html/cgi-bin/connections.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2012  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 use Net::IPv4Addr qw( :all );
  25 use Switch;
  26
  27 # enable only the following on debugging purpose
  28 #use warnings;
  29 #use CGI::Carp 'fatalsToBrowser';
  30
  31 require '/var/ipfire/general-functions.pl';
  32 require "${General::swroot}/lang.pl";
  33 require "${General::swroot}/header.pl";
  34
  35 my $colour_multicast = "#A0A0A0";
  36
  37 # sort arguments for connection tracking table
  38 # the sort field. eg. 1=src IP, 2=dst IP, 3=src port, 4=dst port
  39 my $SORT_FIELD = 0;
  40 # the sort order. (a)scending orr (d)escending
  41 my $SORT_ORDER = 0;
  42 # cgi query arguments
  43 my %cgiin;
  44 # debug mode
  45 my $debug = 0;
  46
  47 # retrieve query arguments
  48 # note: let a-z A-Z and 0-9 pass as value only
  49 if (length ($ENV{'QUERY_STRING'}) > 0){
  50         my $name;
  51         my $value;
  52         my $buffer = $ENV{'QUERY_STRING'};
  53         my @pairs = split(/&/, $buffer);
  54         foreach my $pair (@pairs){
  55                 ($name, $value) = split(/=/, $pair);
  56                 $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; # e.g. "%20" => " "
  57                 $value =~ s/[^a-zA-Z0-9]*//g; # a-Z 0-9 will pass
  58                 $cgiin{$name} = $value;
  59         }
  60 }
  61
  62 &Header::showhttpheaders();
  63
  64 my @network=();
  65 my @masklen=();
  66 my @colour=();
  67
  68 my %netsettings=();
  69 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  70
  71 # output cgi query arrguments to browser on debug
  72 if ( $debug ){
  73         &Header::openbox('100%', 'center', 'DEBUG');
  74         my $debugCount = 0;
  75         foreach my $line (sort keys %cgiin) {
  76                 print "$line = '$cgiin{$line}'<br />\n";
  77                 $debugCount++;
  78         }
  79         print "&nbsp;Count: $debugCount\n";
  80         &Header::closebox();
  81 }
  82
  83 #workaround to suppress a warning when a variable is used only once
  84 my @dummy = ( ${Header::table1colour} );
  85 undef (@dummy);
  86
  87 # check sorting arguments
  88 if ( $cgiin{'sort_field'} ~~ [ '1','2','3','4','5','6','7','8','9' ] ) {
  89         $SORT_FIELD = $cgiin{'sort_field'};
  90
  91         if ( $cgiin{'sort_order'} ~~ [ 'a','d','A','D' ] ) {
  92                 $SORT_ORDER = lc($cgiin{'sort_order'});
  93         }
  94 }
  95
  96 # Read and sort the connection tracking table
  97 # do sorting
  98 if ($SORT_FIELD and $SORT_ORDER) {
  99         # field sorting when sorting arguments are sane
 100         open(CONNTRACK, "/usr/local/bin/getconntracktable | /usr/local/bin/consort.sh $SORT_FIELD $SORT_ORDER |") or die "Unable to read conntrack table";
 101 } else {
 102         # default sorting with no query arguments
 103         open(CONNTRACK, "/usr/local/bin/getconntracktable | sort -k 5,5 --numeric-sort --reverse |") or die "Unable to read conntrack table";
 104 }
 105 my @conntrack = <CONNTRACK>;
 106 close(CONNTRACK);
 107
 108 # Collect data for the @network array.
