forked from chankeh/net-lenrning-reference
-
Notifications
You must be signed in to change notification settings - Fork 0
/
sock_IO_srv.c
79 lines (62 loc) · 1.76 KB
/
sock_IO_srv.c
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
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#define BUF_SIZE 1024
void error_handling(char *message);
int main(int argc, char *argv[]){
int serv_sock,clnt_sock;
char message[BUF_SIZE];
int str_len,i;
struct sockaddr_in serv_adr;
struct sockaddr_in clnt_adr;
socklen_t clnt_adr_sz;
FILE * readfp;
FILE * writefp;
if(argc != 2){
printf("Usage : %s <port>\n",argv[0]);
exit(1);
}
serv_sock = socket(PF_INET,SOCK_STREAM,0);
if(serv_sock == -1){
error_handling("socket() error");
}
memset(&serv_adr,0,sizeof(serv_adr));
serv_adr.sin_family=AF_INET;
serv_adr.sin_addr.s_addr=htonl(INADDR_ANY);
serv_adr.sin_port=htons(atoi(argv[1]));
if(bind(serv_sock,(struct sockaddr*)&serv_adr,sizeof(serv_adr)) == -1){
error_handling("bind() error");
}
if(listen(serv_sock,5) == -1){
error_handling("listen error");
}
clnt_adr_sz = sizeof(clnt_adr);
for(i=0;i<5;i++){
clnt_sock = accept(serv_sock,(struct sockaddr*)&clnt_adr,&clnt_adr_sz);
if(clnt_sock == -1){
error_handling("accept error");
}else{
printf("connected client %d %d\n",i+1,clnt_sock);
}
readfp = fdopen(clnt_sock,"r");
writefp = fdopen(clnt_sock,"w");
while(!feof(readfp)){
fgets(message,BUF_SIZE,readfp);
fputs(message,writefp);
fflush(writefp);
}
printf("disconnected client %d \n",clnt_sock);
fclose(readfp);
fclose(writefp);
}
close(serv_sock);
return 0;
}
void error_handling(char *message){
fputs(message,stderr);
fputs("\n",stderr);
exit(1);
}