html/cgi-bin/ddns.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2014  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
  28 require '/var/ipfire/general-functions.pl';
  29 require "${General::swroot}/lang.pl";
  30 require "${General::swroot}/header.pl";
  31
  32 #workaround to suppress a warning when a variable is used only once
  33 my @dummy = ( ${Header::table2colour}, ${Header::colouryellow} );
  34 undef (@dummy);
  35
  36 my %color = ();
  37 my %mainsettings = ();
  38 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  39 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  40
  41 # Config file for basic configuration.
  42 my $settingsfile = "${General::swroot}/ddns/settings";
  43
  44 # Config file to store the configured ddns providers.
  45 my $datafile = "${General::swroot}/ddns/config";
  46
  47 # Dynamic ddns programm call.
  48 my @ddnsprog = ("/usr/bin/ddns", "--config",
  49                 "/var/ipfire/ddns/ddns.conf",
  50                 "update-all");
  51
  52 my %settings=();
  53 my $errormessage = '';
  54
  55 # DDNS General settings.
  56 $settings{'BEHINDROUTER'} = 'RED_IP';
  57
  58 # Account settings.
  59 $settings{'HOSTNAME'} = '';
  60 $settings{'DOMAIN'} = '';
  61 $settings{'LOGIN'} = '';
  62 $settings{'PASSWORD'} = '';
  63 $settings{'ENABLED'} = '';
  64 $settings{'PROXY'} = '';
  65 $settings{'SERVICE'} = '';
  66
  67 $settings{'ACTION'} = '';
  68
  69 # Get supported ddns providers.
  70 my @providers = &GetProviders();
  71
  72 # Hook to regenerate the configuration files, if cgi got called from command line.
  73 if ($ENV{"REMOTE_ADDR"} eq "") {
  74         &GenerateDDNSConfigFile();
  75         exit(0);
  76 }
  77
  78 &Header::showhttpheaders();
  79
  80 #Get GUI values
  81 &Header::getcgihash(\%settings);
  82
  83 # Read configuration file.
  84 open(FILE, "$datafile") or die "Unable to open $datafile.";
  85 my @current = <FILE>;
  86 close (FILE);
  87
  88 #
  89 # Save General Settings.
  90 #
  91 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
  92         # Open /var/ipfire/ddns/settings for writing.
  93         open(FILE, ">$settingsfile") or die "Unable to open $settingsfile.";
  94
  95         # Lock file for writing.
  96         flock FILE, 2;
  97
  98         # Check if BEHINDROUTER has been configured.
  99         if ($settings{'BEHINDROUTER'} ne '') {
 100                 print FILE "BEHINDROUTER=$settings{'BEHINDROUTER'}\n";
 101         }
 102
 103         # Close file after writing.
 104         close(FILE);
 105
 106         # Unset given CGI parmas.
 107         undef %settings;
 108
 109         # Update ddns config file.
 110         &GenerateDDNSConfigFile();
 111 }
 112
 113 #
 114 # Toggle enable/disable field.  Field is in second position
 115 #
 116 if ($settings{'ACTION'} eq $Lang::tr{'toggle enable disable'}) {
 117         # Open /var/ipfire/ddns/config for writing.
 118         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 119
 120         # Lock file for writing.
 121         flock FILE, 2;
 122
 123         my @temp;
 124         my $id = 0;
 125
 126         # Read file line by line.
 127         foreach my $line (@current) {
 128                 # Remove newlines.
 129                 chomp($line);
 130
 131                 if ($settings{'ID'} eq $id) {
 132                         # Splitt lines (splitting element is a single ",") and save values into temp array.
 133                         @temp = split(/\,/,$line);
 134
 135                         # Check if we want to toggle ENABLED or WILDCARDS.
 136                         if ($settings{'ENABLED'} ne '') {
 137                                 # Update ENABLED.
 138                                 print FILE "$temp[0],$temp[1],$temp[2],$temp[3],$temp[4],$temp[5],$temp[6],$settings{'ENABLED'}\n";
 139                         }
 140                 } else {
 141                         # Print unmodified line.
 142                         print FILE "$line\n";
 143                 }
 144
 145                 # Increase $id.
 146                 $id++;
 147         }
 148
 149         # Close file after writing.
 150         close(FILE);
 151
 152         # Write out logging notice.
 153         &General::log($Lang::tr{'ddns hostname modified'});
 154
 155         # Update ddns config file.
