FileConvergenceLayer.h

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00001 /*
00002  *    Copyright 2004-2006 Intel Corporation
00003  * 
00004  *    Licensed under the Apache License, Version 2.0 (the "License");
00005  *    you may not use this file except in compliance with the License.
00006  *    You may obtain a copy of the License at
00007  * 
00008  *        http://www.apache.org/licenses/LICENSE-2.0
00009  * 
00010  *    Unless required by applicable law or agreed to in writing, software
00011  *    distributed under the License is distributed on an "AS IS" BASIS,
00012  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  *    See the License for the specific language governing permissions and
00014  *    limitations under the License.
00015  */
00016 
00017 #ifndef _FILE_CONVERGENCE_LAYER_H_
00018 #define _FILE_CONVERGENCE_LAYER_H_
00019 
00020 #include "ConvergenceLayer.h"
00021 #include <oasys/thread/Thread.h>
00022 
00023 namespace dtn {
00024 
00025 class FileConvergenceLayer : public ConvergenceLayer {
00026 public:
00030     FileConvergenceLayer();
00031 
00033     
00034     virtual bool interface_up(Interface* iface,
00035                               int argc, const char* argv[]);
00036     virtual bool interface_down(Interface* iface);
00037     virtual bool open_contact(const ContactRef& contact);
00038     virtual bool close_contact(const ContactRef& contact);
00039     virtual void send_bundle(const ContactRef& contact, Bundle* bundle);
00040 
00041 protected:
00045     static const int CURRENT_VERSION = 0x1;
00046      
00050     struct FileHeader {
00051         u_int8_t version;               
00052         u_int8_t pad;                   
00053         u_int16_t header_length;        
00054         u_int32_t bundle_length;        
00055     } __attribute__((packed));
00056     
00060     bool extract_dir(const char* nexthop, std::string* dirp);
00061     
00066     bool validate_dir(const std::string& dir);
00067         
00072     class Scanner : public CLInfo, public oasys::Logger, public oasys::Thread {
00073     public:
00077         Scanner(int secs_per_scan, const std::string& dir);
00078 
00082         void stop();
00083 
00087         virtual void serialize( oasys::SerializableObject *) {}
00088 
00089     protected:
00093         void run();
00094         
00095         int secs_per_scan_;     
00096         std::string dir_;       
00097         bool run_;              
00098     };
00099 };
00100 
00101 } // namespace dtn
00102 
00103 #endif /* _FILE_CONVERGENCE_LAYER_H_ */

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