.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
require("guiconfig.inc");
/* This function will remove entries from dhcpd.leases that would otherwise
* overlap with static DHCP reservations. If we don't clean these out,
* then DHCP will print a warning in the logs about a duplicate lease
*/
function dhcp_clean_leases() {
global $g, $config;
$leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd.leases";
if (!file_exists($leasesfile))
return;
/* Build list of static MACs */
$staticmacs = array();
foreach($config['interfaces'] as $ifname => $ifarr)
if (is_array($config['dhcpd'][$ifname]['staticmap']))
foreach($config['dhcpd'][$ifname]['staticmap'] as $static)
$staticmacs[] = $static['mac'];
/* Read existing leases */
$leases_contents = explode("\n", file_get_contents($leasesfile));
$newleases_contents = array();
$i=0;
while ($i < count($leases_contents)) {
/* Find a lease definition */
if (substr($leases_contents[$i], 0, 6) == "lease ") {
$templease = array();
$thismac = "";
/* Read to the end of the lease declaration */
do {
if (substr($leases_contents[$i], 0, 20) == " hardware ethernet ")
$thismac = substr($leases_contents[$i], 20, 17);
$templease[] = $leases_contents[$i];
$i++;
} while ($leases_contents[$i-1] != "}");
/* Check for a matching MAC address and if not present, keep it. */
if (! in_array($thismac, $staticmacs))
$newleases_contents = array_merge($newleases_contents, $templease);
} else {
/* It's a line we want to keep, copy it over. */
$newleases_contents[] = $leases_contents[$i];
$i++;
}
}
/* Write out the new leases file */
$fd = fopen($leasesfile, 'w');
fwrite($fd, implode("\n", $newleases_contents));
fclose($fd);
}
$if = $_GET['if'];
if ($_POST['if'])
$if = $_POST['if'];
/* if OLSRD is enabled, allow WAN to house DHCP. */
if($config['installedpackages']['olsrd']) {
foreach($config['installedpackages']['olsrd']['config'] as $olsrd) {
if($olsrd['enable']) {
$iflist = array("lan" => "LAN", "wan" => "WAN");
$is_olsr_enabled = true;
break;
}
}
}
if(!$iflist)
$iflist = array("lan" => "LAN");
for ($i = 1; isset($config['interfaces']['opt' . $i]); $i++) {
$oc = $config['interfaces']['opt' . $i];
if (isset($oc['enable']) && $oc['if'] && (!$oc['bridge'])) {
$iflist['opt' . $i] = $oc['descr'];
}
}
if (!$if || !isset($iflist[$if]))
$if = "lan";
$pconfig['range_from'] = $config['dhcpd'][$if]['range']['from'];
$pconfig['range_to'] = $config['dhcpd'][$if]['range']['to'];
$pconfig['deftime'] = $config['dhcpd'][$if]['defaultleasetime'];
$pconfig['maxtime'] = $config['dhcpd'][$if]['maxleasetime'];
$pconfig['gateway'] = $config['dhcpd'][$if]['gateway'];
list($pconfig['wins1'],$pconfig['wins2']) = $config['dhcpd'][$if]['winsserver'];
list($pconfig['dns1'],$pconfig['dns2']) = $config['dhcpd'][$if]['dnsserver'];
$pconfig['enable'] = isset($config['dhcpd'][$if]['enable']);
$pconfig['denyunknown'] = isset($config['dhcpd'][$if]['denyunknown']);
$pconfig['staticarp'] = isset($config['dhcpd'][$if]['staticarp']);
$pconfig['ddnsdomain'] = $config['dhcpd'][$if]['ddnsdomain'];
$pconfig['ddnsupdate'] = isset($config['dhcpd'][$if]['ddnsupdate']);
list($pconfig['ntp1'],$pconfig['ntp2']) = $config['dhcpd'][$if]['ntpserver'];
$pconfig['netboot'] = isset($config['dhcpd'][$if]['netboot']);
$pconfig['nextserver'] = $config['dhcpd'][$if]['next-server'];
$pconfig['filename'] = $config['dhcpd'][$if]['filename'];
$pconfig['failover_peerip'] = $config['dhcpd'][$if]['failover_peerip'];
$pconfig['netmask'] = $config['dhcpd'][$if]['netmask'];
$ifcfg = $config['interfaces'][$if];
/* set the enabled flag which will tell us if DHCP relay is enabled
* on any interface. We will use this to disable DHCP server since
* the two are not compatible with each other.
