Added experiment to avoid sending the termination signal

(cherry picked from commit c5357e1f000054ba5836468922cae52a830c8019)

.gitignore

@@ -0,0 +1,28 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+*.DS_Store
+.idea
+*.zip
+*.tar.gz
+v2ray
+v2ctl
+mockgen
+vprotogen
+!infra/vprotogen/
+errorgen
+!common/errors/errorgen/
+*.dat

CODE_OF_CONDUCT.md

@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+https://t.me/projectXtls.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

app/dispatcher/default.go

@@ -4,6 +4,7 @@ package dispatcher
 
 import (
 	"context"
+	"github.com/xtls/xray-core/features/dns"
 	"strings"
 	"sync"
 	"time"
@@ -15,7 +16,6 @@ import (
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/core"
-	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/outbound"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
@@ -92,13 +92,14 @@ type DefaultDispatcher struct {
 	router routing.Router
 	policy policy.Manager
 	stats  stats.Manager
+	hosts  dns.HostsLookup
 }
 
 func init() {
 	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
 		d := new(DefaultDispatcher)
-		if err := core.RequireFeatures(ctx, func(om outbound.Manager, router routing.Router, pm policy.Manager, sm stats.Manager) error {
-			return d.Init(config.(*Config), om, router, pm, sm)
+		if err := core.RequireFeatures(ctx, func(om outbound.Manager, router routing.Router, pm policy.Manager, sm stats.Manager, dc dns.Client) error {
+			return d.Init(config.(*Config), om, router, pm, sm, dc)
 		}); err != nil {
 			return nil, err
 		}
@@ -107,11 +108,14 @@ func init() {
 }
 
 // Init initializes DefaultDispatcher.
-func (d *DefaultDispatcher) Init(config *Config, om outbound.Manager, router routing.Router, pm policy.Manager, sm stats.Manager) error {
+func (d *DefaultDispatcher) Init(config *Config, om outbound.Manager, router routing.Router, pm policy.Manager, sm stats.Manager, dc dns.Client) error {
 	d.ohm = om
 	d.router = router
 	d.policy = pm
 	d.stats = sm
+	if hosts, ok := dc.(dns.HostsLookup); ok {
+		d.hosts = hosts
+	}
 	return nil
 }
 
@@ -195,8 +199,8 @@ func shouldOverride(ctx context.Context, result SniffResult, request session.Sni
 		}
 		if fkr0, ok := fakeDNSEngine.(dns.FakeDNSEngineRev0); ok && protocolString != "bittorrent" && p == "fakedns" &&
 			destination.Address.Family().IsIP() && fkr0.IsIPInIPPool(destination.Address) {
-				newError("Using sniffer ", protocolString, " since the fake DNS missed").WriteToLog(session.ExportIDToError(ctx))
-				return true
+			newError("Using sniffer ", protocolString, " since the fake DNS missed").WriteToLog(session.ExportIDToError(ctx))
+			return true
 		}
 		if resultSubset, ok := result.(SnifferIsProtoSubsetOf); ok {
 			if resultSubset.IsProtoSubsetOf(p) {
@@ -237,7 +241,11 @@ func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destin
 				domain := result.Domain()
 				newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
 				destination.Address = net.ParseAddress(domain)
-				ob.Target = destination
+				if sniffingRequest.RouteOnly && result.Protocol() != "fakedns" {
+					ob.RouteTarget = destination
+				} else {
+					ob.Target = destination
+				}
 			}
 		}
 		go d.routedDispatch(ctx, outbound, destination)
@@ -255,7 +263,11 @@ func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destin
 				domain := result.Domain()
 				newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
 				destination.Address = net.ParseAddress(domain)
-				ob.Target = destination
+				if sniffingRequest.RouteOnly && result.Protocol() != "fakedns" {
+					ob.RouteTarget = destination
+				} else {
+					ob.Target = destination
+				}
 			}
 			d.routedDispatch(ctx, outbound, destination)
 		}()
@@ -263,6 +275,67 @@ func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destin
 	return inbound, nil
 }
 
+// DispatchLink implements routing.Dispatcher.
+func (d *DefaultDispatcher) DispatchLink(ctx context.Context, destination net.Destination, outbound *transport.Link) error {
+	if !destination.IsValid() {
+		return newError("Dispatcher: Invalid destination.")
+	}
+	ob := &session.Outbound{
+		Target: destination,
+	}
+	ctx = session.ContextWithOutbound(ctx, ob)
+	content := session.ContentFromContext(ctx)
+	if content == nil {
+		content = new(session.Content)
+		ctx = session.ContextWithContent(ctx, content)
+	}
+	sniffingRequest := content.SniffingRequest
+	switch {
+	case !sniffingRequest.Enabled:
+		go d.routedDispatch(ctx, outbound, destination)
+	case destination.Network != net.Network_TCP:
+		// Only metadata sniff will be used for non tcp connection
+		result, err := sniffer(ctx, nil, true)
+		if err == nil {
+			content.Protocol = result.Protocol()
+			if shouldOverride(ctx, result, sniffingRequest, destination) {
+				domain := result.Domain()
+				newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
+				destination.Address = net.ParseAddress(domain)
+				if sniffingRequest.RouteOnly && result.Protocol() != "fakedns" {
+					ob.RouteTarget = destination
+				} else {
+					ob.Target = destination
+				}
+			}
+		}
+		go d.routedDispatch(ctx, outbound, destination)
+	default:
+		go func() {
+			cReader := &cachedReader{
+				reader: outbound.Reader.(*pipe.Reader),
+			}
+			outbound.Reader = cReader
+			result, err := sniffer(ctx, cReader, sniffingRequest.MetadataOnly)
+			if err == nil {
+				content.Protocol = result.Protocol()
+			}
+			if err == nil && shouldOverride(ctx, result, sniffingRequest, destination) {
+				domain := result.Domain()
+				newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
+				destination.Address = net.ParseAddress(domain)
+				if sniffingRequest.RouteOnly && result.Protocol() != "fakedns" {
+					ob.RouteTarget = destination
+				} else {
+					ob.Target = destination
+				}
+			}
+			d.routedDispatch(ctx, outbound, destination)
+		}()
+	}
+	return nil
+}
+
 func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool) (SniffResult, error) {
 	payload := buf.New()
 	defer payload.Release()
@@ -310,9 +383,34 @@ func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool) (Sni
 }
 
 func (d *DefaultDispatcher) routedDispatch(ctx context.Context, link *transport.Link, destination net.Destination) {
+	ob := session.OutboundFromContext(ctx)
+	if d.hosts != nil && destination.Address.Family().IsDomain() {
+		proxied := d.hosts.LookupHosts(ob.Target.String())
+		if proxied != nil {
+			ro := ob.RouteTarget == destination
+			destination.Address = *proxied
+			if ro {
+				ob.RouteTarget = destination
+			} else {
+				ob.Target = destination
+			}
+		}
+	}
+
 	var handler outbound.Handler
 
-	if d.router != nil {
+	if forcedOutboundTag := session.GetForcedOutboundTagFromContext(ctx); forcedOutboundTag != "" {
+		ctx = session.SetForcedOutboundTagToContext(ctx, "")
+		if h := d.ohm.GetHandler(forcedOutboundTag); h != nil {
+			newError("taking platform initialized detour [", forcedOutboundTag, "] for [", destination, "]").WriteToLog(session.ExportIDToError(ctx))
+			handler = h
+		} else {
+			newError("non existing tag for platform initialized detour: ", forcedOutboundTag).AtError().WriteToLog(session.ExportIDToError(ctx))
+			common.Close(link.Writer)
+			common.Interrupt(link.Reader)
+			return
+		}
+	} else if d.router != nil {
 		if route, err := d.router.PickRoute(routing_session.AsRoutingContext(ctx)); err == nil {
 			tag := route.GetOutboundTag()
 			if h := d.ohm.GetHandler(tag); h != nil {

app/dns/dns.go

@@ -223,6 +223,22 @@ func (s *DNS) LookupIP(domain string, option dns.IPOption) ([]net.IP, error) {
 	return nil, newError("returning nil for domain ", domain).Base(errors.Combine(errs...))
 }
 
+// LookupHosts implements dns.HostsLookup.
+func (s *DNS) LookupHosts(domain string) *net.Address {
+	domain = strings.TrimSuffix(domain, ".")
+	if domain == "" {
+		return nil
+	}
+	// Normalize the FQDN form query
+	addrs := s.hosts.Lookup(domain, *s.ipOption)
+	if len(addrs) > 0 {
+		newError("domain replaced: ", domain, " -> ", addrs[0].String()).AtInfo().WriteToLog()
+		return &addrs[0]
+	}
+
+	return nil
+}
+
 // GetIPOption implements ClientWithIPOption.
 func (s *DNS) GetIPOption() *dns.IPOption {
 	return s.ipOption

app/dns/dnscommon.go

@@ -178,7 +178,7 @@ func parseResponse(payload []byte) (*IPRecord, error) {
 	ipRecord := &IPRecord{
 		ReqID:  h.ID,
 		RCode:  h.RCode,
-		Expire: now.Add(time.Second * 600),
+		Expire: now.Add(time.Minute * 30),
 	}
 
 L:

app/dns/nameserver_doh.go

@@ -114,7 +114,7 @@ func NewDoHLocalNameServer(url *url.URL) *DoHNameServer {
 			if err != nil {
 				return nil, err
 			}
-			conn, err := internet.DialSystem(ctx, dest, nil)
+			conn, err := internet.DialSystemDNS(ctx, dest, nil)
 			log.Record(&log.AccessMessage{
 				From:   "DoH",
 				To:     s.dohURL,

app/log/log_creator.go

@@ -1,6 +1,8 @@
 package log
 
 import (
+	"sync"
+	
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/log"
 )
@@ -13,16 +15,24 @@ type HandlerCreator func(LogType, HandlerCreatorOptions) (log.Handler, error)
 
 var handlerCreatorMap = make(map[LogType]HandlerCreator)
 
+var handlerCreatorMapLock = &sync.RWMutex{}
+
 func RegisterHandlerCreator(logType LogType, f HandlerCreator) error {
 	if f == nil {
 		return newError("nil HandlerCreator")
 	}
 
+	handlerCreatorMapLock.Lock()
+	defer handlerCreatorMapLock.Unlock()
+
 	handlerCreatorMap[logType] = f
 	return nil
 }
 
 func createHandler(logType LogType, options HandlerCreatorOptions) (log.Handler, error) {
+	handlerCreatorMapLock.RLock()
+	defer handlerCreatorMapLock.RUnlock()
+
 	creator, found := handlerCreatorMap[logType]
 	if !found {
 		return nil, newError("unable to create log handler for ", logType)

app/observatory/config.pb.go

@@ -0,0 +1,530 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
+// source: app/observatory/config.proto
+
+package observatory
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type ObservationResult struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Status []*OutboundStatus `protobuf:"bytes,1,rep,name=status,proto3" json:"status,omitempty"`
+}
+
+func (x *ObservationResult) Reset() {
+	*x = ObservationResult{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_config_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ObservationResult) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ObservationResult) ProtoMessage() {}
+
+func (x *ObservationResult) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_config_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ObservationResult.ProtoReflect.Descriptor instead.
+func (*ObservationResult) Descriptor() ([]byte, []int) {
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *ObservationResult) GetStatus() []*OutboundStatus {
+	if x != nil {
+		return x.Status
+	}
+	return nil
+}
+
+type OutboundStatus struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// @Document Whether this outbound is usable
+	//@Restriction ReadOnlyForUser
+	Alive bool `protobuf:"varint,1,opt,name=alive,proto3" json:"alive,omitempty"`
+	// @Document The time for probe request to finish.
+	//@Type time.ms
+	//@Restriction ReadOnlyForUser
+	Delay int64 `protobuf:"varint,2,opt,name=delay,proto3" json:"delay,omitempty"`
+	// @Document The last error caused this outbound failed to relay probe request
+	//@Restriction NotMachineReadable
+	LastErrorReason string `protobuf:"bytes,3,opt,name=last_error_reason,json=lastErrorReason,proto3" json:"last_error_reason,omitempty"`
+	// @Document The outbound tag for this Server
+	//@Type id.outboundTag
+	OutboundTag string `protobuf:"bytes,4,opt,name=outbound_tag,json=outboundTag,proto3" json:"outbound_tag,omitempty"`
+	// @Document The time this outbound is known to be alive
+	//@Type id.outboundTag
+	LastSeenTime int64 `protobuf:"varint,5,opt,name=last_seen_time,json=lastSeenTime,proto3" json:"last_seen_time,omitempty"`
+	// @Document The time this outbound is tried
+	//@Type id.outboundTag
+	LastTryTime int64 `protobuf:"varint,6,opt,name=last_try_time,json=lastTryTime,proto3" json:"last_try_time,omitempty"`
+}
+
+func (x *OutboundStatus) Reset() {
+	*x = OutboundStatus{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_config_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *OutboundStatus) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*OutboundStatus) ProtoMessage() {}
+
+func (x *OutboundStatus) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_config_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use OutboundStatus.ProtoReflect.Descriptor instead.
+func (*OutboundStatus) Descriptor() ([]byte, []int) {
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *OutboundStatus) GetAlive() bool {
+	if x != nil {
+		return x.Alive
+	}
+	return false
+}
+
+func (x *OutboundStatus) GetDelay() int64 {
+	if x != nil {
+		return x.Delay
+	}
+	return 0
+}
+
+func (x *OutboundStatus) GetLastErrorReason() string {
+	if x != nil {
+		return x.LastErrorReason
+	}
+	return ""
+}
+
+func (x *OutboundStatus) GetOutboundTag() string {
+	if x != nil {
+		return x.OutboundTag
+	}
+	return ""
+}
+
+func (x *OutboundStatus) GetLastSeenTime() int64 {
+	if x != nil {
+		return x.LastSeenTime
+	}
+	return 0
+}
+
+func (x *OutboundStatus) GetLastTryTime() int64 {
+	if x != nil {
+		return x.LastTryTime
+	}
+	return 0
+}
+
+type ProbeResult struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// @Document Whether this outbound is usable
+	//@Restriction ReadOnlyForUser
+	Alive bool `protobuf:"varint,1,opt,name=alive,proto3" json:"alive,omitempty"`
+	// @Document The time for probe request to finish.
+	//@Type time.ms
+	//@Restriction ReadOnlyForUser
+	Delay int64 `protobuf:"varint,2,opt,name=delay,proto3" json:"delay,omitempty"`
+	// @Document The error caused this outbound failed to relay probe request
+	//@Restriction NotMachineReadable
+	LastErrorReason string `protobuf:"bytes,3,opt,name=last_error_reason,json=lastErrorReason,proto3" json:"last_error_reason,omitempty"`
+}
+
+func (x *ProbeResult) Reset() {
+	*x = ProbeResult{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_config_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ProbeResult) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ProbeResult) ProtoMessage() {}
+
+func (x *ProbeResult) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_config_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ProbeResult.ProtoReflect.Descriptor instead.
+func (*ProbeResult) Descriptor() ([]byte, []int) {
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *ProbeResult) GetAlive() bool {
+	if x != nil {
+		return x.Alive
+	}
+	return false
+}
+
+func (x *ProbeResult) GetDelay() int64 {
+	if x != nil {
+		return x.Delay
+	}
+	return 0
+}
+
+func (x *ProbeResult) GetLastErrorReason() string {
+	if x != nil {
+		return x.LastErrorReason
+	}
+	return ""
+}
+
+type Intensity struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// @Document The time interval for a probe request in ms.
+	//@Type time.ms
+	ProbeInterval uint32 `protobuf:"varint,1,opt,name=probe_interval,json=probeInterval,proto3" json:"probe_interval,omitempty"`
+}
+
+func (x *Intensity) Reset() {
+	*x = Intensity{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_config_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Intensity) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Intensity) ProtoMessage() {}
+
+func (x *Intensity) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_config_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Intensity.ProtoReflect.Descriptor instead.
+func (*Intensity) Descriptor() ([]byte, []int) {
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *Intensity) GetProbeInterval() uint32 {
+	if x != nil {
+		return x.ProbeInterval
+	}
+	return 0
+}
+
+type Config struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// @Document The selectors for outbound under observation
+	SubjectSelector   []string `protobuf:"bytes,2,rep,name=subject_selector,json=subjectSelector,proto3" json:"subject_selector,omitempty"`
+	ProbeUrl          string   `protobuf:"bytes,3,opt,name=probe_url,json=probeUrl,proto3" json:"probe_url,omitempty"`
+	ProbeInterval     int64    `protobuf:"varint,4,opt,name=probe_interval,json=probeInterval,proto3" json:"probe_interval,omitempty"`
+	EnableConcurrency bool     `protobuf:"varint,5,opt,name=enable_concurrency,json=enableConcurrency,proto3" json:"enable_concurrency,omitempty"`
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_config_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_config_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *Config) GetSubjectSelector() []string {
+	if x != nil {
+		return x.SubjectSelector
+	}
+	return nil
+}
+
+func (x *Config) GetProbeUrl() string {
+	if x != nil {
+		return x.ProbeUrl
+	}
+	return ""
+}
+
+func (x *Config) GetProbeInterval() int64 {
+	if x != nil {
+		return x.ProbeInterval
+	}
+	return 0
+}
+
+func (x *Config) GetEnableConcurrency() bool {
+	if x != nil {
+		return x.EnableConcurrency
+	}
+	return false
+}
+
+var File_app_observatory_config_proto protoreflect.FileDescriptor
+
+var file_app_observatory_config_proto_rawDesc = []byte{
+	0x0a, 0x1c, 0x61, 0x70, 0x70, 0x2f, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f, 0x72,
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+	0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x6f, 0x62, 0x73, 0x65, 0x72,
+	0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0xaa, 0x02, 0x14, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70,
+	0x70, 0x2e, 0x4f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_app_observatory_config_proto_rawDescOnce sync.Once
+	file_app_observatory_config_proto_rawDescData = file_app_observatory_config_proto_rawDesc
+)
+
+func file_app_observatory_config_proto_rawDescGZIP() []byte {
+	file_app_observatory_config_proto_rawDescOnce.Do(func() {
+		file_app_observatory_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_app_observatory_config_proto_rawDescData)
+	})
+	return file_app_observatory_config_proto_rawDescData
+}
+
+var file_app_observatory_config_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_app_observatory_config_proto_goTypes = []interface{}{
+	(*ObservationResult)(nil), // 0: xray.core.app.observatory.ObservationResult
+	(*OutboundStatus)(nil),    // 1: xray.core.app.observatory.OutboundStatus
+	(*ProbeResult)(nil),       // 2: xray.core.app.observatory.ProbeResult
+	(*Intensity)(nil),         // 3: xray.core.app.observatory.Intensity
+	(*Config)(nil),            // 4: xray.core.app.observatory.Config
+}
+var file_app_observatory_config_proto_depIdxs = []int32{
+	1, // 0: xray.core.app.observatory.ObservationResult.status:type_name -> xray.core.app.observatory.OutboundStatus
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_app_observatory_config_proto_init() }
+func file_app_observatory_config_proto_init() {
+	if File_app_observatory_config_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_app_observatory_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ObservationResult); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_config_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*OutboundStatus); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_config_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ProbeResult); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_config_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Intensity); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_config_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Config); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_app_observatory_config_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   5,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_app_observatory_config_proto_goTypes,
+		DependencyIndexes: file_app_observatory_config_proto_depIdxs,
+		MessageInfos:      file_app_observatory_config_proto_msgTypes,
+	}.Build()
+	File_app_observatory_config_proto = out.File
+	file_app_observatory_config_proto_rawDesc = nil
+	file_app_observatory_config_proto_goTypes = nil
+	file_app_observatory_config_proto_depIdxs = nil
+}

app/observatory/config.proto

@@ -0,0 +1,73 @@
+syntax = "proto3";
+
+package xray.core.app.observatory;
+option csharp_namespace = "Xray.App.Observatory";
+option go_package = "github.com/xtls/xray-core/app/observatory";
+option java_package = "com.xray.app.observatory";
+option java_multiple_files = true;
+
+message ObservationResult {
+  repeated OutboundStatus status = 1;
+}
+
+message OutboundStatus{
+  /* @Document Whether this outbound is usable
+     @Restriction ReadOnlyForUser
+  */
+  bool alive = 1;
+  /* @Document The time for probe request to finish.
+     @Type time.ms
+     @Restriction ReadOnlyForUser
+  */
+  int64 delay = 2;
+  /* @Document The last error caused this outbound failed to relay probe request
+     @Restriction NotMachineReadable
+  */
+  string last_error_reason = 3;
+  /* @Document The outbound tag for this Server
+     @Type id.outboundTag
+  */
+  string outbound_tag = 4;
+  /* @Document The time this outbound is known to be alive
+   @Type id.outboundTag
+*/
+  int64 last_seen_time = 5;
+  /* @Document The time this outbound is tried
+   @Type id.outboundTag
+*/
+  int64 last_try_time = 6;
+}
+
+message ProbeResult{
+  /* @Document Whether this outbound is usable
+     @Restriction ReadOnlyForUser
+  */
+  bool alive = 1;
+  /* @Document The time for probe request to finish.
+     @Type time.ms
+     @Restriction ReadOnlyForUser
+  */
+  int64 delay = 2;
+  /* @Document The error caused this outbound failed to relay probe request
+   @Restriction NotMachineReadable
+*/
+  string last_error_reason = 3;
+}
+
+message Intensity{
+  /* @Document The time interval for a probe request in ms.
+     @Type time.ms
+  */
+  uint32 probe_interval = 1;
+}
+message Config {
+  /* @Document The selectors for outbound under observation
+  */
+  repeated string subject_selector = 2;
+
+  string probe_url = 3;
+
+  int64 probe_interval = 4;
+
+  bool enable_concurrency = 5;
+}

app/observatory/errors.generated.go

@@ -0,0 +1,9 @@
+package observatory
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}

app/observatory/explainErrors.go

@@ -0,0 +1,26 @@
+package observatory
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errorCollector struct {
+	errors *errors.Error
+}
+
+func (e *errorCollector) SubmitError(err error) {
+	if e.errors == nil {
+		e.errors = newError("underlying connection error").Base(err)
+		return
+	}
+	e.errors = e.errors.Base(newError("underlying connection error").Base(err))
+}
+
+func newErrorCollector() *errorCollector {
+	return &errorCollector{}
+}
+
+func (e *errorCollector) UnderlyingError() error {
+	if e.errors == nil {
+		return newError("failed to produce report")
+	}
+	return e.errors
+}

app/observatory/observatory.go

@@ -0,0 +1,3 @@
+package observatory
+
+//go:generate go run github.com/xtls/xray-core/common/errors/errorgen

