1 /* Copyright (c) 2007-2018. 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>
21 #include "network_ns3.hpp"
22 #include "ns3/ns3_simulator.hpp"
24 #include "simgrid/kernel/routing/NetPoint.hpp"
25 #include "simgrid/plugins/energy.h"
26 #include "simgrid/s4u/Engine.hpp"
27 #include "simgrid/s4u/NetZone.hpp"
28 #include "src/instr/instr_private.hpp" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
29 #include "src/surf/surf_interface.hpp"
30 #include "src/surf/xml/platf_private.hpp"
31 #include "surf/surf.hpp"
33 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ns3, surf, "Logging specific to the SURF network NS3 module");
35 std::vector<std::string> IPV4addr;
41 extern std::map<std::string, SgFlow*> flowFromSock;
43 static ns3::InternetStackHelper stack;
44 static ns3::NodeContainer nodes;
45 static ns3::NodeContainer Cluster_nodes;
46 static ns3::Ipv4InterfaceContainer interfaces;
48 static int number_of_nodes = 0;
49 static int number_of_clusters_nodes = 0;
50 static int number_of_links = 1;
51 static int number_of_networks = 1;
53 simgrid::xbt::Extension<simgrid::kernel::routing::NetPoint, NetPointNs3> NetPointNs3::EXTENSION_ID;
55 NetPointNs3::NetPointNs3()
57 ns3Node_ = ns3::CreateObject<ns3::Node>(0);
58 stack.Install(ns3Node_);
60 node_num = number_of_nodes++;
67 static void clusterCreation_cb(simgrid::kernel::routing::ClusterCreationArgs* cluster)
69 for (int const& i : *cluster->radicals) {
70 // Routers don't create a router on the other end of the private link by themselves.
71 // We just need this router to be given an ID so we create a temporary NetPointNS3 so that it gets one
72 NetPointNs3* host_dst = new NetPointNs3();
74 // Create private link
75 std::string host_id = cluster->prefix + std::to_string(i) + cluster->suffix;
76 NetPointNs3* host_src = sg_host_by_name(host_id.c_str())->pimpl_netpoint->extension<NetPointNs3>();
77 xbt_assert(host_src, "Cannot find a NS3 host of name %s", host_id.c_str());
79 // Any NS3 route is symmetrical
80 ns3_add_link(host_src, host_dst, cluster->bw, cluster->lat);
85 //Create link backbone
86 ns3_add_cluster(cluster->id.c_str(), cluster->bb_bw, cluster->bb_lat);
89 static void routeCreation_cb(bool symmetrical, simgrid::kernel::routing::NetPoint* src,
90 simgrid::kernel::routing::NetPoint* dst, simgrid::kernel::routing::NetPoint* gw_src,
91 simgrid::kernel::routing::NetPoint* gw_dst,
92 std::vector<simgrid::surf::LinkImpl*>& link_list)
94 if (link_list.size() == 1) {
95 simgrid::surf::LinkNS3* link = static_cast<simgrid::surf::LinkNS3*>(link_list[0]);
97 XBT_DEBUG("Route from '%s' to '%s' with link '%s' %s", src->get_cname(), dst->get_cname(), link->get_cname(),
98 (symmetrical ? "(symmetrical)" : "(not symmetrical)"));
100 // XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
101 XBT_DEBUG("\tLink (%s) bw:%fbps lat:%fs", link->get_cname(), link->bandwidth(), link->latency());
104 NetPointNs3* host_src = src->extension<NetPointNs3>();
105 NetPointNs3* host_dst = dst->extension<NetPointNs3>();
107 xbt_assert(host_src != nullptr, "Network element %s does not seem to be NS3-ready", src->get_cname());
108 xbt_assert(host_dst != nullptr, "Network element %s does not seem to be NS3-ready", dst->get_cname());
110 ns3_add_link(host_src, host_dst, link->bandwidth(), link->latency());
112 static bool warned_about_long_routes = false;
114 if (not warned_about_long_routes)
115 XBT_WARN("Ignoring a route between %s and %s of length %zu: Only routes of length 1 are considered with NS3.\n"
116 "WARNING: You can ignore this warning if your hosts can still communicate when only considering routes "
118 "WARNING: Remove long routes to avoid this harmless message; subsequent long routes will be silently "
