common: fix task leak in timer (#4831)

signal包里面SetTimeout方法并发时可能会出现task close以后执行start导致泄露

.github/docker/Dockerfile

@@ -45,6 +45,7 @@ RUN mkdir -p /tmp/var/log/xray && touch \
 FROM gcr.io/distroless/static:nonroot
 
 COPY --from=build --chown=0:0 --chmod=755 /src/xray /usr/local/bin/xray
+COPY --from=build --chown=0:0 --chmod=755 /tmp/empty /usr/local/share/xray
 COPY --from=build --chown=0:0 --chmod=644 /tmp/geodat/*.dat /usr/local/share/xray/
 COPY --from=build --chown=0:0 --chmod=755 /tmp/empty /usr/local/etc/xray
 COPY --from=build --chown=0:0 --chmod=644 /tmp/usr/local/etc/xray/*.json /usr/local/etc/xray/

.github/docker/Dockerfile.usa

@@ -54,6 +54,7 @@ RUN mkdir -p /tmp/var/log/xray && touch \
 FROM --platform=linux/amd64 gcr.io/distroless/static:nonroot
 
 COPY --from=build --chown=0:0 --chmod=755 /src/xray /usr/local/bin/xray
+COPY --from=build --chown=0:0 --chmod=755 /tmp/empty /usr/local/share/xray
 COPY --from=build --chown=0:0 --chmod=644 /tmp/geodat/*.dat /usr/local/share/xray/
 COPY --from=build --chown=0:0 --chmod=755 /tmp/empty /usr/local/etc/xray
 COPY --from=build --chown=0:0 --chmod=644 /tmp/usr/local/etc/xray/*.json /usr/local/etc/xray/

README.md

@@ -98,6 +98,7 @@
 - Linux
   - [v2rayA](https://github.com/v2rayA/v2rayA)
   - [Furious](https://github.com/LorenEteval/Furious)
+  - [GorzRay](https://github.com/ketetefid/GorzRay)
 
 ## Others that support VLESS, XTLS, REALITY, XUDP, PLUX...
 
@@ -109,6 +110,7 @@
   - [xray-checker](https://github.com/kutovoys/xray-checker)
 - Xray Wrapper
   - [XTLS/libXray](https://github.com/XTLS/libXray)
+  - [xtls-sdk](https://github.com/remnawave/xtls-sdk)
   - [xtlsapi](https://github.com/hiddify/xtlsapi)
   - [AndroidLibXrayLite](https://github.com/2dust/AndroidLibXrayLite)
   - [Xray-core-python](https://github.com/LorenEteval/Xray-core-python)
@@ -125,6 +127,8 @@
 
 [Code of Conduct](https://github.com/XTLS/Xray-core/blob/main/CODE_OF_CONDUCT.md)
 
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/XTLS/Xray-core)
+
 ## Credits
 
 - [Xray-core v1.0.0](https://github.com/XTLS/Xray-core/releases/tag/v1.0.0) was forked from [v2fly-core 9a03cc5](https://github.com/v2fly/v2ray-core/commit/9a03cc5c98d04cc28320fcee26dbc236b3291256), and we have made & accumulated a huge number of enhancements over time, check [the release notes for each version](https://github.com/XTLS/Xray-core/releases).

app/observatory/burst/config.pb.go

@@ -90,6 +90,8 @@ type HealthPingConfig struct {
 	SamplingCount int32 `protobuf:"varint,4,opt,name=samplingCount,proto3" json:"samplingCount,omitempty"`
 	// ping timeout, int64 values of time.Duration
 	Timeout int64 `protobuf:"varint,5,opt,name=timeout,proto3" json:"timeout,omitempty"`
+	// http method to make request
+	HttpMethod string `protobuf:"bytes,6,opt,name=httpMethod,proto3" json:"httpMethod,omitempty"`
 }
 
 func (x *HealthPingConfig) Reset() {
@@ -157,6 +159,13 @@ func (x *HealthPingConfig) GetTimeout() int64 {
 	return 0
 }
 
