network observatory service

app/observatory/config.pb.go

@@ -25,6 +25,53 @@ const (
 // of the legacy proto package is being used.
 const _ = proto.ProtoPackageIsVersion4
 
+type ObservationResult struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Status []*OutboundStatus `protobuf:"bytes,1,rep,name=status,proto3" json:"status,omitempty"`
+}
+
+func (x *ObservationResult) Reset() {
+	*x = ObservationResult{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_config_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ObservationResult) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ObservationResult) ProtoMessage() {}
+
+func (x *ObservationResult) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_config_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ObservationResult.ProtoReflect.Descriptor instead.
+func (*ObservationResult) Descriptor() ([]byte, []int) {
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *ObservationResult) GetStatus() []*OutboundStatus {
+	if x != nil {
+		return x.Status
+	}
+	return nil
+}
+
 type OutboundStatus struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -36,19 +83,25 @@ type OutboundStatus struct {
 	// @Document The time for probe request to finish.
 	//@Type time.ms
 	//@Restriction ReadOnlyForUser
-	Delay uint32 `protobuf:"varint,2,opt,name=delay,proto3" json:"delay,omitempty"`
+	Delay int64 `protobuf:"varint,2,opt,name=delay,proto3" json:"delay,omitempty"`
 	// @Document The last error caused this outbound failed to relay probe request
 	//@Restriction NotMachineReadable
 	LastErrorReason string `protobuf:"bytes,3,opt,name=last_error_reason,json=lastErrorReason,proto3" json:"last_error_reason,omitempty"`
 	// @Document The outbound tag for this Server
 	//@Type id.outboundTag
 	OutboundTag string `protobuf:"bytes,4,opt,name=outbound_tag,json=outboundTag,proto3" json:"outbound_tag,omitempty"`
+	// @Document The time this outbound is known to be alive
+	//@Type id.outboundTag
+	LastSeenTime int64 `protobuf:"varint,5,opt,name=last_seen_time,json=lastSeenTime,proto3" json:"last_seen_time,omitempty"`
+	// @Document The time this outbound is tried
+	//@Type id.outboundTag
+	LastTryTime int64 `protobuf:"varint,6,opt,name=last_try_time,json=lastTryTime,proto3" json:"last_try_time,omitempty"`
 }
 
 func (x *OutboundStatus) Reset() {
 	*x = OutboundStatus{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_app_observatory_config_proto_msgTypes[0]
+		mi := &file_app_observatory_config_proto_msgTypes[1]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -61,7 +114,7 @@ func (x *OutboundStatus) String() string {
 func (*OutboundStatus) ProtoMessage() {}
 
 func (x *OutboundStatus) ProtoReflect() protoreflect.Message {
-	mi := &file_app_observatory_config_proto_msgTypes[0]
+	mi := &file_app_observatory_config_proto_msgTypes[1]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -74,7 +127,7 @@ func (x *OutboundStatus) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OutboundStatus.ProtoReflect.Descriptor instead.
 func (*OutboundStatus) Descriptor() ([]byte, []int) {
-	return file_app_observatory_config_proto_rawDescGZIP(), []int{0}
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{1}
 }
 
 func (x *OutboundStatus) GetAlive() bool {
@@ -84,7 +137,7 @@ func (x *OutboundStatus) GetAlive() bool {
 	return false
 }
 
-func (x *OutboundStatus) GetDelay() uint32 {
+func (x *OutboundStatus) GetDelay() int64 {
 	if x != nil {
 		return x.Delay
 	}
@@ -105,6 +158,90 @@ func (x *OutboundStatus) GetOutboundTag() string {
 	return ""
 }
 
