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 # Hook to regenerate the configuration files, if cgi got called from command line.
  33 if ($ENV{"REMOTE_ADDR"} eq "") {
  34         &GenerateDDNSConfigFile();
  35         exit(0);
  36 }
  37
  38 #workaround to suppress a warning when a variable is used only once
  39 my @dummy = ( ${Header::table2colour}, ${Header::colouryellow} );
  40 undef (@dummy);
  41
  42 my %color = ();
  43 my %mainsettings = ();
  44 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  45 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  46
  47 # Config file for basic configuration.
  48 my $settingsfile = "${General::swroot}/ddns/settings";
  49
  50 # Config file to store the configured ddns providers.
  51 my $datafile = "${General::swroot}/ddns/config";
  52
  53 # Dynamic ddns programm call.
  54 my @ddnsprog = ("/usr/bin/ddns", "--config",
  55                 "/var/ipfire/ddns/ddns.conf",
  56                 "update-all", "--force" );
  57
  58 my %settings=();
  59 my $errormessage = '';
  60
  61 # DDNS General settings.
  62 $settings{'BEHINDROUTER'} = 'RED_IP';
  63
  64 # Account settings.
  65 $settings{'HOSTNAME'} = '';
  66 $settings{'DOMAIN'} = '';
  67 $settings{'LOGIN'} = '';
  68 $settings{'PASSWORD'} = '';
  69 $settings{'ENABLED'} = '';
  70 $settings{'PROXY'} = '';
  71 $settings{'SERVICE'} = '';
  72
  73 $settings{'ACTION'} = '';
  74
  75 &Header::showhttpheaders();
  76
  77 #Get GUI values
  78 &Header::getcgihash(\%settings);
  79
  80 # Read configuration file.
  81 open(FILE, "$datafile") or die "Unable to open $datafile.";
  82 my @current = <FILE>;
  83 close (FILE);
  84
  85 # Get supported ddns providers.
  86 my @providers = &GetProviders();
  87
  88 #
  89 # Save General Settings.
  90 #
  91 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
  92
  93         # Open /var/ipfire/ddns/settings for writing.
  94         open(FILE, ">$settingsfile") or die "Unable to open $settingsfile.";
  95
  96         # Lock file for writing.
  97         flock FILE, 2;
  98
  99         # Check if BEHINDROUTER has been configured.
 100         if ($settings{'BEHINDROUTER'} ne '') {
 101                 print FILE "BEHINDROUTER=$settings{'BEHINDROUTER'}\n";
 102         }
 103
 104         # Close file after writing.
 105         close(FILE);
 106
 107         # Unset given CGI parmas.
 108         undef %settings;
 109
 110         # Update ddns config file.
 111         &GenerateDDNSConfigFile();
 112 }
 113
 114 #
 115 # Toggle enable/disable field.  Field is in second position
 116 #
 117 if ($settings{'ACTION'} eq $Lang::tr{'toggle enable disable'}) {
 118
 119         # Open /var/ipfire/ddns/config for writing.
 120         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 121
 122         # Lock file for writing.
 123         flock FILE, 2;
 124
 125         my @temp;
 126         my $id = 0;
 127
 128         # Read file line by line.
 129         foreach my $line (@current) {
 130
 131                 # Remove newlines.
 132                 chomp($line);
 133
 134                 if ($settings{'ID'} eq $id) {
 135
 136                         # Splitt lines (splitting element is a single ",") and save values into temp array.
 137                         @temp = split(/\,/,$line);
 138
 139                         # Check if we want to toggle ENABLED or WILDCARDS.
 140                         if ($settings{'ENABLED'} ne '') {
 141
 142                                 # Update ENABLED.
 143                                 print FILE "$temp[0],$temp[1],$temp[2],$temp[3],$temp[4],$temp[5],$temp[6],$settings{'ENABLED'}\n";
 144                         }
 145                 } else {
 146
 147                         # Print unmodified line.
 148                         print FILE "$line\n";
 149                 }
 150
 151                 # Increase $id.
 152                 $id++;
 153         }
 154
 155         # Close file after writing.
 156         close(FILE);
 157
 158         # Unset given CGI params.
 159         undef %settings;
 160
 161         # Write out logging notice.
