slacky.eu

Codice: Seleziona tutto

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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


int main (int argc, char* const argv[]){
  
  int socket_fd, client_socket_fd;
  struct sockaddr_in sname; 
  struct sockaddr_in cname;
  socklen_t client_name_len=0;
  long flags;
  char messaggio[7]={'c','i','a','o',0,10,13};

  socket_fd = socket (AF_INET, SOCK_STREAM, 0);
  
  memset(&sname,0,sizeof(struct sockaddr_in));
  sname.sin_family = AF_INET;
  sname.sin_port = htons(5002);
  sname.sin_addr.s_addr = INADDR_ANY; //inet_addr("192.168.1.100"); 
  
  
  if (-1 == bind (socket_fd,(struct sockaddr *) &sname, sizeof(sname))){
  	perror("bind");
	return EXIT_FAILURE;
	}
  
  if (-1 == listen (socket_fd, 5)){
  	perror("listen");
	return EXIT_FAILURE;
	}
  
	while(1){
	 	client_name_len = (socklen_t) (sizeof(struct sockaddr_in));
  		client_socket_fd = accept (socket_fd, (struct sockaddr *) &cname, &client_name_len);
			if (client_socket_fd >= 0){
				flags = fcntl (client_socket_fd, F_GETFL);
					if (flags >= 0 && (fcntl (client_socket_fd, F_SETFL, flags | O_NONBLOCK) == -1)){
						close(client_socket_fd);
						perror("accept");
					}
			}
		
		printf("Ho accettato una connessione da %s\n", inet_ntoa(cname.sin_addr));
		
		if(!fork()){
			read(client_socket_fd,messaggio,7);
			if(send(client_socket_fd,messaggio,7,0) == -1 ) perror("send");
			
  			close (client_socket_fd);
			return EXIT_SUCCESS;
  		}
		close (client_socket_fd);
		while(waitpid(-1,NULL,WNOHANG) > 0);
	}
}

Codice: Seleziona tutto

/***************************************************************************
 *   Copyright (C) 2006 by Meritil @ Segreteria De Paolis RE s.r.l.   *
 *   fdepaolis@capoccione.depaolisre.it   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/


#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#define PORT 5002


void sigchld_handler(int s){
	while(waitpid(-1, NULL, WNOHANG) > 0 );
}

int main (int argc, char* const argv[]){
  
  int s_fd, c_fd, sin_size, yes=1;
  struct sockaddr_in server; 
  struct sockaddr_in client;
  struct sigaction sa;


	s_fd = socket(PF_INET, SOCK_STREAM, 0);
	if(s_fd==-1) {perror("socket"); return EXIT_FAILURE;}
	
	if(setsockopt(s_fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1 ){
		perror("setsockopt");
		return EXIT_FAILURE;
	}
	
		server.sin_family = AF_INET;
		server.sin_port = htons(PORT);
		server.sin_addr.s_addr = htonl(INADDR_ANY);
		memset(&(server.sin_zero), '\0', 8);

	if(bind(s_fd, (struct sockaddr *) &server, sizeof(struct sockaddr)) == -1){
		perror("bind");
		return EXIT_FAILURE;
	}

	if(listen(s_fd, 5) == -1){
		perror("listen");
		return EXIT_FAILURE;
	}

	sa.sa_handler = sigchld_handler;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;
	if(sigaction(SIGCHLD, &sa, NULL) == -1) {
		perror("sigaction");
		return EXIT_FAILURE;
	}

	while(1){

			sin_size = sizeof(struct sockaddr_in);
			
			if((c_fd = accept(s_fd, (struct sockaddr * ) &client, &sin_size)) == -1 ){
				perror("accept");
				continue;
			}
			printf("Server: Ho accettato una connessione da %s\n", inet_ntoa(client.sin_addr));

			if(!fork()){
				close(s_fd);
				//Fate il vostro gioco da qui
				if(send(c_fd, "Ciao Maschio!\n", 14, 0) == -1) perror("send");
				//A qui!
				close(c_fd);
				return EXIT_SUCCESS;
			}
			close(c_fd);
	}
	
	return EXIT_SUCCESS;
}