Remove dice package

app/observatory/burst/healthping.go

@@ -3,12 +3,12 @@ package burst
 import (
 	"context"
 	"fmt"
+	"math/rand/v2"
 	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
 
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/features/routing"
 )
@@ -181,7 +181,7 @@ func (h *HealthPing) doCheck(ctx context.Context, tags []string, duration time.D
 		for i := 0; i < rounds; i++ {
 			delay := time.Duration(0)
 			if duration > 0 {
-				delay = time.Duration(dice.RollInt63n(int64(duration)))
+				delay = rand.N(duration)
 			}
 			timers = append(timers, time.AfterFunc(delay, func() {
 				errors.LogDebug(h.ctx, "checking ", handler)

app/proxyman/outbound/handler.go

@@ -7,7 +7,7 @@ import (
 	"io"
 	"math/big"
 
-	"github.com/xtls/xray-core/common/dice"
+	mrand "math/rand/v2"
 
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
@@ -196,7 +196,7 @@ func (h *Handler) Dispatch(ctx context.Context, link *transport.Link) {
 			}
 		} else {
 			unchangedDomain := ob.Target.Address.Domain()
-			ob.Target.Address = net.IPAddress(ips[dice.Roll(len(ips))])
+			ob.Target.Address = net.IPAddress(ips[mrand.N(len(ips))])
 			errors.LogInfo(ctx, "target: ", unchangedDomain, " resolved to: ", ob.Target.Address.String())
 		}
 	}

app/reverse/config.go

@@ -3,12 +3,11 @@ package reverse
 import (
 	"crypto/rand"
 	"io"
-
-	"github.com/xtls/xray-core/common/dice"
+	mrand "math/rand/v2"
 )
 
 func (c *Control) FillInRandom() {
-	randomLength := dice.Roll(64)
+	randomLength := mrand.N(64)
 	randomLength++
 	c.Random = make([]byte, randomLength)
 	io.ReadFull(rand.Reader, c.Random)

app/router/strategy_leastload.go

@@ -3,13 +3,13 @@ package router
 import (
 	"context"
 	"math"
+	"math/rand/v2"
 	"slices"
 	"sort"
 	"time"
 
 	"github.com/xtls/xray-core/app/observatory"
 	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/extension"
@@ -74,7 +74,7 @@ func (s *LeastLoadStrategy) PickOutbound(candidates []string) string {
 		// goes to fallbackTag
 		return ""
 	}
-	return selects[dice.Roll(count)].Tag
+	return selects[rand.N(count)].Tag
 }
 
 func (s *LeastLoadStrategy) pickOutbounds(candidates []string) []*node {

app/router/strategy_random.go

@@ -2,10 +2,10 @@ package router
 
 import (
 	"context"
+	"math/rand/v2"
 
 	"github.com/xtls/xray-core/app/observatory"
 	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/extension"
 )
@@ -63,5 +63,5 @@ func (s *RandomStrategy) PickOutbound(candidates []string) string {
 		// goes to fallbackTag
 		return ""
 	}
-	return candidates[dice.Roll(count)]
+	return candidates[rand.N(count)]
 }

common/dice/dice.go

@@ -1,55 +0,0 @@
-// Package dice contains common functions to generate random number.
-// It also initialize math/rand with the time in seconds at launch time.
-package dice // import "github.com/xtls/xray-core/common/dice"
-
-import (
-	"math/rand"
-)
-
-// Roll returns a non-negative number between 0 (inclusive) and n (exclusive).
-func Roll(n int) int {
-	if n == 1 {
-		return 0
-	}
-	return rand.Intn(n)
-}
-
-// RollInt63n returns a non-negative number between 0 (inclusive) and n (exclusive).
-func RollInt63n(n int64) int64 {
-	if n == 1 {
-		return 0
-	}
-	return rand.Int63n(n)
-}
-
-// Roll returns a non-negative number between 0 (inclusive) and n (exclusive).
-func RollDeterministic(n int, seed int64) int {
-	if n == 1 {
-		return 0
-	}
-	return rand.New(rand.NewSource(seed)).Intn(n)
-}
-
-// RollUint16 returns a random uint16 value.
-func RollUint16() uint16 {
-	return uint16(rand.Int63() >> 47)
-}
-
-func RollUint64() uint64 {
-	return rand.Uint64()
-}
-
-func NewDeterministicDice(seed int64) *DeterministicDice {
-	return &DeterministicDice{rand.New(rand.NewSource(seed))}
-}
-
-type DeterministicDice struct {
-	*rand.Rand
-}
-
-func (dd *DeterministicDice) Roll(n int) int {
-	if n == 1 {
-		return 0
-	}
-	return dd.Intn(n)
-}