*/
$dhcrelay_enabled = false;
$dhcrelaycfg = $config['dhcrelay'];
if(is_array($dhcrelaycfg)) {
foreach ($dhcrelaycfg as $dhcrelayif => $dhcrelayifconf) {
if (isset($dhcrelayifconf['enable']) &&
(($dhcrelayif == "lan") ||
(isset($config['interfaces'][$dhcrelayif]['enable']) &&
$config['interfaces'][$dhcrelayif]['if'] && (!$config['interfaces'][$dhcrelayif]['bridge']))))
$dhcrelay_enabled = true;
}
}
if (!is_array($config['dhcpd'][$if]['staticmap'])) {
$config['dhcpd'][$if]['staticmap'] = array();
}
staticmaps_sort($if);
$a_maps = &$config['dhcpd'][$if]['staticmap'];
function is_inrange($test, $start, $end) {
if ( (ip2long($test) < ip2long($end)) && (ip2long($test) > ip2long($start)) )
return true;
else
return false;
}
if ($_POST) {
unset($input_errors);
$pconfig = $_POST;
/* input validation */
if ($_POST['enable']) {
$reqdfields = explode(" ", "range_from range_to");
$reqdfieldsn = explode(",", "Range begin,Range end");
do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors);
foreach($a_maps as $mapent) {
if(is_inrange($mapent['ipaddr'], $_POST['range_from'], $_POST['range_to'])) {
$input_errors[] = "{$mapent['ipaddr']} is inside the range you specified.";
}
}
if (($_POST['range_from'] && !is_ipaddr($_POST['range_from']))) {
$input_errors[] = "A valid range must be specified.";
}
if (($_POST['range_to'] && !is_ipaddr($_POST['range_to']))) {
$input_errors[] = "A valid range must be specified.";
}
if (($_POST['gateway'] && !is_ipaddr($_POST['gateway']))) {
$input_errors[] = "A valid IP address must be specified for the gateway.";
}
if (($_POST['wins1'] && !is_ipaddr($_POST['wins1'])) || ($_POST['wins2'] && !is_ipaddr($_POST['wins2']))) {
$input_errors[] = "A valid IP address must be specified for the primary/secondary WINS servers.";
}
if (($_POST['dns1'] && !is_ipaddr($_POST['dns1'])) || ($_POST['dns2'] && !is_ipaddr($_POST['dns2']))) {
$input_errors[] = "A valid IP address must be specified for the primary/secondary DNS servers.";
}
if ($_POST['deftime'] && (!is_numeric($_POST['deftime']) || ($_POST['deftime'] < 60))) {
$input_errors[] = "The default lease time must be at least 60 seconds.";
}
if ($_POST['maxtime'] && (!is_numeric($_POST['maxtime']) || ($_POST['maxtime'] < 60) || ($_POST['maxtime'] <= $_POST['deftime']))) {
$input_errors[] = "The maximum lease time must be at least 60 seconds and higher than the default lease time.";
}
if (($_POST['ddnsdomain'] && !is_domain($_POST['ddnsdomain']))) {
$input_errors[] = "A valid domain name must be specified for the dynamic DNS registration.";
}
if (($_POST['ntp1'] && !is_ipaddr($_POST['ntp1'])) || ($_POST['ntp2'] && !is_ipaddr($_POST['ntp2']))) {
$input_errors[] = "A valid IP address must be specified for the primary/secondary NTP servers.";
}
if (($_POST['nextserver'] && !is_ipaddr($_POST['nextserver']))) {
$input_errors[] = "A valid IP address must be specified for the network boot server.";
}
if (!$input_errors) {
/* make sure the range lies within the current subnet */
$subnet_start = (ip2long($ifcfg['ipaddr']) & gen_subnet_mask_long($ifcfg['subnet']));
$subnet_end = (ip2long($ifcfg['ipaddr']) | (~gen_subnet_mask_long($ifcfg['subnet'])));
if ((ip2long($_POST['range_from']) < $subnet_start) || (ip2long($_POST['range_from']) > $subnet_end) ||
(ip2long($_POST['range_to']) < $subnet_start) || (ip2long($_POST['range_to']) > $subnet_end)) {