app/observatory/observer.go

@@ -0,0 +1,222 @@
+package observatory
+
+import (
+	"context"
+	"github.com/xtls/xray-core/core"
+	"net"
+	"net/http"
+	"net/url"
+	"sort"
+	"sync"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+
+	"github.com/xtls/xray-core/common"
+	v2net "github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/signal/done"
+	"github.com/xtls/xray-core/common/task"
+	"github.com/xtls/xray-core/features/extension"
+	"github.com/xtls/xray-core/features/outbound"
+	"github.com/xtls/xray-core/transport/internet/tagged"
+)
+
+type Observer struct {
+	config *Config
+	ctx    context.Context
+
+	statusLock sync.Mutex
+	status     []*OutboundStatus
+
+	finished *done.Instance
+
+	ohm outbound.Manager
+
+	StatusUpdate func(result *OutboundStatus)
+}
+
+func (o *Observer) GetObservation(ctx context.Context) (proto.Message, error) {
+	return &ObservationResult{Status: o.status}, nil
+}
+
+func (o *Observer) Type() interface{} {
+	return extension.ObservatoryType()
+}
+
+func (o *Observer) Start() error {
+	if o.config != nil && len(o.config.SubjectSelector) != 0 {
+		o.finished = done.New()
+		go o.background()
+	}
+	return nil
+}
+
+func (o *Observer) Close() error {
+	if o.finished != nil {
+		return o.finished.Close()
+	}
+	return nil
+}
+
+func (o *Observer) background() {
+	for !o.finished.Done() {
+		hs, ok := o.ohm.(outbound.HandlerSelector)
+		if !ok {
+			newError("outbound.Manager is not a HandlerSelector").WriteToLog()
+			return
+		}
+
+		outbounds := hs.Select(o.config.SubjectSelector)
+		sort.Strings(outbounds)
+
+		o.updateStatus(outbounds)
+
+		for _, v := range outbounds {
+			result := o.probe(v)
+			o.updateStatusForResult(v, &result)
+			if o.finished.Done() {
+				return
+			}
+			sleepTime := time.Second * 10
+			if o.config.ProbeInterval != 0 {
+				sleepTime = time.Duration(o.config.ProbeInterval)
+			}
+			time.Sleep(sleepTime)
+		}
+	}
+}
+
+func (o *Observer) updateStatus(outbounds []string) {
+	o.statusLock.Lock()
+	defer o.statusLock.Unlock()
+	// TODO should remove old inbound that is removed
+	_ = outbounds
+}
+
+func (o *Observer) probe(outbound string) ProbeResult {
+	errorCollectorForRequest := newErrorCollector()
+
+	httpTransport := http.Transport{
+		Proxy: func(*http.Request) (*url.URL, error) {
+			return nil, nil
+		},
+		DialContext: func(ctx context.Context, network string, addr string) (net.Conn, error) {
+			var connection net.Conn
+			taskErr := task.Run(ctx, func() error {
+				// MUST use V2Fly's built in context system
+				dest, err := v2net.ParseDestination(network + ":" + addr)
+				if err != nil {
+					return newError("cannot understand address").Base(err)
+				}
+				trackedCtx := session.TrackedConnectionError(o.ctx, errorCollectorForRequest)
+				conn, err := tagged.Dialer(trackedCtx, dest, outbound)
+				if err != nil {
+					return newError("cannot dial remote address ", dest).Base(err)
+				}
+				connection = conn
+				return nil
+			})
+			if taskErr != nil {
+				return nil, newError("cannot finish connection").Base(taskErr)
+			}
+			return connection, nil
+		},
+		TLSHandshakeTimeout: time.Second * 5,
+	}
+	httpClient := &http.Client{
+		Transport: &httpTransport,
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+		Jar:     nil,
+		Timeout: time.Second * 5,
+	}
+	var GETTime time.Duration
+	err := task.Run(o.ctx, func() error {
+		startTime := time.Now()
+		probeURL := "https://api.v2fly.org/checkConnection.svgz"
+		if o.config.ProbeUrl != "" {
+			probeURL = o.config.ProbeUrl
+		}
+		response, err := httpClient.Get(probeURL)
+		if err != nil {
+			return newError("outbound failed to relay connection").Base(err)
+		}
+		if response.Body != nil {
+			response.Body.Close()
+		}
+		endTime := time.Now()
+		GETTime = endTime.Sub(startTime)
+		return nil
+	})
+	if err != nil {
+		fullerr := newError("underlying connection failed").Base(errorCollectorForRequest.UnderlyingError())
+		fullerr = newError("with outbound handler report").Base(fullerr)
+		fullerr = newError("GET request failed:", err).Base(fullerr)
+		fullerr = newError("the outbound ", outbound, " is dead:").Base(fullerr)
+		fullerr = fullerr.AtInfo()
+		fullerr.WriteToLog()
+		return ProbeResult{Alive: false, LastErrorReason: fullerr.Error()}
+	}
+	newError("the outbound ", outbound, " is alive:", GETTime.Seconds()).AtInfo().WriteToLog()
+	return ProbeResult{Alive: true, Delay: GETTime.Milliseconds()}
+}
+
+func (o *Observer) updateStatusForResult(outbound string, result *ProbeResult) {
+	o.statusLock.Lock()
+	defer o.statusLock.Unlock()
+	var status *OutboundStatus
+	if location := o.findStatusLocationLockHolderOnly(outbound); location != -1 {
+		status = o.status[location]
+	} else {
+		status = &OutboundStatus{}
+		o.status = append(o.status, status)
+	}
+
+	status.LastTryTime = time.Now().Unix()
+	status.OutboundTag = outbound
+	status.Alive = result.Alive
+	if result.Alive {
+		status.Delay = result.Delay
+		status.LastSeenTime = status.LastTryTime
+		status.LastErrorReason = ""
+	} else {
+		status.LastErrorReason = result.LastErrorReason
+		status.Delay = 99999999
+	}
+
+	if o.StatusUpdate != nil {
+		o.StatusUpdate(status)
+	}
+}
+
+func (o *Observer) findStatusLocationLockHolderOnly(outbound string) int {
+	for i, v := range o.status {
+		if v.OutboundTag == outbound {
+			return i
+		}
+	}
+	return -1
+}
+
+func New(ctx context.Context, config *Config) (*Observer, error) {
+	var outboundManager outbound.Manager
+	err := core.RequireFeatures(ctx, func(om outbound.Manager) {
+		outboundManager = om
+	})
+	if err != nil {
+		return nil, newError("Cannot get depended features").Base(err)
+	}
+	return &Observer{
+		config: config,
+		ctx:    ctx,
+		ohm:    outboundManager,
+	}, nil
+}
+
+func init() {
+	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
+		return New(ctx, config.(*Config))
+	}))
+}

app/observatory/persist.go

@@ -0,0 +1,12 @@
+package observatory
+
+func (o *Observer) UpdateStatus(result *OutboundStatus) {
+	o.statusLock.Lock()
+	defer o.statusLock.Unlock()
+
+	if location := o.findStatusLocationLockHolderOnly(result.OutboundTag); location != -1 {
+		o.status[location] = result
+	} else {
+		o.status = append(o.status, result)
+	}
+}

app/proxyman/config.pb.go

@@ -69,6 +69,64 @@ func (KnownProtocols) EnumDescriptor() ([]byte, []int) {
 	return file_app_proxyman_config_proto_rawDescGZIP(), []int{0}
 }
 
+type DomainStrategy int32
+
+const (
+	DomainStrategy_AS_IS      DomainStrategy = 0
+	DomainStrategy_USE_IP     DomainStrategy = 1
+	DomainStrategy_USE_IP4    DomainStrategy = 2
+	DomainStrategy_USE_IP6    DomainStrategy = 3
+	DomainStrategy_PREFER_IP4 DomainStrategy = 4
+	DomainStrategy_PREFER_IP6 DomainStrategy = 5
+)
+
+// Enum value maps for DomainStrategy.
+var (
+	DomainStrategy_name = map[int32]string{
+		0: "AS_IS",
+		1: "USE_IP",
+		2: "USE_IP4",
+		3: "USE_IP6",
+		4: "PREFER_IP4",
+		5: "PREFER_IP6",
+	}
+	DomainStrategy_value = map[string]int32{
+		"AS_IS":      0,
+		"USE_IP":     1,
+		"USE_IP4":    2,
+		"USE_IP6":    3,
+		"PREFER_IP4": 4,
+		"PREFER_IP6": 5,
+	}
+)
+
+func (x DomainStrategy) Enum() *DomainStrategy {
+	p := new(DomainStrategy)
+	*p = x
+	return p
+}
+
+func (x DomainStrategy) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (DomainStrategy) Descriptor() protoreflect.EnumDescriptor {
+	return file_app_proxyman_config_proto_enumTypes[1].Descriptor()
+}
+
+func (DomainStrategy) Type() protoreflect.EnumType {
+	return &file_app_proxyman_config_proto_enumTypes[1]
+}
+
+func (x DomainStrategy) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use DomainStrategy.Descriptor instead.
+func (DomainStrategy) EnumDescriptor() ([]byte, []int) {
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{1}
+}
+
 type AllocationStrategy_Type int32
 
 const (
@@ -105,11 +163,11 @@ func (x AllocationStrategy_Type) String() string {
 }
 
 func (AllocationStrategy_Type) Descriptor() protoreflect.EnumDescriptor {
-	return file_app_proxyman_config_proto_enumTypes[1].Descriptor()
+	return file_app_proxyman_config_proto_enumTypes[2].Descriptor()
 }
 
 func (AllocationStrategy_Type) Type() protoreflect.EnumType {
-	return &file_app_proxyman_config_proto_enumTypes[1]
+	return &file_app_proxyman_config_proto_enumTypes[2]
 }
 
 func (x AllocationStrategy_Type) Number() protoreflect.EnumNumber {
@@ -240,6 +298,7 @@ type SniffingConfig struct {
 	// Whether should only try to sniff metadata without waiting for client input.
 	// Can be used to support SMTP like protocol where server send the first message.
 	MetadataOnly bool `protobuf:"varint,4,opt,name=metadata_only,json=metadataOnly,proto3" json:"metadata_only,omitempty"`
+	RouteOnly    bool `protobuf:"varint,5,opt,name=route_only,json=routeOnly,proto3" json:"route_only,omitempty"`
 }
 
 func (x *SniffingConfig) Reset() {
@@ -302,6 +361,13 @@ func (x *SniffingConfig) GetMetadataOnly() bool {
 	return false
 }
 
+func (x *SniffingConfig) GetRouteOnly() bool {
+	if x != nil {
+		return x.RouteOnly
+	}
+	return false
+}
+
 type ReceiverConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -515,6 +581,7 @@ type SenderConfig struct {
 	StreamSettings    *internet.StreamConfig `protobuf:"bytes,2,opt,name=stream_settings,json=streamSettings,proto3" json:"stream_settings,omitempty"`
 	ProxySettings     *internet.ProxyConfig  `protobuf:"bytes,3,opt,name=proxy_settings,json=proxySettings,proto3" json:"proxy_settings,omitempty"`
 	MultiplexSettings *MultiplexingConfig    `protobuf:"bytes,4,opt,name=multiplex_settings,json=multiplexSettings,proto3" json:"multiplex_settings,omitempty"`
+	DomainStrategy    DomainStrategy         `protobuf:"varint,5,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.app.proxyman.DomainStrategy" json:"domain_strategy,omitempty"`
 }
 
 func (x *SenderConfig) Reset() {
@@ -577,6 +644,13 @@ func (x *SenderConfig) GetMultiplexSettings() *MultiplexingConfig {
 	return nil
 }
 
+func (x *SenderConfig) GetDomainStrategy() DomainStrategy {
+	if x != nil {
+		return x.DomainStrategy
+	}
+	return DomainStrategy_AS_IS
+}
+
 type MultiplexingConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -769,7 +843,7 @@ var file_app_proxyman_config_proto_rawDesc = []byte{
 	0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x2c, 0x0a, 0x04, 0x54, 0x79, 0x70, 0x65, 0x12,
 	0x0a, 0x0a, 0x06, 0x41, 0x6c, 0x77, 0x61, 0x79, 0x73, 0x10, 0x00, 0x12, 0x0a, 0x0a, 0x06, 0x52,
 	0x61, 0x6e, 0x64, 0x6f, 0x6d, 0x10, 0x01, 0x12, 0x0c, 0x0a, 0x08, 0x45, 0x78, 0x74, 0x65, 0x72,
-	0x6e, 0x61, 0x6c, 0x10, 0x02, 0x22, 0xad, 0x01, 0x0a, 0x0e, 0x53, 0x6e, 0x69, 0x66, 0x66, 0x69,
+	0x6e, 0x61, 0x6c, 0x10, 0x02, 0x22, 0xcc, 0x01, 0x0a, 0x0e, 0x53, 0x6e, 0x69, 0x66, 0x66, 0x69,
 	0x6e, 0x67, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x18, 0x0a, 0x07, 0x65, 0x6e, 0x61, 0x62,
 	0x6c, 0x65, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08, 0x52, 0x07, 0x65, 0x6e, 0x61, 0x62, 0x6c,
 	0x65, 0x64, 0x12, 0x31, 0x0a, 0x14, 0x64, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x61, 0x74, 0x69, 0x6f,
@@ -780,86 +854,99 @@ var file_app_proxyman_config_proto_rawDesc = []byte{
 	0x0f, 0x64, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x73, 0x45, 0x78, 0x63, 0x6c, 0x75, 0x64, 0x65, 0x64,
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+	0x0a, 0x0a, 0x06, 0x55, 0x53, 0x45, 0x5f, 0x49, 0x50, 0x10, 0x01, 0x12, 0x0b, 0x0a, 0x07, 0x55,
+	0x53, 0x45, 0x5f, 0x49, 0x50, 0x34, 0x10, 0x02, 0x12, 0x0b, 0x0a, 0x07, 0x55, 0x53, 0x45, 0x5f,
+	0x49, 0x50, 0x36, 0x10, 0x03, 0x12, 0x0e, 0x0a, 0x0a, 0x50, 0x52, 0x45, 0x46, 0x45, 0x52, 0x5f,
+	0x49, 0x50, 0x34, 0x10, 0x04, 0x12, 0x0e, 0x0a, 0x0a, 0x50, 0x52, 0x45, 0x46, 0x45, 0x52, 0x5f,
+	0x49, 0x50, 0x36, 0x10, 0x05, 0x42, 0x55, 0x0a, 0x15, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61,
+	0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x6d, 0x61, 0x6e, 0x50, 0x01,
+	0x5a, 0x26, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c,
+	0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f,
+	0x70, 0x72, 0x6f, 0x78, 0x79, 0x6d, 0x61, 0x6e, 0xaa, 0x02, 0x11, 0x58, 0x72, 0x61, 0x79, 0x2e,
+	0x41, 0x70, 0x70, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x6d, 0x61, 0x6e, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -874,48 +961,50 @@ func file_app_proxyman_config_proto_rawDescGZIP() []byte {
 	return file_app_proxyman_config_proto_rawDescData
 }
 
-var file_app_proxyman_config_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
+var file_app_proxyman_config_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
 var file_app_proxyman_config_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
 var file_app_proxyman_config_proto_goTypes = []interface{}{
 	(KnownProtocols)(0),                                      // 0: xray.app.proxyman.KnownProtocols
-	(AllocationStrategy_Type)(0),                             // 1: xray.app.proxyman.AllocationStrategy.Type
-	(*InboundConfig)(nil),                                    // 2: xray.app.proxyman.InboundConfig
-	(*AllocationStrategy)(nil),                               // 3: xray.app.proxyman.AllocationStrategy
-	(*SniffingConfig)(nil),                                   // 4: xray.app.proxyman.SniffingConfig
-	(*ReceiverConfig)(nil),                                   // 5: xray.app.proxyman.ReceiverConfig
-	(*InboundHandlerConfig)(nil),                             // 6: xray.app.proxyman.InboundHandlerConfig
-	(*OutboundConfig)(nil),                                   // 7: xray.app.proxyman.OutboundConfig
-	(*SenderConfig)(nil),                                     // 8: xray.app.proxyman.SenderConfig
-	(*MultiplexingConfig)(nil),                               // 9: xray.app.proxyman.MultiplexingConfig
-	(*AllocationStrategy_AllocationStrategyConcurrency)(nil), // 10: xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
-	(*AllocationStrategy_AllocationStrategyRefresh)(nil),     // 11: xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
-	(*net.PortRange)(nil),                                    // 12: xray.common.net.PortRange
-	(*net.IPOrDomain)(nil),                                   // 13: xray.common.net.IPOrDomain
-	(*internet.StreamConfig)(nil),                            // 14: xray.transport.internet.StreamConfig
-	(*serial.TypedMessage)(nil),                              // 15: xray.common.serial.TypedMessage
-	(*internet.ProxyConfig)(nil),                             // 16: xray.transport.internet.ProxyConfig
+	(DomainStrategy)(0),                                      // 1: xray.app.proxyman.DomainStrategy
+	(AllocationStrategy_Type)(0),                             // 2: xray.app.proxyman.AllocationStrategy.Type
+	(*InboundConfig)(nil),                                    // 3: xray.app.proxyman.InboundConfig
+	(*AllocationStrategy)(nil),                               // 4: xray.app.proxyman.AllocationStrategy
+	(*SniffingConfig)(nil),                                   // 5: xray.app.proxyman.SniffingConfig
+	(*ReceiverConfig)(nil),                                   // 6: xray.app.proxyman.ReceiverConfig
+	(*InboundHandlerConfig)(nil),                             // 7: xray.app.proxyman.InboundHandlerConfig
+	(*OutboundConfig)(nil),                                   // 8: xray.app.proxyman.OutboundConfig
+	(*SenderConfig)(nil),                                     // 9: xray.app.proxyman.SenderConfig
+	(*MultiplexingConfig)(nil),                               // 10: xray.app.proxyman.MultiplexingConfig
+	(*AllocationStrategy_AllocationStrategyConcurrency)(nil), // 11: xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
+	(*AllocationStrategy_AllocationStrategyRefresh)(nil),     // 12: xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
+	(*net.PortRange)(nil),                                    // 13: xray.common.net.PortRange
+	(*net.IPOrDomain)(nil),                                   // 14: xray.common.net.IPOrDomain
+	(*internet.StreamConfig)(nil),                            // 15: xray.transport.internet.StreamConfig
+	(*serial.TypedMessage)(nil),                              // 16: xray.common.serial.TypedMessage
+	(*internet.ProxyConfig)(nil),                             // 17: xray.transport.internet.ProxyConfig
 }
 var file_app_proxyman_config_proto_depIdxs = []int32{
-	1,  // 0: xray.app.proxyman.AllocationStrategy.type:type_name -> xray.app.proxyman.AllocationStrategy.Type
-	10, // 1: xray.app.proxyman.AllocationStrategy.concurrency:type_name -> xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
-	11, // 2: xray.app.proxyman.AllocationStrategy.refresh:type_name -> xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
-	12, // 3: xray.app.proxyman.ReceiverConfig.port_range:type_name -> xray.common.net.PortRange
-	13, // 4: xray.app.proxyman.ReceiverConfig.listen:type_name -> xray.common.net.IPOrDomain
-	3,  // 5: xray.app.proxyman.ReceiverConfig.allocation_strategy:type_name -> xray.app.proxyman.AllocationStrategy
-	14, // 6: xray.app.proxyman.ReceiverConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
+	2,  // 0: xray.app.proxyman.AllocationStrategy.type:type_name -> xray.app.proxyman.AllocationStrategy.Type
+	11, // 1: xray.app.proxyman.AllocationStrategy.concurrency:type_name -> xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
+	12, // 2: xray.app.proxyman.AllocationStrategy.refresh:type_name -> xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
+	13, // 3: xray.app.proxyman.ReceiverConfig.port_range:type_name -> xray.common.net.PortRange
+	14, // 4: xray.app.proxyman.ReceiverConfig.listen:type_name -> xray.common.net.IPOrDomain
+	4,  // 5: xray.app.proxyman.ReceiverConfig.allocation_strategy:type_name -> xray.app.proxyman.AllocationStrategy
+	15, // 6: xray.app.proxyman.ReceiverConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
 	0,  // 7: xray.app.proxyman.ReceiverConfig.domain_override:type_name -> xray.app.proxyman.KnownProtocols
-	4,  // 8: xray.app.proxyman.ReceiverConfig.sniffing_settings:type_name -> xray.app.proxyman.SniffingConfig
-	15, // 9: xray.app.proxyman.InboundHandlerConfig.receiver_settings:type_name -> xray.common.serial.TypedMessage
-	15, // 10: xray.app.proxyman.InboundHandlerConfig.proxy_settings:type_name -> xray.common.serial.TypedMessage
-	13, // 11: xray.app.proxyman.SenderConfig.via:type_name -> xray.common.net.IPOrDomain
-	14, // 12: xray.app.proxyman.SenderConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
-	16, // 13: xray.app.proxyman.SenderConfig.proxy_settings:type_name -> xray.transport.internet.ProxyConfig
-	9,  // 14: xray.app.proxyman.SenderConfig.multiplex_settings:type_name -> xray.app.proxyman.MultiplexingConfig
-	15, // [15:15] is the sub-list for method output_type
-	15, // [15:15] is the sub-list for method input_type
-	15, // [15:15] is the sub-list for extension type_name
-	15, // [15:15] is the sub-list for extension extendee
-	0,  // [0:15] is the sub-list for field type_name
+	5,  // 8: xray.app.proxyman.ReceiverConfig.sniffing_settings:type_name -> xray.app.proxyman.SniffingConfig
+	16, // 9: xray.app.proxyman.InboundHandlerConfig.receiver_settings:type_name -> xray.common.serial.TypedMessage
+	16, // 10: xray.app.proxyman.InboundHandlerConfig.proxy_settings:type_name -> xray.common.serial.TypedMessage
+	14, // 11: xray.app.proxyman.SenderConfig.via:type_name -> xray.common.net.IPOrDomain
+	15, // 12: xray.app.proxyman.SenderConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
+	17, // 13: xray.app.proxyman.SenderConfig.proxy_settings:type_name -> xray.transport.internet.ProxyConfig
+	10, // 14: xray.app.proxyman.SenderConfig.multiplex_settings:type_name -> xray.app.proxyman.MultiplexingConfig
+	1,  // 15: xray.app.proxyman.SenderConfig.domain_strategy:type_name -> xray.app.proxyman.DomainStrategy
+	16, // [16:16] is the sub-list for method output_type
+	16, // [16:16] is the sub-list for method input_type
+	16, // [16:16] is the sub-list for extension type_name
+	16, // [16:16] is the sub-list for extension extendee
+	0,  // [0:16] is the sub-list for field type_name
 }
 
 func init() { file_app_proxyman_config_proto_init() }
@@ -1050,7 +1139,7 @@ func file_app_proxyman_config_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_proxyman_config_proto_rawDesc,
-			NumEnums:      2,
+			NumEnums:      3,
 			NumMessages:   10,
 			NumExtensions: 0,
 			NumServices:   0,

app/proxyman/config.proto

@@ -61,6 +61,8 @@ message SniffingConfig {
   // Whether should only try to sniff metadata without waiting for client input.
   // Can be used to support SMTP like protocol where server send the first message.
   bool metadata_only = 4;
+
+  bool route_only = 5;
 }
 
 message ReceiverConfig {
@@ -86,12 +88,22 @@ message InboundHandlerConfig {
 
 message OutboundConfig {}
 
+enum DomainStrategy {
+  AS_IS = 0;
+  USE_IP = 1;
+  USE_IP4 = 2;
+  USE_IP6 = 3;
+  PREFER_IP4 = 4;
+  PREFER_IP6 = 5;
+}
+
 message SenderConfig {
   // Send traffic through the given IP. Only IP is allowed.
   xray.common.net.IPOrDomain via = 1;
   xray.transport.internet.StreamConfig stream_settings = 2;
   xray.transport.internet.ProxyConfig proxy_settings = 3;
   MultiplexingConfig multiplex_settings = 4;
+  DomainStrategy domain_strategy = 5;
 }
 
 message MultiplexingConfig {

app/proxyman/inbound/worker.go

@@ -101,6 +101,7 @@ func (w *tcpWorker) callback(conn stat.Connection) {
 		content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
 		content.SniffingRequest.ExcludeForDomain = w.sniffingConfig.DomainsExcluded
 		content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
+		content.SniffingRequest.RouteOnly = w.sniffingConfig.RouteOnly
 	}
 	ctx = session.ContextWithContent(ctx, content)
 
