Improve configuration detector (cone or symmetric)

app/proxyman/inbound/always.go

@@ -136,6 +136,7 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 					uplinkCounter:   uplinkCounter,
 					downlinkCounter: downlinkCounter,
 					stream:          mss,
+					ctx:             ctx,
 				}
 				h.workers = append(h.workers, worker)
 			}

app/proxyman/inbound/dynamic.go

@@ -156,6 +156,7 @@ func (h *DynamicInboundHandler) refresh() error {
 				uplinkCounter:   uplinkCounter,
 				downlinkCounter: downlinkCounter,
 				stream:          h.streamSettings,
+				ctx:             h.ctx,
 			}
 			if err := worker.Start(); err != nil {
 				newError("failed to create UDP worker").Base(err).AtWarning().WriteToLog()

app/proxyman/inbound/worker.go

@@ -239,6 +239,9 @@ type udpWorker struct {
 
 	checker    *task.Periodic
 	activeConn map[connID]*udpConn
+
+	ctx  context.Context
+	cone bool
 }
 
 func (w *udpWorker) getConnection(id connID) (*udpConn, bool) {
@@ -279,7 +282,7 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 		src: source,
 	}
 	if originalDest.IsValid() {
-		if !buf.Cone {
+		if !w.cone {
 			id.dest = originalDest
 		}
 		b.UDP = &originalDest
@@ -360,6 +363,8 @@ func (w *udpWorker) Start() error {
 		return err
 	}
 
+	w.cone = w.ctx.Value("cone").(bool)
+
 	w.checker = &task.Periodic{
 		Interval: time.Minute,
 		Execute:  w.clean,

common/buf/buffer.go

@@ -14,8 +14,6 @@ const (
 
 var pool = bytespool.GetPool(Size)
 
-var Cone = true
-
 // Buffer is a recyclable allocation of a byte array. Buffer.Release() recycles
 // the buffer into an internal buffer pool, in order to recreate a buffer more
 // quickly.

core/xray.go

@@ -3,8 +3,13 @@ package core
 import (
 	"context"
 	"reflect"
+	"runtime/debug"
+	"strings"
 	"sync"
 
+	"github.com/golang/protobuf/proto"
+
+	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/serial"
 	"github.com/xtls/xray-core/features"
@@ -179,6 +184,31 @@ func NewWithContext(ctx context.Context, config *Config) (*Instance, error) {
 }
 
 func initInstanceWithConfig(config *Config, server *Instance) (bool, error) {
+	cone := true
+	v, t := false, false
+	for _, outbound := range config.Outbound {
+		s := strings.ToLower(outbound.ProxySettings.Type)
+		l := len(s)
+		if l >= 16 && s[11:16] == "vless" || l >= 16 && s[11:16] == "vmess" {
+			v = true
+			continue
+		}
+		if l >= 17 && s[11:17] == "trojan" || l >= 22 && s[11:22] == "shadowsocks" {
+			t = true
+			var m proxyman.SenderConfig
+			proto.Unmarshal(outbound.SenderSettings.Value, &m)
+			if m.MultiplexSettings != nil && m.MultiplexSettings.Enabled {
+				cone = false
+				break
+			}
+		}
+	}
+	if v && !t {
+		cone = false
+	}
+	server.ctx = context.WithValue(server.ctx, "cone", cone)
+	defer debug.FreeOSMemory()
+
 	if config.Transport != nil {
 		features.PrintDeprecatedFeatureWarning("global transport settings")
 	}

main/run.go

@@ -14,10 +14,6 @@ import (
 	"strings"
 	"syscall"
 
-	"github.com/golang/protobuf/proto"
-
-	"github.com/xtls/xray-core/app/proxyman"
-	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/cmdarg"
 	"github.com/xtls/xray-core/common/platform"
 	"github.com/xtls/xray-core/core"
@@ -185,26 +181,6 @@ func startXray() (core.Server, error) {
 		return nil, newError("failed to load config files: [", configFiles.String(), "]").Base(err)
 	}
 
-	v, t := false, false
-	for _, outbound := range config.Outbound {
-		s := strings.ToLower(outbound.ProxySettings.Type)
-		l := len(s)
-		if l >= 16 && s[11:16] == "vless" || l >= 16 && s[11:16] == "vmess" {
-			v = true
-			continue
-		}
-		if l >= 17 && s[11:17] == "trojan" || l >= 22 && s[11:22] == "shadowsocks" {
-			var m proxyman.SenderConfig
-			proto.Unmarshal(outbound.SenderSettings.Value, &m)
-			if m.MultiplexSettings == nil || !m.MultiplexSettings.Enabled {
-				t = true
-			}
-		}
-	}
-	if v && !t {
-		buf.Cone = false
-	}
-
 	server, err := core.New(config)
 	if err != nil {
 		return nil, newError("failed to create server").Base(err)

proxy/shadowsocks/server.go

@@ -24,6 +24,7 @@ type Server struct {
 	config        *ServerConfig
 	user          *protocol.MemoryUser
 	policyManager policy.Manager
+	cone          bool
 }
 
 // NewServer create a new Shadowsocks server.
@@ -42,6 +43,7 @@ func NewServer(ctx context.Context, config *ServerConfig) (*Server, error) {
 		config:        config,
 		user:          mUser,
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
+		cone:          ctx.Value("cone").(bool),
 	}
 
 	return s, nil
@@ -144,7 +146,7 @@ func (s *Server) handlerUDPPayload(ctx context.Context, conn internet.Connection
 
 			data.UDP = &destination
 
-			if !buf.Cone || dest == nil {
+			if !s.cone || dest == nil {
 				dest = &destination
 			}
 

proxy/socks/server.go

@@ -26,6 +26,7 @@ import (
 type Server struct {
 	config        *ServerConfig
 	policyManager policy.Manager
+	cone          bool
 }
 
 // NewServer creates a new Server object.
@@ -34,6 +35,7 @@ func NewServer(ctx context.Context, config *ServerConfig) (*Server, error) {
 	s := &Server{
 		config:        config,
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
+		cone:          ctx.Value("cone").(bool),
 	}
 	return s, nil
 }
@@ -261,7 +263,7 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn internet.Connection,
 
 			payload.UDP = &destination
 
-			if !buf.Cone || dest == nil {
+			if !s.cone || dest == nil {
 				dest = &destination
 			}
 

proxy/trojan/server.go

@@ -47,6 +47,7 @@ type Server struct {
 	policyManager policy.Manager
 	validator     *Validator
 	fallbacks     map[string]map[string]*Fallback // or nil
+	cone          bool
 }
 
 // NewServer creates a new trojan inbound handler.
@@ -67,6 +68,7 @@ func NewServer(ctx context.Context, config *ServerConfig) (*Server, error) {
 	server := &Server{
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
 		validator:     validator,
+		cone:          ctx.Value("cone").(bool),
 	}
 
 	if config.Fallbacks != nil {
@@ -293,7 +295,7 @@ func (s *Server) handleUDPPayload(ctx context.Context, clientReader *PacketReade
 			}
 			newError("tunnelling request to ", destination).WriteToLog(session.ExportIDToError(ctx))
 
-			if !buf.Cone || dest == nil {
+			if !s.cone || dest == nil {
 				dest = &destination
 			}