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xaptum / xtt-spec

Working draft for the XTT RFC
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Update spec to reflect record-layer-like header #3

Open zanebeckwith opened 7 years ago

zanebeckwith commented 7 years ago

We want to use a constant header format for all messages (both handshake and session), to both ease parsing and allow for long-message framing.

This means the header should include the total-packet-length in a static location (to ease parsing), even for handshake messages whose structure and length are known.

It should also include framing info (e.g. frame number, total frame count). Cf. the (D)TLS specs for inspiration.

zanebeckwith commented 5 years ago

The spec now does use a common header format, that has the total length in a static location, for all message types.

However, the framing information question has not been resolved. That should probably be a session-only field(s).