2 ###############################################################################
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2020 IPFire Development Team #
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. #
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. #
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/>. #
20 ###############################################################################
25 # enable only the following on debugging purpose
27 #use CGI::Carp 'fatalsToBrowser';
29 require '/var/ipfire/general-functions.pl';
30 require "${General::swroot}/location-functions.pl";
31 require "${General::swroot}/ids-functions.pl";
32 require "${General::swroot}/lang.pl";
33 require "${General::swroot}/header.pl";
35 #workaround to suppress a warning when a variable is used only once
36 my @dummy = ( ${Header
::colouryellow
} );
42 my $errormessage = '';
44 # Config file which stores the DNS settings.
45 my $settings_file = "${General::swroot}/dns/settings";
47 # File which stores the configured DNS-Servers.
48 my $servers_file = "${General::swroot}/dns/servers";
50 # Create files if the does not exist.
51 unless (-f
$settings_file) { system("touch $settings_file") };
52 unless (-f
$servers_file) { system("touch $servers_file") };
54 # File which stores the ISP assigned DNS servers.
55 my @ISP_nameserver_files = ( "/var/run/dns1", "/var/run/dns2" );
57 # File which contains the ca-certificates.
58 my $ca_certs_file = "/etc/ssl/certs/ca-bundle.crt";
60 # Server which is used, to determine if the whole DNS system works properly.
61 my $dns_test_server = "ping.ipfire.org";
66 my %mainsettings = ();
67 &General
::readhash
("${General::swroot}/main/settings", \
%mainsettings);
68 &General
::readhash
("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \
%color);
70 &Header
::showhttpheaders
();
71 &Header
::getcgihash
(\
%cgiparams);
74 # Save general settings.
76 if ($cgiparams{'GENERAL'} eq $Lang::tr
{'save'}) {
77 # Prevent form name from been stored in conf file.
78 delete $cgiparams{'GENERAL'};
80 # Add value for non-checked checkbox.
81 if ($cgiparams{'USE_ISP_NAMESERVERS'} ne "on") {
82 $cgiparams{'USE_ISP_NAMESERVERS'} = "off";
85 # Add value for non-checked checkbox.
86 if ($cgiparams{'ENABLE_SAFE_SEARCH'} ne "on") {
87 $cgiparams{'ENABLE_SAFE_SEARCH'} = "off";
90 # Check if using ISP nameservers and TLS is enabled at the same time.
91 if (($cgiparams{'USE_ISP_NAMESERVERS'} eq "on") && ($cgiparams{'PROTO'} eq "TLS")) {
92 $errormessage = $Lang::tr
{'dns isp nameservers and tls not allowed'}
95 # Check if there was an error.
96 if ( ! $errormessage) {
98 # Store settings into settings file.
99 &General
::writehash
("$settings_file", \
%cgiparams);
101 # Call function to handle unbound restart, etc.
102 &_handle_unbound_and_more
()
107 # Add / Edit entries.
109 if (($cgiparams{'SERVERS'} eq $Lang::tr
{'save'}) || ($cgiparams{'SERVERS'} eq $Lang::tr
{'update'})) {
110 # Hash to store the generic DNS settings.
113 # Read-in generic settings.
114 &General
::readhash
("$settings_file", \
%settings);
116 # Check if an IP-address has been given.
117 if ($cgiparams{"NAMESERVER"} eq "") {
118 $errormessage = "$Lang::tr{'dns no address given'}";
121 # Check if the given DNS server is valid.
122 elsif(!&General
::validip
($cgiparams{"NAMESERVER"})) {
123 $errormessage = "$Lang::tr{'invalid ip'}: $cgiparams{'NAMESERVER'}";
126 # Check if a TLS is enabled and no TLS_HOSTNAME has benn specified.
127 elsif($settings{'PROTO'} eq "TLS") {
128 unless($cgiparams{"TLS_HOSTNAME"}) {
129 $errormessage = "$Lang::tr{'dns no tls hostname given'}";
131 # Check if the provided domain is valid.
132 unless(&General
::validfqdn
($cgiparams{"TLS_HOSTNAME"})) {
133 $errormessage = "$Lang::tr{'invalid ip or hostname'}: $cgiparams{'TLS_HOSTNAME'}";
138 # Go further if there was no error.
