修改操作方式为 坦克式运动

.gitignore

@@ -83,3 +83,6 @@ crashlytics-build.properties
 /.dotnet
 /.dotnet-home
 
+
+EditMode-err.txt
+

Assets/Scenes/SampleScene.unity

@@ -1595,90 +1595,6 @@ MeshFilter:
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-  m_LightProbeUsage: 1
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-  m_Size: {x: 1, y: 1}
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-  m_MaskInteraction: 0
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---- !u!4 &520045884
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 --- !u!1 &632206104
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@@ -3733,7 +3649,7 @@ Transform:
   m_GameObject: {fileID: 1186082399}
   serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalPosition: {x: 0, y: 0, z: -30}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children:
@@ -6194,4 +6110,3 @@ SceneRoots:
   - {fileID: 1298430417}
   - {fileID: 789249236}
   - {fileID: 679132025}
-  - {fileID: 520045884}

Assets/Scripts/ClientAuthoritativePlayerState.cs

@@ -118,7 +118,18 @@ public sealed class ClientAuthoritativePlayerStateSnapshot
 
     public int Hp { get; }
 
-    public Quaternion RotationQuaternion => Quaternion.Euler(0f, Rotation, 0f);
+    public Quaternion RotationQuaternion => Quaternion.Euler(0f, NormalizeDegrees(90f - Rotation), 0f);
+
+    private static float NormalizeDegrees(float degrees)
+    {
+        var normalized = degrees % 360f;
+        if (normalized < 0f)
+        {
+            normalized += 360f;
+        }
+
+        return normalized;
+    }
 }
 
 public sealed class ClientCombatPresentationSnapshot

Assets/Scripts/MovementComponent.cs

@@ -23,8 +23,8 @@ public static class ClientGameplayInputFlow
         {
             PlayerId = playerId,
             Tick = tick,
-            MoveX = input.x,
+            TurnInput = -input.x,
-            MoveY = input.z
+            ThrottleInput = input.z
         };
         return true;
     }
@@ -104,6 +104,8 @@ public class MovementComponent : MonoBehaviour
 {
     [SerializeField] private float _sendInterval = 0.05f;
     private Player _master;
+    private const float TurnSpeedDegreesPerSecond = 180f;
+    private const float UnityYawOffsetDegrees = 90f;
     private int _speed = 2;
     [SerializeField] private Rigidbody _rigid;
     private float _lastSendTime = 0;
@@ -131,9 +133,10 @@ public class MovementComponent : MonoBehaviour
         _isControlled = isControlled;
         _speed = speed;
         _startTickOffset = serverTick;
-        _rigid.interpolation = RigidbodyInterpolation.Interpolate;
+        _rigid.interpolation = isControlled ? RigidbodyInterpolation.None : RigidbodyInterpolation.Interpolate;
         _rigid.isKinematic = !isControlled;
         _rigid.velocity = Vector3.zero;
+        _rigid.angularVelocity = Vector3.zero;
         if (serverTick != 0 && _isControlled && MainUI.Instance != null) MainUI.Instance.OnStartTickOffsetChanged(serverTick);
     }
 
@@ -145,7 +148,6 @@ public class MovementComponent : MonoBehaviour
             var hasMovement = ClientGameplayInputFlow.HasPlanarInput(_cachedMoveInput);
             if (hasMovement)
             {
-                _lastAimDirection = _cachedMoveInput;
                 _stopMessagePending = false;
             }
             else if (_wasMovingLastFrame)
@@ -215,9 +217,10 @@ public class MovementComponent : MonoBehaviour
         }
 
         _serverPosition = snapshot.Position;
-        _rigid.position = Vector3.Lerp(_rigid.position, _serverPosition, _lerpRate);
+        _rigid.position = _serverPosition;
-        _rigid.rotation = Quaternion.Slerp(_rigid.rotation, snapshot.RotationQuaternion, _lerpRate);
+        _rigid.rotation = snapshot.RotationQuaternion;
         _rigid.velocity = snapshot.Velocity;
+        _rigid.angularVelocity = Vector3.zero;
         ReplayPendingInputs(replayInputs);
     }
 
@@ -240,19 +243,19 @@ public class MovementComponent : MonoBehaviour
 
     private Vector3 ResolveAimDirection()
     {
-        if (ClientGameplayInputFlow.HasPlanarInput(_lastAimDirection))
+        var planarForward = Vector3.ProjectOnPlane(_rigid.transform.forward, Vector3.up);
+        if (ClientGameplayInputFlow.HasPlanarInput(planarForward))
         {
-            return _lastAimDirection;
+            _lastAimDirection = planarForward;
+            return planarForward;
         }
 
-        var forward = _master != null ? _master.transform.forward : transform.forward;
+        return ClientGameplayInputFlow.HasPlanarInput(_lastAimDirection) ? _lastAimDirection : ResolveHeadingForward(UnityYawToHeading(_rigid.rotation.eulerAngles.y));
-        var planarForward = new Vector3(forward.x, 0f, forward.z);
-        return ClientGameplayInputFlow.HasPlanarInput(planarForward) ? planarForward : Vector3.forward;
     }
 
     private void Simulate(Vector3 input)
     {
-        _rigid.velocity = _speed * input;
+        ApplyTankMovement(-input.x, input.z, Time.fixedDeltaTime);
         if (_isControlled)
         {
             if (MainUI.Instance != null)
@@ -301,7 +304,7 @@ public class MovementComponent : MonoBehaviour
     {
         foreach (var replayInput in replayInputs)
         {
-            _rigid.position += _speed * new Vector3(replayInput.MoveX, 0f, replayInput.MoveY) * _sendInterval;
+            ApplyTankMovement(replayInput.TurnInput, replayInput.ThrottleInput, _sendInterval);
         }
 
         if (_isControlled)
@@ -312,4 +315,50 @@ public class MovementComponent : MonoBehaviour
             }
         }
     }
+
+    private void ApplyTankMovement(float turnInput, float throttleInput, float deltaTime)
+    {
+        if (deltaTime <= 0f)
+        {
+            _rigid.velocity = Vector3.zero;
+            return;
+        }
+
+        var clampedTurnInput = Mathf.Clamp(turnInput, -1f, 1f);
+        var clampedThrottleInput = Mathf.Clamp(throttleInput, -1f, 1f);
+        var heading = NormalizeDegrees(UnityYawToHeading(_rigid.rotation.eulerAngles.y) + (clampedTurnInput * TurnSpeedDegreesPerSecond * deltaTime));
+        _rigid.rotation = Quaternion.Euler(0f, HeadingToUnityYaw(heading), 0f);
+
+        var forward = ResolveHeadingForward(heading);
+        var velocity = forward * (clampedThrottleInput * _speed);
+        _rigid.velocity = velocity;
+        _rigid.position += velocity * deltaTime;
+    }
+
+    private static Vector3 ResolveHeadingForward(float headingDegrees)
+    {
+        var rotationRadians = headingDegrees * Mathf.Deg2Rad;
+        return new Vector3(Mathf.Cos(rotationRadians), 0f, Mathf.Sin(rotationRadians));
+    }
+
+    private static float HeadingToUnityYaw(float headingDegrees)
+    {
+        return NormalizeDegrees(UnityYawOffsetDegrees - headingDegrees);
+    }
+
+    private static float UnityYawToHeading(float unityYawDegrees)
+    {
+        return NormalizeDegrees(UnityYawOffsetDegrees - unityYawDegrees);
+    }
+
+    private static float NormalizeDegrees(float degrees)
+    {
+        var normalized = degrees % 360f;
+        if (normalized < 0f)
+        {
+            normalized += 360f;
+        }
+
+        return normalized;
+    }
 }

Assets/Scripts/Network/Defines/Message.cs

@@ -60,7 +60,7 @@ namespace Network.Defines {
             new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.LoginResponse), global::Network.Defines.LoginResponse.Parser, new[]{ "PlayerId", "Positions", "Speed", "ServerTick", "Result" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.PlayerJoin), global::Network.Defines.PlayerJoin.Parser, new[]{ "PlayerId", "Position" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.LogoutRequest), global::Network.Defines.LogoutRequest.Parser, new[]{ "PlayerId" }, null, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.MoveInput), global::Network.Defines.MoveInput.Parser, new[]{ "PlayerId", "Tick", "MoveX", "MoveY" }, null, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.MoveInput), global::Network.Defines.MoveInput.Parser, new[]{ "PlayerId", "Tick", "TurnInput", "ThrottleInput" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.ShootInput), global::Network.Defines.ShootInput.Parser, new[]{ "PlayerId", "Tick", "DirX", "DirY", "TargetId" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.CombatEvent), global::Network.Defines.CombatEvent.Parser, new[]{ "Tick", "EventType", "AttackerId", "TargetId", "Damage", "HitPosition" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Network.Defines.PlayerState), global::Network.Defines.PlayerState.Parser, new[]{ "PlayerId", "Position", "Velocity", "Rotation", "Tick", "Hp" }, null, null, null, null),
@@ -1628,8 +1628,8 @@ namespace Network.Defines {
     public MoveInput(MoveInput other) : this() {
       playerId_ = other.playerId_;
       tick_ = other.tick_;
-      moveX_ = other.moveX_;
+      turnInput_ = other.turnInput_;
-      moveY_ = other.moveY_;
+      throttleInput_ = other.throttleInput_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
@@ -1663,27 +1663,27 @@ namespace Network.Defines {
       }
     }
 
-    /// <summary>Field number for the "move_x" field.</summary>
+    /// <summary>Field number for the "turn_input" field.</summary>
-    public const int MoveXFieldNumber = 3;
+    public const int TurnInputFieldNumber = 3;
-    private float moveX_;
+    private float turnInput_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
-    public float MoveX {
+    public float TurnInput {
-      get { return moveX_; }
+      get { return turnInput_; }
       set {
-        moveX_ = value;
+        turnInput_ = value;
       }
     }
 
-    /// <summary>Field number for the "move_y" field.</summary>
+    /// <summary>Field number for the "throttle_input" field.</summary>
-    public const int MoveYFieldNumber = 4;
+    public const int ThrottleInputFieldNumber = 4;
-    private float moveY_;
+    private float throttleInput_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
-    public float MoveY {
+    public float ThrottleInput {
-      get { return moveY_; }
+      get { return throttleInput_; }
       set {
-        moveY_ = value;
+        throttleInput_ = value;
       }
     }
 
@@ -1704,8 +1704,8 @@ namespace Network.Defines {
       }
       if (PlayerId != other.PlayerId) return false;
       if (Tick != other.Tick) return false;
-      if (!pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.Equals(MoveX, other.MoveX)) return false;
+      if (!pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.Equals(TurnInput, other.TurnInput)) return false;
-      if (!pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.Equals(MoveY, other.MoveY)) return false;
+      if (!pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.Equals(ThrottleInput, other.ThrottleInput)) return false;
       return Equals(_unknownFields, other._unknownFields);
     }
 
