Merge 4f5dbf9b72 into 51504c624c

Bumps [github.com/quic-go/quic-go](https://github.com/quic-go/quic-go) from 0.42.0 to 0.43.0.
- [Release notes](https://github.com/quic-go/quic-go/releases)
- [Changelog](https://github.com/quic-go/quic-go/blob/master/Changelog.md)
- [Commits](https://github.com/quic-go/quic-go/compare/v0.42.0...v0.43.0)

---
updated-dependencies:
- dependency-name: github.com/quic-go/quic-go
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/release.yml

@@ -1,5 +1,11 @@
 name: Build and Release
 
+# NOTE: This Github Actions file depends on the Makefile.
+#       Building the correct package requires the correct binaries generated by the Makefile. To 
+#       ensure the correct output, the Makefile must accept the appropriate input and compile the 
+#       correct file with the correct name. If you need to modify this file, please ensure it won't 
+#       disrupt the Makefile.
+
 on:
   workflow_dispatch:
   release:

Makefile

@@ -2,6 +2,17 @@ NAME = xray
 
 VERSION=$(shell git describe --always --dirty)
 
+# NOTE: This MAKEFILE can be used to build Xray-core locally and in Automatic workflows. It is \
+	provided for convinience in automatic building and functions as a part of it.
+# NOTE: If you need to modify this file, please be aware that:\
+	- This file is not the main Makefile; it only accepts environment variables and builds the \
+	binary.\
+	- Automatic building expects the correct binaries to be built by this Makefile. If you \
+	intend to propose a change to this Makefile, carefully review the file below and ensure \
+	that the change will not accidently break the automatic building:\
+		.github/workflows/release.yml \
+	Otherwise it is recommended to contact the project maintainers.
+
 LDFLAGS = -X github.com/xtls/xray-core/core.build=$(VERSION) -s -w -buildid=
 PARAMS = -trimpath -ldflags "$(LDFLAGS)" -v
 MAIN = ./main

app/policy/config.go

@@ -27,6 +27,9 @@ func defaultPolicy() *Policy {
 		Buffer: &Policy_Buffer{
 			Connection: p.Buffer.PerConnection,
 		},
+		Restriction: &Policy_Restriction{
+			MaxIPs: p.Restriction.MaxIPs,
+		},
 	}
 }
 
@@ -58,6 +61,11 @@ func (p *Policy) overrideWith(another *Policy) {
 			Connection: another.Buffer.Connection,
 		}
 	}
+	if another.Restriction != nil {
+		p.Restriction = &Policy_Restriction{
+			MaxIPs: another.Restriction.MaxIPs,
+		}
+	}
 }
 
 // ToCorePolicy converts this Policy to policy.Session.
@@ -77,6 +85,9 @@ func (p *Policy) ToCorePolicy() policy.Session {
 	if p.Buffer != nil {
 		cp.Buffer.PerConnection = p.Buffer.Connection
 	}
+	if p.Restriction != nil {
+		cp.Restriction.MaxIPs = p.Restriction.MaxIPs
+	}
 	return cp
 }
 

app/policy/config.pb.go

@@ -72,9 +72,10 @@ type Policy struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Timeout *Policy_Timeout `protobuf:"bytes,1,opt,name=timeout,proto3" json:"timeout,omitempty"`
-	Stats   *Policy_Stats   `protobuf:"bytes,2,opt,name=stats,proto3" json:"stats,omitempty"`
-	Buffer  *Policy_Buffer  `protobuf:"bytes,3,opt,name=buffer,proto3" json:"buffer,omitempty"`
+	Timeout     *Policy_Timeout     `protobuf:"bytes,1,opt,name=timeout,proto3" json:"timeout,omitempty"`
+	Stats       *Policy_Stats       `protobuf:"bytes,2,opt,name=stats,proto3" json:"stats,omitempty"`
+	Buffer      *Policy_Buffer      `protobuf:"bytes,3,opt,name=buffer,proto3" json:"buffer,omitempty"`
+	Restriction *Policy_Restriction `protobuf:"bytes,4,opt,name=restriction,proto3" json:"restriction,omitempty"`
 }
 
 func (x *Policy) Reset() {
@@ -130,6 +131,13 @@ func (x *Policy) GetBuffer() *Policy_Buffer {
 	return nil
 }
 
