448 lines
17 KiB
C#
448 lines
17 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Net;
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using System.Text;
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using Barotrauma.Steam;
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using System.Linq;
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using System.Threading;
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namespace Barotrauma.Networking
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{
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class SteamP2POwnerPeer : ClientPeer
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{
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private bool isActive;
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private ConnectionInitialization initializationStep;
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private UInt64 selfSteamID;
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class RemotePeer
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{
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public UInt64 SteamID;
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public double? DisconnectTime;
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public bool Authenticating;
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public bool Authenticated;
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public class UnauthedMessage
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{
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public DeliveryMethod DeliveryMethod;
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public IWriteMessage Message;
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}
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public List<UnauthedMessage> UnauthedMessages;
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public RemotePeer(UInt64 steamId)
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{
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SteamID = steamId;
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DisconnectTime = null;
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Authenticating = false;
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Authenticated = false;
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UnauthedMessages = new List<UnauthedMessage>();
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}
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}
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List<RemotePeer> remotePeers;
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public SteamP2POwnerPeer(string name)
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{
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ServerConnection = null;
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Name = name;
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isActive = false;
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selfSteamID = Steam.SteamManager.GetSteamID();
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}
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public override void Start(object endPoint, int ownerKey)
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{
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if (isActive) { return; }
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initializationStep = ConnectionInitialization.SteamTicketAndVersion;
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ServerConnection = new PipeConnection();
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ServerConnection.Status = NetworkConnectionStatus.Connected;
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remotePeers = new List<RemotePeer>();
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Steamworks.SteamNetworking.ResetActions();
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Steamworks.SteamNetworking.OnP2PSessionRequest = OnIncomingConnection;
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Steamworks.SteamUser.OnValidateAuthTicketResponse += OnAuthChange;
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isActive = true;
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}
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private void OnAuthChange(Steamworks.SteamId steamID, Steamworks.SteamId ownerID, Steamworks.AuthResponse status)
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{
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RemotePeer remotePeer = remotePeers.Find(p => p.SteamID == steamID);
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DebugConsole.Log(steamID + " validation: " + status + ", " + (remotePeer != null));
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if (remotePeer == null) { return; }
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if (remotePeer.Authenticated)
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{
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if (status != Steamworks.AuthResponse.OK)
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{
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DisconnectPeer(remotePeer, DisconnectReason.SteamAuthenticationFailed.ToString() + "/ Steam authentication status changed: " + status.ToString());
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}
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return;
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}
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if (status == Steamworks.AuthResponse.OK)
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{
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remotePeer.Authenticated = true;
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remotePeer.Authenticating = false;
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foreach (var msg in remotePeer.UnauthedMessages)
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{
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byte[] msgToSend = (byte[])msg.Message.Buffer.Clone();
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Array.Resize(ref msgToSend, msg.Message.LengthBytes);
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ChildServerRelay.Write(msgToSend);
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}
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remotePeer.UnauthedMessages.Clear();
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}
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else
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{
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DisconnectPeer(remotePeer, DisconnectReason.SteamAuthenticationFailed.ToString() + "/ Steam authentication failed: " + status.ToString());
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return;
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}
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}
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private void OnIncomingConnection(Steamworks.SteamId steamId)
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{
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if (!isActive) { return; }
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if (!remotePeers.Any(p => p.SteamID == steamId))
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{
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remotePeers.Add(new RemotePeer(steamId));
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}
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Steamworks.SteamNetworking.AcceptP2PSessionWithUser(steamId); //accept all connections, the server will figure things out later
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}
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private void OnP2PData(ulong steamId, byte[] data, int dataLength, int channel)
