VLESS practice: Use user-sent VLESS UUID's last byte as `vlessRoute` for `routing` `rules`

https://github.com/XTLS/Xray-core/pull/5009#issuecomment-3194262087

app/router/command/command.pb.go

@@ -44,6 +44,7 @@ type RoutingContext struct {
 	OutboundTag       string            `protobuf:"bytes,12,opt,name=OutboundTag,proto3" json:"OutboundTag,omitempty"`
 	LocalIPs          [][]byte          `protobuf:"bytes,13,rep,name=LocalIPs,proto3" json:"LocalIPs,omitempty"`
 	LocalPort         uint32            `protobuf:"varint,14,opt,name=LocalPort,proto3" json:"LocalPort,omitempty"`
+	VlessRoute        uint32            `protobuf:"varint,15,opt,name=VlessRoute,proto3" json:"VlessRoute,omitempty"`
 }
 
 func (x *RoutingContext) Reset() {
@@ -174,6 +175,13 @@ func (x *RoutingContext) GetLocalPort() uint32 {
 	return 0
 }
 
+func (x *RoutingContext) GetVlessRoute() uint32 {
+	if x != nil {
+		return x.VlessRoute
+	}
+	return 0
+}
+
 // SubscribeRoutingStatsRequest subscribes to routing statistics channel if
 // opened by xray-core.
 // * FieldSelectors selects a subset of fields in routing statistics to return.
@@ -843,7 +851,7 @@ var file_app_router_command_command_proto_rawDesc = []byte{
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@@ -877,7 +885,9 @@ var file_app_router_command_command_proto_rawDesc = []byte{
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app/router/command/command.proto

@@ -27,6 +27,7 @@ message RoutingContext {
   string OutboundTag = 12;
   repeated bytes LocalIPs = 13;
   uint32 LocalPort = 14;
+  uint32 VlessRoute = 15;
 }
 
 // SubscribeRoutingStatsRequest subscribes to routing statistics channel if

app/router/command/config.go

@@ -36,6 +36,10 @@ func (c routingContext) GetLocalPort() net.Port {
 	return net.Port(c.RoutingContext.GetLocalPort())
 }
 
+func (c routingContext) GetVlessRoute() net.Port {
+	return net.Port(c.RoutingContext.GetVlessRoute())
+}
+
 func (c routingContext) GetRuleTag() string {
 	return ""
 }

app/router/condition.go

@@ -166,6 +166,8 @@ func (v *PortMatcher) Apply(ctx routing.Context) bool {
 		return v.port.Contains(ctx.GetSourcePort())
 	case "target":
 		return v.port.Contains(ctx.GetTargetPort())
+	case "vlessRoute":
+		return v.port.Contains(ctx.GetVlessRoute())
 	default:
 		panic("unreachable, asType should be local or source or target")
 	}

app/router/config.go

@@ -45,6 +45,10 @@ func (rr *RoutingRule) BuildCondition() (Condition, error) {
 		conds.Add(NewUserMatcher(rr.UserEmail))
 	}
 
+	if rr.VlessRouteList != nil {
+		conds.Add(NewPortMatcher(rr.VlessRouteList, "vlessRoute"))
+	}
+
 	if len(rr.InboundTag) > 0 {
 		conds.Add(NewInboundTagMatcher(rr.InboundTag))
 	}

app/router/config.pb.go

@@ -493,6 +493,7 @@ type RoutingRule struct {
 	Attributes     map[string]string `protobuf:"bytes,15,rep,name=attributes,proto3" json:"attributes,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 	LocalGeoip     []*GeoIP          `protobuf:"bytes,17,rep,name=local_geoip,json=localGeoip,proto3" json:"local_geoip,omitempty"`
 	LocalPortList  *net.PortList     `protobuf:"bytes,18,opt,name=local_port_list,json=localPortList,proto3" json:"local_port_list,omitempty"`
+	VlessRouteList *net.PortList     `protobuf:"bytes,20,opt,name=vless_route_list,json=vlessRouteList,proto3" json:"vless_route_list,omitempty"`
 }
 
 func (x *RoutingRule) Reset() {
@@ -637,6 +638,13 @@ func (x *RoutingRule) GetLocalPortList() *net.PortList {
 	return nil
 }
 