+func (x *Policy) GetRestriction() *Policy_Restriction {
+	if x != nil {
+		return x.Restriction
+	}
+	return nil
+}
+
 type SystemPolicy struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -407,6 +415,53 @@ func (x *Policy_Buffer) GetConnection() int32 {
 	return 0
 }
 
+type Policy_Restriction struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	MaxIPs int32 `protobuf:"varint,1,opt,name=maxIPs,proto3" json:"maxIPs,omitempty"`
+}
+
+func (x *Policy_Restriction) Reset() {
+	*x = Policy_Restriction{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_policy_config_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Policy_Restriction) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Policy_Restriction) ProtoMessage() {}
+
+func (x *Policy_Restriction) ProtoReflect() protoreflect.Message {
+	mi := &file_app_policy_config_proto_msgTypes[7]
+	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 Policy_Restriction.ProtoReflect.Descriptor instead.
+func (*Policy_Restriction) Descriptor() ([]byte, []int) {
+	return file_app_policy_config_proto_rawDescGZIP(), []int{1, 3}
+}
+
+func (x *Policy_Restriction) GetMaxIPs() int32 {
+	if x != nil {
+		return x.MaxIPs
+	}
+	return 0
+}
+
 type SystemPolicy_Stats struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -421,7 +476,7 @@ type SystemPolicy_Stats struct {
 func (x *SystemPolicy_Stats) Reset() {
 	*x = SystemPolicy_Stats{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_app_policy_config_proto_msgTypes[7]
+		mi := &file_app_policy_config_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -434,7 +489,7 @@ func (x *SystemPolicy_Stats) String() string {
 func (*SystemPolicy_Stats) ProtoMessage() {}
 
 func (x *SystemPolicy_Stats) ProtoReflect() protoreflect.Message {
-	mi := &file_app_policy_config_proto_msgTypes[7]
+	mi := &file_app_policy_config_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -485,7 +540,7 @@ var file_app_policy_config_proto_rawDesc = []byte{
 	0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0f, 0x78, 0x72, 0x61, 0x79, 0x2e,
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 	0x63, 0x6f, 0x6e, 0x64, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x01, 0x20,
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+	0x01, 0x28, 0x0d, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x22, 0x94, 0x05, 0x0a, 0x06, 0x50,
 	0x6f, 0x6c, 0x69, 0x63, 0x79, 0x12, 0x39, 0x0a, 0x07, 0x74, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74,
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@@ -496,65 +551,72 @@ var file_app_policy_config_proto_rawDesc = []byte{
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+	0x69, 0x63, 0x79, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x3a, 0x02, 0x38, 0x01, 0x42, 0x4f,
+	0x0a, 0x13, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x70,
+	0x6f, 0x6c, 0x69, 0x63, 0x79, 0x50, 0x01, 0x5a, 0x24, 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, 0x61, 0x70, 0x70, 0x2f, 0x70, 0x6f, 0x6c, 0x69, 0x63, 0x79, 0xaa, 0x02, 0x0f,
+	0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x50, 0x6f, 0x6c, 0x69, 0x63, 0x79, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -569,7 +631,7 @@ func file_app_policy_config_proto_rawDescGZIP() []byte {
 	return file_app_policy_config_proto_rawDescData
 }
 