@@ -1715,8 +1715,8 @@ namespace Network.Defines {
       int hash = 1;
       if (PlayerId.Length != 0) hash ^= PlayerId.GetHashCode();
       if (Tick != 0L) hash ^= Tick.GetHashCode();
-      if (MoveX != 0F) hash ^= pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.GetHashCode(MoveX);
+      if (TurnInput != 0F) hash ^= pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.GetHashCode(TurnInput);
-      if (MoveY != 0F) hash ^= pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.GetHashCode(MoveY);
+      if (ThrottleInput != 0F) hash ^= pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.GetHashCode(ThrottleInput);
       if (_unknownFields != null) {
         hash ^= _unknownFields.GetHashCode();
       }
@@ -1743,13 +1743,13 @@ namespace Network.Defines {
         output.WriteRawTag(16);
         output.WriteInt64(Tick);
       }
-      if (MoveX != 0F) {
+      if (TurnInput != 0F) {
         output.WriteRawTag(29);
-        output.WriteFloat(MoveX);
+        output.WriteFloat(TurnInput);
       }
-      if (MoveY != 0F) {
+      if (ThrottleInput != 0F) {
         output.WriteRawTag(37);
-        output.WriteFloat(MoveY);
+        output.WriteFloat(ThrottleInput);
       }
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
@@ -1769,13 +1769,13 @@ namespace Network.Defines {
         output.WriteRawTag(16);
         output.WriteInt64(Tick);
       }
-      if (MoveX != 0F) {
+      if (TurnInput != 0F) {
         output.WriteRawTag(29);
-        output.WriteFloat(MoveX);
+        output.WriteFloat(TurnInput);
       }
-      if (MoveY != 0F) {
+      if (ThrottleInput != 0F) {
         output.WriteRawTag(37);
-        output.WriteFloat(MoveY);
+        output.WriteFloat(ThrottleInput);
       }
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1793,10 +1793,10 @@ namespace Network.Defines {
       if (Tick != 0L) {
         size += 1 + pb::CodedOutputStream.ComputeInt64Size(Tick);
       }
-      if (MoveX != 0F) {
+      if (TurnInput != 0F) {
         size += 1 + 4;
       }
-      if (MoveY != 0F) {
+      if (ThrottleInput != 0F) {
         size += 1 + 4;
       }
       if (_unknownFields != null) {
@@ -1817,11 +1817,11 @@ namespace Network.Defines {
       if (other.Tick != 0L) {
         Tick = other.Tick;
       }
-      if (other.MoveX != 0F) {
+      if (other.TurnInput != 0F) {
-        MoveX = other.MoveX;
+        TurnInput = other.TurnInput;
       }
-      if (other.MoveY != 0F) {
+      if (other.ThrottleInput != 0F) {
-        MoveY = other.MoveY;
+        ThrottleInput = other.ThrottleInput;
       }
       _unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
     }
@@ -1851,11 +1851,11 @@ namespace Network.Defines {
             break;
           }
           case 29: {
-            MoveX = input.ReadFloat();
+            TurnInput = input.ReadFloat();
             break;
           }
           case 37: {
-            MoveY = input.ReadFloat();
+            ThrottleInput = input.ReadFloat();
             break;
           }
         }
@@ -1886,11 +1886,11 @@ namespace Network.Defines {
             break;
           }
           case 29: {
-            MoveX = input.ReadFloat();
+            TurnInput = input.ReadFloat();
             break;
           }
           case 37: {
-            MoveY = input.ReadFloat();
+            ThrottleInput = input.ReadFloat();
             break;
           }
         }

Assets/Scripts/Network/Defines/MessageType.cs

@@ -4,34 +4,18 @@ namespace Network.Defines
     {
         Unknow = 0,
 
-        // Gameplay
+        // Canonical dedicated-server MVP runtime vocabulary.
         MoveInput = 1,
         PlayerState = 2,
         ShootInput = 3,
         CombatEvent = 4,
         PlayerJoin = 5,
-        PlayerLeave = 6,
-        PlayerAction = 7,
-        GameState = 8,
 
-        // Chat
-        ChatMessage = 10,
-        PrivateMessage = 11,
-        SystemMessage = 12,
-
-        // Session
-        HeartBeat = 20,
         LoginRequest = 21,
         LoginResponse = 22,
         LogoutRequest = 23,
 
-        // Room management
-        CreateRoom = 30,
-        JoinRoom = 31,
-        LeaveRoom = 32,
-        RoomList = 33,
-
         Heartbeat = 40,
         HeartbeatResponse = 41,
     }
-}
+}

Assets/Scripts/Network/Defines/message.proto

@@ -39,8 +39,8 @@ message LogoutRequest {
 message MoveInput {
   string player_id = 1;
   int64 tick = 2;
-  float move_x = 3;
+  float turn_input = 3;
-  float move_y = 4;
+  float throttle_input = 4;
 }
 
 message ShootInput {

Assets/Scripts/Network/NetworkApplication/MainThreadNetworkDispatcher.cs.meta

@@ -1,4 +1,4 @@
-fileFormatVersion: 2
+fileFormatVersion: 2
 guid: 3dc7b1ecbad541ea86a9d700dd5148e0
 MonoImporter:
   externalObjects: {}

Assets/Scripts/Network/NetworkApplication/MultiSessionManager.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
@@ -87,9 +87,10 @@ namespace Network.NetworkApplication
             if (sessionManager.State == ConnectionState.Disconnected)
             {
                 sessionManager.NotifyTransportConnected();
+                return;
             }
 
-            sessionManager.NotifyInboundActivity();
+            sessionManager.NotifyTransportActivity();
         }
 
         public void NotifyTransportConnected(IPEndPoint remoteEndPoint)

Assets/Scripts/Network/NetworkApplication/NetworkIntegrationFactory.cs

@@ -60,7 +60,8 @@ namespace Network.NetworkApplication
             SyncSequenceTracker syncSequenceTracker = null,
             Func<int, ITransport> transportFactory = null,
             ServerAuthoritativeMovementConfiguration authoritativeMovement = null,
-            ServerAuthoritativeCombatConfiguration authoritativeCombat = null)
+            ServerAuthoritativeCombatConfiguration authoritativeCombat = null,
+            IAuthoritativeMovementWorldValidator authoritativeMovementWorldValidator = null)
         {
             ValidateDualPortConfiguration(reliablePort, syncPort);
 
@@ -86,7 +87,8 @@ namespace Network.NetworkApplication
                 deliveryPolicyResolver,
                 syncSequenceTracker,
                 authoritativeMovement,
-                authoritativeCombat);
+                authoritativeCombat,
+                authoritativeMovementWorldValidator ?? PermissiveAuthoritativeMovementWorldValidator.Instance);
         }
 
         public static Task<ServerRuntimeHandle> StartServerRuntimeAsync(ServerRuntimeConfiguration configuration)

Assets/Scripts/Network/NetworkApplication/SessionManager.cs

@@ -1,11 +1,12 @@
-using System;
+using System;
 
 namespace Network.NetworkApplication
 {
     public sealed class SessionManager
     {
         private readonly Func<DateTimeOffset> utcNowProvider;
-        private DateTimeOffset? lastLivenessUtc;
+        private DateTimeOffset? lastAcceptedLivenessUtc;
+        private DateTimeOffset? lastTransportActivityUtc;
         private DateTimeOffset? lastHeartbeatSentUtc;
         private DateTimeOffset? nextReconnectAtUtc;
 
@@ -24,7 +25,9 @@ namespace Network.NetworkApplication
 
         public SessionReconnectPolicy ReconnectPolicy { get; }
 
-        public DateTimeOffset? LastLivenessUtc => lastLivenessUtc;
+        public DateTimeOffset? LastLivenessUtc => lastAcceptedLivenessUtc;
+
+        public DateTimeOffset? LastTransportActivityUtc => lastTransportActivityUtc;
 
         public DateTimeOffset? LastHeartbeatSentUtc => lastHeartbeatSentUtc;
 
@@ -70,13 +73,18 @@ namespace Network.NetworkApplication
         public void NotifyTransportConnected()
         {
             var now = utcNowProvider();
-            lastLivenessUtc = now;
+            lastTransportActivityUtc = now;
             lastHeartbeatSentUtc = null;
             nextReconnectAtUtc = null;
             LastFailureReason = null;
             TransitionTo(ConnectionState.TransportConnected, SessionEventKind.TransportConnected, now);
         }
 
+        public void NotifyTransportActivity()
+        {
+            lastTransportActivityUtc = utcNowProvider();
+        }
+
         public void NotifyLoginStarted()
         {
             TransitionTo(ConnectionState.LoginPending, SessionEventKind.LoginStarted, utcNowProvider());
@@ -85,7 +93,8 @@ namespace Network.NetworkApplication
         public void NotifyLoginSucceeded()
         {
             var now = utcNowProvider();
-            lastLivenessUtc = now;
+            lastTransportActivityUtc = now;
+            lastAcceptedLivenessUtc = now;
             LastFailureReason = null;
             TransitionTo(ConnectionState.LoggedIn, SessionEventKind.LoginSucceeded, now);
         }
@@ -105,7 +114,8 @@ namespace Network.NetworkApplication
         public void NotifyHeartbeatReceived()
         {
             var now = utcNowProvider();
-            lastLivenessUtc = now;
+            lastTransportActivityUtc = now;
+            lastAcceptedLivenessUtc = now;
             if (lastHeartbeatSentUtc.HasValue)
             {
                 LastRoundTripTime = now - lastHeartbeatSentUtc.Value;
@@ -116,7 +126,9 @@ namespace Network.NetworkApplication
 
         public void NotifyInboundActivity()
         {
-            lastLivenessUtc = utcNowProvider();
+            var now = utcNowProvider();
+            lastTransportActivityUtc = now;
+            lastAcceptedLivenessUtc = now;
         }
 
         public void NotifyTransportDisconnected(string reason = null)
@@ -152,17 +164,18 @@ namespace Network.NetworkApplication
 
         private bool ShouldTimeout(DateTimeOffset now)
         {
-            if (State != ConnectionState.TransportConnected && State != ConnectionState.LoginPending && State != ConnectionState.LoggedIn)
+            switch (State)
             {
-                return false;
+                case ConnectionState.TransportConnected:
+                case ConnectionState.LoginPending:
+                    return lastTransportActivityUtc.HasValue &&
+                        now - lastTransportActivityUtc.Value >= ReconnectPolicy.HeartbeatTimeout;
+                case ConnectionState.LoggedIn:
+                    return lastAcceptedLivenessUtc.HasValue &&
+                        now - lastAcceptedLivenessUtc.Value >= ReconnectPolicy.HeartbeatTimeout;
+                default:
+                    return false;
             }
-
-            if (!lastLivenessUtc.HasValue)
-            {
-                return false;
-            }
-
-            return now - lastLivenessUtc.Value >= ReconnectPolicy.HeartbeatTimeout;
         }
 
         private void TransitionTo(

Assets/Scripts/Network/NetworkHost/AuthoritativeMovementWorldValidationRequest.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Net;
+
+namespace Network.NetworkHost
+{
+    public sealed class AuthoritativeMovementWorldValidationRequest
+    {
+        public AuthoritativeMovementWorldValidationRequest(
+            IPEndPoint remoteEndPoint,
+            string playerId,
+            float currentPositionX,
+            float currentPositionY,
+            float currentPositionZ,
+            float candidatePositionX,
+            float candidatePositionY,
+            float candidatePositionZ,
+            float velocityX,
+            float velocityY,
+            float velocityZ)
+        {
+            RemoteEndPoint = remoteEndPoint ?? throw new ArgumentNullException(nameof(remoteEndPoint));
+            PlayerId = playerId ?? throw new ArgumentNullException(nameof(playerId));
+            CurrentPositionX = currentPositionX;
+            CurrentPositionY = currentPositionY;
+            CurrentPositionZ = currentPositionZ;
+            CandidatePositionX = candidatePositionX;
+            CandidatePositionY = candidatePositionY;
+            CandidatePositionZ = candidatePositionZ;
+            VelocityX = velocityX;
+            VelocityY = velocityY;
+            VelocityZ = velocityZ;
+        }
+
+        public IPEndPoint RemoteEndPoint { get; }
+
+        public string PlayerId { get; }
+
+        public float CurrentPositionX { get; }
+
+        public float CurrentPositionY { get; }
+
+        public float CurrentPositionZ { get; }
+
+        public float CandidatePositionX { get; }
+
+        public float CandidatePositionY { get; }
+
+        public float CandidatePositionZ { get; }
+
+        public float VelocityX { get; }
+
+        public float VelocityY { get; }
+
+        public float VelocityZ { get; }
+    }
+}

