+/* Copyright (c) 2007-2013. The SimGrid Team.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+#include "network_ns3.hpp"
+#include "surf_private.h"
+#include "simgrid/sg_config.h"
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_ns3, surf,
+ "Logging specific to the SURF network NS3 module");
+
+extern xbt_lib_t host_lib;
+extern xbt_lib_t link_lib;
+extern xbt_lib_t as_router_lib;
+
+extern xbt_dict_t dict_socket;
+
+xbt_dynar_t IPV4addr;
+static double time_to_next_flow_completion = -1;
+
+/*************
+ * Callbacks *
+ *************/
+
+static void replace_bdw_ns3(char ** bdw)
+{
+ char *temp = xbt_strdup(*bdw);
+ xbt_free(*bdw);
+ *bdw = bprintf("%fBps",atof(temp));
+ xbt_free(temp);
+
+}
+
+static void replace_lat_ns3(char ** lat)
+{
+ char *temp = xbt_strdup(*lat);
+ xbt_free(*lat);
+ *lat = bprintf("%fs",atof(temp));
+ xbt_free(temp);
+}
+
+static void parse_ns3_add_host(sg_platf_host_cbarg_t host)
+{
+ XBT_DEBUG("NS3_ADD_HOST '%s'",host->id);
+ xbt_lib_set(host_lib,
+ host->id,
+ NS3_HOST_LEVEL,
+ ns3_add_host(host->id)
+ );
+}
+
+static void parse_ns3_add_link(sg_platf_link_cbarg_t link)
+{
+ XBT_DEBUG("NS3_ADD_LINK '%s'",link->id);
+
+ if(!IPV4addr) IPV4addr = xbt_dynar_new(sizeof(char*),free);
+
+ NetworkLinkPtr net_link = surf_network_model->createResource(link->id,
+ link->bandwidth,
+ link->bandwidth_trace,
+ link->latency,
+ link->latency_trace,
+ link->state,
+ link->state_trace,
+ link->policy,
+ link->properties);
+ xbt_lib_set(link_lib, link->id, SURF_LINK_LEVEL, net_link);
+}
+
+static void parse_ns3_add_router(sg_platf_router_cbarg_t router)
+{
+ XBT_DEBUG("NS3_ADD_ROUTER '%s'",router->id);
+ xbt_lib_set(as_router_lib,
+ router->id,
+ NS3_ASR_LEVEL,
+ ns3_add_router(router->id)
+ );
+}
+
+static void parse_ns3_add_AS(sg_platf_AS_cbarg_t AS)
+{
+ XBT_DEBUG("NS3_ADD_AS '%s'",AS->id);
+ xbt_lib_set(as_router_lib,
+ AS->id,
+ NS3_ASR_LEVEL,
+ ns3_add_AS(AS->id)
+ );
+}
+
+static void parse_ns3_add_cluster(sg_platf_cluster_cbarg_t cluster)
+{
+ const char *cluster_prefix = cluster->prefix;
+ const char *cluster_suffix = cluster->suffix;
+ const char *cluster_radical = cluster->radical;
+ const char *cluster_bb_bw = bprintf("%f",cluster->bb_bw);
+ const char *cluster_bb_lat = bprintf("%f",cluster->bb_lat);
+ const char *cluster_bw = bprintf("%f",cluster->bw);
+ const char *cluster_lat = bprintf("%f",cluster->lat);
+ const char *groups = NULL;
+
+ int start, end, i;
+ unsigned int iter;
+
+ xbt_dynar_t radical_elements;
+ xbt_dynar_t radical_ends;
+ xbt_dynar_t tab_elements_num = xbt_dynar_new(sizeof(int), NULL);
+
+ char *router_id,*host_id;
+
+ radical_elements = xbt_str_split(cluster_radical, ",");
+ xbt_dynar_foreach(radical_elements, iter, groups) {
+ radical_ends = xbt_str_split(groups, "-");
+
+ switch (xbt_dynar_length(radical_ends)) {
+ case 1:
+ start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
+ xbt_dynar_push_as(tab_elements_num, int, start);
+ router_id = bprintf("ns3_%s%d%s", cluster_prefix, start, cluster_suffix);
+ xbt_lib_set(host_lib,
+ router_id,
+ NS3_HOST_LEVEL,
+ ns3_add_host_cluster(router_id)
+ );
+ XBT_DEBUG("NS3_ADD_ROUTER '%s'",router_id);
+ free(router_id);
+ break;
+
+ case 2:
+ start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
+ end = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 1, char *));