common/dice/dice_test.go

@@ -1,50 +0,0 @@
-package dice_test
-
-import (
-	"math/rand"
-	"testing"
-
-	. "github.com/xtls/xray-core/common/dice"
-)
-
-func BenchmarkRoll1(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		Roll(1)
-	}
-}
-
-func BenchmarkRoll20(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		Roll(20)
-	}
-}
-
-func BenchmarkIntn1(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		rand.Intn(1)
-	}
-}
-
-func BenchmarkIntn20(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		rand.Intn(20)
-	}
-}
-
-func BenchmarkInt63(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		_ = uint16(rand.Int63() >> 47)
-	}
-}
-
-func BenchmarkInt31(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		_ = uint16(rand.Int31() >> 15)
-	}
-}
-
-func BenchmarkIntn(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		_ = uint16(rand.Intn(65536))
-	}
-}

common/drain/drainer.go

@@ -2,8 +2,8 @@ package drain
 
 import (
 	"io"
+	"math/rand/v2"
 
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 )
 
@@ -12,10 +12,10 @@ type BehaviorSeedLimitedDrainer struct {
 }
 
 func NewBehaviorSeedLimitedDrainer(behaviorSeed int64, drainFoundation, maxBaseDrainSize, maxRandDrain int) (Drainer, error) {
-	behaviorRand := dice.NewDeterministicDice(behaviorSeed)
-	BaseDrainSize := behaviorRand.Roll(maxBaseDrainSize)
-	RandDrainMax := behaviorRand.Roll(maxRandDrain) + 1
-	RandDrainRolled := dice.Roll(RandDrainMax)
+	behaviorRand := rand.New(rand.NewPCG(uint64(behaviorSeed), 0))
+	BaseDrainSize := behaviorRand.N(maxBaseDrainSize)
+	RandDrainMax := behaviorRand.N(maxRandDrain) + 1
+	RandDrainRolled := rand.N(RandDrainMax)
 	DrainSize := drainFoundation + BaseDrainSize + RandDrainRolled
 	return &BehaviorSeedLimitedDrainer{DrainSize: DrainSize}, nil
 }

common/protocol/time.go

@@ -1,9 +1,8 @@
 package protocol
 
 import (
+	"math/rand/v2"
 	"time"
-
-	"github.com/xtls/xray-core/common/dice"
 )
 
 type Timestamp int64
@@ -16,7 +15,7 @@ func NowTime() Timestamp {
 
 func NewTimestampGenerator(base Timestamp, delta int) TimestampGenerator {
 	return func() Timestamp {
-		rangeInDelta := dice.Roll(delta*2) - delta
+		rangeInDelta := rand.N(delta*2) - delta
 		return base + Timestamp(rangeInDelta)
 	}
 }

