html/cgi-bin/connections.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2023  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 use experimental 'smartmatch';
  24
  25 use Net::IPv4Addr qw( :all );
  26 use Switch;
  27
  28 # enable only the following on debugging purpose
  29 #use warnings;
  30 #use CGI::Carp 'fatalsToBrowser';
  31
  32 require '/var/ipfire/general-functions.pl';
  33 require "${General::swroot}/lang.pl";
  34 require "${General::swroot}/header.pl";
  35 require "${General::swroot}/location-functions.pl";
  36
  37 my $colour_multicast = "#A0A0A0";
  38
  39 # sort arguments for connection tracking table
  40 # the sort field. eg. 1=src IP, 2=dst IP, 3=src port, 4=dst port
  41 my $SORT_FIELD = 0;
  42 # the sort order. (a)scending orr (d)escending
  43 my $SORT_ORDER = 0;
  44 # cgi query arguments
  45 my %cgiin;
  46 # debug mode
  47 my $debug = 0;
  48
  49 # retrieve query arguments
  50 # note: let a-z A-Z and 0-9 pass as value only
  51 if (length ($ENV{'QUERY_STRING'}) > 0){
  52         my $name;
  53         my $value;
  54         my $buffer = $ENV{'QUERY_STRING'};
  55         my @pairs = split(/&/, $buffer);
  56         foreach my $pair (@pairs){
  57                 ($name, $value) = split(/=/, $pair);
  58                 $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; # e.g. "%20" => " "
  59                 $value =~ s/[^a-zA-Z0-9]*//g; # a-Z 0-9 will pass
  60                 $cgiin{$name} = $value;
  61         }
  62 }
  63
  64 &Header::showhttpheaders();
  65
  66 my @network=();
  67 my @masklen=();
  68 my @colour=();
  69
  70 my %netsettings=();
  71 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  72
  73 # output cgi query arrguments to browser on debug
  74 if ( $debug ){
  75         &Header::openbox('100%', 'center', 'DEBUG');
  76         my $debugCount = 0;
  77         foreach my $line (sort keys %cgiin) {
  78                 print "$line = '$cgiin{$line}'<br />\n";
  79                 $debugCount++;
  80         }
  81         print "&nbsp;Count: $debugCount\n";
  82         &Header::closebox();
  83 }
  84
  85 #workaround to suppress a warning when a variable is used only once
  86 my @dummy = ( ${Header::table1colour} );
  87 undef (@dummy);
  88
  89 # check sorting arguments
  90 if ( $cgiin{'sort_field'} ~~ [ '1','2','3','4','5','6','7','8','9' ] ) {
  91         $SORT_FIELD = $cgiin{'sort_field'};
  92
  93         if ( $cgiin{'sort_order'} ~~ [ 'a','d','A','D' ] ) {
  94                 $SORT_ORDER = lc($cgiin{'sort_order'});
  95         }
  96 }
  97
  98 # Read and sort the connection tracking table
  99 # do sorting
 100 if ($SORT_FIELD and $SORT_ORDER) {
 101         # field sorting when sorting arguments are sane
 102         open(CONNTRACK, "/usr/local/bin/getconntracktable | /usr/local/bin/consort.sh $SORT_FIELD $SORT_ORDER |") or die "Unable to read conntrack table";
 103 } else {
 104         # default sorting with no query arguments
 105         open(CONNTRACK, "/usr/local/bin/getconntracktable | sort -k 5,5 --numeric-sort --reverse |") or die "Unable to read conntrack table";
 106 }
 107 my @conntrack = <CONNTRACK>;
 108 close(CONNTRACK);
 109
 110 # Collect data for the @network array.
