10a69bf754
## Breaking Changes
Incoming packet registration signature has changed to:
```cs
delegate* void OnReceiveCallback(NetState state, SpanReader reader, int packetLength);
IncomingPackets.Register(int packetID, int length, bool ingame, OnReceiveCallback onReceive);
```
For example, an incoming packet handler signature would now look like this:
```cs
public static void SomeIncomingPacket(NetState state, SpanReader reader, int packetLength)
{
// Parse the data
}
```
## Summary
Updates the network Pipe class to use a mirrored memory technique. This technique involves mapping the same physical memory to two contiguous virtual memory spaces so the byte buffer appears duplicated. This allows writing to a double-sized array to wrap around without the need for the `CircularBuffer` classes.
In practice this allows us to use `Span<byte>` as if the buffer was a regular array.
### Bug Fixes
- [X] Fixes bad fixed length string parsing
58 lines
2.2 KiB
C#
58 lines
2.2 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright 2019-2023 - ModernUO Development Team *
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* Email: hi@modernuo.com *
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* File: PacketUtilities.cs *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*************************************************************************/
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using System;
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using System.Buffers;
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using System.IO;
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using System.Runtime.CompilerServices;
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namespace Server.Network;
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public static class PacketUtilities
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void WritePacketLength(this ref SpanWriter writer)
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{
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writer.Seek(1, SeekOrigin.Begin);
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writer.Write((ushort)writer.BytesWritten);
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writer.Seek(0, SeekOrigin.End);
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}
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// If LOCAL INIT is off, then stack/heap allocations have garbage data
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// Initializes the first byte (Packet ID) so it can be used as a flag.
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static Span<byte> InitializePacket(this Span<byte> buffer)
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{
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#if NO_LOCAL_INIT
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if (buffer != null)
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{
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buffer[0] = 0;
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}
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#endif
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return buffer;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static Span<byte> InitializePackets(this Span<byte> buffer, int width)
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{
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#if NO_LOCAL_INIT
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for (var i = 0; i < buffer.Length; i += width)
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{
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buffer[i] = 0;
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}
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#endif
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return buffer;
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}
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}
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