Feat: custom TCP Fast Open queue length (#1293)

* Feat: custom TCP Fast Open queue length

* Feat: change default TFO queue length to 4096

infra/conf/transport_internet.go

@@ -387,6 +387,7 @@ func (p TransportProtocol) Build() (string, error) {
 type SocketConfig struct {
 	Mark                 uint32 `json:"mark"`
 	TFO                  *bool  `json:"tcpFastOpen"`
+	TFOQueueLength       uint32 `json:"tcpFastOpenQueueLength"`
 	TProxy               string `json:"tproxy"`
 	AcceptProxyProtocol  bool   `json:"acceptProxyProtocol"`
 	TCPKeepAliveInterval int32  `json:"tcpKeepAliveInterval"`
@@ -402,6 +403,12 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
 			tfoSettings = internet.SocketConfig_Disable
 		}
 	}
+
+	tfoQueueLength := c.TFOQueueLength
+	if tfoQueueLength == 0 {
+		tfoQueueLength = 4096
+	}
+
 	var tproxy internet.SocketConfig_TProxyMode
 	switch strings.ToLower(c.TProxy) {
 	case "tproxy":
@@ -415,6 +422,7 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
 	return &internet.SocketConfig{
 		Mark:                 c.Mark,
 		Tfo:                  tfoSettings,
+		TfoQueueLength:       tfoQueueLength,
 		Tproxy:               tproxy,
 		AcceptProxyProtocol:  c.AcceptProxyProtocol,
 		TcpKeepAliveInterval: c.TCPKeepAliveInterval,

infra/conf/transport_test.go

@@ -35,12 +35,14 @@ func TestSocketConfig(t *testing.T) {
 		{
 			Input: `{
 				"mark": 1,
-				"tcpFastOpen": true
+				"tcpFastOpen": true,
+				"tcpFastOpenQueueLength": 1024
 			}`,
 			Parser: createParser(),
 			Output: &internet.SocketConfig{
-				Mark: 1,
-				Tfo:  internet.SocketConfig_Enable,
+				Mark:           1,
+				Tfo:            internet.SocketConfig_Enable,
+				TfoQueueLength: 1024,
 			},
 		},
 	})

transport/internet/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.27.1
-// 	protoc        v3.18.0--rc2
+// 	protoc        v3.18.0
 // source: transport/internet/config.proto
 
 package internet
@@ -421,6 +421,7 @@ type SocketConfig struct {
 	BindPort                   uint32 `protobuf:"varint,6,opt,name=bind_port,json=bindPort,proto3" json:"bind_port,omitempty"`
 	AcceptProxyProtocol        bool   `protobuf:"varint,7,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
 	TcpKeepAliveInterval       int32  `protobuf:"varint,8,opt,name=tcp_keep_alive_interval,json=tcpKeepAliveInterval,proto3" json:"tcp_keep_alive_interval,omitempty"`
+	TfoQueueLength             uint32 `protobuf:"varint,9,opt,name=tfo_queue_length,json=tfoQueueLength,proto3" json:"tfo_queue_length,omitempty"`
 }
 
 func (x *SocketConfig) Reset() {
@@ -511,6 +512,13 @@ func (x *SocketConfig) GetTcpKeepAliveInterval() int32 {
 	return 0
 }
 
