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switch to a byte-based congestion controller

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Chrome removed the packet-based congestion controller and switched to
byte-based as well.
This commit is contained in:
Marten Seemann
2018-04-06 14:54:20 +07:00
parent 2127e2f1de
commit 2b97fb41c9
13 changed files with 442 additions and 459 deletions
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12
internal/protocol/server_parameters.go
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@@ -12,11 +12,13 @@ const MaxPacketSizeIPv6 = 1232
// This makes sure that those packets can always be retransmitted without splitting the contained StreamFrames
const NonForwardSecurePacketSizeReduction = 50
const defaultMaxCongestionWindowPackets = 1000
// DefaultMaxCongestionWindow is the default for the max congestion window
const DefaultMaxCongestionWindow = 1000
const DefaultMaxCongestionWindow ByteCount = defaultMaxCongestionWindowPackets * DefaultTCPMSS
// InitialCongestionWindow is the initial congestion window in QUIC packets
const InitialCongestionWindow = 32
const InitialCongestionWindow ByteCount = 32 * DefaultTCPMSS
// MaxUndecryptablePackets limits the number of undecryptable packets that a
// session queues for later until it sends a public reset.
@@ -70,7 +72,7 @@ const MaxStreamsMultiplier = 1.1
const MaxStreamsMinimumIncrement = 10
// MaxSessionUnprocessedPackets is the max number of packets stored in each session that are not yet processed.
const MaxSessionUnprocessedPackets = DefaultMaxCongestionWindow
const MaxSessionUnprocessedPackets = defaultMaxCongestionWindowPackets
// SkipPacketAveragePeriodLength is the average period length in which one packet number is skipped to prevent an Optimistic ACK attack
const SkipPacketAveragePeriodLength PacketNumber = 500
@@ -84,7 +86,7 @@ const CookieExpiryTime = 24 * time.Hour
// MaxOutstandingSentPackets is maximum number of packets saved for retransmission.
// When reached, it imposes a soft limit on sending new packets:
// Sending ACKs and retransmission is still allowed, but now new regular packets can be sent.
const MaxOutstandingSentPackets = 2 * DefaultMaxCongestionWindow
const MaxOutstandingSentPackets = 2 * defaultMaxCongestionWindowPackets
// MaxTrackedSentPackets is maximum number of sent packets saved for retransmission.
// When reached, no more packets will be sent.
@@ -92,7 +94,7 @@ const MaxOutstandingSentPackets = 2 * DefaultMaxCongestionWindow
const MaxTrackedSentPackets = MaxOutstandingSentPackets * 5 / 4
// MaxTrackedReceivedAckRanges is the maximum number of ACK ranges tracked
const MaxTrackedReceivedAckRanges = DefaultMaxCongestionWindow
const MaxTrackedReceivedAckRanges = defaultMaxCongestionWindowPackets
// MaxNonRetransmittableAcks is the maximum number of packets containing an ACK, but no retransmittable frames, that we send in a row
const MaxNonRetransmittableAcks = 19