1 /* Copyright (c) 2007-2020. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include <unordered_set>
9 #include "xbt/config.hpp"
10 #include "xbt/string.hpp"
11 #include "xbt/utility.hpp"
13 #include <ns3/core-module.h>
14 #include <ns3/csma-helper.h>
15 #include <ns3/global-route-manager.h>
16 #include <ns3/internet-stack-helper.h>
17 #include <ns3/ipv4-address-helper.h>
18 #include <ns3/packet-sink-helper.h>
19 #include <ns3/point-to-point-helper.h>
20 #include <ns3/application-container.h>
21 #include <ns3/event-id.h>
23 #include "ns3/wifi-module.h"
24 #include "ns3/mobility-module.h"
26 #include "network_ns3.hpp"
27 #include "ns3/ns3_simulator.hpp"
29 #include "simgrid/kernel/routing/NetPoint.hpp"
30 #include "simgrid/plugins/energy.h"
31 #include "simgrid/s4u/Engine.hpp"
32 #include "simgrid/s4u/NetZone.hpp"
33 #include "src/instr/instr_private.hpp" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
34 #include "src/surf/surf_interface.hpp"
35 #include "src/surf/xml/platf_private.hpp"
36 #include "surf/surf.hpp"
38 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ns3, surf, "Logging specific to the SURF network ns-3 module");
40 std::vector<std::string> IPV4addr;
41 static std::string transformIpv4Address(ns3::Ipv4Address from);
47 extern std::map<std::string, SgFlow*> flow_from_sock;
48 extern std::map<std::string, ns3::ApplicationContainer> sink_from_sock;
50 static ns3::InternetStackHelper stack;
51 static ns3::NodeContainer nodes;
52 static ns3::NodeContainer Cluster_nodes;
53 static ns3::Ipv4InterfaceContainer interfaces;
55 static int number_of_nodes = 0;
56 static int number_of_clusters_nodes = 0;
57 static int number_of_links = 1;
58 static int number_of_networks = 1;
61 static ns3::WifiHelper wifi;
62 static ns3::YansWifiPhyHelper wifiPhy = ns3::YansWifiPhyHelper::Default ();
63 static ns3::YansWifiChannelHelper wifiChannel = ns3::YansWifiChannelHelper::Default ();
64 static ns3::WifiMacHelper wifiMac;
65 static ns3::MobilityHelper mobility;
67 simgrid::xbt::Extension<simgrid::kernel::routing::NetPoint, NetPointNs3> NetPointNs3::EXTENSION_ID;
69 NetPointNs3::NetPointNs3() : ns3_node_(ns3::CreateObject<ns3::Node>(0))
71 stack.Install(ns3_node_);
73 node_num = number_of_nodes++;
76 WifiZone::WifiZone(std::string name_, simgrid::s4u::Host* host_, ns3::Ptr<ns3::Node> ap_node_,
77 ns3::Ptr<ns3::YansWifiChannel> channel_, int mcs_, int nss_, int network_, int link_) :
78 name(name_), host(host_), ap_node(ap_node_), channel(channel_), mcs(mcs_), nss(nss_),
79 network(network_), link(link_) {
81 wifi_zones[name_] = this;
84 bool WifiZone::is_ap(ns3::Ptr<ns3::Node> node){
85 for (std::pair<std::string, WifiZone*> zone : wifi_zones)
86 if (zone.second->get_ap_node() == node)
91 WifiZone* WifiZone::by_name(std::string name) {
94 zone = wifi_zones.at(name);
96 catch (const std::out_of_range& oor) {
102 std::unordered_map<std::string, WifiZone*> WifiZone::wifi_zones;
104 static void initialize_ns3_wifi() {
105 wifi.SetStandard (ns3::WIFI_PHY_STANDARD_80211n_5GHZ);
106 for (auto host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
107 const char* wifi_link = host->get_property("wifi_link");
108 const char* wifi_mcs = host->get_property("wifi_mcs");
109 const char* wifi_nss = host->get_property("wifi_nss");
112 new WifiZone(wifi_link, host, host->get_netpoint()->extension<NetPointNs3>()->ns3_node_,
113 wifiChannel.Create(), wifi_mcs ? atoi(wifi_mcs) : 3, wifi_nss ? atoi(wifi_nss) : 1, 0, 0);
121 static void clusterCreation_cb(simgrid::kernel::routing::ClusterCreationArgs const& cluster)
123 for (int const& i : *cluster.radicals) {
124 // Routers don't create a router on the other end of the private link by themselves.
