telnet / telnetd

QNX Newsgroups (Archives) qdn.public.qnxrtp.embedded
1

Greetings to the community.

I would appreciate a tip on how to launch the telnet service. It …mostly…
works, however not quite.

In my boot image I launch “inetd”. In the /etc/inetd.conf file I have just
two entries, one for ftp and one for telnet. Ftp works fine. The entry for
telnet is:

telnet stream tcp nowait root /proc/boot/telnetd in.telnetd -Q -n

When a remote host attempts to telnet, it never gets a login window; it
hangs. The process status on the embedded PC shows the following command:

login -h 192.168.0.2 -p

I’m guessing the I haven’t instantiate a login shell correctly, or missing
something simple. This being my first project with QNX Neutrino, any
suggestions would be appreciated.

Here are parts of my build script:


[+script] startup-script = {

Start up some consoles

devc-con -n4 &
reopen /dev/con1
display_msg Welcome to Neutrino DiskOnChip!


…

\

Some common servers

pipe &
mqueue &
devc-pty &

…

starup network services to FTP will work

inetd

\

startup our app

ksh -c “startup.ksh &”

\

Start some extra shells on other consoles

reopen /dev/con2

[+session] sh &

reopen /dev/con3

[+session] sh &

Start a high priority shell just in case…

reopen /dev/con4

[pri=25 +session] sh &



\

Start the main shell

reopen /dev/con1
[+session] sh

[+session] login -p

}


\

for launching the Ethernet

io-net

\

network services

inetd
telnet
telnetd
ftpd
tftpd
ftp




Regards,

Steve Wagner

2

Steve Wagner wrote:

Greetings to the community.

I would appreciate a tip on how to launch the telnet service. It …mostly…
works, however not quite.

In my boot image I launch “inetd”. In the /etc/inetd.conf file I have just
two entries, one for ftp and one for telnet. Ftp works fine. The entry for
telnet is:

telnet stream tcp nowait root /proc/boot/telnetd in.telnetd -Q -n

When a remote host attempts to telnet, it never gets a login window; it
hangs. The process status on the embedded PC shows the following command:

login -h 192.168.0.2 -p

I’m guessing the I haven’t instantiate a login shell correctly, or missing
something simple. This being my first project with QNX Neutrino, any
suggestions would be appreciated.

Here are parts of my build script:


[+script] startup-script = {

Start up some consoles

devc-con -n4 &
reopen /dev/con1
display_msg Welcome to Neutrino DiskOnChip!


…

\

Some common servers

pipe &
mqueue &
devc-pty &

…

starup network services to FTP will work

inetd

\

startup our app

ksh -c “startup.ksh &”

\

Start some extra shells on other consoles

reopen /dev/con2

[+session] sh &

reopen /dev/con3

[+session] sh &

Start a high priority shell just in case…

reopen /dev/con4

[pri=25 +session] sh &



\

Start the main shell

reopen /dev/con1
[+session] sh

[+session] login -p

}


\

for launching the Ethernet

io-net

\

network services

inetd
telnet
telnetd
ftpd
tftpd
ftp




Regards,

Steve Wagner


\

I’m not into the embedded stuff with QNX, but in RTP, i would guess it’s
trying to resolve your ip, which maybe isn’t resolvable and telnetd
usually hangs for some time, i think there was a option to disable this,
not sure though.
Try waiting a while see if it shows up. if it do, try either locating
that option or add your ip into the /etc/hosts file.

/Johan

3

Hi Steve…

How do you start the io-net server? You should do something like:

tcp/ip with a NE2000 Ethernet adaptor

io-net -dne2000 -pttcpip if=ndi0:10.0.1.172 &
waitfor /dev/socket

You should change the ne2000 for the ethernet device of your board.

also, you have to include files from the /etc directory such as:

[data=copy] # All executables that can be restarted

go below.

/etc/services = {
ftp 21/tcp
telnet 23/tcp
finger 79/tcp
pdebug 8000/tcp
}

/etc/inetd.conf = {
ftp stream tcp nowait root /bin/fdtpd fdtpd
telnet stream tcp nowait root /bin/telnetd telnetd
finger stream tcp nowait root /bin fingerd
pdebug stream tcp nowait root /bin/pdebug pdebug -
}

and similarly you should include:

/etc/passwd
/etc/systems <<=== [ include every thing ]
/etc/hosts
/etc/services
/usr/local/terminfo
/etc/termcap

Now, if you have an ethernet device that uses devn-pcnet.so, then you
should be aware that I have had problems with this chip and remote
telnet.

Regards…

Miguel.

Steve Wagner wrote:

Greetings to the community.

I would appreciate a tip on how to launch the telnet service. It …mostly…
works, however not quite.

In my boot image I launch “inetd”. In the /etc/inetd.conf file I have just
two entries, one for ftp and one for telnet. Ftp works fine. The entry for
telnet is:

telnet stream tcp nowait root /proc/boot/telnetd in.telnetd -Q -n

When a remote host attempts to telnet, it never gets a login window; it
hangs. The process status on the embedded PC shows the following command:

login -h 192.168.0.2 -p

I’m guessing the I haven’t instantiate a login shell correctly, or missing
something simple. This being my first project with QNX Neutrino, any
suggestions would be appreciated.

Here are parts of my build script:

[+script] startup-script = {

Start up some consoles

devc-con -n4 &
reopen /dev/con1
display_msg Welcome to Neutrino DiskOnChip!

…

Some common servers

pipe &
mqueue &
devc-pty &

…

starup network services to FTP will work

inetd

startup our app

ksh -c “startup.ksh &”

Start some extra shells on other consoles

reopen /dev/con2

[+session] sh &

reopen /dev/con3

[+session] sh &

Start a high priority shell just in case…

reopen /dev/con4

[pri=25 +session] sh &

Start the main shell

reopen /dev/con1
[+session] sh

[+session] login -p

}

for launching the Ethernet

io-net

network services

inetd
telnet
telnetd
ftpd
tftpd
ftp

Regards,

Steve Wagner

–

my opinions are mine, only mine, solely mine, and they are not related
in any possible way to the institution(s) in which I study and work.

Miguel Simon
Research Engineer
School of Aerospace and Mechanical Engineering
University of Oklahoma
http://www.amerobotics.ou.edu/
http://www.saic.com