[ntp:security] [Bug 3453] Interleaved symmetric mode cannot recover from bad state

bugzilla-daemon at ntp.org bugzilla-daemon at ntp.org
Tue Jan 30 10:29:05 UTC 2018


https://bugs.ntp.org/show_bug.cgi?id=3453

--- Comment #4 from Harlan Stenn <stenn at ntp.org> 2018-01-30 10:28:48 UTC ---
(In reply to comment #3)
> The problem that I see here is that if this affects interleave mode then Test2
> may be wrong. The comment before that code says if found, flip and
> resynchronize. Now we need to know where that happens because it's not here. It
> also requires a review of what a inteleaved packet looks like. The test itself
> may very well need to be changed.
> 
> Danny

TEST2 means "origin timestamp problem", and XBOGUS means there's a slightly
more general problem with an interleave packet.

Dave says it's reasonable to always stay in interleave mode if we get in to
interleave mode, but in the past the intent was to flip back to basic mode if
that's what the other side wants.

I'm still digging in to this.

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