--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlib/conv_layers/FileConvergenceLayer.h	Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,103 @@
+/*
+ *    Copyright 2004-2006 Intel Corporation
+ * 
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+#ifndef _FILE_CONVERGENCE_LAYER_H_
+#define _FILE_CONVERGENCE_LAYER_H_
+
+#include "ConvergenceLayer.h"
+#include <oasys/thread/Thread.h>
+
+namespace dtn {
+
+class FileConvergenceLayer : public ConvergenceLayer {
+public:
+    /**
+     * Constructor.
+     */
+    FileConvergenceLayer();
+
+    /// @{
+    
+    virtual bool interface_up(Interface* iface,
+                              int argc, const char* argv[]);
+    virtual bool interface_down(Interface* iface);
+    virtual bool open_contact(const ContactRef& contact);
+    virtual bool close_contact(const ContactRef& contact);
+    virtual void send_bundle(const ContactRef& contact, Bundle* bundle);
+
+protected:
+    /**
+     * Current version of the file cl protocol.
+     */
+    static const int CURRENT_VERSION = 0x1;
+     
+    /**
+     * Framing header at the beginning of each bundle file.
+     */
+    struct FileHeader {
+        u_int8_t version;		///< framing protocol version
+        u_int8_t pad;			///< unused
+        u_int16_t header_length;	///< length of the bundle header
+        u_int32_t bundle_length;	///< length of the bundle + headers
+    } __attribute__((packed));
+    
+    /**
+     * Pull a filesystem directory out of the next hop admin address.
+     */
+    bool extract_dir(const char* nexthop, std::string* dirp);
+    
+    /**
+     * Validate that a given directory exists and that the permissions
+     * are correct.
+     */
+    bool validate_dir(const std::string& dir);
+        
+    /**
+     * Helper class (and thread) that periodically scans a directory
+     * for new bundle files.
+     */
+    class Scanner : public CLInfo, public oasys::Logger, public oasys::Thread {
+    public:
+        /**
+         * Constructor.
+         */
+        Scanner(int secs_per_scan, const std::string& dir);
+
+        /**
+         * Set the flag to ask it to stop next loop.
+         */
+        void stop();
+
+        /**
+         * Virtual from SerializableObject
+         */
+        virtual void serialize( oasys::SerializableObject *) {}
+
+    protected:
+        /**
+         * Main thread function.
+         */
+        void run();
+        
+        int secs_per_scan_;	///< scan interval
+        std::string dir_;	///< directory to scan for bundles.
+        bool run_;              ///< keep running?
+    };
+};
+
+} // namespace dtn
+
+#endif /* _FILE_CONVERGENCE_LAYER_H_ */