Routing: fix router select wrong outbound when failed to resolve domain to ip

app/dispatcher/default.go

@@ -2,6 +2,7 @@ package dispatcher
 
 import (
 	"context"
+	go_errors "errors"
 	"regexp"
 	"strings"
 	"sync"
@@ -488,6 +489,12 @@ func (d *DefaultDispatcher) routedDispatch(ctx context.Context, link *transport.
 				return // DO NOT CHANGE: the traffic shouldn't be processed by default outbound if the specified outbound tag doesn't exist (yet), e.g., VLESS Reverse Proxy
 			}
 		} else {
+			if !go_errors.Is(err, common.ErrNoClue) {
+				errors.LogWarningInner(ctx, err, "get error during route pick ")
+				common.Close(link.Writer)
+				common.Interrupt(link.Reader)
+				return
+			}
 			errors.LogInfo(ctx, "default route for ", destination)
 		}
 	}

app/proxyman/config.go

@@ -1 +1,23 @@
 package proxyman
+
+func (s *AllocationStrategy) GetConcurrencyValue() uint32 {
+	if s == nil || s.Concurrency == nil {
+		return 3
+	}
+	return s.Concurrency.Value
+}
+
+func (s *AllocationStrategy) GetRefreshValue() uint32 {
+	if s == nil || s.Refresh == nil {
+		return 5
+	}
+	return s.Refresh.Value
+}
+
+func (c *ReceiverConfig) GetEffectiveSniffingSettings() *SniffingConfig {
+	if c.SniffingSettings != nil {
+		return c.SniffingSettings
+	}
+
+	return nil
+}

app/proxyman/config.pb.go

@@ -23,6 +23,58 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+type AllocationStrategy_Type int32
+
+const (
+	// Always allocate all connection handlers.
+	AllocationStrategy_Always AllocationStrategy_Type = 0
+	// Randomly allocate specific range of handlers.
+	AllocationStrategy_Random AllocationStrategy_Type = 1
+	// External. Not supported yet.
+	AllocationStrategy_External AllocationStrategy_Type = 2
+)
+
+// Enum value maps for AllocationStrategy_Type.
+var (
+	AllocationStrategy_Type_name = map[int32]string{
+		0: "Always",
+		1: "Random",
+		2: "External",
+	}
+	AllocationStrategy_Type_value = map[string]int32{
+		"Always":   0,
+		"Random":   1,
+		"External": 2,
+	}
+)
+
+func (x AllocationStrategy_Type) Enum() *AllocationStrategy_Type {
+	p := new(AllocationStrategy_Type)
+	*p = x
+	return p
+}
+
+func (x AllocationStrategy_Type) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (AllocationStrategy_Type) Descriptor() protoreflect.EnumDescriptor {
+	return file_app_proxyman_config_proto_enumTypes[0].Descriptor()
+}
+
+func (AllocationStrategy_Type) Type() protoreflect.EnumType {
+	return &file_app_proxyman_config_proto_enumTypes[0]
+}
+
+func (x AllocationStrategy_Type) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use AllocationStrategy_Type.Descriptor instead.
+func (AllocationStrategy_Type) EnumDescriptor() ([]byte, []int) {
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{1, 0}
+}
+
 type InboundConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -59,6 +111,71 @@ func (*InboundConfig) Descriptor() ([]byte, []int) {
 	return file_app_proxyman_config_proto_rawDescGZIP(), []int{0}
 }
 
+type AllocationStrategy struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Type AllocationStrategy_Type `protobuf:"varint,1,opt,name=type,proto3,enum=xray.app.proxyman.AllocationStrategy_Type" json:"type,omitempty"`
+	// Number of handlers (ports) running in parallel.
+	// Default value is 3 if unset.
+	Concurrency *AllocationStrategy_AllocationStrategyConcurrency `protobuf:"bytes,2,opt,name=concurrency,proto3" json:"concurrency,omitempty"`
+	// Number of minutes before a handler is regenerated.
+	// Default value is 5 if unset.
+	Refresh *AllocationStrategy_AllocationStrategyRefresh `protobuf:"bytes,3,opt,name=refresh,proto3" json:"refresh,omitempty"`
+}
+
+func (x *AllocationStrategy) Reset() {
+	*x = AllocationStrategy{}
+	mi := &file_app_proxyman_config_proto_msgTypes[1]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *AllocationStrategy) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AllocationStrategy) ProtoMessage() {}
+
+func (x *AllocationStrategy) ProtoReflect() protoreflect.Message {
+	mi := &file_app_proxyman_config_proto_msgTypes[1]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AllocationStrategy.ProtoReflect.Descriptor instead.
+func (*AllocationStrategy) Descriptor() ([]byte, []int) {
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *AllocationStrategy) GetType() AllocationStrategy_Type {
+	if x != nil {
+		return x.Type
+	}
+	return AllocationStrategy_Always
+}
+
+func (x *AllocationStrategy) GetConcurrency() *AllocationStrategy_AllocationStrategyConcurrency {
+	if x != nil {
+		return x.Concurrency
+	}
+	return nil
+}
+
+func (x *AllocationStrategy) GetRefresh() *AllocationStrategy_AllocationStrategyRefresh {
+	if x != nil {
+		return x.Refresh
+	}
+	return nil
+}
+
 type SniffingConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -79,7 +196,7 @@ type SniffingConfig struct {
 
 func (x *SniffingConfig) Reset() {
 	*x = SniffingConfig{}
-	mi := &file_app_proxyman_config_proto_msgTypes[1]
+	mi := &file_app_proxyman_config_proto_msgTypes[2]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -91,7 +208,7 @@ func (x *SniffingConfig) String() string {
 func (*SniffingConfig) ProtoMessage() {}
 
 func (x *SniffingConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_app_proxyman_config_proto_msgTypes[1]
+	mi := &file_app_proxyman_config_proto_msgTypes[2]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -104,7 +221,7 @@ func (x *SniffingConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SniffingConfig.ProtoReflect.Descriptor instead.
 func (*SniffingConfig) Descriptor() ([]byte, []int) {
-	return file_app_proxyman_config_proto_rawDescGZIP(), []int{1}
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *SniffingConfig) GetEnabled() bool {
@@ -151,14 +268,15 @@ type ReceiverConfig struct {
 	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"`
-	StreamSettings             *internet.StreamConfig `protobuf:"bytes,3,opt,name=stream_settings,json=streamSettings,proto3" json:"stream_settings,omitempty"`
+	AllocationStrategy         *AllocationStrategy    `protobuf:"bytes,3,opt,name=allocation_strategy,json=allocationStrategy,proto3" json:"allocation_strategy,omitempty"`
-	ReceiveOriginalDestination bool                   `protobuf:"varint,4,opt,name=receive_original_destination,json=receiveOriginalDestination,proto3" json:"receive_original_destination,omitempty"`
+	StreamSettings             *internet.StreamConfig `protobuf:"bytes,4,opt,name=stream_settings,json=streamSettings,proto3" json:"stream_settings,omitempty"`
-	SniffingSettings           *SniffingConfig        `protobuf:"bytes,6,opt,name=sniffing_settings,json=sniffingSettings,proto3" json:"sniffing_settings,omitempty"`
+	ReceiveOriginalDestination bool                   `protobuf:"varint,5,opt,name=receive_original_destination,json=receiveOriginalDestination,proto3" json:"receive_original_destination,omitempty"`
+	SniffingSettings           *SniffingConfig        `protobuf:"bytes,7,opt,name=sniffing_settings,json=sniffingSettings,proto3" json:"sniffing_settings,omitempty"`
 }
 
 func (x *ReceiverConfig) Reset() {
 	*x = ReceiverConfig{}
-	mi := &file_app_proxyman_config_proto_msgTypes[2]
+	mi := &file_app_proxyman_config_proto_msgTypes[3]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -170,7 +288,7 @@ func (x *ReceiverConfig) String() string {
 func (*ReceiverConfig) ProtoMessage() {}
 
 func (x *ReceiverConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_app_proxyman_config_proto_msgTypes[2]
+	mi := &file_app_proxyman_config_proto_msgTypes[3]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -183,7 +301,7 @@ func (x *ReceiverConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReceiverConfig.ProtoReflect.Descriptor instead.
 func (*ReceiverConfig) Descriptor() ([]byte, []int) {
-	return file_app_proxyman_config_proto_rawDescGZIP(), []int{2}
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *ReceiverConfig) GetPortList() *net.PortList {
@@ -200,6 +318,13 @@ func (x *ReceiverConfig) GetListen() *net.IPOrDomain {
 	return nil
 }
 
+func (x *ReceiverConfig) GetAllocationStrategy() *AllocationStrategy {
+	if x != nil {
+		return x.AllocationStrategy
+	}
+	return nil
+}
+
 func (x *ReceiverConfig) GetStreamSettings() *internet.StreamConfig {
 	if x != nil {
 		return x.StreamSettings
@@ -233,7 +358,7 @@ type InboundHandlerConfig struct {
 
 func (x *InboundHandlerConfig) Reset() {
 	*x = InboundHandlerConfig{}
-	mi := &file_app_proxyman_config_proto_msgTypes[3]
+	mi := &file_app_proxyman_config_proto_msgTypes[4]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -245,7 +370,7 @@ func (x *InboundHandlerConfig) String() string {
 func (*InboundHandlerConfig) ProtoMessage() {}
 
 func (x *InboundHandlerConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_app_proxyman_config_proto_msgTypes[3]
+	mi := &file_app_proxyman_config_proto_msgTypes[4]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -258,7 +383,7 @@ func (x *InboundHandlerConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InboundHandlerConfig.ProtoReflect.Descriptor instead.
 func (*InboundHandlerConfig) Descriptor() ([]byte, []int) {
-	return file_app_proxyman_config_proto_rawDescGZIP(), []int{3}
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *InboundHandlerConfig) GetTag() string {
@@ -290,7 +415,7 @@ type OutboundConfig struct {
 
 func (x *OutboundConfig) Reset() {
 	*x = OutboundConfig{}
-	mi := &file_app_proxyman_config_proto_msgTypes[4]
+	mi := &file_app_proxyman_config_proto_msgTypes[5]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -302,7 +427,7 @@ func (x *OutboundConfig) String() string {
 func (*OutboundConfig) ProtoMessage() {}
 
 func (x *OutboundConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_app_proxyman_config_proto_msgTypes[4]
+	mi := &file_app_proxyman_config_proto_msgTypes[5]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -315,7 +440,7 @@ func (x *OutboundConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OutboundConfig.ProtoReflect.Descriptor instead.
 func (*OutboundConfig) Descriptor() ([]byte, []int) {
-	return file_app_proxyman_config_proto_rawDescGZIP(), []int{4}
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{5}
 }
 
 type SenderConfig struct {
@@ -334,7 +459,7 @@ type SenderConfig struct {
 
 func (x *SenderConfig) Reset() {
 	*x = SenderConfig{}
-	mi := &file_app_proxyman_config_proto_msgTypes[5]
+	mi := &file_app_proxyman_config_proto_msgTypes[6]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -346,7 +471,7 @@ func (x *SenderConfig) String() string {
 func (*SenderConfig) ProtoMessage() {}
 
 func (x *SenderConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_app_proxyman_config_proto_msgTypes[5]
+	mi := &file_app_proxyman_config_proto_msgTypes[6]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -359,7 +484,7 @@ func (x *SenderConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SenderConfig.ProtoReflect.Descriptor instead.
 func (*SenderConfig) Descriptor() ([]byte, []int) {
-	return file_app_proxyman_config_proto_rawDescGZIP(), []int{5}
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *SenderConfig) GetVia() *net.IPOrDomain {
@@ -421,7 +546,7 @@ type MultiplexingConfig struct {
 
 func (x *MultiplexingConfig) Reset() {
 	*x = MultiplexingConfig{}
-	mi := &file_app_proxyman_config_proto_msgTypes[6]
+	mi := &file_app_proxyman_config_proto_msgTypes[7]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -433,7 +558,7 @@ func (x *MultiplexingConfig) String() string {
 func (*MultiplexingConfig) ProtoMessage() {}
 
 func (x *MultiplexingConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_app_proxyman_config_proto_msgTypes[6]
+	mi := &file_app_proxyman_config_proto_msgTypes[7]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -446,7 +571,7 @@ func (x *MultiplexingConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MultiplexingConfig.ProtoReflect.Descriptor instead.
 func (*MultiplexingConfig) Descriptor() ([]byte, []int) {
-	return file_app_proxyman_config_proto_rawDescGZIP(), []int{6}
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *MultiplexingConfig) GetEnabled() bool {
@@ -477,6 +602,96 @@ func (x *MultiplexingConfig) GetXudpProxyUDP443() string {
 	return ""
 }
 
+type AllocationStrategy_AllocationStrategyConcurrency struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Value uint32 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *AllocationStrategy_AllocationStrategyConcurrency) Reset() {
+	*x = AllocationStrategy_AllocationStrategyConcurrency{}
+	mi := &file_app_proxyman_config_proto_msgTypes[8]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *AllocationStrategy_AllocationStrategyConcurrency) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AllocationStrategy_AllocationStrategyConcurrency) ProtoMessage() {}
+
+func (x *AllocationStrategy_AllocationStrategyConcurrency) ProtoReflect() protoreflect.Message {
+	mi := &file_app_proxyman_config_proto_msgTypes[8]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AllocationStrategy_AllocationStrategyConcurrency.ProtoReflect.Descriptor instead.
+func (*AllocationStrategy_AllocationStrategyConcurrency) Descriptor() ([]byte, []int) {
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{1, 0}
+}
+
+func (x *AllocationStrategy_AllocationStrategyConcurrency) GetValue() uint32 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+type AllocationStrategy_AllocationStrategyRefresh struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Value uint32 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *AllocationStrategy_AllocationStrategyRefresh) Reset() {
+	*x = AllocationStrategy_AllocationStrategyRefresh{}
+	mi := &file_app_proxyman_config_proto_msgTypes[9]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *AllocationStrategy_AllocationStrategyRefresh) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AllocationStrategy_AllocationStrategyRefresh) ProtoMessage() {}
+
+func (x *AllocationStrategy_AllocationStrategyRefresh) ProtoReflect() protoreflect.Message {
+	mi := &file_app_proxyman_config_proto_msgTypes[9]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AllocationStrategy_AllocationStrategyRefresh.ProtoReflect.Descriptor instead.
+func (*AllocationStrategy_AllocationStrategyRefresh) Descriptor() ([]byte, []int) {
+	return file_app_proxyman_config_proto_rawDescGZIP(), []int{1, 1}
+}
+
+func (x *AllocationStrategy_AllocationStrategyRefresh) GetValue() uint32 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
 var File_app_proxyman_config_proto protoreflect.FileDescriptor
 
 var file_app_proxyman_config_proto_rawDesc = []byte{
@@ -491,98 +706,130 @@ var file_app_proxyman_config_proto_rawDesc = []byte{
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 }
 
 var (
@@ -597,39 +844,48 @@ func file_app_proxyman_config_proto_rawDescGZIP() []byte {
 	return file_app_proxyman_config_proto_rawDescData
 }
 
