X-Git-Url: https://git.cweiske.de/auerswald-callnotifier.git/blobdiff_plain/ed39da2ea138da1b4a8eac805bcde19dedd8c054..HEAD:/src/callnotifier/EDSS1/Parser.php

diff --git a/src/callnotifier/EDSS1/Parser.php b/src/callnotifier/EDSS1/Parser.php
index f3ebeba..b5a906d 100644
--- a/src/callnotifier/EDSS1/Parser.php
+++ b/src/callnotifier/EDSS1/Parser.php
@@ -19,16 +19,17 @@ class EDSS1_Parser
         if ($crLen == 0xFF) {
             return $m;
         }
-        $m->callRefType = ord($cCallRef{0}) >> 7;
-        $nCallRef = ord($cCallRef{0}) & 127;
-        if ($crLen > 1) {
-            $nCallRef = ord($cCallRef{1}) + ($nCallRef << 8);
-            if ($crLen > 2) {
-                $nCallRef = ord($cCallRef{2}) + ($nCallRef << 8);
+        if ($crLen > 0) {
+            $m->callRefType = ord($cCallRef{0}) >> 7;
+            $nCallRef = ord($cCallRef{0}) & 127;
+            if ($crLen > 1) {
+                $nCallRef = ord($cCallRef{1}) + ($nCallRef << 8);
+                if ($crLen > 2) {
+                    $nCallRef = ord($cCallRef{2}) + ($nCallRef << 8);
+                }
             }
+            $m->callRef = $nCallRef;
         }
-        $m->callRef = $nCallRef;
-        //var_dump($curpos, dechex($m->callRef));
         $m->type = ord($bytes{++$curpos});
 
         $complete = false;