120 src->get_cname(), dst->get_cname(), link_list.size());
121 warned_about_long_routes = true;
125 /* Create the ns3 topology based on routing strategy */
126 static void postparse_cb()
128 IPV4addr.shrink_to_fit();
130 ns3::GlobalRouteManager::BuildGlobalRoutingDatabase();
131 ns3::GlobalRouteManager::InitializeRoutes();
137 void surf_network_model_init_NS3()
139 if (surf_network_model)
142 surf_network_model = new simgrid::surf::NetworkNS3Model();
143 all_existing_models->push_back(surf_network_model);
146 static simgrid::config::Flag<std::string>
147 ns3_tcp_model("ns3/TcpModel", "The ns3 tcp model can be : NewReno or Reno or Tahoe", "default");
152 NetworkNS3Model::NetworkNS3Model() : NetworkModel(Model::UpdateAlgo::Full)
154 xbt_assert(not sg_link_energy_is_inited(),
155 "LinkEnergy plugin and NS3 network models are not compatible. Are you looking for Ecofen, maybe?");
157 NetPointNs3::EXTENSION_ID = simgrid::kernel::routing::NetPoint::extension_create<NetPointNs3>();
159 ns3_initialize(ns3_tcp_model.get().c_str());
161 simgrid::kernel::routing::NetPoint::onCreation.connect([](simgrid::kernel::routing::NetPoint* pt) {
162 pt->extension_set<NetPointNs3>(new NetPointNs3());
163 XBT_VERB("SimGrid's %s is known as node %d within NS3", pt->get_cname(), pt->extension<NetPointNs3>()->node_num);
165 simgrid::surf::on_cluster.connect(&clusterCreation_cb);
167 simgrid::s4u::onPlatformCreated.connect(&postparse_cb);
168 simgrid::s4u::NetZone::onRouteCreation.connect(&routeCreation_cb);
171 NetworkNS3Model::~NetworkNS3Model() {
175 LinkImpl* NetworkNS3Model::createLink(const std::string& name, double bandwidth, double latency,
176 e_surf_link_sharing_policy_t policy)
178 return new LinkNS3(this, name, bandwidth, latency);
181 kernel::resource::Action* NetworkNS3Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
183 return new NetworkNS3Action(this, size, src, dst);
186 double NetworkNS3Model::next_occuring_event(double now)
188 double time_to_next_flow_completion;
189 XBT_DEBUG("ns3_next_occuring_event");
191 //get the first relevant value from the running_actions list
192 if (not get_running_action_set()->size() || now == 0.0)
197 time_to_next_flow_completion = ns3::Simulator::Now().GetSeconds() - surf_get_clock();
198 } while(double_equals(time_to_next_flow_completion, 0, sg_surf_precision));
200 XBT_DEBUG("min : %f", now);
201 XBT_DEBUG("ns3 time : %f", ns3::Simulator::Now().GetSeconds());
202 XBT_DEBUG("surf time : %f", surf_get_clock());
203 XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
205 return time_to_next_flow_completion;
208 void NetworkNS3Model::update_actions_state(double now, double delta)
210 static std::vector<std::string> socket_to_destroy;
212 /* If there are no running flows, advance the NS3 simulator and return */
213 if (get_running_action_set()->empty()) {
215 while(double_positive(now - ns3::Simulator::Now().GetSeconds(), sg_surf_precision))
216 ns3_simulator(now-ns3::Simulator::Now().GetSeconds());
221 std::string ns3Socket;
222 for (auto elm : flowFromSock) {
223 ns3Socket = elm.first;
224 SgFlow* sgFlow = elm.second;
225 NetworkNS3Action * action = sgFlow->action_;
226 XBT_DEBUG("Processing socket %p (action %p)",sgFlow,action);
227 action->set_remains(action->get_cost() - sgFlow->sentBytes_);
229 if (TRACE_is_enabled() && action->get_state() == kernel::resource::Action::State::running) {
230 double data_delta_sent = sgFlow->sentBytes_ - action->lastSent_;
232 std::vector<LinkImpl*> route = std::vector<LinkImpl*>();
234 action->src_->routeTo(action->dst_, route, nullptr);
235 for (auto const& link : route)
