+++ /dev/null
-/*
-
- File: Reachability.h
- Abstract: Basic demonstration of how to use the SystemConfiguration Reachablity APIs.
-
- Version: 2.2
-
- Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc.
- ("Apple") in consideration of your agreement to the following terms, and your
- use, installation, modification or redistribution of this Apple software
- constitutes acceptance of these terms. If you do not agree with these terms,
- please do not use, install, modify or redistribute this Apple software.
-
- In consideration of your agreement to abide by the following terms, and subject
- to these terms, Apple grants you a personal, non-exclusive license, under
- Apple's copyrights in this original Apple software (the "Apple Software"), to
- use, reproduce, modify and redistribute the Apple Software, with or without
- modifications, in source and/or binary forms; provided that if you redistribute
- the Apple Software in its entirety and without modifications, you must retain
- this notice and the following text and disclaimers in all such redistributions
- of the Apple Software.
- Neither the name, trademarks, service marks or logos of Apple Inc. may be used
- to endorse or promote products derived from the Apple Software without specific
- prior written permission from Apple. Except as expressly stated in this notice,
- no other rights or licenses, express or implied, are granted by Apple herein,
- including but not limited to any patent rights that may be infringed by your
- derivative works or by other works in which the Apple Software may be
- incorporated.
-
- The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
- WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
- WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
- COMBINATION WITH YOUR PRODUCTS.
-
- IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR
- DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF
- CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
- APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- Copyright (C) 2010 Apple Inc. All Rights Reserved.
-
-*/
-
-
-#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
-
-
+++ /dev/null
-/*
-
- File: Reachability.m
- Abstract: Basic demonstration of how to use the SystemConfiguration Reachablity APIs.
-
- Version: 2.2
-
- Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc.
- ("Apple") in consideration of your agreement to the following terms, and your
- use, installation, modification or redistribution of this Apple software
- constitutes acceptance of these terms. If you do not agree with these terms,
- please do not use, install, modify or redistribute this Apple software.
-
- In consideration of your agreement to abide by the following terms, and subject
- to these terms, Apple grants you a personal, non-exclusive license, under
- Apple's copyrights in this original Apple software (the "Apple Software"), to
- use, reproduce, modify and redistribute the Apple Software, with or without
- modifications, in source and/or binary forms; provided that if you redistribute
- the Apple Software in its entirety and without modifications, you must retain
- this notice and the following text and disclaimers in all such redistributions
- of the Apple Software.
- Neither the name, trademarks, service marks or logos of Apple Inc. may be used
- to endorse or promote products derived from the Apple Software without specific
- prior written permission from Apple. Except as expressly stated in this notice,
- no other rights or licenses, express or implied, are granted by Apple herein,
- including but not limited to any patent rights that may be infringed by your
- derivative works or by other works in which the Apple Software may be
- incorporated.
-
- The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
- WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
- WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
- COMBINATION WITH YOUR PRODUCTS.
-
- IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR
- DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF
- CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
- APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- Copyright (C) 2010 Apple Inc. All Rights Reserved.
-
-*/
-
-#import <sys/socket.h>
-#import <netinet/in.h>
-#import <netinet6/in6.h>
-#import <arpa/inet.h>
-#import <ifaddrs.h>
-#import <netdb.h>
-
-#import <CoreFoundation/CoreFoundation.h>
-
-#import "Reachability.h"
-
-#define kShouldPrintReachabilityFlags 1
-
-static void PrintReachabilityFlags(SCNetworkReachabilityFlags flags, const char* comment)
-{
-#if kShouldPrintReachabilityFlags
-
- NSLog(@"Reachability Flag Status: %c%c %c%c%c%c%c%c%c %s\n",
- (flags & kSCNetworkReachabilityFlagsIsWWAN) ? 'W' : '-',
- (flags & kSCNetworkReachabilityFlagsReachable) ? 'R' : '-',
-
- (flags & kSCNetworkReachabilityFlagsTransientConnection) ? 't' : '-',
- (flags & kSCNetworkReachabilityFlagsConnectionRequired) ? 'c' : '-',
- (flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) ? 'C' : '-',
- (flags & kSCNetworkReachabilityFlagsInterventionRequired) ? 'i' : '-',
- (flags & kSCNetworkReachabilityFlagsConnectionOnDemand) ? 'D' : '-',
- (flags & kSCNetworkReachabilityFlagsIsLocalAddress) ? 'l' : '-',
- (flags & kSCNetworkReachabilityFlagsIsDirect) ? 'd' : '-',
- comment
- );
-#endif
-}
-
-
-@implementation Reachability
-static void ReachabilityCallback(SCNetworkReachabilityRef target, SCNetworkReachabilityFlags flags, void* info)
-{
- #pragma unused (target, flags)
- NSCAssert(info != NULL, @"info was NULL in ReachabilityCallback");
- NSCAssert([(NSObject*) info isKindOfClass: [Reachability class]], @"info was wrong class in ReachabilityCallback");
-
- //We're on the main RunLoop, so an NSAutoreleasePool is not necessary, but is added defensively
- // in case someon uses the Reachablity object in a different thread.
- NSAutoreleasePool* myPool = [[NSAutoreleasePool alloc] init];
-
- Reachability* noteObject = (Reachability*) info;
- // Post a notification to notify the client that the network reachability changed.
