feat: Upgrades networking to use io_uring. (#2315)

> [!IMPORTANT]
> **Breaking Changes**
> - DecodePacket and EncodePacket delegates replaced with IClientEncryption interface
> - NetState.Connection (Socket) replaced with internal RingSocket management
> - NetState.RecvPipe and NetState.SendPipe removed (buffers managed internally)

## Summary

Upgrades the networking stack from PollGroup-based I/O to io_uring, significantly improving I/O performance on Linux.
This also adds native client encryption support for encrypted UO clients.

## Major Changes

io_uring Networking Architecture
- Replaced PollGroup with IORingGroup for async socket I/O operations
- Removed Pipe.cs (mirrored ring buffer) and TcpServer.cs in favor of RingSocketManager
- Added NetState.Network.cs - centralized network infrastructure handling accept, recv, send, and disconnect
completions
- Added SocketHelper.cs - platform-specific socket utilities for raw socket handle operations (getpeername,
getsockname)
- Buffer management now handled by RingSocketManager with configurable slab allocation

### Client Encryption Support
- Added full encryption stack in Network/Encryption/:
  - EncryptionConfig.cs - configurable encryption modes (None, Unencrypted, Encrypted, Both)
  - EncryptionManager.cs - encryption detection and initialization for login/game packets
  - LoginEncryption.cs - handles login packet encryption with version-derived keys
  - GameEncryption.cs - handles game server encryption using Twofish
  - TwofishEngine.cs - optimized Twofish block cipher implementation
  - LoginKeys.cs - encryption key table for client versions
  - IClientEncryption.cs - interface for client encryption implementations

### NetState Improvements
- Replaced Socket Connection with RingSocket _socket for managed socket lifecycle
- Changed from GCHandle polling to event-based completion processing
- Disconnect handling now properly waits for pending sends to flush
- Simplified connecting socket management using lazy queue removal

### Configuration
- New settings: network.encryptionMode and network.encryptionDebug
- Encryption mode flags: Unencrypted, Encrypted, or Both

### Dependencies
- Replaced PollGroup NuGet package with IORingGroup
- Linux requires liburing-dev / liburing-devel package

### Test plan

- Verify server starts and accepts connections on Linux with io_uring
- Verify server starts and accepts connections on Windows (fallback to IOCP)
- Test unencrypted client connections (ClassicUO with encryption disabled)
- Test encrypted client connections if available
- Verify graceful disconnect flushes pending data
- Confirm CI builds pass on all target platforms

Projects/Server.Tests/Tests/Network/Packets/Outgoing/AccountPacketTests.cs

@@ -92,7 +92,7 @@ public class AccountPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendChangeCharacter(account);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -105,7 +105,7 @@ public class AccountPacketTests
 
         ns.SendClientVersionRequest();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -117,7 +117,7 @@ public class AccountPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendCharacterDeleteResult(DeleteResultType.BadRequest);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -129,7 +129,7 @@ public class AccountPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendPopupMessage(PMMessage.LoginSyncError);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -156,7 +156,7 @@ public class AccountPacketTests
         var expected = new SupportedFeatures(ns).Compile();
         ns.SendSupportedFeature();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -177,7 +177,7 @@ public class AccountPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendLoginConfirmation(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -189,7 +189,7 @@ public class AccountPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendLoginComplete();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -214,7 +214,7 @@ public class AccountPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendCharacterListUpdate(account);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -248,7 +248,7 @@ public class AccountPacketTests
 
         ns.SendCharacterList();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -281,7 +281,7 @@ public class AccountPacketTests
 
         ns.SendCharacterList();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -294,7 +294,7 @@ public class AccountPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendAccountLoginRejected(reason);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -313,7 +313,7 @@ public class AccountPacketTests
 
         ns.SendAccountLoginAck();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -321,7 +321,7 @@ public class AccountPacketTests
     public void TestPlayServerAck()
     {
         var si = new ServerInfo("Test Server", 0, TimeZoneInfo.Local, IPEndPoint.Parse("127.0.0.1"));
-        var authId = 0x123456;
+        const int authId = 0x123456;
 
         var expected = new PlayServerAck(si, authId).Compile();
 