Assets/Scripts/Network/NetworkHost/AuthoritativeMovementWorldValidationRequest.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 44fc9b6a7ea518c419516af9014d6a46
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkHost/AuthoritativeMovementWorldValidationResult.cs

@@ -0,0 +1,22 @@
+namespace Network.NetworkHost
+{
+    public readonly struct AuthoritativeMovementWorldValidationResult
+    {
+        private AuthoritativeMovementWorldValidationResult(bool isAllowed)
+        {
+            IsAllowed = isAllowed;
+        }
+
+        public bool IsAllowed { get; }
+
+        public static AuthoritativeMovementWorldValidationResult Allow()
+        {
+            return new AuthoritativeMovementWorldValidationResult(true);
+        }
+
+        public static AuthoritativeMovementWorldValidationResult Reject()
+        {
+            return new AuthoritativeMovementWorldValidationResult(false);
+        }
+    }
+}

Assets/Scripts/Network/NetworkHost/AuthoritativeMovementWorldValidationResult.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 4838ecf8df980f8498d225a15ab84df3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkHost/IAuthoritativeMovementWorldValidator.cs

@@ -0,0 +1,7 @@
+namespace Network.NetworkHost
+{
+    public interface IAuthoritativeMovementWorldValidator
+    {
+        AuthoritativeMovementWorldValidationResult Validate(AuthoritativeMovementWorldValidationRequest request);
+    }
+}

Assets/Scripts/Network/NetworkHost/IAuthoritativeMovementWorldValidator.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b6ae924c07d515d44b00298c08c121b2
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkHost/PermissiveAuthoritativeMovementWorldValidator.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace Network.NetworkHost
+{
+    public sealed class PermissiveAuthoritativeMovementWorldValidator : IAuthoritativeMovementWorldValidator
+    {
+        private PermissiveAuthoritativeMovementWorldValidator()
+        {
+        }
+
+        public static PermissiveAuthoritativeMovementWorldValidator Instance { get; } = new PermissiveAuthoritativeMovementWorldValidator();
+
+        public AuthoritativeMovementWorldValidationResult Validate(AuthoritativeMovementWorldValidationRequest request)
+        {
+            if (request == null)
+            {
+                throw new ArgumentNullException(nameof(request));
+            }
+
+            return AuthoritativeMovementWorldValidationResult.Allow();
+        }
+    }
+}

Assets/Scripts/Network/NetworkHost/PermissiveAuthoritativeMovementWorldValidator.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 251269ca4373a134b955c8a2a5786f95
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkHost/ServerAuthoritativeCombatCoordinator.cs

@@ -11,16 +11,19 @@ namespace Network.NetworkHost
     internal sealed class ServerAuthoritativeCombatCoordinator
     {
         private readonly object gate = new();
+        private readonly ServerNetworkHost host;
         private readonly MessageManager messageManager;
         private readonly ServerAuthoritativeMovementCoordinator movementCoordinator;
         private readonly Dictionary<string, ServerAuthoritativeCombatState> statesByPeer = new();
         private readonly ServerAuthoritativeCombatConfiguration configuration;
 
         public ServerAuthoritativeCombatCoordinator(
+            ServerNetworkHost host,
             MessageManager messageManager,
             ServerAuthoritativeMovementCoordinator movementCoordinator,
             ServerAuthoritativeCombatConfiguration configuration)
         {
+            this.host = host ?? throw new ArgumentNullException(nameof(host));
             this.messageManager = messageManager ?? throw new ArgumentNullException(nameof(messageManager));
             this.movementCoordinator = movementCoordinator ?? throw new ArgumentNullException(nameof(movementCoordinator));
             this.configuration = configuration ?? throw new ArgumentNullException(nameof(configuration));
@@ -56,13 +59,13 @@ namespace Network.NetworkHost
                 return Task.CompletedTask;
             }
 
-            if (!TryValidateAcceptedShot(input, sender, out var attackerState, out var targetState))
+            if (!TryValidateAcceptedShot(input, sender, out var acceptedPeer, out var attackerState, out var targetState))
             {
                 BroadcastRejectedShot(input);
                 return Task.CompletedTask;
             }
 
-            movementCoordinator.TryUpdateState(sender, state =>
+            movementCoordinator.TryUpdateState(acceptedPeer, state =>
             {
                 state.LastAcceptedShootTick = input.Tick;
             }, out attackerState);
@@ -85,6 +88,7 @@ namespace Network.NetworkHost
                 Z = targetState.PositionZ
             };
 
+            // Keep the coordinator as the only gameplay-relevant authoritative combat-result emitter.
             messageManager.BroadcastMessage(new CombatEvent
             {
                 Tick = input.Tick,
@@ -157,16 +161,19 @@ namespace Network.NetworkHost
         private bool TryValidateAcceptedShot(
             ShootInput input,
             IPEndPoint sender,
+            out IPEndPoint acceptedPeer,
             out ServerAuthoritativeMovementState attackerState,
             out ServerAuthoritativeMovementState targetState)
         {
+            acceptedPeer = null;
             attackerState = null;
             targetState = null;
 
             if (input == null ||
                 string.IsNullOrWhiteSpace(input.PlayerId) ||
                 !IsFinite(input.DirX) ||
-                !IsFinite(input.DirY))
+                !IsFinite(input.DirY) ||
+                !host.TryResolveAcceptedPeer(sender, input.PlayerId, out acceptedPeer))
             {
                 return false;
             }
@@ -177,8 +184,8 @@ namespace Network.NetworkHost
                 return false;
             }
 
-            if (!movementCoordinator.TryGetState(sender, out attackerState) &&
+            if (!movementCoordinator.TryGetState(acceptedPeer, out attackerState) &&
-                !movementCoordinator.EnsureState(sender, input.PlayerId, out attackerState))
+                !movementCoordinator.EnsureState(acceptedPeer, input.PlayerId, out attackerState))
             {
                 return false;
             }
@@ -191,7 +198,12 @@ namespace Network.NetworkHost
                 return false;
             }
 
-            return TryResolveTargetState(input, attackerState, out targetState);
+            if (!TryResolveTargetState(input, attackerState, out targetState))
+            {
+                return false;
+            }
+
+            return host.TryRefreshAcceptedGameplayActivity(sender, input.PlayerId);
         }
 
         private bool TryResolveTargetState(

Assets/Scripts/Network/NetworkHost/ServerAuthoritativeMovementConfiguration.cs

@@ -6,6 +6,8 @@ namespace Network.NetworkHost
     {
         public float MoveSpeed { get; set; } = 5f;
 
+        public float TurnSpeedDegreesPerSecond { get; set; } = 180f;
+
         public TimeSpan BroadcastInterval { get; set; } = TimeSpan.FromMilliseconds(50);
 
         public int DefaultHp { get; set; } = 100;
@@ -17,6 +19,11 @@ namespace Network.NetworkHost
                 throw new ArgumentOutOfRangeException(nameof(MoveSpeed), "Move speed must be finite and non-negative.");
             }
 
+            if (float.IsNaN(TurnSpeedDegreesPerSecond) || float.IsInfinity(TurnSpeedDegreesPerSecond) || TurnSpeedDegreesPerSecond < 0f)
+            {
+                throw new ArgumentOutOfRangeException(nameof(TurnSpeedDegreesPerSecond), "Turn speed must be finite and non-negative.");
+            }
+
             if (BroadcastInterval <= TimeSpan.Zero)
             {
                 throw new ArgumentOutOfRangeException(nameof(BroadcastInterval), "Broadcast interval must be positive.");

Assets/Scripts/Network/NetworkHost/ServerAuthoritativeMovementCoordinator.cs

@@ -14,6 +14,7 @@ namespace Network.NetworkHost
         private readonly MessageManager messageManager;
         private readonly ServerNetworkHost host;
         private readonly ServerAuthoritativeMovementConfiguration configuration;
+        private readonly IAuthoritativeMovementWorldValidator worldValidator;
         private readonly Dictionary<string, ServerAuthoritativeMovementState> statesByPeer = new();
         private long nextBroadcastTick = 1;
         private TimeSpan accumulatedBroadcastTime;
@@ -21,11 +22,13 @@ namespace Network.NetworkHost
         public ServerAuthoritativeMovementCoordinator(
             ServerNetworkHost host,
             MessageManager messageManager,
-            ServerAuthoritativeMovementConfiguration configuration)
+            ServerAuthoritativeMovementConfiguration configuration,
+            IAuthoritativeMovementWorldValidator worldValidator)
         {
             this.host = host ?? throw new ArgumentNullException(nameof(host));
             this.messageManager = messageManager ?? throw new ArgumentNullException(nameof(messageManager));
             this.configuration = configuration ?? throw new ArgumentNullException(nameof(configuration));
+            this.worldValidator = worldValidator ?? throw new ArgumentNullException(nameof(worldValidator));
         }
 
         public IReadOnlyList<ServerAuthoritativeMovementState> States
@@ -48,7 +51,7 @@ namespace Network.NetworkHost
                 throw new ArgumentNullException(nameof(remoteEndPoint));
             }
 
-            if (string.IsNullOrWhiteSpace(playerId))
+            if (string.IsNullOrWhiteSpace(playerId) || !host.IsAcceptedPlayer(remoteEndPoint, playerId))
             {
                 state = null;
                 return false;
@@ -99,13 +102,14 @@ namespace Network.NetworkHost
             }
 
             if (string.IsNullOrWhiteSpace(input.PlayerId) ||
-                !IsFinite(input.MoveX) ||
+                !IsFinite(input.TurnInput) ||
-                !IsFinite(input.MoveY))
+                !IsFinite(input.ThrottleInput) ||
+                !host.TryResolveAcceptedPeer(sender, input.PlayerId, out var acceptedPeer))
             {
                 return Task.CompletedTask;
             }
 
-            var normalizedSender = Normalize(sender);
+            var normalizedSender = Normalize(acceptedPeer);
             var key = normalizedSender.ToString();
 
             lock (gate)
@@ -113,7 +117,8 @@ namespace Network.NetworkHost
                 if (statesByPeer.TryGetValue(key, out var existingState))
                 {
                     if (!string.Equals(existingState.PlayerId, input.PlayerId, StringComparison.Ordinal) ||
-                        input.Tick <= existingState.LastAcceptedMoveTick)
+                        input.Tick <= existingState.LastAcceptedMoveTick ||
+                        !host.TryRefreshAcceptedGameplayActivity(sender, input.PlayerId))
                     {
                         return Task.CompletedTask;
                     }
@@ -122,6 +127,11 @@ namespace Network.NetworkHost
                     return Task.CompletedTask;
                 }
 