125 // We just need this router to be given an ID so we create a temporary NetPointNS3 so that it gets one
126 auto* host_dst = new NetPointNs3();
128 // Create private link
129 std::string host_id = cluster.prefix + std::to_string(i) + cluster.suffix;
130 auto* host_src = simgrid::s4u::Host::by_name(host_id)->get_netpoint()->extension<NetPointNs3>();
131 xbt_assert(host_src, "Cannot find a ns-3 host of name %s", host_id.c_str());
133 // Any ns-3 route is symmetrical
134 ns3_add_direct_route(host_src, host_dst, cluster.bw, cluster.lat, cluster.id, cluster.sharing_policy);
139 //Create link backbone
140 ns3_add_cluster(cluster.id.c_str(), cluster.bb_bw, cluster.bb_lat);
143 static void routeCreation_cb(bool symmetrical, simgrid::kernel::routing::NetPoint* src,
144 simgrid::kernel::routing::NetPoint* dst, simgrid::kernel::routing::NetPoint* /*gw_src*/,
145 simgrid::kernel::routing::NetPoint* /*gw_dst*/,
146 std::vector<simgrid::kernel::resource::LinkImpl*> const& link_list)
148 if (link_list.size() == 1) {
149 auto* link = static_cast<simgrid::kernel::resource::LinkNS3*>(link_list[0]);
151 XBT_DEBUG("Route from '%s' to '%s' with link '%s' %s %s", src->get_cname(), dst->get_cname(), link->get_cname(),
152 (link->get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI ? "(wifi)" : "(wired)"),
153 (symmetrical ? "(symmetrical)" : "(not symmetrical)"));
155 // XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
156 XBT_DEBUG("\tLink (%s) bw:%fbps lat:%fs", link->get_cname(), link->get_bandwidth(), link->get_latency());
159 auto* host_src = src->extension<NetPointNs3>();
160 auto* host_dst = dst->extension<NetPointNs3>();
162 host_src->set_name(src->get_name());
163 host_dst->set_name(dst->get_name());
165 xbt_assert(host_src != nullptr, "Network element %s does not seem to be ns-3-ready", src->get_cname());
166 xbt_assert(host_dst != nullptr, "Network element %s does not seem to be ns-3-ready", dst->get_cname());
168 ns3_add_direct_route(host_src, host_dst, link->get_bandwidth(), link->get_latency(), link->get_name(), link->get_sharing_policy());
170 static bool warned_about_long_routes = false;
172 if (not warned_about_long_routes)
173 XBT_WARN("Ignoring a route between %s and %s of length %zu: Only routes of length 1 are considered with ns-3.\n"
174 "WARNING: You can ignore this warning if your hosts can still communicate when only considering routes "
176 "WARNING: Remove long routes to avoid this harmless message; subsequent long routes will be silently "
178 src->get_cname(), dst->get_cname(), link_list.size());
179 warned_about_long_routes = true;
183 /* Create the ns3 topology based on routing strategy */
184 static void postparse_cb()
186 IPV4addr.shrink_to_fit();
187 ns3::GlobalRouteManager::BuildGlobalRoutingDatabase();
188 ns3::GlobalRouteManager::InitializeRoutes();
194 void surf_network_model_init_NS3()
196 xbt_assert(surf_network_model == nullptr, "Cannot set the network model twice");
198 surf_network_model = new simgrid::kernel::resource::NetworkNS3Model();
201 static simgrid::config::Flag<std::string>
202 ns3_tcp_model("ns3/TcpModel", "The ns-3 tcp model can be : NewReno or Reno or Tahoe", "default");