@@ -160,6 +161,11 @@ type udpConn struct {
 	done             *done.Instance
 	uplink           stats.Counter
 	downlink         stats.Counter
+	inactive         bool
+}
+
+func (c *udpConn) setInactive() {
+	c.inactive = true
 }
 
 func (c *udpConn) updateActivity() {
@@ -320,13 +326,18 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 				content.SniffingRequest.Enabled = w.sniffingConfig.Enabled
 				content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
 				content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
+				content.SniffingRequest.RouteOnly = w.sniffingConfig.RouteOnly
 			}
 			ctx = session.ContextWithContent(ctx, content)
 			if err := w.proxy.Process(ctx, net.Network_UDP, conn, w.dispatcher); err != nil {
 				newError("connection ends").Base(err).WriteToLog(session.ExportIDToError(ctx))
 			}
 			conn.Close()
-			w.removeConn(id)
+			// conn not removed by checker TODO may be lock worker here is better
+			if !conn.inactive {
+				conn.setInactive()
+				w.removeConn(id)
+			}
 		}()
 	}
 }
@@ -354,8 +365,11 @@ func (w *udpWorker) clean() error {
 	}
 
 	for addr, conn := range w.activeConn {
-		if nowSec-atomic.LoadInt64(&conn.lastActivityTime) > 300 {
-			delete(w.activeConn, addr)
+		if nowSec-atomic.LoadInt64(&conn.lastActivityTime) > 5*60 { // TODO Timeout too small
+			if !conn.inactive {
+				conn.setInactive()
+				delete(w.activeConn, addr)
+			}
 			conn.Close()
 		}
 	}
@@ -463,6 +477,7 @@ func (w *dsWorker) callback(conn stat.Connection) {
 		content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
 		content.SniffingRequest.ExcludeForDomain = w.sniffingConfig.DomainsExcluded
 		content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
+		content.SniffingRequest.RouteOnly = w.sniffingConfig.RouteOnly
 	}
 	ctx = session.ContextWithContent(ctx, content)
 

app/proxyman/outbound/handler.go

@@ -2,7 +2,7 @@ package outbound
 
 import (
 	"context"
-
+	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/transport/internet/stat"
 
 	"github.com/xtls/xray-core/app/proxyman"
@@ -54,6 +54,7 @@ type Handler struct {
 	streamSettings  *internet.MemoryStreamConfig
 	proxy           proxy.Outbound
 	outboundManager outbound.Manager
+	dnsClient       dns.Client
 	mux             *mux.ClientManager
 	uplinkCounter   stats.Counter
 	downlinkCounter stats.Counter
@@ -66,6 +67,7 @@ func NewHandler(ctx context.Context, config *core.OutboundHandlerConfig) (outbou
 	h := &Handler{
 		tag:             config.Tag,
 		outboundManager: v.GetFeature(outbound.ManagerType()).(outbound.Manager),
+		dnsClient:       v.GetFeature(dns.ClientType()).(dns.Client),
 		uplinkCounter:   uplinkCounter,
 		downlinkCounter: downlinkCounter,
 	}
@@ -140,7 +142,47 @@ func (h *Handler) Dispatch(ctx context.Context, link *transport.Link) {
 			common.Interrupt(link.Writer)
 		}
 	} else {
-		if err := h.proxy.Process(ctx, link, h); err != nil {
+		outbound := session.OutboundFromContext(ctx)
+		destination := outbound.Target
+		var domainString string
+		if destination.Address.Family().IsDomain() {
+			domainString = destination.Address.Domain()
+		} else if outbound.RouteTarget.Address != nil && outbound.RouteTarget.Address.Family().IsDomain() {
+			domainString = outbound.RouteTarget.Address.Domain()
+		} else {
+			domainString = ""
+		}
+
+		if h.senderSettings != nil && h.senderSettings.DomainStrategy != proxyman.DomainStrategy_AS_IS && domainString != "" {
+			var ips []net.IP
+			var err error
+
+			option := dns.IPOption{
+				IPv4Enable: true,
+				IPv6Enable: true,
+				FakeEnable: false,
+			}
+
+			switch h.senderSettings.DomainStrategy {
+			case proxyman.DomainStrategy_USE_IP4:
+				option.IPv6Enable = false
+			case proxyman.DomainStrategy_USE_IP6:
+				option.IPv4Enable = false
+			}
+			ips, err = h.dnsClient.LookupIP(domainString, option)
+			if err == nil {
+				switch h.senderSettings.DomainStrategy {
+				case proxyman.DomainStrategy_PREFER_IP4:
+					ips = reorderAddresses(ips, false)
+				case proxyman.DomainStrategy_PREFER_IP6:
+					ips = reorderAddresses(ips, true)
+				}
+				destination.Address = net.IPAddress(ips[0])
+				outbound.Target = destination
+			}
+		}
+		err := h.proxy.Process(ctx, link, h)
+		if err != nil {
 			// Ensure outbound ray is properly closed.
 			newError("failed to process outbound traffic").Base(err).WriteToLog(session.ExportIDToError(ctx))
 			common.Interrupt(link.Writer)
@@ -151,6 +193,18 @@ func (h *Handler) Dispatch(ctx context.Context, link *transport.Link) {
 	}
 }
 
+func reorderAddresses(ips []net.IP, preferIPv6 bool) []net.IP {
+	var result []net.IP
+	for i := 0; i < 2; i++ {
+		for _, ip := range ips {
+			if (preferIPv6 == (i == 0)) == (ip.To4() == nil) {
+				result = append(result, ip)
+			}
+		}
+	}
+	return result
+}
+
 // Address implements internet.Dialer.
 func (h *Handler) Address() net.Address {
 	if h.senderSettings == nil || h.senderSettings.Via == nil {

app/reverse/bridge.go

@@ -147,7 +147,7 @@ func (w *BridgeWorker) Connections() uint32 {
 	return w.worker.ActiveConnections()
 }
 
-func (w *BridgeWorker) handleInternalConn(link transport.Link) {
+func (w *BridgeWorker) handleInternalConn(link *transport.Link) {
 	go func() {
 		reader := link.Reader
 		for {
@@ -181,7 +181,7 @@ func (w *BridgeWorker) Dispatch(ctx context.Context, dest net.Destination) (*tra
 	uplinkReader, uplinkWriter := pipe.New(opt...)
 	downlinkReader, downlinkWriter := pipe.New(opt...)
 
-	w.handleInternalConn(transport.Link{
+	w.handleInternalConn(&transport.Link{
 		Reader: downlinkReader,
 		Writer: uplinkWriter,
 	})
@@ -191,3 +191,16 @@ func (w *BridgeWorker) Dispatch(ctx context.Context, dest net.Destination) (*tra
 		Writer: downlinkWriter,
 	}, nil
 }
+
+func (w *BridgeWorker) DispatchLink(ctx context.Context, dest net.Destination, link *transport.Link) error {
+	if !isInternalDomain(dest) {
+		ctx = session.ContextWithInbound(ctx, &session.Inbound{
+			Tag: w.tag,
+		})
+		return w.dispatcher.DispatchLink(ctx, dest, link)
+	}
+
+	w.handleInternalConn(link)
+
+	return nil
+}

app/router/balancing.go

@@ -1,7 +1,10 @@
 package router
 
 import (
+	"context"
+
 	"github.com/xtls/xray-core/common/dice"
+	"github.com/xtls/xray-core/features/extension"
 	"github.com/xtls/xray-core/features/outbound"
 )
 
@@ -41,3 +44,8 @@ func (b *Balancer) PickOutbound() (string, error) {
 	}
 	return tag, nil
 }
+func (b *Balancer) InjectContext(ctx context.Context) {
+	if contextReceiver, ok := b.strategy.(extension.ContextReceiver); ok {
+		contextReceiver.InjectContext(ctx)
+	}
+}

app/router/command/config.go

@@ -28,6 +28,14 @@ func (c routingContext) GetTargetPort() net.Port {
 	return net.Port(c.RoutingContext.GetTargetPort())
 }
 
+func (c routingContext) GetUid() uint32 {
+	return 0
+}
+
+func (c routingContext) GetAppStatus() []string {
+	return nil
+}
+
 // GetSkipDNSResolve is a mock implementation here to match the interface,
 // SkipDNSResolve is set from dns module, no use if coming from a protobuf object?
 // TODO: please confirm @Vigilans

app/router/condition.go

@@ -333,3 +333,49 @@ func (m *AttributeMatcher) Apply(ctx routing.Context) bool {
 	}
 	return m.Match(attributes)
 }
+
+type UidMatcher struct {
+	uidList map[uint32]bool
+}
+
+func NewUidMatcher(list *net.UidList) *UidMatcher {
+	m := UidMatcher{uidList: map[uint32]bool{}}
+	for _, uid := range list.Uid {
+		m.uidList[uid] = true
+	}
+	return &m
+}
+
+func (u UidMatcher) Apply(ctx routing.Context) bool {
+	return u.uidList[ctx.GetUid()]
+}
+
+type AppStatusMatcher struct {
+	appStatus map[string]bool
+}
+
+func NewAppStatusMatcher(appStatus []string) *AppStatusMatcher {
+	m := &AppStatusMatcher{
+		appStatus: map[string]bool{},
+	}
+
+	for _, status := range appStatus {
+		m.appStatus[status] = true
+	}
+
+	return m
+}
+
+// Apply implements Condition.
+func (m *AppStatusMatcher) Apply(ctx routing.Context) bool {
+	status := ctx.GetAppStatus()
+	if len(status) == 0 {
+		return false
+	}
+	for _, s := range status {
+		if !m.appStatus[s] {
+			return false
+		}
+	}
+	return true
+}

app/router/condition_geoip.go

@@ -13,11 +13,12 @@ type ipv6 struct {
 }
 
 type GeoIPMatcher struct {
-	countryCode string
-	ip4         []uint32
-	prefix4     []uint8
-	ip6         []ipv6
-	prefix6     []uint8
+	countryCode  string
+	reverseMatch bool
+	ip4          []uint32
+	prefix4      []uint8
+	ip6          []ipv6
+	prefix6      []uint8
 }
 
 func normalize4(ip uint32, prefix uint8) uint32 {
@@ -58,7 +59,7 @@ func (m *GeoIPMatcher) Init(cidrs []*CIDR) error {
 	m.ip6 = make([]ipv6, 0, ip6Count)
 	m.prefix6 = make([]uint8, 0, ip6Count)
 
-	for _, cidr := range cidrs {
+	for _, cidr := range cidrList {
 		ip := cidr.Ip
 		prefix := uint8(cidr.Prefix)
 		switch len(ip) {
@@ -80,6 +81,10 @@ func (m *GeoIPMatcher) Init(cidrs []*CIDR) error {
 	return nil
 }
 
+func (m *GeoIPMatcher) SetReverseMatch(isReverseMatch bool) {
+	m.reverseMatch = isReverseMatch
+}
+
 func (m *GeoIPMatcher) match4(ip uint32) bool {
 	if len(m.ip4) == 0 {
 		return false
@@ -147,8 +152,17 @@ func (m *GeoIPMatcher) match6(ip ipv6) bool {
 func (m *GeoIPMatcher) Match(ip net.IP) bool {
 	switch len(ip) {
 	case 4:
+		if m.reverseMatch {
+			return !m.match4(binary.BigEndian.Uint32(ip))
+		}
 		return m.match4(binary.BigEndian.Uint32(ip))
 	case 16:
+		if m.reverseMatch {
+			return !m.match6(ipv6{
+				a: binary.BigEndian.Uint64(ip[0:8]),
+				b: binary.BigEndian.Uint64(ip[8:16]),
+			})
+		}
 		return m.match6(ipv6{
 			a: binary.BigEndian.Uint64(ip[0:8]),
 			b: binary.BigEndian.Uint64(ip[8:16]),
@@ -168,14 +182,15 @@ type GeoIPMatcherContainer struct {
 func (c *GeoIPMatcherContainer) Add(geoip *GeoIP) (*GeoIPMatcher, error) {
 	if len(geoip.CountryCode) > 0 {
 		for _, m := range c.matchers {
-			if m.countryCode == geoip.CountryCode {
+			if m.countryCode == geoip.CountryCode && m.reverseMatch == geoip.ReverseMatch {
 				return m, nil
 			}
 		}
 	}
 
 	m := &GeoIPMatcher{
-		countryCode: geoip.CountryCode,
+		countryCode:  geoip.CountryCode,
+		reverseMatch: geoip.ReverseMatch,
 	}
 	if err := m.Init(geoip.Cidr); err != nil {
 		return nil, err

app/router/condition_geoip_test.go

@@ -125,6 +125,42 @@ func TestGeoIPMatcher(t *testing.T) {
 	}
 }
 
+func TestGeoIPReverseMatcher(t *testing.T) {
+	cidrList := router.CIDRList{
+		{Ip: []byte{8, 8, 8, 8}, Prefix: 32},
+		{Ip: []byte{91, 108, 4, 0}, Prefix: 16},
+	}
+	matcher := &router.GeoIPMatcher{}
+	matcher.SetReverseMatch(true) // Reverse match
+	common.Must(matcher.Init(cidrList))
+
+	testCases := []struct {
+		Input  string
+		Output bool
+	}{
+		{
+			Input:  "8.8.8.8",
+			Output: false,
+		},
+		{
+			Input:  "2001:cdba::3257:9652",
+			Output: true,
+		},
+		{
+			Input:  "91.108.255.254",
+			Output: false,
+		},
+	}
+
+	for _, testCase := range testCases {
+		ip := net.ParseAddress(testCase.Input).IP()
+		actual := matcher.Match(ip)
+		if actual != testCase.Output {
+			t.Error("expect input", testCase.Input, "to be", testCase.Output, ", but actually", actual)
+		}
+	}
+}
+
 func TestGeoIPMatcher4CN(t *testing.T) {
 	ips, err := loadGeoIP("CN")
 	common.Must(err)

app/router/config.go

@@ -150,6 +150,14 @@ func (rr *RoutingRule) BuildCondition() (Condition, error) {
 		conds.Add(cond)
 	}
 
+	if rr.UidList != nil && len(rr.UidList.Uid) > 0 {
+		conds.Add(NewUidMatcher(rr.UidList))
+	}
+
+	if len(rr.AppStatus) > 0 {
+		conds.Add(NewAppStatusMatcher(rr.AppStatus))
+	}
+
 	if conds.Len() == 0 {
 		return nil, newError("this rule has no effective fields").AtWarning()
 	}

app/router/config.pb.go

@@ -264,8 +264,9 @@ type GeoIP struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	CountryCode string  `protobuf:"bytes,1,opt,name=country_code,json=countryCode,proto3" json:"country_code,omitempty"`
-	Cidr        []*CIDR `protobuf:"bytes,2,rep,name=cidr,proto3" json:"cidr,omitempty"`
+	CountryCode  string  `protobuf:"bytes,1,opt,name=country_code,json=countryCode,proto3" json:"country_code,omitempty"`
+	Cidr         []*CIDR `protobuf:"bytes,2,rep,name=cidr,proto3" json:"cidr,omitempty"`
+	ReverseMatch bool    `protobuf:"varint,3,opt,name=reverse_match,json=reverseMatch,proto3" json:"reverse_match,omitempty"`
 }
 
 func (x *GeoIP) Reset() {
@@ -314,6 +315,13 @@ func (x *GeoIP) GetCidr() []*CIDR {
 	return nil
 }
 
+func (x *GeoIP) GetReverseMatch() bool {
+	if x != nil {
+		return x.ReverseMatch
+	}
+	return false
+}
+
 type GeoIPList struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -511,6 +519,8 @@ type RoutingRule struct {
 	Protocol       []string      `protobuf:"bytes,9,rep,name=protocol,proto3" json:"protocol,omitempty"`
 	Attributes     string        `protobuf:"bytes,15,opt,name=attributes,proto3" json:"attributes,omitempty"`
 	DomainMatcher  string        `protobuf:"bytes,17,opt,name=domain_matcher,json=domainMatcher,proto3" json:"domain_matcher,omitempty"`
+	UidList        *net.UidList  `protobuf:"bytes,18,opt,name=uid_list,json=uidList,proto3" json:"uid_list,omitempty"`
+	AppStatus      []string      `protobuf:"bytes,19,rep,name=app_status,json=appStatus,proto3" json:"app_status,omitempty"`
 }
 
 func (x *RoutingRule) Reset() {
@@ -675,6 +685,20 @@ func (x *RoutingRule) GetDomainMatcher() string {
 	return ""
 }
 
+func (x *RoutingRule) GetUidList() *net.UidList {
+	if x != nil {
+		return x.UidList
+	}
+	return nil
+}
+
+func (x *RoutingRule) GetAppStatus() []string {
+	if x != nil {
+		return x.AppStatus
+	}
+	return nil
+}
+
 type isRoutingRule_TargetTag interface {
 	isRoutingRule_TargetTag()
 }
@@ -700,6 +724,7 @@ type BalancingRule struct {
 
 	Tag              string   `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
 	OutboundSelector []string `protobuf:"bytes,2,rep,name=outbound_selector,json=outboundSelector,proto3" json:"outbound_selector,omitempty"`
+	Strategy         string   `protobuf:"bytes,3,opt,name=strategy,proto3" json:"strategy,omitempty"`
 }
 
 func (x *BalancingRule) Reset() {
@@ -748,6 +773,13 @@ func (x *BalancingRule) GetOutboundSelector() []string {
 	return nil
 }
 
+func (x *BalancingRule) GetStrategy() string {
+	if x != nil {
+		return x.Strategy
+	}
+	return ""
+}
+
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -907,128 +939,139 @@ var file_app_router_config_proto_rawDesc = []byte{
 	0x61, 0x70, 0x70, 0x2e, 0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x1a, 0x15, 0x63, 0x6f, 0x6d, 0x6d,
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+	0x10, 0x03, 0x42, 0x4f, 0x0a, 0x13, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61,
+	0x70, 0x70, 0x2e, 0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x50, 0x01, 0x5a, 0x24, 0x67, 0x69, 0x74,
+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61,
+	0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x72, 0x6f, 0x75, 0x74, 0x65,
+	0x72, 0xaa, 0x02, 0x0f, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x52, 0x6f, 0x75,
+	0x74, 0x65, 0x72, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1062,6 +1105,7 @@ var file_app_router_config_proto_goTypes = []interface{}{
 	(*net.PortList)(nil),       // 13: xray.common.net.PortList
 	(*net.NetworkList)(nil),    // 14: xray.common.net.NetworkList
 	(net.Network)(0),           // 15: xray.common.net.Network
+	(*net.UidList)(nil),        // 16: xray.common.net.UidList
 }
 var file_app_router_config_proto_depIdxs = []int32{
 	0,  // 0: xray.app.router.Domain.type:type_name -> xray.app.router.Domain.Type
@@ -1080,14 +1124,15 @@ var file_app_router_config_proto_depIdxs = []int32{
 	3,  // 13: xray.app.router.RoutingRule.source_cidr:type_name -> xray.app.router.CIDR
 	4,  // 14: xray.app.router.RoutingRule.source_geoip:type_name -> xray.app.router.GeoIP
 	13, // 15: xray.app.router.RoutingRule.source_port_list:type_name -> xray.common.net.PortList
-	1,  // 16: xray.app.router.Config.domain_strategy:type_name -> xray.app.router.Config.DomainStrategy
-	8,  // 17: xray.app.router.Config.rule:type_name -> xray.app.router.RoutingRule
-	9,  // 18: xray.app.router.Config.balancing_rule:type_name -> xray.app.router.BalancingRule
-	19, // [19:19] is the sub-list for method output_type
-	19, // [19:19] is the sub-list for method input_type
-	19, // [19:19] is the sub-list for extension type_name
-	19, // [19:19] is the sub-list for extension extendee
-	0,  // [0:19] is the sub-list for field type_name
+	16, // 16: xray.app.router.RoutingRule.uid_list:type_name -> xray.common.net.UidList
+	1,  // 17: xray.app.router.Config.domain_strategy:type_name -> xray.app.router.Config.DomainStrategy
+	8,  // 18: xray.app.router.Config.rule:type_name -> xray.app.router.RoutingRule
+	9,  // 19: xray.app.router.Config.balancing_rule:type_name -> xray.app.router.BalancingRule
+	20, // [20:20] is the sub-list for method output_type
+	20, // [20:20] is the sub-list for method input_type
+	20, // [20:20] is the sub-list for extension type_name
+	20, // [20:20] is the sub-list for extension extendee
+	0,  // [0:20] is the sub-list for field type_name
 }
 
 func init() { file_app_router_config_proto_init() }

app/router/config.proto

@@ -8,6 +8,7 @@ option java_multiple_files = true;
 
 import "common/net/port.proto";
 import "common/net/network.proto";
+import "common/net/uid.proto";
 
 // Domain for routing decision.
 message Domain {
@@ -54,6 +55,7 @@ message CIDR {
 message GeoIP {
   string country_code = 1;
   repeated CIDR cidr = 2;
+  bool reverse_match = 3;
 }
 
 message GeoIPList {
@@ -121,11 +123,16 @@ message RoutingRule {
   string attributes = 15;
 
   string domain_matcher = 17;
+
+  xray.common.net.UidList uid_list = 18;
+  repeated string app_status = 19;
+
 }
 
 message BalancingRule {
   string tag = 1;
   repeated string outbound_selector = 2;
+  string strategy = 3;
 }
 
 message Config {

app/router/strategy_leastping.go

@@ -0,0 +1,57 @@
+package router
+
+import (
+	"context"
+	"github.com/xtls/xray-core/core"
+
+	"github.com/xtls/xray-core/app/observatory"
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/features/extension"
+)
+
+type LeastPingStrategy struct {
+	ctx         context.Context
+	observatory extension.Observatory
+}
+
+func (l *LeastPingStrategy) InjectContext(ctx context.Context) {
+	common.Must(core.RequireFeatures(ctx, func(observatory extension.Observatory) error {
+		l.observatory = observatory
+		return nil
+	}))
+	l.ctx = ctx
+}
+
+func (l *LeastPingStrategy) PickOutbound(strings []string) string {
+	observeReport, err := l.observatory.GetObservation(l.ctx)
+	if err != nil {
+		newError("cannot get observe report").Base(err).WriteToLog()
+		return ""
+	}
+	outboundsList := outboundList(strings)
+	if result, ok := observeReport.(*observatory.ObservationResult); ok {
+		status := result.Status
+		leastPing := int64(99999999)
+		selectedOutboundName := ""
+		for _, v := range status {
+			if outboundsList.contains(v.OutboundTag) && v.Alive && v.Delay < leastPing {
+				selectedOutboundName = v.OutboundTag
+			}
+		}
+		return selectedOutboundName
+	}
+
+	//No way to understand observeReport
+	return ""
+}
+
+type outboundList []string
+
+func (o outboundList) contains(name string) bool {
+	for _, v := range o {
+		if v == name {
+			return true
+		}
+	}
+	return false
+}

common/antireplay/antireplay.go

@@ -0,0 +1,6 @@
+package antireplay
+
+type GeneralizedReplayFilter interface {
+	Interval() int64
+	Check(sum []byte) bool
+}

common/antireplay/bloomring.go

@@ -0,0 +1,36 @@
+package antireplay
+
+import (
+	"sync"
+
+	ss_bloomring "github.com/v2fly/ss-bloomring"
+)
+
+type BloomRing struct {
+	*ss_bloomring.BloomRing
+	lock *sync.Mutex
+}
+
+func (b BloomRing) Interval() int64 {
+	return 9999999
+}
+
+func (b BloomRing) Check(sum []byte) bool {
+	b.lock.Lock()
+	defer b.lock.Unlock()
+	if b.Test(sum) {
+		return false
+	}
+	b.Add(sum)
+	return true
+}
+
+func NewBloomRing() BloomRing {
+	const (
+		DefaultSFCapacity = 1e6
+		// FalsePositiveRate
+		DefaultSFFPR  = 1e-6
+		DefaultSFSlot = 10
+	)
+	return BloomRing{ss_bloomring.NewBloomRing(DefaultSFSlot, DefaultSFCapacity, DefaultSFFPR), &sync.Mutex{}}
+}

common/crypto/auth.go

@@ -43,6 +43,14 @@ func GenerateInitialAEADNonce() BytesGenerator {
 	return GenerateIncreasingNonce([]byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF})
 }
 