+                if (!host.TryRefreshAcceptedGameplayActivity(sender, input.PlayerId))
+                {
+                    return Task.CompletedTask;
+                }
+
                 var state = new ServerAuthoritativeMovementState(
                     normalizedSender,
                     input.PlayerId,
@@ -172,6 +182,7 @@ namespace Network.NetworkHost
 
             foreach (var pendingBroadcast in pendingBroadcasts)
             {
+                // Keep the coordinator as the only gameplay-relevant PlayerState broadcast path.
                 messageManager.BroadcastMessage(pendingBroadcast.PlayerState, MessageType.PlayerState);
                 host.ObserveAuthoritativeState(pendingBroadcast.RemoteEndPoint, pendingBroadcast.PlayerState.Tick);
             }
@@ -330,32 +341,20 @@ namespace Network.NetworkHost
         private static void ApplyInput(ServerAuthoritativeMovementState state, MoveInput input)
         {
             state.LastAcceptedMoveTick = input.Tick;
-            state.InputX = input.MoveX;
+            state.InputX = ClampInput(input.TurnInput);
-            state.InputY = input.MoveY;
+            state.InputY = ClampInput(input.ThrottleInput);
 
-            if (input.MoveX == 0f && input.MoveY == 0f)
+            if (state.InputY == 0f)
             {
                 state.VelocityX = 0f;
                 state.VelocityY = 0f;
                 state.VelocityZ = 0f;
-                return;
             }
-
-            var length = MathF.Sqrt((input.MoveX * input.MoveX) + (input.MoveY * input.MoveY));
-            if (length <= 0f)
-            {
-                state.VelocityX = 0f;
-                state.VelocityY = 0f;
-                state.VelocityZ = 0f;
-                return;
-            }
-
-            state.Rotation = MathF.Atan2(input.MoveY, input.MoveX) * (180f / MathF.PI);
         }
 
         private void IntegrateState(ServerAuthoritativeMovementState state, TimeSpan elapsed)
         {
-            if (state.IsDead || (state.InputX == 0f && state.InputY == 0f))
+            if (state.IsDead)
             {
                 state.VelocityX = 0f;
                 state.VelocityY = 0f;
@@ -363,25 +362,83 @@ namespace Network.NetworkHost
                 return;
             }
 
-            var length = MathF.Sqrt((state.InputX * state.InputX) + (state.InputY * state.InputY));
-            if (length <= 0f)
-            {
-                state.VelocityX = 0f;
-                state.VelocityY = 0f;
-                state.VelocityZ = 0f;
-                return;
-            }
-
-            var normalizedX = state.InputX / length;
-            var normalizedY = state.InputY / length;
-            state.VelocityX = normalizedX * configuration.MoveSpeed;
-            state.VelocityY = 0f;
-            state.VelocityZ = normalizedY * configuration.MoveSpeed;
-
             var deltaSeconds = (float)elapsed.TotalSeconds;
-            state.PositionX += state.VelocityX * deltaSeconds;
+            if (deltaSeconds <= 0f)
-            state.PositionY += state.VelocityY * deltaSeconds;
+            {
-            state.PositionZ += state.VelocityZ * deltaSeconds;
+                state.VelocityX = 0f;
+                state.VelocityY = 0f;
+                state.VelocityZ = 0f;
+                return;
+            }
+
+            var turnInput = ClampInput(state.InputX);
+            var throttleInput = ClampInput(state.InputY);
+            if (turnInput != 0f)
+            {
+                state.Rotation = NormalizeDegrees(state.Rotation + (turnInput * configuration.TurnSpeedDegreesPerSecond * deltaSeconds));
+            }
+
+            if (throttleInput == 0f)
+            {
+                state.VelocityX = 0f;
+                state.VelocityY = 0f;
+                state.VelocityZ = 0f;
+                return;
+            }
+
+            var rotationRadians = state.Rotation * (MathF.PI / 180f);
+            var forwardX = MathF.Cos(rotationRadians);
+            var forwardZ = MathF.Sin(rotationRadians);
+            state.VelocityX = forwardX * (throttleInput * configuration.MoveSpeed);
+            state.VelocityY = 0f;
+            state.VelocityZ = forwardZ * (throttleInput * configuration.MoveSpeed);
+
+            var candidatePositionX = state.PositionX + (state.VelocityX * deltaSeconds);
+            var candidatePositionY = state.PositionY + (state.VelocityY * deltaSeconds);
+            var candidatePositionZ = state.PositionZ + (state.VelocityZ * deltaSeconds);
+            var validationResult = worldValidator.Validate(new AuthoritativeMovementWorldValidationRequest(
+                state.RemoteEndPoint,
+                state.PlayerId,
+                state.PositionX,
+                state.PositionY,
+                state.PositionZ,
+                candidatePositionX,
+                candidatePositionY,
+                candidatePositionZ,
+                state.VelocityX,
+                state.VelocityY,
+                state.VelocityZ));
+            if (!validationResult.IsAllowed)
+            {
+                state.VelocityX = 0f;
+                state.VelocityY = 0f;
+                state.VelocityZ = 0f;
+                return;
+            }
+
+            state.PositionX = candidatePositionX;
+            state.PositionY = candidatePositionY;
+            state.PositionZ = candidatePositionZ;
+        }
+
+        private static float ClampInput(float value)
+        {
+            return MathF.Max(-1f, MathF.Min(1f, value));
+        }
+
+        private static float NormalizeDegrees(float degrees)
+        {
+            var normalized = degrees % 360f;
+            if (normalized <= -180f)
+            {
+                normalized += 360f;
+            }
+            else if (normalized > 180f)
+            {
+                normalized -= 360f;
+            }
+
+            return normalized;
         }
 
         private static PlayerState BuildPlayerState(ServerAuthoritativeMovementState state, long tick)

Assets/Scripts/Network/NetworkHost/ServerNetworkHost.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Net;
 using System.Threading.Tasks;
 using Network.Defines;
@@ -17,6 +18,8 @@ namespace Network.NetworkHost
         private readonly ServerAuthoritativeCombatCoordinator authoritativeCombatCoordinator;
         private readonly object playerIdentityGate = new();
         private readonly Dictionary<string, string> playerIdsByPeer = new();
+        private readonly Dictionary<string, IPEndPoint> canonicalPeersByPlayerId = new(StringComparer.Ordinal);
+        private readonly Dictionary<string, HashSet<string>> peerKeysByPlayerId = new(StringComparer.Ordinal);
 
         public ServerNetworkHost(
             ITransport transport,
@@ -27,7 +30,8 @@ namespace Network.NetworkHost
             IMessageDeliveryPolicyResolver deliveryPolicyResolver = null,
             SyncSequenceTracker syncSequenceTracker = null,
             ServerAuthoritativeMovementConfiguration authoritativeMovement = null,
-            ServerAuthoritativeCombatConfiguration authoritativeCombat = null)
+            ServerAuthoritativeCombatConfiguration authoritativeCombat = null,
+            IAuthoritativeMovementWorldValidator authoritativeMovementWorldValidator = null)
         {
             this.transport = transport ?? throw new ArgumentNullException(nameof(transport));
             this.syncTransport = syncTransport;
@@ -44,11 +48,14 @@ namespace Network.NetworkHost
                 deliveryPolicyResolver ?? new DefaultMessageDeliveryPolicyResolver(),
                 this.syncTransport,
                 syncSequenceTracker ?? new SyncSequenceTracker());
+            var resolvedWorldValidator = authoritativeMovementWorldValidator ?? PermissiveAuthoritativeMovementWorldValidator.Instance;
             authoritativeMovementCoordinator = new ServerAuthoritativeMovementCoordinator(
                 this,
                 messageManager,
-                authoritativeMovement ?? new ServerAuthoritativeMovementConfiguration());
+                authoritativeMovement ?? new ServerAuthoritativeMovementConfiguration(),
+                resolvedWorldValidator);
             authoritativeCombatCoordinator = new ServerAuthoritativeCombatCoordinator(
+                this,
                 messageManager,
                 authoritativeMovementCoordinator,
                 authoritativeCombat ?? new ServerAuthoritativeCombatConfiguration());
@@ -102,6 +109,8 @@ namespace Network.NetworkHost
             lock (playerIdentityGate)
             {
                 playerIdsByPeer.Clear();
+                canonicalPeersByPlayerId.Clear();
+                peerKeysByPlayerId.Clear();
             }
             PublishMetricsSessionSnapshots();
         }
@@ -137,6 +146,117 @@ namespace Network.NetworkHost
             return authoritativeCombatCoordinator.TryGetState(remoteEndPoint, out state);
         }
 
+        public bool TryGetAcceptedPlayerId(IPEndPoint remoteEndPoint, out string playerId)
+        {
+            return TryGetKnownPlayerId(remoteEndPoint, out playerId);
+        }
+
+        public bool IsAcceptedPlayer(IPEndPoint remoteEndPoint, string playerId)
+        {
+            return !string.IsNullOrWhiteSpace(playerId) &&
+                TryGetKnownPlayerId(remoteEndPoint, out var acceptedPlayerId) &&
+                string.Equals(acceptedPlayerId, playerId, StringComparison.Ordinal);
+        }
+
+        public bool TryResolveAcceptedPeer(IPEndPoint remoteEndPoint, string playerId, out IPEndPoint acceptedPeer)
+        {
+            acceptedPeer = null;
+            if (remoteEndPoint == null || string.IsNullOrWhiteSpace(playerId))
+            {
+                return false;
+            }
+
+            var normalizedRemoteEndPoint = Normalize(remoteEndPoint);
+            var remoteKey = normalizedRemoteEndPoint.ToString();
+
+            lock (playerIdentityGate)
+            {
+                if (playerIdsByPeer.TryGetValue(remoteKey, out var mappedPlayerId))
+                {
+                    if (!string.Equals(mappedPlayerId, playerId, StringComparison.Ordinal))
+                    {
+                        return false;
+                    }
+
+                    if (!canonicalPeersByPlayerId.TryGetValue(playerId, out acceptedPeer))
+                    {
+                        acceptedPeer = normalizedRemoteEndPoint;
+                    }
+
+                    return true;
+                }
+
+                if (!canonicalPeersByPlayerId.TryGetValue(playerId, out acceptedPeer))
+                {
+                    return false;
+                }
+
+                playerIdsByPeer[remoteKey] = playerId;
+                if (!peerKeysByPlayerId.TryGetValue(playerId, out var peerKeys))
+                {
+                    peerKeys = new HashSet<string>(StringComparer.Ordinal);
+                    peerKeysByPlayerId[playerId] = peerKeys;
+                }
+
+                peerKeys.Add(remoteKey);
+                return true;
+            }
+        }
+
+        public bool IsPlayerIdInUse(string playerId)
+        {
+            if (string.IsNullOrWhiteSpace(playerId))
+            {
+                return false;
+            }
+
+            lock (playerIdentityGate)
+            {
+                foreach (var acceptedPlayerId in playerIdsByPeer.Values)
+                {
+                    if (string.Equals(acceptedPlayerId, playerId, StringComparison.Ordinal))
+                    {
+                        return true;
+                    }
+                }
+            }
+
+            foreach (var state in authoritativeMovementCoordinator.States)
+            {
+                if (string.Equals(state.PlayerId, playerId, StringComparison.Ordinal))
+                {
+                    return true;
+                }
+            }
+
+            foreach (var state in authoritativeCombatCoordinator.States)
+            {
+                if (string.Equals(state.PlayerId, playerId, StringComparison.Ordinal))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public bool TryRefreshAcceptedGameplayActivity(IPEndPoint remoteEndPoint, string playerId)
+        {
+            if (!TryResolveAcceptedPeer(remoteEndPoint, playerId, out var acceptedPeer))
+            {
+                return false;
+            }
+
+            if (!TryGetSession(acceptedPeer, out var session) ||
+                session.SessionManager.State != ConnectionState.LoggedIn)
+            {
+                return false;
+            }
+
+            NotifyInboundActivity(acceptedPeer);
+            return true;
+        }
+
         public void NotifyLoginStarted(IPEndPoint remoteEndPoint)
         {
             SessionCoordinator.NotifyLoginStarted(remoteEndPoint);
@@ -159,7 +279,7 @@ namespace Network.NetworkHost
         public void NotifyLoginFailed(IPEndPoint remoteEndPoint, string reason = null)
         {
             SessionCoordinator.NotifyLoginFailed(remoteEndPoint, reason);
-            ForgetPlayerId(remoteEndPoint);
+            ForgetPeerIdentity(remoteEndPoint);
             PublishMetricsSessionSnapshot(remoteEndPoint);
         }
 
