stateless reset in response to packet that is 43 bytes

Jiuhai Zhang <jiuhai.zhang@gmail.com> Sun, 31 May 2020 16:55 UTC

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From: Jiuhai Zhang <jiuhai.zhang@gmail.com>
Date: Mon, 1 Jun 2020 00:55:37 +0800
Message-ID: <CAG9+TpZujQdj2OwJjnVOGQS942--wTuRN7n+MsHTjxYUhNtLdQ@mail.gmail.com>
Subject: stateless reset in response to packet that is 43 bytes
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https://tools.ietf.org/html/draft-ietf-quic-transport-27#section-10.4

An endpoint that sends a stateless reset in response to
   packet that is 43 bytes or less in length SHOULD send a stateless
   reset that is one byte shorter than the packet it responds to.


Could someone explain why it is 43 bytes? thks