dnsmasq: Add feature to forward domains to certain DNS servers.
authorStefan Schantl <stefan.schantl@ipfire.org>
Sun, 14 Jul 2013 09:55:29 +0000 (11:55 +0200)
committerStefan Schantl <stefan.schantl@ipfire.org>
Sun, 14 Jul 2013 11:43:34 +0000 (13:43 +0200)
Fixes #10369.

config/menu/30-network.menu
html/cgi-bin/dnsforward.cgi [new file with mode: 0644]
langs/de/cgi-bin/de.pl
langs/en/cgi-bin/en.pl
src/initscripts/init.d/dnsmasq
src/misc-progs/Makefile
src/misc-progs/dnsmasqctrl.c [new file with mode: 0644]

index bb9205a..c50508f 100644 (file)
                                 'title' => "$Lang::tr{'edit hosts'}",
                                 'enabled' => 1,
                                 };
                                 'title' => "$Lang::tr{'edit hosts'}",
                                 'enabled' => 1,
                                 };
-    $subnetwork->{'51.routes'} = {
+    $subnetwork->{'51.dnsmenu'} = {
+                                  'caption' => $Lang::tr{'dns menu'},
+                                  'uri' => '/cgi-bin/dns.cgi',
+                                  'title' => "$Lang::tr{'dns menu'}",
+                                  'enabled' => `grep "RED_TYPE=DHCP" /var/ipfire/ethernet/settings`,
+                                  };
+    $subnetwork->{'52.dnsforward'} = {
+                                  'caption' => $Lang::tr{'dnsforward'},
+                                  'uri' => '/cgi-bin/dnsforward.cgi',
+                                  'title' => "$Lang::tr{'dnsforward'}",
+                                  'enabled' => 1
+                                  };
+    $subnetwork->{'60.routes'} = {
                                 'caption' => $Lang::tr{'static routes'},
                                 'uri' => '/cgi-bin/routing.cgi',
                                 'title' => "$Lang::tr{'static routes'}",
                                 'enabled' => 1,
                                 };
                                 'caption' => $Lang::tr{'static routes'},
                                 'uri' => '/cgi-bin/routing.cgi',
                                 'title' => "$Lang::tr{'static routes'}",
                                 'enabled' => 1,
                                 };
-    $subnetwork->{'60.aliases'} = {
+    $subnetwork->{'70.aliases'} = {
                                  'caption' => $Lang::tr{'aliases'},
                                  'uri' => '/cgi-bin/aliases.cgi',
                                  'title' => "$Lang::tr{'aliases'}",
                                  'enabled' => `grep "RED_TYPE=STATIC" /var/ipfire/ethernet/settings`,
                                  };
                                  'caption' => $Lang::tr{'aliases'},
                                  'uri' => '/cgi-bin/aliases.cgi',
                                  'title' => "$Lang::tr{'aliases'}",
                                  'enabled' => `grep "RED_TYPE=STATIC" /var/ipfire/ethernet/settings`,
                                  };
-    $subnetwork->{'70.dnsmenu'} = {
-                                 'caption' => $Lang::tr{'dns menu'},
-                                 'uri' => '/cgi-bin/dns.cgi',
-                                 'title' => "$Lang::tr{'dns menu'}",
-                                 'enabled' => `grep "RED_TYPE=DHCP" /var/ipfire/ethernet/settings`,
-                                 };
     $subnetwork->{'80.macadressmenu'} = {
                                  'caption' => $Lang::tr{'mac address menu'},
                                  'uri' => '/cgi-bin/mac.cgi',
     $subnetwork->{'80.macadressmenu'} = {
                                  'caption' => $Lang::tr{'mac address menu'},
                                  'uri' => '/cgi-bin/mac.cgi',
diff --git a/html/cgi-bin/dnsforward.cgi b/html/cgi-bin/dnsforward.cgi
new file mode 100644 (file)
index 0000000..15d430c
--- /dev/null
@@ -0,0 +1,359 @@
+#!/usr/bin/perl