+func (x *OutboundStatus) GetLastSeenTime() int64 {
+	if x != nil {
+		return x.LastSeenTime
+	}
+	return 0
+}
+
+func (x *OutboundStatus) GetLastTryTime() int64 {
+	if x != nil {
+		return x.LastTryTime
+	}
+	return 0
+}
+
+type ProbeResult struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// @Document Whether this outbound is usable
+	//@Restriction ReadOnlyForUser
+	Alive bool `protobuf:"varint,1,opt,name=alive,proto3" json:"alive,omitempty"`
+	// @Document The time for probe request to finish.
+	//@Type time.ms
+	//@Restriction ReadOnlyForUser
+	Delay int64 `protobuf:"varint,2,opt,name=delay,proto3" json:"delay,omitempty"`
+	// @Document The error caused this outbound failed to relay probe request
+	//@Restriction NotMachineReadable
+	LastErrorReason string `protobuf:"bytes,3,opt,name=last_error_reason,json=lastErrorReason,proto3" json:"last_error_reason,omitempty"`
+}
+
+func (x *ProbeResult) Reset() {
+	*x = ProbeResult{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_observatory_config_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ProbeResult) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ProbeResult) ProtoMessage() {}
+
+func (x *ProbeResult) ProtoReflect() protoreflect.Message {
+	mi := &file_app_observatory_config_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ProbeResult.ProtoReflect.Descriptor instead.
+func (*ProbeResult) Descriptor() ([]byte, []int) {
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *ProbeResult) GetAlive() bool {
+	if x != nil {
+		return x.Alive
+	}
+	return false
+}
+
+func (x *ProbeResult) GetDelay() int64 {
+	if x != nil {
+		return x.Delay
+	}
+	return 0
+}
+
+func (x *ProbeResult) GetLastErrorReason() string {
+	if x != nil {
+		return x.LastErrorReason
+	}
+	return ""
+}
+
 type Intensity struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -118,7 +255,7 @@ type Intensity struct {
 func (x *Intensity) Reset() {
 	*x = Intensity{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_app_observatory_config_proto_msgTypes[1]
+		mi := &file_app_observatory_config_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -131,7 +268,7 @@ func (x *Intensity) String() string {
 func (*Intensity) ProtoMessage() {}
 
 func (x *Intensity) ProtoReflect() protoreflect.Message {
-	mi := &file_app_observatory_config_proto_msgTypes[1]
+	mi := &file_app_observatory_config_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -144,7 +281,7 @@ func (x *Intensity) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Intensity.ProtoReflect.Descriptor instead.
 func (*Intensity) Descriptor() ([]byte, []int) {
-	return file_app_observatory_config_proto_rawDescGZIP(), []int{1}
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *Intensity) GetProbeInterval() uint32 {
@@ -166,7 +303,7 @@ type Config struct {
 func (x *Config) Reset() {
 	*x = Config{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_app_observatory_config_proto_msgTypes[2]
+		mi := &file_app_observatory_config_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -179,7 +316,7 @@ func (x *Config) String() string {
 func (*Config) ProtoMessage() {}
 
 func (x *Config) ProtoReflect() protoreflect.Message {
-	mi := &file_app_observatory_config_proto_msgTypes[2]
+	mi := &file_app_observatory_config_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -192,7 +329,7 @@ func (x *Config) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Config.ProtoReflect.Descriptor instead.
 func (*Config) Descriptor() ([]byte, []int) {
-	return file_app_observatory_config_proto_rawDescGZIP(), []int{2}
+	return file_app_observatory_config_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *Config) GetSubjectSelector() []string {
@@ -208,30 +345,47 @@ var file_app_observatory_config_proto_rawDesc = []byte{
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+	0x02, 0x1a, 0x56, 0x32, 0x52, 0x61, 0x79, 0x2e, 0x43, 0x6f, 0x72, 0x65, 0x2e, 0x41, 0x70, 0x70,
+	0x2e, 0x4f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -246,18 +400,21 @@ func file_app_observatory_config_proto_rawDescGZIP() []byte {
 	return file_app_observatory_config_proto_rawDescData
 }
 
