On Jan 28, 2010, at 9:22 PM, Laurent Daudelin wrote:

>    host = CFHostCreateWithName(kCFAllocatorDefault, (CFStringRef)hostName);
>    assert(host != NULL);
>       
>       SCNetworkReachabilityRef target = 
> SCNetworkReachabilityCreateWithName(NULL, [hostName 
> cStringUsingEncoding:NSUTF8StringEncoding]);

It seems redundant to convert the hostname string into a CFHost and then back 
into a string. Have you verified that you're getting a reasonable C string at 
the end?

>       SCNetworkReachabilityGetFlags(target, &flags);

Try checking the error code this returns. All the examples I've seen do this 
asynchronously by setting up a runloop-based callback; I'm not certain that the 
flags are valid immediately after you create the ref.

—Jens_______________________________________________

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