 111
 112 # Add Firewall Localhost 127.0.0.1
 113 push(@network, '127.0.0.1');
 114 push(@masklen, '255.255.255.255');
 115 push(@colour, ${Header::colourfw});
 116
 117 if (open(IP, "${General::swroot}/red/local-ipaddress")) {
 118         my $redip = <IP>;
 119         close(IP);
 120
 121         chomp $redip;
 122         push(@network, $redip);
 123         push(@masklen, '255.255.255.255');
 124         push(@colour, ${Header::colourfw});
 125 }
 126
 127 # Add STATIC RED aliases
 128 if ($netsettings{'RED_DEV'}) {
 129         my $aliasfile = "${General::swroot}/ethernet/aliases";
 130         open(ALIASES, $aliasfile) or die 'Unable to open aliases file.';
 131         my @aliases = <ALIASES>;
 132         close(ALIASES);
 133
 134         # We have a RED eth iface
 135         if ($netsettings{'RED_TYPE'} eq 'STATIC') {
 136                 # We have a STATIC RED eth iface
 137                 foreach my $line (@aliases) {
 138                         chomp($line);
 139                         my @temp = split(/\,/,$line);
 140                         if ($temp[0]) {
 141                                 push(@network, $temp[0]);
 142                                 push(@masklen, $netsettings{'RED_NETMASK'} );
 143                                 push(@colour, ${Header::colourfw} );
 144                         }
 145                 }
 146         }
 147 }
 148
 149 # Call safe system_output function to get all available routes.
 150 my @all_routes = &General::system_output("/sbin/route", "-n");
 151
 152 # Add Green Firewall Interface
 153 push(@network, $netsettings{'GREEN_ADDRESS'});
 154 push(@masklen, "255.255.255.255" );
 155 push(@colour, ${Header::colourfw} );
 156
 157 if ($netsettings{'GREEN_DEV'}) {
 158         # Add Green Network to Array
 159         push(@network, $netsettings{'GREEN_NETADDRESS'});
 160         push(@masklen, $netsettings{'GREEN_NETMASK'} );
 161         push(@colour, ${Header::colourgreen} );
 162
 163         # Add Green Routes to Array
 164         my @routes = grep (/$netsettings{'GREEN_DEV'}/, @all_routes);
 165         foreach my $route (@routes) {
 166                 chomp($route);
 167                 my @temp = split(/[\t ]+/, $route);
 168                 push(@network, $temp[0]);
 169                 push(@masklen, $temp[2]);
 170                 push(@colour, ${Header::colourgreen} );
 171         }
 172 }
 173
 174 # Add Blue Firewall Interface
 175 push(@network, $netsettings{'BLUE_ADDRESS'});
 176 push(@masklen, "255.255.255.255" );
 177 push(@colour, ${Header::colourfw} );
 178
 179 # Add Blue Network
 180 if ($netsettings{'BLUE_DEV'}) {
 181         push(@network, $netsettings{'BLUE_NETADDRESS'});
 182         push(@masklen, $netsettings{'BLUE_NETMASK'} );
 183         push(@colour, ${Header::colourblue} );
 184
 185         # Add Blue Routes to Array
 186         my @routes = grep(/$netsettings{'BLUE_DEV'}/, @all_routes);
 187         foreach my $route (@routes) {
 188                 chomp($route);
 189                 my @temp = split(/[\t ]+/, $route);
 190                 push(@network, $temp[0]);
 191                 push(@masklen, $temp[2]);
 192                 push(@colour, ${Header::colourblue} );
 193         }
 194 }
 195
 196 # Add Orange Firewall Interface
 197 push(@network, $netsettings{'ORANGE_ADDRESS'});
 198 push(@masklen, "255.255.255.255" );
 199 push(@colour, ${Header::colourfw} );
 200
 201 # Add Orange Network
 202 if ($netsettings{'ORANGE_DEV'}) {
 203         push(@network, $netsettings{'ORANGE_NETADDRESS'});
 204         push(@masklen, $netsettings{'ORANGE_NETMASK'} );
 205         push(@colour, ${Header::colourorange} );
 206         # Add Orange Routes to Array
 207         my @routes = grep(/$netsettings{'ORANGE_DEV'}/, @all_routes);
 208         foreach my $route (@routes) {
 209                 chomp($route);
 210                 my @temp = split(/[\t ]+/, $route);
 211                 push(@network, $temp[0]);
 212                 push(@masklen, $temp[2]);
 213                 push(@colour, ${Header::colourorange} );
 214         }
 215 }
 216
 217 # Highlight multicast connections.
