Reachability.h

/*
 
 
 
 File: Reachability.h
 
 Abstract: Basic demonstration of how to use the SystemConfiguration Reachablity APIs.
 
 
 
 Version: 2.2
 
 
 
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 */





#import <Foundation/Foundation.h>

#import <SystemConfiguration/SystemConfiguration.h>



typedef enum {
	
    NotReachable = 0,
	
    ReachableViaWiFi,
	
    ReachableViaWWAN
	
} NetworkStatus;

#define kReachabilityChangedNotification @"kNetworkReachabilityChangedNotification"



@interface Reachability: NSObject

{
	
    BOOL localWiFiRef;
	
    SCNetworkReachabilityRef reachabilityRef;
	
}



//reachabilityWithHostName- Use to check the reachability of a particular host name. 

+ (Reachability*) reachabilityWithHostName: (NSString*) hostName;



//reachabilityWithAddress- Use to check the reachability of a particular IP address. 

+ (Reachability*) reachabilityWithAddress: (const struct sockaddr_in*) hostAddress;



//reachabilityForInternetConnection- checks whether the default route is available.  

//  Should be used by applications that do not connect to a particular host

+ (Reachability*) reachabilityForInternetConnection;



//reachabilityForLocalWiFi- checks whether a local wifi connection is available.

+ (Reachability*) 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;

@end