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{
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if (!isActive) { return; }
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RemotePeer remotePeer = remotePeers.Find(p => p.SteamID == steamId);
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if (remotePeer == null || remotePeer.DisconnectTime != null)
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{
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return;
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}
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IWriteMessage outMsg = new WriteOnlyMessage();
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outMsg.Write(steamId);
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outMsg.Write(data, 1, dataLength - 1);
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DeliveryMethod deliveryMethod = (DeliveryMethod)data[0];
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byte incByte = data[1];
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bool isCompressed = (incByte & (byte)PacketHeader.IsCompressed) != 0;
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bool isConnectionInitializationStep = (incByte & (byte)PacketHeader.IsConnectionInitializationStep) != 0;
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bool isDisconnectMessage = (incByte & (byte)PacketHeader.IsDisconnectMessage) != 0;
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bool isServerMessage = (incByte & (byte)PacketHeader.IsServerMessage) != 0;
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bool isHeartbeatMessage = (incByte & (byte)PacketHeader.IsHeartbeatMessage) != 0;
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if (!remotePeer.Authenticated)
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{
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if (!remotePeer.Authenticating)
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{
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if (isConnectionInitializationStep)
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{
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remotePeer.DisconnectTime = null;
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IReadMessage authMsg = new ReadOnlyMessage(data, isCompressed, 2, dataLength - 2, null);
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ConnectionInitialization initializationStep = (ConnectionInitialization)authMsg.ReadByte();
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//Console.WriteLine("received init step from "+steamId.ToString()+" ("+initializationStep.ToString()+")");
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if (initializationStep == ConnectionInitialization.SteamTicketAndVersion)
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{
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remotePeer.Authenticating = true;
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authMsg.ReadString(); //skip name
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authMsg.ReadUInt64(); //skip steamid
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UInt16 ticketLength = authMsg.ReadUInt16();
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byte[] ticket = authMsg.ReadBytes(ticketLength);
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Steamworks.BeginAuthResult authSessionStartState = Steam.SteamManager.StartAuthSession(ticket, steamId);
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if (authSessionStartState != Steamworks.BeginAuthResult.OK)
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{
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DisconnectPeer(remotePeer, DisconnectReason.SteamAuthenticationFailed.ToString() + "/ Steam auth session failed to start: " + authSessionStartState.ToString());
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return;
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}
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}
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}
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}
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}
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if (remotePeer.Authenticating)
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{
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remotePeer.UnauthedMessages.Add(new RemotePeer.UnauthedMessage() { DeliveryMethod = deliveryMethod, Message = outMsg });
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}
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else
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{
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byte[] msgToSend = (byte[])outMsg.Buffer.Clone();
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Array.Resize(ref msgToSend, outMsg.LengthBytes);
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ChildServerRelay.Write(msgToSend);
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}
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}
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public override void Update(float deltaTime)
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{
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if (!isActive) { return; }
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if (ChildServerRelay.HasShutDown || (ChildServerRelay.Process?.HasExited ?? true))
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{
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Close();
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var msgBox = new GUIMessageBox(TextManager.Get("ConnectionLost"), TextManager.Get("ServerProcessClosed"));
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msgBox.Buttons[0].OnClicked += (btn, obj) => { GameMain.MainMenuScreen.Select(); return false; };
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return;
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}
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for (int i = remotePeers.Count - 1; i >= 0; i--)
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{
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if (remotePeers[i].DisconnectTime != null && remotePeers[i].DisconnectTime < Timing.TotalTime)
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{
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ClosePeerSession(remotePeers[i]);
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}
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}
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for (int i=0;i<100;i++)
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{
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if (!Steamworks.SteamNetworking.IsP2PPacketAvailable()) { break; }
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var packet = Steamworks.SteamNetworking.ReadP2PPacket();
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if (packet.HasValue)
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{
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OnP2PData(packet?.SteamId ?? 0, packet?.Data, packet?.Data.Length ?? 0, 0);
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}
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}
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while (ChildServerRelay.Read(out byte[] incBuf))
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{
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ChildServerRelay.DisposeLocalHandles();
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IReadMessage inc = new ReadOnlyMessage(incBuf, false, 0, incBuf.Length, ServerConnection);
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HandleDataMessage(inc);
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}
