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=$settings{'BEHINDROUTER'}\n";
 101         }
 102
 103         # Close file after writing.
 104         close(FILE);
 105
 106         # Update ddns config file.
 107         &GenerateDDNSConfigFile();
 108 }
 109
 110 #
 111 # Toggle enable/disable field.  Field is in second position
 112 #
 113 if ($settings{'ACTION'} eq $Lang::tr{'toggle enable disable'}) {
 114         # Open /var/ipfire/ddns/config for writing.
 115         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 116
 117         # Lock file for writing.
 118         flock FILE, 2;
 119
 120         my @temp;
 121         my $id = 0;
 122
 123         # Read file line by line.
 124         foreach my $line (@current) {
 125                 # Remove newlines.
 126                 chomp($line);
 127
 128                 if ($settings{'ID'} eq $id) {
 129                         # Splitt lines (splitting element is a single ",") and save values into temp array.
 130                         @temp = split(/\,/,$line);
 131
 132                         # Check if we want to toggle ENABLED or WILDCARDS.
 133                         if ($settings{'ENABLED'} ne '') {
 134                                 # Update ENABLED.
 135                                 print FILE "$temp[0],$temp[1],$temp[2],$temp[3],$temp[4],$temp[5],$temp[6],$settings{'ENABLED'}\n";
 136                         }
 137                 } else {
 138                         # Print unmodified line.
 139                         print FILE "$line\n";
 140                 }
 141
 142                 # Increase $id.
 143                 $id++;
 144         }
 145         undef $settings{'ID'};
 146
 147         # Close file after writing.
 148         close(FILE);
 149
 150         # Write out logging notice.
 151         &General::log($Lang::tr{'ddns hostname modified'});
 152
 153         # Update ddns config file.
 154         &GenerateDDNSConfigFile();
 155 }
 156
 157 #
 158 # Add new accounts, or edit existing ones.
 159 #
 160 if (($settings{'ACTION'} eq $Lang::tr{'add'}) || ($settings{'ACTION'} eq $Lang::tr{'update'})) {
 161         # Check if a hostname has been given.
 162         if ($settings{'HOSTNAME'} eq '') {
 163                 $errormessage = $Lang::tr{'hostname not set'};
 164         }
 165
 166         # Check if a valid domainname has been provided.
 167         if (!&General::validdomainname($settings{'HOSTNAME'})) {
 168                 $errormessage = $Lang::tr{'invalid domain name'};
 169         }
 170
 171         # Check if a username has been sent.
 172         if ($settings{'LOGIN'} eq '') {
 173                 $errormessage = $Lang::tr{'username not set'};
 174         }
 175
 176         # Check if a password has been typed in.
 177         # freedns.afraid.org does not require this field.
 178         if (($settings{'PASSWORD'} eq '') && ($settings{'SERVICE'} ne 'freedns.afraid.org') && ($settings{'SERVICE'} ne 'regfish.com')) {
 179                 $errormessage = $Lang::tr{'password not set'};
 180         }
 181
 182         # Go furter if there was no error.
 183         if (!$errormessage) {
 184                 # Splitt hostname field into 2 parts for storrage.
 185                 my($hostname, $domain) = split(/\./, $settings{'HOSTNAME'}, 2);
 186
 187                 # Handle enabled checkbox. When the checkbox is selected a "on" will be returned,
 188                 # if the checkbox is not checked nothing is returned in this case we set the value to "off".
 189                 if ($settings{'ENABLED'} ne 'on') {
 190                         $settings{'ENABLED'} = 'off';
 191                 }
 192
 193                 # Handle adding new accounts.
 194                 if ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 195                         # Open /var/ipfire/ddns/config for writing.
 196                         open(FILE, ">>$datafile") or die "Unable to open $datafile.";
 197
 198                         # Lock file for writing.
 199                         flock FILE, 2;
 200
 201                         # Add account data to the file.
 202                         print FILE "$settings{'SERVICE'},$hostname,$domain,$settings{'PROXY'},$settings{'WILDCARDS'},$settings{'LOGIN'},$settings{'PASSWORD'},$settings{'ENABLED'}\n";
 203
 204                         # Close file after writing.
