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 $ignorefile ='/var/ipfire/guardian/guardian.ignore';
  50
  51 # Hash which contains the supported modules and the
  52 # file locations on IPFire systems.
  53 my %module_file_locations = (
  54         "HTTPD" => "/var/log/httpd/error_log",
  55         "SSH" => "/var/log/messages",
  56 );
  57
  58 our %netsettings = ();
  59 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  60
  61 our %color = ();
  62 our %mainsettings = ();
  63 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  64 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  65
  66 # File declarations.
  67 my $settingsfile = "${General::swroot}/guardian/settings";
  68 my $ignoredfile = "${General::swroot}/guardian/ignored";
  69
  70 # Create empty settings and ignoredfile if they do not exist yet.
  71 unless (-e "$settingsfile") { system("touch $settingsfile"); }
  72 unless (-e "$ignoredfile") { system("touch $ignoredfile"); }
  73
  74 our %settings = ();
  75 our %ignored  = ();
  76
  77 $settings{'ACTION'} = '';
  78
  79 $settings{'GUARDIAN_ENABLED'} = 'off';
  80 $settings{'GUARDIAN_MONITOR_SSH'} = 'on';
  81 $settings{'GUARDIAN_MONITOR_HTTPD'} = 'on';
  82 $settings{'GUARDIAN_MONITOR_OWNCLOUD'} = '';
  83 $settings{'GUARDIAN_LOG_FACILITY'} = 'syslog';
  84 $settings{'GUARDIAN_LOGLEVEL'} = 'info';
  85 $settings{'GUARDIAN_BLOCKCOUNT'} = '3';
  86 $settings{'GUARDIAN_BLOCKTIME'} = '86400';
  87 $settings{'GUARDIAN_FIREWALL_ACTION'} = 'DROP';
  88 $settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
  89
  90 my $errormessage = '';
  91
  92 &Header::showhttpheaders();
  93
  94 # Get GUI values.
  95 &Header::getcgihash(\%settings);
  96
  97 # Check if guardian is running and grab some stats.
  98 &daemonstats();
  99 my $pid = $pid[0];
 100
 101 ## Perform input checks and save settings.
 102 #
 103 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
 104         # Check for valid blocktime.
 105         unless(($settings{'GUARDIAN_BLOCKTIME'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKTIME'} ne "0")) {
 106                         $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
 107         }
 108
 109         # Check if the blockcount is valid.
 110         unless(($settings{'GUARDIAN_BLOCKCOUNT'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKCOUNT'} ne "0")) {
 111                         $errormessage = "$Lang::tr{'guardian invalid blockcount'}";
 112         }
 113
 114         # Check Logfile.
 115         unless($settings{'GUARDIAN_LOGFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 116                 $errormessage = "$Lang::tr{'guardian invalid logfile'}";
 117         }
 118
 119         # Only continue if no error message has been set.
 120         if($errormessage eq '') {
 121                 # Write configuration settings to file.
 122                 &General::writehash("${General::swroot}/guardian/settings", \%settings);
 123
 124                 # Update configuration files.
 125                 &BuildConfiguration();
 126         }
 127
 128 ## Add/edit an entry to the ignore file.
 129 #
 130 } elsif (($settings{'ACTION'} eq $Lang::tr{'add'}) || ($settings{'ACTION'} eq $Lang::tr{'update'})) {
 131
 132         # Check if any input has been performed.
 133         if ($settings{'IGNORE_ENTRY_ADDRESS'} ne '') {
 134
 135                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 136                 if ((!&General::validip($settings{'IGNORE_ENTRY_ADDRESS'})) && (!&General::validipandmask($settings{'IGNORE_ENTRY_ADDRESS'}))) {
 137                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 138                 }
 139         } else {
 140                 $errormessage = "$Lang::tr{'guardian empty input'}";
 141         }
 142
 143         # Go further if there was no error.
 144         if ($errormessage eq '') {
 145                 my %ignored = ();
 146                 my $id;
 147                 my $status;
 148
 149                 # Assign hash values.
 150                 my $new_entry_address = $settings{'IGNORE_ENTRY_ADDRESS'};
 151                 my $new_entry_remark = $settings{'IGNORE_ENTRY_REMARK'};
 152
 153                 # Read-in ignoredfile.
 154                 &General::readhasharray($ignoredfile, \%ignored);
 155
 156                 # Check if we should edit an existing entry and got an ID.
 157                 if (($settings{'ACTION'} eq $Lang::tr{'update'}) && ($settings{'ID'})) {
 158                         # Assin the provided id.
 159                         $id = $settings{'ID'};
 160
 161                         # Undef the given ID.
 162                         undef($settings{'ID'});
 163
 164                         # Grab the configured status of the corresponding entry.