 109
 110 # Add Firewall Localhost 127.0.0.1
 111 push(@network, '127.0.0.1');
 112 push(@masklen, '255.255.255.255');
 113 push(@colour, ${Header::colourfw});
 114
 115 if (open(IP, "${General::swroot}/red/local-ipaddress")) {
 116         my $redip = <IP>;
 117         close(IP);
 118
 119         chomp $redip;
 120         push(@network, $redip);
 121         push(@masklen, '255.255.255.255');
 122         push(@colour, ${Header::colourfw});
 123 }
 124
 125 # Add STATIC RED aliases
 126 if ($netsettings{'RED_DEV'}) {
 127         my $aliasfile = "${General::swroot}/ethernet/aliases";
 128         open(ALIASES, $aliasfile) or die 'Unable to open aliases file.';
 129         my @aliases = <ALIASES>;
 130         close(ALIASES);
 131
 132         # We have a RED eth iface
 133         if ($netsettings{'RED_TYPE'} eq 'STATIC') {
 134                 # We have a STATIC RED eth iface
 135                 foreach my $line (@aliases) {
 136                         chomp($line);
 137                         my @temp = split(/\,/,$line);
 138                         if ($temp[0]) {
 139                                 push(@network, $temp[0]);
 140                                 push(@masklen, $netsettings{'RED_NETMASK'} );
 141                                 push(@colour, ${Header::colourfw} );
 142                         }
 143                 }
 144         }
 145 }
 146
 147 # Add Green Firewall Interface
 148 push(@network, $netsettings{'GREEN_ADDRESS'});
 149 push(@masklen, "255.255.255.255" );
 150 push(@colour, ${Header::colourfw} );
 151
 152 # Add Green Network to Array
 153 push(@network, $netsettings{'GREEN_NETADDRESS'});
 154 push(@masklen, $netsettings{'GREEN_NETMASK'} );
 155 push(@colour, ${Header::colourgreen} );
 156
 157 # Add Green Routes to Array
 158 my @routes = `/sbin/route -n | /bin/grep $netsettings{'GREEN_DEV'}`;
 159 foreach my $route (@routes) {
 160         chomp($route);
 161         my @temp = split(/[\t ]+/, $route);
 162         push(@network, $temp[0]);
 163         push(@masklen, $temp[2]);
 164         push(@colour, ${Header::colourgreen} );
 165 }
 166
 167 # Add Blue Firewall Interface
 168 push(@network, $netsettings{'BLUE_ADDRESS'});
 169 push(@masklen, "255.255.255.255" );
 170 push(@colour, ${Header::colourfw} );
 171
 172 # Add Blue Network
 173 if ($netsettings{'BLUE_DEV'}) {
 174         push(@network, $netsettings{'BLUE_NETADDRESS'});
 175         push(@masklen, $netsettings{'BLUE_NETMASK'} );
 176         push(@colour, ${Header::colourblue} );
 177
 178         # Add Blue Routes to Array
 179         @routes = `/sbin/route -n | /bin/grep $netsettings{'BLUE_DEV'}`;
 180         foreach my $route (@routes) {
 181                 chomp($route);
 182                 my @temp = split(/[\t ]+/, $route);
 183                 push(@network, $temp[0]);
 184                 push(@masklen, $temp[2]);
 185                 push(@colour, ${Header::colourblue} );
 186         }
 187 }
 188
 189 # Add Orange Firewall Interface
 190 push(@network, $netsettings{'ORANGE_ADDRESS'});
 191 push(@masklen, "255.255.255.255" );
 192 push(@colour, ${Header::colourfw} );
 193
 194 # Add Orange Network
 195 if ($netsettings{'ORANGE_DEV'}) {
 196         push(@network, $netsettings{'ORANGE_NETADDRESS'});
 197         push(@masklen, $netsettings{'ORANGE_NETMASK'} );
 198         push(@colour, ${Header::colourorange} );
 199         # Add Orange Routes to Array
 200         @routes = `/sbin/route -n | /bin/grep $netsettings{'ORANGE_DEV'}`;
 201         foreach my $route (@routes) {
 202                 chomp($route);
 203                 my @temp = split(/[\t ]+/, $route);
 204                 push(@network, $temp[0]);
 205                 push(@masklen, $temp[2]);
 206                 push(@colour, ${Header::colourorange} );
 207         }
 208 }
 209
 210 # Highlight multicast connections.
