Added experiment to avoid sending the termination signal

(cherry picked from commit c5357e1f000054ba5836468922cae52a830c8019)

app/dns/dnscommon.go

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

app/dns/nameserver_doh.go

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

app/observatory/observer.go

@@ -32,6 +32,8 @@ type Observer struct {
 	finished *done.Instance
 
 	ohm outbound.Manager
+
+	StatusUpdate func(result *OutboundStatus)
 }
 
 func (o *Observer) GetObservation(ctx context.Context) (proto.Message, error) {
@@ -183,6 +185,10 @@ func (o *Observer) updateStatusForResult(outbound string, result *ProbeResult) {
 		status.LastErrorReason = result.LastErrorReason
 		status.Delay = 99999999
 	}
+
+	if o.StatusUpdate != nil {
+		o.StatusUpdate(status)
+	}
 }
 
 func (o *Observer) findStatusLocationLockHolderOnly(outbound string) int {

app/observatory/persist.go

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

app/proxyman/config.pb.go

@@ -69,6 +69,64 @@ func (KnownProtocols) EnumDescriptor() ([]byte, []int) {
 	return file_app_proxyman_config_proto_rawDescGZIP(), []int{0}
 }
 
+type DomainStrategy int32
+
+const (
+	DomainStrategy_AS_IS      DomainStrategy = 0
+	DomainStrategy_USE_IP     DomainStrategy = 1
+	DomainStrategy_USE_IP4    DomainStrategy = 2
+	DomainStrategy_USE_IP6    DomainStrategy = 3
+	DomainStrategy_PREFER_IP4 DomainStrategy = 4
+	DomainStrategy_PREFER_IP6 DomainStrategy = 5
+)
+
+// Enum value maps for DomainStrategy.
+var (
+	DomainStrategy_name = map[int32]string{
+		0: "AS_IS",
+		1: "USE_IP",
+		2: "USE_IP4",
+		3: "USE_IP6",
+		4: "PREFER_IP4",
+		5: "PREFER_IP6",
+	}
+	DomainStrategy_value = map[string]int32{
+		"AS_IS":      0,
+		"USE_IP":     1,
+		"USE_IP4":    2,
+		"USE_IP6":    3,
+		"PREFER_IP4": 4,
+		"PREFER_IP6": 5,
+	}
+)
+
+func (x DomainStrategy) Enum() *DomainStrategy {
+	p := new(DomainStrategy)
+	*p = x
+	return p
+}
+
+func (x DomainStrategy) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (DomainStrategy) Descriptor() protoreflect.EnumDescriptor {
+	return file_app_proxyman_config_proto_enumTypes[1].Descriptor()
+}
+
+func (DomainStrategy) Type() protoreflect.EnumType {
+	return &file_app_proxyman_config_proto_enumTypes[1]
+}
+
+func (x DomainStrategy) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use DomainStrategy.Descriptor instead.
+func (DomainStrategy) EnumDescriptor() ([]byte, []int) {
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{1}
+}
+
 type AllocationStrategy_Type int32
 
 const (
@@ -105,11 +163,11 @@ func (x AllocationStrategy_Type) String() string {
 }
 
 func (AllocationStrategy_Type) Descriptor() protoreflect.EnumDescriptor {
-	return file_app_proxyman_config_proto_enumTypes[1].Descriptor()
+	return file_app_proxyman_config_proto_enumTypes[2].Descriptor()
 }
 
 func (AllocationStrategy_Type) Type() protoreflect.EnumType {
-	return &file_app_proxyman_config_proto_enumTypes[1]
+	return &file_app_proxyman_config_proto_enumTypes[2]
 }
 
 func (x AllocationStrategy_Type) Number() protoreflect.EnumNumber {
@@ -523,6 +581,7 @@ type SenderConfig struct {
 	StreamSettings    *internet.StreamConfig `protobuf:"bytes,2,opt,name=stream_settings,json=streamSettings,proto3" json:"stream_settings,omitempty"`
 	ProxySettings     *internet.ProxyConfig  `protobuf:"bytes,3,opt,name=proxy_settings,json=proxySettings,proto3" json:"proxy_settings,omitempty"`
 	MultiplexSettings *MultiplexingConfig    `protobuf:"bytes,4,opt,name=multiplex_settings,json=multiplexSettings,proto3" json:"multiplex_settings,omitempty"`
+	DomainStrategy    DomainStrategy         `protobuf:"varint,5,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.app.proxyman.DomainStrategy" json:"domain_strategy,omitempty"`
 }
 
 func (x *SenderConfig) Reset() {
@@ -585,6 +644,13 @@ func (x *SenderConfig) GetMultiplexSettings() *MultiplexingConfig {
 	return nil
 }
 
