windows c++ 根据ip地址获取mac地址

在Windows C语言中，可以使用Winsock API来获取本地计算机的IP地址和MAC地址。

以下是一个示例代码，它使用GetAdaptersAddresses函数来获取所有网络适配器的信息，包括IP地址和MAC地址：

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include <iphlpapi.h>
#include <ws2tcpip.h>

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

int main()
{
    // 初始化Winsock库
    WSADATA wsaData;
    int err = WSAStartup(MAKEWORD(2, 2), &wsaData);
    if (err != 0) {
        printf("WSAStartup failed with error: %d\n", err);
        return 1;
    }

    // 获取所有网络适配器的信息
    PIP_ADAPTER_ADDRESSES pAddresses = NULL;
    ULONG outBufLen = 0;
    ULONG flags = GAA_FLAG_INCLUDE_PREFIX | GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER;
    DWORD ret = GetAdaptersAddresses(AF_UNSPEC, flags, NULL, NULL, &outBufLen);
    if (ret == ERROR_BUFFER_OVERFLOW) {
        pAddresses = (IP_ADAPTER_ADDRESSES*)malloc(outBufLen);
        ret = GetAdaptersAddresses(AF_UNSPEC, flags, NULL, pAddresses, &outBufLen);
    }

    // 遍历所有网络适配器
    if (ret == NO_ERROR) {
        PIP_ADAPTER_ADDRESSES pCurrAddresses = pAddresses;
        while (pCurrAddresses) {
            // 输出适配器名称
            printf("Adapter name: %ws\n", pCurrAddresses->FriendlyName);

            // 遍历IP地址列表
            PIP_ADAPTER_UNICAST_ADDRESS pUnicast = pCurrAddresses->FirstUnicastAddress;
            while (pUnicast) {
                // 输出IP地址和掩码
                char szIP[64], szMask[64];
                DWORD dwIP = pUnicast->Address.lpSockaddr->sa_family == AF_INET ? ((struct sockaddr_in*)pUnicast->Address.lpSockaddr)->sin_addr.S_un.S_addr : 0;
                DWORD dwMask = pUnicast->OnLinkPrefixLength;
                inet_ntop(AF_INET, &dwIP, szIP, sizeof(szIP));
                inet_ntop(AF_INET, &dwMask, szMask, sizeof(szMask));
                printf("IP address: %s/%s\n", szIP, szMask);

                // 获取MAC地址
                char szMAC[64];
                ULONG ulLen = sizeof(szMAC);
                if (SendARP(dwIP, 0, (PULONG)szMAC, &ulLen) == NO_ERROR) {
                    printf("MAC address: %02X-%02X-%02X-%02X-%02X-%02X\n", szMAC[0], szMAC[1], szMAC[2], szMAC[3], szMAC[4], szMAC[5]);
                }

                // 下一个IP地址
                pUnicast = pUnicast->Next;
            }

            // 下一个适配器
            pCurrAddresses = pCurrAddresses->Next;
        }
    }

    // 释放内存
    free(pAddresses);

    // 清理Winsock库
    WSACleanup();

    return 0;
}

该代码将遍历所有网络适配器，并输出它们的名称、IP地址和MAC地址。MAC地址的获取使用了SendARP函数。注意，该函数只能获取本地网络中的MAC地址，无法获取跨网络的MAC地址。