#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 connecté */
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;
}
Les erreurs générées sont 9:
undefined reference to _socket@12
undefined reference to _WSAStartup@8
................... to _inet_addr@4
................... to htons@64