diff --git a/ndnboost/test/utils/callback.hpp b/ndnboost/test/utils/callback.hpp
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+++ b/ndnboost/test/utils/callback.hpp
@@ -0,0 +1,310 @@
+//  (C) Copyright Gennadiy Rozental 2005-2008.
+//  Use, modification, and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/test for the library home page.
+//
+//  File        : $RCSfile$
+//
+//  Version     : $Revision: 49312 $
+//
+//  Description : 
+// ***************************************************************************
+
+#ifndef BOOST_TEST_CALLBACK_020505GER
+#define BOOST_TEST_CALLBACK_020505GER
+
+// Boost
+#include <ndnboost/config.hpp>
+#include <ndnboost/detail/workaround.hpp>
+#include <ndnboost/shared_ptr.hpp>
+
+#include <ndnboost/test/detail/suppress_warnings.hpp>
+
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) || BOOST_WORKAROUND(BOOST_INTEL, <= 700)
+#  define BOOST_CALLBACK_EXPLICIT_COPY_CONSTRUCTOR
+#endif
+
+//____________________________________________________________________________//
+
+namespace ndnboost {
+
+namespace unit_test {
+
+namespace ut_detail {
+
+struct unused {};
+
+template<typename R>
+struct invoker {
+    template<typename Functor>
+    R       invoke( Functor& f )                        { return f(); }
+    template<typename Functor, typename T1>
+    R       invoke( Functor& f, T1 t1 )                 { return f( t1 ); }
+    template<typename Functor, typename T1, typename T2>
+    R       invoke( Functor& f, T1 t1, T2 t2 )          { return f( t1, t2 ); }
+    template<typename Functor, typename T1, typename T2, typename T3>
+    R       invoke( Functor& f, T1 t1, T2 t2, T3 t3 )   { return f( t1, t2, t3 ); }
+};
+
+//____________________________________________________________________________//
+
+template<>
+struct invoker<unused> {
+    template<typename Functor>
+    unused  invoke( Functor& f )                        { f(); return unused(); }
+    template<typename Functor, typename T1>
+    unused  invoke( Functor& f, T1 t1 )                 { f( t1 ); return unused(); }
+    template<typename Functor, typename T1, typename T2>
+    unused  invoke( Functor& f, T1 t1, T2 t2 )          { f( t1, t2 ); return unused(); }
+    template<typename Functor, typename T1, typename T2, typename T3>
+    unused  invoke( Functor& f, T1 t1, T2 t2, T3 t3 )   { f( t1, t2, t3 ); return unused(); }
+};
+
+//____________________________________________________________________________//
+
+} // namespace ut_detail
+
+// ************************************************************************** //
+// **************             unit_test::callback0             ************** //
+// ************************************************************************** //
+
+namespace ut_detail {
+
+template<typename R>
+struct callback0_impl {
+    virtual ~callback0_impl() {}
+
+    virtual R invoke() = 0;
+};
+
+//____________________________________________________________________________//
+
+template<typename R, typename Functor>
+struct callback0_impl_t : callback0_impl<R> {
+    // Constructor
+    explicit callback0_impl_t( Functor f ) : m_f( f ) {}
+
+    virtual R invoke() { return invoker<R>().invoke( m_f ); }
+
+private:
+    // Data members
+    Functor m_f;
+};
+
+//____________________________________________________________________________//
+
+} // namespace ut_detail
+
+template<typename R = ut_detail::unused>
+class callback0 {
+public:
+    // Constructors
+    callback0() {}
+#ifdef BOOST_CALLBACK_EXPLICIT_COPY_CONSTRUCTOR
+    callback0( callback0 const& rhs ) : m_impl( rhs.m_impl ) {}
+#endif
+
+    template<typename Functor>
+    callback0( Functor f )
+    : m_impl( new ut_detail::callback0_impl_t<R,Functor>( f ) ) {}
+    
+    void        operator=( callback0 const& rhs ) { m_impl = rhs.m_impl; }
+
+    template<typename Functor>
+    void        operator=( Functor f ) { m_impl.reset( new ut_detail::callback0_impl_t<R,Functor>( f ) );  }
+
+    R           operator()() const { return m_impl->invoke(); }
+
+    bool        operator!() const { return !m_impl; }
+
+private:
+    // Data members
+    ndnboost::shared_ptr<ut_detail::callback0_impl<R> > m_impl;
+};
+
+// ************************************************************************** //
+// **************             unit_test::callback1             ************** //
+// ************************************************************************** //
+
+namespace ut_detail {
+
+template<typename R, typename T1>
+struct callback1_impl {
+    virtual ~callback1_impl() {}
+
+    virtual R invoke( T1 t1 ) = 0;
+};
+
+//____________________________________________________________________________//
+
+template<typename R, typename T1,typename Functor>
+struct callback1_impl_t : callback1_impl<R,T1> {
+    // Constructor
+    explicit callback1_impl_t( Functor f ) : m_f( f ) {}
+
+    virtual R invoke( T1 t1 ) { return invoker<R>().invoke( m_f, t1 ); }
+
+private:
+    // Data members
+    Functor m_f;
+};
+
