settings for mux concurrency

.vscode/settings.json

@@ -10,8 +10,8 @@
 
   "protoc": {
     "options": [
-      "--proto_path=$GOPATH/src/",
-      "--proto_path=$GOPATH/src/github.com/google/protobuf/src"
+      "--proto_path=${env.GOPATH}/src/",
+      "--proto_path=${env.GOPATH}/src/github.com/google/protobuf/src"
     ]
   }
-}
+}

app/proxyman/config.pb.go

@@ -345,7 +345,8 @@ func (m *OutboundHandlerConfig) GetComment() string {
 }
 
 type MultiplexingConfig struct {
-	Enabled bool `protobuf:"varint,1,opt,name=enabled" json:"enabled,omitempty"`
+	Enabled     bool   `protobuf:"varint,1,opt,name=enabled" json:"enabled,omitempty"`
+	Concurrency uint32 `protobuf:"varint,2,opt,name=concurrency" json:"concurrency,omitempty"`
 }
 
 func (m *MultiplexingConfig) Reset()                    { *m = MultiplexingConfig{} }
@@ -360,6 +361,13 @@ func (m *MultiplexingConfig) GetEnabled() bool {
 	return false
 }
 
+func (m *MultiplexingConfig) GetConcurrency() uint32 {
+	if m != nil {
+		return m.Concurrency
+	}
+	return 0
+}
+
 type SessionFrame struct {
 	Id      uint32                           `protobuf:"varint,1,opt,name=id" json:"id,omitempty"`
 	Command SessionFrame_FrameCommand        `protobuf:"varint,2,opt,name=command,enum=v2ray.core.app.proxyman.SessionFrame_FrameCommand" json:"command,omitempty"`
@@ -419,61 +427,62 @@ func init() {
 func init() { proto.RegisterFile("v2ray.com/core/app/proxyman/config.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
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+	0x85, 0xab, 0xed, 0xe0, 0x09, 0x6c, 0x2d, 0x9f, 0x85, 0xda, 0x00, 0xe1, 0x22, 0x3f, 0xd2, 0xb3,
+	0xce, 0x2d, 0xb4, 0x03, 0x9b, 0x61, 0xff, 0x3d, 0xa5, 0xb2, 0x13, 0x2d, 0x01, 0x0e, 0x78, 0xda,
+	0x69, 0x3c, 0x1d, 0xc3, 0xbb, 0x89, 0x28, 0xea, 0xaa, 0x9a, 0x44, 0xcf, 0xd7, 0xab, 0xf5, 0x1f,
+	0x8d, 0x07, 0x3f, 0x8f, 0x30, 0x29, 0xe3, 0xb1, 0x45, 0xed, 0x49, 0xe9, 0xa7, 0xa0, 0x20, 0xfc,
+	0xa4, 0xe5, 0x7e, 0x61, 0x3c, 0xfe, 0x37, 0x00, 0x00, 0xff, 0xff, 0x70, 0x61, 0x1e, 0xe3, 0x84,
+	0x09, 0x00, 0x00,
 }

app/proxyman/config.proto

@@ -83,20 +83,8 @@ message OutboundHandlerConfig {
 }
 
 message MultiplexingConfig {
+  // Whether or not Mux is enabled.
   bool enabled = 1;
-}
-
-message SessionFrame {
-  uint32 id = 1;
-
-  enum FrameCommand {
-    SessionNew = 0;
-    SessionKeep = 1;
-    SessionEnd = 2;
-  }
-
-  FrameCommand command = 2;
-
-  v2ray.core.common.net.Endpoint target = 3;
-  bytes payload = 4;
+  // Max number of concurrent connections that one Mux connection can handle.
+  uint32 concurrency = 2;
 }

app/proxyman/mux/mux.go

@@ -10,6 +10,7 @@ import (
 	"v2ray.com/core/app"
 	"v2ray.com/core/app/dispatcher"
 	"v2ray.com/core/app/log"
+	"v2ray.com/core/app/proxyman"
 	"v2ray.com/core/common/buf"
 	"v2ray.com/core/common/net"
 	"v2ray.com/core/common/signal"
@@ -18,8 +19,7 @@ import (
 )
 
 const (
-	maxParallel = 8
-	maxTotal    = 128
+	maxTotal = 128
 )
 
 type manager interface {
@@ -63,12 +63,14 @@ type ClientManager struct {
 	clients []*Client
 	proxy   proxy.Outbound
 	dialer  proxy.Dialer
+	config  *proxyman.MultiplexingConfig
 }
 