 165                         $status = $ignored{$id}[2];
 166                 } else {
 167                         # Each newly added entry automatically should be enabled.
 168                         $status = "enabled";
 169
 170                         # Generate the ID for the new entry.
 171                         #
 172                         # Sort the keys by their ID and store them in an array.
 173                         my @keys = sort { $a <=> $b } keys %ignored;
 174
 175                         # Reverse the key array.
 176                         my @reversed = reverse(@keys);
 177
 178                         # Obtain the last used id.
 179                         my $last_id = @reversed[0];
 180
 181                         # Increase the last id by one and use it as id for the new entry.
 182                         $id = ++$last_id;
 183                 }
 184
 185                 # Add/Modify the entry to/in the ignored hash.
 186                 $ignored{$id} = ["$new_entry_address", "$new_entry_remark", "$status"];
 187
 188                 # Write the changed ignored hash to the ignored file.
 189                 &General::writehasharray($ignoredfile, \%ignored);
 190
 191                 # Regenerate the ignore file.
 192                 &GenerateIgnoreFile();
 193         }
 194
 195         # Check if guardian is running.
 196         if ($pid > 0) {
 197                 # Send reload command through socket connection.
 198                 &Guardian::Socket::Client("reload-ignore-list");
 199         }
 200
 201 ## Toggle Enabled/Disabled for an existing entry on the ignore list.
 202 #
 203
 204 } elsif ($settings{'ACTION'} eq $Lang::tr{'toggle enable disable'}) {
 205         my %ignored = ();
 206
 207         # Only go further, if an ID has been passed.
 208         if ($settings{'ID'}) {
 209                 # Assign the given ID.
 210                 my $id = $settings{'ID'};
 211
 212                 # Undef the given ID.
 213                 undef($settings{'ID'});
 214
 215                 # Read-in ignoredfile.
 216                 &General::readhasharray($ignoredfile, \%ignored);
 217
 218                 # Grab the configured status of the corresponding entry.
 219                 my $status = $ignored{$id}[2];
 220
 221                 # Switch the status.
 222                 if ($status eq "disabled") {
 223                         $status = "enabled";
 224                 } else {
 225                         $status = "disabled";
 226                 }
 227
 228                 # Modify the status of the existing entry.
 229                 $ignored{$id} = ["$ignored{$id}[0]", "$ignored{$id}[1]", "$status"];
 230
 231                 # Write the changed ignored hash to the ignored file.
 232                 &General::writehasharray($ignoredfile, \%ignored);
 233
 234                 # Regenerate the ignore file.
 235                 &GenerateIgnoreFile();
 236
 237                 # Check if guardian is running.
 238                 if ($pid > 0) {
 239                         # Send reload command through socket connection.
 240                         &Guardian::Socket::Client("reload-ignore-list");
 241                 }
 242         }
 243
 244 ## Remove entry from ignore list.
 245 #
 246 } elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 247         my %ignored = ();
 248
 249         # Read-in ignoredfile.
 250         &General::readhasharray($ignoredfile, \%ignored);
 251
 252         # Drop entry from the hash.
 253         delete($ignored{$settings{'ID'}});
 254
 255         # Undef the given ID.
 256         undef($settings{'ID'});
 257
 258         # Write the changed ignored hash to the ignored file.
 259         &General::writehasharray($ignoredfile, \%ignored);
 260
 261         # Regenerate the ignore file.
 262         &GenerateIgnoreFile();
 263
 264         # Check if guardian is running.
 265         if ($pid > 0) {
 266                 # Send reload command through socket connection.
 267                 &Guardian::Socket::Client("reload-ignore-list");
 268         }
 269
 270 ## Block a user given address or subnet.
 271 #
 272 } elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
 273
 274         # Assign some temporary variables used for input validation.
 275         my $input = $settings{'ADDRESS_BLOCK'};
 276         my $green = $netsettings{'GREEN_ADDRESS'};
 277         my $blue = $netsettings{'BLUE_ADDRESS'};
 278         my $orange = $netsettings{'ORANGE_ADDRESS'};
 279         my $red = $netsettings{'RED_ADDRESS'};
 280
 281         # File declarations.
 282         my $gatewayfile = "${General::swroot}/red/remote-ipaddress";
 283         my $dns1file = "${General::swroot}/red/dns1";
 284         my $dns2file = "${General::swroot}/red/dns2";
 285
 286         # Get gateway address.
 287         my $gateway = &_get_address_from_file($gatewayfile);
 288
 289         # Get addresses from the used dns servers.
 290         my $dns1 = &_get_address_from_file($dns1file);
 291         my $dns2 = &_get_address_from_file($dns2file);
 292
 293         # Check if any input has been performed.
