-
Notifications
You must be signed in to change notification settings - Fork 0
/
mainServer.cpp
329 lines (285 loc) · 10.4 KB
/
mainServer.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <strings.h>
#include <arpa/inet.h>
#include <iostream>
#include <sstream>
#include <iomanip>
#define buff_size 256 //max length for the name passed
#define cliPort 21543
#define mainPort 22543
#define dbPort 23543
#define calcPort 24543
#define mntrPort 25543
#define sa struct sockaddr
char inputData[buff_size] = {0};
char outputData[buff_size] = {0};
char logData[buff_size] = {0};
using namespace std;
// Function declaration for message exchange between client and server
void recvInputData(int sock);
void splitInput(int&,int&);
void showData(string);
void res(string);
int main() {
int soc_s, conn_s, soc_m, soc_o, conn_o, n, id=0, size=0, response, bnd, flag=0;
struct sockaddr_in serverAddr, clientAddr, dbaddr, calcaddr, mainaddr, mntrAddr;
char buffer[buff_size] = {0}, data[buff_size], calc[buff_size];
socklen_t len;
// TCP client socket creation and verification
soc_s = socket(AF_INET, SOCK_STREAM, 0);
if (soc_s == -1) {
cout<<"Client socket creation failed."<<endl;
exit(0);
}
/*else
cout<<"Client socket successfully created."<<endl;*/
bzero(&serverAddr, sizeof(serverAddr));
// assign IP, PORT
serverAddr.sin_family = AF_INET;
serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
serverAddr.sin_port = htons(cliPort);
// Binding newly created socket to given IP and its verification
if ((bind(soc_s, (sa*)&serverAddr, sizeof(serverAddr))) != 0) {
cout<<"Socket binding failed."<<endl;
exit(0);
}
/*else
cout<<"Socket successfully binded."<<endl;*/
// Server listening and its verification
if ((listen(soc_s, 20)) != 0) {
cout<<"Listen failed."<<endl;
exit(0);
}
/*else
cout<<"Server listening."<<endl;*/
socklen_t db_addr_len = sizeof(dbaddr);
// Running self as server (For listening)
bzero(&mainaddr, sizeof(mainaddr));
mainaddr.sin_family = AF_INET;
mainaddr.sin_addr.s_addr = htonl(INADDR_ANY);
mainaddr.sin_port = htons(mainPort);
// UDP socket creation and verification
soc_m = socket(PF_INET, SOCK_DGRAM, 0);
if (soc_m < 0) {
cout << "ERROR: Setting socket" << endl;
}
bnd = bind(soc_m, (sa *)&mainaddr, sizeof(mainaddr));
if (bnd < 0) {
cout << "ERROR: Binding socket" << endl;
}
cout<<"The Main Server is up and running."<<endl;
bzero(&dbaddr, sizeof(dbaddr));
dbaddr.sin_family = AF_INET;
dbaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
dbaddr.sin_port = htons(dbPort);
socklen_t calc_addr_len = sizeof(calcaddr);
bzero(&calcaddr, sizeof(calcaddr));
calcaddr.sin_family = AF_INET;
calcaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
calcaddr.sin_port = htons(calcPort);
// TCP monitor socket creation and verification
soc_o = socket(AF_INET, SOCK_STREAM, 0);
if (soc_o == -1) {
cout<<"Monitor socket creation failed."<<endl;
exit(0);
}
/*else
cout<<"Socket successfully created."<<endl;*/
bzero(&mntrAddr, sizeof(mntrAddr));
// assign IP, PORT
mntrAddr.sin_family = AF_INET;
mntrAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
mntrAddr.sin_port = htons(mntrPort);
// Client connection to Server and its verification
conn_o = connect(soc_o, (sa*)&mntrAddr, sizeof(mntrAddr));
//cout<<"The monitor is ready to log."<<endl;
//Loop for client requests to connect until listen() hasn't exhausted
while (1) {
len = sizeof(clientAddr);
// Server connection and its verification
conn_s = accept(soc_s, (sa*)&clientAddr, &len);
if (conn_s < 0) {
cout<<"The Client server is down."<<endl;
exit(0);
}
/*else
cout<<"The Server is up and running."<<endl;*/
// Function call for message exchange between client and server
recvInputData(conn_s);
splitInput(id,size);
string d=to_string(id);
string z=to_string(size);
strcpy (logData, "Main server receives Link ");
strcat (logData ,d.c_str());
strcat (logData, " and file size ");
strcat (logData ,z.c_str());
strcat (logData, " MB from client.");
write (soc_o, logData, sizeof(logData));
cout << "Received Link " << id << ", File Size "<< size << "MB."<<endl;
response = sendto(soc_m, (char*)&id, buff_size, 0, (sa *)&dbaddr, sizeof(dbaddr));
if (response > 0) {
cout << "Sent Link "<< id <<" to Database Server." << endl;
strcpy (logData, "Main server sends Link ");
strcat (logData ,d.c_str());
