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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#pragma comment(lib, "ws2_32.lib")
typedef struct IPHEADER IPHEADER;
typedef struct UDPHEADER UDPHEADER;
typedef struct DnsHeader DnsHeader;
#pragma pack(1)
struct IPHEADER
{
unsigned char version;
unsigned char typServ;
unsigned short int tot_len;
unsigned short int id;
unsigned short int offset ;
unsigned char ttl;
unsigned char protocol;
unsigned short int somme;
unsigned long int ip_source;
unsigned long int ip_dest;
};
#pragma pack()
#pragma pack(1)
struct UDPHEADER
{
unsigned short int PortSrce;
unsigned short int PortDest;
unsigned short int taillePckt;
unsigned short int SommeContr;
};
#pragma pack()
#pragma pack(1)
struct DnsHeader
{
unsigned short int IDdns;
unsigned short int flag;
unsigned short int QuestDNS;
unsigned short int ReponDNS;
unsigned short int Author;
unsigned short int Addit;
unsigned char un[13] ;
unsigned short int TypeRecord;
unsigned short int ClassRecord;
};
#pragma pack()
WSADATA WSAData;
SOCKADDR_IN sock, recv3;
SOCKET monsock;
DWORD sockopt = TRUE;
IPHEADER ip;
UDPHEADER udp;
DnsHeader dns;
char * buffer= NULL;
char * buffer2= NULL;
char NameDnS[13] = { 03, 0x77, 0x77, 0x77, 04, 0x6c, 0x69, 0x66, 0x6c, 02, 0x66, 0x72, 00 }; //= www.lifl.fr
unsigned short int global_size = 0, taille_udp = 0 , taille_dns_req = 0, taille_udpDns = 0;
int i , o ;
unsigned short checksum(void * lpData, size_t size);
int main(void)
{
global_size = sizeof(IPHEADER) + sizeof(UDPHEADER) + sizeof(DnsHeader); // + sizeof(DnsQuery) ;
taille_udp = sizeof(UDPHEADER);
taille_udpDns = sizeof(UDPHEADER) + sizeof(DnsHeader);
taille_dns_req = sizeof(DnsHeader);
buffer = malloc(global_size);
printf(" taille global_size = %d \n ", global_size);
if(WSAStartup(MAKEWORD(2,0), &WSAData) != 0 )
{
printf("\n WSAstartup a echoué \n");
printf("l'Erreur wsa ==> : %ld \n", WSAGetLastError());
return -1;
}
monsock = socket(AF_INET,SOCK_RAW,IPPROTO_RAW);
if(monsock == INVALID_SOCKET )
{
printf("\n Erreur de creation de la socket ! \n ");
printf("l'Erreur wsa ==> : %ld \n", WSAGetLastError());
return -1;
}
if( setsockopt( monsock , IPPROTO_IP , IP_HDRINCL,(char *)&sockopt, sizeof(sockopt) ) == SOCKET_ERROR )
{
printf(" \n erreur detecté pour mise en place de l'option sur la socket \n ");
printf("l'Erreur wsa ==> : %ld \n", WSAGetLastError());
return -1;
}
ip.version = 69;
ip.typServ = 0;
ip.tot_len = htons(global_size);
ip.id = htons(0x7c42);
ip.offset = 0;
ip.ttl = 228;
ip.protocol = IPPROTO_UDP;
ip.ip_source = inet_addr("10.0.2.15"); // ip VM : 10.0.2.15 en nat
ip.ip_dest = inet_addr("192.168.1.1"); //ou ip serv dns 8.8.8.8 (google public)
ip.somme = checksum(&ip, sizeof(ip));
udp.PortSrce = htons(2336);
udp.PortDest = htons(53);
udp.taillePckt = htons(taille_udpDns);
udp.SommeContr = checksum(&udp, sizeof(udp));
dns.IDdns = htons(03);
dns.flag = htons(0x0100);
dns.QuestDNS =htons(1) ;
dns.ReponDNS =htons(0) ;
dns.Author =htons(0);
dns.Addit =htons(0) ;
for(i=0; i<= sizeof(NameDnS); i++)
{
dns.un[i] = NameDnS[i];
}
dns.TypeRecord = htons(1);
dns.ClassRecord = htons(1);
sock.sin_family = AF_INET;
sock.sin_addr.s_addr = inet_addr("192.168.1.1"); // dest
sock.sin_port = htons(2098);
memcpy(buffer, &ip, sizeof(ip));
memcpy(buffer + sizeof(ip), &udp , sizeof(udp) );
memcpy(buffer + sizeof(ip) + sizeof(udp) , &dns , sizeof(dns) );
if( sendto(monsock, buffer, global_size, 0, (SOCKADDR *)&sock, sizeof(sock)) == SOCKET_ERROR)
printf("La fonction sendto a echoue: %ld \n", WSAGetLastError());
else
printf("Message envoye !\n");
Sleep(1000);
free(buffer);
closesocket(monsock);
WSACleanup();
return 0;
}
unsigned short checksum(void * lpData, size_t size)
{
USHORT * t = lpData;
DWORD somme = 0;
size_t i, n = size / sizeof(USHORT);
for(i = 0; i < n; i++)
somme += t[i];
if (size % 2)
{
UCHAR * u = lpData;
somme += u[size - 1];
}
while (HIWORD(somme))
somme = HIWORD(somme) + LOWORD(somme);
return LOWORD(~somme);
} |
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