-var file_app_proxyman_config_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
+var file_app_proxyman_config_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_app_proxyman_config_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
 var file_app_proxyman_config_proto_goTypes = []any{
-	(*InboundConfig)(nil),         // 0: xray.app.proxyman.InboundConfig
+	(AllocationStrategy_Type)(0),                             // 0: xray.app.proxyman.AllocationStrategy.Type
-	(*SniffingConfig)(nil),        // 1: xray.app.proxyman.SniffingConfig
+	(*InboundConfig)(nil),                                    // 1: xray.app.proxyman.InboundConfig
-	(*ReceiverConfig)(nil),        // 2: xray.app.proxyman.ReceiverConfig
+	(*AllocationStrategy)(nil),                               // 2: xray.app.proxyman.AllocationStrategy
-	(*InboundHandlerConfig)(nil),  // 3: xray.app.proxyman.InboundHandlerConfig
+	(*SniffingConfig)(nil),                                   // 3: xray.app.proxyman.SniffingConfig
-	(*OutboundConfig)(nil),        // 4: xray.app.proxyman.OutboundConfig
+	(*ReceiverConfig)(nil),                                   // 4: xray.app.proxyman.ReceiverConfig
-	(*SenderConfig)(nil),          // 5: xray.app.proxyman.SenderConfig
+	(*InboundHandlerConfig)(nil),                             // 5: xray.app.proxyman.InboundHandlerConfig
-	(*MultiplexingConfig)(nil),    // 6: xray.app.proxyman.MultiplexingConfig
+	(*OutboundConfig)(nil),                                   // 6: xray.app.proxyman.OutboundConfig
-	(*net.PortList)(nil),          // 7: xray.common.net.PortList
+	(*SenderConfig)(nil),                                     // 7: xray.app.proxyman.SenderConfig
-	(*net.IPOrDomain)(nil),        // 8: xray.common.net.IPOrDomain
+	(*MultiplexingConfig)(nil),                               // 8: xray.app.proxyman.MultiplexingConfig
-	(*internet.StreamConfig)(nil), // 9: xray.transport.internet.StreamConfig
+	(*AllocationStrategy_AllocationStrategyConcurrency)(nil), // 9: xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
-	(*serial.TypedMessage)(nil),   // 10: xray.common.serial.TypedMessage
+	(*AllocationStrategy_AllocationStrategyRefresh)(nil),     // 10: xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
-	(*internet.ProxyConfig)(nil),  // 11: xray.transport.internet.ProxyConfig
+	(*net.PortList)(nil),                                     // 11: xray.common.net.PortList
-	(internet.DomainStrategy)(0),  // 12: xray.transport.internet.DomainStrategy
+	(*net.IPOrDomain)(nil),                                   // 12: xray.common.net.IPOrDomain
+	(*internet.StreamConfig)(nil),                            // 13: xray.transport.internet.StreamConfig
+	(*serial.TypedMessage)(nil),                              // 14: xray.common.serial.TypedMessage
+	(*internet.ProxyConfig)(nil),                             // 15: xray.transport.internet.ProxyConfig
+	(internet.DomainStrategy)(0),                             // 16: xray.transport.internet.DomainStrategy
 }
 var file_app_proxyman_config_proto_depIdxs = []int32{
-	7,  // 0: xray.app.proxyman.ReceiverConfig.port_list:type_name -> xray.common.net.PortList
+	0,  // 0: xray.app.proxyman.AllocationStrategy.type:type_name -> xray.app.proxyman.AllocationStrategy.Type
-	8,  // 1: xray.app.proxyman.ReceiverConfig.listen:type_name -> xray.common.net.IPOrDomain
+	9,  // 1: xray.app.proxyman.AllocationStrategy.concurrency:type_name -> xray.app.proxyman.AllocationStrategy.AllocationStrategyConcurrency
-	9,  // 2: xray.app.proxyman.ReceiverConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
+	10, // 2: xray.app.proxyman.AllocationStrategy.refresh:type_name -> xray.app.proxyman.AllocationStrategy.AllocationStrategyRefresh
-	1,  // 3: xray.app.proxyman.ReceiverConfig.sniffing_settings:type_name -> xray.app.proxyman.SniffingConfig
+	11, // 3: xray.app.proxyman.ReceiverConfig.port_list:type_name -> xray.common.net.PortList
-	10, // 4: xray.app.proxyman.InboundHandlerConfig.receiver_settings:type_name -> xray.common.serial.TypedMessage
+	12, // 4: xray.app.proxyman.ReceiverConfig.listen:type_name -> xray.common.net.IPOrDomain
-	10, // 5: xray.app.proxyman.InboundHandlerConfig.proxy_settings:type_name -> xray.common.serial.TypedMessage
+	2,  // 5: xray.app.proxyman.ReceiverConfig.allocation_strategy:type_name -> xray.app.proxyman.AllocationStrategy
-	8,  // 6: xray.app.proxyman.SenderConfig.via:type_name -> xray.common.net.IPOrDomain
+	13, // 6: xray.app.proxyman.ReceiverConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
-	9,  // 7: xray.app.proxyman.SenderConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
+	3,  // 7: xray.app.proxyman.ReceiverConfig.sniffing_settings:type_name -> xray.app.proxyman.SniffingConfig
-	11, // 8: xray.app.proxyman.SenderConfig.proxy_settings:type_name -> xray.transport.internet.ProxyConfig
+	14, // 8: xray.app.proxyman.InboundHandlerConfig.receiver_settings:type_name -> xray.common.serial.TypedMessage
-	6,  // 9: xray.app.proxyman.SenderConfig.multiplex_settings:type_name -> xray.app.proxyman.MultiplexingConfig
+	14, // 9: xray.app.proxyman.InboundHandlerConfig.proxy_settings:type_name -> xray.common.serial.TypedMessage
-	12, // 10: xray.app.proxyman.SenderConfig.target_strategy:type_name -> xray.transport.internet.DomainStrategy
+	12, // 10: xray.app.proxyman.SenderConfig.via:type_name -> xray.common.net.IPOrDomain
-	11, // [11:11] is the sub-list for method output_type
+	13, // 11: xray.app.proxyman.SenderConfig.stream_settings:type_name -> xray.transport.internet.StreamConfig
-	11, // [11:11] is the sub-list for method input_type
+	15, // 12: xray.app.proxyman.SenderConfig.proxy_settings:type_name -> xray.transport.internet.ProxyConfig
-	11, // [11:11] is the sub-list for extension type_name
+	8,  // 13: xray.app.proxyman.SenderConfig.multiplex_settings:type_name -> xray.app.proxyman.MultiplexingConfig
-	11, // [11:11] is the sub-list for extension extendee
+	16, // 14: xray.app.proxyman.SenderConfig.target_strategy:type_name -> xray.transport.internet.DomainStrategy
-	0,  // [0:11] is the sub-list for field type_name
+	15, // [15:15] is the sub-list for method output_type
+	15, // [15:15] is the sub-list for method input_type
+	15, // [15:15] is the sub-list for extension type_name
+	15, // [15:15] is the sub-list for extension extendee
+	0,  // [0:15] is the sub-list for field type_name
 }
 
 func init() { file_app_proxyman_config_proto_init() }
@@ -642,13 +898,14 @@ func file_app_proxyman_config_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_proxyman_config_proto_rawDesc,
-			NumEnums:      0,
+			NumEnums:      1,
-			NumMessages:   7,
+			NumMessages:   10,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
 		GoTypes:           file_app_proxyman_config_proto_goTypes,
 		DependencyIndexes: file_app_proxyman_config_proto_depIdxs,
+		EnumInfos:         file_app_proxyman_config_proto_enumTypes,
 		MessageInfos:      file_app_proxyman_config_proto_msgTypes,
 	}.Build()
 	File_app_proxyman_config_proto = out.File

app/proxyman/config.proto

@@ -13,6 +13,33 @@ import "common/serial/typed_message.proto";
 
 message InboundConfig {}
 
+message AllocationStrategy {
+  enum Type {
+    // Always allocate all connection handlers.
+    Always = 0;
+
+    // Randomly allocate specific range of handlers.
+    Random = 1;
+
+    // External. Not supported yet.
+    External = 2;
+  }
+
+  Type type = 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; }
+
+  // Number of minutes before a handler is regenerated.
+  // Default value is 5 if unset.
+  AllocationStrategyRefresh refresh = 3;
+}
+
 message SniffingConfig {
   // Whether or not to enable content sniffing on an inbound connection.
   bool enabled = 1;
@@ -35,10 +62,11 @@ message ReceiverConfig {
   xray.common.net.PortList port_list = 1;
   // Listen specifies the IP address that the Receiver should listen on.
   xray.common.net.IPOrDomain listen = 2;
-  xray.transport.internet.StreamConfig stream_settings = 3;
+  AllocationStrategy allocation_strategy = 3;
-  bool receive_original_destination = 4;
+  xray.transport.internet.StreamConfig stream_settings = 4;
-  reserved 5;
+  bool receive_original_destination = 5;
-  SniffingConfig sniffing_settings = 6;
+  reserved 6;
+  SniffingConfig sniffing_settings = 7;
 }
 
 message InboundHandlerConfig {

app/proxyman/inbound/always.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/mux"
 	"github.com/xtls/xray-core/common/net"
@@ -102,7 +103,7 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 				stream:          mss,
 				tag:             tag,
 				dispatcher:      h.mux,
-				sniffingConfig:  receiverConfig.SniffingSettings,
+				sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
 				uplinkCounter:   uplinkCounter,
 				downlinkCounter: downlinkCounter,
 				ctx:             ctx,
@@ -124,7 +125,7 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 						recvOrigDest:    receiverConfig.ReceiveOriginalDestination,
 						tag:             tag,
 						dispatcher:      h.mux,
-						sniffingConfig:  receiverConfig.SniffingSettings,
+						sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
 						uplinkCounter:   uplinkCounter,
 						downlinkCounter: downlinkCounter,
 						ctx:             ctx,
@@ -139,7 +140,7 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 						address:         address,
 						port:            net.Port(port),
 						dispatcher:      h.mux,
-						sniffingConfig:  receiverConfig.SniffingSettings,
+						sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
 						uplinkCounter:   uplinkCounter,
 						downlinkCounter: downlinkCounter,
 						stream:          mss,
@@ -177,6 +178,14 @@ func (h *AlwaysOnInboundHandler) Close() error {
 	return nil
 }
 
+func (h *AlwaysOnInboundHandler) GetRandomInboundProxy() (interface{}, net.Port, int) {
+	if len(h.workers) == 0 {
+		return nil, 0, 0
+	}
+	w := h.workers[dice.Roll(len(h.workers))]
+	return w.Proxy(), w.Port(), 9999
+}
+
 func (h *AlwaysOnInboundHandler) Tag() string {
 	return h.tag
 }

app/proxyman/inbound/dynamic.go

@@ -0,0 +1,222 @@
+package inbound
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	"github.com/xtls/xray-core/app/proxyman"
+	"github.com/xtls/xray-core/common/dice"
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/mux"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/serial"
+	"github.com/xtls/xray-core/common/task"
+	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/proxy"
+	"github.com/xtls/xray-core/transport/internet"
+	"google.golang.org/protobuf/proto"
+)
+
+type DynamicInboundHandler struct {
+	tag            string
+	v              *core.Instance
+	proxyConfig    interface{}
+	receiverConfig *proxyman.ReceiverConfig
+	streamSettings *internet.MemoryStreamConfig
+	portMutex      sync.Mutex
+	portsInUse     map[net.Port]struct{}
+	workerMutex    sync.RWMutex
+	worker         []worker
+	lastRefresh    time.Time
+	mux            *mux.Server
+	task           *task.Periodic
+
+	ctx context.Context
+}
+
+func NewDynamicInboundHandler(ctx context.Context, tag string, receiverConfig *proxyman.ReceiverConfig, proxyConfig interface{}) (*DynamicInboundHandler, error) {
+	v := core.MustFromContext(ctx)
+	h := &DynamicInboundHandler{
+		tag:            tag,
+		proxyConfig:    proxyConfig,
+		receiverConfig: receiverConfig,
+		portsInUse:     make(map[net.Port]struct{}),
+		mux:            mux.NewServer(ctx),
+		v:              v,
+		ctx:            ctx,
+	}
+
+	mss, err := internet.ToMemoryStreamConfig(receiverConfig.StreamSettings)
+	if err != nil {
+		return nil, errors.New("failed to parse stream settings").Base(err).AtWarning()
+	}
+	if receiverConfig.ReceiveOriginalDestination {
+		if mss.SocketSettings == nil {
+			mss.SocketSettings = &internet.SocketConfig{}
+		}
+		if mss.SocketSettings.Tproxy == internet.SocketConfig_Off {
+			mss.SocketSettings.Tproxy = internet.SocketConfig_Redirect
+		}
+		mss.SocketSettings.ReceiveOriginalDestAddress = true
+	}
+
+	h.streamSettings = mss
+
+	h.task = &task.Periodic{
+		Interval: time.Minute * time.Duration(h.receiverConfig.AllocationStrategy.GetRefreshValue()),
+		Execute:  h.refresh,
+	}
+
+	return h, nil
+}
+
+func (h *DynamicInboundHandler) allocatePort() net.Port {
+	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(len(allPorts))
+		port := net.Port(allPorts[r])
+		_, used := h.portsInUse[port]
+		if !used {
+			h.portsInUse[port] = struct{}{}
+			return port
+		}
+	}
+}
+
+func (h *DynamicInboundHandler) closeWorkers(workers []worker) {
+	ports2Del := make([]net.Port, len(workers))
+	for idx, worker := range workers {
+		ports2Del[idx] = worker.Port()
+		if err := worker.Close(); err != nil {
+			errors.LogInfoInner(h.ctx, err, "failed to close worker")
+		}
+	}
+
+	h.portMutex.Lock()
+	for _, port := range ports2Del {
+		delete(h.portsInUse, port)
+	}
+	h.portMutex.Unlock()
+}
+
+func (h *DynamicInboundHandler) refresh() error {
+	h.lastRefresh = time.Now()
+
+	timeout := time.Minute * time.Duration(h.receiverConfig.AllocationStrategy.GetRefreshValue()) * 2
+	concurrency := h.receiverConfig.AllocationStrategy.GetConcurrencyValue()
+	workers := make([]worker, 0, concurrency)
+
+	address := h.receiverConfig.Listen.AsAddress()
+	if address == nil {
+		address = net.AnyIP
+	}
+
+	uplinkCounter, downlinkCounter := getStatCounter(h.v, h.tag)
+
+	for i := uint32(0); i < concurrency; i++ {
+		port := h.allocatePort()
+		rawProxy, err := core.CreateObject(h.v, h.proxyConfig)
+		if err != nil {
+			errors.LogWarningInner(h.ctx, err, "failed to create proxy instance")
+			continue
+		}
+		p := rawProxy.(proxy.Inbound)
+		nl := p.Network()
+		if net.HasNetwork(nl, net.Network_TCP) {
+			worker := &tcpWorker{
+				tag:             h.tag,
+				address:         address,
+				port:            port,
+				proxy:           p,
+				stream:          h.streamSettings,
+				recvOrigDest:    h.receiverConfig.ReceiveOriginalDestination,
+				dispatcher:      h.mux,
+				sniffingConfig:  h.receiverConfig.GetEffectiveSniffingSettings(),
+				uplinkCounter:   uplinkCounter,
+				downlinkCounter: downlinkCounter,
+				ctx:             h.ctx,
+			}
+			if err := worker.Start(); err != nil {
+				errors.LogWarningInner(h.ctx, err, "failed to create TCP worker")
+				continue
+			}
+			workers = append(workers, worker)
+		}
+
+		if net.HasNetwork(nl, net.Network_UDP) {
+			worker := &udpWorker{
+				tag:             h.tag,
+				proxy:           p,
+				address:         address,
+				port:            port,
+				dispatcher:      h.mux,
+				sniffingConfig:  h.receiverConfig.GetEffectiveSniffingSettings(),
+				uplinkCounter:   uplinkCounter,
+				downlinkCounter: downlinkCounter,
+				stream:          h.streamSettings,
+				ctx:             h.ctx,
+			}
+			if err := worker.Start(); err != nil {
+				errors.LogWarningInner(h.ctx, err, "failed to create UDP worker")
+				continue
+			}
+			workers = append(workers, worker)
+		}
+	}
+
+	h.workerMutex.Lock()
+	h.worker = workers
+	h.workerMutex.Unlock()
+
+	time.AfterFunc(timeout, func() {
+		h.closeWorkers(workers)
+	})
+
+	return nil
+}
+
+func (h *DynamicInboundHandler) Start() error {
+	return h.task.Start()
+}
+
+func (h *DynamicInboundHandler) Close() error {
+	return h.task.Close()
+}
+
+func (h *DynamicInboundHandler) GetRandomInboundProxy() (interface{}, net.Port, int) {
+	h.workerMutex.RLock()
+	defer h.workerMutex.RUnlock()
+
+	if len(h.worker) == 0 {
+		return nil, 0, 0
+	}
+	w := h.worker[dice.Roll(len(h.worker))]
+	expire := h.receiverConfig.AllocationStrategy.GetRefreshValue() - uint32(time.Since(h.lastRefresh)/time.Minute)
+	return w.Proxy(), w.Port(), int(expire)
+}
+
+func (h *DynamicInboundHandler) Tag() string {
+	return h.tag
+}
+
+// ReceiverSettings implements inbound.Handler.
+func (h *DynamicInboundHandler) ReceiverSettings() *serial.TypedMessage {
+	return serial.ToTypedMessage(h.receiverConfig)
+}
+
+// ProxySettings implements inbound.Handler.
+func (h *DynamicInboundHandler) ProxySettings() *serial.TypedMessage {
+	if v, ok := h.proxyConfig.(proto.Message); ok {
+		return serial.ToTypedMessage(v)
+	}
+	return nil
+}

app/proxyman/inbound/inbound.go

@@ -178,7 +178,15 @@ func NewHandler(ctx context.Context, config *core.InboundHandlerConfig) (inbound
 		ctx = session.ContextWithAllowedNetwork(ctx, net.Network_UDP)
 	}
 
-	return NewAlwaysOnInboundHandler(ctx, tag, receiverSettings, proxySettings)
+	allocStrategy := receiverSettings.AllocationStrategy
+	if allocStrategy == nil || allocStrategy.Type == proxyman.AllocationStrategy_Always {
+		return NewAlwaysOnInboundHandler(ctx, tag, receiverSettings, proxySettings)
+	}
+
+	if allocStrategy.Type == proxyman.AllocationStrategy_Random {
+		return NewDynamicInboundHandler(ctx, tag, receiverSettings, proxySettings)
+	}
+	return nil, errors.New("unknown allocation strategy: ", receiverSettings.AllocationStrategy.Type).AtError()
 }
 
 func init() {

app/reverse/portal.go

@@ -72,14 +72,7 @@ func (p *Portal) HandleConnection(ctx context.Context, link *transport.Link) err
 	}
 
 	if isDomain(ob.Target, p.domain) {
-		opts := pipe.OptionsFromContext(ctx)
+		muxClient, err := mux.NewClientWorker(*link, mux.ClientStrategy{})
-		uplinkReader, uplinkWriter := pipe.New(opts...)
-		downlinkReader, downlinkWriter := pipe.New(opts...)
-		
-		muxClient, err := mux.NewClientWorker(transport.Link{
-			Reader: uplinkReader,
-			Writer: downlinkWriter,
-		}, mux.ClientStrategy{})
 		if err != nil {
 			return errors.New("failed to create mux client worker").Base(err).AtWarning()
 		}
@@ -91,24 +84,11 @@ func (p *Portal) HandleConnection(ctx context.Context, link *transport.Link) err
 
 		p.picker.AddWorker(worker)
 
-		inboundLink := &transport.Link{Reader: downlinkReader, Writer: uplinkWriter} 
+		if _, ok := link.Reader.(*pipe.Reader); !ok {
-		requestDone := func() error {
+			select {
-			if err := buf.Copy(link.Reader, inboundLink.Writer); err != nil {
+			case <-ctx.Done():
-				return errors.New("failed to transfer request").Base(err)
+			case <-muxClient.WaitClosed():
 			}
-			return nil
-		}
-		responseDone := func() error {
-			if err := buf.Copy(inboundLink.Reader, link.Writer); err != nil {
-				return err
-			}
-			return nil
-		}
-		requestDonePost := task.OnSuccess(requestDone, task.Close(inboundLink.Writer))
-		if err := task.Run(ctx, requestDonePost, responseDone); err != nil {
-			common.Interrupt(inboundLink.Reader)
-			common.Interrupt(inboundLink.Writer)
-			return errors.New("connection ends").Base(err)
 		}
 		return nil
 	}

app/router/command/config.go

@@ -51,6 +51,10 @@ func (c routingContext) GetSkipDNSResolve() bool {
 	return false
 }
 
+func (c routingContext) GetError() error {
+	return nil
+}
+
 // AsRoutingContext converts a protobuf RoutingContext into an implementation of routing.Context.
 func AsRoutingContext(r *RoutingContext) routing.Context {
 	return routingContext{r}

app/router/router.go

@@ -195,6 +195,9 @@ func (r *Router) pickRouteInternal(ctx routing.Context) (*Rule, routing.Context,
 		if rule.Apply(ctx) {
 			return rule, ctx, nil
 		}
+		if err := ctx.GetError(); err != nil {
+			return nil, ctx, err
+		}
 	}
 
 	if r.domainStrategy != Config_IpIfNonMatch || len(ctx.GetTargetDomain()) == 0 || skipDNSResolve {
@@ -208,6 +211,9 @@ func (r *Router) pickRouteInternal(ctx routing.Context) (*Rule, routing.Context,
 		if rule.Apply(ctx) {
 			return rule, ctx, nil
 		}
+		if err := ctx.GetError(); err != nil {
+			return nil, ctx, err
+		}
 	}
 
 	return nil, ctx, common.ErrNoClue

common/mux/server.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"time"
 