@@ -189,20 +309,34 @@ namespace Network.NetworkHost
 
         public bool RemoveSession(IPEndPoint remoteEndPoint, string reason = null)
         {
-            if (!SessionCoordinator.TryGetSession(remoteEndPoint, out var session))
+            if (!TryGetKnownPlayerId(remoteEndPoint, out var playerId) ||
+                !TryResolveAcceptedPeer(remoteEndPoint, playerId, out var acceptedPeer) ||
+                !SessionCoordinator.TryGetSession(acceptedPeer, out var session))
             {
                 return false;
             }
 
-            var removed = SessionCoordinator.RemoveSession(remoteEndPoint, reason);
+            var removed = SessionCoordinator.RemoveSession(acceptedPeer, reason);
             if (!removed)
             {
                 return false;
             }
 
-            authoritativeMovementCoordinator.RemoveState(remoteEndPoint);
+            authoritativeMovementCoordinator.RemoveState(acceptedPeer);
-            authoritativeCombatCoordinator.RemoveState(remoteEndPoint);
+            authoritativeCombatCoordinator.RemoveState(acceptedPeer);
-            ForgetPlayerId(remoteEndPoint);
+
+            var knownPeerEndpoints = GetKnownPeerEndpointsForPlayerId(playerId);
+            ForgetPlayerId(playerId);
+
+            foreach (var peerEndPoint in knownPeerEndpoints)
+            {
+                SessionCoordinator.RemoveSession(peerEndPoint, reason);
+                RemoveTransportPeerSession(transport, peerEndPoint);
+                if (syncTransport != null && !ReferenceEquals(syncTransport, transport))
+                {
+                    RemoveTransportPeerSession(syncTransport, peerEndPoint);
+                }
+            }
 
             RecordMetricsSessionSnapshot(transport, "server-host", session, ConnectionState.Disconnected);
             if (syncTransport != null && !ReferenceEquals(syncTransport, transport))
@@ -216,10 +350,17 @@ namespace Network.NetworkHost
         private void HandleTransportReceive(byte[] data, IPEndPoint sender)
         {
             SessionCoordinator.ObserveTransportActivity(sender);
-            ObservePlayerIdentity(data, sender);
             PublishMetricsSessionSnapshot(sender);
         }
 
+        private static void RemoveTransportPeerSession(ITransport transport, IPEndPoint remoteEndPoint)
+        {
+            if (transport is IPeerSessionTransport peerSessionTransport)
+            {
+                peerSessionTransport.RemovePeerSession(remoteEndPoint);
+            }
+        }
+
         private void BootstrapAuthoritativeMovementState(IPEndPoint remoteEndPoint)
         {
             if (!TryGetKnownPlayerId(remoteEndPoint, out var playerId))
@@ -230,41 +371,6 @@ namespace Network.NetworkHost
             authoritativeMovementCoordinator.EnsureState(remoteEndPoint, playerId, out _);
         }
 
-        private void ObservePlayerIdentity(byte[] data, IPEndPoint sender)
-        {
-            if (data == null || sender == null)
-            {
-                return;
-            }
-
-            Envelope envelope;
-            try
-            {
-                envelope = Envelope.Parser.ParseFrom(data);
-            }
-            catch
-            {
-                return;
-            }
-
-            if ((MessageType)envelope.Type != MessageType.LoginRequest)
-            {
-                return;
-            }
-
-            LoginRequest request;
-            try
-            {
-                request = LoginRequest.Parser.ParseFrom(envelope.Payload);
-            }
-            catch
-            {
-                return;
-            }
-
-            RememberPlayerId(sender, request.PlayerId);
-        }
-
         private void RememberPlayerId(IPEndPoint remoteEndPoint, string playerId)
         {
             if (remoteEndPoint == null || string.IsNullOrWhiteSpace(playerId))
@@ -272,10 +378,19 @@ namespace Network.NetworkHost
                 return;
             }
 
-            var key = Normalize(remoteEndPoint).ToString();
+            var normalizedRemoteEndPoint = Normalize(remoteEndPoint);
+            var key = normalizedRemoteEndPoint.ToString();
             lock (playerIdentityGate)
             {
                 playerIdsByPeer[key] = playerId;
+                canonicalPeersByPlayerId[playerId] = normalizedRemoteEndPoint;
+                if (!peerKeysByPlayerId.TryGetValue(playerId, out var peerKeys))
+                {
+                    peerKeys = new HashSet<string>(StringComparer.Ordinal);
+                    peerKeysByPlayerId[playerId] = peerKeys;
+                }
+
+                peerKeys.Add(key);
             }
         }
 
@@ -294,7 +409,51 @@ namespace Network.NetworkHost
             }
         }
 
-        private void ForgetPlayerId(IPEndPoint remoteEndPoint)
+        private IReadOnlyList<IPEndPoint> GetKnownPeerEndpointsForPlayerId(string playerId)
+        {
+            if (string.IsNullOrWhiteSpace(playerId))
+            {
+                return Array.Empty<IPEndPoint>();
+            }
+
+            lock (playerIdentityGate)
+            {
+                if (!peerKeysByPlayerId.TryGetValue(playerId, out var peerKeys))
+                {
+                    return Array.Empty<IPEndPoint>();
+                }
+
+                return peerKeys
+                    .Select(ParseEndPoint)
+                    .Where(static endpoint => endpoint != null)
+                    .ToArray();
+            }
+        }
+
+        private void ForgetPlayerId(string playerId)
+        {
+            if (string.IsNullOrWhiteSpace(playerId))
+            {
+                return;
+            }
+
+            lock (playerIdentityGate)
+            {
+                if (peerKeysByPlayerId.TryGetValue(playerId, out var peerKeys))
+                {
+                    foreach (var peerKey in peerKeys)
+                    {
+                        playerIdsByPeer.Remove(peerKey);
+                    }
+
+                    peerKeysByPlayerId.Remove(playerId);
+                }
+
+                canonicalPeersByPlayerId.Remove(playerId);
+            }
+        }
+
+        private void ForgetPeerIdentity(IPEndPoint remoteEndPoint)
         {
             if (remoteEndPoint == null)
             {
@@ -304,10 +463,49 @@ namespace Network.NetworkHost
             var key = Normalize(remoteEndPoint).ToString();
             lock (playerIdentityGate)
             {
+                if (!playerIdsByPeer.TryGetValue(key, out var playerId))
+                {
+                    return;
+                }
+
                 playerIdsByPeer.Remove(key);
+                if (peerKeysByPlayerId.TryGetValue(playerId, out var peerKeys))
+                {
+                    peerKeys.Remove(key);
+                    if (peerKeys.Count == 0)
+                    {
+                        peerKeysByPlayerId.Remove(playerId);
+                        canonicalPeersByPlayerId.Remove(playerId);
+                    }
+                }
             }
         }
 
+        private static IPEndPoint ParseEndPoint(string value)
+        {
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                return null;
+            }
+
+            var lastColonIndex = value.LastIndexOf(':');
+            if (lastColonIndex <= 0 || lastColonIndex >= value.Length - 1)
+            {
+                return null;
+            }
+
+            var addressText = value.Substring(0, lastColonIndex);
+            if (addressText.Length > 1 && addressText[0] == '[' && addressText[addressText.Length - 1] == ']')
+            {
+                addressText = addressText.Substring(1, addressText.Length - 2);
+            }
+
+            return IPAddress.TryParse(addressText, out var address) &&
+                int.TryParse(value.Substring(lastColonIndex + 1), out var port)
+                ? new IPEndPoint(address, port)
+                : null;
+        }
+
         private static IPEndPoint Normalize(IPEndPoint remoteEndPoint)
         {
             if (remoteEndPoint == null)

Assets/Scripts/Network/NetworkHost/ServerRuntimeConfiguration.cs

@@ -14,6 +14,7 @@ namespace Network.NetworkHost
             }
 
             ReliablePort = reliablePort;
+            AuthoritativeMovementWorldValidator = PermissiveAuthoritativeMovementWorldValidator.Instance;
         }
 
         public int ReliablePort { get; }
@@ -36,6 +37,8 @@ namespace Network.NetworkHost
 
         public ServerAuthoritativeCombatConfiguration AuthoritativeCombat { get; set; }
 
+        public IAuthoritativeMovementWorldValidator AuthoritativeMovementWorldValidator { get; set; }
+
         internal void Validate()
         {
             if (ReliablePort <= 0)
@@ -58,6 +61,10 @@ namespace Network.NetworkHost
 
             AuthoritativeMovement?.Validate();
             AuthoritativeCombat?.Validate();
+            if (AuthoritativeMovementWorldValidator == null)
+            {
+                throw new ArgumentNullException(nameof(AuthoritativeMovementWorldValidator));
+            }
         }
     }
 }

Assets/Scripts/Network/NetworkHost/ServerRuntimeEntryPoint.cs

@@ -25,7 +25,8 @@ namespace Network.NetworkHost
                 configuration.SyncSequenceTracker,
                 configuration.TransportFactory,
                 configuration.AuthoritativeMovement,
-                configuration.AuthoritativeCombat);
+                configuration.AuthoritativeCombat,
+                configuration.AuthoritativeMovementWorldValidator);
 
             try
             {

Assets/Scripts/Network/NetworkTransport/ClientSession.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Net;
+
+namespace Network.NetworkTransport
+{
+    public class ClientSession
+    {
+        public IPEndPoint EndPoint { get; }
+        public DateTime LastActivity { get; private set; }
+
+        public uint SendSequenceNumber { get; private set; } = 0;
+
+        //TODO: 数据结构——ConcurrentDictionary
+        public ConcurrentDictionary<uint, (Packet packet, DateTime sendTime)> PendingAcks { get; } =
+            new ConcurrentDictionary<uint, (Packet packet, DateTime sendTime)>();
+
+        public uint ExpectedReceiveSequence { get; private set; } = 0;
+        private HashSet<uint> _receivedSequences { get; } = new HashSet<uint>();
+
+        private readonly object _lockObj = new object();
+
+        public ClientSession(IPEndPoint endPoint)
+        {
+            EndPoint = endPoint;
+            LastActivity = DateTime.Now;
+        }
+
+        public uint GetNextSendSequence()
+        {
+            lock (_lockObj)
+            {
+                return SendSequenceNumber++;
+            }
+        }
+
+        public bool TryProcessReceiveSequence(uint sequenceNumber, out bool shouldDeliver)
+        {
+            lock (_lockObj)
+            {
+                LastActivity = DateTime.Now;
+
+                if (sequenceNumber == ExpectedReceiveSequence)
+                {
+                    ExpectedReceiveSequence++;
+                    _receivedSequences.Add(sequenceNumber);
+                    shouldDeliver = true;
+                    return true;
+                }
+                else if (sequenceNumber < ExpectedReceiveSequence)
+                {
+                    shouldDeliver = false;
+                    return _receivedSequences.Contains(sequenceNumber);
+                }
+                else
+                {
+                    shouldDeliver = false;
+                    return false;
+                }
+            }
+        }
+    }
+}

