1 /* Copyright (c) 2007-2016. 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_interface.h"
14 #include "ns3/ns3_simulator.h"
15 #include "network_ns3.hpp"
17 #include "src/surf/HostImpl.hpp"
18 #include "src/surf/surf_private.h"
19 #include "simgrid/sg_config.h"
20 #include "src/instr/instr_private.h" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
22 #include "simgrid/s4u/As.hpp"
24 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ns3, surf, "Logging specific to the SURF network NS3 module");
26 xbt_dynar_t IPV4addr = xbt_dynar_new(sizeof(char*),free);
32 extern xbt_dict_t flowFromSock;
34 static ns3::InternetStackHelper stack;
35 static ns3::NodeContainer nodes;
36 static ns3::NodeContainer Cluster_nodes;
37 static ns3::Ipv4InterfaceContainer interfaces;
39 static int number_of_nodes = 0;
40 static int number_of_clusters_nodes = 0;
41 static int number_of_links = 1;
42 static int number_of_networks = 1;
43 static int port_number = 1025; //Port number is limited from 1025 to 65 000
47 ns3::Ptr<ns3::Node> node = ns3::CreateObject<ns3::Node>(0);
50 node_num = number_of_nodes++;
57 static void ns3_add_host(simgrid::s4u::Host& host)
59 host.extension_set<HostNs3>(new HostNs3());
62 static void ns3_add_netcard(simgrid::kernel::routing::NetCard* netcard)
64 xbt_lib_set(as_router_lib, netcard->name(), NS3_ASR_LEVEL, new HostNs3());
67 #include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
68 static void parse_ns3_add_cluster(sg_platf_cluster_cbarg_t cluster)
70 char* lat = bprintf("%fs", cluster->lat);
71 char* bw = bprintf("%fBps", cluster->bw);
73 for (int i : *cluster->radicals) {
74 char* router_id = bprintf("router_%s%d%s", cluster->prefix, i, cluster->suffix);
76 simgrid::s4u::Host* router = new simgrid::s4u::Host(router_id);
77 ns3_add_host(*router);
79 // Create private link
80 char* host_id = bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
81 HostNs3* host_src = ns3_find_host(host_id);
82 HostNs3* host_dst = router->extension<HostNs3>();
84 xbt_assert(host_src && host_dst, "\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
86 ns3_add_link(host_src->node_num, host_dst->node_num, bw,lat);
94 //Create link backbone
95 lat = bprintf("%fs", cluster->bb_lat);
96 bw = bprintf("%fBps", cluster->bb_bw);
97 ns3_add_cluster(cluster->id, bw, lat);
102 /* Create the ns3 topology based on routing strategy */
103 static void create_ns3_topology(void)
105 XBT_DEBUG("Starting topology generation");
107 xbt_dynar_shrink(IPV4addr,0);
109 //get the onelinks from the parsed platform
110 xbt_dynar_t onelink_routes = routing_platf->getOneLinkRoutes();
112 std::unordered_set<simgrid::surf::LinkNS3*> already_seen = std::unordered_set<simgrid::surf::LinkNS3*>();
114 XBT_DEBUG("There is %ld one-link routes",onelink_routes->used);
115 simgrid::kernel::routing::Onelink *onelink;
117 xbt_dynar_foreach(onelink_routes, iter, onelink) {
118 char *src = onelink->src_->name();
119 char *dst = onelink->dst_->name();
120 simgrid::surf::LinkNS3 *link = static_cast<simgrid::surf::LinkNS3 *>(onelink->link_);
122 if (strcmp(src,dst) && (already_seen.find(link) == already_seen.end())) {
123 already_seen.insert(link);
124 XBT_DEBUG("Route from '%s' to '%s' with link '%s'", src, dst, link->getName());
125 char* link_bdw = bprintf("%fBps", link->bandwidth());
126 char* link_lat = bprintf("%fs", link->latency());
128 // XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
129 XBT_DEBUG("\tLink (%s) bdw:%s lat:%s", link->getName(), link_bdw, link_lat);
132 HostNs3* host_src = ns3_find_host(src);
134 host_src = static_cast<HostNs3*>(xbt_lib_get_or_null(as_router_lib, src, NS3_ASR_LEVEL));