139 if ( ! $errormessage) {
140 # Check if a remark has been entered.
141 $cgiparams{'REMARK'} = &Header
::cleanhtml
($cgiparams{'REMARK'});
143 my %dns_servers = ();
147 # Read-in configfile.
148 &General
::readhasharray
($servers_file, \
%dns_servers);
150 # Check if we should edit an existing entry and got an ID.
151 if (($cgiparams{'SERVERS'} eq $Lang::tr
{'update'}) && ($cgiparams{'ID'})) {
152 # Assin the provided id.
153 $id = $cgiparams{'ID'};
155 # Undef the given ID.
156 undef($cgiparams{'ID'});
158 # Grab the configured status of the corresponding entry.
159 $status = $dns_servers{$id}[2];
161 # Each newly added entry automatically should be enabled.
164 # Generate the ID for the new entry.
166 # Sort the keys by their ID and store them in an array.
167 my @keys = sort { $a <=> $b } keys %dns_servers;
169 # Reverse the key array.
170 my @reversed = reverse(@keys);
172 # Obtain the last used id.
173 my $last_id = @reversed[0];
175 # Increase the last id by one and use it as id for the new entry.
178 # The first allowed id is 3 to keep space for
179 # possible ISP assigned DNS servers.
185 # Add/Modify the entry to/in the dns_servers hash.
186 $dns_servers{$id} = ["$cgiparams{'NAMESERVER'}", "$cgiparams{'TLS_HOSTNAME'}", "$status", "$cgiparams{'REMARK'}"];
188 # Write the changed hash to the config file.
189 &General
::writehasharray
($servers_file, \
%dns_servers);
191 # Call function to handle unbound restart, etc.
192 &_handle_unbound_and_more
();
194 # Switch back to previous mode.
195 $cgiparams{'SERVERS'} = $cgiparams{'MODE'};
198 # Toggle enable / disable.
200 } elsif ($cgiparams{'SERVERS'} eq $Lang::tr
{'toggle enable disable'}) {
201 my %dns_servers = ();
203 # Only go further, if an ID has been passed.
204 if ($cgiparams{'ID'}) {
205 # Assign the given ID.
206 my $id = $cgiparams{'ID'};
208 # Undef the given ID.
209 undef($cgiparams{'ID'});
211 # Read-in configfile.
212 &General
::readhasharray
($servers_file, \
%dns_servers);
214 # Grab the configured status of the corresponding entry.
215 my $status = $dns_servers{$id}[2];
218 if ($status eq "disabled") {
221 $status = "disabled";
224 # Modify the status of the existing entry.
225 $dns_servers{$id} = ["$dns_servers{$id}[0]", "$dns_servers{$id}[1]", "$status", "$dns_servers{$id}[3]"];
227 # Write the changed hash back to the config file.
228 &General
::writehasharray
($servers_file, \
%dns_servers);
230 # Call function to handle unbound restart, etc.
231 &_handle_unbound_and_more
();
234 ## Remove entry from DNS servers list.
236 } elsif ($cgiparams{'SERVERS'} eq $Lang::tr
{'remove'}) {
237 my %dns_servers = ();
239 # Read-in configfile.
240 &General
::readhasharray
($servers_file, \
%dns_servers);
242 # Drop entry from the hash.
243 delete($dns_servers{$cgiparams{'ID'}});
245 # Undef the given ID.
246 undef($cgiparams{'ID'});
248 # Write the changed hash to the config file.
249 &General
::writehasharray
($servers_file, \
%dns_servers);
251 # Call function to handle unbound restart, etc.
252 &_handle_unbound_and_more
();
254 ## Handle request to check the servers.
256 } elsif ($cgiparams{'SERVERS'} eq $Lang::tr
{'dns check servers'}) {
260 # Hash to store the generic DNS settings.
263 # Read-in general DNS settings.
264 &General
::readhash
("$settings_file", \
%settings);
266 # Hash which contains the configured DNS servers.
267 my %dns_servers = ();
269 # Read-in config file.
270 &General
::readhasharray
("$servers_file", \
%dns_servers);
272 # Libloc database handle
273 my $libloc_db_handle = &Location
::Functions
::init
();
275 &Header
::openpage
($Lang::tr
{'dns'}, 1, '');
277 &Header
::openbigbox
('100%', 'left', '', $errormessage);
280 # Error messages layout.
