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- - [ANNOUNCE] Keep Wi-Fi power-management off during SSH/SFTP sessions (https://talk.maemo.org/showthread.php?t=80529)

[ANNOUNCE] Keep Wi-Fi power-management off during SSH/SFTP sessions

This is a dirty workaround, but no one seems to find a more elegant way.

Put these lines in your /etc/ssh/sshd_config

Code:

Compression no #optional

UseDNS no #optional

ForceCommand /usr/lib/openssh/ssh-session

Create /usr/lib/openssh/ssh-session

Code:

#!/bin/sh



if [ $USER = root ]; then

  IFCONFIG=ifconfig

  MGMT=/usr/lib/openssh/ssh-power-management

else

  IFCONFIG="sudo ifconfig"

  MGMT="sudo /usr/lib/openssh/ssh-power-management"

fi



WLAN_IP=$($IFCONFIG wlan0 | sed -n 's/.*inet addr:\([0-9.]\+\).*/\1/p')

SSH_IP=$(echo $SSH_CONNECTION | cut -d ' ' -f 3)



if [ "$WLAN_IP" = "$SSH_IP" ]; then

  ps -f | grep /usr/lib/openssh/ssh-power-management | grep -qv grep

  if [ $? -eq 1 ]; then

    $MGMT &

  fi

fi



if [ -n "$SSH_ORIGINAL_COMMAND" ]; then

  eval $SSH_ORIGINAL_COMMAND

else

  $SHELL

fi

Create /usr/lib/openssh/ssh-power-management

Code:

#!/bin/sh



if [ $USER = root ]; then

  IWCONFIG="iwconfig"

else

  IWCONFIG="sudo iwconfig"

fi



while [ $(lsof -a -i4 -a -i :ssh | grep ESTABLISHED | wc -l) -gt 0 ]; do

  $IWCONFIG wlan0 power off

  $IWCONFIG wlan0 txpower 100mW

  sleep 20

done



$IWCONFIG wlan0 power on

$IWCONFIG wlan0 txpower 10mW

You need to have wireless-tools installed (and sudser if you don't want to add an appropriate entry to /etc/sudoers.d/).

Then run

Code:

sudo chmod +x /usr/lib/openssh/ssh-session

sudo chmod +x /usr/lib/openssh/ssh-power-management

sudo /etc/init.d/ssh restart

Authentication process will remain slow and you'll notice a small gap after login; then the lags will disappear until you close all active ssh/sftp connections.
The 20 seconds timeout for invoking iwconfig isn't meant to be precise, test and report your measures.

---------------------------

If you use ssh server only at home, you may also want to do this:

Create /etc/network/if-up.d/ssh (replace YOUR_AP_ESSID with the name of your access point)

Code:

#!/bin/sh



if [ "$ICD_CONNECTION_TYPE" = "WLAN_INFRA" ] ; then

        KEY="/system/osso/connectivity/IAP/$ICD_CONNECTION_ID/name"

        AP=$(/usr/bin/gconftool -g "$KEY")

        if [ "$AP" = "YOUR_AP_ESSID" ] ; then

                /etc/init.d/ssh start

        fi

fi



exit 0

and /etc/network/if-down.d/ssh

Code:

#!/bin/sh



/etc/init.d/ssh stop



exit 0

Comment out the corresponding lines in /etc/event.d/sshd

Code:

#start on stopped rcS



console output



#respawn



pre-start script

    if [ ! -d /var/run/sshd ] ; then

        mkdir /var/run/sshd

        chmod 755 /var/run/sshd

    fi

end script



exec /usr/sbin/sshd -D

Then run

Code:

sudo chmod +x /etc/network/if-*.d/ssh

sudo update-rc.d -f ssh remove

Re: [ANNOUNCE] Keep Wi-Fi power-management off during SSH/SFTP sessions

did this followed your steps now i cant apt-get anything FAPMAN or APPMAN dont work

i even uninstalled openssh

thanx alot! now i gotta reflash

Re: [ANNOUNCE] Keep Wi-Fi power-management off during SSH/SFTP sessions

Quote:

Originally Posted by T4UR14N (Post 1137940)

did this followed your steps now i cant apt-get anything FAPMAN or APPMAN dont work

i even uninstalled openssh

thanx alot! now i gotta reflash

It works fine for me. thanks Bad_Habit!

But T4UR14N, whatever your problem is, it has nothing to do with what was posted: there is nothing there that interacts with apt.

Possibly you put a horrendous typo into something in /etc/network/if-up.d/ and now you cant get a net connection??

You could avoid these sorts of problems generally by not duplicating other peoples' operating system modifications until you can reasonably understand what those changes are.
Commands that start with "sudo", or that modify files in /etc or /usr should sound off warning bells in your head.
On the other hand, breaking your linux system can be a great way to learn about it -- just understand that when you do, it will be your own fault!!

(These steps can be mostly undone by just doing them in reverse, that is, remove the 4 NEW files that you created,
Then to fix sshd, remove the 2 new # marks from /etc/event.d/sshd, and get rid of any lines added to /etc/ssh/sshd_config,
then the knowledgeable or brave soul would have to do
sudo update-rc.d -f ssh defaults)

Re: [ANNOUNCE] Keep Wi-Fi power-management off during SSH/SFTP sessions

Quote:

Originally Posted by octagonhead (Post 1138093)

thanks but this is where backup menu comes in handy

Re: [ANNOUNCE] Keep Wi-Fi power-management off during SSH/SFTP sessions

Quote:

Originally Posted by T4UR14N (Post 1138098)

thanks but this is where backup menu comes in handy

That's no Unix way, you'd better install syslogd & klogd (using usb to transfer debs) and check out /var/log/syslog - debugging your system is the only way to forget BackupMenu :)