 156         &GenerateDDNSConfigFile();
 157 }
 158
 159 #
 160 # Add new accounts, or edit existing ones.
 161 #
 162 if (($settings{'ACTION'} eq $Lang::tr{'add'}) || ($settings{'ACTION'} eq $Lang::tr{'update'})) {
 163
 164         # Check if a hostname has been given.
 165         if ($settings{'HOSTNAME'} eq '') {
 166                 $errormessage = $Lang::tr{'hostname not set'};
 167         }
 168
 169         # Check if a valid domainname has been provided.
 170         if (!&General::validdomainname($settings{'HOSTNAME'})) {
 171                 $errormessage = $Lang::tr{'invalid domain name'};
 172         }
 173
 174         # Check if a username has been sent.
 175         if ($settings{'LOGIN'} eq '') {
 176                 $errormessage = $Lang::tr{'username not set'};
 177         }
 178
 179         # Check if a password has been typed in.
 180         # freedns.afraid.org does not require this field.
 181         if (($settings{'PASSWORD'} eq '') && ($settings{'SERVICE'} ne 'freedns.afraid.org') && ($settings{'SERVICE'} ne 'regfish.com')) {
 182                 $errormessage = $Lang::tr{'password not set'};
 183         }
 184
 185         # Go furter if there was no error.
 186         if (!$errormessage) {
 187                 # Splitt hostname field into 2 parts for storrage.
 188                 my($hostname, $domain) = split(/\./, $settings{'HOSTNAME'}, 2);
 189
 190                 # Handle enabled checkbox. When the checkbox is selected a "on" will be returned,
 191                 # if the checkbox is not checked nothing is returned in this case we set the value to "off".
 192                 if ($settings{'ENABLED'} ne 'on') {
 193                         $settings{'ENABLED'} = 'off';
 194                 }
 195
 196                 # Handle adding new accounts.
 197                 if ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 198                         # Open /var/ipfire/ddns/config for writing.
 199                         open(FILE, ">>$datafile") or die "Unable to open $datafile.";
 200
 201                         # Lock file for writing.
 202                         flock FILE, 2;
 203
 204                         # Add account data to the file.
 205                         print FILE "$settings{'SERVICE'},$hostname,$domain,$settings{'PROXY'},$settings{'WILDCARDS'},$settings{'LOGIN'},$settings{'PASSWORD'},$settings{'ENABLED'}\n";
 206
 207                         # Close file after writing.
 208                         close(FILE);
 209
 210                         # Write out notice to logfile.
 211                         &General::log($Lang::tr{'ddns hostname added'});
 212
 213                 # Handle account edditing.
 214                 } elsif ($settings{'ACTION'} eq $Lang::tr{'update'}) {
 215                         # Open /var/ipfire/ddns/config for writing.
 216                         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 217
 218                         # Lock file for writing.
 219                         flock FILE, 2;
 220
 221                         my $id = 0;
 222
 223                         # Read file line by line.
 224                         foreach my $line (@current) {
 225                                 if ($settings{'ID'} eq $id) {
 226                                         print FILE "$settings{'SERVICE'},$hostname,$domain,$settings{'PROXY'},$settings{'WILDCARDS'},$settings{'LOGIN'},$settings{'PASSWORD'},$settings{'ENABLED'}\n";
 227                                 } else {
 228                                         print FILE "$line";
 229                                 }
 230
 231                                 # Increase $id.
 232                                 $id++;
 233                         }
 234
 235                         # Close file after writing.
 236                         close(FILE);
 237
 238                         # Write out notice to logfile.
 239                         &General::log($Lang::tr{'ddns hostname modified'});
 240                 }
 241
 242                 # Unset given CGI params.
 243                 undef %settings;
 244
 245                 # Update ddns config file.
 246                 &GenerateDDNSConfigFile();
 247         }
 248 }
 249
 250 #
 251 # Remove existing accounts.
 252 #
 253 if ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 254         # Open /var/ipfire/ddns/config for writing.
 255         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 256
 257         # Lock file for writing.
 258         flock FILE, 2;
 259
 260         my $id = 0;
 261
 262         # Read file line by line.
 263         foreach my $line (@current) {
 264                 # Write back every line, except the one we want to drop
 265                 # (identified by the ID)
 266                 unless ($settings{'ID'} eq $id) {
 267                         print FILE "$line";
 268                 }
 269
 270                 # Increase id.
