1 files changed, 60 insertions, 0 deletions
diff --git a/src/org/xbill/DNS/Opcode.java b/src/org/xbill/DNS/Opcode.java
new file mode 100644
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--- /dev/null
+++ b/src/org/xbill/DNS/Opcode.java
@@ -0,0 +1,60 @@
+// Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
+
+package org.xbill.DNS;
+
+/**
+ * Constants and functions relating to DNS opcodes
+ *
+ * @author Brian Wellington
+ */
+
+public final class Opcode {
+
+/** A standard query */
+public static final int QUERY		= 0;
+
+/** An inverse query (deprecated) */
+public static final int IQUERY		= 1;
+
+/** A server status request (not used) */
+public static final int STATUS		= 2;
+
+/**
+ * A message from a primary to a secondary server to initiate a zone transfer
+ */
+public static final int NOTIFY		= 4;
+
+/** A dynamic update message */
+public static final int UPDATE		= 5;
+
+private static Mnemonic opcodes = new Mnemonic("DNS Opcode",
+					       Mnemonic.CASE_UPPER);
+
+static {
+	opcodes.setMaximum(0xF);
+	opcodes.setPrefix("RESERVED");
+	opcodes.setNumericAllowed(true);
+
+	opcodes.add(QUERY, "QUERY");
+	opcodes.add(IQUERY, "IQUERY");
+	opcodes.add(STATUS, "STATUS");
+	opcodes.add(NOTIFY, "NOTIFY");
+	opcodes.add(UPDATE, "UPDATE");
+}
+
+private
+Opcode() {}
+
+/** Converts a numeric Opcode into a String */
+public static String
+string(int i) {
+	return opcodes.getText(i);
+}
+
+/** Converts a String representation of an Opcode into its numeric value */
+public static int
+value(String s) {
+	return opcodes.getValue(s);
+}
+
+}