135 HostNs3* host_dst = ns3_find_host(dst);
137 host_dst = static_cast<HostNs3*>(xbt_lib_get_or_null(as_router_lib, dst, NS3_ASR_LEVEL));
139 if (!host_src || !host_dst)
140 xbt_die("\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
142 ns3_add_link(host_src->node_num, host_dst->node_num, link_bdw, link_lat);
149 ns3::GlobalRouteManager::BuildGlobalRoutingDatabase();
150 ns3::GlobalRouteManager::InitializeRoutes();
156 void surf_network_model_init_NS3()
158 if (surf_network_model)
161 surf_network_model = new simgrid::surf::NetworkNS3Model();
162 all_existing_models->push_back(surf_network_model);
165 static simgrid::config::Flag<std::string> ns3_tcp_model("ns3/TcpModel",
166 "The ns3 tcp model can be : NewReno or Reno or Tahoe",
169 simgrid::xbt::Extension<simgrid::s4u::Host, HostNs3> HostNs3::EXTENSION_ID;
174 NetworkNS3Model::NetworkNS3Model() : NetworkModel() {
175 ns3_initialize(ns3_tcp_model.get().c_str());
177 routing_model_create(nullptr);
178 simgrid::s4u::Host::onCreation.connect(ns3_add_host);
179 simgrid::kernel::routing::netcardCreatedCallbacks.connect(ns3_add_netcard);
180 simgrid::surf::on_cluster.connect (&parse_ns3_add_cluster);
181 simgrid::surf::on_postparse.connect(&create_ns3_topology);
183 HostNs3::EXTENSION_ID = simgrid::s4u::Host::extension_create<HostNs3>();
185 NS3_ASR_LEVEL = xbt_lib_add_level(as_router_lib, xbt_free_f);
187 LogComponentEnable("UdpEchoClientApplication", ns3::LOG_LEVEL_INFO);
188 LogComponentEnable("UdpEchoServerApplication", ns3::LOG_LEVEL_INFO);
191 NetworkNS3Model::~NetworkNS3Model() {
192 xbt_dynar_free_container(&IPV4addr);
193 xbt_dict_free(&flowFromSock);
196 Link* NetworkNS3Model::createLink(const char *name, double bandwidth, double latency, e_surf_link_sharing_policy_t policy,
197 xbt_dict_t properties){
199 return new LinkNS3(this, name, properties, bandwidth, latency);
202 Action* NetworkNS3Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
204 return new NetworkNS3Action(this, size, src, dst);
207 double NetworkNS3Model::nextOccuringEvent(double now)
209 double time_to_next_flow_completion;
210 XBT_DEBUG("ns3_next_occuring_event");
212 //get the first relevant value from the running_actions list
213 if (!getRunningActionSet()->size() || now == 0.0)
218 time_to_next_flow_completion = ns3::Simulator::Now().GetSeconds() - surf_get_clock();
219 } while(double_equals(time_to_next_flow_completion, 0, sg_surf_precision));
221 XBT_DEBUG("min : %f", now);
222 XBT_DEBUG("ns3 time : %f", ns3::Simulator::Now().GetSeconds());
223 XBT_DEBUG("surf time : %f", surf_get_clock());
224 XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
226 return time_to_next_flow_completion;
229 void NetworkNS3Model::updateActionsState(double now, double delta)
231 static xbt_dynar_t socket_to_destroy = xbt_dynar_new(sizeof(char*),nullptr);
233 /* If there are no running flows, advance the NS3 simulator and return */
234 if (getRunningActionSet()->empty()) {
236 while(double_positive(now - ns3::Simulator::Now().GetSeconds(), sg_surf_precision))
237 ns3_simulator(now-ns3::Simulator::Now().GetSeconds());
242 xbt_dict_cursor_t cursor = nullptr;
245 xbt_dict_foreach(flowFromSock,cursor,ns3Socket,sgFlow){
246 NetworkNS3Action * action = sgFlow->action_;
247 XBT_DEBUG("Processing socket %p (action %p)",sgFlow,action);
248 action->setRemains(action->getCost() - sgFlow->sentBytes_);
250 if (TRACE_is_enabled() &&
251 action->getState() == Action::State::running){
252 double data_delta_sent = sgFlow->sentBytes_ - action->lastSent_;
254 std::vector<Link*> route = std::vector<Link*>();