 271                 $id++;
 272         }
 273
 274         # Close file after writing.
 275         close(FILE);
 276
 277         # Unset given CGI params.
 278         undef %settings;
 279
 280         # Write out notice to logfile.
 281         &General::log($Lang::tr{'ddns hostname removed'});
 282
 283         # Update ddns config file.
 284         &GenerateDDNSConfigFile();
 285 }
 286
 287 #
 288 # Read items for editing.
 289 #
 290 if ($settings{'ACTION'} eq $Lang::tr{'edit'}) {
 291         my $id = 0;
 292         my @temp;
 293
 294         # Read file line by line.
 295         foreach my $line (@current) {
 296                 if ($settings{'ID'} eq $id) {
 297                         # Remove newlines.
 298                         chomp($line);
 299
 300                         # Splitt lines (splitting element is a single ",") and save values into temp array.
 301                         @temp = split(/\,/,$line);
 302
 303                         $settings{'SERVICE'} = $temp[0];
 304                         $settings{'HOSTNAME'} = "$temp[1].$temp[2]";
 305                         $settings{'PROXY'} = $temp[3];
 306                         $settings{'WILDCARDS'} = $temp[4];
 307                         $settings{'LOGIN'} = $temp[5];
 308                         $settings{'PASSWORD'} = $temp[6];
 309                         $settings{'ENABLED'} = $temp[7];
 310                 }
 311
 312                 # Increase $id.
 313                 $id++;
 314         }
 315
 316         &GenerateDDNSConfigFile();
 317 }
 318
 319 #
 320 # Handle forced updates.
 321 #
 322 if ($settings{'ACTION'} eq $Lang::tr{'instant update'}) {
 323     system(@ddnsprog) == 0 or die "@ddnsprog failed: $?\n";
 324 }
 325
 326 #
 327 # Set default values.
 328 #
 329 if (! $settings{'ACTION'}) {
 330         $settings{'SERVICE'} = 'dyndns.org';
 331         $settings{'ENABLED'} = 'on';
 332 }
 333
 334 &Header::openpage($Lang::tr{'dynamic dns'}, 1, '');
 335 &Header::openbigbox('100%', 'left', '', $errormessage);
 336
 337 # Read file for general ddns settings.
 338 &General::readhash($settingsfile, \%settings);
 339
 340 my %checked =();
 341 $checked{'BEHINDROUTER'}{'RED_IP'} = '';
 342 $checked{'BEHINDROUTER'}{'FETCH_IP'} = '';
 343 $checked{'BEHINDROUTER'}{$settings{'BEHINDROUTER'}} = "checked='checked'";
 344
 345 $checked{'ENABLED'}{'on'} = '';
 346 $checked{'ENABLED'}{'off'} = '';
 347 $checked{'ENABLED'}{$settings{'ENABLED'}} = "checked='checked'";
 348
 349 # Show box for errormessages..
 350 if ($errormessage) {
 351     &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 352     print "<font class='base'>$errormessage&nbsp;</font>";
 353     &Header::closebox();
 354 }
 355
 356 &Header::openbox('100%', 'left', $Lang::tr{'settings'});
 357
 358 ##
 359 # Section for general ddns setup.
 360 print <<END
 361 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 362 <table width='100%'>
 363         <tr>
 364                 <td class='base'>$Lang::tr{'dyn dns source choice'}</td>
 365         </tr>
 366         <tr>
 367                 <td class='base'><input type='radio' name='BEHINDROUTER' value='RED_IP' $checked{'BEHINDROUTER'}{'RED_IP'} />
 368                 $Lang::tr{'use ipfire red ip'}</td>
 369         </tr>
 370         <tr>
 371                 <td class='base'><input type='radio' name='BEHINDROUTER' value='FETCH_IP' $checked{'BEHINDROUTER'}{'FETCH_IP'} />
 372                 $Lang::tr{'fetch ip from'}</td>
 373         </tr>
 374 </table>
 375 <br />
 376 <hr />
 377
 378 <table width='100%'>
 379         <tr>
 380                 <td align='right' valign='top' class='base'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 381         </tr>
 382 </table>
 383 </form>
 384 END
 385 ;
 386
 387 &Header::closebox();
 388
 389 ##
 390 # Section to add or edit an existing entry.
 391
 392 # Default is add.