+func (x *SenderConfig) GetDomainStrategy() DomainStrategy {
+	if x != nil {
+		return x.DomainStrategy
+	}
+	return DomainStrategy_AS_IS
+}
+
 type MultiplexingConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -836,7 +902,7 @@ var file_app_proxyman_config_proto_rawDesc = []byte{
 	0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x73, 0x65, 0x72, 0x69, 0x61, 0x6c, 0x2e, 0x54,
 	0x79, 0x70, 0x65, 0x64, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x52, 0x0d, 0x70, 0x72, 0x6f,
 	0x78, 0x79, 0x53, 0x65, 0x74, 0x74, 0x69, 0x6e, 0x67, 0x73, 0x22, 0x10, 0x0a, 0x0e, 0x4f, 0x75,
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+	0x74, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x22, 0xfc, 0x02, 0x0a,
 	0x0c, 0x53, 0x65, 0x6e, 0x64, 0x65, 0x72, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x2d, 0x0a,
 	0x03, 0x76, 0x69, 0x61, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1b, 0x2e, 0x78, 0x72, 0x61,
 	0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x6e, 0x65, 0x74, 0x2e, 0x49, 0x50, 0x4f,
@@ -855,21 +921,32 @@ var file_app_proxyman_config_proto_rawDesc = []byte{
 	0x04, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x25, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70,
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+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -884,48 +961,50 @@ func file_app_proxyman_config_proto_rawDescGZIP() []byte {
 	return file_app_proxyman_config_proto_rawDescData
 }
 
