On Wed, Jan 20, 2021 at 10:13:25PM +0000, Keller, Jacob E wrote:
> It makes sense to remove forwarding, but I am not sure I understand the 
> justification for removing access to subscriptions.. if the subscription is 
> for read only data, why doesn't it make sense to allow that over the read 
> only socket?

The subscription itself requires some state. If we say the new socket
is safe to be accessed by untrusted applications, we need to be really
sure they cannot do anything bad, e.g. create a large number of
subscriptions to crash ptp4l or break subscriptions on the "rw"
socket. Such issues would become security issues.

There might be a way to provide subscriptions on the "ro" socket, but
they need to be separate from the "rw" subscriptions and have some
limiting implemented.

I'd like to start with a minimal feature set that we can be
comfortable with and maybe add other features later if there is a
demand for them.

-- 
Miroslav Lichvar



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