html/cgi-bin/connections.cgi

   1 #!/usr/bin/perl
   2 #
   3 # (c) 2001 Jack Beglinger <jackb_guppy@yahoo.com>
   4 #
   5 # (c) 2003 Dave Roberts <countzerouk@hotmail.com> - colour coded netfilter/iptables rewrite for 1.3
   6 #
   7 # (c) 2006 Franck - add sorting+filtering capability
   8 #
   9 # $Id: connections.cgi,v 1.6.2.12 2006/02/27 19:48:46 franck78 Exp $
  10 #
  11
  12 # Setup GREEN, ORANGE, IPCOP, VPN CIDR networks, masklengths and colours only once
  13
  14 my @network=();
  15 my @masklen=();
  16 my @colour=();
  17
  18 use Net::IPv4Addr qw( :all );
  19
  20 use strict;
  21
  22 # enable only the following on debugging purpose
  23 #use warnings;
  24 #use CGI::Carp 'fatalsToBrowser';
  25
  26 require 'CONFIG_ROOT/general-functions.pl';
  27 require "${General::swroot}/lang.pl";
  28 require "${General::swroot}/header.pl";
  29
  30 #workaround to suppress a warning when a variable is used only once
  31 my @dummy = ( ${Header::table1colour} );
  32 undef (@dummy);
  33
  34 # Read various files
  35
  36 my %netsettings=();
  37 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  38
  39 open (ACTIVE, "/proc/net/ip_conntrack") or die 'Unable to open ip_conntrack';
  40 my @active = <ACTIVE>;
  41 close (ACTIVE);
  42
  43 my @vpn = ('none');
  44 open (ACTIVE, "/proc/net/ipsec_eroute") and @vpn = <ACTIVE>;
  45 close (ACTIVE);
  46
  47 my $aliasfile = "${General::swroot}/ethernet/aliases";
  48 open(ALIASES, $aliasfile) or die 'Unable to open aliases file.';
  49 my @aliases = <ALIASES>;
  50 close(ALIASES);
  51
  52 # Add Green Firewall Interface
  53 push(@network, $netsettings{'GREEN_ADDRESS'});
  54 push(@masklen, "255.255.255.255" );
  55 push(@colour, ${Header::colourfw} );
  56
  57 # Add Green Network to Array
  58 push(@network, $netsettings{'GREEN_NETADDRESS'});
  59 push(@masklen, $netsettings{'GREEN_NETMASK'} );
  60 push(@colour, ${Header::colourgreen} );
  61
  62 # Add Green Routes to Array
  63 my @routes = `/sbin/route -n | /bin/grep $netsettings{'GREEN_DEV'}`;
  64 foreach my $route (@routes) {
  65         chomp($route);
  66         my @temp = split(/[\t ]+/, $route);
  67         push(@network, $temp[0]);
  68         push(@masklen, $temp[2]);
  69         push(@colour, ${Header::colourgreen} );
  70 }
  71
  72 # Add Firewall Localhost 127.0.0.1
  73 push(@network, '127.0.0.1');
  74 push(@masklen, '255.255.255.255' );
  75 push(@colour, ${Header::colourfw} );
  76
  77 # Add Orange Network
  78 if ($netsettings{'ORANGE_DEV'}) {
  79         push(@network, $netsettings{'ORANGE_NETADDRESS'});
  80         push(@masklen, $netsettings{'ORANGE_NETMASK'} );
  81         push(@colour, ${Header::colourorange} );
  82         # Add Orange Routes to Array
  83         @routes = `/sbin/route -n | /bin/grep $netsettings{'ORANGE_DEV'}`;
  84         foreach my $route (@routes) {
  85                 chomp($route);
  86                 my @temp = split(/[\t ]+/, $route);
  87                 push(@network, $temp[0]);
  88                 push(@masklen, $temp[2]);
  89                 push(@colour, ${Header::colourorange} );
  90         }
  91 }
  92
  93 # Add Blue Network
  94 if ($netsettings{'BLUE_DEV'}) {
  95         push(@network, $netsettings{'BLUE_NETADDRESS'});
  96         push(@masklen, $netsettings{'BLUE_NETMASK'} );
  97         push(@colour, ${Header::colourblue} );