236 TRACE_surf_link_set_utilization(link->get_cname(), action->get_category(), (data_delta_sent) / delta,
239 action->lastSent_ = sgFlow->sentBytes_;
242 if(sgFlow->finished_){
243 socket_to_destroy.push_back(ns3Socket);
244 XBT_DEBUG("Destroy socket %p of action %p", ns3Socket.c_str(), action);
245 action->finish(kernel::resource::Action::State::done);
247 XBT_DEBUG("Socket %p sent %u bytes out of %u (%u remaining)", ns3Socket.c_str(), sgFlow->sentBytes_,
248 sgFlow->totalBytes_, sgFlow->remaining_);
252 while (not socket_to_destroy.empty()) {
253 ns3Socket = socket_to_destroy.back();
254 socket_to_destroy.pop_back();
255 SgFlow* flow = flowFromSock.at(ns3Socket);
256 if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
257 XBT_DEBUG("Removing socket %p of action %p", ns3Socket.c_str(), flow->action_);
260 flowFromSock.erase(ns3Socket);
268 LinkNS3::LinkNS3(NetworkNS3Model* model, const std::string& name, double bandwidth, double latency)
269 : LinkImpl(model, name, nullptr)
271 bandwidth_.peak = bandwidth;
272 latency_.peak = latency;
274 s4u::Link::onCreation(this->piface_);
277 LinkNS3::~LinkNS3() = default;
279 void LinkNS3::apply_event(tmgr_trace_event_t event, double value)
283 void LinkNS3::setBandwidthTrace(tmgr_trace_t trace) {
284 xbt_die("The NS3 network model doesn't support bandwidth traces");
286 void LinkNS3::setLatencyTrace(tmgr_trace_t trace) {
287 xbt_die("The NS3 network model doesn't support latency traces");
294 NetworkNS3Action::NetworkNS3Action(kernel::resource::Model* model, double totalBytes, s4u::Host* src, s4u::Host* dst)
295 : NetworkAction(model, totalBytes, false)
297 XBT_DEBUG("Communicate from %s to %s", src->get_cname(), dst->get_cname());
301 static int port_number = 1025; // Port number is limited from 1025 to 65 000
303 unsigned int node1 = src->pimpl_netpoint->extension<NetPointNs3>()->node_num;
304 unsigned int node2 = dst->pimpl_netpoint->extension<NetPointNs3>()->node_num;
306 ns3::Ptr<ns3::Node> src_node = src->pimpl_netpoint->extension<NetPointNs3>()->ns3Node_;
307 ns3::Ptr<ns3::Node> dst_node = dst->pimpl_netpoint->extension<NetPointNs3>()->ns3Node_;
309 xbt_assert(node2 < IPV4addr.size(), "Element %s is unknown to NS3. Is it connected to any one-hop link?",
310 dst->pimpl_netpoint->get_cname());
311 std::string& addr = IPV4addr[node2];
312 xbt_assert(not addr.empty(), "Element %s is unknown to NS3. Is it connected to any one-hop link?",
313 dst->pimpl_netpoint->get_cname());
315 XBT_DEBUG("ns3: Create flow of %.0f Bytes from %u to %u with Interface %s", totalBytes, node1, node2, addr.c_str());
316 ns3::PacketSinkHelper sink("ns3::TcpSocketFactory", ns3::InetSocketAddress(ns3::Ipv4Address::GetAny(), port_number));
317 sink.Install(dst_node);
319 ns3::Ptr<ns3::Socket> sock = ns3::Socket::CreateSocket(src_node, ns3::TcpSocketFactory::GetTypeId());
321 flowFromSock.insert({transformSocketPtr(sock), new SgFlow(totalBytes, this)});
323 sock->Bind(ns3::InetSocketAddress(port_number));
325 ns3::Simulator::ScheduleNow(&StartFlow, sock, addr.c_str(), port_number);
328 xbt_assert(port_number <= 65000, "Too many connections! Port number is saturated.");
330 s4u::Link::onCommunicate(this, src, dst);
333 void NetworkNS3Action::suspend() {
337 void NetworkNS3Action::resume() {
341 std::list<LinkImpl*> NetworkNS3Action::links()
345 void NetworkNS3Action::update_remains_lazy(double /*now*/)
353 void ns3_simulator(double maxSeconds)
355 if (maxSeconds > 0.0) // If there is a maximum amount of time to run
356 ns3::Simulator::Stop(ns3::Seconds(maxSeconds));
357 XBT_DEBUG("Start simulator for at most %fs (current time: %f)", maxSeconds, surf_get_clock());
358 ns3::Simulator::Run ();
362 // initialize the NS3 interface and environment