$input_errors[] = "The specified range lies outside of the current subnet.";
}
if (ip2long($_POST['range_from']) > ip2long($_POST['range_to']))
$input_errors[] = "The range is invalid (first element higher than second element).";
/* make sure that the DHCP Relay isn't enabled on this interface */
if (isset($config['dhcrelay'][$if]['enable']))
$input_errors[] = "You must disable the DHCP relay on the {$iflist[$if]} interface before enabling the DHCP server.";
}
}
if (!$input_errors) {
$config['dhcpd'][$if]['range']['from'] = $_POST['range_from'];
$config['dhcpd'][$if]['range']['to'] = $_POST['range_to'];
$config['dhcpd'][$if]['defaultleasetime'] = $_POST['deftime'];
$config['dhcpd'][$if]['maxleasetime'] = $_POST['maxtime'];
$config['dhcpd'][$if]['netmask'] = $_POST['netmask'];
$previous = $config['dhcpd'][$if]['failover_peerip'];
if($previous <> $_POST['failover_peerip']) {
mwexec("rm -rf /var/dhcpd/var/db/*");
}
$config['dhcpd'][$if]['failover_peerip'] = $_POST['failover_peerip'];
unset($config['dhcpd'][$if]['winsserver']);
if ($_POST['wins1'])
$config['dhcpd'][$if]['winsserver'][] = $_POST['wins1'];
if ($_POST['wins2'])
$config['dhcpd'][$if]['winsserver'][] = $_POST['wins2'];
unset($config['dhcpd'][$if]['dnsserver']);
if ($_POST['dns1'])
$config['dhcpd'][$if]['dnsserver'][] = $_POST['dns1'];
if ($_POST['dns2'])
$config['dhcpd'][$if]['dnsserver'][] = $_POST['dns2'];
$config['dhcpd'][$if]['gateway'] = $_POST['gateway'];
$config['dhcpd'][$if]['denyunknown'] = ($_POST['denyunknown']) ? true : false;
$config['dhcpd'][$if]['enable'] = ($_POST['enable']) ? true : false;
$config['dhcpd'][$if]['staticarp'] = ($_POST['staticarp']) ? true : false;
$config['dhcpd'][$if]['ddnsdomain'] = $_POST['ddnsdomain'];
$config['dhcpd'][$if]['ddnsupdate'] = ($_POST['ddnsupdate']) ? true : false;
unset($config['dhcpd'][$if]['ntpserver']);
if ($_POST['ntp1'])
$config['dhcpd'][$if]['ntpserver'][] = $_POST['ntp1'];
if ($_POST['ntp2'])
$config['dhcpd'][$if]['ntpserver'][] = $_POST['ntp2'];
$config['dhcpd'][$if]['netboot'] = ($_POST['netboot']) ? true : false;
$config['dhcpd'][$if]['next-server'] = $_POST['nextserver'];
$config['dhcpd'][$if]['filename'] = $_POST['filename'];
write_config();
/* static arp configuration */
interfaces_staticarp_configure($if);
$retval = 0;
$retvaldhcp = 0;
$retvaldns = 0;
config_lock();
/* Stop DHCP so we can cleanup leases */
killbyname("dhcpd");
dhcp_clean_leases();
/* dnsmasq_configure calls dhcpd_configure */
/* no need to restart dhcpd twice */
if (isset($config['dnsmasq']['regdhcpstatic'])) {
$retvaldns = services_dnsmasq_configure();
if ($retvaldns == 0) {
if (file_exists($d_hostsdirty_path))
unlink($d_hostsdirty_path);
if (file_exists($d_staticmapsdirty_path))
unlink($d_staticmapsdirty_path);
}
} else {
$retvaldhcp = services_dhcpd_configure();
if ($retvaldhcp == 0) {
if (file_exists($d_staticmapsdirty_path))
unlink($d_staticmapsdirty_path);
}
}
config_unlock();
if($retvaldhcp == 1 || $retvaldns == 1)
$retval = 1;
$savemsg = get_std_save_message($retval);
}
}
if ($_GET['act'] == "del") {
if ($a_maps[$_GET['id']]) {
unset($a_maps[$_GET['id']]);
write_config();
if(isset($config['dhcpd'][$if]['enable'])) {
touch($d_staticmapsdirty_path);
if (isset($config['dnsmasq']['regdhcpstatic']))
touch($d_hostsdirty_path);
}
header("Location: services_dhcp.php?if={$if}");
exit;
}
}
$pgtitle = "Services: DHCP server";
include("head.inc");
?>