 294         if ($input eq '') {
 295                 $errormessage = "$Lang::tr{'guardian empty input'}";
 296         }
 297
 298         # Check if the given input is localhost (127.0.0.1).
 299         elsif ($input eq "127.0.0.1") {
 300                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 301         }
 302
 303         # Check if the given input is anywhere (0.0.0.0).
 304         elsif ($input eq "0.0.0.0") {
 305                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 306         }
 307
 308         # Check if the given input is one of the interface addresses or our gateway.
 309         elsif ($input eq "$green" || $input eq "$blue" || $input eq "$orange" || $input eq "$red" || $input eq "$gateway" || $input eq "$dns1" || $input eq "$dns2") {
 310                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 311         }
 312
 313         # Check if the given input is a valid IP address.
 314         elsif (!&General::validip($input)) {
 315                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 316         }
 317
 318         # Go further if there was no error.
 319         if ($errormessage eq '') {
 320                 my $block = $settings{'ADDRESS_BLOCK'};
 321
 322                 # Send command to block the specified address through socket connection.
 323                 &Guardian::Socket::Client("block $block");
 324         }
 325
 326 ## Unblock address or subnet.
 327 #
 328 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
 329
 330         # Check if no empty input has been performed.
 331         if ($settings{'ADDRESS_UNBLOCK'} ne '') {
 332
 333                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 334                 if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
 335                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 336                 }
 337
 338         } else {
 339                 $errormessage = "$Lang::tr{'guardian empty input'}";
 340         }
 341
 342         # Go further if there was no error.
 343         if ($errormessage eq '') {
 344                 my $unblock = $settings{'ADDRESS_UNBLOCK'};
 345
 346                 # Send command to unblock the given address through socket connection.
 347                 &Guardian::Socket::Client("unblock $unblock");
 348         }
 349
 350 ## Unblock all.
 351 #
 352 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
 353
 354         # Send flush command through socket connection.
 355         &Guardian::Socket::Client("flush");
 356 }
 357
 358 # Load settings from files.
 359 &General::readhash("${General::swroot}/guardian/settings", \%settings);
 360 &General::readhasharray("${General::swroot}/guardian/ignored", \%ignored);
 361
 362 # Call functions to generate whole page.
 363 &showMainBox();
 364 &showIgnoreBox();
 365
 366 # Display area only if guardian is running.
 367 if ( ($memory != 0) && ($pid > 0) ) {
 368         &showBlockedBox();
 369 }
 370
 371 # Function to display the status of guardian and allow base configuration.
 372 sub showMainBox() {
 373         my %checked = ();
 374         my %selected = ();
 375
 376         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 377         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 378         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 379         $checked{'GUARDIAN_MONITOR_SSH'}{'off'} = '';
 380         $checked{'GUARDIAN_MONITOR_SSH'}{'on'} = '';
 381         $checked{'GUARDIAN_MONITOR_SSH'}{$settings{'GUARDIAN_MONITOR_SSH'}} = "checked='checked'";
 382         $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} = '';
 383         $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} = '';
 384         $checked{'GUARDIAN_MONITOR_HTTPD'}{$settings{'GUARDIAN_MONITOR_HTTPD'}} = "checked='checked'";
 385         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'off'} = '';
 386         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'on'} = '';
 387         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{$settings{'GUARDIAN_MONITOR_OWNCLOUD'}} = "checked='checked'";
 388
 389         $selected{'GUARDIAN_LOG_FACILITY'}{$settings{'GUARDIAN_LOG_FACILITY'}} = 'selected';
 390         $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}} = 'selected';
 391         $selected{'GUARDIAN_FIREWALL_ACTION'}{$settings{'GUARDIAN_FIREWALL_ACTION'}} = 'selected';
 392
 393         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 394         &Header::openbigbox('100%', 'left', '', $errormessage);
 395
 396         # Print errormessage if there is one.
 397         if ($errormessage) {
 398                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 399                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 400                 &Header::closebox();
 401         }
 402
 403         ### Java Script ###
 404         print<<END;
 405         <script>
 406                 var update_options = function() {
 407
 408                         var logfacility = \$("#GUARDIAN_LOG_FACILITY").val();
 409                         var loglevel = \$("#GUARDIAN_LOGLEVEL").val();
 410
 411                         if (logfacility === undefined)
 412                                 return;
 413
 414                         if (loglevel === undefined)
 415                                 return;
 416
 417                         // Show / Hide input for specifying the path to the logfile.
 418                         if (logfacility === "file") {
 419                                 \$(".GUARDIAN_LOGFILE").show();
 420                         } else {
 421                                 \$(".GUARDIAN_LOGFILE").hide();
 422                         }
 423
 424                         // Show / Hide loglevel debug if the facility is set to syslog.