 162         &General::log($Lang::tr{'ddns hostname modified'});
 163
 164         # Update ddns config file.
 165         &GenerateDDNSConfigFile();
 166 }
 167
 168 #
 169 # Add new accounts, or edit existing ones.
 170 #
 171 if (($settings{'ACTION'} eq $Lang::tr{'add'}) || ($settings{'ACTION'} eq $Lang::tr{'update'})) {
 172
 173         # Check if a hostname has been given.
 174         if ($settings{'HOSTNAME'} eq '') {
 175                 $errormessage = $Lang::tr{'hostname not set'};
 176         }
 177
 178         # Check if a valid domainname has been provided.
 179         if (!&General::validdomainname($settings{'HOSTNAME'})) {
 180                 $errormessage = $Lang::tr{'invalid domain name'};
 181         }
 182
 183         # Check if a username has been sent.
 184         if ($settings{'LOGIN'} eq '') {
 185                 $errormessage = $Lang::tr{'username not set'};
 186         }
 187
 188         # Check if a password has been typed in.
 189         # freedns.afraid.org does not require this field.
 190         if (($settings{'PASSWORD'} eq '') && ($settings{'SERVICE'} ne 'freedns.afraid.org')) {
 191                 $errormessage = $Lang::tr{'password not set'};
 192         }
 193
 194         # Go furter if there was no error.
 195         if ( ! $errormessage) {
 196
 197                 # Splitt hostname field into 2 parts for storrage.
 198                 my($hostname, $domain) = split(/\./, $settings{'HOSTNAME'}, 2);
 199
 200                 # Handle adding new accounts.
 201                 if ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 202
 203                         # Open /var/ipfire/ddns/config for writing.
 204                         open(FILE, ">>$datafile") or die "Unable to open $datafile.";
 205
 206                         # Lock file for writing.
 207                         flock FILE, 2;
 208
 209                         # Add account data to the file.
 210                         print FILE "$settings{'SERVICE'},$hostname,$domain,$settings{'PROXY'},$settings{'WILDCARDS'},$settings{'LOGIN'},$settings{'PASSWORD'},$settings{'ENABLED'}\n";
 211
 212                         # Close file after writing.
 213                         close(FILE);
 214
 215                         # Write out notice to logfile.
 216                         &General::log($Lang::tr{'ddns hostname added'});
 217
 218                         # Update ddns config file.
 219
 220                 # Handle account edditing.
 221                 } elsif ($settings{'ACTION'} eq $Lang::tr{'update'}) {
 222
 223                         # Open /var/ipfire/ddns/config for writing.
 224                         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 225
 226                         # Lock file for writing.
 227                         flock FILE, 2;
 228
 229                         my $id = 0;
 230
 231                         # Read file line by line.
 232                         foreach my $line (@current) {
 233
 234                                 if ($settings{'ID'} eq $id) {
 235                                         print FILE "$settings{'SERVICE'},$hostname,$domain,$settings{'PROXY'},$settings{'WILDCARDS'},$settings{'LOGIN'},$settings{'PASSWORD'},$settings{'ENABLED'}\n";
 236                                 } else {
 237                                         print FILE "$line";
 238                                 }
 239
 240                                 # Increase $id.
 241                                 $id++;
 242                         }
 243
 244                         # Close file after writing.
 245                         close(FILE);
 246
 247                         # Write out notice to logfile.
 248                         &General::log($Lang::tr{'ddns hostname modified'});
 249                 }
 250
 251                 # Unset given CGI params.
 252                 undef %settings;
 253
 254                 # Update ddns config file.
 255                 &GenerateDDNSConfigFile();
 256         }
 257 }
 258
 259 #
 260 # Remove existing accounts.
 261 #
 262 if ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 263
 264         # Open /var/ipfire/ddns/config for writing.
 265         open(FILE, ">$datafile") or die "Unable to open $datafile.";
 266
 267         # Lock file for writing.
 268         flock FILE, 2;
 269
 270         my $id = 0;
 271
 272         # Read file line by line.
 273         foreach my $line (@current) {
 274
 275                 # Write back every line, except the one we want to drop
 276                 # (identified by the ID)
 277                 unless ($settings{'ID'} eq $id) {
 278                         print FILE "$line";
 279                 }
 280
 281                 # Increase id.
