95 lines
4.3 KiB
C#
95 lines
4.3 KiB
C#
using Lidgren.Network;
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using System;
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using System.Collections.Generic;
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namespace Barotrauma.Networking
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{
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abstract class NetEntityEventManager
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{
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public const int MaxEventBufferLength = 1024;
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public const int MaxEventsPerWrite = 64;
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/// <summary>
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/// Write the events to the outgoing message. The recipient parameter is only needed for ServerEntityEventManager
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/// </summary>
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protected void Write(NetOutgoingMessage msg, List<NetEntityEvent> eventsToSync, Client recipient = null)
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{
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//write into a temporary buffer so we can write the number of events before the actual data
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NetBuffer tempBuffer = new NetBuffer();
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int eventCount = 0;
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foreach (NetEntityEvent e in eventsToSync)
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{
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//write into a temporary buffer so we can write the length before the actual data
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NetBuffer tempEventBuffer = new NetBuffer();
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try
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{
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WriteEvent(tempEventBuffer, e, recipient);
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}
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catch (Exception exception)
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{
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DebugConsole.ThrowError("Failed to write an event for the entity \"" + e.Entity + "\"", exception);
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GameAnalyticsManager.AddErrorEventOnce("NetEntityEventManager.Write:WriteFailed" + e.Entity.ToString(),
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GameAnalyticsSDK.Net.EGAErrorSeverity.Error,
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"Failed to write an event for the entity \"" + e.Entity + "\"\n" + exception.StackTrace);
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//write an empty event to avoid messing up IDs
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//(otherwise the clients might read the next event in the message and think its ID
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//is consecutive to the previous one, even though we skipped over this broken event)
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tempBuffer.Write(Entity.NullEntityID);
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tempBuffer.WritePadBits();
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eventCount++;
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continue;
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}
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if (msg.LengthBytes + tempBuffer.LengthBytes + tempEventBuffer.LengthBytes > NetPeerConfiguration.kDefaultMTU - 20)
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{
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//no more room in this packet
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break;
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}
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if (tempEventBuffer.LengthBytes > 255)
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{
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DebugConsole.ThrowError("Too much data in network event for entity \"" + e.Entity.ToString() + "\" (" + tempEventBuffer.LengthBytes + " bytes");
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GameAnalyticsManager.AddErrorEventOnce("NetEntityEventManager.Write:TooLong" + e.Entity.ToString(),
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GameAnalyticsSDK.Net.EGAErrorSeverity.Error,
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"Too much data in network event for entity \"" + e.Entity.ToString() + "\" (" + tempEventBuffer.LengthBytes + " bytes");
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//write an empty event to prevent breaking the event syncing
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tempBuffer.Write((UInt16)0);
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tempBuffer.WritePadBits();
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eventCount++;
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continue;
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}
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//the ID has been taken by another entity (the original entity has been removed) -> write an empty event
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/*else if (Entity.FindEntityByID(e.Entity.ID) != e.Entity || e.Entity.IdFreed)
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{
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//technically the clients don't have any use for these, but removing events and shifting the IDs of all
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//consecutive ones is so error-prone that I think this is a safer option
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tempBuffer.Write(Entity.NullEntityID);
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tempBuffer.WritePadBits();
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}*/
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else
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{
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tempBuffer.Write((UInt16)e.Entity.ID);
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tempBuffer.Write((byte)tempEventBuffer.LengthBytes);
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tempBuffer.Write(tempEventBuffer);
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tempBuffer.WritePadBits();
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}
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eventCount++;
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}
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if (eventCount > 0)
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{
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msg.Write(eventsToSync[0].ID);
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msg.Write((byte)eventCount);
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msg.Write(tempBuffer);
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}
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}
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protected abstract void WriteEvent(NetBuffer buffer, NetEntityEvent entityEvent, Client recipient = null);
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}
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}
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