-var file_app_proxyman_config_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
+var file_app_proxyman_config_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
 var file_app_proxyman_config_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
 var file_app_proxyman_config_proto_goTypes = []interface{}{
 	(KnownProtocols)(0),                                      // 0: xray.app.proxyman.KnownProtocols
-	(AllocationStrategy_Type)(0),                             // 1: xray.app.proxyman.AllocationStrategy.Type
+	(DomainStrategy)(0),                                      // 1: xray.app.proxyman.DomainStrategy
-	(*InboundConfig)(nil),                                    // 2: xray.app.proxyman.InboundConfig
+	(AllocationStrategy_Type)(0),                             // 2: xray.app.proxyman.AllocationStrategy.Type
-	(*AllocationStrategy)(nil),                               // 3: xray.app.proxyman.AllocationStrategy
+	(*InboundConfig)(nil),                                    // 3: xray.app.proxyman.InboundConfig
-	(*SniffingConfig)(nil),                                   // 4: xray.app.proxyman.SniffingConfig
+	(*AllocationStrategy)(nil),                               // 4: xray.app.proxyman.AllocationStrategy
-	(*ReceiverConfig)(nil),                                   // 5: xray.app.proxyman.ReceiverConfig
+	(*SniffingConfig)(nil),                                   // 5: xray.app.proxyman.SniffingConfig
-	(*InboundHandlerConfig)(nil),                             // 6: xray.app.proxyman.InboundHandlerConfig
+	(*ReceiverConfig)(nil),                                   // 6: xray.app.proxyman.ReceiverConfig
-	(*OutboundConfig)(nil),                                   // 7: xray.app.proxyman.OutboundConfig
+	(*InboundHandlerConfig)(nil),                             // 7: xray.app.proxyman.InboundHandlerConfig
-	(*SenderConfig)(nil),                                     // 8: xray.app.proxyman.SenderConfig
+	(*OutboundConfig)(nil),                                   // 8: xray.app.proxyman.OutboundConfig
-	(*MultiplexingConfig)(nil),                               // 9: xray.app.proxyman.MultiplexingConfig
+	(*SenderConfig)(nil),                                     // 9: xray.app.proxyman.SenderConfig
-	(*AllocationStrategy_AllocationStrategyConcurrency)(nil), // 10: xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
+	(*MultiplexingConfig)(nil),                               // 10: xray.app.proxyman.MultiplexingConfig
-	(*AllocationStrategy_AllocationStrategyRefresh)(nil),     // 11: xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
+	(*AllocationStrategy_AllocationStrategyConcurrency)(nil), // 11: xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
-	(*net.PortRange)(nil),                                    // 12: xray.common.net.PortRange
+	(*AllocationStrategy_AllocationStrategyRefresh)(nil),     // 12: xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
-	(*net.IPOrDomain)(nil),                                   // 13: xray.common.net.IPOrDomain
+	(*net.PortRange)(nil),                                    // 13: xray.common.net.PortRange
-	(*internet.StreamConfig)(nil),                            // 14: xray.transport.internet.StreamConfig
+	(*net.IPOrDomain)(nil),                                   // 14: xray.common.net.IPOrDomain
-	(*serial.TypedMessage)(nil),                              // 15: xray.common.serial.TypedMessage
+	(*internet.StreamConfig)(nil),                            // 15: xray.transport.internet.StreamConfig
-	(*internet.ProxyConfig)(nil),                             // 16: xray.transport.internet.ProxyConfig
+	(*serial.TypedMessage)(nil),                              // 16: xray.common.serial.TypedMessage
+	(*internet.ProxyConfig)(nil),                             // 17: xray.transport.internet.ProxyConfig
 }
 var file_app_proxyman_config_proto_depIdxs = []int32{
-	1,  // 0: xray.app.proxyman.AllocationStrategy.type:type_name -> xray.app.proxyman.AllocationStrategy.Type
+	2,  // 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, // 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, // 2: xray.app.proxyman.AllocationStrategy.refresh:type_name -> xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
-	12, // 3: xray.app.proxyman.ReceiverConfig.port_range:type_name -> xray.common.net.PortRange
+	13, // 3: xray.app.proxyman.ReceiverConfig.port_range:type_name -> xray.common.net.PortRange
-	13, // 4: xray.app.proxyman.ReceiverConfig.listen:type_name -> xray.common.net.IPOrDomain
+	14, // 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
+	4,  // 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
+	15, // 6: xray.app.proxyman.ReceiverConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
 	0,  // 7: xray.app.proxyman.ReceiverConfig.domain_override:type_name -> xray.app.proxyman.KnownProtocols
-	4,  // 8: xray.app.proxyman.ReceiverConfig.sniffing_settings:type_name -> xray.app.proxyman.SniffingConfig
+	5,  // 8: xray.app.proxyman.ReceiverConfig.sniffing_settings:type_name -> xray.app.proxyman.SniffingConfig
-	15, // 9: xray.app.proxyman.InboundHandlerConfig.receiver_settings:type_name -> xray.common.serial.TypedMessage
+	16, // 9: xray.app.proxyman.InboundHandlerConfig.receiver_settings:type_name -> xray.common.serial.TypedMessage
-	15, // 10: xray.app.proxyman.InboundHandlerConfig.proxy_settings:type_name -> xray.common.serial.TypedMessage
+	16, // 10: xray.app.proxyman.InboundHandlerConfig.proxy_settings:type_name -> xray.common.serial.TypedMessage
-	13, // 11: xray.app.proxyman.SenderConfig.via:type_name -> xray.common.net.IPOrDomain
+	14, // 11: xray.app.proxyman.SenderConfig.via:type_name -> xray.common.net.IPOrDomain
-	14, // 12: xray.app.proxyman.SenderConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
+	15, // 12: xray.app.proxyman.SenderConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
-	16, // 13: xray.app.proxyman.SenderConfig.proxy_settings:type_name -> xray.transport.internet.ProxyConfig
+	17, // 13: xray.app.proxyman.SenderConfig.proxy_settings:type_name -> xray.transport.internet.ProxyConfig
-	9,  // 14: xray.app.proxyman.SenderConfig.multiplex_settings:type_name -> xray.app.proxyman.MultiplexingConfig
+	10, // 14: xray.app.proxyman.SenderConfig.multiplex_settings:type_name -> xray.app.proxyman.MultiplexingConfig
-	15, // [15:15] is the sub-list for method output_type
+	1,  // 15: xray.app.proxyman.SenderConfig.domain_strategy:type_name -> xray.app.proxyman.DomainStrategy
-	15, // [15:15] is the sub-list for method input_type
+	16, // [16:16] is the sub-list for method output_type
-	15, // [15:15] is the sub-list for extension type_name
+	16, // [16:16] is the sub-list for method input_type
-	15, // [15:15] is the sub-list for extension extendee
+	16, // [16:16] is the sub-list for extension type_name
-	0,  // [0:15] is the sub-list for field type_name
+	16, // [16:16] is the sub-list for extension extendee
+	0,  // [0:16] is the sub-list for field type_name
 }
 
