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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")
#include <pcap.h>
#pragma comment(lib, "wpcap.lib")
typedef struct EthernetHeader EthernetHeader;
typedef struct IPHEADER IPHEADER;
typedef struct enteteTCP enteteTCP;
typedef struct entetePseudoTCP entetePseudoTCP;
#pragma pack(1)
struct EthernetHeader
{
unsigned char Mac_destin1[2];
unsigned char Mac_destin2[2];
unsigned char Mac_destin3[2];
unsigned char Mac_source1[2];
unsigned char Mac_source2[2];
unsigned char Mac_source3[2];
unsigned short int type_Ether;
};
#pragma pack()
#pragma pack(1)
struct IPHEADER
{
unsigned char version;
unsigned char typServ;
unsigned short int tot_len;
unsigned short int id;
unsigned char flagOff1 ;
unsigned char offset ;
unsigned char ttl;
unsigned char protocol; // a mettre le numero de tcp
unsigned short int somme; //modded
unsigned long int ip_source;
unsigned long int ip_dest;
};
#pragma pack()
#pragma pack(1)
struct enteteTCP
{
unsigned short int PortSrc;
unsigned short int PortDest;
unsigned int NumSeq;
unsigned int NumAcK;
/*
unsigned short int Taill:4 , Reserv:6 ; //modded
unsigned short int reserved2:2; */
/*
unsigned short int ns :1;
unsigned short int reserved_part1:3; */
unsigned short int data_offset :8;
unsigned short int flag_fin:1;
unsigned short int flag_syn:1;
unsigned short int flag_rst:1;
unsigned short int flag_psh:1;
unsigned short int flag_ack:1;
unsigned short int flag_urg:1;
unsigned short int ecn :1; //ECN-Echo Flag
unsigned short int cwr :1; //Congestion Window Reduced Flag
/*
unsigned char TaillReserv;
unsigned char EcnFlag;
*/
//
unsigned short int Fenetre;
unsigned short int somme;
unsigned short int PointDonneUrg;
//facultatif (flag 'SYN' y'a des options spécifique)
unsigned char option1Mss1;
unsigned char option1Mss2;
unsigned short int option1Mss3;
unsigned char option2;
unsigned char option3;
unsigned char optionSack1;
unsigned char optionSack2;
};
#pragma pack()
#pragma pack(1)
struct entetePseudoTCP
{
unsigned long int IPSrc;
unsigned long int IPDest;
unsigned char Reserv;
unsigned char Ip_proto;
unsigned short int totalT;
};
#pragma pack()
char errbuf[PCAP_ERRBUF_SIZE];
pcap_if_t * alldevs;
pcap_t *adhandle;
EthernetHeader ethernet;
IPHEADER ip;
enteteTCP tcp;
entetePseudoTCP PseudoTCP;
WSADATA WSAData; // global
SOCKET monsock;
DWORD sockopt = TRUE;
SOCKADDR_IN sin;
char * buffer= NULL;
char Mac_destin01[2] = { '\x52', '\x74' } ;
char Mac_destin02[2] = { '\x00', '\x12' } ;
char Mac_destin03[2] = { '\x36', '\x02' } ;
char Mac_source01[2] = { '\x02', '\x00' } ;
char Mac_source02[2] = { '\x67', '\xa6' } ;
char Mac_source03[2] = { '\x12', '\x9D' } ;
unsigned short int global_size = 0;
void RemplissageChar( char * var1 , char * var2 );
USHORT checksum(void * lpData, size_t size);
int main(void)
{
global_size = sizeof(IPHEADER) + sizeof(enteteTCP) ;//+ sizeof(entetePseudoTCP);
buffer = malloc(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);//global_size);
ip.id = htons(52);
ip.flagOff1 = 0x40;
ip.offset = 0x00;
ip.ttl = 128;
ip.protocol = 6;
ip.somme = 0x0000; //modded
ip.ip_source = inet_addr("10.0.2.15");
ip.ip_dest = inet_addr("xx.Xx.xx.Xx");
//ip.somme = checksum( &ip, sizeof(ip) );
tcp.PortSrc = htons(1479);
tcp.PortDest = htons(80);
tcp.NumSeq = htonl(0xb52f4972);//htonl(1);
tcp.NumAcK = htonl(0);
/*
tcp.TaillReserv = 0x70;
tcp.EcnFlag = 0x02;
tcp.Taill = 28;
tcp.Reserv = 0; //modded
tcp.reserved2 = 0; */
//tcp.ns =;
//tcp.reserved_part1 =0;
tcp.data_offset =0x70;
tcp.flag_fin = 0;
tcp.flag_syn = 1;
tcp.flag_rst = 0;
tcp.flag_psh = 0;
tcp.flag_ack = 0;
tcp.flag_urg = 0;
tcp.ecn = 0;
tcp.cwr = 0;
tcp.Fenetre = htons(64240);
tcp.PointDonneUrg = 0x00 ;
tcp.somme = 0x00;
tcp.option1Mss1 = 0x02;
tcp.option1Mss2 = 0x04;
tcp.option1Mss3 = 0xb405;
tcp.option2 = 1;
tcp.option3 = 1;
tcp.optionSack1 = 0x04;
tcp.optionSack2 = 0x02;
PseudoTCP.IPSrc = inet_addr("10.0.2.15");
PseudoTCP.IPDest = inet_addr("xx.Xx.xx.Xx");
PseudoTCP.Reserv = 0;
PseudoTCP.Ip_proto = 6;
PseudoTCP.totalT = htons(sizeof(tcp)+sizeof(PseudoTCP));
tcp.somme = htons (checksum(&tcp,sizeof(tcp)+sizeof(PseudoTCP) ));
//memcpy(buffer, ðernet, sizeof(ethernet));
memcpy(buffer , &ip , sizeof(ip) );
memcpy(buffer + sizeof(ip) , &tcp , sizeof(tcp));
//memcpy(buffer + sizeof(ip) + sizeof(tcp), &PseudoTCP, sizeof(PseudoTCP));
sin.sin_addr.s_addr = inet_addr("xx.Xx.xx.Xx"); //parametre de connection destinataire
sin.sin_family = AF_INET; //parametre de connection
sin.sin_port = htons(80); //parametre de connection
if( sendto(monsock, buffer, global_size, 0, (SOCKADDR *)&sin, sizeof(sin)) == SOCKET_ERROR)
printf("La fonction sendto a echoue: %ld \n", WSAGetLastError());
else
printf("Message envoye !\n");
free(buffer);
closesocket(monsock);
WSACleanup();
return 0;
}
void RemplissageChar( char * var1 , char * var2 )
{
int i ;
int Longueur = 0;
Longueur = sizeof(var1);
for ( i = 0 ; i < Longueur ; i++ )
{
var2[i] = var1[i] ;
if(Longueur == i )
break;
}
}
USHORT 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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