What happens when a VERSIONS cell is sent outside a handshake?
The spec really doesn't say:
To determine the version, in any connection where the "renegotiation" or "in-protocol" handshake was used (that is, where the responder sent only one certificate at first and where the initiator did not send any certificates in the first negotiation), both parties MUST send a VERSIONS cell. In "renegotiation", they send a VERSIONS cell right after the renegotiation is finished, before any other cells are sent. In "in-protocol", the initiator sends a VERSIONS cell immediately after the initial TLS handshake, and the responder replies immediately with a VERSIONS cell. Parties MUST NOT send any other cells on a connection until they have received a VERSIONS cell. The payload in a VERSIONS cell is a series of big-endian two-byte integers. Both parties MUST select as the link protocol version the highest number contained both in the VERSIONS cell they sent and in the versions cell they received. If they have no such version in common, they cannot communicate and MUST close the connection. Either party MUST close the connection if the versions cell is not well-formed (for example, if it contains an odd number of bytes).
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