What does the remote_id mean in CreateRemoteDisplay(remote_id) in gdm?

[Rathnavel_J_N]

Hi
I’m working on remote desktop app
org.gnome.DisplayManager.RemoteDisplayFactory.CreateRemoteDisplay call.

My question is:
1. What does the remote_id mean in the following D-Bus method call?

org.gnome.DisplayManager.RemoteDisplayFactory.CreateRemoteDisplay(remote_id)

[Sid]

Probably the ID of the remote display, when gdm operates in headless mode.

Refer following git commit logs for more details.

$ git remote -v
origin	https://gitlab.gnome.org/GNOME/gdm (fetch)
origin	https://gitlab.gnome.org/GNOME/gdm (push)

$ git log --grep=remote.id

commit ab0431bb9
Author:     Joan Torres <joan.torres@suse.com>
AuthorDate: Fri Mar 22 17:45:08 2024 +0100
Commit:     Ray Strode <halfline@gmail.com>
CommitDate: Fri Jun 7 14:15:57 2024 +0000

    manager: Update remote-id on reauth from RemoteDisplay
    
    Now two headless sessions are compatible.
    On reauthentication, the login display will get the property
    of its reauth_caller_pid.
    Now when a session is reauthenticated, on "Reauthenticated" signal it
    is given the pid_of_caller property. This way it can be known from which
    login display it has been reauthenticated, when multiple login displays
    attempted to reauth the same user.
    On succesfull reauthentication, get the login display using that
    property. If that display is remote, set the "remote-id" of the login
    display to the user display, this makes the g-r-d daemon-system, handover
    an RDP client to that reauthenticated session.

commit 0541d62d1
Author:     Joan Torres <joan.torres@suse.com>
AuthorDate: Fri Sep 1 19:10:12 2023 +0200
Commit:     Ray Strode <rstrode@redhat.com>
CommitDate: Fri Nov 3 16:04:31 2023 -0400

    manager: Create remote displays for user sessions started from remote login screens
    
    If a login screen is running on a remote display, the session that gets
    started from that login screen should have a remote display associated
    with it as well, instead of a local display object.
    
    Furthermore, the two remote displays should have a comment remote_id so
    there's a clear trail from one to the other.
    
    This commit does that.

commit 942227209
Author:     Joan Torres <joan.torres@suse.com>
AuthorDate: Wed Jul 13 17:35:21 2022 +0200
Commit:     Ray Strode <rstrode@redhat.com>
CommitDate: Fri Nov 3 16:02:24 2023 -0400

    Introduce Remote Display Factory
    
    This commit adds a new class used to create remote displays.
    
    It exposes a RemoteDisplayFactory interface over the bus to create remote displays
    with a CreateRemoteDisplay method. This method sets the received remote_id to
    on the created RemoteDisplay.
    
    When it creates a remote display, it stores it in the display store and
    prepares it (which makes the remote display create a headless login screen)