Update version 1.5.1

Occasional error is observed when we execute long test
Print time and memory for better troubleshooting in the future

Co-authored-by: Jebbs <qjebbs@gmail.com>

.gitignore

@@ -0,0 +1,29 @@
+# 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
+.vscode

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

@@ -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/dns_test.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/miekg/dns"
+
 	"github.com/xtls/xray-core/app/dispatcher"
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/app/policy"

app/dns/fakedns/fakedns_test.go

@@ -1,9 +1,8 @@
 package fakedns
 
 import (
-	"testing"
-
 	gonet "net"
+	"testing"
 
 	"github.com/stretchr/testify/assert"
 

app/dns/hosts_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
+
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"

app/dns/nameserver_local.go

@@ -4,9 +4,8 @@ import (
 	"context"
 	"strings"
 
-	"github.com/xtls/xray-core/features/dns"
-
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/dns/localdns"
 )
 

app/dns/nameserver_local_test.go

@@ -5,10 +5,9 @@ import (
 	"testing"
 	"time"
 
-	"github.com/xtls/xray-core/common/net"
-
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/features/dns"
 )
 

app/dns/nameserver_quic.go

@@ -8,6 +8,9 @@ import (
 	"time"
 
 	"github.com/lucas-clemente/quic-go"
+	"golang.org/x/net/dns/dnsmessage"
+	"golang.org/x/net/http2"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
@@ -17,8 +20,6 @@ import (
 	"github.com/xtls/xray-core/common/task"
 	dns_feature "github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/transport/internet/tls"
-	"golang.org/x/net/dns/dnsmessage"
-	"golang.org/x/net/http2"
 )
 
 // NextProtoDQ - During connection establishment, DNS/QUIC support is indicated

app/dns/nameserver_quic_test.go

@@ -6,13 +6,12 @@ import (
 	"testing"
 	"time"
 
-	"github.com/xtls/xray-core/features/dns"
-
 	"github.com/google/go-cmp/cmp"
 
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features/dns"
 )
 
 func TestQUICNameServer(t *testing.T) {

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/command/command.go

@@ -0,0 +1,51 @@
+//go:build !confonly
+// +build !confonly
+
+package command
+
+import (
+	"context"
+
+	"google.golang.org/grpc"
+
+	"github.com/xtls/xray-core/app/observatory"
+	"github.com/xtls/xray-core/common"
+	core "github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/extension"
+)
+
+type service struct {
+	UnimplementedObservatoryServiceServer
+	v *core.Instance
+
+	observatory extension.Observatory
+}
+
+func (s *service) GetOutboundStatus(ctx context.Context, request *GetOutboundStatusRequest) (*GetOutboundStatusResponse, error) {
+	resp, err := s.observatory.GetObservation(ctx)
+	if err != nil {
+		return nil, err
+	}
+	retdata := resp.(*observatory.ObservationResult)
+	return &GetOutboundStatusResponse{
+		Status: retdata,
+	}, nil
+}
+
+func (s *service) Register(server *grpc.Server) {
+	RegisterObservatoryServiceServer(server, s)
+}
+
+func init() {
+	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, cfg interface{}) (interface{}, error) {
+		s := core.MustFromContext(ctx)
+		sv := &service{v: s}
+		err := s.RequireFeatures(func(Observatory extension.Observatory) {
+			sv.observatory = Observatory
+		})
+		if err != nil {
+			return nil, err
+		}
+		return sv, nil
+	}))
+}

app/observatory/command/command.pb.go

@@ -0,0 +1,278 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
+// source: app/observatory/command/command.proto
+
+package command
+
+import (
+	observatory "github.com/xtls/xray-core/app/observatory"
+	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 GetOutboundStatusRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *GetOutboundStatusRequest) Reset() {
+	*x = GetOutboundStatusRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_command_command_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetOutboundStatusRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetOutboundStatusRequest) ProtoMessage() {}
+
+func (x *GetOutboundStatusRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_command_command_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 GetOutboundStatusRequest.ProtoReflect.Descriptor instead.
+func (*GetOutboundStatusRequest) Descriptor() ([]byte, []int) {
+	return file_app_observatory_command_command_proto_rawDescGZIP(), []int{0}
+}
+
+type GetOutboundStatusResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Status *observatory.ObservationResult `protobuf:"bytes,1,opt,name=status,proto3" json:"status,omitempty"`
+}
+
+func (x *GetOutboundStatusResponse) Reset() {
+	*x = GetOutboundStatusResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_command_command_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetOutboundStatusResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetOutboundStatusResponse) ProtoMessage() {}
+
+func (x *GetOutboundStatusResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_command_command_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 GetOutboundStatusResponse.ProtoReflect.Descriptor instead.
+func (*GetOutboundStatusResponse) Descriptor() ([]byte, []int) {
+	return file_app_observatory_command_command_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *GetOutboundStatusResponse) GetStatus() *observatory.ObservationResult {
+	if x != nil {
+		return x.Status
+	}
+	return nil
+}
+
+type Config struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_command_command_proto_msgTypes[2]
+		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_command_command_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 Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_app_observatory_command_command_proto_rawDescGZIP(), []int{2}
+}
+
+var File_app_observatory_command_command_proto protoreflect.FileDescriptor
+
+var file_app_observatory_command_command_proto_rawDesc = []byte{
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+	0x79, 0x2e, 0x43, 0x6f, 0x72, 0x65, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x4f, 0x62, 0x73, 0x65, 0x72,
+	0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_app_observatory_command_command_proto_rawDescOnce sync.Once
+	file_app_observatory_command_command_proto_rawDescData = file_app_observatory_command_command_proto_rawDesc
+)
+
+func file_app_observatory_command_command_proto_rawDescGZIP() []byte {
+	file_app_observatory_command_command_proto_rawDescOnce.Do(func() {
+		file_app_observatory_command_command_proto_rawDescData = protoimpl.X.CompressGZIP(file_app_observatory_command_command_proto_rawDescData)
+	})
+	return file_app_observatory_command_command_proto_rawDescData
+}
+
+var file_app_observatory_command_command_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_app_observatory_command_command_proto_goTypes = []interface{}{
+	(*GetOutboundStatusRequest)(nil),      // 0: xray.core.app.observatory.command.GetOutboundStatusRequest
+	(*GetOutboundStatusResponse)(nil),     // 1: xray.core.app.observatory.command.GetOutboundStatusResponse
+	(*Config)(nil),                        // 2: xray.core.app.observatory.command.Config
+	(*observatory.ObservationResult)(nil), // 3: xray.core.app.observatory.ObservationResult
+}
+var file_app_observatory_command_command_proto_depIdxs = []int32{
+	3, // 0: xray.core.app.observatory.command.GetOutboundStatusResponse.status:type_name -> xray.core.app.observatory.ObservationResult
+	0, // 1: xray.core.app.observatory.command.ObservatoryService.GetOutboundStatus:input_type -> xray.core.app.observatory.command.GetOutboundStatusRequest
+	1, // 2: xray.core.app.observatory.command.ObservatoryService.GetOutboundStatus:output_type -> xray.core.app.observatory.command.GetOutboundStatusResponse
+	2, // [2:3] is the sub-list for method output_type
+	1, // [1:2] 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_command_command_proto_init() }
+func file_app_observatory_command_command_proto_init() {
+	if File_app_observatory_command_command_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_app_observatory_command_command_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetOutboundStatusRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_command_command_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetOutboundStatusResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_command_command_proto_msgTypes[2].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_command_command_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_app_observatory_command_command_proto_goTypes,
+		DependencyIndexes: file_app_observatory_command_command_proto_depIdxs,
+		MessageInfos:      file_app_observatory_command_command_proto_msgTypes,
+	}.Build()
+	File_app_observatory_command_command_proto = out.File
+	file_app_observatory_command_command_proto_rawDesc = nil
+	file_app_observatory_command_command_proto_goTypes = nil
+	file_app_observatory_command_command_proto_depIdxs = nil
+}

