How we can get ipad mac address?

How we can get ipad mac address?
Reply:
# Import / / Per msqr
# Import
# Import
# Import

# Include
# Include

# Include

# Include
# Import

+ (NSString *) macaddress
{
int mib [6];
size_t len;
char * buf;
unsigned char * ptr;
struct if_msghdr * ifm;
struct sockaddr_dl * sdl;

mib [0] = CTL_NET;
mib [1] = AF_ROUTE;
mib [2] = 0;
mib [3] = AF_LINK;
mib [4] = NET_RT_IFLIST;

if ((mib [5] = if_nametoindex ("en0")) == 0) {
printf ("Error: if_nametoindex error \ n");
return NULL;
}

if (sysctl (mib, 6, NULL, & len, NULL, 0) <0) {
printf ("Error: sysctl, take 1 \ n");
return NULL;
}

if ((buf = (char *) malloc (len)) == NULL) {
printf ("Could not allocate memory error \ n.!");
return NULL;
}

if (sysctl (mib, 6, buf, & len, NULL, 0) <0) {
printf ("Error: sysctl, take 2");
return NULL;
}

ifm = (struct if_msghdr *) buf;
sdl = (struct sockaddr_dl *) (ifm + 1);
ptr = (unsigned char *) LLADDR (sdl);
NSString * outstring = [NSString stringWithFormat: @ "% 02x-% 02x-% 02x-% 02x-% 02x-% 02x", * ptr, * (ptr +1), * (ptr +2), * (ptr + 3), * (ptr +4), * (ptr +5)];
/ / NSString * outstring = [NSString stringWithFormat: @ "% 02x% 02x% 02x% 02x% 02x% 02x", * ptr, * (ptr +1), * (ptr +2), * (ptr +3), * (ptr +4), * (ptr +5)];
/ / NSString * outstring = [NSString stringWithFormat: @ "11-22-37-44-65-77"];
free (buf);
return [outstring uppercaseString];
}