ARP协议(3)ARP编程--winpcap&vs2012配置

#define HAVE_REMOTE
#include "pcap.h"

void main()
{
    pcap_if_t *alldevs;// 适配器列表，它是一个链表的数据结构
    pcap_if_t *d; // 保存某个适配器
    int i=0;
    char errbuf[PCAP_ERRBUF_SIZE];
    
    //获取本地设备列表
    /* Retrieve the device list from the local machine */
    if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL /* auth is not needed */, &alldevs, errbuf) == -1)
    {
        fprintf(stderr,"Error in pcap_findalldevs_ex: %s\n", errbuf);
        exit(1);
    }
    
    /* Print the list */
    for(d= alldevs; d != NULL; d= d->next)
    {
        printf("%d. %s", ++i, d->name);
        if (d->description)
            printf(" (%s)\n", d->description);
        else
            printf(" (No description available)\n");
    }
    
    if (i == 0)
    {
        printf("\nNo interfaces found! Make sure WinPcap is installed.\n");
        return;
    }

    /* We don't need any more the device list. Free it */
    pcap_freealldevs(alldevs);
}

pcap_if_t *alldevs;// 适配器列表，它是一个链表的数据结构
//查找网络适配器，并把结果保存在 alldevs 里
pcap_findalldevs_ex(PCAP_SRC_IF_STRING, NULL /* auth is not needed */, &alldevs, errbuf)
// 用完之后要释放
 pcap_freealldevs(alldevs);