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 ($fwdfwsettings{'POLICY'} eq 'MODE1'){
  91                         system ("/usr/sbin/firewall-forward-policy");
  92                 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
  93                         system ("/usr/sbin/firewall-forward-policy");
  94                 }elsif($fwdfwsettings{'POLICY'} eq 'MODE0' || $fwdfwsettings{'POLICY'} eq 'MODE2'){
  95                         system ("/usr/sbin/firewall-forward-policy");
  96                         system ("iptables -A $CHAIN -m state --state NEW -j ACCEPT");
  97                 }
  98         }
  99 }
 100
 101 sub flush
 102 {
 103         system ("iptables -F FORWARDFW");
 104         system ("iptables -F INPUTFW");
 105 }
 106 sub preparerules
 107 {
 108         if (! -z  "${General::swroot}/forward/config"){
 109                 &buildrules(\%configfwdfw);
 110         }
 111         if (! -z  "${General::swroot}/forward/input"){
 112                 &buildrules(\%configinputfw);
 113         }
 114 }
 115 sub buildrules
 116 {
 117         my $hash=shift;
 118         my $STAG;
 119         foreach my $key (sort keys %$hash){
 120                 $STAG='';
 121                 if($$hash{$key}[2] eq 'ON'){
 122                         #get source ip's
 123                         if ($$hash{$key}[3] eq 'cust_grp_src'){
 124                                 foreach my $grp (sort keys %customgrp){
 125                                                 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
 126                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
 127                                         }
 128                                 }
 129                         }else{
 130                                 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
 131                         }
 132                         #get target ip's
 133                         if ($$hash{$key}[5] eq 'cust_grp_tgt'){
 134                                 foreach my $grp (sort keys %customgrp){
 135                                         if($customgrp{$grp}[0] eq $$hash{$key}[6]){
 136                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
 137                                         }
 138                                 }
 139                         }elsif($$hash{$key}[5] eq 'ipfire'){
 140
 141                                 if($$hash{$key}[6] eq 'Default IP'){
 142                                         open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
 143                                         $targethash{$key}[0]= <FILE>;
 144                                         close(FILE);
 145                                 }else{
 146                                         foreach my $alias (sort keys %aliases){
 147                                                 if ($$hash{$key}[6] eq $alias){
 148                                                         $targethash{$key}[0]=$aliases{$alias}{'IPT'};
 149                                                 }
 150                                         }
 151                                 }
 152                         }else{
 153                                 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
 154                         }
 155                         ##get source prot and port
 156                         $SRC_TGT='SRC';
 157                         $SPROT = &get_prot($hash,$key);
 158                         $SPORT = &get_port($hash,$key);
 159                         $SRC_TGT='';
 160
 161                         ##get target prot and port
 162                         $DPROT=&get_prot($hash,$key);
 163
 164                         if ($DPROT eq ''){$DPROT=' ';}
 165                         @DPROT=split(",",$DPROT);
 166
 167
 168                         #get time if defined
 169                         if($$hash{$key}[18] eq 'ON'){
 170                                 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
 171                                 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
 172                                 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
 173                                 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
 174                                 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
 175                                 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
 176                                 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
 177                                 $TIME=join(",",@timeframe);
 178                                 $TIMEFROM="--timestart $$hash{$key}[26] ";
 179                                 $TIMETILL="--timestop $$hash{$key}[27] ";
 180                                 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
 181                         }
 182
 183                         if ($MODE eq '1'){
 184                                 print "NR:$key ";
 185                                 foreach my $i (0 .. $#{$$hash{$key}}){
 186                                         print "$i: $$hash{$key}[$i]  ";
 187                                 }
 188                                 print "\n";
 189                                 print"##################################\n";
 190                                 #print rules to console
 191
 192                                 foreach my $DPROT (@DPROT){
 193                                         $DPORT = &get_port($hash,$key,$DPROT);
 194                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 195                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 196                                         foreach my $a (sort keys %sourcehash){
 197                                                 foreach my $b (sort keys %targethash){
 198                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
 199                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 200                                                                         if(substr($sourcehash{$a}[0], 4, 6) eq 'mac'){ $STAG="-s";}
 201                                                                         if ($$hash{$key}[17] eq 'ON'){
 202                                                                                 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
 203                                                                         }
 204                                                                         print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
 205                                                                 }
 206                                                         }
 207                                                 }
 208                                         }
 209                                         print"\n";
 210                                 }
 211                         }elsif($MODE eq '0'){