208 NetworkNS3Model::NetworkNS3Model() : NetworkModel(Model::UpdateAlgo::FULL)
210 xbt_assert(not sg_link_energy_is_inited(),
211 "LinkEnergy plugin and ns-3 network models are not compatible. Are you looking for Ecofen, maybe?");
213 all_existing_models.push_back(this);
215 NetPointNs3::EXTENSION_ID = routing::NetPoint::extension_create<NetPointNs3>();
217 ns3_initialize(ns3_tcp_model.get());
219 routing::NetPoint::on_creation.connect([](routing::NetPoint& pt) {
220 pt.extension_set<NetPointNs3>(new NetPointNs3());
221 XBT_VERB("SimGrid's %s is known as node %d within ns-3", pt.get_cname(), pt.extension<NetPointNs3>()->node_num);
223 routing::on_cluster_creation.connect(&clusterCreation_cb);
225 s4u::Engine::on_platform_created.connect(&postparse_cb);
226 s4u::NetZone::on_route_creation.connect(&routeCreation_cb);
229 NetworkNS3Model::~NetworkNS3Model() {
233 LinkImpl* NetworkNS3Model::create_link(const std::string& name, const std::vector<double>& bandwidths, double latency,
234 s4u::Link::SharingPolicy policy)
236 xbt_assert(bandwidths.size() == 1, "ns-3 links must use only 1 bandwidth.");
237 return new LinkNS3(this, name, bandwidths[0], latency, policy);
240 Action* NetworkNS3Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
242 xbt_assert(rate == -1,
243 "Communication over ns-3 links cannot specify a specific rate. Please use -1 as a value instead of %f.",
245 return new NetworkNS3Action(this, size, src, dst);
248 double NetworkNS3Model::next_occurring_event(double now)
250 double time_to_next_flow_completion = 0.0;
251 XBT_DEBUG("ns3_next_occurring_event");
253 //get the first relevant value from the running_actions list
255 // If there is no comms in NS-3, then we do not move it forward.
256 // We will synchronize NS-3 with SimGrid when starting a new communication.
257 // (see NetworkNS3Action::NetworkNS3Action() for more details on this point)
258 if (get_started_action_set()->empty() || now == 0.0)
261 XBT_DEBUG("doing a ns3 simulation for a duration of %f", now);
263 time_to_next_flow_completion = ns3::Simulator::Now().GetSeconds() - surf_get_clock();
264 // NS-3 stops as soon as a flow ends,
265 // but it does not process the other flows that may finish at the same (simulated) time.
266 // If another flow ends at the same time, time_to_next_flow_completion = 0
267 if(double_equals(time_to_next_flow_completion, 0, sg_surf_precision))
268 time_to_next_flow_completion = 0.0;
270 XBT_DEBUG("min : %f", now);
271 XBT_DEBUG("ns3 time : %f", ns3::Simulator::Now().GetSeconds());
272 XBT_DEBUG("surf time : %f", surf_get_clock());
273 XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
275 return time_to_next_flow_completion;
278 void NetworkNS3Model::update_actions_state(double now, double delta)
280 static std::vector<std::string> socket_to_destroy;
282 std::string ns3_socket;
283 for (const auto& elm : flow_from_sock) {
284 ns3_socket = elm.first;
285 SgFlow* sgFlow = elm.second;
286 NetworkNS3Action * action = sgFlow->action_;
287 XBT_DEBUG("Processing socket %p (action %p)",sgFlow,action);
288 // Because NS3 stops as soon as a flow is finished, the other flows that ends at the same time may remains in an
289 // inconsistent state (i.e. remains_ == 0 but finished_ == false).