 func init() { file_app_proxyman_config_proto_init() }
@@ -1060,7 +1139,7 @@ func file_app_proxyman_config_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_proxyman_config_proto_rawDesc,
-			NumEnums:      2,
+			NumEnums:      3,
 			NumMessages:   10,
 			NumExtensions: 0,
 			NumServices:   0,

app/proxyman/config.proto

@@ -88,12 +88,22 @@ message InboundHandlerConfig {
 
 message OutboundConfig {}
 
+enum DomainStrategy {
+  AS_IS = 0;
+  USE_IP = 1;
+  USE_IP4 = 2;
+  USE_IP6 = 3;
+  PREFER_IP4 = 4;
+  PREFER_IP6 = 5;
+}
+
 message SenderConfig {
   // Send traffic through the given IP. Only IP is allowed.
   xray.common.net.IPOrDomain via = 1;
   xray.transport.internet.StreamConfig stream_settings = 2;
   xray.transport.internet.ProxyConfig proxy_settings = 3;
   MultiplexingConfig multiplex_settings = 4;
+  DomainStrategy domain_strategy = 5;
 }
 
 message MultiplexingConfig {

app/proxyman/outbound/handler.go

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

app/router/command/config.go

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

app/router/condition.go

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

app/router/config.go

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

app/router/config.pb.go

@@ -519,6 +519,8 @@ type RoutingRule struct {
 	Protocol       []string      `protobuf:"bytes,9,rep,name=protocol,proto3" json:"protocol,omitempty"`
 	Attributes     string        `protobuf:"bytes,15,opt,name=attributes,proto3" json:"attributes,omitempty"`
 	DomainMatcher  string        `protobuf:"bytes,17,opt,name=domain_matcher,json=domainMatcher,proto3" json:"domain_matcher,omitempty"`
+	UidList        *net.UidList  `protobuf:"bytes,18,opt,name=uid_list,json=uidList,proto3" json:"uid_list,omitempty"`
+	AppStatus      []string      `protobuf:"bytes,19,rep,name=app_status,json=appStatus,proto3" json:"app_status,omitempty"`
 }
 
 func (x *RoutingRule) Reset() {
@@ -683,6 +685,20 @@ func (x *RoutingRule) GetDomainMatcher() string {
 	return ""
 }
 
+func (x *RoutingRule) GetUidList() *net.UidList {
+	if x != nil {
+		return x.UidList
+	}
+	return nil
+}
+
+func (x *RoutingRule) GetAppStatus() []string {
+	if x != nil {
+		return x.AppStatus
+	}
+	return nil
+}
+
 type isRoutingRule_TargetTag interface {
 	isRoutingRule_TargetTag()
 }
@@ -923,133 +939,139 @@ var file_app_router_config_proto_rawDesc = []byte{
 	0x61, 0x70, 0x70, 0x2e, 0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x1a, 0x15, 0x63, 0x6f, 0x6d, 0x6d,
 	0x6f, 0x6e, 0x2f, 0x6e, 0x65, 0x74, 0x2f, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74,
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-	0x33,
 }
 
