Re: [quicwg/base-drafts] Change Client Initial size to 1200 flat (#685)

Martin Thomson <notifications@github.com> Sat, 15 July 2017 17:40 UTC

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Date: Sat, 15 Jul 2017 17:40:25 +0000
From: Martin Thomson <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Change Client Initial size to 1200 flat (#685)
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martinthomson commented on this pull request.



>  
-The initial client packet SHOULD be padded to exactly these values unless the
-client has a reasonable assurance that the PMTU is larger.  Sending a packet of
-this size ensures that the network path supports an MTU of this size and helps
-reduce the amplitude of amplification attacks caused by server responses toward
-an unverified client address.
+The initial client packet SHOULD be padded to exactly 1200 octets unless the
+client has a reasonable assurance that the PMTU is larger.  This size includes
+the QUIC header and integrity check, but not the UDP or IP header. Sending a
+packet of this size ensures that the network path supports an MTU of this size
+and helps reduce the amplitude of amplification attacks caused by server
+responses toward an unverified client address.
 
 Servers MUST ignore an initial plaintext packet from a client if its total size

"QUIC packet size" or "packet size" should do.

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