+func GenerateAEADNonceWithSize(nonceSize int) BytesGenerator {
+	c := make([]byte, nonceSize)
+	for i := 0; i < nonceSize; i++ {
+		c[i] = 0xFF
+	}
+	return GenerateIncreasingNonce(c)
+}
+
 type Authenticator interface {
 	NonceSize() int
 	Overhead() int

common/mux/server.go

@@ -56,6 +56,15 @@ func (s *Server) Dispatch(ctx context.Context, dest net.Destination) (*transport
 	return &transport.Link{Reader: downlinkReader, Writer: uplinkWriter}, nil
 }
 
+// DispatchLink implements routing.Dispatcher
+func (s *Server) DispatchLink(ctx context.Context, dest net.Destination, link *transport.Link) error {
+	if dest.Address != muxCoolAddress {
+		return s.dispatcher.DispatchLink(ctx, dest, link)
+	}
+	_, err := NewServerWorker(ctx, s.dispatcher, link)
+	return err
+}
+
 // Start implements common.Runnable.
 func (s *Server) Start() error {
 	return nil

common/net/uid.pb.go

@@ -0,0 +1,148 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
+// source: common/net/uid.proto
+
+package net
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// UidList represents a list of uid.
+type UidList struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The port that this range starts from.
+	Uid []uint32 `protobuf:"varint,1,rep,packed,name=uid,proto3" json:"uid,omitempty"`
+}
+
+func (x *UidList) Reset() {
+	*x = UidList{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_common_net_uid_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *UidList) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*UidList) ProtoMessage() {}
+
+func (x *UidList) ProtoReflect() protoreflect.Message {
+	mi := &file_common_net_uid_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use UidList.ProtoReflect.Descriptor instead.
+func (*UidList) Descriptor() ([]byte, []int) {
+	return file_common_net_uid_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *UidList) GetUid() []uint32 {
+	if x != nil {
+		return x.Uid
+	}
+	return nil
+}
+
+var File_common_net_uid_proto protoreflect.FileDescriptor
+
+var file_common_net_uid_proto_rawDesc = []byte{
+	0x0a, 0x14, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x6e, 0x65, 0x74, 0x2f, 0x75, 0x69, 0x64,
+	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0f, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d,
+	0x6d, 0x6f, 0x6e, 0x2e, 0x6e, 0x65, 0x74, 0x22, 0x1b, 0x0a, 0x07, 0x55, 0x69, 0x64, 0x4c, 0x69,
+	0x73, 0x74, 0x12, 0x10, 0x0a, 0x03, 0x75, 0x69, 0x64, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0d, 0x52,
+	0x03, 0x75, 0x69, 0x64, 0x42, 0x4f, 0x0a, 0x13, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79,
+	0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x6e, 0x65, 0x74, 0x50, 0x01, 0x5a, 0x24, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78,
+	0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f,
+	0x6e, 0x65, 0x74, 0xaa, 0x02, 0x0f, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x6f,
+	0x6e, 0x2e, 0x4e, 0x65, 0x74, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_common_net_uid_proto_rawDescOnce sync.Once
+	file_common_net_uid_proto_rawDescData = file_common_net_uid_proto_rawDesc
+)
+
+func file_common_net_uid_proto_rawDescGZIP() []byte {
+	file_common_net_uid_proto_rawDescOnce.Do(func() {
+		file_common_net_uid_proto_rawDescData = protoimpl.X.CompressGZIP(file_common_net_uid_proto_rawDescData)
+	})
+	return file_common_net_uid_proto_rawDescData
+}
+
+var file_common_net_uid_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_common_net_uid_proto_goTypes = []interface{}{
+	(*UidList)(nil), // 0: xray.common.net.UidList
+}
+var file_common_net_uid_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
+}
+
+func init() { file_common_net_uid_proto_init() }
+func file_common_net_uid_proto_init() {
+	if File_common_net_uid_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_common_net_uid_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*UidList); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_common_net_uid_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_common_net_uid_proto_goTypes,
+		DependencyIndexes: file_common_net_uid_proto_depIdxs,
+		MessageInfos:      file_common_net_uid_proto_msgTypes,
+	}.Build()
+	File_common_net_uid_proto = out.File
+	file_common_net_uid_proto_rawDesc = nil
+	file_common_net_uid_proto_goTypes = nil
+	file_common_net_uid_proto_depIdxs = nil
+}

common/net/uid.proto

@@ -0,0 +1,13 @@
+syntax = "proto3";
+
+package xray.common.net;
+option csharp_namespace = "Xray.Common.Net";
+option go_package = "github.com/xtls/xray-core/common/net";
+option java_package = "com.xray.common.net";
+option java_multiple_files = true;
+
+// UidList represents a list of uid.
+message UidList {
+  // The port that this range starts from.
+  repeated uint32 uid = 1;
+}

common/protocol/headers.go

@@ -38,6 +38,8 @@ const (
 	RequestOptionChunkMasking bitmask.Byte = 0x04
 
 	RequestOptionGlobalPadding bitmask.Byte = 0x08
+
+	RequestOptionAuthenticatedLength bitmask.Byte = 0x10
 )
 
 type RequestHeader struct {

common/session/context.go

@@ -11,6 +11,7 @@ const (
 	contentSessionKey
 	muxPreferedSessionKey
 	sockoptSessionKey
+	trackedConnectionErrorKey
 )
 
 // ContextWithID returns a new context with the given ID.
@@ -84,3 +85,33 @@ func SockoptFromContext(ctx context.Context) *Sockopt {
 	}
 	return nil
 }
+
+func GetForcedOutboundTagFromContext(ctx context.Context) string {
+	if ContentFromContext(ctx) == nil {
+		return ""
+	}
+	return ContentFromContext(ctx).Attribute("forcedOutboundTag")
+}
+
+func SetForcedOutboundTagToContext(ctx context.Context, tag string) context.Context {
+	if contentFromContext := ContentFromContext(ctx); contentFromContext == nil {
+		ctx = ContextWithContent(ctx, &Content{})
+	}
+	ContentFromContext(ctx).SetAttribute("forcedOutboundTag", tag)
+	return ctx
+}
+
+type TrackedRequestErrorFeedback interface {
+	SubmitError(err error)
+}
+
+func SubmitOutboundErrorToOriginator(ctx context.Context, err error) {
+	if errorTracker := ctx.Value(trackedConnectionErrorKey); errorTracker != nil {
+		errorTracker := errorTracker.(TrackedRequestErrorFeedback)
+		errorTracker.SubmitError(err)
+	}
+}
+
+func TrackedConnectionError(ctx context.Context, tracker TrackedRequestErrorFeedback) context.Context {
+	return context.WithValue(ctx, trackedConnectionErrorKey, tracker)
+}

common/session/session.go

@@ -48,12 +48,20 @@ type Inbound struct {
 	Conn net.Conn
 	// Timer of the inbound buf copier. May be nil.
 	Timer *signal.ActivityTimer
+
+	// Uid is the unix user id for the inbound connection
+	Uid uint32
+	// SagerNet private: AppStatus is the android app's status for the inbound connection
+	AppStatus []string
+	// SagerNet private
+	SkipFakeDNS bool
 }
 
 // Outbound is the metadata of an outbound connection.
 type Outbound struct {
 	// Target address of the outbound connection.
-	Target net.Destination
+	Target      net.Destination
+	RouteTarget net.Destination
 	// Gateway address
 	Gateway net.Address
 }
@@ -64,6 +72,7 @@ type SniffingRequest struct {
 	OverrideDestinationForProtocol []string
 	Enabled                        bool
 	MetadataOnly                   bool
+	RouteOnly                      bool
 }
 
 // Content is the metadata of the connection content.

core/context.go

@@ -25,3 +25,10 @@ func MustFromContext(ctx context.Context) *Instance {
 	}
 	return x
 }
+
+func WithContext(ctx context.Context, v *Instance) context.Context {
+	if FromContext(ctx) != v {
+		ctx = context.WithValue(ctx, xrayKey, v)
+	}
+	return ctx
+}

core/functions.go

@@ -15,7 +15,7 @@ import (
 func CreateObject(v *Instance, config interface{}) (interface{}, error) {
 	ctx := v.ctx
 	if v != nil {
-		ctx = context.WithValue(ctx, xrayKey, v)
+		ctx = WithContext(v.ctx, v)
 	}
 	return common.CreateObject(ctx, config)
 }
@@ -46,6 +46,8 @@ func StartInstance(configFormat string, configBytes []byte) (*Instance, error) {
 //
 // xray:api:stable
 func Dial(ctx context.Context, v *Instance, dest net.Destination) (net.Conn, error) {
+	ctx = WithContext(ctx, v)
+
 	dispatcher := v.GetFeature(routing.DispatcherType())
 	if dispatcher == nil {
 		return nil, newError("routing.Dispatcher is not registered in Xray core")
@@ -70,6 +72,8 @@ func Dial(ctx context.Context, v *Instance, dest net.Destination) (net.Conn, err
 //
 // xray:api:beta
 func DialUDP(ctx context.Context, v *Instance) (net.PacketConn, error) {
+	ctx = WithContext(ctx, v)
+
 	dispatcher := v.GetFeature(routing.DispatcherType())
 	if dispatcher == nil {
 		return nil, newError("routing.Dispatcher is not registered in Xray core")

features/dns/client.go

@@ -24,6 +24,10 @@ type Client interface {
 	LookupIP(domain string, option IPOption) ([]net.IP, error)
 }
 
+type HostsLookup interface {
+	LookupHosts(domain string) *net.Address
+}
+
 // ClientType returns the type of Client interface. Can be used for implementing common.HasType.
 //
 // xray:api:beta

features/extension/contextreceiver.go

@@ -0,0 +1,7 @@
+package extension
+
+import "context"
+
+type ContextReceiver interface {
+	InjectContext(ctx context.Context)
+}

features/extension/observatory.go

@@ -0,0 +1,19 @@
+package extension
+
+import (
+	"context"
+
+	"github.com/golang/protobuf/proto"
+
+	"github.com/xtls/xray-core/features"
+)
+
+type Observatory interface {
+	features.Feature
+
+	GetObservation(ctx context.Context) (proto.Message, error)
+}
+
+func ObservatoryType() interface{} {
+	return (*Observatory)(nil)
+}

features/routing/context.go

@@ -40,4 +40,8 @@ type Context interface {
 
 	// GetSkipDNSResolve returns a flag switch for weather skip dns resolve during route pick.
 	GetSkipDNSResolve() bool
+
+	GetUid() uint32
+
+	GetAppStatus() []string
 }

features/routing/dispatcher.go

@@ -17,6 +17,7 @@ type Dispatcher interface {
 
 	// Dispatch returns a Ray for transporting data for the given request.
 	Dispatch(ctx context.Context, dest net.Destination) (*transport.Link, error)
+	DispatchLink(ctx context.Context, dest net.Destination, link *transport.Link) error
 }
 
 // DispatcherType returns the type of Dispatcher interface. Can be used to implement common.HasType.

features/routing/dns/context.go

@@ -17,10 +17,6 @@ type ResolvableContext struct {
 
 // GetTargetIPs overrides original routing.Context's implementation.
 func (ctx *ResolvableContext) GetTargetIPs() []net.IP {
-	if ips := ctx.Context.GetTargetIPs(); len(ips) != 0 {
-		return ips
-	}
-
 	if len(ctx.resolvedIPs) > 0 {
 		return ctx.resolvedIPs
 	}
@@ -38,6 +34,10 @@ func (ctx *ResolvableContext) GetTargetIPs() []net.IP {
 		newError("resolve ip for ", domain).Base(err).WriteToLog()
 	}
 
+	if ips := ctx.Context.GetTargetIPs(); len(ips) != 0 {
+		return ips
+	}
+
 	return nil
 }
 

features/routing/session/context.go

@@ -70,7 +70,12 @@ func (ctx *Context) GetTargetDomain() string {
 	if ctx.Outbound == nil || !ctx.Outbound.Target.IsValid() {
 		return ""
 	}
-	dest := ctx.Outbound.Target
+	dest := ctx.Outbound.RouteTarget
+	if dest.IsValid() && dest.Address.Family().IsDomain() {
+		return dest.Address.Domain()
+	}
+
+	dest = ctx.Outbound.Target
 	if !dest.Address.Family().IsDomain() {
 		return ""
 	}
@@ -117,6 +122,28 @@ func (ctx *Context) GetSkipDNSResolve() bool {
 	return ctx.Content.SkipDNSResolve
 }
 
+// GetUid implements routing.Context.
+func (ctx *Context) GetUid() uint32 {
+	if ctx.Inbound == nil {
+		return 0
+	}
+	return ctx.Inbound.Uid
+}
+
+func (ctx *Context) GetAppStatus() []string {
+	if ctx.Inbound == nil {
+		return nil
+	}
+	return ctx.Inbound.AppStatus
+}
+
+func (ctx Context) GetSkipFakeDNS() bool {
+	if ctx.Inbound == nil {
+		return false
+	}
+	return ctx.Inbound.SkipFakeDNS
+}
+
 // AsRoutingContext creates a context from context.context with session info.
 func AsRoutingContext(ctx context.Context) routing.Context {
 	return &Context{

go.mod

@@ -15,6 +15,7 @@ require (
 	github.com/refraction-networking/utls v0.0.0-20210713165636-0b2885c8c0d4
 	github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c
 	github.com/stretchr/testify v1.7.0
+	github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
 	github.com/xtls/go v0.0.0-20210920065950-d4af136d3672
 	go.starlark.net v0.0.0-20211013185944-b0039bd2cfe3
 	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
@@ -37,6 +38,7 @@ require (
 	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/onsi/ginkgo v1.16.5 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 // indirect
 	golang.org/x/mod v0.5.1 // indirect
 	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/tools v0.1.7 // indirect

go.sum

@@ -31,7 +31,6 @@ github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165 h1:BS21ZUJ/B5X2UVUbczfmdWH7GapPWAhxcMsDnjJTU1E=
 github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165/go.mod h1:c9O8+fpSOX1DM8cPNSkX/qsBWdkD4yd2dpciOWQjpBw=
 github.com/dgryski/go-metro v0.0.0-20211015221634-2661b20a2446 h1:QnWGyQI3H080vbC9E4jlr6scOYEnALtvV/69oATYzOo=
 github.com/dgryski/go-metro v0.0.0-20211015221634-2661b20a2446/go.mod h1:c9O8+fpSOX1DM8cPNSkX/qsBWdkD4yd2dpciOWQjpBw=
@@ -140,7 +139,6 @@ github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
 github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
 github.com/onsi/ginkgo v1.14.0/go.mod h1:iSB4RoI2tjJc9BBv4NKIKWKya62Rps+oPG/Lv9klQyY=
 github.com/onsi/ginkgo v1.16.2/go.mod h1:CObGmKUOKaSC0RjmoAK7tKyn4Azo5P2IWuoMnvwxz1E=
-github.com/onsi/ginkgo v1.16.4 h1:29JGrr5oVBm5ulCWet69zQkzWipVXIol6ygQUe/EzNc=
 github.com/onsi/ginkgo v1.16.4/go.mod h1:dX+/inL/fNMqNlz0e9LfyB9TswhZpCVdJM/Z6Vvnwo0=
 github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
 github.com/onsi/ginkgo v1.16.5/go.mod h1:+E8gABHa3K6zRBolWtd+ROzc/U5bkGt0FwiG042wbpU=
@@ -165,6 +163,8 @@ github.com/prometheus/common v0.0.0-20180801064454-c7de2306084e/go.mod h1:daVV7q
 github.com/prometheus/procfs v0.0.0-20180725123919-05ee40e3a273/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/refraction-networking/utls v0.0.0-20210713165636-0b2885c8c0d4 h1:n9NMHJusHylTmtaJ0Qe0VV9dkTZLiwAxHmrI/l98GeE=
 github.com/refraction-networking/utls v0.0.0-20210713165636-0b2885c8c0d4/go.mod h1:tz9gX959MEFfFN5whTIocCLUG57WiILqtdVxI8c6Wj0=
+github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr8meMVVGxhp+QBTqY91tM8HjEuMjGg=
+github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3/go.mod h1:HgjTstvQsPGkxUsCd2KWxErBblirPizecHcpD3ffK+s=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c h1:pqy40B3MQWYrza7YZXOXgl0Nf0QGFqrOC0BKae1UNAA=
@@ -202,6 +202,8 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07/go.mod h1:kDXzergiv9cbyO7IOYJZWg1U88JhDg3PB6klq9Hg2pA=
+github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e h1:5QefA066A1tF8gHIiADmOVOV5LS43gt3ONnlEl3xkwI=
+github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e/go.mod h1:5t19P9LBIrNamL6AcMQOncg/r10y3Pc01AbHeMhwlpU=
 github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49uaYMPRU=
 github.com/viant/toolbox v0.24.0/go.mod h1:OxMCG57V0PXuIP2HNQrtJf2CjqdmbrOx5EkMILuUhzM=
 github.com/xtls/go v0.0.0-20210920065950-d4af136d3672 h1:4mkzGhKqt3JO1BWYjtD3iRFyAx4ow67hmSqOcGjuxqQ=
@@ -211,8 +213,6 @@ github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1
 github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
-go.starlark.net v0.0.0-20210901212718-87f333178d59 h1:F8ArBy9n1l7HE1JjzOIYqweEqoUlywy5+L3bR0tIa9g=
-go.starlark.net v0.0.0-20210901212718-87f333178d59/go.mod h1:t3mmBBPzAVvK0L0n1drDmrQsJ8FoIx4INCqVMTr/Zo0=
 go.starlark.net v0.0.0-20211013185944-b0039bd2cfe3 h1:oBcONsksxvpeodDrLjiMDaKHXKAVVfAydhe/792CE/o=
 go.starlark.net v0.0.0-20211013185944-b0039bd2cfe3/go.mod h1:t3mmBBPzAVvK0L0n1drDmrQsJ8FoIx4INCqVMTr/Zo0=
 go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1yOyC1qaOBpL57BhE=
@@ -224,8 +224,6 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20210920023735-84f357641f63 h1:kETrAMYZq6WVGPa8IIixL0CaEcIUNi+1WX7grUoi3y8=
-golang.org/x/crypto v0.0.0-20210920023735-84f357641f63/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 h1:7I4JAnoQBe7ZtJcBaYHi5UtiO8tQHbUSXxL+pnGRANg=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -233,12 +231,8 @@ golang.org/x/lint v0.0.0-20180702182130-06c8688daad7/go.mod h1:UVdnD1Gm6xHRNCYTk
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.5.0 h1:UG21uOlmZabA4fW5i7ZX6bjw1xELEGg/ZLgZq9auk/Q=
-golang.org/x/mod v0.5.0/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
 golang.org/x/mod v0.5.1 h1:OJxoQ/rynoF0dcCdI7cLPktw/hR2cueqYfjm43oqK38=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -260,8 +254,6 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20210917221730-978cfadd31cf h1:R150MpwJIv1MpS0N/pc+NhTM8ajzvlmxlY5OYsrevXQ=
-golang.org/x/net v0.0.0-20210917221730-978cfadd31cf/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211020060615-d418f374d309 h1:A0lJIi+hcTR6aajJH4YqKWwohY4aW9RO7oRMcdv+HKI=
 golang.org/x/net v0.0.0-20211020060615-d418f374d309/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -301,8 +293,6 @@ golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210908233432-aa78b53d3365/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210917161153-d61c044b1678 h1:J27LZFQBFoihqXoegpscI10HpjZ7B5WQLLKL2FZXQKw=
-golang.org/x/sys v0.0.0-20210917161153-d61c044b1678/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211020064051-0ec99a608a1b h1:byBDhtWGQmWDrv1MlEv/BzGRMkw36h9QqsNnZQcDhRw=
 golang.org/x/sys v0.0.0-20211020064051-0ec99a608a1b/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
@@ -325,12 +315,8 @@ golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.6 h1:SIasE1FVIQOWz2GEAHFOmoW7xchJcqlucjSULTL0Ag4=
-golang.org/x/tools v0.1.6/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 golang.org/x/tools v0.1.7 h1:6j8CgantCy3yc8JGBqkDLMKWqZ0RDU2g1HVgacojGWQ=
 golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -353,8 +339,6 @@ google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4 h1:ysnBoUyeL/H6RCvNRhWHjKoDEmguI+mPU+qHgK8qv/w=
-google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
 google.golang.org/genproto v0.0.0-20211019152133-63b7e35f4404 h1:ZB48alYoIN+Soc1OcXirVKYOhOOf6Pek+iN+L+pzQI4=
 google.golang.org/genproto v0.0.0-20211019152133-63b7e35f4404/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v1.14.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=

infra/conf/blackhole.go

@@ -2,7 +2,6 @@ package conf
 
 import (
 	"encoding/json"
-
 	"github.com/golang/protobuf/proto"
 
 	"github.com/xtls/xray-core/common/serial"

infra/conf/common.go

@@ -239,3 +239,11 @@ func (v *User) Build() *protocol.User {
 		Level: uint32(v.LevelByte),
 	}
 }
+
+type UidList []uint32
+
+func (l UidList) Build() *net.UidList {
+	return &net.UidList{
+		Uid: l,
+	}
+}

infra/conf/dns.go

@@ -3,6 +3,7 @@ package conf
 import (
 	"encoding/json"
 	"sort"
+	"strconv"
 	"strings"
 
 	"github.com/xtls/xray-core/app/dns"
@@ -19,28 +20,39 @@ type NameServerConfig struct {
 	ExpectIPs    StringList
 }
 
-func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
+func (c *NameServerConfig) UnmarshalJSON(data []byte) (err error) {
 	var address Address
-	if err := json.Unmarshal(data, &address); err == nil {
+	if err = json.Unmarshal(data, &address); err == nil {
 		c.Address = &address
-		return nil
+	} else {
+		var advanced struct {
+			Address      *Address   `json:"address"`
+			ClientIP     *Address   `json:"clientIp"`
+			Port         uint16     `json:"port"`
+			SkipFallback bool       `json:"skipFallback"`
+			Domains      []string   `json:"domains"`
+			ExpectIPs    StringList `json:"expectIps"`
+		}
+		if err = json.Unmarshal(data, &advanced); err == nil {
+			c.Address = advanced.Address
+			c.ClientIP = advanced.ClientIP
+			c.Port = advanced.Port
+			c.SkipFallback = advanced.SkipFallback
+			c.Domains = advanced.Domains
+			c.ExpectIPs = advanced.ExpectIPs
+		}
 	}
 
-	var advanced struct {
-		Address      *Address   `json:"address"`
-		ClientIP     *Address   `json:"clientIp"`
-		Port         uint16     `json:"port"`
-		SkipFallback bool       `json:"skipFallback"`
-		Domains      []string   `json:"domains"`
-		ExpectIPs    StringList `json:"expectIps"`
-	}
-	if err := json.Unmarshal(data, &advanced); err == nil {
-		c.Address = advanced.Address
-		c.ClientIP = advanced.ClientIP
-		c.Port = advanced.Port
-		c.SkipFallback = advanced.SkipFallback
-		c.Domains = advanced.Domains
-		c.ExpectIPs = advanced.ExpectIPs
+	if err == nil {
+		if c.Port == 0 && c.Address.Family().IsDomain() {
+			if host, port, err := net.SplitHostPort(c.Address.Domain()); err == nil {
+				port, err := strconv.Atoi(port)
+				if err == nil {
+					c.Address = &Address{Address: net.ParseAddress(host)}
+					c.Port = uint16(port)
+				}
+			}
+		}
 		return nil
 	}
 
