1 /* Copyright (c) 2007-2017. 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. */
6 #include <unordered_set>
8 #include "xbt/config.hpp"
10 #include "ns3/core-module.h"
13 #include "ns3/ns3_simulator.h"
14 #include "network_ns3.hpp"
16 #include "src/instr/instr_private.h" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
17 #include "src/kernel/routing/NetPoint.hpp"
19 #include "simgrid/s4u/Engine.hpp"
20 #include "simgrid/s4u/NetZone.hpp"
22 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ns3, surf, "Logging specific to the SURF network NS3 module");
24 std::vector<char*> IPV4addr;
30 extern xbt_dict_t flowFromSock;
32 static ns3::InternetStackHelper stack;
33 static ns3::NodeContainer nodes;
34 static ns3::NodeContainer Cluster_nodes;
35 static ns3::Ipv4InterfaceContainer interfaces;
37 static int number_of_nodes = 0;
38 static int number_of_clusters_nodes = 0;
39 static int number_of_links = 1;
40 static int number_of_networks = 1;
41 static int port_number = 1025; //Port number is limited from 1025 to 65 000
43 simgrid::xbt::Extension<simgrid::kernel::routing::NetPoint, NetPointNs3> NetPointNs3::EXTENSION_ID;
45 NetPointNs3::NetPointNs3()
47 ns3::Ptr<ns3::Node> node = ns3::CreateObject<ns3::Node>(0);
50 node_num = number_of_nodes++;
57 static void clusterCreation_cb(sg_platf_cluster_cbarg_t cluster)
59 char* lat = bprintf("%fs", cluster->lat);
60 char* bw = bprintf("%fBps", cluster->bw);
62 for (int i : *cluster->radicals) {
63 // Routers don't create a router on the other end of the private link by themselves.
64 // We just need this router to be given an ID so we create a temporary NetPointNS3 so that it gets one
65 NetPointNs3* host_dst = new NetPointNs3();
67 // Create private link
68 char* host_id = bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
69 NetPointNs3* host_src = sg_host_by_name(host_id)->pimpl_netpoint->extension<NetPointNs3>();
70 xbt_assert(host_src, "Cannot find a NS3 host of name %s", host_id);
72 ns3_add_link(host_src, host_dst, bw, lat);
80 //Create link backbone
81 lat = bprintf("%fs", cluster->bb_lat);
82 bw = bprintf("%fBps", cluster->bb_bw);
83 ns3_add_cluster(cluster->id, bw, lat);
88 static void routeCreation_cb(bool symmetrical, simgrid::kernel::routing::NetPoint* src,
89 simgrid::kernel::routing::NetPoint* dst, simgrid::kernel::routing::NetPoint* gw_src,
90 simgrid::kernel::routing::NetPoint* gw_dst,
91 std::vector<simgrid::surf::LinkImpl*>* link_list)
93 if (link_list->size() == 1) {
94 simgrid::surf::LinkNS3* link = static_cast<simgrid::surf::LinkNS3*>(link_list->at(0));
96 XBT_DEBUG("Route from '%s' to '%s' with link '%s' %s", src->cname(), dst->cname(), link->cname(),
97 (symmetrical ? "(symmetrical)" : "(not symmetrical)"));
98 char* link_bdw = bprintf("%fBps", link->bandwidth());
99 char* link_lat = bprintf("%fs", link->latency());
101 // XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
102 XBT_DEBUG("\tLink (%s) bdw:%s lat:%s", link->cname(), link_bdw, link_lat);
105 NetPointNs3* host_src = src->extension<NetPointNs3>();
106 NetPointNs3* host_dst = dst->extension<NetPointNs3>();
108 xbt_assert(host_src != nullptr, "Network element %s does not seem to be NS3-ready", src->cname());
109 xbt_assert(host_dst != nullptr, "Network element %s does not seem to be NS3-ready", dst->cname());
111 ns3_add_link(host_src, host_dst, link_bdw, link_lat);
113 ns3_add_link(host_dst, host_src, link_bdw, link_lat);
118 static bool warned_about_long_routes = false;
120 if (not warned_about_long_routes)
121 XBT_WARN("Ignoring a route between %s and %s of length %zu: Only routes of length 1 are considered with NS3.\n"
122 "WARNING: You can ignore this warning if your hosts can still communicate when only considering routes "