  98         # Add Blue Routes to Array
  99         @routes = `/sbin/route -n | /bin/grep $netsettings{'BLUE_DEV'}`;
 100         foreach my $route (@routes) {
 101                 chomp($route);
 102                 my @temp = split(/[\t ]+/, $route);
 103                 push(@network, $temp[0]);
 104                 push(@masklen, $temp[2]);
 105                 push(@colour, ${Header::colourblue} );
 106         }
 107 }
 108
 109 # Add STATIC RED aliases
 110 if ($netsettings{'RED_DEV'}) {
 111         # We have a RED eth iface
 112         if ($netsettings{'RED_TYPE'} eq 'STATIC') {
 113                 # We have a STATIC RED eth iface
 114                 foreach my $line (@aliases)
 115                 {
 116                         chomp($line);
 117                         my @temp = split(/\,/,$line);
 118                         if ( $temp[0] ) {
 119                                 push(@network, $temp[0]);
 120                                 push(@masklen, $netsettings{'RED_NETMASK'} );
 121                                 push(@colour, ${Header::colourfw} );
 122                         }
 123                 }
 124         }
 125 }
 126
 127 # Add VPNs
 128 if ( $vpn[0] ne 'none' ) {
 129         foreach my $line (@vpn) {
 130                 my @temp = split(/[\t ]+/,$line);
 131                 my @temp1 = split(/[\/:]+/,$temp[3]);
 132                 push(@network, $temp1[0]);
 133                 push(@masklen, ipv4_cidr2msk($temp1[1]));
 134                 push(@colour, ${Header::colourvpn} );
 135         }
 136 }
 137 if (open(IP, "${General::swroot}/red/local-ipaddress")) {
 138         my $redip = <IP>;
 139         close(IP);
 140         chomp $redip;
 141         push(@network, $redip);
 142         push(@masklen, '255.255.255.255' );
 143         push(@colour, ${Header::colourfw} );
 144 }
 145
 146
 147 #Establish simple filtering&sorting boxes on top of table
 148
 149 our %cgiparams;
 150 &Header::getcgihash(\%cgiparams);
 151
 152 my @list_proto = ($Lang::tr{'all'}, 'icmp', 'udp', 'tcp');
 153 my @list_state = ($Lang::tr{'all'}, 'SYN_SENT', 'SYN_RECV', 'ESTABLISHED', 'FIN_WAIT',
 154                     'CLOSE_WAIT', 'LAST_ACK', 'TIME_WAIT', 'CLOSE', 'LISTEN');
 155 my @list_mark = ($Lang::tr{'all'}, '[ASSURED]', '[UNREPLIED]');
 156 my @list_sort = ('orgsip','protocol', 'expires', 'status', 'orgdip', 'orgsp',
 157                     'orgdp', 'exsip', 'exdip', 'exsp', 'exdp');
 158
 159 # init or silently correct unknown value...
 160 if ( ! grep ( /^$cgiparams{'SEE_PROTO'}$/ , @list_proto )) { $cgiparams{'SEE_PROTO'} = $list_proto[0] };
 161 if ( ! grep ( /^$cgiparams{'SEE_STATE'}$/ , @list_state )) { $cgiparams{'SEE_STATE'} = $list_state[0] };
 162 if ( ! grep ( /^$cgiparams{'SEE_MARK'}$/  , @list_mark ))  { $cgiparams{'SEE_MARK'}  = $list_mark[0] };
 163 if ( ! grep ( /^$cgiparams{'SEE_SORT'}$/  , @list_sort ))  { $cgiparams{'SEE_SORT'}  = $list_sort[0] };
 164 # *.*.*.* or a valid IP
 165 if ( $cgiparams{'SEE_SRC'}  !~ /^(\*\.\*\.\*\.\*\.|\d+\.\d+\.\d+\.\d+)$/) {  $cgiparams{'SEE_SRC'} = '*.*.*.*' };
 166 if ( $cgiparams{'SEE_DEST'} !~ /^(\*\.\*\.\*\.\*\.|\d+\.\d+\.\d+\.\d+)$/) {  $cgiparams{'SEE_DEST'} = '*.*.*.*' };
 167
 168
 169 our %entries = ();      # will hold the lines analyzed correctly
 170 my $unknownlines = '';  # should be empty all the time...
