Copyright (C) 2016 Apple Inc. All Rights Reserved.
 See LICENSE.txt for this sample’s licensing information
 Basic demonstration of how to use the SystemConfiguration Reachablity APIs.
#import <Foundation/Foundation.h>
#import <SystemConfiguration/SystemConfiguration.h>
#import <netinet/in.h>
typedef enum : NSInteger {
    NotReachable = 0,
} NetworkStatus;
#pragma mark IPv6 Support
//Reachability fully support IPv6.  For full details, see
extern NSString *kReachabilityChangedNotification;
@interface Reachability : NSObject
 * Use to check the reachability of a given host name.
+ (instancetype)reachabilityWithHostName:(NSString *)hostName;
 * Use to check the reachability of a given IP address.
+ (instancetype)reachabilityWithAddress:(const struct sockaddr *)hostAddress;
 * Checks whether the default route is available. Should be used by applications that do not connect to a particular host.
+ (instancetype)reachabilityForInternetConnection;
#pragma mark reachabilityForLocalWiFi
//reachabilityForLocalWiFi has been removed from the sample.  See for more information.
//+ (instancetype)reachabilityForLocalWiFi;
 * Start listening for reachability notifications on the current run loop.
- (BOOL)startNotifier;
- (void)stopNotifier;
- (NetworkStatus)currentReachabilityStatus;
 * WWAN may be available, but not active until a connection has been established. WiFi may require a connection for VPN on Demand.
- (BOOL)connectionRequired;