 205                         close(FILE);
 206
 207                         # Write out notice to logfile.
 208                         &General::log($Lang::tr{'ddns hostname added'});
 209
 210                 # Handle account edditing.
 211                 } elsif ($settings{'ACTION'} eq $Lang::tr{'update'}) {
 212                         # Open /var/ipfire/ddns/config for writing.
 213                         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 214
 215                         # Lock file for writing.
 216                         flock FILE, 2;
 217
 218                         my $id = 0;
 219
 220                         # Read file line by line.
 221                         foreach my $line (@current) {
 222                                 if ($settings{'ID'} eq $id) {
 223                                         print FILE "$settings{'SERVICE'},$hostname,$domain,$settings{'PROXY'},$settings{'WILDCARDS'},$settings{'LOGIN'},$settings{'PASSWORD'},$settings{'ENABLED'}\n";
 224                                 } else {
 225                                         print FILE "$line";
 226                                 }
 227
 228                                 # Increase $id.
 229                                 $id++;
 230                         }
 231
 232                         # Close file after writing.
 233                         close(FILE);
 234
 235                         # Write out notice to logfile.
 236                         &General::log($Lang::tr{'ddns hostname modified'});
 237                 }
 238                 undef $settings{'ID'};
 239
 240                 # Update ddns config file.
 241                 &GenerateDDNSConfigFile();
 242         }
 243 }
 244
 245 #
 246 # Remove existing accounts.
 247 #
 248 if ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 249         # Open /var/ipfire/ddns/config for writing.
 250         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 251
 252         # Lock file for writing.
 253         flock FILE, 2;
 254
 255         my $id = 0;
 256
 257         # Read file line by line.
 258         foreach my $line (@current) {
 259                 # Write back every line, except the one we want to drop
 260                 # (identified by the ID)
 261                 unless ($settings{'ID'} eq $id) {
 262                         print FILE "$line";
 263                 }
 264
 265                 # Increase id.
 266                 $id++;
 267         }
 268         undef $settings{'ID'};
 269
 270         # Close file after writing.
 271         close(FILE);
 272
 273         # Write out notice to logfile.
 274         &General::log($Lang::tr{'ddns hostname removed'});
 275
 276         # Update ddns config file.
 277         &GenerateDDNSConfigFile();
 278 }
 279
 280 #
 281 # Read items for editing.
 282 #
 283 if ($settings{'ACTION'} eq $Lang::tr{'edit'}) {
 284         my $id = 0;
 285         my @temp;
 286
 287         # Read file line by line.
 288         foreach my $line (@current) {
 289                 if ($settings{'ID'} eq $id) {
 290                         # Remove newlines.
 291                         chomp($line);
 292
 293                         # Splitt lines (splitting element is a single ",") and save values into temp array.
 294                         @temp = split(/\,/,$line);
 295
 296                         # Handle hostname details. Only connect the values with a dott if both are available.
 297                         my $hostname;
 298
 299                         if (($temp[1]) && ($temp[2])) {
 300                                 $hostname = "$temp[1].$temp[2]";
 301                         } else {
 302                                 $hostname = "$temp[1]";
 303                         }
 304
 305                         $settings{'SERVICE'} = $temp[0];
 306                         $settings{'HOSTNAME'} = $hostname;
 307                         $settings{'PROXY'} = $temp[3];
 308                         $settings{'WILDCARDS'} = $temp[4];
 309                         $settings{'LOGIN'} = $temp[5];
 310                         $settings{'PASSWORD'} = $temp[6];
 311                         $settings{'ENABLED'} = $temp[7];
 312                 }
 313
 314                 # Increase $id.
 315                 $id++;
 316         }
 317
 318         &GenerateDDNSConfigFile();
 319 }
 320
 321 #
 322 # Handle forced updates.
 323 #
 324 if ($settings{'ACTION'} eq $Lang::tr{'instant update'}) {
 325     system(@ddnsprog) == 0 or die "@ddnsprog failed: $?\n";
 326 }
 327
 328 #
 329 # Set default values.
