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 "simgrid/sg_config.h"
18 #include "src/instr/instr_private.h" // TRACE_is_enabled(). FIXME: remove by subscribing tracing to the surf signals
19 #include "src/kernel/routing/NetCard.hpp"
20 #include "src/surf/HostImpl.hpp"
21 #include "src/surf/surf_private.h"
23 #include "simgrid/s4u/As.hpp"
24 #include "simgrid/s4u/engine.hpp"
26 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ns3, surf, "Logging specific to the SURF network NS3 module");
28 xbt_dynar_t IPV4addr = xbt_dynar_new(sizeof(char*),free);
34 extern xbt_dict_t flowFromSock;
36 static ns3::InternetStackHelper stack;
37 static ns3::NodeContainer nodes;
38 static ns3::NodeContainer Cluster_nodes;
39 static ns3::Ipv4InterfaceContainer interfaces;
41 static int number_of_nodes = 0;
42 static int number_of_clusters_nodes = 0;
43 static int number_of_links = 1;
44 static int number_of_networks = 1;
45 static int port_number = 1025; //Port number is limited from 1025 to 65 000
49 ns3::Ptr<ns3::Node> node = ns3::CreateObject<ns3::Node>(0);
52 node_num = number_of_nodes++;
59 static void ns3_add_host(simgrid::s4u::Host& host)
61 host.extension_set<HostNs3>(new HostNs3());
64 static void ns3_add_netcard(simgrid::kernel::routing::NetCard* netcard)
66 xbt_lib_set(as_router_lib, netcard->name().c_str(), NS3_ASR_LEVEL, new HostNs3());
69 #include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
70 static void parse_ns3_add_cluster(sg_platf_cluster_cbarg_t cluster)
72 char* lat = bprintf("%fs", cluster->lat);
73 char* bw = bprintf("%fBps", cluster->bw);
75 for (int i : *cluster->radicals) {
76 char* router_id = bprintf("router_%s%d%s", cluster->prefix, i, cluster->suffix);
78 simgrid::s4u::Host* router = new simgrid::s4u::Host(router_id);
79 ns3_add_host(*router);
81 // Create private link
82 char* host_id = bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
83 HostNs3* host_src = ns3_find_host(host_id);
84 HostNs3* host_dst = router->extension<HostNs3>();
86 xbt_assert(host_src && host_dst, "\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
88 ns3_add_link(host_src->node_num, host_dst->node_num, bw,lat);
96 //Create link backbone
97 lat = bprintf("%fs", cluster->bb_lat);
98 bw = bprintf("%fBps", cluster->bb_bw);
99 ns3_add_cluster(cluster->id, bw, lat);
104 /* Create the ns3 topology based on routing strategy */
105 static void create_ns3_topology(void)
107 XBT_DEBUG("Starting topology generation");
109 xbt_dynar_shrink(IPV4addr,0);
111 //get the onelinks from the parsed platform
112 std::vector<simgrid::kernel::routing::Onelink*> onelink_routes;
113 static_cast<simgrid::kernel::routing::AsImpl*>(simgrid::s4u::Engine::instance()->rootAs())
114 ->getOneLinkRoutes(&onelink_routes);
116 std::unordered_set<simgrid::surf::LinkNS3*> already_seen = std::unordered_set<simgrid::surf::LinkNS3*>();
118 XBT_DEBUG("There is %ld one-link routes", onelink_routes.size());
119 for (simgrid::kernel::routing::Onelink* onelink : onelink_routes) {
120 const char* src = onelink->src_->name().c_str();
121 const char* dst = onelink->dst_->name().c_str();
122 simgrid::surf::LinkNS3 *link = static_cast<simgrid::surf::LinkNS3 *>(onelink->link_);
124 if (strcmp(src,dst) && (already_seen.find(link) == already_seen.end())) {
125 already_seen.insert(link);
126 XBT_DEBUG("Route from '%s' to '%s' with link '%s'", src, dst, link->getName());
127 char* link_bdw = bprintf("%fBps", link->bandwidth());
128 char* link_lat = bprintf("%fs", link->latency());