+func (x *HealthPingConfig) GetHttpMethod() string {
+	if x != nil {
+		return x.HttpMethod
+	}
+	return ""
+}
+
 var File_app_observatory_burst_config_proto protoreflect.FileDescriptor
 
 var file_app_observatory_burst_config_proto_rawDesc = []byte{
@@ -173,7 +182,7 @@ var file_app_observatory_burst_config_proto_rawDesc = []byte{
 	0x2e, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x2e, 0x62, 0x75, 0x72,
 	0x73, 0x74, 0x2e, 0x48, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x50, 0x69, 0x6e, 0x67, 0x43, 0x6f, 0x6e,
 	0x66, 0x69, 0x67, 0x52, 0x0a, 0x70, 0x69, 0x6e, 0x67, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x22,
-	0xb4, 0x01, 0x0a, 0x10, 0x48, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x50, 0x69, 0x6e, 0x67, 0x43, 0x6f,
+	0xd4, 0x01, 0x0a, 0x10, 0x48, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x50, 0x69, 0x6e, 0x67, 0x43, 0x6f,
 	0x6e, 0x66, 0x69, 0x67, 0x12, 0x20, 0x0a, 0x0b, 0x64, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x61, 0x74,
 	0x69, 0x6f, 0x6e, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x64, 0x65, 0x73, 0x74, 0x69,
 	0x6e, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x22, 0x0a, 0x0c, 0x63, 0x6f, 0x6e, 0x6e, 0x65, 0x63,
@@ -184,7 +193,9 @@ var file_app_observatory_burst_config_proto_rawDesc = []byte{
 	0x6e, 0x67, 0x43, 0x6f, 0x75, 0x6e, 0x74, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x52, 0x0d, 0x73,
 	0x61, 0x6d, 0x70, 0x6c, 0x69, 0x6e, 0x67, 0x43, 0x6f, 0x75, 0x6e, 0x74, 0x12, 0x18, 0x0a, 0x07,
 	0x74, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x18, 0x05, 0x20, 0x01, 0x28, 0x03, 0x52, 0x07, 0x74,
-	0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x42, 0x70, 0x0a, 0x1e, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72,
+	0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x12, 0x1e, 0x0a, 0x0a, 0x68, 0x74, 0x74, 0x70, 0x4d, 0x65,
+	0x74, 0x68, 0x6f, 0x64, 0x18, 0x06, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0a, 0x68, 0x74, 0x74, 0x70,
+	0x4d, 0x65, 0x74, 0x68, 0x6f, 0x64, 0x42, 0x70, 0x0a, 0x1e, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72,
 	0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f,
 	0x72, 0x79, 0x2e, 0x62, 0x75, 0x72, 0x73, 0x74, 0x50, 0x01, 0x5a, 0x2f, 0x67, 0x69, 0x74, 0x68,
 	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79,

app/observatory/burst/config.proto

@@ -26,4 +26,7 @@ message HealthPingConfig {
   int32 samplingCount = 4;
   // ping timeout, int64 values of time.Duration
   int64 timeout = 5;
+  // http method to make request
+  string httpMethod = 6;
+
 }

app/observatory/burst/healthping.go

@@ -19,6 +19,7 @@ type HealthPingSettings struct {
 	Interval      time.Duration `json:"interval"`
 	SamplingCount int           `json:"sampling"`
 	Timeout       time.Duration `json:"timeout"`
+	HttpMethod    string        `json:"httpMethod"`
 }
 