256 routing_platf->getRouteAndLatency(action->src_->pimpl_netcard, action->dst_->pimpl_netcard, &route, nullptr);
257 for (auto link : route)
258 TRACE_surf_link_set_utilization (link->getName(), action->getCategory(), (data_delta_sent)/delta, now-delta, delta);
260 action->lastSent_ = sgFlow->sentBytes_;
263 if(sgFlow->finished_){
264 xbt_dynar_push(socket_to_destroy,&ns3Socket);
265 XBT_DEBUG("Destroy socket %p of action %p", ns3Socket, action);
267 action->setState(Action::State::done);
271 while (!xbt_dynar_is_empty(socket_to_destroy)){
272 xbt_dynar_pop(socket_to_destroy,&ns3Socket);
274 if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
275 SgFlow *flow = (SgFlow*)xbt_dict_get (flowFromSock, ns3Socket);
276 XBT_DEBUG ("Removing socket %p of action %p", ns3Socket, flow->action_);
278 xbt_dict_remove(flowFromSock, ns3Socket);
286 LinkNS3::LinkNS3(NetworkNS3Model *model, const char *name, xbt_dict_t props, double bandwidth, double latency)
287 : Link(model, name, props)
289 bandwidth_.peak = bandwidth;
290 latency_.peak = latency;
292 Link::onCreation(this);
299 void LinkNS3::apply_event(tmgr_trace_iterator_t event, double value)
303 void LinkNS3::setBandwidthTrace(tmgr_trace_t trace) {
304 xbt_die("The NS3 network model doesn't support bandwidth traces");
306 void LinkNS3::setLatencyTrace(tmgr_trace_t trace) {
307 xbt_die("The NS3 network model doesn't support latency traces");
314 NetworkNS3Action::NetworkNS3Action(Model* model, double size, s4u::Host* src, s4u::Host* dst)
315 : NetworkAction(model, size, false)
317 XBT_DEBUG("Communicate from %s to %s", src->name().c_str(), dst->name().c_str());
321 ns3_create_flow(src->name().c_str(), dst->name().c_str(), surf_get_clock(), size, this);
323 Link::onCommunicate(this, src, dst);
326 void NetworkNS3Action::suspend() {
330 void NetworkNS3Action::resume() {
334 /* Test whether a flow is suspended */
335 bool NetworkNS3Action::isSuspended()
340 int NetworkNS3Action::unref()
344 if (action_hook.is_linked())
345 stateSet_->erase(stateSet_->iterator_to(*this));
346 XBT_DEBUG ("Removing action %p", this);
356 void ns3_simulator(double maxSeconds){
357 if (maxSeconds > 0.0) // If there is a maximum amount of time to run
358 ns3::Simulator::Stop(ns3::Seconds(maxSeconds));
359 XBT_DEBUG("Start simulator for at most %fs",maxSeconds);
360 ns3::Simulator::Run ();
363 void ns3_create_flow(const char* a,const char *b,double startTime,u_int32_t TotalBytes,simgrid::surf::NetworkNS3Action * action)
365 int node1 = ns3_find_host(a)->node_num;
366 int node2 = ns3_find_host(b)->node_num;
368 ns3::Ptr<ns3::Node> src_node = nodes.Get(node1);
369 ns3::Ptr<ns3::Node> dst_node = nodes.Get(node2);
371 char* addr = (char*)xbt_dynar_get_as(IPV4addr,node2,char*);
373 XBT_DEBUG("ns3_create_flow %d Bytes from %d to %d with Interface %s",TotalBytes, node1, node2,addr);
374 ns3::PacketSinkHelper sink("ns3::TcpSocketFactory", ns3::InetSocketAddress (ns3::Ipv4Address::GetAny(), port_number));
375 sink.Install (dst_node);
377 ns3::Ptr<ns3::Socket> sock = ns3::Socket::CreateSocket (src_node, ns3::TcpSocketFactory::GetTypeId());
379 xbt_dict_set(flowFromSock, transformSocketPtr(sock), new SgFlow(TotalBytes, action), nullptr);
381 sock->Bind(ns3::InetSocketAddress(port_number));
382 XBT_DEBUG("Create flow starting to %fs + %fs = %fs",
383 startTime-ns3::Simulator::Now().GetSeconds(), ns3::Simulator::Now().GetSeconds(), startTime);
385 ns3::Simulator::Schedule (ns3::Seconds(startTime-ns3::Simulator::Now().GetSeconds()),
386 &StartFlow, sock, addr, port_number);
389 xbt_assert(port_number <= 65000, "Too many connections! Port number is saturated.");
