Programming

client.c

int main (int argc, char *argv[]) {

int socketclient,rc;
int port, retour;
struct sockaddr_in localAddr, servAddr;
struct hostent *h;
char adresseserveurip[32];
char buffer[BUFFER_TAILLE];

printf("Entrez l'adresse IP ou le nom du serveur :");
scanf("%s", adresseserveurip);
printf(" port :");
scanf("%d", &port);


h = gethostbyname(adresseserveurip);
if(h==NULL) {
printf("%s: serveur inconnu '%s'\n",argv[0],adresseserveurip);
exit(1);
}


servAddr.sin_family = h->h_addrtype;
memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length);
servAddr.sin_port = htons(port);


socketclient = socket(AF_INET, SOCK_STREAM, 0);
if(socketclient<0) {
perror("Probleme de creation de socket\n ");
exit(1);
}
//Connexion au serveur
rc = connect(socketclient, (struct sockaddr *) &servAddr, sizeof(servAddr));
if(rc < 0)
{
printf("Probleme de connexion\n");
exit(1);
}
retour = read (socketclient, buffer, 32);
buffer[32] = '\0';
printf("\nMessage :%s. Nombre de caracteres lus = %d\n", buffer, retour);
close (socketclient); // Fermeture de la socket
return 0;
}

server.c

int creer_socket_serveur(int port)



{
int listen_fd;
struct sockaddr_in sin;


if ((listen_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) exit(1);


sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sin.sin_addr.s_addr = INADDR_ANY;


if (bind(listen_fd, (struct sockaddr *)&sin, sizeof (sin)) == -1) exit(1);


listen(listen_fd, 5);

return (listen_fd);
}



main (int argc, char *argv[])
{
int port, so, client_sin_len, nb, socketserveur;
struct sockaddr_in client_sin;
char buffer[BUFFER_TAILLE]="Ceci est un exemple de socket!!!";

port=1111;

socketserveur = creer_socket_serveur(port); //Creation du serveur et socket
printf("Serveur pret ... En attente de requetes ...\n");

client_sin_len = sizeof (client_sin);
so = accept(socketserveur, (struct sockaddr *)&client_sin, &client_sin_len);
if (so == -1)
{
printf ("Probleme de creation d'une socket de traitement\n");
exit (1);
}

nb = write(so, buffer, sizeof (buffer));
printf("Transmission effectuee. Nombre de caracteres transmis = %d\n", nb);
close (so);
close(socketserveur);
exit (0);
}