SG_BEGIN_DECL()
-XBT_PUBLIC(int) ns3_initialize(const char* TcpProtocol);
-XBT_PUBLIC(int) ns3_create_flow(const char* a,const char *b,double start,u_int32_t TotalBytes,simgrid::surf::NetworkNS3Action * action);
+XBT_PUBLIC(void) ns3_initialize(const char* TcpProtocol);
+XBT_PUBLIC(void) ns3_create_flow(const char* a,const char *b,double start,u_int32_t TotalBytes,simgrid::surf::NetworkNS3Action * action);
XBT_PUBLIC(void) ns3_simulator(double min);
XBT_PUBLIC(void *) ns3_add_host_cluster(const char * id);
XBT_PUBLIC(void *) ns3_add_router(const char * id);