nfs4: Add stub RPC reply code

RPC::Reply interprets incoming RPC replies. Currently only XID is
read.

src/add-ons/kernel/file_systems/nfs4/Jamfile

@@ -7,5 +7,6 @@ KernelAddon nfs4 :
 	kernel_interface.cpp
 	RPCAuth.cpp
 	RPCCall.cpp
+	RPCReply.cpp
 	XDR.cpp
 ;

src/add-ons/kernel/file_systems/nfs4/RPCReply.cpp

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2012 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Paweł Dziepak, pdziepak@quarnos.org
+ */
+
+
+#include "RPCReply.h"
+
+#include <util/kernel_cpp.h>
+
+
+using namespace RPC;
+
+
+Reply::Reply(void *buffer, int size)
+	:
+	fError(B_OK),
+	fStream(buffer, size),
+	fBuffer(buffer)
+{
+	fXID = fStream.GetUInt();
+#if 0
+	int32 type = fStream.GetInt();
+	int32 state = fStream.GetInt();
+	int32 auth = fStream.GetInt();
+	fStream.GetOpaque(NULL);
+#endif
+}
+
+
+Reply::~Reply()
+{
+	free(fBuffer);
+}
+

src/add-ons/kernel/file_systems/nfs4/RPCReply.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2012 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Paweł Dziepak, pdziepak@quarnos.org
+ */
+#ifndef RPCREPLY_H
+#define RPCREPLY_H
+
+
+#include "XDR.h"
+
+
+namespace RPC {
+
+class Reply {
+public:
+								Reply(void *buffer, int size);
+								~Reply();
+
+	inline	uint32				GetXID();
+
+	inline	status_t			GetError();
+	inline	XDR::ReadStream&	GetStream();
+
+private:
+			uint32				fXID;
+
+			status_t			fError;
+
+			XDR::ReadStream		fStream;
+			void*				fBuffer;
+};
+
+inline uint32
+Reply::GetXID()
+{
+	return fXID;
+}
+
+
+inline status_t
+Reply::GetError()
+{
+	return fError;
+}
+
+
+inline XDR::ReadStream&
+Reply::GetStream()
+{
+	return fStream;
+}
+
+}		// namespace RPC
+
+
+#endif	// RPCREPLY_H
+