[dtn] MTCP PDU Length Field
Felix Walter <felix.walter@d3tn.com> Tue, 26 March 2019 19:02 UTC
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From: Felix Walter <felix.walter@d3tn.com>
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Date: Tue, 26 Mar 2019 20:02:36 +0100
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Subject: [dtn] MTCP PDU Length Field
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Hi, Concerning draft-ietf-dtn-mtcpcl-00: As mentioned in the WG session today I wondered whether the length of the serialized bundle is required as a separate array item in the MPDU (see [1]). According to the CBOR spec [2], the encoded byte string already contains a length. From an implementation perspective, having an additional length field should not be a problem: Both values encode the length of the encapsulated (serialized) bundle and, by that, do not depend on each other. (You may remember the discussion about the bundle block data length field last year where this was the case. This was also the reason why I stumbled upon this when reading the draft again.) Thus, if I'm not mistaken, couldn't we reduce the MPDU to a single definite-length CBOR byte string? Felix [1] https://tools.ietf.org/html/draft-ietf-dtn-mtcpcl-00#section-3.2 [2] https://tools.ietf.org/html/rfc7049#section-2.1 -- Dipl.-Ing. Felix Walter Chief Technology Officer D3TN GmbH E-Mail: felix.walter@d3tn.com Web: https://d3tn.com Address: D3TN GmbH Leon-Pohle-Str. 2 01219 Dresden Commercial Register: District Court Dresden Register Number: HRB 34957 VAT ID Number: DE303348407 Managing Directors: Marius Feldmann, Paul Seidler
- [dtn] MTCP PDU Length Field Felix Walter
- Re: [dtn] [EXTERNAL] MTCP PDU Length Field Burleigh, Scott C (312B)