C++编程->Winpcap网络数据保存为pcap文件

最新推荐文章于 2023-11-13 11:41:31 发布

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最新推荐文章于 2023-11-13 11:41:31 发布 · 2.5k 阅读

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CC 4.0 BY-SA版权

本文介绍了如何利用C++编程结合Winpcap库，捕获网络数据并将其保存为标准的pcap文件格式。通过示例代码详细阐述了数据包捕获与写入文件的过程，帮助读者理解网络数据抓取与存储的方法。

#ifdef _MSC_VER
/*
 * we do not want the warnings about the old deprecated and unsecure CRT functions
 * since these examples can be compiled under *nix as well
 */
#define _CRT_SECURE_NO_WARNINGS
#endif

#include "pcap.h"

/* prototype of the packet handler */
void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data);

int main(int argc, char **argv)
{
	pcap_if_t *alldevs;
	pcap_if_t *d;
	int inum;
	int i=0;
	pcap_t *adhandle;
	char errbuf[PCAP_ERRBUF_SIZE];
	pcap_dumper_t *dumpfile;
	

    /* Check command line */
	if(argc != 2)
	{
        printf("usage: %s filename", argv[0]);
        return -1;
    }
    
	/* Retrieve the device list on the local machine */
	if (pcap_findalldevs(&alldevs, errbuf) == -1)
	{
		fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf);
		exit(1);
	}
    
    /* Print the list */
    for(d=alldevs; d; d=d->next)
    {
        printf("%d. %s", ++i, d->name