+//____________________________________________________________________________//
+
+} // namespace ut_detail
+
+template<typename T1,typename R = ut_detail::unused>
+class callback1 {
+public:
+    // Constructors
+    callback1() {}
+#ifdef BOOST_CALLBACK_EXPLICIT_COPY_CONSTRUCTOR
+    callback1( callback1 const& rhs ) : m_impl( rhs.m_impl ) {}
+#endif
+
+    template<typename Functor>
+    callback1( Functor f )
+    : m_impl( new ut_detail::callback1_impl_t<R,T1,Functor>( f ) ) {}
+
+    void        operator=( callback1 const& rhs ) { m_impl = rhs.m_impl; }
+
+    template<typename Functor>
+    void        operator=( Functor f ) { m_impl.reset( new ut_detail::callback1_impl_t<R,T1,Functor>( f ) );  }
+
+    R           operator()( T1 t1 ) const { return m_impl->invoke( t1 ); }
+
+    bool        operator!() const { return !m_impl; }
+
+private:
+    // Data members
+    ndnboost::shared_ptr<ut_detail::callback1_impl<R,T1> > m_impl;
+};
+
+// ************************************************************************** //
+// **************             unit_test::callback2             ************** //
+// ************************************************************************** //
+
+namespace ut_detail {
+
+template<typename R, typename T1,typename T2>
+struct callback2_impl {
+    virtual ~callback2_impl() {}
+
+    virtual R invoke( T1 t1, T2 t2 ) = 0;
+};
+
+//____________________________________________________________________________//
+
+template<typename R, typename T1, typename T2, typename Functor>
+struct callback2_impl_t : callback2_impl<R,T1,T2> {
+    // Constructor
+    explicit callback2_impl_t( Functor f ) : m_f( f ) {}
+
+    virtual R invoke( T1 t1, T2 t2 ) { return invoker<R>().template invoke<Functor,T1,T2>( m_f, t1, t2 ); }
+
+private:
+    // Data members
+    Functor m_f;
+};
+
+//____________________________________________________________________________//
+
+} // namespace ut_detail
+
+template<typename T1,typename T2, typename R = ut_detail::unused>
+class callback2 {
+public:
+    // Constructors
+    callback2() {}
+#ifdef BOOST_CALLBACK_EXPLICIT_COPY_CONSTRUCTOR
+    callback2( callback2 const& rhs ) : m_impl( rhs.m_impl ) {}
+#endif
+
+    template<typename Functor>
+                callback2( Functor f ) : m_impl( new ut_detail::callback2_impl_t<R,T1,T2,Functor>( f ) ) {}
+
+    void        operator=( callback2 const& rhs ) { m_impl = rhs.m_impl; }
+
+    template<typename Functor>
+    void        operator=( Functor f ) { m_impl.reset( new ut_detail::callback2_impl_t<R,T1,T2,Functor>( f ) );  }
+
+    R           operator()( T1 t1, T2 t2 ) const { return m_impl->invoke( t1, t2 ); }
+
+    bool        operator!() const { return !m_impl; }
+
+private:
+    // Data members
+    ndnboost::shared_ptr<ut_detail::callback2_impl<R,T1,T2> > m_impl;
+};
+
+// ************************************************************************** //
+// **************             unit_test::callback3             ************** //
+// ************************************************************************** //
+
+namespace ut_detail {
+
+template<typename R, typename T1, typename T2, typename T3>
+struct callback3_impl {
+    virtual ~callback3_impl() {}
+
+    virtual R invoke( T1 t1, T2 t2, T3 t3 ) = 0;
+};
+
+//____________________________________________________________________________//
+
+template<typename R, typename T1, typename T2, typename T3, typename Functor>
+struct callback3_impl_t : callback3_impl<R,T1,T2,T3> {
+    // Constructor
+    explicit callback3_impl_t( Functor f ) : m_f( f ) {}
+
+    virtual R invoke( T1 t1, T2 t2, T3 t3 ) { return invoker<R>().invoke( m_f, t1, t2, t3 ); }
+
+private:
+    // Data members
+    Functor m_f;
+};
+
+//____________________________________________________________________________//
+
+} // namespace ut_detail
+
+template<typename T1,typename T2, typename T3, typename R = ut_detail::unused>
+class callback3 {
+public:
+    // Constructors
+    callback3() {}
+#ifdef BOOST_CALLBACK_EXPLICIT_COPY_CONSTRUCTOR
+    callback3( callback3 const& rhs ) : m_impl( rhs.m_impl ) {}
+#endif
+
+    template<typename Functor>
+    callback3( Functor f )
+    : m_impl( new ut_detail::callback3_impl_t<R,T1,T2,T3,Functor>( f ) ) {}
+
+    void        operator=( callback3 const& rhs ) { m_impl = rhs.m_impl; }
+
+    template<typename Functor>
+    void        operator=( Functor f ) { m_impl.reset( new ut_detail::callback3_impl_t<R,T1,T2,T3,Functor>( f ) );  }
+
+    R           operator()( T1 t1, T2 t2, T3 t3 ) const { return m_impl->invoke( t1, t2, t3 ); }
+
+    bool        operator!() const { return !m_impl; }
+
+private:
+    // Data members
+    ndnboost::shared_ptr<ut_detail::callback3_impl<R,T1,T2,T3> > m_impl;
+};
+
+} // namespace unit_test
+
+} // namespace ndnboost
+
+#undef BOOST_CALLBACK_EXPLICIT_COPY_CONSTRUCTOR
+
+//____________________________________________________________________________//
+
+#include <ndnboost/test/detail/enable_warnings.hpp>
+
+#endif // BOOST_TEST_CALLBACK_020505GER