获取指定IP的MAC地址

#include "stdafx.h"
#include <WinSock2.h>
#include <Iphlpapi.h>
#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;
}