html/cgi-bin/ids.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2015  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
  24 # enable only the following on debugging purpose
  25 #use warnings;
  26 #use CGI::Carp 'fatalsToBrowser';
  27 use File::Copy;
  28
  29 require '/var/ipfire/general-functions.pl';
  30 require "${General::swroot}/lang.pl";
  31 require "${General::swroot}/header.pl";
  32
  33 my %color = ();
  34 my %mainsettings = ();
  35 my %netsettings = ();
  36 my %snortsettings=();
  37 my %cgiparams=();
  38 my %checked=();
  39 my %selected=();
  40
  41 # Read-in main settings, for language, theme and colors.
  42 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  43 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  44
  45 # Get netsettings.
  46 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  47
  48 &Header::showhttpheaders();
  49
  50 # Default settings for snort.
  51 $snortsettings{'ENABLE_SNORT'} = 'off';
  52 $snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
  53 $snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
  54 $snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
  55 $snortsettings{'ACTION'} = '';
  56 $snortsettings{'RULES'} = '';
  57 $snortsettings{'OINKCODE'} = '';
  58 $snortsettings{'INSTALLDATE'} = '';
  59
  60 #Get GUI values
  61 &Header::getcgihash(\%cgiparams);
  62
  63 my $snortrulepath = "/etc/snort/rules";
  64 my $snortusedrulefilesfile = "${General::swroot}/snort/snort-used-rulefiles.conf";
  65 my $restartsnortrequired = 0;
  66 my %snortrules;
  67 my $errormessage;
  68 my $url;
  69
  70 # Try to determine if oinkmaster is running.
  71 my $oinkmaster_pid = `pidof oinkmaster.pl -x`;
  72
  73 # If oinkmaster is running display output.
  74 if ($oinkmaster_pid) {
  75         &working("$Lang::tr{'snort working'}");
  76 }
  77
  78 ## Grab all available snort rules and store them in the snortrules hash.
  79 #
  80 # Open snort rules directory and do a directory listing.
  81 opendir(DIR, $snortrulepath) or die $!;
  82         # Loop through the direcory.
  83         while (my $file = readdir(DIR)) {
  84
  85                 # We only want files.
  86                 next unless (-f "$snortrulepath/$file");
  87
  88                 # Ignore empty files.
  89                 next if (-z "$snortrulepath/$file");
  90
  91                 # Use a regular expression to find files ending in .rules
  92                 next unless ($file =~ m/\.rules$/);
  93
  94                 # Ignore files which are not read-able.
  95                 next unless (-R "$snortrulepath/$file");
  96
  97                 # Call subfunction to read-in rulefile and add rules to
  98                 # the snortrules hash.
  99                 &readrulesfile("$file");
 100         }
 101
 102 closedir(DIR);
 103
 104 # Gather used rulefiles.
 105 #
 106 # Check if the file for activated rulefiles is not empty.
 107 if(-f $snortusedrulefilesfile) {
 108         # Open the file for used rulefile and read-in content.
 109         open(FILE, $snortusedrulefilesfile) or die "Could not open $snortusedrulefilesfile. $!\n";
 110
 111         # Read-in content.
 112         my @lines = <FILE>;
 113
 114         # Close file.
 115         close(FILE);
 116
 117         # Loop through the array.
 118         foreach my $line (@lines) {
 119                 # Remove newlines.
 120                 chomp($line);
 121
 122                 # Skip comments.
 123                 next if ($line =~ /\#/);
 124
 125                 # Skip blank  lines.
 126                 next if ($line =~ /^\s*$/);
 127
 128                 # Gather rule sid and message from the ruleline.
 129                 if ($line =~ /.*include \$RULE_PATH\/(.*)/) {
 130                         my $rulefile = $1;
 131
 132                         # Add the rulefile to the %snortrules hash.
 133                         $snortrules{$rulefile}{'Rulefile'}{'State'} = "on";
 134                 }
 135         }
 136 }
 137
 138 # Save ruleset.
