fix(network): Adds ConnectUO (#551)

- [X] Adds ability to create new protocol extension packets
- [X] Adds freeshard protocol extension support (packet 0xF1)
- [X] Adds ConnectUO support
- [X] Adds arbitrary read for `CircularBufferReader` and `SpanReader`

Projects/Server.Tests/Tests/Utility/HexStringConverterTest.cs

@@ -10,7 +10,7 @@ namespace Server.Tests
         public void TestGetBytes(string input, byte[] bytes)
         {
             Span<byte> outputBytes = stackalloc byte[input.Length / 2];
-            HexStringConverter.GetBytes(input, outputBytes);
+            input.GetBytes(outputBytes);
 
             Assert.Equal(bytes, outputBytes.ToArray());
             Assert.Equal(input, bytes.ToHexString());

Projects/Server/Buffers/CircularBufferReader.cs

@@ -374,5 +374,21 @@ namespace Server.Network
                 SeekOrigin.End   => Length + offset,
                 _                => Position + offset // Current
             };
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool Read(Span<byte> bytes)
+        {
+            if (bytes.Length < Length)
+            {
+                throw new ArgumentOutOfRangeException(nameof(bytes));
+            }
+
+            if (_first.Length > 0 && !_first.TryCopyTo(bytes))
+            {
+                return false;
+            }
+
+            return _second.Length <= 0 || _second.TryCopyTo(bytes.Slice(_first.Length));
+        }
     }
 }

Projects/Server/Buffers/SpanReader.cs

@@ -278,5 +278,16 @@ namespace System.Buffers
                 _                  => offset // Begin
             });
         }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool Read(Span<byte> bytes)
+        {
+            if (bytes.Length < Length)
+            {
+                throw new ArgumentOutOfRangeException(nameof(bytes));
+            }
+
+            return _buffer.TryCopyTo(bytes);
+        }
     }
 }

Projects/Server/Text/HexStringConverter.cs

@@ -89,7 +89,7 @@ namespace Server.Text
             return result;
         }
 
-        public static unsafe void GetBytes(string str, Span<byte> bytes)
+        public static unsafe void GetBytes(this string str, Span<byte> bytes)
         {
             fixed (char* strP = str)
             {

Projects/UOContent/Accounting/Security/PBKDF2PasswordProtection.cs

@@ -46,7 +46,7 @@ namespace Server.Accounting.Security
         public bool ValidatePassword(string encryptedPassword, string plainPassword)
         {
             Span<byte> encryptedBytes = stackalloc byte[m_OutputSize];
-            HexStringConverter.GetBytes(encryptedPassword, encryptedBytes);
+            encryptedPassword.GetBytes(encryptedBytes);
 
             var iterations = BinaryPrimitives.ReadUInt16LittleEndian(encryptedBytes.SliceToLength(2));
             var salt = encryptedBytes.Slice(2, m_SaltSize);

Projects/UOContent/Gumps/AdminGump.cs

@@ -185,7 +185,7 @@ namespace Server.Gumps
                         AddLabel(150, 270, LabelHue, Core.ScriptItems.ToString());
 
                         AddLabel(20, 290, LabelHue, "Uptime:");
-                        AddLabel(150, 290, LabelHue, FormatTimeSpan(Core.Now - Clock.ServerStart));
+                        AddLabel(150, 290, LabelHue, FormatTimeSpan(TimeSpan.FromMilliseconds(Core.TickCount)));
 
                         AddLabel(20, 310, LabelHue, "Memory:");
                         AddLabel(150, 310, LabelHue, FormatByteAmount(GC.GetTotalMemory(false)));

Projects/UOContent/Items/Skill Items/Tinkering/Clocks.cs

@@ -31,7 +31,7 @@ namespace Server.Items
 
         public static DateTime ServerStart { get; private set; }
 
-        public static void Initialize()
+        public static void Configure()
         {
             ServerStart = Core.Now;
         }