+	"github.com/xtls/xray-core/app/dispatcher"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -12,11 +13,8 @@ import (
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/session"
-	//"github.com/xtls/xray-core/common/signal"
 	"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/policy"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/pipe"
@@ -66,43 +64,14 @@ func (s *Server) DispatchLink(ctx context.Context, dest net.Destination, link *t
 	if dest.Address != muxCoolAddress {
 		return s.dispatcher.DispatchLink(ctx, dest, link)
 	}
-
+	link = s.dispatcher.(*dispatcher.DefaultDispatcher).WrapLink(ctx, link)
-	// For Mux, we need to use pipe to guard against multiple sub-connections writing back responses at the same time
+	worker, err := NewServerWorker(ctx, s.dispatcher, link)
-	// sessionPolicy = h.policyManager.ForLevel(request.User.Level)
-	// ctx, cancel := context.WithCancel(ctx)
-	// timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
-	// ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
-	opts := pipe.OptionsFromContext(ctx)
-	uplinkReader, uplinkWriter := pipe.New(opts...)
-	downlinkReader, downlinkWriter := pipe.New(opts...)
-
-	_, err := NewServerWorker(ctx, s.dispatcher, &transport.Link{
-		Reader: uplinkReader,
-		Writer: downlinkWriter,
-	})
 	if err != nil {
 		return err
 	}
-	inboundLink := &transport.Link{Reader: downlinkReader, Writer: uplinkWriter} 
+	select {
-	requestDone := func() error {
+	case <-ctx.Done():
-		//defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
+	case <-worker.done.Wait():
-		if err := buf.Copy(link.Reader, inboundLink.Writer); err != nil {
-			return errors.New("failed to transfer request").Base(err)
-		}
-		return nil
-	}
-	responseDone := func() error {
-		//defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
-		if err := buf.Copy(inboundLink.Reader, link.Writer); err != nil {
-			return err
-		}
-		return nil
-	}
-	requestDonePost := task.OnSuccess(requestDone, task.Close(inboundLink.Writer))
-	if err := task.Run(ctx, requestDonePost, responseDone); err != nil {
-		common.Interrupt(inboundLink.Reader)
-		common.Interrupt(inboundLink.Writer)
-		return errors.New("connection ends").Base(err)
 	}
 	return nil
 }

common/protocol/headers.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/xtls/xray-core/common/bitmask"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/uuid"
 	"golang.org/x/sys/cpu"
 )
 
@@ -70,6 +71,14 @@ type ResponseHeader struct {
 	Command ResponseCommand
 }
 
+type CommandSwitchAccount struct {
+	Host     net.Address
+	Port     net.Port
+	ID       uuid.UUID
+	Level    uint32
+	ValidMin byte
+}
+
 var (
 	// Keep in sync with crypto/tls/cipher_suites.go.
 	hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ && cpu.X86.HasSSE41 && cpu.X86.HasSSSE3

common/protocol/server_picker.go

@@ -0,0 +1,89 @@
+package protocol
+
+import (
+	"sync"
+)
+
+type ServerList struct {
+	sync.RWMutex
+	servers []*ServerSpec
+}
+
+func NewServerList() *ServerList {
+	return &ServerList{}
+}
+
+func (sl *ServerList) AddServer(server *ServerSpec) {
+	sl.Lock()
+	defer sl.Unlock()
+
+	sl.servers = append(sl.servers, server)
+}
+
+func (sl *ServerList) Size() uint32 {
+	sl.RLock()
+	defer sl.RUnlock()
+
+	return uint32(len(sl.servers))
+}
+
+func (sl *ServerList) GetServer(idx uint32) *ServerSpec {
+	sl.Lock()
+	defer sl.Unlock()
+
+	for {
+		if idx >= uint32(len(sl.servers)) {
+			return nil
+		}
+
+		server := sl.servers[idx]
+		if !server.IsValid() {
+			sl.removeServer(idx)
+			continue
+		}
+
+		return server
+	}
+}
+
+func (sl *ServerList) removeServer(idx uint32) {
+	n := len(sl.servers)
+	sl.servers[idx] = sl.servers[n-1]
+	sl.servers = sl.servers[:n-1]
+}
+
+type ServerPicker interface {
+	PickServer() *ServerSpec
+}
+
+type RoundRobinServerPicker struct {
+	sync.Mutex
+	serverlist *ServerList
+	nextIndex  uint32
+}
+
+func NewRoundRobinServerPicker(serverlist *ServerList) *RoundRobinServerPicker {
+	return &RoundRobinServerPicker{
+		serverlist: serverlist,
+		nextIndex:  0,
+	}
+}
+
+func (p *RoundRobinServerPicker) PickServer() *ServerSpec {
+	p.Lock()
+	defer p.Unlock()
+
+	next := p.nextIndex
+	server := p.serverlist.GetServer(next)
+	if server == nil {
+		next = 0
+		server = p.serverlist.GetServer(0)
+	}
+	next++
+	if next >= p.serverlist.Size() {
+		next = 0
+	}
+	p.nextIndex = next
+
+	return server
+}

common/protocol/server_picker_test.go

@@ -0,0 +1,71 @@
+package protocol_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/xtls/xray-core/common/net"
+	. "github.com/xtls/xray-core/common/protocol"
+)
+
+func TestServerList(t *testing.T) {
+	list := NewServerList()
+	list.AddServer(NewServerSpec(net.TCPDestination(net.LocalHostIP, net.Port(1)), AlwaysValid()))
+	if list.Size() != 1 {
+		t.Error("list size: ", list.Size())
+	}
+	list.AddServer(NewServerSpec(net.TCPDestination(net.LocalHostIP, net.Port(2)), BeforeTime(time.Now().Add(time.Second))))
+	if list.Size() != 2 {
+		t.Error("list.size: ", list.Size())
+	}
+
+	server := list.GetServer(1)
+	if server.Destination().Port != 2 {
+		t.Error("server: ", server.Destination())
+	}
+	time.Sleep(2 * time.Second)
+	server = list.GetServer(1)
+	if server != nil {
+		t.Error("server: ", server)
+	}
+
+	server = list.GetServer(0)
+	if server.Destination().Port != 1 {
+		t.Error("server: ", server.Destination())
+	}
+}
+
+func TestServerPicker(t *testing.T) {
+	list := NewServerList()
+	list.AddServer(NewServerSpec(net.TCPDestination(net.LocalHostIP, net.Port(1)), AlwaysValid()))
+	list.AddServer(NewServerSpec(net.TCPDestination(net.LocalHostIP, net.Port(2)), BeforeTime(time.Now().Add(time.Second))))
+	list.AddServer(NewServerSpec(net.TCPDestination(net.LocalHostIP, net.Port(3)), BeforeTime(time.Now().Add(time.Second))))
+
+	picker := NewRoundRobinServerPicker(list)
+	server := picker.PickServer()
+	if server.Destination().Port != 1 {
+		t.Error("server: ", server.Destination())
+	}
+	server = picker.PickServer()
+	if server.Destination().Port != 2 {
+		t.Error("server: ", server.Destination())
+	}
+	server = picker.PickServer()
+	if server.Destination().Port != 3 {
+		t.Error("server: ", server.Destination())
+	}
+	server = picker.PickServer()
+	if server.Destination().Port != 1 {
+		t.Error("server: ", server.Destination())
+	}
+
+	time.Sleep(2 * time.Second)
+	server = picker.PickServer()
+	if server.Destination().Port != 1 {
+		t.Error("server: ", server.Destination())
+	}
+	server = picker.PickServer()
+	if server.Destination().Port != 1 {
+		t.Error("server: ", server.Destination())
+	}
+}

common/protocol/server_spec.go

@@ -1,30 +1,122 @@
 package protocol
 
 import (
+	"sync"
+	"time"
+
+	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/net"
 )
 
-type ServerSpec struct {
+type ValidationStrategy interface {
-	Destination  net.Destination
+	IsValid() bool
-	User         *MemoryUser
+	Invalidate()
 }
 
-func NewServerSpec(dest net.Destination, user *MemoryUser) *ServerSpec {
+type alwaysValidStrategy struct{}
+
+func AlwaysValid() ValidationStrategy {
+	return alwaysValidStrategy{}
+}
+
+func (alwaysValidStrategy) IsValid() bool {
+	return true
+}
+
+func (alwaysValidStrategy) Invalidate() {}
+
+type timeoutValidStrategy struct {
+	until time.Time
+}
+
+func BeforeTime(t time.Time) ValidationStrategy {
+	return &timeoutValidStrategy{
+		until: t,
+	}
+}
+
+func (s *timeoutValidStrategy) IsValid() bool {
+	return s.until.After(time.Now())
+}
+
+func (s *timeoutValidStrategy) Invalidate() {
+	s.until = time.Time{}
+}
+
+type ServerSpec struct {
+	sync.RWMutex
+	dest  net.Destination
+	users []*MemoryUser
+	valid ValidationStrategy
+}
+
+func NewServerSpec(dest net.Destination, valid ValidationStrategy, users ...*MemoryUser) *ServerSpec {
 	return &ServerSpec{
-		Destination: dest,
+		dest:  dest,
-		User:        user,
+		users: users,
+		valid: valid,
 	}
 }
 
 func NewServerSpecFromPB(spec *ServerEndpoint) (*ServerSpec, error) {
 	dest := net.TCPDestination(spec.Address.AsAddress(), net.Port(spec.Port))
-	var dUser *MemoryUser
+	mUsers := make([]*MemoryUser, len(spec.User))
-	if spec.User != nil {
+	for idx, u := range spec.User {
-		user, err := spec.User.ToMemoryUser()
+		mUser, err := u.ToMemoryUser()
 		if err != nil {
 			return nil, err
 		}
-		dUser = user
+		mUsers[idx] = mUser
 	}
-	return NewServerSpec(dest, dUser), nil
+	return NewServerSpec(dest, AlwaysValid(), mUsers...), nil
+}
+
+func (s *ServerSpec) Destination() net.Destination {
+	return s.dest
+}
+
+func (s *ServerSpec) HasUser(user *MemoryUser) bool {
+	s.RLock()
+	defer s.RUnlock()
+
+	for _, u := range s.users {
+		if u.Account.Equals(user.Account) {
+			return true
+		}
+	}
+	return false
+}
+
+func (s *ServerSpec) AddUser(user *MemoryUser) {
+	if s.HasUser(user) {
+		return
+	}
+
+	s.Lock()
+	defer s.Unlock()
+
+	s.users = append(s.users, user)
+}
+
+func (s *ServerSpec) PickUser() *MemoryUser {
+	s.RLock()
+	defer s.RUnlock()
+
+	userCount := len(s.users)
+	switch userCount {
+	case 0:
+		return nil
+	case 1:
+		return s.users[0]
+	default:
+		return s.users[dice.Roll(userCount)]
+	}
+}
+
+func (s *ServerSpec) IsValid() bool {
+	return s.valid.IsValid()
+}
+
+func (s *ServerSpec) Invalidate() {
+	s.valid.Invalidate()
 }

common/protocol/server_spec.pb.go

@@ -28,7 +28,7 @@ type ServerEndpoint struct {
 
 	Address *net.IPOrDomain `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
 	Port    uint32          `protobuf:"varint,2,opt,name=port,proto3" json:"port,omitempty"`
-	User    *User           `protobuf:"bytes,3,opt,name=user,proto3" json:"user,omitempty"`
+	User    []*User         `protobuf:"bytes,3,rep,name=user,proto3" json:"user,omitempty"`
 }
 
 func (x *ServerEndpoint) Reset() {
@@ -75,7 +75,7 @@ func (x *ServerEndpoint) GetPort() uint32 {
 	return 0
 }
 
-func (x *ServerEndpoint) GetUser() *User {
+func (x *ServerEndpoint) GetUser() []*User {
 	if x != nil {
 		return x.User
 	}
@@ -98,7 +98,7 @@ var file_common_protocol_server_spec_proto_rawDesc = []byte{
 	0x6e, 0x2e, 0x6e, 0x65, 0x74, 0x2e, 0x49, 0x50, 0x4f, 0x72, 0x44, 0x6f, 0x6d, 0x61, 0x69, 0x6e,
 	0x52, 0x07, 0x61, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x12, 0x12, 0x0a, 0x04, 0x70, 0x6f, 0x72,
 	0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x04, 0x70, 0x6f, 0x72, 0x74, 0x12, 0x2e, 0x0a,
-	0x04, 0x75, 0x73, 0x65, 0x72, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x78, 0x72,
+	0x04, 0x75, 0x73, 0x65, 0x72, 0x18, 0x03, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x78, 0x72,
 	0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63,
 	0x6f, 0x6c, 0x2e, 0x55, 0x73, 0x65, 0x72, 0x52, 0x04, 0x75, 0x73, 0x65, 0x72, 0x42, 0x5e, 0x0a,
 	0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e,

common/protocol/server_spec.proto

@@ -12,5 +12,5 @@ import "common/protocol/user.proto";
 message ServerEndpoint {
   xray.common.net.IPOrDomain address = 1;
   uint32 port = 2;
-  xray.common.protocol.User user = 3;
+  repeated xray.common.protocol.User user = 3;
 }

common/protocol/server_spec_test.go

@@ -0,0 +1,79 @@
+package protocol_test
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
+	. "github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/common/uuid"
+	"github.com/xtls/xray-core/proxy/vmess"
+)
+
+func TestAlwaysValidStrategy(t *testing.T) {
+	strategy := AlwaysValid()
+	if !strategy.IsValid() {
+		t.Error("strategy not valid")
+	}
+	strategy.Invalidate()
+	if !strategy.IsValid() {
+		t.Error("strategy not valid")
+	}
+}
+
+func TestTimeoutValidStrategy(t *testing.T) {
+	strategy := BeforeTime(time.Now().Add(2 * time.Second))
+	if !strategy.IsValid() {
+		t.Error("strategy not valid")
+	}
+	time.Sleep(3 * time.Second)
+	if strategy.IsValid() {
+		t.Error("strategy is valid")
+	}
+
+	strategy = BeforeTime(time.Now().Add(2 * time.Second))
+	strategy.Invalidate()
+	if strategy.IsValid() {
+		t.Error("strategy is valid")
+	}
+}
+
+func TestUserInServerSpec(t *testing.T) {
+	uuid1 := uuid.New()
+	uuid2 := uuid.New()
+
+	toAccount := func(a *vmess.Account) Account {
+		account, err := a.AsAccount()
+		common.Must(err)
+		return account
+	}
+
+	spec := NewServerSpec(net.Destination{}, AlwaysValid(), &MemoryUser{
+		Email:   "test1@example.com",
+		Account: toAccount(&vmess.Account{Id: uuid1.String()}),
+	})
+	if spec.HasUser(&MemoryUser{
+		Email:   "test1@example.com",
+		Account: toAccount(&vmess.Account{Id: uuid2.String()}),
+	}) {
+		t.Error("has user: ", uuid2)
+	}
+
+	spec.AddUser(&MemoryUser{Email: "test2@example.com"})
+	if !spec.HasUser(&MemoryUser{
+		Email:   "test1@example.com",
+		Account: toAccount(&vmess.Account{Id: uuid1.String()}),
+	}) {
+		t.Error("not having user: ", uuid1)
+	}
+}
+
+func TestPickUser(t *testing.T) {
+	spec := NewServerSpec(net.Destination{}, AlwaysValid(), &MemoryUser{Email: "test1@example.com"}, &MemoryUser{Email: "test2@example.com"}, &MemoryUser{Email: "test3@example.com"})
+	user := spec.PickUser()
+	if !strings.HasSuffix(user.Email, "@example.com") {
+		t.Error("user: ", user.Email)
+	}
+}

core/xray_test.go

@@ -63,13 +63,17 @@ func TestXrayClose(t *testing.T) {
 		Outbound: []*OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(0),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:  &protocol.User{
+							Port:    uint32(0),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),

features/inbound/inbound.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/serial"
 	"github.com/xtls/xray-core/features"
 )
@@ -19,6 +20,9 @@ type Handler interface {
 	ReceiverSettings() *serial.TypedMessage
 	// Returns the active proxy settings.
 	ProxySettings() *serial.TypedMessage
+
+	// Deprecated: Do not use in new code.
+	GetRandomInboundProxy() (interface{}, net.Port, int)
 }
 
 // Manager is a feature that manages InboundHandlers.

features/routing/context.go

@@ -49,4 +49,7 @@ type Context interface {
 
 	// GetSkipDNSResolve returns a flag switch for weather skip dns resolve during route pick.
 	GetSkipDNSResolve() bool
+
+	// GetError returns errors during route pick, e.g., built-in-dns fail to resolve domain to IP
+	GetError() error
 }

features/routing/dns/context.go

@@ -1,8 +1,6 @@
 package dns
 
 import (
-	"context"
-
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/features/dns"
@@ -14,6 +12,7 @@ type ResolvableContext struct {
 	routing.Context
 	dnsClient   dns.Client
 	resolvedIPs []net.IP
+	lookupError error
 }
 
 // GetTargetIPs overrides original routing.Context's implementation.
@@ -22,6 +21,10 @@ func (ctx *ResolvableContext) GetTargetIPs() []net.IP {
 		return ctx.resolvedIPs
 	}
 
