How to get bssid in iPhone without private library?

I need to get the bssid of the wifi for my iphone application to determine whether it is connected. How do I do it?

Need some guidance on how to do it.

I did it this way:

NSArray* interfaces = (NSArray*) CNCopySupportedInterfaces();

    for (NSString* interface in interfaces)
    {
        CFDictionaryRef networkDetails = CNCopyCurrentNetworkInfo((CFStringRef) interface);
        if (networkDetails)
        {
            NSLog(@"all details: %@", (NSDictionary *)networkDetails);
            NSLog(@"BSSID: %@", (NSString *)CFDictionaryGetValue (networkDetails, kCNNetworkInfoKeyBSSID));
            BSSID1 = (NSString *)CFDictionaryGetValue (networkDetails, kCNNetworkInfoKeyBSSID);
            BSSID = [[BSSID1 stringByReplacingOccurrencesOfString:@":"
                                                       withString:@""] uppercaseString];
            NSLog(@"%@",BSSID);

            CFRelease(networkDetails);
        }
    }