-var file_app_policy_config_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
+var file_app_policy_config_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
 var file_app_policy_config_proto_goTypes = []interface{}{
 	(*Second)(nil),             // 0: xray.app.policy.Second
 	(*Policy)(nil),             // 1: xray.app.policy.Policy
@@ -578,26 +640,28 @@ var file_app_policy_config_proto_goTypes = []interface{}{
 	(*Policy_Timeout)(nil),     // 4: xray.app.policy.Policy.Timeout
 	(*Policy_Stats)(nil),       // 5: xray.app.policy.Policy.Stats
 	(*Policy_Buffer)(nil),      // 6: xray.app.policy.Policy.Buffer
-	(*SystemPolicy_Stats)(nil), // 7: xray.app.policy.SystemPolicy.Stats
-	nil,                        // 8: xray.app.policy.Config.LevelEntry
+	(*Policy_Restriction)(nil), // 7: xray.app.policy.Policy.Restriction
+	(*SystemPolicy_Stats)(nil), // 8: xray.app.policy.SystemPolicy.Stats
+	nil,                        // 9: xray.app.policy.Config.LevelEntry
 }
 var file_app_policy_config_proto_depIdxs = []int32{
 	4,  // 0: xray.app.policy.Policy.timeout:type_name -> xray.app.policy.Policy.Timeout
 	5,  // 1: xray.app.policy.Policy.stats:type_name -> xray.app.policy.Policy.Stats
 	6,  // 2: xray.app.policy.Policy.buffer:type_name -> xray.app.policy.Policy.Buffer
-	7,  // 3: xray.app.policy.SystemPolicy.stats:type_name -> xray.app.policy.SystemPolicy.Stats
-	8,  // 4: xray.app.policy.Config.level:type_name -> xray.app.policy.Config.LevelEntry
-	2,  // 5: xray.app.policy.Config.system:type_name -> xray.app.policy.SystemPolicy
-	0,  // 6: xray.app.policy.Policy.Timeout.handshake:type_name -> xray.app.policy.Second
-	0,  // 7: xray.app.policy.Policy.Timeout.connection_idle:type_name -> xray.app.policy.Second
-	0,  // 8: xray.app.policy.Policy.Timeout.uplink_only:type_name -> xray.app.policy.Second
-	0,  // 9: xray.app.policy.Policy.Timeout.downlink_only:type_name -> xray.app.policy.Second
-	1,  // 10: xray.app.policy.Config.LevelEntry.value:type_name -> xray.app.policy.Policy
-	11, // [11:11] is the sub-list for method output_type
-	11, // [11:11] is the sub-list for method input_type
-	11, // [11:11] is the sub-list for extension type_name
-	11, // [11:11] is the sub-list for extension extendee
-	0,  // [0:11] is the sub-list for field type_name
+	7,  // 3: xray.app.policy.Policy.restriction:type_name -> xray.app.policy.Policy.Restriction
+	8,  // 4: xray.app.policy.SystemPolicy.stats:type_name -> xray.app.policy.SystemPolicy.Stats
+	9,  // 5: xray.app.policy.Config.level:type_name -> xray.app.policy.Config.LevelEntry
+	2,  // 6: xray.app.policy.Config.system:type_name -> xray.app.policy.SystemPolicy
+	0,  // 7: xray.app.policy.Policy.Timeout.handshake:type_name -> xray.app.policy.Second
+	0,  // 8: xray.app.policy.Policy.Timeout.connection_idle:type_name -> xray.app.policy.Second
+	0,  // 9: xray.app.policy.Policy.Timeout.uplink_only:type_name -> xray.app.policy.Second
+	0,  // 10: xray.app.policy.Policy.Timeout.downlink_only:type_name -> xray.app.policy.Second
+	1,  // 11: xray.app.policy.Config.LevelEntry.value:type_name -> xray.app.policy.Policy
+	12, // [12:12] is the sub-list for method output_type
+	12, // [12:12] is the sub-list for method input_type
+	12, // [12:12] is the sub-list for extension type_name
+	12, // [12:12] is the sub-list for extension extendee
+	0,  // [0:12] is the sub-list for field type_name
 }
 
 func init() { file_app_policy_config_proto_init() }
@@ -691,6 +755,18 @@ func file_app_policy_config_proto_init() {
 			}
 		}
 		file_app_policy_config_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Policy_Restriction); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_policy_config_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SystemPolicy_Stats); i {
 			case 0:
 				return &v.state
@@ -709,7 +785,7 @@ func file_app_policy_config_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_policy_config_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   9,
+			NumMessages:   10,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

app/policy/config.proto

@@ -29,9 +29,14 @@ message Policy {
     int32 connection = 1;
   }
 
+  message Restriction {
+    int32 maxIPs = 1;
+  }
+
   Timeout timeout = 1;
   Stats stats = 2;
   Buffer buffer = 3;
+  Restriction restriction = 4;
 }
 
 message SystemPolicy {

app/proxyman/inbound/worker.go

@@ -18,6 +18,7 @@ import (
 	"github.com/xtls/xray-core/features/stats"
 	"github.com/xtls/xray-core/proxy"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/restriction"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tcp"
 	"github.com/xtls/xray-core/transport/internet/udp"
@@ -32,6 +33,8 @@ type worker interface {
 }
 
 type tcpWorker struct {
+	sync.Mutex
+
 	address         net.Address
 	port            net.Port
 	proxy           proxy.Inbound
@@ -42,6 +45,7 @@ type tcpWorker struct {
 	sniffingConfig  *proxyman.SniffingConfig
 	uplinkCounter   stats.Counter
 	downlinkCounter stats.Counter
+	ipLimitPool     map[session.ID]*restriction.UserMaxIp
 
 	hub internet.Listener
 
@@ -104,9 +108,22 @@ func (w *tcpWorker) callback(conn stat.Connection) {
 	}
 	ctx = session.ContextWithContent(ctx, content)
 
