How to get & use the iPXE local (current) path ?

[ruymbeke]

Hello,
I am using iPXE with a tree of scripts to allow the user to select a boot
from various menu options. From the main path / script provided originally
by the dhcp server the user can then navigates or chain from folder to folder.
Is there a way to display and use the local (current) path used by iPXE ?
Or in other words, what is name of the variable I should use to access
or "show" the base path when a relative parameter is provided to chain ?
iPXE is a great project ! Thank you very much for your time and support.
Best Regards,
Gilles

FYI:I am using the http protocol to navigate through the various menus
and the "filename" variable always shows the initial dhcp data.