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pion/stun/v3 v3.1.7
 	github.com/pires/go-proxyproto v0.16.0
-	github.com/refraction-networking/utls v1.8.3-0.20261014003643-b2e5ff8060be
+	github.com/refraction-networking/utls v1.8.3-0.20260301010127-aa6edf4b11af
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/stretchr/testify v1.12.1
 	github.com/vishvananda/netlink v1.3.1
@@ -41,14 +41,14 @@ require (
 )
 
 require (
+	github.com/andybalholm/brotli v1.2.3 // indirect
 	github.com/google/gopacket v1.1.19 // indirect
 	github.com/huin/goupnp v1.2.0 // indirect
 	github.com/jackpal/go-nat-pmp v1.0.2 // indirect
 	github.com/juju/ratelimit v1.0.2 // indirect
-	github.com/klauspost/compress v1.20.1 // indirect
+	github.com/klauspost/compress v1.20.0 // indirect
 	github.com/koron/go-ssdp v0.0.4 // indirect
 	github.com/libp2p/go-netroute v0.2.1 // indirect
-	github.com/molecule-man/go-brrr v1.2.0 // indirect
 	github.com/pion/dtls/v3 v3.1.5 // indirect
 	github.com/pion/logging v0.2.4 // indirect
 	github.com/pion/transport/v4 v4.1.0 // indirect

