Client - Serveur TCP

Serveur

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <signal.h>

void fin (int i);
void appli(int no_client_socket);
char buffer[512];
int ma_socket;

void main ( void )
{
int client_socket;
struct sockaddr_in mon_address, client_address;
int mon_address_longueur, lg;

bzero(&mon_address,sizeof(mon_address));
mon_address.sin_port = htons(30000);
mon_address.sin_family = AF_INET;
mon_address.sin_addr.s_addr = htonl(INADDR_ANY);

/* creation de socket */
if ((ma_socket = socket(AF_INET,SOCK_STREAM,0))== -1)
{
  printf("ca chie avec la creation\n");
  exit(0);
}
signal(SIGINT,fin);
/* bind serveur - socket */
bind(ma_socket,(struct sockaddr *)&mon_address,sizeof(mon_address));

/* ecoute sur la socket */
listen(ma_socket,5);

/* accept la connexion */
mon_address_longueur = sizeof(client_address);
while(1)
{
  client_socket = accept(ma_socket,
                         (struct sockaddr *)&client_address,
                         &mon_address_longueur);

  if (fork() == 0)
  {
    close(ma_socket);

    lg = read(client_socket,buffer, 512);
    printf("le serveur a recu: %s\n",buffer);
    sprintf(buffer,"%s du serveur",buffer);
    write(client_socket,buffer, 512);
    shutdown(client_socket,2);
    close(client_socket);
    exit(0);
  }
}
shutdown(ma_socket,2);
close(ma_socket);
}


void appli(int no_client_socket)
{
  printf("ici le serveur\n");
}

void fin(int i)
{
shutdown(ma_socket,2);
close(ma_socket);
}

Client

#include <stdio.h>
#include <errno.h>
#include <signal.h>

#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>

#define SERVEURNAME "127.0.0.1"

int to_server_socket = -1;

void main ( void )
{

char *server_name = SERVEURNAME;
struct sockaddr_in serverSockAddr;
struct hostent *serverHostEnt;
long hostAddr;
long status;
char buffer[512];

bzero(&serverSockAddr,sizeof(serverSockAddr));
hostAddr = inet_addr(SERVEURNAME);
if ( (long)hostAddr != (long)-1)
  bcopy(&hostAddr,&serverSockAddr.sin_addr,sizeof(hostAddr));
else
{
  serverHostEnt = gethostbyname(SERVEURNAME);
  if (serverHostEnt == NULL)
  {
    printf("ca chie gethost\n");
    exit(0);
  }
  bcopy(serverHostEnt->h_addr,&serverSockAddr.sin_addr,serverHostEnt->h_length);
}
serverSockAddr.sin_port = htons(30000);
serverSockAddr.sin_family = AF_INET;

/* creation de la socket */
if ( (to_server_socket = socket(AF_INET,SOCK_STREAM,0)) < 0)
{
  printf("ca chie creation socket client\n");
  exit(0);
}
/* requete de connexion */
if(connect( to_server_socket,
            (struct sockaddr *)&serverSockAddr,
            sizeof(serverSockAddr)) < 0 )
{
  printf("ca chie demande de connection\n");
  exit(0);
}
/* envoie de donne et reception */
write(to_server_socket,"Toto",4);
read(to_server_socket,buffer,512);
printf(buffer);
/* fermeture de la connection */
shutdown(to_server_socket,2);
close(to_server_socket);
}