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/*
File: Reachability.h
Abstract: SystemConfiguration framework wrapper.
Version: 1.5
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*/
#import <UIKit/UIKit.h>
#import <SystemConfiguration/SystemConfiguration.h>
@class Reachability;
@interface Reachability : NSObject {
@private
BOOL _networkStatusNotificationsEnabled;
NSString *_hostName;
NSString *_address;
NSMutableDictionary *_reachabilityQueries;
}
/*
An enumeration that defines the return values of the network state
of the device.
*/
typedef enum {
NotReachable = 0,
ReachableViaCarrierDataNetwork,
ReachableViaWiFiNetwork
} NetworkStatus;
// Set to YES to register for changes in network status. Otherwise reachability queries
// will be handled synchronously.
@property BOOL networkStatusNotificationsEnabled;
// The remote host whose reachability will be queried.
// Either this or 'addressName' must be set.
@property (nonatomic, strong) NSString *hostName;
// The IP address of the remote host whose reachability will be queried.
// Either this or 'hostName' must be set.
@property (nonatomic, strong) NSString *address;
// A cache of ReachabilityQuery objects, which encapsulate a SCNetworkReachabilityRef, a host or address, and a run loop. The keys are host names or addresses.
@property (nonatomic, strong) NSMutableDictionary *reachabilityQueries;
// This class is intended to be used as a singleton.
+ (Reachability *)sharedReachability;
// Is self.hostName is not nil, determines its reachability.
// If self.hostName is nil and self.address is not nil, determines the reachability of self.address.
- (NetworkStatus)remoteHostStatus;
// Is the device able to communicate with Internet hosts? If so, through which network interface?
- (NetworkStatus)internetConnectionStatus;
// Is the device able to communicate with hosts on the local WiFi network? (Typically these are Bonjour hosts).
- (NetworkStatus)localWiFiConnectionStatus;
/*
When reachability change notifications are posted, the callback method 'ReachabilityCallback' is called
and posts a notification that the client application can observe to learn about changes.
*/
static void ReachabilityCallback(SCNetworkReachabilityRef target, SCNetworkReachabilityFlags flags, void *info);
@end
@interface ReachabilityQuery : NSObject
{
@private
SCNetworkReachabilityRef _reachabilityRef;
CFMutableArrayRef _runLoops;
NSString *_hostNameOrAddress;
}
// Keep around each network reachability query object so that we can
// register for updates from those objects.
@property (nonatomic) SCNetworkReachabilityRef reachabilityRef;
@property (nonatomic, strong) NSString *hostNameOrAddress;
@property (nonatomic) CFMutableArrayRef runLoops;
- (void)scheduleOnRunLoop:(NSRunLoop *)inRunLoop;
@end