ddns.php: add ip to each subdomain with a matching filter (v4 and v6 predefined)

1 files changed, 52 insertions, 16 deletions

diff --git a/ddns.php b/ddns.php
index 58e7c05..f4ed161 100644
--- a/ddns.php
+++ b/ddns.php
@@ -1,5 +1,9 @@
 <?php
 
+// $filter = array(v4, v6, file('/srv/http/vhosts/eckner.net/ddns/ip-filter'))
+// $x \in array($token, $token.$filter foreach $filter with match):
+// $x.ddns.eckner.net (all)
+
   function lifetime($addr) {
     $addrTeile = explode('.', $addr);
     if (($addrTeile[0] == '10') ||
@@ -33,43 +37,75 @@
 
   $ips = array_unique($ips);
 
-  unset($hasRrType);
+  $hasRrType = array();
+  $rrTypes = array();
+  $filterMatches = array();
+
+  $filters = array();
+  foreach (file('/srv/http/vhosts/eckner.net/ddns/ip-filters') as $filterLine) {
+    if (substr($filterLine, 0, 1) == '#')
+      continue;
+    $filter = explode(' ', $filterLine);
+    if (count($filter) < 2)
+      continue;
+    $filters[] = array(
+      'name' => $filter[0],
+      'regex' => substr($filter[1], 0, -1)
+    );
+  }
 
   foreach ($ips as $i => $ip) {
+    $filterMatches[$i] = array();
     if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
       $rrTypes[$i] = 'A';
       $hasRrType['A'] = 1;
+      $filterMatches[$i][] = 'v4';
     }
     elseif (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
       $rrTypes[$i] = 'AAAA';
       $hasRrType['AAAA'] = 1;
+      $filterMatches[$i][] = 'v6';
     }
     else
       die();
+    foreach ($filters as $filter) {
+      if (preg_match('@' . $filter['regex'] . '@', $ip) == 1)
+        $filterMatches[$i][] = $filter['name'];
+    }
+    $filterMatches[$i] = array_unique($filterMatches[$i]);
   }
 
-  $updateCommand = '';
+  $updateCommand = "zone ddns.eckner.net.\n";
   $logContent = '';
 
   foreach ($hasRrType as $rrType => $dummy) {
     // delete old record if existing
     $updateCommand .=
-      "zone ddns.eckner.net.\n".
-      "prereq yxrrset " . $domain . ".ddns.eckner.net IN " . $rrType . "\n".
-      "update delete " . $domain . ".ddns.eckner.net IN " . $rrType . "\n".
-      "send\n".
-      "zone ddns.eckner.net.\n";
-    // set new records no matter what
-    foreach ($ips as $i => $ip)
-      if ($rrTypes[$i] == $rrType) {
-        $updateCommand .=
-          "update add " . $domain . ".ddns.eckner.net. " . lifetime($ip) . " IN " . $rrType . " " . $ip . "\n";
-        $logContent .=
-          date('Y-m-d H:i:s') . ' ' . $domain . ' ' . $ip . "\n";
-      }
-    $updateCommand .=
+      "prereq yxrrset " . $domain . ".ddns.eckner.net IN " . $rrType . "\n" .
+      "update delete " . $domain . ".ddns.eckner.net IN " . $rrType . "\n" .
       "send\n";
+    foreach ($filters as $filter) {
+      $updateCommand .=
+        "prereq yxrrset " . $domain . "." . $filter['name'] . ".ddns.eckner.net IN " . $rrType . "\n" .
+        "update delete " . $domain . "." . $filter['name'] . ".ddns.eckner.net IN " . $rrType . "\n" .
+        "send\n";
+    }
+  }
+  // set new records no matter what
+  foreach ($ips as $i => $ip) {
+    $updateCommand .=
+      "update add " . $domain . ".ddns.eckner.net. " . lifetime($ip) . " IN " . $rrTypes[$i] . " " . $ip . "\n";
+    $logContent .=
+      date('Y-m-d H:i:s') . ' ' . $domain . ' ' . $ip . "\n";
+    foreach ($filterMatches[$i] as $filter) {
+      $updateCommand .=
+        "update add " . $domain . "." . $filter . ".ddns.eckner.net. " . lifetime($ip) . " IN " . $rrTypes[$i] . " " . $ip . "\n";
+      $logContent .=
+        date('Y-m-d H:i:s') . ' ' . $domain . '.' . $filter . ' ' . $ip . "\n";
+    }
   }
+  $updateCommand .=
+    "send\n";
 
   // actually do something
   $pin = popen('nsupdate -l', 'w');