+/*************
+ * Callbacks *
+ *************/
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emits the callbacks after NetworkLink creation
+ * @details Callback functions have the following signature: `void(NetworkLinkPtr)`
+ */
+XBT_PUBLIC_DATA( surf_callback(void, NetworkLinkPtr)) networkLinkCreatedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emits the callbacks after NetworkLink destruction
+ * @details Callback functions have the following signature: `void(NetworkLinkPtr)`
+ */
+XBT_PUBLIC_DATA( surf_callback(void, NetworkLinkPtr)) networkLinkDestructedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emits 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)`
+ */
+XBT_PUBLIC_DATA( surf_callback(void, NetworkLinkPtr, e_surf_resource_state_t, e_surf_resource_state_t)) networkLinkStateChangedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emits 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)`
+ */
+XBT_PUBLIC_DATA( surf_callback(void, NetworkActionPtr, e_surf_action_state_t, e_surf_action_state_t)) networkActionStateChangedCallbacks;
+
+/** @ingroup SURF_callbacks
+ * @brief Callbacks handler which emits the callbacks after communication created
+ * @details Callback functions have the following signature: `void(NetworkActionPtr action, RoutingEdgePtr src, RoutingEdgePtr dst, double size, double rate)`
+ */
+XBT_PUBLIC_DATA( surf_callback(void, NetworkActionPtr, RoutingEdgePtr src, RoutingEdgePtr dst, double size, double rate)) networkCommunicateCallbacks;