71 lines
3.2 KiB
C#
71 lines
3.2 KiB
C#
using System.Collections.Generic;
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using System;
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using NeonTea.Quakeball.TeaNet.Peers;
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namespace NeonTea.Quakeball.TeaNet.Packets {
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/// <summary>Manages a single form of conversation between clients for the Peer. Don't forget to register your packets with <see cref="Protocol.RegisterPacket(Type)"/></summary>
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public abstract class Protocol {
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private Dictionary<Type, int> PacketToId = new Dictionary<Type, int>();
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private Dictionary<int, Type> IdToPacket = new Dictionary<int, Type>();
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private int PacketIdCounter;
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/// <summary>Refers to the peer it is registered to</summary>
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public Peer Peer;
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/// <summary>Unique identifier for the protocol. This should be different for every protocol.</summary>
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public abstract byte Identifier { get; }
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/// <summary>Version of the protocol, should be changed if existing packets are changed, new packets are registered or old packets are removed.</summary>
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public abstract string Version { get; }
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/// <summary>Called when the Peer receives a packet from a connection that uses this protocol</summary>
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public abstract void Receive(Connection conn, Packet packet);
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/// <summary>Called when a ConnectionStatus is changed for a connection that uses this protocol</summary>
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public abstract void ConnectionStatusChanged(ConnectionStatus oldStatus, ConnectionStatus newStatus, Connection conn);
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/// <summary>Called when a connection that uses this protocol is timed out suddenly.</summary>
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public abstract void Timeout(Connection conn);
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/// <summary>Register a packet for sending and receiving.</summary>
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public int RegisterPacket(Type t) {
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if (t.BaseType != typeof(Packet) || PacketToId.ContainsKey(t)) {
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return -1;
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}
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int id = PacketIdCounter++;
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PacketToId.Add(t, id);
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IdToPacket.Add(id, t);
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return id;
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}
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public ByteBuffer BuildMessage(Connection connection, int firstId, bool reliable) {
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ByteBuffer buffer = new ByteBuffer();
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foreach (byte b in Peer.Fingerprint) {
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buffer.Write(b);
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}
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buffer.Write(Identifier);
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if (connection.Status == ConnectionStatus.Establishing) {
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buffer.Write((byte)PacketStage.Establishing);
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buffer.Write(Version);
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} else if (connection.Status == ConnectionStatus.Closed) {
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buffer.Write((byte)PacketStage.Closed);
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} else if (connection.Status == ConnectionStatus.Rejected) {
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buffer.Write((byte)PacketStage.Rejected);
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buffer.Write((byte)connection.ClosingReason);
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} else if (connection.Status == ConnectionStatus.Ready) {
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buffer.Write((byte)PacketStage.Ready);
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buffer.Write(connection.Internal.LatestInwardReliable);
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buffer.Write(firstId);
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buffer.Write(reliable);
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}
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return buffer;
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}
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public int GetPacketTypeID(Packet packet) {
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return PacketToId[packet.GetType()];
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}
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public Type GetPacketType(int id) {
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return IdToPacket[id];
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}
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}
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} |