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