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 ## Grab all available snort rules and store them in the snortrules hash.
  71 #
  72 # Open snort rules directory and do a directory listing.
  73 opendir(DIR, $snortrulepath) or die $!;
  74         # Loop through the direcory.
  75         while (my $file = readdir(DIR)) {
  76
  77                 # We only want files.
  78                 next unless (-f "$snortrulepath/$file");
  79
  80                 # Ignore empty files.
  81                 next if (-z "$snortrulepath/$file");
  82
  83                 # Use a regular expression to find files ending in .rules
  84                 next unless ($file =~ m/\.rules$/);
  85
  86                 # Ignore files which are not read-able.
  87                 next unless (-R "$snortrulepath/$file");
  88
  89                 # Call subfunction to read-in rulefile and add rules to
  90                 # the snortrules hash.
  91                 &readrulesfile("$file");
  92         }
  93
  94 closedir(DIR);
  95
  96 # Gather used rulefiles.
  97 #
  98 # Check if the file for activated rulefiles is not empty.
  99 if(-f $snortusedrulefilesfile) {
 100         # Open the file for used rulefile and read-in content.
 101         open(FILE, $snortusedrulefilesfile) or die "Could not open $snortusedrulefilesfile. $!\n";
 102
 103         # Read-in content.
 104         my @lines = <FILE>;
 105
 106         # Close file.
 107         close(FILE);
 108
 109         # Loop through the array.
 110         foreach my $line (@lines) {
 111                 # Remove newlines.
 112                 chomp($line);
 113
 114                 # Skip comments.
 115                 next if ($line =~ /\#/);
 116
 117                 # Skip blank  lines.
 118                 next if ($line =~ /^\s*$/);
 119
 120                 # Gather rule sid and message from the ruleline.
 121                 if ($line =~ /.*include \$RULE_PATH\/(.*)/) {
 122                         my $rulefile = $1;
 123
 124                         # Add the rulefile to the %snortrules hash.
 125                         $snortrules{$rulefile}{'Rulefile'}{'State'} = "on";
 126                 }
 127         }
 128 }
 129
 130 # Save ruleset.
 131 if ($cgiparams{'RULESET'} eq $Lang::tr{'update'}) {
 132         my $enabled_sids_file = "${General::swroot}/snort/oinkmaster-enabled-sids.conf";
 133         my $disabled_sids_file = "${General::swroot}/snort/oinkmaster-disabled-sids.conf";
 134
 135         # Arrays to store sid which should be added to the corresponding files.
 136         my @enabled_sids;
 137         my @disabled_sids;
 138         my @enabled_rulefiles;
 139
 140         # Loop through the hash of snortrules.
 141         foreach my $rulefile(keys %snortrules) {
 142                 # Check if the rulefile is enabled.
 143                 if ($cgiparams{$rulefile} eq "on") {
 144                         # Add rulefile to the array of enabled rulefiles.
 145                         push(@enabled_rulefiles, $rulefile);
 146
 147                         # Drop item from cgiparams hash.
 148                         delete $cgiparams{$rulefile};
 149                 }
 150         }
 151
 152         # Loop through the hash of snortrules.
 153         foreach my $rulefile (keys %snortrules) {
 154                 # Loop through the single rules of the rulefile.
 155                 foreach my $sid (keys %{$snortrules{$rulefile}}) {
 156                         # Check if there exists a key in the cgiparams hash for this sid.
 157                         if (exists($cgiparams{$sid})) {
 158                                 # Look if the rule is disabled.
 159                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "off") {
 160                                         # Check if the state has been set to 'on'.
 161                                         if ($cgiparams{$sid} eq "on") {
 162                                                 # Add the sid to the enabled_sids array.
 163                                                 push(@enabled_sids, $sid);
 164
 165                                                 # Drop item from cgiparams hash.
 166                                                 delete $cgiparams{$rulefile}{$sid};
 167                                         }
 168                                 }
 169                         } else {
 170                                 # Look if the rule is enabled.
 171                                 if ($snortrules{$rulefile}{$sid}{'State'} eq "on") {
 172                                         # Check if the state is 'on' and should be disabled.
 173                                         # In this case there is no entry
 174                                         # for the sid in the cgiparams hash.
 175                                         # Add it to the disabled_sids array.
 176                                         push(@disabled_sids, $sid);
 177
 178                                         # Drop item from cgiparams hash.
