html/cgi-bin/guardian.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2016  IPFire Team  <info@ipfire.org>                          #
   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 use strict;
  23 use Locale::Codes::Country;
  24 use Guardian::Socket;
  25
  26 # enable only the following on debugging purpose
  27 #use warnings;
  28 #use CGI::Carp 'fatalsToBrowser';
  29
  30 require '/var/ipfire/general-functions.pl';
  31 require "${General::swroot}/lang.pl";
  32 require "${General::swroot}/header.pl";
  33
  34 #workaround to suppress a warning when a variable is used only once
  35 my @dummy = (
  36         ${Header::colourred},
  37         ${Header::colourgreen}
  38 );
  39
  40 undef (@dummy);
  41
  42 my $string=();
  43 my $memory=();
  44 my @memory=();
  45 my @pid=();
  46 my @guardian=();
  47
  48 # Path to the guardian.ignore file.
  49 my $ignorefile ='/var/ipfire/guardian/guardian.ignore';
  50
  51 # Hash which contains the supported modules and the
  52 # file locations on IPFire systems.
  53 my %module_file_locations = (
  54         "HTTPD" => "/var/log/httpd/error_log",
  55         "OWNCLOUD" => "/var/owncloud/data/owncloud.log",
  56         "SNORT" => "/var/log/snort.alert",
  57         "SSH" => "/var/log/messages",
  58 );
  59
  60 our %netsettings = ();
  61 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  62
  63 our %color = ();
  64 our %mainsettings = ();
  65 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  66 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  67
  68 # Pakfire meta file for owncloud.
  69 # (File exists when the addon is installed.)
  70 my $owncloud_meta = "/opt/pakfire/db/installed/meta-owncloud";
  71
  72 our %settings = ();
  73
  74 $settings{'ACTION'} = '';
  75
  76 $settings{'GUARDIAN_ENABLED'} = 'off';
  77 $settings{'GUARDIAN_MONITOR_SNORT'} = 'on';
  78 $settings{'GUARDIAN_MONITOR_SSH'} = 'on';
  79 $settings{'GUARDIAN_MONITOR_HTTPD'} = 'on';
  80 $settings{'GUARDIAN_MONITOR_OWNCLOUD'} = '';
  81 $settings{'GUARDIAN_LOG_FACILITY'} = 'syslog';
  82 $settings{'GUARDIAN_LOGLEVEL'} = 'info';
  83 $settings{'GUARDIAN_BLOCKCOUNT'} = '3';
  84 $settings{'GUARDIAN_BLOCKTIME'} = '86400';
  85 $settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
  86 $settings{'GUARDIAN_SNORT_PRIORITY_LEVEL'} = '3';
  87
  88 # Default settings for owncloud if installed.
  89 if ( -e "$owncloud_meta") {
  90         $settings{'GUARDIAN_MONITOR_OWNCLOUD'} = 'off';
  91 }
  92
  93 my $errormessage = '';
  94
  95 &Header::showhttpheaders();
  96
  97 # Get GUI values.
  98 &Header::getcgihash(\%settings);
  99
 100 # Check if guardian is running and grab some stats.
 101 &daemonstats();
 102 my $pid = $pid[0];
 103
 104 ## Perform input checks and save settings.
 105 #
 106 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
 107         # Check for valid blocktime.
 108         unless(($settings{'GUARDIAN_BLOCKTIME'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKTIME'} ne "0")) {
 109                         $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
 110         }
 111
 112         # Check if the bloccount is valid.
 113         unless(($settings{'GUARDIAN_BLOCKCOUNT'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKCOUNT'} ne "0")) {
 114                         $errormessage = "$Lang::tr{'guardian invalid blockcount'}";
 115         }
 116
 117         # Check Logfile.
 118         unless($settings{'GUARDIAN_LOGFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 119                 $errormessage = "$Lang::tr{'guardian invalid logfile'}";
 120         }
 121
 122         # Only continue if no error message has been set.