 282                 $id++;
 283         }
 284
 285         # Close file after writing.
 286         close(FILE);
 287
 288         # Unset given CGI params.
 289         undef %settings;
 290
 291         # Write out notice to logfile.
 292         &General::log($Lang::tr{'ddns hostname removed'});
 293
 294         # Update ddns config file.
 295         &GenerateDDNSConfigFile();
 296 }
 297
 298 #
 299 # Read items for editing.
 300 #
 301 if ($settings{'ACTION'} eq $Lang::tr{'edit'}) {
 302
 303         my $id = 0;
 304         my @temp;
 305
 306         # Read file line by line.
 307         foreach my $line (@current) {
 308
 309                 if ($settings{'ID'} eq $id) {
 310
 311                         # Remove newlines.
 312                         chomp($line);
 313
 314                         # Splitt lines (splitting element is a single ",") and save values into temp array.
 315                         @temp = split(/\,/,$line);
 316
 317                         $settings{'SERVICE'} = $temp[0];
 318                         $settings{'HOSTNAME'} = "$temp[1].$temp[2]";
 319                         $settings{'PROXY'} = $temp[3];
 320                         $settings{'WILDCARDS'} = $temp[4];
 321                         $settings{'LOGIN'} = $temp[5];
 322                         $settings{'PASSWORD'} = $temp[6];
 323                         $settings{'ENABLED'} = $temp[7];
 324                 }
 325         # Increase $id.
 326         $id++;
 327
 328         }
 329 }
 330
 331 #
 332 # Handle forced updates.
 333 #
 334 if ($settings{'ACTION'} eq $Lang::tr{'instant update'}) {
 335     system(@ddnsprog) == 0 or die "@ddnsprog failed: $?\n";
 336 }
 337
 338 #
 339 # Set default values.
 340 #
 341 if (! $settings{'ACTION'}) {
 342         $settings{'SERVICE'} = 'dyndns.org';
 343         $settings{'ENABLED'} = 'on';
 344 }
 345
 346 &Header::openpage($Lang::tr{'dynamic dns'}, 1, '');
 347 &Header::openbigbox('100%', 'left', '', $errormessage);
 348
 349 # Read file for general ddns settings.
 350 &General::readhash($settingsfile, \%settings);
 351
 352 my %checked =();
 353 $checked{'BEHINDROUTER'}{'RED_IP'} = '';
 354 $checked{'BEHINDROUTER'}{'FETCH_IP'} = '';
 355 $checked{'BEHINDROUTER'}{$settings{'BEHINDROUTER'}} = "checked='checked'";
 356
 357 $checked{'ENABLED'}{'on'} = ($settings{'ENABLED'} eq '' ) ? '' : "checked='checked'";
 358
 359 # Show box for errormessages..
 360 if ($errormessage) {
 361     &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 362     print "<font class='base'>$errormessage&nbsp;</font>";
 363     &Header::closebox();
 364 }
 365
 366 &Header::openbox('100%', 'left', $Lang::tr{'settings'});
 367
 368 ##
 369 # Section for general ddns setup.
 370 print <<END
 371 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 372 <table width='100%'>
 373         <tr>
 374                 <td class='base'>$Lang::tr{'dyn dns source choice'}</td>
 375         </tr>
 376         <tr>
 377                 <td class='base'><input type='radio' name='BEHINDROUTER' value='RED_IP' $checked{'BEHINDROUTER'}{'RED_IP'} />
 378                 $Lang::tr{'use ipfire red ip'}</td>
 379         </tr>
 380         <tr>
 381                 <td class='base'><input type='radio' name='BEHINDROUTER' value='FETCH_IP' $checked{'BEHINDROUTER'}{'FETCH_IP'} />
 382                 $Lang::tr{'fetch ip from'}</td>
 383         </tr>
 384 </table>
 385 <br />
 386 <hr />
 387
 388 <table width='100%'>
 389         <tr>
 390                 <td align='right' valign='top' class='base'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 391         </tr>
 392 </table>
 393 </form>
 394 END
 395 ;
 396
 397 &Header::closebox();
 398
 399 ##
 400 # Section to add or edit an existing entry.
