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

#define SERVER_PORT 5432
#define MAX_PENDING 5 
#define MAX_LINE 256 
    
int main() 
{ 
    struct sockaddr_in sin; 
    char buf[MAX_LINE]; 
    socklen_t len; 
    int s, new_s; 
    /* build address data structure */ 
    memset((char *)&sin, 0, sizeof(sin)); 
    sin.sin_family = AF_INET; 
    sin.sin_addr.s_addr = INADDR_ANY; 
    sin.sin_port = htons(SERVER_PORT);
    /* setup passive open */ 
    if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0) { 
	perror("simplex-talk: socket"); 
	exit(1); 
    } 
    if ((bind(s, (struct sockaddr *)&sin, sizeof(sin))) < 0) { 
	perror("simplex-talk: bind"); 
	exit(1); 
    } 
    listen(s, MAX_PENDING); 
    /* wait for connection, then receive and print text */ 
    while(1) { 
	/* set len to size of address struct */
	len = sizeof(sin);
	if ((new_s = accept(s, (struct sockaddr *)&sin, &len)) < 0){ 
	    perror("simplex-talk: accept"); 
	    exit(1); 
	} 
	while ((len = recv(new_s, buf, sizeof(buf), 0))) 
	    fputs(buf, stdout); 
	close(new_s); 
    } 
}