 // HealthPing is the health checker for balancers
@@ -37,12 +38,21 @@ type HealthPing struct {
 func NewHealthPing(ctx context.Context, dispatcher routing.Dispatcher, config *HealthPingConfig) *HealthPing {
 	settings := &HealthPingSettings{}
 	if config != nil {
+
+		var httpMethod string
+		if config.HttpMethod == "" {
+			httpMethod = "HEAD"
+		} else {
+			httpMethod = strings.TrimSpace(config.HttpMethod)
+		}
+
 		settings = &HealthPingSettings{
 			Connectivity:  strings.TrimSpace(config.Connectivity),
 			Destination:   strings.TrimSpace(config.Destination),
 			Interval:      time.Duration(config.Interval),
 			SamplingCount: int(config.SamplingCount),
 			Timeout:       time.Duration(config.Timeout),
+			HttpMethod:    httpMethod,
 		}
 	}
 	if settings.Destination == "" {
@@ -164,7 +174,7 @@ func (h *HealthPing) doCheck(tags []string, duration time.Duration, rounds int)
 			}
 			time.AfterFunc(delay, func() {
 				errors.LogDebug(h.ctx, "checking ", handler)
-				delay, err := client.MeasureDelay()
+				delay, err := client.MeasureDelay(h.Settings.HttpMethod)
 				if err == nil {
 					ch <- &rtt{
 						handler: handler,
@@ -251,7 +261,7 @@ func (h *HealthPing) checkConnectivity() bool {
 		h.Settings.Connectivity,
 		h.Settings.Timeout,
 	)
-	if _, err := tester.MeasureDelay(); err != nil {
+	if _, err := tester.MeasureDelay(h.Settings.HttpMethod); err != nil {
 		return false
 	}
 	return true

app/observatory/burst/ping.go

@@ -2,6 +2,7 @@ package burst
 
 import (
 	"context"
+	"io"
 	"net/http"
 	"time"
 
@@ -51,20 +52,28 @@ func newHTTPClient(ctxv context.Context, dispatcher routing.Dispatcher, handler
 }
 
 // MeasureDelay returns the delay time of the request to dest
-func (s *pingClient) MeasureDelay() (time.Duration, error) {
+func (s *pingClient) MeasureDelay(httpMethod string) (time.Duration, error) {
 	if s.httpClient == nil {
 		panic("pingClient not initialized")
 	}
-	req, err := http.NewRequest(http.MethodHead, s.destination, nil)
+
+	req, err := http.NewRequest(httpMethod, s.destination, nil)
 	if err != nil {
 		return rttFailed, err
 	}
+
 	start := time.Now()
 	resp, err := s.httpClient.Do(req)
 	if err != nil {
 		return rttFailed, err
 	}
-	// don't wait for body
+	if httpMethod == http.MethodGet {
+		_, err = io.Copy(io.Discard, resp.Body)
+		if err != nil {
+			return rttFailed, err
+		}
+	}
 	resp.Body.Close()
+
 	return time.Since(start), nil
 }

common/signal/timer.go

@@ -67,9 +67,9 @@ func (t *ActivityTimer) SetTimeout(timeout time.Duration) {
 		t.checkTask.Close()
 	}
 	t.checkTask = checkTask
-	t.Unlock()
 	t.Update()
 	common.Must(checkTask.Start())
+	t.Unlock()
 }
 
 func CancelAfterInactivity(ctx context.Context, cancel context.CancelFunc, timeout time.Duration) *ActivityTimer {

core/core.go

@@ -19,7 +19,7 @@ import (
 var (
 	Version_x byte = 25
 	Version_y byte = 6
-	Version_z byte = 7
+	Version_z byte = 8
 )
 
 var (

go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/stretchr/testify v1.10.0
 	github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
 	github.com/vishvananda/netlink v1.3.1
-	github.com/xtls/reality v0.0.0-20250607105625-90e738a94c8c
+	github.com/xtls/reality v0.0.0-20250608132114-50752aec6bfb
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
 	golang.org/x/crypto v0.39.0
 	golang.org/x/net v0.41.0
@@ -41,6 +41,7 @@ require (
 	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/google/btree v1.1.2 // indirect
 	github.com/google/pprof v0.0.0-20240528025155-186aa0362fba // indirect
+	github.com/juju/ratelimit v1.0.2 // indirect
 	github.com/klauspost/compress v1.17.8 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
 	github.com/onsi/ginkgo/v2 v2.19.0 // indirect