 401
 402 # Default is add.
 403 my $buttontext = $Lang::tr{'add'};
 404
 405 # Change buttontext and headline if we edit an account.
 406 if ($settings{'ACTION'} eq $Lang::tr{'edit'}) {
 407
 408         # Rename button and print headline for updating.
 409         $buttontext = $Lang::tr{'update'};
 410         &Header::openbox('100%', 'left', $Lang::tr{'edit an existing host'});
 411 } else {
 412
 413         # Otherwise use default button text and show headline for adding a new account.
 414         &Header::openbox('100%', 'left', $Lang::tr{'add a host'});
 415 }
 416
 417 print <<END
 418
 419 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 420 <input type='hidden' name='ID' value='$settings{'ID'}' />
 421 <table width='100%'>
 422         <tr>
 423                 <td width='25%' class='base'>$Lang::tr{'service'}:</td>
 424                 <td width='25%'>
 425 END
 426 ;
 427                 # Generate dropdown menu for service selection.
 428                 print"<select size='1' name='SERVICE'>\n";
 429
 430                 my $selected;
 431
 432                 # Loop to print the providerlist.
 433                 foreach my $provider (@providers) {
 434
 435                         # Check if the current provider needs to be selected.
 436                         if ($provider eq $settings{'SERVICE'}) {
 437                                 $selected = 'selected';
 438                         } else {
 439                                 $selected = "";
 440                         }
 441
 442                         # Print out the HTML option field.
 443                         print "<option value=\"$provider\" $selected>$provider</option>\n";
 444                 }
 445
 446                 print"</select></td>\n";
 447 print <<END
 448                 <td width='20%' class='base'>$Lang::tr{'hostname'}:</td>
 449                 <td width='30%'><input type='text' name='HOSTNAME' value='$settings{'HOSTNAME'}' /></td>
 450         </tr>
 451
 452         <tr>
 453                 <td class='base'></td>
 454                 <td></td>
 455                 <td class='base'>$Lang::tr{'username'}:</td>
 456                 <td><input type='text' name='LOGIN' value='$settings{'LOGIN'}' /></td>
 457         </tr>
 458
 459         <tr>
 460                 <td class='base'></td>
 461                 <td></td>
 462                 <td class='base'>$Lang::tr{'password'}</td>
 463                 <td><input type='password' name='PASSWORD' value='$settings{'PASSWORD'}' /></td>
 464         </tr>
 465
 466         <tr>
 467                 <td class='base'>$Lang::tr{'enabled'}</td>
 468                 <td><input type='checkbox' name='ENABLED' value='on' $checked{'ENABLED'}{'on'} /></td>
 469                 <td class='base'></td>
 470                 <td></td>
 471         </tr>
 472 </table>
 473 <br>
 474 <hr>
 475
 476 <table width='100%'>
 477 <tr>
 478     <td width='30%' align='right' class='base'>
 479         <input type='hidden' name='ACTION' value='$buttontext'>
 480         <input type='submit' name='SUBMIT' value='$buttontext'></td>
 481 </tr>
 482 </table>
 483 </form>
 484 END
 485 ;
 486 &Header::closebox();
 487
 488 ##
 489 # Third section, display all created ddns hosts.
 490
 491 &Header::openbox('100%', 'left', $Lang::tr{'current hosts'});
 492 print <<END
 493 <table width='100%' class='tbl'>
 494         <tr>
 495                 <th width='30%' align='center' class='boldbase'><b>$Lang::tr{'service'}</b></th>
 496                 <th width='50%' align='center' class='boldbase'><b>$Lang::tr{'hostname'}</b></th>
 497                 <th width='20%' colspan='3' class='boldbase' align='center'><b>$Lang::tr{'action'}</b></th>
 498         </tr>
 499 END
 500 ;
 501
 502 # Re-open file to get changes.
 503 open(FILE, $datafile) or die "Unable to open $datafile.";
 504 @current = <FILE>;
 505 close(FILE);
 506
 507 # Get IP address of the red interface.
 508 my $ip = &General::GetDyndnsRedIP;
 509 my $id = 0;
 510 my $toggle_enabled;
 511
 512 foreach my $line (@current) {
 513
 514         # Remove newlines.