283 &Header
::openbox
('100%', 'left', $Lang::tr
{'error messages'});
284 print "<class name='base'>$errormessage\n";
285 print " </class>\n";
289 # Handle if a nameserver should be added or edited.
290 if (($cgiparams{'SERVERS'} eq "$Lang::tr{'add'}") || ($cgiparams{'SERVERS'} eq "$Lang::tr{'edit'}")) {
291 # Display the sub page.
292 &show_add_edit_nameserver
();
295 &Header
::closebigbox
();
296 &Header
::closepage
();
298 # Finished here for the moment.
302 $cgiparams{'GENERAL'} = '';
303 $cgiparams{'SERVERS'} = '';
304 $cgiparams{'NAMESERVER'} = '';
305 $cgiparams{'TLS_HOSTNAME'} = '';
306 $cgiparams{'REMARK'} ='';
308 $checked{'USE_ISP_NAMESERVERS'}{'off'} = '';
309 $checked{'USE_ISP_NAMESERVERS'}{'on'} = '';
310 $checked{'USE_ISP_NAMESERVERS'}{$settings{'USE_ISP_NAMESERVERS'}} = "checked='checked'";
312 $checked{'ENABLE_SAFE_SEARCH'}{'off'} = '';
313 $checked{'ENABLE_SAFE_SEARCH'}{'on'} = '';
314 $checked{'ENABLE_SAFE_SEARCH'}{$settings{'ENABLE_SAFE_SEARCH'}} = "checked='checked'";
316 $selected{'PROTO'}{'UDP'} = '';
317 $selected{'PROTO'}{'TLS'} = '';
318 $selected{'PROTO'}{'TCP'} = '';
319 $selected{'PROTO'}{$settings{'PROTO'}} = "selected='selected'";
321 $selected{'QNAME_MIN'}{'standard'} = '';
322 $selected{'QNAME_MIN'}{'strict'} = '';
323 $selected{'QNAME_MIN'}{$settings{'QNAME_MIN'}} = "selected='selected'";
325 # Display nameserver and configuration sections.
327 &show_general_dns_configuration
();
329 &Header
::closebigbox
();
330 &Header
::closepage
();
333 # General DNS-Servers sektion.
335 sub show_general_dns_configuration
() {
336 &Header
::openbox
('100%', 'center', "$Lang::tr{'dns configuration'}");
339 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
343 $Lang::tr{'dns use isp assigned nameservers'}
347 <input type="checkbox" name="USE_ISP_NAMESERVERS" $checked{'USE_ISP_NAMESERVERS'}{'on'}>
359 $Lang::tr{'dns use protocol for dns queries'}
363 <select name="PROTO">
364 <option value="UDP" $selected{'PROTO'}{'UDP'}>UDP</option>
365 <option value="TLS" $selected{'PROTO'}{'TLS'}>TLS</option>
366 <option value="TCP" $selected{'PROTO'}{'TCP'}>TCP</option>
379 $Lang::tr{'dns enable safe-search'}
383 <input type="checkbox" name="ENABLE_SAFE_SEARCH" $checked{'ENABLE_SAFE_SEARCH'}{'on'}>
395 $Lang::tr{'dns mode for qname minimisation'}
399 <select name="QNAME_MIN">
400 <option value="standard" $selected{'QNAME_MIN'}{'standard'}>$Lang::tr{'standard'}</option>
401 <option value="strict" $selected{'QNAME_MIN'}{'strict'}>$Lang::tr{'strict'}</option>
407 <td colspan="2" align="right">
408 <input type="submit" name="GENERAL" value="$Lang::tr{'save'}">
419 # Section to display the configured and used DNS servers.
421 sub show_nameservers
() {
422 &Header
::openbox
('100%', 'center', "$Lang::tr{'dns title'}");
424 # Determine if we are running in recursor mode
426 my $unbound_forward = qx(unbound
-control forward
);
427 if ($unbound_forward =~ m/^off/) {
431 my $dns_status_string;
436 # Test if the DNS system is working.