 218 push(@network, "224.0.0.0");
 219 push(@masklen, "239.0.0.0");
 220 push(@colour, $colour_multicast);
 221
 222 # Add OpenVPN net and RED/BLUE/ORANGE entry (when appropriate)
 223 if (-e "${General::swroot}/ovpn/settings") {
 224         my %ovpnsettings = ();
 225         &General::readhash("${General::swroot}/ovpn/settings", \%ovpnsettings);
 226         my @tempovpnsubnet = split("\/",$ovpnsettings{'DOVPN_SUBNET'});
 227
 228         # add OpenVPN net
 229         push(@network, $tempovpnsubnet[0]);
 230         push(@masklen, $tempovpnsubnet[1]);
 231         push(@colour, ${Header::colourovpn} );
 232
 233         # add BLUE:port / proto
 234         if (($ovpnsettings{'ENABLED_BLUE'} eq 'on') && $netsettings{'BLUE_DEV'}) {
 235                 push(@network, $netsettings{'BLUE_ADDRESS'} );
 236                 push(@masklen, '255.255.255.255' );
 237                 push(@colour, ${Header::colourovpn});
 238         }
 239
 240         # add ORANGE:port / proto
 241         if (($ovpnsettings{'ENABLED_ORANGE'} eq 'on') && $netsettings{'ORANGE_DEV'}) {
 242                 push(@network, $netsettings{'ORANGE_ADDRESS'} );
 243                 push(@masklen, '255.255.255.255' );
 244                 push(@colour, ${Header::colourovpn} );
 245         }
 246 }
 247
 248 # Add OpenVPN net for custom OVPNs
 249 if (-e "${General::swroot}/ovpn/ccd.conf") {
 250         open(OVPNSUB, "${General::swroot}/ovpn/ccd.conf");
 251         my @ovpnsub = <OVPNSUB>;
 252         close(OVPNSUB);
 253
 254         foreach (@ovpnsub) {
 255                 my ($network, $mask) = split '/', (split ',', $_)[2];
 256
 257                 $mask = ipv4_cidr2msk($mask) unless &General::validip($mask);
 258
 259                 push(@network, $network);
 260                 push(@masklen, $mask);
 261                 push(@colour, ${Header::colourovpn});
 262         }
 263 }
 264
 265 open(IPSEC, "${General::swroot}/vpn/config");
 266 my @ipsec = <IPSEC>;
 267 close(IPSEC);
 268
 269 foreach my $line (@ipsec) {
 270         my @vpn = split(',', $line);
 271
 272         my @subnets = split(/\|/, $vpn[12]);
 273         for my $subnet (@subnets) {
 274                 my ($network, $mask) = split("/", $subnet);
 275
 276                 if (!&General::validip($mask)) {
 277                         $mask = ipv4_cidr2msk($mask);
 278                 }
 279
 280                 push(@network, $network);
 281                 push(@masklen, $mask);
 282                 push(@colour, ${Header::colourvpn});
 283         }
 284 }
 285
 286 if (-e "${General::swroot}/ovpn/n2nconf") {
 287         open(OVPNN2N, "${General::swroot}/ovpn/ovpnconfig");
 288         my @ovpnn2n = <OVPNN2N>;
 289         close(OVPNN2N);
 290
 291         foreach my $line (@ovpnn2n) {
 292                 my @ovpn = split(',', $line);
 293                 next if ($ovpn[4] ne 'net');
 294
 295                 my ($network, $mask) = split("/", $ovpn[12]);
 296                 if (!&General::validip($mask)) {
 297                         $mask = ipv4_cidr2msk($mask);
 298                 }
 299
 300                 push(@network, $network);
 301                 push(@masklen, $mask);
 302                 push(@colour, ${Header::colourovpn});
 303         }
 304 }
 305
 306 # Show the page.