 171 my $index = 0;          # just a counter to make unique entryies in entries
 172
 173 foreach my $line (@active) {
 174         my $protocol='';
 175         my $expires='';
 176         my $status='';
 177         my $orgsip='';
 178         my $orgdip='';
 179         my $orgsp='';
 180         my $orgdp='';
 181         my $exsip='';
 182         my $exdip='';
 183         my $exsp='';
 184         my $exdp='';
 185         my $marked='';
 186         my $use='';
 187
 188         chomp($line);
 189         my @temp = split(' ',$line);
 190
 191         if ($temp[0] eq 'icmp') {
 192                 $protocol  = $temp[0];
 193                 $status    = $Lang::tr{'all'};
 194                 $orgsip   = substr $temp[3], 4;
 195                 $orgdip   = substr $temp[4], 4;
 196                 $marked   = $temp[8] eq '[UNREPLIED]' ? '[UNREPLIED]' : ' ';
 197         }
 198         if ($temp[0] eq 'udp') {
 199                 $protocol  = $temp[0];
 200                 $status  = $Lang::tr{'all'};
 201                 $orgsip = substr $temp[3], 4;
 202                 $orgdip  = substr $temp[4], 4;
 203                 $marked   = $temp[7] eq '[UNREPLIED]' ? '[UNREPLIED]' : defined ($temp[12]) ? $temp[11] : ' ';
 204         }
 205         if ($temp[0] eq 'tcp') {
 206                 $protocol  = $temp[0];
 207                 $status  = $temp[3];
 208                 $orgsip = substr $temp[4], 4;
 209                 $orgdip   = substr $temp[5], 4;
 210                 $marked   = $temp[8] eq '[UNREPLIED]' ? '[UNREPLIED]' : defined ($temp[13]) ? $temp[12] : ' ';
 211         }
 212
 213         # filter the line if we found a known proto
 214         next if( !(
 215                    (($cgiparams{'SEE_PROTO'}  eq $Lang::tr{'all'}) || ($protocol  eq $cgiparams{'SEE_PROTO'} ))
 216                 && (($cgiparams{'SEE_STATE'}  eq $Lang::tr{'all'}) || ($status    eq $cgiparams{'SEE_STATE'} ))
 217                 && (($cgiparams{'SEE_MARK'}   eq $Lang::tr{'all'}) || ($marked    eq $cgiparams{'SEE_MARK'}  ))
 218                 && (($cgiparams{'SEE_SRC'}    eq "*.*.*.*")        || ($orgsip    eq $cgiparams{'SEE_SRC'}   ))
 219                 && (($cgiparams{'SEE_DEST'}   eq "*.*.*.*")        || ($orgdip    eq $cgiparams{'SEE_DEST'}  ))
 220                 ));
 221
 222         if ($temp[0] eq 'icmp') {
 223                 my $offset = 0;
 224                 $protocol = $temp[0] . " (" . $temp[1] . ")";
 225                 $expires = $temp[2];
 226                 $status = ' ';
 227                 if ($temp[8] eq '[UNREPLIED]' ) {
 228                         $offset = +1;
 229                 }
 230                 $orgsip = substr $temp[3], 4;
 231                 $orgdip = substr $temp[4], 4;
 232                 $orgsp = &General::GetIcmpDescription(substr( $temp[5], 5)) . "/" . substr( $temp[6], 5);;
 233                 $orgdp = 'id=' . substr( $temp[7], 3);
 234                 $exsip = substr $temp[8 + $offset], 4;
 235                 $exdip = substr $temp[9 + $offset], 4;
 236                 $exsp = &General::GetIcmpDescription(substr( $temp[10 + $offset], 5)). "/" . substr( $temp[11 + $offset], 5);
 237                 $exdp = 'id=' . substr( $temp[11 + $offset], 5);
 238                 $marked   = $temp[8] eq '[UNREPLIED]' ? '[UNREPLIED]' : ' ';
 239                 $use = substr( $temp[13 + $offset], 4 );
 240         }
 241         if ($temp[0] eq 'udp') {
 242                 my $offset = 0;
 243                 $marked = '';
 244                 $protocol = $temp[0] . " (" . $temp[1] . ")";
 245                 $expires = $temp[2];
 246                 $status = ' ';