app/observatory/command/command.proto

@@ -0,0 +1,24 @@
+syntax = "proto3";
+
+package xray.core.app.observatory.command;
+option csharp_namespace = "Xray.Core.App.Observatory.Command";
+option go_package = "github.com/xtls/xray-core/app/observatory/command";
+option java_package = "com.xray.core.app.observatory.command";
+option java_multiple_files = true;
+
+import "app/observatory/config.proto";
+
+message GetOutboundStatusRequest {
+}
+
+message GetOutboundStatusResponse {
+  xray.core.app.observatory.ObservationResult status = 1;
+}
+
+service ObservatoryService {
+  rpc GetOutboundStatus(GetOutboundStatusRequest)
+      returns (GetOutboundStatusResponse) {}
+}
+
+
+message Config {}

app/observatory/command/command_grpc.pb.go

@@ -0,0 +1,101 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package command
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// ObservatoryServiceClient is the client API for ObservatoryService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type ObservatoryServiceClient interface {
+	GetOutboundStatus(ctx context.Context, in *GetOutboundStatusRequest, opts ...grpc.CallOption) (*GetOutboundStatusResponse, error)
+}
+
+type observatoryServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewObservatoryServiceClient(cc grpc.ClientConnInterface) ObservatoryServiceClient {
+	return &observatoryServiceClient{cc}
+}
+
+func (c *observatoryServiceClient) GetOutboundStatus(ctx context.Context, in *GetOutboundStatusRequest, opts ...grpc.CallOption) (*GetOutboundStatusResponse, error) {
+	out := new(GetOutboundStatusResponse)
+	err := c.cc.Invoke(ctx, "/xray.core.app.observatory.command.ObservatoryService/GetOutboundStatus", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ObservatoryServiceServer is the server API for ObservatoryService service.
+// All implementations must embed UnimplementedObservatoryServiceServer
+// for forward compatibility
+type ObservatoryServiceServer interface {
+	GetOutboundStatus(context.Context, *GetOutboundStatusRequest) (*GetOutboundStatusResponse, error)
+	mustEmbedUnimplementedObservatoryServiceServer()
+}
+
+// UnimplementedObservatoryServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedObservatoryServiceServer struct {
+}
+
+func (UnimplementedObservatoryServiceServer) GetOutboundStatus(context.Context, *GetOutboundStatusRequest) (*GetOutboundStatusResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetOutboundStatus not implemented")
+}
+func (UnimplementedObservatoryServiceServer) mustEmbedUnimplementedObservatoryServiceServer() {}
+
+// UnsafeObservatoryServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to ObservatoryServiceServer will
+// result in compilation errors.
+type UnsafeObservatoryServiceServer interface {
+	mustEmbedUnimplementedObservatoryServiceServer()
+}
+
+func RegisterObservatoryServiceServer(s grpc.ServiceRegistrar, srv ObservatoryServiceServer) {
+	s.RegisterService(&ObservatoryService_ServiceDesc, srv)
+}
+
+func _ObservatoryService_GetOutboundStatus_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetOutboundStatusRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ObservatoryServiceServer).GetOutboundStatus(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/xray.core.app.observatory.command.ObservatoryService/GetOutboundStatus",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ObservatoryServiceServer).GetOutboundStatus(ctx, req.(*GetOutboundStatusRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// ObservatoryService_ServiceDesc is the grpc.ServiceDesc for ObservatoryService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var ObservatoryService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "xray.core.app.observatory.command.ObservatoryService",
+	HandlerType: (*ObservatoryServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetOutboundStatus",
+			Handler:    _ObservatoryService_GetOutboundStatus_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "app/observatory/command/command.proto",
+}

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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+	0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x6f, 0x62,
+	0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x50, 0x01, 0x5a, 0x29, 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, 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 +1,239 @@
+package observatory
+
+import (
+	"context"
+	"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/core"
+	"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
+}
+
+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)
+
+		o.updateStatus(outbounds)
+
+		sleepTime := time.Second * 10
+		if o.config.ProbeInterval != 0 {
+			sleepTime = time.Duration(o.config.ProbeInterval)
+		}
+
+		if !o.config.EnableConcurrency {
+			sort.Strings(outbounds)
+			for _, v := range outbounds {
+				result := o.probe(v)
+				o.updateStatusForResult(v, &result)
+				if o.finished.Done() {
+					return
+				}
+				time.Sleep(sleepTime)
+			}
+			continue
+		}
+
+		ch := make(chan struct{}, len(outbounds))
+
+		for _, v := range outbounds {
+			go func(v string) {
+				result := o.probe(v)
+				o.updateStatusForResult(v, &result)
+				ch <- struct{}{}
+			}(v)
+		}
+
+		for range outbounds {
+			select {
+			case <-ch:
+			case <-o.finished.Wait():
+				return
+			}
+		}
+		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 Xray'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://www.google.com/generate_204"
+		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
+	}
+}
+
+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/proxyman/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.27.1
-// 	protoc        v3.18.0
+// 	protoc        v3.19.1
 // source: app/proxyman/config.proto
 
 package proxyman
@@ -238,8 +238,10 @@ type SniffingConfig struct {
 	DestinationOverride []string `protobuf:"bytes,2,rep,name=destination_override,json=destinationOverride,proto3" json:"destination_override,omitempty"`
 	DomainsExcluded     []string `protobuf:"bytes,3,rep,name=domains_excluded,json=domainsExcluded,proto3" json:"domains_excluded,omitempty"`
 	// 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.
+	// 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() {
@@ -302,13 +304,20 @@ 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
 	unknownFields protoimpl.UnknownFields
 
-	// PortRange specifies the ports which the Receiver should listen on.
-	PortRange *net.PortRange `protobuf:"bytes,1,opt,name=port_range,json=portRange,proto3" json:"port_range,omitempty"`
+	// PortList specifies the ports which the Receiver should listen on.
+	PortList *net.PortList `protobuf:"bytes,1,opt,name=port_list,json=portList,proto3" json:"port_list,omitempty"`
 	// Listen specifies the IP address that the Receiver should listen on.
 	Listen                     *net.IPOrDomain        `protobuf:"bytes,2,opt,name=listen,proto3" json:"listen,omitempty"`
 	AllocationStrategy         *AllocationStrategy    `protobuf:"bytes,3,opt,name=allocation_strategy,json=allocationStrategy,proto3" json:"allocation_strategy,omitempty"`
@@ -354,9 +363,9 @@ func (*ReceiverConfig) Descriptor() ([]byte, []int) {
 	return file_app_proxyman_config_proto_rawDescGZIP(), []int{3}
 }
 
-func (x *ReceiverConfig) GetPortRange() *net.PortRange {
+func (x *ReceiverConfig) GetPortList() *net.PortList {
 	if x != nil {
-		return x.PortRange
+		return x.PortList
 	}
 	return nil
 }
@@ -769,7 +778,7 @@ 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 +789,88 @@ 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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 }
 
 var (
@@ -889,7 +900,7 @@ var file_app_proxyman_config_proto_goTypes = []interface{}{
 	(*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.PortList)(nil),                                     // 12: xray.common.net.PortList
 	(*net.IPOrDomain)(nil),                                   // 13: xray.common.net.IPOrDomain
 	(*internet.StreamConfig)(nil),                            // 14: xray.transport.internet.StreamConfig
 	(*serial.TypedMessage)(nil),                              // 15: xray.common.serial.TypedMessage
@@ -899,7 +910,7 @@ 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
+	12, // 3: xray.app.proxyman.ReceiverConfig.port_list:type_name -> xray.common.net.PortList
 	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

app/proxyman/config.proto

@@ -27,17 +27,13 @@ message AllocationStrategy {
 
   Type type = 1;
 
-  message AllocationStrategyConcurrency {
-    uint32 value = 1;
-  }
+  message AllocationStrategyConcurrency { uint32 value = 1; }
 
   // Number of handlers (ports) running in parallel.
   // Default value is 3 if unset.
   AllocationStrategyConcurrency concurrency = 2;
 
-  message AllocationStrategyRefresh {
-    uint32 value = 1;
-  }
+  message AllocationStrategyRefresh { uint32 value = 1; }
 