@@ -88,7 +100,7 @@ func (c *NameServerConfig) Build() (*dns.NameServer, error) {
 		})
 	}
 
-	geoipList, err := toCidrList(c.ExpectIPs)
+	geoipList, err := ToCidrList(c.ExpectIPs)
 	if err != nil {
 		return nil, newError("invalid IP rule: ", c.ExpectIPs).Base(err)
 	}

infra/conf/loopback.go

@@ -0,0 +1,15 @@
+package conf
+
+import (
+	"github.com/golang/protobuf/proto"
+
+	"github.com/xtls/xray-core/proxy/loopback"
+)
+
+type LoopbackConfig struct {
+	InboundTag string `json:"inboundTag"`
+}
+
+func (l LoopbackConfig) Build() (proto.Message, error) {
+	return &loopback.Config{InboundTag: l.InboundTag}, nil
+}

infra/conf/observatory.go

@@ -0,0 +1,14 @@
+package conf
+
+import (
+	"github.com/golang/protobuf/proto"
+	"github.com/xtls/xray-core/app/observatory"
+)
+
+type ObservatoryConfig struct {
+	SubjectSelector []string `json:"subjectSelector"`
+}
+
+func (o ObservatoryConfig) Build() (proto.Message, error) {
+	return &observatory.Config{SubjectSelector: o.SubjectSelector}, nil
+}

infra/conf/router.go

@@ -399,21 +399,30 @@ func parseDomainRule(domain string) ([]*router.Domain, error) {
 	return []*router.Domain{domainRule}, nil
 }
 
-func toCidrList(ips StringList) ([]*router.GeoIP, error) {
+func ToCidrList(ips StringList) ([]*router.GeoIP, error) {
 	var geoipList []*router.GeoIP
 	var customCidrs []*router.CIDR
 
 	for _, ip := range ips {
 		if strings.HasPrefix(ip, "geoip:") {
 			country := ip[6:]
+			isReverseMatch := false
+			if strings.HasPrefix(ip, "geoip:!") {
+				country = ip[7:]
+				isReverseMatch = true
+			}
+			if len(country) == 0 {
+				return nil, newError("empty country name in rule")
+			}
 			geoip, err := loadGeoIP(strings.ToUpper(country))
 			if err != nil {
 				return nil, newError("failed to load GeoIP: ", country).Base(err)
 			}
 
 			geoipList = append(geoipList, &router.GeoIP{
-				CountryCode: strings.ToUpper(country),
-				Cidr:        geoip,
+				CountryCode:  strings.ToUpper(country),
+				Cidr:         geoip,
+				ReverseMatch: isReverseMatch,
 			})
 			continue
 		}
@@ -436,14 +445,24 @@ func toCidrList(ips StringList) ([]*router.GeoIP, error) {
 
 			filename := kv[0]
 			country := kv[1]
+			if len(filename) == 0 || len(country) == 0 {
+				return nil, newError("empty filename or empty country in rule")
+			}
+
+			isReverseMatch := false
+			if strings.HasPrefix(country, "!") {
+				country = country[1:]
+				isReverseMatch = true
+			}
 			geoip, err := loadIP(filename, strings.ToUpper(country))
 			if err != nil {
 				return nil, newError("failed to load IPs: ", country, " from ", filename).Base(err)
 			}
 
 			geoipList = append(geoipList, &router.GeoIP{
-				CountryCode: strings.ToUpper(filename + "_" + country),
-				Cidr:        geoip,
+				CountryCode:  strings.ToUpper(filename + "_" + country),
+				Cidr:         geoip,
+				ReverseMatch: isReverseMatch,
 			})
 
 			continue
@@ -479,6 +498,8 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		InboundTag *StringList  `json:"inboundTag"`
 		Protocols  *StringList  `json:"protocol"`
 		Attributes string       `json:"attrs"`
+		UidList    *UidList     `json:"uidList"`
+		AppStatus  *StringList  `json:"appStatus"`
 	}
 	rawFieldRule := new(RawFieldRule)
 	err := json.Unmarshal(msg, rawFieldRule)
@@ -525,7 +546,7 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 	}
 
 	if rawFieldRule.IP != nil {
-		geoipList, err := toCidrList(*rawFieldRule.IP)
+		geoipList, err := ToCidrList(*rawFieldRule.IP)
 		if err != nil {
 			return nil, err
 		}
@@ -541,7 +562,7 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 	}
 
 	if rawFieldRule.SourceIP != nil {
-		geoipList, err := toCidrList(*rawFieldRule.SourceIP)
+		geoipList, err := ToCidrList(*rawFieldRule.SourceIP)
 		if err != nil {
 			return nil, err
 		}
@@ -574,6 +595,16 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		rule.Attributes = rawFieldRule.Attributes
 	}
 
+	if rawFieldRule.UidList != nil && len(*rawFieldRule.UidList) > 0 {
+		rule.UidList = rawFieldRule.UidList.Build()
+	}
+
+	if rawFieldRule.AppStatus != nil && rawFieldRule.AppStatus.Len() > 0 {
+		for _, s := range *rawFieldRule.AppStatus {
+			rule.AppStatus = append(rule.AppStatus, s)
+		}
+	}
+
 	return rule, nil
 }
 
@@ -583,21 +614,21 @@ func ParseRule(msg json.RawMessage) (*router.RoutingRule, error) {
 	if err != nil {
 		return nil, newError("invalid router rule").Base(err)
 	}
-	if rawRule.Type == "field" {
+	if strings.EqualFold(rawRule.Type, "field") {
 		fieldrule, err := parseFieldRule(msg)
 		if err != nil {
 			return nil, newError("invalid field rule").Base(err)
 		}
 		return fieldrule, nil
 	}
-	if rawRule.Type == "chinaip" {
+	if strings.EqualFold(rawRule.Type, "chinaip") {
 		chinaiprule, err := parseChinaIPRule(msg)
 		if err != nil {
 			return nil, newError("invalid chinaip rule").Base(err)
 		}
 		return chinaiprule, nil
 	}
-	if rawRule.Type == "chinasites" {
+	if strings.EqualFold(rawRule.Type, "chinasites") {
 		chinasitesrule, err := parseChinaSitesRule(msg)
 		if err != nil {
 			return nil, newError("invalid chinasites rule").Base(err)

infra/conf/router_test.go

@@ -2,15 +2,53 @@ package conf_test
 
 import (
 	"encoding/json"
+	"os"
+	"path/filepath"
 	"testing"
+	_ "unsafe"
 
 	"github.com/golang/protobuf/proto"
 
 	"github.com/xtls/xray-core/app/router"
+	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/platform"
+	"github.com/xtls/xray-core/common/platform/filesystem"
 	. "github.com/xtls/xray-core/infra/conf"
 )
 
+func init() {
+	wd, err := os.Getwd()
+	common.Must(err)
+
+	if _, err := os.Stat(platform.GetAssetLocation("geoip.dat")); err != nil && os.IsNotExist(err) {
+		common.Must(filesystem.CopyFile(platform.GetAssetLocation("geoip.dat"), filepath.Join(wd, "..", "..", "resources", "geoip.dat")))
+	}
+
+	os.Setenv("xray.location.asset", wd)
+}
+
+func TestToCidrList(t *testing.T) {
+	t.Log(os.Getenv("xray.location.asset"))
+
+	common.Must(filesystem.CopyFile(platform.GetAssetLocation("geoiptestrouter.dat"), "geoip.dat"))
+
+	ips := StringList([]string{
+		"geoip:us",
+		"geoip:cn",
+		"geoip:!cn",
+		"ext:geoiptestrouter.dat:!cn",
+		"ext:geoiptestrouter.dat:ca",
+		"ext-ip:geoiptestrouter.dat:!cn",
+		"ext-ip:geoiptestrouter.dat:!ca",
+	})
+
+	_, err := ToCidrList(ips)
+	if err != nil {
+		t.Fatalf("Failed to parse geoip list, got %s", err)
+	}
+}
+
 func TestRouterConfig(t *testing.T) {
 	createParser := func() func(string) (proto.Message, error) {
 		return func(s string) (proto.Message, error) {

infra/conf/serial/builder.go

@@ -35,8 +35,6 @@ var ReaderDecoderByFormat = make(map[string]readerDecoder)
 
 func init() {
 	ReaderDecoderByFormat["json"] = DecodeJSONConfig
-	ReaderDecoderByFormat["yaml"] = DecodeYAMLConfig
-	ReaderDecoderByFormat["toml"] = DecodeTOMLConfig
 
 	core.ConfigBuilderForFiles = BuildConfig
 }

infra/conf/serial/loader.go

@@ -3,15 +3,11 @@ package serial
 import (
 	"bytes"
 	"encoding/json"
-	"io"
-
-	"github.com/ghodss/yaml"
-	"github.com/pelletier/go-toml"
-
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/infra/conf"
 	json_reader "github.com/xtls/xray-core/infra/conf/json"
+	"io"
 )
 
 type offset struct {
@@ -83,68 +79,3 @@ func LoadJSONConfig(reader io.Reader) (*core.Config, error) {
 
 	return pbConfig, nil
 }
-
-// DecodeTOMLConfig reads from reader and decode the config into *conf.Config
-// using github.com/pelletier/go-toml and map to convert toml to json.
-func DecodeTOMLConfig(reader io.Reader) (*conf.Config, error) {
-	tomlFile, err := io.ReadAll(reader)
-	if err != nil {
-		return nil, newError("failed to read config file").Base(err)
-	}
-
-	configMap := make(map[string]interface{})
-	if err := toml.Unmarshal(tomlFile, &configMap); err != nil {
-		return nil, newError("failed to convert toml to map").Base(err)
-	}
-
-	jsonFile, err := json.Marshal(&configMap)
-	if err != nil {
-		return nil, newError("failed to convert map to json").Base(err)
-	}
-
-	return DecodeJSONConfig(bytes.NewReader(jsonFile))
-}
-
-func LoadTOMLConfig(reader io.Reader) (*core.Config, error) {
-	tomlConfig, err := DecodeTOMLConfig(reader)
-	if err != nil {
-		return nil, err
-	}
-
-	pbConfig, err := tomlConfig.Build()
-	if err != nil {
-		return nil, newError("failed to parse toml config").Base(err)
-	}
-
-	return pbConfig, nil
-}
-
-// DecodeYAMLConfig reads from reader and decode the config into *conf.Config
-// using github.com/ghodss/yaml to convert yaml to json.
-func DecodeYAMLConfig(reader io.Reader) (*conf.Config, error) {
-	yamlFile, err := io.ReadAll(reader)
-	if err != nil {
-		return nil, newError("failed to read config file").Base(err)
-	}
-
-	jsonFile, err := yaml.YAMLToJSON(yamlFile)
-	if err != nil {
-		return nil, newError("failed to convert yaml to json").Base(err)
-	}
-
-	return DecodeJSONConfig(bytes.NewReader(jsonFile))
-}
-
-func LoadYAMLConfig(reader io.Reader) (*core.Config, error) {
-	yamlConfig, err := DecodeYAMLConfig(reader)
-	if err != nil {
-		return nil, err
-	}
-
-	pbConfig, err := yamlConfig.Build()
-	if err != nil {
-		return nil, newError("failed to parse yaml config").Base(err)
-	}
-
-	return pbConfig, nil
-}

infra/conf/shadowsocks.go

@@ -18,6 +18,8 @@ func cipherFromString(c string) shadowsocks.CipherType {
 		return shadowsocks.CipherType_AES_256_GCM
 	case "chacha20-poly1305", "aead_chacha20_poly1305", "chacha20-ietf-poly1305":
 		return shadowsocks.CipherType_CHACHA20_POLY1305
+	case "xchacha20-poly1305", "aead_xchacha20_poly1305", "xchacha20-ietf-poly1305":
+		return shadowsocks.CipherType_XCHACHA20_POLY1305
 	case "none", "plain":
 		return shadowsocks.CipherType_NONE
 	default:
@@ -39,6 +41,7 @@ type ShadowsocksServerConfig struct {
 	Email       string                   `json:"email"`
 	Users       []*ShadowsocksUserConfig `json:"clients"`
 	NetworkList *NetworkList             `json:"network"`
+	IVCheck     bool                     `json:"ivCheck"`
 }
 
 func (v *ShadowsocksServerConfig) Build() (proto.Message, error) {
@@ -50,6 +53,7 @@ func (v *ShadowsocksServerConfig) Build() (proto.Message, error) {
 			account := &shadowsocks.Account{
 				Password:   user.Password,
 				CipherType: cipherFromString(user.Cipher),
+				IvCheck:    v.IVCheck,
 			}
 			if account.Password == "" {
 				return nil, newError("Shadowsocks password is not specified.")
@@ -68,6 +72,7 @@ func (v *ShadowsocksServerConfig) Build() (proto.Message, error) {
 		account := &shadowsocks.Account{
 			Password:   v.Password,
 			CipherType: cipherFromString(v.Cipher),
+			IvCheck:    v.IVCheck,
 		}
 		if account.Password == "" {
 			return nil, newError("Shadowsocks password is not specified.")
@@ -92,6 +97,7 @@ type ShadowsocksServerTarget struct {
 	Password string   `json:"password"`
 	Email    string   `json:"email"`
 	Level    byte     `json:"level"`
+	IVCheck  bool     `json:"ivCheck"`
 }
 
 type ShadowsocksClientConfig struct {
@@ -124,6 +130,8 @@ func (v *ShadowsocksClientConfig) Build() (proto.Message, error) {
 			return nil, newError("unknown cipher method: ", server.Cipher)
 		}
 
+		account.IvCheck = server.IVCheck
+
 		ss := &protocol.ServerEndpoint{
 			Address: server.Address.Build(),
 			Port:    uint32(server.Port),

infra/conf/socks.go

@@ -2,6 +2,7 @@ package conf
 
 import (
 	"encoding/json"
+	"strings"
 
 	"github.com/golang/protobuf/proto"
 
@@ -73,11 +74,22 @@ type SocksRemoteConfig struct {
 
 type SocksClientConfig struct {
 	Servers []*SocksRemoteConfig `json:"servers"`
+	Version string               `json:"version"`
 }
 
 func (v *SocksClientConfig) Build() (proto.Message, error) {
 	config := new(socks.ClientConfig)
 	config.Server = make([]*protocol.ServerEndpoint, len(v.Servers))
+	switch strings.ToLower(v.Version) {
+	case "4":
+		config.Version = socks.Version_SOCKS4
+	case "4a":
+		config.Version = socks.Version_SOCKS4A
+	case "", "5":
+		config.Version = socks.Version_SOCKS5
+	default:
+		return nil, newError("failed to parse socks server version: ", v.Version).AtError()
+	}
 	for idx, serverConfig := range v.Servers {
 		server := &protocol.ServerEndpoint{
 			Address: serverConfig.Address.Build(),
@@ -92,6 +104,9 @@ func (v *SocksClientConfig) Build() (proto.Message, error) {
 			if err := json.Unmarshal(rawUser, account); err != nil {
 				return nil, newError("failed to parse socks account").Base(err).AtError()
 			}
+			if config.Version != socks.Version_SOCKS5 && account.Password != "" {
+				return nil, newError("password is only supported in socks5").AtError()
+			}
 			user.Account = serial.ToTypedMessage(account.Build())
 			server.User = append(server.User, user)
 		}

infra/conf/transport_internet.go

@@ -1,6 +1,7 @@
 package conf
 
 import (
+	"encoding/base64"
 	"encoding/json"
 	"math"
 	"net/url"
@@ -141,7 +142,6 @@ func (c *TCPConfig) Build() (proto.Message, error) {
 
 type WebSocketConfig struct {
 	Path                string            `json:"path"`
-	Path2               string            `json:"Path"` // The key was misspelled. For backward compatibility, we have to keep track the old key.
 	Headers             map[string]string `json:"headers"`
 	AcceptProxyProtocol bool              `json:"acceptProxyProtocol"`
 }
@@ -149,9 +149,6 @@ type WebSocketConfig struct {
 // Build implements Buildable.
 func (c *WebSocketConfig) Build() (proto.Message, error) {
 	path := c.Path
-	if path == "" && c.Path2 != "" {
-		path = c.Path2
-	}
 	header := make([]*websocket.Header, 0, 32)
 	for key, value := range c.Headers {
 		header = append(header, &websocket.Header{
@@ -342,18 +339,19 @@ func (c *TLSCertConfig) Build() (*tls.Certificate, error) {
 }
 
 type TLSConfig struct {
-	Insecure                 bool             `json:"allowInsecure"`
-	Certs                    []*TLSCertConfig `json:"certificates"`
-	ServerName               string           `json:"serverName"`
-	ALPN                     *StringList      `json:"alpn"`
-	EnableSessionResumption  bool             `json:"enableSessionResumption"`
-	DisableSystemRoot        bool             `json:"disableSystemRoot"`
-	MinVersion               string           `json:"minVersion"`
-	MaxVersion               string           `json:"maxVersion"`
-	CipherSuites             string           `json:"cipherSuites"`
-	PreferServerCipherSuites bool             `json:"preferServerCipherSuites"`
-	Fingerprint              string           `json:"fingerprint"`
-	RejectUnknownSNI         bool             `json:"rejectUnknownSni"`
+	Insecure                         bool             `json:"allowInsecure"`
+	Certs                            []*TLSCertConfig `json:"certificates"`
+	ServerName                       string           `json:"serverName"`
+	ALPN                             *StringList      `json:"alpn"`
+	EnableSessionResumption          bool             `json:"enableSessionResumption"`
+	DisableSystemRoot                bool             `json:"disableSystemRoot"`
+	MinVersion                       string           `json:"minVersion"`
+	MaxVersion                       string           `json:"maxVersion"`
+	CipherSuites                     string           `json:"cipherSuites"`
+	PreferServerCipherSuites         bool             `json:"preferServerCipherSuites"`
+	Fingerprint                      string           `json:"fingerprint"`
+	RejectUnknownSNI                 bool             `json:"rejectUnknownSni"`
+	PinnedPeerCertificateChainSha256 *[]string        `json:"pinnedPeerCertificateChainSha256"`
 }
 
 // Build implements Buildable.
@@ -383,6 +381,18 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 	config.PreferServerCipherSuites = c.PreferServerCipherSuites
 	config.Fingerprint = strings.ToLower(c.Fingerprint)
 	config.RejectUnknownSni = c.RejectUnknownSNI
+
+	if c.PinnedPeerCertificateChainSha256 != nil {
+		config.PinnedPeerCertificateChainSha256 = [][]byte{}
+		for _, v := range *c.PinnedPeerCertificateChainSha256 {
+			hashValue, err := base64.StdEncoding.DecodeString(v)
+			if err != nil {
+				return nil, err
+			}
+			config.PinnedPeerCertificateChainSha256 = append(config.PinnedPeerCertificateChainSha256, hashValue)
+		}
+	}
+
 	return config, nil
 }
 
@@ -436,17 +446,18 @@ func (c *XTLSCertConfig) Build() (*xtls.Certificate, error) {
 }
 
 type XTLSConfig struct {
-	Insecure                 bool              `json:"allowInsecure"`
-	Certs                    []*XTLSCertConfig `json:"certificates"`
-	ServerName               string            `json:"serverName"`
-	ALPN                     *StringList       `json:"alpn"`
-	EnableSessionResumption  bool              `json:"enableSessionResumption"`
-	DisableSystemRoot        bool              `json:"disableSystemRoot"`
-	MinVersion               string            `json:"minVersion"`
-	MaxVersion               string            `json:"maxVersion"`
-	CipherSuites             string            `json:"cipherSuites"`
-	PreferServerCipherSuites bool              `json:"preferServerCipherSuites"`
-	RejectUnknownSNI         bool              `json:"rejectUnknownSni"`
+	Insecure                         bool              `json:"allowInsecure"`
+	Certs                            []*XTLSCertConfig `json:"certificates"`
+	ServerName                       string            `json:"serverName"`
+	ALPN                             *StringList       `json:"alpn"`
+	EnableSessionResumption          bool              `json:"enableSessionResumption"`
+	DisableSystemRoot                bool              `json:"disableSystemRoot"`
+	MinVersion                       string            `json:"minVersion"`
+	MaxVersion                       string            `json:"maxVersion"`
+	CipherSuites                     string            `json:"cipherSuites"`
+	PreferServerCipherSuites         bool              `json:"preferServerCipherSuites"`
+	RejectUnknownSNI                 bool              `json:"rejectUnknownSni"`
+	PinnedPeerCertificateChainSha256 *[]string         `json:"pinnedPeerCertificateChainSha256"`
 }
 
 // Build implements Buildable.
@@ -475,6 +486,18 @@ func (c *XTLSConfig) Build() (proto.Message, error) {
 	config.CipherSuites = c.CipherSuites
 	config.PreferServerCipherSuites = c.PreferServerCipherSuites
 	config.RejectUnknownSni = c.RejectUnknownSNI
+
+	if c.PinnedPeerCertificateChainSha256 != nil {
+		config.PinnedPeerCertificateChainSha256 = [][]byte{}
+		for _, v := range *c.PinnedPeerCertificateChainSha256 {
+			hashValue, err := base64.StdEncoding.DecodeString(v)
+			if err != nil {
+				return nil, err
+			}
+			config.PinnedPeerCertificateChainSha256 = append(config.PinnedPeerCertificateChainSha256, hashValue)
+		}
+	}
+
 	return config, nil
 }
 
@@ -503,14 +526,13 @@ func (p TransportProtocol) Build() (string, error) {
 }
 
 type SocketConfig struct {
-	Mark                int32       `json:"mark"`
-	TFO                 interface{} `json:"tcpFastOpen"`
-	TProxy              string      `json:"tproxy"`
-	AcceptProxyProtocol bool        `json:"acceptProxyProtocol"`
-	DomainStrategy      string      `json:"domainStrategy"`
-	DialerProxy         string      `json:"dialerProxy"`
-
-	TCPKeepAliveInterval int32 `json:"tcpKeepAliveInterval"`
+	Mark                 int32       `json:"mark"`
+	TFO                  interface{} `json:"tcpFastOpen"`
+	TProxy               string      `json:"tproxy"`
+	AcceptProxyProtocol  bool        `json:"acceptProxyProtocol"`
+	DomainStrategy       string      `json:"domainStrategy"`
+	DialerProxy          string      `json:"dialerProxy"`
+	TCPKeepAliveInterval int32       `json:"tcpKeepAliveInterval"`
 }
 
 // Build implements Buildable.

infra/conf/vmess.go

@@ -15,9 +15,10 @@ import (
 )
 
 type VMessAccount struct {
-	ID       string `json:"id"`
-	AlterIds uint16 `json:"alterId"`
-	Security string `json:"security"`
+	ID          string `json:"id"`
+	AlterIds    uint16 `json:"alterId"`
+	Security    string `json:"security"`
+	Experiments string `json:"experiments"`
 }
 
 // Build implements Buildable
@@ -43,6 +44,7 @@ func (a *VMessAccount) Build() *vmess.Account {
 		SecuritySettings: &protocol.SecurityConfig{
 			Type: st,
 		},
+		TestsEnabled: a.Experiments,
 	}
 }
 

infra/conf/xray.go

@@ -6,12 +6,12 @@ import (
 	"os"
 	"strings"
 
