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"
11 #include "xbt/string.hpp"
12 #include "xbt/utility.hpp"
14 #include <ns3/core-module.h>
15 #include <ns3/csma-helper.h>
16 #include <ns3/global-route-manager.h>
17 #include <ns3/internet-stack-helper.h>
18 #include <ns3/ipv4-address-helper.h>
19 #include <ns3/packet-sink-helper.h>
20 #include <ns3/point-to-point-helper.h>
21 #include <ns3/application-container.h>
22 #include <ns3/event-id.h>
24 #include "ns3/mobility-module.h"
25 #include "ns3/wifi-module.h"
27 #include "network_ns3.hpp"
28 #include "ns3/ns3_simulator.hpp"
30 #include "simgrid/kernel/routing/NetPoint.hpp"
31 #include "simgrid/plugins/energy.h"
32 #include "simgrid/s4u/Engine.hpp"
33 #include "simgrid/s4u/NetZone.hpp"
34 #include "src/instr/instr_private.hpp" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
35 #include "src/surf/surf_interface.hpp"
36 #include "src/surf/xml/platf_private.hpp"
37 #include "surf/surf.hpp"
39 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ns3, surf, "Logging specific to the SURF network ns-3 module");
45 extern std::map<std::string, SgFlow*> flow_from_sock;
46 extern std::map<std::string, ns3::ApplicationContainer> sink_from_sock;
48 static ns3::InternetStackHelper stack;
50 static int number_of_links = 1;
51 static int number_of_networks = 1;
54 static ns3::WifiHelper wifi;
55 static ns3::YansWifiPhyHelper wifiPhy = ns3::YansWifiPhyHelper::Default();
56 static ns3::YansWifiChannelHelper wifiChannel = ns3::YansWifiChannelHelper::Default();
57 static ns3::WifiMacHelper wifiMac;
58 static ns3::MobilityHelper mobility;
60 simgrid::xbt::Extension<simgrid::kernel::routing::NetPoint, NetPointNs3> NetPointNs3::EXTENSION_ID;
62 static std::string transformIpv4Address(ns3::Ipv4Address from)
64 std::stringstream sstream;
69 NetPointNs3::NetPointNs3() : ns3_node_(ns3::CreateObject<ns3::Node>(0))
71 stack.Install(ns3_node_);
74 WifiZone::WifiZone(const std::string& name_, simgrid::s4u::Host* host_, ns3::Ptr<ns3::Node> ap_node_,
75 ns3::Ptr<ns3::YansWifiChannel> channel_, int mcs_, int nss_, int network_, int link_)
86 wifi_zones[name_] = this;
89 bool WifiZone::is_ap(ns3::Ptr<ns3::Node> node)
91 for (std::pair<std::string, WifiZone*> zone : wifi_zones)
92 if (zone.second->get_ap_node() == node)
97 WifiZone* WifiZone::by_name(const std::string& name)
101 zone = wifi_zones.at(name);
102 } catch (const std::out_of_range& oor) {
108 std::unordered_map<std::string, WifiZone*> WifiZone::wifi_zones;
110 static void initialize_ns3_wifi()
112 wifi.SetStandard(ns3::WIFI_PHY_STANDARD_80211n_5GHZ);
114 for (auto host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
115 const char* wifi_link = host->get_property("wifi_link");
116 const char* wifi_mcs = host->get_property("wifi_mcs");
117 const char* wifi_nss = host->get_property("wifi_nss");
120 new WifiZone(wifi_link, host, host->get_netpoint()->extension<NetPointNs3>()->ns3_node_, wifiChannel.Create(),
121 wifi_mcs ? atoi(wifi_mcs) : 3, wifi_nss ? atoi(wifi_nss) : 1, 0, 0);
129 static void clusterCreation_cb(simgrid::kernel::routing::ClusterCreationArgs const& cluster)
131 ns3::NodeContainer Nodes;
133 for (int const& i : *cluster.radicals) {
134 // Create private link
135 std::string host_id = cluster.prefix + std::to_string(i) + cluster.suffix;
136 auto* src = simgrid::s4u::Host::by_name(host_id)->get_netpoint();
137 auto* dst = simgrid::s4u::Engine::get_instance()->netpoint_by_name_or_null(cluster.router_id);
138 xbt_assert(dst != nullptr, "No router named %s", cluster.router_id.c_str());
140 ns3_add_direct_route(src, dst, cluster.bw, cluster.lat, cluster.id,
141 cluster.sharing_policy); // Any ns-3 route is symmetrical