 211 push(@network, "224.0.0.0");
 212 push(@masklen, "239.0.0.0");
 213 push(@colour, $colour_multicast);
 214
 215 # Add OpenVPN net and RED/BLUE/ORANGE entry (when appropriate)
 216 if (-e "${General::swroot}/ovpn/settings") {
 217         my %ovpnsettings = ();
 218         &General::readhash("${General::swroot}/ovpn/settings", \%ovpnsettings);
 219         my @tempovpnsubnet = split("\/",$ovpnsettings{'DOVPN_SUBNET'});
 220
 221         # add OpenVPN net
 222         push(@network, $tempovpnsubnet[0]);
 223         push(@masklen, $tempovpnsubnet[1]);
 224         push(@colour, ${Header::colourovpn} );
 225
 226         # add BLUE:port / proto
 227         if (($ovpnsettings{'ENABLED_BLUE'} eq 'on') && $netsettings{'BLUE_DEV'}) {
 228                 push(@network, $netsettings{'BLUE_ADDRESS'} );
 229                 push(@masklen, '255.255.255.255' );
 230                 push(@colour, ${Header::colourovpn});
 231         }
 232
 233         # add ORANGE:port / proto
 234         if (($ovpnsettings{'ENABLED_ORANGE'} eq 'on') && $netsettings{'ORANGE_DEV'}) {
 235                 push(@network, $netsettings{'ORANGE_ADDRESS'} );
 236                 push(@masklen, '255.255.255.255' );
 237                 push(@colour, ${Header::colourovpn} );
 238         }
 239 }
 240
 241 # Add OpenVPN net for custom OVPNs
 242 if (-e "${General::swroot}/ovpn/ccd.conf") {
 243         open(OVPNSUB, "${General::swroot}/ovpn/ccd.conf");
 244         my @ovpnsub = <OVPNSUB>;
 245         close(OVPNSUB);
 246
 247         foreach (@ovpnsub) {
 248                 my ($network, $mask) = split '/', (split ',', $_)[2];
 249
 250                 $mask = ipv4_cidr2msk($mask) unless &General::validip($mask);
 251
 252                 push(@network, $network);
 253                 push(@masklen, $mask);
 254                 push(@colour, ${Header::colourovpn});
 255         }
 256 }
 257
 258 open(IPSEC, "${General::swroot}/vpn/config");
 259 my @ipsec = <IPSEC>;
 260 close(IPSEC);
 261
 262 foreach my $line (@ipsec) {
 263         my @vpn = split(',', $line);
 264         my ($network, $mask) = split("/", $vpn[12]);
 265
 266         if (!&General::validip($mask)) {
 267                 $mask = ipv4_cidr2msk($mask);
 268         }
 269
 270         push(@network, $network);
 271         push(@masklen, $mask);
 272         push(@colour, ${Header::colourvpn});
 273 }
 274
 275 if (-e "${General::swroot}/ovpn/n2nconf") {
 276         open(OVPNN2N, "${General::swroot}/ovpn/ovpnconfig");
 277         my @ovpnn2n = <OVPNN2N>;
 278         close(OVPNN2N);
 279
 280         foreach my $line (@ovpnn2n) {
 281                 my @ovpn = split(',', $line);
 282                 next if ($ovpn[4] ne 'net');
 283
 284                 my ($network, $mask) = split("/", $ovpn[12]);
 285                 if (!&General::validip($mask)) {
 286                         $mask = ipv4_cidr2msk($mask);
 287                 }
 288
 289                 push(@network, $network);
 290                 push(@masklen, $mask);
 291                 push(@colour, ${Header::colourovpn});
 292         }
 293 }
 294
 295 # Show the page.
 296 &Header::openpage($Lang::tr{'connections'}, 1, '');
 297 &Header::openbigbox('100%', 'left');
 298 &Header::openbox('100%', 'left', $Lang::tr{'connection tracking'});
 299
 300 # Print legend.