go.sum

@@ -1,3 +1,5 @@
+github.com/andybalholm/brotli v1.2.3 h1:8H1qwOkl2LPfjf3YezB90JnCliZb6SInJ/OJkEbA5NQ=
+github.com/andybalholm/brotli v1.2.3/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
 github.com/apernet/quic-go v0.61.1-0.20260806010916-184d081eef3e h1:5mgtR5gwIgBKMiGI1QdXldZZ+SNor06Nbu1wCBulQBg=
 github.com/apernet/quic-go v0.61.1-0.20260806010916-184d081eef3e/go.mod h1:x7qxEvX6MCVtDuBKHj3E+88+BtrbEMuAL5qGUKItjW8=
 github.com/bufbuild/protocompile v0.14.1 h1:iA73zAf/fyljNjQKwYzUHD6AD4R8KMasmwa/FBatYVw=
@@ -31,8 +33,8 @@ github.com/jackpal/go-nat-pmp v1.0.2 h1:KzKSgb7qkJvOUTqYl9/Hg/me3pWgBmERKrTGD7Bd
 github.com/jackpal/go-nat-pmp v1.0.2/go.mod h1:QPH045xvCAeXUZOxsnwmrtiCoxIr9eob+4orBN1SBKc=
 github.com/juju/ratelimit v1.0.2 h1:sRxmtRiajbvrcLQT7S+JbqU0ntsb9W2yhSdNN8tWfaI=
 github.com/juju/ratelimit v1.0.2/go.mod h1:qapgC/Gy+xNh9UxzV13HGGl/6UXNN+ct+vwSgWNm/qk=
-github.com/klauspost/compress v1.20.1 h1:T7kKElXUMXrUJ2E9QhQhxFtcK5rPyLdsGZvdbLMPdiQ=
-github.com/klauspost/compress v1.20.1/go.mod h1:LUdAzn7YLVvxLpc7y3V1m40wESHTgc1422pwwBSKYuI=
+github.com/klauspost/compress v1.20.0 h1:a3C1ke2ohxFymNlb2HWAHjDeKCI90scRskErZkR0ezA=
+github.com/klauspost/compress v1.20.0/go.mod h1:LUdAzn7YLVvxLpc7y3V1m40wESHTgc1422pwwBSKYuI=
 github.com/klauspost/cpuid/v2 v2.4.2 h1:xRw7IZEsAgVCp6trS/DgWbTAqpixhmywgVgBjYGg1bQ=
 github.com/klauspost/cpuid/v2 v2.4.2/go.mod h1:19jmZ9mjzoF//ddRSUsv0zfBTJWh3QJh9FNxZTMrGxU=
 github.com/koron/go-ssdp v0.0.4 h1:1IDwrghSKYM7yLf7XCzbByg2sJ/JcNOZRXS2jczTwz0=
@@ -47,8 +49,6 @@ github.com/libp2p/go-netroute v0.2.1 h1:V8kVrpD8GK0Riv15/7VN6RbUQ3URNZVosw7H2v9t
 github.com/libp2p/go-netroute v0.2.1/go.mod h1:hraioZr0fhBjG0ZRXJJ6Zj2IVEVNx6tDTFQfSmcq7mQ=
 github.com/miekg/dns v1.1.73 h1:uhT8nJxmTrPJYClxVxTCX+CVn6qnzSiybRk72Z6DgrE=
 github.com/miekg/dns v1.1.73/go.mod h1:RW2Obtfd5NZHvOFe3zYG0W8koWOQtAzyHaLo8vASBuQ=
-github.com/molecule-man/go-brrr v1.2.0 h1:dOJU45BC3Gc2WXoxAW0rgCAgVuu2gruAOGncfieA0Jw=
-github.com/molecule-man/go-brrr v1.2.0/go.mod h1:7ybW6/7gA3oKY45jOfVNjSJDtrr6ea4tzbsTkjmQDC4=
 github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
 github.com/pelletier/go-toml v1.9.5/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
 github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2 h1:JhzVVoYvbOACxoUmOs6V/G4D5nPVUW73rKvXxP4XUJc=
@@ -67,8 +67,8 @@ github.com/quic-go/go-ossfuzz-seeds v0.1.0 h1:APacT+iIaNF6fd8AGEiN3bT/Jtkd2jz4v4
 github.com/quic-go/go-ossfuzz-seeds v0.1.0/go.mod h1:3IOHRbJIc+L6YKMwfDtJAM9Vj9k0YY4muhuyUYk5tbk=
 github.com/quic-go/qpack v0.6.0 h1:g7W+BMYynC1LbYLSqRt8PBg5Tgwxn214ZZR34VIOjz8=
 github.com/quic-go/qpack v0.6.0/go.mod h1:lUpLKChi8njB4ty2bFLX2x4gzDqXwUpaO1DP9qMDZII=
-github.com/refraction-networking/utls v1.8.3-0.20261014003643-b2e5ff8060be h1:gpxlwEH6mzilrkEdDRoW5Gw6nuHFjie0xnf2cbtdW+E=
-github.com/refraction-networking/utls v1.8.3-0.20261014003643-b2e5ff8060be/go.mod h1:rc/ctWeKlh9LSk5k90KlSPcwF7P6D31mn/9GI2NAfBI=
+github.com/refraction-networking/utls v1.8.3-0.20260301010127-aa6edf4b11af h1:er2acxbi3N1nvEq6HXHUAR1nTWEJmQfqiGR8EVT9rfs=
+github.com/refraction-networking/utls v1.8.3-0.20260301010127-aa6edf4b11af/go.mod h1:jkSOEkLqn+S/jtpEHPOsVv/4V4EVnelwbMQl4vCWXAM=
 github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
 github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/rogpeppe/go-internal v1.16.0 h1:O9DK+vNMDVGLr2BeZqmpLeMjiMNkuXfcqntWbZV6S5g=
@@ -83,6 +83,8 @@ github.com/wlynxg/anet v0.0.5 h1:J3VJGi1gvo0JwZ/P1/Yc/8p63SoW98B5dHkYDmpgvvU=
 github.com/wlynxg/anet v0.0.5/go.mod h1:eay5PRQr7fIVAMbTbchTnO9gG65Hg/uYGdc7mguHxoA=
 github.com/xtls/reality v0.0.0-20261014101318-83f621788ca8 h1:RjLnVvlzK4q6zWaSBPNRGsrgx2fbJDeUWffjw574uzs=
 github.com/xtls/reality v0.0.0-20261014101318-83f621788ca8/go.mod h1:ptlSkJ8k/7IDauNH0SA96JPOo+nYGLTv2Y3UMpwvAsY=
+github.com/xyproto/randomstring v1.0.5 h1:YtlWPoRdgMu3NZtP45drfy1GKoojuR7hmRcnhZqKjWU=
+github.com/xyproto/randomstring v1.0.5/go.mod h1:rgmS5DeNXLivK7YprL0pY+lTuhNQW3iGxZ18UQApw/E=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/gopher-lua v0.0.0-20190206043414-8bfc7677f583/go.mod h1:gqRgreBUhTSL0GeU64rtZ3Uq3wtjOa/TB2YfrtkCbVQ=
 github.com/yuin/gopher-lua v1.1.2 h1:yF/FjE3hD65tBbt0VXLE13HWS9h34fdzJmrWRXwobGA=

