*数据包捕获线程*/

UINT do_capture(LPVOID pParam)

{

  char errbuf[PCAP_ERRBUF_SIZE];

  pcap_t *fp;

  int res;

  struct pcap_pkthdr *header;

  const u_char *pkt_data;

  CString str;

  unsigned int i;

  struct packetstru *cur_pack,*new_pack;

  char s[100];

  CStatic *static1,*static2;

  int found;

  static1=(CStatic *)AfxGetMainWnd()->GetDlgItem(IDC_STATIC1);

  static2=(CStatic *)AfxGetMainWnd()->GetDlgItem(IDC_STATIC2);

  fp = pcap_open_live(*devicename,65536,1,-1,errbuf);  //打开网络设备

  while(1)

  {

    if(captureflag==0)

         break;

    res = pcap_next_ex( fp, &header, &pkt_data);  //读数据包

       if(res==0)  //超时返回

       {

         Sleep(1);

         continue;

       }

       if(res<0)  //发生错误

       {

         break;