What packet modes do we support?
hmurray at megapathdsl.net
Mon Jan 8 21:50:47 UTC 2018
> The page that covers differences from Classic - docs/ntpsec.txt. It's under
* peer mode has been removed. The keyword peer in ntp.conf is now
just an alias for keyword server.
* Broadcast- and multicast client modes, which are impossible to
secure, have been removed. Broadcast (but not multicast) service can
still be enabled, though this is a deprecated and unsupported mode
of operation and may be entirely removed in a future release.
I think that means that ephemeral mode is no longer used. (It used to be
tangled up with using the pool as well as peer and broadcast client.) That
will allow a layer of cleanups throughout the documentation - mostly
That greatly simplifies the receive packet processing. The MATCH_ASSOC macro
and its table in the top of ntp_peer can be dropped.
We only expect 3 modes of packets:
Mode 6 gets diverted off to separate logic very early.
Mode 3 is requests. We answer them.
Mode 4 is responses to our requests.
Do we want to process mode 1? (Other end is trying to peer with us.)
I think it works to answer them right now, without setting up a peer block to
These are my opinions. I hate spam.
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