 307 &Header::openpage($Lang::tr{'connections'}, 1, '');
 308 &Header::openbigbox('100%', 'left');
 309 &Header::openbox('100%', 'left', $Lang::tr{'connection tracking'});
 310
 311 # Print legend.
 312 print <<END;
 313         <table style='width:100%'>
 314                 <tr>
 315                         <td style='text-align:center;'>
 316                                 <b>$Lang::tr{'legend'} :</b>
 317                         </td>
 318                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourgreen}; font-weight:bold;'>
 319                                 <b>$Lang::tr{'lan'}</b>
 320                         </td>
 321                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourred};'>
 322                                 <b>$Lang::tr{'internet'}</b>
 323                         </td>
 324                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourorange};'>
 325                                 <b>$Lang::tr{'dmz'}</b>
 326                         </td>
 327                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourblue};'>
 328                                 <b>$Lang::tr{'wireless'}</b>
 329                         </td>
 330                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourfw};'>
 331                                 <b>IPFire</b>
 332                         </td>
 333                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourvpn};'>
 334                                 <b>$Lang::tr{'vpn'}</b>
 335                         </td>
 336                         <td style='text-align:center; color:#FFFFFF; background-color:${Header::colourovpn};'>
 337                                 <b>$Lang::tr{'OpenVPN'}</b>
 338                         </td>
 339                         <td style='text-align:center; color:#FFFFFF; background-color:$colour_multicast;'>
 340                                 <b>Multicast</b>
 341                         </td>
 342                 </tr>
 343         </table>
 344         <br>
 345 END
 346
 347 if ($SORT_FIELD and $SORT_ORDER) {
 348         my @sort_field_name = (
 349                 $Lang::tr{'source ip'},
 350                 $Lang::tr{'destination ip'},
 351                 $Lang::tr{'source port'},
 352                 $Lang::tr{'destination port'},
 353                 $Lang::tr{'protocol'},
 354                 $Lang::tr{'connection'}.' '.$Lang::tr{'status'},
 355                 $Lang::tr{'expires'}.' ('.$Lang::tr{'hours:minutes:seconds'}.')',
 356                 $Lang::tr{'download'},
 357                 $Lang::tr{'upload'}
 358         );
 359         my $sort_order_name;
 360         if (lc($SORT_ORDER) eq "a") {
 361                 $sort_order_name = $Lang::tr{'sort ascending'};
 362         } else {
 363                 $sort_order_name = $Lang::tr{'sort descending'};
 364         }
 365
 366 print <<END
 367         <div style="font-weight:bold;margin:10px;font-size: 70%">
 368                 $sort_order_name: $sort_field_name[$SORT_FIELD-1]
 369         </div>
 370 END
 371 ;
 372 }
 373
 374 # Print table header.