-var file_app_observatory_config_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_app_observatory_config_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
 var file_app_observatory_config_proto_goTypes = []interface{}{
-	(*OutboundStatus)(nil), // 0: v2ray.core.app.observatory.OutboundStatus
-	(*Intensity)(nil),      // 1: v2ray.core.app.observatory.Intensity
-	(*Config)(nil),         // 2: v2ray.core.app.observatory.Config
+	(*ObservationResult)(nil), // 0: v2ray.core.app.observatory.ObservationResult
+	(*OutboundStatus)(nil),    // 1: v2ray.core.app.observatory.OutboundStatus
+	(*ProbeResult)(nil),       // 2: v2ray.core.app.observatory.ProbeResult
+	(*Intensity)(nil),         // 3: v2ray.core.app.observatory.Intensity
+	(*Config)(nil),            // 4: v2ray.core.app.observatory.Config
 }
 var file_app_observatory_config_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	1, // 0: v2ray.core.app.observatory.ObservationResult.status:type_name -> v2ray.core.app.observatory.OutboundStatus
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
 }
 
 func init() { file_app_observatory_config_proto_init() }
@@ -267,7 +424,7 @@ func file_app_observatory_config_proto_init() {
 	}
 	if !protoimpl.UnsafeEnabled {
 		file_app_observatory_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*OutboundStatus); i {
+			switch v := v.(*ObservationResult); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -279,7 +436,7 @@ func file_app_observatory_config_proto_init() {
 			}
 		}
 		file_app_observatory_config_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Intensity); i {
+			switch v := v.(*OutboundStatus); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -291,6 +448,30 @@ func file_app_observatory_config_proto_init() {
 			}
 		}
 		file_app_observatory_config_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ProbeResult); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_config_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Intensity); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_observatory_config_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Config); i {
 			case 0:
 				return &v.state
@@ -309,7 +490,7 @@ func file_app_observatory_config_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_observatory_config_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   3,
+			NumMessages:   5,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

app/observatory/config.proto

@@ -19,7 +19,7 @@ message OutboundStatus{
      @Type time.ms
      @Restriction ReadOnlyForUser
   */
-  uint32 delay = 2;
+  int64 delay = 2;
   /* @Document The last error caused this outbound failed to relay probe request
      @Restriction NotMachineReadable
   */
@@ -38,6 +38,22 @@ message OutboundStatus{
   int64 last_try_time = 6;
 }
 
+message ProbeResult{
+  /* @Document Whether this outbound is usable
+     @Restriction ReadOnlyForUser
+  */
+  bool alive = 1;
+  /* @Document The time for probe request to finish.
+     @Type time.ms
+     @Restriction ReadOnlyForUser
+  */
+  int64 delay = 2;
+  /* @Document The error caused this outbound failed to relay probe request
+   @Restriction NotMachineReadable
+*/
+  string last_error_reason = 3;
+}
+
 message Intensity{
   /* @Document The time interval for a probe request in ms.
      @Type time.ms

app/observatory/observer.go

@@ -2,10 +2,20 @@ package observatory
 
 import (
 	"context"
+	"github.com/golang/protobuf/proto"
+	core "github.com/v2fly/v2ray-core/v4"
+	"github.com/v2fly/v2ray-core/v4/common"
+	v2net "github.com/v2fly/v2ray-core/v4/common/net"
 	"github.com/v2fly/v2ray-core/v4/common/signal/done"
+	"github.com/v2fly/v2ray-core/v4/common/task"
 	"github.com/v2fly/v2ray-core/v4/features/extension"
 	"github.com/v2fly/v2ray-core/v4/features/outbound"
+	"github.com/v2fly/v2ray-core/v4/transport/internet/tagged"
+	"net"
+	"net/http"
+	"net/url"
 	"sync"
+	"time"
 )
 
 type Observer struct {
@@ -13,13 +23,17 @@ type Observer struct {
 	ctx    context.Context
 
 	statusLock sync.Mutex
-	status     []OutboundStatus
+	status     []*OutboundStatus
 
 	finished *done.Instance
 
 	ohm outbound.Manager
 }
 
+func (o *Observer) GetObservation(ctx context.Context) (proto.Message, error) {
+	return &ObservationResult{Status: o.status}, nil
+}
+
 func (o *Observer) Type() interface{} {
 	return extension.ObservatoryType()
 }
@@ -41,13 +55,136 @@ func (o *Observer) background() {
 			newError("outbound.Manager is not a HandlerSelector").WriteToLog()
 			return
 		}
+
 		outbounds := hs.Select(o.config.SubjectSelector)
 