Projects/UOContent/Network/ConnectUO.cs

@@ -0,0 +1,122 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright (C) 2019-2021 - ModernUO Development Team                   *
+ * Email: hi@modernuo.com                                                *
+ * File: ConnectUO.cs                                                    *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+using System;
+using System.Buffers;
+using Server.Accounting;
+using Server.Text;
+
+namespace Server.Network
+{
+    public static class ConnectUO
+    {
+        public enum ConnectUOServerType
+        {
+            RunUO,
+            ServUO,
+            UOX3,
+            POL,
+            Sphere,
+            ModernUO
+        }
+
+        public const byte ConnectUOProtocolVersion = 0;
+        private const int _connectUOTokenLength = 32;
+        private const ConnectUOServerType _serverType = ConnectUOServerType.ModernUO;
+        private static byte[] _token;
+
+        public static void Configure()
+        {
+            var enabled = ServerConfiguration.GetOrUpdateSetting("connectuo.enabled", true);
+            var token = ServerConfiguration.GetOrUpdateSetting("connectuo.token", null);
+
+            if (enabled)
+            {
+                try
+                {
+                    if (!string.IsNullOrWhiteSpace(token))
+                    {
+                        if (token.Length != _connectUOTokenLength * 2)
+                        {
+                            throw new Exception("Invalid length for ConnectUO token");
+                        }
+
+                        _token = GC.AllocateUninitializedArray<byte>(_connectUOTokenLength);
+                        token.GetBytes(_token);
+                    }
+                }
+                catch
+                {
+                    Utility.PushColor(ConsoleColor.Red);
+                    Console.WriteLine("ConnectUO token could not be parsed");
+                    Console.WriteLine("Make sure modernuo.json is properly configured");
+                    Utility.PopColor();
+                    _token = null;
+                }
+
+                FreeshardProtocol.Register(0xC0, false, PollInfo);
+            }
+        }
+
+        public static void PollInfo(NetState ns, CircularBufferReader reader, ref int packetLength)
+        {
+            var version = reader.ReadByte();
+
+            if (_token != null)
+            {
+                unsafe {
+                    byte* tok = stackalloc byte[_token.Length];
+                    var span = new Span<byte>(tok, _token.Length);
+                    reader.Read(span);
+
+                    if (!span.SequenceEqual(_token))
+                    {
+                        ns.Disconnect("Invalid token sent for ConnectUO");
+                        return;
+                    }
+                }
+            }
+
+            ns.WriteConsole($"ConnectUO (v{version}) is requesting stats.");
+            if (version > ConnectUOProtocolVersion)
+            {
+                Utility.PushColor(ConsoleColor.Yellow);
+                ns.WriteConsole("Warning! ConnectUO (v{version}) is newer than what is supported.");
+                Utility.PopColor();
+            }
+
+            ns.SendServerPollInfo();
+        }
+
+        public static void SendServerPollInfo(this NetState ns)
+        {
+            if (ns == null)
+            {
+                return;
+            }
+
+            var writer = new SpanWriter(stackalloc byte[15]);
+            writer.Write((byte)0xC0); // Packet ID
+            writer.Write(17); // Length
+            writer.Write(ConnectUOProtocolVersion); // Version
+            writer.Write((byte)_serverType);
+            writer.Write((int)(Core.TickCount / 1000));
+            writer.Write(Accounts.Count);            // Shame if you modify this!
+            writer.Write(TcpServer.Instances.Count); // Shame if you modify this!
+
+            ns.Send(writer.Span);
+        }
+    }
+}

