2 /* Copyright (c) 2007 Kayo Fujiwara. All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "gtnets_simulator.h"
8 #include "gtnets_topology.h"
14 static vector<void*> meta_flows;
15 static int* meta_nflow;
16 static int meta_flg = 0;
18 void static tcp_sent_callback(void* action, double completion_time);
21 // TODO: check the default values.
26 sim_ = new Simulator();
27 topo_ = new GTNETS_Topology();
29 // Set default values.
30 TCP::DefaultAdvWin(wsize);
31 TCP::DefaultSegSize(1000);
32 TCP::DefaultTxBuffer(128000);
33 TCP::DefaultRxBuffer(128000);
36 rm_ = new RoutingManual();
37 Routing::SetRouting(rm_);
42 map<int, Linkp2p*>::iterator it;
43 for (it = gtnets_links_.begin(); it != gtnets_links_.end(); it++){
46 while (!gtnets_links_.empty())
47 gtnets_links_.erase(gtnets_links_.begin());
49 map<int, Node*>::iterator it3;
50 for (it3 = gtnets_nodes_.begin(); it3 != gtnets_nodes_.end(); it3++){
53 while (!gtnets_nodes_.empty())
54 gtnets_nodes_.erase(gtnets_nodes_.begin());
56 map<int, TCPServer*>::iterator it4;
57 for (it4 = gtnets_servers_.begin(); it4 != gtnets_servers_.end(); it4++){
60 while (!gtnets_servers_.empty())
61 gtnets_servers_.erase(gtnets_servers_.begin());
63 map<int, TCPSend*>::iterator it5;
64 for (it5 = gtnets_clients_.begin(); it5 != gtnets_clients_.end(); it5++){
67 while (!gtnets_clients_.empty())
68 gtnets_clients_.erase(gtnets_clients_.begin());
79 int GTSim::add_router(int id){
80 if (topo_->add_router(id) < 0){
81 fprintf(stderr, "can't add router %d. already exists.\n", id);
86 //bandwidth: in bytes.
87 //latency: in seconds.
88 int GTSim::add_link(int id, double bandwidth, double latency){
89 double bw = bandwidth * 8; //Bandwidth in bits (used in GTNETS).
90 if (topo_->add_link(id) < 0){
91 fprintf(stderr, "can't add link %d. already exists.\n", id);
94 gtnets_links_[id] = new Linkp2p(bw, latency);
98 // if gtnets_nodes_ includes id, return true, otherwise return false.
99 bool GTSim::node_include(int id){
100 if (gtnets_nodes_.find(id) != gtnets_nodes_.end()) return true;
104 // if gtnets_link_ includes id, return true, otherwise return false.
105 bool GTSim::link_include(int id){
106 if (gtnets_links_.find(id) != gtnets_links_.end()) return true;
110 int GTSim::add_onehop_route(int src, int dst, int link){
111 if (topo_->add_onehop_route(src, dst, link) < 0){
112 fprintf(stderr, "Cannot add a route, src: %d, dst: %d, link: %d\n",
119 // Generate the gtnets nodes according to topo_.
120 void GTSim::add_nodes(){
121 static unsigned int address = IPAddr("192.168.0.1");
122 vector<GTNETS_Node*> nodes = topo_->nodes();
123 vector<GTNETS_Node*>::iterator it;
125 for (it = nodes.begin(); it != nodes.end(); it++){
127 gtnets_nodes_[id] = new Node();
128 gtnets_nodes_[id]->SetIPAddr(address++);
129 // printf("In GTSim, add_node: %d\n", id);
133 void GTSim::node_connect(){
135 map<int, GTNETS_Link*> links = topo_->links();
136 map<int, GTNETS_Link*>::iterator it;
137 int linkid, srcid, dstid;
138 for (it = links.begin(); it != links.end(); it++){
139 linkid = it->second->id();
140 //if link is used in a route, connect the two nodes.
141 if (it->second->src_node() && it->second->dst_node()){
143 srcid = it->second->src_node()->id();
144 dstid = it->second->dst_node()->id();
146 gtnets_nodes_[srcid]->
147 AddDuplexLink(gtnets_nodes_[dstid], *(gtnets_links_[linkid]));
152 // Create nodes and routes from the temporary topology, GTNETS_Topolgy.
