304                         return "--icmp-type $$hash{$key}[9] ";
 305                 }
 306         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 307
 308                 if($$hash{$key}[14] eq 'TGT_PORT'){
 309                         if ($$hash{$key}[15] ne ''){
 310                                 return "--dport $$hash{$key}[15] ";
 311                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
 312                                 return "--icmp-type $$hash{$key}[13] ";
 313                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
 314                                 return;
 315                         }
 316                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 317                         if ($prot ne 'ICMP'){
 318                                 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
 319                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
 320                                 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
 321                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
 322                                 return;
 323                         }
 324                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 325                         if      ($prot ne 'ICMP'){
 326                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 327                         }
 328                         elsif($prot eq 'ICMP'){
 329                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 330                         }
 331
 332
 333                 }
 334         }
 335 }