用SendARP()获取对方的MAC地址

使用SendARP()函数，发送ARP请求，以获取对方的MAC地址。

/* sendarp.c 
 * Link with wsock32.lib and iphlpapi.lib 
 */
#pragma comment(lib,"iphlpapi.lib")
#pragma comment(lib,"wsock32.lib")
#include <winsock2.h>
#include <iphlpapi.h>
#include <stdio.h>

void usage(char *pname)
{
	printf("Usage: %s [options] ip-address\n", pname);
	printf("\t -h \t\thelp\n");
	printf("\t -s src-ip \tsource IP address\n");
	exit(1);
}

int __cdecl main(int argc, char **argv)
{
    DWORD dwRetVal = 0;
    IPAddr DestIp = 0;
    IPAddr SrcIp = 0; /* default for src ip */
	ULONG MacAddr[2] = {0}; /* for 6-byte hardware addresses */
    ULONG PhysAddrLen = 6; /* default to length of six bytes */

    char *DestIpString = NULL;
    char *SrcIpString = NULL;

    BYTE *bPhysAddr;
    int i;

    if (argc > 1) 
	{
        for (i = 1; i < argc; i++) 
		{
            if ((argv[i][0] == '-') || (argv[i][0] == '/')) 
			{
                switch (tolower(argv[i][1])) 
				{
                case 's':
                    SrcIpString = argv[++i];
                    SrcIp = inet_addr(SrcIpString);
                    break;
                case 'h':
                default:
                    usage(argv[0]);
                    break;
                }/* end switch */
            } 
			else
			{
                DestIpString = argv[i];
			}
        }/* end for */
    }
	else
	{
        usage(argv[0]);
	}
    if (DestIpString == NULL || DestIpString[0] == '\0')
	{
        usage(argv[0]);
	}
    DestIp = inet_addr(DestIpString);
	printf("Sending ARP request for IP address: %s\n", DestIpString);
	PhysAddrLen = sizeof(MacAddr);
	memset(&MacAddr, 0xff, sizeof (MacAddr));
    dwRetVal = SendARP(DestIp, SrcIp, &MacAddr, &PhysAddrLen);
    if (dwRetVal == NO_ERROR) 
	{
        bPhysAddr = (BYTE *) &MacAddr;
        if (PhysAddrLen) 
		{
            for (i = 0; i < (int) PhysAddrLen; i++) 
			{
                if (i == (PhysAddrLen - 1))
				{
                    printf("%.2X\n", (int) bPhysAddr[i]);
				}
                else
				{
                    printf("%.2X-", (int) bPhysAddr[i]);
				}
            }
        }
		else
		{
            printf("Warning: SendArp completed successfully, but returned length=0\n");
		}
    } 
	else 
	{
        printf("Error: SendArp failed with error: %d", dwRetVal);
        switch (dwRetVal)
		{
        case ERROR_GEN_FAILURE:
            printf(" (ERROR_GEN_FAILURE)\n");
            break;
        case ERROR_INVALID_PARAMETER:
            printf(" (ERROR_INVALID_PARAMETER)\n");
            break;
        case ERROR_INVALID_USER_BUFFER:
            printf(" (ERROR_INVALID_USER_BUFFER)\n");
            break;
        case ERROR_BAD_NET_NAME:
            printf(" (ERROR_GEN_FAILURE)\n");
            break;
        case ERROR_BUFFER_OVERFLOW:
            printf(" (ERROR_BUFFER_OVERFLOW)\n");
            break;
        case ERROR_NOT_FOUND:
            printf(" (ERROR_NOT_FOUND)\n");
            break;
        default:
            printf("\n");
            break;
        }
    }
    return 0;
}

           

经测试，无法获取127.0.0.1的MAC地址，可以获取正常IP的MAC地址：

E:\>sendarp 172.16.27.38

Sending ARP request for IP address: 172.16.27.38

E8-9A-8F-F9-3C-D2