+ for (i = start; i <= end; i++){
+ xbt_dynar_push_as(tab_elements_num, int, i);
+ router_id = bprintf("ns3_%s%d%s", cluster_prefix, i, cluster_suffix);
+ xbt_lib_set(host_lib,
+ router_id,
+ NS3_HOST_LEVEL,
+ ns3_add_host_cluster(router_id)
+ );
+ XBT_DEBUG("NS3_ADD_ROUTER '%s'",router_id);
+ free(router_id);
+ }
+ break;
+
+ default:
+ XBT_DEBUG("Malformed radical");
+ }
+ }
+
+ //Create links
+ unsigned int cpt;
+ int elmts;
+ char * lat = xbt_strdup(cluster_lat);
+ char * bw = xbt_strdup(cluster_bw);
+ replace_lat_ns3(&lat);
+ replace_bdw_ns3(&bw);
+
+ xbt_dynar_foreach(tab_elements_num,cpt,elmts)
+ {
+ host_id = bprintf("%s%d%s", cluster_prefix, elmts, cluster_suffix);
+ router_id = bprintf("ns3_%s%d%s", cluster_prefix, elmts, cluster_suffix);
+ XBT_DEBUG("Create link from '%s' to '%s'",host_id,router_id);
+
+ ns3_nodes_t host_src = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,host_id, NS3_HOST_LEVEL));
+ ns3_nodes_t host_dst = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,router_id,NS3_HOST_LEVEL));
+
+ if(host_src && host_dst){}
+ else xbt_die("\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
+
+ ns3_add_link(host_src->node_num,host_src->type,
+ host_dst->node_num,host_dst->type,
+ bw,lat);
+
+ free(router_id);
+ free(host_id);
+ }
+ xbt_dynar_free(&tab_elements_num);
+
+
+ //Create link backbone
+ lat = xbt_strdup(cluster_bb_lat);
+ bw = xbt_strdup(cluster_bb_bw);
+ replace_lat_ns3(&lat);
+ replace_bdw_ns3(&bw);
+ ns3_add_cluster(bw,lat,cluster->id);
+ xbt_free(lat);
+ xbt_free(bw);
+}
+
+/* Create the ns3 topology based on routing strategy */
+static void create_ns3_topology(void)
+{
+ XBT_DEBUG("Starting topology generation");
+
+ xbt_dynar_shrink(IPV4addr,0);
+
+ //get the onelinks from the parsed platform
+ xbt_dynar_t onelink_routes = routing_platf->getOneLinkRoutes();
+ if (!onelink_routes)
+ xbt_die("There is no routes!");
+ XBT_DEBUG("Have get_onelink_routes, found %ld routes",onelink_routes->used);
+ //save them in trace file
+ OnelinkPtr onelink;
+ unsigned int iter;
+ xbt_dynar_foreach(onelink_routes, iter, onelink) {
+ char *src = onelink->p_src->getName();
+ char *dst = onelink->p_dst->getName();
+ NetworkNS3LinkPtr link = static_cast<NetworkNS3LinkPtr>(onelink->p_link);
+
+ if (strcmp(src,dst) && link->m_created){
+ XBT_DEBUG("Route from '%s' to '%s' with link '%s'", src, dst, link->getName());
+ char * link_bdw = xbt_strdup(link->p_bdw);
+ char * link_lat = xbt_strdup(link->p_lat);
+ replace_lat_ns3(&link_lat);
+ replace_bdw_ns3(&link_bdw);
+ link->m_created = 0;
+
+ // XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
+ XBT_DEBUG("\tLink (%s) bdw:%s lat:%s", link->getName(), link_bdw, link_lat);
+
+ //create link ns3
+ ns3_nodes_t host_src = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,src,NS3_HOST_LEVEL));
+ if(!host_src) host_src = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(as_router_lib,src,NS3_ASR_LEVEL));
+ ns3_nodes_t host_dst = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(host_lib,dst,NS3_HOST_LEVEL));
+ if(!host_dst) host_dst = static_cast<ns3_nodes_t>(xbt_lib_get_or_null(as_router_lib,dst,NS3_ASR_LEVEL));
+
+ if(host_src && host_dst){}
+ else xbt_die("\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
+
+ ns3_add_link(host_src->node_num,host_src->type,host_dst->node_num,host_dst->type,link_bdw,link_lat);
+