143 // Also add the host to the list of hosts that will be connected to the backbone
144 Nodes.Add(src->extension<NetPointNs3>()->ns3_node_);
147 // Create link backbone
149 xbt_assert(Nodes.GetN() <= 65000, "Cluster with ns-3 is limited to 65000 nodes");
150 ns3::CsmaHelper csma;
151 csma.SetChannelAttribute("DataRate",
152 ns3::DataRateValue(ns3::DataRate(cluster.bb_bw * 8))); // ns-3 takes bps, but we provide Bps
153 csma.SetChannelAttribute("Delay", ns3::TimeValue(ns3::Seconds(cluster.bb_lat)));
154 ns3::NetDeviceContainer devices = csma.Install(Nodes);
155 XBT_DEBUG("Create CSMA");
157 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
158 XBT_DEBUG("Assign IP Addresses %s to CSMA.", addr.c_str());
159 ns3::Ipv4AddressHelper ipv4;
160 ipv4.SetBase(addr.c_str(), "255.255.0.0");
161 ipv4.Assign(devices);
163 if (number_of_links == 255) {
164 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
166 number_of_networks++;
172 static void routeCreation_cb(bool symmetrical, simgrid::kernel::routing::NetPoint* src,
173 simgrid::kernel::routing::NetPoint* dst, simgrid::kernel::routing::NetPoint* /*gw_src*/,
174 simgrid::kernel::routing::NetPoint* /*gw_dst*/,
175 std::vector<simgrid::kernel::resource::LinkImpl*> const& link_list)
177 if (link_list.size() == 1) {
178 auto const* link = static_cast<simgrid::kernel::resource::LinkNS3*>(link_list[0]);
180 XBT_DEBUG("Route from '%s' to '%s' with link '%s' %s %s", src->get_cname(), dst->get_cname(), link->get_cname(),
181 (link->get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI ? "(wifi)" : "(wired)"),
182 (symmetrical ? "(symmetrical)" : "(not symmetrical)"));
184 // XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
185 XBT_DEBUG("\tLink (%s) bw:%fbps lat:%fs", link->get_cname(), link->get_bandwidth(), link->get_latency());
187 ns3_add_direct_route(src, dst, link->get_bandwidth(), link->get_latency(), link->get_name(),
188 link->get_sharing_policy());
190 static bool warned_about_long_routes = false;
192 if (not warned_about_long_routes)
193 XBT_WARN("Ignoring a route between %s and %s of length %zu: Only routes of length 1 are considered with ns-3.\n"
194 "WARNING: You can ignore this warning if your hosts can still communicate when only considering routes "
196 "WARNING: Remove long routes to avoid this harmless message; subsequent long routes will be silently "
198 src->get_cname(), dst->get_cname(), link_list.size());
199 warned_about_long_routes = true;
206 void surf_network_model_init_NS3()
208 xbt_assert(surf_network_model == nullptr, "Cannot set the network model twice");
210 surf_network_model = new simgrid::kernel::resource::NetworkNS3Model();
213 static simgrid::config::Flag<std::string>
214 ns3_tcp_model("ns3/TcpModel", "The ns-3 tcp model can be: NewReno or Reno or Tahoe", "default");
215 static simgrid::config::Flag<std::string> ns3_seed(
217 "The random seed provided to ns-3. Either 'time' to seed with time(), blank to not set (default), or a number.", "",
218 [](std::string val) {
219 if (val.length() == 0)
221 if (strcasecmp(val.c_str(), "time") == 0) {
222 std::srand(time(NULL));
223 ns3::RngSeedManager::SetSeed(std::rand());
224 ns3::RngSeedManager::SetRun(std::rand());
226 int v = xbt_str_parse_int(
227 val.c_str(), "Invalid value for option ns3/seed. It must be either 'time', a number, or left empty.");
228 ns3::RngSeedManager::SetSeed(v);
229 ns3::RngSeedManager::SetRun(v);
237 NetworkNS3Model::NetworkNS3Model() : NetworkModel(Model::UpdateAlgo::FULL)
239 xbt_assert(not sg_link_energy_is_inited(),
240 "LinkEnergy plugin and ns-3 network models are not compatible. Are you looking for Ecofen, maybe?");
242 all_existing_models.push_back(this);