+###############################################################################
+#                                                                             #
+# IPFire.org - A linux based firewall                                         #
+# Copyright (C) 2013  IPFire Development Team                                 #
+#                                                                             #
+# This program is free software: you can redistribute it and/or modify        #
+# it under the terms of the GNU General Public License as published by        #
+# the Free Software Foundation, either version 3 of the License, or           #
+# (at your option) any later version.                                         #
+#                                                                             #
+# This program is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
+# GNU General Public License for more details.                                #
+#                                                                             #
+# You should have received a copy of the GNU General Public License           #
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
+#                                                                             #
+###############################################################################
+use strict;
+
+# enable only the following on debugging purpose
+#use warnings;
+#use CGI::Carp 'fatalsToBrowser';
+
+require '/var/ipfire/general-functions.pl';
+require "${General::swroot}/lang.pl";
+require "${General::swroot}/header.pl";
+
+#workaround to suppress a warning when a variable is used only once
+my @dummy = ( ${Header::colouryellow} );
+undef (@dummy);
+
+my %cgiparams=();
+my %checked=();
+my %selected=();
+my $errormessage = '';
+my $filename = "${General::swroot}/dnsforward/config";
+my $changed = 'no';
+
+my %color = ();
+my %mainsettings = ();
+&General::readhash("${General::swroot}/main/settings", \%mainsettings);
+&General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
+
+&Header::showhttpheaders();
+
+$cgiparams{'ENABLED'} = 'off';
+$cgiparams{'ACTION'} = '';
+$cgiparams{'ZONE'} = '';
+$cgiparams{'FORWARD_SERVER'} = '';
+$cgiparams{'REMARK'} ='';
+&Header::getcgihash(\%cgiparams);
+open(FILE, $filename) or die 'Unable to open config file.';
+my @current = <FILE>;
+close(FILE);
+
+###
+# Add / Edit entries.
+#
+if ($cgiparams{'ACTION'} eq $Lang::tr{'add'})
+{
+       # Check if the entered domainname is valid.
+       unless (&General::validdomainname($cgiparams{'ZONE'})) {
+               $errormessage = $Lang::tr{'invalid domain name'};
+       }
+
+       # Check if the settings for the forward server are valid.
+       unless(&General::validip($cgiparams{'FORWARD_SERVER'})) {
+               $errormessage = $Lang::tr{'invalid ip'};
+       }
+
+       # Go further if there was no error.
+       if ( ! $errormessage)
+       {
+           # Check if a remark has been entered.
+           $cgiparams{'REMARK'} = &Header::cleanhtml($cgiparams{'REMARK'});
+
+               # Check if we want to edit an existing or add a new entry.
+               if($cgiparams{'EDITING'} eq 'no') {
+                       open(FILE,">>$filename") or die 'Unable to open config file.';
+                       flock FILE, 2;
+                       print FILE "$cgiparams{'ENABLED'},$cgiparams{'ZONE'},$cgiparams{'FORWARD_SERVER'},$cgiparams{'REMARK'}\n";
+               } else {
+                       open(FILE, ">$filename") or die 'Unable to open config file.';
+                       flock FILE, 2;
+                       my $id = 0;
+                       foreach my $line (@current)
+                       {
+                               $id++;
+                               if ($cgiparams{'EDITING'} eq $id) {
+                                       print FILE "$cgiparams{'ENABLED'},$cgiparams{'ZONE'},$cgiparams{'FORWARD_SERVER'},$cgiparams{'REMARK'}\n";
