Re: [quicwg/base-drafts] Rephrase size requirement for Initial packets (#2520)

Kazuho Oku <> Wed, 13 March 2019 16:20 UTC

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From: Kazuho Oku <>
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Subject: Re: [quicwg/base-drafts] Rephrase size requirement for Initial packets (#2520)
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kazuho commented on this pull request.

> @@ -1468,10 +1468,11 @@ magnitude of any amplification attack that can be mounted using spoofed source
 addresses.  In determining this limit, servers only count the size of
 successfully processed packets.
-Clients MUST pad UDP datagrams that contain only Initial packets to at least
-1200 bytes.  Once a client has received an acknowledgment for a Handshake packet
-it MAY send smaller datagrams.  Sending padded datagrams ensures that the server
-is not overly constrained by the amplification restriction.
+Clients MUST ensure that UDP datagrams containing Initial packets are sized to
+at least 1200 bytes, padding packets in the datagram if necessary.  Once a
+client has received an acknowledgment for a Handshake packet it MAY send smaller

To me this looks like an outdated text prior to draft-12.

Now that the server responds with an Initial packet, my understanding is that a client in required to send full-sized datagrams until it receives an _Initial_ packet from the server.

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