Re: [Chicken-users] Chicken Gazette - Issue 10

[F. Wittenberger]

Am Dienstag, den 02.11.2010, 14:52 +0100 schrieb Moritz Heidkamp:
> Hi Jörg,
> 
> Jörg "F. Wittenberger" <address@hidden> writes:
> > Though one thing I haven't been able to figure out: is there a way
> > encrypt and sign zmg messages?  Or would I have to add that on top?
> 
> funny you ask, this has also come up on the ZMQ mailing list
> recently. ZMQ is just a transport/messaging system, it doesn't try to do
> more than just that and guarantee you that only complete messages will
> arrive at your end. What you put into the messages is up to you.

That's tough, unfortunately.

In the BALL/Askemos code base, the source signature (x509 only by now)
of is an important property used to gain confidence about the current
network wide state.

> I have an extension for the mailbox-threads egg which adds support for
> remote messaging between thread mailboxes via ZMQ. I'll check it in
> later today, maybe it is useful for you!

Given no trust in the message source, I'll only be able to replace some
low level code.   Is it true (that's how I read the egg API) that ZMO
will only distribute/collect messages?  By "only" I mean "not do any
removal of re-transmits, no counting of majority of messages delivered
or any other handling of synchrony issues"?  (I.e., is it really just a
transport level thing?)

>From skimming across the zmq website one more question.  I always asked
myself what the point of the poll(2) call is.  More efficient that
select(2)?  Apparently that's the case.  ...  Which, given that I have
some Scheduler patches still pending, I'm almost about to switch those
to use pool instead of select, to make both a one time effort to
integrate.

/J