strcat (logData, " to database server.");
write (soc_o, logData, sizeof(logData));
response = recvfrom(soc_m, buffer, sizeof(buffer), 0, (sa *)&dbaddr, &db_addr_len);
if (response > 0) {
buffer[response] = '\0';
strcpy(data,buffer);
/*for (int i = 0; buffer[i]!='\0'; i++ ) {
//cout << buffer[i];
data[i]=buffer[i];
}*/
if(strncmp(data,"NA",2)==0){
cout<<"Received no match found."<<endl<<endl;
strcpy(outputData, "No match found.");
strcpy(logData, "Main server receives information from database server: No match found.");
flag=-1;
}
else{
cout<<"Received ";
showData(data);
write (soc_o, logData, sizeof(logData));
}
} else {
cout << "ERROR: Receiving data" << endl;
}
} else {
cout << "ERROR: Sending data" << endl;
}
if(flag!=-1){
char sendCalcData[buff_size] = {0};
string sz=to_string(size);
strcat (sendCalcData, data);
strcat (sendCalcData, " ");
strcat (sendCalcData,sz.c_str());
strcat (sendCalcData, " ");
response = sendto(soc_m, (char*)&sendCalcData, buff_size, 0, (sa *)&calcaddr, sizeof(calcaddr));
if (response > 0) {
cout << endl <<"Sent information to Calculation Server." << endl;
strcpy (logData, "Main server sends information to calculation server.");
write (soc_o, logData, sizeof(logData));
response = recvfrom(soc_m, buffer, sizeof(buffer), 0, (sa *)&calcaddr, &calc_addr_len);
if (response > 0) {
buffer[response] = '\0';
for (int i = 0; buffer[i]!='\0'; i++ ) {
//cout << buffer[i];
calc[i]=buffer[i];
}
strcpy(outputData,calc);
//cout<<"outputData"<<outputData<<endl<<endl;
strcpy (logData, "Main server receives information from calculation server.");
write (soc_o, logData, sizeof(logData));
cout<<"Received ";
string result(calc);
res(result);
} else {
cout << "ERROR: Receiving data" << endl;
}
} else {
cout << "ERROR: Sending data" << endl;
}
}
flag=0;
write (conn_s, outputData, sizeof(outputData));
write (soc_o, logData, sizeof(logData));
close(conn_s);
}
return 0;
}
// Function designed for message exchange between client and server.
void recvInputData(int sock) {
char buf[buff_size];
//int n;
bzero(buf, buff_size);
// read the message from client and copy it in buffer
read(sock, buf, sizeof(buf));
strcpy(inputData,buf);
// if msg contains "Exit" then server exit and chat ended.
if (strncmp("exit", buf, 4) == 0) {
cout<<"Server Exit."<<endl;
exit(1); //break;
}
}
void splitInput(int &id, int &sz) {
string iddt, szdt;
string iData(inputData);
int pos=iData.find(" ");
iddt=iData.substr(0,(pos));
szdt=iData.substr(pos+1);
stringstream i(iddt);
i >> id;
//cout<<"ID: "<<id<<", ";
stringstream s(szdt);
s >> sz;
//cout<<"Size: "<<sz<<"MB. ";
}
void showData(string dt) {
int c,l,v;
string cap, len, vel, dat;
//cout<<endl<<"Data: "<<data<<endl;
int pos=dt.find(" ");
cap=dt.substr(0,(pos));
dat=dt.substr(pos+1);
stringstream cp(cap);
cp >> c;
cout<<"Link Capacity "<<c<<"Mbps, ";
int pos1=dat.find(" ");
len=dat.substr(0,(pos1));
stringstream ln(len);
ln >> l;
cout<<"Link Length "<<l<<"km, ";
vel=dat.substr(pos1+1);
stringstream vp(vel);
vp >> v;
cout<<"and Propagation Velocity "<<v<<"km/s.";
strcpy (logData, "Main server receives information from database server: link capacity ");
strcat (logData ,cap.c_str());
strcat (logData, "Mbps, link length ");
strcat (logData ,len.c_str());
strcat (logData, "km, and propagation velocity ");
strcat (logData ,vel.c_str());
strcat (logData, "km/s.");
}
void res(string r){
float tt,tp,sum;
string t, p, s, dat;
//cout<<endl<<"Res: "<<r<<endl;
int pos=r.find(" ");
t=r.substr(0,(pos));
dat=r.substr(pos+1);
stringstream stt(t);
stt >> tt;
int pos1=dat.find(" ");
p=dat.substr(0,(pos1));
dat=dat.substr(pos1+1);
stringstream stp(p);
stp >> tp;
int pos2=dat.find(" ");
s=dat.substr(0,(pos2));
stringstream ssum(s);
ssum >> sum;
cout<<"Transmission Delay "<<std::fixed<<std::setprecision(2)<<tt<<"ms, ";
cout<<"Propagation Delay "<<std::fixed<<std::setprecision(2)<<tp<<"ms, ";
cout<<"and Total Delay "<<std::fixed<<std::setprecision(2)<<sum<<"ms."<<endl<<endl;
string tr=to_string(tt);
string pr=to_string(tp);
string su=to_string(sum);
strcpy (logData, "Main server sends information to client: transmission delay ");
strcat (logData ,tr.c_str());
strcat (logData, "ms, propagation delay ");
strcat (logData ,pr.c_str());
strcat (logData, "ms, and total delay ");
strcat (logData ,su.c_str());
strcat (logData, "ms.");
}