 123         if($errormessage eq '') {
 124                 # Write configuration settings to file.
 125                 &General::writehash("${General::swroot}/guardian/settings", \%settings);
 126
 127                 # Update configuration files.
 128                 &BuildConfiguration();
 129         }
 130
 131 ## Add a new entry to the ignore file.
 132 #
 133 } elsif ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 134
 135         # Check if any input has been performed.
 136         if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
 137
 138                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 139                 if ((!&General::validip($settings{'NEW_IGNORE_ENTRY'})) && (!&General::validipandmask($settings{'NEW_IGNORE_ENTRY'}))) {
 140                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 141                 }
 142         } else {
 143                 $errormessage = "$Lang::tr{'guardian empty input'}";
 144         }
 145
 146         # Go further if there was no error.
 147         if ($errormessage eq '') {
 148                 my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
 149
 150                 # Open file for appending the new entry.
 151                 open (FILE, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
 152
 153                 # Write the new entry to the ignore file.
 154                 print FILE "$new_entry\n";
 155                 close(FILE);
 156         }
 157
 158         # Check if guardian is running.
 159         if ($pid > 0) {
 160                 # Send reload command through socket connection.
 161                 &Guardian::Socket::Client("reload");
 162         }
 163
 164 ## Remove entry from ignore list.
 165 #
 166 } elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 167         my $id = 0;
 168
 169         # Open ignorefile and read content.
 170         open(FILE, "<$ignorefile") or die "Unable to open $ignorefile.";
 171         my @current = <FILE>;
 172         close(FILE);
 173
 174         # Re-open ignorefile for writing.
 175         open(FILE, ">$ignorefile") or die "Unable to open $ignorefile for writing";
 176         flock FILE, 2;
 177
 178         # Read line by line from ignorefile and write them back except the line with the given ID.
 179         # So this line is missing in the new file and the entry has been deleted.
 180         foreach my $line (@current) {
 181                 $id++;
 182                 unless ($settings{'ID'} eq $id) {
 183                         print FILE "$line";
 184                 }
 185         }
 186         close(FILE);
 187
 188         # Check if guardian is running.
 189         if ($pid > 0) {
 190                 # Send reload command through socket connection.
 191                 &Guardian::Socket::Client("reload");
 192         }
 193
 194 ## Block a user given address or subnet.
 195 #
 196 } elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
 197
 198         # Assign some temporary variables used for input validation.
 199         my $input = $settings{'ADDRESS_BLOCK'};
 200         my $green = $netsettings{'GREEN_ADDRESS'};
 201         my $blue = $netsettings{'BLUE_ADDRESS'};
 202         my $orange = $netsettings{'ORANGE_ADDRESS'};
 203         my $red = $netsettings{'RED_ADDRESS'};
 204
 205         # Get gateway address.
 206         my $gateway = &General::get_gateway();
 207
 208         # Check if any input has been performed.
 209         if ($input eq '') {
 210                 $errormessage = "$Lang::tr{'guardian empty input'}";
 211         }
 212
 213         # Check if the given input is localhost (127.0.0.1).
 214         elsif ($input eq "127.0.0.1") {
 215                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 216         }
 217
 218         # Check if the given input is anywhere (0.0.0.0).
 219         elsif ($input eq "0.0.0.0") {
 220                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 221         }
 222
 223         # Check if the given input is one of the interface addresses or our gateway.
 224         elsif ($input eq "$green" || $input eq "$blue" || $input eq "$orange" || $input eq "$red" || $input eq "$gateway") {
 225                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 226         }
 227
 228         # Check if the given input is a valid IP address.
 229         elsif (!&General::validip($input)) {
 230                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 231         }
 232
 233         # Go further if there was no error.
 234         if ($errormessage eq '') {
 235                 my $block = $settings{'ADDRESS_BLOCK'};
 236
 237                 # Send command to block the specified address through socket connection.
