-void TRACE_surf_link_declaration (char *name, double bw, double lat);
-void TRACE_surf_link_set_bandwidth (double date, char *resource, double bandwidth);
-void TRACE_surf_link_set_latency (double date, char *resource, double latency);
+void TRACE_surf_link_declaration (void *link, char *name, double bw, double lat);
+void TRACE_surf_link_set_bandwidth (double date, void *link, double bandwidth);
+void TRACE_surf_link_set_latency (double date, void *link, double latency);