Dial - Context with timeout

[estutzenberger]

If I call the dial function with a context that times out, this timeout does not appear to be applied within the Dial function. The Dial function in hci.go relies on a dialerTmo struct field. Is there a proper way to time out a connect request?

If not, then I propose the timeout be pulled via the Context Deadline function. This should probably override the timeout specified by dialerTmo and then set it back upon exiting the function.

Thoughts? Perhaps I missed something elsewhere in the code. I'm happy to made the adjustments and file a PR.

[estutzenberger]

Looking at the code again, an alternate option (possibly a better option) is for the case <-ctx.Done(): to also attempt to cancel the connect request rather than simply returning an err.

[moogle19]

@estutzenberger
I just made a Pull Request regarding this problem.
It would be nice if you could take a quick look at it and check if it will fix you problem.