struct sockaddr_in
{
short sin_family;
unsigned short sin_port;
struct in_addr sin_addr;
char sin_zero[8];
};#if defined (WIN32)
#include <winsock2.h>
typedef int socklen_t;
#elif defined (linux)
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define closesocket(s) close(s)
typedef int SOCKET;
typedef struct sockaddr_in SOCKADDR_IN;
typedef struct sockaddr SOCKADDR;
#endif
#include <stdio.h>
#include <stdlib.h>
#define PORT 23
int main(void)
{
#if defined (WIN32)
WSADATA WSAData;
int erreur = WSAStartup(MAKEWORD(2,2), &WSAData);
#else
int erreur = 0;
#endif
SOCKET sock;
SOCKADDR_IN sin;
if(!erreur)
{
/* Création de la socket */
sock = socket(AF_INET, SOCK_STREAM, 0);
/* Configuration de la connexion */
sin.sin_addr.s_addr = inet_addr("127.0.0.1");
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
/* Si le client arrive à se connecter */
if(connect(sock, (SOCKADDR*)&sin, sizeof(sin)) != SOCKET_ERROR)
printf("Connexion à %s sur le port %d\n", inet_ntoa(sin.sin_addr), htons(sin.sin_port));
else
printf("Impossible de se connecter\n");
/* On ferme la socket précédemment ouverte */
closesocket(sock);
#if defined (WIN32)
WSACleanup();
#endif
}
return EXIT_SUCCESS;
}sock = socket(AF_INET, SOCK_STREAM, 0);#if defined (WIN32)
#include <winsock2.h>
typedef int socklen_t;
#elif defined (linux)
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define INVALID_SOCKET -1
#define SOCKET_ERROR -1
#define closesocket(s) close(s)
typedef int SOCKET;
typedef struct sockaddr_in SOCKADDR_IN;
typedef struct sockaddr SOCKADDR;
#endif
#include <stdio.h>
#include <stdlib.h>
#define PORT 23
int main(void)
{
#if defined (WIN32)
WSADATA WSAData;
int erreur = WSAStartup(MAKEWORD(2,2), &WSAData);
#else
int erreur = 0;
#endif
/* Socket et contexte d'adressage du serveur */
SOCKADDR_IN sin;
SOCKET sock;
socklen_t recsize = sizeof(sin);
/* Socket et contexte d'adressage du client */
SOCKADDR_IN csin;
SOCKET csock;
socklen_t crecsize = sizeof(csin);
int sock_err;
if(!erreur)
{
/* Création d'une socket */
sock = socket(AF_INET, SOCK_STREAM, 0);
/* Si la socket est valide */
if(sock != INVALID_SOCKET)
{
printf("La socket %d est maintenant ouverte en mode TCP/IP\n", sock);
/* Configuration */
sin.sin_addr.s_addr = htonl(INADDR_ANY); /* Adresse IP automatique */
sin.sin_family = AF_INET; /* Protocole familial (IP) */
sin.sin_port = htons(PORT); /* Listage du port */
sock_err = bind(sock, (SOCKADDR*)&sin, recsize);
/* Si la socket fonctionne */
if(sock_err != SOCKET_ERROR)
{
/* Démarrage du listage (mode server) */
sock_err = listen(sock, 5);
printf("Listage du port %d...\n", PORT);
/* Si la socket fonctionne */
if(sock_err != SOCKET_ERROR)
{
/* Attente pendant laquelle le client se connecte */
printf("Patientez pendant que le client se connecte sur le port %d...\n", PORT);
csock = accept(sock, (SOCKADDR*)&csin, &crecsize);
printf("Un client se connecte avec la socket %d de %s:%d\n", csock, inet_ntoa(csin.sin_addr), htons(csin.sin_port));
}
else
perror("listen");
}
else
perror("bind");
/* Fermeture de la socket client et de la socket serveur */
printf("Fermeture de la socket client\n");
closesocket(csock);
printf("Fermeture de la socket serveur\n");
closesocket(sock);
printf("Fermeture du serveur terminée\n");
}
else
perror("socket");
#if defined (WIN32)
WSACleanup();
#endif
}
return EXIT_SUCCESS;
}