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fix(network): Adds ConnectUO (#551)

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- [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`
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Kamron Batman 2021-03-15 14:14:33 -07:00 • committed by GitHub
parent 76970325a3
commit 5e3b42bf9c
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11 changed files with 381 additions and 162 deletions
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189
Projects/UOContent/Network/ProtocolExtensions.cs
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@ -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;
}
}
}