103 lines
3.3 KiB
C#
103 lines
3.3 KiB
C#
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using FishNet.Managing;
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using FishNet.Managing.Timing;
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using System;
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using UnityEngine;
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namespace FishNet.Connection
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{
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/// <summary>
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/// A container for a connected client used to perform actions on and gather information for the declared client.
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/// </summary>
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public partial class NetworkConnection : IEquatable<NetworkConnection>
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{
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#pragma warning disable CS0414
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#region Private.
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/// <summary>
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/// Last tick this connection sent a ping.
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/// </summary>
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private uint _lastPingTick;
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/// <summary>
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/// Number of times client has excessively sent a ping.
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/// </summary>
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private float _excessivePingCount;
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/// <summary>
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/// Ticks expected between each ping.
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/// </summary>
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private uint _requiredPingTicks;
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#endregion
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#region Const.
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/// <summary>
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/// Number of times a ping may occur excessively before server will punish connection.
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/// </summary>
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private const byte EXCESSIVE_PING_LIMIT = 10;
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#endregion
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#pragma warning restore CS0414
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/// <summary>
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/// Initializes for ping.
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/// </summary>
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private void InitializePing()
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{
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//Give the client some room for error.
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float requiredInterval = (NetworkManager.TimeManager.PingInterval * 0.85f);
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//Round down so required ticks is lower.
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_requiredPingTicks = NetworkManager.TimeManager.TimeToTicks(requiredInterval, TickRounding.RoundDown);
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}
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/// <summary>
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/// Resets PingPong values.
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/// </summary>
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private void ResetPingPong()
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{
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_excessivePingCount = 0;
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_lastPingTick = 0;
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}
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/// <summary>
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/// Called when a ping is received from this connection. Returns if can respond to ping.
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/// </summary>
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/// <returns>True to respond to ping, false to kick connection.</returns>
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internal bool CanPingPong()
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{
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/* Only check ping conditions in build. Editors are prone to pausing which can
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* improperly kick clients. */
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#if UNITY_EDITOR
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return true;
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#else
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TimeManager tm = (NetworkManager == null) ? InstanceFinder.TimeManager : NetworkManager.TimeManager;
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//Server FPS is running low, timing isn't reliable enough to kick clients.
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if (tm.LowFrameRate)
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return true;
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uint currentTick = tm.Tick;
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uint difference = (currentTick - _lastPingTick);
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_lastPingTick = currentTick;
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//Ping sent too quickly.
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if (difference < _requiredPingTicks)
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{
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_excessivePingCount += 1f;
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//Ping limit hit.
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if (_excessivePingCount >= EXCESSIVE_PING_LIMIT)
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{
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NetworkManager.LogWarning($"Kicked connectionId {ClientId} for excessive pings.");
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Disconnect(true);
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}
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//Return to not send pong back.
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return false;
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}
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//Ping isnt too fast.
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else
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{
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_excessivePingCount = UnityEngine.Mathf.Max(0f, _excessivePingCount - 0.5f);
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return true;
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}
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#endif
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}
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}
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}
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