+                               } else { print FILE "$line"; }
+                       }
+               }
+               close(FILE);
+               undef %cgiparams;
+               $changed = 'yes';
+       } else {
+               # stay on edit mode if an error occur
+               if ($cgiparams{'EDITING'} ne 'no')
+               {
+                       $cgiparams{'ACTION'} = $Lang::tr{'edit'};
+                       $cgiparams{'ID'} = $cgiparams{'EDITING'};
+               }
+       }
+       # Restart dnsmasq.
+       system('/usr/local/bin/dnsmasqctrl restart >/dev/null');
+}
+
+###
+# Remove existing entries.
+#
+if ($cgiparams{'ACTION'} eq $Lang::tr{'remove'})
+{
+       my $id = 0;
+       open(FILE, ">$filename") or die 'Unable to open config file.';
+       flock FILE, 2;
+       foreach my $line (@current)
+       {
+               $id++;
+               unless ($cgiparams{'ID'} eq $id) { print FILE "$line"; }
+       }
+       close(FILE);
+       # Restart dnsmasq.
+       system('/usr/local/bin/dnsmasqctrl restart >/dev/null');
+}
+
+###
+# Toggle Enable/Disable for entries.
+#
+if ($cgiparams{'ACTION'} eq $Lang::tr{'toggle enable disable'})
+{
+       open(FILE, ">$filename") or die 'Unable to open config file.';
+       flock FILE, 2;
+       my $id = 0;
+       foreach my $line (@current)
+       {
+               $id++;
+               unless ($cgiparams{'ID'} eq $id) { print FILE "$line"; }
+               else
+               {
+                       chomp($line);
+                       my @temp = split(/\,/,$line);
+                       print FILE "$cgiparams{'ENABLE'},$temp[1],$temp[2],$temp[3]\n";
+               }
+       }
+       close(FILE);
+       # Restart dnsmasq.
+       system('/usr/local/bin/dnsmasqctrl restart >/dev/null');
+}
+
+###
+# Read items for edit mode.
+#
+if ($cgiparams{'ACTION'} eq $Lang::tr{'edit'})
+{
+       my $id = 0;
+       foreach my $line (@current)
+       {
+               $id++;
+               if ($cgiparams{'ID'} eq $id)
+               {
+                       chomp($line);
+                       my @temp = split(/\,/,$line);
+                       $cgiparams{'ENABLED'} = $temp[0];
+                       $cgiparams{'ZONE'} = $temp[1];
+                       $cgiparams{'FORWARD_SERVER'} = $temp[2];
+                       $cgiparams{'REMARK'} = $temp[3];
+               }
+       }
+}
+
+$checked{'ENABLED'}{'off'} = '';
+$checked{'ENABLED'}{'on'} = '';
+$checked{'ENABLED'}{$cgiparams{'ENABLED'}} = "checked='checked'";
+
+&Header::openpage($Lang::tr{'dnsforward configuration'}, 1, '');
+
+&Header::openbigbox('100%', 'left', '', $errormessage);
+
+###
+# Error messages layout.
+#
+if ($errormessage) {
+       &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
+       print "<class name='base'>$errormessage\n";
+       print "&nbsp;</class>\n";
+       &Header::closebox();
+}
+
+print "<form method='post' action='$ENV{'SCRIPT_NAME'}'>\n";
+
+my $buttontext = $Lang::tr{'add'};
+if ($cgiparams{'ACTION'} eq $Lang::tr{'edit'}) {
+       &Header::openbox('100%', 'left', $Lang::tr{'dnsforward edit an entry'});
+       $buttontext = $Lang::tr{'update'};
+} else {
+       &Header::openbox('100%', 'left', $Lang::tr{'dnsforward add a new entry'});
+}
+
+###
+# Content of the main page.
+#
+print <<END
+<table width='100%'>
+       <tr>
+               <td width='20%' class='base'><font>$Lang::tr{'dnsforward zone'}:</font></td>
+               <td><input type='text' name='ZONE' value='$cgiparams{'ZONE'}' size='24' /></td>
+               <td width='30%' class='base'>$Lang::tr{'enabled'}<input type='checkbox' name='ENABLED' $checked{'ENABLED'}{'on'} /></td>
+       </tr>
+
+       <tr>
+               <td width='20%' class='base'><font>$Lang::tr{'dnsforward forward_server'}:</font></td>
+               <td><input type='text' name='FORWARD_SERVER' value='$cgiparams{'FORWARD_SERVER'}' size='24' /></td>