 212                                 foreach my $DPROT (@DPROT){
 213                                         $DPORT = &get_port($hash,$key,$DPROT);
 214                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 215                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 216                                         foreach my $a (sort keys %sourcehash){
 217                                                 foreach my $b (sort keys %targethash){
 218                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none'){
 219                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 220                                                                         if(substr($sourcehash{$a}[0], 4, 6) eq 'mac'){ $STAG="-s";}
 221                                                                         if ($$hash{$key}[17] eq 'ON'){
 222                                                                                 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
 223                                                                         }
 224                                                                         system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
 225                                                                 }
 226                                                         }
 227                                                 }
 228                                         }
 229                                         print"\n";
 230                                 }
 231                         }
 232                 }
 233                 %sourcehash=();
 234                 %targethash=();
 235                 undef $TIME;
 236                 undef $TIMEFROM;
 237                 undef $TIMETILL;
 238         }
 239 }
 240 sub get_address
 241 {
 242         my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
 243         my $base2=shift;
 244         my $type=shift; #src or tgt
 245         my $hash;
 246         if ($type eq 'src'){
 247                 $hash=\%sourcehash;
 248         }else{
 249                 $hash=\%targethash;
 250         }
 251         my $key = &General::findhasharraykey($hash);
 252         if($base eq 'src_addr' || $base eq 'tgt_addr' ){
 253                 if (&General::validmac($base2)){
 254                         $$hash{$key}[0] = "-m mac --mac-source $base2";
 255                 }else{
 256                         $$hash{$key}[0] = $base2;
 257                 }
 258         }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
 259                 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
 260         }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
 261                 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
 262         }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
 263                 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
 264         }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
 265                 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
 266         }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
 267                 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
 268         }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
 269                 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
 270         }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
 271                 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
 272         }
 273 }
 274 sub get_prot
 275 {
 276         my $hash=shift;
 277         my $key=shift;
 278         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 279                 if ($$hash{$key}[10] ne ''){
 280                         return"$$hash{$key}[8]";
 281                 }elsif($$hash{$key}[9] ne ''){
 282                         return"$$hash{$key}[8]";
 283                 }else{
 284                         return "$$hash{$key}[8]";
 285                 }
 286         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 287                 if ($$hash{$key}[14] eq 'TGT_PORT'){
 288                         if ($$hash{$key}[15] ne ''){
 289                                 return "$$hash{$key}[12]";
 290                         }elsif($$hash{$key}[13] ne ''){
 291                                 return "$$hash{$key}[12]";
 292                         }else{
 293                                 return "$$hash{$key}[12]";
 294                         }
 295                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 296                         return &fwlib::get_srv_prot($$hash{$key}[15]);
 297
 298                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 299                         return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
 300                 }
 301         }
 302 }
 303 sub get_port
 304 {
 305         my $hash=shift;
 306         my $key=shift;
 307         my $prot=shift;
 308         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 309                 if ($$hash{$key}[10] ne ''){
 310                         return "--sport $$hash{$key}[10] ";
 311                 }elsif($$hash{$key}[9] ne '' && $$hash{$key}[9] ne 'All ICMP-Types'){
 312                         return "--icmp-type $$hash{$key}[9] ";
 313                 }elsif($$hash{$key}[9] eq 'All ICMP-Types'){
 314                         return;
 315                 }
 316         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 317
 318                 if($$hash{$key}[14] eq 'TGT_PORT'){
 319                         if ($$hash{$key}[15] ne ''){
 320                                 return "--dport $$hash{$key}[15] ";
 321                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
 322                                 return "--icmp-type $$hash{$key}[13] ";
 323                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
 324                                 return;
 325                         }
 326                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 327                         if ($prot ne 'ICMP'){
 328                                 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
 329                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
 330                                 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
 331                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
 332                                 return;
 333                         }
 334                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 335                         if      ($prot ne 'ICMP'){
 336                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 337                         }
 338                         elsif($prot eq 'ICMP'){
 339                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 340                         }
 341
 342
 343                 }
 344         }
 345 }