 var (
@@ -1083,6 +1105,7 @@ var file_app_router_config_proto_goTypes = []interface{}{
 	(*net.PortList)(nil),       // 13: xray.common.net.PortList
 	(*net.NetworkList)(nil),    // 14: xray.common.net.NetworkList
 	(net.Network)(0),           // 15: xray.common.net.Network
+	(*net.UidList)(nil),        // 16: xray.common.net.UidList
 }
 var file_app_router_config_proto_depIdxs = []int32{
 	0,  // 0: xray.app.router.Domain.type:type_name -> xray.app.router.Domain.Type
@@ -1101,14 +1124,15 @@ var file_app_router_config_proto_depIdxs = []int32{
 	3,  // 13: xray.app.router.RoutingRule.source_cidr:type_name -> xray.app.router.CIDR
 	4,  // 14: xray.app.router.RoutingRule.source_geoip:type_name -> xray.app.router.GeoIP
 	13, // 15: xray.app.router.RoutingRule.source_port_list:type_name -> xray.common.net.PortList
-	1,  // 16: xray.app.router.Config.domain_strategy:type_name -> xray.app.router.Config.DomainStrategy
+	16, // 16: xray.app.router.RoutingRule.uid_list:type_name -> xray.common.net.UidList
-	8,  // 17: xray.app.router.Config.rule:type_name -> xray.app.router.RoutingRule
+	1,  // 17: xray.app.router.Config.domain_strategy:type_name -> xray.app.router.Config.DomainStrategy
-	9,  // 18: xray.app.router.Config.balancing_rule:type_name -> xray.app.router.BalancingRule
+	8,  // 18: xray.app.router.Config.rule:type_name -> xray.app.router.RoutingRule
-	19, // [19:19] is the sub-list for method output_type
+	9,  // 19: xray.app.router.Config.balancing_rule:type_name -> xray.app.router.BalancingRule
-	19, // [19:19] is the sub-list for method input_type
+	20, // [20:20] is the sub-list for method output_type
-	19, // [19:19] is the sub-list for extension type_name
+	20, // [20:20] is the sub-list for method input_type
-	19, // [19:19] is the sub-list for extension extendee
+	20, // [20:20] is the sub-list for extension type_name
-	0,  // [0:19] is the sub-list for field type_name
+	20, // [20:20] is the sub-list for extension extendee
+	0,  // [0:20] is the sub-list for field type_name
 }
 
 func init() { file_app_router_config_proto_init() }

app/router/config.proto

@@ -8,6 +8,7 @@ option java_multiple_files = true;
 
 import "common/net/port.proto";
 import "common/net/network.proto";
+import "common/net/uid.proto";
 
 // Domain for routing decision.
 message Domain {
@@ -122,6 +123,10 @@ message RoutingRule {
   string attributes = 15;
 
   string domain_matcher = 17;
+
+  xray.common.net.UidList uid_list = 18;
+  repeated string app_status = 19;
+
 }
 
