iOS 获得WIFI的MAC地址

来源：互联网发布：最短路问题的算法例题编辑：程序博客网时间：2024/06/14 22:07

调用: [类名 getMacAddress]
e.g. mac = @”02:48:00:00:00:00”

+ (NSString *)getMacAddress{    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];}

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