-	if err := w.proxy.Process(ctx, net.Network_TCP, conn, w.dispatcher); err != nil {
+	// Add this IP address to the pool for futher IP limit check
+	w.Lock()
+	w.ipLimitPool[sid] = &restriction.UserMaxIp{
+		IpAddress: net.IP(conn.RemoteAddr().Network()),
+	}
+	w.Unlock()
+
+	if err := w.proxy.Process(ctx, net.Network_TCP, conn, w.dispatcher, &w.ipLimitPool, w.ipLimitPool[sid]); err != nil {
 		newError("connection ends").Base(err).WriteToLog(session.ExportIDToError(ctx))
 	}
+
+	// Deletes the IP address from the pool after the connection ends
+	w.Lock()
+	delete(w.ipLimitPool, sid)
+	w.Unlock()
+
 	cancel()
 	conn.Close()
 }
@@ -116,6 +133,9 @@ func (w *tcpWorker) Proxy() proxy.Inbound {
 }
 
 func (w *tcpWorker) Start() error {
+	if len(w.ipLimitPool) == 0 {
+		w.ipLimitPool = make(map[session.ID]*restriction.UserMaxIp)
+	}
 	ctx := context.Background()
 	hub, err := internet.ListenTCP(ctx, w.address, w.port, w.stream, func(conn stat.Connection) {
 		go w.callback(conn)
@@ -244,6 +264,7 @@ type udpWorker struct {
 	sniffingConfig  *proxyman.SniffingConfig
 	uplinkCounter   stats.Counter
 	downlinkCounter stats.Counter
+	ipLimitPool     map[session.ID]*restriction.UserMaxIp
 
 	checker    *task.Periodic
 	activeConn map[connID]*udpConn
@@ -326,9 +347,23 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 				content.SniffingRequest.RouteOnly = w.sniffingConfig.RouteOnly
 			}
 			ctx = session.ContextWithContent(ctx, content)
-			if err := w.proxy.Process(ctx, net.Network_UDP, conn, w.dispatcher); err != nil {
+
+			// Add this IP address to the pool for futher IP limit check
+			w.Lock()
+			w.ipLimitPool[sid] = &restriction.UserMaxIp{
+				IpAddress: net.IP(conn.RemoteAddr().Network()),
+			}
+			w.Unlock()
+
+			if err := w.proxy.Process(ctx, net.Network_UDP, conn, w.dispatcher, &w.ipLimitPool, w.ipLimitPool[sid]); err != nil {
 				newError("connection ends").Base(err).WriteToLog(session.ExportIDToError(ctx))
 			}
+
+			// Deletes the IP address from the pool after the connection ends
+			w.Lock()
+			delete(w.ipLimitPool, sid)
+			w.Unlock()
+
 			conn.Close()
 			// conn not removed by checker TODO may be lock worker here is better
 			if !conn.inactive {
@@ -379,6 +414,9 @@ func (w *udpWorker) clean() error {
 }
 
 func (w *udpWorker) Start() error {
+	if len(w.ipLimitPool) == 0 {
+		w.ipLimitPool = make(map[session.ID]*restriction.UserMaxIp)
+	}
 	w.activeConn = make(map[connID]*udpConn, 16)
 	ctx := context.Background()
 	h, err := udp.ListenUDP(ctx, w.address, w.port, w.stream, udp.HubCapacity(256))
@@ -478,7 +516,7 @@ func (w *dsWorker) callback(conn stat.Connection) {
 	}
 	ctx = session.ContextWithContent(ctx, content)
 