 375 print <<END;
 376         <table style='width:100%'>
 377                 <tr>
 378                         <th style='text-align:center'>
 379                                 <a href="?sort_field=5&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 380                                 <a href="?sort_field=5&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 381                         </th>
 382                         <th style='text-align:center' colspan='2'>
 383                                 <a href="?sort_field=1&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 384                                 <a href="?sort_field=1&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 385                                 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
 386                                 <a href="?sort_field=3&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 387                                 <a href="?sort_field=3&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 388                         </th>
 389                         <th>&nbsp;</th>
 390                         <th style='text-align:center' colspan='2'>
 391                                 <a href="?sort_field=2&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 392                                 <a href="?sort_field=2&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 393                                 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
 394                                 <a href="?sort_field=4&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 395                                 <a href="?sort_field=4&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 396                         </th>
 397                         <th>&nbsp;</th>
 398                         <th style='text-align:center'>
 399                                 <a href="?sort_field=8&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 400                                 <a href="?sort_field=8&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 401                                 &nbsp;&nbsp;&nbsp;&nbsp;
 402                                 <a href="?sort_field=9&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 403                                 <a href="?sort_field=9&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 404                         </th>
 405                         <th style='text-align:center'>
 406                                 <a href="?sort_field=6&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 407                                 <a href="?sort_field=6&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 408                         </th>
 409                         <th style='text-align:center'>
 410                                 <a href="?sort_field=7&amp;sort_order=d"><img style="width:10px" src="/images/up.gif" alt=""></a>
 411                                 <a href="?sort_field=7&amp;sort_order=a"><img style="width:10px" src="/images/down.gif" alt=""></a>
 412                         </th>
 413                 </tr>
 414                 <tr>
 415                         <th style='text-align:center'>
 416                                 $Lang::tr{'protocol'}
 417                         </th>
 418                         <th style='text-align:center' colspan='2'>
 419                                 $Lang::tr{'source ip and port'}
 420                         </th>
 421                         <th style='text-align:center'>
 422                                 $Lang::tr{'country'}
 423                         </th>
 424                         <th style='text-align:center' colspan='2'>
 425                                 $Lang::tr{'dest ip and port'}
 426                         </th>
 427                         <th style='text-align:center'>
 428                                 $Lang::tr{'country'}
 429                         </th>
 430                         <th style='text-align:center'>
 431                                 $Lang::tr{'download'} /
 432                                 <br>$Lang::tr{'upload'}
 433                         </th>
 434                         <th style='text-align:center'>
 435                                 $Lang::tr{'connection'}<br>$Lang::tr{'status'}
 436                         </th>
 437                         <th style='text-align:center'>
 438                                 $Lang::tr{'expires'}<br>($Lang::tr{'hours:minutes:seconds'})
 439                         </th>
 440                 </tr>
 441 END
 442
 443 foreach my $line (@conntrack) {
 444         my @conn = split(' ', $line);
 445
 446         # The first bit is the l3 protocol.
 447         my $l3proto = $conn[0];
 448
 449         # Skip everything that is not IPv4.
 450         if ($l3proto ne 'ipv4') {
 451                 next;
 452         }
 453
 454         # L4 protocol (tcp, udp, ...).
 455         my $l4proto = $conn[2];
 456
 457         # Translate unknown protocols.
 458         if ($l4proto eq 'unknown') {
 459                 my $l4protonum = $conn[3];
 460                 if ($l4protonum eq '2') {
 461                         $l4proto = 'IGMP';
 462                 } elsif ($l4protonum eq '4') {
 463                         $l4proto = 'IPv4 Encap';
 464                 } elsif ($l4protonum eq '33') {
 465                         $l4proto = 'DCCP';
 466                 } elsif ($l4protonum eq '41') {
 467                         $l4proto = 'IPv6 Encap';
 468                 } elsif ($l4protonum eq '50') {
 469                         $l4proto = 'ESP';
 470                 } elsif ($l4protonum eq '51') {
 471                         $l4proto = 'AH';
 472                 } elsif ($l4protonum eq '132') {
 473                         $l4proto = 'SCTP';
 474                 } else {
 475                         $l4proto = $l4protonum;
 476                 }
 477         } else {
 478                 $l4proto = uc($l4proto);
 479         }
 480
 481         # Source and destination.
 482         my $sip;
 483         my $sip_ret;
 484         my $dip;
 485         my $dip_ret;
 486         my $sport;
 487         my $sport_ret;
 488         my $dport;
 489         my $dport_ret;
 490         my @packets;
 491         my @bytes;
 492
 493         my $ttl = $conn[4];
 494         my $state;
 495         if ($l4proto eq 'TCP') {
 496                 $state = $conn[5];
 497         }
 498
 499         # Kick out everything that is not IPv4.
