// received a library message while Connected
internal void ReceivedLibraryMessage(NetMessageType tp, int ptr, int payloadLength)
{
m_peer.VerifyNetworkThread();
float now = (float)NetTime.Now;
switch (tp)
{
case NetMessageType.Disconnect:
NetIncomingMessage msg = m_peer.SetupReadHelperMessage(ptr, payloadLength);
ExecuteDisconnect(msg.ReadString(), false);
break;
case NetMessageType.Acknowledge:
for (int i = 0; i < payloadLength; i += 3)
{
NetMessageType acktp = (NetMessageType)m_peer.m_receiveBuffer[ptr++]; // netmessagetype
int seqNr = m_peer.m_receiveBuffer[ptr++];
seqNr |= (m_peer.m_receiveBuffer[ptr++] << 8);
NetSenderChannelBase chan = m_sendChannels[(int)acktp - 1];
if (chan == null)
{
chan = CreateSenderChannel(acktp);
}
//m_peer.LogVerbose("Received ack for " + acktp + "#" + seqNr);
chan.ReceiveAcknowledge(now, seqNr);
}
break;
case NetMessageType.Ping:
int pingNr = m_peer.m_receiveBuffer[ptr++];
SendPong(pingNr);
break;
case NetMessageType.Pong:
NetIncomingMessage pmsg = m_peer.SetupReadHelperMessage(ptr, payloadLength);
int pongNr = pmsg.ReadByte();
float remoteSendTime = pmsg.ReadSingle();
ReceivedPong(now, pongNr, remoteSendTime);
break;
case NetMessageType.ExpandMTURequest:
SendMTUSuccess(payloadLength);
break;
case NetMessageType.ExpandMTUSuccess:
NetIncomingMessage emsg = m_peer.SetupReadHelperMessage(ptr, payloadLength);
int size = emsg.ReadInt32();
HandleExpandMTUSuccess(now, size);
break;
default:
m_peer.LogWarning("Connection received unhandled library message: " + tp);
break;
}
}
internal void Heartbeat(float now, uint frameCounter)
{
m_peer.VerifyNetworkThread();
NetException.Assert(m_status != NetConnectionStatus.InitiatedConnect && m_status != NetConnectionStatus.RespondedConnect);
if ((frameCounter % m_infrequentEventsSkipFrames) == 0)
{
if (now > m_timeoutDeadline)
{
//
// connection timed out
//
m_peer.LogVerbose("Connection timed out at " + now + " deadline was " + m_timeoutDeadline);
ExecuteDisconnect("Connection timed out", true);
return;
}
// send ping?
if (m_status == NetConnectionStatus.Connected)
{
if (now > m_sentPingTime + m_peer.m_configuration.m_pingInterval)
{
SendPing();
}
// handle expand mtu
MTUExpansionHeartbeat(now);
}
if (m_disconnectRequested)
{
ExecuteDisconnect(m_disconnectMessage, m_disconnectReqSendBye);
return;
}
}
bool connectionReset; // TODO: handle connection reset
//
// Note: at this point m_sendBufferWritePtr and m_sendBufferNumMessages may be non-null; resends may already be queued up
//
byte[] sendBuffer = m_peer.m_sendBuffer;
int mtu = m_currentMTU;
if ((frameCounter % m_messageCoalesceFrames) == 0) // coalesce a few frames
{
//
// send ack messages
//
while (m_queuedOutgoingAcks.Count > 0)
{
int acks = (mtu - (m_sendBufferWritePtr + 5)) / 3; // 3 bytes per actual ack
if (acks > m_queuedOutgoingAcks.Count)
{
acks = m_queuedOutgoingAcks.Count;
}
NetException.Assert(acks > 0);
m_sendBufferNumMessages++;
// write acks header
sendBuffer[m_sendBufferWritePtr++] = (byte)NetMessageType.Acknowledge;
sendBuffer[m_sendBufferWritePtr++] = 0; // no sequence number
sendBuffer[m_sendBufferWritePtr++] = 0; // no sequence number
int len = (acks * 3) * 8; // bits
sendBuffer[m_sendBufferWritePtr++] = (byte)len;
sendBuffer[m_sendBufferWritePtr++] = (byte)(len >> 8);
// write acks
for (int i = 0; i < acks; i++)
{
NetTuple <NetMessageType, int> tuple;
m_queuedOutgoingAcks.TryDequeue(out tuple);
//m_peer.LogVerbose("Sending ack for " + tuple.Item1 + "#" + tuple.Item2);
sendBuffer[m_sendBufferWritePtr++] = (byte)tuple.Item1;
sendBuffer[m_sendBufferWritePtr++] = (byte)tuple.Item2;
sendBuffer[m_sendBufferWritePtr++] = (byte)(tuple.Item2 >> 8);
}
if (m_queuedOutgoingAcks.Count > 0)
{
// send packet and go for another round of acks
NetException.Assert(m_sendBufferWritePtr > 0 && m_sendBufferNumMessages > 0);
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndPoint, m_sendBufferNumMessages, out connectionReset);
m_statistics.PacketSent(m_sendBufferWritePtr, 1);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
}
//
// Parse incoming acks (may trigger resends)
//
NetTuple <NetMessageType, int> incAck;
while (m_queuedIncomingAcks.TryDequeue(out incAck))
{
//m_peer.LogVerbose("Received ack for " + acktp + "#" + seqNr);
NetSenderChannelBase chan = m_sendChannels[(int)incAck.Item1 - 1];
// If we haven't sent a message on this channel there is no reason to ack it
if (chan == null)
{
continue;
}
chan.ReceiveAcknowledge(now, incAck.Item2);
}
}
//
// send queued messages
//
if (m_peer.m_executeFlushSendQueue)
{
for (int i = m_sendChannels.Length - 1; i >= 0; i--) // Reverse order so reliable messages are sent first
{
var channel = m_sendChannels[i];
NetException.Assert(m_sendBufferWritePtr < 1 || m_sendBufferNumMessages > 0);
if (channel != null)
{
channel.SendQueuedMessages(now);
}
NetException.Assert(m_sendBufferWritePtr < 1 || m_sendBufferNumMessages > 0);
}
}
//
// Put on wire data has been written to send buffer but not yet sent
//
if (m_sendBufferWritePtr > 0)
{
m_peer.VerifyNetworkThread();
NetException.Assert(m_sendBufferWritePtr > 0 && m_sendBufferNumMessages > 0);
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndPoint, m_sendBufferNumMessages, out connectionReset);
m_statistics.PacketSent(m_sendBufferWritePtr, m_sendBufferNumMessages);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
}
