reachability always returns reachable...

Question

Hello All,

I'm having an interesting issue with reachability (or maybe my ability to figure out what to do) :)

Using several pieces of code from different places and including apple's reachability example, I'm experiencing a funny behavior... when I turn off the WIFI, the code returns a non reachable server.. I get that!!! BUT when I use the server as w.google.com, it says it's reachable...

Can anyone help me?

1) I would like to determine what WIFI name I'm connected to? (if it's not the proper corporate one, bail... )

2) if the server I need to connected to (FOOSERVER) consume services from is not reachable, bail...

3) if there's no WIFI signal, bail...

I've tried all sorts of things but I cant seems to make it work correctly!!

======== ConnectionVerification.h =========

#import <Foundation/Foundation.h>        
#import <SystemConfiguration/SystemConfiguration.h>  
#import <netinet/in.h>  
#import <arpa/inet.h>       
#import <netdb.h>       

@interface ConnectionVerification : NSObject {

}
+ (NSString *) localIPAddress;    
+ (NSString *) getIPAddressForHost: (NSString *) theHost;      
+ (BOOL) hostAvailable: (NSString *) theHost;     
+ (BOOL) addressFromString:(NSString *)IPAddress address:(struct sockaddr_in *)address;    
+ (BOOL) isConnected;    

\\\\   ConnectionVerification.m \\\\\   
+ (BOOL) isConnected {

    struct sockaddr_in zeroAddress;
    bzero(&zeroAddress, sizeof(zeroAddress));
    zeroAddress.sin_len = sizeof(zeroAddress);
    zeroAddress.sin_family = AF_INET;
        // Recover reachability flags
    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);
    SCNetworkReachabilityFlags flags;
    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
    CFRelease(defaultRouteReachability);

    if (!didRetrieveFlags) {
        NSLog(@"Error. Could not recover network reachability flags");
        return NO;
    }

    BOOL isReachable = flags & kSCNetworkFlagsReachable;
    BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;
    BOOL nonWiFi = flags & kSCNetworkReachabilityFlagsTransientConnection;
    NSURL *testURL = [NSURL URLWithString:@"http://w.google.com"];
    NSURLRequest *testRequest = [NSURLRequest requestWithURL:testURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:20.0];
    NSURLConnection *testConnection = [[[NSURLConnection alloc] initWithRequest:testRequest delegate:self] autorelease];

    NSLog(@" isReachable = %@",     isReachable? @"YES":@"NO");
    NSLog(@" needsConnection = %@", needsConnection? @"YES":@"NO");
    NSLog(@" nonWiFi = %@",         nonWiFi? @"YES":@"NO");

    BOOL temp = [self hostAvailable:@"w.google.com"];

    NSLog(@" temp = %@", temp? @"YES":@"NO");
    return ((isReachable && !needsConnection) || nonWiFi) ? (testConnection ? YES : NO) : NO;
}
\\\\   hostAvailable   \\\\\  From Erica Sadun Cookbook....          
+ (BOOL) hostAvailable: (NSString *) theHost {


    NSString *addressString = [self getIPAddressForHost:theHost];
    if (!addressString) 
    {
        printf("Error recovering IP address from host name\n");
        return NO;
    }

    struct sockaddr_in address;
    BOOL gotAddress = [self addressFromString:addressString address:&address];

    if (!gotAddress)
    {
        printf("Error recovering sockaddr address from %s\n", [addressString UTF8String]);
        return NO;
    }

    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&address);
    SCNetworkReachabilityFlags flags;

    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
    CFRelease(defaultRouteReachability);

    if (!didRetrieveFlags) 
    {
        printf("Error. Could not recover network reachability flags\n");
        return NO;
    }

    BOOL isReachable = flags & kSCNetworkFlagsReachable;
    return isReachable ? YES : NO;;
} 

WITHOUT WIFI (gdb) continue 2010-03-17 10:08:05.385 test[2326:207] isReachable = NO
2010-03-17 10:08:05.392 test[2326:207] needsConnection = NO
2010-03-17 10:08:05.396 test[2326:207] nonWiFi = NO
resolv: Unknown host
Error recovering IP address from host name
2010-03-17 10:08:05.416 test[2326:207] temp = NO

WITH WIFI 2010-03-17 10:08:51.800 test[2335:207] isReachable = YES
2010-03-17 10:08:51.809 test[2335:207] needsConnection = NO
2010-03-17 10:08:51.813 test[2335:207] nonWiFi = NO
2010-03-17 10:08:51.831 test[2335:207] temp = YES
2010-03-17 10:08:51.838 test[2335:207] Connection OK

Answer 1

w.google.com ???