 139 if ($cgiparams{'RULESET'} eq $Lang::tr{'update'}) {
 140         my $enabled_sids_file = "${General::swroot}/snort/oinkmaster-enabled-sids.conf";
 141         my $disabled_sids_file = "${General::swroot}/snort/oinkmaster-disabled-sids.conf";
 142
 143         # Arrays to store sid which should be added to the corresponding files.
 144         my @enabled_sids;
 145         my @disabled_sids;
 146         my @enabled_rulefiles;
 147
 148         # Loop through the hash of snortrules.
 149         foreach my $rulefile(keys %snortrules) {
 150                 # Check if the rulefile is enabled.
 151                 if ($cgiparams{$rulefile} eq "on") {
 152                         # Add rulefile to the array of enabled rulefiles.
 153                         push(@enabled_rulefiles, $rulefile);
 154
 155                         # Drop item from cgiparams hash.
 156                         delete $cgiparams{$rulefile};
 157                 }
 158         }
 159
 160         # Loop through the hash of snortrules.
 161         foreach my $rulefile (keys %snortrules) {
 162                 # Loop through the single rules of the rulefile.
 163                 foreach my $sid (keys %{$snortrules{$rulefile}}) {
 164                         # Skip the current sid if it is not numeric.
 165                         next unless ($sid =~ /\d+/ );
 166
 167                         # Check if there exists a key in the cgiparams hash for this sid.
 168                         if (exists($cgiparams{$sid})) {
 169                                 # Look if the rule is disabled.
 170                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "off") {
 171                                         # Check if the state has been set to 'on'.
 172                                         if ($cgiparams{$sid} eq "on") {
 173                                                 # Add the sid to the enabled_sids array.
 174                                                 push(@enabled_sids, $sid);
 175
 176                                                 # Drop item from cgiparams hash.
 177                                                 delete $cgiparams{$rulefile}{$sid};
 178                                         }
 179                                 }
 180                         } else {
 181                                 # Look if the rule is enabled.
 182                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "on") {
 183                                         # Check if the state is 'on' and should be disabled.
 184                                         # In this case there is no entry
 185                                         # for the sid in the cgiparams hash.
 186                                         # Add it to the disabled_sids array.
 187                                         push(@disabled_sids, $sid);
 188
 189                                         # Drop item from cgiparams hash.
 190                                         delete $cgiparams{$rulefile}{$sid};
 191                                 }
 192                         }
 193                 }
 194         }
 195
 196         # Open enabled sid's file for writing.
 197         open(FILE, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
 198
 199         # Write header to file.
 200         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 201
 202         # Check if the enabled_sids array contains any sid's.
 203         if (@enabled_sids) {
 204                 # Loop through the array of enabled sids and write them to the file.
 205                 foreach my $sid (@enabled_sids) {
 206                         print FILE "enablesid $sid\n";
 207                 }
 208         }
 209
 210         # Close file after writing.
 211         close(FILE);
 212
 213         # Open disabled sid's file for writing.
 214         open(FILE, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
 215
 216         # Write header to file.
 217         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 218
 219         # Check if the enabled_sids array contains any sid's.
 220         if (@disabled_sids) {
 221                 # Loop through the array of disabled sids and write them to the file.
 222                 foreach my $sid (@disabled_sids) {
 223                         print FILE "disablesid $sid\n";
 224                 }
 225         }
 226
 227         # Close file after writing.
 228         close(FILE);
 229
 230         # Open file for used rulefiles.
 231         open (FILE, ">$snortusedrulefilesfile") or die "Could not write to $snortusedrulefilesfile. $!\n";
 232
 233         # Write header to file.
 234         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 235
 236         # Check if the enabled_rulefiles array contains any entries.
 237         if (@enabled_rulefiles) {
 238                 # Loop through the array of rulefiles which should be loaded and write the to the file.
 239                 foreach my $file (@enabled_rulefiles) {
 240                         print FILE "include \$RULE_PATH/$file\n";
 241                 }
 242         }
 243
 244         # Close file after writing.
 245         close(FILE);
 246
 247         # Call oinkmaster to alter the ruleset.