+	if ips := ctx.Context.GetTargetIPs(); len(ips) != 0 {
+		return ips
+	}
+
 	if domain := ctx.GetTargetDomain(); len(domain) != 0 {
 		ips, _, err := ctx.dnsClient.LookupIP(domain, dns.IPOption{
 			IPv4Enable: true,
@@ -32,16 +35,17 @@ func (ctx *ResolvableContext) GetTargetIPs() []net.IP {
 			ctx.resolvedIPs = ips
 			return ips
 		}
-		errors.LogInfoInner(context.Background(), err, "resolve ip for ", domain)
+		ctx.lookupError = errors.New("resolve ip for ", domain).Base(err)
-	}
-
-	if ips := ctx.Context.GetTargetIPs(); len(ips) != 0 {
-		return ips
 	}
 
 	return nil
 }
 
+// GetError override original routing.Context's implementation.
+func (ctx *ResolvableContext) GetError() error {
+	return ctx.lookupError
+}
+
 // ContextWithDNSClient creates a new routing context with domain resolving capability.
 // Resolved domain IPs can be retrieved by GetTargetIPs().
 func ContextWithDNSClient(ctx routing.Context, client dns.Client) routing.Context {

features/routing/session/context.go

@@ -152,6 +152,11 @@ func (ctx *Context) GetSkipDNSResolve() bool {
 	return ctx.Content.SkipDNSResolve
 }
 
+// GetError implements routing.Context.
+func (ctx *Context) GetError() error {
+	return nil
+}
+
 // AsRoutingContext creates a context from context.context with session info.
 func AsRoutingContext(ctx context.Context) routing.Context {
 	outbounds := session.OutboundsFromContext(ctx)

infra/conf/http.go

@@ -68,19 +68,12 @@ func (v *HTTPClientConfig) Build() (proto.Message, error) {
 			{
 				Address: v.Address,
 				Port:    v.Port,
+				Users:   []json.RawMessage{{}},
 			},
 		}
-		if len(v.Username) > 0 {
-			v.Servers[0].Users = []json.RawMessage{{}}
-		}
 	}
-	if len(v.Servers) != 1 {
+	config.Server = make([]*protocol.ServerEndpoint, len(v.Servers))
-		return nil, errors.New(`HTTP settings: "servers" should have one and only one member. Multiple endpoints in "servers" should use multiple HTTP outbounds and routing balancer instead`)
+	for idx, serverConfig := range v.Servers {
-	}
-	for _, serverConfig := range v.Servers {
-		if len(serverConfig.Users) > 1 {
-			return nil, errors.New(`HTTP servers: "users" should have one member at most. Multiple members in "users" should use multiple HTTP outbounds and routing balancer instead`)
-		}
 		server := &protocol.ServerEndpoint{
 			Address: serverConfig.Address.Build(),
 			Port:    uint32(serverConfig.Port),
@@ -105,11 +98,9 @@ func (v *HTTPClientConfig) Build() (proto.Message, error) {
 				}
 			}
 			user.Account = serial.ToTypedMessage(account.Build())
-			server.User = user
+			server.User = append(server.User, user)
-			break
 		}
-		config.Server = server
+		config.Server[idx] = server
-		break
 	}
 	config.Header = make([]*http.Header, 0, 32)
 	for key, value := range v.Headers {

infra/conf/shadowsocks.go

@@ -172,16 +172,16 @@ type ShadowsocksServerTarget struct {
 }
 
 type ShadowsocksClientConfig struct {
-	Address    *Address                   `json:"address"`
+	Address    *Address `json:"address"`
-	Port       uint16                     `json:"port"`
+	Port       uint16   `json:"port"`
-	Level      byte                       `json:"level"`
+	Level      byte     `json:"level"`
-	Email      string                     `json:"email"`
+	Email      string   `json:"email"`
-	Cipher     string                     `json:"method"`
+	Cipher     string   `json:"method"`
-	Password   string                     `json:"password"`
+	Password   string   `json:"password"`
-	IVCheck    bool                       `json:"ivCheck"`
+	IVCheck    bool     `json:"ivCheck"`
-	UoT        bool                       `json:"uot"`
+	UoT        bool     `json:"uot"`
-	UoTVersion int                        `json:"uotVersion"`
+	UoTVersion int      `json:"uotVersion"`
-	Servers    []*ShadowsocksServerTarget `json:"servers"`
+	Servers []*ShadowsocksServerTarget `json:"servers"`
 }
 
 func (v *ShadowsocksClientConfig) Build() (proto.Message, error) {
@@ -200,8 +200,8 @@ func (v *ShadowsocksClientConfig) Build() (proto.Message, error) {
 			},
 		}
 	}
-	if len(v.Servers) != 1 {
+	if len(v.Servers) == 0 {
-		return nil, errors.New(`Shadowsocks settings: "servers" should have one and only one member. Multiple endpoints in "servers" should use multiple Shadowsocks outbounds and routing balancer instead`)
+		return nil, errors.New("0 Shadowsocks server configured.")
 	}
 
 	if len(v.Servers) == 1 {
@@ -229,7 +229,8 @@ func (v *ShadowsocksClientConfig) Build() (proto.Message, error) {
 	}
 
 	config := new(shadowsocks.ClientConfig)
-	for _, server := range v.Servers {
+	serverSpecs := make([]*protocol.ServerEndpoint, len(v.Servers))
+	for idx, server := range v.Servers {
 		if C.Contains(shadowaead_2022.List, server.Cipher) {
 			return nil, errors.New("Shadowsocks 2022 accept no multi servers")
 		}
@@ -255,16 +256,19 @@ func (v *ShadowsocksClientConfig) Build() (proto.Message, error) {
 		ss := &protocol.ServerEndpoint{
 			Address: server.Address.Build(),
 			Port:    uint32(server.Port),
-			User:    &protocol.User{
+			User: []*protocol.User{
-				Level:   uint32(server.Level),
+				{
-				Email:   server.Email,
+					Level:   uint32(server.Level),
-				Account: serial.ToTypedMessage(account),
+					Email:   server.Email,
+					Account: serial.ToTypedMessage(account),
+				},
 			},
 		}
 
-		config.Server = ss
+		serverSpecs[idx] = ss
-		break
 	}
 
+	config.Server = serverSpecs
+
 	return config, nil
 }

infra/conf/socks.go

@@ -86,19 +86,12 @@ func (v *SocksClientConfig) Build() (proto.Message, error) {
 			{
 				Address: v.Address,
 				Port:    v.Port,
+				Users:   []json.RawMessage{{}},
 			},
 		}
-		if len(v.Username) > 0 {
-			v.Servers[0].Users = []json.RawMessage{{}}
-		}
 	}
-	if len(v.Servers) != 1 {
+	config.Server = make([]*protocol.ServerEndpoint, len(v.Servers))
-		return nil, errors.New(`SOCKS settings: "servers" should have one and only one member. Multiple endpoints in "servers" should use multiple SOCKS outbounds and routing balancer instead`)
+	for idx, serverConfig := range v.Servers {
-	}
-	for _, serverConfig := range v.Servers {
-		if len(serverConfig.Users) > 1 {
-			return nil, errors.New(`SOCKS servers: "users" should have one member at most. Multiple members in "users" should use multiple SOCKS outbounds and routing balancer instead`)
-		}
 		server := &protocol.ServerEndpoint{
 			Address: serverConfig.Address.Build(),
 			Port:    uint32(serverConfig.Port),
@@ -123,11 +116,9 @@ func (v *SocksClientConfig) Build() (proto.Message, error) {
 				}
 			}
 			user.Account = serial.ToTypedMessage(account.Build())
-			server.User = user
+			server.User = append(server.User, user)
-			break
 		}
-		config.Server = server
+		config.Server[idx] = server
-		break
 	}
 	return config, nil
 }

infra/conf/socks_test.go

@@ -65,19 +65,23 @@ func TestSocksOutboundConfig(t *testing.T) {
 			}`,
 			Parser: loadJSON(creator),
 			Output: &socks.ClientConfig{
-				Server: &protocol.ServerEndpoint{
+				Server: []*protocol.ServerEndpoint{
-					Address: &net.IPOrDomain{
+					{
-						Address: &net.IPOrDomain_Ip{
+						Address: &net.IPOrDomain{
-							Ip: []byte{127, 0, 0, 1},
+							Address: &net.IPOrDomain_Ip{
+								Ip: []byte{127, 0, 0, 1},
+							},
+						},
+						Port: 1234,
+						User: []*protocol.User{
+							{
+								Email: "test@email.com",
+								Account: serial.ToTypedMessage(&socks.Account{
+									Username: "test user",
+									Password: "test pass",
+								}),
+							},
 						},
-					},
-					Port: 1234,
-					User: &protocol.User{
-						Email: "test@email.com",
-						Account: serial.ToTypedMessage(&socks.Account{
-							Username: "test user",
-							Password: "test pass",
-						}),
 					},
 				},
 			},
@@ -92,19 +96,23 @@ func TestSocksOutboundConfig(t *testing.T) {
 			}`,
 			Parser: loadJSON(creator),
 			Output: &socks.ClientConfig{
-				Server: &protocol.ServerEndpoint{
+				Server: []*protocol.ServerEndpoint{
-					Address: &net.IPOrDomain{
+					{
-						Address: &net.IPOrDomain_Ip{
+						Address: &net.IPOrDomain{
-							Ip: []byte{127, 0, 0, 1},
+							Address: &net.IPOrDomain_Ip{
+								Ip: []byte{127, 0, 0, 1},
+							},
+						},
+						Port: 1234,
+						User: []*protocol.User{
+							{
+								Email: "test@email.com",
+								Account: serial.ToTypedMessage(&socks.Account{
+									Username: "test user",
+									Password: "test pass",
+								}),
+							},
 						},
-					},
-					Port: 1234,
-					User: &protocol.User{
-						Email: "test@email.com",
-						Account: serial.ToTypedMessage(&socks.Account{
-							Username: "test user",
-							Password: "test pass",
-						}),
 					},
 				},
 			},

infra/conf/trojan.go

@@ -28,13 +28,13 @@ type TrojanServerTarget struct {
 
 // TrojanClientConfig is configuration of trojan servers
 type TrojanClientConfig struct {
-	Address  *Address              `json:"address"`
+	Address  *Address `json:"address"`
-	Port     uint16                `json:"port"`
+	Port     uint16   `json:"port"`
-	Level    byte                  `json:"level"`
+	Level    byte     `json:"level"`
-	Email    string                `json:"email"`
+	Email    string   `json:"email"`
-	Password string                `json:"password"`
+	Password string   `json:"password"`
-	Flow     string                `json:"flow"`
+	Flow     string   `json:"flow"`
-	Servers  []*TrojanServerTarget `json:"servers"`
+	Servers []*TrojanServerTarget `json:"servers"`
 }
 
 // Build implements Buildable
@@ -51,13 +51,15 @@ func (c *TrojanClientConfig) Build() (proto.Message, error) {
 			},
 		}
 	}
-	if len(c.Servers) != 1 {
+	if len(c.Servers) == 0 {
-		return nil, errors.New(`Trojan settings: "servers" should have one and only one member. Multiple endpoints in "servers" should use multiple Trojan outbounds and routing balancer instead`)
+		return nil, errors.New("0 Trojan server configured.")
 	}
 
-	config := &trojan.ClientConfig{}
+	config := &trojan.ClientConfig{
+		Server: make([]*protocol.ServerEndpoint, len(c.Servers)),
+	}
 
-	for _, rec := range c.Servers {
+	for idx, rec := range c.Servers {
 		if rec.Address == nil {
 			return nil, errors.New("Trojan server address is not set.")
 		}
@@ -71,19 +73,19 @@ func (c *TrojanClientConfig) Build() (proto.Message, error) {
 			return nil, errors.PrintRemovedFeatureError(`Flow for Trojan`, ``)
 		}
 
-		config.Server = &protocol.ServerEndpoint{
+		config.Server[idx] = &protocol.ServerEndpoint{
 			Address: rec.Address.Build(),
 			Port:    uint32(rec.Port),
-			User:    &protocol.User{
+			User: []*protocol.User{
-				Level: uint32(rec.Level),
+				{
-				Email: rec.Email,
+					Level: uint32(rec.Level),
-				Account: serial.ToTypedMessage(&trojan.Account{
+					Email: rec.Email,
-					Password: rec.Password,
+					Account: serial.ToTypedMessage(&trojan.Account{
-				}),
+						Password: rec.Password,
+					}),
+				},
 			},
 		}
-
-		break
 	}
 
 	return config, nil

infra/conf/vless.go

@@ -228,20 +228,22 @@ func (c *VLessOutboundConfig) Build() (proto.Message, error) {
 		}
 	}
 	if len(c.Vnext) != 1 {
-		return nil, errors.New(`VLESS settings: "vnext" should have one and only one member. Multiple endpoints in "vnext" should use multiple VLESS outbounds and routing balancer instead`)
+		return nil, errors.New(`VLESS settings: "vnext" should have one and only one member`)
 	}
-	for _, rec := range c.Vnext {
+	config.Vnext = make([]*protocol.ServerEndpoint, len(c.Vnext))
+	for idx, rec := range c.Vnext {
 		if rec.Address == nil {
 			return nil, errors.New(`VLESS vnext: "address" is not set`)
 		}
 		if len(rec.Users) != 1 {
-			return nil, errors.New(`VLESS vnext: "users" should have one and only one member. Multiple members in "users" should use multiple VLESS outbounds and routing balancer instead`)
+			return nil, errors.New(`VLESS vnext: "users" should have one and only one member`)
 		}
 		spec := &protocol.ServerEndpoint{
 			Address: rec.Address.Build(),
 			Port:    uint32(rec.Port),
+			User:    make([]*protocol.User, len(rec.Users)),
 		}
-		for _, rawUser := range rec.Users {
+		for idx, rawUser := range rec.Users {
 			user := new(protocol.User)
 			if c.Address != nil {
 				user.Level = c.Level
@@ -325,11 +327,9 @@ func (c *VLessOutboundConfig) Build() (proto.Message, error) {
 			}
 
 			user.Account = serial.ToTypedMessage(account)
-			spec.User = user
+			spec.User[idx] = user
-			break
 		}
-		config.Vnext = spec
+		config.Vnext[idx] = spec
-		break
 	}
 
 	return config, nil

infra/conf/vless_test.go

@@ -35,20 +35,24 @@ func TestVLessOutbound(t *testing.T) {
 			}`,
 			Parser: loadJSON(creator),
 			Output: &outbound.Config{
-				Vnext: &protocol.ServerEndpoint{
+				Vnext: []*protocol.ServerEndpoint{
-					Address: &net.IPOrDomain{
+					{
-						Address: &net.IPOrDomain_Domain{
+						Address: &net.IPOrDomain{
-							Domain: "example.com",
+							Address: &net.IPOrDomain_Domain{
+								Domain: "example.com",
+							},
+						},
+						Port: 443,
+						User: []*protocol.User{
+							{
+								Account: serial.ToTypedMessage(&vless.Account{
+									Id:         "27848739-7e62-4138-9fd3-098a63964b6b",
+									Flow:       "xtls-rprx-vision-udp443",
+									Encryption: "none",
+								}),
+								Level: 0,
+							},
 						},
-					},
-					Port: 443,
-					User: &protocol.User{
-						Account: serial.ToTypedMessage(&vless.Account{
-							Id:         "27848739-7e62-4138-9fd3-098a63964b6b",
-							Flow:       "xtls-rprx-vision-udp443",
-							Encryption: "none",
-						}),
-						Level: 0,
 					},
 				},
 			},
@@ -64,20 +68,24 @@ func TestVLessOutbound(t *testing.T) {
 			}`,
 			Parser: loadJSON(creator),
 			Output: &outbound.Config{
-				Vnext: &protocol.ServerEndpoint{
+				Vnext: []*protocol.ServerEndpoint{
-					Address: &net.IPOrDomain{
+					{
-						Address: &net.IPOrDomain_Domain{
+						Address: &net.IPOrDomain{
-							Domain: "example.com",
+							Address: &net.IPOrDomain_Domain{
+								Domain: "example.com",
+							},
+						},
+						Port: 443,
+						User: []*protocol.User{
+							{
+								Account: serial.ToTypedMessage(&vless.Account{
+									Id:         "27848739-7e62-4138-9fd3-098a63964b6b",
+									Flow:       "xtls-rprx-vision-udp443",
+									Encryption: "none",
+								}),
+								Level: 0,
+							},
 						},
-					},
-					Port: 443,
-					User: &protocol.User{
-						Account: serial.ToTypedMessage(&vless.Account{
-							Id:         "27848739-7e62-4138-9fd3-098a63964b6b",
-							Flow:       "xtls-rprx-vision-udp443",
-							Encryption: "none",
-						}),
-						Level: 0,
 					},
 				},
 			},

infra/conf/vmess.go

@@ -46,6 +46,17 @@ func (a *VMessAccount) Build() *vmess.Account {
 	}
 }
 
+type VMessDetourConfig struct {
+	ToTag string `json:"to"`
+}
+
+// Build implements Buildable
+func (c *VMessDetourConfig) Build() *inbound.DetourConfig {
+	return &inbound.DetourConfig{
+		To: c.ToTag,
+	}
+}
+
 type VMessDefaultConfig struct {
 	Level byte `json:"level"`
 }
@@ -60,6 +71,7 @@ func (c *VMessDefaultConfig) Build() *inbound.DefaultConfig {
 type VMessInboundConfig struct {
 	Users        []json.RawMessage   `json:"clients"`
 	Defaults     *VMessDefaultConfig `json:"default"`
+	DetourConfig *VMessDetourConfig  `json:"detour"`
 }
 
 // Build implements Buildable
@@ -70,6 +82,10 @@ func (c *VMessInboundConfig) Build() (proto.Message, error) {
 		config.Default = c.Defaults.Build()
 	}
 