Projects/UOContent/Network/FreeshardProtocol.cs

@@ -0,0 +1,31 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright (C) 2019-2021 - ModernUO Development Team                   *
+ * Email: hi@modernuo.com                                                *
+ * File: FreeshardProtocol.cs                                            *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+namespace Server.Network
+{
+    public static class FreeshardProtocol
+    {
+        private static PacketHandler[] _handlers;
+
+        [CallPriority(10)]
+        public static void Configure()
+        {
+            _handlers = ProtocolExtensions.Register(0xF1);
+        }
+
+        public static void Register(int cmd, bool ingame, OnPacketReceive onReceive) =>
+            _handlers[cmd] = new PacketHandler(cmd, 0, ingame, onReceive);
+    }
+}

Projects/UOContent/Network/MapUO.cs

@@ -0,0 +1,164 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright (C) 2019-2021 - ModernUO Development Team                   *
+ * Email: hi@modernuo.com                                                *
+ * File: MapUO.cs                                                        *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+using System;
+using System.Buffers;
+using System.IO;
+using Server.Engines.PartySystem;
+using Server.Guilds;
+
+namespace Server.Network
+{
+    public static class MapUO
+    {
+        private static PacketHandler[] _handlers;
+
+        public static void Configure()
+        {
+            _handlers = ProtocolExtensions.Register(0xF0);
+
+            Register(0x00, true, QueryPartyMemberLocations);
+            Register(0x01, true, QueryGuildMemberLocations);
+        }
+
+        public static void Register(int cmd, bool ingame, OnPacketReceive onReceive) =>
+            _handlers[cmd] = new PacketHandler(cmd, 0, ingame, onReceive);
+
+        public static void QueryGuildMemberLocations(NetState state, CircularBufferReader reader, ref int packetLength)
+        {
+            Mobile from = state.Mobile;
+
+            state.SendGuildMemberLocations(from, from.Guild as Guild, reader.ReadBoolean());
+        }
+
+        public static void QueryPartyMemberLocations(NetState state, CircularBufferReader reader, ref int packetLength)
+        {
+            Mobile from = state.Mobile;
+            var party = Party.Get(from);
+
+            if (party != null)
+            {
+                state.SendPartyMemberLocations(from, party);
+            }
+        }
+
+        public static void SendGuildMemberLocations(this NetState ns, Mobile from, Guild guild, bool sendLocations)
+        {
+            if (ns == null)
+            {
+                return;
+            }
+
+            var count = guild?.Members.Count ?? 0;
+            var maxLength = 9 + (count > 1 ? (count - 1) * (sendLocations ? 10 : 4) : 0);
+            var writer = new SpanWriter(stackalloc byte[maxLength]);
+            writer.Write((byte)0xF0); // Packet ID
+            writer.Seek(2, SeekOrigin.Current);
+            writer.Write((byte)0x02); // Command
+            writer.Write(count > 0 && sendLocations);
+
+            bool sendPacket = false;
+            for (var i = 0; i < count; i++)
+            {
+                var m = guild!.Members[i];
+
+                if (m?.NetState == null || m == from)
+                {
+                    continue;
+                }
+
+                if (sendLocations && Utility.InUpdateRange(from, m) && from.CanSee(m))
+                {
+                    continue;
+                }
+
+                sendPacket = true;
+                writer.Write(m.Serial);
+
+                if (sendLocations)
+                {
+                    writer.Write((short)m.X);
+                    writer.Write((short)m.Y);
+                    writer.Write((byte)(m.Map?.MapID ?? 0));
+
+                    if (m.Alive)
+                    {
+                        writer.Write((byte)(m.Hits * 100 / Math.Max(m.HitsMax, 1)));
+                    }
+                    else
+                    {
+                        writer.Write((byte)0);
+                    }
+                }
+            }
+
+            if (!sendPacket)
+            {
+                return;
+            }
+
+            writer.Write(0);
+            writer.WritePacketLength();
+            ns.Send(writer.Span);
+        }
+
+        public static void SendPartyMemberLocations(this NetState ns, Mobile from, Party party)
+        {
+            if (ns == null)
+            {
+                return;
+            }
+
+            var count = party?.Members.Count ?? 0;
+            var maxLength = 9 + (count > 1 ? (count - 1) * 9 : 0);
+            var writer = new SpanWriter(stackalloc byte[maxLength]);
+            writer.Write((byte)0xF0); // Packet ID
+            writer.Seek(2, SeekOrigin.Current);
+            writer.Write((byte)0x01); // Command
+
+            bool sendPacket = false;
+            for (var i = 0; i < count; i++)
+            {
+                var pmi = party!.Members[i];
+                Mobile mob = pmi?.Mobile;
+
+                if (mob?.NetState == null || mob == from)
+                {
+                    continue;
+                }
+
+                if (Utility.InUpdateRange(from, mob) && from.CanSee(mob))
+                {
+                    continue;
+                }
+
+                sendPacket = true;
+                writer.Write(mob.Serial);
+                writer.Write((short)mob.X);
+                writer.Write((short)mob.Y);
+                writer.Write((byte)(mob.Map?.MapID ?? 0));
+            }
+
+            if (!sendPacket)
+            {
+                return;
+            }
+
+            writer.Write(0);
+            writer.WritePacketLength();
+            ns.Send(writer.Span);
+        }
+    }
+}