 425                         if (logfacility === "syslog") {
 426                                 \$("#loglevel_debug").hide();
 427                         } else {
 428                                 \$("#loglevel_debug").show();
 429                         }
 430
 431                         // Show / Hide logfacility syslog if the loglevel is set to debug.
 432                         if (loglevel === "debug") {
 433                                 \$("#logfacility_syslog").hide();
 434                         } else {
 435                                 \$("#logfacility_syslog").show();
 436                         }
 437                 };
 438
 439                 \$(document).ready(function() {
 440                         \$("#GUARDIAN_LOG_FACILITY").change(update_options);
 441                         \$("#GUARDIAN_LOGLEVEL").change(update_options);
 442                         update_options();
 443                 });
 444         </script>
 445 END
 446
 447
 448
 449         # Draw current guardian state.
 450         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 451
 452         # Get current status of guardian.
 453         &daemonstats();
 454         $pid = $pid[0];
 455
 456         # Display some useful information related to guardian, if daemon is running.
 457         if ( ($memory != 0) && ($pid > 0) ){
 458                 print <<END;
 459                         <table width='95%' cellspacing='0' class='tbl'>
 460                                 <tr>
 461                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 462                                 </tr>
 463                                 <tr>
 464                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 465                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 466                                 </tr>
 467                                 <tr>
 468                                         <td class='base'></td>
 469                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 470                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 471                                 </tr>
 472                                 <tr>
 473                                         <td class='base'></td>
 474                                         <td bgcolor='$color{'color22'}' align='center'>$pid</td>
 475                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 476                                 </tr>
 477                         </table>
 478 END
 479         } else {
 480                 # Otherwise display a hint that the service is not launched.
 481                 print <<END;
 482                         <table width='95%' cellspacing='0' class='tbl'>
 483                                 <tr>
 484                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 485                                 </tr>
 486                                 <tr>
 487                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 488                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 489                                 </tr>
 490                         </table>
 491 END
 492         }
 493
 494         &Header::closebox();
 495
 496         # Draw elements for guardian configuration.
 497         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 498
 499         print <<END;
 500                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 501
 502                 <table width='95%'>
 503                         <tr>
 504                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 505                         </tr>
 506
 507                         <tr>
 508                                 <td width='25%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 509                                 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 510                         </tr>
 511
 512                         <tr>
 513                                 <td colspan='2'><br></td>
 514                         </tr>
 515
 516                         <tr>
 517                                 <td width='25%' class='base'>$Lang::tr{'guardian block ssh brute-force'}</td>
 518                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_SSH' value='on' $checked{'GUARDIAN_MONITOR_SSH'}{'on'} /> /
 519                                 <input type='radio' name='GUARDIAN_MONITOR_SSH' value='off' $checked{'GUARDIAN_MONITOR_SSH'}{'off'} /> off</td>
 520                         </tr>
 521
 522                         <tr>
 523                                 <td width='25%' class='base'>$Lang::tr{'guardian block httpd brute-force'}</td>
 524                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='on' $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} /> /
 525                                 <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='off' $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} /> off</td>
 526                         </tr>
 527
 528                         <tr>
 529                                 <td colspan='2'><br></td>
 530                         </tr>
 531
 532                         <tr>
 533                                 <td align='left' width='20%'>$Lang::tr{'guardian logfacility'}:</td>
 534                                 <td width='25%'><select id='GUARDIAN_LOG_FACILITY' name='GUARDIAN_LOG_FACILITY'>
 535                                         <option id='logfacility_syslog' value='syslog' $selected{'GUARDIAN_LOG_FACILITY'}{'syslog'}>$Lang::tr{'guardian logtarget_syslog'}</option>
 536                                         <option id='logfacility_file' value='file' $selected{'GUARDIAN_LOG_FACILITY'}{'file'}>$Lang::tr{'guardian logtarget_file'}</option>
 537                                         <option id='logfacility_console' value='console' $selected{'GUARDIAN_LOG_FACILITY'}{'console'}>$Lang::tr{'guardian logtarget_console'}</option>
 538                                 </select></td>
 539
 540                                 <td align='left' width='20%'>$Lang::tr{'guardian loglevel'}:</td>
 541                                 <td width='25%'><select id='GUARDIAN_LOGLEVEL' name='GUARDIAN_LOGLEVEL'>
 542                                         <option id='loglevel_off' value='off' $selected{'GUARDIAN_LOGLEVEL'}{'off'}>$Lang::tr{'guardian loglevel_off'}</option>
 543                                         <option id='loglevel_info' value='info' $selected{'GUARDIAN_LOGLEVEL'}{'info'}>$Lang::tr{'guardian loglevel_info'}</option>
 544                                         <option id='loglevel_debug' value='debug' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>$Lang::tr{'guardian loglevel_debug'}</option>
 545                                 </select></td>
 546                         </tr>
 547
 548                         <tr class="GUARDIAN_LOGFILE">
 549                                 <td colspan='2'><br></td>
 550                         </tr>
 551
 552                         <tr class="GUARDIAN_LOGFILE">
 553                                 <td width='25%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 554                                 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 555                         </tr>
