C++ 通过IP地址获取MAC地址

#include 
#include 
#include 
#include 
#pragma warning(disable:4996)

#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "iphlpapi.lib")

std::string getMacAddress(const std::string& ipAddress) {
    // 初始化Winsock
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cerr << "WSAStartup failed." << std::endl;
        return "";
    }

    // 将IP地址转换为ULONG格式
    ULONG destIp = inet_addr(ipAddress.c_str());
    if (destIp == INADDR_NONE) {
        std::cerr << "Invalid IP address." << std::endl;
        WSACleanup();
        return "";
    }

    // 准备接收MAC地址的缓冲区
    ULONG macAddr[2];
    ULONG macAddrLen = 6;
    memset(macAddr, 0xff, sizeof(macAddr));

    // 调用SendARP函数获取MAC地址
    DWORD ret = SendARP(destIp, 0, macAddr, &macAddrLen);
    if (ret == NO_ERROR) {
        // 将MAC地址转换为字符串格式
        BYTE* macBytes = (BYTE*)macAddr;
        char macStr[18];
        sprintf_s(macStr, sizeof(macStr), "%02X:%02X:%02X:%02X:%02X:%02X",
            macBytes[0], macBytes[1], macBytes[2],
            macBytes[3], macBytes[4], macBytes[5]);
        WSACleanup();
        return std::string(macStr);
    }
    else {
        std::cerr << "Failed to get MAC address. Error code: " << ret << std::endl;
        WSACleanup();
        return "";
    }
}

int main() {
    std::string ipAddress;
    std::cout << "Enter IP address: ";
    std::cin >> ipAddress;

    std::string macAddress = getMacAddress(ipAddress);
    if (!macAddress.empty()) {
        std::cout << "MAC Address: " << macAddress << std::endl;
    }
    else {
        std::cout << "Could not retrieve MAC address." << std::endl;
    }

    return 0;
}