+	if c.DetourConfig != nil {
+		config.Detour = c.DetourConfig.Build()
+	}
+
 	config.User = make([]*protocol.User, len(c.Users))
 	for idx, rawData := range c.Users {
 		user := new(protocol.User)
@@ -123,15 +139,16 @@ func (c *VMessOutboundConfig) Build() (proto.Message, error) {
 			},
 		}
 	}
-	if len(c.Receivers) != 1 {
+	if len(c.Receivers) == 0 {
-		return nil, errors.New(`VMess settings: "vnext" should have one and only one member. Multiple endpoints in "vnext" should use multiple VMess outbounds and routing balancer instead`)
+		return nil, errors.New("0 VMess receiver configured")
 	}
-	for _, rec := range c.Receivers {
+	serverSpecs := make([]*protocol.ServerEndpoint, len(c.Receivers))
-		if len(rec.Users) != 1 {
+	for idx, rec := range c.Receivers {
-			return nil, errors.New(`VMess vnext: "users" should have one and only one member. Multiple members in "users" should use multiple VMess outbounds and routing balancer instead`)
+		if len(rec.Users) == 0 {
+			return nil, errors.New("0 user configured for VMess outbound")
 		}
 		if rec.Address == nil {
-			return nil, errors.New(`VMess vnext: "address" is not set`)
+			return nil, errors.New("address is not set in VMess outbound config")
 		}
 		spec := &protocol.ServerEndpoint{
 			Address: rec.Address.Build(),
@@ -165,11 +182,10 @@ func (c *VMessOutboundConfig) Build() (proto.Message, error) {
 			account.ID = u.String()
 
 			user.Account = serial.ToTypedMessage(account.Build())
-			spec.User = user
+			spec.User = append(spec.User, user)
-			break
 		}
-		config.Receiver = spec
+		serverSpecs[idx] = spec
-		break
 	}
+	config.Receiver = serverSpecs
 	return config, nil
 }

infra/conf/vmess_test.go

@@ -34,22 +34,26 @@ func TestVMessOutbound(t *testing.T) {
 			}`,
 			Parser: loadJSON(creator),
 			Output: &outbound.Config{
-				Receiver: &protocol.ServerEndpoint{
+				Receiver: []*protocol.ServerEndpoint{
-					Address: &net.IPOrDomain{
+					{
-						Address: &net.IPOrDomain_Ip{
+						Address: &net.IPOrDomain{
-							Ip: []byte{127, 0, 0, 1},
+							Address: &net.IPOrDomain_Ip{
-						},
+								Ip: []byte{127, 0, 0, 1},
-					},
-					Port: 80,
-					User: &protocol.User{
-						Email: "love@example.com",
-						Level: 255,
-						Account: serial.ToTypedMessage(&vmess.Account{
-							Id: "e641f5ad-9397-41e3-bf1a-e8740dfed019",
-							SecuritySettings: &protocol.SecurityConfig{
-								Type: protocol.SecurityType_AUTO,
 							},
-						}),
+						},
+						Port: 80,
+						User: []*protocol.User{
+							{
+								Email: "love@example.com",
+								Level: 255,
+								Account: serial.ToTypedMessage(&vmess.Account{
+									Id: "e641f5ad-9397-41e3-bf1a-e8740dfed019",
+									SecuritySettings: &protocol.SecurityConfig{
+										Type: protocol.SecurityType_AUTO,
+									},
+								}),
+							},
+						},
 					},
 				},
 			},
@@ -64,22 +68,26 @@ func TestVMessOutbound(t *testing.T) {
 			}`,
 			Parser: loadJSON(creator),
 			Output: &outbound.Config{
-				Receiver: &protocol.ServerEndpoint{
+				Receiver: []*protocol.ServerEndpoint{
-					Address: &net.IPOrDomain{
+					{
-						Address: &net.IPOrDomain_Ip{
+						Address: &net.IPOrDomain{
-							Ip: []byte{127, 0, 0, 1},
+							Address: &net.IPOrDomain_Ip{
-						},
+								Ip: []byte{127, 0, 0, 1},
-					},
-					Port: 80,
-					User: &protocol.User{
-						Email: "love@example.com",
-						Level: 255,
-						Account: serial.ToTypedMessage(&vmess.Account{
-							Id: "e641f5ad-9397-41e3-bf1a-e8740dfed019",
-							SecuritySettings: &protocol.SecurityConfig{
-								Type: protocol.SecurityType_AUTO,
 							},
-						}),
+						},
+						Port: 80,
+						User: []*protocol.User{
+							{
+								Email: "love@example.com",
+								Level: 255,
+								Account: serial.ToTypedMessage(&vmess.Account{
+									Id: "e641f5ad-9397-41e3-bf1a-e8740dfed019",
+									SecuritySettings: &protocol.SecurityConfig{
+										Type: protocol.SecurityType_AUTO,
+									},
+								}),
+							},
+						},
 					},
 				},
 			},
@@ -105,7 +113,11 @@ func TestVMessInbound(t *testing.T) {
 				],
 				"default": {
 					"level": 0
-				}
+				},
+				"detour": {
+					"to": "tag_to_detour"
+				},
+				"disableInsecureEncryption": true
 			}`,
 			Parser: loadJSON(creator),
 			Output: &inbound.Config{
@@ -124,6 +136,9 @@ func TestVMessInbound(t *testing.T) {
 				Default: &inbound.DefaultConfig{
 					Level: 0,
 				},
+				Detour: &inbound.DetourConfig{
+					To: "tag_to_detour",
+				},
 			},
 		},
 	})

infra/conf/xray.go

@@ -3,6 +3,7 @@ package conf
 import (
 	"context"
 	"encoding/json"
+	"fmt"
 	"log"
 	"os"
 	"path/filepath"
@@ -119,12 +120,47 @@ func (m *MuxConfig) Build() (*proxyman.MultiplexingConfig, error) {
 	}, nil
 }
 
+type InboundDetourAllocationConfig struct {
+	Strategy    string  `json:"strategy"`
+	Concurrency *uint32 `json:"concurrency"`
+	RefreshMin  *uint32 `json:"refresh"`
+}
+
+// Build implements Buildable.
+func (c *InboundDetourAllocationConfig) Build() (*proxyman.AllocationStrategy, error) {
+	config := new(proxyman.AllocationStrategy)
+	switch strings.ToLower(c.Strategy) {
+	case "always":
+		config.Type = proxyman.AllocationStrategy_Always
+	case "random":
+		config.Type = proxyman.AllocationStrategy_Random
+	case "external":
+		config.Type = proxyman.AllocationStrategy_External
+	default:
+		return nil, errors.New("unknown allocation strategy: ", c.Strategy)
+	}
+	if c.Concurrency != nil {
+		config.Concurrency = &proxyman.AllocationStrategy_AllocationStrategyConcurrency{
+			Value: *c.Concurrency,
+		}
+	}
+
+	if c.RefreshMin != nil {
+		config.Refresh = &proxyman.AllocationStrategy_AllocationStrategyRefresh{
+			Value: *c.RefreshMin,
+		}
+	}
+
+	return config, nil
+}
+
 type InboundDetourConfig struct {
 	Protocol       string                         `json:"protocol"`
 	PortList       *PortList                      `json:"port"`
 	ListenOn       *Address                       `json:"listen"`
 	Settings       *json.RawMessage               `json:"settings"`
 	Tag            string                         `json:"tag"`
+	Allocation     *InboundDetourAllocationConfig `json:"allocate"`
 	StreamSetting  *StreamConfig                  `json:"streamSettings"`
 	SniffingConfig *SniffingConfig                `json:"sniffing"`
 }
@@ -161,6 +197,30 @@ func (c *InboundDetourConfig) Build() (*core.InboundHandlerConfig, error) {
 		}
 	}
 
+	if c.Allocation != nil {
+		concurrency := -1
+		if c.Allocation.Concurrency != nil && c.Allocation.Strategy == "random" {
+			concurrency = int(*c.Allocation.Concurrency)
+		}
+		portRange := 0
+
+		for _, pr := range c.PortList.Range {
+			portRange += int(pr.To - pr.From + 1)
+		}
+		if concurrency >= 0 && concurrency >= portRange {
+			var ports strings.Builder
+			for _, pr := range c.PortList.Range {
+				fmt.Fprintf(&ports, "%d-%d ", pr.From, pr.To)
+			}
+			return nil, errors.New("not enough ports. concurrency = ", concurrency, " ports: ", ports.String())
+		}
+
+		as, err := c.Allocation.Build()
+		if err != nil {
+			return nil, err
+		}
+		receiverSettings.AllocationStrategy = as
+	}
 	if c.StreamSetting != nil {
 		ss, err := c.StreamSetting.Build()
 		if err != nil {

infra/conf/xray_test.go

@@ -58,6 +58,10 @@ func TestXrayConfig(t *testing.T) {
 					},
 					"protocol": "vmess",
 					"port": "443-500",
+					"allocate": {
+						"strategy": "random",
+						"concurrency": 3
+					},
 					"settings": {
 						"clients": [
 							{
@@ -119,6 +123,12 @@ func TestXrayConfig(t *testing.T) {
 								From: 443,
 								To:   500,
 							}}},
+							AllocationStrategy: &proxyman.AllocationStrategy{
+								Type: proxyman.AllocationStrategy_Random,
+								Concurrency: &proxyman.AllocationStrategy_AllocationStrategyConcurrency{
+									Value: 3,
+								},
+							},
 							StreamSettings: &internet.StreamConfig{
 								ProtocolName: "websocket",
 								TransportSettings: []*internet.TransportConfig{

proxy/http/client.go

@@ -31,7 +31,7 @@ import (
 )
 
 type Client struct {
-	server        *protocol.ServerSpec
+	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
 	header        []*Header
 }
@@ -48,17 +48,21 @@ var (
 
 // NewClient create a new http client based on the given config.
 func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
-	if config.Server == nil {
+	serverList := protocol.NewServerList()
-		return nil, errors.New(`no target server found`)
+	for _, rec := range config.Server {
+		s, err := protocol.NewServerSpecFromPB(rec)
+		if err != nil {
+			return nil, errors.New("failed to get server spec").Base(err)
+		}
+		serverList.AddServer(s)
 	}
-	server, err := protocol.NewServerSpecFromPB(config.Server)
+	if serverList.Size() == 0 {
-	if err != nil {
+		return nil, errors.New("0 target server")
-		return nil, errors.New("failed to get server spec").Base(err)
 	}
 
 	v := core.MustFromContext(ctx)
 	return &Client{
-		server:        server,
+		serverPicker:  protocol.NewRoundRobinServerPicker(serverList),
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
 		header:        config.Header,
 	}, nil
@@ -80,9 +84,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 		return errors.New("UDP is not supported by HTTP outbound")
 	}
 
-	server := c.server
+	var user *protocol.MemoryUser
-	dest := server.Destination
-	user := server.User
 	var conn stat.Connection
 
 	mbuf, _ := link.Reader.ReadMultiBuffer()
@@ -100,6 +102,10 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	}
 
 	if err := retry.ExponentialBackoff(5, 100).On(func() error {
+		server := c.serverPicker.PickServer()
+		dest := server.Destination()
+		user = server.PickUser()
+
 		netConn, err := setUpHTTPTunnel(ctx, dest, targetAddr, user, dialer, header, firstPayload)
 		if netConn != nil {
 			if _, ok := netConn.(*http2Conn); !ok {

proxy/http/config.pb.go

@@ -196,8 +196,8 @@ type ClientConfig struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Sever is a list of HTTP server addresses.
-	Server *protocol.ServerEndpoint `protobuf:"bytes,1,opt,name=server,proto3" json:"server,omitempty"`
+	Server []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
-	Header []*Header                `protobuf:"bytes,2,rep,name=header,proto3" json:"header,omitempty"`
+	Header []*Header                  `protobuf:"bytes,2,rep,name=header,proto3" json:"header,omitempty"`
 }
 
 func (x *ClientConfig) Reset() {
@@ -230,7 +230,7 @@ func (*ClientConfig) Descriptor() ([]byte, []int) {
 	return file_proxy_http_config_proto_rawDescGZIP(), []int{3}
 }
 
-func (x *ClientConfig) GetServer() *protocol.ServerEndpoint {
+func (x *ClientConfig) GetServer() []*protocol.ServerEndpoint {
 	if x != nil {
 		return x.Server
 	}
@@ -275,7 +275,7 @@ var file_proxy_http_config_proto_rawDesc = []byte{
 	0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05,
 	0x76, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x7d, 0x0a, 0x0c, 0x43, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x43,
 	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x3c, 0x0a, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x18,
-	0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d,
+	0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d,
 	0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x53, 0x65, 0x72,
 	0x76, 0x65, 0x72, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x52, 0x06, 0x73, 0x65, 0x72,
 	0x76, 0x65, 0x72, 0x12, 0x2f, 0x0a, 0x06, 0x68, 0x65, 0x61, 0x64, 0x65, 0x72, 0x18, 0x02, 0x20,

proxy/http/config.proto

@@ -28,6 +28,6 @@ message Header {
 // ClientConfig is the protobuf config for HTTP proxy client.
 message ClientConfig {
   // Sever is a list of HTTP server addresses.
-  xray.common.protocol.ServerEndpoint server = 1;
+  repeated xray.common.protocol.ServerEndpoint server = 1;
   repeated Header header = 2;
 }

proxy/shadowsocks/client.go

@@ -22,23 +22,27 @@ import (
 
 // Client is a inbound handler for Shadowsocks protocol
 type Client struct {
-	server        *protocol.ServerSpec
+	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
 }
 
 // NewClient create a new Shadowsocks client.
 func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
-	if config.Server == nil {
+	serverList := protocol.NewServerList()
-		return nil, errors.New(`no target server found`)
+	for _, rec := range config.Server {
+		s, err := protocol.NewServerSpecFromPB(rec)
+		if err != nil {
+			return nil, errors.New("failed to parse server spec").Base(err)
+		}
+		serverList.AddServer(s)
 	}
-	server, err := protocol.NewServerSpecFromPB(config.Server)
+	if serverList.Size() == 0 {
-	if err != nil {
+		return nil, errors.New("0 server")
-		return nil, errors.New("failed to get server spec").Base(err)
 	}
 
 	v := core.MustFromContext(ctx)
 	client := &Client{
-		server:        server,
+		serverPicker:  protocol.NewRoundRobinServerPicker(serverList),
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
 	}
 	return client, nil
@@ -56,12 +60,13 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	destination := ob.Target
 	network := destination.Network
 
-	server := c.server
+	var server *protocol.ServerSpec
-	dest := server.Destination
-	dest.Network = network
 	var conn stat.Connection
 
 	err := retry.ExponentialBackoff(5, 100).On(func() error {
+		server = c.serverPicker.PickServer()
+		dest := server.Destination()
+		dest.Network = network
 		rawConn, err := dialer.Dial(ctx, dest)
 		if err != nil {
 			return err
@@ -73,7 +78,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	if err != nil {
 		return errors.New("failed to find an available destination").AtWarning().Base(err)
 	}
-	errors.LogInfo(ctx, "tunneling request to ", destination, " via ", network, ":", server.Destination.NetAddr())
+	errors.LogInfo(ctx, "tunneling request to ", destination, " via ", network, ":", server.Destination().NetAddr())
 
 	defer conn.Close()
 
@@ -88,7 +93,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 		request.Command = protocol.RequestCommandUDP
 	}
 
-	user := server.User
+	user := server.PickUser()
 	_, ok := user.Account.(*MemoryAccount)
 	if !ok {
 		return errors.New("user account is not valid")

proxy/shadowsocks/config.pb.go

@@ -199,7 +199,7 @@ type ClientConfig struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Server *protocol.ServerEndpoint `protobuf:"bytes,1,opt,name=server,proto3" json:"server,omitempty"`
+	Server []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
 }
 
 func (x *ClientConfig) Reset() {
@@ -232,7 +232,7 @@ func (*ClientConfig) Descriptor() ([]byte, []int) {
 	return file_proxy_shadowsocks_config_proto_rawDescGZIP(), []int{2}
 }
 
-func (x *ClientConfig) GetServer() *protocol.ServerEndpoint {
+func (x *ClientConfig) GetServer() []*protocol.ServerEndpoint {
 	if x != nil {
 		return x.Server
 	}
@@ -268,7 +268,7 @@ var file_proxy_shadowsocks_config_proto_rawDesc = []byte{
 	0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x6e, 0x65, 0x74, 0x2e, 0x4e,
 	0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x52, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x22,
 	0x4c, 0x0a, 0x0c, 0x43, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12,
-	0x3c, 0x0a, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32,
+	0x3c, 0x0a, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32,
 	0x24, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72,
 	0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x45, 0x6e, 0x64,
 	0x70, 0x6f, 0x69, 0x6e, 0x74, 0x52, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x2a, 0x74, 0x0a,

proxy/shadowsocks/config.proto

@@ -32,5 +32,5 @@ message ServerConfig {
 }
 
 message ClientConfig {
-  xray.common.protocol.ServerEndpoint server = 1;
+  repeated xray.common.protocol.ServerEndpoint server = 1;
 }

proxy/socks/client.go

@@ -22,23 +22,27 @@ import (
 
 // Client is a Socks5 client.
 type Client struct {
-	server        *protocol.ServerSpec
+	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
 }
 
 // NewClient create a new Socks5 client based on the given config.
 func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
-	if config.Server == nil {
+	serverList := protocol.NewServerList()
-		return nil, errors.New(`no target server found`)
+	for _, rec := range config.Server {
+		s, err := protocol.NewServerSpecFromPB(rec)
+		if err != nil {
+			return nil, errors.New("failed to get server spec").Base(err)
+		}
+		serverList.AddServer(s)
 	}
-	server, err := protocol.NewServerSpecFromPB(config.Server)
+	if serverList.Size() == 0 {
-	if err != nil {
+		return nil, errors.New("0 target server")
-		return nil, errors.New("failed to get server spec").Base(err)
 	}
 
 	v := core.MustFromContext(ctx)
 	c := &Client{
-		server:        server,
+		serverPicker:  protocol.NewRoundRobinServerPicker(serverList),
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
 	}
 
@@ -58,12 +62,15 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	destination := ob.Target
 
 	// Outbound server.
-	server := c.server
+	var server *protocol.ServerSpec
-	dest := server.Destination
+	// Outbound server's destination.
+	var dest net.Destination
 	// Connection to the outbound server.
 	var conn stat.Connection
 
 	if err := retry.ExponentialBackoff(5, 100).On(func() error {
+		server = c.serverPicker.PickServer()
+		dest = server.Destination()
 		rawConn, err := dialer.Dial(ctx, dest)
 		if err != nil {
 			return err
@@ -94,7 +101,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 		request.Command = protocol.RequestCommandUDP
 	}
 
-	user := server.User
+	user := server.PickUser()
 	if user != nil {
 		request.User = user
 		p = c.policyManager.ForLevel(user.Level)

proxy/socks/config.pb.go

@@ -210,7 +210,7 @@ type ClientConfig struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Sever is a list of Socks server addresses.
-	Server *protocol.ServerEndpoint `protobuf:"bytes,1,opt,name=server,proto3" json:"server,omitempty"`
+	Server []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
 }
 
 func (x *ClientConfig) Reset() {
@@ -243,7 +243,7 @@ func (*ClientConfig) Descriptor() ([]byte, []int) {
 	return file_proxy_socks_config_proto_rawDescGZIP(), []int{2}
 }
 