   // Number of minutes before a handler is regenerated.
   // Default value is 5 if unset.
@@ -57,15 +53,18 @@ message SniffingConfig {
   // Supported values are "http", "tls", "fakedns".
   repeated string destination_override = 2;
   repeated string domains_excluded = 3;
-  
+
   // 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.
+  // Can be used to support SMTP like protocol where server send the first
+  // message.
   bool metadata_only = 4;
+
+  bool route_only = 5;
 }
 
 message ReceiverConfig {
-  // PortRange specifies the ports which the Receiver should listen on.
-  xray.common.net.PortRange port_range = 1;
+  // PortList specifies the ports which the Receiver should listen on.
+  xray.common.net.PortList port_list = 1;
   // Listen specifies the IP address that the Receiver should listen on.
   xray.common.net.IPOrDomain listen = 2;
   AllocationStrategy allocation_strategy = 3;
@@ -74,7 +73,7 @@ message ReceiverConfig {
   reserved 6;
   // Override domains for the given protocol.
   // Deprecated. Use sniffing_settings.
-  repeated KnownProtocols domain_override = 7 [deprecated = true];
+  repeated KnownProtocols domain_override = 7 [ deprecated = true ];
   SniffingConfig sniffing_settings = 8;
 }
 

app/proxyman/inbound/always.go

@@ -67,7 +67,7 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 	uplinkCounter, downlinkCounter := getStatCounter(core.MustFromContext(ctx), tag)
 
 	nl := p.Network()
-	pr := receiverConfig.PortRange
+	pl := receiverConfig.PortList
 	address := receiverConfig.Listen.AsAddress()
 	if address == nil {
 		address = net.AnyIP
@@ -87,7 +87,7 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 		}
 		mss.SocketSettings.ReceiveOriginalDestAddress = true
 	}
-	if pr == nil {
+	if pl == nil {
 		if net.HasNetwork(nl, net.Network_UNIX) {
 			newError("creating unix domain socket worker on ", address).AtDebug().WriteToLog()
 
@@ -105,43 +105,46 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 			h.workers = append(h.workers, worker)
 		}
 	}
-	if pr != nil {
-		for port := pr.From; port <= pr.To; port++ {
-			if net.HasNetwork(nl, net.Network_TCP) {
-				newError("creating stream worker on ", address, ":", port).AtDebug().WriteToLog()
+	if pl != nil {
+		for _, pr := range pl.Range {
+			for port := pr.From; port <= pr.To; port++ {
+				if net.HasNetwork(nl, net.Network_TCP) {
+					newError("creating stream worker on ", address, ":", port).AtDebug().WriteToLog()
 
-				worker := &tcpWorker{
-					address:         address,
-					port:            net.Port(port),
-					proxy:           p,
-					stream:          mss,
-					recvOrigDest:    receiverConfig.ReceiveOriginalDestination,
-					tag:             tag,
-					dispatcher:      h.mux,
-					sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
-					uplinkCounter:   uplinkCounter,
-					downlinkCounter: downlinkCounter,
-					ctx:             ctx,
+					worker := &tcpWorker{
+						address:         address,
+						port:            net.Port(port),
+						proxy:           p,
+						stream:          mss,
+						recvOrigDest:    receiverConfig.ReceiveOriginalDestination,
+						tag:             tag,
+						dispatcher:      h.mux,
+						sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
+						uplinkCounter:   uplinkCounter,
+						downlinkCounter: downlinkCounter,
+						ctx:             ctx,
+					}
+					h.workers = append(h.workers, worker)
 				}
-				h.workers = append(h.workers, worker)
-			}
 
-			if net.HasNetwork(nl, net.Network_UDP) {
-				worker := &udpWorker{
-					tag:             tag,
-					proxy:           p,
-					address:         address,
-					port:            net.Port(port),
-					dispatcher:      h.mux,
-					sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
-					uplinkCounter:   uplinkCounter,
-					downlinkCounter: downlinkCounter,
-					stream:          mss,
-					ctx:             ctx,
+				if net.HasNetwork(nl, net.Network_UDP) {
+					worker := &udpWorker{
+						tag:             tag,
+						proxy:           p,
+						address:         address,
+						port:            net.Port(port),
+						dispatcher:      h.mux,
+						sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
+						uplinkCounter:   uplinkCounter,
+						downlinkCounter: downlinkCounter,
+						stream:          mss,
+						ctx:             ctx,
+					}
+					h.workers = append(h.workers, worker)
 				}
-				h.workers = append(h.workers, worker)
 			}
 		}
+
 	}
 
 	return h, nil

app/proxyman/inbound/dynamic.go

@@ -69,21 +69,25 @@ func NewDynamicInboundHandler(ctx context.Context, tag string, receiverConfig *p
 }
 
 func (h *DynamicInboundHandler) allocatePort() net.Port {
-	from := int(h.receiverConfig.PortRange.From)
-	delta := int(h.receiverConfig.PortRange.To) - from + 1
-
+	allPorts := []int32{}
+	for _, pr := range h.receiverConfig.PortList.Range {
+		for i := pr.From; i <= pr.To; i++ {
+			allPorts = append(allPorts, int32(i))
+		}
+	}
 	h.portMutex.Lock()
 	defer h.portMutex.Unlock()
 
 	for {
-		r := dice.Roll(delta)
-		port := net.Port(from + r)
+		r := dice.Roll(len(allPorts))
+		port := net.Port(allPorts[r])
 		_, used := h.portsInUse[port]
 		if !used {
 			h.portsInUse[port] = true
 			return port
 		}
 	}
+
 }
 
 func (h *DynamicInboundHandler) closeWorkers(workers []worker) {

app/proxyman/inbound/worker.go

@@ -6,8 +6,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
@@ -20,6 +18,7 @@ import (
 	"github.com/xtls/xray-core/features/stats"
 	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tcp"
 	"github.com/xtls/xray-core/transport/internet/udp"
 	"github.com/xtls/xray-core/transport/pipe"
@@ -101,6 +100,7 @@ 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 +160,11 @@ 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 +325,18 @@ 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 +364,11 @@ 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 +476,7 @@ 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

@@ -3,8 +3,6 @@ package outbound
 import (
 	"context"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/mux"
@@ -18,6 +16,7 @@ import (
 	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
 	"github.com/xtls/xray-core/transport/pipe"
 )
@@ -136,13 +135,17 @@ func (h *Handler) Tag() string {
 func (h *Handler) Dispatch(ctx context.Context, link *transport.Link) {
 	if h.mux != nil && (h.mux.Enabled || session.MuxPreferedFromContext(ctx)) {
 		if err := h.mux.Dispatch(ctx, link); err != nil {
-			newError("failed to process mux outbound traffic").Base(err).WriteToLog(session.ExportIDToError(ctx))
+			err := newError("failed to process mux outbound traffic").Base(err)
+			session.SubmitOutboundErrorToOriginator(ctx, err)
+			err.WriteToLog(session.ExportIDToError(ctx))
 			common.Interrupt(link.Writer)
 		}
 	} else {
 		if err := h.proxy.Process(ctx, link, h); err != nil {
 			// Ensure outbound ray is properly closed.
-			newError("failed to process outbound traffic").Base(err).WriteToLog(session.ExportIDToError(ctx))
+			err := newError("failed to process outbound traffic").Base(err)
+			session.SubmitOutboundErrorToOriginator(ctx, err)
+			err.WriteToLog(session.ExportIDToError(ctx))
 			common.Interrupt(link.Writer)
 		} else {
 			common.Must(common.Close(link.Writer))

app/proxyman/outbound/handler_test.go

@@ -4,8 +4,6 @@ import (
 	"context"
 	"testing"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/app/policy"
 	. "github.com/xtls/xray-core/app/proxyman/outbound"
 	"github.com/xtls/xray-core/app/stats"
@@ -14,6 +12,7 @@ import (
 	core "github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/outbound"
 	"github.com/xtls/xray-core/proxy/freedom"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 func TestInterfaces(t *testing.T) {

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/command_test.go

@@ -284,7 +284,7 @@ func TestSerivceTestRoute(t *testing.T) {
 	r := new(router.Router)
 	mockCtl := gomock.NewController(t)
 	defer mockCtl.Finish()
-	common.Must(r.Init(&router.Config{
+	common.Must(r.Init(context.TODO(), &router.Config{
 		Rule: []*router.RoutingRule{
 			{
 				InboundTag: []string{"in"},