go.sum

@@ -34,6 +34,8 @@ github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aN
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/h12w/go-socks5 v0.0.0-20200522160539-76189e178364 h1:5XxdakFhqd9dnXoAZy1Mb2R/DZ6D1e+0bGC/JhucGYI=
 github.com/h12w/go-socks5 v0.0.0-20200522160539-76189e178364/go.mod h1:eDJQioIyy4Yn3MVivT7rv/39gAJTrA7lgmYr8EW950c=
+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 v1.17.8 h1:YcnTYrq7MikUT7k0Yb5eceMmALQPYBW/Xltxn0NAMnU=
 github.com/klauspost/compress v1.17.8/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/klauspost/cpuid/v2 v2.2.7 h1:ZWSB3igEs+d0qvnxR/ZBzXVmxkgt8DdzP6m9pfuVLDM=
@@ -76,8 +78,8 @@ github.com/vishvananda/netlink v1.3.1 h1:3AEMt62VKqz90r0tmNhog0r/PpWKmrEShJU0wJW
 github.com/vishvananda/netlink v1.3.1/go.mod h1:ARtKouGSTGchR8aMwmkzC0qiNPrrWO5JS/XMVl45+b4=
 github.com/vishvananda/netns v0.0.5 h1:DfiHV+j8bA32MFM7bfEunvT8IAqQ/NzSJHtcmW5zdEY=
 github.com/vishvananda/netns v0.0.5/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
-github.com/xtls/reality v0.0.0-20250607105625-90e738a94c8c h1:GiY3/SynO0ujSH3rQDEIrE4MTTZM9KHufR3zx3JLD3c=
-github.com/xtls/reality v0.0.0-20250607105625-90e738a94c8c/go.mod h1:Rkdcxe9Yd8SWQRRP+LSvX6wxk1m4lmNkyUZEHzbPDZw=
+github.com/xtls/reality v0.0.0-20250608132114-50752aec6bfb h1:X6ziJCMsFF8Ac/0F3W7+UbFdHZTu+r5nZ/smksHVxNQ=
+github.com/xtls/reality v0.0.0-20250608132114-50752aec6bfb/go.mod h1:yD47RN65bDLZgyHWMfFDiqlzrq4usDMt/Xzsk6tMbhw=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
 go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=

infra/conf/dns_proxy.go

@@ -30,7 +30,7 @@ func (c *DNSOutboundConfig) Build() (proto.Message, error) {
 	switch c.NonIPQuery {
 	case "":
 		c.NonIPQuery = "drop"
-	case "drop", "skip":
+	case "drop", "skip", "reject":
 	default:
 		return nil, errors.New(`unknown "nonIPQuery": `, c.NonIPQuery)
 	}

infra/conf/router_strategy.go

@@ -2,6 +2,7 @@ package conf
 
 import (
 	"google.golang.org/protobuf/proto"
+	"strings"
 
 	"github.com/xtls/xray-core/app/observatory/burst"
 	"github.com/xtls/xray-core/app/router"
@@ -51,15 +52,23 @@ type healthCheckSettings struct {
 	Interval      duration.Duration `json:"interval"`
 	SamplingCount int               `json:"sampling"`
 	Timeout       duration.Duration `json:"timeout"`
+	HttpMethod    string            `json:"httpMethod"`
 }
 
 func (h healthCheckSettings) Build() (proto.Message, error) {
+	var httpMethod string
+	if h.HttpMethod == "" {
+		httpMethod = "HEAD"
+	} else {
+		httpMethod = strings.TrimSpace(h.HttpMethod)
+	}
 	return &burst.HealthPingConfig{
 		Destination:   h.Destination,
 		Connectivity:  h.Connectivity,
 		Interval:      int64(h.Interval),
 		Timeout:       int64(h.Timeout),
 		SamplingCount: int32(h.SamplingCount),
+		HttpMethod:    httpMethod,
 	}, nil
 }
 

infra/conf/transport_internet.go

@@ -486,6 +486,12 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 	return config, nil
 }
 
