获得当前使用网卡名

#include <windows.h>
#include <IPHlpApi.h>//for GetAdaptersInfo
#include <stdio.h>

#pragma comment(lib, "Iphlpapi.lib")

void GetAdapterName(char* AdapterName)
{
	unsigned long len=0;
	PIP_ADAPTER_INFO pinfo = NULL;

	GetAdaptersInfo(pinfo,&len);//第一次调用，用于获得pinfo长度
	pinfo = (PIP_ADAPTER_INFO)malloc(len);
	GetAdaptersInfo(pinfo,&len);

	strcpy(AdapterName, "rpcap:////Device//NPF_");//为给pcap_open使用
	strcat(AdapterName, pinfo->AdapterName);
	free(pinfo);
}

void main()
{
	char AdapterName[128];
	GetAdapterName(AdapterName);
	printf("%s/n", AdapterName);
}