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add a callback to block window increases to the connection flow controller

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This commit is contained in:
Marten Seemann 2022-01-14 11:27:43 +04:00
parent a98e60c28c
commit f9904c7c45
5 changed files with 75 additions and 8 deletions
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7
internal/flowcontrol/base_flow_controller.go
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@ -23,6 +23,8 @@ type baseFlowController struct {
receiveWindowSize protocol.ByteCount
maxReceiveWindowSize protocol.ByteCount
allowWindowIncrease func(size protocol.ByteCount) bool
epochStartTime time.Time
epochStartOffset protocol.ByteCount
rttStats *utils.RTTStats
@ -105,7 +107,10 @@ func (c *baseFlowController) maybeAdjustWindowSize() {
now := time.Now()
if now.Sub(c.epochStartTime) < time.Duration(4*fraction*float64(rtt)) {
// window is consumed too fast, try to increase the window size
c.receiveWindowSize = utils.MinByteCount(2*c.receiveWindowSize, c.maxReceiveWindowSize)
newSize := utils.MinByteCount(2*c.receiveWindowSize, c.maxReceiveWindowSize)
if newSize > c.receiveWindowSize && (c.allowWindowIncrease == nil || c.allowWindowIncrease(newSize-c.receiveWindowSize)) {
c.receiveWindowSize = newSize
}
}
c.startNewAutoTuningEpoch(now)
}