 238                 &Guardian::Socket::Client("block $block");
 239         }
 240
 241 ## Unblock address or subnet.
 242 #
 243 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
 244
 245         # Check if no empty input has been performed.
 246         if ($settings{'ADDRESS_UNBLOCK'} ne '') {
 247
 248                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 249                 if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
 250                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 251                 }
 252
 253         } else {
 254                 $errormessage = "$Lang::tr{'guardian empty input'}";
 255         }
 256
 257         # Go further if there was no error.
 258         if ($errormessage eq '') {
 259                 my $unblock = $settings{'ADDRESS_UNBLOCK'};
 260
 261                 # Send command to unblock the given address through socket connection.
 262                 &Guardian::Socket::Client("unblock $unblock");
 263         }
 264
 265 ## Unblock all.
 266 #
 267 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
 268
 269         # Send flush command through socket connection.
 270         &Guardian::Socket::Client("flush");
 271 }
 272
 273 # Load settings from file.
 274 &General::readhash("${General::swroot}/guardian/settings", \%settings);
 275
 276 # Call functions to generate whole page.
 277 &showMainBox();
 278 &showIgnoreBox();
 279
 280 # Display area only if guardian is running.
 281 if ( ($memory != 0) && ($pid > 0) ) {
 282         &showBlockedBox();
 283 }
 284
 285 # Function to display the status of guardian and allow base configuration.
 286 sub showMainBox() {
 287         my %checked = ();
 288         my %selected = ();
 289
 290         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 291         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 292         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 293         $checked{'GUARDIAN_MONITOR_SNORT'}{'off'} = '';
 294         $checked{'GUARDIAN_MONITOR_SNORT'}{'on'} = '';
 295         $checked{'GUARDIAN_MONITOR_SNORT'}{$settings{'GUARDIAN_MONITOR_SNORT'}} = "checked='checked'";
 296         $checked{'GUARDIAN_MONITOR_SSH'}{'off'} = '';
 297         $checked{'GUARDIAN_MONITOR_SSH'}{'on'} = '';
 298         $checked{'GUARDIAN_MONITOR_SSH'}{$settings{'GUARDIAN_MONITOR_SSH'}} = "checked='checked'";
 299         $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} = '';
 300         $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} = '';
 301         $checked{'GUARDIAN_MONITOR_HTTPD'}{$settings{'GUARDIAN_MONITOR_HTTPD'}} = "checked='checked'";
 302         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'off'} = '';
 303         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'on'} = '';
 304         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{$settings{'GUARDIAN_MONITOR_OWNCLOUD'}} = "checked='checked'";
 305
 306         $selected{'GUARDIAN_LOG_FACILITY'}{$settings{'GUARDIAN_LOG_FACILITY'}} = 'selected';
 307         $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}} = 'selected';
 308         $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{$settings{'GUARDIAN_SNORT_PRIORITY_LEVEL'}} = 'selected';
 309
 310         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 311         &Header::openbigbox('100%', 'left', '', $errormessage);
 312
 313         # Print errormessage if there is one.
 314         if ($errormessage) {
 315                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 316                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 317                 &Header::closebox();
 318         }
 319
 320
 321         # Draw current guardian state.
 322         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 323
 324         # Get current status of guardian.
 325         &daemonstats();
 326         $pid = $pid[0];
 327
 328         # Display some useful information related to guardian, if daemon is running.
 329         if ( ($memory != 0) && ($pid > 0) ){
 330                 print <<END;
 331                         <table width='95%' cellspacing='0' class='tbl'>
 332                                 <tr>
 333                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 334                                 </tr>
 335                                 <tr>
 336                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 337                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 338                                 </tr>
 339                                 <tr>
 340                                         <td class='base'></td>
 341                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 342                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 343                                 </tr>
 344                                 <tr>
 345                                         <td class='base'></td>
 346                                         <td bgcolor='$color{'color22'}' align='center'>$pid</td>
 347                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 348                                 </tr>
 349                         </table>
 350 END
 351         } else {
 352                 # Otherwise display a hint that the service is not launched.
