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remove old code to send an ACK every 20 packets

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This was needed before QUIC 39, and should have been removed when we
dropped support for QUIC 38.
This commit is contained in:
Marten Seemann
2017-12-01 12:08:12 +07:00
parent ccd91a36b7
commit 184f81d8c4
3 changed files with 2 additions and 27 deletions
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9
ackhandler/received_packet_handler.go
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@@ -77,15 +77,6 @@ func (h *receivedPacketHandler) maybeQueueAck(packetNumber protocol.PacketNumber
h.ackQueued = true
}
if h.version < protocol.Version39 {
// Always send an ack every 20 packets in order to allow the peer to discard
// information from the SentPacketManager and provide an RTT measurement.
// From QUIC 39, this is not needed anymore, since the peer will regularly send a retransmittable packet.
if h.packetsReceivedSinceLastAck >= protocol.MaxPacketsReceivedBeforeAckSend {
h.ackQueued = true
}
}
// if the packet number is smaller than the largest acked packet, it must have been reported missing with the last ACK
// note that it cannot be a duplicate because they're already filtered out by ReceivedPacket()
if h.lastAck != nil && packetNumber < h.lastAck.LargestAcked {