+type LimitFallback struct {
+	AfterBytes       uint64
+	BytesPerSec      uint64
+	BurstBytesPerSec uint64
+}
+
 type REALITYConfig struct {
 	MasterKeyLog string          `json:"masterKeyLog"`
 	Show         bool            `json:"show"`
@@ -500,6 +506,9 @@ type REALITYConfig struct {
 	MaxTimeDiff  uint64          `json:"maxTimeDiff"`
 	ShortIds     []string        `json:"shortIds"`
 
+	LimitFallbackUpload   LimitFallback `json:"limitFallbackUpload"`
+	LimitFallbackDownload LimitFallback `json:"limitFallbackDownload"`
+
 	Fingerprint string `json:"fingerprint"`
 	ServerName  string `json:"serverName"`
 	Password    string `json:"password"`
@@ -600,6 +609,15 @@ func (c *REALITYConfig) Build() (proto.Message, error) {
 		config.Xver = c.Xver
 		config.ServerNames = c.ServerNames
 		config.MaxTimeDiff = c.MaxTimeDiff
+
+		config.LimitFallbackUpload = new(reality.LimitFallback)
+		config.LimitFallbackUpload.AfterBytes = c.LimitFallbackUpload.AfterBytes
+		config.LimitFallbackUpload.BytesPerSec = c.LimitFallbackUpload.BytesPerSec
+		config.LimitFallbackUpload.BurstBytesPerSec = c.LimitFallbackUpload.BurstBytesPerSec
+		config.LimitFallbackDownload = new(reality.LimitFallback)
+		config.LimitFallbackDownload.AfterBytes = c.LimitFallbackDownload.AfterBytes
+		config.LimitFallbackDownload.BytesPerSec = c.LimitFallbackDownload.BytesPerSec
+		config.LimitFallbackDownload.BurstBytesPerSec = c.LimitFallbackDownload.BurstBytesPerSec
 	} else {
 		config.Fingerprint = strings.ToLower(c.Fingerprint)
 		if config.Fingerprint == "unsafe" || config.Fingerprint == "hellogolang" {

proxy/dns/dns.go

@@ -187,6 +187,9 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 				if len(h.blockTypes) > 0 {
 					for _, blocktype := range h.blockTypes {
 						if blocktype == int32(qType) {
+							if h.nonIPQuery == "reject" {
+								go h.rejectNonIPQuery(id, qType, domain, writer)
+							}
 							errors.LogInfo(ctx, "blocked type ", qType, " query for domain ", domain)
 							return nil
 						}
@@ -199,6 +202,11 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 					b.Release()
 					continue
 				}
+				if h.nonIPQuery == "reject" {
+					go h.rejectNonIPQuery(id, qType, domain, writer)
+					b.Release()
+					continue
+				}
 			}
 
 			if err := connWriter.WriteMessage(b); err != nil {
@@ -317,6 +325,38 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 	}
 }
 
+func (h *Handler) rejectNonIPQuery(id uint16, qType dnsmessage.Type, domain string, writer dns_proto.MessageWriter) {
+	b := buf.New()
+	rawBytes := b.Extend(buf.Size)
+	builder := dnsmessage.NewBuilder(rawBytes[:0], dnsmessage.Header{
+		ID:                 id,
+		RCode:              dnsmessage.RCodeRefused,
+		RecursionAvailable: true,
+		RecursionDesired:   true,
+		Response:           true,
+		Authoritative:      true,
+	})
+	builder.EnableCompression()
+	common.Must(builder.StartQuestions())
+	common.Must(builder.Question(dnsmessage.Question{
+		Name:  dnsmessage.MustNewName(domain),
+		Class: dnsmessage.ClassINET,
+		Type:  qType,
+	}))
+
+	msgBytes, err := builder.Finish()
+	if err != nil {
+		errors.LogInfoInner(context.Background(), err, "pack reject message")
+		b.Release()
+		return
+	}
+	b.Resize(0, int32(len(msgBytes)))
+
+	if err := writer.WriteMessage(b); err != nil {
+		errors.LogInfoInner(context.Background(), err, "write reject answer")
+	}
+}
+
 type outboundConn struct {
 	access sync.Mutex
 	dialer func() (stat.Connection, error)

proxy/trojan/validator.go

@@ -53,6 +53,7 @@ func (v *Validator) Get(hash string) *protocol.MemoryUser {
 
 // Get a trojan user with hashed key, nil if user doesn't exist.
 func (v *Validator) GetByEmail(email string) *protocol.MemoryUser {
+	email = strings.ToLower(email)
 	u, _ := v.email.Load(email)
 	if u != nil {
 		return u.(*protocol.MemoryUser)

proxy/vless/validator.go

@@ -63,6 +63,7 @@ func (v *MemoryValidator) Get(id uuid.UUID) *protocol.MemoryUser {
 