-	if err := w.proxy.Process(ctx, net.Network_UNIX, conn, w.dispatcher); err != nil {
+	if err := w.proxy.Process(ctx, net.Network_UNIX, conn, w.dispatcher, nil, nil); err != nil {
 		newError("connection ends").Base(err).WriteToLog(session.ExportIDToError(ctx))
 	}
 	cancel()

features/policy/policy.go

@@ -35,6 +35,12 @@ type Buffer struct {
 	PerConnection int32
 }
 
+// Buffer contains settings for restriction such as ip restriction.
+type Restriction struct {
+	// Maximum allowed ips, -1 for unlimited
+	MaxIPs int32
+}
+
 // SystemStats contains stat policy settings on system level.
 type SystemStats struct {
 	// Whether or not to enable stat counter for uplink traffic in inbound handlers.
@@ -55,9 +61,10 @@ type System struct {
 
 // Session is session based settings for controlling Xray requests. It contains various settings (or limits) that may differ for different users in the context.
 type Session struct {
-	Timeouts Timeout // Timeout settings
-	Stats    Stats
-	Buffer   Buffer
+	Timeouts    Timeout // Timeout settings
+	Stats       Stats
+	Buffer      Buffer
+	Restriction Restriction
 }
 
 // Manager is a feature that provides Policy for the given user by its id or level.
@@ -109,6 +116,12 @@ func defaultBufferPolicy() Buffer {
 	}
 }
 
+func defaultRestrictionPolicy() Restriction {
+	return Restriction{
+		MaxIPs: -1,
+	}
+}
+
 // SessionDefault returns the Policy when user is not specified.
 func SessionDefault() Session {
 	return Session{
@@ -124,7 +137,8 @@ func SessionDefault() Session {
 			UserUplink:   false,
 			UserDownlink: false,
 		},
-		Buffer: defaultBufferPolicy(),
+		Buffer:      defaultBufferPolicy(),
+		Restriction: defaultRestrictionPolicy(),
 	}
 }
 

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/miekg/dns v1.1.59
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pires/go-proxyproto v0.7.0
-	github.com/quic-go/quic-go v0.42.0
+	github.com/quic-go/quic-go v0.43.0
 	github.com/refraction-networking/utls v1.6.4
 	github.com/sagernet/sing v0.3.8
 	github.com/sagernet/sing-shadowsocks v0.2.6

go.sum

@@ -114,8 +114,8 @@ github.com/prometheus/client_golang v0.8.0/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXP
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/common v0.0.0-20180801064454-c7de2306084e/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/procfs v0.0.0-20180725123919-05ee40e3a273/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
-github.com/quic-go/quic-go v0.42.0 h1:uSfdap0eveIl8KXnipv9K7nlwZ5IqLlYOpJ58u5utpM=
-github.com/quic-go/quic-go v0.42.0/go.mod h1:132kz4kL3F9vxhW3CtQJLDVwcFe5wdWeJXXijhsO57M=
+github.com/quic-go/quic-go v0.43.0 h1:sjtsTKWX0dsHpuMJvLxGqoQdtgJnbAPWY+W+5vjYW/g=
+github.com/quic-go/quic-go v0.43.0/go.mod h1:132kz4kL3F9vxhW3CtQJLDVwcFe5wdWeJXXijhsO57M=
 github.com/refraction-networking/utls v1.6.4 h1:aeynTroaYn7y+mFtqv8D0bQ4bw0y9nJHneGxJ7lvRDM=
 github.com/refraction-networking/utls v1.6.4/go.mod h1:2VL2xfiqgFAZtJKeUTlf+PSYFs3Eu7km0gCtXJ3m8zs=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr8meMVVGxhp+QBTqY91tM8HjEuMjGg=

infra/conf/common.go

@@ -231,8 +231,8 @@ func (list *PortList) UnmarshalJSON(data []byte) error {
 }
 
 type User struct {
-	EmailString string `json:"email"`
-	LevelByte   byte   `json:"level"`
+	EmailString   string `json:"email"`
+	LevelByte     byte   `json:"level"`
 }
 
 func (v *User) Build() *protocol.User {

infra/conf/policy.go

@@ -12,6 +12,7 @@ type Policy struct {
 	StatsUserUplink   bool    `json:"statsUserUplink"`
 	StatsUserDownlink bool    `json:"statsUserDownlink"`
 	BufferSize        *int32  `json:"bufferSize"`
+	MaxIPs            *int32  `json:"maxIPs"`
 }
 
 func (t *Policy) Build() (*policy.Policy, error) {
@@ -47,6 +48,12 @@ func (t *Policy) Build() (*policy.Policy, error) {
 		}
 	}
 