 556
 557                         <tr>
 558                                 <td colspan='2'><br></td>
 559                         </tr>
 560
 561                         <tr>
 562                                 <td width='25%' class='base'>$Lang::tr{'guardian firewallaction'}:</td>
 563                                 <td><select name='GUARDIAN_FIREWALL_ACTION'>
 564                                         <option value='DROP' $selected{'GUARDIAN_FIREWALL_ACTION'}{'DROP'}>Drop</option>
 565                                         <option value='REJECT' $selected{'GUARDIAN_FIREWALL_ACTION'}{'REJECT'}>Reject</option>
 566                                 </select></td>
 567
 568                                 <td width='25%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
 569                                 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
 570                         </tr>
 571
 572                         <tr>
 573                                 <td colspan='2'><br></td>
 574                         </tr>
 575
 576                         <tr>
 577                                 <td width='25%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 578                                 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 579                         </tr>
 580
 581                 </table>
 582 END
 583
 584         print <<END;
 585                 <hr>
 586
 587                 <table width='95%'>
 588                         <tr>
 589                                 <td>&nbsp;</td>
 590                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 591                                 <td>&nbsp;</td>
 592                         </tr>
 593                 </table>
 594         </form>
 595 END
 596
 597         &Header::closebox();
 598 }
 599
 600 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 601 sub showIgnoreBox() {
 602         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 603
 604         print <<END;
 605                 <table width='80%'>
 606                         <tr>
 607                                 <td class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'ip address'}</b></td>
 608                                 <td class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'remark'}</b></td>
 609                                 <td class='base' colspan='3' bgcolor='$color{'color20'}'></td>
 610                         </tr>
 611 END
 612                         # Check if some hosts have been added to be ignored.
 613                         if (keys (%ignored)) {
 614                                 my $col = "";
 615
 616                                 # Loop through all entries of the hash.
 617                                 while( (my $key) = each %ignored)  {
 618                                         # Assign data array positions to some nice variable names.
 619                                         my $address = $ignored{$key}[0];
 620                                         my $remark = $ignored{$key}[1];
 621                                         my $status  = $ignored{$key}[2];
 622
 623                                         # Check if the key (id) number is even or not.
 624                                         if ($settings{'ID'} eq $key) {
 625                                                 $col="bgcolor='${Header::colouryellow}'";
 626                                         } elsif ($key % 2) {
 627                                                 $col="bgcolor='$color{'color22'}'";
 628                                         } else {
 629                                                 $col="bgcolor='$color{'color20'}'";
 630                                         }
 631
 632                                         # Choose icon for the checkbox.
 633                                         my $gif;
 634                                         my $gdesc;
 635
 636                                         # Check if the status is enabled and select the correct image and description.
 637                                         if ($status eq 'enabled' ) {
 638                                                 $gif = 'on.gif';
 639                                                 $gdesc = $Lang::tr{'click to disable'};
 640                                         } else {
 641                                                 $gif = 'off.gif';
 642                                                 $gdesc = $Lang::tr{'click to enable'};
 643                                         }
 644
 645                                         print <<END;
 646                                         <tr>
 647                                                 <td width='20%' class='base' $col>$address</td>
 648                                                 <td width='65%' class='base' $col>$remark</td>
 649
 650                                                 <td align='center' $col>
 651                                                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 652                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'toggle enable disable'}' />
 653                                                                 <input type='image' name='$Lang::tr{'toggle enable disable'}' src='/images/$gif' alt='$gdesc' title='$gdesc' />
 654                                                                 <input type='hidden' name='ID' value='$key' />
 655                                                         </form>
 656                                                 </td>
 657
 658                                                 <td align='center' $col>
 659                                                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 660                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'edit'}' />
 661                                                                 <input type='image' name='$Lang::tr{'edit'}' src='/images/edit.gif' alt='$Lang::tr{'edit'}' title='$Lang::tr{'edit'}' />
 662                                                                 <input type='hidden' name='ID' value='$key' />
 663                                                         </form>
 664                                                 </td>
 665
 666                                                 <td align='center' $col>
 667                                                         <form method='post' name='$key' action='$ENV{'SCRIPT_NAME'}'>
 668                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 669                                                                 <input type='hidden' name='ID' value='$key'>
 670                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 671                                                         </form>
 672                                                 </td>
 673                                         </tr>
 674 END
 675                                 }
 676                         } else {
 677                                 # Print notice that currently no hosts are ignored.