124 "WARNING: Remove long routes to avoid this harmless message; subsequent long routes will be silently "
126 src->cname(), dst->cname(), link_list->size());
127 warned_about_long_routes = true;
131 /* Create the ns3 topology based on routing strategy */
132 static void postparse_cb()
134 IPV4addr.shrink_to_fit();
136 ns3::GlobalRouteManager::BuildGlobalRoutingDatabase();
137 ns3::GlobalRouteManager::InitializeRoutes();
143 void surf_network_model_init_NS3()
145 if (surf_network_model)
148 surf_network_model = new simgrid::surf::NetworkNS3Model();
149 all_existing_models->push_back(surf_network_model);
152 static simgrid::config::Flag<std::string> ns3_tcp_model("ns3/TcpModel",
153 "The ns3 tcp model can be : NewReno or Reno or Tahoe",
159 NetworkNS3Model::NetworkNS3Model() : NetworkModel() {
160 NetPointNs3::EXTENSION_ID = simgrid::kernel::routing::NetPoint::extension_create<NetPointNs3>();
162 ns3_initialize(ns3_tcp_model.get().c_str());
164 simgrid::kernel::routing::NetPoint::onCreation.connect([](simgrid::kernel::routing::NetPoint* pt) {
165 pt->extension_set<NetPointNs3>(new NetPointNs3());
166 XBT_VERB("SimGrid's %s is node %d within NS3", pt->cname(), pt->extension<NetPointNs3>()->node_num);
168 simgrid::surf::on_cluster.connect(&clusterCreation_cb);
169 simgrid::s4u::onPlatformCreated.connect(&postparse_cb);
170 simgrid::s4u::NetZone::onRouteCreation.connect(&routeCreation_cb);
172 LogComponentEnable("UdpEchoClientApplication", ns3::LOG_LEVEL_INFO);
173 LogComponentEnable("UdpEchoServerApplication", ns3::LOG_LEVEL_INFO);
176 NetworkNS3Model::~NetworkNS3Model() {
177 for (auto addr : IPV4addr)
180 xbt_dict_free(&flowFromSock);
183 LinkImpl* NetworkNS3Model::createLink(const char* name, double bandwidth, double latency,
184 e_surf_link_sharing_policy_t policy)
186 return new LinkNS3(this, name, bandwidth, latency);
189 Action* NetworkNS3Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
191 return new NetworkNS3Action(this, size, src, dst);
194 double NetworkNS3Model::nextOccuringEvent(double now)
196 double time_to_next_flow_completion;
197 XBT_DEBUG("ns3_next_occuring_event");
199 //get the first relevant value from the running_actions list
200 if (not getRunningActionSet()->size() || now == 0.0)
205 time_to_next_flow_completion = ns3::Simulator::Now().GetSeconds() - surf_get_clock();
206 } while(double_equals(time_to_next_flow_completion, 0, sg_surf_precision));
208 XBT_DEBUG("min : %f", now);
209 XBT_DEBUG("ns3 time : %f", ns3::Simulator::Now().GetSeconds());
210 XBT_DEBUG("surf time : %f", surf_get_clock());
211 XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
213 return time_to_next_flow_completion;
216 void NetworkNS3Model::updateActionsState(double now, double delta)
218 static xbt_dynar_t socket_to_destroy = xbt_dynar_new(sizeof(char*),nullptr);
220 /* If there are no running flows, advance the NS3 simulator and return */
221 if (getRunningActionSet()->empty()) {
223 while(double_positive(now - ns3::Simulator::Now().GetSeconds(), sg_surf_precision))
224 ns3_simulator(now-ns3::Simulator::Now().GetSeconds());
229 xbt_dict_cursor_t cursor = nullptr;
232 xbt_dict_foreach(flowFromSock,cursor,ns3Socket,sgFlow){
233 NetworkNS3Action * action = sgFlow->action_;
234 XBT_DEBUG("Processing socket %p (action %p)",sgFlow,action);
235 action->setRemains(action->getCost() - sgFlow->sentBytes_);
237 if (TRACE_is_enabled() &&
238 action->getState() == Action::State::running){
239 double data_delta_sent = sgFlow->sentBytes_ - action->lastSent_;
241 std::vector<LinkImpl*> route = std::vector<LinkImpl*>();
243 action->src_->routeTo(action->dst_, &route, nullptr);
244 for (auto link : route)
245 TRACE_surf_link_set_utilization(link->cname(), action->getCategory(), (data_delta_sent) / delta, now - delta,