+func (x *SocketConfig) GetTfoQueueLength() uint32 {
+	if x != nil {
+		return x.TfoQueueLength
+	}
+	return 0
+}
+
 var File_transport_internet_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_config_proto_rawDesc = []byte{
@@ -565,7 +573,7 @@ var file_transport_internet_config_proto_rawDesc = []byte{
 	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x74, 0x61, 0x67, 0x12, 0x30, 0x0a, 0x13, 0x74, 0x72,
 	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x4c, 0x61, 0x79, 0x65, 0x72, 0x50, 0x72, 0x6f, 0x78,
 	0x79, 0x18, 0x02, 0x20, 0x01, 0x28, 0x08, 0x52, 0x13, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f,
-	0x72, 0x74, 0x4c, 0x61, 0x79, 0x65, 0x72, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x22, 0x98, 0x04, 0x0a,
+	0x72, 0x74, 0x4c, 0x61, 0x79, 0x65, 0x72, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x22, 0xc2, 0x04, 0x0a,
 	0x0c, 0x53, 0x6f, 0x63, 0x6b, 0x65, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a,
 	0x04, 0x6d, 0x61, 0x72, 0x6b, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x04, 0x6d, 0x61, 0x72,
 	0x6b, 0x12, 0x4e, 0x0a, 0x03, 0x74, 0x66, 0x6f, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x3c,
@@ -592,28 +600,30 @@ var file_transport_internet_config_proto_rawDesc = []byte{
 	0x50, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x12, 0x35, 0x0a, 0x17, 0x74, 0x63, 0x70, 0x5f,
 	0x6b, 0x65, 0x65, 0x70, 0x5f, 0x61, 0x6c, 0x69, 0x76, 0x65, 0x5f, 0x69, 0x6e, 0x74, 0x65, 0x72,
 	0x76, 0x61, 0x6c, 0x18, 0x08, 0x20, 0x01, 0x28, 0x05, 0x52, 0x14, 0x74, 0x63, 0x70, 0x4b, 0x65,
-	0x65, 0x70, 0x41, 0x6c, 0x69, 0x76, 0x65, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x76, 0x61, 0x6c, 0x22,
-	0x35, 0x0a, 0x10, 0x54, 0x43, 0x50, 0x46, 0x61, 0x73, 0x74, 0x4f, 0x70, 0x65, 0x6e, 0x53, 0x74,
-	0x61, 0x74, 0x65, 0x12, 0x08, 0x0a, 0x04, 0x41, 0x73, 0x49, 0x73, 0x10, 0x00, 0x12, 0x0a, 0x0a,
-	0x06, 0x45, 0x6e, 0x61, 0x62, 0x6c, 0x65, 0x10, 0x01, 0x12, 0x0b, 0x0a, 0x07, 0x44, 0x69, 0x73,
-	0x61, 0x62, 0x6c, 0x65, 0x10, 0x02, 0x22, 0x2f, 0x0a, 0x0a, 0x54, 0x50, 0x72, 0x6f, 0x78, 0x79,
-	0x4d, 0x6f, 0x64, 0x65, 0x12, 0x07, 0x0a, 0x03, 0x4f, 0x66, 0x66, 0x10, 0x00, 0x12, 0x0a, 0x0a,
-	0x06, 0x54, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x10, 0x01, 0x12, 0x0c, 0x0a, 0x08, 0x52, 0x65, 0x64,
-	0x69, 0x72, 0x65, 0x63, 0x74, 0x10, 0x02, 0x2a, 0x5a, 0x0a, 0x11, 0x54, 0x72, 0x61, 0x6e, 0x73,
-	0x70, 0x6f, 0x72, 0x74, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x12, 0x07, 0x0a, 0x03,
-	0x54, 0x43, 0x50, 0x10, 0x00, 0x12, 0x07, 0x0a, 0x03, 0x55, 0x44, 0x50, 0x10, 0x01, 0x12, 0x08,
-	0x0a, 0x04, 0x4d, 0x4b, 0x43, 0x50, 0x10, 0x02, 0x12, 0x0d, 0x0a, 0x09, 0x57, 0x65, 0x62, 0x53,
-	0x6f, 0x63, 0x6b, 0x65, 0x74, 0x10, 0x03, 0x12, 0x08, 0x0a, 0x04, 0x48, 0x54, 0x54, 0x50, 0x10,
-	0x04, 0x12, 0x10, 0x0a, 0x0c, 0x44, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x53, 0x6f, 0x63, 0x6b, 0x65,
-	0x74, 0x10, 0x05, 0x42, 0x78, 0x0a, 0x21, 0x63, 0x6f, 0x6d, 0x2e, 0x76, 0x32, 0x72, 0x61, 0x79,
-	0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e,
-	0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x50, 0x01, 0x5a, 0x31, 0x67, 0x69, 0x74, 0x68,
-	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x76, 0x32, 0x66, 0x6c, 0x79, 0x2f, 0x76, 0x32, 0x72,
-	0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x76, 0x34, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73,
-	0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0xaa, 0x02, 0x1d,