 // Get a VLESS user with email, nil if user doesn't exist.
 func (v *MemoryValidator) GetByEmail(email string) *protocol.MemoryUser {
+	email = strings.ToLower(email)
 	u, _ := v.email.Load(email)
 	if u != nil {
 		return u.(*protocol.MemoryUser)

testing/scenarios/command_test.go

@@ -286,7 +286,13 @@ func TestCommanderListHandlers(t *testing.T) {
 		t.Error("unexpected nil response")
 	}
 
-	if diff := cmp.Diff(inboundResp.Inbounds, clientConfig.Inbound, protocmp.Transform()); diff != "" {
+	if diff := cmp.Diff(
+		inboundResp.Inbounds,
+		clientConfig.Inbound,
+		protocmp.Transform(),
+		cmpopts.SortSlices(func(a, b *core.InboundHandlerConfig) bool {
+			return a.Tag < b.Tag
+		})); diff != "" {
 		t.Fatalf("inbound response doesn't match config (-want +got):\n%s", diff)
 	}
 
@@ -296,7 +302,13 @@ func TestCommanderListHandlers(t *testing.T) {
 		t.Error("unexpected nil response")
 	}
 
-	if diff := cmp.Diff(outboundResp.Outbounds, clientConfig.Outbound, protocmp.Transform()); diff != "" {
+	if diff := cmp.Diff(
+		outboundResp.Outbounds,
+		clientConfig.Outbound,
+		protocmp.Transform(),
+		cmpopts.SortSlices(func(a, b *core.InboundHandlerConfig) bool {
+			return a.Tag < b.Tag
+		})); diff != "" {
 		t.Fatalf("outbound response doesn't match config (-want +got):\n%s", diff)
 	}
 }

transport/internet/reality/config.go

@@ -32,6 +32,16 @@ func (c *Config) GetREALITYConfig() *reality.Config {
 
 		KeyLogWriter: KeyLogWriterFromConfig(c),
 	}
+	if c.LimitFallbackUpload != nil {
+		config.LimitFallbackUpload.AfterBytes = c.LimitFallbackUpload.AfterBytes
+		config.LimitFallbackUpload.BytesPerSec = c.LimitFallbackUpload.BytesPerSec
+		config.LimitFallbackUpload.BurstBytesPerSec = c.LimitFallbackUpload.BurstBytesPerSec
+	}
+	if c.LimitFallbackDownload != nil {
+		config.LimitFallbackDownload.AfterBytes = c.LimitFallbackDownload.AfterBytes
+		config.LimitFallbackDownload.BytesPerSec = c.LimitFallbackDownload.BytesPerSec
+		config.LimitFallbackDownload.BurstBytesPerSec = c.LimitFallbackDownload.BurstBytesPerSec
+	}
 	config.ServerNames = make(map[string]bool)
 	for _, serverName := range c.ServerNames {
 		config.ServerNames[serverName] = true

transport/internet/reality/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.35.1
-// 	protoc        v5.28.2
+// 	protoc        v5.29.4
 // source: transport/internet/reality/config.proto
 