-	"github.com/xtls/xray-core/transport/internet"
-
 	"github.com/xtls/xray-core/app/dispatcher"
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/app/stats"
 	"github.com/xtls/xray-core/common/serial"
+	"github.com/xtls/xray-core/transport/internet"
+
 	core "github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/transport/internet/xtls"
 )
@@ -30,6 +30,7 @@ var (
 
 	outboundConfigLoader = NewJSONConfigLoader(ConfigCreatorCache{
 		"blackhole":   func() interface{} { return new(BlackholeConfig) },
+		"loopback":    func() interface{} { return new(LoopbackConfig) },
 		"freedom":     func() interface{} { return new(FreedomConfig) },
 		"http":        func() interface{} { return new(HTTPClientConfig) },
 		"shadowsocks": func() interface{} { return new(ShadowsocksClientConfig) },
@@ -64,6 +65,7 @@ type SniffingConfig struct {
 	DestOverride    *StringList `json:"destOverride"`
 	DomainsExcluded *StringList `json:"domainsExcluded"`
 	MetadataOnly    bool        `json:"metadataOnly"`
+	RouteOnly       bool        `json:"routeOnly"`
 }
 
 // Build implements Buildable.
@@ -98,6 +100,7 @@ func (c *SniffingConfig) Build() (*proxyman.SniffingConfig, error) {
 		DestinationOverride: p,
 		DomainsExcluded:     d,
 		MetadataOnly:        c.MetadataOnly,
+		RouteOnly:           c.RouteOnly,
 	}, nil
 }
 
@@ -266,13 +269,14 @@ func (c *InboundDetourConfig) Build() (*core.InboundHandlerConfig, error) {
 }
 
 type OutboundDetourConfig struct {
-	Protocol      string           `json:"protocol"`
-	SendThrough   *Address         `json:"sendThrough"`
-	Tag           string           `json:"tag"`
-	Settings      *json.RawMessage `json:"settings"`
-	StreamSetting *StreamConfig    `json:"streamSettings"`
-	ProxySettings *ProxyConfig     `json:"proxySettings"`
-	MuxSettings   *MuxConfig       `json:"mux"`
+	Protocol       string           `json:"protocol"`
+	SendThrough    *Address         `json:"sendThrough"`
+	Tag            string           `json:"tag"`
+	Settings       *json.RawMessage `json:"settings"`
+	StreamSetting  *StreamConfig    `json:"streamSettings"`
+	ProxySettings  *ProxyConfig     `json:"proxySettings"`
+	MuxSettings    *MuxConfig       `json:"mux"`
+	DomainStrategy string           `json:"domainStrategy"`
 }
 
 func (c *OutboundDetourConfig) checkChainProxyConfig() error {
@@ -292,6 +296,21 @@ func (c *OutboundDetourConfig) Build() (*core.OutboundHandlerConfig, error) {
 		return nil, err
 	}
 
+	switch c.DomainStrategy {
+	case "UseIP":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_USE_IP
+	case "UseIPv4":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_USE_IP4
+	case "UseIPv6":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_USE_IP6
+	case "PreferIPv4":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_PREFER_IP4
+	case "PreferIPv6":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_PREFER_IP6
+	default:
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_AS_IS
+	}
+
 	if c.SendThrough != nil {
 		address := c.SendThrough
 		if address.Family().IsDomain() {
@@ -403,6 +422,7 @@ type Config struct {
 	Stats           *StatsConfig           `json:"stats"`
 	Reverse         *ReverseConfig         `json:"reverse"`
 	FakeDNS         *FakeDNSConfig         `json:"fakeDns"`
+	Observatory     *ObservatoryConfig     `json:"observatory"`
 }
 
 func (c *Config) findInboundTag(tag string) int {
@@ -609,6 +629,14 @@ func (c *Config) Build() (*core.Config, error) {
 		config.App = append(config.App, serial.ToTypedMessage(r))
 	}
 
+	if c.Observatory != nil {
+		r, err := c.Observatory.Build()
+		if err != nil {
+			return nil, err
+		}
+		config.App = append(config.App, serial.ToTypedMessage(r))
+	}
+
 	var inbounds []InboundDetourConfig
 
 	if c.InboundConfig != nil {

main/commands/all/tls/certchainhash.go

@@ -0,0 +1,41 @@
+package tls
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+
+	"github.com/xtls/xray-core/main/commands/base"
+	"github.com/xtls/xray-core/transport/internet/tls"
+)
+
+var cmdCertChainHash = &base.Command{
+	UsageLine: "{{.Exec}} certChainHash",
+	Short:     "Calculate TLS certificates hash.",
+	Long: `
+	xray tls certChainHash --cert <cert.pem>
+	Calculate TLS certificate chain hash.
+	`,
+}
+
+func init() {
+	cmdCertChainHash.Run = executeCertChainHash // break init loop
+}
+
+var input = cmdCertChainHash.Flag.String("cert", "fullchain.pem", "The file path of the certificates chain")
+
+func executeCertChainHash(cmd *base.Command, args []string) {
+	fs := flag.NewFlagSet("certChainHash", flag.ContinueOnError)
+	if err := fs.Parse(args); err != nil {
+		fmt.Println(err)
+		return
+	}
+	certContent, err := ioutil.ReadFile(*input)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	certChainHashB64 := tls.CalculatePEMCertChainSHA256Hash(certContent)
+	fmt.Println(certChainHashB64)
+	return
+}

main/commands/all/tls/ping.go

@@ -1,12 +1,14 @@
 package tls
 
 import (
-	"crypto/tls"
+	gotls "crypto/tls"
 	"crypto/x509"
+	"encoding/base64"
 	"fmt"
 	"net"
 
 	"github.com/xtls/xray-core/main/commands/base"
+	. "github.com/xtls/xray-core/transport/internet/tls"
 )
 
 // cmdPing is the tls ping command
@@ -60,11 +62,13 @@ func executePing(cmd *base.Command, args []string) {
 		if err != nil {
 			base.Fatalf("Failed to dial tcp: %s", err)
 		}
-		tlsConn := tls.Client(tcpConn, &tls.Config{
+		tlsConn := gotls.Client(tcpConn, &gotls.Config{
 			InsecureSkipVerify: true,
 			NextProtos:         []string{"http/1.1"},
-			MaxVersion:         tls.VersionTLS12,
-			MinVersion:         tls.VersionTLS12,
+			MaxVersion:         gotls.VersionTLS12,
+			MinVersion:         gotls.VersionTLS12,
+			// Do not release tool before v5's refactor
+			// VerifyPeerCertificate: showCert(),
 		})
 		err = tlsConn.Handshake()
 		if err != nil {
@@ -83,11 +87,13 @@ func executePing(cmd *base.Command, args []string) {
 		if err != nil {
 			base.Fatalf("Failed to dial tcp: %s", err)
 		}
-		tlsConn := tls.Client(tcpConn, &tls.Config{
+		tlsConn := gotls.Client(tcpConn, &gotls.Config{
 			ServerName: domain,
 			NextProtos: []string{"http/1.1"},
-			MaxVersion: tls.VersionTLS12,
-			MinVersion: tls.VersionTLS12,
+			MaxVersion: gotls.VersionTLS12,
+			MinVersion: gotls.VersionTLS12,
+			// Do not release tool before v5's refactor
+			// VerifyPeerCertificate: showCert(),
 		})
 		err = tlsConn.Handshake()
 		if err != nil {
@@ -110,3 +116,11 @@ func printCertificates(certs []*x509.Certificate) {
 		fmt.Println("Allowed domains: ", cert.DNSNames)
 	}
 }
+
+func showCert() func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
+	return func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
+		hash := GenerateCertChainHash(rawCerts)
+		fmt.Println("Certificate Chain Hash: ", base64.StdEncoding.EncodeToString(hash))
+		return nil
+	}
+}

main/commands/all/tls/tls.go

@@ -13,5 +13,6 @@ var CmdTLS = &base.Command{
 	Commands: []*base.Command{
 		cmdCert,
 		cmdPing,
+		cmdCertChainHash,
 	},
 }

main/distro/all/all.go

@@ -9,10 +9,10 @@ import (
 	_ "github.com/xtls/xray-core/app/proxyman/outbound"
 
 	// Default commander and all its services. This is an optional feature.
-	_ "github.com/xtls/xray-core/app/commander"
-	_ "github.com/xtls/xray-core/app/log/command"
-	_ "github.com/xtls/xray-core/app/proxyman/command"
-	_ "github.com/xtls/xray-core/app/stats/command"
+	//_ "github.com/xtls/xray-core/app/commander"
+	//_ "github.com/xtls/xray-core/app/log/command"
+	//_ "github.com/xtls/xray-core/app/proxyman/command"
+	//_ "github.com/xtls/xray-core/app/stats/command"
 
 	// Other optional features.
 	_ "github.com/xtls/xray-core/app/dns"
@@ -23,13 +23,17 @@ import (
 	_ "github.com/xtls/xray-core/app/router"
 	_ "github.com/xtls/xray-core/app/stats"
 
+	// Fix dependency cycle caused by core import in internet package
+	_ "github.com/xtls/xray-core/transport/internet/tagged/taggedimpl"
+
 	// Inbound and outbound proxies.
 	_ "github.com/xtls/xray-core/proxy/blackhole"
 	_ "github.com/xtls/xray-core/proxy/dns"
 	_ "github.com/xtls/xray-core/proxy/dokodemo"
 	_ "github.com/xtls/xray-core/proxy/freedom"
 	_ "github.com/xtls/xray-core/proxy/http"
-	_ "github.com/xtls/xray-core/proxy/mtproto"
+	_ "github.com/xtls/xray-core/proxy/loopback"
+	//_ "github.com/xtls/xray-core/proxy/mtproto"
 	_ "github.com/xtls/xray-core/proxy/shadowsocks"
 	_ "github.com/xtls/xray-core/proxy/socks"
 	_ "github.com/xtls/xray-core/proxy/trojan"
@@ -59,14 +63,9 @@ import (
 	_ "github.com/xtls/xray-core/transport/internet/headers/wechat"
 	_ "github.com/xtls/xray-core/transport/internet/headers/wireguard"
 
-	// JSON & TOML & YAML
 	_ "github.com/xtls/xray-core/main/json"
-	_ "github.com/xtls/xray-core/main/toml"
-	_ "github.com/xtls/xray-core/main/yaml"
-
 	// Load config from file or http(s)
-	_ "github.com/xtls/xray-core/main/confloader/external"
-
+	//_ "github.com/xtls/xray-core/main/confloader/external"
 	// Commands
-	_ "github.com/xtls/xray-core/main/commands/all"
+	//_ "github.com/xtls/xray-core/main/commands/all"
 )

main/toml/toml.go

@@ -1,48 +0,0 @@
-package toml
-
-import (
-	"io"
-
-	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/cmdarg"
-	"github.com/xtls/xray-core/core"
-	"github.com/xtls/xray-core/infra/conf"
-	"github.com/xtls/xray-core/infra/conf/serial"
-	"github.com/xtls/xray-core/main/confloader"
-)
-
-func init() {
-	common.Must(core.RegisterConfigLoader(&core.ConfigFormat{
-		Name:      "TOML",
-		Extension: []string{"toml"},
-		Loader: func(input interface{}) (*core.Config, error) {
-			switch v := input.(type) {
-			case cmdarg.Arg:
-				cf := &conf.Config{}
-				for i, arg := range v {
-					newError("Reading config: ", arg).AtInfo().WriteToLog()
-					r, err := confloader.LoadConfig(arg)
-					if err != nil {
-						return nil, newError("failed to read config: ", arg).Base(err)
-					}
-					c, err := serial.DecodeTOMLConfig(r)
-					if err != nil {
-						return nil, newError("failed to decode config: ", arg).Base(err)
-					}
-					if i == 0 {
-						// This ensure even if the muti-json parser do not support a setting,
-						// It is still respected automatically for the first configure file
-						*cf = *c
-						continue
-					}
-					cf.Override(c, arg)
-				}
-				return cf.Build()
-			case io.Reader:
-				return serial.LoadTOMLConfig(v)
-			default:
-				return nil, newError("unknow type")
-			}
-		},
-	}))
-}

main/yaml/yaml.go

@@ -1,48 +0,0 @@
-package yaml
-
-import (
-	"io"
-
-	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/cmdarg"
-	"github.com/xtls/xray-core/core"
-	"github.com/xtls/xray-core/infra/conf"
-	"github.com/xtls/xray-core/infra/conf/serial"
-	"github.com/xtls/xray-core/main/confloader"
-)
-
-func init() {
-	common.Must(core.RegisterConfigLoader(&core.ConfigFormat{
-		Name:      "YAML",
-		Extension: []string{"yaml", "yml"},
-		Loader: func(input interface{}) (*core.Config, error) {
-			switch v := input.(type) {
-			case cmdarg.Arg:
-				cf := &conf.Config{}
-				for i, arg := range v {
-					newError("Reading config: ", arg).AtInfo().WriteToLog()
-					r, err := confloader.LoadConfig(arg)
-					if err != nil {
-						return nil, newError("failed to read config: ", arg).Base(err)
-					}
-					c, err := serial.DecodeYAMLConfig(r)
-					if err != nil {
-						return nil, newError("failed to decode config: ", arg).Base(err)
-					}
-					if i == 0 {
-						// This ensure even if the muti-json parser do not support a setting,
-						// It is still respected automatically for the first configure file
-						*cf = *c
-						continue
-					}
-					cf.Override(c, arg)
-				}
-				return cf.Build()
-			case io.Reader:
-				return serial.LoadYAMLConfig(v)
-			default:
-				return nil, newError("unknow type")
-			}
-		},
-	}))
-}

proxy/dns/dns.go

@@ -96,6 +96,12 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 		return newError("invalid outbound")
 	}
 
+	fakeDNS := true
+	inbound := session.InboundFromContext(ctx)
+	if inbound != nil && inbound.SkipFakeDNS {
+		fakeDNS = false
+	}
+
 	srcNetwork := outbound.Target.Network
 
 	dest := outbound.Target
@@ -171,7 +177,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 			if !h.isOwnLink(ctx) {
 				isIPQuery, domain, id, qType := parseIPQuery(b.Bytes())
 				if isIPQuery {
-					go h.handleIPQuery(id, qType, domain, writer)
+					go h.handleIPQuery(id, qType, domain, writer, fakeDNS)
 					continue
 				}
 			}
@@ -208,7 +214,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 	return nil
 }
 
-func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string, writer dns_proto.MessageWriter) {
+func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string, writer dns_proto.MessageWriter, fakedns bool) {
 	var ips []net.IP
 	var err error
 
@@ -219,13 +225,13 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 		ips, err = h.client.LookupIP(domain, dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: false,
-			FakeEnable: true,
+			FakeEnable: fakedns,
 		})
 	case dnsmessage.TypeAAAA:
 		ips, err = h.client.LookupIP(domain, dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
-			FakeEnable: true,
+			FakeEnable: fakedns,
 		})
 	}
 

proxy/loopback/config.go

@@ -0,0 +1,3 @@
+package loopback
+
+//go:generate go run github.com/xtls/xray-core/common/errors/errorgen

proxy/loopback/config.pb.go

@@ -0,0 +1,149 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
+// source: proxy/loopback/config.proto
+
+package loopback
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	InboundTag string `protobuf:"bytes,1,opt,name=inbound_tag,json=inboundTag,proto3" json:"inbound_tag,omitempty"`
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proxy_loopback_config_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_proxy_loopback_config_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_proxy_loopback_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetInboundTag() string {
+	if x != nil {
+		return x.InboundTag
+	}
+	return ""
+}
+
+var File_proxy_loopback_config_proto protoreflect.FileDescriptor
+
+var file_proxy_loopback_config_proto_rawDesc = []byte{
+	0x0a, 0x1b, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x6c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b,
+	0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x19, 0x76,
+	0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e,
+	0x6c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b, 0x22, 0x29, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
+	0x69, 0x67, 0x12, 0x1f, 0x0a, 0x0b, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x5f, 0x74, 0x61,
+	0x67, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0a, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64,
+	0x54, 0x61, 0x67, 0x42, 0x5b, 0x0a, 0x17, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e,
+	0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x6c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b, 0x50, 0x01,
+	0x5a, 0x28, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c,
+	0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78,
+	0x79, 0x2f, 0x6c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b, 0xaa, 0x02, 0x13, 0x58, 0x72, 0x61,
+	0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x4c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_proxy_loopback_config_proto_rawDescOnce sync.Once
+	file_proxy_loopback_config_proto_rawDescData = file_proxy_loopback_config_proto_rawDesc
+)
+
+func file_proxy_loopback_config_proto_rawDescGZIP() []byte {
+	file_proxy_loopback_config_proto_rawDescOnce.Do(func() {
+		file_proxy_loopback_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_proxy_loopback_config_proto_rawDescData)
+	})
+	return file_proxy_loopback_config_proto_rawDescData
+}
+
+var file_proxy_loopback_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_proxy_loopback_config_proto_goTypes = []interface{}{
+	(*Config)(nil), // 0: v2ray.core.proxy.loopback.Config
+}
+var file_proxy_loopback_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
+}
+
+func init() { file_proxy_loopback_config_proto_init() }
+func file_proxy_loopback_config_proto_init() {
+	if File_proxy_loopback_config_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_proxy_loopback_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Config); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proxy_loopback_config_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_proxy_loopback_config_proto_goTypes,
+		DependencyIndexes: file_proxy_loopback_config_proto_depIdxs,
+		MessageInfos:      file_proxy_loopback_config_proto_msgTypes,
+	}.Build()
+	File_proxy_loopback_config_proto = out.File
+	file_proxy_loopback_config_proto_rawDesc = nil
+	file_proxy_loopback_config_proto_goTypes = nil
+	file_proxy_loopback_config_proto_depIdxs = nil
+}

proxy/loopback/config.proto

@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package v2ray.core.proxy.loopback;
+option csharp_namespace = "Xray.Proxy.Loopback";
+option go_package = "github.com/xtls/xray-core/proxy/loopback";
+option java_package = "com.xray.proxy.loopback";
+option java_multiple_files = true;
+
+message Config {
+  string inbound_tag = 1;
+}

proxy/loopback/errors.generated.go

@@ -1,4 +1,4 @@
-package toml
+package loopback
 
 import "github.com/xtls/xray-core/common/errors"
 

proxy/loopback/loopback.go

@@ -0,0 +1,121 @@
+package loopback
+
+import (
+	"context"
+	"github.com/xtls/xray-core/common/net/cnc"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/retry"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/task"
+	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport"
+	"github.com/xtls/xray-core/transport/internet"
+)
+
+type Loopback struct {
+	config             *Config
+	dispatcherInstance routing.Dispatcher
+}
+
+func (l *Loopback) Process(ctx context.Context, link *transport.Link, _ internet.Dialer) error {
+	outbound := session.OutboundFromContext(ctx)
+	if outbound == nil || !outbound.Target.IsValid() {
+		return newError("target not specified.")
+	}
+	destination := outbound.Target
+
+	newError("opening connection to ", destination).WriteToLog(session.ExportIDToError(ctx))
+
+	input := link.Reader
+	output := link.Writer
+
+	var conn net.Conn
+	err := retry.ExponentialBackoff(2, 100).On(func() error {
+		dialDest := destination
+
+		content := new(session.Content)
+		content.SkipDNSResolve = true
+
+		ctx = session.ContextWithContent(ctx, content)
+
+		inbound := session.InboundFromContext(ctx)
+
+		inbound.Tag = l.config.InboundTag
+
+		ctx = session.ContextWithInbound(ctx, inbound)
+
+		rawConn, err := l.dispatcherInstance.Dispatch(ctx, dialDest)
+		if err != nil {
+			return err
+		}
+
+		var readerOpt cnc.ConnectionOption
+		if dialDest.Network == net.Network_TCP {
+			readerOpt = cnc.ConnectionOutputMulti(rawConn.Reader)
+		} else {
+			readerOpt = cnc.ConnectionOutputMultiUDP(rawConn.Reader)
+		}
+
+		conn = cnc.NewConnection(cnc.ConnectionInputMulti(rawConn.Writer), readerOpt)
+		return nil
+	})
+	if err != nil {
+		return newError("failed to open connection to ", destination).Base(err)
+	}
+	defer conn.Close()
+
+	requestDone := func() error {
+		var writer buf.Writer
+		if destination.Network == net.Network_TCP {
+			writer = buf.NewWriter(conn)
+		} else {
+			writer = &buf.SequentialWriter{Writer: conn}
+		}
+
+		if err := buf.Copy(input, writer); err != nil {
+			return newError("failed to process request").Base(err)
+		}
+
+		return nil
+	}
+
+	responseDone := func() error {
+		var reader buf.Reader
+		if destination.Network == net.Network_TCP {
+			reader = buf.NewReader(conn)
+		} else {
+			reader = buf.NewPacketReader(conn)
+		}
+		if err := buf.Copy(reader, output); err != nil {
+			return newError("failed to process response").Base(err)
+		}
+
+		return nil
+	}
+
+	if err := task.Run(ctx, requestDone, task.OnSuccess(responseDone, task.Close(output))); err != nil {
+		return newError("connection ends").Base(err)
+	}
+
+	return nil
+}
+
+func (l *Loopback) init(config *Config, dispatcherInstance routing.Dispatcher) error {
+	l.dispatcherInstance = dispatcherInstance
+	l.config = config
+	return nil
+}
+
+func init() {
+	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
+		l := new(Loopback)
+		err := core.RequireFeatures(ctx, func(dispatcherInstance routing.Dispatcher) error {
+			return l.init(config.(*Config), dispatcherInstance)
+		})
+		return l, err
+	}))
+}

proxy/shadowsocks/config.go

@@ -14,6 +14,7 @@ import (
 	"golang.org/x/crypto/hkdf"
 
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/antireplay"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/crypto"
 	"github.com/xtls/xray-core/common/protocol"
@@ -23,6 +24,8 @@ import (
 type MemoryAccount struct {
 	Cipher Cipher
 	Key    []byte
+
+	replayFilter antireplay.GeneralizedReplayFilter
 }
 
 // Equals implements protocol.Account.Equals().
@@ -33,6 +36,16 @@ func (a *MemoryAccount) Equals(another protocol.Account) bool {
 	return false
 }
 
+func (a *MemoryAccount) CheckIV(iv []byte) error {
+	if a.replayFilter == nil {
+		return nil
+	}
+	if a.replayFilter.Check(iv) {
+		return nil
+	}
+	return newError("IV is not unique")
+}
+
 func (a *MemoryAccount) GetCipherName() string {
 	switch a.Cipher.(type) {
 	case *AEADCipher:
@@ -64,6 +77,12 @@ func createChaCha20Poly1305(key []byte) cipher.AEAD {
 	return ChaChaPoly1305
 }
 
+func createXChaCha20Poly1305(key []byte) cipher.AEAD {
+	XChaChaPoly1305, err := chacha20poly1305.NewX(key)
+	common.Must(err)
+	return XChaChaPoly1305
+}
+
 func (a *Account) getCipher() (Cipher, error) {
 	switch a.CipherType {
 	case CipherType_AES_128_GCM:
@@ -84,6 +103,12 @@ func (a *Account) getCipher() (Cipher, error) {
 			IVBytes:         32,
 			AEADAuthCreator: createChaCha20Poly1305,
 		}, nil
+	case CipherType_XCHACHA20_POLY1305:
+		return &AEADCipher{
+			KeyBytes:        32,
+			IVBytes:         32,
+			AEADAuthCreator: createXChaCha20Poly1305,
+		}, nil
 	case CipherType_NONE:
 		return NoneCipher{}, nil
 	default:
@@ -100,6 +125,12 @@ func (a *Account) AsAccount() (protocol.Account, error) {
 	return &MemoryAccount{
 		Cipher: Cipher,
 		Key:    passwordToCipherKey([]byte(a.Password), Cipher.KeySize()),
+		replayFilter: func() antireplay.GeneralizedReplayFilter {
+			if a.IvCheck {
+				return antireplay.NewBloomRing()
+			}
+			return nil
+		}(),
 	}, nil
 }
 
