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move calculation of the PTO to the rttStats

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The PTO value is needed at various places in the protocol. Calculating
it on the rttStats struct will allow us to pass around this struct.
This commit is contained in:
Marten Seemann
2019-06-29 14:49:33 +07:00
parent 4366eac105
commit 66abcdfc5c
4 changed files with 23 additions and 19 deletions
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5
internal/congestion/rtt_stats.go
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@@ -3,6 +3,7 @@ package congestion
import (
"time"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/utils"
)
@@ -56,6 +57,10 @@ func (r *RTTStats) MeanDeviation() time.Duration { return r.meanDeviation }
func (r *RTTStats) MaxAckDelay() time.Duration { return r.maxAckDelay }
func (r *RTTStats) PTO() time.Duration {
return r.SmoothedOrInitialRTT() + utils.MaxDuration(4*r.MeanDeviation(), protocol.TimerGranularity) + r.MaxAckDelay()
}
// UpdateRTT updates the RTT based on a new sample.
func (r *RTTStats) UpdateRTT(sendDelta, ackDelay time.Duration, now time.Time) {
if sendDelta == utils.InfDuration || sendDelta <= 0 {