如何在FreeBSD下实现获取MAC地址？谢谢

我这个好象更简单：（linux 7.2上通过)#include <stdio.h>;
#include <string.h>;
#include <netdb.h>;
#include <arpa/inet.h>;
#include <netinet/in.h>;
#include <sys/types.h>;
#include <sys/socket.h>;
#include <sys/ioctl.h>;
#include <net/if.h>;
#include <net/if_arp.h>;
#include <net/ethernet.h>;
#include <signal.h>;
#include <netinet/ip.h>;

struct in_addr myself,mymask;
int fd_arp;
struct ifreq ifr;

main(int argc,char* argv[]) {
  char device[32];
  struct sockaddr from,to;
  int fromlen;
  struct sockaddr_in *sin_ptr;
  u_char *ptr;
  int n;
  strcpy(device,"lo"

;
if((fd_arp=socket(AF_INET,SOCK_PACKET,htons(0x0806)))<0) {
perror("arp socket error"

;
exit(-1);
  }

  strcpy(ifr.ifr_name,device);
  if(ioctl(fd_arp,SIOCGIFADDR,&ifr)<0) {
perror("ioctl SIOCGIFADDR error"

;
exit(-1);
  }
  sin_ptr=(struct sockaddr_in *)&ifr.ifr_addr;
  myself=sin_ptr->;sin_addr;

  // get network mask
  if(ioctl(fd_arp,SIOCGIFNETMASK,&ifr)<0) {
perror("ioctl SIOCGIFNETMASK error"

;
exit(-1);
  }
  sin_ptr=(struct sockaddr_in *)&ifr.ifr_addr;
  mymask=sin_ptr->;sin_addr;

  // get mac address
  if(ioctl(fd_arp,SIOCGIFHWADDR,&ifr)<0) {
perror("ioctl SIOCGIFHWADDR error"

;
exit(-1);
  }
  ptr=(u_char *)&ifr.ifr_ifru.ifru_hwaddr.sa_data[0];
  printf("\nrequest mac %02x:%02x:%02x:%02x:%02x:%02x,",*ptr,*(ptr+1),*(ptr+2),*(ptr+3),*(ptr+4),*(ptr+5));
  printf("\nrequest netmask %s",inet_ntoa(mymask));
  printf("\nrequest IP %s\n",inet_ntoa(myself));
}