Add parsing for mdns QU records (RFC6762)

1 files changed, 15 insertions, 1 deletions

diff --git a/src/main/java/de/measite/minidns/Record.java b/src/main/java/de/measite/minidns/Record.java
index 6aaf4f7d..26af4711 100644
--- a/src/main/java/de/measite/minidns/Record.java
+++ b/src/main/java/de/measite/minidns/Record.java
@@ -223,6 +223,11 @@ public class Record {
     protected Data payloadData;
 
     /**
+     * MDNS defines the highest bit of the class as the unicast query bit.
+     */
+    protected boolean unicastQuery;
+
+    /**
      * Parse a given record based on the full message data and the current
      * stream position.
      * @param dis The DataInputStream positioned at the first record byte.
@@ -233,7 +238,8 @@ public class Record {
         this.name = NameUtil.parse(dis, data);
         this.type = TYPE.getType(dis.readUnsignedShort());
         int clazzValue = dis.readUnsignedShort();
-        this.clazz = CLASS.getClass(clazzValue);
+        this.clazz = CLASS.getClass(clazzValue & 0x7fff);
+        this.unicastQuery = (clazzValue & 0x8000) > 0;
         if (this.clazz == null) {
             System.out.println("Unknown class " + clazzValue);
         }
@@ -299,6 +305,14 @@ public class Record {
     }
 
     /**
+     * See if this query/response was a unicast query (highest class bit set).
+     * @return True if it is a unicast query/response record.
+     */
+    public boolean isUnicastQuery() {
+        return unicastQuery;
+    }
+
+    /**
      * The generic record name, e.g. "measite.de".
      * @return The record name.
      */