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}
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private void HandleDataMessage(IReadMessage inc)
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{
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if (!isActive) { return; }
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UInt64 recipientSteamId = inc.ReadUInt64();
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DeliveryMethod deliveryMethod = (DeliveryMethod)inc.ReadByte();
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int p2pDataStart = inc.BytePosition;
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byte incByte = inc.ReadByte();
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bool isCompressed = (incByte & (byte)PacketHeader.IsCompressed) != 0;
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bool isConnectionInitializationStep = (incByte & (byte)PacketHeader.IsConnectionInitializationStep) != 0;
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bool isDisconnectMessage = (incByte & (byte)PacketHeader.IsDisconnectMessage) != 0;
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bool isServerMessage = (incByte & (byte)PacketHeader.IsServerMessage) != 0;
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bool isHeartbeatMessage = (incByte & (byte)PacketHeader.IsHeartbeatMessage) != 0;
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if (recipientSteamId != selfSteamID)
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{
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if (!isServerMessage)
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{
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DebugConsole.ThrowError("Received non-server message meant for remote peer");
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return;
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}
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RemotePeer peer = remotePeers.Find(p => p.SteamID == recipientSteamId);
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if (peer == null) { return; }
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if (isDisconnectMessage)
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{
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DisconnectPeer(peer, inc.ReadString());
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return;
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}
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Steamworks.P2PSend sendType;
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switch (deliveryMethod)
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{
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case DeliveryMethod.Reliable:
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case DeliveryMethod.ReliableOrdered:
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//the documentation seems to suggest that the Reliable send type
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//enforces packet order (TODO: verify)
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sendType = Steamworks.P2PSend.Reliable;
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break;
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default:
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sendType = Steamworks.P2PSend.Unreliable;
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break;
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}
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byte[] p2pData;
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if (isConnectionInitializationStep)
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{
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p2pData = new byte[inc.LengthBytes - p2pDataStart + 8];
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p2pData[0] = inc.Buffer[p2pDataStart];
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Lidgren.Network.NetBitWriter.WriteUInt64(SteamManager.CurrentLobbyID, 64, p2pData, 8);
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Array.Copy(inc.Buffer, p2pDataStart+1, p2pData, 9, inc.LengthBytes - p2pDataStart - 1);
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}
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else
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{
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p2pData = new byte[inc.LengthBytes - p2pDataStart];
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Array.Copy(inc.Buffer, p2pDataStart, p2pData, 0, p2pData.Length);
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}
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if (p2pData.Length + 4 >= MsgConstants.MTU)
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{
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DebugConsole.Log("WARNING: message length comes close to exceeding MTU, forcing reliable send (" + p2pData.Length.ToString() + " bytes)");
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sendType = Steamworks.P2PSend.Reliable;
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}
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bool successSend = Steamworks.SteamNetworking.SendP2PPacket(recipientSteamId, p2pData, p2pData.Length, 0, sendType);
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if (!successSend)
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{
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if (sendType != Steamworks.P2PSend.Reliable)
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{
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DebugConsole.Log("WARNING: message couldn't be sent unreliably, forcing reliable send (" + p2pData.Length.ToString() + " bytes)");
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sendType = Steamworks.P2PSend.Reliable;
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successSend = Steamworks.SteamNetworking.SendP2PPacket(recipientSteamId, p2pData, p2pData.Length, 0, sendType);
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}
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if (!successSend)
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{
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DebugConsole.ThrowError("Failed to send message to remote peer! (" + p2pData.Length.ToString() + " bytes)");
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}
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}
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}
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else
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{
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if (isDisconnectMessage)
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{
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DebugConsole.ThrowError("Received disconnect message from owned server");
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return;
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}
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if (!isServerMessage)
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{
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DebugConsole.ThrowError("Received non-server message from owned server");
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return;
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}
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if (isHeartbeatMessage)
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{
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return; //timeout is handled by Lidgren, ignore this message
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}
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if (isConnectionInitializationStep)
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{
