Merge pull request #633 from XTLS/feature/h2-health-check

Add health check for h2 & gRPC

infra/conf/grpc.go

@@ -9,8 +9,23 @@ import (
 type GRPCConfig struct {
 	ServiceName         string `json:"serviceName" `
 	MultiMode           bool   `json:"multiMode"`
+	IdleTimeout         int32  `json:"idle_timeout"`
+	HealthCheckTimeout  int32  `json:"health_check_timeout"`
+	PermitWithoutStream bool   `json:"permit_without_stream"`
 }
 
-func (g GRPCConfig) Build() (proto.Message, error) {
+func (g *GRPCConfig) Build() (proto.Message, error) {
-	return &grpc.Config{ServiceName: g.ServiceName, MultiMode: g.MultiMode}, nil
+	if g.IdleTimeout <= 0 {
+		g.IdleTimeout = 0
+	}
+	if g.HealthCheckTimeout <= 0 {
+		g.HealthCheckTimeout = 0
+	}
+	return &grpc.Config{
+		ServiceName:         g.ServiceName,
+		MultiMode:           g.MultiMode,
+		IdleTimeout:         g.IdleTimeout,
+		HealthCheckTimeout:  g.HealthCheckTimeout,
+		PermitWithoutStream: g.PermitWithoutStream,
+	}, nil
 }

infra/conf/transport_internet.go

@@ -181,12 +181,22 @@ func (c *WebSocketConfig) Build() (proto.Message, error) {
 type HTTPConfig struct {
 	Host               *StringList `json:"host"`
 	Path               string      `json:"path"`
+	ReadIdleTimeout    int32       `json:"read_idle_timeout"`
+	HealthCheckTimeout int32       `json:"health_check_timeout"`
 }
 
 // Build implements Buildable.
 func (c *HTTPConfig) Build() (proto.Message, error) {
+	if c.ReadIdleTimeout <= 0 {
+		c.ReadIdleTimeout = 0
+	}
+	if c.HealthCheckTimeout <= 0 {
+		c.HealthCheckTimeout = 0
+	}
 	config := &http.Config{
 		Path:               c.Path,
+		IdleTimeout:        c.ReadIdleTimeout,
+		HealthCheckTimeout: c.HealthCheckTimeout,
 	}
 	if c.Host != nil {
 		config.Host = []string(*c.Host)

transport/internet/grpc/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
+// 	protoc-gen-go v1.26.0
-// 	protoc        v3.15.6
+// 	protoc        v3.17.3
 // source: transport/internet/grpc/config.proto
 
 package grpc
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// This is a compile-time assertion that a sufficiently up-to-date version
-// of the legacy proto package is being used.
-const _ = proto.ProtoPackageIsVersion4
-
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -33,6 +28,9 @@ type Config struct {
 	Host                string `protobuf:"bytes,1,opt,name=host,proto3" json:"host,omitempty"`
 	ServiceName         string `protobuf:"bytes,2,opt,name=service_name,json=serviceName,proto3" json:"service_name,omitempty"`
 	MultiMode           bool   `protobuf:"varint,3,opt,name=multi_mode,json=multiMode,proto3" json:"multi_mode,omitempty"`
+	IdleTimeout         int32  `protobuf:"varint,4,opt,name=idle_timeout,json=idleTimeout,proto3" json:"idle_timeout,omitempty"`
+	HealthCheckTimeout  int32  `protobuf:"varint,5,opt,name=health_check_timeout,json=healthCheckTimeout,proto3" json:"health_check_timeout,omitempty"`
+	PermitWithoutStream bool   `protobuf:"varint,6,opt,name=permit_without_stream,json=permitWithoutStream,proto3" json:"permit_without_stream,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -88,6 +86,27 @@ func (x *Config) GetMultiMode() bool {
 	return false
 }
 