- [[NSNotificationCenter defaultCenter] postNotificationName: kReachabilityChangedNotification object: noteObject];
-
- [myPool release];
-}
-
-- (BOOL) startNotifier
-{
- BOOL retVal = NO;
- SCNetworkReachabilityContext context = {0, self, NULL, NULL, NULL};
- if(SCNetworkReachabilitySetCallback(reachabilityRef, ReachabilityCallback, &context))
- {
- if(SCNetworkReachabilityScheduleWithRunLoop(reachabilityRef, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode))
- {
- retVal = YES;
- }
- }
- return retVal;
-}
-
-- (void) stopNotifier
-{
- if(reachabilityRef!= NULL)
- {
- SCNetworkReachabilityUnscheduleFromRunLoop(reachabilityRef, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
- }
-}
-
-- (void) dealloc
-{
- [self stopNotifier];
- if(reachabilityRef!= NULL)
- {
- CFRelease(reachabilityRef);
- }
- [super dealloc];
-}
-
-+ (Reachability*) reachabilityWithHostName: (NSString*) hostName;
-{
- Reachability* retVal = NULL;
- SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(NULL, [hostName UTF8String]);
- if(reachability!= NULL)
- {
- retVal= [[[self alloc] init] autorelease];
- if(retVal!= NULL)
- {
- retVal->reachabilityRef = reachability;
- retVal->localWiFiRef = NO;
- }
- }
- return retVal;
-}
-
-+ (Reachability*) reachabilityWithAddress: (const struct sockaddr_in*) hostAddress;
-{
- SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, (const struct sockaddr*)hostAddress);
- Reachability* retVal = NULL;
- if(reachability!= NULL)
- {
- retVal= [[[self alloc] init] autorelease];
- if(retVal!= NULL)
- {
- retVal->reachabilityRef = reachability;
- retVal->localWiFiRef = NO;
- }
- }
- return retVal;
-}
-
-+ (Reachability*) reachabilityForInternetConnection;
-{
- struct sockaddr_in zeroAddress;
- bzero(&zeroAddress, sizeof(zeroAddress));
- zeroAddress.sin_len = sizeof(zeroAddress);
- zeroAddress.sin_family = AF_INET;
- return [self reachabilityWithAddress: &zeroAddress];
-}
-
-+ (Reachability*) reachabilityForLocalWiFi;
-{
- struct sockaddr_in localWifiAddress;
- bzero(&localWifiAddress, sizeof(localWifiAddress));
- localWifiAddress.sin_len = sizeof(localWifiAddress);
- localWifiAddress.sin_family = AF_INET;
- // IN_LINKLOCALNETNUM is defined in <netinet/in.h> as 169.254.0.0
- localWifiAddress.sin_addr.s_addr = htonl(IN_LINKLOCALNETNUM);
- Reachability* retVal = [self reachabilityWithAddress: &localWifiAddress];
- if(retVal!= NULL)
- {
- retVal->localWiFiRef = YES;
- }
- return retVal;
-}
-
-#pragma mark Network Flag Handling
-
-- (NetworkStatus) localWiFiStatusForFlags: (SCNetworkReachabilityFlags) flags
-{
- PrintReachabilityFlags(flags, "localWiFiStatusForFlags");
-
- NetworkStatus retVal = NotReachable;
- if((flags & kSCNetworkReachabilityFlagsReachable) && (flags & kSCNetworkReachabilityFlagsIsDirect))
- {
- retVal = ReachableViaWiFi;
- }
- return retVal;
-}
-
-- (NetworkStatus) networkStatusForFlags: (SCNetworkReachabilityFlags) flags
-{
- PrintReachabilityFlags(flags, "networkStatusForFlags");
- if ((flags & kSCNetworkReachabilityFlagsReachable) == 0)
- {
- // if target host is not reachable
- return NotReachable;
- }
-
- NetworkStatus retVal = NotReachable;
-
- if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0)
- {
- // if target host is reachable and no connection is required
- // then we'll assume (for now) that your on Wi-Fi
- retVal = ReachableViaWiFi;
- }
-
-
- if ((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||
- (flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0))
- {
- // ... and the connection is on-demand (or on-traffic) if the
- // calling application is using the CFSocketStream or higher APIs
-
- if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0)
- {
- // ... and no [user] intervention is needed
- retVal = ReachableViaWiFi;
- }
- }
-
- if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)
- {
- // ... but WWAN connections are OK if the calling application
- // is using the CFNetwork (CFSocketStream?) APIs.
- retVal = ReachableViaWWAN;
- }
- return retVal;
-}
-
-- (BOOL) connectionRequired;
-{
- NSAssert(reachabilityRef != NULL, @"connectionRequired called with NULL reachabilityRef");
- SCNetworkReachabilityFlags flags;
- if (SCNetworkReachabilityGetFlags(reachabilityRef, &flags))
- {
- return (flags & kSCNetworkReachabilityFlagsConnectionRequired);
- }
- return NO;
-}
-
-- (NetworkStatus) currentReachabilityStatus
-{
- NSAssert(reachabilityRef != NULL, @"currentNetworkStatus called with NULL reachabilityRef");
- NetworkStatus retVal = NotReachable;
- SCNetworkReachabilityFlags flags;
- if (SCNetworkReachabilityGetFlags(reachabilityRef, &flags))
- {
- if(localWiFiRef)
- {
- retVal = [self localWiFiStatusForFlags: flags];
- }
- else
- {
- retVal = [self networkStatusForFlags: flags];
- }
- }
- return retVal;
-}
-@end