+func (x *RoutingRule) GetVlessRouteList() *net.PortList {
+	if x != nil {
+		return x.VlessRouteList
+	}
+	return nil
+}
+
 type isRoutingRule_TargetTag interface {
 	isRoutingRule_TargetTag()
 }
@@ -1077,7 +1085,7 @@ var file_app_router_config_proto_rawDesc = []byte{
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+	0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1235,16 +1248,17 @@ var file_app_router_config_proto_depIdxs = []int32{
 	14, // 12: xray.app.router.RoutingRule.attributes:type_name -> xray.app.router.RoutingRule.AttributesEntry
 	4,  // 13: xray.app.router.RoutingRule.local_geoip:type_name -> xray.app.router.GeoIP
 	15, // 14: xray.app.router.RoutingRule.local_port_list:type_name -> xray.common.net.PortList
-	17, // 15: xray.app.router.BalancingRule.strategy_settings:type_name -> xray.common.serial.TypedMessage
-	10, // 16: xray.app.router.StrategyLeastLoadConfig.costs:type_name -> xray.app.router.StrategyWeight
-	1,  // 17: xray.app.router.Config.domain_strategy:type_name -> xray.app.router.Config.DomainStrategy
-	8,  // 18: xray.app.router.Config.rule:type_name -> xray.app.router.RoutingRule
-	9,  // 19: xray.app.router.Config.balancing_rule:type_name -> xray.app.router.BalancingRule
-	20, // [20:20] is the sub-list for method output_type
-	20, // [20:20] is the sub-list for method input_type
-	20, // [20:20] is the sub-list for extension type_name
-	20, // [20:20] is the sub-list for extension extendee
-	0,  // [0:20] is the sub-list for field type_name
+	15, // 15: xray.app.router.RoutingRule.vless_route_list:type_name -> xray.common.net.PortList
+	17, // 16: xray.app.router.BalancingRule.strategy_settings:type_name -> xray.common.serial.TypedMessage
+	10, // 17: xray.app.router.StrategyLeastLoadConfig.costs:type_name -> xray.app.router.StrategyWeight
+	1,  // 18: xray.app.router.Config.domain_strategy:type_name -> xray.app.router.Config.DomainStrategy
+	8,  // 19: xray.app.router.Config.rule:type_name -> xray.app.router.RoutingRule
+	9,  // 20: xray.app.router.Config.balancing_rule:type_name -> xray.app.router.BalancingRule
+	21, // [21:21] is the sub-list for method output_type
+	21, // [21:21] is the sub-list for method input_type
+	21, // [21:21] is the sub-list for extension type_name
+	21, // [21:21] is the sub-list for extension extendee
+	0,  // [0:21] is the sub-list for field type_name
 }
 
 func init() { file_app_router_config_proto_init() }

app/router/config.proto

@@ -111,6 +111,8 @@ message RoutingRule {
 
   repeated GeoIP local_geoip = 17;
   xray.common.net.PortList local_port_list = 18;
+
+  xray.common.net.PortList vless_route_list = 20;
 }
 
 message BalancingRule {

common/session/session.go

@@ -46,6 +46,8 @@ type Inbound struct {
 	Name string
 	// User is the user that authenticates for the inbound. May be nil if the protocol allows anonymous traffic.
 	User *protocol.MemoryUser
+	// VlessRoute is the user-sent VLESS UUID's last byte.
+	VlessRoute net.Port
 	// Conn is actually internet.Connection. May be nil.
 	Conn net.Conn
 	// Timer of the inbound buf copier. May be nil.

features/routing/context.go

@@ -41,6 +41,9 @@ type Context interface {
 	// GetUser returns the user email from the connection content, if exists.
 	GetUser() string
 