 301 print <<END;
 302         <table style='width:100%'>
 303                 <tr>
 304                         <td style='text-align:center;'>
 305                                 <b>$Lang::tr{'legend'} :</b>
 306                         </td>
 307                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourgreen}; font-weight:bold;'>
 308                                 <b>$Lang::tr{'lan'}</b>
 309                         </td>
 310                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourred};'>
 311                                 <b>$Lang::tr{'internet'}</b>
 312                         </td>
 313                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourorange};'>
 314                                 <b>$Lang::tr{'dmz'}</b>
 315                         </td>
 316                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourblue};'>
 317                                 <b>$Lang::tr{'wireless'}</b>
 318                         </td>
 319                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourfw};'>
 320                                 <b>IPFire</b>
 321                         </td>
 322                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourvpn};'>
 323                                 <b>$Lang::tr{'vpn'}</b>
 324                         </td>
 325                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourovpn};'>
 326                                 <b>$Lang::tr{'OpenVPN'}</b>
 327                         </td>
 328                         <td style='text-align:center; color:#FFFFFF; background-color:$colour_multicast;'>
 329                                 <b>Multicast</b>
 330                         </td>
 331                 </tr>
 332         </table>
 333         <br>
 334 END
 335
 336 if ($SORT_FIELD and $SORT_ORDER) {
 337         my @sort_field_name = (
 338                 $Lang::tr{'source ip'},
 339                 $Lang::tr{'destination ip'},
 340                 $Lang::tr{'source port'},
 341                 $Lang::tr{'destination port'},
 342                 $Lang::tr{'protocol'},
 343                 $Lang::tr{'connection'}.' '.$Lang::tr{'status'},
 344                 $Lang::tr{'expires'}.' ('.$Lang::tr{'seconds'}.')',
 345                 $Lang::tr{'download'},
 346                 $Lang::tr{'upload'}
 347         );
 348         my $sort_order_name;
 349         if (lc($SORT_ORDER) eq "a") {
 350                 $sort_order_name = $Lang::tr{'sort ascending'};
 351         } else {
 352                 $sort_order_name = $Lang::tr{'sort descending'};
 353         }
 354
 355 print <<END
 356         <div style="font-weight:bold;margin:10px;font-size: 70%">
 357                 $sort_order_name: $sort_field_name[$SORT_FIELD-1]
 358         </div>
 359 END
 360 ;
 361 }
 362
 363 # Print table header.
 364 print <<END;
 365         <table style='width:100%'>
 366                 <tr>
 367                         <th style='text-align:center'>
 368                                 <a href="?sort_field=5&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 369                                 <a href="?sort_field=5&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 370                         </th>
 371                         <th style='text-align:center' colspan='2'>
 372                                 <a href="?sort_field=1&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 373                                 <a href="?sort_field=1&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 374                                 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
 375                                 <a href="?sort_field=3&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 376                                 <a href="?sort_field=3&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 377                         </th>
 378                         <th style='text-align:center' colspan='2'>
 379                                 <a href="?sort_field=2&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 380                                 <a href="?sort_field=2&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 381                                 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
 382                                 <a href="?sort_field=4&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 383                                 <a href="?sort_field=4&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 384                         </th>
 385                         <th style='text-align:center'>
 386                                 <a href="?sort_field=8&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 387                                 <a href="?sort_field=8&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 388                                 &nbsp;&nbsp;&nbsp;&nbsp;
 389                                 <a href="?sort_field=9&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 390                                 <a href="?sort_field=9&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 391                         </th>
 392                         <th style='text-align:center'>
 393                                 <a href="?sort_field=6&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 394                                 <a href="?sort_field=6&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 395                         </th>
 396                         <th style='text-align:center'>
 397                                 <a href="?sort_field=7&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 398                                 <a href="?sort_field=7&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 399                         </th>
 400                 </tr>
 401                 <tr>
 402                         <th style='text-align:center'>
 403                                 $Lang::tr{'protocol'}
 404                         </th>
 405                         <th style='text-align:center' colspan='2'>
 406                                 $Lang::tr{'source ip and port'}
 407                         </th>
 408                         <th style='text-align:center' colspan='2'>
 409                                 $Lang::tr{'dest ip and port'}
 410                         </th>
 411                         <th style='text-align:center'>
 412                                 $Lang::tr{'download'} /
 413                                 <br>$Lang::tr{'upload'}
 414                         </th>
 415                         <th style='text-align:center'>
 416                                 $Lang::tr{'connection'}<br>$Lang::tr{'status'}
 417                         </th>
 418                         <th style='text-align:center'>
 419                                 $Lang::tr{'expires'}<br>($Lang::tr{'seconds'})
 420                         </th>
 421                 </tr>
 422 END
 423
 424 foreach my $line (@conntrack) {
 425         my @conn = split(' ', $line);
 426
 427         # The first bit is the l3 protocol.
 428         my $l3proto = $conn[0];
 429
 430         # Skip everything that is not IPv4.
 431         if ($l3proto ne 'ipv4') {
 432                 next;
 433         }
 434
 435         # L4 protocol (tcp, udp, ...).
 436         my $l4proto = $conn[2];
 437
 438         # Translate unknown protocols.
