ios & android get mac address

unsigned char *ptr;

#ifndef SIOCGIFHWADDR

int mib[6];

size_t len;

char *buf;

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) {

return "";

}

if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {

return "";

}

if ((buf = (char*)malloc(len)) == NULL) {

return "";

}

if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {

free(buf);

buf = NULL;

return "";

}

ifm = (struct if_msghdr *)buf;

sdl = (struct sockaddr_dl *)(ifm + 1);

ptr = (unsigned char *)LLADDR(sdl);

#else

int sock_mac;

struct ifreq ifr_mac;

char mac_addr[30];

sock_mac = socket( AF_INET, SOCK_STREAM, 0 );

if( sock_mac == -1)

{

perror("create socket falise...mac\n");

return "";

}

memset(&ifr_mac,0,sizeof(ifr_mac));

strncpy(ifr_mac.ifr_name, "eth0", sizeof(ifr_mac.ifr_name)-1);

if( (ioctl(sock_mac, SIOCGIFHWADDR, &ifr_mac)) < 0)

{

printf("mac ioctl error\n");

return "";

}

ptr = (unsigned char*)ifr_mac.ifr_hwaddr.sa_data;

close( sock_mac );

#endif