Assets/Scripts/Network/NetworkTransport/ClientSession.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: c007e0986e972b14cb4b4ab2151459c3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkTransport/IPeerSessionTransport.cs

@@ -0,0 +1,9 @@
+using System.Net;
+
+namespace Network.NetworkTransport
+{
+    public interface IPeerSessionTransport
+    {
+        bool RemovePeerSession(IPEndPoint remoteEndPoint);
+    }
+}

Assets/Scripts/Network/NetworkTransport/IPeerSessionTransport.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b2637543abd875349aaa27b3e31f9dbe
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkTransport/KcpTransport.KcpSession.cs.meta

@@ -1,3 +1,11 @@
-fileFormatVersion: 2
+fileFormatVersion: 2
 guid: 63fb533d620e4ac0bf15ba0a9a71331e
-timeCreated: 1774593005
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkTransport/KcpTransport.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.Linq;
 using System.Net;
@@ -10,7 +10,7 @@ using kcp;
 
 namespace Network.NetworkTransport
 {
-    public partial class KcpTransport : ITransport, ITransportMetricsSink
+    public partial class KcpTransport : ITransport, ITransportMetricsSink, IPeerSessionTransport
     {
         private const uint DefaultConv = 1;
         private const int DefaultNoDelay = 1;
@@ -233,6 +233,26 @@ namespace Network.NetworkTransport
             }
         }
 
+        public bool RemovePeerSession(IPEndPoint remoteEndPoint)
+        {
+            if (remoteEndPoint == null)
+            {
+                throw new ArgumentNullException(nameof(remoteEndPoint));
+            }
+
+            var normalizedEndPoint = NormalizeEndPoint(remoteEndPoint);
+            var key = normalizedEndPoint.ToString();
+            if (!_sessions.TryRemove(key, out var session))
+            {
+                return false;
+            }
+
+            RecordSessionDiagnostics(session, "removed");
+            session.Dispose();
+            _metricsModule.RecordSessionClosed(session.RemoteEndPoint);
+            return true;
+        }
+
         private KcpSession GetOrCreateSession(IPEndPoint remoteEndPoint, uint conv)
         {
             var normalizedEndPoint = NormalizeEndPoint(remoteEndPoint);

Assets/Scripts/Network/NetworkTransport/Packet.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Linq;
+
+namespace Network.NetworkTransport
+{
+    public enum PacketType : byte
+    {
+        Data = 1,
+        Ack = 2,
+    }
+
+    public struct Packet
+    {
+        public PacketType Type;
+        public uint SequenceNumber;
+        public byte[] Data;
+
+        public byte[] ToBytes()
+        {
+            var result = new byte[1 + 4 + Data.Length];
+            result[0] = (byte)Type;
+            BitConverter.GetBytes(SequenceNumber).CopyTo(result, 1);
+            Data.CopyTo(result, 5);
+            return result;
+        }
+
+        public static Packet FromBytes(byte[] data)
+        {
+            return new Packet
+            {
+                Type = (PacketType)data[0],
+                SequenceNumber = BitConverter.ToUInt32(data, 1),
+                //TODO: 结构体——ArraySegment
+                Data = new ArraySegment<byte>(data, 5, data.Length - 5).ToArray()
+            };
+        }
+
+        public static Packet CreateDataPacket(uint seqNum, byte[] data)
+        {
+            return new Packet
+            {
+                Type = PacketType.Data,
+                SequenceNumber = seqNum,
+                Data = data
+            };
+        }
+
+        public static Packet CreateAckPacket(uint seqNum)
+        {
+            return new Packet
+            {
+                Type = PacketType.Ack,
+                SequenceNumber = seqNum,
+                Data = Array.Empty<byte>()
+            };
+        }
+    }
+}

Assets/Scripts/Network/NetworkTransport/Packet.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a16c0628d84e6274bbe164e0e57533e4
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkTransport/ReliableUdpTransport.cs

@@ -0,0 +1,312 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Network.NetworkTransport
+{
+    internal sealed class LegacyUdpTransportAdapter : ITransport, IPeerSessionTransport
+    {
+        private readonly UdpClient _client;
+        private readonly IPEndPoint? _defaultRemoteEndPoint;
+        private readonly bool _isServer;
+
+        private readonly ConcurrentDictionary<string, ClientSession> _sessions = new ConcurrentDictionary<string, ClientSession>();
+        private readonly ConcurrentDictionary<Packet, int> _resentPacketTimes = new ConcurrentDictionary<Packet, int>();
+        private readonly Timer _retransmitTimer;
+        private readonly Timer _cleanupTimer;
+
+        //TODO: volatile 关键字
+        private volatile bool _isRunning;
+
+        // 配置参数
+        private const int RetransmitTimeoutMs = 1000;
+        private const int SessionTimeoutMs = 30000;
+        private const int MaxRetransmitAttempts = 5;
+
+        public event Action<byte[], IPEndPoint>? OnReceive;
+
+        // 构造函数——服务端模式
+        public LegacyUdpTransportAdapter(int listenPort)
+        {
+            _client = new UdpClient(listenPort);
+            _isServer = true;
+            _retransmitTimer = new Timer(CheckRetransmit, null, 100, 100);
+            _cleanupTimer = new Timer(CleanupSessions, null, 5000, 5000);
+            Console.WriteLine($"[Transport] 服务端模式，监听端口: {listenPort}");
+        }
+
+        // 构造函数——客户端模式
+        public LegacyUdpTransportAdapter(string serverIP, int serverPort)
+        {
+            _client = new UdpClient(0);
+            _defaultRemoteEndPoint = new IPEndPoint(IPAddress.Parse(serverIP), serverPort);
+
+            _isServer = false;
+            _retransmitTimer = new Timer(CheckRetransmit, null, 100, 100);
+            _cleanupTimer = new Timer(CleanupSessions, null, 5000, 5000);
+            Console.WriteLine($"[Transport] 客户端模式，目标: {_defaultRemoteEndPoint}");
+        }
+
+        public async Task StartAsync()
+        {
+            _sessions.Clear();
+
+            _isRunning = true;
+            Console.WriteLine("[Transport] 传输层启动");
+
+            // 开始接收数据
+            _ = Task.Run(ReceiveLoop);
+            await Task.Delay(100); // 给接收循环一点启动时间
+        }
+
+        public void Stop()
+        {
+            _isRunning = false;
+            _retransmitTimer.Dispose();
+            _cleanupTimer.Dispose();
+            _client.Close();
+            _sessions.Clear();
+            Console.WriteLine("[Transport] 传输层停止");
+        }
+
+        public void Send(byte[] data)
+        {
+            if (!_isServer && _defaultRemoteEndPoint != null)
+            {
+                SendTo(data, _defaultRemoteEndPoint);
+            }
+            else
+            {
+                throw new InvalidOperationException("服务端模式必须使用 SendTo 指定目标");
+            }
+        }
+
+        public void SendTo(byte[] data, IPEndPoint target)
+        {
+            if (!_isRunning)
+            {
+                return;
+            }
+
+            var session = GetOrCreateSession(target);
+            uint seqNum = session.GetNextSendSequence();
+            var packet = Packet.CreateDataPacket(seqNum, data);
+
+            session.PendingAcks[seqNum] = (packet, DateTime.Now);
+
+            SendPacketTo(packet, target);
+            Console.WriteLine($"[Transport] 发送数据包到 {target} SeqNum={seqNum}, DataLen={data.Length}");
+        }
+
+        public void SendToAll(byte[] data)
+        {
+            foreach (var session in _sessions.Values)
+            {
+                SendTo(data, session.EndPoint);
+            }
+        }
+
+        public bool RemovePeerSession(IPEndPoint remoteEndPoint)
+        {
+            if (remoteEndPoint == null)
+            {
+                throw new ArgumentNullException(nameof(remoteEndPoint));
+            }
+
+            return _sessions.TryRemove(remoteEndPoint.ToString(), out _);
+        }
+    
+        private async void ReceiveLoop()
+        {
+            while (_isRunning)
+            {
+                try
+                {
+                    var result = await _client.ReceiveAsync();
+                    var packet = Packet.FromBytes(result.Buffer);
+
+                    if (packet.Type == PacketType.Data)
+                    {
+                        HandleDataPacket(packet, result.RemoteEndPoint);
+                    }
+                    else if (packet.Type == PacketType.Ack)
+                    {
+                        HandleAckPacket(packet, result.RemoteEndPoint);
+                    }
+                }
+                catch (ObjectDisposedException)
+                {
+                    return; // 正常关闭
+                }
+                catch (Exception e)
+                {
+                    Console.WriteLine($"[Transport] 接收错误：{e.Message}");
+                }
+            }
+        }
+
+        private void HandleDataPacket(Packet packet, IPEndPoint senderEndPoint)
+        {
+            var session = GetOrCreateSession(senderEndPoint);
+
+            Console.WriteLine(
+                $"[Transport] 收到数据包从{senderEndPoint} SeqNum={packet.SequenceNumber}, DataLen={packet.Data.Length}");
+
+            // 发送ACK
+            var ackPacket = Packet.CreateAckPacket(packet.SequenceNumber);
+            SendPacketTo(ackPacket, senderEndPoint);
+            Console.WriteLine($"[Transport] 发送ACK 到 {senderEndPoint} SeqNum={packet.SequenceNumber}");
+
+            // 检查是否应该交付
+            if (session.TryProcessReceiveSequence(packet.SequenceNumber, out bool shouldDeliver))
+            {
+                if (shouldDeliver)
+                {
+                    OnReceive?.Invoke(packet.Data, senderEndPoint);
+                    Console.WriteLine($"[Transport] 交付数据包从 {senderEndPoint} SeqNum={packet.SequenceNumber}");
+                }
+                else
+                {
+                    Console.WriteLine($"[Transport] 重复包从 {senderEndPoint} SeqNum={packet.SequenceNumber}，忽略");
+                }
+            }
+            else
+            {
+                // 乱序到达，暂存（简化处理：直接丢弃，依赖重传）
+                Console.WriteLine($"[Transport] 乱序包从 {senderEndPoint} SeqNum={packet.SequenceNumber}，丢弃");
+            }
+        }
+
+        private void HandleAckPacket(Packet packet, IPEndPoint senderEndPoint)
+        {
+            var session = GetOrCreateSession(senderEndPoint);
+            Console.WriteLine($"[Transport] 收到ACK从 {senderEndPoint} SeqNum={packet.SequenceNumber}");
+        
+            if (session.PendingAcks.TryRemove(packet.SequenceNumber, out _))
+            {
+                Console.WriteLine($"[Transport] 确认包到 {senderEndPoint} SeqNum={packet.SequenceNumber}");
+            }
+        }
+
+        private ClientSession GetOrCreateSession(IPEndPoint endPoint)
+        {
+            string key = endPoint.ToString();
+            return _sessions.GetOrAdd(key, _ =>
+            {
+                var session = new ClientSession(endPoint);
+                Console.WriteLine($"创建新会话：{endPoint}");
+                return session;
+            });
+        }
+
+        private void CheckRetransmit(object? state)
+        {
+            if (!_isRunning)
+            {
+                return;
+            }
+
+            var now = DateTime.Now;
+            var toRetransmit = new List<(IPEndPoint target, uint seqNum, Packet packet)>();
+
+            foreach (var sessionKvp in _sessions)
+            {
+                var session = sessionKvp.Value;
+                foreach (var ackKvp in session.PendingAcks)
+                {
+                    var timeSinceLastSend = now - ackKvp.Value.sendTime;
+                    if (timeSinceLastSend.TotalMilliseconds > RetransmitTimeoutMs)
+                    {
+                        toRetransmit.Add((session.EndPoint, ackKvp.Key, ackKvp.Value.packet));
+                        _resentPacketTimes.TryAdd(ackKvp.Value.packet, 0);
+                    }
+                }
+            }
+
+
+            foreach (var (target, seqNum, packet) in toRetransmit)
+            {
+                var session = GetOrCreateSession(target);
+                if (session.PendingAcks.ContainsKey(seqNum))
+                {
+                    // 更新发送时间
+                    session.PendingAcks[seqNum] = (packet, now);
+                    SendPacketTo(packet, target);
+                    Console.WriteLine($"[Transport] 重传包到 {target} SeqNum={seqNum}");
+
+                    _resentPacketTimes[packet]++;
+                    if (_resentPacketTimes[packet] >= MaxRetransmitAttempts)
+                    {
+                        // 达到最大重传次数，放弃该会话
+                        Console.WriteLine($"[Transport] 达到最大重传次数，放弃会话 {target}");
+                        _sessions.TryRemove(target.ToString(), out _);
+                    }
+                }
+            }
+        }
+
+        private void CleanupSessions(object? state)
+        {
+            if (!_isRunning)
+            {
+                return;
+            }
+
+            var now = DateTime.Now;
+            var toRemove = new List<string>();
+
+            foreach (var sessionKvp in _sessions)
+            {
+                var session = sessionKvp.Value;
+                var timeSinceLastActivity = now - session.LastActivity;
+
+                if (timeSinceLastActivity.TotalMilliseconds > SessionTimeoutMs)
+                {
+                    toRemove.Add(sessionKvp.Key);
+                }
+            }
+
+            foreach (string key in toRemove)
+            {
+                //TODO: 清理会话的同时清理PlayerManager中的玩家数据
+                if (_sessions.TryRemove(key, out var session))
+                {
+                    Console.WriteLine($"[Transport] 清理超时会话：{session.EndPoint}");
+                }
+            }
+
+            if (_isServer)
+            {
+                PrintSessionInfo();    
+            }
+        }
+
+        private async void SendPacketTo(Packet packet, IPEndPoint? endPoint)
+        {
+            try
+            {
+                var data = packet.ToBytes();
+                await _client.SendAsync(data, data.Length, endPoint);
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine($"[Transport] 发送错误：{e.Message}");
+            }
+        }
+
+        private void PrintSessionInfo()
+        {
+            Console.WriteLine($"当前活跃会话数：{_sessions.Count}");
+            foreach (var sessionKvp in _sessions)
+            {
+                var session = sessionKvp.Value;
+                Console.WriteLine(
+                    $"  会话：{session.EndPoint}，发送SeqNum：{session.SendSequenceNumber}，期望接收：{session.ExpectedReceiveSequence}，待确认: {session.PendingAcks.Count}");
+            }
+        }
+    }
+}