 247                 $orgsip = substr $temp[3], 4;
 248                 $orgdip = substr $temp[4], 4;
 249                 $orgsp = substr $temp[5], 6;
 250                 $orgdp = substr $temp[6], 6;
 251                 if ($temp[7] eq '[UNREPLIED]') {
 252                     $offset = 1;
 253                     $marked = $temp[7];
 254                     $use = substr $temp[12], 4;
 255                 } else {
 256                     if ((substr $temp[11], 0, 3) eq 'use' ) {
 257                         $marked = '';
 258                         $use = substr $temp[11], 4;
 259                     } else {
 260                         $marked = $temp[11];
 261                         $use = substr $temp[12], 4;
 262                     }
 263                 }
 264                 $exsip = substr $temp[7 + $offset], 4;
 265                 $exdip = substr $temp[8 + $offset], 4;
 266                 $exsp = substr $temp[9 + $offset], 6;
 267                 $exdp = substr $temp[10 + $offset], 6;
 268         }
 269         if ($temp[0] eq 'tcp') {
 270                 my $offset = 0;
 271                 $protocol = $temp[0] . " (" . $temp[1] . ")";
 272                 $expires = $temp[2];
 273                 $status = $temp[3];
 274                 $orgsip = substr $temp[4], 4;
 275                 $orgdip = substr $temp[5], 4;
 276                 $orgsp = substr $temp[6], 6;
 277                 $orgdp = substr $temp[7], 6;
 278                 if ($temp[8] eq '[UNREPLIED]') {
 279                         $marked = $temp[8];
 280                         $offset = 1;
 281                 } else {
 282                         $marked = $temp[12];
 283                 }
 284                 $exsip = substr $temp[8 + $offset], 4;
 285                 $exdip = substr $temp[9 + $offset], 4;
 286                 $exsp = substr $temp[10 + $offset], 6;
 287                 $exdp = substr $temp[11 + $offset], 6;
 288                 $use = substr $temp[13], 4;
 289         }
 290         if ($temp[0] eq 'unknown') {
 291                 my $offset = 0;
 292                 $protocol = "??? (" . $temp[1] . ")";
 293                 $protocol = "esp (" . $temp[1] . ")" if ($temp[1] == 50);
 294                 $protocol = "ah (" . $temp[1] . ")" if ($temp[1] == 51);
 295                 $expires = $temp[2];
 296                 $status = ' ';
 297                 $orgsip = substr $temp[3], 4;
 298                 $orgdip = substr $temp[4], 4;
 299                 $orgsp = ' ';
 300                 $orgdp = ' ';
 301                 $exsip = substr $temp[5], 4;
 302                 $exdip = substr $temp[6], 4;
 303                 $exsp = ' ';
 304                 $exdp = ' ';
 305                 $marked = ' ';
 306                 $use = ' ';
 307         }
 308         if ($temp[0] eq 'gre') {
 309                 my $offset = 0;
 310                 $protocol = $temp[0] . " (" . $temp[1] . ")";
 311                 $expires = $temp[2];
 312                 $orgsip = substr $temp[5], 4;
 313                 $orgdip = substr $temp[6], 4;
 314                 $orgsp = ' ';
 315                 $orgdp = ' ';
 316                 $exsip = substr $temp[11], 4;
 317                 $exdip = substr $temp[12], 4;
 318                 $exsp = ' ';
 319                 $exdp = ' ';
 320                 $marked = $temp[17];
 321                 $use = $temp[18];
 322         }
 323         # Only from this point, lines have the same known format/field
 324         # The floating fields [UNREPLIED] [ASSURED] etc are ok.
 325
 326         # Store the line in a hash array for sorting
 327         if ( $protocol ) { # line is decoded ?
