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comparison src/main.c @ 2:052cf5cf100a

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handle server shutdown and print server time
author Dennis <dennisconcepcionmartin@gmail.com>
date Mon, 17 Jul 2023 19:11:53 +0100
parents 58952f1fb8da
children 691358f944e8
comparison
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1:58952f1fb8da 2:052cf5cf100a
1 #include <signal.h>
1 #include <stdio.h> 2 #include <stdio.h>
2 #include <stdlib.h> 3 #include <stdlib.h>
3 #include <string.h> 4 #include <string.h>
4 #include <sys/types.h> 5 #include <sys/types.h>
5 #include <sys/socket.h> 6 #include <sys/socket.h>
6 #include <netinet/in.h> 7 #include <netinet/in.h>
7 #include <arpa/inet.h> 8 #include <arpa/inet.h>
9 #include <time.h>
10
11
12 int socketfd;
13
14
15 void sig_handler(int sig_num) {
16 if (sig_num == 2) {
17 printf("\nClosing socket\n");
18 shutdown(socketfd, 2);
19 exit(0);
20 }
21 }
8 22
9 23
10 int main() { 24 int main() {
11 int socketfd = socket(AF_INET, SOCK_STREAM, 0); 25 signal(SIGINT, sig_handler);
26 socketfd = socket(AF_INET, SOCK_STREAM, 0);
12 27
13 if (socketfd == -1) { 28 if (socketfd == -1) {
14 printf("Socket creation failed\n"); 29 perror("socket: ");
15 exit(1); 30 exit(1);
16 } 31 }
17 32
18 struct sockaddr_in sin; 33 struct sockaddr_in sin;
19 memset(&sin, 0, sizeof(sin)); 34 memset(&sin, 0, sizeof(sin));
20 sin.sin_family = AF_INET; 35 sin.sin_family = AF_INET;
21 sin.sin_addr.s_addr = inet_addr("127.0.0.1"); 36 sin.sin_addr.s_addr = inet_addr("127.0.0.1");
22 sin.sin_port = htons(5050); 37 sin.sin_port = htons(5050);
23 38
24 if (bind(socketfd, (struct sockaddr*)&sin, sizeof(sin)) == -1) { 39 if (bind(socketfd, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
25 printf("Socket binding failed\n"); 40 perror("bind: ");
41 exit(1);
26 } 42 }
27 43
28 //if (connect(socketfd, (struct sockaddr*)&sin, sizeof(sin) == -1)) {
29 //printf("Socket connection failed\n");
30 //}
31
32 if (listen(socketfd, 10) == -1) { 44 if (listen(socketfd, 10) == -1) {
33 printf("Listen failed\n"); 45 perror("listen: ");
46 exit(1);
34 } 47 }
35 48
36 char sendBuff[50] = "Hello world\n"; 49 printf("Waiting for connections...\n");
50 char send_buffer[100];
37 51
38 while (1) { 52 while (1) {
39 int connfd = accept(socketfd, (struct sockaddr*)NULL, NULL); 53 int connfd = accept(socketfd, (struct sockaddr*)NULL, NULL);
40 send(connfd, sendBuff, sizeof(sendBuff), 0); 54
55 if (connfd == -1) {
56 perror("accept: \n");
57 exit(1);
58 }
59
60 time_t now = time(NULL);
61 snprintf(send_buffer, sizeof(send_buffer), "Server time: %s\n", ctime(&now));
62 send(connfd, send_buffer, sizeof(send_buffer), 0);
41 shutdown(connfd, 2); 63 shutdown(connfd, 2);
42 } 64 }
43 65
44
45 return 0; 66 return 0;
46 } 67 }