Assets/Scripts/Network/NetworkTransport/ReliableUdpTransport.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: e740e71ab20f62d40bf5f56c2142bf02
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Network/NetworkTransport/TransportMetricsModule.cs.meta

@@ -8,4 +8,4 @@ MonoImporter:
   icon: {instanceID: 0}
   userData: 
   assetBundleName: 
-  assetBundleVariant: 
+  assetBundleVariant: 

Assets/Tests/EditMode/Network/GameplayFlowRoundTripTests.cs

@@ -49,6 +49,11 @@ namespace Tests.EditMode.Network
             clientRuntime.StartAsync().GetAwaiter().GetResult();
             using var serverRuntime = ServerRuntimeEntryPoint.StartAsync(configuration).GetAwaiter().GetResult();
 
+            serverRuntime.Host.NotifyLoginStarted(ClientPeer);
+            serverRuntime.Host.NotifyLoginSucceeded(ClientPeer, "player-a");
+            serverRuntime.Host.NotifyLoginStarted(RemotePeer);
+            serverRuntime.Host.NotifyLoginSucceeded(RemotePeer, "player-b");
+
             serverTransports[9001].EmitReceive(
                 GameplayFlowTestSupport.BuildEnvelope(
                     MessageType.MoveInput,
@@ -56,8 +61,8 @@ namespace Tests.EditMode.Network
                     {
                         PlayerId = "player-b",
                         Tick = 1,
-                        MoveX = 0f,
+                        TurnInput = 0f,
-                        MoveY = 0f
+                        ThrottleInput = 0f
                     }),
                 RemotePeer);
             serverRuntime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
@@ -69,8 +74,8 @@ namespace Tests.EditMode.Network
                 {
                     PlayerId = "player-a",
                     Tick = 1,
-                    MoveX = 1f,
+                    TurnInput = 0f,
-                    MoveY = 0f
+                    ThrottleInput = 1f
                 },
                 MessageType.MoveInput);
             ClientGameplayInputFlow.SendShootInput(
@@ -162,9 +167,9 @@ namespace Tests.EditMode.Network
                 RemotePeer);
 
             serverRuntime.Host.NotifyLoginStarted(ClientPeer);
-            serverRuntime.Host.NotifyLoginSucceeded(ClientPeer);
+            serverRuntime.Host.NotifyLoginSucceeded(ClientPeer, "player-a");
             serverRuntime.Host.NotifyLoginStarted(RemotePeer);
-            serverRuntime.Host.NotifyLoginSucceeded(RemotePeer);
+            serverRuntime.Host.NotifyLoginSucceeded(RemotePeer, "player-b");
             serverRuntime.UpdateAuthoritativeMovement(TimeSpan.FromMilliseconds(50));
 
             TransferBroadcastMessages(serverTransports[9001], clientSyncTransport, ServerSender);
@@ -186,8 +191,8 @@ namespace Tests.EditMode.Network
                     {
                         PlayerId = "player-b",
                         Tick = 1,
-                        MoveX = 1f,
+                        TurnInput = 0f,
-                        MoveY = 0f
+                        ThrottleInput = 1f
                     }),
                 RemotePeer);
             serverRuntime.DrainPendingMessagesAsync().GetAwaiter().GetResult();

Assets/Tests/EditMode/Network/MessageManagerTests.cs

@@ -68,8 +68,8 @@ namespace Tests.EditMode.Network
             {
                 PlayerId = "player-1",
                 Tick = 12,
-                MoveX = 1,
+                TurnInput = 1,
-                MoveY = -1
+                ThrottleInput = -1
             };
 
             manager.SendMessage(message, MessageType.MoveInput);
@@ -82,8 +82,8 @@ namespace Tests.EditMode.Network
             Assert.That(envelope.Type, Is.EqualTo((int)MessageType.MoveInput));
             Assert.That(parsed.PlayerId, Is.EqualTo("player-1"));
             Assert.That(parsed.Tick, Is.EqualTo(12));
-            Assert.That(parsed.MoveX, Is.EqualTo(1));
+            Assert.That(parsed.TurnInput, Is.EqualTo(1));
-            Assert.That(parsed.MoveY, Is.EqualTo(-1));
+            Assert.That(parsed.ThrottleInput, Is.EqualTo(-1));
         }
 
         [Test]
@@ -100,8 +100,8 @@ namespace Tests.EditMode.Network
             {
                 PlayerId = "player-1",
                 Tick = 13,
-                MoveX = 0f,
+                TurnInput = 0f,
-                MoveY = 0f
+                ThrottleInput = 0f
             };
 
             manager.SendMessage(message, MessageType.MoveInput);
@@ -114,8 +114,8 @@ namespace Tests.EditMode.Network
             Assert.That(envelope.Type, Is.EqualTo((int)MessageType.MoveInput));
             Assert.That(parsed.PlayerId, Is.EqualTo("player-1"));
             Assert.That(parsed.Tick, Is.EqualTo(13));
-            Assert.That(parsed.MoveX, Is.EqualTo(0f));
+            Assert.That(parsed.TurnInput, Is.EqualTo(0f));
-            Assert.That(parsed.MoveY, Is.EqualTo(0f));
+            Assert.That(parsed.ThrottleInput, Is.EqualTo(0f));
         }
 
         [Test]
@@ -350,12 +350,12 @@ namespace Tests.EditMode.Network
             });
 
             transport.EmitReceive(
-                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-1", Tick = 8, MoveX = 1 }),
+                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-1", Tick = 8, ThrottleInput = 1 }),
                 Sender);
             manager.DrainPendingMessagesAsync().GetAwaiter().GetResult();
 
             transport.EmitReceive(
-                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-1", Tick = 6, MoveX = -1 }),
+                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-1", Tick = 6, ThrottleInput = -1 }),
                 Sender);
             manager.DrainPendingMessagesAsync().GetAwaiter().GetResult();
 

Assets/Tests/EditMode/Network/ServerAuthoritativeCombatTests.cs

@@ -39,8 +39,8 @@ namespace Tests.EditMode.Network
 
             using var runtime = ServerRuntimeEntryPoint.StartAsync(configuration).GetAwaiter().GetResult();
 
-            PrimePlayer(createdTransports[9000], PeerA, "player-a", 1);
+            PrimePlayer(runtime, PeerA, "player-a");
-            PrimePlayer(createdTransports[9000], PeerB, "player-b", 1);
+            PrimePlayer(runtime, PeerB, "player-b");
             runtime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
 
             createdTransports[9000].EmitReceive(BuildEnvelope(MessageType.ShootInput, new ShootInput
@@ -111,8 +111,8 @@ namespace Tests.EditMode.Network
 
             using var runtime = ServerRuntimeEntryPoint.StartAsync(configuration).GetAwaiter().GetResult();
 
-            PrimePlayer(createdTransports[9001], PeerA, "player-a", 1);
+            PrimePlayer(runtime, PeerA, "player-a");
-            PrimePlayer(createdTransports[9001], PeerB, "player-b", 1);
+            PrimePlayer(runtime, PeerB, "player-b");
             runtime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
 
             createdTransports[9000].EmitReceive(BuildEnvelope(MessageType.ShootInput, new ShootInput
@@ -166,8 +166,8 @@ namespace Tests.EditMode.Network
 
             using var runtime = ServerRuntimeEntryPoint.StartAsync(configuration).GetAwaiter().GetResult();
 
-            PrimePlayer(createdTransports[9000], PeerA, "player-a", 1);
+            PrimePlayer(runtime, PeerA, "player-a");
-            PrimePlayer(createdTransports[9000], PeerB, "player-b", 1);
+            PrimePlayer(runtime, PeerB, "player-b");
             runtime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
 
             createdTransports[9000].EmitReceive(BuildEnvelope(MessageType.ShootInput, new ShootInput
@@ -192,15 +192,10 @@ namespace Tests.EditMode.Network
             Assert.That(runtime.AuthoritativeCombatStates.Count, Is.EqualTo(0));
         }
 
-        private static void PrimePlayer(FakeTransport transport, IPEndPoint peer, string playerId, long tick)
+        private static void PrimePlayer(ServerRuntimeHandle runtime, IPEndPoint peer, string playerId)
         {
-            transport.EmitReceive(BuildEnvelope(MessageType.MoveInput, new MoveInput
+            runtime.Host.NotifyLoginStarted(peer);
-            {
+            runtime.Host.NotifyLoginSucceeded(peer, playerId);
-                PlayerId = playerId,
-                Tick = tick,
-                MoveX = 0f,
-                MoveY = 0f
-            }), peer);
         }
 
         private static FakeTransport CreateTransport(IDictionary<int, FakeTransport> createdTransports, int port)

Assets/Tests/EditMode/Network/ServerAuthoritativeMovementTests.cs

@@ -33,26 +33,31 @@ namespace Tests.EditMode.Network
 
             using var runtime = ServerRuntimeEntryPoint.StartAsync(configuration).GetAwaiter().GetResult();
 