+	if t.MaxIPs != nil {
+		p.Restriction = &policy.Policy_Restriction{
+			MaxIPs: (*t.MaxIPs),
+		}
+	}
+
 	return p, nil
 }
 

proxy/dokodemo/dokodemo.go

@@ -18,6 +18,7 @@ import (
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport/internet/restriction"
 	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
@@ -76,7 +77,7 @@ type hasHandshakeAddressContext interface {
 }
 
 // Process implements proxy.Inbound.
-func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
+func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher, _ *map[session.ID]*restriction.UserMaxIp, _ *restriction.UserMaxIp) error {
 	newError("processing connection from: ", conn.RemoteAddr()).AtDebug().WriteToLog(session.ExportIDToError(ctx))
 	dest := net.Destination{
 		Network: network,

proxy/proxy.go

@@ -28,6 +28,7 @@ import (
 	"github.com/xtls/xray-core/transport"
 	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/reality"
+	"github.com/xtls/xray-core/transport/internet/restriction"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
 )
@@ -62,7 +63,7 @@ type Inbound interface {
 	Network() []net.Network
 
 	// Process processes a connection of given network. If necessary, the Inbound can dispatch the connection to an Outbound.
-	Process(context.Context, net.Network, stat.Connection, routing.Dispatcher) error
+	Process(context.Context, net.Network, stat.Connection, routing.Dispatcher, *map[session.ID]*restriction.UserMaxIp, *restriction.UserMaxIp) error
 }
 
 // An Outbound process outbound connections.

proxy/trojan/server.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/xtls/xray-core/common"
@@ -22,6 +23,7 @@ import (
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport/internet/reality"
+	"github.com/xtls/xray-core/transport/internet/restriction"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
 	"github.com/xtls/xray-core/transport/internet/udp"
@@ -35,6 +37,8 @@ func init() {
 
 // Server is an inbound connection handler that handles messages in trojan protocol.
 type Server struct {
+	sync.Mutex
+
 	policyManager policy.Manager
 	validator     *Validator
 	fallbacks     map[string]map[string]map[string]*Fallback // or nil
@@ -131,7 +135,7 @@ func (s *Server) Network() []net.Network {
 }
 
 // Process implements proxy.Inbound.Process().
-func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher, usrIpRstrct *map[session.ID]*restriction.UserMaxIp, connIp *restriction.UserMaxIp) error {
 	sid := session.ExportIDToError(ctx)
 
 	iConn := conn
@@ -219,6 +223,29 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Con
 	inbound.User = user
 	sessionPolicy = s.policyManager.ForLevel(user.Level)
 
+	if sessionPolicy.Restriction.MaxIPs > 0 {
+		addr := conn.RemoteAddr().(*net.TCPAddr)
+
+		uniqueIps := make(map[string]bool)
+
+		s.Lock()
+		// Iterate through the connections and find unique used IP addresses withing last 30 seconds.
+		for _, conn := range *usrIpRstrct {
+			if conn.User == user.Email && !conn.IpAddress.Equal(addr.IP) && ((time.Now().Unix() - conn.Time) < 30) {
+				uniqueIps[conn.IpAddress.String()] = true
+			}
+		}
+		s.Unlock()
+
+		if len(uniqueIps) >= int(sessionPolicy.Restriction.MaxIPs) {
+			return newError("User ", user, " has exceeded their allowed IPs.").AtWarning()
+		}
+
+		connIp.IpAddress = addr.IP
+		connIp.User = user.Email
+		connIp.Time = time.Now().Unix()
+	}
+
 	if destination.Network == net.Network_UDP { // handle udp request
 		return s.handleUDPPayload(ctx, &PacketReader{Reader: clientReader}, &PacketWriter{Writer: conn}, dispatcher)
 	}

proxy/vless/inbound/inbound.go

@@ -10,6 +10,7 @@ import (
 	"reflect"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 	"unsafe"
 
@@ -32,6 +33,7 @@ import (
 	"github.com/xtls/xray-core/proxy/vless"
 	"github.com/xtls/xray-core/proxy/vless/encoding"
 	"github.com/xtls/xray-core/transport/internet/reality"
+	"github.com/xtls/xray-core/transport/internet/restriction"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
 )
@@ -51,6 +53,8 @@ func init() {
 
 // Handler is an inbound connection handler that handles messages in VLess protocol.
 type Handler struct {
+	sync.Mutex
+
 	inboundHandlerManager feature_inbound.Manager
 	policyManager         policy.Manager
 	validator             *vless.Validator
@@ -176,7 +180,7 @@ func (*Handler) Network() []net.Network {
 }
 