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

@@ -158,9 +158,21 @@ func (rr *RoutingRule) BuildCondition() (Condition, error) {
 }
 
 func (br *BalancingRule) Build(ohm outbound.Manager) (*Balancer, error) {
-	return &Balancer{
-		selectors: br.OutboundSelector,
-		strategy:  &RandomStrategy{},
-		ohm:       ohm,
-	}, nil
+	switch br.Strategy {
+	case "leastPing":
+		return &Balancer{
+			selectors: br.OutboundSelector,
+			strategy:  &LeastPingStrategy{},
+			ohm:       ohm,
+		}, nil
+	case "random":
+		fallthrough
+	default:
+		return &Balancer{
+			selectors: br.OutboundSelector,
+			strategy:  &RandomStrategy{},
+			ohm:       ohm,
+		}, nil
+
+	}
 }

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
@@ -700,6 +708,7 @@ 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 +757,13 @@ 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
@@ -930,105 +946,110 @@ var file_app_router_config_proto_rawDesc = []byte{
 	0x03, 0x22, 0x2e, 0x0a, 0x04, 0x43, 0x49, 0x44, 0x52, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x70, 0x18,
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+	0x33,
 }
 
 var (

app/router/config.proto

@@ -54,6 +54,7 @@ message CIDR {
 message GeoIP {
   string country_code = 1;
   repeated CIDR cidr = 2;
+  bool reverse_match = 3;
 }
 
 message GeoIPList {
@@ -126,6 +127,7 @@ message RoutingRule {
 message BalancingRule {
   string tag = 1;
   repeated string outbound_selector = 2;
+  string strategy = 3;
 }
 
 message Config {

app/router/router.go

@@ -29,7 +29,7 @@ type Route struct {
 }
 
 // Init initializes the Router.
-func (r *Router) Init(config *Config, d dns.Client, ohm outbound.Manager) error {
+func (r *Router) Init(ctx context.Context, config *Config, d dns.Client, ohm outbound.Manager) error {
 	r.domainStrategy = config.DomainStrategy
 	r.dns = d
 
@@ -39,6 +39,7 @@ func (r *Router) Init(config *Config, d dns.Client, ohm outbound.Manager) error
 		if err != nil {
 			return err
 		}
+		balancer.InjectContext(ctx)
 		r.balancers[rule.Tag] = balancer
 	}
 
@@ -140,7 +141,7 @@ func init() {
 	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
 		r := new(Router)
 		if err := core.RequireFeatures(ctx, func(d dns.Client, ohm outbound.Manager) error {
-			return r.Init(config.(*Config), d, ohm)
+			return r.Init(ctx, config.(*Config), d, ohm)
 		}); err != nil {
 			return nil, err
 		}

app/router/router_test.go

@@ -4,14 +4,13 @@ import (
 	"context"
 	"testing"
 
-	"github.com/xtls/xray-core/features/dns"
-
 	"github.com/golang/mock/gomock"
 
 	. "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/session"
+	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/outbound"
 	routing_session "github.com/xtls/xray-core/features/routing/session"
 	"github.com/xtls/xray-core/testing/mocks"
@@ -42,7 +41,7 @@ func TestSimpleRouter(t *testing.T) {
 	mockHs := mocks.NewOutboundHandlerSelector(mockCtl)
 
 	r := new(Router)
-	common.Must(r.Init(config, mockDNS, &mockOutboundManager{
+	common.Must(r.Init(context.TODO(), config, mockDNS, &mockOutboundManager{
 		Manager:         mockOhm,
 		HandlerSelector: mockHs,
 	}))
@@ -83,7 +82,7 @@ func TestSimpleBalancer(t *testing.T) {
 	mockHs.EXPECT().Select(gomock.Eq([]string{"test-"})).Return([]string{"test"})
 
 	r := new(Router)
-	common.Must(r.Init(config, mockDNS, &mockOutboundManager{
+	common.Must(r.Init(context.TODO(), config, mockDNS, &mockOutboundManager{
 		Manager:         mockOhm,
 		HandlerSelector: mockHs,
 	}))
@@ -125,7 +124,7 @@ func TestIPOnDemand(t *testing.T) {
 	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
-	common.Must(r.Init(config, mockDNS, nil))
+	common.Must(r.Init(context.TODO(), config, mockDNS, nil))
 
 	ctx := session.ContextWithOutbound(context.Background(), &session.Outbound{Target: net.TCPDestination(net.DomainAddress("example.com"), 80)})
 	route, err := r.PickRoute(routing_session.AsRoutingContext(ctx))
@@ -164,7 +163,7 @@ func TestIPIfNonMatchDomain(t *testing.T) {
 	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
-	common.Must(r.Init(config, mockDNS, nil))
+	common.Must(r.Init(context.TODO(), config, mockDNS, nil))
 
 	ctx := session.ContextWithOutbound(context.Background(), &session.Outbound{Target: net.TCPDestination(net.DomainAddress("example.com"), 80)})
 	route, err := r.PickRoute(routing_session.AsRoutingContext(ctx))
@@ -198,7 +197,7 @@ func TestIPIfNonMatchIP(t *testing.T) {
 	mockDNS := mocks.NewDNSClient(mockCtl)
 
 	r := new(Router)
-	common.Must(r.Init(config, mockDNS, nil))
+	common.Must(r.Init(context.TODO(), config, mockDNS, nil))
 
 	ctx := session.ContextWithOutbound(context.Background(), &session.Outbound{Target: net.TCPDestination(net.LocalHostIP, 80)})
 	route, err := r.PickRoute(routing_session.AsRoutingContext(ctx))

app/router/strategy_leastping.go

@@ -0,0 +1,61 @@
+package router
+
+import (
+	"context"
+
+	"github.com/xtls/xray-core/app/observatory"
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/extension"
+)
+
+type LeastPingStrategy struct {
+	ctx         context.Context
+	observatory extension.Observatory
+}
+
+func (l *LeastPingStrategy) InjectContext(ctx context.Context) {
+	l.ctx = ctx
+}
+
+func (l *LeastPingStrategy) PickOutbound(strings []string) string {
+	if l.observatory == nil {
+		common.Must(core.RequireFeatures(l.ctx, func(observatory extension.Observatory) error {
+			l.observatory = observatory
+			return nil
+		}))
+	}
+
+	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
+				leastPing = v.Delay
+			}
+		}
+		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/buf/readv_reader.go

@@ -7,9 +7,8 @@ import (
 	"io"
 	"syscall"
 
-	"github.com/xtls/xray-core/features/stats"
-
 	"github.com/xtls/xray-core/common/platform"
+	"github.com/xtls/xray-core/features/stats"
 )
 
 type allocStrategy struct {

common/buf/readv_test.go

@@ -9,7 +9,6 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
-
 	"golang.org/x/sync/errgroup"
 
 	"github.com/xtls/xray-core/common"

common/buf/writer.go

@@ -5,10 +5,9 @@ import (
 	"net"
 	"sync"
 
-	"github.com/xtls/xray-core/features/stats"
-
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/features/stats"
 )
 
 // BufferToBytesWriter is a Writer that writes alloc.Buffer into underlying writer.

