Don't crash on domain names ending in a point

decode/dns/util.js

@@ -4,14 +4,7 @@ exports.decodeName = function(raw_packet, offset) {
   var initialOffset = offset;
   var result = { bytesDecoded:undefined, name:"" };
 
-  if(raw_packet[offset] > 63) {
-    //Name is in pointer format which is currently not supported
-    result.bytesDecoded = 2;
-    result.name = "";
-    return result;
-  }
-
-  while((segLength = raw_packet[offset++]) !== 0 && segLength < 63) {
+  while((segLength = raw_packet[offset++]) !== 0 && segLength <= 63) {
     if(firstSegment) {
       firstSegment = false;
     } else {
@@ -22,6 +15,15 @@ exports.decodeName = function(raw_packet, offset) {
       result.name += String.fromCharCode(raw_packet[offset++]);
     }
   }
+
+  if(raw_packet[offset-1] > 63) {
+    // Detected a pointer, pointers
+    // are 2 bytes long so inc the offset
+    // At this time we have very poor support
+    // for pointers
+    offset++;
+  }
+
   result.bytesDecoded = offset - initialOffset;
   return result;
 };