feat : 더미 플레이어 구현 / 더미클라 서비스 에코용, 더미 플레이어용 분기

ClientTester/EchoClientTester/DummyService/DummyClients.cs

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+using System.Collections.Concurrent;
+using System.Diagnostics;
+using ClientTester.Packet;
+using LiteNetLib;
+using LiteNetLib.Utils;
+using Serilog;
+
+namespace ClientTester.DummyService;
+
+public class DummyClients
+{
+    private NetManager manager;
+    private EventBasedNetListener listener;
+    private NetDataWriter? writer;
+    public NetPeer? peer;
+    public long clientId;
+
+    // seq → 송신 타임스탬프 (Stopwatch tick)
+    private ConcurrentDictionary<int, long> pendingPings = new();
+    private int seqNumber;
+    private const int MAX_PENDING_PINGS = 1000;
+
+    // info
+    private Vector3 position = new Vector3();
+    private int rotY = 0;
+    private float moveSpeed = 3.5f;
+    private float distance = 0.0f;
+    private float preTime = 0.0f;
+
+    // 이동 계산용
+    private static readonly Random random = new();
+    private readonly Stopwatch moveClock = Stopwatch.StartNew();
+    private float posX = 0f;
+    private float posZ = 0f;
+    private float dirX = 0f;
+    private float dirZ = 0f;
+
+    // 유닛 테스트용 (0 = 제한 없음)
+    public int TestCount
+    {
+        get;
+        set;
+    } = 0;
+
+    // 통계
+    public int SentCount
+    {
+        set;
+        get;
+    }
+
+    public int ReceivedCount
+    {
+        set;
+        get;
+    }
+
+    public double LastRttMs
+    {
+        set;
+        get;
+    }
+
+    public double TotalRttMs
+    {
+        set;
+        get;
+    }
+
+    public int RttCount
+    {
+        set;
+        get;
+    }
+
+    public DummyClients(long clientId, string ip, int port, string key)
+    {
+        this.clientId = clientId;
+        listener = new EventBasedNetListener();
+        manager = new NetManager(listener);
+        writer = new NetDataWriter();
+
+        listener.PeerConnectedEvent += netPeer =>
+        {
+            peer = netPeer;
+            Log.Information("[Client {ClientId:00}] 연결됨", this.clientId);
+
+            // clientID가 토큰의 hashKey라고 가정함
+            PacketHeader packetHeader = new PacketHeader();
+            packetHeader.Code = (PacketCode)1;
+            packetHeader.BodyLength = 4 + sizeof(long);
+            writer.Put(clientId);
+            peer.Send(writer, DeliveryMethod.ReliableOrdered);
+
+            // 초기화
+        };
+
+        listener.NetworkReceiveEvent += (peer, reader, channel, deliveryMethod) =>
+        {
+            short code = reader.GetShort();
+            short bodyLength = reader.GetShort();
+            string? msg = reader.GetString();
+            long sentTick;
+
+            if (msg != null && msg.StartsWith("Echo seq:") &&
+                int.TryParse(msg.Substring("Echo seq:".Length), out int seq) &&
+                pendingPings.TryRemove(seq, out sentTick))
+            {
+                double rttMs = (Stopwatch.GetTimestamp() - sentTick) * 1000.0 / Stopwatch.Frequency;
+                LastRttMs = rttMs;
+                TotalRttMs += rttMs;
+                RttCount++;
+            }
+
+            ReceivedCount++;
+
+            if (TestCount > 0 && ReceivedCount >= TestCount)
+            {
+                peer.Disconnect();
+            }
+
+            reader.Recycle();
+        };
+
+        listener.PeerDisconnectedEvent += (peer, info) =>
+        {
+            Log.Warning("[Client {ClientId:00}] 연결 끊김: {Reason}", this.clientId, info.Reason);
+            this.peer = null;
+        };
+
+        manager.Start();
+        manager.Connect(ip, port, key);
+    }
+
+    public void UpdateDummy()
+    {
+        // 델타 타임 계산 (초 단위)
+        float now = (float)moveClock.Elapsed.TotalSeconds;
+        float delta = preTime > 0f ? now - preTime : 0.1f;
+        preTime = now;
+
+        // 남은 거리가 없으면 새 방향·목표 거리 설정
+        if (distance <= 0f)
+        {
+            // 현재 각도에서 -30~+30도 범위로 회전
+            rotY = (rotY + random.Next(-30, 31) + 360) % 360;
+            float rad = rotY * MathF.PI / 180f;
+            dirX = MathF.Sin(rad);
+            dirZ = MathF.Cos(rad);
+
+            // 3초~12초에 도달할 수 있는 거리 = moveSpeed × 랜덤 초
+            float seconds = 3f + (float)random.NextDouble() * 9f;
+            distance = moveSpeed * seconds;
+        }
+
+        // 이번 틱 이동량 (남은 거리 초과 방지)
+        float step = MathF.Min(moveSpeed * delta, distance);
+        posX += dirX * step;
+        posZ += dirZ * step;
+        distance -= step;
+
+        // 정수 Vector3 갱신
+        position.X = (int)MathF.Round(posX);
+        position.Z = (int)MathF.Round(posZ);
+    }
+
+    public void SendTransform()
+    {
+        if (peer == null || writer == null)
+        {
+            return;
+        }
+
+        UpdateDummy();
+
+        int seq = seqNumber++;
+        pendingPings[seq] = Stopwatch.GetTimestamp();
+
+        // 응답 없는 오래된 ping 정리 (패킷 유실 시 메모리 누수 방지)
+        if (pendingPings.Count > MAX_PENDING_PINGS)
+        {
+            int cutoff = seq - MAX_PENDING_PINGS;
+            foreach (int key in pendingPings.Keys)
+            {
+                if (key < cutoff)
+                {
+                    pendingPings.TryRemove(key, out _);
+                }
+            }
+        }
+
+        PacketHeader packetHeader = new PacketHeader();
+        packetHeader.Code = 0;
+        packetHeader.BodyLength = (ushort)$"Echo seq:{seq}".Length;
+        writer.Put((short)packetHeader.Code);
+        writer.Put((short)packetHeader.BodyLength);
+        writer.Put($"Echo seq:{seq}");
+        // 순서보장 안함 HOL Blocking 제거
+        peer.Send(writer, DeliveryMethod.ReliableUnordered);
+        SentCount++;
+        writer.Reset();
+    }
+
+    public double AvgRttMs => RttCount > 0 ? TotalRttMs / RttCount : 0.0;
+
+    public void PollEvents()
+    {
+        manager.PollEvents();
+    }
+
+    public void Stop()
+    {
+        manager.Stop();
+    }
+}