Projects/UOContent/Network/ProtocolExtensions.cs

@@ -1,179 +1,54 @@
-using System;
-using System.Buffers;
-using System.IO;
-using Server.Engines.PartySystem;
-using Server.Guilds;
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright (C) 2019-2021 - ModernUO Development Team                   *
+ * Email: hi@modernuo.com                                                *
+ * File: ProtocolExtension.cs                                            *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
 
 namespace Server.Network
 {
     public static class ProtocolExtensions
     {
-        private static readonly PacketHandler[] _handlers = new PacketHandler[0x100];
-
-        public static void Configure()
+        public static PacketHandler[] Register(byte packetId)
         {
-            IncomingPackets.Register( 0xF0, 0, false, DecodeBundledPacket);
-            Register(0x00, true, QueryPartyMemberLocations);
-            Register(0x01, true, QueryGuildMemberLocations);
-        }
+            var packetHandlers = new PacketHandler[0x100];
 
-        public static void Register(int packetID, bool ingame, OnPacketReceive onReceive)
-        {
-            _handlers[packetID] = new PacketHandler(packetID, 0, ingame, onReceive);
-        }
-
-        public static PacketHandler GetHandler(int packetID) =>
-            packetID >= 0 && packetID < _handlers.Length ? _handlers[packetID] : null;
-
-        public static void DecodeBundledPacket(NetState state, CircularBufferReader reader, ref int packetLength)
-        {
-            int packetID = reader.ReadByte();
-
-            PacketHandler ph = GetHandler(packetID);
-
-            if (ph == null)
+            void DecodeBundledPacket(NetState state, CircularBufferReader reader, ref int packetLength)
             {
-                return;
-            }
+                int cmd = reader.ReadByte();
 
-            if (ph.Ingame && state.Mobile == null)
-            {
-                state.WriteConsole("Sent in-game packet (0xBFx{0:X2}) before having been attached to a mobile", packetID);
-                state.Disconnect("Sent in-game packet before being attached to a mobile.");
-            }
-            else if (ph.Ingame && state.Mobile.Deleted)
-            {
-                state.Disconnect(string.Empty);
-            }
-            else
-            {
-                ph.OnReceive(state, reader, ref packetLength);
-            }
-        }
+                PacketHandler ph = cmd >= 0 && cmd < packetHandlers.Length ? packetHandlers[cmd] : null;
 