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/drain/drain.go

@@ -0,0 +1,10 @@
+package drain
+
+import "io"
+
+//go:generate go run github.com/xtls/xray-core/common/errors/errorgen
+
+type Drainer interface {
+	AcknowledgeReceive(size int)
+	Drain(reader io.Reader) error
+}

common/drain/drainer.go

@@ -0,0 +1,62 @@
+package drain
+
+import (
+	"io"
+	"io/ioutil"
+
+	"github.com/xtls/xray-core/common/dice"
+)
+
+type BehaviorSeedLimitedDrainer struct {
+	DrainSize int
+}
+
+func NewBehaviorSeedLimitedDrainer(behaviorSeed int64, drainFoundation, maxBaseDrainSize, maxRandDrain int) (Drainer, error) {
+	behaviorRand := dice.NewDeterministicDice(behaviorSeed)
+	BaseDrainSize := behaviorRand.Roll(maxBaseDrainSize)
+	RandDrainMax := behaviorRand.Roll(maxRandDrain) + 1
+	RandDrainRolled := dice.Roll(RandDrainMax)
+	DrainSize := drainFoundation + BaseDrainSize + RandDrainRolled
+	return &BehaviorSeedLimitedDrainer{DrainSize: DrainSize}, nil
+}
+
+func (d *BehaviorSeedLimitedDrainer) AcknowledgeReceive(size int) {
+	d.DrainSize -= size
+}
+
+func (d *BehaviorSeedLimitedDrainer) Drain(reader io.Reader) error {
+	if d.DrainSize > 0 {
+		err := drainReadN(reader, d.DrainSize)
+		if err == nil {
+			return newError("drained connection")
+		}
+		return newError("unable to drain connection").Base(err)
+	}
+	return nil
+}
+
+func drainReadN(reader io.Reader, n int) error {
+	_, err := io.CopyN(ioutil.Discard, reader, int64(n))
+	return err
+}
+
+func WithError(drainer Drainer, reader io.Reader, err error) error {
+	drainErr := drainer.Drain(reader)
+	if drainErr == nil {
+		return err
+	}
+	return newError(drainErr).Base(err)
+}
+
+type NopDrainer struct{}
+
+func (n NopDrainer) AcknowledgeReceive(size int) {
+}
+
+func (n NopDrainer) Drain(reader io.Reader) error {
+	return nil
+}
+
+func NewNopDrainer() Drainer {
+	return &NopDrainer{}
+}

common/drain/errors.generated.go

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

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/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

@@ -53,7 +53,8 @@ type Inbound struct {
 // 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 +65,7 @@ type SniffingRequest struct {
 	OverrideDestinationForProtocol []string
 	Enabled                        bool
 	MetadataOnly                   bool
+	RouteOnly                      bool
 }
 
 // Content is the metadata of the connection content.

common/units/bytesize.go

@@ -0,0 +1,100 @@
+package units
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+	"unicode"
+)
+
+var (
+	errInvalidSize = errors.New("invalid size")
+	errInvalidUnit = errors.New("invalid or unsupported unit")
+)
+
+// ByteSize is the size of bytes
+type ByteSize uint64
+
+const (
+	_ = iota
+	// KB = 1KB
+	KB ByteSize = 1 << (10 * iota)
+	// MB = 1MB
+	MB
+	// GB = 1GB
+	GB
+	// TB = 1TB
+	TB
+	// PB = 1PB
+	PB
+	// EB = 1EB
+	EB
+)
+
+func (b ByteSize) String() string {
+	unit := ""
+	value := float64(0)
+	switch {
+	case b == 0:
+		return "0"
+	case b < KB:
+		unit = "B"
+		value = float64(b)
+	case b < MB:
+		unit = "KB"
+		value = float64(b) / float64(KB)
+	case b < GB:
+		unit = "MB"
+		value = float64(b) / float64(MB)
+	case b < TB:
+		unit = "GB"
+		value = float64(b) / float64(GB)
+	case b < PB:
+		unit = "TB"
+		value = float64(b) / float64(TB)
+	case b < EB:
+		unit = "PB"
+		value = float64(b) / float64(PB)
+	default:
+		unit = "EB"
+		value = float64(b) / float64(EB)
+	}
+	result := strconv.FormatFloat(value, 'f', 2, 64)
+	result = strings.TrimSuffix(result, ".0")
+	return result + unit
+}
+
+// Parse parses ByteSize from string
+func (b *ByteSize) Parse(s string) error {
+	s = strings.TrimSpace(s)
+	s = strings.ToUpper(s)
+	i := strings.IndexFunc(s, unicode.IsLetter)
+	if i == -1 {
+		return errInvalidUnit
+	}
+
+	bytesString, multiple := s[:i], s[i:]
+	bytes, err := strconv.ParseFloat(bytesString, 64)
+	if err != nil || bytes <= 0 {
+		return errInvalidSize
+	}
+	switch multiple {
+	case "B":
+		*b = ByteSize(bytes)
+	case "K", "KB", "KIB":
+		*b = ByteSize(bytes * float64(KB))
+	case "M", "MB", "MIB":
+		*b = ByteSize(bytes * float64(MB))
+	case "G", "GB", "GIB":
+		*b = ByteSize(bytes * float64(GB))
+	case "T", "TB", "TIB":
+		*b = ByteSize(bytes * float64(TB))
+	case "P", "PB", "PIB":
+		*b = ByteSize(bytes * float64(PB))
+	case "E", "EB", "EIB":
+		*b = ByteSize(bytes * float64(EB))
+	default:
+		return errInvalidUnit
+	}
+	return nil
+}

common/units/bytesize_test.go

@@ -0,0 +1,66 @@
+package units_test
+
+import (
+	"testing"
+
+	"github.com/xtls/xray-core/common/units"
+)
+
+func TestByteSizes(t *testing.T) {
+	size := units.ByteSize(0)
+	assertSizeString(t, size, "0")
+	size++
+	assertSizeValue(t,
+		assertSizeString(t, size, "1.00B"),
+		size,
+	)
+	size <<= 10
+	assertSizeValue(t,
+		assertSizeString(t, size, "1.00KB"),
+		size,
+	)
+	size <<= 10
+	assertSizeValue(t,
+		assertSizeString(t, size, "1.00MB"),
+		size,
+	)
+	size <<= 10
+	assertSizeValue(t,
+		assertSizeString(t, size, "1.00GB"),
+		size,
+	)
+	size <<= 10
+	assertSizeValue(t,
+		assertSizeString(t, size, "1.00TB"),
+		size,
+	)
+	size <<= 10
+	assertSizeValue(t,
+		assertSizeString(t, size, "1.00PB"),
+		size,
+	)
+	size <<= 10
+	assertSizeValue(t,
+		assertSizeString(t, size, "1.00EB"),
+		size,
+	)
+}
+
+func assertSizeValue(t *testing.T, size string, expected units.ByteSize) {
+	actual := units.ByteSize(0)
+	err := actual.Parse(size)
+	if err != nil {
+		t.Error(err)
+	}
+	if actual != expected {
+		t.Errorf("expect %s, but got %s", expected, actual)
+	}
+}
+
+func assertSizeString(t *testing.T, size units.ByteSize, expected string) string {
+	actual := size.String()
+	if actual != expected {
+		t.Errorf("expect %s, but got %s", expected, actual)
+	}
+	return expected
+}

core/core.go

@@ -18,7 +18,7 @@ import (
 )
 
 var (
-	version  = "1.5.0"
+	version  = "1.5.1"
 	build    = "Custom"
 	codename = "Xray, Penetrates Everything."
 	intro    = "A unified platform for anti-censorship."

core/xray_test.go

@@ -49,8 +49,10 @@ func TestXrayClose(t *testing.T) {
 		Inbound: []*InboundHandlerConfig{
 			{
 				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
-					PortRange: net.SinglePortRange(port),
-					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+					PortList: &net.PortList{
+						Range: []*net.PortRange{net.SinglePortRange(port)},
+					},
+					Listen: net.NewIPOrDomain(net.LocalHostIP),
 				}),
 				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
 					Address: net.NewIPOrDomain(net.LocalHostIP),

