chore: remove unused code

transport/tuic/common/congestion.go

@@ -21,7 +21,6 @@ func SetCongestionController(quicConn *quic.Conn, cc string, cwnd int) {
 	case "cubic":
 		quicConn.SetCongestionControl(
 			congestion.NewCubicSender(
-				congestion.DefaultClock{},
 				congestion.GetInitialPacketSize(quicConn),
 				false,
 			),
@@ -29,7 +28,6 @@ func SetCongestionController(quicConn *quic.Conn, cc string, cwnd int) {
 	case "new_reno":
 		quicConn.SetCongestionControl(
 			congestion.NewCubicSender(
-				congestion.DefaultClock{},
 				congestion.GetInitialPacketSize(quicConn),
 				true,
 			),
@@ -37,7 +35,6 @@ func SetCongestionController(quicConn *quic.Conn, cc string, cwnd int) {
 	case "bbr_meta_v1":
 		quicConn.SetCongestionControl(
 			congestion.NewBBRSender(
-				congestion.DefaultClock{},
 				congestion.GetInitialPacketSize(quicConn),
 				c.ByteCount(cwnd)*congestion.InitialMaxDatagramSize,
 				congestion.DefaultBBRMaxCongestionWindow*congestion.InitialMaxDatagramSize,
@@ -48,7 +45,6 @@ func SetCongestionController(quicConn *quic.Conn, cc string, cwnd int) {
 	case "bbr":
 		quicConn.SetCongestionControl(
 			congestionv2.NewBbrSender(
-				congestionv2.DefaultClock{},
 				congestionv2.GetInitialPacketSize(quicConn),
 				c.ByteCount(cwnd),
 			),

transport/tuic/congestion/bbr_sender.go

@@ -101,7 +101,6 @@ const (
 
 type bbrSender struct {
 	mode          bbrMode
-	clock         Clock
 	rttStats      congestion.RTTStatsProvider
 	bytesInFlight congestion.ByteCount
 	// return total bytes of unacked packets.
@@ -232,14 +231,12 @@ type bbrSender struct {
 }
 
 func NewBBRSender(
-	clock Clock,
 	initialMaxDatagramSize,
 	initialCongestionWindow,
 	initialMaxCongestionWindow congestion.ByteCount,
 ) *bbrSender {
 	b := &bbrSender{
 		mode:                      STARTUP,
-		clock:                     clock,
 		sampler:                   NewBandwidthSampler(),
 		maxBandwidth:              NewWindowedFilter(int64(BandwidthWindowSize), MaxFilter),
 		maxAckHeight:              NewWindowedFilter(int64(BandwidthWindowSize), MaxFilter),

transport/tuic/congestion/clock.go

@@ -1,18 +0,0 @@
-package congestion
-
-import "time"
-
-// A Clock returns the current time
-type Clock interface {
-	Now() time.Time
-}
-
-// DefaultClock implements the Clock interface using the Go stdlib clock.
-type DefaultClock struct{}
-
-var _ Clock = DefaultClock{}
-
-// Now gets the current time
-func (DefaultClock) Now() time.Time {
-	return time.Now()
-}

transport/tuic/congestion/cubic.go

@@ -37,8 +37,6 @@ const betaLastMax float32 = 0.85
 
 // Cubic implements the cubic algorithm from TCP
 type Cubic struct {
-	clock Clock
-
 	// Number of connections to simulate.
 	numConnections int
 
@@ -67,9 +65,8 @@ type Cubic struct {
 }
 
 // NewCubic returns a new Cubic instance
-func NewCubic(clock Clock) *Cubic {
+func NewCubic() *Cubic {
 	c := &Cubic{
-		clock:          clock,
 		numConnections: defaultNumConnections,
 	}
 	c.Reset()

transport/tuic/congestion/cubic_sender.go

@@ -23,7 +23,6 @@ type cubicSender struct {
 	rttStats        congestion.RTTStatsProvider
 	cubic           *Cubic
 	pacer           *pacer
-	clock           Clock
 