 // Process implements proxy.Inbound.Process().
-func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
+func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher, usrIpRstrct *map[session.ID]*restriction.UserMaxIp, connIp *restriction.UserMaxIp) error {
 	sid := session.ExportIDToError(ctx)
 
 	iConn := connection
@@ -184,6 +188,7 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 		iConn = statConn.Connection
 	}
 
+
 	sessionPolicy := h.policyManager.ForLevel(0)
 	if err := connection.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake)); err != nil {
 		return newError("unable to set read deadline").Base(err).AtWarning()
@@ -444,6 +449,29 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 		// Flow: requestAddons.Flow,
 	}
 
+	if sessionPolicy.Restriction.MaxIPs > 0 {
+		addr := connection.RemoteAddr().(*net.TCPAddr)
+
+		uniqueIps := make(map[string]bool)
+
+		h.Lock()
+		// Iterate through the connections and find unique used IP addresses withing last 30 seconds.
+		for _, conn := range *usrIpRstrct {
+			if conn.User == request.User.Email && !conn.IpAddress.Equal(addr.IP) && ((time.Now().Unix() - conn.Time) < 30) {
+				uniqueIps[conn.IpAddress.String()] = true
+			}
+		}
+		h.Unlock()
+
+		if len(uniqueIps) >= int(sessionPolicy.Restriction.MaxIPs) {
+			return newError("User ", request.User.Email, " has exceeded their allowed IPs.").AtWarning()
+		}
+
+		connIp.IpAddress = addr.IP
+		connIp.User = request.User.Email
+		connIp.Time = time.Now().Unix()
+	}
+
 	var input *bytes.Reader
 	var rawInput *bytes.Buffer
 	switch requestAddons.Flow {

proxy/vmess/inbound/inbound.go

@@ -25,6 +25,7 @@ import (
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/proxy/vmess"
 	"github.com/xtls/xray-core/proxy/vmess/encoding"
+	"github.com/xtls/xray-core/transport/internet/restriction"
 	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
@@ -97,6 +98,8 @@ func (v *userByEmail) Remove(email string) bool {
 
 // Handler is an inbound connection handler that handles messages in VMess protocol.
 type Handler struct {
+	sync.Mutex
+
 	policyManager         policy.Manager
 	inboundHandlerManager feature_inbound.Manager
 	clients               *vmess.TimedUserValidator
@@ -208,7 +211,7 @@ func transferResponse(timer signal.ActivityUpdater, session *encoding.ServerSess
 }
 
 // Process implements proxy.Inbound.Process().
-func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
+func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher, usrIpRstrct *map[session.ID]*restriction.UserMaxIp, connIp *restriction.UserMaxIp) error {
 	sessionPolicy := h.policyManager.ForLevel(0)
 	if err := connection.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake)); err != nil {
 		return newError("unable to set read deadline").Base(err).AtWarning()
@@ -262,6 +265,28 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 
 	sessionPolicy = h.policyManager.ForLevel(request.User.Level)
 
+	if sessionPolicy.Restriction.MaxIPs > 0 {
+		addr := connection.RemoteAddr().(*net.TCPAddr)
+
+		uniqueIps := make(map[string]bool)
+		h.Lock()
+		// Iterate through the connections and find unique used IP addresses withing last 30 seconds.
+		for _, conn := range *usrIpRstrct {
+			if conn.User == request.User.Email && !conn.IpAddress.Equal(addr.IP) && ((time.Now().Unix() - conn.Time) < 30) {
+				uniqueIps[conn.IpAddress.String()] = true
+			}
+		}
+		h.Unlock()
+
+		if len(uniqueIps) >= int(sessionPolicy.Restriction.MaxIPs) {
+			return newError("User ", request.User.Email, " has exceeded their allowed IPs.").AtWarning()
+		}
+
+		connIp.IpAddress = addr.IP
+		connIp.User = request.User.Email
+		connIp.Time = time.Now().Unix()
+	}
+
 	ctx, cancel := context.WithCancel(ctx)
 	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
 

transport/internet/restriction/ip.go

@@ -0,0 +1,11 @@
+package restriction
+
+import (
+	"net"
+)
+
+type UserMaxIp struct {
+	User      string
+	IpAddress net.IP
+	Time      int64
+}