438 # Simple send a request to unbound and check if it can resolve the
440 my $dns_status_ret = &check_nameserver
("127.0.0.1", "$dns_test_server", "UDP", undef, "+timeout=5", "+retry=0");
442 if ($dns_status_ret eq "2") {
443 $dns_status_string = "$Lang::tr{'working'}";
444 $dns_status_col = "${Header::colourgreen}";
447 $dns_status_string = "$Lang::tr{'broken'}";
448 $dns_status_col = "${Header::colourred}";
452 $dns_status_string .= " (" . $Lang::tr
{'dns recursor mode'} . ")";
459 <strong>$Lang::tr{'status'}: </strong>
460 <strong><font color='$dns_status_col'>$dns_status_string</font></strong>
466 # Check the usage of ISP assigned nameservers is enabled.
469 # Loop through the array which stores the files.
470 foreach my $file (@ISP_nameserver_files) {
471 # Grab the address of the nameserver.
472 my $address = &General
::grab_address_from_file
($file);
474 # Check if we got an address.
476 # Add the address to the hash of nameservers.
477 $dns_servers{$id} = [ "$address", "none",
478 ($settings{'USE_ISP_NAMESERVERS'} eq "on") ?
"enabled" : "disabled",
479 "$Lang::tr{'dns isp assigned nameserver'}" ];
481 # Increase id by one.
486 # Check some DNS servers have been configured. In this case
487 # the hash contains at least one key.
489 if (keys %dns_servers) {
490 # Sort the keys by their ID and store them in an array.
491 my @keys = sort { $a <=> $b } keys %dns_servers;
496 <table class="tbl" width='100%'>
499 <strong>$Lang::tr{'nameserver'}</strong>
503 <strong>$Lang::tr{'country'}</strong>
507 <strong>$Lang::tr{'rdns'}</strong>
511 <strong>$Lang::tr{'remark'}</strong>
515 # Check if the status should be displayed.
516 if ($check_servers) {
519 <strong>$Lang::tr{'status'}</strong>
526 <td align="center" colspan="3">
527 <strong>$Lang::tr{'action'}</strong>
532 # Loop through all entries of the array/hash.
533 foreach my $id (@keys) {
534 # Inrease server_amount.
537 # Assign data array positions to some nice variable names.
538 my $nameserver = $dns_servers{$id}[0];
539 my $tls_hostname = $dns_servers{$id}[1];
540 my $enabled = $dns_servers{$id}[2];
541 my $remark = $dns_servers{$id}[3];
550 if ($server_amount % 2) {
551 $col="bgcolor='$color{'color22'}'"; }
553 $col="bgcolor='$color{'color20'}'";
556 if ($enabled eq 'enabled') {
557 $gif='on.gif'; $toggle='off'; $gdesc=$Lang::tr
{'click to disable'};
559 $gif='off.gif'; $toggle='on'; $gdesc=$Lang::tr
{'click to enable'};
567 # Only grab the status if the nameserver is enabled.
568 if (($check_servers) && ($enabled eq "enabled")) {
569 $status = &check_nameserver
("$nameserver", "ping.ipfire.org", "$settings{'PROTO'}", "$tls_hostname");
572 if (!defined $status) {
573 $status_short = "$Lang::tr{'disabled'}";
575 # DNSSEC Not supported
576 } elsif ($status eq 0) {
577 $status_short = "$Lang::tr{'broken'}";
578 $status_message = $Lang::tr
{'dnssec not supported'};
579 $status_colour = ${Header
::colourred
};
582 } elsif ($status eq 1) {
583 $status_short = "$Lang::tr{'not validating'}";
584 $status_message = $Lang::tr
{'dnssec aware'};
585 $status_colour = ${Header
::colourblack
};
588 } elsif ($status eq 2) {
589 $status_short = "$Lang::tr{'ok'}";
590 $status_message = $Lang::tr
{'dnssec validating'};
591 $status_colour = ${Header
::colourgreen
};
595 $status_short = "$Lang::tr{'error'}";
596 $status_message = $status;
597 $status_colour = ${Header
::colourred
};
600 # collect more information about name server (rDNS, country code)
601 my $ccode = &Location
::Functions
::lookup_country_code
($libloc_db_handle, $nameserver);
602 my $flag_icon = &Location
::Functions
::get_flag_icon
($ccode);
606 # Only do the reverse lookup if the system is online.