-        public static void QueryGuildMemberLocations(NetState state, CircularBufferReader reader, ref int packetLength)
-        {
-            Mobile from = state.Mobile;
-
-            state.SendGuildMemberLocations(from, from.Guild as Guild, reader.ReadBoolean());
-        }
-
-        public static void QueryPartyMemberLocations(NetState state, CircularBufferReader reader, ref int packetLength)
-        {
-            Mobile from = state.Mobile;
-            var party = Party.Get(from);
-
-            if (party != null)
-            {
-                state.SendPartyMemberLocations(from, party);
-            }
-        }
-
-        public static void SendGuildMemberLocations(this NetState ns, Mobile from, Guild guild, bool sendLocations)
-        {
-            if (ns == null)
-            {
-                return;
-            }
-
-            var count = guild?.Members.Count ?? 0;
-            var maxLength = 9 + (count > 1 ? (count - 1) * (sendLocations ? 10 : 4) : 0);
-            var writer = new SpanWriter(stackalloc byte[maxLength]);
-            writer.Write((byte)0xF0); // Packet ID
-            writer.Seek(2, SeekOrigin.Current);
-            writer.Write((byte)0x02); // Command
-            writer.Write(count > 0 && sendLocations);
-
-            bool sendPacket = false;
-            for (var i = 0; i < count; i++)
-            {
-                var m = guild!.Members[i];
-
-                if (m?.NetState == null || m == from)
+                if (ph == null)
                 {
-                    continue;
+                    return;
                 }
 
-                if (sendLocations && Utility.InUpdateRange(from, m) && from.CanSee(m))
+                if (ph.Ingame && state.Mobile == null)
                 {
-                    continue;
+                    state.WriteConsole("Sent in-game packet (0x{0:X2}x{1:X2}) before having been attached to a mobile", packetId, cmd);
+                    state.Disconnect("Sent in-game packet before being attached to a mobile.");
                 }
-
-                sendPacket = true;
-                writer.Write(m.Serial);
-
-                if (sendLocations)
+                else if (ph.Ingame && state.Mobile.Deleted)
                 {
-                    writer.Write((short)m.X);
-                    writer.Write((short)m.Y);
-                    writer.Write((byte)(m.Map?.MapID ?? 0));
-
-                    if (m.Alive)
-                    {
-                        writer.Write((byte)(m.Hits * 100 / Math.Max(m.HitsMax, 1)));
-                    }
-                    else
-                    {
-                        writer.Write((byte)0);
-                    }
+                    state.Disconnect(string.Empty);
+                }
+                else
+                {
+                    ph.OnReceive(state, reader, ref packetLength);
                 }
             }
 
-            if (!sendPacket)
-            {
-                return;
-            }
-
-            writer.Write(0);
-            writer.WritePacketLength();
-            ns.Send(writer.Span);
-        }
-
-        public static void SendPartyMemberLocations(this NetState ns, Mobile from, Party party)
-        {
-            if (ns == null)
-            {
-                return;
-            }
-
-            var count = party?.Members.Count ?? 0;
-            var maxLength = 9 + (count > 1 ? (count - 1) * 9 : 0);
-            var writer = new SpanWriter(stackalloc byte[maxLength]);
-            writer.Write((byte)0xF0); // Packet ID
-            writer.Seek(2, SeekOrigin.Current);
-            writer.Write((byte)0x01); // Command
-
-            bool sendPacket = false;
-            for (var i = 0; i < count; i++)
-            {
-                var pmi = party!.Members[i];
-                Mobile mob = pmi?.Mobile;
-
-                if (mob?.NetState == null || mob == from)
-                {
-                    continue;
-                }
-
-                if (Utility.InUpdateRange(from, mob) && from.CanSee(mob))
-                {
-                    continue;
-                }
-
-                sendPacket = true;
-                writer.Write(mob.Serial);
-                writer.Write((short)mob.X);
-                writer.Write((short)mob.Y);
-                writer.Write((byte)(mob.Map?.MapID ?? 0));
-            }
-
-            if (!sendPacket)
-            {
-                return;
-            }
-
-            writer.Write(0);
-            writer.WritePacketLength();
-            ns.Send(writer.Span);
+            IncomingPackets.Register(packetId, 0, false, DecodeBundledPacket);
+            return packetHandlers;
         }
     }
 }