-func NewClientManager(p proxy.Outbound, d proxy.Dialer) *ClientManager {
+func NewClientManager(p proxy.Outbound, d proxy.Dialer, c *proxyman.MultiplexingConfig) *ClientManager {
 	return &ClientManager{
 		proxy:  p,
 		dialer: d,
+		config: c,
 	}
 }
 
@@ -118,6 +120,7 @@ type Client struct {
 	cancel         context.CancelFunc
 	manager        *ClientManager
 	session2Remove chan uint16
+	concurrency    uint32
 }
 
 var muxCoolDestination = net.TCPDestination(net.DomainAddress("v1.mux.cool"), net.Port(9527))
@@ -135,6 +138,7 @@ func NewClient(p proxy.Outbound, dialer proxy.Dialer, m *ClientManager) (*Client
 		manager:        m,
 		count:          0,
 		session2Remove: make(chan uint16, 16),
+		concurrency:    m.config.Concurrency,
 	}
 	go c.fetchOutput()
 	go c.monitor()
@@ -225,7 +229,7 @@ func (m *Client) Dispatch(ctx context.Context, outboundRay ray.OutboundRay) bool
 	m.access.Lock()
 	defer m.access.Unlock()
 
-	if len(m.sessions) >= maxParallel {
+	if len(m.sessions) >= m.concurrency {
 		return false
 	}
 

app/proxyman/outbound/handler.go

@@ -62,13 +62,18 @@ func NewHandler(ctx context.Context, config *proxyman.OutboundHandlerConfig) (*H
 	}
 
 	if h.senderSettings != nil && h.senderSettings.MultiplexSettings != nil && h.senderSettings.MultiplexSettings.Enabled {
-		h.mux = mux.NewClientManager(proxyHandler, h)
+		config := h.senderSettings.MultiplexSettings
+		if config.Concurrency < 1 || config.Concurrency > 1024 {
+			return nil, newError("invalid mux concurrency: ", config.Concurrency)
+		}
+		h.mux = mux.NewClientManager(proxyHandler, h, config)
 	}
 
 	h.proxy = proxyHandler
 	return h, nil
 }
 
+// Dispatch implements proxy.Outbound.Dispatch.
 func (h *Handler) Dispatch(ctx context.Context, outboundRay ray.OutboundRay) {
 	if h.mux != nil {
 		err := h.mux.Dispatch(ctx, outboundRay)

tools/conf/v2ray.go

@@ -80,7 +80,15 @@ func (v *InboundConnectionConfig) Build() (*proxyman.InboundHandlerConfig, error
 }
 
 type MuxConfig struct {
-	Enabled bool `json:"enabled"`
+	Enabled     bool   `json:"enabled"`
+	Concurrency uint16 `json:"concurrency"`
+}
+
+func (c *MuxConfig) GetConcurrency() uint16 {
+	if c.Concurrency == 0 {
+		return 8
+	}
+	return c.Concurrency
 }
 
 type OutboundConnectionConfig struct {
@@ -120,7 +128,8 @@ func (v *OutboundConnectionConfig) Build() (*proxyman.OutboundHandlerConfig, err
 
 	if v.MuxSettings != nil && v.MuxSettings.Enabled {
 		senderSettings.MultiplexSettings = &proxyman.MultiplexingConfig{
-			Enabled: true,
+			Enabled:     true,
+			Concurrency: uint32(v.MuxSettings.GetConcurrency()),
 		}
 	}
 
@@ -270,7 +279,8 @@ func (v *OutboundDetourConfig) Build() (*proxyman.OutboundHandlerConfig, error)
 
 	if v.MuxSettings != nil && v.MuxSettings.Enabled {
 		senderSettings.MultiplexSettings = &proxyman.MultiplexingConfig{
-			Enabled: true,
+			Enabled:     true,
+			Concurrency: uint32(v.MuxSettings.GetConcurrency()),
 		}
 	}