 515         chomp(@current);
 516         my @temp = split(/\,/,$line);
 517
 518         # Generate value for enable/disable checkbox.
 519         my $sync = "<font color='blue'>";
 520         my $gif = '';
 521         my $gdesc = '';
 522
 523         if ($temp[7] eq "on") {
 524                 $gif = 'on.gif';
 525                 $gdesc = $Lang::tr{'click to disable'};
 526                 $sync = (&General::DyndnsServiceSync ($ip,$temp[1], $temp[2]) ? "<font color='green'>": "<font color='red'>") ;
 527                 $toggle_enabled = 'off';
 528         } else {
 529                 $gif = 'off.gif';
 530                 $gdesc = $Lang::tr{'click to enable'};
 531                 $toggle_enabled = 'on';
 532         }
 533
 534         # Background color.
 535         my $col="";
 536
 537         if ($settings{'ID'} eq $id) {
 538                 $col="bgcolor='${Header::colouryellow}'";
 539         } elsif (!&General::is_part_of("$temp[0]", @providers)) {
 540                 $col="bgcolor='#FF4D4D'";
 541         } elsif ($id % 2) {
 542                 $col="bgcolor='$color{'color20'}'";
 543         } else {
 544                 $col="bgcolor='$color{'color22'}'";
 545         }
 546
 547 # The following HTML Code still is part of the loop.
 548 print <<END
 549 <tr>
 550         <td align='center' $col><a href='http://$temp[0]'>$temp[0]</a></td>
 551         <td align='center' $col>$sync$temp[1].$sync$temp[2]</td>
 552
 553         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 554                 <input type='hidden' name='ID' value='$id'>
 555                 <input type='hidden' name='ENABLED' value='$toggle_enabled'>
 556                 <input type='hidden' name='ACTION' value='$Lang::tr{'toggle enable disable'}' />
 557                 <input type='image' name='$Lang::tr{'toggle enable disable'}' src='/images/$gif' alt='$gdesc' title='$gdesc' />
 558         </form></td>
 559
 560         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 561                 <input type='hidden' name='ID' value='$id'>
 562                 <input type='hidden' name='ACTION' value='$Lang::tr{'edit'}' />
 563                 <input type='image' name='$Lang::tr{'edit'}' src='/images/edit.gif' alt='$Lang::tr{'edit'}' title='$Lang::tr{'edit'}' />
 564         </form></td>
 565
 566         <td align='center' $col><form method='post' action='$ENV{'SCRIPT_NAME'}'>
 567                 <input type='hidden' name='ID' value='$id'>
 568                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}' />
 569                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' alt='$Lang::tr{'remove'}' title='$Lang::tr{'remove'}' />
 570         </form></td>
 571 </tr>
 572 END
 573 ;
 574     $id++;
 575 }
 576 print "</table>";
 577
 578 # If table contains entries, print 'Key to action icons'
 579 if ($id) {
 580 print <<END
 581 <table width='100%'>
 582         <tr>
 583                 <td class='boldbase'>&nbsp;<b>$Lang::tr{'legend'}:&nbsp;</b></td>
 584                 <td><img src='/images/on.gif' alt='$Lang::tr{'click to disable'}' /></td>
 585                 <td class='base'>$Lang::tr{'click to disable'}</td>
 586                 <td>&nbsp;&nbsp;</td>
 587                 <td><img src='/images/off.gif' alt='$Lang::tr{'click to enable'}' /></td>
 588                 <td class='base'>$Lang::tr{'click to enable'}</td>
 589                 <td>&nbsp;&nbsp;</td>
 590                 <td><img src='/images/edit.gif' alt='$Lang::tr{'edit'}' /></td>
 591                 <td class='base'>$Lang::tr{'edit'}</td>
 592                 <td>&nbsp;&nbsp;</td>
 593                 <td><img src='/images/delete.gif' alt='$Lang::tr{'remove'}' /></td>
 594                 <td class='base'>$Lang::tr{'remove'}</td>
 595                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 596                         <td align='right' width='30%'><input type='submit' name='ACTION' value='$Lang::tr{'instant update'}' /></td>
 597                 </form>
 598         </tr>
 599 </table>
 600 END
 601 ;
 602 }
 603
 604 &Header::closebox();
 605 &Header::closebigbox();
 606 &Header::closepage();
 607
 608 # Function to generate the required configuration file for the DDNS tool.