 393 my $buttontext = $Lang::tr{'add'};
 394
 395 # Change buttontext and headline if we edit an account.
 396 if ($settings{'ACTION'} eq $Lang::tr{'edit'}) {
 397         # Rename button and print headline for updating.
 398         $buttontext = $Lang::tr{'update'};
 399         &Header::openbox('100%', 'left', $Lang::tr{'edit an existing host'});
 400 } else {
 401         # Otherwise use default button text and show headline for adding a new account.
 402         &Header::openbox('100%', 'left', $Lang::tr{'add a host'});
 403 }
 404
 405 print <<END
 406 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 407 <input type='hidden' name='ID' value='$settings{'ID'}' />
 408 <table width='100%'>
 409         <tr>
 410                 <td width='25%' class='base'>$Lang::tr{'service'}:</td>
 411                 <td width='25%'>
 412 END
 413 ;
 414                 # Generate dropdown menu for service selection.
 415                 print"<select size='1' name='SERVICE'>\n";
 416
 417                 my $selected;
 418
 419                 # Loop to print the providerlist.
 420                 foreach my $provider (@providers) {
 421                         # Check if the current provider needs to be selected.
 422                         if ($provider eq $settings{'SERVICE'}) {
 423                                 $selected = 'selected';
 424                         } else {
 425                                 $selected = "";
 426                         }
 427
 428                         # Print out the HTML option field.
 429                         print "<option value=\"$provider\" $selected>$provider</option>\n";
 430                 }
 431
 432                 print"</select></td>\n";
 433 print <<END
 434                 <td width='20%' class='base'>$Lang::tr{'hostname'}:</td>
 435                 <td width='30%'><input type='text' name='HOSTNAME' value='$settings{'HOSTNAME'}' /></td>
 436         </tr>
 437
 438         <tr>
 439                 <td class='base'>$Lang::tr{'enabled'}</td>
 440                 <td><input type='checkbox' name='ENABLED' $checked{'ENABLED'}{'on'} /></td>
 441                 <td class='base'>$Lang::tr{'username'}</td>
 442                 <td><input type='text' name='LOGIN' value='$settings{'LOGIN'}' /></td>
 443         </tr>
 444
 445         <tr>
 446                 <td class='base'></td>
 447                 <td></td>
 448                 <td class='base'>$Lang::tr{'password'}</td>
 449                 <td><input type='password' name='PASSWORD' value='$settings{'PASSWORD'}' /></td>
 450         </tr>
 451 </table>
 452 <br>
 453 <hr>
 454
 455 <table width='100%'>
 456 <tr>
 457     <td width='30%' align='right' class='base'>
 458         <input type='hidden' name='ACTION' value='$buttontext'>
 459         <input type='submit' name='SUBMIT' value='$buttontext'></td>
 460 </tr>
 461 </table>
 462 </form>
 463 END
 464 ;
 465 &Header::closebox();
 466
 467 ##
 468 # Third section, display all created ddns hosts.
 469 # Re-open file to get changes.
 470 open(FILE, $datafile) or die "Unable to open $datafile.";
 471 @current = <FILE>;
 472 close(FILE);
 473
 474 # Get IP address of the red interface.
 475 my $ip = &General::GetDyndnsRedIP();
 476 my $id = 0;
 477 my $toggle_enabled;
 478
 479 if (@current) {
 480         &Header::openbox('100%', 'left', $Lang::tr{'current hosts'});
 481
 482         print <<END;
 483 <table width='100%' class='tbl'>
 484         <tr>
 485                 <th width='30%' align='center' class='boldbase'><b>$Lang::tr{'service'}</b></th>
 486                 <th width='50%' align='center' class='boldbase'><b>$Lang::tr{'hostname'}</b></th>
 487                 <th width='20%' colspan='3' class='boldbase' align='center'><b>$Lang::tr{'action'}</b></th>
 488         </tr>
 489 END
 490
 491         foreach my $line (@current) {
 492                 # Remove newlines.
 493                 chomp(@current);
 494                 my @temp = split(/\,/,$line);
 495
 496                 # Handle hostname details. Only connect the values with a dott if both are available.
 497                 my $hostname="";
 498
 499                 if (($temp[1]) && ($temp[2])) {
 500                         $hostname="$temp[1].$temp[2]";
 501                 } else {
 502                         $hostname="$temp[1]";
 503                 }
 504
 505                 # Generate value for enable/disable checkbox.