290 // However, SimGrid considers sometimes that an action with remains_ == 0 is finished.
291 // Thus, to avoid inconsistencies between SimGrid and NS3, set remains to 0 only when the flow is finished in NS3
292 int remains = action->get_cost() - sgFlow->sent_bytes_;
294 action->set_remains(remains);
296 if (TRACE_is_enabled() && action->get_state() == kernel::resource::Action::State::STARTED) {
297 double data_delta_sent = sgFlow->sent_bytes_ - action->last_sent_;
299 std::vector<LinkImpl*> route = std::vector<LinkImpl*>();
301 action->get_src().route_to(&action->get_dst(), route, nullptr);
302 for (auto const& link : route)
303 instr::resource_set_utilization("LINK", "bandwidth_used", link->get_cname(), action->get_category(),
304 (data_delta_sent) / delta, now - delta, delta);
306 action->last_sent_ = sgFlow->sent_bytes_;
309 if(sgFlow->finished_){
310 socket_to_destroy.push_back(ns3_socket);
311 XBT_DEBUG("Destroy socket %p of action %p", ns3_socket.c_str(), action);
312 action->set_remains(0);
313 action->finish(Action::State::FINISHED);
315 XBT_DEBUG("Socket %p sent %u bytes out of %u (%u remaining)", ns3_socket.c_str(), sgFlow->sent_bytes_,
316 sgFlow->total_bytes_, sgFlow->remaining_);
320 while (not socket_to_destroy.empty()) {
321 ns3_socket = socket_to_destroy.back();
322 socket_to_destroy.pop_back();
323 SgFlow* flow = flow_from_sock.at(ns3_socket);
324 if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
325 XBT_DEBUG("Removing socket %p of action %p", ns3_socket.c_str(), flow->action_);
328 flow_from_sock.erase(ns3_socket);
329 sink_from_sock.erase(ns3_socket);
337 LinkNS3::LinkNS3(NetworkNS3Model* model, const std::string& name, double bandwidth, double latency,
338 s4u::Link::SharingPolicy policy)
339 : LinkImpl(model, name, nullptr)
341 bandwidth_.peak = bandwidth;
342 latency_.peak = latency;
343 sharing_policy_ = policy;
345 if (policy == simgrid::s4u::Link::SharingPolicy::WIFI) {
346 static bool wifi_init = false;
348 initialize_ns3_wifi();
352 ns3::NetDeviceContainer netA;
353 WifiZone* zone = WifiZone::by_name(name);
354 xbt_assert(zone != 0, "Link name '%s' does not match the 'wifi_link' property of a host.", name.c_str());
355 NetPointNs3* netpoint_ns3 = zone->get_host()->get_netpoint()->extension<NetPointNs3>();
357 wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
358 "ControlMode", ns3::StringValue ("HtMcs0"),
359 "DataMode", ns3::StringValue ("HtMcs" + std::to_string(zone->get_mcs())));
361 wifiPhy.SetChannel (zone->get_channel());
362 wifiPhy.Set("Antennas", ns3::UintegerValue(zone->get_nss()));
363 wifiPhy.Set("MaxSupportedTxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
364 wifiPhy.Set("MaxSupportedRxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
365 wifiMac.SetType("ns3::ApWifiMac",
366 "Ssid", ns3::SsidValue(name));
368 netA.Add(wifi.Install (wifiPhy, wifiMac, zone->get_ap_node()));
370 ns3::Ptr<ns3::ListPositionAllocator> positionAllocS = ns3::CreateObject<ns3::ListPositionAllocator> ();
371 positionAllocS->Add(ns3::Vector(0, 0, 0));
372 mobility.SetPositionAllocator(positionAllocS);
373 mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
374 mobility.Install(zone->get_ap_node());
376 ns3::Ipv4AddressHelper address;
377 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
378 address.SetBase(addr.c_str(), "255.255.0.0");