proxy/blackhole/blackhole.go

@@ -4,12 +4,12 @@ package blackhole
 import (
 	"bytes"
 	"context"
+	"math/rand/v2"
 	"net/http"
 	"time"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/session"
@@ -74,7 +74,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		ctx, cancel := context.WithCancel(ctx)
 		timer := signal.CancelAfterInactivity(ctx, func() {
 			cancel()
-		}, time.Duration(30+dice.Roll(61))*time.Second)
+		}, time.Duration(30+rand.N(61))*time.Second)
 		go buf.Copy(link.Reader, buf.Discard, buf.UpdateActivity(timer))
 		<-ctx.Done()
 	}

proxy/freedom/freedom.go

@@ -12,7 +12,6 @@ import (
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/crypto"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/geodata"
 	"github.com/xtls/xray-core/common/log"
@@ -30,6 +29,7 @@ import (
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/stat"
+	mrand "math/rand/v2"
 )
 
 var (
@@ -228,7 +228,7 @@ func (r *FinalRule) blockDuration() time.Duration {
 	if max < min {
 		span = min - max
 	}
-	return time.Duration(min+uint64(dice.Roll(int(span+1)))) * time.Second
+	return time.Duration(min+mrand.N(span+1)) * time.Second
 }
 
 func (r *FinalRule) log(ctx context.Context, msg ...interface{}) {
@@ -634,7 +634,7 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 								continue
 							}
 						} else {
-							ip = net.IPAddress(ips[dice.Roll(len(ips))])
+							ip = net.IPAddress(ips[mrand.N(len(ips))])
 							shouldUseSystemResolver = false
 						}
 					}

proxy/shadowsocks/validator.go

@@ -5,10 +5,10 @@ import (
 	"crypto/hmac"
 	"crypto/sha256"
 	"hash/crc64"
+	"math/rand/v2"
 	"strings"
 	"sync"
 
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/protocol"
 )
@@ -158,7 +158,7 @@ func (v *Validator) GetBehaviorSeed() uint64 {
 
 	v.behaviorFused = true
 	if v.behaviorSeed == 0 {
-		v.behaviorSeed = dice.RollUint64()
+		v.behaviorSeed = rand.Uint64()
 	}
 	return v.behaviorSeed
 }

proxy/vmess/encoding/client.go

@@ -13,13 +13,13 @@ import (
 	"github.com/xtls/xray-core/common/bitmask"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/crypto"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/drain"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/proxy/vmess"
 	vmessaead "github.com/xtls/xray-core/proxy/vmess/aead"
 	"golang.org/x/crypto/chacha20poly1305"
+	mrand "math/rand/v2"
 )
 
 // ClientSession stores connection session info for VMess client.
@@ -72,7 +72,7 @@ func (c *ClientSession) EncodeRequestHeader(header *protocol.RequestHeader, writ
 	common.Must(buffer.WriteByte(c.responseHeader))
 	common.Must(buffer.WriteByte(byte(header.Option)))
 
-	paddingLen := dice.Roll(16)
+	paddingLen := mrand.N(16)
 	security := byte(paddingLen<<4) | byte(header.Security)
 	common.Must2(buffer.Write([]byte{security, byte(0), byte(header.Command)}))
 

proxy/vmess/validator.go

@@ -4,10 +4,10 @@ import (
 	"crypto/hmac"
 	"crypto/sha256"
 	"hash/crc64"
+	"math/rand/v2"
 	"strings"
 	"sync"
 