 500         foreach my $item (@conn) {
 501                 my ($key, $val) = split('=', $item);
 502
 503                 switch ($key) {
 504                         case "src" {
 505                                 if ($sip == "") {
 506                                         $sip = $val;
 507                                 } else {
 508                                         $dip_ret = $val;
 509                                 }
 510                         }
 511                         case "dst" {
 512                                 if ($dip == "") {
 513                                         $dip = $val;
 514                                 } else {
 515                                         $sip_ret = $val;
 516                                 }
 517                         }
 518                         case "sport" {
 519                                 if ($sport == "") {
 520                                         $sport = $val;
 521                                 } else {
 522                                         $dport_ret = $val;
 523                                 }
 524                         }
 525                         case "dport" {
 526                                 if ($dport == "") {
 527                                         $dport = $val;
 528                                 } else {
 529                                         $sport_ret = $val;
 530                                 }
 531                         }
 532                         case "packets" {
 533                                 push(@packets, $val);
 534                         }
 535                         case "bytes" {
 536                                 push(@bytes, $val);
 537                         }
 538                 }
 539         }
 540
 541         my $sip_colour = ipcolour($sip);
 542         # use colour of destination network for DNAT
 543         my $dip_colour = $dip ne $dip_ret ? ipcolour($dip_ret) : ipcolour($dip);
 544
 545         my $sserv = '';
 546         if ($sport < 1024) {
 547                 $sserv = uc(getservbyport($sport, lc($l4proto)));
 548         }
 549
 550         my $dserv = '';
 551         if ($dport < 1024) {
 552                 $dserv = uc(getservbyport($dport, lc($l4proto)));
 553         }
 554
 555         my $bytes_in = format_bytes($bytes[0]);
 556         my $bytes_out = format_bytes($bytes[1]);
 557
 558         # enumerate location information
 559         my $srcccode = &Location::Functions::lookup_country_code($sip_ret);
 560         my $src_flag_icon = &Location::Functions::get_flag_icon($srcccode);
 561         my $dstccode = &Location::Functions::lookup_country_code($dip_ret);
 562         my $dst_flag_icon = &Location::Functions::get_flag_icon($dstccode);
 563
 564         # Format TTL
 565         $ttl = format_time($ttl);
 566
 567         my $sip_extra;
 568         if ($sip_ret && $sip ne $sip_ret) {
 569                 $sip_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 570                 $sip_extra .= "<a href='/cgi-bin/ipinfo.cgi?ip=$sip_ret'>";
 571                 $sip_extra .= " <span style='color:#FFFFFF;'>$sip_ret</span>";
 572                 $sip_extra .= "</a>";
 573         }
 574
 575         my $dip_extra;
 576         if ($dip_ret && $dip ne $dip_ret) {
 577                 $dip_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 578                 $dip_extra .= "<a href='/cgi-bin/ipinfo.cgi?ip=$dip_ret'>";
 579                 $dip_extra .= " <span style='color:#FFFFFF;'>$dip_ret</span>";
 580                 $dip_extra .= "</a>";
 581         }
 582
 583
 584         my $sport_extra;
 585         if ($sport ne $sport_ret) {
 586                 my $sserv_ret = '';
 587                 if ($sport_ret < 1024) {
 588                         $sserv_ret = uc(getservbyport($sport_ret, lc($l4proto)));
 589                 }
 590
 591                 $sport_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 592                 $sport_extra .= "<a href='https://isc.sans.edu/port.html?port=$sport_ret' target='top' title='$sserv_ret'>";
 593                 $sport_extra .= " <span style='color:#FFFFFF;'>$sport_ret</span>";
 594                 $sport_extra .= "</a>";
 595         }
 596
 597         my $dport_extra;
 598         if ($dport ne $dport_ret) {
 599                 my $dserv_ret = '';
 600                 if ($dport_ret < 1024) {
 601                         $dserv_ret = uc(getservbyport($dport_ret, lc($l4proto)));
