iPhone SDK develop & programming tips

BOOL IsWIFIConnection
{
	BOOL ret = YES;
	struct ifaddrs * first_ifaddr, * current_ifaddr;
	NSMutableArray* activeInterfaceNames = [[NSMutableArray alloc] init];
	getifaddrs( &first_ifaddr );
	current_ifaddr = first_ifaddr;
	while( current_ifaddr!=NULL )
	{
		if( current_ifaddr->ifa_addr->sa_family==0x02 )
		{
			[activeInterfaceNames addObject:[NSString stringWithFormat:@"%s", current_ifaddr->ifa_name]];
		}
		current_ifaddr = current_ifaddr->ifa_next;
	}
	ret = [activeInterfaceNames containsObject:@"en0"] || [activeInterfaceNames containsObject:@"en1"];
	[activeInterfaceNames release];
	return ret;
}