1 files changed, 86 insertions, 0 deletions
diff --git a/src/javax/jmdns/impl/constants/DNSOperationCode.java b/src/javax/jmdns/impl/constants/DNSOperationCode.java
new file mode 100644
index 0000000..86af38f
--- /dev/null
+++ b/src/javax/jmdns/impl/constants/DNSOperationCode.java
@@ -0,0 +1,86 @@
+/**
+ *
+ */
+package javax.jmdns.impl.constants;
+
+/**
+ * DNS operation code.
+ * 
+ * @author Arthur van Hoff, Jeff Sonstein, Werner Randelshofer, Pierre Frisch, Rick Blair
+ */
+public enum DNSOperationCode {
+    /**
+     * Query [RFC1035]
+     */
+    Query("Query", 0),
+    /**
+     * IQuery (Inverse Query, Obsolete) [RFC3425]
+     */
+    IQuery("Inverse Query", 1),
+    /**
+     * Status [RFC1035]
+     */
+    Status("Status", 2),
+    /**
+     * Unassigned
+     */
+    Unassigned("Unassigned", 3),
+    /**
+     * Notify [RFC1996]
+     */
+    Notify("Notify", 4),
+    /**
+     * Update [RFC2136]
+     */
+    Update("Update", 5);
+
+    /**
+     * DNS RCode types are encoded on the last 4 bits
+     */
+    static final int     OpCode_MASK = 0x7800;
+
+    private final String _externalName;
+
+    private final int    _index;
+
+    DNSOperationCode(String name, int index) {
+        _externalName = name;
+        _index = index;
+    }
+
+    /**
+     * Return the string representation of this type
+     * 
+     * @return String
+     */
+    public String externalName() {
+        return _externalName;
+    }
+
+    /**
+     * Return the numeric value of this type
+     * 
+     * @return String
+     */
+    public int indexValue() {
+        return _index;
+    }
+
+    /**
+     * @param flags
+     * @return label
+     */
+    public static DNSOperationCode operationCodeForFlags(int flags) {
+        int maskedIndex = (flags & OpCode_MASK) >> 11;
+        for (DNSOperationCode aCode : DNSOperationCode.values()) {
+            if (aCode._index == maskedIndex) return aCode;
+        }
+        return Unassigned;
+    }
+
+    @Override
+    public String toString() {
+        return this.name() + " index " + this.indexValue();
+    }
+
+}