608 my $iaddr = inet_aton
($nameserver);
609 $rdns = gethostbyaddr($iaddr, AF_INET
);
612 if (!$rdns) { $rdns = $Lang::tr
{'lookup failed'}; }
614 # Mark ISP name servers as disabled
615 if ($id <= 2 && $enabled eq "disabled") {
616 $nameserver = "<del>$nameserver</del>";
621 <td align="center" $col>
625 <td align="center" $col>
626 <a href='country.cgi#$ccode'><img src="$flag_icon" border="0" alt="$ccode" title="$ccode" /></a>
629 <td align="center" $col>
633 <td align="center" $col>
638 # Display server status if requested.
639 if ($check_servers) {
641 <td align="center" $col>
642 <strong><font color="$status_colour"><abbr title="$status_message">$status_short</abbr></font></strong>
648 # Check if the id is greater than "2".
650 # Nameservers with an ID's of one or two are ISP assigned,
651 # and we cannot perform any actions on them, so hide the tools for
656 <td align='center' width='5%' $col>
657 <form method='post' name='frma$id' action='$ENV{'SCRIPT_NAME'}'>
658 <input type='image' name='$Lang::tr{'toggle enable disable'}' src='/images/$gif' title='$gdesc' alt='$gdesc' />
659 <input type='hidden' name='ID' value='$id' />
660 <input type='hidden' name='ENABLE' value='$toggle' />
661 <input type='hidden' name='SERVERS' value='$Lang::tr{'toggle enable disable'}' />
665 <td align='center' width='5%' $col>
666 <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
667 <input type='image' name='$Lang::tr{'edit'}' src='/images/edit.gif' title='$Lang::tr{'edit'}' alt='$Lang::tr{'edit'}' />
668 <input type='hidden' name='ID' value='$id' />
669 <input type='hidden' name='SERVERS' value='$Lang::tr{'edit'}' />
673 <td align='center' width='5%' $col>
674 <form method='post' name='frmc$id' action='$ENV{'SCRIPT_NAME'}'>
675 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}' />
676 <input type='hidden' name='ID' value='$id' />
677 <input type='hidden' name='SERVERS' value='$Lang::tr{'remove'}' />
683 print "<td colspan='3' $col> </td>\n";
693 print"<table width='100%'>\n";
695 # Check if the usage of the ISP nameservers is enabled and there are more than 2 servers.
696 if (($settings{'USE_ISP_NAMESERVERS'} eq "on") && ($server_amount > 2)) {
699 <td class='boldbase'> <b>$Lang::tr{'legend'}:</b></td>
700 <td> <img src='/images/on.gif' alt='$Lang::tr{'click to disable'}' /></td>
701 <td class='base'>$Lang::tr{'click to disable'}</td>
702 <td> <img src='/images/off.gif' alt='$Lang::tr{'click to enable'}' /></td>
703 <td class='base'>$Lang::tr{'click to enable'}</td>
704 <td> <img src='/images/edit.gif' alt='$Lang::tr{'edit'}' /></td>
705 <td class='base'>$Lang::tr{'edit'}</td>
706 <td> <img src='/images/delete.gif' alt='$Lang::tr{'remove'}' /></td>
707 <td class='base'>$Lang::tr{'remove'}</td>
714 <form method="post" action="$ENV{'SCRIPT_NAME'}">
715 <td colspan="9" align="right">
716 <input type="submit" name="SERVERS" value="$Lang::tr{'add'}">
717 <input type="submit" name="SERVERS" value="$Lang::tr{'dns check servers'}">
728 <form method="post" action="$ENV{'SCRIPT_NAME'}">
729 <td colspan="6" align="right"><input type="submit" name="SERVERS" value="$Lang::tr{'add'}"></td>
740 # Section to display the add or edit subpage.
742 sub show_add_edit_nameserver
() {
743 print "<form method='post' action='$ENV{'SCRIPT_NAME'}'>\n";
745 my $buttontext = $Lang::tr
{'save'};
748 if ($cgiparams{'SERVERS'} eq $Lang::tr
{'edit'}) {
749 &Header
::openbox
('100%', 'left', $Lang::tr
{'dnsforward edit an entry'});
751 # Update button text for upate the existing entry.
752 $buttontext = $Lang::tr
{'update'};
754 # Add hidden input for sending ID.
755 print"<input type='hidden' name='ID' value='$cgiparams{'ID'}'>\n";
757 # Check if an ID has been given.