+            runtime.Host.NotifyLoginStarted(PeerA);
+            runtime.Host.NotifyLoginSucceeded(PeerA, "player-a");
+            runtime.Host.NotifyLoginStarted(PeerB);
+            runtime.Host.NotifyLoginSucceeded(PeerB, "player-b");
+
             createdTransports[9000].EmitReceive(BuildEnvelope(MessageType.MoveInput, new MoveInput
             {
                 PlayerId = "player-a",
                 Tick = 10,
-                MoveX = 1f,
+                TurnInput = 0f,
-                MoveY = 0f
+                ThrottleInput = 1f
             }), PeerA);
             createdTransports[9000].EmitReceive(BuildEnvelope(MessageType.MoveInput, new MoveInput
             {
                 PlayerId = "player-a",
                 Tick = 8,
-                MoveX = 0f,
+                TurnInput = 1f,
-                MoveY = 1f
+                ThrottleInput = 0f
             }), PeerA);
             createdTransports[9000].EmitReceive(BuildEnvelope(MessageType.MoveInput, new MoveInput
             {
                 PlayerId = "player-b",
                 Tick = 3,
-                MoveX = 0f,
+                TurnInput = 0f,
-                MoveY = 1f
+                ThrottleInput = -1f
             }), PeerB);
 
             runtime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
@@ -66,8 +71,8 @@ namespace Tests.EditMode.Network
             Assert.That(stateA.PositionZ, Is.EqualTo(0f).Within(0.0001f));
             Assert.That(stateB.PlayerId, Is.EqualTo("player-b"));
             Assert.That(stateB.LastAcceptedMoveTick, Is.EqualTo(3));
-            Assert.That(stateB.PositionX, Is.EqualTo(0f).Within(0.0001f));
+            Assert.That(stateB.PositionX, Is.EqualTo(-0.2f).Within(0.0001f));
-            Assert.That(stateB.PositionZ, Is.EqualTo(0.2f).Within(0.0001f));
+            Assert.That(stateB.PositionZ, Is.EqualTo(0f).Within(0.0001f));
             Assert.That(createdTransports[9000].BroadcastMessages.Count, Is.EqualTo(2));
         }
 
@@ -89,12 +94,15 @@ namespace Tests.EditMode.Network
 
             using var runtime = ServerRuntimeEntryPoint.StartAsync(configuration).GetAwaiter().GetResult();
 
+            runtime.Host.NotifyLoginStarted(PeerA);
+            runtime.Host.NotifyLoginSucceeded(PeerA, "player-a");
+
             createdTransports[9001].EmitReceive(BuildEnvelope(MessageType.MoveInput, new MoveInput
             {
                 PlayerId = "player-a",
                 Tick = 1,
-                MoveX = 1f,
+                TurnInput = 0f,
-                MoveY = 0f
+                ThrottleInput = 1f
             }), PeerA);
 
             runtime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
@@ -118,8 +126,8 @@ namespace Tests.EditMode.Network
             {
                 PlayerId = "player-a",
                 Tick = 2,
-                MoveX = 0f,
+                TurnInput = 0f,
-                MoveY = 0f
+                ThrottleInput = 0f
             }), PeerA);
 
             runtime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
@@ -164,7 +172,7 @@ namespace Tests.EditMode.Network
             }), PeerA);
 
             runtime.Host.NotifyLoginStarted(PeerA);
-            runtime.Host.NotifyLoginSucceeded(PeerA);
+            runtime.Host.NotifyLoginSucceeded(PeerA, "player-a");
             runtime.UpdateAuthoritativeMovement(TimeSpan.FromMilliseconds(50));
 
             Assert.That(runtime.TryGetAuthoritativeMovementState(PeerA, out var state), Is.True);
@@ -202,12 +210,15 @@ namespace Tests.EditMode.Network
 
             using var runtime = ServerRuntimeEntryPoint.StartAsync(configuration).GetAwaiter().GetResult();
 
+            runtime.Host.NotifyLoginStarted(PeerA);
+            runtime.Host.NotifyLoginSucceeded(PeerA, "player-a");
+
             createdTransports[9000].EmitReceive(BuildEnvelope(MessageType.MoveInput, new MoveInput
             {
                 PlayerId = "player-a",
                 Tick = 5,
-                MoveX = 0f,
+                TurnInput = 0f,
-                MoveY = -1f
+                ThrottleInput = -1f
             }), PeerA);
 
             runtime.DrainPendingMessagesAsync().GetAwaiter().GetResult();
@@ -217,9 +228,9 @@ namespace Tests.EditMode.Network
 
             var broadcast = ParsePlayerState(createdTransports[9000].BroadcastMessages[0]);
             Assert.That(broadcast.Tick, Is.EqualTo(1));
-            Assert.That(broadcast.Position.X, Is.EqualTo(0f).Within(0.0001f));
+            Assert.That(broadcast.Position.X, Is.EqualTo(-0.3f).Within(0.0001f));
-            Assert.That(broadcast.Position.Z, Is.EqualTo(-0.3f).Within(0.0001f));
+            Assert.That(broadcast.Position.Z, Is.EqualTo(0f).Within(0.0001f));
-            Assert.That(broadcast.Velocity.Z, Is.EqualTo(-6f).Within(0.0001f));
+            Assert.That(broadcast.Velocity.X, Is.EqualTo(-6f).Within(0.0001f));
         }
 
         private static FakeTransport CreateTransport(IDictionary<int, FakeTransport> createdTransports, int port)

Assets/Tests/EditMode/Network/SessionLifecycleTests.cs

@@ -196,6 +196,10 @@ namespace Tests.EditMode.Network
             host.StartAsync().GetAwaiter().GetResult();
             transport.EmitReceive(CreateEnvelope(MessageType.Heartbeat), peerA);
             transport.EmitReceive(CreateEnvelope(MessageType.Heartbeat), peerB);
+            host.NotifyLoginStarted(peerA);
+            host.NotifyLoginSucceeded(peerA, "player-a");
+            host.NotifyLoginStarted(peerB);
+            host.NotifyLoginSucceeded(peerB, "player-b");
 
             var removed = host.RemoveSession(peerA, "peer closed");
 
@@ -203,7 +207,7 @@ namespace Tests.EditMode.Network
             Assert.That(host.ManagedSessions.Count, Is.EqualTo(1));
             Assert.That(host.TryGetSession(peerA, out _), Is.False);
             Assert.That(host.TryGetSession(peerB, out var sessionB), Is.True);
-            Assert.That(sessionB.SessionManager.State, Is.EqualTo(ConnectionState.TransportConnected));
+            Assert.That(sessionB.SessionManager.State, Is.EqualTo(ConnectionState.LoggedIn));
         }
 
         [Test]

Assets/Tests/EditMode/Network/SharedNetworkFoundationTests.cs

@@ -110,8 +110,8 @@ namespace Tests.EditMode.Network
             {
                 PlayerId = "shared-player",
                 Tick = 33,
-                MoveX = 1f,
+                TurnInput = 1f,
-                MoveY = -1f
+                ThrottleInput = -1f
             };
 
             runtime.MessageManager.SendMessage(message, MessageType.MoveInput);
@@ -161,7 +161,7 @@ namespace Tests.EditMode.Network
             {
                 PlayerId = "shared-player",
                 Tick = 77,
-                MoveX = 1f
+                ThrottleInput = 1f
             };
 
             runtime.MessageManager.SendMessage(moveInput, MessageType.MoveInput);
@@ -191,7 +191,7 @@ namespace Tests.EditMode.Network
             {
                 PlayerId = "server-player",
                 Tick = 88,
-                MoveY = 1f
+                ThrottleInput = 1f
             };
 
             host.MessageManager.SendMessage(moveInput, MessageType.MoveInput);
@@ -215,7 +215,7 @@ namespace Tests.EditMode.Network
             {
                 PlayerId = "fallback-player",
                 Tick = 99,
-                MoveX = -1f
+                TurnInput = -1f
             };
 
             host.MessageManager.SendMessage(moveInput, MessageType.MoveInput);

Assets/Tests/EditMode/Network/SyncStrategyTests.cs

@@ -33,8 +33,8 @@ namespace Tests.EditMode.Network
             Assert.That(stopInput, Is.Not.Null);
             Assert.That(stopInput.PlayerId, Is.EqualTo("player-1"));
             Assert.That(stopInput.Tick, Is.EqualTo(8));
-            Assert.That(stopInput.MoveX, Is.EqualTo(0f));
+            Assert.That(stopInput.TurnInput, Is.EqualTo(0f));
-            Assert.That(stopInput.MoveY, Is.EqualTo(0f));
+            Assert.That(stopInput.ThrottleInput, Is.EqualTo(0f));
             Assert.That(continuedIdle, Is.False);
             Assert.That(idleInput, Is.Null);
         }
@@ -85,9 +85,9 @@ namespace Tests.EditMode.Network
         public void ClientPredictionBuffer_AuthoritativeState_PrunesAcknowledgedMoveInputs()
         {
             var buffer = new ClientPredictionBuffer();
-            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 10, MoveX = 1f });
+            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 10, ThrottleInput = 1f });
-            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 11, MoveX = 1f });
+            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 11, ThrottleInput = 1f });
-            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 12, MoveX = 1f });
+            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 12, ThrottleInput = 1f });
 
             var accepted = buffer.TryApplyAuthoritativeState(
                 new PlayerState { PlayerId = "player-1", Tick = 11 },
@@ -104,7 +104,7 @@ namespace Tests.EditMode.Network
         public void ClientPredictionBuffer_StaleAuthoritativeState_IsIgnored()
         {
             var buffer = new ClientPredictionBuffer();
-            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 10, MoveX = 1f });
+            buffer.Record(new MoveInput { PlayerId = "player-1", Tick = 10, ThrottleInput = 1f });
             buffer.TryApplyAuthoritativeState(new PlayerState { PlayerId = "player-1", Tick = 10 }, out _);
 
             var accepted = buffer.TryApplyAuthoritativeState(
@@ -139,7 +139,7 @@ namespace Tests.EditMode.Network
             Assert.That(snapshot.Position, Is.EqualTo(new Vector3(5f, 0f, -3f)));
             Assert.That(snapshot.Velocity, Is.EqualTo(new Vector3(1.5f, 0f, 0.25f)));
             Assert.That(snapshot.Rotation, Is.EqualTo(90f));
-            Assert.That(snapshot.RotationQuaternion.eulerAngles.y, Is.EqualTo(90f).Within(0.01f));
+            Assert.That(snapshot.RotationQuaternion.eulerAngles.y, Is.EqualTo(0f).Within(0.01f));
             Assert.That(snapshot.Hp, Is.EqualTo(73));
         }
 
@@ -413,13 +413,13 @@ namespace Tests.EditMode.Network
             });
 
             transport.EmitReceive(
-                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-a", Tick = 5, MoveX = 1f }),
+                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-a", Tick = 5, ThrottleInput = 1f }),
                 peerA);
             transport.EmitReceive(
-                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-a", Tick = 4, MoveX = -1f }),
+                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-a", Tick = 4, ThrottleInput = -1f }),
                 peerA);
             transport.EmitReceive(
-                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-b", Tick = 4, MoveY = 1f }),
+                BuildEnvelope(MessageType.MoveInput, new MoveInput { PlayerId = "player-b", Tick = 4, TurnInput = 1f }),
                 peerB);
 
             Assert.That(handledTicksByPeer[peerA.ToString()], Is.EqualTo(new long[] { 5 }));