iOS7以下设备获取mac地址

注意,是iOS7以下的设备,直接上源码,获取mac地址都是为了唯一标识一个设备的,但iOS7设备的mac地址为 020000000000

MacAddress.h

#include <sys/socket.h> 

#include <sys/sysctl.h>

#include <net/if.h>

#include <net/if_dl.h>



NSString *  macaddress();

MacAddress.m

#import "MacAddress.h"



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 = 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)];

    

    free(buf);

    

    return [outstring uppercaseString];

}

测试: