How to make it accept multi-client connections?

[barramundi9]

Dear all:

How can I use fork() to create multiple client access and at the same time make the server echo back the strings to the clients? Any idea?

Thanks.

#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <unistd.h>

#define MAXLINE 4096 
#define SERV_PORT 3000 
#define LISTENQ 8 

int main (int argc, char **argv)
{
 int listenfd, connfd, n;
 socklen_t clilen;
 char buf[MAXLINE];
 struct sockaddr_in cliaddr, servaddr;
	
 listenfd = socket (AF_INET, SOCK_STREAM, 0);
	
 servaddr.sin_family = AF_INET;
 servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
 servaddr.sin_port = htons(SERV_PORT);
	
 bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
	
 listen(listenfd, LISTENQ);
	
 printf("%s\n","Server running...waiting for connections.");
	
 for ( ; ; ) {
		
  clilen = sizeof(cliaddr);
  connfd = accept(listenfd, (struct sockaddr *) &cliaddr, &clilen);
  printf("%s\n","Received request...");
				
  while ( (n = recv(connfd, buf, MAXLINE,0)) > 0)  {
   printf("%s","String received from and resent to the client:");
   puts(buf);
   send(connfd, buf, n, 0);
  }
			
 if (n < 0) {
  perror("Read error"); 
  exit(1);
 }
 close(connfd);
	
 }
 close(listenfd); 
}

[Barney McGrew]

Inter-process communication - Wikipedia, the free encyclopedia