Writing a telnet client

Posted by MAC on Stack Overflow See other posts from Stack Overflow or by MAC
Published on 2010-03-25T21:37:48Z Indexed on 2010/03/25 21:43 UTC
Read the original article Hit count: 279

Filed under:

telnet

|

c

HI,

I have a device that exposes a telnet interface which you can log into using a username and password and then manipulate the working of the device.

I have to write a C program that hides the telnet aspect from the client and instead provides an interface for the user to control the device.

What would be a good way to proceed. I tried writing a simple socket program but it stops at the login prompt. My guess is that i am not following the TCP protocol.

Has anyone attempted this, is there an opensource library out there to do this?

Thanks

Related posts about telnet

Telnet does not give a response

as seen on Server Fault - Search for 'Server Fault'
Some wireless access points are acting a little weird, so I want to reboot them every couple of hours. Luckily there exists a security flaw which lets me login as root through telnet when using port 1111 (without username and password). Now I want to use that to let my QNAP NAS execute the reboot… >>> More
Ougoing telnet: Unable to connect to remote host: Connection refused

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I am trying to telnet from Ubuntu server (running Maverick) on ec2 to another machine I have set up not on ec2 - we'll call it "server-x". The two machines are connected via vpn. I can ping from the ec2 machine to server-x no problem. On another machine also on the vpn but also not on ec2 I can… >>> More
Why do I get 'use: command not found' when I run my Perl script?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm new to Perl. And I have used following code from one forum to connect to one of the server. but throwing error messages [root@Cus]# cat tt.pl #!/usr/bin/perl use Net::Telnet; $telnet = new Net::Telnet ( Timeout=>2, Errmode=>'die'); $telnet->open('10.0.0.28'); $telnet->waitfor('/login:/'); $telnet->print('administrator'); $telnet->waitfor('/Password:/'); $telnet->print('test'); $telnet->waitfor('/switch8-12>/'); $telnet->print('whoamI'); $output=$telnet->waitfor('/switch8-12>/'); print… >>> More
Connect to remote server

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi All, I'm new to perl. And I have used following code from one forum to connect to one of the server. but throwing error messages [root@Cus]# cat tt.pl #!/usr/bin/perl use Net::Telnet; $telnet = new Net::Telnet ( Timeout=>2, Errmode=>'die'); $telnet->open('10.0.0.28'); $telnet->waitfor('/login:/'); $telnet->print('administrator'); $telnet->waitfor('/Password:/'); $telnet->print('test'); $telnet->waitfor('/switch8-12>/'); $telnet->print('whoamI'); $output=$telnet->waitfor('/switch8-12>/'); print… >>> More
Code to connect to remote server using perl

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm written small code to connect to remote server using perl but observing error messages #!/usr/bin/perl -w use Net::Telnet; $telnet = new Net::Telnet ( Timeout=>60, Errmode=>'die'); $telnet->open('192.168.50.40'); $telnet->waitfor('/login:/'); $telnet->print('queen'); $telnet->waitfor('/password:/'); $telnet->print('kinG… >>> More

Developer IT