379 XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
380 interfaces.Add(address.Assign (netA));
381 zone->set_network(number_of_networks);
382 zone->set_link(number_of_links);
384 int nodeNum = netpoint_ns3->node_num;
385 if (IPV4addr.size() <= (unsigned)nodeNum)
386 IPV4addr.resize(nodeNum + 1);
387 IPV4addr[nodeNum] = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 1));
389 if (number_of_links == 255){
390 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
392 number_of_networks++;
397 s4u::Link::on_creation(*this->get_iface());
400 LinkNS3::~LinkNS3() = default;
402 void LinkNS3::apply_event(profile::Event*, double)
406 void LinkNS3::set_bandwidth_profile(profile::Profile*)
408 xbt_die("The ns-3 network model doesn't support bandwidth profiles");
410 void LinkNS3::set_latency_profile(profile::Profile*)
412 xbt_die("The ns-3 network model doesn't support latency profiles");
419 NetworkNS3Action::NetworkNS3Action(Model* model, double totalBytes, s4u::Host* src, s4u::Host* dst)
420 : NetworkAction(model, *src, *dst, totalBytes, false)
422 // If there is no other started actions, we need to move NS-3 forward to be sync with SimGrid
423 if (model->get_started_action_set()->size()==1){
424 while(double_positive(surf_get_clock() - ns3::Simulator::Now().GetSeconds(), sg_surf_precision)){
425 XBT_DEBUG("Synchronizing NS-3 (time %f) with SimGrid (time %f)", ns3::Simulator::Now().GetSeconds(), surf_get_clock());
426 ns3_simulator(surf_get_clock() - ns3::Simulator::Now().GetSeconds());
430 XBT_DEBUG("Communicate from %s to %s", src->get_cname(), dst->get_cname());
432 static int port_number = 1025; // Port number is limited from 1025 to 65 000
434 unsigned int node1 = src->get_netpoint()->extension<NetPointNs3>()->node_num;
435 unsigned int node2 = dst->get_netpoint()->extension<NetPointNs3>()->node_num;
437 ns3::Ptr<ns3::Node> src_node = src->get_netpoint()->extension<NetPointNs3>()->ns3_node_;
438 ns3::Ptr<ns3::Node> dst_node = dst->get_netpoint()->extension<NetPointNs3>()->ns3_node_;
440 xbt_assert(node2 < IPV4addr.size(), "Element %s is unknown to ns-3. Is it connected to any one-hop link?",
441 dst->get_netpoint()->get_cname());
442 std::string& addr = IPV4addr[node2];
443 xbt_assert(not addr.empty(), "Element %s is unknown to ns-3. Is it connected to any one-hop link?",
444 dst->get_netpoint()->get_cname());
446 XBT_DEBUG("ns3: Create flow of %.0f Bytes from %u to %u with Interface %s", totalBytes, node1, node2, addr.c_str());
447 ns3::PacketSinkHelper sink("ns3::TcpSocketFactory", ns3::InetSocketAddress(ns3::Ipv4Address::GetAny(), port_number));
448 ns3::ApplicationContainer apps = sink.Install(dst_node);
450 ns3::Ptr<ns3::Socket> sock = ns3::Socket::CreateSocket(src_node, ns3::TcpSocketFactory::GetTypeId());
452 flow_from_sock.insert({transform_socket_ptr(sock), new SgFlow(totalBytes, this)});
453 sink_from_sock.insert({transform_socket_ptr(sock), apps});
455 sock->Bind(ns3::InetSocketAddress(port_number));
457 ns3::Simulator::ScheduleNow(&start_flow, sock, addr.c_str(), port_number);
460 if(port_number > 65000){
462 XBT_WARN("Too many connections! Port number is saturated. Trying to use the oldest ports.");
464 xbt_assert(port_number <= 65000, "Too many connections! Port number is saturated.");
466 s4u::Link::on_communicate(*this);
