-class NetworkModel;
-typedef NetworkModel *NetworkModelPtr;
-
-class NetworkLink;
-typedef NetworkLink *NetworkLinkPtr;
-
-class NetworkAction;
-typedef NetworkAction *NetworkActionPtr;
-
-/*************
- * Callbacks *
- *************/
-
-/** @ingroup SURF_callbacks
- * @brief Callbacks handler which emit the callbacks after NetworkLink creation
- * @details Callback functions have the following signature: `void(NetworkLinkPtr)`
- */
-extern surf_callback(void, NetworkLinkPtr) networkLinkCreatedCallbacks;
-
-/** @ingroup SURF_callbacks
- * @brief Callbacks handler which emit the callbacks after NetworkLink destruction
- * @details Callback functions have the following signature: `void(NetworkLinkPtr)`
- */
-extern surf_callback(void, NetworkLinkPtr) networkLinkDestructedCallbacks;
-
-/** @ingroup SURF_callbacks
- * @brief Callbacks handler which emit the callbacks after NetworkLink State changed
- * @details Callback functions have the following signature: `void(NetworkLinkActionPtr action, e_surf_resource_state_t old, e_surf_resource_state_t current)`
- */
-extern surf_callback(void, NetworkLinkPtr, e_surf_resource_state_t, e_surf_resource_state_t) networkLinkStateChangedCallbacks;
-
-/** @ingroup SURF_callbacks
- * @brief Callbacks handler which emit the callbacks after NetworkAction State changed
- * @details Callback functions have the following signature: `void(NetworkActionPtr action, e_surf_action_state_t old, e_surf_action_state_t current)`
- */
-extern surf_callback(void, NetworkActionPtr, e_surf_action_state_t, e_surf_action_state_t) networkActionStateChangedCallbacks;
-
-/** @ingroup SURF_callbacks
- * @brief Callbacks handler which emit the callbacks after communication created
- * @details Callback functions have the following signature: `void(NetworkActionPtr action, RoutingEdgePtr src, RoutingEdgePtr dst, double size, double rate)`
- */
-extern surf_callback(void, NetworkActionPtr, RoutingEdgePtr src, RoutingEdgePtr dst, double size, double rate) networkCommunicateCallbacks;
-
-/*********
- * Tools *
- *********/
-
-void net_define_callbacks(void);