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<?php
$leases_file = "/var/dhcpd/var/db/dhcpd6.leases";
if(!file_exists($leases_file)) {
exit(1);
}
$duid_arr = array();
foreach(file($leases_file) as $line) {
// echo "$line";
if(preg_match("/^(ia-[np][ad])[ ]+\"(.*?)\"/i ", $line, $duidmatch)) {
$type = $duidmatch[1];
$duid = $duidmatch[2];
continue;
}
/* is it active? otherwise just discard */
if(preg_match("/binding state active/i", $line, $activematch)) {
$active = true;
continue;
}
if(preg_match("/iaaddr[ ]+([0-9a-f:]+)[ ]+/i", $line, $addressmatch)) {
$ia_na = $addressmatch[1];
continue;
}
if(preg_match("/iaprefix[ ]+([0-9a-f:\/]+)[ ]+/i", $line, $prefixmatch)) {
$ia_pd = $prefixmatch[1];
continue;
}
/* closing bracket */
if(preg_match("/^}/i ", $line)) {
switch($type) {
case "ia-na":
$duid_arr[$duid][$type] = $ia_na;
break;
case "ia-pd":
$duid_arr[$duid][$type] = $ia_pd;
break;
}
unset($type);
unset($duid);
unset($active);
unset($ia_na);
unset($ia_pd);
continue;
}
}
$routes = array();
foreach ($duid_arr as $entry) {
if($entry['ia-pd'] <> "") {
$routes[$entry['ia-na']] = $entry['ia-pd'];
}
array_shift($duid_arr);
}
// echo "add routes\n";
if(count($routes) > 0) {
foreach ($routes as $address => $prefix) {
echo "/sbin/route change -inet6 {$prefix} {$address}\n";
}
}
/* get clog from dhcpd */
$dhcpdlogfile = "/var/log/dhcpd.log";
$clog = array();
if(file_exists(dhcpdlogfile))
exec("clog $dhcpdlogfile", $clog, $ret);
if($ret > 0)
$clog = array();
$expires = array();
foreach($clog as $line) {
if(preg_match("/releases[ ]+prefix[ ]+([0-9a-f:]+\/[0-9]+)/i", $line, $expire)) {
if(in_array($expire[1], $routes))
continue;
$expires[$expire[1]] = $expire[1];
}
array_shift($clog);
}
// echo "remove routes\n";
if(count($expires) > 0) {
foreach ($expires as $prefix) {
echo "/sbin/route delete -inet6 {$prefix['prefix']}\n";
array_shift($expires);
}
}
?>
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