363 void ns3_initialize(std::string TcpProtocol)
370 ns3::Config::SetDefault ("ns3::TcpSocket::SegmentSize", ns3::UintegerValue (1000));
371 ns3::Config::SetDefault ("ns3::TcpSocket::DelAckCount", ns3::UintegerValue (1));
372 ns3::Config::SetDefault ("ns3::TcpSocketBase::Timestamp", ns3::BooleanValue (false));
374 if (TcpProtocol == "default") {
377 } else if (TcpProtocol == "Reno") {
378 XBT_INFO("Switching Tcp protocol to '%s'", TcpProtocol.c_str());
379 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpReno"));
381 } else if (TcpProtocol == "NewReno") {
382 XBT_INFO("Switching Tcp protocol to '%s'", TcpProtocol.c_str());
383 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpNewReno"));
385 } else if (TcpProtocol == "Tahoe") {
386 XBT_INFO("Switching Tcp protocol to '%s'", TcpProtocol.c_str());
387 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpTahoe"));
390 xbt_die("The ns3/TcpModel must be: NewReno or Reno or Tahoe");
394 void ns3_add_cluster(const char* id, double bw, double lat) {
395 ns3::NodeContainer Nodes;
397 for (unsigned int i = number_of_clusters_nodes; i < Cluster_nodes.GetN(); i++) {
398 Nodes.Add(Cluster_nodes.Get(i));
399 XBT_DEBUG("Add node %u to cluster", i);
401 number_of_clusters_nodes = Cluster_nodes.GetN();
403 XBT_DEBUG("Add router %u to cluster", nodes.GetN() - Nodes.GetN() - 1);
404 Nodes.Add(nodes.Get(nodes.GetN()-Nodes.GetN()-1));
406 xbt_assert(Nodes.GetN() <= 65000, "Cluster with NS3 is limited to 65000 nodes");
407 ns3::CsmaHelper csma;
408 csma.SetChannelAttribute("DataRate", ns3::DataRateValue(ns3::DataRate(bw * 8))); // NS3 takes bps, but we provide Bps
409 csma.SetChannelAttribute("Delay", ns3::TimeValue(ns3::Seconds(lat)));
410 ns3::NetDeviceContainer devices = csma.Install(Nodes);
411 XBT_DEBUG("Create CSMA");
413 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
414 XBT_DEBUG("Assign IP Addresses %s to CSMA.", addr.c_str());
415 ns3::Ipv4AddressHelper ipv4;
416 ipv4.SetBase(addr.c_str(), "255.255.0.0");
417 interfaces.Add(ipv4.Assign (devices));
419 if(number_of_links == 255){
420 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
422 number_of_networks++;
426 XBT_DEBUG("Number of nodes in Cluster_nodes: %u", Cluster_nodes.GetN());
429 static std::string transformIpv4Address(ns3::Ipv4Address from)
431 std::stringstream sstream;
433 return sstream.str();
436 void ns3_add_link(NetPointNs3* src, NetPointNs3* dst, double bw, double lat) {
437 ns3::PointToPointHelper pointToPoint;
439 ns3::Ipv4AddressHelper address;
441 int srcNum = src->node_num;
442 int dstNum = dst->node_num;
444 ns3::Ptr<ns3::Node> a = src->ns3Node_;
445 ns3::Ptr<ns3::Node> b = dst->ns3Node_;
447 XBT_DEBUG("\tAdd PTP from %d to %d bw:'%f Bps' lat:'%fs'", srcNum, dstNum, bw, lat);
448 pointToPoint.SetDeviceAttribute("DataRate",
449 ns3::DataRateValue(ns3::DataRate(bw * 8))); // NS3 takes bps, but we provide Bps
450 pointToPoint.SetChannelAttribute("Delay", ns3::TimeValue(ns3::Seconds(lat)));
452 ns3::NetDeviceContainer netA;
453 netA.Add(pointToPoint.Install (a, b));
455 std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
456 address.SetBase(addr.c_str(), "255.255.0.0");
457 XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
458 interfaces.Add(address.Assign (netA));
460 if (IPV4addr.size() <= (unsigned)srcNum)
461 IPV4addr.resize(srcNum + 1);
462 IPV4addr[srcNum] = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 2));
464 if (IPV4addr.size() <= (unsigned)dstNum)
465 IPV4addr.resize(dstNum + 1);
466 IPV4addr[dstNum] = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 1));
468 if (number_of_links == 255){
469 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
471 number_of_networks++;