[32542] in Kerberos
Re: UDP and fragmentation
daemon@ATHENA.MIT.EDU (Greg Hudson)
Tue Aug 3 16:36:10 2010
From: Greg Hudson <ghudson@mit.edu>
To: Victor Sudakov <vas@mpeks.no-spam-here.tomsk.su>
In-Reply-To: <i35lsj$fv$1@relay.tomsk.ru>
Date: Tue, 03 Aug 2010 16:35:55 -0400
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On Mon, 2010-08-02 at 01:42 -0400, Victor Sudakov wrote:
> Please tell me how on earth does the KDC know that the packet has been
> fragmented? Packets are fragmented and reassembled on the network
> level (IP level), the fragmentation process should be opaque to UDP
> and the application, shouldn't it?
Yes, it should.
It's possible that there are cases where one IP-layer network device
fragments the packets and another IP-layer network device throws away
fragments (if the fragments are received out of order, or all of the
time). But the KDC process does not care whether a UDP packet was
fragmented or not.
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