Get IP of controller machine

Hi,

Is there an easy way to get the IP address of what controller machine is running the test?  I'm looking for something similar to the lr_whoami function.

1.  I can use openSSH to copy a file with the ip address but that is a little messy as I'd need a localhost scipt to run and only do that.

2.  VTS is not an option as that's why I need the controller IP :)

Many thanks,

J