@@ -133,11 +164,12 @@ func (c *AEADCipher) IVSize() int32 {
 }
 
 func (c *AEADCipher) createAuthenticator(key []byte, iv []byte) *crypto.AEADAuthenticator {
-	nonce := crypto.GenerateInitialAEADNonce()
 	subkey := make([]byte, c.KeyBytes)
 	hkdfSHA1(key, iv, subkey)
+	aead := c.AEADAuthCreator(subkey)
+	nonce := crypto.GenerateAEADNonceWithSize(aead.NonceSize())
 	return &crypto.AEADAuthenticator{
-		AEAD:           c.AEADAuthCreator(subkey),
+		AEAD:           aead,
 		NonceGenerator: nonce,
 	}
 }

proxy/shadowsocks/config.pb.go

@@ -25,11 +25,12 @@ const (
 type CipherType int32
 
 const (
-	CipherType_UNKNOWN           CipherType = 0
-	CipherType_AES_128_GCM       CipherType = 5
-	CipherType_AES_256_GCM       CipherType = 6
-	CipherType_CHACHA20_POLY1305 CipherType = 7
-	CipherType_NONE              CipherType = 8
+	CipherType_UNKNOWN            CipherType = 0
+	CipherType_AES_128_GCM        CipherType = 5
+	CipherType_AES_256_GCM        CipherType = 6
+	CipherType_CHACHA20_POLY1305  CipherType = 7
+	CipherType_XCHACHA20_POLY1305 CipherType = 8
+	CipherType_NONE               CipherType = 9
 )
 
 // Enum value maps for CipherType.
@@ -39,14 +40,16 @@ var (
 		5: "AES_128_GCM",
 		6: "AES_256_GCM",
 		7: "CHACHA20_POLY1305",
-		8: "NONE",
+		8: "XCHACHA20_POLY1305",
+		9: "NONE",
 	}
 	CipherType_value = map[string]int32{
-		"UNKNOWN":           0,
-		"AES_128_GCM":       5,
-		"AES_256_GCM":       6,
-		"CHACHA20_POLY1305": 7,
-		"NONE":              8,
+		"UNKNOWN":            0,
+		"AES_128_GCM":        5,
+		"AES_256_GCM":        6,
+		"CHACHA20_POLY1305":  7,
+		"XCHACHA20_POLY1305": 8,
+		"NONE":               9,
 	}
 )
 
@@ -84,6 +87,7 @@ type Account struct {
 
 	Password   string     `protobuf:"bytes,1,opt,name=password,proto3" json:"password,omitempty"`
 	CipherType CipherType `protobuf:"varint,2,opt,name=cipher_type,json=cipherType,proto3,enum=xray.proxy.shadowsocks.CipherType" json:"cipher_type,omitempty"`
+	IvCheck    bool       `protobuf:"varint,3,opt,name=iv_check,json=ivCheck,proto3" json:"iv_check,omitempty"`
 }
 
 func (x *Account) Reset() {
@@ -132,6 +136,13 @@ func (x *Account) GetCipherType() CipherType {
 	return CipherType_UNKNOWN
 }
 
+func (x *Account) GetIvCheck() bool {
+	if x != nil {
+		return x.IvCheck
+	}
+	return false
+}
+
 type ServerConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -246,38 +257,42 @@ var file_proxy_shadowsocks_config_proto_rawDesc = []byte{
 	0x63, 0x6f, 0x6c, 0x2f, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x21,
 	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2f,
 	0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x2e, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x22, 0x6a, 0x0a, 0x07, 0x41, 0x63, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x12, 0x1a, 0x0a, 0x08,
-	0x70, 0x61, 0x73, 0x73, 0x77, 0x6f, 0x72, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08,
-	0x70, 0x61, 0x73, 0x73, 0x77, 0x6f, 0x72, 0x64, 0x12, 0x43, 0x0a, 0x0b, 0x63, 0x69, 0x70, 0x68,
-	0x65, 0x72, 0x5f, 0x74, 0x79, 0x70, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x22, 0x2e,
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+	0xaa, 0x02, 0x16, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x53, 0x68,
+	0x61, 0x64, 0x6f, 0x77, 0x73, 0x6f, 0x63, 0x6b, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
 }
 
 var (

proxy/shadowsocks/config.proto

@@ -13,6 +13,8 @@ import "common/protocol/server_spec.proto";
 message Account {
   string password = 1;
   CipherType cipher_type = 2;
+
+  bool iv_check = 3;
 }
 
 enum CipherType {
@@ -20,7 +22,8 @@ enum CipherType {
   AES_128_GCM = 5;
   AES_256_GCM = 6;
   CHACHA20_POLY1305 = 7;
-  NONE = 8;
+  XCHACHA20_POLY1305 = 8;
+  NONE = 9;
 }
 
 message ServerConfig {

proxy/shadowsocks/protocol.go

@@ -71,6 +71,7 @@ func ReadTCPSession(validator *Validator, reader io.Reader) (*protocol.RequestHe
 
 	var user *protocol.MemoryUser
 	var ivLen int32
+	var iv []byte
 	var err error
 
 	count := validator.Count()
@@ -91,6 +92,9 @@ func ReadTCPSession(validator *Validator, reader io.Reader) (*protocol.RequestHe
 		user, aead, _, ivLen, err = validator.Get(bs, protocol.RequestCommandTCP)
 
 		if user != nil {
+			if ivLen > 0 {
+				iv = append([]byte(nil), bs[:ivLen]...)
+			}
 			reader = &FullReader{reader, bs[ivLen:]}
 			auth := &crypto.AEADAuthenticator{
 				AEAD:           aead,
@@ -108,7 +112,6 @@ func ReadTCPSession(validator *Validator, reader io.Reader) (*protocol.RequestHe
 		user, ivLen = validator.GetOnlyUser()
 		account := user.Account.(*MemoryAccount)
 		hashkdf.Write(account.Key)
-		var iv []byte
 		if ivLen > 0 {
 			if _, err := buffer.ReadFullFrom(reader, ivLen); err != nil {
 				readSizeRemain -= int(buffer.Len())
@@ -154,6 +157,13 @@ func ReadTCPSession(validator *Validator, reader io.Reader) (*protocol.RequestHe
 		return nil, nil, newError("invalid remote address.")
 	}
 
+	account := user.Account.(*MemoryAccount)
+	if ivError := account.CheckIV(iv); ivError != nil {
+		readSizeRemain -= int(buffer.Len())
+		DrainConnN(reader, readSizeRemain)
+		return nil, nil, newError("failed iv check").Base(ivError)
+	}
+
 	return request, br, nil
 }
 
@@ -171,6 +181,9 @@ func WriteTCPRequest(request *protocol.RequestHeader, writer io.Writer) (buf.Wri
 	if account.Cipher.IVSize() > 0 {
 		iv = make([]byte, account.Cipher.IVSize())
 		common.Must2(rand.Read(iv))
+		if ivError := account.CheckIV(iv); ivError != nil {
+			return nil, newError("failed to mark outgoing iv").Base(ivError)
+		}
 		if err := buf.WriteAllBytes(writer, iv, nil); err != nil {
 			return nil, newError("failed to write IV")
 		}
@@ -205,6 +218,10 @@ func ReadTCPResponse(user *protocol.MemoryUser, reader io.Reader) (buf.Reader, e
 		}
 	}
 
+	if ivError := account.CheckIV(iv); ivError != nil {
+		return nil, newError("failed iv check").Base(ivError)
+	}
+
 	return account.Cipher.NewDecryptionReader(account.Key, iv, reader)
 }
 
@@ -216,6 +233,9 @@ func WriteTCPResponse(request *protocol.RequestHeader, writer io.Writer) (buf.Wr
 	if account.Cipher.IVSize() > 0 {
 		iv = make([]byte, account.Cipher.IVSize())
 		common.Must2(rand.Read(iv))
+		if ivError := account.CheckIV(iv); ivError != nil {
+			return nil, newError("failed to mark outgoing iv").Base(ivError)
+		}
 		if err := buf.WriteAllBytes(writer, iv, nil); err != nil {
 			return nil, newError("failed to write IV.").Base(err)
 		}

proxy/socks/client.go

@@ -15,6 +15,7 @@ import (
 	"github.com/xtls/xray-core/common/signal"
 	"github.com/xtls/xray-core/common/task"
 	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
@@ -24,6 +25,8 @@ import (
 type Client struct {
 	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
+	version       Version
+	dns           dns.Client
 }
 
 // NewClient create a new Socks5 client based on the given config.
@@ -41,10 +44,16 @@ func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
 	}
 
 	v := core.MustFromContext(ctx)
-	return &Client{
+	c := &Client{
 		serverPicker:  protocol.NewRoundRobinServerPicker(serverList),
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
-	}, nil
+		version:       config.Version,
+	}
+	if config.Version == Version_SOCKS4 {
+		c.dns = v.GetFeature(dns.ClientType()).(dns.Client)
+	}
+
+	return c, nil
 }
 
 // Process implements proxy.Outbound.Process.
@@ -91,6 +100,31 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 		Address: destination.Address,
 		Port:    destination.Port,
 	}
+
+	switch c.version {
+	case Version_SOCKS4:
+		if request.Address.Family().IsDomain() {
+			ips, err := c.dns.LookupIP(request.Address.Domain(), dns.IPOption{
+				IPv4Enable: true,
+			})
+			if err != nil {
+				return err
+			} else if len(ips) == 0 {
+				return dns.ErrEmptyResponse
+			}
+			request.Address = net.IPAddress(ips[0])
+		}
+		fallthrough
+	case Version_SOCKS4A:
+		request.Version = socks4Version
+
+		if destination.Network == net.Network_UDP {
+			return newError("udp is not supported in socks4")
+		} else if destination.Address.Family().IsIPv6() {
+			return newError("ipv6 is not supported in socks4")
+		}
+	}
+
 	if destination.Network == net.Network_UDP {
 		request.Command = protocol.RequestCommandUDP
 	}

proxy/socks/config.pb.go

@@ -71,6 +71,55 @@ func (AuthType) EnumDescriptor() ([]byte, []int) {
 	return file_proxy_socks_config_proto_rawDescGZIP(), []int{0}
 }
 
+type Version int32
+
+const (
+	Version_SOCKS5  Version = 0
+	Version_SOCKS4  Version = 1
+	Version_SOCKS4A Version = 2
+)
+
+// Enum value maps for Version.
+var (
+	Version_name = map[int32]string{
+		0: "SOCKS5",
+		1: "SOCKS4",
+		2: "SOCKS4A",
+	}
+	Version_value = map[string]int32{
+		"SOCKS5":  0,
+		"SOCKS4":  1,
+		"SOCKS4A": 2,
+	}
+)
+
+func (x Version) Enum() *Version {
+	p := new(Version)
+	*p = x
+	return p
+}
+
+func (x Version) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Version) Descriptor() protoreflect.EnumDescriptor {
+	return file_proxy_socks_config_proto_enumTypes[1].Descriptor()
+}
+
+func (Version) Type() protoreflect.EnumType {
+	return &file_proxy_socks_config_proto_enumTypes[1]
+}
+
+func (x Version) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Version.Descriptor instead.
+func (Version) EnumDescriptor() ([]byte, []int) {
+	return file_proxy_socks_config_proto_rawDescGZIP(), []int{1}
+}
+
 // Account represents a Socks account.
 type Account struct {
 	state         protoimpl.MessageState
@@ -224,7 +273,8 @@ type ClientConfig struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Sever is a list of Socks server addresses.
-	Server []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
+	Server  []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
+	Version Version                    `protobuf:"varint,2,opt,name=version,proto3,enum=xray.proxy.socks.Version" json:"version,omitempty"`
 }
 
 func (x *ClientConfig) Reset() {
@@ -266,6 +316,13 @@ func (x *ClientConfig) GetServer() []*protocol.ServerEndpoint {
 	return nil
 }
 
+func (x *ClientConfig) GetVersion() Version {
+	if x != nil {
+		return x.Version
+	}
+	return Version_SOCKS5
+}
+
 var File_proxy_socks_config_proto protoreflect.FileDescriptor
 
 var file_proxy_socks_config_proto_rawDesc = []byte{
@@ -302,20 +359,26 @@ var file_proxy_socks_config_proto_rawDesc = []byte{
 	0x73, 0x45, 0x6e, 0x74, 0x72, 0x79, 0x12, 0x10, 0x0a, 0x03, 0x6b, 0x65, 0x79, 0x18, 0x01, 0x20,
 	0x01, 0x28, 0x09, 0x52, 0x03, 0x6b, 0x65, 0x79, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75,
 	0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x3a, 0x02,
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-	0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e,
-	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72,
-	0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x52, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72,
-	0x2a, 0x25, 0x0a, 0x08, 0x41, 0x75, 0x74, 0x68, 0x54, 0x79, 0x70, 0x65, 0x12, 0x0b, 0x0a, 0x07,
-	0x4e, 0x4f, 0x5f, 0x41, 0x55, 0x54, 0x48, 0x10, 0x00, 0x12, 0x0c, 0x0a, 0x08, 0x50, 0x41, 0x53,
-	0x53, 0x57, 0x4f, 0x52, 0x44, 0x10, 0x01, 0x42, 0x52, 0x0a, 0x14, 0x63, 0x6f, 0x6d, 0x2e, 0x78,
-	0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x73, 0x6f, 0x63, 0x6b, 0x73, 0x50,
-	0x01, 0x5a, 0x25, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74,
-	0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f,
-	0x78, 0x79, 0x2f, 0x73, 0x6f, 0x63, 0x6b, 0x73, 0xaa, 0x02, 0x10, 0x58, 0x72, 0x61, 0x79, 0x2e,
-	0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x53, 0x6f, 0x63, 0x6b, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f,
-	0x74, 0x6f, 0x33,
+	0x38, 0x01, 0x22, 0x81, 0x01, 0x0a, 0x0c, 0x43, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x43, 0x6f, 0x6e,
+	0x66, 0x69, 0x67, 0x12, 0x3c, 0x0a, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x18, 0x01, 0x20,
+	0x03, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f,
+	0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x65,
+	0x72, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x52, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65,
+	0x72, 0x12, 0x33, 0x0a, 0x07, 0x76, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x18, 0x02, 0x20, 0x01,
+	0x28, 0x0e, 0x32, 0x19, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e,
+	0x73, 0x6f, 0x63, 0x6b, 0x73, 0x2e, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x07, 0x76,
+	0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x2a, 0x25, 0x0a, 0x08, 0x41, 0x75, 0x74, 0x68, 0x54, 0x79,
+	0x70, 0x65, 0x12, 0x0b, 0x0a, 0x07, 0x4e, 0x4f, 0x5f, 0x41, 0x55, 0x54, 0x48, 0x10, 0x00, 0x12,
+	0x0c, 0x0a, 0x08, 0x50, 0x41, 0x53, 0x53, 0x57, 0x4f, 0x52, 0x44, 0x10, 0x01, 0x2a, 0x2e, 0x0a,
+	0x07, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x12, 0x0a, 0x0a, 0x06, 0x53, 0x4f, 0x43, 0x4b,
+	0x53, 0x35, 0x10, 0x00, 0x12, 0x0a, 0x0a, 0x06, 0x53, 0x4f, 0x43, 0x4b, 0x53, 0x34, 0x10, 0x01,
+	0x12, 0x0b, 0x0a, 0x07, 0x53, 0x4f, 0x43, 0x4b, 0x53, 0x34, 0x41, 0x10, 0x02, 0x42, 0x52, 0x0a,
+	0x14, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e,
+	0x73, 0x6f, 0x63, 0x6b, 0x73, 0x50, 0x01, 0x5a, 0x25, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e,
+	0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f,
+	0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x73, 0x6f, 0x63, 0x6b, 0x73, 0xaa, 0x02,
+	0x10, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x53, 0x6f, 0x63, 0x6b,
+	0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -330,27 +393,29 @@ func file_proxy_socks_config_proto_rawDescGZIP() []byte {
 	return file_proxy_socks_config_proto_rawDescData
 }
 
-var file_proxy_socks_config_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_proxy_socks_config_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
 var file_proxy_socks_config_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
 var file_proxy_socks_config_proto_goTypes = []interface{}{
 	(AuthType)(0),                   // 0: xray.proxy.socks.AuthType
-	(*Account)(nil),                 // 1: xray.proxy.socks.Account
-	(*ServerConfig)(nil),            // 2: xray.proxy.socks.ServerConfig
-	(*ClientConfig)(nil),            // 3: xray.proxy.socks.ClientConfig
-	nil,                             // 4: xray.proxy.socks.ServerConfig.AccountsEntry
-	(*net.IPOrDomain)(nil),          // 5: xray.common.net.IPOrDomain
-	(*protocol.ServerEndpoint)(nil), // 6: xray.common.protocol.ServerEndpoint
+	(Version)(0),                    // 1: xray.proxy.socks.Version
+	(*Account)(nil),                 // 2: xray.proxy.socks.Account
+	(*ServerConfig)(nil),            // 3: xray.proxy.socks.ServerConfig
+	(*ClientConfig)(nil),            // 4: xray.proxy.socks.ClientConfig
+	nil,                             // 5: xray.proxy.socks.ServerConfig.AccountsEntry
+	(*net.IPOrDomain)(nil),          // 6: xray.common.net.IPOrDomain
+	(*protocol.ServerEndpoint)(nil), // 7: xray.common.protocol.ServerEndpoint
 }
 var file_proxy_socks_config_proto_depIdxs = []int32{
 	0, // 0: xray.proxy.socks.ServerConfig.auth_type:type_name -> xray.proxy.socks.AuthType
-	4, // 1: xray.proxy.socks.ServerConfig.accounts:type_name -> xray.proxy.socks.ServerConfig.AccountsEntry
-	5, // 2: xray.proxy.socks.ServerConfig.address:type_name -> xray.common.net.IPOrDomain
-	6, // 3: xray.proxy.socks.ClientConfig.server:type_name -> xray.common.protocol.ServerEndpoint
-	4, // [4:4] is the sub-list for method output_type
-	4, // [4:4] is the sub-list for method input_type
-	4, // [4:4] is the sub-list for extension type_name
-	4, // [4:4] is the sub-list for extension extendee
-	0, // [0:4] is the sub-list for field type_name
+	5, // 1: xray.proxy.socks.ServerConfig.accounts:type_name -> xray.proxy.socks.ServerConfig.AccountsEntry
+	6, // 2: xray.proxy.socks.ServerConfig.address:type_name -> xray.common.net.IPOrDomain
+	7, // 3: xray.proxy.socks.ClientConfig.server:type_name -> xray.common.protocol.ServerEndpoint
+	1, // 4: xray.proxy.socks.ClientConfig.version:type_name -> xray.proxy.socks.Version
+	5, // [5:5] is the sub-list for method output_type
+	5, // [5:5] is the sub-list for method input_type
+	5, // [5:5] is the sub-list for extension type_name
+	5, // [5:5] is the sub-list for extension extendee
+	0, // [0:5] is the sub-list for field type_name
 }
 
 func init() { file_proxy_socks_config_proto_init() }
@@ -401,7 +466,7 @@ func file_proxy_socks_config_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proxy_socks_config_proto_rawDesc,
-			NumEnums:      1,
+			NumEnums:      2,
 			NumMessages:   4,
 			NumExtensions: 0,
 			NumServices:   0,

proxy/socks/config.proto

@@ -23,6 +23,12 @@ enum AuthType {
   PASSWORD = 1;
 }
 
+enum Version {
+  SOCKS5 = 0;
+  SOCKS4 = 1;
+  SOCKS4A = 2;
+}
+
 // ServerConfig is the protobuf config for Socks server.
 message ServerConfig {
   AuthType auth_type = 1;
@@ -37,4 +43,5 @@ message ServerConfig {
 message ClientConfig {
   // Sever is a list of Socks server addresses.
   repeated xray.common.protocol.ServerEndpoint server = 1;
+  Version version = 2;
 }

proxy/trojan/server.go

@@ -2,7 +2,6 @@ package trojan
 
 import (
 	"context"
-	"crypto/tls"
 	"io"
 	"strconv"
 	"strings"
@@ -23,10 +22,11 @@ import (
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/common/signal"
 	"github.com/xtls/xray-core/common/task"
-	core "github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/features/stats"
+	"github.com/xtls/xray-core/transport/internet/tls"
 	"github.com/xtls/xray-core/transport/internet/udp"
 	"github.com/xtls/xray-core/transport/internet/xtls"
 )

proxy/vmess/account.go

@@ -1,6 +1,8 @@
 package vmess
 
 import (
+	"strings"
+
 	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/uuid"
@@ -14,6 +16,9 @@ type MemoryAccount struct {
 	AlterIDs []*protocol.ID
 	// Security type of the account. Used for client connections.
 	Security protocol.SecurityType
+
+	AuthenticatedLengthExperiment bool
+	NoTerminationSignal           bool
 }
 
 // AnyValidID returns an ID that is either the main ID or one of the alternative IDs if any.
@@ -41,9 +46,18 @@ func (a *Account) AsAccount() (protocol.Account, error) {
 		return nil, newError("failed to parse ID").Base(err).AtError()
 	}
 	protoID := protocol.NewID(id)
+	var AuthenticatedLength, NoTerminationSignal bool
+	if strings.Contains(a.TestsEnabled, "AuthenticatedLength") {
+		AuthenticatedLength = true
+	}
+	if strings.Contains(a.TestsEnabled, "NoTerminationSignal") {
+		NoTerminationSignal = true
+	}
 	return &MemoryAccount{
-		ID:       protoID,
-		AlterIDs: protocol.NewAlterIDs(protoID, uint16(a.AlterId)),
-		Security: a.SecuritySettings.GetSecurityType(),
+		ID:                            protoID,
+		AlterIDs:                      protocol.NewAlterIDs(protoID, uint16(a.AlterId)),
+		Security:                      a.SecuritySettings.GetSecurityType(),
+		AuthenticatedLengthExperiment: AuthenticatedLength,
+		NoTerminationSignal:           NoTerminationSignal,
 	}, nil
 }

proxy/vmess/encoding/auth.go

@@ -7,6 +7,8 @@ import (
 
 	"github.com/xtls/xray-core/common"
 
+	"github.com/xtls/xray-core/common/crypto"
+
 	"golang.org/x/crypto/sha3"
 )
 