469 void NetworkNS3Action::suspend() {
473 void NetworkNS3Action::resume() {
477 std::list<LinkImpl*> NetworkNS3Action::get_links() const
481 void NetworkNS3Action::update_remains_lazy(double /*now*/)
486 } // namespace resource
487 } // namespace kernel
488 } // namespace simgrid
490 void ns3_simulator(double maxSeconds)
493 if (maxSeconds > 0.0) // If there is a maximum amount of time to run
494 id = ns3::Simulator::Schedule(ns3::Seconds(maxSeconds), &ns3::Simulator::Stop);
496 XBT_DEBUG("Start simulator for at most %fs (current time: %f)", maxSeconds, surf_get_clock());
497 ns3::Simulator::Run ();
498 XBT_DEBUG("Simulator stopped at %fs", ns3::Simulator::Now().GetSeconds());
504 // initialize the ns-3 interface and environment
505 void ns3_initialize(std::string TcpProtocol)
512 ns3::Config::SetDefault ("ns3::TcpSocket::SegmentSize", ns3::UintegerValue (1000));
513 ns3::Config::SetDefault ("ns3::TcpSocket::DelAckCount", ns3::UintegerValue (1));
514 ns3::Config::SetDefault ("ns3::TcpSocketBase::Timestamp", ns3::BooleanValue (false));
516 if (TcpProtocol == "default") {
519 } else if (TcpProtocol == "Reno") {
520 XBT_INFO("Switching Tcp protocol to '%s'", TcpProtocol.c_str());
521 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpReno"));
523 } else if (TcpProtocol == "NewReno") {
524 XBT_INFO("Switching Tcp protocol to '%s'", TcpProtocol.c_str());
525 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpNewReno"));
527 } else if (TcpProtocol == "Tahoe") {
528 XBT_INFO("Switching Tcp protocol to '%s'", TcpProtocol.c_str());
529 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpTahoe"));
532 xbt_die("The ns3/TcpModel must be: NewReno or Reno or Tahoe");
536 void ns3_add_cluster(const char* /*id*/, double bw, double lat)
538 ns3::NodeContainer Nodes;
540 for (unsigned int i = number_of_clusters_nodes; i < Cluster_nodes.GetN(); i++) {
541 Nodes.Add(Cluster_nodes.Get(i));
542 XBT_DEBUG("Add node %u to cluster", i);
544 number_of_clusters_nodes = Cluster_nodes.GetN();
546 XBT_DEBUG("Add router %u to cluster", nodes.GetN() - Nodes.GetN() - 1);
547 Nodes.Add(nodes.Get(nodes.GetN()-Nodes.GetN()-1));
549 xbt_assert(Nodes.GetN() <= 65000, "Cluster with ns-3 is limited to 65000 nodes");
550 ns3::CsmaHelper csma;
551 csma.SetChannelAttribute("DataRate", ns3::DataRateValue(ns3::DataRate(bw * 8))); // ns-3 takes bps, but we provide Bps
552 csma.SetChannelAttribute("Delay", ns3::TimeValue(ns3::Seconds(lat)));
553 ns3::NetDeviceContainer devices = csma.Install(Nodes);
554 XBT_DEBUG("Create CSMA");
556 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
557 XBT_DEBUG("Assign IP Addresses %s to CSMA.", addr.c_str());
558 ns3::Ipv4AddressHelper ipv4;
559 ipv4.SetBase(addr.c_str(), "255.255.0.0");
560 interfaces.Add(ipv4.Assign (devices));
562 if(number_of_links == 255){
563 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
565 number_of_networks++;
569 XBT_DEBUG("Number of nodes in Cluster_nodes: %u", Cluster_nodes.GetN());
572 static std::string transformIpv4Address(ns3::Ipv4Address from)
574 std::stringstream sstream;
576 return sstream.str();
579 void ns3_add_direct_route(NetPointNs3* src, NetPointNs3* dst, double bw, double lat, std::string link_name,
580 simgrid::s4u::Link::SharingPolicy policy)
582 ns3::Ipv4AddressHelper address;
583 ns3::NetDeviceContainer netA;
585 int srcNum = src->node_num;