 330 #
 331 if (!$settings{'ACTION'}) {
 332         $settings{'SERVICE'} = 'dyndns.org';
 333         $settings{'ENABLED'} = 'on';
 334         $settings{'ID'} = '';
 335 }
 336
 337 &Header::openpage($Lang::tr{'dynamic dns'}, 1, '');
 338 &Header::openbigbox('100%', 'left', '', $errormessage);
 339
 340 # Read file for general ddns settings.
 341 &General::readhash($settingsfile, \%settings);
 342
 343 my %checked =();
 344 $checked{'BEHINDROUTER'}{'RED_IP'} = '';
 345 $checked{'BEHINDROUTER'}{'FETCH_IP'} = '';
 346 $checked{'BEHINDROUTER'}{$settings{'BEHINDROUTER'}} = "checked='checked'";
 347
 348 $checked{'ENABLED'}{'on'} = '';
 349 $checked{'ENABLED'}{'off'} = '';
 350 $checked{'ENABLED'}{$settings{'ENABLED'}} = "checked='checked'";
 351
 352 # Show box for errormessages..
 353 if ($errormessage) {
 354     &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 355     print "<font class='base'>$errormessage&nbsp;</font>";
 356     &Header::closebox();
 357 }
 358
 359 &Header::openbox('100%', 'left', $Lang::tr{'settings'});
 360
 361 ##
 362 # Section for general ddns setup.
 363 print <<END
 364 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 365 <table width='100%'>
 366         <tr>
 367                 <td class='base'>$Lang::tr{'dyn dns source choice'}</td>
 368         </tr>
 369         <tr>
 370                 <td class='base'><input type='radio' name='BEHINDROUTER' value='RED_IP' $checked{'BEHINDROUTER'}{'RED_IP'} />
 371                 $Lang::tr{'use ipfire red ip'}</td>
 372         </tr>
 373         <tr>
 374                 <td class='base'><input type='radio' name='BEHINDROUTER' value='FETCH_IP' $checked{'BEHINDROUTER'}{'FETCH_IP'} />
 375                 $Lang::tr{'fetch ip from'}</td>
 376         </tr>
 377 </table>
 378 <br />
 379 <hr />
 380
 381 <table width='100%'>
 382         <tr>
 383                 <td align='right' valign='top' class='base'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 384         </tr>
 385 </table>
 386 </form>
 387 END
 388 ;
 389
 390 &Header::closebox();
 391
 392 ##
 393 # Section to add or edit an existing entry.
 394
 395 # Default is add.
 396 my $buttontext = $Lang::tr{'add'};
 397
 398 # Change buttontext and headline if we edit an account.
 399 if ($settings{'ACTION'} eq $Lang::tr{'edit'}) {
 400         # Rename button and print headline for updating.
 401         $buttontext = $Lang::tr{'update'};
 402         &Header::openbox('100%', 'left', $Lang::tr{'edit an existing host'});
 403 } else {
 404         # Otherwise use default button text and show headline for adding a new account.
 405         &Header::openbox('100%', 'left', $Lang::tr{'add a host'});
 406 }
 407
 408 print <<END
 409 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 410 <input type='hidden' name='ID' value='$settings{'ID'}' />
 411 <table width='100%'>
 412         <tr>
 413                 <td width='25%' class='base'>$Lang::tr{'service'}:</td>
 414                 <td width='25%'>
 415 END
 416 ;
 417                 # Generate dropdown menu for service selection.
 418                 print"<select size='1' name='SERVICE'>\n";
 419
 420                 my $selected;
 421
 422                 # Loop to print the providerlist.
 423                 foreach my $provider (@providers) {
 424                         # Check if the current provider needs to be selected.
 425                         if ($provider eq $settings{'SERVICE'}) {
 426                                 $selected = 'selected';
 427                         } else {
 428                                 $selected = "";
 429                         }
 430
 431                         # Print out the HTML option field.