+       </tr>
+</table>
+
+<table width='100%'>
+       <tr>
+               <td width ='20%' class='base'><font class='boldbase'>$Lang::tr{'remark'}:</font>&nbsp;<img src='/blob.gif' alt='*' /></td>
+               <td><input type='text' name='REMARK' value='$cgiparams{'REMARK'}' size='40' maxlength='50' /></td>
+       </tr>
+</table>
+
+<hr>
+
+<table width='100%'>
+       <tr>
+               <td class='base' width='55%'><img src='/blob.gif' alt ='*' align='top' />&nbsp;<font class='base'>$Lang::tr{'this field may be blank'}</font></td>
+               <td width='40%' align='center'>
+                       <input type='hidden' name='ACTION' value='$Lang::tr{'add'}' />
+                       <input type='submit' name='SUBMIT' value='$buttontext' />
+               </td>
+       </tr>
+</table>
+END
+;
+if ($cgiparams{'ACTION'} eq $Lang::tr{'edit'}) {
+       print "<input type='hidden' name='EDITING' value='$cgiparams{'ID'}' />\n";
+} else {
+       print "<input type='hidden' name='EDITING' value='no' />\n";
+}
+
+&Header::closebox();
+print "</form>\n";
+
+###
+# Existing rules.
+#
+&Header::openbox('100%', 'left', $Lang::tr{'dnsforward entries'});
+print <<END
+<table width='100%'>
+       <tr>
+               <td width='35%' class='boldbase' align='center'><b>$Lang::tr{'dnsforward zone'}</b></td>
+               <td width='30%' class='boldbase' align='center'><b>$Lang::tr{'dnsforward forward_server'}</b></td>
+               <td width='30%' class='boldbase' align='center'><b>$Lang::tr{'remark'}</b></td>
+               <td width='5%' class='boldbase' colspan='3' align='center'><b>$Lang::tr{'action'}</b></td>
+       </tr>
+END
+;
+
+# If something has happened re-read config
+if($cgiparams{'ACTION'} ne '' or $changed ne 'no')
+{
+       open(FILE, $filename) or die 'Unable to open config file.';
+       @current = <FILE>;
+       close(FILE);
+}
+
+###
+# Re-read entries and highlight selected item for editing.
+#
+my $id = 0;
+foreach my $line (@current)
+{
+       $id++;
+       chomp($line);
+       my @temp = split(/\,/,$line);
+       my $toggle = '';
+       my $gif = '';
+       my $gdesc = '';
+       my $toggle = '';
+       
+       if($cgiparams{'ACTION'} eq $Lang::tr{'edit'} && $cgiparams{'ID'} eq $id) {
+               print "<tr bgcolor='${Header::colouryellow}'>\n"; }
+       elsif ($id % 2) {
+               print "<tr bgcolor='$color{'color22'}'>\n"; }
+       else {
+               print "<tr bgcolor='$color{'color20'}'>\n"; }
+
+       if ($temp[0] eq 'on') { $gif='on.gif'; $toggle='off'; $gdesc=$Lang::tr{'click to disable'};}
+       else { $gif='off.gif'; $toggle='on'; $gdesc=$Lang::tr{'click to enable'}; }
+
+###
+# Display edit page.
+#
+print <<END
+       <td align='center'>$temp[1]</td>
+       <td align='center'>$temp[2]</td>
+       <td align='center'>$temp[3]</td>
+       <td align='center'>
+               <form method='post' name='frma$id' action='$ENV{'SCRIPT_NAME'}'>
+                       <input type='image' name='$Lang::tr{'toggle enable disable'}' src='/images/$gif' title='$gdesc' alt='$gdesc' />
+                       <input type='hidden' name='ID' value='$id' />
+                       <input type='hidden' name='ENABLE' value='$toggle' />
+                       <input type='hidden' name='ACTION' value='$Lang::tr{'toggle enable disable'}' />
+               </form>
+       </td>
+       <td align='center'>
+               <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
+                       <input type='image' name='$Lang::tr{'edit'}' src='/images/edit.gif' title='$Lang::tr{'edit'}' alt='$Lang::tr{'edit'}' />
+                       <input type='hidden' name='ID' value='$id' />
+                       <input type='hidden' name='ACTION' value='$Lang::tr{'edit'}' />
+               </form>
+       </td>
+       <td align='center'>