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/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 ""
 	}

go.mod

@@ -12,16 +12,17 @@ require (
 	github.com/miekg/dns v1.1.43
 	github.com/pelletier/go-toml v1.9.4
 	github.com/pires/go-proxyproto v0.6.1
-	github.com/refraction-networking/utls v0.0.0-20210713165636-0b2885c8c0d4
+	github.com/refraction-networking/utls v1.0.0
 	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
-	golang.org/x/net v0.0.0-20211020060615-d418f374d309
+	go.starlark.net v0.0.0-20211203141949-70c0e40ae128
+	golang.org/x/crypto v0.0.0-20211209193657-4570a0811e8b
+	golang.org/x/net v0.0.0-20211209124913-491a49abca63
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20211020064051-0ec99a608a1b
-	google.golang.org/grpc v1.41.0
+	golang.org/x/sys v0.0.0-20211214234402-4825e8c3871d
+	google.golang.org/grpc v1.43.0
 	google.golang.org/protobuf v1.27.1
 	h12.io/socks v1.0.3
 )
@@ -37,11 +38,13 @@ 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
+	github.com/stretchr/objx v0.3.0 // 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
+	golang.org/x/tools v0.1.8 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/genproto v0.0.0-20211019152133-63b7e35f4404 // indirect
+	google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect

go.sum

@@ -25,13 +25,15 @@ github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMn
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/cncf/udpa/go v0.0.0-20210930031921-04548b0d99d4/go.mod h1:6pvJx4me5XPnfI9Z40ddWsdw2W/uZgQLFXToKeRcDiI=
 github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
+github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
+github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 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 +142,6 @@ 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 +166,10 @@ 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/refraction-networking/utls v1.0.0 h1:6XQHSjDmeBCF9sPq8p2zMVGq7Ud3rTD2q88Fw8Tz1tA=
+github.com/refraction-networking/utls v1.0.0/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=
@@ -195,13 +200,19 @@ github.com/shurcooL/webdavfs v0.0.0-20170829043945-18c3829fa133/go.mod h1:hKmq5k
 github.com/sourcegraph/annotate v0.0.0-20160123013949-f4cad6c6324d/go.mod h1:UdhH50NIW0fCiwBSr0co2m7BnFLdv4fQTgdqdJTHFeE=
 github.com/sourcegraph/syntaxhighlight v0.0.0-20170531221838-bd320f5d308e/go.mod h1:HuIsMU8RRBOtsCgI77wP899iHVBQpCmg4ErYMZB+2IA=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.3.0 h1:NGXK3lHquSN08v5vWalVI/L8XU9hdzE/G6xsrze47As=
+github.com/stretchr/objx v0.3.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
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 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
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 github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07/go.mod h1:kDXzergiv9cbyO7IOYJZWg1U88JhDg3PB6klq9Hg2pA=
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@@ -211,10 +222,10 @@ 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=
+go.starlark.net v0.0.0-20211203141949-70c0e40ae128 h1:bxH+EXOo87zEOwKDdZ8Tevgi6irRbqheRm/fr293c58=
+go.starlark.net v0.0.0-20211203141949-70c0e40ae128/go.mod h1:t3mmBBPzAVvK0L0n1drDmrQsJ8FoIx4INCqVMTr/Zo0=
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 golang.org/x/build v0.0.0-20190111050920-041ab4dc3f9d/go.mod h1:OWs+y06UdEOHN4y+MfF/py+xQ/tYqIWW03b70/CG9Rw=
 golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -224,21 +235,17 @@ 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=
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-golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
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-golang.org/x/mod v0.5.0 h1:UG21uOlmZabA4fW5i7ZX6bjw1xELEGg/ZLgZq9auk/Q=
-golang.org/x/mod v0.5.0/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
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@@ -260,10 +267,10 @@ 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=
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-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=
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+golang.org/x/net v0.0.0-20211209124913-491a49abca63 h1:iocB37TsdFuN6IBRZ+ry36wrkoV51/tl5vOWqkcPGvY=
+golang.org/x/net v0.0.0-20211209124913-491a49abca63/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181017192945-9dcd33a902f4/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181203162652-d668ce993890/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -301,10 +308,10 @@ 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/sys v0.0.0-20211214234402-4825e8c3871d h1:1oIt9o40TWWI9FUaveVpUvBe13FNqBNVXy3ue2fcfkw=
+golang.org/x/sys v0.0.0-20211214234402-4825e8c3871d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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@@ -325,14 +332,12 @@ 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=
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-golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
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-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=
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+golang.org/x/tools v0.1.8 h1:P1HhGGuLW4aAclzjtmJdf0mJOjVUZUzOTqkAkWL+l6w=
+golang.org/x/tools v0.1.8/go.mod h1:nABZi5QlRsZVlzPpHl034qft6wpY4eDcsTt5AaioBiU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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@@ -353,10 +358,10 @@ 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/genproto v0.0.0-20211208223120-3a66f561d7aa h1:I0YcKz0I7OAhddo7ya8kMnvprhcWM045PmkBdMO9zN0=
+google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v1.14.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.16.0/go.mod h1:0JHn/cJsOMiMfNA9+DeHDlAU7KAAB5GDlYFpa9MZMio=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
@@ -367,8 +372,10 @@ google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
-google.golang.org/grpc v1.41.0 h1:f+PlOh7QV4iIJkPrx5NQ7qaNGFQ3OTse67yaDHfju4E=
-google.golang.org/grpc v1.41.0/go.mod h1:U3l9uK9J0sini8mHphKoXyaqDA/8VyGnDee1zzIUK6k=
+google.golang.org/grpc v1.42.0 h1:XT2/MFpuPFsEX2fWh3YQtHkZ+WYZFQRfaUgLZYj/p6A=
+google.golang.org/grpc v1.42.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
+google.golang.org/grpc v1.43.0 h1:Eeu7bZtDZ2DpRCsLhUlcrLnvYaMK1Gz86a+hMVvELmM=
+google.golang.org/grpc v1.43.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=

infra/conf/api.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/xtls/xray-core/app/commander"
 	loggerservice "github.com/xtls/xray-core/app/log/command"
+	observatoryservice "github.com/xtls/xray-core/app/observatory/command"
 	handlerservice "github.com/xtls/xray-core/app/proxyman/command"
 	statsservice "github.com/xtls/xray-core/app/stats/command"
 	"github.com/xtls/xray-core/common/serial"
@@ -31,6 +32,8 @@ func (c *APIConfig) Build() (*commander.Config, error) {
 			services = append(services, serial.ToTypedMessage(&loggerservice.Config{}))
 		case "statsservice":
 			services = append(services, serial.ToTypedMessage(&statsservice.Config{}))
+		case "observatoryservice":
+			services = append(services, serial.ToTypedMessage(&observatoryservice.Config{}))
 		}
 	}
 

infra/conf/cfgcommon/duration/duration.go

@@ -0,0 +1,33 @@
+package duration
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+type Duration int64
+
+func (d *Duration) MarshalJSON() ([]byte, error) {
+	dr := time.Duration(*d)
+	return json.Marshal(dr.String())
+}
+
+func (d *Duration) UnmarshalJSON(b []byte) error {
+	var v interface{}
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	switch value := v.(type) {
+	case string:
+		var err error
+		dr, err := time.ParseDuration(value)
+		if err != nil {
+			return err
+		}
+		*d = Duration(dr)
+		return nil
+	default:
+		return fmt.Errorf("invalid duration: %v", v)
+	}
+}

infra/conf/cfgcommon/duration/duration_test.go

@@ -0,0 +1,33 @@
+package duration_test
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/xtls/xray-core/infra/conf/cfgcommon/duration"
+)
+
+type testWithDuration struct {
+	Duration duration.Duration
+}
+
+func TestDurationJSON(t *testing.T) {
+	expected := &testWithDuration{
+		Duration: duration.Duration(time.Hour),
+	}
+	data, err := json.Marshal(expected)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	actual := &testWithDuration{}
+	err = json.Unmarshal(data, &actual)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	if actual.Duration != expected.Duration {
+		t.Errorf("expected: %s, actual: %s", time.Duration(expected.Duration), time.Duration(actual.Duration))
+	}
+}

infra/conf/common_test.go

@@ -209,8 +209,7 @@ func TestUserParsing(t *testing.T) {
 	common.Must(json.Unmarshal([]byte(`{
     "id": "96edb838-6d68-42ef-a933-25f7ac3a9d09",
     "email": "love@example.com",
-    "level": 1,
-    "alterId": 100
+    "level": 1
   }`), user))
 
 	nUser := user.Build()

infra/conf/dns.go

@@ -88,7 +88,7 @@ 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/fakedns.go