 439         if ($l4proto eq 'unknown') {
 440                 my $l4protonum = $conn[3];
 441                 if ($l4protonum eq '2') {
 442                         $l4proto = 'IGMP';
 443                 } elsif ($l4protonum eq '4') {
 444                         $l4proto = 'IPv4 Encap';
 445                 } elsif ($l4protonum eq '33') {
 446                         $l4proto = 'DCCP';
 447                 } elsif ($l4protonum eq '41') {
 448                         $l4proto = 'IPv6 Encap';
 449                 } elsif ($l4protonum eq '50') {
 450                         $l4proto = 'ESP';
 451                 } elsif ($l4protonum eq '51') {
 452                         $l4proto = 'AH';
 453                 } elsif ($l4protonum eq '132') {
 454                         $l4proto = 'SCTP';
 455                 } else {
 456                         $l4proto = $l4protonum;
 457                 }
 458         } else {
 459                 $l4proto = uc($l4proto);
 460         }
 461
 462         # Source and destination.
 463         my $sip;
 464         my $sip_ret;
 465         my $dip;
 466         my $dip_ret;
 467         my $sport;
 468         my $sport_ret;
 469         my $dport;
 470         my $dport_ret;
 471         my @packets;
 472         my @bytes;
 473
 474         my $ttl = $conn[4];
 475         my $state;
 476         if ($l4proto eq 'TCP') {
 477                 $state = $conn[5];
 478         }
 479
 480         # Kick out everything that is not IPv4.
 481         foreach my $item (@conn) {
 482                 my ($key, $val) = split('=', $item);
 483
 484                 switch ($key) {
 485                         case "src" {
 486                                 if ($sip == "") {
 487                                         $sip = $val;
 488                                 } else {
 489                                         $dip_ret = $val;
 490                                 }
 491                         }
 492                         case "dst" {
 493                                 if ($dip == "") {
 494                                         $dip = $val;
 495                                 } else {
 496                                         $sip_ret = $val;
 497                                 }
 498                         }
 499                         case "sport" {
 500                                 if ($sport == "") {
 501                                         $sport = $val;
 502                                 } else {
 503                                         $dport_ret = $val;
 504                                 }
 505                         }
 506                         case "dport" {
 507                                 if ($dport == "") {
 508                                         $dport = $val;
 509                                 } else {
 510                                         $sport_ret = $val;
 511                                 }
 512                         }
 513                         case "packets" {
 514                                 push(@packets, $val);
 515                         }
 516                         case "bytes" {
 517                                 push(@bytes, $val);
 518                         }
 519                 }
 520         }
 521
 522         my $sip_colour = ipcolour($sip);
 523         # use colour of destination network for DNAT
 524         my $dip_colour = $dip ne $dip_ret ? ipcolour($dip_ret) : ipcolour($dip);
 525
 526         my $sserv = '';
 527         if ($sport < 1024) {
 528                 $sserv = uc(getservbyport($sport, lc($l4proto)));
 529         }
 530
 531         my $dserv = '';
 532         if ($dport < 1024) {
 533                 $dserv = uc(getservbyport($dport, lc($l4proto)));
 534         }
 535
 536         my $bytes_in = format_bytes($bytes[0]);
 537         my $bytes_out = format_bytes($bytes[1]);
 538
 539         # Format TTL
 540         $ttl = format_time($ttl);
 541
 542         my $sip_extra;
 543         if ($sip ne $sip_ret) {
 544                 $sip_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 545                 $sip_extra .= "<a href='/cgi-bin/ipinfo.cgi?ip=$sip_ret'>";
 546                 $sip_extra .= " <span style='color:#FFFFFF;'>$sip_ret</span>";
 547                 $sip_extra .= "</a>";
 548         }
 549
 550         my $dip_extra;
 551         if ($dip ne $dip_ret) {
 552                 $dip_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 553                 $dip_extra .= "<a href='/cgi-bin/ipinfo.cgi?ip=$dip_ret'>";
 554                 $dip_extra .= " <span style='color:#FFFFFF;'>$dip_ret</span>";
 555                 $dip_extra .= "</a>";
 556         }
 557
 558
 559         my $sport_extra;