586 int dstNum = dst->node_num;
588 ns3::Ptr<ns3::Node> a = src->ns3_node_;
589 ns3::Ptr<ns3::Node> b = dst->ns3_node_;
591 if (policy == simgrid::s4u::Link::SharingPolicy::WIFI) {
592 xbt_assert(WifiZone::is_ap(a) != WifiZone::is_ap(b), "A wifi route can only exist between an access point node and a station node.");
594 ns3::Ptr<ns3::Node> apNode = WifiZone::is_ap(a) ? a : b;
595 ns3::Ptr<ns3::Node> staNode = apNode == a ? b : a;
597 WifiZone* zone = WifiZone::by_name(link_name);
599 wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
600 "ControlMode", ns3::StringValue ("HtMcs0"),
601 "DataMode", ns3::StringValue ("HtMcs" + std::to_string(zone->get_mcs())));
603 wifiPhy.SetChannel (zone->get_channel());
604 wifiPhy.Set("Antennas", ns3::UintegerValue(zone->get_nss()));
605 wifiPhy.Set("MaxSupportedTxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
606 wifiPhy.Set("MaxSupportedRxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
608 wifiMac.SetType ("ns3::StaWifiMac",
609 "Ssid", ns3::SsidValue(link_name),
610 "ActiveProbing", ns3::BooleanValue(false));
612 netA.Add(wifi.Install (wifiPhy, wifiMac, staNode));
614 ns3::Config::Set ("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/ChannelWidth", ns3::UintegerValue (40));
616 NetPointNs3* sta_netpointNs3 = WifiZone::is_ap(src->ns3_node_) ? dst : src;
617 const char* wifi_distance = simgrid::s4u::Host::by_name(sta_netpointNs3->name_)->get_property("wifi_distance");
618 ns3::Ptr<ns3::ListPositionAllocator> positionAllocS = ns3::CreateObject<ns3::ListPositionAllocator> ();
619 positionAllocS->Add(ns3::Vector( wifi_distance ? atof(wifi_distance) : 10.0 , 0, 0));
620 mobility.SetPositionAllocator(positionAllocS);
621 mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
622 mobility.Install(staNode);
624 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", zone->get_network(), zone->get_link());
625 address.SetBase(addr.c_str(), "255.255.0.0", ("0.0.0." + std::to_string(zone->get_n_sta_nodes() + 2)).c_str());
626 zone->add_sta_node();
627 XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
628 interfaces.Add(address.Assign (netA));
629 if (IPV4addr.size() <= (unsigned)dstNum)
630 IPV4addr.resize(dstNum + 1);
631 IPV4addr[dstNum] = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 1));
633 ns3::PointToPointHelper pointToPoint;
634 XBT_DEBUG("\tAdd PTP from %d to %d bw:'%f Bps' lat:'%fs'", srcNum, dstNum, bw, lat);
635 pointToPoint.SetDeviceAttribute("DataRate",
636 ns3::DataRateValue(ns3::DataRate(bw * 8))); // ns-3 takes bps, but we provide Bps
637 pointToPoint.SetChannelAttribute("Delay", ns3::TimeValue(ns3::Seconds(lat)));
639 netA.Add(pointToPoint.Install(a, b));
641 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
642 address.SetBase(addr.c_str(), "255.255.0.0");
643 XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
644 interfaces.Add(address.Assign (netA));
646 if (IPV4addr.size() <= (unsigned)srcNum)
647 IPV4addr.resize(srcNum + 1);
648 IPV4addr[srcNum] = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 2));
650 if (IPV4addr.size() <= (unsigned)dstNum)
651 IPV4addr.resize(dstNum + 1);
652 IPV4addr[dstNum] = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 1));
654 if (number_of_links == 255){
655 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
657 number_of_networks++;