@@ -329,7 +329,7 @@ public class AccountPacketTests
 
         ns.SendPlayServerAck(si, authId);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/CombatPacketTests.cs

@@ -17,7 +17,7 @@ public class CombatPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSwing(attacker, defender);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -29,7 +29,7 @@ public class CombatPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSetWarMode(warmode);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -43,7 +43,7 @@ public class CombatPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendChangeCombatant(serial);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/ContainerPacketTests.cs

@@ -7,7 +7,6 @@ namespace Server.Tests.Network;
 [Collection("Sequential Server Tests")]
 public class ContainerPacketTests
 {
-
     [Fact]
     public void TestContainerDisplay()
     {
@@ -19,7 +18,7 @@ public class ContainerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplayContainer(serial, gumpId);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -35,7 +34,7 @@ public class ContainerPacketTests
         ns.ProtocolChanges = ns.ProtocolChanges | ProtocolChanges.ContainerGridLines | ProtocolChanges.HighSeas;
         ns.SendDisplayContainer(serial, gumpId);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -49,7 +48,7 @@ public class ContainerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplaySpellbook(serial);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -64,7 +63,7 @@ public class ContainerPacketTests
         ns.ProtocolChanges = ns.ProtocolChanges | ProtocolChanges.ContainerGridLines | ProtocolChanges.HighSeas;
         ns.SendDisplaySpellbook(serial);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -85,7 +84,7 @@ public class ContainerPacketTests
         ns.SendSpellbookContent(serial, graphic, offset, content);
         ObjectPropertyList.Enabled = opl;
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -102,7 +101,7 @@ public class ContainerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSpellbookContent(serial, graphic, offset, content);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -120,7 +119,7 @@ public class ContainerPacketTests
         ns.ProtocolChanges |= ProtocolChanges.ContainerGridLines;
         ns.SendSpellbookContent(serial, graphic, offset, content);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -135,7 +134,7 @@ public class ContainerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendContainerContentUpdate(item);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -151,7 +150,7 @@ public class ContainerPacketTests
         ns.ProtocolChanges |= ProtocolChanges.ContainerGridLines;
         ns.SendContainerContentUpdate(item);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -172,7 +171,7 @@ public class ContainerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendContainerContent(m, cont);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -194,7 +193,7 @@ public class ContainerPacketTests
         ns.ProtocolChanges |= ProtocolChanges.ContainerGridLines;
         ns.SendContainerContent(m, cont);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/DamagePacketTests.cs

@@ -16,7 +16,7 @@ public class DamagePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDamage(serial, inputAmount);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -32,7 +32,7 @@ public class DamagePacketTests
 
         ns.SendDamage(serial, inputAmount);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/EffectPacketTests.cs

@@ -17,7 +17,7 @@ public class EffectPackets
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSoundEffect(soundID, p);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -99,7 +99,7 @@ public class EffectPackets
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendScreenEffect(screenType);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 

Projects/Server.Tests/Tests/Network/Packets/Outgoing/EquipmentPacketTests.cs

@@ -42,7 +42,7 @@ public class EquipmentPacketTests
             new List<EquipInfoAttribute>(info.Attributes)
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -59,7 +59,7 @@ public class EquipmentPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendEquipUpdate(item);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/GumpPacketTests.cs

@@ -15,7 +15,7 @@ public class GumpPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendCloseGump(typeId, buttonId);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -32,7 +32,7 @@ public class GumpPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplaySignGump(gumpSerial, gumpId, unknownString, caption);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -46,7 +46,7 @@ public class GumpPacketTests
         var expected = gump.Compile(ns).Compile();
         ns.SendGump(gump);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -65,7 +65,7 @@ public class GumpPacketTests
         var expected = gump.Compile(ns).Compile();
         ns.SendGump(gump);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/ItemPacketTests.cs

@@ -38,7 +38,7 @@ public class ItemPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendWorldItem(item);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -74,7 +74,7 @@ public class ItemPacketTests
         ns.ProtocolChanges = ProtocolChanges.StygianAbyss;
         ns.SendWorldItem(item);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -110,7 +110,7 @@ public class ItemPacketTests
         ns.ProtocolChanges = ProtocolChanges.StygianAbyss | ProtocolChanges.HighSeas;
         ns.SendWorldItem(item);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/LightPacketTests.cs