 432                         print "<option value=\"$provider\" $selected>$provider</option>\n";
 433                 }
 434
 435                 print"</select></td>\n";
 436 print <<END
 437                 <td width='20%' class='base'>$Lang::tr{'hostname'}:</td>
 438                 <td width='30%'><input type='text' name='HOSTNAME' value='$settings{'HOSTNAME'}' /></td>
 439         </tr>
 440
 441         <tr>
 442                 <td class='base'>$Lang::tr{'enabled'}</td>
 443                 <td><input type='checkbox' name='ENABLED' $checked{'ENABLED'}{'on'} /></td>
 444                 <td class='base'>$Lang::tr{'username'}</td>
 445                 <td><input type='text' name='LOGIN' value='$settings{'LOGIN'}' /></td>
 446         </tr>
 447
 448         <tr>
 449                 <td class='base'></td>
 450                 <td></td>
 451                 <td class='base'>$Lang::tr{'password'}</td>
 452                 <td><input type='password' name='PASSWORD' value='$settings{'PASSWORD'}' /></td>
 453         </tr>
 454 </table>
 455 <br>
 456 <hr>
 457
 458 <table width='100%'>
 459 <tr>
 460     <td width='30%' align='right' class='base'>
 461         <input type='hidden' name='ACTION' value='$buttontext'>
 462         <input type='submit' name='SUBMIT' value='$buttontext'></td>
 463 </tr>
 464 </table>
 465 </form>
 466 END
 467 ;
 468 &Header::closebox();
 469
 470 ##
 471 # Third section, display all created ddns hosts.
 472 # Re-open file to get changes.
 473 open(FILE, $datafile) or die "Unable to open $datafile.";
 474 @current = <FILE>;
 475 close(FILE);
 476
 477 # Get IP address of the red interface.
 478 my $ip = &General::GetDyndnsRedIP();
 479 my $id = 0;
 480 my $toggle_enabled;
 481
 482 if (@current) {
 483         &Header::openbox('100%', 'left', $Lang::tr{'current hosts'});
 484
 485         print <<END;
 486 <table width='100%' class='tbl'>
 487         <tr>
 488                 <th width='30%' align='center' class='boldbase'><b>$Lang::tr{'service'}</b></th>
 489                 <th width='50%' align='center' class='boldbase'><b>$Lang::tr{'hostname'}</b></th>
 490                 <th width='20%' colspan='3' class='boldbase' align='center'><b>$Lang::tr{'action'}</b></th>
 491         </tr>
 492 END
 493
 494         foreach my $line (@current) {
 495                 # Remove newlines.
 496                 chomp(@current);
 497                 my @temp = split(/\,/,$line);
 498
 499                 # Handle hostname details. Only connect the values with a dott if both are available.
 500                 my $hostname="";
 501
 502                 if (($temp[1]) && ($temp[2])) {
 503                         $hostname="$temp[1].$temp[2]";
 504                 } else {
 505                         $hostname="$temp[1]";
 506                 }
 507
 508                 # Generate value for enable/disable checkbox.
 509                 my $sync = '';
 510                 my $gif = '';
 511                 my $gdesc = '';
 512
 513                 if ($temp[7] eq "on") {
 514                         $gif = 'on.gif';
 515                         $gdesc = $Lang::tr{'click to disable'};
 516
 517                         # Check if the given hostname is a FQDN before doing a nslookup.
 518                         if (&General::validfqdn($hostname)) {
 519                                 $sync = (&General::DyndnsServiceSync ($ip,$temp[1], $temp[2]) ? "<font color='green'>": "<font color='red'>") ;
 520                         }
 521
 522                         $toggle_enabled = 'off';
 523                 } else {
 524                         $sync = "<font color='blue'>";
 525                         $gif = 'off.gif';
 526                         $gdesc = $Lang::tr{'click to enable'};
 527                         $toggle_enabled = 'on';
 528                 }
 529
 530                 # Background color.
