Interesting because RFC4347 IMHO states clearly that IP fragmentation
(IP not UDP) must be avoided and thus dtls must determine the MTU.
** Sent from my tiny phone keyboard **
On May 25, 2010, at 11:03 PM, <[email protected]> wrote:
Tim Evens wrote:
Correct, in RFC5426 the max size is 64K which is the max length in
UDP. UDP sizes of greater than MTU are only achievable via IP layer
fragmentation, as you also indicated. I'm under the impression that
DTLS does NOT support IPv4 fragmentation since in RFC4347 it states
in Section 4.1.1 "Each DTLS record MUST fit within a single
datagram."
AFAIK when running DTLS over UDP, "datagram" here refers to UDP
datagrams, not IP packets (and one UDP datagram can be split
to several IP packets).
Best regards,
Pasi
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