-func (x *ClientConfig) GetServer() *protocol.ServerEndpoint {
+func (x *ClientConfig) GetServer() []*protocol.ServerEndpoint {
 	if x != nil {
 		return x.Server
 	}
@@ -286,7 +286,7 @@ var file_proxy_socks_config_proto_rawDesc = []byte{
 	0x6c, 0x75, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65,
 	0x3a, 0x02, 0x38, 0x01, 0x22, 0x4c, 0x0a, 0x0c, 0x43, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x43, 0x6f,
 	0x6e, 0x66, 0x69, 0x67, 0x12, 0x3c, 0x0a, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x18, 0x01,
-	0x20, 0x01, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d,
+	0x20, 0x03, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d,
 	0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x53, 0x65, 0x72, 0x76,
 	0x65, 0x72, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x52, 0x06, 0x73, 0x65, 0x72, 0x76,
 	0x65, 0x72, 0x2a, 0x25, 0x0a, 0x08, 0x41, 0x75, 0x74, 0x68, 0x54, 0x79, 0x70, 0x65, 0x12, 0x0b,

proxy/socks/config.proto

@@ -35,5 +35,5 @@ message ServerConfig {
 // ClientConfig is the protobuf config for Socks client.
 message ClientConfig {
   // Sever is a list of Socks server addresses.
-  xray.common.protocol.ServerEndpoint server = 1;
+  repeated xray.common.protocol.ServerEndpoint server = 1;
 }

proxy/trojan/client.go

@@ -22,23 +22,27 @@ import (
 
 // Client is a inbound handler for trojan protocol
 type Client struct {
-	server        *protocol.ServerSpec
+	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
 }
 
 // NewClient create a new trojan client.
 func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
-	if config.Server == nil {
+	serverList := protocol.NewServerList()
-		return nil, errors.New(`no target server found`)
+	for _, rec := range config.Server {
+		s, err := protocol.NewServerSpecFromPB(rec)
+		if err != nil {
+			return nil, errors.New("failed to parse server spec").Base(err)
+		}
+		serverList.AddServer(s)
 	}
-	server, err := protocol.NewServerSpecFromPB(config.Server)
+	if serverList.Size() == 0 {
-	if err != nil {
+		return nil, errors.New("0 server")
-		return nil, errors.New("failed to get server spec").Base(err)
 	}
 
 	v := core.MustFromContext(ctx)
 	client := &Client{
-		server:        server,
+		serverPicker:  protocol.NewRoundRobinServerPicker(serverList),
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
 	}
 	return client, nil
@@ -56,11 +60,12 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	destination := ob.Target
 	network := destination.Network
 
-	server := c.server
+	var server *protocol.ServerSpec
 	var conn stat.Connection
 
 	err := retry.ExponentialBackoff(5, 100).On(func() error {
-		rawConn, err := dialer.Dial(ctx, server.Destination)
+		server = c.serverPicker.PickServer()
+		rawConn, err := dialer.Dial(ctx, server.Destination())
 		if err != nil {
 			return err
 		}
@@ -71,11 +76,11 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	if err != nil {
 		return errors.New("failed to find an available destination").AtWarning().Base(err)
 	}
-	errors.LogInfo(ctx, "tunneling request to ", destination, " via ", server.Destination.NetAddr())
+	errors.LogInfo(ctx, "tunneling request to ", destination, " via ", server.Destination().NetAddr())
 
 	defer conn.Close()
 
-	user := server.User
+	user := server.PickUser()
 	account, ok := user.Account.(*MemoryAccount)
 	if !ok {
 		return errors.New("user account is not valid")

proxy/trojan/config.pb.go

@@ -156,7 +156,7 @@ type ClientConfig struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Server *protocol.ServerEndpoint `protobuf:"bytes,1,opt,name=server,proto3" json:"server,omitempty"`
+	Server []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
 }
 
 func (x *ClientConfig) Reset() {
@@ -189,7 +189,7 @@ func (*ClientConfig) Descriptor() ([]byte, []int) {
 	return file_proxy_trojan_config_proto_rawDescGZIP(), []int{2}
 }
 
-func (x *ClientConfig) GetServer() *protocol.ServerEndpoint {
+func (x *ClientConfig) GetServer() []*protocol.ServerEndpoint {
 	if x != nil {
 		return x.Server
 	}
@@ -271,7 +271,7 @@ var file_proxy_trojan_config_proto_rawDesc = []byte{
 	0x04, 0x64, 0x65, 0x73, 0x74, 0x12, 0x12, 0x0a, 0x04, 0x78, 0x76, 0x65, 0x72, 0x18, 0x06, 0x20,
 	0x01, 0x28, 0x04, 0x52, 0x04, 0x78, 0x76, 0x65, 0x72, 0x22, 0x4c, 0x0a, 0x0c, 0x43, 0x6c, 0x69,
 	0x65, 0x6e, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x3c, 0x0a, 0x06, 0x73, 0x65, 0x72,
-	0x76, 0x65, 0x72, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79,
+	0x76, 0x65, 0x72, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61, 0x79,
 	0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c,
 	0x2e, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x52,
 	0x06, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x22, 0x7b, 0x0a, 0x0c, 0x53, 0x65, 0x72, 0x76, 0x65,

proxy/trojan/config.proto

@@ -23,7 +23,7 @@ message Fallback {
 }
 
 message ClientConfig {
-  xray.common.protocol.ServerEndpoint server = 1;
+  repeated xray.common.protocol.ServerEndpoint server = 1;
 }
 
 message ServerConfig {

proxy/vless/outbound/config.pb.go

@@ -26,7 +26,7 @@ type Config struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Vnext *protocol.ServerEndpoint `protobuf:"bytes,1,opt,name=vnext,proto3" json:"vnext,omitempty"`
+	Vnext []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=vnext,proto3" json:"vnext,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -59,7 +59,7 @@ func (*Config) Descriptor() ([]byte, []int) {
 	return file_proxy_vless_outbound_config_proto_rawDescGZIP(), []int{0}
 }
 
-func (x *Config) GetVnext() *protocol.ServerEndpoint {
+func (x *Config) GetVnext() []*protocol.ServerEndpoint {
 	if x != nil {
 		return x.Vnext
 	}
@@ -76,7 +76,7 @@ var file_proxy_vless_outbound_config_proto_rawDesc = []byte{
 	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2f,
 	0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x2e, 0x70, 0x72, 0x6f, 0x74,
 	0x6f, 0x22, 0x44, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x3a, 0x0a, 0x05, 0x76,
-	0x6e, 0x65, 0x78, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61,
+	0x6e, 0x65, 0x78, 0x74, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x24, 0x2e, 0x78, 0x72, 0x61,
 	0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f,
 	0x6c, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74,
 	0x52, 0x05, 0x76, 0x6e, 0x65, 0x78, 0x74, 0x42, 0x6d, 0x0a, 0x1d, 0x63, 0x6f, 0x6d, 0x2e, 0x78,

proxy/vless/outbound/config.proto

@@ -9,5 +9,5 @@ option java_multiple_files = true;
 import "common/protocol/server_spec.proto";
 
 message Config {
-  xray.common.protocol.ServerEndpoint vnext = 1;
+  repeated xray.common.protocol.ServerEndpoint vnext = 1;
 }

proxy/vless/outbound/outbound.go

@@ -47,7 +47,8 @@ func init() {
 
 // Handler is an outbound connection handler for VLess protocol.
 type Handler struct {
-	server        *protocol.ServerSpec
+	serverList    *protocol.ServerList
+	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
 	cone          bool
 	encryption    *encryption.ClientInstance
@@ -56,22 +57,24 @@ type Handler struct {
 
 // New creates a new VLess outbound handler.
 func New(ctx context.Context, config *Config) (*Handler, error) {
-	if config.Vnext == nil {
+	serverList := protocol.NewServerList()
-		return nil, errors.New(`no vnext found`)
+	for _, rec := range config.Vnext {
-	}
+		s, err := protocol.NewServerSpecFromPB(rec)
-	server, err := protocol.NewServerSpecFromPB(config.Vnext)
+		if err != nil {
-	if err != nil {
+			return nil, errors.New("failed to parse server spec").Base(err).AtError()
-		return nil, errors.New("failed to get server spec").Base(err).AtError()
+		}
+		serverList.AddServer(s)
 	}
 
 	v := core.MustFromContext(ctx)
 	handler := &Handler{
-		server:        server,
+		serverList:    serverList,
+		serverPicker:  protocol.NewRoundRobinServerPicker(serverList),
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
 		cone:          ctx.Value("cone").(bool),
 	}
 
-	a := handler.server.User.Account.(*vless.MemoryAccount)
+	a := handler.serverPicker.PickServer().PickUser().Account.(*vless.MemoryAccount)
 	if a.Encryption != "" && a.Encryption != "none" {
 		s := strings.Split(a.Encryption, ".")
 		var nfsPKeysBytes [][]byte
@@ -122,12 +125,12 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	}
 	ob.Name = "vless"
 
-	rec := h.server
+	var rec *protocol.ServerSpec
 	var conn stat.Connection
-
 	if err := retry.ExponentialBackoff(5, 200).On(func() error {
+		rec = h.serverPicker.PickServer()
 		var err error
-		conn, err = dialer.Dial(ctx, rec.Destination)
+		conn, err = dialer.Dial(ctx, rec.Destination())
 		if err != nil {
 			return err
 		}
@@ -142,7 +145,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		iConn = statConn.Connection
 	}
 	target := ob.Target
-	errors.LogInfo(ctx, "tunneling request to ", target, " via ", rec.Destination.NetAddr())
+	errors.LogInfo(ctx, "tunneling request to ", target, " via ", rec.Destination().NetAddr())
 
 	if h.encryption != nil {
 		var err error
@@ -169,7 +172,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 
 	request := &protocol.RequestHeader{
 		Version: encoding.Version,
-		User:    rec.User,
+		User:    rec.PickUser(),
 		Command: command,
 		Address: target.Address,
 		Port:    target.Port,

proxy/vmess/encoding/commands.go

@@ -7,7 +7,10 @@ import (
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/common/serial"
+	"github.com/xtls/xray-core/common/uuid"
 )
 
 var (
@@ -26,6 +29,9 @@ func MarshalCommand(command interface{}, writer io.Writer) error {
 	var cmdID byte
 	var factory CommandFactory
 	switch command.(type) {
+	case *protocol.CommandSwitchAccount:
+		factory = new(CommandSwitchAccountFactory)
+		cmdID = 1
 	default:
 		return ErrUnknownCommand
 	}
@@ -61,6 +67,8 @@ func UnmarshalCommand(cmdID byte, data []byte) (protocol.ResponseCommand, error)
 
 	var factory CommandFactory
 	switch cmdID {
+	case 1:
+		factory = new(CommandSwitchAccountFactory)
 	default:
 		return nil, ErrUnknownCommand
 	}
@@ -71,3 +79,67 @@ type CommandFactory interface {
 	Marshal(command interface{}, writer io.Writer) error
 	Unmarshal(data []byte) (interface{}, error)
 }
+
+type CommandSwitchAccountFactory struct{}
+
+func (f *CommandSwitchAccountFactory) Marshal(command interface{}, writer io.Writer) error {
+	cmd, ok := command.(*protocol.CommandSwitchAccount)
+	if !ok {
+		return ErrCommandTypeMismatch
+	}
+
+	hostStr := ""
+	if cmd.Host != nil {
+		hostStr = cmd.Host.String()
+	}
+	common.Must2(writer.Write([]byte{byte(len(hostStr))}))
+
+	if len(hostStr) > 0 {
+		common.Must2(writer.Write([]byte(hostStr)))
+	}
+
+	common.Must2(serial.WriteUint16(writer, cmd.Port.Value()))
+
+	idBytes := cmd.ID.Bytes()
+	common.Must2(writer.Write(idBytes))
+	common.Must2(serial.WriteUint16(writer, 0)) // compatible with legacy alterId
+	common.Must2(writer.Write([]byte{byte(cmd.Level)}))
+
+	common.Must2(writer.Write([]byte{cmd.ValidMin}))
+	return nil
+}
+
+func (f *CommandSwitchAccountFactory) Unmarshal(data []byte) (interface{}, error) {
+	cmd := new(protocol.CommandSwitchAccount)
+	if len(data) == 0 {
+		return nil, ErrInsufficientLength
+	}
+	lenHost := int(data[0])
+	if len(data) < lenHost+1 {
+		return nil, ErrInsufficientLength
+	}
+	if lenHost > 0 {
+		cmd.Host = net.ParseAddress(string(data[1 : 1+lenHost]))
+	}
+	portStart := 1 + lenHost
+	if len(data) < portStart+2 {
+		return nil, ErrInsufficientLength
+	}
+	cmd.Port = net.PortFromBytes(data[portStart : portStart+2])
+	idStart := portStart + 2
+	if len(data) < idStart+16 {
+		return nil, ErrInsufficientLength
+	}
+	cmd.ID, _ = uuid.ParseBytes(data[idStart : idStart+16])
+	levelStart := idStart + 16 + 2
+	if len(data) < levelStart+1 {
+		return nil, ErrInsufficientLength
+	}
+	cmd.Level = uint32(data[levelStart])
+	timeStart := levelStart + 1
+	if len(data) < timeStart+1 {
+		return nil, ErrInsufficientLength
+	}
+	cmd.ValidMin = data[timeStart]
+	return cmd, nil
+}

proxy/vmess/encoding/commands_test.go

@@ -0,0 +1,55 @@
+package encoding_test
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/stretchr/testify/assert"
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/common/uuid"
+	. "github.com/xtls/xray-core/proxy/vmess/encoding"
+)
+
+func TestSwitchAccount(t *testing.T) {
+	sa := &protocol.CommandSwitchAccount{
+		Port:     1234,
+		ID:       uuid.New(),
+		Level:    128,
+		ValidMin: 16,
+	}
+
+	buffer := buf.New()
+	common.Must(MarshalCommand(sa, buffer))
+
+	cmd, err := UnmarshalCommand(1, buffer.BytesFrom(2))
+	common.Must(err)
+
+	sa2, ok := cmd.(*protocol.CommandSwitchAccount)
+	if !ok {
+		t.Fatal("failed to convert command to CommandSwitchAccount")
+	}
+	if r := cmp.Diff(sa2, sa); r != "" {
+		t.Error(r)
+	}
+}
+
+func TestSwitchAccountBugOffByOne(t *testing.T) {
+	sa := &protocol.CommandSwitchAccount{
+		Port:     1234,
+		ID:       uuid.New(),
+		Level:    128,
+		ValidMin: 16,
+	}
+
+	buffer := buf.New()
+	csaf := CommandSwitchAccountFactory{}
+	common.Must(csaf.Marshal(sa, buffer))
+
+	Payload := buffer.Bytes()
+
+	cmd, err := csaf.Unmarshal(Payload[:len(Payload)-1])
+	assert.Error(t, err)
+	assert.Nil(t, cmd)
+}

proxy/vmess/inbound/config.pb.go

@@ -118,6 +118,7 @@ type Config struct {
 
 	User    []*protocol.User `protobuf:"bytes,1,rep,name=user,proto3" json:"user,omitempty"`
 	Default *DefaultConfig   `protobuf:"bytes,2,opt,name=default,proto3" json:"default,omitempty"`
+	Detour  *DetourConfig    `protobuf:"bytes,3,opt,name=detour,proto3" json:"detour,omitempty"` // 4 is for legacy setting
 }
 
 func (x *Config) Reset() {
@@ -164,6 +165,13 @@ func (x *Config) GetDefault() *DefaultConfig {
 	return nil
 }
 
+func (x *Config) GetDetour() *DetourConfig {
+	if x != nil {
+		return x.Detour
+	}
+	return nil
+}
+
 var File_proxy_vmess_inbound_config_proto protoreflect.FileDescriptor
 
 var file_proxy_vmess_inbound_config_proto_rawDesc = []byte{
@@ -177,21 +185,26 @@ var file_proxy_vmess_inbound_config_proto_rawDesc = []byte{
 	0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x74, 0x6f, 0x22, 0x25, 0x0a, 0x0d, 0x44, 0x65, 0x66, 0x61,
 	0x75, 0x6c, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x14, 0x0a, 0x05, 0x6c, 0x65, 0x76,
 	0x65, 0x6c, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x05, 0x6c, 0x65, 0x76, 0x65, 0x6c, 0x22,
-	0x7b, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x2e, 0x0a, 0x04, 0x75, 0x73, 0x65,
+	0xbb, 0x01, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x2e, 0x0a, 0x04, 0x75, 0x73,
-	0x72, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63,
+	0x65, 0x72, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e,
-	0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x55,
+	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e,
-	0x73, 0x65, 0x72, 0x52, 0x04, 0x75, 0x73, 0x65, 0x72, 0x12, 0x41, 0x0a, 0x07, 0x64, 0x65, 0x66,
+	0x55, 0x73, 0x65, 0x72, 0x52, 0x04, 0x75, 0x73, 0x65, 0x72, 0x12, 0x41, 0x0a, 0x07, 0x64, 0x65,
-	0x61, 0x75, 0x6c, 0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x27, 0x2e, 0x78, 0x72, 0x61,
+	0x66, 0x61, 0x75, 0x6c, 0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x27, 0x2e, 0x78, 0x72,
-	0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76, 0x6d, 0x65, 0x73, 0x73, 0x2e, 0x69, 0x6e,
+	0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76, 0x6d, 0x65, 0x73, 0x73, 0x2e, 0x69,
-	0x62, 0x6f, 0x75, 0x6e, 0x64, 0x2e, 0x44, 0x65, 0x66, 0x61, 0x75, 0x6c, 0x74, 0x43, 0x6f, 0x6e,
+	0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x2e, 0x44, 0x65, 0x66, 0x61, 0x75, 0x6c, 0x74, 0x43, 0x6f,
-	0x66, 0x69, 0x67, 0x52, 0x07, 0x64, 0x65, 0x66, 0x61, 0x75, 0x6c, 0x74, 0x42, 0x6a, 0x0a, 0x1c,
+	0x6e, 0x66, 0x69, 0x67, 0x52, 0x07, 0x64, 0x65, 0x66, 0x61, 0x75, 0x6c, 0x74, 0x12, 0x3e, 0x0a,
-	0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76,
+	0x06, 0x64, 0x65, 0x74, 0x6f, 0x75, 0x72, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x26, 0x2e,
-	0x6d, 0x65, 0x73, 0x73, 0x2e, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x50, 0x01, 0x5a, 0x2d,
+	0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x76, 0x6d, 0x65, 0x73, 0x73,
-	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f,
+	0x2e, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x2e, 0x44, 0x65, 0x74, 0x6f, 0x75, 0x72, 0x43,
-	0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f,
+	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x52, 0x06, 0x64, 0x65, 0x74, 0x6f, 0x75, 0x72, 0x42, 0x6a, 0x0a,
-	0x76, 0x6d, 0x65, 0x73, 0x73, 0x2f, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0xaa, 0x02, 0x18,
+	0x1c, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e,
-	0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x56, 0x6d, 0x65, 0x73, 0x73,
+	0x76, 0x6d, 0x65, 0x73, 0x73, 0x2e, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x50, 0x01, 0x5a,
-	0x2e, 0x49, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x2d, 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, 0x76, 0x6d, 0x65, 0x73, 0x73, 0x2f, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0xaa, 0x02,
+	0x18, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x56, 0x6d, 0x65, 0x73,
+	0x73, 0x2e, 0x49, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
 }
 
