| private ReceivedHandshake ( double now, NetMessageType tp, int ptr, int payloadLength ) : void | ||
| now | double | |
| tp | NetMessageType | |
| ptr | int | |
| payloadLength | int | |
| return | void | |
internal void ReceivedHandshake(double now, NetMessageType tp, int ptr, int payloadLength)
{
m_peer.VerifyNetworkThread();
byte[] hail;
switch (tp)
{
case NetMessageType.Connect:
if (m_status == NetConnectionStatus.ReceivedInitiation)
{
// Whee! Server full has already been checked
bool ok = ValidateHandshakeData(ptr, payloadLength, out hail);
if (ok)
{
if (hail != null)
{
m_remoteHailMessage = m_peer.CreateIncomingMessage(NetIncomingMessageType.Data, hail);
m_remoteHailMessage.LengthBits = (hail.Length * 8);
}
else
{
m_remoteHailMessage = null;
}
if (m_peerConfiguration.IsMessageTypeEnabled(NetIncomingMessageType.ConnectionApproval))
{
// ok, let's not add connection just yet
NetIncomingMessage appMsg = m_peer.CreateIncomingMessage(NetIncomingMessageType.ConnectionApproval, (m_remoteHailMessage == null ? 0 : m_remoteHailMessage.LengthBytes));
appMsg.m_receiveTime = now;
appMsg.m_senderConnection = this;
appMsg.m_senderEndPoint = this.m_remoteEndPoint;
if (m_remoteHailMessage != null)
appMsg.Write(m_remoteHailMessage.m_data, 0, m_remoteHailMessage.LengthBytes);
SetStatus(NetConnectionStatus.RespondedAwaitingApproval, "Awaiting approval");
m_peer.ReleaseMessage(appMsg);
return;
}
SendConnectResponse((float)now, true);
}
return;
}
if (m_status == NetConnectionStatus.RespondedAwaitingApproval)
{
m_peer.LogWarning("Ignoring multiple Connect() most likely due to a delayed Approval");
return;
}
if (m_status == NetConnectionStatus.RespondedConnect)
{
// our ConnectResponse must have been lost
SendConnectResponse((float)now, true);
return;
}
m_peer.LogDebug("Unhandled Connect: " + tp + ", status is " + m_status + " length: " + payloadLength);
break;
case NetMessageType.ConnectResponse:
HandleConnectResponse(now, tp, ptr, payloadLength);
break;
case NetMessageType.ConnectionEstablished:
switch (m_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 = m_peer.SetupReadHelperMessage(ptr, payloadLength);
InitializeRemoteTimeOffset(msg.ReadSingle());
m_peer.AcceptConnection(this);
InitializePing();
SetStatus(NetConnectionStatus.Connected, "Connected to " + NetUtility.ToHexString(m_remoteUniqueIdentifier));
return;
}
break;
case NetMessageType.Disconnect:
// ouch
string reason = "Ouch";
try
{
NetIncomingMessage inc = m_peer.SetupReadHelperMessage(ptr, payloadLength);
reason = inc.ReadString();
}
catch
{
}
ExecuteDisconnect(reason, false);
break;
case NetMessageType.Discovery:
m_peer.HandleIncomingDiscoveryRequest(now, m_remoteEndPoint, ptr, payloadLength);
return;
case NetMessageType.DiscoveryResponse:
m_peer.HandleIncomingDiscoveryResponse(now, m_remoteEndPoint, ptr, payloadLength);
return;
case NetMessageType.Ping:
// silently ignore
return;
default:
m_peer.LogDebug("Unhandled type during handshake: " + tp + " length: " + payloadLength);
break;
}
}
private void ReceivedUnconnectedLibraryMessage(double now, IPEndPoint senderEndpoint, NetMessageType tp, int ptr, int payloadByteLength)
{
NetConnection shake;
if (m_handshakes.TryGetValue(senderEndpoint, out shake))
{
shake.ReceivedHandshake(now, tp, ptr, payloadByteLength);
return;
}
//
// Library message from a completely unknown sender; lets just accept Connect
//
switch (tp)
{
case NetMessageType.Discovery:
if (m_configuration.IsMessageTypeEnabled(NetIncomingMessageType.DiscoveryRequest))
{
NetIncomingMessage dm = CreateIncomingMessage(NetIncomingMessageType.DiscoveryRequest, payloadByteLength);
if (payloadByteLength > 0)
Buffer.BlockCopy(m_receiveBuffer, ptr, dm.m_data, 0, payloadByteLength);
dm.m_receiveTime = now;
dm.m_bitLength = payloadByteLength * 8;
dm.m_senderEndpoint = senderEndpoint;
ReleaseMessage(dm);
}
return;
case NetMessageType.DiscoveryResponse:
if (m_configuration.IsMessageTypeEnabled(NetIncomingMessageType.DiscoveryResponse))
{
NetIncomingMessage dr = CreateIncomingMessage(NetIncomingMessageType.DiscoveryResponse, payloadByteLength);
if (payloadByteLength > 0)
Buffer.BlockCopy(m_receiveBuffer, ptr, dr.m_data, 0, payloadByteLength);
dr.m_receiveTime = now;
dr.m_bitLength = payloadByteLength * 8;
dr.m_senderEndpoint = senderEndpoint;
ReleaseMessage(dr);
}
return;
case NetMessageType.NatIntroduction:
HandleNatIntroduction(ptr);
return;
case NetMessageType.NatPunchMessage:
HandleNatPunch(ptr, senderEndpoint);
return;
case NetMessageType.Connect:
// proceed
break;
case NetMessageType.Disconnect:
// this is probably ok
LogVerbose("Received Disconnect from unconnected source: " + senderEndpoint);
return;
default:
LogWarning("Received unhandled library message " + tp + " from " + senderEndpoint);
return;
}
// It's someone wanting to shake hands with us!
int reservedSlots = m_handshakes.Count + m_connections.Count;
if (reservedSlots >= m_configuration.m_maximumConnections)
{
// server full
NetOutgoingMessage full = CreateMessage("Server full");
full.m_messageType = NetMessageType.Disconnect;
SendLibrary(full, senderEndpoint);
return;
}
// Ok, start handshake!
NetConnection conn = new NetConnection(this, senderEndpoint);
m_handshakes.Add(senderEndpoint, conn);
conn.ReceivedHandshake(now, tp, ptr, payloadByteLength);
return;
}
