问升级到新的linux以太网驱动程序后，libpcap无法捕获数据包

EN

#include <pcap.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
   pcap_t *handle;                 /* Session handle */
   char dev[20];                   /* The device to sniff on */
   char errbuf[PCAP_ERRBUF_SIZE];  /* Error string */
   struct bpf_program fp;          /* The compiled filter */
   bpf_u_int32 mask;               /* Our netmask */
   bpf_u_int32 net;                /* Our IP */
   struct pcap_pkthdr header;      /* The header that pcap gives us */
   const u_char *packet;           /* The actual packet */

   if (argc <= 1) return(1);
      strcpy(dev, argv[1]);

   /* Find the properties for the device */
   if (pcap_lookupnet(dev, &net, &mask, errbuf) == -1) {
      fprintf(stderr, "Couldn't get netmask for device %s: %s\n", dev, errbuf);
      net = 0;
      mask = 0;
   }

   /* Open the session in promiscuous mode */
   handle = pcap_open_live(dev, BUFSIZ, 1, 1000, errbuf);
   if (handle == NULL) {
       fprintf(stderr, "Couldn't open device %s: %s\n", dev, errbuf);
       return(2);
   }

   /* Grab a packet */
   packet = pcap_next(handle, &header);
   /* Print its length */
   printf("packet length [%d]; captured length [%d]\n", header.len, header.caplen);
   /* And close the session */
   pcap_close(handle);
   return(0);
}