socket_res = socket(AF_INET, SOCK_STREAM, 0);
if(socket_res < 0){
	printf("Can't create socket\n");
	return -1;
}

server.sin_family = AF_INET;
server.sin_addr.s_addr = inet_addr("127.0.0.1"); //localhost
server.sin_port = htons(42742); //port sur lequel tourne server