 353                 print <<END;
 354                         <table width='95%' cellspacing='0' class='tbl'>
 355                                 <tr>
 356                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 357                                 </tr>
 358                                 <tr>
 359                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 360                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 361                                 </tr>
 362                         </table>
 363 END
 364         }
 365
 366         &Header::closebox();
 367
 368         # Draw elements for guardian configuration.
 369         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 370
 371         print <<END;
 372                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 373
 374                 <table width='95%'>
 375                         <tr>
 376                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 377                         </tr>
 378                         <tr>
 379                                 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 380                                 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 381                         </tr>
 382                         <tr>
 383                                 <td colspan='2'><br></td>
 384                         </tr>
 385                         <tr>
 386                                 <td width='20%' class='base'>$Lang::tr{'guardian watch snort alertfile'}</td>
 387                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_SNORT' value='on' $checked{'GUARDIAN_MONITOR_SNORT'}{'on'} /> /
 388                                 <input type='radio' name='GUARDIAN_MONITOR_SNORT' value='off' $checked{'GUARDIAN_MONITOR_SNORT'}{'off'} /> off</td>
 389                         </tr>
 390                         <tr>
 391                                 <td width='20%' class='base'>$Lang::tr{'guardian block ssh brute-force'}</td>
 392                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_SSH' value='on' $checked{'GUARDIAN_MONITOR_SSH'}{'on'} /> /
 393                                 <input type='radio' name='GUARDIAN_MONITOR_SSH' value='off' $checked{'GUARDIAN_MONITOR_SSH'}{'off'} /> off</td>
 394                         </tr>
 395                         <tr>
 396                                 <td width='20%' class='base'>$Lang::tr{'guardian block httpd brute-force'}</td>
 397                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='on' $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} /> /
 398                                 <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='off' $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} /> off</td>
 399                         </tr>
 400 END
 401                         # Display owncloud checkbox when the addon is installed.
 402                         if ( -e "$owncloud_meta" ) {
 403                                 print"<tr>\n";
 404                                 print"<td width='20%' class='base'>$Lang::tr{'guardian block owncloud brute-force'}</td>\n";
 405                                 print"<td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_OWNCLOUD' value='on' $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'on'} /> /\n";
 406                                 print"<input type='radio' name='GUARDIAN_MONITOR_OWNCLOUD' value='off' $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'off'} /> off</td>\n";
 407                                 print"</tr>\n";
 408                         }
 409         print <<END;
 410                         <tr>
 411                                 <td colspan='2'><br></td>
 412                         </tr>
 413                         <tr>
 414                                 <td align='left' width='20%'>$Lang::tr{'guardian logfacility'}:</td>
 415                                 <td><select name='GUARDIAN_LOG_FACILITY'>
 416                                         <option value='syslog' $selected{'GUARDIAN_LOG_FACILITY'}{'syslog'}>syslog</option>
 417                                         <option value='file' $selected{'GUARDIAN_LOG_FACILITY'}{'file'}>file</option>
 418                                         <option value='console' $selected{'GUARDIAN_LOG_FACILITY'}{'console'}>console</option>
 419                                 </select></td>
 420                         </tr>
 421                         <tr>
 422                                 <td colspan='2'><br></td>
 423                         </tr>
 424                         <tr>
 425                                 <td align='left' width='20%'>$Lang::tr{'guardian loglevel'}:</td>
 426                                 <td><select name='GUARDIAN_LOGLEVEL'>
 427                                         <option value='off' $selected{'GUARDIAN_LOGLEVEL'}{'off'}>off</option>
 428                                         <option value='info' $selected{'GUARDIAN_LOGLEVEL'}{'info'}>info</option>
 429                                         <option value='debug' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>debug</option>
 430                                 </select></td>
 431                         </tr>
 432                         <tr>
 433                                 <td colspan='2'><br></td>
 434                         </tr>
 435                         <tr>
 436                                 <td align='left' width='20%'>$Lang::tr{'guardian priority level'}:</td>
 437                                 <td><select name='GUARDIAN_SNORT_PRIORITY_LEVEL'>
 438                                         <option value='1' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'1'}>1</option>
 439                                         <option value='2' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'2'}>2</option>