 560         if ($sport ne $sport_ret) {
 561                 my $sserv_ret = '';
 562                 if ($sport_ret < 1024) {
 563                         $sserv_ret = uc(getservbyport($sport_ret, lc($l4proto)));
 564                 }
 565
 566                 $sport_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 567                 $sport_extra .= "<a href='http://isc.sans.org/port_details.php?port=$sport_ret' target='top' title='$sserv_ret'>";
 568                 $sport_extra .= " <span style='color:#FFFFFF;'>$sport_ret</span>";
 569                 $sport_extra .= "</a>";
 570         }
 571
 572         my $dport_extra;
 573         if ($dport ne $dport_ret) {
 574                 my $dserv_ret = '';
 575                 if ($dport_ret < 1024) {
 576                         $dserv_ret = uc(getservbyport($dport_ret, lc($l4proto)));
 577                 }
 578
 579                 $dport_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 580                 $dport_extra .= "<a href='http://isc.sans.org/port_details.php?port=$dport_ret' target='top' title='$dserv_ret'>";
 581                 $dport_extra .= " <span style='color:#FFFFFF;'>$dport_ret</span>";
 582                 $dport_extra .= "</a>";
 583         }
 584
 585         print <<END;
 586         <tr>
 587                 <td style='text-align:center'>$l4proto</td>
 588                 <td style='text-align:center; background-color:$sip_colour;'>
 589                         <a href='/cgi-bin/ipinfo.cgi?ip=$sip'>
 590                                 <span style='color:#FFFFFF;'>$sip</span>
 591                         </a>
 592                         $sip_extra
 593                 </td>
 594                 <td style='text-align:center; background-color:$sip_colour;'>
 595                         <a href='http://isc.sans.org/port_details.php?port=$sport' target='top' title='$sserv'>
 596                                 <span style='color:#FFFFFF;'>$sport</span>
 597                         </a>
 598                         $sport_extra
 599                 </td>
 600                 <td style='text-align:center; background-color:$dip_colour;'>
 601                         <a href='/cgi-bin/ipinfo.cgi?ip=$dip'>
 602                                 <span style='color:#FFFFFF;'>$dip</span>
 603                         </a>
 604                         $dip_extra
 605                 </td>
 606                 <td style='text-align:center; background-color:$dip_colour;'>
 607                         <a href='http://isc.sans.org/port_details.php?port=$dport' target='top' title='$dserv'>
 608                                 <span style='color:#FFFFFF;'>$dport</span>
 609                         </a>
 610                         $dport_extra
 611                 </td>
 612                 <td style='text-align:center'>
 613                         $bytes_in / $bytes_out
 614                 </td>
 615                 <td style='text-align:center'>$state</td>
 616                 <td style='text-align:center'>$ttl</td>
 617         </tr>
 618 END
 619 }
 620
 621 # Close the main table.
 622 print "</table>";
 623
 624 &Header::closebox();
 625 &Header::closebigbox();
 626 &Header::closepage();
 627
 628 sub format_bytes($) {
 629         my $bytes = shift;
 630         my @units = ("B", "k", "M", "G", "T");
 631
 632         foreach my $unit (@units) {
 633                 if ($bytes < 1024) {
 634                         return sprintf("%d%s", $bytes, $unit);
 635                 }
 636
 637                 $bytes /= 1024;
 638         }
 639
 640         return sprintf("%d%s", $bytes, $units[$#units]);
 641 }
 642
 643 sub format_time($) {
 644         my $time = shift;
 645
 646         my $seconds = $time % 60;
 647         my $minutes = $time / 60;
 648
 649         my $hours = 0;
 650         if ($minutes >= 60) {
 651                 $hours = $minutes / 60;
 652                 $minutes %= 60;
 653         }
 654
 655         return sprintf("%3d:%02d:%02d", $hours, $minutes, $seconds);
 656 }
 657
 658 sub ipcolour($) {
 659         my $id = 0;
 660         my $colour = ${Header::colourred};
 661         my ($ip) = $_[0];
 662         my $found = 0;
 663
 664         foreach my $line (@network) {
 665                 if ($network[$id] eq '') {
 666                         $id++;
 667                 } else {
 668                         if (!$found && ipv4_in_network($network[$id], $masklen[$id], $ip) ) {
 669                                 $found = 1;
 670                                 $colour = $colour[$id];
 671                         }
 672                         $id++;
 673                 }
 674         }
 675
 676         return $colour;
 677 }
 678
 679 1;