10a69bf754
## Breaking Changes
Incoming packet registration signature has changed to:
```cs
delegate* void OnReceiveCallback(NetState state, SpanReader reader, int packetLength);
IncomingPackets.Register(int packetID, int length, bool ingame, OnReceiveCallback onReceive);
```
For example, an incoming packet handler signature would now look like this:
```cs
public static void SomeIncomingPacket(NetState state, SpanReader reader, int packetLength)
{
// Parse the data
}
```
## Summary
Updates the network Pipe class to use a mirrored memory technique. This technique involves mapping the same physical memory to two contiguous virtual memory spaces so the byte buffer appears duplicated. This allows writing to a double-sized array to wrap around without the need for the `CircularBuffer` classes.
In practice this allows us to use `Span<byte>` as if the buffer was a regular array.
### Bug Fixes
- [X] Fixes bad fixed length string parsing
110 lines
3.6 KiB
C#
110 lines
3.6 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: IncomingVendorPackets.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.Collections.Generic;
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namespace Server.Network;
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public static class IncomingVendorPackets
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{
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public static unsafe void Configure()
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{
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IncomingPackets.Register(0x3B, 0, true, &VendorBuyReply);
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IncomingPackets.Register(0x9F, 0, true, &VendorSellReply);
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}
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public static void VendorBuyReply(NetState state, SpanReader reader, int packetLength)
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{
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var vendor = World.FindMobile((Serial)reader.ReadUInt32());
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if (vendor == null)
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{
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return;
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}
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var flag = reader.ReadByte();
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if (!vendor.Deleted && Utility.InRange(vendor.Location, state.Mobile.Location, 10) && flag == 0x02)
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{
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var msgSize = packetLength - 8; // Remaining bytes
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if (msgSize / 7 > 100)
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{
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return;
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}
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var buyList = new List<BuyItemResponse>(msgSize / 7);
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while (msgSize > 0)
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{
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var layer = reader.ReadByte();
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var serial = (Serial)reader.ReadUInt32();
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int amount = reader.ReadInt16();
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buyList.Add(new BuyItemResponse(serial, amount));
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msgSize -= 7;
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}
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if (buyList.Count <= 0 || (vendor as IVendor)?.OnBuyItems(state.Mobile, buyList) != true)
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{
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return;
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}
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}
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state.SendEndVendorBuy(vendor.Serial);
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}
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public static void VendorSellReply(NetState state, SpanReader reader, int packetLength)
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{
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var serial = (Serial)reader.ReadUInt32();
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var vendor = World.FindMobile(serial);
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if (vendor == null)
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{
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return;
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}
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if (vendor.Deleted || !Utility.InRange(vendor.Location, state.Mobile.Location, 10))
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{
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state.SendEndVendorSell(vendor.Serial);
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return;
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}
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int count = reader.ReadUInt16();
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if (count >= 100 || reader.Remaining != count * 6)
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{
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return;
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}
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var sellList = new List<SellItemResponse>(count);
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for (var i = 0; i < count; i++)
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{
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var item = World.FindItem((Serial)reader.ReadUInt32());
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int amount = reader.ReadInt16();
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if (item != null && amount > 0)
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{
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sellList.Add(new SellItemResponse(item, amount));
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}
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}
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if (sellList.Count > 0 && vendor is IVendor v && v.OnSellItems(state.Mobile, sellList))
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{
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state.SendEndVendorSell(vendor.Serial);
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}
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}
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}
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