/*

 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>

#import <netinet/in.h>

typedef enum {

	NotReachable = 0,

	ReachableViaWiFi = 1,

	ReachableViaWWAN = 2

} 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