+func (x *Config) GetIdleTimeout() int32 {
+	if x != nil {
+		return x.IdleTimeout
+	}
+	return 0
+}
+
+func (x *Config) GetHealthCheckTimeout() int32 {
+	if x != nil {
+		return x.HealthCheckTimeout
+	}
+	return 0
+}
+
+func (x *Config) GetPermitWithoutStream() bool {
+	if x != nil {
+		return x.PermitWithoutStream
+	}
+	return false
+}
+
 var File_transport_internet_grpc_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_grpc_config_proto_rawDesc = []byte{
@@ -95,17 +114,26 @@ var file_transport_internet_grpc_config_proto_rawDesc = []byte{
 	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
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+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/grpc/config.proto

@@ -7,4 +7,7 @@ message Config {
   string host = 1;
   string service_name = 2;
   bool multi_mode = 3;
+  int32 idle_timeout = 4;
+  int32 health_check_timeout = 5;
+  bool permit_without_stream = 6;
 }

transport/internet/grpc/dial.go

@@ -10,6 +10,7 @@ import (
 	"google.golang.org/grpc/backoff"
 	"google.golang.org/grpc/connectivity"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/keepalive"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
@@ -35,8 +36,7 @@ func init() {
 
 type dialerConf struct {
 	net.Destination
-	*internet.SocketConfig
+	*internet.MemoryStreamConfig
-	*tls.Config
 }
 
 var (
@@ -47,9 +47,7 @@ var (
 func dialgRPC(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (net.Conn, error) {
 	grpcSettings := streamSettings.ProtocolSettings.(*Config)
 
-	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
+	conn, err := getGrpcClient(ctx, dest, streamSettings)
-
-	conn, err := getGrpcClient(ctx, dest, tlsConfig, streamSettings.SocketSettings)
 
 	if err != nil {
 		return nil, newError("Cannot dial gRPC").Base(err)
@@ -72,33 +70,22 @@ func dialgRPC(ctx context.Context, dest net.Destination, streamSettings *interne
 	return encoding.NewHunkConn(grpcService, nil), nil
 }
 
-func getGrpcClient(ctx context.Context, dest net.Destination, tlsConfig *tls.Config, sockopt *internet.SocketConfig) (*grpc.ClientConn, error) {
+func getGrpcClient(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (*grpc.ClientConn, error) {
 	globalDialerAccess.Lock()
 	defer globalDialerAccess.Unlock()
 
 	if globalDialerMap == nil {
 		globalDialerMap = make(map[dialerConf]*grpc.ClientConn)
 	}
+	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
+	sockopt := streamSettings.SocketSettings
+	grpcSettings := streamSettings.ProtocolSettings.(*Config)
 
-	if client, found := globalDialerMap[dialerConf{dest, sockopt, tlsConfig}]; found && client.GetState() != connectivity.Shutdown {
+	if client, found := globalDialerMap[dialerConf{dest, streamSettings}]; found && client.GetState() != connectivity.Shutdown {
 		return client, nil
 	}
 
-	dialOption := grpc.WithInsecure()
+	var dialOptions = []grpc.DialOption{
-
-	if tlsConfig != nil {
-		dialOption = grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig.GetTLSConfig()))
-	}
-
-	var grpcDestHost string
-	if dest.Address.Family().IsDomain() {
-		grpcDestHost = dest.Address.Domain()
-	} else {
-		grpcDestHost = dest.Address.IP().String()
-	}
-	conn, err := grpc.Dial(
-		gonet.JoinHostPort(grpcDestHost, dest.Port.String()),
-		dialOption,
 		grpc.WithConnectParams(grpc.ConnectParams{
 			Backoff: backoff.Config{
 				BaseDelay:  500 * time.Millisecond,
@@ -132,7 +119,33 @@ func getGrpcClient(ctx context.Context, dest net.Destination, tlsConfig *tls.Con
 			address := net.ParseAddress(rawHost)
 			return internet.DialSystem(gctx, net.TCPDestination(address, port), sockopt)
 		}),
+	}
+
+	if tlsConfig != nil {
+		dialOptions = append(dialOptions, grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig.GetTLSConfig())))
+	} else {
+		dialOptions = append(dialOptions, grpc.WithInsecure())
+	}
+
+	if grpcSettings.IdleTimeout > 0 || grpcSettings.HealthCheckTimeout > 0 || grpcSettings.PermitWithoutStream {
+		dialOptions = append(dialOptions, grpc.WithKeepaliveParams(keepalive.ClientParameters{
+			Time:                time.Second * time.Duration(grpcSettings.IdleTimeout),
+			Timeout:             time.Second * time.Duration(grpcSettings.HealthCheckTimeout),
+			PermitWithoutStream: grpcSettings.PermitWithoutStream,
+		}))
+	}
+
+	var grpcDestHost string
+	if dest.Address.Family().IsDomain() {
+		grpcDestHost = dest.Address.Domain()
+	} else {
+		grpcDestHost = dest.Address.IP().String()
+	}
+
+	conn, err := grpc.Dial(
+		gonet.JoinHostPort(grpcDestHost, dest.Port.String()),
+		dialOptions...,
 	)
-	globalDialerMap[dialerConf{dest, sockopt, tlsConfig}] = conn
+	globalDialerMap[dialerConf{dest, streamSettings}] = conn
 	return conn, err
 }