244 NetPointNs3::EXTENSION_ID = routing::NetPoint::extension_create<NetPointNs3>();
246 ns3::Config::SetDefault("ns3::TcpSocket::SegmentSize", ns3::UintegerValue(1000));
247 ns3::Config::SetDefault("ns3::TcpSocket::DelAckCount", ns3::UintegerValue(1));
248 ns3::Config::SetDefault("ns3::TcpSocketBase::Timestamp", ns3::BooleanValue(false));
250 auto TcpProtocol = ns3_tcp_model.get();
251 if (TcpProtocol == "default") {
254 } else if (TcpProtocol == "Reno" || TcpProtocol == "NewReno" || TcpProtocol == "Tahoe") {
255 XBT_INFO("Switching Tcp protocol to '%s'", TcpProtocol.c_str());
256 ns3::Config::SetDefault("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::Tcp" + TcpProtocol));
259 xbt_die("The ns3/TcpModel must be: NewReno or Reno or Tahoe");
262 routing::NetPoint::on_creation.connect([](routing::NetPoint& pt) {
263 pt.extension_set<NetPointNs3>(new NetPointNs3());
264 XBT_VERB("Declare SimGrid's %s within ns-3", pt.get_cname());
267 s4u::Engine::on_platform_created.connect([]() {
268 /* Create the ns3 topology based on routing strategy */
269 ns3::GlobalRouteManager::BuildGlobalRoutingDatabase();
270 ns3::GlobalRouteManager::InitializeRoutes();
272 routing::on_cluster_creation.connect(&clusterCreation_cb);
273 s4u::NetZone::on_route_creation.connect(&routeCreation_cb);
276 LinkImpl* NetworkNS3Model::create_link(const std::string& name, const std::vector<double>& bandwidths, double latency,
277 s4u::Link::SharingPolicy policy)
279 xbt_assert(bandwidths.size() == 1, "ns-3 links must use only 1 bandwidth.");
280 return new LinkNS3(this, name, bandwidths[0], latency, policy);
283 Action* NetworkNS3Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
285 xbt_assert(rate == -1,
286 "Communication over ns-3 links cannot specify a specific rate. Please use -1 as a value instead of %f.",
288 return new NetworkNS3Action(this, size, src, dst);
291 double NetworkNS3Model::next_occurring_event(double now)
293 double time_to_next_flow_completion = 0.0;
294 XBT_DEBUG("ns3_next_occurring_event");
296 //get the first relevant value from the running_actions list
298 // If there is no comms in NS-3, then we do not move it forward.
299 // We will synchronize NS-3 with SimGrid when starting a new communication.
300 // (see NetworkNS3Action::NetworkNS3Action() for more details on this point)
301 if (get_started_action_set()->empty() || now == 0.0)
304 XBT_DEBUG("doing a ns3 simulation for a duration of %f", now);
306 time_to_next_flow_completion = ns3::Simulator::Now().GetSeconds() - surf_get_clock();
307 // NS-3 stops as soon as a flow ends,
308 // but it does not process the other flows that may finish at the same (simulated) time.
309 // If another flow ends at the same time, time_to_next_flow_completion = 0
310 if(double_equals(time_to_next_flow_completion, 0, sg_surf_precision))
311 time_to_next_flow_completion = 0.0;
313 XBT_DEBUG("min : %f", now);
314 XBT_DEBUG("ns3 time : %f", ns3::Simulator::Now().GetSeconds());
315 XBT_DEBUG("surf time : %f", surf_get_clock());
316 XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
318 return time_to_next_flow_completion;
321 void NetworkNS3Model::update_actions_state(double now, double delta)
323 static std::vector<std::string> socket_to_destroy;
325 std::string ns3_socket;
326 for (const auto& elm : flow_from_sock) {
327 ns3_socket = elm.first;
328 SgFlow* sgFlow = elm.second;
329 NetworkNS3Action * action = sgFlow->action_;
330 XBT_DEBUG("Processing flow %p (socket %s, action %p)", sgFlow, ns3_socket.c_str(), action);
331 // Because NS3 stops as soon as a flow is finished, the other flows that ends at the same time may remains in an
332 // inconsistent state (i.e. remains_ == 0 but finished_ == false).