@@ -68,10 +68,10 @@ func (FakeDNSPostProcessingStage) Process(config *Config) error {
 		}
 
 		switch strings.ToLower(config.DNSConfig.QueryStrategy) {
-			case "useip4", "useipv4", "use_ip4", "use_ipv4", "use_ip_v4", "use-ip4", "use-ipv4", "use-ip-v4":
-				isIPv4Enable, isIPv6Enable = true, false
-			case "useip6", "useipv6", "use_ip6", "use_ipv6", "use_ip_v6", "use-ip6", "use-ipv6", "use-ip-v6":
-				isIPv4Enable, isIPv6Enable = false, true
+		case "useip4", "useipv4", "use_ip4", "use_ipv4", "use_ip_v4", "use-ip4", "use-ipv4", "use-ip-v4":
+			isIPv4Enable, isIPv6Enable = true, false
+		case "useip6", "useipv6", "use_ip6", "use_ipv6", "use_ip_v6", "use-ip6", "use-ipv6", "use-ip-v6":
+			isIPv4Enable, isIPv6Enable = false, true
 		}
 	}
 

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 +1,19 @@
+package conf
+
+import (
+	"github.com/golang/protobuf/proto"
+
+	"github.com/xtls/xray-core/app/observatory"
+	"github.com/xtls/xray-core/infra/conf/cfgcommon/duration"
+)
+
+type ObservatoryConfig struct {
+	SubjectSelector   []string          `json:"subjectSelector"`
+	ProbeURL          string            `json:"probeURL"`
+	ProbeInterval     duration.Duration `json:"probeInterval"`
+	EnableConcurrency bool              `json:"enableConcurrency"`
+}
+
+func (o *ObservatoryConfig) Build() (proto.Message, error) {
+	return &observatory.Config{SubjectSelector: o.SubjectSelector, ProbeUrl: o.ProbeURL, ProbeInterval: int64(o.ProbeInterval), EnableConcurrency: o.EnableConcurrency}, nil
+}

infra/conf/router.go

@@ -18,9 +18,16 @@ type RouterRulesConfig struct {
 	DomainStrategy string            `json:"domainStrategy"`
 }
 
+// StrategyConfig represents a strategy config
+type StrategyConfig struct {
+	Type     string           `json:"type"`
+	Settings *json.RawMessage `json:"settings"`
+}
+
 type BalancingRule struct {
-	Tag       string     `json:"tag"`
-	Selectors StringList `json:"selector"`
+	Tag       string         `json:"tag"`
+	Selectors StringList     `json:"selector"`
+	Strategy  StrategyConfig `json:"strategy"`
 }
 
 func (r *BalancingRule) Build() (*router.BalancingRule, error) {
@@ -31,9 +38,20 @@ func (r *BalancingRule) Build() (*router.BalancingRule, error) {
 		return nil, newError("empty selector list")
 	}
 
+	var strategy string
+	switch strings.ToLower(r.Strategy.Type) {
+	case strategyRandom, "":
+		strategy = strategyRandom
+	case strategyLeastPing:
+		strategy = "leastPing"
+	default:
+		return nil, newError("unknown balancing strategy: " + r.Strategy.Type)
+	}
+
 	return &router.BalancingRule{
 		Tag:              r.Tag,
 		OutboundSelector: []string(r.Selectors),
+		Strategy:         strategy,
 	}, nil
 }
 
@@ -399,21 +417,30 @@ 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 +463,24 @@ 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
@@ -525,7 +562,7 @@ 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 +578,7 @@ 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
 		}
@@ -583,21 +620,21 @@ 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_strategy.go

@@ -0,0 +1,6 @@
+package conf
+
+const (
+	strategyRandom    string = "random"
+	strategyLeastPing string = "leastping"
+)

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) {
@@ -69,6 +107,7 @@ func TestRouterConfig(t *testing.T) {
 					{
 						Tag:              "b1",
 						OutboundSelector: []string{"test"},
+						Strategy:         "random",
 					},
 				},
 				Rule: []*router.RoutingRule{

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/vmess_test.go

@@ -47,8 +47,7 @@ func TestVMessOutbound(t *testing.T) {
 								Email: "love@example.com",
 								Level: 255,
 								Account: serial.ToTypedMessage(&vmess.Account{
-									Id:      "e641f5ad-9397-41e3-bf1a-e8740dfed019",
-									AlterId: 0,
+									Id: "e641f5ad-9397-41e3-bf1a-e8740dfed019",
 									SecuritySettings: &protocol.SecurityConfig{
 										Type: protocol.SecurityType_AUTO,
 									},
@@ -74,14 +73,12 @@ func TestVMessInbound(t *testing.T) {
 					{
 						"id": "27848739-7e62-4138-9fd3-098a63964b6b",
 						"level": 0,
-						"alterId": 16,
 						"email": "love@example.com",
 						"security": "aes-128-gcm"
 					}
 				],
 				"default": {
-					"level": 0,
-					"alterId": 32
+					"level": 0
 				},
 				"detour": {
 					"to": "tag_to_detour"
@@ -95,8 +92,7 @@ func TestVMessInbound(t *testing.T) {
 						Level: 0,
 						Email: "love@example.com",
 						Account: serial.ToTypedMessage(&vmess.Account{
-							Id:      "27848739-7e62-4138-9fd3-098a63964b6b",
-							AlterId: 16,
+							Id: "27848739-7e62-4138-9fd3-098a63964b6b",
 							SecuritySettings: &protocol.SecurityConfig{
 								Type: protocol.SecurityType_AES128_GCM,
 							},
@@ -104,8 +100,7 @@ func TestVMessInbound(t *testing.T) {
 					},
 				},
 				Default: &inbound.DefaultConfig{
-					Level:   0,
-					AlterId: 32,
+					Level: 0,
 				},
 				Detour: &inbound.DetourConfig{
 					To: "tag_to_detour",

infra/conf/xray.go

@@ -2,17 +2,17 @@ package conf
 
 import (
 	"encoding/json"
+	"fmt"
 	"log"
 	"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"
 	core "github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/transport/internet"
 	"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
 }
 
@@ -159,7 +162,7 @@ func (c *InboundDetourAllocationConfig) Build() (*proxyman.AllocationStrategy, e
 
 type InboundDetourConfig struct {
 	Protocol       string                         `json:"protocol"`
-	PortRange      *PortRange                     `json:"port"`
+	PortList       *PortList                      `json:"port"`
 	ListenOn       *Address                       `json:"listen"`
 	Settings       *json.RawMessage               `json:"settings"`
 	Tag            string                         `json:"tag"`
@@ -174,27 +177,27 @@ func (c *InboundDetourConfig) Build() (*core.InboundHandlerConfig, error) {
 	receiverSettings := &proxyman.ReceiverConfig{}
 
 	if c.ListenOn == nil {
-		// Listen on anyip, must set PortRange
-		if c.PortRange == nil {
+		// Listen on anyip, must set PortList
+		if c.PortList == nil {
 			return nil, newError("Listen on AnyIP but no Port(s) set in InboundDetour.")
 		}
-		receiverSettings.PortRange = c.PortRange.Build()
+		receiverSettings.PortList = c.PortList.Build()
 	} else {
 		// Listen on specific IP or Unix Domain Socket
 		receiverSettings.Listen = c.ListenOn.Build()
 		listenDS := c.ListenOn.Family().IsDomain() && (c.ListenOn.Domain()[0] == '/' || c.ListenOn.Domain()[0] == '@')
 		listenIP := c.ListenOn.Family().IsIP() || (c.ListenOn.Family().IsDomain() && c.ListenOn.Domain() == "localhost")
 		if listenIP {
-			// Listen on specific IP, must set PortRange
-			if c.PortRange == nil {
+			// Listen on specific IP, must set PortList
+			if c.PortList == nil {
 				return nil, newError("Listen on specific ip without port in InboundDetour.")
 			}
 			// Listen on IP:Port
-			receiverSettings.PortRange = c.PortRange.Build()
+			receiverSettings.PortList = c.PortList.Build()
 		} else if listenDS {
-			if c.PortRange != nil {
-				// Listen on Unix Domain Socket, PortRange should be nil
-				receiverSettings.PortRange = nil
+			if c.PortList != nil {
+				// Listen on Unix Domain Socket, PortList should be nil
+				receiverSettings.PortList = nil
 			}
 		} else {
 			return nil, newError("unable to listen on domain address: ", c.ListenOn.Domain())
@@ -206,9 +209,17 @@ func (c *InboundDetourConfig) Build() (*core.InboundHandlerConfig, error) {
 		if c.Allocation.Concurrency != nil && c.Allocation.Strategy == "random" {
 			concurrency = int(*c.Allocation.Concurrency)
 		}
-		portRange := int(c.PortRange.To - c.PortRange.From + 1)
+		portRange := 0
+
+		for _, pr := range c.PortList.Range {
+			portRange += int(pr.To - pr.From + 1)
+		}
 		if concurrency >= 0 && concurrency >= portRange {
-			return nil, newError("not enough ports. concurrency = ", concurrency, " ports: ", c.PortRange.From, " - ", c.PortRange.To)
+			var ports strings.Builder
+			for _, pr := range c.PortList.Range {
+				fmt.Fprintf(&ports, "%d-%d ", pr.From, pr.To)
+			}
+			return nil, newError("not enough ports. concurrency = ", concurrency, " ports: ", ports.String())
 		}
 
 		as, err := c.Allocation.Build()
@@ -403,6 +414,7 @@ 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 {
@@ -460,6 +472,10 @@ func (c *Config) Override(o *Config, fn string) {
 		c.FakeDNS = o.FakeDNS
 	}
 