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IWriteMessage outMsg = new WriteOnlyMessage();
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outMsg.Write(selfSteamID);
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outMsg.Write((byte)(PacketHeader.IsConnectionInitializationStep));
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outMsg.Write(Name);
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byte[] msgToSend = (byte[])outMsg.Buffer.Clone();
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Array.Resize(ref msgToSend, outMsg.LengthBytes);
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ChildServerRelay.Write(msgToSend);
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return;
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}
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else
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{
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if (initializationStep != ConnectionInitialization.Success)
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{
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OnInitializationComplete?.Invoke();
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initializationStep = ConnectionInitialization.Success;
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}
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UInt16 length = inc.ReadUInt16();
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IReadMessage msg = new ReadOnlyMessage(inc.Buffer, isCompressed, inc.BytePosition, length, ServerConnection);
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OnMessageReceived?.Invoke(msg);
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return;
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}
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}
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}
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private void DisconnectPeer(RemotePeer peer, string msg)
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{
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if (!string.IsNullOrWhiteSpace(msg))
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{
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if (peer.DisconnectTime == null)
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{
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peer.DisconnectTime = Timing.TotalTime + 1.0;
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}
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IWriteMessage outMsg = new WriteOnlyMessage();
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outMsg.Write((byte)(PacketHeader.IsServerMessage | PacketHeader.IsDisconnectMessage));
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outMsg.Write(msg);
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Steamworks.SteamNetworking.SendP2PPacket(peer.SteamID, outMsg.Buffer, outMsg.LengthBytes, 0, Steamworks.P2PSend.Reliable);
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}
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else
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{
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ClosePeerSession(peer);
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}
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}
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private void ClosePeerSession(RemotePeer peer)
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{
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Steamworks.SteamNetworking.CloseP2PSessionWithUser(peer.SteamID);
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remotePeers.Remove(peer);
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}
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public override void SendPassword(string password)
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{
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return; //owner doesn't send passwords
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}
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public override void Close(string msg = null)
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{
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if (!isActive) { return; }
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isActive = false;
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for (int i = remotePeers.Count - 1; i >= 0; i--)
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{
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DisconnectPeer(remotePeers[i], msg ?? DisconnectReason.ServerShutdown.ToString());
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}
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Thread.Sleep(100);
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for (int i = remotePeers.Count - 1; i >= 0; i--)
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{
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ClosePeerSession(remotePeers[i]);
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}
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ChildServerRelay.ShutDown();
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OnDisconnect?.Invoke();
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SteamManager.LeaveLobby();
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Steamworks.SteamNetworking.ResetActions();
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Steamworks.SteamUser.OnValidateAuthTicketResponse -= OnAuthChange;
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}
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public override void Send(IWriteMessage msg, DeliveryMethod deliveryMethod)
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{
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if (!isActive) { return; }
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IWriteMessage msgToSend = new WriteOnlyMessage();
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byte[] msgData = new byte[msg.LengthBytes];
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msg.PrepareForSending(ref msgData, out bool isCompressed, out int length);
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msgToSend.Write(selfSteamID);
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msgToSend.Write((byte)(isCompressed ? PacketHeader.IsCompressed : PacketHeader.None));
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msgToSend.Write((UInt16)length);
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msgToSend.Write(msgData, 0, length);
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byte[] bufToSend = (byte[])msgToSend.Buffer.Clone();
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Array.Resize(ref bufToSend, msgToSend.LengthBytes);
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ChildServerRelay.Write(bufToSend);
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}
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~SteamP2POwnerPeer()
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{
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OnDisconnect = null;
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Close();
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}
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#if DEBUG
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public override void ForceTimeOut()
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{
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//TODO: reimplement?
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}
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#endif
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}
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}
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