+               <form method='post' name='frmc$id' action='$ENV{'SCRIPT_NAME'}'>
+                       <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}' />
+                       <input type='hidden' name='ID' value='$id' />
+                       <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}' />
+               </form>
+       </td>
+</tr>
+END
+       ;
+}
+print "</table>\n";
+
+###
+# Print the legend at the bottom if there are any configured entries.
+#
+# Check if the file size is zero - no existing entries.
+if ( ! -z "$filename") {
+print <<END
+<table>
+       <tr>
+               <td class='boldbase'>&nbsp; <b>$Lang::tr{'legend'}:</b></td>
+               <td>&nbsp; <img src='/images/on.gif' alt='$Lang::tr{'click to disable'}' /></td>
+               <td class='base'>$Lang::tr{'click to disable'}</td>
+               <td>&nbsp; &nbsp; <img src='/images/off.gif' alt='$Lang::tr{'click to enable'}' /></td>
+               <td class='base'>$Lang::tr{'click to enable'}</td>
+               <td>&nbsp; &nbsp; <img src='/images/edit.gif' alt='$Lang::tr{'edit'}' /></td>
+               <td class='base'>$Lang::tr{'edit'}</td>
+               <td>&nbsp; &nbsp; <img src='/images/delete.gif' alt='$Lang::tr{'remove'}' /></td>
+               <td class='base'>$Lang::tr{'remove'}</td>
+       </tr>
+</table>
+END
+;
+}
+
+&Header::closebox();
+
+&Header::closebigbox();
+
+&Header::closepage();
index 84b102f..6de84e4 100644 (file)
 'dns saved txt' => 'Die beiden eingegebenen DNS-Server-Adressen wurde erfolgreich gespeichert.<br/>Um die Änderung wirksam zu machen, müssen Sie neustarten oder wiederverbinden!',
 'dns server' => 'DNS Server',
 'dns title' => 'Domain Name System',
 'dns saved txt' => 'Die beiden eingegebenen DNS-Server-Adressen wurde erfolgreich gespeichert.<br/>Um die Änderung wirksam zu machen, müssen Sie neustarten oder wiederverbinden!',
 'dns server' => 'DNS Server',
 'dns title' => 'Domain Name System',
+'dnsforward' => 'DNS-Weiterleitung',
+'dnsforward add a new entry' => 'Neuen Eintrag hinzufügen:',
+'dnsforward configuration' => 'Einstellungen für DNS Weiterleitung',
+'dnsforward edit an entry' => 'Existierenden Eintrag bearbeiten:',
+'dnsforward entries' => 'Aktuelle Einträge:',
+'dnsforward forward_server' => 'DNS-Server',
+'dnsforward zone' => 'Zone',
 'do not log this port list' => 'Verwerfe diese Port-Liste kurz bevor sie protokolliert werden (reduziert Protokollgröße)',
 'dod' => 'Dial-on-Demand-Modus',
 'dod for dns' => 'Dial-on-Demand für DNS:',
 'do not log this port list' => 'Verwerfe diese Port-Liste kurz bevor sie protokolliert werden (reduziert Protokollgröße)',
 'dod' => 'Dial-on-Demand-Modus',
 'dod for dns' => 'Dial-on-Demand für DNS:',
index 8ff2608..7b92b7e 100644 (file)
 'dns saved txt' => 'The two entered DNS server addresses have been saved successfully.<br />You have to reboot or reconnect that the changes have effect!',
 'dns server' => 'DNS Server',
 'dns title' => 'Domain Name System',
 'dns saved txt' => 'The two entered DNS server addresses have been saved successfully.<br />You have to reboot or reconnect that the changes have effect!',
 'dns server' => 'DNS Server',
 'dns title' => 'Domain Name System',
+'dnsforward' => 'DNS forwarding',
+'dnsforward add a new entry' => 'Add a new entry:',
+'dnsforward configuration' => 'DNS forward configuration',
+'dnsforward edit an entry' => 'Edit an existing entry:',
+'dnsforward entries' => 'Current entries:',
+'dnsforward forward_server' => 'Nameserver',
+'dnsforward zone' => 'Zone',
 'do not log this port list' => 'Drop this port list just before they are logged (reduces log size)',
 'dod' => 'Dial on Demand',
 'dod for dns' => 'Dial on Demand for DNS:',
 'do not log this port list' => 'Drop this port list just before they are logged (reduces log size)',
 'dod' => 'Dial on Demand',
 'dod for dns' => 'Dial on Demand for DNS:',
index 1b2c0c2..a02097e 100644 (file)
@@ -22,6 +22,26 @@ fi
 