130 // XBT_DEBUG("src (%s), dst (%s), src_id = %d, dst_id = %d",src,dst, src_id, dst_id);
131 XBT_DEBUG("\tLink (%s) bdw:%s lat:%s", link->getName(), link_bdw, link_lat);
134 HostNs3* host_src = ns3_find_host(src);
136 host_src = static_cast<HostNs3*>(xbt_lib_get_or_null(as_router_lib, src, NS3_ASR_LEVEL));
137 HostNs3* host_dst = ns3_find_host(dst);
139 host_dst = static_cast<HostNs3*>(xbt_lib_get_or_null(as_router_lib, dst, NS3_ASR_LEVEL));
141 if (!host_src || !host_dst)
142 xbt_die("\tns3_add_link from %d to %d",host_src->node_num,host_dst->node_num);
144 ns3_add_link(host_src->node_num, host_dst->node_num, link_bdw, link_lat);
151 ns3::GlobalRouteManager::BuildGlobalRoutingDatabase();
152 ns3::GlobalRouteManager::InitializeRoutes();
158 void surf_network_model_init_NS3()
160 if (surf_network_model)
163 surf_network_model = new simgrid::surf::NetworkNS3Model();
164 all_existing_models->push_back(surf_network_model);
167 static simgrid::config::Flag<std::string> ns3_tcp_model("ns3/TcpModel",
168 "The ns3 tcp model can be : NewReno or Reno or Tahoe",
171 simgrid::xbt::Extension<simgrid::s4u::Host, HostNs3> HostNs3::EXTENSION_ID;
176 NetworkNS3Model::NetworkNS3Model() : NetworkModel() {
177 ns3_initialize(ns3_tcp_model.get().c_str());
179 simgrid::s4u::Host::onCreation.connect(ns3_add_host);
180 simgrid::kernel::routing::netcardCreatedCallbacks.connect(ns3_add_netcard);
181 simgrid::surf::on_cluster.connect (&parse_ns3_add_cluster);
182 simgrid::surf::on_postparse.connect(&create_ns3_topology);
184 HostNs3::EXTENSION_ID = simgrid::s4u::Host::extension_create<HostNs3>();
186 NS3_ASR_LEVEL = xbt_lib_add_level(as_router_lib, xbt_free_f);
188 LogComponentEnable("UdpEchoClientApplication", ns3::LOG_LEVEL_INFO);
189 LogComponentEnable("UdpEchoServerApplication", ns3::LOG_LEVEL_INFO);
192 NetworkNS3Model::~NetworkNS3Model() {
193 xbt_dynar_free_container(&IPV4addr);
194 xbt_dict_free(&flowFromSock);
197 Link* NetworkNS3Model::createLink(const char* name, double bandwidth, double latency,
198 e_surf_link_sharing_policy_t policy)
200 return new LinkNS3(this, name, bandwidth, latency);
203 Action* NetworkNS3Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
205 return new NetworkNS3Action(this, size, src, dst);
208 double NetworkNS3Model::nextOccuringEvent(double now)
210 double time_to_next_flow_completion;
211 XBT_DEBUG("ns3_next_occuring_event");
213 //get the first relevant value from the running_actions list
214 if (!getRunningActionSet()->size() || now == 0.0)
219 time_to_next_flow_completion = ns3::Simulator::Now().GetSeconds() - surf_get_clock();
220 } while(double_equals(time_to_next_flow_completion, 0, sg_surf_precision));
222 XBT_DEBUG("min : %f", now);
223 XBT_DEBUG("ns3 time : %f", ns3::Simulator::Now().GetSeconds());
224 XBT_DEBUG("surf time : %f", surf_get_clock());
225 XBT_DEBUG("Next completion %f :", time_to_next_flow_completion);
227 return time_to_next_flow_completion;
230 void NetworkNS3Model::updateActionsState(double now, double delta)
232 static xbt_dynar_t socket_to_destroy = xbt_dynar_new(sizeof(char*),nullptr);
234 /* If there are no running flows, advance the NS3 simulator and return */
235 if (getRunningActionSet()->empty()) {
237 while(double_positive(now - ns3::Simulator::Now().GetSeconds(), sg_surf_precision))
238 ns3_simulator(now-ns3::Simulator::Now().GetSeconds());
243 xbt_dict_cursor_t cursor = nullptr;
246 xbt_dict_foreach(flowFromSock,cursor,ns3Socket,sgFlow){
247 NetworkNS3Action * action = sgFlow->action_;
248 XBT_DEBUG("Processing socket %p (action %p)",sgFlow,action);
