Re: Telnet Client search

Sorry to hear about Standard SDK (but not sorry about MFC!). It sounds like
you're being required to run under a Windows CE core license, as opposed to
professional, which prevents you from including some components. Doing this
keeps the cost of your license down.

I can't judge about the mental cost of doing NAT and making your CE box act
as a gateway (but there is a gateway sample 'platform' that you can select
when building your CE device), never having had a requirement for it.

Telnet is a very simple protocol and, if you're experienced with WinSock,
you might be able to code up a Telnet client that does everything you need
it to do in a couple of days. The main challenge of writing a Telnet client
is going to be negotiating with the Telnet server for some of the
handshaking settings. It certainly could not hurt to have whatever sample
code you can find on the Web for doing that in Win32/WinSock. It's pretty
much *got* to be calling just send() and recv() in there somewhere, so the
code to do that negotiation should be reusable with only a little effort.
Now, being both the server to an outside client and the client to your
embedded Linux server is another level of complexity.

It seems to me that the best solution is to provide some means for external
clients to connect to the embedded Linux server. That solves this problem
without creating more code for you to maintain, while also allowing future
adjustments more easily than some custom code. If it were me, that's the
road I'd start on. If I found that I couldn't do that without changing my
license, then at least you have the justification for doing that to present
to whomever it is that's currently saying you can't do it. Once you get it
to work, you then have a general-purpose method of bridging between the
Linux box's domain and the rest of the world. If you have to do FTP
tomorrow between external clients and the embedded Linux box, it's no more
difficult than setting a few registry settings on the CE box. If you go
with some sort of custom Telnet program that forwards data between the two
subnets, any change of what's needed means you get to start over, this time
with FTP.

Paul T.

"Roger Williamson" <RogerWilliamson@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message news:0B2F1016-59A0-4553-9840-D373DA03D217@xxxxxxxxxxxxxxxx
Paul,

You would think that searching the internet would be a valid option, but
it seems not to be. Unfortunately, I'm running under a system where I'm
not
allowed to have MFC, Standard SDK, and a number of other CE features which
come standard. I also need something without a GUI component, something
which would/could run strictly be a terminal application.

Given all of that, do you think that it would be simpler for me to just
figure out how to do the NAT work needed for an external telnet client to
find a telnet server on the CE platform's private network?

Thanks for the help,
Roger

"Paul G. Tobey [eMVP]" wrote:
Seems like Google would be able to find you a Win32 Telnet client in
source
form with no problem, if not a Windows CE-specific one. You might need
to
get a couple of candidates and verify which WinSock APIs they are using
to
make sure that the porting task will be easy, but I wouldn't think that
more
than a few days would be necessary, if you are knowledgeable in network
programming for Windows.

Paul T.


.

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