transport/internet/grpc/hub.go

@@ -2,9 +2,11 @@ package grpc
 
 import (
 	"context"
+	"time"
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/keepalive"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
@@ -75,12 +77,19 @@ func Listen(ctx context.Context, address net.Address, port net.Port, settings *i
 
 	config := tls.ConfigFromStreamSettings(settings)
 
+	var options []grpc.ServerOption
 	var s *grpc.Server
-	if config == nil {
+	if config != nil {
-		s = grpc.NewServer()
+		options = append(options, grpc.Creds(credentials.NewTLS(config.GetTLSConfig(tls.WithNextProto("h2")))))
-	} else {
-		s = grpc.NewServer(grpc.Creds(credentials.NewTLS(config.GetTLSConfig(tls.WithNextProto("h2")))))
 	}
+	if grpcSettings.IdleTimeout > 0 || grpcSettings.HealthCheckTimeout > 0 {
+		options = append(options, grpc.KeepaliveParams(keepalive.ServerParameters{
+			Time:    time.Second * time.Duration(grpcSettings.IdleTimeout),
+			Timeout: time.Second * time.Duration(grpcSettings.HealthCheckTimeout),
+		}))
+	}
+
+	s = grpc.NewServer(options...)
 	listener.s = s
 
 	if settings.SocketSettings != nil && settings.SocketSettings.AcceptProxyProtocol {

transport/internet/http/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
+// 	protoc-gen-go v1.26.0
-// 	protoc        v3.14.0
+// 	protoc        v3.17.3
 // source: transport/internet/http/config.proto
 
 package http
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// This is a compile-time assertion that a sufficiently up-to-date version
-// of the legacy proto package is being used.
-const _ = proto.ProtoPackageIsVersion4
-
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -32,6 +27,8 @@ type Config struct {
 
 	Host               []string `protobuf:"bytes,1,rep,name=host,proto3" json:"host,omitempty"`
 	Path               string   `protobuf:"bytes,2,opt,name=path,proto3" json:"path,omitempty"`
+	IdleTimeout        int32    `protobuf:"varint,3,opt,name=idle_timeout,json=idleTimeout,proto3" json:"idle_timeout,omitempty"`
+	HealthCheckTimeout int32    `protobuf:"varint,4,opt,name=health_check_timeout,json=healthCheckTimeout,proto3" json:"health_check_timeout,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -80,6 +77,20 @@ func (x *Config) GetPath() string {
 	return ""
 }
 