 609 sub GenerateDDNSConfigFile {
 610         # Open datafile file
 611         open(SETTINGS, "<$datafile") or die "Could not open $datafile.";
 612
 613         open(FILE, ">${General::swroot}/ddns/ddns.conf");
 614
 615         # Global configuration options.
 616         print FILE "[config]\n";
 617
 618         # Check if we guess our IP address by an extranal server.
 619         if ($settings{'BEHINDROUTER'} eq "FETCH_IP") {
 620                 print FILE "guess_external_ip = true\n";
 621         } else {
 622                 print FILE "guess_external_ip = false\n";
 623         }
 624
 625         # Use an upstream proxy and generate proxy url.
 626         my %proxysettings;
 627         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 628         if ($proxysettings{'UPSTREAM_PROXY'}) {
 629                 my $proxy_string = "http://";
 630
 631                 if ($proxysettings{'UPSTREAM_USER'} && $proxysettings{'UPSTREAM_PASSWORD'}) {
 632                         $proxy_string .= "$proxysettings{'UPSTREAM_USER'}:$proxysettings{'UPSTREAM_PASSWORD'}@";
 633                 }
 634
 635                 $proxy_string .= $proxysettings{'UPSTREAM_PROXY'};
 636
 637                 print FILE "proxy = $proxy_string\n";
 638         }
 639
 640         print FILE "\n";
 641
 642         while (<SETTINGS>) {
 643                 my $line = $_;
 644
 645                 # Generate array based on the line content (seperator is a single or multiple space's)
 646                 my @settings = split(/,/, $line);
 647                 my ($provider, $hostname, $domain, $proxy, $wildcards, $username, $password, $enabled) = @settings;
 648
 649                 # Skip entries if they are not (longer) supported.
 650                 next if (!&General::is_part_of("$provider", @providers));
 651
 652                 # Skip disabled entries.
 653                 next if ($enabled eq "off");
 654
 655                 print FILE "[$hostname.$domain]\n";
 656                 print FILE "provider = $provider\n";
 657
 658                 my $use_token = 0;
 659
 660                 # Handle token based auth for various providers.
 661                 if ($provider ~~ ["dns.lightningwirelabs.com", "regfish.com"] && $username eq "token") {
 662                         $use_token = 1;
 663
 664                 # Handle token auth for freedns.afraid.org.
 665                 } elsif ($provider eq "freedns.afraid.org" && $password eq "") {
 666                         $use_token = 1;
 667                         $password = $username;
 668
 669                 # Handle keys for nsupdate
 670                 } elsif (($provider eq "nsupdate") && $username && $password) {
 671                         print FILE "key = $username\n";
 672                         print FILE "secret = $password\n";
 673
 674                         $username = "";
 675                         $password = "";
 676                 }
 677
 678                 # Write auth details.
 679                 if ($use_token) {
 680                         print FILE "token = $password\n";
 681                 } elsif ($username && $password) {
 682                         print FILE "username = $username\n";
 683                         print FILE "password = $password\n";
 684                 }
 685
 686                 # These providers need to be set to only use IPv4.
 687                 if ($provider ~~ ["freedns.afraid.org", "variomedia.de", "zoneedit.com"]) {
 688                         print FILE "proto = ipv4\n";
 689                 }
 690
 691                 print FILE "\n";
 692         }
 693
 694         close(SETTINGS);
 695         close(FILE);
 696 }
 697
 698 # Function which generates an array (@providers) which contains the supported providers.
 699 sub GetProviders {
 700         # Get supported providers.
 701         open(PROVIDERS, "/usr/bin/ddns list-providers |");
 702
 703         # Create new array to store the providers.
 704         my @providers = ();
 705
 706         while (<PROVIDERS>) {
 707                 my $provider = $_;
 708
 709                 # Remove following newlines.
 710                 chomp($provider);
 711
 712                 # Add provider to the array.
 713                 push(@providers, $provider);
 714         }
 715
 716         close(PROVIDERS);
 717
 718         # Return our array.
 719         return @providers;
 720 }