 678                                 print "<tr>\n";
 679                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 680                                 print "</tr>\n";
 681                         }
 682
 683                 print "</table>\n";
 684
 685         # Section to add new elements or edit existing ones.
 686         print <<END;
 687         <br>
 688         <hr>
 689         <br>
 690
 691         <div align='center'>
 692                 <table width='100%'>
 693 END
 694
 695         # Assign correct headline and button text.
 696         my $buttontext;
 697         my $entry_address;
 698         my $entry_remark;
 699
 700         # Check if an ID (key) has been given, in this case an existing entry should be edited.
 701         if ($settings{'ID'} ne '') {
 702                 $buttontext = $Lang::tr{'update'};
 703                 print "<tr><td class='boldbase' colspan='3'><b>$Lang::tr{'update'}</b></td></tr>\n";
 704
 705                 # Grab address and remark for the given key.
 706                 $entry_address = $ignored{$settings{'ID'}}[0];
 707                 $entry_remark = $ignored{$settings{'ID'}}[1];
 708         } else {
 709                 $buttontext = $Lang::tr{'add'};
 710                 print "<tr><td class='boldbase' colspan='3'><b>$Lang::tr{'dnsforward add a new entry'}</b></td></tr>\n";
 711         }
 712
 713         print <<END;
 714                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 715                         <input type='hidden' name='ID' value='$settings{'ID'}'>
 716                         <tr>
 717                                 <td width='30%'>$Lang::tr{'ip address'}: </td>
 718                                 <td width='50%'><input type='text' name='IGNORE_ENTRY_ADDRESS' value='$entry_address' size='24' /></td>
 719
 720                                 <td width='30%'>$Lang::tr{'remark'}: </td>
 721                                 <td wicth='50%'><input type='text' name=IGNORE_ENTRY_REMARK value='$entry_remark' size='24' /></td>
 722                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$buttontext' /></td>
 723                         </tr>
 724                         </form>
 725                 </table>
 726         </div>
 727 END
 728
 729         &Header::closebox();
 730 }
 731
 732 # Function to list currently blocked addresses from guardian and unblock them or add custom entries to block.
 733 sub showBlockedBox() {
 734         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 735
 736         print <<END;
 737         <table width='60%'>
 738                 <tr>
 739                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 740                 </tr>
 741 END
 742
 743                 # Launch function to get the currently blocked hosts.
 744                 my @blocked_hosts = &GetBlockedHosts();
 745
 746                 my $id = 0;
 747                 my $col = "";
 748
 749                 # Loop through our blocked hosts array.
 750                 foreach my $blocked_host (@blocked_hosts) {
 751
 752                         # Increase id number for each element in the ignore file.
 753                         $id++;
 754
 755                         # Check if the id number is even or not.
 756                         if ($id % 2) {
 757                                 $col="bgcolor='$color{'color22'}'";
 758                         } else {
 759                                 $col="bgcolor='$color{'color20'}'";
 760                         }
 761
 762                         print <<END;
 763                         <tr>
 764                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 765                                 <td width='20%' align='center' $col>
 766                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 767                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 768                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 769                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 770                                         </form>
 771                                 </td>
 772                         </tr>
 773 END
 774                 }
 775
 776         # If the loop only has been run once the id still is "0", which means there are no
 777         # additional entries (blocked hosts) in the iptables chain.
 778         if ($id == 0) {
 779
 780                 # Print notice that currently no hosts are blocked.
 781                 print "<tr>\n";
 782                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 783                 print "</tr>\n";
 784         }
 785
 786         print "</table>\n";
 787
 788         # Section for a manual block of an IP-address.
 789         print <<END;
 790         <br>
 791         <div align='center'>
 792                 <table width='60%' border='0'>
 793                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 794                         <tr>
 795                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 796                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 797                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 798                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 799                         </tr>
 800                         </form>
 801                 </table>
 802         </div>
 803 END
 804
 805         &Header::closebox();
 806 }
 807
 808 &Header::closebigbox();
 809 &Header::closepage();
 810
 811 # Function to check if guardian has been started.
 812 # Grab process id and consumed memory if the daemon is running.
 813 sub daemonstats() {
 814         $memory = 0;
 815         # for pid and memory
 816         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 817         @guardian = <FILE>;
 818         close(FILE);
 819         $string = join("", @guardian);
 820         $string =~ s/[a-z_]//gi;
 821         $string =~ s/\[[0-1]\;[0-9]+//gi;
 822         $string =~ s/[\(\)\.]//gi;
 823         $string =~ s/  //gi;
 824         $string =~ s/\e//gi;
 825         @pid = split(/\s/,$string);
 826         if (open(FILE, "/proc/$pid[0]/statm")){
 827                 my $temp = <FILE>;
 828                 @memory = split(/ /,$temp);
 829                 close(FILE);
 830         }
 831         $memory+=$memory[0];
 832 }
 833
 834 sub GetBlockedHosts() {
 835         # Create new, empty array.
