[TLS] draft-ietf-tls-rfc4347-bis-00.txt

[Robin Seggelmann <[e-mail]>]

Hello all,
I was just checking the draft for changes relevant to DTLS over SCTP  
and came across the following new paragraph:

- For DTLS over TCP or SCTP, which automatically fragment
   and reassemble datagrams, the upper layer protocol
   SHOULD be informed that the PMTU is effectively infinite.

What does 'effectively infinite' mean? TLS limits the message size to  
2^14 bytes, so shouldn't this limit also apply to DTLS? If the  
message size really is arbitrary, doesn't this affect some cipher  
algorithms? Or should the application then ignore the announced  
'infinite' PMTU and limit the message size anyway?

Regards,
Robin
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