[quicwg/base-drafts] use TRANSPORT_PARAMETER_ERROR when authenticating connection IDs (#3691)

[Marten Seemann <[e-mail]>]

As discussed in https://github.com/quicwg/base-drafts/pull/3499/files#r422775281, most of the errors that can occur when authenticating connection IDs should be TRANSPORT_PARAMETER_ERRORs, not PROTOCOL_VIOLATIONs.

The guiding principle here (as we apply it for FRAME_ENCODING_ERRORs) is that if an error is detectable without accessing connection state, we use the more specific error. So for example, since `initial_source_connection_id` and `original_destination_connection_id` are required transport parameters, their absence should be responded to with a TRANSPORT_PARAMETER_ERROR. A similar argument applies to the absence of the `retry_source_connection_id` TP, although I can see how one might use PROTOCOL_VIOLATION here (note that this is still valid behavior with this PR, as every more specific error can be replaced with a PROTOCOL_VIOLATION, if an implementation wishes to do so).
You can view, comment on, or merge this pull request online at:

  https://github.com/quicwg/base-drafts/pull/3691

-- Commit Summary --

  * use TRANSPORT_PARAMETER_ERROR when authenticating connection IDs

-- File Changes --

    M draft-ietf-quic-transport.md (8)

-- Patch Links --

https://github.com/quicwg/base-drafts/pull/3691.patch
https://github.com/quicwg/base-drafts/pull/3691.diff

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