#import "AppDelegate.h"

#import <SystemConfiguration/SystemConfiguration.h>

#import <netinet/in.h>

@implementation AppDelegate

@synthesize window, navController, cryptoQueue;

- (BOOL)isNetworkAvailableFlags:(SCNetworkReachabilityFlags *)outFlags {

SCNetworkReachabilityRef defaultRouteReachability;

struct sockaddr_in zeroAddress;

bzero(&zeroAddress, sizeof(zeroAddress));

zeroAddress.sin_len = sizeof(zeroAddress);

zeroAddress.sin_family = AF_INET;

defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);

SCNetworkReachabilityFlags flags;

BOOL gotFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);

if (!gotFlags) {

return NO;

}

// kSCNetworkReachabilityFlagsReachable indicates that the specified nodename or address can

// be reached using the current network configuration.

BOOL isReachable = flags & kSCNetworkReachabilityFlagsReachable;

// This flag indicates that the specified nodename or address can

// be reached using the current network configuration, but a

// connection must first be established.

//

// If the flag is false, we don't have a connection. But because CFNetwork

// automatically attempts to bring up a WWAN connection, if the WWAN reachability

// flag is present, a connection is not required.

BOOL noConnectionRequired = !(flags & kSCNetworkReachabilityFlagsConnectionRequired);

if ((flags & kSCNetworkReachabilityFlagsIsWWAN)) {

noConnectionRequired = YES;

}

// Callers of this method might want to use the reachability flags, so if an 'out' parameter

// was passed in, assign the reachability flags to it.

if (outFlags) {

*outFlags = flags;

}

return isReachable && noConnectionRequired;

}

- (void)applicationDidFinishLaunching:(UIApplication *)application {

// Is WiFi network available? That's necessary to use Bonjour.

if ([self isNetworkAvailableFlags:NULL] == NO) {

// open an alert with just an OK button

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No WiFi network available."

message:@"Exit this app and enable WiFi using the Settings application."

delegate:self

cancelButtonTitle:@"OK"

otherButtonTitles: nil];

[alert show];

[alert release];

}

else {

// Add the controller's view as a subview of the window

[self.window addSubview:navController.view];

NSOperationQueue * theQueue = [[NSOperationQueue alloc] init];

self.cryptoQueue = theQueue;

[theQueue release];

}

}

- (void)dealloc {

[cryptoQueue release];

[navController release];

[window release];

[super dealloc];

}