+ xbt_free(link_bdw);
+ xbt_free(link_lat);
+ }
+ }
+}
+
+static void parse_ns3_end_platform(void)
+{
+ ns3_end_platform();
+}
+
+static void define_callbacks_ns3(void)
+{
+ sg_platf_host_add_cb (&parse_ns3_add_host);
+ sg_platf_router_add_cb (&parse_ns3_add_router);
+ sg_platf_link_add_cb (&parse_ns3_add_link);
+ sg_platf_cluster_add_cb (&parse_ns3_add_cluster);
+ sg_platf_AS_begin_add_cb (&parse_ns3_add_AS);
+ sg_platf_postparse_add_cb(&create_ns3_topology); //get_one_link_routes
+ sg_platf_postparse_add_cb(&parse_ns3_end_platform); //InitializeRoutes
+}
+
+/*********
+ * Model *
+ *********/
+static void free_ns3_link(void * elmts)
+{
+ delete static_cast<NetworkNS3LinkPtr>(elmts);
+}
+
+static void free_ns3_host(void * elmts)
+{
+ ns3_nodes_t host = static_cast<ns3_nodes_t>(elmts);
+ free(host);
+}
+
+void surf_network_model_init_NS3()
+{
+ if (surf_network_model)
+ return;
+
+ surf_network_model = new NetworkNS3Model();
+
+ xbt_dynar_push(model_list, &surf_network_model);
+}
+
+NetworkNS3Model::NetworkNS3Model() : NetworkModel("network NS3") {
+ if (ns3_initialize(xbt_cfg_get_string(_sg_cfg_set, "ns3/TcpModel"))) {
+ xbt_die("Impossible to initialize NS3 interface");
+ }
+ routing_model_create(NULL);
+ define_callbacks_ns3();
+
+ NS3_HOST_LEVEL = xbt_lib_add_level(host_lib,(void_f_pvoid_t)free_ns3_host);
+ NS3_ASR_LEVEL = xbt_lib_add_level(as_router_lib,(void_f_pvoid_t)free_ns3_host);
+ NS3_LINK_LEVEL = xbt_lib_add_level(link_lib,(void_f_pvoid_t)free_ns3_link);
+}
+
+NetworkNS3Model::~NetworkNS3Model() {
+ ns3_finalize();
+ xbt_dynar_free_container(&IPV4addr);
+ xbt_dict_free(&dict_socket);
+}
+
+NetworkLinkPtr NetworkNS3Model::createResource(const char *name,
+ double bw_initial,
+ tmgr_trace_t bw_trace,
+ double lat_initial,
+ tmgr_trace_t lat_trace,
+ e_surf_resource_state_t state_initial,
+ tmgr_trace_t state_trace,
+ e_surf_link_sharing_policy_t policy,
+ xbt_dict_t properties){
+ if (bw_trace)
+ XBT_INFO("The NS3 network model doesn't support bandwidth state traces");
+ if (lat_trace)
+ XBT_INFO("The NS3 network model doesn't support latency state traces");
+ if (state_trace)
+ XBT_INFO("The NS3 network model doesn't support link state traces");
+ return new NetworkNS3Link(this, name, properties, bw_initial, lat_initial);
+}
+
+xbt_dynar_t NetworkNS3Model::getRoute(RoutingEdgePtr src, RoutingEdgePtr dst)
+{
+ xbt_dynar_t route = NULL;
+ routing_get_route_and_latency(src, dst, &route, NULL);
+ //routing_platf->getRouteAndLatency(src, dst, &route, NULL);
+ return route;
+}
+
+ActionPtr NetworkNS3Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
+ double size, double rate)
+{
+ XBT_DEBUG("Communicate from %s to %s", src->getName(), dst->getName());
+ NetworkNS3ActionPtr action = new NetworkNS3Action(this, size, 0);
+
+ ns3_create_flow(src->getName(), dst->getName(), surf_get_clock(), size, action);
+
+#ifdef HAVE_TRACING
+ action->m_lastSent = 0;
+ action->p_srcElm = src;
+ action->p_dstElm = dst;
+#endif
+
+ return (surf_action_t) action;
+}
+
+double NetworkNS3Model::shareResources(double now)
+{
+ XBT_DEBUG("ns3_share_resources");
+
+ //get the first relevant value from the running_actions list
+ if (!getRunningActionSet()->size() || now == 0.0)
+ return -1.0;
+ else
+ do {
+ ns3_simulator(now);
+ time_to_next_flow_completion = ns3_time() - surf_get_clock();//FIXME: use now instead ?
