wisedev
fc2ac1050f
KCP gameserver with packet dispatch, scene streaming, combat, gacha and the shop, plus a small HTTP server for the login flow and the wish history page. Game data under assets is pulled out of the client instead of being typed by hand. The excel tables come from the packed bin container and the spawn points from the compiled scene scripts.
67 lines
2.2 KiB
C#
67 lines
2.2 KiB
C#
using System.Buffers.Binary;
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using Yuanshen.Protocol;
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using Google.Protobuf;
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namespace Yuanshen.Gameserver.Network;
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internal class NetPacket
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{
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private const ushort HeadMagic = 0x4567;
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private const ushort TailMagic = 0x89AB;
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public CmdType CmdType { get; set; }
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public Memory<byte> Head { get; set; }
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public Memory<byte> Body { get; set; }
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public TBody DecodeBody<TBody>() where TBody : IMessage<TBody>, new()
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{
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return new MessageParser<TBody>(() => new()).ParseFrom(Body.Span);
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}
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public int EncodeTo(Memory<byte> buffer)
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{
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Span<byte> span = buffer.Span;
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BinaryPrimitives.WriteUInt16BigEndian(span[0..2], HeadMagic);
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BinaryPrimitives.WriteUInt16BigEndian(span[2..4], (ushort)CmdType);
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BinaryPrimitives.WriteUInt16BigEndian(span[4..6], (ushort)Head.Length);
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BinaryPrimitives.WriteInt32BigEndian(span[6..10], Body.Length);
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Head.CopyTo(buffer[10..]);
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Body.CopyTo(buffer[(10 + Head.Length)..]);
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BinaryPrimitives.WriteUInt16BigEndian(span[(10 + Head.Length + Body.Length)..], TailMagic);
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return 12 + Head.Length + Body.Length;
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}
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public static (NetPacket?, int) DecodeFrom(Memory<byte> data)
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{
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ReadOnlySpan<byte> span = data.Span;
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ushort headMagic = BinaryPrimitives.ReadUInt16BigEndian(span[0..2]);
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if (headMagic != HeadMagic)
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return (null, 0);
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ushort cmdType = BinaryPrimitives.ReadUInt16BigEndian(span[2..4]);
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int headLength = BinaryPrimitives.ReadUInt16BigEndian(span[4..6]);
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int bodyLength = BinaryPrimitives.ReadInt32BigEndian(span[6..10]);
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if (data.Length < 12 + headLength + bodyLength)
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return (null, 0);
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Memory<byte> head = data.Slice(10, headLength);
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Memory<byte> body = data.Slice(10 + headLength, bodyLength);
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ushort tailMagic = BinaryPrimitives.ReadUInt16BigEndian(span[(10 + headLength + bodyLength)..]);
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if (tailMagic != TailMagic)
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return (null, 0);
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NetPacket netPacket = new()
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{
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CmdType = (CmdType)cmdType,
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Head = head,
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Body = body
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};
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return (netPacket, 12 + headLength + bodyLength);
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}
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}
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