 179                                         delete $cgiparams{$rulefile}{$sid};
 180                                 }
 181                         }
 182                 }
 183         }
 184
 185         # Open enabled sid's file for writing.
 186         open(FILE, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
 187
 188         # Write header to file.
 189         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 190
 191         # Check if the enabled_sids array contains any sid's.
 192         if (@enabled_sids) {
 193                 # Loop through the array of enabled sids and write them to the file.
 194                 foreach my $sid (@enabled_sids) {
 195                         print FILE "enablesid $sid\n";
 196                 }
 197         }
 198
 199         # Close file after writing.
 200         close(FILE);
 201
 202         # Open disabled sid's file for writing.
 203         open(FILE, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
 204
 205         # Write header to file.
 206         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 207
 208         # Check if the enabled_sids array contains any sid's.
 209         if (@disabled_sids) {
 210                 # Loop through the array of disabled sids and write them to the file.
 211                 foreach my $sid (@disabled_sids) {
 212                         print FILE "disablesid $sid\n";
 213                 }
 214         }
 215
 216         # Close file after writing.
 217         close(FILE);
 218
 219         # Open file for used rulefiles.
 220         open (FILE, ">$snortusedrulefilesfile") or die "Could not write to $snortusedrulefilesfile. $!\n";
 221
 222         # Write header to file.
 223         print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
 224
 225         # Check if the enabled_rulefiles array contains any entries.
 226         if (@enabled_rulefiles) {
 227                 # Loop through the array of rulefiles which should be loaded and write the to the file.
 228                 foreach my $file (@enabled_rulefiles) {
 229                         print FILE "include \$RULE_PATH/$file\n";
 230                 }
 231         }
 232
 233         # Close file after writing.
 234         close(FILE);
 235 }
 236
 237 if ($snortsettings{'OINKCODE'} ne "") {
 238         $errormessage = $Lang::tr{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
 239 }
 240
 241 if (!$errormessage) {
 242         if ($snortsettings{'RULES'} eq 'subscripted') {
 243                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 244         } elsif ($snortsettings{'RULES'} eq 'registered') {
 245                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 246         } elsif ($snortsettings{'RULES'} eq 'community') {
 247                 $url=" https://www.snort.org/rules/community";
 248         } else {
 249                 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
 250         }
 251
 252         if ($snortsettings{'ACTION'} eq $Lang::tr{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
 253                 &General::writehash("${General::swroot}/snort/settings", \%snortsettings);
 254                 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
 255                 {
 256                         system ('/usr/bin/touch', "${General::swroot}/snort/enable");
 257                 } else {
 258                         unlink "${General::swroot}/snort/enable";
 259                 }
 260                 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
 261                 {
 262                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
 263                 } else {
 264                         unlink "${General::swroot}/snort/enable_green";
 265                 }
 266                 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
 267                 {
 268                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
 269                 } else {
 270                         unlink "${General::swroot}/snort/enable_blue";
 271                 }
 272                 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
 273                 {
 274                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
 275                 } else {
 276                         unlink "${General::swroot}/snort/enable_orange";
 277                 }
 278                 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
 279                 {
 280                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
 281                 } else {
 282                         unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
 283                 }
 284
 285                 system('/usr/local/bin/snortctrl restart >/dev/null');
 286         }
 287
 288         # INSTALLMD5 is not in the form, so not retrieved by getcgihash
 289         &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 290
 291         if ($snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 292                 my @df = `/bin/df -B M /var`;
 293                 foreach my $line (@df) {
 294                         next if $line =~ m/^Filesystem/;
 295                         my $return;
 296
 297                         if ($line =~ m/dev/ ) {
 298                                 $line =~ m/^.* (\d+)M.*$/;
 299                                 my @temp = split(/ +/,$line);
 300                                 if ($1<300) {
 301                                         $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
 302                                 } else {
 303                                         if ( $snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 304                                                 &downloadrulesfile();
 305                                                 sleep(3);
 306                                                 $return = `cat /var/tmp/log 2>/dev/null`;
 307
 308                                         }
 309
 310                                         if ($return =~ "ERROR") {
 311                                                 $errormessage = "<br /><pre>".$return."</pre>";
 312                                         } else {
 313                                                 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 &");
 314                                                 sleep(2);
 315                                         }
 316                                 }
 317                         }
 318                 }
 319         }
 320 }
 321
 322 $checked{'ENABLE_SNORT'}{'off'} = '';
 323 $checked{'ENABLE_SNORT'}{'on'} = '';
 324 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 325 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 326 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 327 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 328 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 329 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 330 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 331 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 332 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 333 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 334 $selected{'RULES'}{'nothing'} = '';
 335 $selected{'RULES'}{'community'} = '';
 336 $selected{'RULES'}{'emerging'} = '';
 337 $selected{'RULES'}{'registered'} = '';
 338 $selected{'RULES'}{'subscripted'} = '';
 339 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 340
 341 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 342
 343 ### Java Script ###
 344 print <<END
 345 <script>
 346         // Tiny java script function to show/hide the rules
 347         // of a given category.