392 // initialize the NS3 interface and environment
393 void ns3_initialize(const char* TcpProtocol){
399 ns3::Config::SetDefault ("ns3::TcpSocket::SegmentSize", ns3::UintegerValue (1024)); // 1024-byte packet for easier reading
400 ns3::Config::SetDefault ("ns3::TcpSocket::DelAckCount", ns3::UintegerValue (1));
402 if (!strcmp(TcpProtocol,"default"))
405 if (!strcmp(TcpProtocol,"Reno")) {
406 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
407 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpReno"));
410 if (!strcmp(TcpProtocol,"NewReno")) {
411 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
412 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpNewReno"));
415 if(!strcmp(TcpProtocol,"Tahoe")){
416 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
417 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpTahoe"));
421 xbt_die("The ns3/TcpModel must be : NewReno or Reno or Tahoe");
424 void ns3_add_cluster(const char* id, char* bw, char* lat)
426 ns3::NodeContainer Nodes;
428 for (unsigned int i = number_of_clusters_nodes; i < Cluster_nodes.GetN(); i++) {
429 Nodes.Add(Cluster_nodes.Get(i));
430 XBT_DEBUG("Add node %d to cluster",i);
432 number_of_clusters_nodes = Cluster_nodes.GetN();
434 XBT_DEBUG("Add router %d to cluster",nodes.GetN()-Nodes.GetN()-1);
435 Nodes.Add(nodes.Get(nodes.GetN()-Nodes.GetN()-1));
437 xbt_assert(Nodes.GetN() <= 65000, "Cluster with NS3 is limited to 65000 nodes");
438 ns3::CsmaHelper csma;
439 csma.SetChannelAttribute ("DataRate", ns3::StringValue (bw));
440 csma.SetChannelAttribute ("Delay", ns3::StringValue (lat));
441 ns3::NetDeviceContainer devices = csma.Install (Nodes);
442 XBT_DEBUG("Create CSMA");
444 char * adr = bprintf("%d.%d.0.0",number_of_networks,number_of_links);
445 XBT_DEBUG("Assign IP Addresses %s to CSMA.",adr);
446 ns3::Ipv4AddressHelper ipv4;
447 ipv4.SetBase (adr, "255.255.0.0");
449 interfaces.Add(ipv4.Assign (devices));
451 if(number_of_links == 255){
452 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
454 number_of_networks++;
458 XBT_DEBUG("Number of nodes in Cluster_nodes: %d",Cluster_nodes.GetN());
461 static char* transformIpv4Address (ns3::Ipv4Address from){
462 std::stringstream sstream;
464 std::string s = sstream.str();
465 return bprintf("%s",s.c_str());
468 void ns3_add_link(int src, int dst, char *bw, char *lat)
470 ns3::PointToPointHelper pointToPoint;
472 ns3::NetDeviceContainer netA;
473 ns3::Ipv4AddressHelper address;
475 ns3::Ptr<ns3::Node> a = nodes.Get(src);
476 ns3::Ptr<ns3::Node> b = nodes.Get(dst);
478 XBT_DEBUG("\tAdd PTP from %d to %d bw:'%s' lat:'%s'",src,dst,bw,lat);
479 pointToPoint.SetDeviceAttribute ("DataRate", ns3::StringValue (bw));
480 pointToPoint.SetChannelAttribute ("Delay", ns3::StringValue (lat));
482 netA.Add(pointToPoint.Install (a, b));
484 char * adr = bprintf("%d.%d.0.0",number_of_networks,number_of_links);
485 address.SetBase (adr, "255.255.0.0");
486 XBT_DEBUG("\tInterface stack '%s'",adr);
488 interfaces.Add(address.Assign (netA));
490 char *tmp = transformIpv4Address(interfaces.GetAddress(interfaces.GetN()-2));
491 xbt_dynar_set_as(IPV4addr,src,char*,tmp);
492 XBT_DEBUG("Have write '%s' for Node '%d'",(char*)xbt_dynar_get_as(IPV4addr,src,char*),src);
494 tmp = transformIpv4Address(interfaces.GetAddress(interfaces.GetN()-1));
495 xbt_dynar_set_as(IPV4addr,dst,char*,tmp);
496 XBT_DEBUG("Have write '%s' for Node '%d'",(char*)xbt_dynar_get_as(IPV4addr,dst,char*),dst);
498 if (number_of_links == 255){
499 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
501 number_of_networks++;