 531                 my $col="";
 532
 533                 if ($settings{'ID'} eq $id) {
 534                         $col="bgcolor='${Header::colouryellow}'";
 535                 } elsif (!($temp[0] ~~ @providers)) {
 536                         $col="bgcolor='#FF4D4D'";
 537                 } elsif ($id % 2) {
 538                         $col="bgcolor='$color{'color20'}'";
 539                 } else {
 540                         $col="bgcolor='$color{'color22'}'";
 541                 }
 542
 543                 # Handle hostname details. Only connect the values with a dott if both are available.
 544                 my $hostname="";
 545
 546                 if (($temp[1]) && ($temp[2])) {
 547                         $hostname="$temp[1].$temp[2]";
 548                 } else {
 549                         $hostname="$temp[1]";
 550                 }
 551
 552                 # The following HTML Code still is part of the loop.
 553                 print <<END;
 554 <tr>
 555         <td align='center' $col><a href='http://$temp[0]'>$temp[0]</a></td>
 556         <td align='center' $col>$sync$hostname</td>
 557
 558         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 559                 <input type='hidden' name='ID' value='$id'>
 560                 <input type='hidden' name='ENABLED' value='$toggle_enabled'>
 561                 <input type='hidden' name='ACTION' value='$Lang::tr{'toggle enable disable'}' />
 562                 <input type='image' name='$Lang::tr{'toggle enable disable'}' src='/images/$gif' alt='$gdesc' title='$gdesc' />
 563         </form></td>
 564
 565         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 566                 <input type='hidden' name='ID' value='$id'>
 567                 <input type='hidden' name='ACTION' value='$Lang::tr{'edit'}' />
 568                 <input type='image' name='$Lang::tr{'edit'}' src='/images/edit.gif' alt='$Lang::tr{'edit'}' title='$Lang::tr{'edit'}' />
 569         </form></td>
 570
 571         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 572                 <input type='hidden' name='ID' value='$id'>
 573                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}' />
 574                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' alt='$Lang::tr{'remove'}' title='$Lang::tr{'remove'}' />
 575         </form></td>
 576 </tr>
 577 END
 578                 $id++;
 579         }
 580
 581         print <<END;
 582 </table>
 583 <table width='100%'>
 584         <tr>
 585                 <td class='boldbase'>&nbsp;<b>$Lang::tr{'legend'}:&nbsp;</b></td>
 586                 <td><img src='/images/on.gif' alt='$Lang::tr{'click to disable'}' /></td>
 587                 <td class='base'>$Lang::tr{'click to disable'}</td>
 588                 <td>&nbsp;&nbsp;</td>
 589                 <td><img src='/images/off.gif' alt='$Lang::tr{'click to enable'}' /></td>
 590                 <td class='base'>$Lang::tr{'click to enable'}</td>
 591                 <td>&nbsp;&nbsp;</td>
 592                 <td><img src='/images/edit.gif' alt='$Lang::tr{'edit'}' /></td>
 593                 <td class='base'>$Lang::tr{'edit'}</td>
 594                 <td>&nbsp;&nbsp;</td>
 595                 <td><img src='/images/delete.gif' alt='$Lang::tr{'remove'}' /></td>
 596                 <td class='base'>$Lang::tr{'remove'}</td>
 597                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 598                         <td align='right' width='30%'><input type='submit' name='ACTION' value='$Lang::tr{'instant update'}' /></td>
 599                 </form>
 600         </tr>
 601 </table>
 602 END
 603
 604         &Header::closebox();
 605 }
 606
 607 &Header::closebigbox();
 608 &Header::closepage();
 609
 610 # Function to generate the required configuration file for the DDNS tool.
 611 sub GenerateDDNSConfigFile {
 612         # Open datafile file
 613         open(SETTINGS, "<$datafile") or die "Could not open $datafile.";
 614
 615         open(FILE, ">${General::swroot}/ddns/ddns.conf");
 616
 617         # Global configuration options.
 618         print FILE "[config]\n";
 619
 620         # Check if we guess our IP address by an extranal server.
 621         if ($settings{'BEHINDROUTER'} eq "FETCH_IP") {
 622                 print FILE "guess_external_ip = true\n";
 623         } else {
 624                 print FILE "guess_external_ip = false\n";
 625         }
 626
 627         # Use an upstream proxy and generate proxy url.
