Re: [quicwg/base-drafts] Don't arm the handshake timer if there's no data (#2590)

martinduke <notifications@github.com> Fri, 05 April 2019 15:13 UTC

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Date: Fri, 05 Apr 2019 15:13:43 +0000
From: martinduke <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Don't arm the handshake timer if there's no data (#2590)
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martinduke approved this pull request.

Alright, I'm down to two issues, one of which is entirely trivial.

> @@ -458,17 +460,15 @@ sent, then no alarm should be armed until data has been received from the
 client.
 
 Because the server could be blocked until more packets are received, the client
-MUST start the crypto retransmission timer even if there is no unacknowledged
-CRYPTO data.  If the timer expires and the client has no CRYPTO data to
-retransmit and does not have Handshake keys, it SHOULD send an Initial packet in
-a UDP datagram of at least 1200 bytes.  If the client has Handshake keys, it
-SHOULD send a Handshake packet.
-
-On each consecutive expiration of the crypto timer without receiving an
-acknowledgement for a new packet, the sender SHOULD double the crypto
-retransmission timeout and set a timer for this period.
+MUST ensure the crypto retransmission timer is set if there is unacknowledged
+crypto data and MUST ensure  the timer is set until it has 1RTT keys.

double space

> @@ -435,7 +435,9 @@ Data in CRYPTO frames is critical to QUIC transport and crypto negotiation, so a
 more aggressive timeout is used to retransmit it.
 
 The initial crypto retransmission timeout SHOULD be set to twice the initial
-RTT.
+RTT.  On each consecutive expiration of the crypto timer without receiving an
+acknowledgement for a new packet, the sender SHOULD double the crypto
+retransmission timeout and set a timer for this period.

Ah, OK. Line 448 probably should read "When an acknowledgment is received, a new RTT is computed. The endpoint MUST restart the timer and SHOULD set it for twice the newly computed smoothed RTT."

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