Merge pull request #253 from rprx/master

VLESS PREVIEW 2.2

infra/conf/vless.go

@@ -35,7 +35,7 @@ func (c *VLessInboundConfig) Build() (proto.Message, error) {
 	config := new(inbound.Config)
 
 	if len(c.Clients) == 0 {
-		return nil, newError(`VLESS settings: "clients" is empty`)
+		//return nil, newError(`VLESS settings: "clients" is empty`)
 	}
 	config.Clients = make([]*protocol.User, len(c.Clients))
 	for idx, rawUser := range c.Clients {

proxy/vless/encoding/encoding.go

@@ -60,49 +60,53 @@ func EncodeRequestHeader(writer io.Writer, request *protocol.RequestHeader, requ
 }
 
 // DecodeRequestHeader decodes and returns (if successful) a RequestHeader from an input stream.
-func DecodeRequestHeader(reader io.Reader, validator *vless.Validator) (*protocol.RequestHeader, *Addons, error, *buf.Buffer) {
+func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validator *vless.Validator) (*protocol.RequestHeader, *Addons, error, bool) {
 
 	buffer := buf.StackNew()
 	defer buffer.Release()
 
-	pre := buf.New()
+	request := new(protocol.RequestHeader)
 
-	if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
-		pre.Write(buffer.Bytes())
-		return nil, nil, newError("failed to read request version").Base(err), pre
-	}
-
-	request := &protocol.RequestHeader{
-		Version: buffer.Byte(0),
+	if isfb {
+		request.Version = first.Byte(0)
+	} else {
+		if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
+			return nil, nil, newError("failed to read request version").Base(err), false
+		}
+		request.Version = buffer.Byte(0)
 	}
 
-	pre.Write(buffer.Bytes())
-
 	switch request.Version {
 	case 0:
 
-		buffer.Clear()
-		if _, err := buffer.ReadFullFrom(reader, protocol.IDBytesLen); err != nil {
-			pre.Write(buffer.Bytes())
-			return nil, nil, newError("failed to read request user id").Base(err), pre
-		}
-
 		var id [16]byte
-		copy(id[:], buffer.Bytes())
+
+		if isfb {
+			copy(id[:], first.BytesRange(1, 17))
+		} else {
+			buffer.Clear()
+			if _, err := buffer.ReadFullFrom(reader, 16); err != nil {
+				return nil, nil, newError("failed to read request user id").Base(err), false
+			}
+			copy(id[:], buffer.Bytes())
+		}
 
 		if request.User = validator.Get(id); request.User == nil {
-			pre.Write(buffer.Bytes())
-			return nil, nil, newError("invalid request user id"), pre
+			return nil, nil, newError("invalid request user id"), isfb
+		}
+
+		if isfb {
+			first.Advance(17)
 		}
 
 		requestAddons, err := DecodeHeaderAddons(&buffer, reader)
 		if err != nil {
-			return nil, nil, newError("failed to decode request header addons").Base(err), nil
+			return nil, nil, newError("failed to decode request header addons").Base(err), false
 		}
 
 		buffer.Clear()
 		if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
-			return nil, nil, newError("failed to read request command").Base(err), nil
+			return nil, nil, newError("failed to read request command").Base(err), false
 		}
 
 		request.Command = protocol.RequestCommand(buffer.Byte(0))
@@ -118,14 +122,14 @@ func DecodeRequestHeader(reader io.Reader, validator *vless.Validator) (*protoco
 		}
 
 		if request.Address == nil {
-			return nil, nil, newError("invalid request address"), nil
+			return nil, nil, newError("invalid request address"), false
 		}
 
-		return request, requestAddons, nil, nil
+		return request, requestAddons, nil, false
 
 	default:
 
-		return nil, nil, newError("invalid request version"), pre
+		return nil, nil, newError("invalid request version"), isfb
 
 	}
 

proxy/vless/encoding/encoding_test.go

@@ -46,7 +46,7 @@ func TestRequestSerialization(t *testing.T) {
 	Validator := new(vless.Validator)
 	Validator.Add(user)
 
-	actualRequest, actualAddons, err, _ := DecodeRequestHeader(&buffer, Validator)
+	actualRequest, actualAddons, err, _ := DecodeRequestHeader(false, nil, &buffer, Validator)
 	common.Must(err)
 
 	if r := cmp.Diff(actualRequest, expectedRequest, cmp.AllowUnexported(protocol.ID{})); r != "" {
@@ -83,7 +83,7 @@ func TestInvalidRequest(t *testing.T) {
 	Validator := new(vless.Validator)
 	Validator.Add(user)
 
-	_, _, err, _ := DecodeRequestHeader(&buffer, Validator)
+	_, _, err, _ := DecodeRequestHeader(false, nil, &buffer, Validator)
 	if err == nil {
 		t.Error("nil error")
 	}
@@ -114,7 +114,7 @@ func TestMuxRequest(t *testing.T) {
 	Validator := new(vless.Validator)
 	Validator.Add(user)
 
-	actualRequest, actualAddons, err, _ := DecodeRequestHeader(&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

@@ -171,7 +171,6 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection i
 	var request *protocol.RequestHeader
 	var requestAddons *encoding.Addons
 	var err error
-	var pre *buf.Buffer
 
 	isfb := false
 	apfb := h.fallbacks
@@ -182,12 +181,7 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection i
 	if isfb && firstLen < 18 {
 		err = newError("fallback directly")
 	} else {
-		request, requestAddons, err, pre = encoding.DecodeRequestHeader(reader, h.validator)
-		if pre != nil {
-			defer pre.Release()
-		} else {
-			isfb = false
-		}
+		request, requestAddons, err, isfb = encoding.DecodeRequestHeader(isfb, first, reader, h.validator)
 	}
 
 	if err != nil {
@@ -233,13 +227,13 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection i
 						}
 					}
 				*/
-				if pre != nil && pre.Len() == 1 && first.Byte(3) != '*' { // firstLen >= 18 && invalid request version && not h2c
+				if firstLen >= 18 && first.Byte(4) != '*' { // not h2c
 					firstBytes := first.Bytes()
-					for i := 3; i <= 7; i++ { // 5 -> 9
+					for i := 4; i <= 8; i++ { // 5 -> 9
 						if firstBytes[i] == '/' && firstBytes[i-1] == ' ' {
 							search := len(firstBytes)
 							if search > 64 {
-								search = 64 // up to 60
+								search = 64 // up to about 60
 							}
 							for j := i + 1; j < search; j++ {
 								k := firstBytes[j]
@@ -331,11 +325,6 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection i
 						return newError("failed to set PROXY protocol v", fb.Xver).Base(err).AtWarning()
 					}
 				}
-				if pre != nil && pre.Len() > 0 {
-					if err := serverWriter.WriteMultiBuffer(buf.MultiBuffer{pre}); err != nil {
-						return newError("failed to fallback request pre").Base(err).AtWarning()
-					}
-				}
 				if err := buf.Copy(reader, serverWriter, buf.UpdateActivity(timer)); err != nil {
 					return newError("failed to fallback request payload").Base(err).AtInfo()
 				}

proxy/vless/outbound/outbound.go

@@ -133,7 +133,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 			return newError(vless.XRO + " doesn't support Mux").AtWarning()
 		case protocol.RequestCommandUDP:
 			if requestAddons.Flow == vless.XRO && request.Port == 443 {
-				return newError(vless.XRO + " stopped UDP/443").AtWarning()
+				return newError(vless.XRO + " stopped UDP/443").AtInfo()
 			}
 			requestAddons.Flow = ""
 		case protocol.RequestCommandTCP: