mirror of
https://github.com/modernuo/ModernUO
synced 2026-08-11 22:23:06 -04:00
6f444488a5
### Summary - Fixes various exploits that can crash the shard when the client misbehaves. - Clients will now be disconnected if they send packets that are marked as out of game only (new flag), while they are in-game. > [!Note] > **Developer Note** > Added an `OutOfGameOnly` which should be used to flag packets as only available out of the game. > This is the opposite of, yet not the converse to `InGameOnly`.
102 lines
4 KiB
C#
102 lines
4 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: IncomingPackets.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.Buffers;
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using System.Runtime.CompilerServices;
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namespace Server.Network;
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public static class IncomingPackets
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{
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private static readonly EncodedPacketHandler[] _encodedHandlers = new EncodedPacketHandler[0x100];
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public static PacketHandler[] Handlers { get; } = new PacketHandler[0x100];
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe void Register(
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int packetID, delegate*<NetState, SpanReader, void> onReceive, int length = 0, bool ingameOnly = false,
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bool outgameOnly = false
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) => Register(packetID, length, ingameOnly, outgameOnly, onReceive);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe void Register(
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int packetID, int length, bool ingame, delegate*<NetState, SpanReader, void> onReceive
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) => Register(packetID, length, ingame, false, onReceive);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe void Register(
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int packetID, int length, bool ingame, bool outgame, delegate*<NetState, SpanReader, void> onReceive
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) => Register(new PacketHandler(packetID, length, ingame, outgame, onReceive));
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public static void Register(PacketHandler packetHandler)
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{
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Handlers[packetHandler.PacketID] = packetHandler;
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}
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public static PacketHandler GetHandler(int packetID) => Handlers[packetID];
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public static unsafe void RegisterEncoded(
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int packetID, bool ingame, delegate*<NetState, IEntity, EncodedReader, void> onReceive
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)
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{
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if (packetID is >= 0 and < 0x100)
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{
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_encodedHandlers[packetID] = new EncodedPacketHandler(packetID, ingame, onReceive);
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}
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}
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public static EncodedPacketHandler GetEncodedHandler(int packetID) =>
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packetID is >= 0 and < 0x100 ? _encodedHandlers[packetID] : null;
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public static void RemoveEncodedHandler(int packetID)
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{
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if (packetID is >= 0 and < 0x100)
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{
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_encodedHandlers[packetID] = null;
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}
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}
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public static unsafe void RegisterThrottler(int packetID, delegate*<int, NetState, bool> t)
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{
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var ph = GetHandler(packetID);
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if (ph != null)
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{
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ph.ThrottleCallback = t;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool IsInfoPacket(byte packetId)
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{
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// These packets can arrive at any time during the login process. They're just informational.
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return packetId switch
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{
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0x01 => true, // Disconnect
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0x73 => true, // Ping
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0xA4 => true, // SystemInfo
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0xB1 => true, // Gump Response
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0xBB => true, // Account ID
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0xBD => true, // Client Version
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0xBE => true, // Assist Version
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0xD9 => true, // Hardware Info
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0xDD => true, // Gumps (Packed)
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0xE1 => true, // Client Type
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0xF1 => true, // Freeshard Protocol
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0xF4 => true, // CrashReport
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_ => false
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};
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}
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}
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