-	0x56, 0x32, 0x52, 0x61, 0x79, 0x2e, 0x43, 0x6f, 0x72, 0x65, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73,
-	0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x62, 0x06, 0x70,
-	0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x65, 0x70, 0x41, 0x6c, 0x69, 0x76, 0x65, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x76, 0x61, 0x6c, 0x12,
+	0x28, 0x0a, 0x10, 0x74, 0x66, 0x6f, 0x5f, 0x71, 0x75, 0x65, 0x75, 0x65, 0x5f, 0x6c, 0x65, 0x6e,
+	0x67, 0x74, 0x68, 0x18, 0x09, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x0e, 0x74, 0x66, 0x6f, 0x51, 0x75,
+	0x65, 0x75, 0x65, 0x4c, 0x65, 0x6e, 0x67, 0x74, 0x68, 0x22, 0x35, 0x0a, 0x10, 0x54, 0x43, 0x50,
+	0x46, 0x61, 0x73, 0x74, 0x4f, 0x70, 0x65, 0x6e, 0x53, 0x74, 0x61, 0x74, 0x65, 0x12, 0x08, 0x0a,
+	0x04, 0x41, 0x73, 0x49, 0x73, 0x10, 0x00, 0x12, 0x0a, 0x0a, 0x06, 0x45, 0x6e, 0x61, 0x62, 0x6c,
+	0x65, 0x10, 0x01, 0x12, 0x0b, 0x0a, 0x07, 0x44, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x10, 0x02,
+	0x22, 0x2f, 0x0a, 0x0a, 0x54, 0x50, 0x72, 0x6f, 0x78, 0x79, 0x4d, 0x6f, 0x64, 0x65, 0x12, 0x07,
+	0x0a, 0x03, 0x4f, 0x66, 0x66, 0x10, 0x00, 0x12, 0x0a, 0x0a, 0x06, 0x54, 0x50, 0x72, 0x6f, 0x78,
+	0x79, 0x10, 0x01, 0x12, 0x0c, 0x0a, 0x08, 0x52, 0x65, 0x64, 0x69, 0x72, 0x65, 0x63, 0x74, 0x10,
+	0x02, 0x2a, 0x5a, 0x0a, 0x11, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x50, 0x72,
+	0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x12, 0x07, 0x0a, 0x03, 0x54, 0x43, 0x50, 0x10, 0x00, 0x12,
+	0x07, 0x0a, 0x03, 0x55, 0x44, 0x50, 0x10, 0x01, 0x12, 0x08, 0x0a, 0x04, 0x4d, 0x4b, 0x43, 0x50,
+	0x10, 0x02, 0x12, 0x0d, 0x0a, 0x09, 0x57, 0x65, 0x62, 0x53, 0x6f, 0x63, 0x6b, 0x65, 0x74, 0x10,
+	0x03, 0x12, 0x08, 0x0a, 0x04, 0x48, 0x54, 0x54, 0x50, 0x10, 0x04, 0x12, 0x10, 0x0a, 0x0c, 0x44,
+	0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x53, 0x6f, 0x63, 0x6b, 0x65, 0x74, 0x10, 0x05, 0x42, 0x78, 0x0a,
+	0x21, 0x63, 0x6f, 0x6d, 0x2e, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e,
+	0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
+	0x65, 0x74, 0x50, 0x01, 0x5a, 0x31, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d,
+	0x2f, 0x76, 0x32, 0x66, 0x6c, 0x79, 0x2f, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72,
+	0x65, 0x2f, 0x76, 0x34, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69,
+	0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0xaa, 0x02, 0x1d, 0x56, 0x32, 0x52, 0x61, 0x79, 0x2e,
+	0x43, 0x6f, 0x72, 0x65, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49,
+	0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/config.proto

@@ -93,4 +93,6 @@ message SocketConfig {
   bool accept_proxy_protocol = 7;
 
   int32 tcp_keep_alive_interval = 8;
+
+  uint32 tfo_queue_length = 9;
 }

transport/internet/sockopt_linux.go

@@ -84,8 +84,8 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 	if isTCPSocket(network) {
 		switch config.Tfo {
 		case SocketConfig_Enable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.SOL_TCP, TCP_FASTOPEN, 1); err != nil {
-				return newError("failed to set TCP_FASTOPEN=1").Base(err)
+			if err := syscall.SetsockoptInt(int(fd), syscall.SOL_TCP, TCP_FASTOPEN, int(config.TfoQueueLength)); err != nil {
+				return newError("failed to set TCP_FASTOPEN=", config.TfoQueueLength).Base(err)
 			}
 		case SocketConfig_Disable:
 			if err := syscall.SetsockoptInt(int(fd), syscall.SOL_TCP, TCP_FASTOPEN, 0); err != nil {