 328                 my @record = (  'index', $index++,
 329                             'protocol', $protocol,
 330                             'expires',  $expires,
 331                             'status',   $status,
 332                             'orgsip',   $orgsip,
 333                             'orgdip',   $orgdip,
 334                             'orgsp',    $orgsp,
 335                             'orgdp',    $orgdp,
 336                             'exsip',    $exsip,
 337                             'exdip',    $exdip,
 338                             'exsp',     $exsp,
 339                             'exdp',     $exdp,
 340                             'marked',   $marked,
 341                             'use',      $use);
 342                 my $record = {};                                # create a reference to empty hash
 343                 %{$record} = @record;                   # populate that hash with @record
 344                 $entries{$record->{index}} = $record;   # add this to a hash of hashes
 345         } else { # it was not a known line
 346                 $unknownlines .= "<tr bgcolor='${Header::table1colour}'>";
 347                 $unknownlines .= "<td colspan='9'> unknown:$line></td></tr>";
 348         }
 349 }
 350
 351 # Build listbox objects
 352 my $menu_proto = &make_select ('SEE_PROTO', $cgiparams{'SEE_PROTO'}, @list_proto);
 353 my $menu_state = &make_select ('SEE_STATE', $cgiparams{'SEE_STATE'}, @list_state);
 354 my $menu_src   = &make_select ('SEE_SRC',   $cgiparams{'SEE_SRC'},   &get_known_ips('orgsip'));
 355 my $menu_dest  = &make_select ('SEE_DEST',  $cgiparams{'SEE_DEST'},  &get_known_ips('orgdip'));
 356 my $menu_mark  = &make_select ('SEE_MARK',  $cgiparams{'SEE_MARK'},  @list_mark);
 357 my $menu_sort  = &make_select ('SEE_SORT',  $cgiparams{'SEE_SORT'},  @list_sort);
 358
 359 &Header::showhttpheaders();
 360 &Header::openpage($Lang::tr{'connections'}, 1, '');
 361 &Header::openbigbox('100%', 'left');
 362 &Header::openbox('100%', 'left', $Lang::tr{'connection tracking'});
 363
 364 print <<END
 365 <table width='60%'>
 366 <tr><td align='center'><b>$Lang::tr{'legend'} : </b></td>
 367     <td align='center' bgcolor='${Header::colourgreen}'><b><font color='#FFFFFF'>$Lang::tr{'lan'}</font></b></td>
 368     <td align='center' bgcolor='${Header::colourred}'><b><font color='#FFFFFF'>$Lang::tr{'internet'}</font></b></td>
 369     <td align='center' bgcolor='${Header::colourorange}'><b><font color='#FFFFFF'>$Lang::tr{'dmz'}</font></b></td>
 370     <td align='center' bgcolor='${Header::colourblue}'><b><font color='#FFFFFF'>$Lang::tr{'wireless'}</font></b></td>
 371     <td align='center' bgcolor='${Header::colourfw}'><b><font color='#FFFFFF'>IPCop</font></b></td>
 372     <td align='center' bgcolor='${Header::colourvpn}'><b><font color='#FFFFFF'>$Lang::tr{'vpn'}</font></b></td>
 373 </tr>
 374 </table>
 375 <br />
 376 <table cellpadding='2'>
 377 <tr><td align='center'><b>$Lang::tr{'protocol'}</b></td>
 378     <td align='center'><b>$Lang::tr{'expires'}<br />($Lang::tr{'seconds'})</b></td>
 379     <td align='center'><b>$Lang::tr{'connection'}<br />$Lang::tr{'status'}</b></td>
 380     <td align='center'><b>$Lang::tr{'original'}<br />$Lang::tr{'source ip and port'}</b></td>
 381     <td align='center'><b>$Lang::tr{'original'}<br />$Lang::tr{'dest ip and port'}</b></td>
 382     <td align='center'><b>$Lang::tr{'expected'}<br />$Lang::tr{'source ip and port'}</b></td>
 383     <td align='center'><b>$Lang::tr{'expected'}<br />$Lang::tr{'dest ip and port'}</b></td>
 384     <td align='center'><b>$Lang::tr{'marked'}</b></td>
 385     <td align='center'><b>$Lang::tr{'use'}</b></td>
 386 </tr>
 387 <tr><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 388     <td align='center'>$menu_proto</td>
 389     <td></td>
 390     <td align='center'>$menu_state</td>
 391     <td align='center'>$menu_src</td>
 392     <td align='center'>$menu_dest</td>
 393     <td align='center'colspan='2'>$Lang::tr{'sort ascending'}:$menu_sort </td>
 394     <td align='center'>$menu_mark</td>
 395     <td align='center'><input type='submit' value='!' /></td>
 396     </form>
 397 </tr>
 398 END
 399 ;
 400
 401 foreach my $entry (sort sort_entries keys %entries) {
 402
 403         print "<tr bgcolor='${Header::table1colour}'>";
 404         my $orgsipcolour = &ipcolour( $entries{$entry}->{orgsip} );