@@ -15,7 +15,7 @@ public class LightPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendGlobalLightLevel(lightLevel);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -29,7 +29,7 @@ public class LightPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendPersonalLightLevel(serial, lightLevel);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/MapPacketTests.cs

@@ -15,7 +15,7 @@ public class MapPatchesTests
 
         ns.SendMapPatches();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -27,7 +27,7 @@ public class MapPatchesTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendInvalidMap();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -42,7 +42,7 @@ public class MapPatchesTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMapChange(map);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/MenuPacketTests.cs

@@ -47,7 +47,7 @@ public class MenuPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplayItemListMenu(menu);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -67,7 +67,7 @@ public class MenuPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplayQuestionMenu(menu);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -95,7 +95,7 @@ public class MenuPacketTests
 
         ns.SendDisplayContextMenu(menu);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/MessagePacketTests.cs

@@ -42,7 +42,7 @@ public class MessageTests
             args
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -87,7 +87,7 @@ public class MessageTests
             args
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -125,7 +125,7 @@ public class MessageTests
             text
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -165,7 +165,7 @@ public class MessageTests
             text
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -180,7 +180,7 @@ public class MessageTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendFollowMessage(serial, serial2);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -195,7 +195,7 @@ public class MessageTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendHelpResponse(s, text);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -215,9 +215,8 @@ public class MessageTests
             using var ns = PacketTestUtilities.CreateTestNetState();
             ns.SendPrompt(prompt);
 
-            var result = ns.SendPipe.Reader.AvailableToRead();
+            var result = ns.SendBuffer.GetReadSpan();
             AssertThat.Equal(result, expected);
-
         }
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/MobilePacketTests.cs

@@ -17,7 +17,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDeathAnimation(killed, corpse);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -32,7 +32,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendBondedStatus(petSerial, bonded);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -52,7 +52,7 @@ public class MobilePacketTests
 
         ns.SendMobileMoving(m, noto);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -70,7 +70,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileName(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -102,7 +102,7 @@ public class MobilePacketTests
             delay
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -128,7 +128,7 @@ public class MobilePacketTests
             delay
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -148,7 +148,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileHealthbar(m, Healthbar.Poison);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -169,7 +169,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileHealthbar(m, Healthbar.Yellow);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -192,7 +192,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileStatusCompact(m, canBeRenamed);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -225,7 +225,7 @@ public class MobilePacketTests
         var expected = new MobileStatus(beholder, beheld, ns).Compile();
         ns.SendMobileStatus(beholder, beheld);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -263,7 +263,7 @@ public class MobilePacketTests
         var expected = new MobileStatusExtended(m, ns).Compile();
         ns.SendMobileStatus(m, m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
         Core.Expansion = oldExpansion;
         expansionInfo.MobileStatusVersion = oldVersion;
@@ -284,7 +284,7 @@ public class MobilePacketTests
         var expected = new MobileUpdate(m, ns.StygianAbyss).Compile();
         ns.SendMobileUpdate(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -339,7 +339,7 @@ public class MobilePacketTests
         var expected = new MobileIncoming(ns, beholder, beheld).Compile();
         ns.SendMobileIncoming(beholder, beheld);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -356,7 +356,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileHits(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -373,7 +373,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileHits(m, true);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -390,7 +390,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileMana(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -407,7 +407,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileMana(m, true);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -424,7 +424,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileStam(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -441,7 +441,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileStam(m, true);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -462,7 +462,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileAttributes(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -483,7 +483,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMobileAttributes(m, true);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -496,7 +496,7 @@ public class MobilePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendRemoveEntity(e);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/MovementPacketTests.cs

@@ -17,7 +17,7 @@ public class MovementPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSpeedControl((SpeedControlSetting)speedControl);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -30,7 +30,7 @@ public class MovementPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMovePlayer(d);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -47,7 +47,7 @@ public class MovementPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMovementRej(seq, m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -64,7 +64,7 @@ public class MovementPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMovementAck(seq, m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/PlayerPacketTests.cs