 message BalancingRule {

common/net/uid.pb.go

@@ -0,0 +1,148 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
+// source: common/net/uid.proto
+
+package net
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// UidList represents a list of uid.
+type UidList struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The port that this range starts from.
+	Uid []uint32 `protobuf:"varint,1,rep,packed,name=uid,proto3" json:"uid,omitempty"`
+}
+
+func (x *UidList) Reset() {
+	*x = UidList{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_common_net_uid_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *UidList) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*UidList) ProtoMessage() {}
+
+func (x *UidList) ProtoReflect() protoreflect.Message {
+	mi := &file_common_net_uid_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use UidList.ProtoReflect.Descriptor instead.
+func (*UidList) Descriptor() ([]byte, []int) {
+	return file_common_net_uid_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *UidList) GetUid() []uint32 {
+	if x != nil {
+		return x.Uid
+	}
+	return nil
+}
+
+var File_common_net_uid_proto protoreflect.FileDescriptor
+
+var file_common_net_uid_proto_rawDesc = []byte{
+	0x0a, 0x14, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x6e, 0x65, 0x74, 0x2f, 0x75, 0x69, 0x64,
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+	0x73, 0x74, 0x12, 0x10, 0x0a, 0x03, 0x75, 0x69, 0x64, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0d, 0x52,
+	0x03, 0x75, 0x69, 0x64, 0x42, 0x4f, 0x0a, 0x13, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79,
+	0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x6e, 0x65, 0x74, 0x50, 0x01, 0x5a, 0x24, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78,
+	0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f,
+	0x6e, 0x65, 0x74, 0xaa, 0x02, 0x0f, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x6f,
+	0x6e, 0x2e, 0x4e, 0x65, 0x74, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_common_net_uid_proto_rawDescOnce sync.Once
+	file_common_net_uid_proto_rawDescData = file_common_net_uid_proto_rawDesc
+)
+
+func file_common_net_uid_proto_rawDescGZIP() []byte {
+	file_common_net_uid_proto_rawDescOnce.Do(func() {
+		file_common_net_uid_proto_rawDescData = protoimpl.X.CompressGZIP(file_common_net_uid_proto_rawDescData)
+	})
+	return file_common_net_uid_proto_rawDescData
+}
+
+var file_common_net_uid_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_common_net_uid_proto_goTypes = []interface{}{
+	(*UidList)(nil), // 0: xray.common.net.UidList
+}
+var file_common_net_uid_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_common_net_uid_proto_init() }
+func file_common_net_uid_proto_init() {
+	if File_common_net_uid_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_common_net_uid_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*UidList); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_common_net_uid_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_common_net_uid_proto_goTypes,
+		DependencyIndexes: file_common_net_uid_proto_depIdxs,
+		MessageInfos:      file_common_net_uid_proto_msgTypes,
+	}.Build()
+	File_common_net_uid_proto = out.File
+	file_common_net_uid_proto_rawDesc = nil
+	file_common_net_uid_proto_goTypes = nil
+	file_common_net_uid_proto_depIdxs = nil
+}

common/net/uid.proto

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

common/protocol/headers.go

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

common/session/session.go

@@ -48,6 +48,13 @@ type Inbound struct {
 	Conn net.Conn
 	// Timer of the inbound buf copier. May be nil.
 	Timer *signal.ActivityTimer
+
+	// Uid is the unix user id for the inbound connection
+	Uid uint32
+	// SagerNet private: AppStatus is the android app's status for the inbound connection
+	AppStatus []string
+	// SagerNet private
+	SkipFakeDNS bool
 }
 
 // Outbound is the metadata of an outbound connection.

core/context.go

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

core/functions.go

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

features/routing/context.go

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

features/routing/session/context.go

@@ -122,6 +122,28 @@ func (ctx *Context) GetSkipDNSResolve() bool {
 	return ctx.Content.SkipDNSResolve
 }
 
+// GetUid implements routing.Context.
+func (ctx *Context) GetUid() uint32 {
+	if ctx.Inbound == nil {
+		return 0
+	}
+	return ctx.Inbound.Uid
+}
+
+func (ctx *Context) GetAppStatus() []string {
+	if ctx.Inbound == nil {
+		return nil
+	}
+	return ctx.Inbound.AppStatus
+}
+
+func (ctx Context) GetSkipFakeDNS() bool {
+	if ctx.Inbound == nil {
+		return false
+	}
+	return ctx.Inbound.SkipFakeDNS
+}
+
 // AsRoutingContext creates a context from context.context with session info.
 func AsRoutingContext(ctx context.Context) routing.Context {
 	return &Context{

infra/conf/common.go

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

infra/conf/dns.go

@@ -3,6 +3,7 @@ package conf
 import (
 	"encoding/json"
 	"sort"
+	"strconv"
 	"strings"
 
 	"github.com/xtls/xray-core/app/dns"
@@ -19,13 +20,11 @@ type NameServerConfig struct {
 	ExpectIPs    StringList
 }
 
