mirrors/uquic
1
0
Fork 0
mirror of https://github.com/refraction-networking/uquic.git synced 2025-04-03 20:27:35 +03:00
Code Issues Projects Releases Packages Wiki Activity

Merge pull request #3129 from lucas-clemente/limit-retry-rtt-measurement

Browse source 
don't use a lower RTT than 5ms after receiving a Retry packet
This commit is contained in:
Marten Seemann 2021-04-02 19:30:06 +07:00 • committed by GitHub
commit 3138a45fde
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 19 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
internal/ackhandler/sent_packet_handler.go
View file

@ -21,6 +21,8 @@ const (
packetThreshold = 3
// Before validating the client's address, the server won't send more than 3x bytes than it received.
amplificationFactor = 3
// We use Retry packets to derive an RTT estimate. Make sure we don't set the RTT to a super low value yet.
minRTTAfterRetry = 5 * time.Millisecond
)
type packetNumberSpace struct {
@ -792,8 +794,9 @@ func (h *sentPacketHandler) ResetForRetry() error {
// Only use the Retry to estimate the RTT if we didn't send any retransmission for the Initial.
// Otherwise, we don't know which Initial the Retry was sent in response to.
if h.ptoCount == 0 {
// Don't set the RTT to a value lower than 5ms here.
now := time.Now()
h.rttStats.UpdateRTT(now.Sub(firstPacketSendTime), 0, now)
h.rttStats.UpdateRTT(utils.MaxDuration(minRTTAfterRetry, now.Sub(firstPacketSendTime)), 0, now)
if h.logger.Debug() {
h.logger.Debugf("\tupdated RTT: %s (σ: %s)", h.rttStats.SmoothedRTT(), h.rttStats.MeanDeviation())
}