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| #if defined (WIN32)
#include <winsock2.h>
#pragma comment (lib, "Ws2_32.lib")
typedef int socklen_t;
#else
#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>
#include <string.h>
#define PORT 6666
int main(int argc, char *argv[])
{
#if defined (WIN32)
WSADATA WSAData;
int erreur = WSAStartup(MAKEWORD(2,2), &WSAData);
#else
int erreur = 0;
#endif
SOCKET sock;
SOCKADDR_IN sin;
SOCKADDR_IN SenderAddr;
int SenderAddrSize = sizeof (SenderAddr);
int broadcastPermission; /* Socket opt to set permission to broadcast */
printf("Usage: %s <ip cible> <textesansespace>\n", argv[0]);
if(!erreur && argc > 2)
{
char buff[255]; // 'quit' stop le serveur
int iResult;
strcpy(buff, argv[2]);
/* Création de la socket */
sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
broadcastPermission = 1;
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (void *) &broadcastPermission, sizeof(broadcastPermission)) < 0)
{
printf("setsockopt() failed\n");
closesocket(sock);
#if defined (WIN32)
WSACleanup();
#endif
return 0;
}
/* Configuration de la connexion */
sin.sin_addr.s_addr = inet_addr(argv[1]);
// 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 */
printf("Sending a datagram to the receiver...\n");
iResult = sendto(sock, buff, strlen(buff)+1, 0, (SOCKADDR *) & sin, sizeof (sin));
if (iResult != SOCKET_ERROR)
{
int i;
printf("sendto: %d octet envoyé\n", iResult);
//pour recevoir une réponse, le client doit se transfromer en serveur et attendre que le serveur intiial se conecte a lui:
for (i = 0; i < 2; i++)
{
memset(buff, 0, 255);
iResult = recvfrom(sock, buff, 255, 0, (SOCKADDR *) & SenderAddr, &SenderAddrSize); // fonction bloquante!
if (iResult == SOCKET_ERROR)
printf("recvfrom failed \n");
else
printf("%d - reponse de '%s' : %d octets : '%s'\n", i, inet_ntoa(SenderAddr.sin_addr), iResult, buff);
}
}
else
printf("erreur sendto!\n");
/* On ferme la socket précédemment ouverte */
closesocket(sock);
#if defined (WIN32)
WSACleanup();
#endif
}
return EXIT_SUCCESS;
} |
recherche d'une @ IP à parti d'une @ MAC
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