+	// GetVlessRoute returns the user-sent VLESS UUID's last byte, if exists.
+	GetVlessRoute() net.Port
+
 	// GetAttributes returns extra attributes from the conneciont content.
 	GetAttributes() map[string]string
 

features/routing/session/context.go

@@ -128,6 +128,14 @@ func (ctx *Context) GetUser() string {
 	return ctx.Inbound.User.Email
 }
 
+// GetVlessRoute implements routing.Context.
+func (ctx *Context) GetVlessRoute() net.Port {
+	if ctx.Inbound == nil {
+		return 0
+	}
+	return ctx.Inbound.VlessRoute
+}
+
 // GetAttributes implements routing.Context.
 func (ctx *Context) GetAttributes() map[string]string {
 	if ctx.Content == nil {

infra/conf/router.go

@@ -531,6 +531,7 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		Source     *StringList       `json:"source"`
 		SourcePort *PortList         `json:"sourcePort"`
 		User       *StringList       `json:"user"`
+		VlessRoute *PortList         `json:"vlessRoute"`
 		InboundTag *StringList       `json:"inboundTag"`
 		Protocols  *StringList       `json:"protocol"`
 		Attributes map[string]string `json:"attrs"`
@@ -628,6 +629,10 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		}
 	}
 
+	if rawFieldRule.VlessRoute != nil {
+		rule.VlessRouteList = rawFieldRule.VlessRoute.Build()
+	}
+
 	if rawFieldRule.InboundTag != nil {
 		for _, s := range *rawFieldRule.InboundTag {
 			rule.InboundTag = append(rule.InboundTag, s)

proxy/vless/encoding/encoding.go

@@ -62,7 +62,7 @@ func EncodeRequestHeader(writer io.Writer, request *protocol.RequestHeader, requ
 }
 
 // DecodeRequestHeader decodes and returns (if successful) a RequestHeader from an input stream.
-func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validator vless.Validator) (*protocol.RequestHeader, *Addons, bool, error) {
+func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validator vless.Validator) (byte, *protocol.RequestHeader, *Addons, bool, error) {
 	buffer := buf.StackNew()
 	defer buffer.Release()
 
@@ -72,7 +72,7 @@ func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validat
 		request.Version = first.Byte(0)
 	} else {
 		if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
-			return nil, nil, false, errors.New("failed to read request version").Base(err)
+			return 0, nil, nil, false, errors.New("failed to read request version").Base(err)
 		}
 		request.Version = buffer.Byte(0)
 	}
@@ -87,13 +87,13 @@ func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validat
 		} else {
 			buffer.Clear()
 			if _, err := buffer.ReadFullFrom(reader, 16); err != nil {
-				return nil, nil, false, errors.New("failed to read request user id").Base(err)
+				return 0, nil, nil, false, errors.New("failed to read request user id").Base(err)
 			}
 			copy(id[:], buffer.Bytes())
 		}
 
 		if request.User = validator.Get(id); request.User == nil {
-			return nil, nil, isfb, errors.New("invalid request user id")
+			return 0, nil, nil, isfb, errors.New("invalid request user id")
 		}
 
 		if isfb {
@@ -102,12 +102,12 @@ func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validat
 
 		requestAddons, err := DecodeHeaderAddons(&buffer, reader)
 		if err != nil {
-			return nil, nil, false, errors.New("failed to decode request header addons").Base(err)
+			return 0, nil, nil, false, errors.New("failed to decode request header addons").Base(err)
 		}
 
 		buffer.Clear()
 		if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
-			return nil, nil, false, errors.New("failed to read request command").Base(err)
+			return 0, nil, nil, false, errors.New("failed to read request command").Base(err)
 		}
 
 		request.Command = protocol.RequestCommand(buffer.Byte(0))
@@ -122,11 +122,11 @@ func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validat
 			}
 		}
 		if request.Address == nil {
-			return nil, nil, false, errors.New("invalid request address")
+			return 0, nil, nil, false, errors.New("invalid request address")
 		}
-		return request, requestAddons, false, nil
+		return id[15], request, requestAddons, false, nil
 	default:
-		return nil, nil, isfb, errors.New("invalid request version")
+		return 0, nil, nil, isfb, errors.New("invalid request version")
 	}
 }
 

proxy/vless/encoding/encoding_test.go

@@ -45,7 +45,7 @@ func TestRequestSerialization(t *testing.T) {
 	Validator := new(vless.MemoryValidator)
 	Validator.Add(user)
 