 248         &oinkmaster();
 249
 250 # Download new ruleset.
 251 } elsif ($cgiparams{'RULESET'} eq $Lang::tr{'download new ruleset'}) {
 252         # Local var.
 253         my $return;
 254
 255         # Call diskfree to gather the free disk space of /var.
 256         my @df = `/bin/df -B M /var`;
 257
 258         # Loop through the output.
 259         foreach my $line (@df) {
 260                 # Ignore header line.
 261                 next if $line =~ m/^Filesystem/;
 262
 263                 # Search for a line with the device information.
 264                 if ($line =~ m/dev/ ) {
 265                         # Split the line into single pieces.
 266                         my @values = split(' ', $line);
 267                         my ($filesystem, $blocks, $used, $available, $used_perenctage, $mounted_on) = @values;
 268
 269                         # Check if the available disk space is more than 300MB.
 270                         if ($available < 300) {
 271                                 # If there is not enough space, print out an error message.
 272                                 $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
 273                         } else {
 274                                 # Call subfunction to download the ruleset.
 275                                 &downloadrulesfile();
 276
 277                                 # Sleep for 3 seconds.
 278                                 sleep(3);
 279
 280                                 # Gather return of the external wget.
 281                                 $return = `cat /var/tmp/log 2>/dev/null`;
 282                         }
 283
 284                         # Check if there was an error.
 285                         if ($return =~ "ERROR") {
 286                                 # Store error message for display.
 287                                 $errormessage = "<br /><pre>".$return."</pre>";
 288                         } else {
 289                                 # Remove logfile.
 290                                 unlink("/var/tmp/log");
 291
 292                                 # Call subfunction to launch oinkmaster.
 293                                 &oinkmaster();
 294
 295                                 # Sleep for 2 seconds.
 296                                 sleep(2);
 297                         }
 298                 }
 299         }
 300 }
 301
 302
 303 if ($snortsettings{'OINKCODE'} ne "") {
 304         $errormessage = $Lang::tr{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
 305 }
 306
 307 if (!$errormessage) {
 308         if ($snortsettings{'RULES'} eq 'subscripted') {
 309                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 310         } elsif ($snortsettings{'RULES'} eq 'registered') {
 311                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 312         } elsif ($snortsettings{'RULES'} eq 'community') {
 313                 $url=" https://www.snort.org/rules/community";
 314         } else {
 315                 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
 316         }
 317
 318         if ($snortsettings{'ACTION'} eq $Lang::tr{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
 319                 &General::writehash("${General::swroot}/snort/settings", \%snortsettings);
 320                 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
 321                 {
 322                         system ('/usr/bin/touch', "${General::swroot}/snort/enable");
 323                 } else {
 324                         unlink "${General::swroot}/snort/enable";
 325                 }
 326                 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
 327                 {
 328                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
 329                 } else {
 330                         unlink "${General::swroot}/snort/enable_green";
 331                 }
 332                 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
 333                 {
 334                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
 335                 } else {
 336                         unlink "${General::swroot}/snort/enable_blue";
 337                 }
 338                 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
 339                 {
 340                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
 341                 } else {
 342                         unlink "${General::swroot}/snort/enable_orange";
 343                 }
 344                 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
 345                 {
 346                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
 347                 } else {
 348                         unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
 349                 }
 350
 351                 system('/usr/local/bin/snortctrl restart >/dev/null');
 352         }
 353 }
 354
 355 # Read-in snortsettings
 356 &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 357
 358 $checked{'ENABLE_SNORT'}{'off'} = '';
 359 $checked{'ENABLE_SNORT'}{'on'} = '';
 360 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 361 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 362 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 363 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 364 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 365 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 366 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 367 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 368 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 369 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 370 $selected{'RULES'}{'nothing'} = '';
 371 $selected{'RULES'}{'community'} = '';
 372 $selected{'RULES'}{'emerging'} = '';
 373 $selected{'RULES'}{'registered'} = '';
 374 $selected{'RULES'}{'subscripted'} = '';
 375 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 376
 377 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 378
 379 ### Java Script ###
 380 print <<END
 381 <script>
 382         // Tiny java script function to show/hide the rules
 383         // of a given category.