758 if ($cgiparams{'ID'}) {
759 # Assign cgiparams values.
760 $cgiparams{'NAMESERVER'} = $dns_servers{$cgiparams{'ID'}}[0];
761 $cgiparams{'TLS_HOSTNAME'} = $dns_servers{$cgiparams{'ID'}}[1];
762 $cgiparams{'REMARK'} = $dns_servers{$cgiparams{'ID'}}[3];
765 &Header
::openbox
('100%', 'left', $Lang::tr
{'dnsforward add a new entry'});
768 my $tls_required_image;
770 # If the protocol is TLS, dispaly the required image.
771 if ($settings{'PROTO'} eq "TLS") {
772 $tls_required_image = "<img src='/blob.gif' alt='*'>";
775 # Add hidden input to store the mode.
776 print "<input type='hidden' name='MODE' value='$cgiparams{'SERVERS'}'>\n";
781 <td width='20%' class='base'>$Lang::tr{'ip address'}: <img src='/blob.gif' alt='*' /></td>
782 <td><input type='text' name='NAMESERVER' value='$cgiparams{"NAMESERVER"}' size='24' /></td>
787 <td width='20%' class='base'>$Lang::tr{'dns tls hostname'}: $tls_required_image</td>
788 <td><input type='text' name='TLS_HOSTNAME' value='$cgiparams{'TLS_HOSTNAME'}' size='24'></td>
793 <td width ='20%' class='base'>$Lang::tr{'remark'}:</td>
794 <td><input type='text' name='REMARK' value='$cgiparams{'REMARK'}' size='40' maxlength='50' /></td>
803 <td class='base' width='55%'><img src='/blob.gif' alt ='*' align='top' /> $Lang::tr{'required field'}</td>
804 <td width='40%' align='right'>
805 <input type="submit" name="SERVERS" value="$buttontext">
806 <input type="submit" name="SERVERS" value="$Lang::tr{'back'}">
819 # Private function to handle the restart of unbound and more.
820 sub _handle_unbound_and_more
() {
821 # Check if the IDS is running.
822 if(&IDS
::ids_is_running
()) {
823 # Re-generate the file which contains the DNS Server
825 &IDS
::generate_dns_servers_file
();
827 # Call suricatactrl to perform a reload.
828 &IDS
::call_suricatactrl
("restart");
831 system('/usr/local/bin/unboundctrl reload >/dev/null');
834 # Check if the system is online (RED is connected).
835 sub red_is_active
() {
836 # Check if the "active" file is present.
837 if ( -f
"${General::swroot}/red/active") {
841 # Return nothing - False.
846 # Function to check a given nameserver against propper work.
847 sub check_nameserver
($$$$$) {
848 my ($nameserver, $record, $proto, $tls_hostname, @args) = @_;
850 # Check if the system is online.
851 unless (&red_is_active
()) {
852 return "$Lang::tr{'system is offline'}";
856 my @command = ("kdig", "+dnssec",
857 "+bufsize=1232", @args);
859 # Handle different protols.
860 if ($proto eq "TCP") {
861 # Add TCP switch to the command.
862 push(@command, "+tcp");
864 } elsif($proto eq "TLS") {
865 # Add TLS switch to the command and provide the
866 # path to our file which contains the ca certs.
867 push(@command, "+tls-ca=$ca_certs_file");
869 # Check if a TLS hostname has been provided.
871 # Add TLS hostname to the command.
872 push(@command, "+tls-hostname=$tls_hostname");
874 return "$Lang::tr{'dns no tls hostname given'}";
878 # Add record to the command array.
879 push(@command, "$record");
881 # Add nameserver to the command array.
882 push(@command, "\@$nameserver");
884 # Connect to STDOUT and STDERR.
885 push(@command, "2>&1");
887 my @output = qx(@command);
888 my $output = join("", @output);
892 if ($output =~ m/status: (\w+)/) {
893 $status = ($1 eq "NOERROR");
901 while ($output =~ m/WARNING: (.*)/g) {
902 # Add the current grabbed warning to the warning string.
906 # Return the warning string, if we grabbed at least one.
913 if ($output =~ m/Flags: (.*);/) {
914 @flags = split(/ /, $1);
917 my $aware = ($output =~ m/RRSIG/);
918 my $validating = (grep(/ad;/, @flags));
920 return $aware + $validating;