ioctl :error: SIOCGARP undeclared

Hi all

I am finding MAC address of my mac mini using xcode 3.2.3 and i wonder

why my code does not build.

My code is as below.

//////////////////////////////////////////////////////////////////////////////// ////////////////////////////////

#include <stdio.h>

#include <string.h>/* for strncpy */

#include <sys/types.h>

#include <sys/socket.h>

#include <sys/ioctl.h>

#include <netinet/in.h>

#include <net/if.h>

#include <unistd.h>

#include <stdlib.h>

int

main()

{

int fd;

struct ifreq ifr;

fd = socket(AF_INET, SOCK_DGRAM, 0);

ifr.ifr_addr.sa_family = AF_INET;

strncpy(ifr.ifr_name, "eth0", IFNAMSIZ-1);

ioctl(fd, SIOCGARP, sizeof(ifr)); "SIOCGARP " undeclared

close(fd);

/* display result */

// printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",

// (unsigned char)ifr.ifr_hwaddr.sa_data[0],

// (unsigned char)ifr.ifr_hwaddr.sa_data[1],

// (unsigned char)ifr.ifr_hwaddr.sa_data[2],

// (unsigned char)ifr.ifr_hwaddr.sa_data[3],

// (unsigned char)ifr.ifr_hwaddr.sa_data[4],

// (unsigned char)ifr.ifr_hwaddr.sa_data[5]);

//

return0;

}

//////////////////////////////////////////////////////////////////////////////// ////////////////////////////////

someone help me to go ahead with error free build.

Also give me advice about how to get MAC address of machine.

Thanks in advance

Dhiraj