ModernUO/Projects/UOContent/Network/ProtocolExtensions.cs
Kamron Batman 58b907d39e
fix: Fixes packet length checks (#953)
Fixes an issue with DropReq where an old client was sending in 14 bytes, but the server was expecting 15 bytes.

To fix this we introduced a new packet handler, `ContainerGridPacketHandler` and changed the code to determine the length of the packet dynamically using `GetLength(NetState)`.

Also fixed throttling so dropped packets are properly skipped.
2022-03-04 12:32:25 -08:00

54 lines
2.3 KiB
C#

/*************************************************************************
* 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
{
public static PacketHandler[] Register(byte packetId)
{
var packetHandlers = new PacketHandler[0x100];
void DecodeBundledPacket(NetState state, CircularBufferReader reader, int packetLength)
{
int cmd = reader.ReadByte();
PacketHandler ph = packetHandlers[cmd];
if (ph == null)
{
return;
}
if (ph.Ingame && state.Mobile == null)
{
state.LogInfo("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.");
}
else if (ph.Ingame && state.Mobile.Deleted)
{
state.Disconnect(string.Empty);
}
else
{
ph.OnReceive(state, reader, packetLength);
}
}
IncomingPackets.Register(packetId, 0, false, DecodeBundledPacket);
return packetHandlers;
}
}
}