 	reno bool
 
@@ -61,12 +60,10 @@ var (
 
 // NewCubicSender makes a new cubic sender
 func NewCubicSender(
-	clock Clock,
 	initialMaxDatagramSize congestion.ByteCount,
 	reno bool,
 ) *cubicSender {
 	return newCubicSender(
-		clock,
 		reno,
 		initialMaxDatagramSize,
 		initialCongestionWindow*initialMaxDatagramSize,
@@ -75,7 +72,6 @@ func NewCubicSender(
 }
 
 func newCubicSender(
-	clock Clock,
 	reno bool,
 	initialMaxDatagramSize,
 	initialCongestionWindow,
@@ -89,8 +85,6 @@ func newCubicSender(
 		initialMaxCongestionWindow: initialMaxCongestionWindow,
 		congestionWindow:           initialCongestionWindow,
 		slowStartThreshold:         MaxByteCount,
-		cubic:                      NewCubic(clock),
-		clock:                      clock,
 		reno:                       reno,
 		maxDatagramSize:            initialMaxDatagramSize,
 	}

transport/tuic/congestion_v2/bbr_sender.go

@@ -96,7 +96,6 @@ const (
 
 type bbrSender struct {
 	rttStats congestion.RTTStatsProvider
-	clock    Clock
 	pacer    *Pacer
 
 	mode bbrMode
@@ -244,12 +243,10 @@ type bbrSender struct {
 var _ congestion.CongestionControl = &bbrSender{}
 
 func NewBbrSender(
-	clock Clock,
 	initialMaxDatagramSize congestion.ByteCount,
 	initialCongestionWindowPackets congestion.ByteCount,
 ) *bbrSender {
 	return newBbrSender(
-		clock,
 		initialMaxDatagramSize,
 		initialCongestionWindowPackets*initialMaxDatagramSize,
 		congestion.MaxCongestionWindowPackets*initialMaxDatagramSize,
@@ -257,13 +254,11 @@ func NewBbrSender(
 }
 
 func newBbrSender(
-	clock Clock,
 	initialMaxDatagramSize,
 	initialCongestionWindow,
 	initialMaxCongestionWindow congestion.ByteCount,
 ) *bbrSender {
 	b := &bbrSender{
-		clock:                        clock,
 		mode:                         bbrModeStartup,
 		sampler:                      newBandwidthSampler(roundTripCount(bandwidthWindowSize)),
 		lastSentPacket:               invalidPacketNumber,
@@ -297,7 +292,7 @@ func newBbrSender(
 		}
 	*/
 
-	b.enterStartupMode(b.clock.Now())
+	b.enterStartupMode()
 	b.setHighCwndGain(derivedHighCWNDGain)
 
 	return b
@@ -605,7 +600,7 @@ func (b *bbrSender) maybeUpdateMinRtt(now monotime.Time, sampleMinRtt time.Durat
 }
 
 // Enters the STARTUP mode.
-func (b *bbrSender) enterStartupMode(now monotime.Time) {
+func (b *bbrSender) enterStartupMode() {
 	b.mode = bbrModeStartup
 	// b.maybeTraceStateChange(logging.CongestionStateStartup)
 	b.pacingGain = b.highGain
@@ -757,7 +752,7 @@ func (b *bbrSender) maybeEnterOrExitProbeRtt(now monotime.Time, isRoundStart, mi
 			if now.Sub(b.exitProbeRttAt) >= 0 && b.probeRttRoundPassed {
 				b.minRttTimestamp = now
 				if !b.isAtFullBandwidth {
-					b.enterStartupMode(now)
+					b.enterStartupMode()
 				} else {
 					b.enterProbeBandwidthMode(now)
 				}

transport/tuic/congestion_v2/clock.go

@@ -1,20 +0,0 @@
-package congestion
-
-import (
-	"github.com/metacubex/quic-go/monotime"
-)
-
-// A Clock returns the current time
-type Clock interface {
-	Now() monotime.Time
-}
-
-// DefaultClock implements the Clock interface using the Go stdlib clock.
-type DefaultClock struct{}
-
-var _ Clock = DefaultClock{}
-
-// Now gets the current time
-func (DefaultClock) Now() monotime.Time {
-	return monotime.Now()
-}