 628         my %proxysettings;
 629         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 630         if ($proxysettings{'UPSTREAM_PROXY'}) {
 631                 my $proxy_string = "http://";
 632
 633                 if ($proxysettings{'UPSTREAM_USER'} && $proxysettings{'UPSTREAM_PASSWORD'}) {
 634                         $proxy_string .= "$proxysettings{'UPSTREAM_USER'}:$proxysettings{'UPSTREAM_PASSWORD'}@";
 635                 }
 636
 637                 $proxy_string .= $proxysettings{'UPSTREAM_PROXY'};
 638
 639                 print FILE "proxy = $proxy_string\n";
 640         }
 641
 642         print FILE "\n";
 643
 644         while (<SETTINGS>) {
 645                 my $line = $_;
 646                 chomp($line);
 647
 648                 # Generate array based on the line content (seperator is a single or multiple space's)
 649                 my @settings = split(/,/, $line);
 650                 my ($provider, $hostname, $domain, $proxy, $wildcards, $username, $password, $enabled) = @settings;
 651
 652                 # Skip entries if they are not (longer) supported.
 653                 next unless ($provider ~~ @providers);
 654
 655                 # Skip disabled entries.
 656                 next unless ($enabled eq "on");
 657
 658                 # Handle hostname details. Only connect the values with a dott if both are available.
 659                 if (($hostname) && ($domain)) {
 660                         print FILE "[$hostname.$domain]\n";
 661                 } else {
 662                         print FILE "[$hostname]\n";
 663                 }
 664
 665                 print FILE "provider = $provider\n";
 666
 667                 my $use_token = 0;
 668
 669                 # Handle token based auth for various providers.
 670                 if ($provider ~~ ["dns.lightningwirelabs.com", "entrydns.net", "regfish.com"] && $username eq "token") {
 671                         $use_token = 1;
 672
 673                 # Handle token auth for freedns.afraid.org and regfish.com.
 674                 } elsif ($provider ~~ ["freedns.afraid.org", "regfish.com"] && $password eq "") {
 675                         $use_token = 1;
 676                         $password = $username;
 677
 678                 # Handle keys for nsupdate
 679                 } elsif (($provider eq "nsupdate") && $username && $password) {
 680                         print FILE "key = $username\n";
 681                         print FILE "secret = $password\n";
 682
 683                         $username = "";
 684                         $password = "";
 685
 686                 # Handle keys for nsupdate.info
 687                 } elsif (($provider eq "nsupdate.info") && $password) {
 688                         print FILE "secret = $password\n";
 689
 690                         $username = "";
 691                         $password = "";
 692                 }
 693
 694                 # Write auth details.
 695                 if ($use_token) {
 696                         print FILE "token = $password\n";
 697                 } elsif ($username && $password) {
 698                         print FILE "username = $username\n";
 699                         print FILE "password = $password\n";
 700                 }
 701
 702                 # These providers need to be set to only use IPv4.
 703                 if ($provider ~~ ["freedns.afraid.org", "nsupdate.info", "opendns.com", "variomedia.de", "zoneedit.com"]) {
 704                         print FILE "proto = ipv4\n";
 705                 }
 706
 707                 print FILE "\n";
 708         }
 709
 710         close(SETTINGS);
 711         close(FILE);
 712 }
 713
 714 # Function which generates an array (@providers) which contains the supported providers.
 715 sub GetProviders {
 716         # Get supported providers.
 717         open(PROVIDERS, "/usr/bin/ddns list-providers |");
 718
 719         # Create new array to store the providers.
 720         my @providers = ();
 721
 722         while (<PROVIDERS>) {
 723                 my $provider = $_;
 724
 725                 # Remove following newlines.
 726                 chomp($provider);
 727
 728                 # Add provider to the array.
 729                 push(@providers, $provider);
 730         }
 731
 732         close(PROVIDERS);
 733
 734         # Return our array.
 735         return @providers;
 736 }