@@ -23,7 +23,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendStatLockInfo(m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -38,7 +38,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendChangeUpdateRange((byte)range);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -50,7 +50,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDeathStatus();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -64,7 +64,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplayProfile((Serial)serial, header, body, footer);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -78,7 +78,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendLiftReject(reason);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -90,7 +90,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendLogoutAck();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -105,7 +105,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendWeather((byte)type, (byte)density, (byte)temp);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -120,7 +120,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendServerChange(p, map);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -135,7 +135,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSequence(num);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -151,7 +151,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendLaunchBrowser(uri);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -175,7 +175,7 @@ public class PlayerPacketTests
             itemId, hue, amount
         );
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -189,7 +189,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSeasonChange((byte)season, playSound);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -204,7 +204,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplayPaperdoll((Serial)m, title, warmode, canLift);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -219,7 +219,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendPlayMusic(music);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -233,7 +233,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendScrollMessage(type, tip ,text);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -247,7 +247,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendCurrentTime(date);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -261,7 +261,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendPathfindMessage(p);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -276,7 +276,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendPingAck(ping);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -291,7 +291,7 @@ public class PlayerPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplayHuePicker(huePicker.Serial, huePicker.ItemID);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/SecureTradePacketTests.cs

@@ -23,7 +23,7 @@ public class SecureTradePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendDisplaySecureTrade(m, firstCont, secondCont, name);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -37,7 +37,7 @@ public class SecureTradePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendCloseSecureTrade(cont);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -55,7 +55,7 @@ public class SecureTradePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendUpdateSecureTrade(cont, first, second);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -70,7 +70,7 @@ public class SecureTradePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendUpdateSecureTrade(cont, flag, gold, plat);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -88,7 +88,7 @@ public class SecureTradePacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendSecureTradeEquip(itemInCont, m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -108,7 +108,7 @@ public class SecureTradePacketTests
 
         ns.SendSecureTradeEquip(itemInCont, m);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/TargetPacketsTests.cs

@@ -44,7 +44,7 @@ public class TargetPacketsTests
         ns.ProtocolChanges |= ProtocolChanges.HighSeas;
         ns.SendMultiTargetReq(t);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -60,7 +60,7 @@ public class TargetPacketsTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendMultiTargetReq(t);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -71,7 +71,7 @@ public class TargetPacketsTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendCancelTarget();
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -84,7 +84,7 @@ public class TargetPacketsTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendTargetReq(t);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/VendorBuyPacketTests.cs

@@ -29,7 +29,7 @@ public class VendorBuyPacketTests
 
         ns.SendVendorBuyContent(buyStates);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -48,7 +48,7 @@ public class VendorBuyPacketTests
 
         ns.SendDisplayBuyList(vendor.Serial);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -72,7 +72,7 @@ public class VendorBuyPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendVendorBuyList(vendor, buyStates);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -87,7 +87,7 @@ public class VendorBuyPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendEndVendorBuy(vendor.Serial);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/VendorSellPacketTests.cs

@@ -30,7 +30,7 @@ public class VendorSellPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendVendorSellList(vendor.Serial, sellStates);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -45,7 +45,7 @@ public class VendorSellPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendEndVendorSell(vendor.Serial);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }

Projects/Server.Tests/Tests/Network/Packets/Outgoing/VirtualHairPacketTests.cs

@@ -20,7 +20,7 @@ public class VirtualHairPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendHairEquipUpdatePacket(m, (uint)m.Hair.VirtualSerial, m.Hair.ItemId, m.Hair.Hue, Layer.Hair);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 
@@ -35,7 +35,7 @@ public class VirtualHairPacketTests
         using var ns = PacketTestUtilities.CreateTestNetState();
         ns.SendRemoveHairPacket((uint) m.Hair.VirtualSerial);
 
-        var result = ns.SendPipe.Reader.AvailableToRead();
+        var result = ns.SendBuffer.GetReadSpan();
         AssertThat.Equal(result, expected);
     }
 }