QT Windows 实现调用Windows API获取ARP 表

news2024/10/6 20:31:56

简介

使用ping方式获取网络可访问或者存在的设备发现部分会无法ping通但实际网络上存在此设备，但使用arp -a却可以显示出来，所以现在使用windows API的方式获取arp 表。

实现

参考Windows提供的示例转化成Qt
Qt .pro

LIBS += -liphlpapi
    LIBS += -lws2_32

main.cpp

#include <QCoreApplication>
#include <QDebug>
#include <winsock2.h>
#include <windows.h>
#include <ws2ipdef.h>
#include <iphlpapi.h>
#include <netioapi.h>

int main()
{
    PMIB_IPNET_TABLE2 pIpNetTable2 = NULL;
    DWORD dwSize = 0;
    unsigned long status = 0;

    // 获取ARP表
    status = GetIpNetTable2(AF_INET, &pIpNetTable2);
    if (status != NO_ERROR)
    {
        printf("GetIpNetTable2 failed (error code %lu)\n", status);
        free(pIpNetTable2);
        return 1;
    }

    // 遍历ARP表并打印每项
    for (DWORD i = 0; i < pIpNetTable2->NumEntries; i++)
    {
        MIB_IPNET_ROW2 row = pIpNetTable2->Table[i];
        QString ip = QString::fromStdString(inet_ntoa(row.Address.Ipv4.sin_addr));
        QString mac = QString::asprintf("%02X-%02X-%02X-%02X-%02X-%02X",
                                                             row.PhysicalAddress[0], row.PhysicalAddress[1],
                                                             row.PhysicalAddress[2], row.PhysicalAddress[3],
                                                             row.PhysicalAddress[4], row.PhysicalAddress[5]);
        if (ip.startsWith("192.168.3") && mac != QString("00-00-00-00-00-00") && row.State != NlnsUnreachable) // 过滤192.168.3网段， mac地址不能为零， 可到达
        {
            qDebug() << "IP: " << ip << ", mac: " << mac;
        }
    }

    // 释放缓冲区
    free(pIpNetTable2);

    return 0;
}