 405         my $orgdipcolour = &ipcolour( $entries{$entry}->{orgdip} );
 406         my $exsipcolour  = &ipcolour( $entries{$entry}->{exsip} );
 407         my $exdipcolour  = &ipcolour( $entries{$entry}->{exdip} );
 408         print <<END
 409         <td align='center'>$entries{$entry}->{protocol}</td>
 410         <td align='center'>$entries{$entry}->{expires}</td>
 411         <td align='center'>$entries{$entry}->{status}</td>
 412         <td align='center' bgcolor='$orgsipcolour'>
 413             <a href='/cgi-bin/ipinfo.cgi?ip=$entries{$entry}->{orgsip}'>
 414             <font color='#FFFFFF'>$entries{$entry}->{orgsip}</font>
 415             </a><font color='#FFFFFF'>:$entries{$entry}->{orgsp}</font></td>
 416         <td align='center' bgcolor='$orgdipcolour'>
 417             <a href='/cgi-bin/ipinfo.cgi?ip=$entries{$entry}->{orgdip}'>
 418             <font color='#FFFFFF'>$entries{$entry}->{orgdip}</font>
 419             </a><font color='#FFFFFF'>:$entries{$entry}->{orgdp}</font></td>
 420         <td align='center' bgcolor='$exsipcolour'>
 421             <a href='/cgi-bin/ipinfo.cgi?ip=$entries{$entry}->{exsip}'>
 422             <font color='#FFFFFF'>$entries{$entry}->{exsip}</font>
 423             </a><font color='#FFFFFF'>:$entries{$entry}->{exsp}</font></td>
 424         <td align='center' bgcolor='$exdipcolour'>
 425             <a href='/cgi-bin/ipinfo.cgi?ip=$entries{$entry}->{exdip}'>
 426             <font color='#FFFFFF'>$entries{$entry}->{exdip}</font>
 427             </a><font color='#FFFFFF'>:$entries{$entry}->{exdp}</font></td>
 428         <td align='center'>$entries{$entry}->{marked}</td>
 429         <td align='center'>$entries{$entry}->{use}</td>
 430         </tr>
 431 END
 432 ;
 433 }
 434
 435 print "$unknownlines</table>";
 436
 437 &Header::closebox();
 438 &Header::closebigbox();
 439 &Header::closepage();
 440
 441 sub ipcolour($) {
 442         my $id = 0;
 443         my $line;
 444         my $colour = ${Header::colourred};
 445         my ($ip) = $_[0];
 446         my $found = 0;
 447         foreach $line (@network) {
 448                 if (!$found && ipv4_in_network( $network[$id] , $masklen[$id], $ip) ) {
 449                         $found = 1;
 450                         $colour = $colour[$id];
 451                 }
 452                 $id++;
 453         }
 454         return $colour
 455 }
 456
 457 # Create a string containing a complete SELECT html object
 458 # param1: name
 459 # param2: current value selected
 460 # param3: field list
 461 sub make_select ($,$,$) {
 462         my $select_name = shift;
 463         my $selected    = shift;
 464         my $select = "<select name='$select_name'>";
 465
 466         foreach my $value (@_) {
 467                 my $check = $selected eq $value ? "selected='selected'" : '';
 468                 $select .= "<option $check value='$value'>$value";
 469         }
 470         $select .= "</select>";
 471         return $select;
 472 }
 473
 474 # Build a list of IP obtained from the %entries hash
 475 # param1: IP field name
 476 sub get_known_ips ($) {
 477         my $field = shift;
 478         my $qs = $cgiparams{'SEE_SORT'};        # switch the sort order
 479         $cgiparams{'SEE_SORT'} = $field;
 480
 481         my @liste=('*.*.*.*');
 482         foreach my $entry ( sort sort_entries keys %entries) {
 483                 push (@liste, $entries{$entry}->{$field}) if (! grep (/^$entries{$entry}->{$field}$/,@liste) );
 484         }
 485
 486         $cgiparams{'SEE_SORT'} = $qs;   #restore sort order
 487         return @liste;
 488 }
 489
 490 # Used to sort the table containing the lines displayed.
 491 sub sort_entries { #Reverse is not implemented
 492         my $qs=$cgiparams{'SEE_SORT'};
 493         if ($qs =~ /orgsip|orgdip|exsip|exdip/) {
 494                 my @a = split(/\./,$entries{$a}->{$qs});
 495                 my @b = split(/\./,$entries{$b}->{$qs});
 496                 ($a[0]<=>$b[0]) ||
 497                 ($a[1]<=>$b[1]) ||
 498                 ($a[2]<=>$b[2]) ||
 499                 ($a[3]<=>$b[3]);
 500         } elsif ($qs =~ /expire|orgsp|orgdp|exsp|exdp/) {
 501                 $entries{$a}->{$qs} <=> $entries{$b}->{$qs};
 502         } else {
 503                 $entries{$a}->{$qs} cmp $entries{$b}->{$qs};
 504         }
 505 }
 506
 507 1;