 var (
@@ -216,11 +229,12 @@ var file_proxy_vmess_inbound_config_proto_goTypes = []any{
 var file_proxy_vmess_inbound_config_proto_depIdxs = []int32{
 	3, // 0: xray.proxy.vmess.inbound.Config.user:type_name -> xray.common.protocol.User
 	1, // 1: xray.proxy.vmess.inbound.Config.default:type_name -> xray.proxy.vmess.inbound.DefaultConfig
-	2, // [2:2] is the sub-list for method output_type
+	0, // 2: xray.proxy.vmess.inbound.Config.detour:type_name -> xray.proxy.vmess.inbound.DetourConfig
-	2, // [2:2] is the sub-list for method input_type
+	3, // [3:3] is the sub-list for method output_type
-	2, // [2:2] is the sub-list for extension type_name
+	3, // [3:3] is the sub-list for method input_type
-	2, // [2:2] is the sub-list for extension extendee
+	3, // [3:3] is the sub-list for extension type_name
-	0, // [0:2] is the sub-list for field type_name
+	3, // [3:3] is the sub-list for extension extendee
+	0, // [0:3] is the sub-list for field type_name
 }
 
 func init() { file_proxy_vmess_inbound_config_proto_init() }

proxy/vmess/inbound/config.proto

@@ -19,4 +19,6 @@ message DefaultConfig {
 message Config {
   repeated xray.common.protocol.User user = 1;
   DefaultConfig default = 2;
+  DetourConfig detour = 3;
+  // 4 is for legacy setting
 }

proxy/vmess/inbound/inbound.go

@@ -14,6 +14,8 @@ import (
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/signal"
+	"github.com/xtls/xray-core/common/task"
 	"github.com/xtls/xray-core/common/uuid"
 	"github.com/xtls/xray-core/core"
 	feature_inbound "github.com/xtls/xray-core/features/inbound"
@@ -21,7 +23,6 @@ import (
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/proxy/vmess"
 	"github.com/xtls/xray-core/proxy/vmess/encoding"
-	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
@@ -105,6 +106,7 @@ type Handler struct {
 	inboundHandlerManager feature_inbound.Manager
 	clients               *vmess.TimedUserValidator
 	usersByEmail          *userByEmail
+	detours               *DetourConfig
 	sessionHistory        *encoding.SessionHistory
 }
 
@@ -115,6 +117,7 @@ func New(ctx context.Context, config *Config) (*Handler, error) {
 		policyManager:         v.GetFeature(policy.ManagerType()).(policy.Manager),
 		inboundHandlerManager: v.GetFeature(feature_inbound.ManagerType()).(feature_inbound.Manager),
 		clients:               vmess.NewTimedUserValidator(),
+		detours:               config.Detour,
 		usersByEmail:          newUserByEmail(config.GetDefaultValue()),
 		sessionHistory:        encoding.NewSessionHistory(),
 	}
@@ -183,6 +186,44 @@ func (h *Handler) RemoveUser(ctx context.Context, email string) error {
 	return nil
 }
 
+func transferResponse(timer signal.ActivityUpdater, session *encoding.ServerSession, request *protocol.RequestHeader, response *protocol.ResponseHeader, input buf.Reader, output *buf.BufferedWriter) error {
+	session.EncodeResponseHeader(response, output)
+
+	bodyWriter, err := session.EncodeResponseBody(request, output)
+	if err != nil {
+		return errors.New("failed to start decoding response").Base(err)
+	}
+	{
+		// Optimize for small response packet
+		data, err := input.ReadMultiBuffer()
+		if err != nil {
+			return err
+		}
+
+		if err := bodyWriter.WriteMultiBuffer(data); err != nil {
+			return err
+		}
+	}
+
+	if err := output.SetBuffered(false); err != nil {
+		return err
+	}
+
+	if err := buf.Copy(input, bodyWriter, buf.UpdateActivity(timer)); err != nil {
+		return err
+	}
+
+	account := request.User.Account.(*vmess.MemoryAccount)
+
+	if request.Option.Has(protocol.RequestOptionChunkStream) && !account.NoTerminationSignal {
+		if err := bodyWriter.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // Process implements proxy.Inbound.Process().
 func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
 	sessionPolicy := h.policyManager.ForLevel(0)
@@ -236,33 +277,84 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 	inbound.CanSpliceCopy = 3
 	inbound.User = request.User
 
-	bodyReader, err := svrSession.DecodeRequestBody(request, reader)
+	sessionPolicy = h.policyManager.ForLevel(request.User.Level)
+
+	ctx, cancel := context.WithCancel(ctx)
+	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
+
+	ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
+	link, err := dispatcher.Dispatch(ctx, request.Destination())
 	if err != nil {
-		return errors.New("failed to start decoding").Base(err)
+		return errors.New("failed to dispatch request to ", request.Destination()).Base(err)
 	}
 
-	writer := buf.NewBufferedWriter(buf.NewWriter(connection))
+	requestDone := func() error {
-	response := &protocol.ResponseHeader{
+		defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
-		Command: h.generateCommand(ctx, request),
-	}
-	svrSession.EncodeResponseHeader(response, writer)
-	bodyWriter, err := svrSession.EncodeResponseBody(request, writer)
-	if err != nil {
-		return errors.New("failed to start decoding response").Base(err)
-	}
-	writer.SetFlushNext()
 
-	if err := dispatcher.DispatchLink(ctx, request.Destination(), &transport.Link{
+		bodyReader, err := svrSession.DecodeRequestBody(request, reader)
-		Reader: bodyReader,
+		if err != nil {
-		Writer: bodyWriter},
+			return errors.New("failed to start decoding").Base(err)
-	); err != nil {
+		}
-		return errors.New("failed to dispatch request").Base(err)
+		if err := buf.Copy(bodyReader, link.Writer, buf.UpdateActivity(timer)); err != nil {
+			return errors.New("failed to transfer request").Base(err)
+		}
+		return nil
 	}
+
+	responseDone := func() error {
+		defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
+
+		writer := buf.NewBufferedWriter(buf.NewWriter(connection))
+		defer writer.Flush()
+
+		response := &protocol.ResponseHeader{
+			Command: h.generateCommand(ctx, request),
+		}
+		return transferResponse(timer, svrSession, request, response, link.Reader, writer)
+	}
+
+	requestDonePost := task.OnSuccess(requestDone, task.Close(link.Writer))
+	if err := task.Run(ctx, requestDonePost, responseDone); err != nil {
+		common.Interrupt(link.Reader)
+		common.Interrupt(link.Writer)
+		return errors.New("connection ends").Base(err)
+	}
+
 	return nil
 }
 
-// Stub command generator
 func (h *Handler) generateCommand(ctx context.Context, request *protocol.RequestHeader) protocol.ResponseCommand {
+	if h.detours != nil {
+		tag := h.detours.To
+		if h.inboundHandlerManager != nil {
+			handler, err := h.inboundHandlerManager.GetHandler(ctx, tag)
+			if err != nil {
+				errors.LogWarningInner(ctx, err, "failed to get detour handler: ", tag)
+				return nil
+			}
+			proxyHandler, port, availableMin := handler.GetRandomInboundProxy()
+			inboundHandler, ok := proxyHandler.(*Handler)
+			if ok && inboundHandler != nil {
+				if availableMin > 255 {
+					availableMin = 255
+				}
+
+				errors.LogDebug(ctx, "pick detour handler for port ", port, " for ", availableMin, " minutes.")
+				user := inboundHandler.GetOrGenerateUser(request.User.Email)
+				if user == nil {
+					return nil
+				}
+				account := user.Account.(*vmess.MemoryAccount)
+				return &protocol.CommandSwitchAccount{
+					Port:     port,
+					ID:       account.ID.UUID(),
+					Level:    user.Level,
+					ValidMin: byte(availableMin),
+				}
+			}
+		}
+	}
+
 	return nil
 }
 

proxy/vmess/outbound/command.go

@@ -1,14 +1,41 @@
 package outbound
 
 import (
+	"time"
 
+	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
+	"github.com/xtls/xray-core/proxy/vmess"
 )
 
-// As a stub command consumer.
+func (h *Handler) handleSwitchAccount(cmd *protocol.CommandSwitchAccount) {
+	rawAccount := &vmess.Account{
+		Id: cmd.ID.String(),
+		SecuritySettings: &protocol.SecurityConfig{
+			Type: protocol.SecurityType_AUTO,
+		},
+	}
+
+	account, err := rawAccount.AsAccount()
+	common.Must(err)
+	user := &protocol.MemoryUser{
+		Email:   "",
+		Level:   cmd.Level,
+		Account: account,
+	}
+	dest := net.TCPDestination(cmd.Host, cmd.Port)
+	until := time.Now().Add(time.Duration(cmd.ValidMin) * time.Minute)
+	h.serverList.AddServer(protocol.NewServerSpec(dest, protocol.BeforeTime(until), user))
+}
+
 func (h *Handler) handleCommand(dest net.Destination, cmd protocol.ResponseCommand) {
-	switch cmd.(type) {
+	switch typedCommand := cmd.(type) {
+	case *protocol.CommandSwitchAccount:
+		if typedCommand.Host == nil {
+			typedCommand.Host = dest.Address
+		}
+		h.handleSwitchAccount(typedCommand)
 	default:
 	}
 }

proxy/vmess/outbound/config.pb.go

@@ -26,7 +26,7 @@ type Config struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Receiver *protocol.ServerEndpoint `protobuf:"bytes,1,opt,name=Receiver,proto3" json:"Receiver,omitempty"`
+	Receiver []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=Receiver,proto3" json:"Receiver,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -59,7 +59,7 @@ func (*Config) Descriptor() ([]byte, []int) {
 	return file_proxy_vmess_outbound_config_proto_rawDescGZIP(), []int{0}
 }
 
-func (x *Config) GetReceiver() *protocol.ServerEndpoint {
+func (x *Config) GetReceiver() []*protocol.ServerEndpoint {
 	if x != nil {
 		return x.Receiver
 	}
@@ -76,7 +76,7 @@ var file_proxy_vmess_outbound_config_proto_rawDesc = []byte{
 	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2f,
 	0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x2e, 0x70, 0x72, 0x6f, 0x74,
 	0x6f, 0x22, 0x4a, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x40, 0x0a, 0x08, 0x52,
-	0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x72, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x24, 0x2e,
+	0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x72, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x24, 0x2e,
 	0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74,
 	0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x45, 0x6e, 0x64, 0x70, 0x6f,
 	0x69, 0x6e, 0x74, 0x52, 0x08, 0x52, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x72, 0x42, 0x6d, 0x0a,

proxy/vmess/outbound/config.proto

@@ -9,5 +9,5 @@ option java_multiple_files = true;
 import "common/protocol/server_spec.proto";
 
 message Config {
-  xray.common.protocol.ServerEndpoint Receiver = 1;
+  repeated xray.common.protocol.ServerEndpoint Receiver = 1;
 }

proxy/vmess/outbound/outbound.go

@@ -29,24 +29,27 @@ import (
 
 // Handler is an outbound connection handler for VMess protocol.
 type Handler struct {
-	server        *protocol.ServerSpec
+	serverList    *protocol.ServerList
+	serverPicker  protocol.ServerPicker
 	policyManager policy.Manager
 	cone          bool
 }
 
 // New creates a new VMess outbound handler.
 func New(ctx context.Context, config *Config) (*Handler, error) {
-	if config.Receiver == nil {
+	serverList := protocol.NewServerList()
-		return nil, errors.New(`no vnext found`)
+	for _, rec := range config.Receiver {
-	}
+		s, err := protocol.NewServerSpecFromPB(rec)
-	server, err := protocol.NewServerSpecFromPB(config.Receiver)
+		if err != nil {
-	if err != nil {
+			return nil, errors.New("failed to parse server spec").Base(err)
-		return nil, errors.New("failed to get server spec").Base(err)
+		}
+		serverList.AddServer(s)
 	}
 
 	v := core.MustFromContext(ctx)
 	handler := &Handler{
-		server:        server,
+		serverList:    serverList,
+		serverPicker:  protocol.NewRoundRobinServerPicker(serverList),
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
 		cone:          ctx.Value("cone").(bool),
 	}
@@ -64,11 +67,11 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	ob.Name = "vmess"
 	ob.CanSpliceCopy = 3
 
-	rec := h.server
+	var rec *protocol.ServerSpec
 	var conn stat.Connection
-
 	err := retry.ExponentialBackoff(5, 200).On(func() error {
-		rawConn, err := dialer.Dial(ctx, rec.Destination)
+		rec = h.serverPicker.PickServer()
+		rawConn, err := dialer.Dial(ctx, rec.Destination())
 		if err != nil {
 			return err
 		}
@@ -82,7 +85,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	defer conn.Close()
 
 	target := ob.Target
-	errors.LogInfo(ctx, "tunneling request to ", target, " via ", rec.Destination.NetAddr())
+	errors.LogInfo(ctx, "tunneling request to ", target, " via ", rec.Destination().NetAddr())
 
 	command := protocol.RequestCommandTCP
 	if target.Network == net.Network_UDP {
@@ -92,7 +95,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		command = protocol.RequestCommandMux
 	}
 
-	user := rec.User
+	user := rec.PickUser()
 	request := &protocol.RequestHeader{
 		Version: encoding.Version,
 		User:    user,
@@ -199,7 +202,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		if err != nil {
 			return errors.New("failed to read header").Base(err)
 		}
-		h.handleCommand(rec.Destination, header.Command)
+		h.handleCommand(rec.Destination(), header.Command)
 
 		bodyReader, err := session.DecodeResponseBody(request, reader)
 		if err != nil {

testing/scenarios/command_test.go

@@ -423,16 +423,20 @@ func TestCommanderAddRemoveUser(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: u2.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: u2.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -596,16 +600,20 @@ func TestCommanderStats(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),

testing/scenarios/dokodemo_test.go

@@ -94,13 +94,17 @@ func TestDokodemoTCP(t *testing.T) {
 			Outbound: []*core.OutboundHandlerConfig{
 				{
 					ProxySettings: serial.ToTypedMessage(&outbound.Config{
-						Receiver: &protocol.ServerEndpoint{
+						Receiver: []*protocol.ServerEndpoint{
-							Address: net.NewIPOrDomain(net.LocalHostIP),
+							{
-							Port:    uint32(serverPort),
+								Address: net.NewIPOrDomain(net.LocalHostIP),
-							User:    &protocol.User{
+								Port:    uint32(serverPort),
-								Account: serial.ToTypedMessage(&vmess.Account{
+								User: []*protocol.User{
-									Id: userID.String(),
+									{
-								}),
+										Account: serial.ToTypedMessage(&vmess.Account{
+											Id: userID.String(),
+										}),
+									},
+								},
 							},
 						},
 					}),
@@ -186,13 +190,17 @@ func TestDokodemoUDP(t *testing.T) {
 			Outbound: []*core.OutboundHandlerConfig{
 				{
 					ProxySettings: serial.ToTypedMessage(&outbound.Config{
-						Receiver: &protocol.ServerEndpoint{
+						Receiver: []*protocol.ServerEndpoint{
-							Address: net.NewIPOrDomain(net.LocalHostIP),
+							{
-							Port:    uint32(serverPort),
+								Address: net.NewIPOrDomain(net.LocalHostIP),
-							User:    &protocol.User{
+								Port:    uint32(serverPort),
-								Account: serial.ToTypedMessage(&vmess.Account{
+								User: []*protocol.User{
-									Id: userID.String(),
+									{
-								}),
+										Account: serial.ToTypedMessage(&vmess.Account{
+											Id: userID.String(),
+										}),
+									},
+								},
 							},
 						},
 					}),

testing/scenarios/feature_test.go

@@ -170,13 +170,17 @@ func TestProxy(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: serverUserID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: serverUserID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -189,13 +193,17 @@ func TestProxy(t *testing.T) {
 			{
 				Tag: "proxy",
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(proxyPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(proxyPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: proxyUserID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: proxyUserID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -300,13 +308,17 @@ func TestProxyOverKCP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: serverUserID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: serverUserID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -322,13 +334,17 @@ func TestProxyOverKCP(t *testing.T) {
 			{
 				Tag: "proxy",
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(proxyPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(proxyPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: proxyUserID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: proxyUserID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -669,16 +685,20 @@ func TestDialXray(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User: &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),

testing/scenarios/policy_test.go

@@ -119,16 +119,20 @@ func TestVMessClosing(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -219,16 +223,20 @@ func TestZeroBuffer(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),

testing/scenarios/reverse_test.go

@@ -155,16 +155,20 @@ func TestReverseProxy(t *testing.T) {
 			{
 				Tag: "reverse",
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(reversePort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(reversePort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -344,16 +348,20 @@ func TestReverseProxyLongRunning(t *testing.T) {
 			{
 				Tag: "reverse",
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(reversePort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(reversePort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),

