--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/apps/dtntunnel/UDPTunnel.h	Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,80 @@
+/*
+ *    Copyright 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 _UDPTUNNEL_H_
+#define _UDPTUNNEL_H_
+
+#include <dtn_api.h>
+
+#include <oasys/debug/Log.h>
+#include <oasys/io/UDPClient.h>
+#include <oasys/thread/MsgQueue.h>
+#include <oasys/thread/Thread.h>
+#include <oasys/util/ExpandableBuffer.h>
+
+#include "IPTunnel.h"
+
+namespace dtntunnel {
+
+class DTNTunnel;
+
+class UDPTunnel : public IPTunnel {
+public:
+    /// Constructor
+    UDPTunnel();
+
+    /// Add a new listener
+    void add_listener(in_addr_t listen_addr, u_int16_t listen_port,
+                      in_addr_t remote_addr, u_int16_t remote_port);
+    
+    /// Handle a newly arriving bundle
+    void handle_bundle(dtn::APIBundle* bundle);
+
+protected:
+    /// Sender socket
+    oasys::UDPClient sock_;
+    
+    /// Helper class to handle a proxied UDP port
+    class Listener : public oasys::Thread, public oasys::Logger {
+    public:
+        /// Constructor
+        Listener(in_addr_t listen_addr, u_int16_t listen_port,
+                 in_addr_t remote_addr, u_int16_t remote_port);
+        
+    protected:
+        /// Main listen loop
+        void run();
+        
+        /// Receiver socket
+        oasys::UDPClient sock_;
+
+        /// Static receiving buffer
+        char recv_buf_[65536];
+        
+        /// @{
+        /// Proxy parameters
+        in_addr_t listen_addr_;
+        u_int16_t listen_port_;
+        in_addr_t remote_addr_;
+        u_int16_t remote_port_;
+        /// @}
+    };
+    
+};
+
+} // namespace dtntunnel
+
+#endif /* _UDPTUNNEL_H_ */