@@ -116,3 +118,11 @@ func (s *ShakeSizeParser) NextPaddingLen() uint16 {
 func (s *ShakeSizeParser) MaxPaddingLen() uint16 {
 	return 64
 }
+
+type AEADSizeParser struct {
+	crypto.AEADChunkSizeParser
+}
+
+func NewAEADSizeParser(auth *crypto.AEADAuthenticator) *AEADSizeParser {
+	return &AEADSizeParser{crypto.AEADChunkSizeParser{Auth: auth}}
+}

proxy/vmess/encoding/client.go

@@ -171,6 +171,17 @@ func (c *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
 			NonceGenerator:          GenerateChunkNonce(c.requestBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(c.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD := crypto.NewAesGcm(AuthenticatedLengthKey)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(c.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType(), padding)
 	case protocol.SecurityType_CHACHA20_POLY1305:
 		aead, err := chacha20poly1305.New(GenerateChacha20Poly1305Key(c.requestBodyKey[:]))
@@ -181,6 +192,18 @@ func (c *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
 			NonceGenerator:          GenerateChunkNonce(c.requestBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(c.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD, err := chacha20poly1305.New(GenerateChacha20Poly1305Key(AuthenticatedLengthKey))
+			common.Must(err)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(c.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType(), padding)
 	default:
 		panic("Unknown security type.")
@@ -312,6 +335,17 @@ func (c *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
 			NonceGenerator:          GenerateChunkNonce(c.responseBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(c.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD := crypto.NewAesGcm(AuthenticatedLengthKey)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(c.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType(), padding)
 	case protocol.SecurityType_CHACHA20_POLY1305:
 		aead, _ := chacha20poly1305.New(GenerateChacha20Poly1305Key(c.responseBodyKey[:]))
@@ -321,6 +355,18 @@ func (c *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
 			NonceGenerator:          GenerateChunkNonce(c.responseBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(c.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD, err := chacha20poly1305.New(GenerateChacha20Poly1305Key(AuthenticatedLengthKey))
+			common.Must(err)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(c.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType(), padding)
 	default:
 		panic("Unknown security type.")

proxy/vmess/encoding/server.go

@@ -362,6 +362,17 @@ func (s *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
 			NonceGenerator:          GenerateChunkNonce(s.requestBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(s.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD := crypto.NewAesGcm(AuthenticatedLengthKey)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(s.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType(), padding)
 
 	case protocol.SecurityType_CHACHA20_POLY1305:
@@ -372,6 +383,18 @@ func (s *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
 			NonceGenerator:          GenerateChunkNonce(s.requestBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(s.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD, err := chacha20poly1305.New(GenerateChacha20Poly1305Key(AuthenticatedLengthKey))
+			common.Must(err)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(s.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType(), padding)
 
 	default:
@@ -480,6 +503,17 @@ func (s *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
 			NonceGenerator:          GenerateChunkNonce(s.responseBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(s.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD := crypto.NewAesGcm(AuthenticatedLengthKey)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(s.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType(), padding)
 
 	case protocol.SecurityType_CHACHA20_POLY1305:
@@ -490,6 +524,18 @@ func (s *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
 			NonceGenerator:          GenerateChunkNonce(s.responseBodyIV[:], uint32(aead.NonceSize())),
 			AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
 		}
+		if request.Option.Has(protocol.RequestOptionAuthenticatedLength) {
+			AuthenticatedLengthKey := vmessaead.KDF16(s.requestBodyKey[:], "auth_len")
+			AuthenticatedLengthKeyAEAD, err := chacha20poly1305.New(GenerateChacha20Poly1305Key(AuthenticatedLengthKey))
+			common.Must(err)
+
+			lengthAuth := &crypto.AEADAuthenticator{
+				AEAD:                    AuthenticatedLengthKeyAEAD,
+				NonceGenerator:          GenerateChunkNonce(s.requestBodyIV[:], uint32(aead.NonceSize())),
+				AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
+			}
+			sizeParser = NewAEADSizeParser(lengthAuth)
+		}
 		return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType(), padding)
 
 	default:

proxy/vmess/inbound/inbound.go

@@ -207,7 +207,9 @@ func transferResponse(timer signal.ActivityUpdater, session *encoding.ServerSess
 		return err
 	}
 
-	if request.Option.Has(protocol.RequestOptionChunkStream) {
+	account := request.User.Account.(*vmess.MemoryAccount)
+
+	if request.Option.Has(protocol.RequestOptionChunkStream) && !account.NoTerminationSignal {
 		if err := bodyWriter.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
 			return err
 		}

proxy/vmess/outbound/outbound.go

@@ -119,6 +119,10 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		request.Option.Clear(protocol.RequestOptionChunkMasking)
 	}
 
+	if account.AuthenticatedLengthExperiment {
+		request.Option.Set(protocol.RequestOptionAuthenticatedLength)
+	}
+
 	input := link.Reader
 	output := link.Writer
 
@@ -164,7 +168,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 			return err
 		}
 
-		if request.Option.Has(protocol.RequestOptionChunkStream) {
+		if request.Option.Has(protocol.RequestOptionChunkStream) && !account.NoTerminationSignal {
 			if err := bodyWriter2.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
 				return err
 			}

testing/scenarios/tls_test.go

@@ -826,3 +826,106 @@ func TestGRPCMultiMode(t *testing.T) {
 		t.Error(err)
 	}
 }
+
+func TestSimpleTLSConnectionPinned(t *testing.T) {
+	tcpServer := tcp.Server{
+		MsgProcessor: xor,
+	}
+	dest, err := tcpServer.Start()
+	common.Must(err)
+	defer tcpServer.Close()
+	certificateDer := cert.MustGenerate(nil)
+	certificate := tls.ParseCertificate(certificateDer)
+	certHash := tls.GenerateCertChainHash([][]byte{certificateDer.Certificate})
+	userID := protocol.NewID(uuid.New())
+	serverPort := tcp.PickPort()
+	serverConfig := &core.Config{
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(serverPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+					StreamSettings: &internet.StreamConfig{
+						SecurityType: serial.GetMessageType(&tls.Config{}),
+						SecuritySettings: []*serial.TypedMessage{
+							serial.ToTypedMessage(&tls.Config{
+								Certificate: []*tls.Certificate{certificate},
+							}),
+						},
+					},
+				}),
+				ProxySettings: serial.ToTypedMessage(&inbound.Config{
+					User: []*protocol.User{
+						{
+							Account: serial.ToTypedMessage(&vmess.Account{
+								Id: userID.String(),
+							}),
+						},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
+			},
+		},
+	}
+
+	clientPort := tcp.PickPort()
+	clientConfig := &core.Config{
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(clientPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
+					Address: net.NewIPOrDomain(dest.Address),
+					Port:    uint32(dest.Port),
+					NetworkList: &net.NetworkList{
+						Network: []net.Network{net.Network_TCP},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&outbound.Config{
+					Receiver: []*protocol.ServerEndpoint{
+						{
+							Address: net.NewIPOrDomain(net.LocalHostIP),
+							Port:    uint32(serverPort),
+							User: []*protocol.User{
+								{
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
+						},
+					},
+				}),
+				SenderSettings: serial.ToTypedMessage(&proxyman.SenderConfig{
+					StreamSettings: &internet.StreamConfig{
+						SecurityType: serial.GetMessageType(&tls.Config{}),
+						SecuritySettings: []*serial.TypedMessage{
+							serial.ToTypedMessage(&tls.Config{
+								AllowInsecure:                    true,
+								PinnedPeerCertificateChainSha256: [][]byte{certHash},
+							}),
+						},
+					},
+				}),
+			},
+		},
+	}
+
+	servers, err := InitializeServerConfigs(serverConfig, clientConfig)
+	common.Must(err)
+	defer CloseAllServers(servers)
+
+	if err := testTCPConn(clientPort, 1024, time.Second*2)(); err != nil {
+		t.Fatal(err)
+	}
+}

testing/scenarios/vmess_test.go

@@ -1330,3 +1330,110 @@ func TestVMessZero(t *testing.T) {
 		t.Error(err)
 	}
 }
+
+func TestVMessGCMLengthAuth(t *testing.T) {
+	tcpServer := tcp.Server{
+		MsgProcessor: xor,
+	}
+	dest, err := tcpServer.Start()
+	common.Must(err)
+	defer tcpServer.Close()
+
+	userID := protocol.NewID(uuid.New())
+	serverPort := tcp.PickPort()
+	serverConfig := &core.Config{
+		App: []*serial.TypedMessage{
+			serial.ToTypedMessage(&log.Config{
+				ErrorLogLevel: clog.Severity_Debug,
+				ErrorLogType:  log.LogType_Console,
+			}),
+		},
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(serverPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&inbound.Config{
+					User: []*protocol.User{
+						{
+							Account: serial.ToTypedMessage(&vmess.Account{
+								Id:      userID.String(),
+								AlterId: 64,
+							}),
+						},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
+			},
+		},
+	}
+
+	clientPort := tcp.PickPort()
+	clientConfig := &core.Config{
+		App: []*serial.TypedMessage{
+			serial.ToTypedMessage(&log.Config{
+				ErrorLogLevel: clog.Severity_Debug,
+				ErrorLogType:  log.LogType_Console,
+			}),
+		},
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(clientPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
+					Address: net.NewIPOrDomain(dest.Address),
+					Port:    uint32(dest.Port),
+					NetworkList: &net.NetworkList{
+						Network: []net.Network{net.Network_TCP},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&outbound.Config{
+					Receiver: []*protocol.ServerEndpoint{
+						{
+							Address: net.NewIPOrDomain(net.LocalHostIP),
+							Port:    uint32(serverPort),
+							User: []*protocol.User{
+								{
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id:      userID.String(),
+										AlterId: 64,
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+										TestsEnabled: "AuthenticatedLength",
+									}),
+								},
+							},
+						},
+					},
+				}),
+			},
+		},
+	}
+
+	servers, err := InitializeServerConfigs(serverConfig, clientConfig)
+	if err != nil {
+		t.Fatal("Failed to initialize all servers: ", err.Error())
+	}
+	defer CloseAllServers(servers)
+
+	var errg errgroup.Group
+	for i := 0; i < 10; i++ {
+		errg.Go(testTCPConn(clientPort, 10240*1024, time.Second*40))
+	}
+
+	if err := errg.Wait(); err != nil {
+		t.Error(err)
+	}
+}

transport/internet/dialer.go

@@ -161,6 +161,35 @@ func DialSystem(ctx context.Context, dest net.Destination, sockopt *SocketConfig
 	return effectiveSystemDialer.Dial(ctx, src, dest, sockopt)
 }
 
+func DialSystemDNS(ctx context.Context, dest net.Destination, sockopt *SocketConfig) (net.Conn, error) {
+	var src net.Address
+	if outbound := session.OutboundFromContext(ctx); outbound != nil {
+		src = outbound.Gateway
+	}
+	if sockopt == nil {
+		return effectiveSystemDNSDialer.Dial(ctx, src, dest, sockopt)
+	}
+
+	if canLookupIP(ctx, dest, sockopt) {
+		ips, err := lookupIP(dest.Address.String(), sockopt.DomainStrategy, src)
+		if err == nil && len(ips) > 0 {
+			dest.Address = net.IPAddress(ips[dice.Roll(len(ips))])
+			newError("replace destination with " + dest.String()).AtInfo().WriteToLog()
+		} else if err != nil {
+			newError("failed to resolve ip").Base(err).AtWarning().WriteToLog()
+		}
+	}
+
+	if obm != nil && len(sockopt.DialerProxy) > 0 {
+		nc := redirect(ctx, dest, sockopt.DialerProxy)
+		if nc != nil {
+			return nc, nil
+		}
+	}
+
+	return effectiveSystemDNSDialer.Dial(ctx, src, dest, sockopt)
+}
+
 func InitSystemDialer(dc dns.Client, om outbound.Manager) {
 	dnsClient = dc
 	obm = om

transport/internet/grpc/hub.go

@@ -80,6 +80,7 @@ func Listen(ctx context.Context, address net.Address, port net.Port, settings *i
 	var options []grpc.ServerOption
 	var s *grpc.Server
 	if config != nil {
+		// gRPC server may silently ignore TLS errors
 		options = append(options, grpc.Creds(credentials.NewTLS(config.GetTLSConfig(tls.WithNextProto("h2")))))
 	}
 	if grpcSettings.IdleTimeout > 0 || grpcSettings.HealthCheckTimeout > 0 {

transport/internet/system_dialer.go

@@ -11,7 +11,10 @@ import (
 	"github.com/xtls/xray-core/features/outbound"
 )
 
-var effectiveSystemDialer SystemDialer = &DefaultSystemDialer{}
+var (
+	effectiveSystemDialer    SystemDialer = &DefaultSystemDialer{}
+	effectiveSystemDNSDialer SystemDialer = &DefaultSystemDialer{}
+)
 
 type SystemDialer interface {
 	Dial(ctx context.Context, source net.Address, destination net.Destination, sockopt *SocketConfig) (net.Conn, error)
@@ -65,8 +68,8 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 			return nil, err
 		}
 		return &PacketConnWrapper{
-			conn: packetConn,
-			dest: destAddr,
+			Conn: packetConn,
+			Dest: destAddr,
 		}, nil
 	}
 
@@ -101,50 +104,61 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 	return dialer.DialContext(ctx, dest.Network.SystemString(), dest.NetAddr())
 }
 
+func ApplySockopt(sockopt *SocketConfig, dest net.Destination, fd uintptr, ctx context.Context) {
+	if err := applyOutboundSocketOptions(dest.Network.String(), dest.Address.String(), fd, sockopt); err != nil {
+		newError("failed to apply socket options").Base(err).WriteToLog(session.ExportIDToError(ctx))
+	}
+	if dest.Network == net.Network_UDP && hasBindAddr(sockopt) {
+		if err := bindAddr(fd, sockopt.BindAddress, sockopt.BindPort); err != nil {
+			newError("failed to bind source address to ", sockopt.BindAddress).Base(err).WriteToLog(session.ExportIDToError(ctx))
+		}
+	}
+}
+
 type PacketConnWrapper struct {
-	conn net.PacketConn
-	dest net.Addr
+	Conn net.PacketConn
+	Dest net.Addr
 }
 
 func (c *PacketConnWrapper) Close() error {
-	return c.conn.Close()
+	return c.Conn.Close()
 }
 
 func (c *PacketConnWrapper) LocalAddr() net.Addr {
-	return c.conn.LocalAddr()
+	return c.Conn.LocalAddr()
 }
 
 func (c *PacketConnWrapper) RemoteAddr() net.Addr {
-	return c.dest
+	return c.Dest
 }
 
 func (c *PacketConnWrapper) Write(p []byte) (int, error) {
-	return c.conn.WriteTo(p, c.dest)
+	return c.Conn.WriteTo(p, c.Dest)
 }
 
 func (c *PacketConnWrapper) Read(p []byte) (int, error) {
-	n, _, err := c.conn.ReadFrom(p)
+	n, _, err := c.Conn.ReadFrom(p)
 	return n, err
 }
 
 func (c *PacketConnWrapper) WriteTo(p []byte, d net.Addr) (int, error) {
-	return c.conn.WriteTo(p, d)
+	return c.Conn.WriteTo(p, d)
 }
 
 func (c *PacketConnWrapper) ReadFrom(p []byte) (int, net.Addr, error) {
-	return c.conn.ReadFrom(p)
+	return c.Conn.ReadFrom(p)
 }
 
 func (c *PacketConnWrapper) SetDeadline(t time.Time) error {
-	return c.conn.SetDeadline(t)
+	return c.Conn.SetDeadline(t)
 }
 
 func (c *PacketConnWrapper) SetReadDeadline(t time.Time) error {
-	return c.conn.SetReadDeadline(t)
+	return c.Conn.SetReadDeadline(t)
 }
 
 func (c *PacketConnWrapper) SetWriteDeadline(t time.Time) error {
-	return c.conn.SetWriteDeadline(t)
+	return c.Conn.SetWriteDeadline(t)
 }
 
 type SystemDialerAdapter interface {
@@ -176,6 +190,13 @@ func UseAlternativeSystemDialer(dialer SystemDialer) {
 	effectiveSystemDialer = dialer
 }
 
+func UseAlternativeSystemDNSDialer(dialer SystemDialer) {
+	if dialer == nil {
+		effectiveSystemDNSDialer = &DefaultSystemDialer{}
+	}
+	effectiveSystemDNSDialer = dialer
+}
+
 // RegisterDialerController adds a controller to the effective system dialer.
 // The controller can be used to operate on file descriptors before they are put into use.
 // It only works when effective dialer is the default dialer.

transport/internet/tagged/tagged.go

@@ -0,0 +1,11 @@
+package tagged
+
+import (
+	"context"
+
+	"github.com/xtls/xray-core/common/net"
+)
+
+type DialFunc func(ctx context.Context, dest net.Destination, tag string) (net.Conn, error)
+
+var Dialer DialFunc

transport/internet/tagged/taggedimpl/errors.generated.go

@@ -1,4 +1,4 @@
-package yaml
+package taggedimpl
 
 import "github.com/xtls/xray-core/common/errors"
 

transport/internet/tagged/taggedimpl/impl.go

@@ -0,0 +1,46 @@
+package taggedimpl
+
+import (
+	"context"
+	"github.com/xtls/xray-core/common/net/cnc"
+	"github.com/xtls/xray-core/core"
+
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport/internet/tagged"
+)
+
+func DialTaggedOutbound(ctx context.Context, dest net.Destination, tag string) (net.Conn, error) {
+	var dispatcher routing.Dispatcher
+	if core.FromContext(ctx) == nil {
+		return nil, newError("Instance context variable is not in context, dial denied. ")
+	}
+	if err := core.RequireFeatures(ctx, func(dispatcherInstance routing.Dispatcher) {
+		dispatcher = dispatcherInstance
+	}); err != nil {
+		return nil, newError("Required Feature dispatcher not resolved").Base(err)
+	}
+
+	content := new(session.Content)
+	content.SkipDNSResolve = true
+
+	ctx = session.ContextWithContent(ctx, content)
+	ctx = session.SetForcedOutboundTagToContext(ctx, tag)
+
+	r, err := dispatcher.Dispatch(ctx, dest)
+	if err != nil {
+		return nil, err
+	}
+	var readerOpt cnc.ConnectionOption
+	if dest.Network == net.Network_TCP {
+		readerOpt = cnc.ConnectionOutputMulti(r.Reader)
+	} else {
+		readerOpt = cnc.ConnectionOutputMultiUDP(r.Reader)
+	}
+	return cnc.NewConnection(cnc.ConnectionInputMulti(r.Writer), readerOpt), nil
+}
+
+func init() {
+	tagged.Dialer = DialTaggedOutbound
+}

transport/internet/tagged/taggedimpl/taggedimpl.go

@@ -0,0 +1,3 @@
+package taggedimpl
+
+//go:generate go run github.com/xtls/xray-core/common/errors/errorgen

transport/internet/tls/config.go

@@ -1,8 +1,10 @@
 package tls
 
 import (
+	"crypto/hmac"
 	"crypto/tls"
 	"crypto/x509"
+	"encoding/base64"
 	"strings"
 	"sync"
 	"time"
@@ -254,6 +256,19 @@ func (c *Config) parseServerName() string {
 	return c.ServerName
 }
 
+func (c *Config) verifyPeerCert(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
+	if c.PinnedPeerCertificateChainSha256 != nil {
+		hashValue := GenerateCertChainHash(rawCerts)
+		for _, v := range c.PinnedPeerCertificateChainSha256 {
+			if hmac.Equal(hashValue, v) {
+				return nil
+			}
+		}
+		return newError("peer cert is unrecognized: ", base64.StdEncoding.EncodeToString(hashValue))
+	}
+	return nil
+}
+
 // GetTLSConfig converts this Config into tls.Config.
 func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
 	root, err := c.getCertPool()
@@ -277,6 +292,7 @@ func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
 		InsecureSkipVerify:     c.AllowInsecure,
 		NextProtos:             c.NextProtocol,
 		SessionTicketsDisabled: !c.EnableSessionResumption,
+		VerifyPeerCertificate:  c.verifyPeerCert,
 	}
 
 	for _, opt := range opts {

transport/internet/tls/config.pb.go

@@ -198,6 +198,11 @@ type Config struct {
 	// TLS Client Hello fingerprint (uTLS).
 	Fingerprint      string `protobuf:"bytes,11,opt,name=fingerprint,proto3" json:"fingerprint,omitempty"`
 	RejectUnknownSni bool   `protobuf:"varint,12,opt,name=reject_unknown_sni,json=rejectUnknownSni,proto3" json:"reject_unknown_sni,omitempty"`
+	// @Document A pinned certificate chain sha256 hash.
+	//@Document If the server's hash does not match this value, the connection will be aborted.
+	//@Document This value replace allow_insecure.
+	//@Critical
+	PinnedPeerCertificateChainSha256 [][]byte `protobuf:"bytes,13,rep,name=pinned_peer_certificate_chain_sha256,json=pinnedPeerCertificateChainSha256,proto3" json:"pinned_peer_certificate_chain_sha256,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -316,6 +321,13 @@ func (x *Config) GetRejectUnknownSni() bool {
 	return false
 }
 
+func (x *Config) GetPinnedPeerCertificateChainSha256() [][]byte {
+	if x != nil {
+		return x.PinnedPeerCertificateChainSha256
+	}
+	return nil
+}
+
 var File_transport_internet_tls_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_tls_config_proto_rawDesc = []byte{
@@ -345,7 +357,7 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12, 0x14, 0x0a, 0x10,
 	0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f, 0x56, 0x45, 0x52, 0x49, 0x46, 0x59,
 	0x10, 0x01, 0x12, 0x13, 0x0a, 0x0f, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f,
-	0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xa3, 0x04, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
+	0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xf3, 0x04, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
 	0x69, 0x67, 0x12, 0x25, 0x0a, 0x0e, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x5f, 0x69, 0x6e, 0x73, 0x65,
 	0x63, 0x75, 0x72, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08, 0x52, 0x0d, 0x61, 0x6c, 0x6c, 0x6f,
 	0x77, 0x49, 0x6e, 0x73, 0x65, 0x63, 0x75, 0x72, 0x65, 0x12, 0x4a, 0x0a, 0x0b, 0x63, 0x65, 0x72,
@@ -379,7 +391,12 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x28, 0x09, 0x52, 0x0b, 0x66, 0x69, 0x6e, 0x67, 0x65, 0x72, 0x70, 0x72, 0x69, 0x6e, 0x74, 0x12,
 	0x2c, 0x0a, 0x12, 0x72, 0x65, 0x6a, 0x65, 0x63, 0x74, 0x5f, 0x75, 0x6e, 0x6b, 0x6e, 0x6f, 0x77,
 	0x6e, 0x5f, 0x73, 0x6e, 0x69, 0x18, 0x0c, 0x20, 0x01, 0x28, 0x08, 0x52, 0x10, 0x72, 0x65, 0x6a,
-	0x65, 0x63, 0x74, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x53, 0x6e, 0x69, 0x42, 0x73, 0x0a,
+	0x65, 0x63, 0x74, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x53, 0x6e, 0x69, 0x12, 0x4e, 0x0a,
+	0x24, 0x70, 0x69, 0x6e, 0x6e, 0x65, 0x64, 0x5f, 0x70, 0x65, 0x65, 0x72, 0x5f, 0x63, 0x65, 0x72,
+	0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x5f, 0x63, 0x68, 0x61, 0x69, 0x6e, 0x5f, 0x73,
+	0x68, 0x61, 0x32, 0x35, 0x36, 0x18, 0x0d, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x20, 0x70, 0x69, 0x6e,
+	0x6e, 0x65, 0x64, 0x50, 0x65, 0x65, 0x72, 0x43, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61,
+	0x74, 0x65, 0x43, 0x68, 0x61, 0x69, 0x6e, 0x53, 0x68, 0x61, 0x32, 0x35, 0x36, 0x42, 0x73, 0x0a,
 	0x1f, 0x63, 0x6f, 0x6d, 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, 0x74, 0x6c, 0x73,
 	0x50, 0x01, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78,

transport/internet/tls/config.proto

@@ -69,4 +69,11 @@ message Config {
   string fingerprint = 11;
 
   bool reject_unknown_sni = 12;
+  
+  /* @Document A pinned certificate chain sha256 hash.
+     @Document If the server's hash does not match this value, the connection will be aborted.
+     @Document This value replace allow_insecure.
+     @Critical
+  */
+  repeated bytes pinned_peer_certificate_chain_sha256 = 13;
 }