testing/scenarios/shadowsocks_test.go

@@ -75,11 +75,15 @@ func TestShadowsocksChaCha20Poly1305TCP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&shadowsocks.ClientConfig{
-					Server:    &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: account,
+							User: []*protocol.User{
+								{
+									Account: account,
+								},
+							},
 						},
 					},
 				}),
@@ -167,11 +171,15 @@ func TestShadowsocksAES256GCMTCP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&shadowsocks.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: account,
+							User: []*protocol.User{
+								{
+									Account: account,
+								},
+							},
 						},
 					},
 				}),
@@ -260,11 +268,15 @@ func TestShadowsocksAES128GCMUDP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&shadowsocks.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: account,
+							User: []*protocol.User{
+								{
+									Account: account,
+								},
+							},
 						},
 					},
 				}),
@@ -358,11 +370,15 @@ func TestShadowsocksAES128GCMUDPMux(t *testing.T) {
 					},
 				}),
 				ProxySettings: serial.ToTypedMessage(&shadowsocks.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: account,
+							User: []*protocol.User{
+								{
+									Account: account,
+								},
+							},
 						},
 					},
 				}),
@@ -439,11 +455,15 @@ func TestShadowsocksNone(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&shadowsocks.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: account,
+							User: []*protocol.User{
+								{
+									Account: account,
+								},
+							},
 						},
 					},
 				}),

testing/scenarios/socks_test.go

@@ -73,14 +73,18 @@ func TestSocksBridgeTCP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&socks.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&socks.Account{
+							User: []*protocol.User{
-								Username: "Test Account",
+								{
-								Password: "Test Password",
+									Account: serial.ToTypedMessage(&socks.Account{
-							}),
+										Username: "Test Account",
+										Password: "Test Password",
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -148,14 +152,18 @@ func TestSocksWithHttpRequest(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&http.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&http.Account{
+							User: []*protocol.User{
-								Username: "Test Account",
+								{
-								Password: "Test Password",
+									Account: serial.ToTypedMessage(&http.Account{
-							}),
+										Username: "Test Account",
+										Password: "Test Password",
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -248,14 +256,18 @@ func TestSocksBridageUDP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&socks.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&socks.Account{
+							User: []*protocol.User{
-								Username: "Test Account",
+								{
-								Password: "Test Password",
+									Account: serial.ToTypedMessage(&socks.Account{
-							}),
+										Username: "Test Account",
+										Password: "Test Password",
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -363,9 +375,11 @@ func TestSocksBridageUDPWithRouting(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&socks.ClientConfig{
-					Server: &protocol.ServerEndpoint{
+					Server: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
+							Port:    uint32(serverPort),
+						},
 					},
 				}),
 			},

testing/scenarios/tls_test.go

@@ -89,13 +89,17 @@ func TestSimpleTLSConnection(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -200,13 +204,17 @@ func TestAutoIssuingCertificate(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -301,13 +309,17 @@ func TestTLSOverKCP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -397,13 +409,17 @@ func TestTLSOverWebSocket(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -509,13 +525,17 @@ func TestGRPC(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -621,13 +641,17 @@ func TestGRPCMultiMode(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -728,13 +752,17 @@ func TestSimpleTLSConnectionPinned(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -826,13 +854,17 @@ func TestSimpleTLSConnectionPinnedWrongCert(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -923,13 +955,17 @@ func TestUTLSConnectionPinned(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -1022,13 +1058,17 @@ func TestUTLSConnectionPinnedWrongCert(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),

testing/scenarios/transport_test.go

@@ -85,13 +85,17 @@ func TestHTTPConnectionHeader(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),

testing/scenarios/vless_test.go

@@ -94,13 +94,17 @@ func TestVless(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Vnext: &protocol.ServerEndpoint{
+					Vnext: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vless.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vless.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -121,212 +125,6 @@ func TestVless(t *testing.T) {
 	}
 }
 
-func TestVlessMuxTcp(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{
-					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(serverPort)}},
-					Listen:   net.NewIPOrDomain(net.LocalHostIP),
-				}),
-				ProxySettings: serial.ToTypedMessage(&inbound.Config{
-					Clients: []*protocol.User{
-						{
-							Account: serial.ToTypedMessage(&vless.Account{
-								Id: userID.String(),
-							}),
-						},
-					},
-				}),
-			},
-		},
-		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{
-					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(clientPort)}},
-					Listen:   net.NewIPOrDomain(net.LocalHostIP),
-				}),
-				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
-					Address:  net.NewIPOrDomain(dest.Address),
-					Port:     uint32(dest.Port),
-					Networks: []net.Network{net.Network_TCP},
-				}),
-			},
-		},
-		Outbound: []*core.OutboundHandlerConfig{
-			{
-				SenderSettings: serial.ToTypedMessage(&proxyman.SenderConfig{
-					MultiplexSettings: &proxyman.MultiplexingConfig{
-						Enabled:     true,
-						Concurrency: 4,
-					},
-				}),
-				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Vnext: &protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
-						Port:    uint32(serverPort),
-						User:    &protocol.User{
-							Account: serial.ToTypedMessage(&vless.Account{
-								Id: userID.String(),
-							}),
-						},
-					},
-				}),
-			},
-		},
-	}
-
-	servers, err := InitializeServerConfigs(serverConfig, clientConfig)
-	common.Must(err)
-	defer CloseAllServers(servers)
-
-	for range "abcd" {
-		var errg errgroup.Group
-		for range 3 {
-			errg.Go(testTCPConn(clientPort, 10240, time.Second*20))
-		}
-		if err := errg.Wait(); err != nil {
-			t.Fatal(err)
-		}
-		time.Sleep(time.Second)
-	}
-}
-
-func TestVlessEncMuxTcp(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{
-					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(serverPort)}},
-					Listen:   net.NewIPOrDomain(net.LocalHostIP),
-				}),
-				ProxySettings: serial.ToTypedMessage(&inbound.Config{
-					Clients: []*protocol.User{
-						{
-							Account: serial.ToTypedMessage(&vless.Account{
-								Id: userID.String(),
-							}),
-						},
-					},
-					SecondsFrom: 600, //mlkem768x25519plus.native.600s.
-					Decryption: "Gzh5Aa3Ibo3343XFC7V2a8ucOpFeGjOL6jMlBZAfjqyty2rdRms8xccBAm68imYw2q96gg2dcueeL2r7n_2YzQ",
-				}),
-			},
-		},
-		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{
-					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(clientPort)}},
-					Listen:   net.NewIPOrDomain(net.LocalHostIP),
-				}),
-				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
-					Address:  net.NewIPOrDomain(dest.Address),
-					Port:     uint32(dest.Port),
-					Networks: []net.Network{net.Network_TCP},
-				}),
-			},
-		},
-		Outbound: []*core.OutboundHandlerConfig{
-			{
-				SenderSettings: serial.ToTypedMessage(&proxyman.SenderConfig{
-					MultiplexSettings: &proxyman.MultiplexingConfig{
-						Enabled:     true,
-						Concurrency: 4,
-					},
-				}),
-				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Vnext: &protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
-						Port:    uint32(serverPort),
-						User:    &protocol.User{
-							Account: serial.ToTypedMessage(&vless.Account{
-								Id: userID.String(),
-								Seconds: 1, //mlkem768x25519plus.native.0rtt.
-								Encryption: "ExaMB4tIHpFikMeZwAJ8_8hxpZNi3gY13Ft455yC04xiCWgWUwMvKUwDQVm8zLcE8EKnjVlhRDmkTzMzvTMZyYlswCuqx0YK9kVNNFcrQJWD8JpAmTN8fffApIoWitDEAUTEp9S_Ehxo-9a2evRyKqJcQ6WmPiiyGbZrnNAfLKhdRsA15rZt6eKMVQExtDpucfaFc2E4-GtKzKd7P0I6bXccC1q4gqyZcXiEfOmmWBTPMTkNPEUdnQVsPiSWgJxslQZ5pYlPE7GQE7qoxYBItDMhkHZ4l0YwsvgZ1EQ2yTEn9DOxbyMihLk4kSAtg1IrW7tCTNkhyVsUY3SeyReB2sfN2AU-TXmVGUJMTKJ1jfywu8JIb9lG14HB1Rku6nVNcIMTzyshvsi_8AQFCSOcDdQ7ZpBxKxW7N1tKXBI0shq7vWdufjpYCjAVh-k_QgonVOwadYt-wPMxDntbWzEf_yC9eFQ6cBGd5smWNeSQZwAvqXw_WVPD56EVlaQ5HpsOkqBdy1Enr1NnH7WdgNsfk6RSQhRgW1dF9XBUKylpqsvOXkq3I0fLuuJFfuEZu4MeNvdgI2mbM_UxK8AzlRwkm7Eb1WQfm-S05HJefdZzu8kHYamggwtNQum_NtODzRgw3uWbjYbEBIY0j9IMhyGynOYQHHmrR2kT-dh08GwVD7BfsJRvFYgy2ZI8a3xGgHyi6MKKE8g7krEd-ne_4ddSaysgctaiiLwI4NVRbYJIT8XEbmKTIwoZx4R7m7AffYJo2NlfEPREg8stBcY5dAGXeSwD0pxs-jCJOeifQYq7Elq216SrwCmayLg3XJcpxutOmkhai6hRO6eBP6uy9XlLXyMt3TW6isx_rRt1hXCezkl_8hPEcqI9tPE0ZYVQ-eMh2_e35gQyPUw02aequ4ojaHV03QaSMquqF8RXG7k1gDed9vqex3aFaSN6UUNkebLKrqAiPmq0fccQ3qdbAxLGZ0ZFF5mIwEiFoTM6V4yPgntkRYtxcCKK-5YkPfsIunrM3EsWDCovp_Ahdfs-aqQLqzk1wVKTLQaQI5ApBlmGB3EauNdHFJBoeGZOF9e7QbGujhGRGMpS1fFtI2SqlcXINZU7YvR2JMfBrvBYZ9whXawM_Rg31IJR1raMGAEm6hNpa7SBD0cprIZxG6HKUQFMGHVlVohjwpWE5AGIc5Rc8Va2x8e3zFTMTUIwCdMz1XlNaqBMldJx01JQLwgSsnfGGlEJ_jYujvYNo0EBk4yev1Ap6nO-zSU-WtimlhEP0-cb22Q6e4wCEnWfO-lABJsrhwhrbloM51k5QVIefNyIvDWBszpRsreidUZVU4TOH2EoltYslWdPkcckfCplFLyvGKBItoAPRTOKRCjOsqlmj9OvpbDCzedZUmjLNfoLSwsPC7Nk2FpIkVUG6WxCE2YiU9LFrZIgWRKwUluM_at9w7wowRkujXEAQiJKtuUWQCxGyVbJtufLmQI6_yafmwgLoSlyE0cL-_Rf4nBCBjJnmyBDRvAoA-W08vw53uMt3RnFVwKFqo3PonmYAETv5rrMjh3L3K16QS-2EgL_R7WAFd0",
-							}),
-						},
-					},
-				}),
-			},
-		},
-	}
-
-	servers, err := InitializeServerConfigs(serverConfig, clientConfig)
-	common.Must(err)
-	defer CloseAllServers(servers)
-
-	for range "abcd" {
-		var errg errgroup.Group
-		for range 3 {
-			errg.Go(testTCPConn(clientPort, 10240, time.Second*20))
-		}
-		if err := errg.Wait(); err != nil {
-			t.Fatal(err)
-		}
-		time.Sleep(time.Second)
-	}
-}
-
 func TestVlessTls(t *testing.T) {
 	tcpServer := tcp.Server{
 		MsgProcessor: xor,
@@ -401,13 +199,17 @@ func TestVlessTls(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Vnext: &protocol.ServerEndpoint{
+					Vnext: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vless.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-							}),
+									Account: serial.ToTypedMessage(&vless.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -520,14 +322,18 @@ func TestVlessXtlsVision(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Vnext: &protocol.ServerEndpoint{
+					Vnext: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vless.Account{
+							User: []*protocol.User{
-								Id:   userID.String(),
+								{
-								Flow: vless.XRV,
+									Account: serial.ToTypedMessage(&vless.Account{
-							}),
+										Id:   userID.String(),
+										Flow: vless.XRV,
+									}),
+								},
+							},
 						},
 					},
 				}),
@@ -650,14 +456,18 @@ func TestVlessXtlsVisionReality(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Vnext: &protocol.ServerEndpoint{
+					Vnext: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vless.Account{
+							User: []*protocol.User{
-								Id:   userID.String(),
+								{
-								Flow: vless.XRV,
+									Account: serial.ToTypedMessage(&vless.Account{
-							}),
+										Id:   userID.String(),
+										Flow: vless.XRV,
+									}),
+								},
+							},
 						},
 					},
 				}),

testing/scenarios/vmess_test.go

@@ -26,6 +26,147 @@ import (
 	"golang.org/x/sync/errgroup"
 )
 
+func TestVMessDynamicPort(t *testing.T) {
+	tcpServer := tcp.Server{
+		MsgProcessor: xor,
+	}
+	dest, err := tcpServer.Start()
+	common.Must(err)
+	defer tcpServer.Close()
+
+	userID := protocol.NewID(uuid.New())
+
+	retry := 1
+	serverPort := tcp.PickPort()
+	for {
+		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{
+						PortList: &net.PortList{Range: []*net.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(),
+								}),
+							},
+						},
+						Detour: &inbound.DetourConfig{
+							To: "detour",
+						},
+					}),
+				},
+				{
+					ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+						PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(serverPort + 100)}},
+						Listen:   net.NewIPOrDomain(net.LocalHostIP),
+					}),
+					ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
+						Address:  net.NewIPOrDomain(dest.Address),
+						Port:     uint32(dest.Port),
+						Networks: []net.Network{net.Network_TCP},
+					}),
+				},
+				{
+					ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+						PortList: &net.PortList{
+							Range: []*net.PortRange{{From: uint32(serverPort + 1), To: uint32(serverPort + 99)}},
+						},
+
+						Listen: net.NewIPOrDomain(net.LocalHostIP),
+						AllocationStrategy: &proxyman.AllocationStrategy{
+							Type: proxyman.AllocationStrategy_Random,
+							Concurrency: &proxyman.AllocationStrategy_AllocationStrategyConcurrency{
+								Value: 2,
+							},
+							Refresh: &proxyman.AllocationStrategy_AllocationStrategyRefresh{
+								Value: 5,
+							},
+						},
+					}),
+					ProxySettings: serial.ToTypedMessage(&inbound.Config{}),
+					Tag:           "detour",
+				},
+			},
+			Outbound: []*core.OutboundHandlerConfig{
+				{
+					ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
+				},
+			},
+		}
+
+		server, _ := InitializeServerConfig(serverConfig)
+		if server != nil && WaitConnAvailableWithTest(t, testTCPConn(serverPort+100, 1024, time.Second*2)) {
+			defer CloseServer(server)
+			break
+		}
+		retry += 1
+		if retry > 5 {
+			t.Fatal("All attempts failed to start server")
+		}
+		serverPort = tcp.PickPort()
+	}
+
+	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{
+					PortList: &net.PortList{Range: []*net.PortRange{net.SinglePortRange(clientPort)}},
+					Listen:   net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
+					Address:  net.NewIPOrDomain(dest.Address),
+					Port:     uint32(dest.Port),
+					Networks: []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(),
+									}),
+								},
+							},
+						},
+					},
+				}),
+			},
+		},
+	}
+
+	server, err := InitializeServerConfig(clientConfig)
+	common.Must(err)
+	defer CloseServer(server)
+
+	if !WaitConnAvailableWithTest(t, testTCPConn(clientPort, 1024, time.Second*2)) {
+		t.Fail()
+	}
+}
+
 func TestVMessGCM(t *testing.T) {
 	tcpServer := tcp.Server{
 		MsgProcessor: xor,
@@ -91,16 +232,20 @@ func TestVMessGCM(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id:               userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -189,16 +334,20 @@ func TestVMessGCMReadv(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id:               userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -290,16 +439,20 @@ func TestVMessGCMUDP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id:               userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -385,16 +538,20 @@ func TestVMessChacha20(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id:               userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_CHACHA20_POLY1305,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_CHACHA20_POLY1305,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -481,16 +638,20 @@ func TestVMessNone(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_NONE,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_NONE,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -579,16 +740,20 @@ func TestVMessKCP(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User: &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -701,16 +866,20 @@ func TestVMessKCPLarge(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -830,16 +999,20 @@ func TestVMessGCMMux(t *testing.T) {
 					},
 				}),
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -953,16 +1126,20 @@ func TestVMessGCMMuxUDP(t *testing.T) {
 					},
 				}),
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -1056,16 +1233,20 @@ func TestVMessZero(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_ZERO,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_ZERO,
+										},
+									}),
 								},
-							}),
+							},
 						},
 					},
 				}),
@@ -1151,17 +1332,21 @@ func TestVMessGCMLengthAuth(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+										TestsEnabled: "AuthenticatedLength",
+									}),
 								},
-								TestsEnabled: "AuthenticatedLength",
+							},
-							}),
 						},
 					},
 				}),
@@ -1213,7 +1398,7 @@ func TestVMessGCMLengthAuthPlusNoTerminationSignal(t *testing.T) {
 						{
 							Account: serial.ToTypedMessage(&vmess.Account{
 								Id:           userID.String(),
-								TestsEnabled: "AuthenticatedLength|",
+								TestsEnabled: "AuthenticatedLength|NoTerminationSignal",
 							}),
 						},
 					},
@@ -1251,17 +1436,21 @@ func TestVMessGCMLengthAuthPlusNoTerminationSignal(t *testing.T) {
 		Outbound: []*core.OutboundHandlerConfig{
 			{
 				ProxySettings: serial.ToTypedMessage(&outbound.Config{
-					Receiver: &protocol.ServerEndpoint{
+					Receiver: []*protocol.ServerEndpoint{
-						Address: net.NewIPOrDomain(net.LocalHostIP),
+						{
-						Port:    uint32(serverPort),
+							Address: net.NewIPOrDomain(net.LocalHostIP),
-						User:    &protocol.User{
+							Port:    uint32(serverPort),
-							Account: serial.ToTypedMessage(&vmess.Account{
+							User: []*protocol.User{
-								Id: userID.String(),
+								{
-								SecuritySettings: &protocol.SecurityConfig{
+									Account: serial.ToTypedMessage(&vmess.Account{
-									Type: protocol.SecurityType_AES128_GCM,
+										Id: userID.String(),
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_AES128_GCM,
+										},
+										TestsEnabled: "AuthenticatedLength|NoTerminationSignal",
+									}),
 								},
-								TestsEnabled: "AuthenticatedLength|NoTerminationSignal",
+							},
-							}),
 						},
 					},
 				}),