internal void ReceivedHandshake(TimeSpan now, NetMessageType type, int offset, int payloadLength)
{
Peer.AssertIsOnLibraryThread();
switch (type)
{
case NetMessageType.Connect:
if (Status == NetConnectionStatus.ReceivedInitiation)
{
// Whee! Server full has already been checked
var(success, hail, hailLength) = ValidateHandshakeData(offset, payloadLength);
if (success)
{
if (hail != null)
{
RemoteHailMessage = Peer.CreateIncomingMessage(NetIncomingMessageType.Data);
RemoteHailMessage.SetBuffer(hail, true);
RemoteHailMessage.ByteLength = hailLength;
}
else
{
RemoteHailMessage = null;
}
if (_peerConfiguration.IsMessageTypeEnabled(NetIncomingMessageType.ConnectionApproval))
{
// ok, let's not add connection just yet
var appMsg = Peer.CreateIncomingMessage(NetIncomingMessageType.ConnectionApproval);
appMsg.ReceiveTime = now;
appMsg.SenderConnection = this;
appMsg.SenderEndPoint = RemoteEndPoint;
if (RemoteHailMessage != null)
{
appMsg.Write(RemoteHailMessage.GetBuffer().AsSpan(0, RemoteHailMessage.ByteLength));
}
SetStatus(NetConnectionStatus.RespondedAwaitingApproval);
Peer.ReleaseMessage(appMsg);
return;
}
SendConnectResponse(now, true);
}
return;
}
if (Status == NetConnectionStatus.RespondedAwaitingApproval)
{
Peer.LogWarning(new NetLogMessage(NetLogCode.IgnoringMultipleConnects, endPoint: this));
return;
}
if (Status == NetConnectionStatus.RespondedConnect)
{
// our ConnectResponse must have been lost
SendConnectResponse(now, true);
return;
}
Peer.LogDebug(NetLogMessage.FromValues(NetLogCode.UnhandledConnect, endPoint: this, value: (int)Status));
break;
case NetMessageType.ConnectResponse:
HandleConnectResponse(offset, payloadLength);
break;
case NetMessageType.ConnectionEstablished:
switch (Status)
{
case NetConnectionStatus.Connected:
// ok...
break;
case NetConnectionStatus.Disconnected:
case NetConnectionStatus.Disconnecting:
case NetConnectionStatus.None:
// too bad, almost made it
break;
case NetConnectionStatus.ReceivedInitiation:
// uh, a little premature... ignore
break;
case NetConnectionStatus.InitiatedConnect:
// weird, should have been RespondedConnect...
break;
case NetConnectionStatus.RespondedConnect:
// awesome
NetIncomingMessage msg = Peer.SetupReadHelperMessage(offset, payloadLength);
InitializeRemoteTimeOffset(msg.ReadTimeSpan());
Peer.AcceptConnection(this);
InitializePing();
SetStatus(NetConnectionStatus.Connected);
return;
}
break;
case NetMessageType.InvalidHandshake:
case NetMessageType.WrongAppIdentifier:
case NetMessageType.ConnectTimedOut:
case NetMessageType.TimedOut:
case NetMessageType.Disconnect:
NetOutgoingMessage?reason = null;
try
{
reason = Peer.CreateReadHelperOutMessage(offset, payloadLength);
}
catch
{
}
ExecuteDisconnect(reason, false);
break;
case NetMessageType.Discovery:
Peer.HandleIncomingDiscoveryRequest(now, RemoteEndPoint, offset, payloadLength);
return;
case NetMessageType.DiscoveryResponse:
Peer.HandleIncomingDiscoveryResponse(now, RemoteEndPoint, offset, payloadLength);
return;
case NetMessageType.Ping:
// silently ignore
return;
default:
Peer.LogDebug(NetLogMessage.FromValues(NetLogCode.UnhandledHandshakeMessage, value: (int)Status));
break;
}
}