 506                 my $sync = '';
 507                 my $gif = '';
 508                 my $gdesc = '';
 509
 510                 if ($temp[7] eq "on") {
 511                         $gif = 'on.gif';
 512                         $gdesc = $Lang::tr{'click to disable'};
 513
 514                         # Check if the given hostname is a FQDN before doing a nslookup.
 515                         if (&General::validfqdn($hostname)) {
 516                                 $sync = (&General::DyndnsServiceSync ($ip,$temp[1], $temp[2]) ? "<font color='green'>": "<font color='red'>") ;
 517                         }
 518
 519                         $toggle_enabled = 'off';
 520                 } else {
 521                         $sync = "<font color='blue'>";
 522                         $gif = 'off.gif';
 523                         $gdesc = $Lang::tr{'click to enable'};
 524                         $toggle_enabled = 'on';
 525                 }
 526
 527                 # Background color.
 528                 my $col="";
 529
 530                 if ($settings{'ID'} eq $id) {
 531                         $col="bgcolor='${Header::colouryellow}'";
 532                 } elsif (!($temp[0] ~~ @providers)) {
 533                         $col="bgcolor='#FF4D4D'";
 534                 } elsif ($id % 2) {
 535                         $col="bgcolor='$color{'color20'}'";
 536                 } else {
 537                         $col="bgcolor='$color{'color22'}'";
 538                 }
 539
 540                 # The following HTML Code still is part of the loop.
 541                 print <<END;
 542 <tr>
 543         <td align='center' $col><a href='http://$temp[0]'>$temp[0]</a></td>
 544         <td align='center' $col>$sync$temp[1].$sync$temp[2]</td>
 545
 546         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 547                 <input type='hidden' name='ID' value='$id'>
 548                 <input type='hidden' name='ENABLED' value='$toggle_enabled'>
 549                 <input type='hidden' name='ACTION' value='$Lang::tr{'toggle enable disable'}' />
 550                 <input type='image' name='$Lang::tr{'toggle enable disable'}' src='/images/$gif' alt='$gdesc' title='$gdesc' />
 551         </form></td>
 552
 553         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 554                 <input type='hidden' name='ID' value='$id'>
 555                 <input type='hidden' name='ACTION' value='$Lang::tr{'edit'}' />
 556                 <input type='image' name='$Lang::tr{'edit'}' src='/images/edit.gif' alt='$Lang::tr{'edit'}' title='$Lang::tr{'edit'}' />
 557         </form></td>
 558
 559         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 560                 <input type='hidden' name='ID' value='$id'>
 561                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}' />
 562                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' alt='$Lang::tr{'remove'}' title='$Lang::tr{'remove'}' />
 563         </form></td>
 564 </tr>
 565 END
 566                 $id++;
 567         }
 568
 569         print <<END;
 570 </table>
 571 <table width='100%'>
 572         <tr>
 573                 <td class='boldbase'>&nbsp;<b>$Lang::tr{'legend'}:&nbsp;</b></td>
 574                 <td><img src='/images/on.gif' alt='$Lang::tr{'click to disable'}' /></td>
 575                 <td class='base'>$Lang::tr{'click to disable'}</td>
 576                 <td>&nbsp;&nbsp;</td>
 577                 <td><img src='/images/off.gif' alt='$Lang::tr{'click to enable'}' /></td>
 578                 <td class='base'>$Lang::tr{'click to enable'}</td>
 579                 <td>&nbsp;&nbsp;</td>
 580                 <td><img src='/images/edit.gif' alt='$Lang::tr{'edit'}' /></td>
 581                 <td class='base'>$Lang::tr{'edit'}</td>
 582                 <td>&nbsp;&nbsp;</td>
 583                 <td><img src='/images/delete.gif' alt='$Lang::tr{'remove'}' /></td>
 584                 <td class='base'>$Lang::tr{'remove'}</td>
 585                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 586                         <td align='right' width='30%'><input type='submit' name='ACTION' value='$Lang::tr{'instant update'}' /></td>
 587                 </form>
 588         </tr>
 589 </table>
 590 END
 591
 592         &Header::closebox();
 593 }
 594
 595 &Header::closebigbox();
 596 &Header::closepage();
 597
 598 # Function to generate the required configuration file for the DDNS tool.