 602                 }
 603
 604                 $dport_extra = "<span style='color:#FFFFFF;'>&gt;</span> ";
 605                 $dport_extra .= "<a href='https://isc.sans.edu/port.html?port=$dport_ret' target='top' title='$dserv_ret'>";
 606                 $dport_extra .= " <span style='color:#FFFFFF;'>$dport_ret</span>";
 607                 $dport_extra .= "</a>";
 608         }
 609
 610         print <<END;
 611         <tr>
 612                 <td style='text-align:center'>$l4proto</td>
 613                 <td style='text-align:center; background-color:$sip_colour;'>
 614                         <a href='/cgi-bin/ipinfo.cgi?ip=$sip'>
 615                                 <span style='color:#FFFFFF;'>$sip</span>
 616                         </a>
 617                         $sip_extra
 618                 </td>
 619                 <td style='text-align:center; background-color:$sip_colour;'>
 620                         <a href='https://isc.sans.edu/port.html?port=$sport' target='top' title='$sserv'>
 621                                 <span style='color:#FFFFFF;'>$sport</span>
 622                         </a>
 623                         $sport_extra
 624                 </td>
 625                 <td style='text-align:center; background-color:$sip_colour;'>
 626                         <a href='country.cgi#$srcccode'><img src='$src_flag_icon' border='0' align='absmiddle' alt='$srcccode' title='$srcccode' /></a>
 627                 </td>
 628                 <td style='text-align:center; background-color:$dip_colour;'>
 629                         <a href='/cgi-bin/ipinfo.cgi?ip=$dip'>
 630                                 <span style='color:#FFFFFF;'>$dip</span>
 631                         </a>
 632                         $dip_extra
 633                 </td>
 634                 <td style='text-align:center; background-color:$dip_colour;'>
 635                         <a href='https://isc.sans.edu/port.html?port=$dport' target='top' title='$dserv'>
 636                                 <span style='color:#FFFFFF;'>$dport</span>
 637                         </a>
 638                         $dport_extra
 639                 </td>
 640                 <td style='text-align:center; background-color:$sip_colour;'>
 641                         <a href='country.cgi#$dstccode'><img src='$dst_flag_icon' border='0' align='absmiddle' alt='$dstccode' title='$dstccode' /></a>
 642                 </td>
 643                 <td style='text-align:center'>
 644                         $bytes_in / $bytes_out
 645                 </td>
 646                 <td style='text-align:center'>$state</td>
 647                 <td style='text-align:center'>$ttl</td>
 648         </tr>
 649 END
 650 }
 651
 652 # Close the main table.
 653 print "</table>";
 654
 655 &Header::closebox();
 656 &Header::closebigbox();
 657 &Header::closepage();
 658
 659 sub format_bytes($) {
 660         my $bytes = shift;
 661         my @units = ("B", "k", "M", "G", "T");
 662
 663         foreach my $unit (@units) {
 664                 if ($bytes < 1024) {
 665                         return sprintf("%d%s", $bytes, $unit);
 666                 }
 667
 668                 $bytes /= 1024;
 669         }
 670
 671         return sprintf("%d%s", $bytes, $units[$#units]);
 672 }
 673
 674 sub format_time($) {
 675         my $time = shift;
 676
 677         my $seconds = $time % 60;
 678         my $minutes = $time / 60;
 679
 680         my $hours = 0;
 681         if ($minutes >= 60) {
 682                 $hours = $minutes / 60;
 683                 $minutes %= 60;
 684         }
 685
 686         return sprintf("%3d:%02d:%02d", $hours, $minutes, $seconds);
 687 }
 688
 689 sub ipcolour($) {
 690         my $id = 0;
 691         my $colour = ${Header::colourred};
 692         my ($ip) = $_[0];
 693         my $found = 0;
 694
 695         if ($ip) {
 696                 foreach my $line (@network) {
 697                         if ($network[$id] eq '') {
 698                                 $id++;
 699                         } else {
 700                                 if (!$found && ipv4_in_network($network[$id], $masklen[$id], $ip) ) {
 701                                         $found = 1;
 702                                         $colour = $colour[$id];
 703                                 }
 704                                 $id++;
 705                         }
 706                 }
 707         }
 708
 709         return $colour;
 710 }
 711
 712 1;