Grant Edwards wrote: > You don't have to start from scratch. The telnet module has > hooks built-into it1 so that you can have it call your routines > to handle option negotiation. I did it once to impliment some > extra Telnet protocol features, and it wasn't difficult.
Ok, you've inspired me to give it a try. First, I am assuming that you mean writing a custom callback function to send to Telnet.set_option_negotiation_callback(callback). Or did you mean writing a subclass of Telnet? Can someone provide an example of a callback function that I might use as a template for writing mine?
This is unfamiliar territory for me, but as near as I can tell, the options in question are:
0, binary transmission
1, echo
3, suppress go ahead
23, send location
And it may be that not all of these are critical, but if so, I don't know how to tell which is which.
Eyal Lotem wrote: > I think I have a much simpler solution for you guys.. > Assuming you can run arbitrary code on the proprietary > server.
Actually I cannot. The server runs a second-party information system, the primary access to which is third-party terminal emulator software that uses telnet connections. What I am trying to do is emulate this emulator. :-)
Jp Calderone wrote: > cmd.exe is not a command line program. It's a terminal (emulator). > You might be able to use the telnet program, though.
Yes, I see that now. Thanks.
> Before doing this, > I'd recommend looking at Twisted's telnet support (both > the version in 1.3 and the version that will be in 2.0), > which actually supports option negotiation in a > reasonable way.
I've been wanting to get acquainted with Twisted for awhile now, so this might be a good time to do so. I think I will give Grant's idea a whirl, but if I get bogged down there, I will definitely look at Twisted's telnet support. BTW, do you know if Twisted's option negotiation uses a callback function? I might download it just to take a look, even if I don't use it directly.
Thanks, Donnal Walter Arkansas Children's Hospital
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