 599 sub GenerateDDNSConfigFile {
 600         # Open datafile file
 601         open(SETTINGS, "<$datafile") or die "Could not open $datafile.";
 602
 603         open(FILE, ">${General::swroot}/ddns/ddns.conf");
 604
 605         # Global configuration options.
 606         print FILE "[config]\n";
 607
 608         # Check if we guess our IP address by an extranal server.
 609         if ($settings{'BEHINDROUTER'} eq "FETCH_IP") {
 610                 print FILE "guess_external_ip = true\n";
 611         } else {
 612                 print FILE "guess_external_ip = false\n";
 613         }
 614
 615         # Use an upstream proxy and generate proxy url.
 616         my %proxysettings;
 617         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 618         if ($proxysettings{'UPSTREAM_PROXY'}) {
 619                 my $proxy_string = "http://";
 620
 621                 if ($proxysettings{'UPSTREAM_USER'} && $proxysettings{'UPSTREAM_PASSWORD'}) {
 622                         $proxy_string .= "$proxysettings{'UPSTREAM_USER'}:$proxysettings{'UPSTREAM_PASSWORD'}@";
 623                 }
 624
 625                 $proxy_string .= $proxysettings{'UPSTREAM_PROXY'};
 626
 627                 print FILE "proxy = $proxy_string\n";
 628         }
 629
 630         print FILE "\n";
 631
 632         while (<SETTINGS>) {
 633                 my $line = $_;
 634                 chomp($line);
 635
 636                 # Generate array based on the line content (seperator is a single or multiple space's)
 637                 my @settings = split(/,/, $line);
 638                 my ($provider, $hostname, $domain, $proxy, $wildcards, $username, $password, $enabled) = @settings;
 639
 640                 # Skip entries if they are not (longer) supported.
 641                 next unless ($provider ~~ @providers);
 642
 643                 # Skip disabled entries.
 644                 next unless ($enabled eq "on");
 645
 646                 print FILE "[$hostname.$domain]\n";
 647                 print FILE "provider = $provider\n";
 648
 649                 my $use_token = 0;
 650
 651                 # Handle token based auth for various providers.
 652                 if ($provider ~~ ["dns.lightningwirelabs.com", "entrydns.net", "regfish.com"] && $username eq "token") {
 653                         $use_token = 1;
 654
 655                 # Handle token auth for freedns.afraid.org and regfish.com.
 656                 } elsif ($provider ~~ ["freedns.afraid.org", "regfish.com"] && $password eq "") {
 657                         $use_token = 1;
 658                         $password = $username;
 659
 660                 # Handle keys for nsupdate
 661                 } elsif (($provider eq "nsupdate") && $username && $password) {
 662                         print FILE "key = $username\n";
 663                         print FILE "secret = $password\n";
 664
 665                         $username = "";
 666                         $password = "";
 667
 668                 # Handle keys for nsupdate.info
 669                 } elsif (($provider eq "nsupdate.info") && $password) {
 670                         print FILE "secret = $password\n";
 671
 672                         $username = "";
 673                         $password = "";
 674                 }
 675
 676                 # Write auth details.
 677                 if ($use_token) {
 678                         print FILE "token = $password\n";
 679                 } elsif ($username && $password) {
 680                         print FILE "username = $username\n";
 681                         print FILE "password = $password\n";
 682                 }
 683
 684                 # These providers need to be set to only use IPv4.
 685                 if ($provider ~~ ["freedns.afraid.org", "nsupdate.info", "opendns.com", "variomedia.de", "zoneedit.com"]) {
 686                         print FILE "proto = ipv4\n";
 687                 }
 688
 689                 print FILE "\n";
 690         }
 691
 692         close(SETTINGS);
 693         close(FILE);
 694 }
 695
 696 # Function which generates an array (@providers) which contains the supported providers.
 697 sub GetProviders {
 698         # Get supported providers.
 699         open(PROVIDERS, "/usr/bin/ddns list-providers |");
 700
 701         # Create new array to store the providers.
 702         my @providers = ();
 703
 704         while (<PROVIDERS>) {
 705                 my $provider = $_;
 706
 707                 # Remove following newlines.
 708                 chomp($provider);
 709
 710                 # Add provider to the array.
 711                 push(@providers, $provider);
 712         }
 713
 714         close(PROVIDERS);
 715
 716         # Return our array.
 717         return @providers;
 718 }