时间戳

首页 > 解决方案 > 为什么我的程序在打开网络设备时出现问题

c++ - 为什么我的程序在打开网络设备时出现问题

问题描述

我查看了libtins并在示例中找到了ARP Monitor 示例。示例代码如下：

#include <tins/tins.h>
#include <map>
#include <iostream>
#include <functional>

using std::cout;
using std::endl;
using std::map;
using std::bind;

using namespace Tins;

class arp_monitor {
public:
    void run(Sniffer& sniffer);
private:
    bool callback(const PDU& pdu);

    map<IPv4Address, HWAddress<6>> addresses;
};

void arp_monitor::run(Sniffer& sniffer) {
    sniffer.sniff_loop(
        bind(
            &arp_monitor::callback,
            this,
            std::placeholders::_1
        )
    );
}

bool arp_monitor::callback(const PDU& pdu) {
    // Retrieve the ARP layer
    const ARP& arp = pdu.rfind_pdu<ARP>();
    // Is it an ARP reply?
    if (arp.opcode() == ARP::REPLY) {
        // Let's check if there's already an entry for this address
        auto iter = addresses.find(arp.sender_ip_addr());
        if (iter == addresses.end()) {
            // We haven't seen this address. Save it.
            addresses.insert({ arp.sender_ip_addr(), arp.sender_hw_addr()});
            cout << "[INFO] " << arp.sender_ip_addr() << " is at "
                 << arp.sender_hw_addr() << std::endl;
        }
        else {
            // We've seen this address. If it's not the same HW address, inform it
            if (arp.sender_hw_addr() != iter->second) {
                cout << "[WARNING] " << arp.sender_ip_addr() << " is at " 
                     << iter->second << " but also at " << arp.sender_hw_addr() 
                     << endl;
            }
        }
    }
    return true;
}

int main(int argc, char* argv[]) {
    if(argc != 2) {
        cout << "Usage: " <<* argv << " <interface>" << endl;
        return 1;
    }
    arp_monitor monitor;
    // Sniffer configuration
    SnifferConfiguration config;
    config.set_promisc_mode(true);
    config.set_filter("arp");

    try {
        // Sniff on the provided interface in promiscuous mode
        Sniffer sniffer(argv[1], config);
        
        // Only capture arp packets
        monitor.run(sniffer);
    }
    catch (std::exception& ex) {
        std::cerr << "Error: " << ex.what() << std::endl;
    }
}

我在这里运行此代码：

我的程序.exe eth0

结果是：

错误：打开适配器时出错：系统找不到给定的设备。(20)

上述词语的定义：

eth0：我的网络设备

libtins：高级、多平台 C++ 网络数据包嗅探和制作库

ARP：地址解析协议

我在 Windows 上只在一个名为“Shadow”的用户上运行它

用户目录的图像

标签： c++libpcaplibtins

解决方案

根据 te OP 上传的图片，我只能得出结论，我对他在 Windows 上运行程序的看法是正确的，所以我只是从libtins 的文档中复制：

为了在 Windows 上捕获数据包，您可以首先列出所有网络接口。您可以使用 NetworkInterface 类轻松地做到这一点：

// First fetch all network interfaces
vector<NetworkInterface> interfaces = NetworkInterface::all();

// Now iterate them
for (const NetworkInterface& iface : interfaces) {
    // First print the name (GUID)
    cout << "Interface name: " << iface.name();

    // Now print the friendly name, a wstring that will contain something like 
    // "Local Area Connection 2"
    wcout << " (" << iface.friendly_name() << ")" << endl;
}

该小代码片段应提供如下输出：

Interface name: {6527cc7d-c647-4986-ac10-7784dc1f2439} (Local Area Connection 1)
Interface name: {309d733f-79bb-41ef-aaec-8a7b83d2adcf} (Local Area Connection 2)
Interface name: {55ab969f-80df-4d51-8130-291d54a752a3} (Local Area Connection 3)

这可能足以让您识别出您要使用哪个界面。您还可以求助于获取默认界面，这很可能是您想要使用的界面，或者显示每个界面的 IP 地址，直到您识别它们：

// Get the default interface (where the default gateway route is)
NetworkInterface iface = NetworkInterface::default_interface();

// Print the name and the IP address
cout << "Default interface: " << iface.name() 
     << " (" << iface.addresses().ip_addr() << ")" << endl;

推荐阅读