+	if o.Observatory != nil {
+		c.Observatory = o.Observatory
+	}
+
 	// deprecated attrs... keep them for now
 	if o.InboundConfig != nil {
 		c.InboundConfig = o.InboundConfig
@@ -609,6 +625,14 @@ 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 {
@@ -624,11 +648,11 @@ func (c *Config) Build() (*core.Config, error) {
 	}
 
 	// Backward compatibility.
-	if len(inbounds) > 0 && inbounds[0].PortRange == nil && c.Port > 0 {
-		inbounds[0].PortRange = &PortRange{
+	if len(inbounds) > 0 && inbounds[0].PortList == nil && c.Port > 0 {
+		inbounds[0].PortList = &PortList{[]PortRange{{
 			From: uint32(c.Port),
 			To:   uint32(c.Port),
-		}
+		}}}
 	}
 
 	for _, rawInboundConfig := range inbounds {

infra/conf/xray_test.go

@@ -72,7 +72,6 @@ func TestXrayConfig(t *testing.T) {
 					"settings": {
 						"clients": [
 							{
-								"alterId": 100,
 								"security": "aes-128-gcm",
 								"id": "0cdf8a45-303d-4fed-9780-29aa7f54175e"
 							}
@@ -102,7 +101,6 @@ func TestXrayConfig(t *testing.T) {
 					"settings": {
 						"clients": [
 							{
-								"alterId": 100,
 								"security": "aes-128-gcm",
 								"id": "0cdf8a45-303d-4fed-9780-29aa7f54175e"
 							}
@@ -231,10 +229,7 @@ func TestXrayConfig(t *testing.T) {
 				Inbound: []*core.InboundHandlerConfig{
 					{
 						ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
-							PortRange: &net.PortRange{
-								From: 443,
-								To:   443,
-							},
+							PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(443)}},
 							StreamSettings: &internet.StreamConfig{
 								ProtocolName: "websocket",
 								TransportSettings: []*internet.TransportConfig{
@@ -269,8 +264,7 @@ func TestXrayConfig(t *testing.T) {
 								{
 									Level: 0,
 									Account: serial.ToTypedMessage(&vmess.Account{
-										Id:      "0cdf8a45-303d-4fed-9780-29aa7f54175e",
-										AlterId: 100,
+										Id: "0cdf8a45-303d-4fed-9780-29aa7f54175e",
 										SecuritySettings: &protocol.SecurityConfig{
 											Type: protocol.SecurityType_AES128_GCM,
 										},
@@ -281,10 +275,10 @@ func TestXrayConfig(t *testing.T) {
 					},
 					{
 						ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
-							PortRange: &net.PortRange{
+							PortList: &net.PortList{Range: []*net.PortRange{{
 								From: 443,
 								To:   500,
-							},
+							}}},
 							AllocationStrategy: &proxyman.AllocationStrategy{
 								Type: proxyman.AllocationStrategy_Random,
 								Concurrency: &proxyman.AllocationStrategy_AllocationStrategyConcurrency{
@@ -325,8 +319,7 @@ func TestXrayConfig(t *testing.T) {
 								{
 									Level: 0,
 									Account: serial.ToTypedMessage(&vmess.Account{
-										Id:      "0cdf8a45-303d-4fed-9780-29aa7f54175e",
-										AlterId: 100,
+										Id: "0cdf8a45-303d-4fed-9780-29aa7f54175e",
 										SecuritySettings: &protocol.SecurityConfig{
 											Type: protocol.SecurityType_AES128_GCM,
 										},

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

@@ -14,6 +14,9 @@ import (
 	_ "github.com/xtls/xray-core/app/proxyman/command"
 	_ "github.com/xtls/xray-core/app/stats/command"
 
+	// Developer preview services
+	_ "github.com/xtls/xray-core/app/observatory/command"
+
 	// Other optional features.
 	_ "github.com/xtls/xray-core/app/dns"
 	_ "github.com/xtls/xray-core/app/dns/fakedns"
@@ -23,12 +26,19 @@ 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"
+
+	// Developer preview features
+	_ "github.com/xtls/xray-core/app/observatory"
+
 	// 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/loopback"
 	_ "github.com/xtls/xray-core/proxy/mtproto"
 	_ "github.com/xtls/xray-core/proxy/shadowsocks"
 	_ "github.com/xtls/xray-core/proxy/socks"

proxy/dns/dns.go

@@ -6,8 +6,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"golang.org/x/net/dns/dnsmessage"
 
 	"github.com/xtls/xray-core/common"
@@ -22,6 +20,7 @@ import (
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 func init() {

proxy/dns/dns_test.go

@@ -117,8 +117,8 @@ func TestUDPDNSTunnel(t *testing.T) {
 					Networks: []net.Network{net.Network_UDP},
 				}),
 				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
-					PortRange: net.SinglePortRange(serverPort),
-					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(serverPort)}},
+					Listen:   net.NewIPOrDomain(net.LocalHostIP),
 				}),
 			},
 		},
@@ -236,8 +236,8 @@ func TestTCPDNSTunnel(t *testing.T) {
 					Networks: []net.Network{net.Network_TCP},
 				}),
 				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
-					PortRange: net.SinglePortRange(serverPort),
-					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(serverPort)}},
+					Listen:   net.NewIPOrDomain(net.LocalHostIP),
 				}),
 			},
 		},
@@ -322,8 +322,8 @@ func TestUDP2TCPDNSTunnel(t *testing.T) {
 					Networks: []net.Network{net.Network_TCP},
 				}),
 				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
-					PortRange: net.SinglePortRange(serverPort),
-					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(serverPort)}},
+					Listen:   net.NewIPOrDomain(net.LocalHostIP),
 				}),
 			},
 		},

proxy/dokodemo/dokodemo.go

@@ -7,8 +7,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/log"
@@ -20,6 +18,7 @@ import (
 	"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/transport/internet/stat"
 )
 
 func init() {

proxy/freedom/freedom.go

@@ -6,8 +6,6 @@ import (
 	"context"
 	"time"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/dice"
@@ -22,6 +20,7 @@ import (
 	"github.com/xtls/xray-core/features/stats"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 func init() {

proxy/http/client.go

@@ -9,8 +9,6 @@ import (
 	"net/url"
 	"sync"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"golang.org/x/net/http2"
 
 	"github.com/xtls/xray-core/common"
@@ -26,6 +24,7 @@ import (
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
 )
 

proxy/http/server.go

@@ -9,8 +9,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -24,6 +22,7 @@ import (
 	"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/transport/internet/stat"
 )
 
 // Server is an HTTP proxy server.

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

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

proxy/loopback/loopback.go

@@ -0,0 +1,121 @@
+package loopback
+
+import (
+	"context"
+
+	"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/net/cnc"
+	"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/mtproto/server.go

@@ -5,8 +5,6 @@ import (
 	"context"
 	"time"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/crypto"
@@ -18,6 +16,7 @@ import (
 	"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/transport/internet/stat"
 )
 
 var dcList = []net.Address{

proxy/proxy.go

@@ -8,13 +8,12 @@ package proxy
 import (
 	"context"
 
-	"github.com/xtls/xray-core/transport/internet/stat"
-
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 // An Inbound processes inbound connections.