1 files changed, 62 insertions, 0 deletions
diff --git a/src/lib/dns/opcode.cc b/src/lib/dns/opcode.cc
new file mode 100644
index 0000000..c6e051a
--- /dev/null
+++ b/src/lib/dns/opcode.cc
@@ -0,0 +1,62 @@
+// Copyright (C) 2010-2016 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <string>
+#include <ostream>
+
+#include <exceptions/exceptions.h>
+
+#include <dns/opcode.h>
+
+using namespace std;
+
+namespace isc {
+namespace dns {
+namespace {
+const char *opcodetext[] = {
+    "QUERY",
+    "IQUERY",
+    "STATUS",
+    "RESERVED3",
+    "NOTIFY",
+    "UPDATE",
+    "RESERVED6",
+    "RESERVED7",
+    "RESERVED8",
+    "RESERVED9",
+    "RESERVED10",
+    "RESERVED11",
+    "RESERVED12",
+    "RESERVED13",
+    "RESERVED14",
+    "RESERVED15"
+};
+
+// OPCODEs are 4-bit values.  So 15 is the highest code.
+const uint8_t MAX_OPCODE = 15;
+}
+
+Opcode::Opcode(const uint8_t code) : code_(static_cast<CodeValue>(code)) {
+    if (code > MAX_OPCODE) {
+        isc_throw(OutOfRange,
+                  "DNS Opcode is too large to construct: "
+                  << static_cast<unsigned>(code));
+    }
+}
+
+string
+Opcode::toText() const {
+    return (opcodetext[code_]);
+}
+
+ostream&
+operator<<(std::ostream& os, const Opcode& opcode) {
+    return (os << opcode.toText());
+}
+}
+}