248 action->lastSent_ = sgFlow->sentBytes_;
251 if(sgFlow->finished_){
252 xbt_dynar_push(socket_to_destroy,&ns3Socket);
253 XBT_DEBUG("Destroy socket %p of action %p", ns3Socket, action);
255 action->setState(Action::State::done);
259 while (not xbt_dynar_is_empty(socket_to_destroy)) {
260 xbt_dynar_pop(socket_to_destroy,&ns3Socket);
262 if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
263 SgFlow *flow = (SgFlow*)xbt_dict_get (flowFromSock, ns3Socket);
264 XBT_DEBUG ("Removing socket %p of action %p", ns3Socket, flow->action_);
266 xbt_dict_remove(flowFromSock, ns3Socket);
274 LinkNS3::LinkNS3(NetworkNS3Model* model, const char* name, double bandwidth, double latency)
275 : LinkImpl(model, name, nullptr)
277 bandwidth_.peak = bandwidth;
278 latency_.peak = latency;
280 s4u::Link::onCreation(this->piface_);
283 LinkNS3::~LinkNS3() = default;
285 void LinkNS3::apply_event(tmgr_trace_event_t event, double value)
289 void LinkNS3::setBandwidthTrace(tmgr_trace_t trace) {
290 xbt_die("The NS3 network model doesn't support bandwidth traces");
292 void LinkNS3::setLatencyTrace(tmgr_trace_t trace) {
293 xbt_die("The NS3 network model doesn't support latency traces");
300 NetworkNS3Action::NetworkNS3Action(Model* model, double size, s4u::Host* src, s4u::Host* dst)
301 : NetworkAction(model, size, false)
303 XBT_DEBUG("Communicate from %s to %s", src->cname(), dst->cname());
307 ns3_create_flow(src, dst, surf_get_clock(), size, this);
309 s4u::Link::onCommunicate(this, src, dst);
312 void NetworkNS3Action::suspend() {
316 void NetworkNS3Action::resume() {
320 std::list<LinkImpl*> NetworkNS3Action::links()
326 /* Test whether a flow is suspended */
327 bool NetworkNS3Action::isSuspended()
332 int NetworkNS3Action::unref()
336 if (action_hook.is_linked())
337 stateSet_->erase(stateSet_->iterator_to(*this));
338 XBT_DEBUG ("Removing action %p", this);
348 void ns3_simulator(double maxSeconds)
350 if (maxSeconds > 0.0) // If there is a maximum amount of time to run
351 ns3::Simulator::Stop(ns3::Seconds(maxSeconds));
352 XBT_DEBUG("Start simulator for at most %fs (current time: %f)", maxSeconds, surf_get_clock());
353 ns3::Simulator::Run ();
356 void ns3_create_flow(simgrid::s4u::Host* src, simgrid::s4u::Host* dst, double startTime, u_int32_t TotalBytes,
357 simgrid::surf::NetworkNS3Action* action)
359 unsigned int node1 = src->pimpl_netpoint->extension<NetPointNs3>()->node_num;
360 unsigned int node2 = dst->pimpl_netpoint->extension<NetPointNs3>()->node_num;
362 ns3::Ptr<ns3::Node> src_node = nodes.Get(node1);
363 ns3::Ptr<ns3::Node> dst_node = nodes.Get(node2);
365 xbt_assert(node2 < IPV4addr.size(), "Element %s is unknown to NS3. Is it connected to any one-hop link?",
366 dst->pimpl_netpoint->cname());
367 char* addr = IPV4addr.at(node2);
368 xbt_assert(addr != nullptr, "Element %s is unknown to NS3. Is it connected to any one-hop link?",
369 dst->pimpl_netpoint->cname());
371 XBT_DEBUG("ns3_create_flow %d Bytes from %d to %d with Interface %s",TotalBytes, node1, node2,addr);
372 ns3::PacketSinkHelper sink("ns3::TcpSocketFactory", ns3::InetSocketAddress (ns3::Ipv4Address::GetAny(), port_number));
373 sink.Install (dst_node);
375 ns3::Ptr<ns3::Socket> sock = ns3::Socket::CreateSocket (src_node, ns3::TcpSocketFactory::GetTypeId());
377 xbt_dict_set(flowFromSock, transformSocketPtr(sock), new SgFlow(TotalBytes, action), nullptr);
379 sock->Bind(ns3::InetSocketAddress(port_number));
380 XBT_DEBUG("Create flow starting to %fs + %fs = %fs",
381 startTime-ns3::Simulator::Now().GetSeconds(), ns3::Simulator::Now().GetSeconds(), startTime);
383 ns3::Simulator::Schedule (ns3::Seconds(startTime-ns3::Simulator::Now().GetSeconds()),