 440                                         <option value='3' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'3'}>3</option>
 441                                         <option value='4' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'4'}>4</option>
 442                                 </select></td>
 443                         </tr>
 444                         <tr>
 445                                 <td colspan='2'><br></td>
 446                         </tr>
 447                         <tr>
 448                                 <td width='20%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
 449                                 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
 450                         </tr>
 451                         <tr>
 452                                 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 453                                 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 454                         </tr>
 455                         <tr>
 456                                 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 457                                 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 458                         </tr>
 459                 </table>
 460 END
 461
 462         print <<END;
 463                 <hr>
 464
 465                 <table width='95%'>
 466                         <tr>
 467                                 <td>&nbsp;</td>
 468                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 469                                 <td>&nbsp;</td>
 470                         </tr>
 471                 </table>
 472         </form>
 473 END
 474
 475         &Header::closebox();
 476 }
 477
 478 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 479 sub showIgnoreBox() {
 480         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 481
 482         print <<END;
 483                 <table width='60%'>
 484                         <tr>
 485                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
 486                         </tr>
 487 END
 488                         # Check if the guardian ignore file contains any content.
 489                         if (-s $ignorefile) {
 490
 491                                 # Open file and print contents.
 492                                 open FILE, $ignorefile or die "Could not open $ignorefile";
 493
 494                                 my $id = 0;
 495                                 my $col = "";
 496
 497                                 # Read file line by line and print out the elements.
 498                                 while( my $ignored_element = <FILE> )  {
 499
 500                                         # Increase id number for each element in the ignore file.
 501                                         $id++;
 502
 503                                         # Check if the id number is even or not.
 504                                         if ($id % 2) {
 505                                                 $col="bgcolor='$color{'color22'}'";
 506                                         } else {
 507                                                 $col="bgcolor='$color{'color20'}'";
 508                                         }
 509
 510                                         print <<END;
 511                                         <tr>
 512                                                 <td width='80%' class='base' $col>$ignored_element</td>
 513                                                 <td width='20%' align='center' $col>
 514                                                         <form method='post' name='$id' action='$ENV{'SCRIPT_NAME'}'>
 515                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 516                                                                 <input type='hidden' name='ID' value='$id'>
 517                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 518                                                         </form>
 519                                                 </td>
 520                                         </tr>
 521 END
 522                                 }
 523                         close (FILE);
 524                         } else {
 525                                 # Print notice that currently no elements are stored in the ignore file.
 526                                 print "<tr>\n";
 527                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 528                                 print "</tr>\n";
 529                         }
 530
 531                 print "</table>\n";
 532
 533         # Section to add new elements to the ignore list.
 534         print <<END;
 535         <br>
 536         <div align='center'>
 537                 <table width='60%'>
 538                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 539                         <tr>
 540                                 <td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
 541                                 <td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
 542                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
 543                         </tr>
 544                         </form>
 545                 </table>
 546         </div>
 547 END
 548
 549         &Header::closebox();
 550 }
 551
 552 # Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
 553 sub showBlockedBox() {
 554         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 555
 556         print <<END;
 557         <table width='60%'>
 558                 <tr>
 559                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 560                 </tr>
 561 END
 562
 563                 # Lauch function to get the currently blocked hosts.
