获取指定IP的MAC地址

#include "stdafx.h"
#include
#include
#pragma comment(lib , "IpHlpApi.lib")
#pragma comment(lib , "WS2_32.lib")
int main(int argc,char * argv[])
{
 int iReturn;
 DWORD dwIP;
 BYTE byMAC[6];
 DWORD dwLen;
 WSADATA WsaData;
 WSAStartup(MAKEWORD(2, 0), &WsaData);
 __try 
 {
  printf("IP2MAC Ver 1.0 -- Get MAC address from IP address though ARP request./n/n");
  if (argc != 2)
  {
   printf("Usage: %s /n", argv[0]);
   __leave;
  }
  dwIP = inet_addr(argv[1]);
  if (dwIP == INADDR_NONE)
  {
   printf("Invalid IP address: %s./n", argv[1]);
   __leave;
  }
  // 发送ARP查询包获得 MAC 地址
  dwLen = 6;
  iReturn = SendARP(dwIP, 0, (PULONG) &byMAC, &dwLen);
  if (iReturn != NO_ERROR)
  {
   printf("Error: Send ARP request. /nBe sure that connectting to %s need no gateway./n", argv[1]);
   __leave;
  }
  printf("%.2X-%.2X-%.2X-%.2X-%.2X-%.2X/n",
   byMAC[0],
   byMAC[1],
   byMAC[2],
   byMAC[3],
   byMAC[4],
   byMAC[5]);
 }
 __finally
 {
  WSACleanup();
 }
 return 0;
}