 384         function showhide(tblname) {
 385                 \$("#" + tblname).toggle();
 386         }
 387 </script>
 388 END
 389 ;
 390
 391 &Header::openbigbox('100%', 'left', '', $errormessage);
 392
 393 if ($errormessage) {
 394         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 395         print "<class name='base'>$errormessage\n";
 396         print "&nbsp;</class>\n";
 397         &Header::closebox();
 398 }
 399
 400 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 401 print <<END
 402 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 403 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 404 END
 405 ;
 406 if ($netsettings{'BLUE_DEV'} ne '') {
 407   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 408 }
 409 if ($netsettings{'ORANGE_DEV'} ne '') {
 410   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 411 }
 412   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 413
 414 print <<END
 415 </td></tr>
 416 <tr>
 417         <td><br><br></td>
 418 </tr>
 419 <tr>
 420         <td><b>$Lang::tr{'ids rules update'}</b></td>
 421 </tr>
 422 <tr>
 423         <td><select name='RULES'>
 424                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 425                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 426                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 427                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 428                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 429                         </select>
 430         </td>
 431 </tr>
 432 <tr>
 433         <td><br />
 434                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 435                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 436         </td>
 437 </tr>
 438 <tr>
 439         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 440 </tr>
 441 <tr>
 442         <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
 443 END
 444 ;
 445 if ( -e "/var/tmp/snortrules.tar.gz"){
 446         my @Info = stat("/var/tmp/snortrules.tar.gz");
 447         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 448 }
 449 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 450
 451 print <<END
 452 </tr>
 453 </table>
 454 <br><br>
 455 <table width='100%'>
 456 <tr>
 457         <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 458 </tr>
 459 </table>
 460 </form>
 461 END
 462 ;
 463
 464 &Header::closebox();
 465
 466 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 467         print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
 468
 469         # Output display table for rule files
 470         print "<table width='100%'>\n";
 471
 472         # Local variable required for java script to show/hide
 473         # rules of a rulefile.
 474         my $rulesetcount = 1;
 475
 476         # Loop over each rule file
 477         foreach my $rulefile (sort keys(%snortrules)) {
 478                 my $rulechecked = '';
 479
 480                 # Check if rule file is enabled
 481                 if ($snortrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
 482                         $rulechecked = 'CHECKED';
 483                 }
 484
 485                 # Table and rows for the rule files.
 486                 print"<tr>\n";
 487                 print"<td class='base' width='5%'>\n";
 488                 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
 489                 print"</td>\n";
 490                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 491                 print"<td class='base' width='5%' align='right'>\n";
 492                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 493                 print"</td>\n";
 494                 print"</tr>\n";
 495
 496                 # Rows which will be hidden per default and will contain the single rules.
 497                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 498                 print"<td colspan='3'>\n";
 499
 500                 # Local vars
 501                 my $lines;
 502                 my $rows;
 503                 my $col;
 504
 505                 # New table for the single rules.
 506                 print "<table width='100%'>\n";
 507
 508                 # Loop over rule file rules
 509                 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
 510                         # Local vars
 511                         my $ruledefchecked = '';
 512
 513                         # Skip rulefile itself.
 514                         next if ($sid eq "Rulefile");
 515
 516                         # If 2 rules have been displayed, start a new row
 517                         if (($lines % 2) == 0) {
 518                                 print "</tr><tr>\n";
 519
 520                                 # Increase rows by once.
 521                                 $rows++;
 522                         }
 523
 524                         # Colour lines.
