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initialize the MTU discoverer immediately

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This commit is contained in:
Marten Seemann 2023-04-17 23:42:58 +02:00
parent 727f9e5654
commit ecaef04695
4 changed files with 67 additions and 20 deletions
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26
mtu_discoverer.go
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@ -10,7 +10,11 @@ import (
)
type mtuDiscoverer interface {
// Start starts the MTU discovery process.
// It's unnecessary to call ShouldSendProbe before that.
Start(maxPacketSize protocol.ByteCount)
ShouldSendProbe(now time.Time) bool
CurrentSize() protocol.ByteCount
GetPing() (ping ackhandler.Frame, datagramSize protocol.ByteCount)
}
@ -34,13 +38,11 @@ type mtuFinder struct {
var _ mtuDiscoverer = &mtuFinder{}
func newMTUDiscoverer(rttStats *utils.RTTStats, start, max protocol.ByteCount, mtuIncreased func(protocol.ByteCount)) mtuDiscoverer {
func newMTUDiscoverer(rttStats *utils.RTTStats, start protocol.ByteCount, mtuIncreased func(protocol.ByteCount)) *mtuFinder {
return &mtuFinder{
current: start,
rttStats: rttStats,
lastProbeTime: time.Now(), // to make sure the first probe packet is not sent immediately
mtuIncreased: mtuIncreased,
max: max,
current: start,
rttStats: rttStats,
mtuIncreased: mtuIncreased,
}
}
@ -48,7 +50,15 @@ func (f *mtuFinder) done() bool {
return f.max-f.current <= maxMTUDiff+1
}
func (f *mtuFinder) Start(maxPacketSize protocol.ByteCount) {
f.lastProbeTime = time.Now() // makes sure the first probe packet is not sent immediately
f.max = maxPacketSize
}
func (f *mtuFinder) ShouldSendProbe(now time.Time) bool {
if f.max == 0 || f.lastProbeTime.IsZero() {
return false
}
if f.probeInFlight || f.done() {
return false
}
@ -72,3 +82,7 @@ func (f *mtuFinder) GetPing() (ackhandler.Frame, protocol.ByteCount) {
},
}, size
}
func (f *mtuFinder) CurrentSize() protocol.ByteCount {
return f.current
}