+		o.updateStatus(outbounds)
+
+		for _, v := range outbounds {
+			result := o.probe(v)
+			o.updateStatusForResult(v, &result)
+			if o.finished.Done() {
+				return
+			}
+			time.Sleep(time.Second * 10)
+		}
+
 	}
 }
+
 func (o *Observer) updateStatus(outbounds []string) {
 	o.statusLock.Lock()
 	defer o.statusLock.Unlock()
+	//TODO should remove old inbound that is removed
+}
+
+func (o *Observer) probe(outbound string) ProbeResult {
+	httpTransport := http.Transport{
+		Proxy: func(*http.Request) (*url.URL, error) {
+			return nil, nil
+		},
+		DialContext: func(ctx context.Context, network string, addr string) (net.Conn, error) {
+			var connection net.Conn
+			taskErr := task.Run(ctx, func() error {
+				//MUST use V2Fly's built in context system
+				dest, err := v2net.ParseDestination(network + ":" + addr)
+				if err != nil {
+					return newError("cannot understand address").Base(err)
+				}
+				conn, err := tagged.Dialer(o.ctx, dest, outbound)
+				if err != nil {
+					return newError("cannot dial remote address", dest).Base(err)
+				}
+				connection = conn
+				return nil
+			})
+			if taskErr != nil {
+				return nil, newError("cannot finish connection").Base(taskErr)
+			}
+			return connection, nil
+		},
+		TLSHandshakeTimeout: time.Duration(time.Second * 5),
+	}
+	httpClient := &http.Client{
+		Transport: &httpTransport,
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+		Jar:     nil,
+		Timeout: time.Duration(time.Second * 5),
+	}
+	var GETTime time.Duration
+	err := task.Run(o.ctx, func() error {
+		startTime := time.Now()
+		response, err := httpClient.Get("https://api.v2fly.org/checkConnection.svgz")
+		if err != nil {
+			return newError("outbound failed to relay connection").Base(err)
+		}
+		if response.Body != nil {
+			response.Body.Close()
+		}
+		endTime := time.Now()
+		GETTime = endTime.Sub(startTime)
+		return nil
+	})
+	if err != nil {
+		newError("the outbound ", outbound, "is dead:").Base(err).AtInfo().WriteToLog()
+		return ProbeResult{Alive: false, LastErrorReason: err.Error()}
+	}
+	newError("the outbound ", outbound, "is alive:", GETTime.Seconds()).AtInfo().WriteToLog()
+	return ProbeResult{Alive: true, Delay: GETTime.Milliseconds()}
+}
+
+func (o *Observer) updateStatusForResult(outbound string, result *ProbeResult) {
+	o.statusLock.Lock()
+	defer o.statusLock.Unlock()
+	var status *OutboundStatus
+	if location := o.findStatusLocationLockHolderOnly(outbound); location != -1 {
+		status = o.status[location]
+	} else {
+		status = &OutboundStatus{}
+		o.status = append(o.status, status)
+	}
+
+	status.LastTryTime = time.Now().Unix()
+	status.OutboundTag = outbound
+	status.Alive = result.Alive
+	if result.Alive {
+		status.Delay = result.Delay
+		status.LastSeenTime = status.LastTryTime
+		status.LastErrorReason = ""
+	} else {
+		status.LastErrorReason = result.LastErrorReason
+		status.Delay = 99999999
+	}
+}
+
+func (o *Observer) findStatusLocationLockHolderOnly(outbound string) int {
+	for i, v := range o.status {
+		if v.OutboundTag == outbound {
+			return i
+		}
+	}
+	return -1
+}
+
+func New(ctx context.Context, config *Config) (*Observer, error) {
+	var outboundManager outbound.Manager
+	err := core.RequireFeatures(ctx, func(om outbound.Manager) {
+		outboundManager = om
+	})
+	if err != nil {
+		return nil, newError("Cannot get depended features").Base(err)
+	}
+	return &Observer{
+		config: config,
+		ctx:    ctx,
+		ohm:    outboundManager,
+	}, nil
+}
 
-	o.status
+func init() {
+	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
+		return New(ctx, config.(*Config))
+	}))
 }