153 void GTSim::create_gtnets_topology(){
158 // Add a route that includes more than one hop. All one hop
159 // routes must have been added. When this function is called
160 // for the first time, all gtnets nodes are generated.
161 int GTSim::add_route(int src, int dst, int* links, int nlink){
162 if (is_topology_ == 0){
163 create_gtnets_topology();
164 // topo_->print_topology();
168 IPAddr_t mymask = IPAddr("255.255.255.255");
170 int src_node = topo_->nodeid_from_hostid(src);
171 int dst_node = topo_->nodeid_from_hostid(dst);
173 if (gtnets_nodes_.find(src_node) == gtnets_nodes_.end()){
174 fprintf(stderr, "node %d not found\n", src_node);
177 if (gtnets_nodes_.find(dst_node) == gtnets_nodes_.end()){
178 fprintf(stderr, "node %d not found\n", dst_node);
182 Node* tmpsrc = gtnets_nodes_[src_node];
183 Node* tmpdst = gtnets_nodes_[dst_node];
185 int next_node, cur_node;
188 for (int i = 0; i < nlink; i++){
189 if (gtnets_nodes_.find(cur_node) == gtnets_nodes_.end()){
190 fprintf(stderr, "node %d not found\n", cur_node);
193 next_node = topo_->peer_node_id(links[i], cur_node);
195 fprintf(stderr, "peer node not found\n");
198 if (gtnets_nodes_.find(next_node) == gtnets_nodes_.end()){
199 fprintf(stderr, "node %d not found\n", next_node);
204 Node* tmpcur = gtnets_nodes_[cur_node];
205 Node* tmpnext = gtnets_nodes_[next_node];
207 tmpcur->AddRoute(tmpdst->GetIPAddr(),
209 tmpcur->GetIfByNode(tmpnext),
210 tmpnext->GetIPAddr());
212 tmpnext->AddRoute(tmpsrc->GetIPAddr(),
214 tmpnext->GetIfByNode(tmpcur),
215 tmpcur->GetIPAddr());
217 cur_node = next_node;
220 if (cur_node != dst_node){
221 fprintf(stderr, "Route inconsistency, last: %d, dst: %d\n",
231 int GTSim::create_flow(int src, int dst, long datasize, void* metadata){
232 //if no route with more than one links, topology has not been generated.
234 if (is_topology_ == 0){
235 create_gtnets_topology();
236 // topo_->print_topology();
240 int src_node = topo_->nodeid_from_hostid(src);
242 fprintf(stderr, "src %d not found\n");
245 int dst_node = topo_->nodeid_from_hostid(dst);
247 fprintf(stderr, "dst %d not found\n");
251 gtnets_servers_[nflow_] = (TCPServer*)gtnets_nodes_[dst_node]->
252 AddApplication(TCPServer(TCPReno()));
253 gtnets_servers_[nflow_]->BindAndListen(80);
255 gtnets_clients_[nflow_] = (TCPSend*)gtnets_nodes_[src_node]->
256 AddApplication(TCPSend(metadata, gtnets_nodes_[dst_node]->GetIPAddr(),
257 80, Constant(datasize), TCPReno()));
258 gtnets_clients_[nflow_]->SetSendCallBack(tcp_sent_callback);
259 gtnets_clients_[nflow_]->Start(0);
265 Time_t GTSim::get_time_to_next_flow_completion(){
275 read(pfds[0], &t1, sizeof(Time_t));
276 waitpid(-1, &status, 0);
279 t = sim_->RunUntilNextCompletion();
280 write(pfds[1], (const void*)&t, sizeof(Time_t));
287 int GTSim::run_until_next_flow_completion(void ***metadata, int *number_of_flows){
289 meta_nflow = number_of_flows;
292 Time_t t1 = sim_->RunUntilNextCompletion();
294 *metadata = (meta_flows.empty() ? NULL : &meta_flows[0]);
298 int GTSim::run(double delta){
305 void static tcp_sent_callback(void* action, double completion_time){
306 // Schedule the flow complete event.
308 new SimulatorEvent(SimulatorEvent::FLOW_COMPLETE);
309 Simulator::instance->Schedule(e, 0, Simulator::instance);
312 meta_flows.push_back(action);