Checking Internet connection on Vista

[Bernard Devlin]

Maybe the most reliable time-critical way to check would be to open your own
socket on port 80 to something like www.google.com.  By setting the
SocketTimeoutInterval to a low value you would find out quickly if the
timeout occured without a response.  I'm thinking that you would not even
send a GET request, just see if the socket could be opened.

bernard

On Fri, Jun 20, 2008 at 4:52 PM, Eric Chatonet <
eric.chatonet at sosmartsoftware.com> wrote:

> Thanks for testing at your place: it's invaluable :-)
> Tests I made were with the router connected but the ADSL modem disconnected
> and I'm afraid it is the delay reason.
>
> Le 20 juin 08 à 17:45, Bernard Devlin a écrit :
>
>
>  I done some further tests, and mostly I'm getting a result with the router
>> disconnected of less than 30ms now.  I can't reproduce the case where I
>> got
>> 14 seconds.  I had a look at socketTimeoutInterval and it seemed to make
>> no
>> difference at all.  Still, if you are getting lengthy delays then it looks
>> like this is not an adequate way to get a speedy test to see if the
>> internet
>> connection is still alive.
>>
>> Bernard
>>
>> On Fri, Jun 20, 2008 at 3:53 PM, Eric Chatonet <
>> eric.chatonet at sosmartsoftware.com> wrote:
>>
>>  Your allusion about SocketTimeoutInterval seems to be very well thought
>>> :-)
>>> The problem is that I (the user) can't accept more than a 200 ms hang and
>>> this could be not enough when he is regularly connected.
>>> So this fails to address the problem :-(
>>>
>>
> Best regards from Paris,
> Eric Chatonet.
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