-func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
+func (c *NameServerConfig) UnmarshalJSON(data []byte) (err error) {
 	var address Address
-	if err := json.Unmarshal(data, &address); err == nil {
+	if err = json.Unmarshal(data, &address); err == nil {
 		c.Address = &address
-		return nil
+	} else {
-	}
-
 		var advanced struct {
 			Address      *Address   `json:"address"`
 			ClientIP     *Address   `json:"clientIp"`
@@ -34,13 +33,26 @@ func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
 			Domains      []string   `json:"domains"`
 			ExpectIPs    StringList `json:"expectIps"`
 		}
-	if err := json.Unmarshal(data, &advanced); err == nil {
+		if err = json.Unmarshal(data, &advanced); err == nil {
 			c.Address = advanced.Address
 			c.ClientIP = advanced.ClientIP
 			c.Port = advanced.Port
 			c.SkipFallback = advanced.SkipFallback
 			c.Domains = advanced.Domains
 			c.ExpectIPs = advanced.ExpectIPs
+		}
+	}
+
+	if err == nil {
+		if c.Port == 0 && c.Address.Family().IsDomain() {
+			if host, port, err := net.SplitHostPort(c.Address.Domain()); err == nil {
+				port, err := strconv.Atoi(port)
+				if err == nil {
+					c.Address = &Address{Address: net.ParseAddress(host)}
+					c.Port = uint16(port)
+				}
+			}
+		}
 		return nil
 	}
 

infra/conf/router.go

@@ -498,6 +498,8 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		InboundTag *StringList  `json:"inboundTag"`
 		Protocols  *StringList  `json:"protocol"`
 		Attributes string       `json:"attrs"`
+		UidList    *UidList     `json:"uidList"`
+		AppStatus  *StringList  `json:"appStatus"`
 	}
 	rawFieldRule := new(RawFieldRule)
 	err := json.Unmarshal(msg, rawFieldRule)
@@ -593,6 +595,16 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		rule.Attributes = rawFieldRule.Attributes
 	}
 
+	if rawFieldRule.UidList != nil && len(*rawFieldRule.UidList) > 0 {
+		rule.UidList = rawFieldRule.UidList.Build()
+	}
+
+	if rawFieldRule.AppStatus != nil && rawFieldRule.AppStatus.Len() > 0 {
+		for _, s := range *rawFieldRule.AppStatus {
+			rule.AppStatus = append(rule.AppStatus, s)
+		}
+	}
+
 	return rule, nil
 }
 

infra/conf/serial/builder.go

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

infra/conf/serial/loader.go

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

infra/conf/vmess.go

@@ -18,6 +18,7 @@ type VMessAccount struct {
 	ID          string `json:"id"`
 	AlterIds    uint16 `json:"alterId"`
 	Security    string `json:"security"`
+	Experiments string `json:"experiments"`
 }
 
 // Build implements Buildable
@@ -43,6 +44,7 @@ func (a *VMessAccount) Build() *vmess.Account {
 		SecuritySettings: &protocol.SecurityConfig{
 			Type: st,
 		},
+		TestsEnabled: a.Experiments,
 	}
 }
 

infra/conf/xray.go

@@ -276,6 +276,7 @@ type OutboundDetourConfig struct {
 	StreamSetting  *StreamConfig    `json:"streamSettings"`
 	ProxySettings  *ProxyConfig     `json:"proxySettings"`
 	MuxSettings    *MuxConfig       `json:"mux"`
+	DomainStrategy string           `json:"domainStrategy"`
 }
 
 func (c *OutboundDetourConfig) checkChainProxyConfig() error {
@@ -295,6 +296,21 @@ func (c *OutboundDetourConfig) Build() (*core.OutboundHandlerConfig, error) {
 		return nil, err
 	}
 
+	switch c.DomainStrategy {
+	case "UseIP":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_USE_IP
+	case "UseIPv4":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_USE_IP4
+	case "UseIPv6":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_USE_IP6
+	case "PreferIPv4":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_PREFER_IP4
+	case "PreferIPv6":
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_PREFER_IP6
+	default:
+		senderSettings.DomainStrategy = proxyman.DomainStrategy_AS_IS
+	}
+
 	if c.SendThrough != nil {
 		address := c.SendThrough
 		if address.Family().IsDomain() {

main/distro/all/all.go

@@ -9,10 +9,10 @@ import (
 	_ "github.com/xtls/xray-core/app/proxyman/outbound"
 