249 action->setRemains(action->getCost() - sgFlow->sentBytes_);
251 if (TRACE_is_enabled() &&
252 action->getState() == Action::State::running){
253 double data_delta_sent = sgFlow->sentBytes_ - action->lastSent_;
255 std::vector<Link*> route = std::vector<Link*>();
257 action->src_->routeTo(action->dst_, &route, nullptr);
258 for (auto link : route)
259 TRACE_surf_link_set_utilization (link->getName(), action->getCategory(), (data_delta_sent)/delta, now-delta, delta);
261 action->lastSent_ = sgFlow->sentBytes_;
264 if(sgFlow->finished_){
265 xbt_dynar_push(socket_to_destroy,&ns3Socket);
266 XBT_DEBUG("Destroy socket %p of action %p", ns3Socket, action);
268 action->setState(Action::State::done);
272 while (!xbt_dynar_is_empty(socket_to_destroy)){
273 xbt_dynar_pop(socket_to_destroy,&ns3Socket);
275 if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
276 SgFlow *flow = (SgFlow*)xbt_dict_get (flowFromSock, ns3Socket);
277 XBT_DEBUG ("Removing socket %p of action %p", ns3Socket, flow->action_);
279 xbt_dict_remove(flowFromSock, ns3Socket);
287 LinkNS3::LinkNS3(NetworkNS3Model* model, const char* name, double bandwidth, double latency)
288 : Link(model, name, nullptr)
290 bandwidth_.peak = bandwidth;
291 latency_.peak = latency;
293 Link::onCreation(this);
300 void LinkNS3::apply_event(tmgr_trace_iterator_t event, double value)
304 void LinkNS3::setBandwidthTrace(tmgr_trace_t trace) {
305 xbt_die("The NS3 network model doesn't support bandwidth traces");
307 void LinkNS3::setLatencyTrace(tmgr_trace_t trace) {
308 xbt_die("The NS3 network model doesn't support latency traces");
315 NetworkNS3Action::NetworkNS3Action(Model* model, double size, s4u::Host* src, s4u::Host* dst)
316 : NetworkAction(model, size, false)
318 XBT_DEBUG("Communicate from %s to %s", src->name().c_str(), dst->name().c_str());
322 ns3_create_flow(src->name().c_str(), dst->name().c_str(), surf_get_clock(), size, this);
324 Link::onCommunicate(this, src, dst);
327 void NetworkNS3Action::suspend() {
331 void NetworkNS3Action::resume() {
335 /* Test whether a flow is suspended */
336 bool NetworkNS3Action::isSuspended()
341 int NetworkNS3Action::unref()
345 if (action_hook.is_linked())
346 stateSet_->erase(stateSet_->iterator_to(*this));
347 XBT_DEBUG ("Removing action %p", this);
357 void ns3_simulator(double maxSeconds){
358 if (maxSeconds > 0.0) // If there is a maximum amount of time to run
359 ns3::Simulator::Stop(ns3::Seconds(maxSeconds));
360 XBT_DEBUG("Start simulator for at most %fs",maxSeconds);
361 ns3::Simulator::Run ();
364 void ns3_create_flow(const char* a,const char *b,double startTime,u_int32_t TotalBytes,simgrid::surf::NetworkNS3Action * action)
366 int node1 = ns3_find_host(a)->node_num;
367 int node2 = ns3_find_host(b)->node_num;
369 ns3::Ptr<ns3::Node> src_node = nodes.Get(node1);
370 ns3::Ptr<ns3::Node> dst_node = nodes.Get(node2);
372 char* addr = (char*)xbt_dynar_get_as(IPV4addr,node2,char*);
374 XBT_DEBUG("ns3_create_flow %d Bytes from %d to %d with Interface %s",TotalBytes, node1, node2,addr);
375 ns3::PacketSinkHelper sink("ns3::TcpSocketFactory", ns3::InetSocketAddress (ns3::Ipv4Address::GetAny(), port_number));
376 sink.Install (dst_node);
378 ns3::Ptr<ns3::Socket> sock = ns3::Socket::CreateSocket (src_node, ns3::TcpSocketFactory::GetTypeId());
380 xbt_dict_set(flowFromSock, transformSocketPtr(sock), new SgFlow(TotalBytes, action), nullptr);
382 sock->Bind(ns3::InetSocketAddress(port_number));
383 XBT_DEBUG("Create flow starting to %fs + %fs = %fs",
