wincap网络数据包的捕获

/////////////////////////////////////////////////////////////////////////////
        /*2014年7月10日08:23:06  bojie   http://blog.csdn.net/bojie5744           */
	    /////////////////////////////////////////////////////////////////////////////	
	struct pcap_pkthdr 
	{
	struct timeval ts;
	bpf_u_int32 caplen;
	bpf_u_int32 len;
    };

#include "pcap.h"
#pragma comment(lib,"packet.lib")   
#pragma comment(lib,"wpcap.lib")
void packet_handler( u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data);
	int main()
	{
		pcap_if_t *alldevs;
		pcap_if_t *d;
		int inum;
		int i=0;
		pcap_t *adhandle;
		char errbuf[256];

		if ( pcap_findalldevs( &alldevs, errbuf ) == -1 )
		{
			fprintf_s( stderr, "pcap_findalldevs函数调用错误: %s/n", errbuf );
			exit(1);
		}

		for( d = alldevs; d; d = d->next )
		{
			printf_s( "%d. %s", ++i, d->name );
			if ( d->description )
				printf_s( " (%s)/n", d->description );
		}
		if(i == 0)
		{
			printf_s( "搜索错误/n" );
			return -1;
		}
		printf_s( "选择网卡 (1-%d):", i );
		scanf_s( "%d", &inum ); 
		if( inum < 1 || inum > i ) 
		{
			printf_s( "输入有误，没有此网卡/n" );
		
			pcap_freealldevs( alldevs );
			return -1;
		}
	
		for( d = alldevs, i = 0; i < inum-1; d = d->next, i++ );
	
		if ( (adhandle= pcap_open_live(
			d->name,   
			65536,      
			1,          
			1000,       
			errbuf     
			) ) == NULL)
		{
			fprintf_s( stderr, "错误： %s /n", errbuf );
		
			pcap_freealldevs( alldevs );
			return -1;
		}
		printf_s( "开始监听网卡%s/n", d->description );
	
		pcap_freealldevs( alldevs );
		
		pcap_loop( adhandle, 0, packet_handler, NULL );
		return 0;
	}

 void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data)
 {
  struct tm ltime;
  char timestr[20];
  time_t t = (time_t )&header->ts.tv_sec;
  localtime_s( <ime, &t );
  strftime( timestr, sizeof timestr, "%H:%M:%S", <ime);
  printf_s("%s,/t%.6d毫秒/t长度:%d/n", timestr, header->ts.tv_usec, header->len );
 }