程序1, 获取网卡信息并启动capture

func.h

#pragma once
#ifndef __FUNC_H
#define __FUNC_H
#define HAVE_REMOTE
#include<winsock2.h>
#include<windows.h>

#include<stdio.h>
#include"pcap.h"
#include"remote-ext.h"


//获取网卡信息
void showNetworkAdapter();

//获取网卡属性
void showAdapterInfo();

//捕获数据包
void capturePackets();


//输出捕获的数据包的回调函数
void showCapturedData(u_char* param, const struct pcap_pkthdr* header, const u_char* pkt_data);
#endif // !__FUNC_H

 

func.cpp

#include"func.h"

void showNetworkAdapter()
{
    pcap_if_t* pAdapter;
    pcap_if_t* temp;
    char errorBuffer[1024] = { 0 };

    if (pcap_findalldevs_ex("rpcap://", 0, &pAdapter, errorBuffer) == -1)
    {
        fprintf(stderr, "获取网卡信息失败,原因:%s\n", errorBuffer);
        return;
    }

    if (pAdapter==NULL)
    {
        printf("没有网卡\n");
        return;
    }
    temp = pAdapter;
    while (temp)
    {
        printf("网卡名: %s \t 网卡信息: %s\n", temp->name, temp->description);
        temp = temp->next;
    }

    pcap_freealldevs(pAdapter);
}


void showAdapterInfo()
{

}

void capturePackets()
{
    pcap_if_t* pAdapter;
    pcap_if_t* temp;
    pcap_t* ptargetAdapter;
    size_t no = 0;
    size_t target_no = 0;
    char errorBuffer[1024] = { 0 };
    if (pcap_findalldevs_ex("rpcap://", 0, &pAdapter, errorBuffer) == -1)
    {
        fprintf(stderr, "获取网卡信息失败,原因:%s\n", errorBuffer);
        return;
    }

    if (pAdapter == NULL)
    {
        printf("没有网卡\n");
        return;
    }
    temp = pAdapter;
    while (temp)
    {
        no++;
        printf("No %d:网卡名: %s \t 网卡信息: %s\n", no, temp->name, temp->description);
        temp = temp->next;
        
    }
    printf("输入要捕获的网卡号:1-%d\n", no);
    scanf("%d", &target_no);

    temp = pAdapter;
    for (size_t i = 1; i < target_no; i++)
    {
        temp = temp->next;
    }

    //以混杂模式打开目标设备并设置捕获数据每次捕获时间间隔为1s.
    memset(errorBuffer, 0, sizeof(errorBuffer));
    ptargetAdapter = pcap_open(temp->name, 1024, PCAP_OPENFLAG_PROMISCUOUS, 1000, 0, errorBuffer);

    if (ptargetAdapter==0)
    {
        fprintf(stderr, "打开失败,错误原因:%s\n",errorBuffer);
    }

    printf("在设备%s启动监听...\n", temp->description);
    pcap_freealldevs(pAdapter);
    //设置回调函数并捕获数据包给回调函数处理.数据包作为参数自动发给回调函数.还能能回调函数发送
    //一个自定义参数,这里没有,直接设置为0
    pcap_loop(ptargetAdapter, 0, showCapturedData, 0);
}

//捕获数据包回调函数,第一个参数是pcap_loop函数给的,第2个参数是数据包包头信息是由winpcap封装的
//结构体. 第3个参数是数据包内容
void showCapturedData(u_char * param, const pcap_pkthdr * header, const u_char * pkt_data)
{
    //下面几行是处理数据包头的发送时间戳转为正常时间,代码固定
    struct tm* ltime;
    char timestr[16] = { 0 };
    time_t local_tv_sec = header->ts.tv_sec;
    ltime = localtime(&local_tv_sec);
    strftime(timestr, sizeof(timestr), "%H:%M:%S", ltime);
    printf("%s,%.6d len:%d\n", timestr, header->ts.tv_usec, header->len);




}

 

main.cpp

#include "func.h"

int main()
{
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    //showNetworkAdapter();
    capturePackets();

    return 0;
}