 348         function showhide(tblname) {
 349                 \$("#" + tblname).toggle();
 350         }
 351 </script>
 352 END
 353 ;
 354
 355 &Header::openbigbox('100%', 'left', '', $errormessage);
 356
 357 ###############
 358 # DEBUG DEBUG
 359 # &Header::openbox('100%', 'left', 'DEBUG');
 360 # my $debugCount = 0;
 361 # foreach my $line (sort keys %snortsettings) {
 362 # print "$line = $snortsettings{$line}<br />\n";
 363 # $debugCount++;
 364 # }
 365 # print "&nbsp;Count: $debugCount\n";
 366 # &Header::closebox();
 367 # DEBUG DEBUG
 368 ###############
 369
 370 if ($errormessage) {
 371         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 372         print "<class name='base'>$errormessage\n";
 373         print "&nbsp;</class>\n";
 374         &Header::closebox();
 375 }
 376
 377 my $return = `pidof oinkmaster.pl -x`;
 378 chomp($return);
 379 if ($return) {
 380         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
 381         print <<END;
 382         <table>
 383                 <tr><td>
 384                                 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />&nbsp;
 385                         <td>
 386                                 $Lang::tr{'snort working'}
 387                 <tr><td colspan='2' align='center'>
 388                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 389                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 390                         </form>
 391                 <tr><td colspan='2' align='left'><pre>
 392 END
 393         my @output = `tail -20 /var/tmp/log`;
 394         foreach (@output) {
 395                 print "$_";
 396         }
 397         print <<END;
 398                         </pre>
 399                 </table>
 400 END
 401         &Header::closebox();
 402         &Header::closebigbox();
 403         &Header::closepage();
 404         exit;
 405         refreshpage();
 406 }
 407
 408 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 409 print <<END
 410 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 411 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 412 END
 413 ;
 414 if ($netsettings{'BLUE_DEV'} ne '') {
 415   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 416 }
 417 if ($netsettings{'ORANGE_DEV'} ne '') {
 418   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 419 }
 420   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 421
 422 print <<END
 423 </td></tr>
 424 <tr>
 425         <td><br><br></td>
 426 </tr>
 427 <tr>
 428         <td><b>$Lang::tr{'ids rules update'}</b></td>
 429 </tr>
 430 <tr>
 431         <td><select name='RULES'>
 432                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 433                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 434                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 435                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 436                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 437                         </select>
 438         </td>
 439 </tr>
 440 <tr>
 441         <td><br />
 442                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 443                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 444         </td>
 445 </tr>
 446 <tr>
 447         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 448 </tr>
 449 <tr>
 450         <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
 451 END
 452 ;
 453 if ( -e "/var/tmp/snortrules.tar.gz"){
 454         my @Info = stat("/var/tmp/snortrules.tar.gz");
 455         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 456 }
 457 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 458
 459 print <<END
 460 </tr>
 461 </table>
 462 <br><br>
 463 <table width='100%'>
 464 <tr>
 465         <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 466 </tr>
 467 </table>
 468 </form>
 469 END
 470 ;
 471
 472 &Header::closebox();
 473
 474 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 475         print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
 476
 477         # Output display table for rule files
 478         print "<table width='100%'>\n";
 479
 480         # Local variable required for java script to show/hide
 481         # rules of a rulefile.
 482         my $rulesetcount = 1;
 483
 484         # Loop over each rule file
 485         foreach my $rulefile (sort keys(%snortrules)) {
 486                 my $rulechecked = '';
 487
 488                 # Check if rule file is enabled
 489                 if ($snortrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
 490                         $rulechecked = 'CHECKED';
 491                 }
 492
 493                 # Table and rows for the rule files.