 	// Default commander and all its services. This is an optional feature.
-	_ "github.com/xtls/xray-core/app/commander"
+	//_ "github.com/xtls/xray-core/app/commander"
-	_ "github.com/xtls/xray-core/app/log/command"
+	//_ "github.com/xtls/xray-core/app/log/command"
-	_ "github.com/xtls/xray-core/app/proxyman/command"
+	//_ "github.com/xtls/xray-core/app/proxyman/command"
-	_ "github.com/xtls/xray-core/app/stats/command"
+	//_ "github.com/xtls/xray-core/app/stats/command"
 
 	// Other optional features.
 	_ "github.com/xtls/xray-core/app/dns"
@@ -33,7 +33,7 @@ import (
 	_ "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/mtproto"
 	_ "github.com/xtls/xray-core/proxy/shadowsocks"
 	_ "github.com/xtls/xray-core/proxy/socks"
 	_ "github.com/xtls/xray-core/proxy/trojan"
@@ -63,14 +63,9 @@ import (
 	_ "github.com/xtls/xray-core/transport/internet/headers/wechat"
 	_ "github.com/xtls/xray-core/transport/internet/headers/wireguard"
 
-	// JSON & TOML & YAML
 	_ "github.com/xtls/xray-core/main/json"
-	_ "github.com/xtls/xray-core/main/toml"
-	_ "github.com/xtls/xray-core/main/yaml"
-
 	// Load config from file or http(s)
-	_ "github.com/xtls/xray-core/main/confloader/external"
+	//_ "github.com/xtls/xray-core/main/confloader/external"
-
 	// Commands
-	_ "github.com/xtls/xray-core/main/commands/all"
+	//_ "github.com/xtls/xray-core/main/commands/all"
 )

main/toml/errors.generated.go

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

main/toml/toml.go

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

main/yaml/errors.generated.go

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

main/yaml/yaml.go

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

proxy/dns/dns.go

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

proxy/vmess/account.go

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

proxy/vmess/encoding/auth.go

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

proxy/vmess/encoding/client.go

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

proxy/vmess/encoding/server.go

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

proxy/vmess/inbound/inbound.go

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

proxy/vmess/outbound/outbound.go

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

testing/scenarios/vmess_test.go

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

transport/internet/dialer.go

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

transport/internet/system_dialer.go

@@ -11,7 +11,10 @@ import (
 	"github.com/xtls/xray-core/features/outbound"
 )
 
-var effectiveSystemDialer SystemDialer = &DefaultSystemDialer{}
+var (
+	effectiveSystemDialer    SystemDialer = &DefaultSystemDialer{}
+	effectiveSystemDNSDialer SystemDialer = &DefaultSystemDialer{}
+)
 
 type SystemDialer interface {
 	Dial(ctx context.Context, source net.Address, destination net.Destination, sockopt *SocketConfig) (net.Conn, error)
@@ -101,6 +104,17 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 	return dialer.DialContext(ctx, dest.Network.SystemString(), dest.NetAddr())
 }
 
+func ApplySockopt(sockopt *SocketConfig, dest net.Destination, fd uintptr, ctx context.Context) {
+	if err := applyOutboundSocketOptions(dest.Network.String(), dest.Address.String(), fd, sockopt); err != nil {
+		newError("failed to apply socket options").Base(err).WriteToLog(session.ExportIDToError(ctx))
+	}
+	if dest.Network == net.Network_UDP && hasBindAddr(sockopt) {
+		if err := bindAddr(fd, sockopt.BindAddress, sockopt.BindPort); err != nil {
+			newError("failed to bind source address to ", sockopt.BindAddress).Base(err).WriteToLog(session.ExportIDToError(ctx))
+		}
+	}
+}
+
 type PacketConnWrapper struct {
 	Conn net.PacketConn
 	Dest net.Addr
@@ -176,6 +190,13 @@ func UseAlternativeSystemDialer(dialer SystemDialer) {
 	effectiveSystemDialer = dialer
 }
 
+func UseAlternativeSystemDNSDialer(dialer SystemDialer) {
+	if dialer == nil {
+		effectiveSystemDNSDialer = &DefaultSystemDialer{}
+	}
+	effectiveSystemDNSDialer = dialer
+}
+
 // RegisterDialerController adds a controller to the effective system dialer.
 // The controller can be used to operate on file descriptors before they are put into use.
 // It only works when effective dialer is the default dialer.