How Do I Create Telnet Server To Emulate Dos Program

Question

0.00/5 (No votes)

See more:

Hi,

recently i'm working in sap develpment.

i need to emulate SAP console program via telnet server
so my hanheld device can telnet to that program

i browsed and found this georgiasoft[^] that support VT220 to support F1 F2 F3 etc key in handheld. but this is commecial one.

so i decide to make my own telnet server, but i just found sample code to build simple telnet server that just wait for string and deliver another string.

i have no idea, how to emulate the sapconsole program in telnet client. and where is the VT220 takes part.

Thank you

Posted 3-Aug-14 21:27pm

Irvan Munadi

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Rob Philpott · Answer 1 · 2014-08-03T22:51:00

I've written one recently, and it's not as easy as it sounds.

To get a basic console session up, you can just use a TcpClient and attach some sort of stream reading/writing thing to it.

It gets complicated by the fact that when you connect to a telnet server, it will send a list of what it can and can't do, optionally what it'd like to do. You need to intercept these messages and respond appropriately. WILL, WONT, DO, DONT.

Then, telnet supports different types of terminals. You may want to negotiate screen size etc. There's mapping of various keys to escape sequences etc.

If possible, I'd considering abandoning the challenge, but if necessary you'll need to get very familiar with a number of RFCs governing the standard.