 494                 print"<tr>\n";
 495                 print"<td class='base' width='5%'>\n";
 496                 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
 497                 print"</td>\n";
 498                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 499                 print"<td class='base' width='5%' align='right'>\n";
 500                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 501                 print"</td>\n";
 502                 print"</tr>\n";
 503
 504                 # Rows which will be hidden per default and will contain the single rules.
 505                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 506                 print"<td colspan='3'>\n";
 507
 508                 # Local vars
 509                 my $lines;
 510                 my $rows;
 511                 my $col;
 512
 513                 # New table for the single rules.
 514                 print "<table width='100%'>\n";
 515
 516                 # Loop over rule file rules
 517                 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
 518                         # Local vars
 519                         my $ruledefchecked = '';
 520
 521                         # Skip rulefile itself.
 522                         next if ($sid eq "Rulefile");
 523
 524                         # If 2 rules have been displayed, start a new row
 525                         if (($lines % 2) == 0) {
 526                                 print "</tr><tr>\n";
 527
 528                                 # Increase rows by once.
 529                                 $rows++;
 530                         }
 531
 532                         # Colour lines.
 533                         if ($rows % 2) {
 534                                 $col="bgcolor='$color{'color20'}'";
 535                         } else {
 536                                 $col="bgcolor='$color{'color22'}'";
 537                         }
 538
 539                         # Set rule state
 540                         if ($snortrules{$rulefile}{$sid}{'State'} eq 'on') {
 541                                 $ruledefchecked = 'CHECKED';
 542                         }
 543
 544                         # Create rule checkbox and display rule description
 545                         print "<td class='base' width='5%' align='right' $col>\n";
 546                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 547                         print "</td>\n";
 548                         print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
 549
 550                         # Increment rule count
 551                         $lines++;
 552                 }
 553
 554                 # If do not have a second rule for row, create empty cell
 555                 if (($lines % 2) != 0) {
 556                         print "<td class='base'></td>";
 557                 }
 558
 559                 # Close display table
 560                 print "</tr></table></td></tr>";
 561
 562                 # Finished whith the rule file, increase count.
 563                 $rulesetcount++;
 564         }
 565
 566         # Close display table
 567         print "</table>";
 568
 569 print <<END
 570 <table width='100%'>
 571 <tr>
 572         <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
 573                 &nbsp; <!-- space for future online help link -->
 574         </td>
 575 </tr>
 576 </table>
 577 </form>
 578 END
 579 ;
 580 &Header::closebox();
 581
 582 &Header::closebigbox();
 583 &Header::closepage();
 584
 585 sub refreshpage {
 586         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
 587                 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
 588         &Header::closebox();
 589 }
 590
 591 sub downloadrulesfile {
 592         my $peer;
 593         my $peerport;
 594
 595         unlink("/var/tmp/log");
 596
 597         unless (-e "${General::swroot}/red/active") {
 598                 $errormessage = $Lang::tr{'could not download latest updates'};
 599                 return undef;
 600         }
 601
 602         my %proxysettings=();
 603         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 604
 605         if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 606                 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 607         }
 608
 609         if ($peer) {
 610                 system("wget -r --proxy=on --proxy-user=$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");
 611         } else {
 612                 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 613         }
 614 }
 615
 616 sub readrulesfile ($) {
 617         my $rulefile = shift;
 618
 619         # Open rule file and read in contents
 620         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 621
 622         # Store file content in an array.
 623         my @lines = <RULEFILE>;
 624
 625         # Close file.
 626         close(RULEFILE);
 627
 628         # Loop over rule file contents
 629         foreach my $line (@lines) {
 630                 # Remove whitespaces.
 631                 chomp $line;
 632
 633                 # Skip blank  lines.
 634                 next if ($line =~ /^\s*$/);
 635
 636                 # Local vars.
 637                 my $sid;
 638                 my $msg;
 639
 640                 # Gather rule sid and message from the ruleline.
 641                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 642                         $msg = $1;
 643                         $sid = $2;
 644
 645                         # Check if a rule has been found.
 646                         if ($sid && $msg) {
 647                                 # Add rule to the snortrules hash.
 648                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 649
 650                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 651                                 if ($line =~ /^\#/) {
 652                                         # If yes, the rule is disabled.
 653                                         $snortrules{$rulefile}{$sid}{'State'} = "off";
 654                                 } else {
 655                                         # Otherwise the rule is enabled.
 656                                         $snortrules{$rulefile}{$sid}{'State'} = "on";
 657                                 }
 658                         }
 659                 }
 660         }
 661 }