 836         my @hosts;
 837
 838         # Launch helper to get chains from iptables.
 839         system('/usr/local/bin/getipstat');
 840
 841         # Open temporary file which contains the chains and rules.
 842         open (FILE, '/var/tmp/iptables.txt');
 843
 844         # Loop through the entire file.
 845         while (<FILE>) {
 846                 my $line = $_;
 847
 848                 # Search for the guardian chain and extract
 849                 # the lines between it and the next empty line
 850                 # which is placed before the next firewall
 851                 # chain starts.
 852                 if ($line =~ /^Chain GUARDIAN/ .. /^\s*$/) {
 853                         # Skip descriptive lines.
 854                         next if ($line =~ /^Chain/);
 855                         next if ($line =~ /^ pkts/);
 856
 857                         # Generate array, based on the line content (separator is a single or multiple space)
 858                         my @comps = split(/\s{1,}/, $line);
 859                         my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 860
 861                         # Assign different variable names.
 862                         my $blocked_host = $source;
 863
 864                         # Add host to our hosts array.
 865                         if ($blocked_host) {
 866                                 push(@hosts, $blocked_host);
 867                         }
 868                 }
 869         }
 870
 871         # Close filehandle.
 872         close(FILE);
 873
 874         # Remove recently created temporary files of the "getipstat" binary.
 875         system("rm -f /var/tmp/iptables.txt");
 876         system("rm -f /var/tmp/iptablesmangle.txt");
 877         system("rm -f /var/tmp/iptablesnat.txt");
 878
 879         # Convert entries, sort them, write back and store the sorted entries into new array.
 880         my @sorted = map  { $_->[0] }
 881              sort { $a->[1] <=> $b->[1] }
 882              map  { [$_, int sprintf("%03.f%03.f%03.f%03.f", split(/\./, $_))] }
 883              @hosts;
 884
 885         # Return our sorted list.
 886         return @sorted
 887 }
 888
 889 sub BuildConfiguration() {
 890         my %settings = ();
 891         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 892
 893         my $configfile = "${General::swroot}/guardian/guardian.conf";
 894
 895         # Create the configfile if none exists yet.
 896         unless (-e "$configfile") { system("touch $configfile"); }
 897
 898         # Open configfile for writing.
 899         open(FILE, ">$configfile");
 900
 901         # Config file header.
 902         print FILE "# Autogenerated configuration file.\n";
 903         print FILE "# All user modifications will be overwritten.\n\n";
 904
 905         # Settings for the logging mechanism.
 906         print FILE "# Log settings.\n";
 907         print FILE "LogFacility = $settings{'GUARDIAN_LOG_FACILITY'}\n";
 908
 909         if ($settings{'GUARDIAN_LOG_FACILITY'} eq "file") {
 910                 print FILE "LogFile = $settings{'GUARDIAN_LOGFILE'}\n";
 911         }
 912
 913         print FILE "LogLevel = $settings{'GUARDIAN_LOGLEVEL'}\n\n";
 914
 915         # IPFire related static settings.
 916         print FILE "# IPFire related settings.\n";
 917         print FILE "FirewallEngine = IPtables\n";
 918         print FILE "SocketOwner = nobody:nobody\n";
 919         print FILE "IgnoreFile = $ignorefile\n\n";
 920
 921         # Configured block values.
 922         print FILE "# Configured block settings.\n";
 923         print FILE "BlockCount = $settings{'GUARDIAN_BLOCKCOUNT'}\n";
 924         print FILE "BlockTime = $settings{'GUARDIAN_BLOCKTIME'}\n";
 925         print FILE "FirewallAction = $settings{'GUARDIAN_FIREWALL_ACTION'}\n\n";
 926
 927         # Enabled modules.
 928         # Loop through whole settings hash.
 929         print FILE "# Enabled modules.\n";
 930         foreach my $option (keys %settings) {
 931                 # Search for enabled modules.
 932                 if ($option =~ /GUARDIAN_MONITOR_(.*)/) {
 933                         # Skip if module is not enabled.
 934                         next unless($settings{$option} eq "on");
 935
 936                         # Skip module if no file location is available.
 937                         next unless(exists($module_file_locations{$1}));
 938
 939                         # Add enabled module and defined path to the config file.
 940                         print FILE "Monitor_$1 = $module_file_locations{$1}\n";
 941                 }
 942         }
 943
 944         # Module settings.