384 startTime-ns3::Simulator::Now().GetSeconds(), ns3::Simulator::Now().GetSeconds(), startTime);
386 ns3::Simulator::Schedule (ns3::Seconds(startTime-ns3::Simulator::Now().GetSeconds()),
387 &StartFlow, sock, addr, port_number);
390 xbt_assert(port_number <= 65000, "Too many connections! Port number is saturated.");
393 // initialize the NS3 interface and environment
394 void ns3_initialize(const char* TcpProtocol){
400 ns3::Config::SetDefault ("ns3::TcpSocket::SegmentSize", ns3::UintegerValue (1024)); // 1024-byte packet for easier reading
401 ns3::Config::SetDefault ("ns3::TcpSocket::DelAckCount", ns3::UintegerValue (1));
403 if (!strcmp(TcpProtocol,"default"))
406 if (!strcmp(TcpProtocol,"Reno")) {
407 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
408 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpReno"));
411 if (!strcmp(TcpProtocol,"NewReno")) {
412 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
413 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpNewReno"));
416 if(!strcmp(TcpProtocol,"Tahoe")){
417 XBT_INFO("Switching Tcp protocol to '%s'",TcpProtocol);
418 ns3::Config::SetDefault ("ns3::TcpL4Protocol::SocketType", ns3::StringValue("ns3::TcpTahoe"));
422 xbt_die("The ns3/TcpModel must be : NewReno or Reno or Tahoe");
425 void ns3_add_cluster(const char* id, char* bw, char* lat)
427 ns3::NodeContainer Nodes;
429 for (unsigned int i = number_of_clusters_nodes; i < Cluster_nodes.GetN(); i++) {
430 Nodes.Add(Cluster_nodes.Get(i));
431 XBT_DEBUG("Add node %d to cluster",i);
433 number_of_clusters_nodes = Cluster_nodes.GetN();
435 XBT_DEBUG("Add router %d to cluster",nodes.GetN()-Nodes.GetN()-1);
436 Nodes.Add(nodes.Get(nodes.GetN()-Nodes.GetN()-1));
438 xbt_assert(Nodes.GetN() <= 65000, "Cluster with NS3 is limited to 65000 nodes");
439 ns3::CsmaHelper csma;
440 csma.SetChannelAttribute ("DataRate", ns3::StringValue (bw));
441 csma.SetChannelAttribute ("Delay", ns3::StringValue (lat));
442 ns3::NetDeviceContainer devices = csma.Install (Nodes);
443 XBT_DEBUG("Create CSMA");
445 char * adr = bprintf("%d.%d.0.0",number_of_networks,number_of_links);
446 XBT_DEBUG("Assign IP Addresses %s to CSMA.",adr);
447 ns3::Ipv4AddressHelper ipv4;
448 ipv4.SetBase (adr, "255.255.0.0");
450 interfaces.Add(ipv4.Assign (devices));
452 if(number_of_links == 255){
453 xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
455 number_of_networks++;
459 XBT_DEBUG("Number of nodes in Cluster_nodes: %d",Cluster_nodes.GetN());
462 static char* transformIpv4Address (ns3::Ipv4Address from){
463 std::stringstream sstream;
465 std::string s = sstream.str();
466 return bprintf("%s",s.c_str());
469 void ns3_add_link(int src, int dst, char *bw, char *lat)
471 ns3::PointToPointHelper pointToPoint;
473 ns3::NetDeviceContainer netA;
474 ns3::Ipv4AddressHelper address;
476 ns3::Ptr<ns3::Node> a = nodes.Get(src);
477 ns3::Ptr<ns3::Node> b = nodes.Get(dst);
479 XBT_DEBUG("\tAdd PTP from %d to %d bw:'%s' lat:'%s'",src,dst,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 char *tmp = transformIpv4Address(interfaces.GetAddress(interfaces.GetN()-2));
492 xbt_dynar_set_as(IPV4addr,src,char*,tmp);
493 XBT_DEBUG("Have write '%s' for Node '%d'",(char*)xbt_dynar_get_as(IPV4addr,src,char*),src);
495 tmp = transformIpv4Address(interfaces.GetAddress(interfaces.GetN()-1));
496 xbt_dynar_set_as(IPV4addr,dst,char*,tmp);
497 XBT_DEBUG("Have write '%s' for Node '%d'",(char*)xbt_dynar_get_as(IPV4addr,dst,char*),dst);
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++;