384 &StartFlow, sock, addr, port_number);
387 xbt_assert(port_number <= 65000, "Too many connections! Port number is saturated.");
390 // initialize the NS3 interface and environment
391 void ns3_initialize(const char* TcpProtocol){
397 ns3::Config::SetDefault ("ns3::TcpSocket::SegmentSize", ns3::UintegerValue (1024)); // 1024-byte packet for easier reading
398 ns3::Config::SetDefault ("ns3::TcpSocket::DelAckCount", ns3::UintegerValue (1));
400 if (not strcmp(TcpProtocol, "default"))
403 if (not strcmp(TcpProtocol, "Reno")) {
404 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
405 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpReno"));
408 if (not strcmp(TcpProtocol, "NewReno")) {
409 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
410 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpNewReno"));
413 if (not strcmp(TcpProtocol, "Tahoe")) {
414 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
415 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpTahoe"));
419 xbt_die("The ns3/TcpModel must be : NewReno or Reno or Tahoe");
422 void ns3_add_cluster(const char* id, char* bw, char* lat)
424 ns3::NodeContainer Nodes;
426 for (unsigned int i = number_of_clusters_nodes; i < Cluster_nodes.GetN(); i++) {
427 Nodes.Add(Cluster_nodes.Get(i));
428 XBT_DEBUG("Add node %d to cluster",i);
430 number_of_clusters_nodes = Cluster_nodes.GetN();
432 XBT_DEBUG("Add router %d to cluster",nodes.GetN()-Nodes.GetN()-1);
433 Nodes.Add(nodes.Get(nodes.GetN()-Nodes.GetN()-1));
435 xbt_assert(Nodes.GetN() <= 65000, "Cluster with NS3 is limited to 65000 nodes");
436 ns3::CsmaHelper csma;
437 csma.SetChannelAttribute ("DataRate", ns3::StringValue (bw));
438 csma.SetChannelAttribute ("Delay", ns3::StringValue (lat));
439 ns3::NetDeviceContainer devices = csma.Install (Nodes);
440 XBT_DEBUG("Create CSMA");
442 char * adr = bprintf("%d.%d.0.0",number_of_networks,number_of_links);
443 XBT_DEBUG("Assign IP Addresses %s to CSMA.",adr);
444 ns3::Ipv4AddressHelper ipv4;
445 ipv4.SetBase (adr, "255.255.0.0");
447 interfaces.Add(ipv4.Assign (devices));
449 if(number_of_links == 255){
450 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
452 number_of_networks++;
456 XBT_DEBUG("Number of nodes in Cluster_nodes: %d",Cluster_nodes.GetN());
459 static char* transformIpv4Address (ns3::Ipv4Address from){
460 std::stringstream sstream;
462 std::string s = sstream.str();
463 return bprintf("%s",s.c_str());
466 void ns3_add_link(NetPointNs3* src, NetPointNs3* dst, char* bw, char* lat)
468 ns3::PointToPointHelper pointToPoint;
470 ns3::NetDeviceContainer netA;
471 ns3::Ipv4AddressHelper address;
473 int srcNum = src->node_num;
474 int dstNum = dst->node_num;
476 ns3::Ptr<ns3::Node> a = nodes.Get(srcNum);
477 ns3::Ptr<ns3::Node> b = nodes.Get(dstNum);
479 XBT_DEBUG("\tAdd PTP from %d to %d bw:'%s' lat:'%s'", srcNum, dstNum, bw, lat);
480 pointToPoint.SetDeviceAttribute ("DataRate", ns3::StringValue (bw));
481 pointToPoint.SetChannelAttribute ("Delay", ns3::StringValue (lat));
483 netA.Add(pointToPoint.Install (a, b));
485 char * adr = bprintf("%d.%d.0.0",number_of_networks,number_of_links);
486 address.SetBase (adr, "255.255.0.0");
487 XBT_DEBUG("\tInterface stack '%s'",adr);
489 interfaces.Add(address.Assign (netA));
491 if (IPV4addr.size() <= (unsigned)srcNum)
492 IPV4addr.resize(srcNum + 1, nullptr);
493 IPV4addr.at(srcNum) = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 2));
495 if (IPV4addr.size() <= (unsigned)dstNum)
496 IPV4addr.resize(dstNum + 1, nullptr);
497 IPV4addr.at(dstNum) = transformIpv4Address(interfaces.GetAddress(interfaces.GetN() - 1));
499 if (number_of_links == 255){
500 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
502 number_of_networks++;