 package reality
@@ -42,6 +42,8 @@ type Config struct {
 	SpiderX               string         `protobuf:"bytes,25,opt,name=spider_x,json=spiderX,proto3" json:"spider_x,omitempty"`
 	SpiderY               []int64        `protobuf:"varint,26,rep,packed,name=spider_y,json=spiderY,proto3" json:"spider_y,omitempty"`
 	MasterKeyLog          string         `protobuf:"bytes,27,opt,name=master_key_log,json=masterKeyLog,proto3" json:"master_key_log,omitempty"`
+	LimitFallbackUpload   *LimitFallback `protobuf:"bytes,28,opt,name=limit_fallback_upload,json=limitFallbackUpload,proto3" json:"limit_fallback_upload,omitempty"`
+	LimitFallbackDownload *LimitFallback `protobuf:"bytes,29,opt,name=limit_fallback_download,json=limitFallbackDownload,proto3" json:"limit_fallback_download,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -193,6 +195,81 @@ func (x *Config) GetMasterKeyLog() string {
 	return ""
 }
 
+func (x *Config) GetLimitFallbackUpload() *LimitFallback {
+	if x != nil {
+		return x.LimitFallbackUpload
+	}
+	return nil
+}
+
+func (x *Config) GetLimitFallbackDownload() *LimitFallback {
+	if x != nil {
+		return x.LimitFallbackDownload
+	}
+	return nil
+}
+
+type LimitFallback struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	AfterBytes       uint64 `protobuf:"varint,1,opt,name=after_bytes,json=afterBytes,proto3" json:"after_bytes,omitempty"`
+	BytesPerSec      uint64 `protobuf:"varint,2,opt,name=bytes_per_sec,json=bytesPerSec,proto3" json:"bytes_per_sec,omitempty"`
+	BurstBytesPerSec uint64 `protobuf:"varint,3,opt,name=burst_bytes_per_sec,json=burstBytesPerSec,proto3" json:"burst_bytes_per_sec,omitempty"`
+}
+
+func (x *LimitFallback) Reset() {
+	*x = LimitFallback{}
+	mi := &file_transport_internet_reality_config_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *LimitFallback) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*LimitFallback) ProtoMessage() {}
+
+func (x *LimitFallback) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_reality_config_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use LimitFallback.ProtoReflect.Descriptor instead.
+func (*LimitFallback) Descriptor() ([]byte, []int) {
+	return file_transport_internet_reality_config_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *LimitFallback) GetAfterBytes() uint64 {
+	if x != nil {
+		return x.AfterBytes
+	}
+	return 0
+}
+
+func (x *LimitFallback) GetBytesPerSec() uint64 {
+	if x != nil {
+		return x.BytesPerSec
+	}
+	return 0
+}
+
+func (x *LimitFallback) GetBurstBytesPerSec() uint64 {
+	if x != nil {
+		return x.BurstBytesPerSec
+	}
+	return 0
+}
+
 var File_transport_internet_reality_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_reality_config_proto_rawDesc = []byte{
@@ -200,7 +277,7 @@ var file_transport_internet_reality_config_proto_rawDesc = []byte{
 	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79, 0x2f, 0x63, 0x6f, 0x6e,
 	0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x1f, 0x78, 0x72, 0x61, 0x79, 0x2e,
 	0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
-	0x65, 0x74, 0x2e, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79, 0x22, 0x82, 0x04, 0x0a, 0x06, 0x43,
+	0x65, 0x74, 0x2e, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79, 0x22, 0xce, 0x05, 0x0a, 0x06, 0x43,
 	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x73, 0x68, 0x6f, 0x77, 0x18, 0x01, 0x20,
 	0x01, 0x28, 0x08, 0x52, 0x04, 0x73, 0x68, 0x6f, 0x77, 0x12, 0x12, 0x0a, 0x04, 0x64, 0x65, 0x73,
 	0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x64, 0x65, 0x73, 0x74, 0x12, 0x12, 0x0a,
@@ -232,16 +309,37 @@ var file_transport_internet_reality_config_proto_rawDesc = []byte{
 	0x0a, 0x08, 0x73, 0x70, 0x69, 0x64, 0x65, 0x72, 0x5f, 0x79, 0x18, 0x1a, 0x20, 0x03, 0x28, 0x03,
 	0x52, 0x07, 0x73, 0x70, 0x69, 0x64, 0x65, 0x72, 0x59, 0x12, 0x24, 0x0a, 0x0e, 0x6d, 0x61, 0x73,
 	0x74, 0x65, 0x72, 0x5f, 0x6b, 0x65, 0x79, 0x5f, 0x6c, 0x6f, 0x67, 0x18, 0x1b, 0x20, 0x01, 0x28,
-	0x09, 0x52, 0x0c, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x4b, 0x65, 0x79, 0x4c, 0x6f, 0x67, 0x42,
-	0x7f, 0x0a, 0x23, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e,
+	0x09, 0x52, 0x0c, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x4b, 0x65, 0x79, 0x4c, 0x6f, 0x67, 0x12,
+	0x62, 0x0a, 0x15, 0x6c, 0x69, 0x6d, 0x69, 0x74, 0x5f, 0x66, 0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63,
+	0x6b, 0x5f, 0x75, 0x70, 0x6c, 0x6f, 0x61, 0x64, 0x18, 0x1c, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x2e,
+	0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e,
+	0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79,
+	0x2e, 0x4c, 0x69, 0x6d, 0x69, 0x74, 0x46, 0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63, 0x6b, 0x52, 0x13,
+	0x6c, 0x69, 0x6d, 0x69, 0x74, 0x46, 0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63, 0x6b, 0x55, 0x70, 0x6c,
+	0x6f, 0x61, 0x64, 0x12, 0x66, 0x0a, 0x17, 0x6c, 0x69, 0x6d, 0x69, 0x74, 0x5f, 0x66, 0x61, 0x6c,
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+	0x20, 0x01, 0x28, 0x0b, 0x32, 0x2e, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e,
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-	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
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+	0x61, 0x63, 0x6b, 0x44, 0x6f, 0x77, 0x6e, 0x6c, 0x6f, 0x61, 0x64, 0x22, 0x83, 0x01, 0x0a, 0x0d,
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+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79,
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+	0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79,
+	0xaa, 0x02, 0x1f, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72,
+	0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x52, 0x65, 0x61, 0x6c, 0x69,
+	0x74, 0x79, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -256,16 +354,19 @@ func file_transport_internet_reality_config_proto_rawDescGZIP() []byte {
 	return file_transport_internet_reality_config_proto_rawDescData
 }
 