 525                         if ($rows % 2) {
 526                                 $col="bgcolor='$color{'color20'}'";
 527                         } else {
 528                                 $col="bgcolor='$color{'color22'}'";
 529                         }
 530
 531                         # Set rule state
 532                         if ($snortrules{$rulefile}{$sid}{'State'} eq 'on') {
 533                                 $ruledefchecked = 'CHECKED';
 534                         }
 535
 536                         # Create rule checkbox and display rule description
 537                         print "<td class='base' width='5%' align='right' $col>\n";
 538                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 539                         print "</td>\n";
 540                         print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
 541
 542                         # Increment rule count
 543                         $lines++;
 544                 }
 545
 546                 # If do not have a second rule for row, create empty cell
 547                 if (($lines % 2) != 0) {
 548                         print "<td class='base'></td>";
 549                 }
 550
 551                 # Close display table
 552                 print "</tr></table></td></tr>";
 553
 554                 # Finished whith the rule file, increase count.
 555                 $rulesetcount++;
 556         }
 557
 558         # Close display table
 559         print "</table>";
 560
 561 print <<END
 562 <table width='100%'>
 563 <tr>
 564         <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
 565                 &nbsp; <!-- space for future online help link -->
 566         </td>
 567 </tr>
 568 </table>
 569 </form>
 570 END
 571 ;
 572 &Header::closebox();
 573 &Header::closebigbox();
 574 &Header::closepage();
 575
 576 sub working ($) {
 577         my $message = $_[0];
 578
 579         &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 580         &Header::openbigbox('100%', 'left', '', $errormessage);
 581         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1'>" );
 582         print <<END;
 583         <table>
 584                 <tr>
 585                         <td><img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' /></td>
 586                         <td>$message</td>
 587                 </tr>
 588                 <tr>
 589                         <td colspan='2' align='center'>
 590                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 591                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 592                         </form>
 593                 </tr>
 594         </table>
 595 END
 596         &Header::closebox();
 597         &Header::closebigbox();
 598         &Header::closepage();
 599         exit;
 600 }
 601
 602 sub downloadrulesfile {
 603         my $peer;
 604         my $peerport;
 605
 606         unlink("/var/tmp/log");
 607
 608         unless (-e "${General::swroot}/red/active") {
 609                 $errormessage = $Lang::tr{'could not download latest updates'};
 610                 return undef;
 611         }
 612
 613         my %proxysettings=();
 614         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 615
 616         if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 617                 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 618         }
 619
 620         if ($peer) {
 621                 system("wget -r --proxy=on --proxy-user=$proxysettings{'UPSTREAM_USER'} --proxy-passwd=$proxysettings{'UPSTREAM_PASSWORD'} -e http_proxy=http://$peer:$peerport/ -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 622         } else {
 623                 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 624         }
 625 }
 626
 627 sub oinkmaster () {
 628         # Call oinkmaster to generate ruleset.
 629         system("/usr/local/bin/oinkmaster.pl -v -s -u file:///var/tmp/snortrules.tar.gz -C /var/ipfire/snort/oinkmaster.conf -o /etc/snort/rules >>/var/tmp/log 2>&1 &");
 630 }
 631
 632 sub readrulesfile ($) {
 633         my $rulefile = shift;
 634
 635         # Open rule file and read in contents
 636         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 637
 638         # Store file content in an array.
 639         my @lines = <RULEFILE>;
 640
 641         # Close file.
 642         close(RULEFILE);
 643
 644         # Loop over rule file contents
 645         foreach my $line (@lines) {
 646                 # Remove whitespaces.
 647                 chomp $line;
 648
 649                 # Skip blank  lines.
 650                 next if ($line =~ /^\s*$/);
 651
 652                 # Local vars.
 653                 my $sid;
 654                 my $msg;
 655
 656                 # Gather rule sid and message from the ruleline.
 657                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 658                         $msg = $1;
 659                         $sid = $2;
 660
 661                         # Check if a rule has been found.
 662                         if ($sid && $msg) {
 663                                 # Add rule to the snortrules hash.
 664                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 665
 666                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 667                                 if ($line =~ /^\#/) {
 668                                         # If yes, the rule is disabled.
 669                                         $snortrules{$rulefile}{$sid}{'State'} = "off";
 670                                 } else {
 671                                         # Otherwise the rule is enabled.
 672                                         $snortrules{$rulefile}{$sid}{'State'} = "on";
 673                                 }
 674                         }
 675                 }
 676         }
 677 }