333 // However, SimGrid considers sometimes that an action with remains_ == 0 is finished.
334 // Thus, to avoid inconsistencies between SimGrid and NS3, set remains to 0 only when the flow is finished in NS3
335 int remains = action->get_cost() - sgFlow->sent_bytes_;
337 action->set_remains(remains);
339 if (TRACE_is_enabled() && action->get_state() == kernel::resource::Action::State::STARTED) {
340 double data_delta_sent = sgFlow->sent_bytes_ - action->last_sent_;
342 std::vector<LinkImpl*> route = std::vector<LinkImpl*>();
344 action->get_src().route_to(&action->get_dst(), route, nullptr);
345 for (auto const& link : route)
346 instr::resource_set_utilization("LINK", "bandwidth_used", link->get_cname(), action->get_category(),
347 (data_delta_sent) / delta, now - delta, delta);
349 action->last_sent_ = sgFlow->sent_bytes_;
352 if ((sgFlow->finished_) && (remains <= 0)) { // finished_ should not become true before remains gets to 0, but it sometimes does. Let's play safe, here.
353 socket_to_destroy.push_back(ns3_socket);
354 XBT_DEBUG("Destroy socket %s of action %p", ns3_socket.c_str(), action);
355 action->set_remains(0);
356 action->finish(Action::State::FINISHED);
358 XBT_DEBUG("Socket %s sent %u bytes out of %u (%u remaining)", ns3_socket.c_str(), sgFlow->sent_bytes_,
359 sgFlow->total_bytes_, sgFlow->remaining_);
363 while (not socket_to_destroy.empty()) {
364 ns3_socket = socket_to_destroy.back();
365 socket_to_destroy.pop_back();
366 SgFlow* flow = flow_from_sock.at(ns3_socket);
367 if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
368 XBT_DEBUG("Removing socket %s of action %p", ns3_socket.c_str(), flow->action_);
371 flow_from_sock.erase(ns3_socket);
372 sink_from_sock.erase(ns3_socket);
380 LinkNS3::LinkNS3(NetworkNS3Model* model, const std::string& name, double bandwidth, double latency,
381 s4u::Link::SharingPolicy policy)
382 : LinkImpl(model, name, nullptr), sharing_policy_(policy)
384 bandwidth_.peak = bandwidth;
385 latency_.peak = latency;
387 /* If wifi, create the wifizone now. If not, don't do anything: the links will be created in routeCreate_cb */
389 if (policy == simgrid::s4u::Link::SharingPolicy::WIFI) {
390 static bool wifi_init = false;
392 initialize_ns3_wifi();
396 ns3::NetDeviceContainer netA;
397 WifiZone* zone = WifiZone::by_name(name);
398 xbt_assert(zone != nullptr, "Link name '%s' does not match the 'wifi_link' property of a host.", name.c_str());
399 auto* netpoint_ns3 = zone->get_host()->get_netpoint()->extension<NetPointNs3>();
401 wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager", "ControlMode", ns3::StringValue("HtMcs0"), "DataMode",
402 ns3::StringValue("HtMcs" + std::to_string(zone->get_mcs())));
404 wifiPhy.SetChannel(zone->get_channel());
405 wifiPhy.Set("Antennas", ns3::UintegerValue(zone->get_nss()));
406 wifiPhy.Set("MaxSupportedTxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
407 wifiPhy.Set("MaxSupportedRxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
409 wifiMac.SetType("ns3::ApWifiMac",
410 "Ssid", ns3::SsidValue(name));
412 netA.Add(wifi.Install(wifiPhy, wifiMac, zone->get_ap_node()));
414 ns3::Ptr<ns3::ListPositionAllocator> positionAllocS = ns3::CreateObject<ns3::ListPositionAllocator>();
415 positionAllocS->Add(ns3::Vector(0, 0, 0));
416 mobility.SetPositionAllocator(positionAllocS);
417 mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
418 mobility.Install(zone->get_ap_node());
420 ns3::Ipv4AddressHelper address;
421 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
422 address.SetBase(addr.c_str(), "255.255.0.0");
423 XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
424 auto addresses = address.Assign(netA);
425 zone->set_network(number_of_networks);