 SHOW_SRV=1
 
 
 SHOW_SRV=1
 
+function dns_forward_args() {
+       local file="${1}"
+
+       # Do nothing if file is empty.
+       [ -s "${file}" ] || return
+
+       local cmdline
+
+       local enabled zone server remark
+       while IFS="," read -r enabled zone server remark; do
+               # Line must be enabled.
+               [ "${enabled}" = "on" ] || continue
+
+               cmdline="${cmdline} --server=/${zone}/${server}"
+       done < ${file}
+
+       echo "${cmdline}"
+}
+
+
 case "${1}" in
        start)
                # kill already running copy of dnsmasq...
 case "${1}" in
        start)
                # kill already running copy of dnsmasq...
@@ -47,8 +67,12 @@ case "${1}" in
                    fi
                fi
                [ -e "/var/ipfire/red/active" ] && ARGS="$ARGS -r /var/ipfire/red/resolv.conf"
                    fi
                fi
                [ -e "/var/ipfire/red/active" ] && ARGS="$ARGS -r /var/ipfire/red/resolv.conf"
-               
+       
                ARGS="$ARGS --domain=`cat /var/ipfire/main/settings |grep DOMAIN |cut -d = -f 2`"
                ARGS="$ARGS --domain=`cat /var/ipfire/main/settings |grep DOMAIN |cut -d = -f 2`"
+
+               # Add custom forward dns zones.
+               ARGS="${ARGS} $(dns_forward_args /var/ipfire/dnsforward/config)"
+
                ARGS="$ARGS $CUSTOM_ARGS"
 
                loadproc /usr/sbin/dnsmasq -l /var/state/dhcp/dhcpd.leases $ARGS
                ARGS="$ARGS $CUSTOM_ARGS"
 
                loadproc /usr/sbin/dnsmasq -l /var/state/dhcp/dhcpd.leases $ARGS
index 0a4fda6..ac1d01f 100644 (file)
@@ -33,7 +33,7 @@ SUID_PROGS = setdmzholes setportfw setxtaccess \
        redctrl syslogdctrl extrahdctrl sambactrl upnpctrl tripwirectrl \
        smartctrl clamavctrl addonctrl pakfire mpfirectrl wlanapctrl \
        setaliases urlfilterctrl updxlratorctrl fireinfoctrl rebuildroutes \
        redctrl syslogdctrl extrahdctrl sambactrl upnpctrl tripwirectrl \
        smartctrl clamavctrl addonctrl pakfire mpfirectrl wlanapctrl \
        setaliases urlfilterctrl updxlratorctrl fireinfoctrl rebuildroutes \
-       getconntracktable wirelessclient
+       getconntracktable wirelessclient dnsmasqctrl
 SUID_UPDX = updxsetperms
 
 install : all
 SUID_UPDX = updxsetperms
 
 install : all
@@ -161,3 +161,6 @@ getconntracktable: getconntracktable.c setuid.o ../install+setup/libsmooth/varva
 
 wirelessclient: wirelessclient.c setuid.o ../install+setup/libsmooth/varval.o
        $(COMPILE) -I../install+setup/libsmooth/ wirelessclient.c setuid.o ../install+setup/libsmooth/varval.o -o $@
 
 wirelessclient: wirelessclient.c setuid.o ../install+setup/libsmooth/varval.o
        $(COMPILE) -I../install+setup/libsmooth/ wirelessclient.c setuid.o ../install+setup/libsmooth/varval.o -o $@
+
+dnsmasqctrl: dnsmasqctrl.c setuid.o ../install+setup/libsmooth/varval.o
+       $(COMPILE) -I../install+setup/libsmooth/ dnsmasqcrtl.c setuid.o ../install+setup/libsmooth/varval.o -o $@
diff --git a/src/misc-progs/dnsmasqctrl.c b/src/misc-progs/dnsmasqctrl.c
new file mode 100644 (file)
index 0000000..8ac3360
--- /dev/null
@@ -0,0 +1,34 @@
+/* This file is part of the IPFire Firewall.
+ *
+ * This program is distributed under the terms of the GNU General Public
+ * Licence.  See the file COPYING for details.
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include "setuid.h"
+
+int main(int argc, char *argv[]) {
+
+       if (!(initsetuid()))
+               exit(1);
+
+       if (argc < 2) {
+               fprintf(stderr, "\nNo argument given.\n\ndnsmasqctrl (restart)\n\n");
+               exit(1);
+       }
+
+       if (strcmp(argv[1], "restart") == 0) {
+               safe_system("/etc/rc.d/init.d/dnsmasq restart");
+       } else {
+               fprintf(stderr, "\nBad argument given.\n\ndnsmasqctrl (restart)\n\n");
+               exit(1);
+       }
+
+       return 0;
+}