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/proxy/vmess/aead"
@@ -117,7 +117,7 @@ func (v *TimedUserValidator) GetBehaviorSeed() uint64 {
 
 	v.behaviorFused = true
 	if v.behaviorSeed == 0 {
-		v.behaviorSeed = dice.RollUint64()
+		v.behaviorSeed = rand.Uint64()
 	}
 	return v.behaviorSeed
 }

proxy/wireguard/client.go

@@ -3,6 +3,7 @@ package wireguard
 import (
 	"context"
 	"fmt"
+	"math/rand/v2"
 	"net/netip"
 	"reflect"
 	"strings"
@@ -14,7 +15,6 @@ import (
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
@@ -364,7 +364,7 @@ func MakeResolveLocal(d dns.Client, streamSettings *internet.MemoryStreamConfig)
 				return nil, dns.ErrEmptyResponse
 			}
 		}
-		return got[dice.Roll(len(got))], nil
+		return got[rand.N(len(got))], nil
 	}
 }
 

transport/internet/dialer.go

@@ -3,10 +3,10 @@ package internet
 import (
 	"context"
 	"fmt"
+	"math/rand/v2"
 	"strings"
 
 	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/net/cnc"
@@ -260,7 +260,7 @@ func DialSystem(ctx context.Context, dest net.Destination, sockopt *SocketConfig
 				return nil, err
 			}
 		} else if sockopt.HappyEyeballs == nil || sockopt.HappyEyeballs.TryDelayMs == 0 || sockopt.HappyEyeballs.MaxConcurrentTry == 0 || len(ips) < 2 || len(sockopt.DialerProxy) > 0 || dest.Network != net.Network_TCP {
-			dest.Address = net.IPAddress(ips[dice.Roll(len(ips))])
+			dest.Address = net.IPAddress(ips[rand.N(len(ips))])
 			errors.LogInfo(ctx, "replace destination with "+dest.String())
 		} else {
 			return TcpRaceDial(ctx, src, ips, dest.Port, sockopt, dest.Address.String())

transport/internet/finalmask/mkcp/header/header_dns.go

@@ -3,8 +3,7 @@ package header
 import (
 	"encoding/binary"
 	"errors"
-
-	"github.com/xtls/xray-core/common/dice"
+	"math/rand/v2"
 )
 
 type dns struct {
@@ -17,7 +16,7 @@ func (h *dns) Size() int {
 
 func (h *dns) Serialize(b []byte) {
 	copy(b, h.header)
-	binary.BigEndian.PutUint16(b[0:], dice.RollUint16())
+	binary.BigEndian.PutUint16(b[0:], uint16(rand.Uint32()))
 }
 
 func NewHeaderDNS(domain string) (*dns, error) {

transport/internet/headers/http/config.go

@@ -1,9 +1,8 @@
 package http
 
 import (
+	"math/rand/v2"
 	"strings"
-
-	"github.com/xtls/xray-core/common/dice"
 )
 
 func pickString(arr []string) string {
@@ -14,7 +13,7 @@ func pickString(arr []string) string {
 	case 1:
 		return arr[0]
 	default:
-		return arr[dice.Roll(n)]
+		return arr[rand.N(n)]
 	}
 }
 

transport/internet/kcp/dialer.go

@@ -3,11 +3,11 @@ package kcp
 import (
 	"context"
 	"io"
+	"math/rand/v2"
 	"sync/atomic"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/transport/internet"
@@ -15,7 +15,7 @@ import (
 	"github.com/xtls/xray-core/transport/internet/tls"
 )
 
-var globalConv = uint32(dice.RollUint16())
+var globalConv = uint32(uint16(rand.Uint32()))
 
 func fetchInput(_ context.Context, input io.Reader, reader PacketReader, conn *Connection) {
 	cache := make(chan *buf.Buffer, 1024)

transport/internet/xdrive/drive.go

@@ -7,13 +7,13 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"math/rand/v2"
 	"net/http"
 	"net/url"
 	"strings"
 	"sync"
 	"time"
 
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/transport/internet"
 )
@@ -182,7 +182,7 @@ func jitter(backoff time.Duration) time.Duration {
 	if half <= 0 {
 		return backoff
 	}
-	return half + time.Duration(dice.RollInt63n(int64(half)))
+	return half + rand.N(half)
 }
 
 func rateLimited(payload []byte) bool {