+ } while(double_equals(time_to_next_flow_completion, 0));
+
+ XBT_DEBUG("min : %f", now);
+ XBT_DEBUG("ns3 time : %f", ns3_time());
+ XBT_DEBUG("surf time : %f", surf_get_clock());
+ XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
+
+ return time_to_next_flow_completion;
+}
+
+void NetworkNS3Model::updateActionsState(double now, double delta)
+{
+ xbt_dict_cursor_t cursor = NULL;
+ char *key;
+ void *data;
+
+ static xbt_dynar_t socket_to_destroy = NULL;
+ if(!socket_to_destroy) socket_to_destroy = xbt_dynar_new(sizeof(char*),NULL);
+
+ /* If there are no running flows, just return */
+ if (!getRunningActionSet()->size()) {
+ while(double_positive(now-ns3_time())) {
+ ns3_simulator(now-ns3_time());
+ }
+ return;
+ }
+
+ NetworkNS3ActionPtr action;
+ xbt_dict_foreach(dict_socket,cursor,key,data){
+ action = static_cast<NetworkNS3ActionPtr>(ns3_get_socket_action(data));
+ XBT_DEBUG("Processing socket %p (action %p)",data,action);
+ action->setRemains(action->getCost() - ns3_get_socket_sent(data));
+
+ #ifdef HAVE_TRACING
+ if (TRACE_is_enabled() &&
+ action->getState() == SURF_ACTION_RUNNING){
+ double data_sent = ns3_get_socket_sent(data);
+ double data_delta_sent = data_sent - action->m_lastSent;
+
+ xbt_dynar_t route = NULL;
+
+ routing_get_route_and_latency (action->p_srcElm, action->p_dstElm, &route, NULL);
+ unsigned int i;
+ for (i = 0; i < xbt_dynar_length (route); i++){
+ NetworkNS3LinkPtr link = ((NetworkNS3LinkPtr)xbt_dynar_get_ptr (route, i));
+ TRACE_surf_link_set_utilization (link->getName(),
+ action->getCategory(),
+ (data_delta_sent)/delta,
+ now-delta,
+ delta);
+ }
+ action->m_lastSent = data_sent;
+ }
+ #endif
+
+ if(ns3_get_socket_is_finished(data) == 1){
+ xbt_dynar_push(socket_to_destroy,&key);
+ XBT_DEBUG("Destroy socket %p of action %p", key, action);
+ action->finish();
+ action->setState(SURF_ACTION_DONE);
+ }
+ }
+
+ while (!xbt_dynar_is_empty(socket_to_destroy)){
+ xbt_dynar_pop(socket_to_destroy,&key);
+
+ void *data = xbt_dict_get (dict_socket, key);
+ action = static_cast<NetworkNS3ActionPtr>(ns3_get_socket_action(data));
+ XBT_DEBUG ("Removing socket %p of action %p", key, action);
+ xbt_dict_remove(dict_socket, key);
+ }
+ return;
+}
+
+/************
+ * Resource *
+ ************/
+
+NetworkNS3Link::NetworkNS3Link(NetworkNS3ModelPtr model, const char *name, xbt_dict_t props,
+ double bw_initial, double lat_initial)
+ : NetworkLink(model, name, props)
+ , p_bdw(bprintf("%f", bw_initial))
+ , p_lat(bprintf("%f", lat_initial))
+ , m_created(1)
+{
+}
+
+NetworkNS3Link::~NetworkNS3Link()
+{
+}
+
+void NetworkNS3Link::updateState(tmgr_trace_event_t event_type, double value, double date)
+{
+
+}
+double NetworkNS3Link::getLatency()
+{
+
+}
+double NetworkNS3Link::getBandwidth()
+{
+
+}
+
+/**********
+ * Action *
+ **********/
+
+NetworkNS3Action::NetworkNS3Action(ModelPtr model, double cost, bool failed)
+: NetworkAction(model, cost, failed)
+{}
+
+#ifdef HAVE_LATENCY_BOUND_TRACKING
+ int NetworkNS3Action::getLatencyLimited() {
+ return m_latencyLimited;
+ }
+#endif
+
+ void NetworkNS3Action::suspend()
+{
+ THROW_UNIMPLEMENTED;
+}
+
+void NetworkNS3Action::resume()
+{
+ THROW_UNIMPLEMENTED;
+}
+
+ /* Test whether a flow is suspended */
+bool NetworkNS3Action::isSuspended()
+{
+ return 0;
+}
+
+int NetworkNS3Action::unref()
+{
+ m_refcount--;
+ if (!m_refcount) {
+ if (actionHook::is_linked())
+ p_stateSet->erase(p_stateSet->iterator_to(*this));
+ XBT_DEBUG ("Removing action %p", this);
+ delete this;
+ return 1;
+ }
+ return 0;
+}
