[dtn] (no subject)

[Loiseau lucien <[e-mail]>]

Hi,

I noticed that since bpbis-10, the block data length was removed from
the Canonical Block Header, I imagine to reuse the length given as a
header of the CBOR byte string that constitutes the payload of the
block.

However CBOR encoding authorizes a byte string to be "indefinite" so
that the cbor header would be -1 and then follows a series of byte
chunk with definite size. In that case, it may be impossible to
allocate memory for the whole payload, instead we would have to
readjust buffer as chunks are coming in. Another limitation with a
payload encoded as an indefinite cbor byte string is that it would be
impossible to refuse a large bundle until we fully decoded it or hit
the limit.

Best Regards,
Lucien