Detecting lost connections

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2 total messages Started by Eelke Tue, 01 Nov 2005 10:15

#3272

Author: Eelke
Date: Tue, 01 Nov 2005 10:15

10 lines
1403 bytes

I am writing a service application that communicates with an application 
  on a PDA. The PDA is ofcourse the client and the service is the 
server.In the service I use WSAEventSelect to get events when the 
connection is closed or data is available.

When the app on the PDA closes the connection the server gets the close 
event. However when the PDA is reset the server never gets the close 
event. Are there other ways to detect the connection has been lost?

Eelke

Re: Detecting lost connections

#3145

Author: chenzero
Date: Sun, 06 Nov 2005 02:28

23 lines
1943 bytes

"Eelke" <e.klein@mplussoftware.nl>
??????:43673fdc$1@newsgroups.borland.com...
> I am writing a service application that communicates with an application
>   on a PDA. The PDA is ofcourse the client and the service is the
> server.In the service I use WSAEventSelect to get events when the
> connection is closed or data is available.
>
> When the app on the PDA closes the connection the server gets the close
> event. However when the PDA is reset the server never gets the close
> event. Are there other ways to detect the connection has been lost?
>
> Eelke

Hi Eelke,
Usually, you can send a heart-beaten msg between service and PDA in a short
period. if the service timeout to receive the msg, the service can assume
the
connection is broken(PDA is reset).
Certainly, this increases the complexity of the program.

Good luck,
chenzero

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