PlutoPlanet <info@bitart.at> writes:

>Hello World,

>I have written a client-application in C which runs as daemon and
>talks to a server via TCP/IP.

>My client is connected to the internet by a gprs-modem. Right now I
>just start the modem and start pppd (with chat). After that I can
>start the daemon which connects to the server. That is not a very good
>solution, because a gprs and/or ppp connection can break :)

>What is the best way to keep such a connection alive?
>How can I determine from my C-application if a gprs/ppp connection is
>alive or not?
>How can I determine if pppd is currently connecting/disconnecting?

>Any other ideas or suggestions?

The company I'm working for does this (PPP over GPRS, and a TCP/IP
client/server solution) to provide in a production environment a
solution used by public libraries which run a branch of the
library as a so called 'book bus' (a real bus moving around in
town and reader can borrow books in the bus and return them
next week again). The (UNIX-) server runs in the city computer
centre while the client in the bus connected to it runs in XP
having a Linux box for the PPP over GPRS.

The easiest way in the client to detect that all is fine, is that
the used protocol over TCP/IP is working fine.

matthias
--
Matthias Apitz
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