1 files changed, 93 insertions, 0 deletions
diff --git a/src/usr/local/sbin/prefixes.php b/src/usr/local/sbin/prefixes.php
new file mode 100644
index 0000000..118bd9e
--- /dev/null
+++ b/src/usr/local/sbin/prefixes.php
@@ -0,0 +1,93 @@
+<?php
+
+$leases_file = "/var/dhcpd/var/db/dhcpd6.leases";
+if (!file_exists($leases_file)) {
+	exit(1);
+}
+
+$fd = fopen($leases_file, 'r');
+
+$duid_arr = array();
+while (( $line = fgets($fd, 4096)) !== false) {
+	// 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;
+	}
+}
+fclose($fd);
+
+$routes = array();
+foreach ($duid_arr as $entry) {
+	if (!empty($entry['ia-pd'])) {
+		$routes[$entry['ia-na']] = $entry['ia-pd'];
+	}
+}
+
+// echo "add routes\n";
+if (count($routes) > 0) {
+	foreach ($routes as $address => $prefix) {
+		echo "/sbin/route change -inet6 {$prefix} {$address}\n";
+	}
+}
+
+/* get clog from dhcpd */
+$dhcpdlogfile = "/var/log/dhcpd.log";
+$expires = array();
+if (file_exists($dhcpdlogfile)) {
+	$fd = popen("clog $dhcpdlogfile", 'r');
+	while (($line = fgets($fd)) !== false) {
+		//echo $line;
+		if (preg_match("/releases[ ]+prefix[ ]+([0-9a-f:]+\/[0-9]+)/i", $line, $expire)) {
+			if (in_array($expire[1], $routes)) {
+				continue;
+			}
+			$expires[$expire[1]] = $expire[1];
+		}
+	}
+	pclose($fd);
+}
+
+// echo "remove routes\n";
+if (count($expires) > 0) {
+	foreach ($expires as $prefix) {
+		echo "/sbin/route delete -inet6 {$prefix['prefix']}\n";
+	}
+}
+
+?>