+func (x *Config) GetIdleTimeout() int32 {
+	if x != nil {
+		return x.IdleTimeout
+	}
+	return 0
+}
+
+func (x *Config) GetHealthCheckTimeout() int32 {
+	if x != nil {
+		return x.HealthCheckTimeout
+	}
+	return 0
+}
+
 var File_transport_internet_http_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_http_config_proto_rawDesc = []byte{
@@ -87,18 +98,23 @@ var file_transport_internet_http_config_proto_rawDesc = []byte{
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+	0x75, 0x74, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x52, 0x12, 0x68, 0x65, 0x61, 0x6c, 0x74, 0x68,
-	0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x68, 0x74, 0x74, 0x70, 0xaa,
+	0x43, 0x68, 0x65, 0x63, 0x6b, 0x54, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x42, 0x76, 0x0a, 0x20,
-	0x02, 0x1c, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74,
+	0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f,
-	0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x48, 0x74, 0x74, 0x70, 0x62, 0x06,
+	0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x68, 0x74, 0x74, 0x70,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x50, 0x01, 0x5a, 0x31, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78,
+	0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72,
+	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
+	0x2f, 0x68, 0x74, 0x74, 0x70, 0xaa, 0x02, 0x1c, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61,
+	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e,
+	0x48, 0x74, 0x74, 0x70, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/http/config.proto

@@ -9,4 +9,6 @@ option java_multiple_files = true;
 message Config {
   repeated string host = 1;
   string path = 2;
+  int32 idle_timeout = 3;
+  int32 health_check_timeout = 4;
 }

transport/internet/http/dialer.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/url"
 	"sync"
+	"time"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
@@ -20,8 +21,7 @@ import (
 
 type dialerConf struct {
 	net.Destination
-	*internet.SocketConfig
+	*internet.MemoryStreamConfig
-	*tls.Config
 }
 
 var (
@@ -29,7 +29,7 @@ var (
 	globalDialerAccess sync.Mutex
 )
 
-func getHTTPClient(ctx context.Context, dest net.Destination, tlsSettings *tls.Config, sockopt *internet.SocketConfig) (*http.Client, error) {
+func getHTTPClient(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (*http.Client, error) {
 	globalDialerAccess.Lock()
 	defer globalDialerAccess.Unlock()
 
@@ -37,7 +37,14 @@ func getHTTPClient(ctx context.Context, dest net.Destination, tlsSettings *tls.C
 		globalDialerMap = make(map[dialerConf]*http.Client)
 	}
 
-	if client, found := globalDialerMap[dialerConf{dest, sockopt, tlsSettings}]; found {
+	httpSettings := streamSettings.ProtocolSettings.(*Config)
+	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
+	if tlsConfig == nil {
+		return nil, newError("TLS must be enabled for http transport.").AtWarning()
+	}
+	sockopt := streamSettings.SocketSettings
+
+	if client, found := globalDialerMap[dialerConf{dest, streamSettings}]; found {
 		return client, nil
 	}
 
@@ -86,25 +93,26 @@ func getHTTPClient(ctx context.Context, dest net.Destination, tlsSettings *tls.C
 			}
 			return cn, nil
 		},
-		TLSClientConfig: tlsSettings.GetTLSConfig(tls.WithDestination(dest)),
+		TLSClientConfig: tlsConfig.GetTLSConfig(tls.WithDestination(dest)),
+	}
+
+	if httpSettings.IdleTimeout > 0 || httpSettings.HealthCheckTimeout > 0 {
+		transport.ReadIdleTimeout = time.Second * time.Duration(httpSettings.IdleTimeout)
+		transport.PingTimeout = time.Second * time.Duration(httpSettings.HealthCheckTimeout)
 	}
 
 	client := &http.Client{
 		Transport: transport,
 	}
 
-	globalDialerMap[dialerConf{dest, sockopt, tlsSettings}] = client
+	globalDialerMap[dialerConf{dest, streamSettings}] = client
 	return client, nil
 }
 
 // Dial dials a new TCP connection to the given destination.
 func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
 	httpSettings := streamSettings.ProtocolSettings.(*Config)
-	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
+	client, err := getHTTPClient(ctx, dest, streamSettings)
-	if tlsConfig == nil {
-		return nil, newError("TLS must be enabled for http transport.").AtWarning()
-	}
-	client, err := getHTTPClient(ctx, dest, tlsConfig, streamSettings.SocketSettings)
 	if err != nil {
 		return nil, err
 	}