Bounce user over to mobile site, but still allow “full site” view

Question

This is scenario I'm going for:

User visits the site, site.com, meta tag detects that the user is on a mobile device, and bounces the user over to m.site.com. Then, the user sees a link for "View full site," and clicks on it.

But then, the site bounces the user over again.

Is there a clean way of handling this? Allowing the user to choose which version he/she wants to see, but by default, first going to the mobile site?

Thanks!