-var file_transport_internet_reality_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_reality_config_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
 var file_transport_internet_reality_config_proto_goTypes = []any{
 	(*Config)(nil),        // 0: xray.transport.internet.reality.Config
+	(*LimitFallback)(nil), // 1: xray.transport.internet.reality.LimitFallback
 }
 var file_transport_internet_reality_config_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	1, // 0: xray.transport.internet.reality.Config.limit_fallback_upload:type_name -> xray.transport.internet.reality.LimitFallback
+	1, // 1: xray.transport.internet.reality.Config.limit_fallback_download:type_name -> xray.transport.internet.reality.LimitFallback
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
 }
 
 func init() { file_transport_internet_reality_config_proto_init() }
@@ -279,7 +380,7 @@ func file_transport_internet_reality_config_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_transport_internet_reality_config_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   1,
+			NumMessages:   2,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

transport/internet/reality/config.proto

@@ -25,4 +25,13 @@ message Config {
   string spider_x = 25;
   repeated int64 spider_y = 26;
   string master_key_log = 27;
+
+  LimitFallback limit_fallback_upload = 28;
+  LimitFallback limit_fallback_download = 29;
+}
+
+message LimitFallback {
+  uint64 after_bytes = 1;
+  uint64 bytes_per_sec = 2;
+  uint64 burst_bytes_per_sec = 3;
 }

transport/internet/tcp/hub.go

@@ -72,6 +72,7 @@ func ListenTCP(ctx context.Context, address net.Address, port net.Port, streamSe
 	}
 	if config := reality.ConfigFromStreamSettings(streamSettings); config != nil {
 		l.realityConfig = config.GetREALITYConfig()
+		go goreality.DetectPostHandshakeRecordsLens(l.realityConfig)
 	}
 
 	if tcpSettings.HeaderSettings != nil {