 945         print FILE "\n# Module settings.\n";
 946         close(FILE);
 947
 948         # Generate ignore file.
 949         &GenerateIgnoreFile();
 950
 951         # Check if guardian should be started or stopped.
 952         if($settings{'GUARDIAN_ENABLED'} eq 'on') {
 953                 if($pid > 0) {
 954                         # Send reload command through socket connection.
 955                         &Guardian::Socket::Client("reload");
 956                 } else {
 957                         # Launch guardian.
 958                         system("/usr/local/bin/addonctrl guardian start &>/dev/null");
 959                 }
 960         } else {
 961                 # Stop the daemon.
 962                 system("/usr/local/bin/addonctrl guardian stop &>/dev/null");
 963         }
 964 }
 965
 966 sub GenerateIgnoreFile() {
 967         my %ignored = ();
 968
 969         # Read-in ignoredfile.
 970         &General::readhasharray($ignoredfile, \%ignored);
 971
 972         # Create the guardian.ignore file if not exist yet.
 973         unless (-e "$ignorefile") { system("touch $ignorefile"); }
 974
 975         # Open ignorefile for writing.
 976         open(FILE, ">$ignorefile");
 977
 978         # Config file header.
 979         print FILE "# Autogenerated configuration file.\n";
 980         print FILE "# All user modifications will be overwritten.\n\n";
 981
 982         # Add IFPire interfaces and gateway to the ignore file.
 983         #
 984         # Assign some temporary variables for the IPFire interfaces.
 985         my $green = $netsettings{'GREEN_ADDRESS'};
 986         my $blue = $netsettings{'BLUE_ADDRESS'};
 987         my $orange = $netsettings{'ORANGE_ADDRESS'};
 988
 989         # File declarations.
 990         my $public_address_file = "${General::swroot}/red/local-ipaddress";
 991         my $gatewayfile = "${General::swroot}/red/remote-ipaddress";
 992         my $dns1file = "${General::swroot}/red/dns1";
 993         my $dns2file = "${General::swroot}/red/dns2";
 994
 995         # Write the obtained addresses to the ignore file.
 996         print FILE "# IPFire local interfaces.\n";
 997         print FILE "$green\n";
 998
 999         # Check if a blue interface exists.
1000         if ($blue) {
1001                 # Add blue address.
1002                 print FILE "$blue\n";
1003         }
1004
1005         # Check if an orange interface exists.
1006         if ($orange) {
1007                 # Add orange address.
1008                 print FILE "$orange\n";
1009         }
1010
1011         print FILE "\n# IPFire red interface, gateway and used DNS-servers.\n";
1012         print FILE "# Include the corresponding files to obtain the addresses.\n";
1013         print FILE "Include_File = $public_address_file\n";
1014         print FILE "Include_File = $gatewayfile\n";
1015         print FILE "Include_File = $dns1file\n";
1016         print FILE "Include_File = $dns2file\n";
1017
1018         # Add all user defined hosts and networks to the ignore file.
1019         #
1020         # Check if the hash contains any elements.
1021         if (keys (%ignored)) {
1022                 # Write headline.
1023                 print FILE "\n# User defined hosts/networks.\n";
1024
1025                 # Loop through the entire hash and write the host/network
1026                 # and remark to the ignore file.
1027                 while ( (my $key) = each %ignored) {
1028                         my $address = $ignored{$key}[0];
1029                         my $remark = $ignored{$key}[1];
1030                         my $status = $ignored{$key}[2];
1031
1032                         # Check if the status of the entry is "enabled".
1033                         if ($status eq "enabled") {
1034                                 # Check if the address/network is valid.
1035                                 if ((&General::validip($address)) || (&General::validipandmask($address))) {
1036                                         # Write the remark to the file.
1037                                         print FILE "# $remark\n";
1038
1039                                         # Write the address/network to the ignore file.
1040                                         print FILE "$address\n\n";
1041                                 }
1042                         }
1043                 }
1044         }
1045
1046         close(FILE);
1047 }
1048
1049 # Private subfunction to obtain IP-addresses from given file names.
1050 #
1051 sub _get_address_from_file ($) {
1052         my $file = shift;
1053
1054         # Check if the file exists.
1055         if (-e $file) {
1056                 # Open the given file.
1057                 open(FILE, "$file") or die "Could not open $file.";
1058
1059                 # Obtain the address from the first line of the file.
1060                 my $address = <FILE>;
1061
1062                 # Close filehandle
1063                 close(FILE);
1064
1065                 # Remove newlines.
1066                 chomp $address;
1067
1068                 # Check if the grabbed address is valid.
1069                 if (&General::validip($address)) {
1070                         # Return the address.
1071                         return $address;
1072                 }
1073         }
1074
1075         # Return nothing.
1076         return;
1077 }