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;
19 void static tcp_sent_callback(void* action, double completion_time);
22 // TODO: check the default values.
27 sim_ = new Simulator();
28 topo_ = new GTNETS_Topology();
31 // Set default values.
32 TCP::DefaultAdvWin(wsize);
33 TCP::DefaultSegSize(1000);
34 TCP::DefaultTxBuffer(128000);
35 TCP::DefaultRxBuffer(128000);
38 rm_ = new RoutingManual();
39 Routing::SetRouting(rm_);
44 map<int, Linkp2p*>::iterator it;
45 for (it = gtnets_links_.begin(); it != gtnets_links_.end(); it++){
48 while (!gtnets_links_.empty())
49 gtnets_links_.erase(gtnets_links_.begin());
51 map<int, Node*>::iterator it3;
52 for (it3 = gtnets_nodes_.begin(); it3 != gtnets_nodes_.end(); it3++){
55 while (!gtnets_nodes_.empty())
56 gtnets_nodes_.erase(gtnets_nodes_.begin());
58 map<int, TCPServer*>::iterator it4;
59 for (it4 = gtnets_servers_.begin(); it4 != gtnets_servers_.end(); it4++){
62 while (!gtnets_servers_.empty())
63 gtnets_servers_.erase(gtnets_servers_.begin());
65 map<int, TCPSend*>::iterator it5;
66 for (it5 = gtnets_clients_.begin(); it5 != gtnets_clients_.end(); it5++){
69 while (!gtnets_clients_.empty())
70 gtnets_clients_.erase(gtnets_clients_.begin());
81 int GTSim::add_router(int id){
82 if (topo_->add_router(id) < 0){
83 fprintf(stderr, "can't add router %d. already exists.\n", id);
88 //bandwidth: in bytes.
89 //latency: in seconds.
90 int GTSim::add_link(int id, double bandwidth, double latency){
91 double bw = bandwidth * 8; //Bandwidth in bits (used in GTNETS).
92 if (topo_->add_link(id) < 0){
93 fprintf(stderr, "can't add link %d. already exists.\n", id);
96 gtnets_links_[id] = new Linkp2p(bw, latency);
100 // if gtnets_nodes_ includes id, return true, otherwise return false.
101 bool GTSim::node_include(int id){
102 if (gtnets_nodes_.find(id) != gtnets_nodes_.end()) return true;
106 // if gtnets_link_ includes id, return true, otherwise return false.
107 bool GTSim::link_include(int id){
108 if (gtnets_links_.find(id) != gtnets_links_.end()) return true;
112 int GTSim::add_onehop_route(int src, int dst, int link){
113 if (topo_->add_onehop_route(src, dst, link) < 0){
114 fprintf(stderr, "Cannot add a route, src: %d, dst: %d, link: %d\n",
121 // Generate the gtnets nodes according to topo_.
122 void GTSim::add_nodes(){
123 static unsigned int address = IPAddr("192.168.0.1");
124 vector<GTNETS_Node*> nodes = topo_->nodes();
125 vector<GTNETS_Node*>::iterator it;
127 for (it = nodes.begin(); it != nodes.end(); it++){
129 gtnets_nodes_[id] = new Node();
130 gtnets_nodes_[id]->SetIPAddr(address++);
131 // printf("In GTSim, add_node: %d\n", id);
135 void GTSim::node_connect(){
137 map<int, GTNETS_Link*> links = topo_->links();
138 map<int, GTNETS_Link*>::iterator it;
139 int linkid, srcid, dstid;
140 for (it = links.begin(); it != links.end(); it++){
141 linkid = it->second->id();
142 //if link is used in a route, connect the two nodes.
143 if (it->second->src_node() && it->second->dst_node()){
145 srcid = it->second->src_node()->id();
146 dstid = it->second->dst_node()->id();
148 gtnets_nodes_[srcid]->
149 AddDuplexLink(gtnets_nodes_[dstid], *(gtnets_links_[linkid]));
154 // Create nodes and routes from the temporary topology, GTNETS_Topolgy.
155 void GTSim::create_gtnets_topology(){
160 // Add a route that includes more than one hop. All one hop
161 // routes must have been added. When this function is called
162 // for the first time, all gtnets nodes are generated.
163 int GTSim::add_route(int src, int dst, int* links, int nlink){
164 if (is_topology_ == 0){
165 create_gtnets_topology();
169 IPAddr_t mymask = IPAddr("255.255.255.255");
171 int src_node = topo_->nodeid_from_hostid(src);
172 int dst_node = topo_->nodeid_from_hostid(dst);
174 if (gtnets_nodes_.find(src_node) == gtnets_nodes_.end()){
175 fprintf(stderr, "node %d not found\n", src_node);
178 if (gtnets_nodes_.find(dst_node) == gtnets_nodes_.end()){
179 fprintf(stderr, "node %d not found\n", dst_node);
183 Node* tmpsrc = gtnets_nodes_[src_node];
184 Node* tmpdst = gtnets_nodes_[dst_node];
186 int next_node, cur_node;
189 for (int i = 0; i < nlink; i++){
190 if (gtnets_nodes_.find(cur_node) == gtnets_nodes_.end()){
191 fprintf(stderr, "node %d not found\n", cur_node);
194 next_node = topo_->peer_node_id(links[i], cur_node);
196 fprintf(stderr, "peer node not found\n");
199 if (gtnets_nodes_.find(next_node) == gtnets_nodes_.end()){
200 fprintf(stderr, "node %d not found\n", next_node);
205 Node* tmpcur = gtnets_nodes_[cur_node];
206 Node* tmpnext = gtnets_nodes_[next_node];
208 tmpcur->AddRoute(tmpdst->GetIPAddr(),
210 tmpcur->GetIfByNode(tmpnext),
211 tmpnext->GetIPAddr());
213 tmpnext->AddRoute(tmpsrc->GetIPAddr(),
215 tmpnext->GetIfByNode(tmpcur),
216 tmpcur->GetIPAddr());
218 cur_node = next_node;
221 if (cur_node != dst_node){
222 fprintf(stderr, "Route inconsistency, last: %d, dst: %d\n",
232 int GTSim::create_flow(int src, int dst, long datasize, void* metadata){
233 //if no route with more than one links, topology has not been generated.
235 if (is_topology_ == 0){
236 create_gtnets_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);
261 gtnets_action_to_flow_[metadata] = nflow_;
267 Time_t GTSim::get_time_to_next_flow_completion(){
274 //remain needs to be updated in the future
281 if ( (soon_pid=fork()) != 0){
282 read(pfds[0], &t1, sizeof(Time_t));
283 waitpid(soon_pid, &status, 0);
286 t = sim_->RunUntilNextCompletion();
287 write(pfds[1], (const void*)&t, sizeof(Time_t));
294 double GTSim::gtnets_get_flow_rx(void *metadata){
295 int flow_id = gtnets_action_to_flow_[metadata];
296 return gtnets_servers_[flow_id]->totRx;
299 int GTSim::run_until_next_flow_completion(void ***metadata, int *number_of_flows){
302 meta_nflow = number_of_flows;
305 Time_t t1 = sim_->RunUntilNextCompletion();
307 *metadata = (meta_flows.empty() ? NULL : &meta_flows[0]);
311 int GTSim::run(double delta){
318 void static tcp_sent_callback(void* action, double completion_time){
319 // Schedule the flow complete event.
321 new SimulatorEvent(SimulatorEvent::FLOW_COMPLETE);
322 Simulator::instance->Schedule(e, 0, Simulator::instance);
325 meta_flows.push_back(action);