-	actualRequest, actualAddons, _, err := DecodeRequestHeader(false, nil, &buffer, Validator)
+	_, actualRequest, actualAddons, _, err := DecodeRequestHeader(false, nil, &buffer, Validator)
 	common.Must(err)
 
 	if r := cmp.Diff(actualRequest, expectedRequest, cmp.AllowUnexported(protocol.ID{})); r != "" {
@@ -86,7 +86,7 @@ func TestInvalidRequest(t *testing.T) {
 	Validator := new(vless.MemoryValidator)
 	Validator.Add(user)
 
-	_, _, _, err := DecodeRequestHeader(false, nil, &buffer, Validator)
+	_, _, _, _, err := DecodeRequestHeader(false, nil, &buffer, Validator)
 	if err == nil {
 		t.Error("nil error")
 	}
@@ -117,7 +117,7 @@ func TestMuxRequest(t *testing.T) {
 	Validator := new(vless.MemoryValidator)
 	Validator.Add(user)
 
-	actualRequest, actualAddons, _, err := DecodeRequestHeader(false, nil, &buffer, Validator)
+	_, actualRequest, actualAddons, _, err := DecodeRequestHeader(false, nil, &buffer, Validator)
 	common.Must(err)
 
 	if r := cmp.Diff(actualRequest, expectedRequest, cmp.AllowUnexported(protocol.ID{})); r != "" {

proxy/vless/inbound/inbound.go

@@ -217,6 +217,7 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 		Buffer: buf.MultiBuffer{first},
 	}
 
+	var vlessRoute byte
 	var request *protocol.RequestHeader
 	var requestAddons *encoding.Addons
 	var err error
@@ -227,7 +228,7 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 	if isfb && firstLen < 18 {
 		err = errors.New("fallback directly")
 	} else {
-		request, requestAddons, isfb, err = encoding.DecodeRequestHeader(isfb, first, reader, h.validator)
+		vlessRoute, request, requestAddons, isfb, err = encoding.DecodeRequestHeader(isfb, first, reader, h.validator)
 	}
 
 	if err != nil {
@@ -455,6 +456,7 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 	}
 	inbound.Name = "vless"
 	inbound.User = request.User
+	inbound.VlessRoute = net.Port(vlessRoute)
 
 	account := request.User.Account.(*vless.MemoryAccount)
 

proxy/vless/validator.go

@@ -33,7 +33,7 @@ func (v *MemoryValidator) Add(u *protocol.MemoryUser) error {
 			return errors.New("User ", u.Email, " already exists.")
 		}
 	}
-	v.users.Store(u.Account.(*MemoryAccount).ID.UUID(), u)
+	v.users.Store([15]byte(u.Account.(*MemoryAccount).ID.Bytes()), u)
 	return nil
 }
 
@@ -48,13 +48,13 @@ func (v *MemoryValidator) Del(e string) error {
 		return errors.New("User ", e, " not found.")
 	}
 	v.email.Delete(le)
-	v.users.Delete(u.(*protocol.MemoryUser).Account.(*MemoryAccount).ID.UUID())
+	v.users.Delete([15]byte(u.(*protocol.MemoryUser).Account.(*MemoryAccount).ID.Bytes()))
 	return nil
 }
 
 // Get a VLESS user with UUID, nil if user doesn't exist.
 func (v *MemoryValidator) Get(id uuid.UUID) *protocol.MemoryUser {
-	u, _ := v.users.Load(id)
+	u, _ := v.users.Load([15]byte(id[:]))
 	if u != nil {
 		return u.(*protocol.MemoryUser)
 	}