记住要打开混杂模式,才能受到所有的包.

#include <string.h>
#include <sys/socket.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <netinet/in.h>

main()
{
 int32 sock,sock_selected,len;
 uint8 buffer[1500]={0}
 int32 maxfdp = 0;
 struct sockaddr_ll me;
 struct ifreq  ifr;
 fd_set fds;

 sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
 if (sock < 0)
        {
            printf("create socket error\n");
            return -1;
        }
 maxfdp = sock;

 memset(&ifr, 0, sizeof(struct ifreq));
        strcpy(ifr.ifr_name, "eth0");
        if (ioctl(sock[i], SIOCGIFINDEX, &ifr, sizeof(struct ifreq)) < 0)
        {
            printf("socket ioctl error\n");
            return -1;
        }

 memset(&me, 0, sizeof(struct sockaddr_ll));
        me.sll_family = AF_PACKET;
        me.sll_ifindex = ifr.ifr_ifindex;
        me.sll_pkttype = PACKET_OTHERHOST;

        if (bind(sock, (struct sockaddr *)&me, sizeof(struct sockaddr_ll))<0)
        {
            printf("socket error in bind\n");
            return -1;
        }
 
 maxfdp = maxfdp + 1;
 for(;;)
 {
  FD_ZERO(&fds);       
             FD_SET(sock,&fds);
   
  sock_selected=select(maxfdp,&fds,NULL,NULL,0);

     
 } 

 switch(sock_selected)
        {
            case -1:
                printf("Error in selecting socket!\n");
                return -1;
                break;
           
            case 0:
                break;
               
            default:
            
                    if(FD_ISSET(sock[i],&fds)) 
                    {
                        len = recvfrom(sock, buffer, 1500, 0, 0, 0);
                        if (len < 0)
                        {
                            printf("Receive socket error\n");
                            continue;
                        }

                    }
         }
 

}