426 zone->set_link(number_of_links);
428 netpoint_ns3->ipv4_address_ = transformIpv4Address(addresses.GetAddress(1));
430 if (number_of_links == 255) {
431 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
433 number_of_networks++;
438 s4u::Link::on_creation(*this->get_iface());
441 LinkNS3::~LinkNS3() = default;
443 void LinkNS3::apply_event(profile::Event*, double)
447 void LinkNS3::set_bandwidth_profile(profile::Profile*)
449 xbt_die("The ns-3 network model doesn't support bandwidth profiles");
451 void LinkNS3::set_latency_profile(profile::Profile*)
453 xbt_die("The ns-3 network model doesn't support latency profiles");
460 NetworkNS3Action::NetworkNS3Action(Model* model, double totalBytes, s4u::Host* src, s4u::Host* dst)
461 : NetworkAction(model, *src, *dst, totalBytes, false)
463 // ns-3 fails when src = dst, so avoid the problem by considering that communications are infinitely fast on the
464 // loopback that does not exists
466 static bool warned = false;
468 XBT_WARN("Sending from a host %s to itself is not supported by ns-3. Every such communication finishes "
469 "immediately upon startup.",
473 finish(Action::State::FINISHED);
477 // If there is no other started actions, we need to move NS-3 forward to be sync with SimGrid
478 if (model->get_started_action_set()->size()==1){
479 while(double_positive(surf_get_clock() - ns3::Simulator::Now().GetSeconds(), sg_surf_precision)){
480 XBT_DEBUG("Synchronizing NS-3 (time %f) with SimGrid (time %f)", ns3::Simulator::Now().GetSeconds(), surf_get_clock());
481 ns3_simulator(surf_get_clock() - ns3::Simulator::Now().GetSeconds());
485 static uint16_t port_number = 1;
487 ns3::Ptr<ns3::Node> src_node = src->get_netpoint()->extension<NetPointNs3>()->ns3_node_;
488 ns3::Ptr<ns3::Node> dst_node = dst->get_netpoint()->extension<NetPointNs3>()->ns3_node_;
490 std::string& addr = dst->get_netpoint()->extension<NetPointNs3>()->ipv4_address_;
491 xbt_assert(not addr.empty(), "Element %s is unknown to ns-3. Is it connected to any one-hop link?",
492 dst->get_netpoint()->get_cname());
494 ns3::PacketSinkHelper sink("ns3::TcpSocketFactory", ns3::InetSocketAddress(ns3::Ipv4Address::GetAny(), port_number));
495 ns3::ApplicationContainer apps = sink.Install(dst_node);
497 ns3::Ptr<ns3::Socket> sock = ns3::Socket::CreateSocket(src_node, ns3::TcpSocketFactory::GetTypeId());
499 XBT_DEBUG("Create socket %s for a flow of %.0f Bytes from %s to %s with Interface %s",
500 transform_socket_ptr(sock).c_str(), totalBytes, src->get_cname(), dst->get_cname(), addr.c_str());
502 flow_from_sock.insert({transform_socket_ptr(sock), new SgFlow(totalBytes, this)});
503 sink_from_sock.insert({transform_socket_ptr(sock), apps});
505 sock->Bind(ns3::InetSocketAddress(port_number));
506 ns3::Simulator::ScheduleNow(&start_flow, sock, addr.c_str(), port_number);
508 port_number = 1 + (port_number % UINT16_MAX);
509 if (port_number == 1)
510 XBT_WARN("Too many connections! Port number is saturated. Trying to use the oldest ports.");
512 s4u::Link::on_communicate(*this);
515 void NetworkNS3Action::suspend() {
519 void NetworkNS3Action::resume() {
523 std::list<LinkImpl*> NetworkNS3Action::get_links() const
527 void NetworkNS3Action::update_remains_lazy(double /*now*/)
532 } // namespace resource
533 } // namespace kernel
534 } // namespace simgrid
536 void ns3_simulator(double maxSeconds)
539 if (maxSeconds > 0.0) // If there is a maximum amount of time to run
540 id = ns3::Simulator::Schedule(ns3::Seconds(maxSeconds), &ns3::Simulator::Stop);
542 XBT_DEBUG("Start simulator for at most %fs (current time: %f)", maxSeconds, surf_get_clock());
543 ns3::Simulator::Run ();
544 XBT_DEBUG("Simulator stopped at %fs", ns3::Simulator::Now().GetSeconds());
