I do not believe they have given permission to talk extension with other teams as of this post.
So this topic has been rattling around my head in general. I would guess that in this particular case permission hasn't been granted because we are still negotiating.
But is it possible a team prevented discussions to hide the fact the player is asking for crazy money, which could potentially hurt his value since it's obvious teams wouldn't be able to re-sign him?
And I have a feeling Chris is asking for a lot. All you need is a team with decent cap next season that is banking on the TV money rolling in the following year. Hot seat GMs in particular will be making waves to just save their jobs.