 564                 my @blocked_hosts = &GetBlockedHosts();
 565
 566                 my $id = 0;
 567                 my $col = "";
 568
 569                 # Loop through our blocked hosts array.
 570                 foreach my $blocked_host (@blocked_hosts) {
 571
 572                         # Increase id number for each element in the ignore file.
 573                         $id++;
 574
 575                         # Check if the id number is even or not.
 576                         if ($id % 2) {
 577                                 $col="bgcolor='$color{'color22'}'";
 578                         } else {
 579                                 $col="bgcolor='$color{'color20'}'";
 580                         }
 581
 582                         print <<END;
 583                         <tr>
 584                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 585                                 <td width='20%' align='center' $col>
 586                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 587                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 588                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 589                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 590                                         </form>
 591                                 </td>
 592                         </tr>
 593 END
 594                 }
 595
 596         # If the loop only has been runs once the id still is "0", which means there are no
 597         # additional entries (blocked hosts) in the iptables chain.
 598         if ($id == 0) {
 599
 600                 # Print notice that currently no hosts are blocked.
 601                 print "<tr>\n";
 602                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 603                 print "</tr>\n";
 604         }
 605
 606         print "</table>\n";
 607
 608         # Section for a manual block of an IP-address.
 609         print <<END;
 610         <br>
 611         <div align='center'>
 612                 <table width='60%' border='0'>
 613                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 614                         <tr>
 615                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 616                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 617                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 618                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 619                         </tr>
 620                         </form>
 621                 </table>
 622         </div>
 623 END
 624
 625         &Header::closebox();
 626 }
 627
 628 &Header::closebigbox();
 629 &Header::closepage();
 630
 631 # Function to check if guardian has been started.
 632 # Grab process id and consumed memory if the daemon is running.
 633 sub daemonstats() {
 634         $memory = 0;
 635         # for pid and memory
 636         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 637         @guardian = <FILE>;
 638         close(FILE);
 639         $string = join("", @guardian);
 640         $string =~ s/[a-z_]//gi;
 641         $string =~ s/\[[0-1]\;[0-9]+//gi;
 642         $string =~ s/[\(\)\.]//gi;
 643         $string =~ s/  //gi;
 644         $string =~ s/\e//gi;
 645         @pid = split(/\s/,$string);
 646         if (open(FILE, "/proc/$pid[0]/statm")){
 647                 my $temp = <FILE>;
 648                 @memory = split(/ /,$temp);
 649                 close(FILE);
 650         }
 651         $memory+=$memory[0];
 652 }
 653
 654 sub GetBlockedHosts() {
 655         # Create new, empty array.
 656         my @hosts;
 657
 658         # Lauch helper to get chains from iptables.
 659         system('/usr/local/bin/getipstat');
 660
 661         # Open temporary file which contains the chains and rules.
 662         open (FILE, '/srv/web/ipfire/html/iptables.txt');
 663
 664         # Loop through the entire file.
 665         while (<FILE>) {
 666                 my $line = $_;
 667
 668                 # Search for the guardian chain and extract
 669                 # the lines between it and the next empty line
 670                 # which is placed before the next firewall
 671                 # chain starts.
 672                 if ($line =~ /^Chain GUARDIAN/ .. /^\s*$/) {
 673                         # Skip descriptive lines.
 674                         next if ($line =~ /^Chain/);
 675                         next if ($line =~ /^ pkts/);
 676
 677                         # Generate array, based on the line content (seperator is a single or multiple space's)
 678                         my @comps = split(/\s{1,}/, $line);
 679                         my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 680
 681                         # Assign different variable names.
 682                         my $blocked_host = $source;
 683
 684                         # Add host to our hosts array.
 685                         if ($blocked_host) {
 686                                 push(@hosts, $blocked_host);
 687                         }
 688                 }
 689         }
 690
 691         # Close filehandle.
 692         close(FILE);
 693
 694         # Remove recently created temporary files of the "getipstat" binary.
