Logged in host IP address?

For use in shell script

[physics]

I want to write a bash shell function to be used on a remote system that:
- Gets the IP or host name that I'm currently logged into the system from
- sends the specified file from the remote system to said host

If I know the host name I can do it:

function scpme()
{
 scp $1 [e-mail]:./$2
}

But I want it to work regardless of where I'm logged in from, not just the hardcoded my.home.mahcine.hostname.net.

So the simple question is: is there a shell variable like $REMOTE_HOST that stores the IP I'm logged in from?

[py9jmas]

SSH in to the remote system and have a look at
$SSH_CLIENT
$SSH_CONNECTION
You should be able to do what you want from there.

[physics]

Thanks. Is the user name of me on my home system available also somehow? I.e. if on the remote host I'm me2 and at home I'm me is there a way to get me on the remote host?

[py9jmas]

A read of the ssh man page revealed:

Additionally, ssh reads $HOME/.ssh/environment, and adds lines of the format ``VARNAME=value'' to the environment if the file exists and if users are allowed to change their environment. For more information, see the PermitUserEnvironment option in sshd_config(5).

which sounded promising - you could pass whatever you liked to the environment on the server. However, PermitUserEnvironment defaults to No, at least on FreeBSD. Nothing else looks much use, I'm afraid.