Fragmenter.h

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/*******************************************************************************
 *
 * Copyright (c) 2009-2010 Philipp Werner <philipp.werner@st.ovgu.de>
 *                         Michael Schulze <mschulze@ivs.cs.uni-magdeburg.de>
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#ifndef __FRAGMENTER_H_248EC79C4F9347__
#define __FRAGMENTER_H_248EC79C4F9347__


#include "debug.h"

#include "assert/staticerror.h"

#include "mw/afp/Config.h"
#include "mw/afp/FragPolicySelector.h"


namespace famouso {
    namespace mw {
        namespace afp {


            template < class AFPFC, unsigned int mtu_compile_time = 0 >
            class Fragmenter {

                    typedef FragPolicySelector<AFPFC> FCP;

                    typedef class FCP::FragImplPolicy FragmenterImpl;

                public:

                    typedef typename FCP::SizeProp::elen_t   elen_t;
                    typedef typename FCP::SizeProp::flen_t   flen_t;
                    typedef typename FCP::SizeProp::fcount_t fcount_t;

                protected:

                    FragmenterImpl frag;

                public:

                    Fragmenter(const uint8_t * event_data, elen_t event_length) {
                        // Compile time check if minimum header fits into MTU
                        FAMOUSO_STATIC_ASSERT_ERROR(mtu_compile_time > FragmenterImpl::min_header_length,
                                                    MTU_is_too_small_for_this_configuration, ());
                        frag.init(event_data, event_length, mtu_compile_time);
                    }

                    Fragmenter(const uint8_t * event_data, elen_t event_length, flen_t mtu) {
                        frag.init(event_data, event_length, mtu);
                    }

                    bool error() {
                        return frag.error();
                    }

                    flen_t get_fragment(uint8_t * fragment_data) {
                        return frag.get_fragment(fragment_data);
                    }
            };


            template < unsigned int mtu_compile_time >
            class Fragmenter<Disable, mtu_compile_time> {

                public:

                    typedef uint16_t elen_t;
                    typedef uint16_t flen_t;
                    typedef uint16_t fcount_t;

                    Fragmenter(const uint8_t * event_data, elen_t event_length) {
                        ::logging::log::emit< ::logging::Warning>()
                            << PROGMEMSTRING("Event is to big to deliver at once and fragmentation is disabled.")
                            << ::logging::log::endl;
                    }

                    Fragmenter(const uint8_t * event_data, elen_t event_length, flen_t mtu) {
                        ::logging::log::emit< ::logging::Warning>()
                            << PROGMEMSTRING("Event is to big to deliver at once and fragmentation is disabled.")
                            << ::logging::log::endl;
                    }

                    bool error() {
                        return true;
                    }

                    flen_t get_fragment(uint8_t * fragment_data) {
                        return 0;
                    }
            };

        } // namespace afp
    } // namespace mw
} // namespace famouso



#endif // __FRAGMENTER_H_248EC79C4F9347__