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tcp_forkserver.c
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78 lines (65 loc) · 1.62 KB
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/* tcp_forkserver.c
* Server for INET Domain(TCP) multi client (use fork)
* http://www.ueda.info.waseda.ac.jp/~toyama/network/fork.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#define PORT 12345
void p_err(char *msg)
{
perror(msg);
exit(EXIT_FAILURE);
}
int main(int argc, char *argv[])
{
int sockfd, new_sockfd;
int len;
struct sockaddr_in s_addr;
struct sockaddr_in c_addr;
char buf[1024];
int pid;
printf("usage: %s\n", argv[0]);
/* make socket */
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
p_err("socket");
printf("socket: Success\n");
/* clear s_addr */
bzero((char *)&s_addr, sizeof(s_addr));
/* set socket */
s_addr.sin_family = AF_INET;
s_addr.sin_addr.s_addr = INADDR_ANY;
s_addr.sin_port = htons(PORT);
/* bind address */
if((bind(sockfd, (struct sockaddr *)&s_addr, sizeof(s_addr))) < 0)
p_err("bind");
printf("bind: Success\n");
/* listen socket */
if(listen(sockfd, 1) < 0)
p_err("listen");
printf("listen: Success\n");
len = sizeof(c_addr);
for(;;) {
if((new_sockfd = accept(sockfd, (struct sockaddr *)&c_addr, &len)) < 0)
p_err("accept");
printf("accept: Success\n");
if((pid = fork()) < 0) {
p_err("fork");
} else if (pid == 0) {
printf("fork: Success\n");
close(sockfd);
while(read(new_sockfd, buf, 1024)) {
printf("--receive-> %s", buf);
write(new_sockfd, buf, 1024);
printf("<-send to-- %s", buf);
}
exit(0);
}
close(new_sockfd);
}
return(0);
}