1 files changed, 57 insertions, 0 deletions
diff --git a/src/lib/asiolink/io_socket.cc b/src/lib/asiolink/io_socket.cc
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+++ b/src/lib/asiolink/io_socket.cc
@@ -0,0 +1,57 @@
+// 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 <asiolink/asio_wrapper.h>
+#include <asiolink/io_socket.h>
+
+namespace isc {
+namespace asiolink {
+
+/// \brief The \c DummySocket class is a concrete derived class of
+/// \c IOSocket that is not associated with any real socket.
+///
+/// This main purpose of this class is tests, where it may be desirable to
+/// instantiate an \c IOSocket object without involving system resource
+/// allocation such as real network sockets.
+class DummySocket : public IOSocket {
+private:
+    DummySocket(const DummySocket& source);
+    DummySocket& operator=(const DummySocket& source);
+public:
+    /// \brief Constructor from the protocol number.
+    ///
+    /// The protocol must validly identify a standard network protocol.
+    /// For example, to specify TCP \c protocol must be \c IPPROTO_TCP.
+    ///
+    /// \param protocol The network protocol number for the socket.
+    DummySocket(const int protocol) : protocol_(protocol) {}
+
+    /// \brief A dummy derived method of \c IOSocket::getNative().
+    ///
+    /// This version of method always returns -1 as the object is not
+    /// associated with a real (native) socket.
+    virtual int getNative() const { return (-1); }
+
+    virtual int getProtocol() const { return (protocol_); }
+private:
+    const int protocol_;
+};
+
+IOSocket&
+IOSocket::getDummyUDPSocket() {
+    static DummySocket socket(IPPROTO_UDP);
+    return (socket);
+}
+
+IOSocket&
+IOSocket::getDummyTCPSocket() {
+    static DummySocket socket(IPPROTO_TCP);
+    return (socket);
+}
+
+} // namespace asiolink
+} // namespace isc