 695         system(rm -f "/srv/web/ipfire/html/iptables.txt");
 696         system(rm -f "/srv/web/ipfire/html/iptablesmangle.txt");
 697         system(rm -f "/srv/web/ipfire/html/iptablesnat.txt");
 698
 699         # Convert entries, sort them, write back and store the sorted entries into new array.
 700         my @sorted = map  { $_->[0] }
 701              sort { $a->[1] <=> $b->[1] }
 702              map  { [$_, int sprintf("%03.f%03.f%03.f%03.f", split(/\./, $_))] }
 703              @hosts;
 704
 705         # Return our sorted list.
 706         return @sorted
 707 }
 708
 709 sub BuildConfiguration() {
 710         my %settings = ();
 711         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 712
 713         my $configfile = "${General::swroot}/guardian/guardian.conf";
 714
 715         # Open configfile for writing.
 716         open(FILE, ">$configfile");
 717
 718         # Config file header.
 719         print FILE "# Autogenerated configuration file.\n";
 720         print FILE "# All user modifications will be overwritten.\n\n";
 721
 722         # Settings for the logging mechanism.
 723         print FILE "# Log settings.\n";
 724         print FILE "LogFacility = $settings{'GUARDIAN_LOG_FACILITY'}\n";
 725
 726         if ($settings{'GUARDIAN_LOG_FACILITY'} eq "file") {
 727                 print FILE "LogFile = $settings{'GUARDIAN_LOGFILE'}\n";
 728         }
 729
 730         print FILE "LogLevel = $settings{'GUARDIAN_LOGLEVEL'}\n\n";
 731
 732         # IPFire related static settings.
 733         print FILE "# IPFire related settings.\n";
 734         print FILE "FirewallEngine = IPtables\n";
 735         print FILE "SocketOwner = nobody:nobody\n";
 736         print FILE "IgnoreFile = $ignorefile\n\n";
 737
 738         # Configured block values.
 739         print FILE "# Configured block values.\n";
 740         print FILE "BlockCount = $settings{'GUARDIAN_BLOCKCOUNT'}\n";
 741         print FILE "BlockTime = $settings{'GUARDIAN_BLOCKTIME'}\n\n";
 742
 743         # Enabled modules.
 744         # Loop through whole settings hash.
 745         print FILE "# Enabled modules.\n";
 746         foreach my $option (keys %settings) {
 747                 # Search for enabled modules.
 748                 if ($option =~ /GUARDIAN_MONITOR_(.*)/) {
 749                         # Skip if module is not enabled.
 750                         next unless($settings{$option} eq "on");
 751
 752                         # Skip module if no file location is available.
 753                         next unless(exists($module_file_locations{$1}));
 754
 755                         # Add enabled module and defined path to the config file.
 756                         print FILE "Monitor_$1 = $module_file_locations{$1}\n";
 757                 }
 758         }
 759
 760         # Module settings.
 761         print FILE "\n# Module settings.\n";
 762         # Check if SNORT is enabled and add snort priority.
 763         if ($settings{'GUARDIAN_MONITOR_SNORT'} eq "on") {
 764                 print FILE "SnortPriorityLevel = $settings{'GUARDIAN_SNORT_PRIORITY_LEVEL'}\n";
 765         }
 766
 767         close(FILE);
 768
 769         # Check if guardian should be started or stopped.
 770         if($settings{'GUARDIAN_ENABLED'} eq 'on') {
 771                 if($pid > 0) {
 772                         # Send reload command through socket connection.
 773                         &Guardian::Socket::Client("reload");
 774                 } else {
 775                         # Launch guardian.
 776                         system("/usr/local/bin/addonctrl guardian start &>/dev/null");
 777                 }
 778         } else {
 779                 # Stop the daemon.
 780                 system("/usr/local/bin/addonctrl guardian stop &>/dev/null");
 781         }
 782 }