+typedef struct ns3_node {
+ int node_num;
+} s_ns3_node_t, *ns3_node_t;
+
+XBT_PUBLIC_DATA(int) NS3_EXTENSION_ID;
+
+SG_BEGIN_DECL()
+
+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 maxSeconds);
+XBT_PUBLIC(void *) ns3_add_host_cluster(const char * id);
+XBT_PUBLIC(void *) ns3_add_router(const char * id);
+XBT_PUBLIC(void) ns3_add_link(int src, int dst, char * bw,char * lat);
+XBT_PUBLIC(void) ns3_add_cluster(char * bw,char * lat,const char *id);
+
+inline
+ns3_node_t ns3_find_host(const char* id)
+{
+ sg_host_t host = sg_host_by_name(id);
+ if (host == nullptr)
+ return nullptr;
+ else
+ return (ns3_node_t) host->extension(NS3_EXTENSION_ID);