550 void ns3_add_direct_route(simgrid::kernel::routing::NetPoint* src, simgrid::kernel::routing::NetPoint* dst, double bw,
551 double lat, const std::string& link_name, simgrid::s4u::Link::SharingPolicy policy)
553 ns3::Ipv4AddressHelper address;
554 ns3::NetDeviceContainer netA;
557 auto* host_src = src->extension<NetPointNs3>();
558 auto* host_dst = dst->extension<NetPointNs3>();
560 xbt_assert(host_src != nullptr, "Network element %s does not seem to be ns-3-ready", src->get_cname());
561 xbt_assert(host_dst != nullptr, "Network element %s does not seem to be ns-3-ready", dst->get_cname());
563 if (policy == simgrid::s4u::Link::SharingPolicy::WIFI) {
564 auto a = host_src->ns3_node_;
565 auto b = host_dst->ns3_node_;
566 xbt_assert(WifiZone::is_ap(a) != WifiZone::is_ap(b),
567 "A wifi route can only exist between an access point node and a station node.");
569 ns3::Ptr<ns3::Node> apNode = WifiZone::is_ap(a) ? a : b;
570 ns3::Ptr<ns3::Node> staNode = apNode == a ? b : a;
572 WifiZone* zone = WifiZone::by_name(link_name);
574 wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager", "ControlMode", ns3::StringValue("HtMcs0"), "DataMode",
575 ns3::StringValue("HtMcs" + std::to_string(zone->get_mcs())));
577 wifiPhy.SetChannel(zone->get_channel());
578 wifiPhy.Set("Antennas", ns3::UintegerValue(zone->get_nss()));
579 wifiPhy.Set("MaxSupportedTxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
580 wifiPhy.Set("MaxSupportedRxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
582 wifiMac.SetType ("ns3::StaWifiMac",
583 "Ssid", ns3::SsidValue(link_name),
584 "ActiveProbing", ns3::BooleanValue(false));
586 netA.Add(wifi.Install(wifiPhy, wifiMac, staNode));
588 ns3::Config::Set("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/ChannelWidth", ns3::UintegerValue(40));
590 simgrid::kernel::routing::NetPoint* sta_netpoint = WifiZone::is_ap(host_src->ns3_node_) ? dst : src;
591 const char* wifi_distance = simgrid::s4u::Host::by_name(sta_netpoint->get_name())->get_property("wifi_distance");
592 ns3::Ptr<ns3::ListPositionAllocator> positionAllocS = ns3::CreateObject<ns3::ListPositionAllocator>();
593 positionAllocS->Add(ns3::Vector(wifi_distance ? atof(wifi_distance) : 10.0, 0, 0));
594 mobility.SetPositionAllocator(positionAllocS);
595 mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
596 mobility.Install(staNode);
598 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", zone->get_network(), zone->get_link());
599 address.SetBase(addr.c_str(), "255.255.0.0", ("0.0.0." + std::to_string(zone->get_n_sta_nodes() + 2)).c_str());
600 zone->add_sta_node();
601 XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
602 auto addresses = address.Assign(netA);
603 host_dst->ipv4_address_ = transformIpv4Address(addresses.GetAddress(1));
605 ns3::PointToPointHelper pointToPoint;
607 XBT_DEBUG("\tAdd PTP from %s to %s bw:'%f Bps' lat:'%fs'", src->get_cname(), dst->get_cname(), bw, lat);
608 pointToPoint.SetDeviceAttribute("DataRate",
609 ns3::DataRateValue(ns3::DataRate(bw * 8))); // ns-3 takes bps, but we provide Bps
610 pointToPoint.SetChannelAttribute("Delay", ns3::TimeValue(ns3::Seconds(lat)));
612 netA.Add(pointToPoint.Install(host_src->ns3_node_, host_dst->ns3_node_));
614 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
615 address.SetBase(addr.c_str(), "255.255.0.0");
616 XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
617 auto addresses = address.Assign(netA);
619 host_src->ipv4_address_ = transformIpv4Address(addresses.GetAddress(0));
620 host_dst->ipv4_address_ = transformIpv4Address(addresses.GetAddress(1));
622 if (number_of_links == 255) {
623 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
625 number_of_networks++;