private NetReceiverChannelBase CreateReceiverChannel(NetMessageType tp)
{
m_peer.VerifyNetworkThread();
// create receiver channel
NetReceiverChannelBase chan;
NetDeliveryMethod method = NetUtility.GetDeliveryMethod(tp);
switch (method)
{
case NetDeliveryMethod.Unreliable:
chan = new NetUnreliableUnorderedReceiver(this);
break;
case NetDeliveryMethod.ReliableOrdered:
chan = new NetReliableOrderedReceiver(this, NetConstants.ReliableOrderedWindowSize);
break;
case NetDeliveryMethod.UnreliableSequenced:
chan = new NetUnreliableSequencedReceiver(this);
break;
case NetDeliveryMethod.ReliableUnordered:
chan = new NetReliableUnorderedReceiver(this, NetConstants.ReliableOrderedWindowSize);
break;
case NetDeliveryMethod.ReliableSequenced:
chan = new NetReliableSequencedReceiver(this, NetConstants.ReliableSequencedWindowSize);
break;
default:
throw new NetException("Unhandled NetDeliveryMethod!");
}
int channelSlot = (int)tp - 1;
NetException.Assert(m_receiveChannels[channelSlot] == null);
m_receiveChannels[channelSlot] = chan;
return(chan);
}
// remoteWindowStart is remote expected sequence number; everything below this has arrived properly
// seqNr is the actual nr received
internal override void ReceiveAcknowledge(double now, int seqNr)
{
if (m_doFlowControl == false)
{
// we have no use for acks on this channel since we don't respect the window anyway
m_connection.m_peer.LogVerbose("SuppressUnreliableUnorderedAcks sender/receiver mismatch!");
return;
}
// late (dupe), on time or early ack?
int relate = NetUtility.RelativeSequenceNumber(seqNr, m_windowStart);
if (relate < 0)
{
//m_connection.m_peer.LogDebug("Received late/dupe ack for #" + seqNr);
return; // late/duplicate ack
}
if (relate == 0)
{
//m_connection.m_peer.LogDebug("Received right-on-time ack for #" + seqNr);
// ack arrived right on time
NetException.Assert(seqNr == m_windowStart);
m_receivedAcks[m_windowStart] = false;
m_windowStart = (m_windowStart + 1) % NetConstants.NumSequenceNumbers;
return;
}
// Advance window to this position
m_receivedAcks[seqNr] = true;
while (m_windowStart != seqNr)
{
m_receivedAcks[m_windowStart] = false;
m_windowStart = (m_windowStart + 1) % NetConstants.NumSequenceNumbers;
}
}
public void TestScenario()
{
var peer = TestHelper.CreatePeer();
NetOutgoingMessage msg = peer.CreateMessage();
msg.Write(false);
msg.Write(-3, 6);
msg.Write(42);
msg.Write("duke of earl");
msg.Write((byte)43);
msg.Write((ushort)44);
msg.Write(UInt64.MaxValue, 64);
msg.Write(true);
msg.WritePadBits();
int bcnt = 0;
msg.Write(567845.0f);
msg.WriteVariableInt32(2115998022);
msg.Write(46.0);
msg.Write((ushort)14, 9);
bcnt += msg.WriteVariableInt32(-47);
msg.WriteVariableInt32(470000);
msg.WriteVariableUInt32(48);
bcnt += msg.WriteVariableInt64(-49);
if (bcnt != 2)
{
throw new NetException("WriteVariable* wrote too many bytes!");
}
byte[] data = msg.Data;
NetIncomingMessage inc = TestHelper.CreateIncomingMessage(data, msg.LengthBits);
StringBuilder bdr = new StringBuilder();
bdr.Append(inc.ReadBoolean());
bdr.Append(inc.ReadInt32(6));
bdr.Append(inc.ReadInt32());
string strResult;
bool ok = inc.ReadString(out strResult);
if (ok == false)
{
throw new NetException("Read/write failure");
}
bdr.Append(strResult);
bdr.Append(inc.ReadByte());
if (inc.PeekUInt16() != (ushort)44)
{
throw new NetException("Read/write failure");
}
bdr.Append(inc.ReadUInt16());
if (inc.PeekUInt64(64) != UInt64.MaxValue)
{
throw new NetException("Read/write failure");
}
bdr.Append(inc.ReadUInt64());
bdr.Append(inc.ReadBoolean());
inc.SkipPadBits();
bdr.Append(inc.ReadSingle());
bdr.Append(inc.ReadVariableInt32());
bdr.Append(inc.ReadDouble());
bdr.Append(inc.ReadUInt32(9));
bdr.Append(inc.ReadVariableInt32());
bdr.Append(inc.ReadVariableInt32());
bdr.Append(inc.ReadVariableUInt32());
bdr.Append(inc.ReadVariableInt64());
if (bdr.ToString().Equals("False-342duke of earl434418446744073709551615True56784521159980224614-4747000048-49"))
{
Console.WriteLine("Read/write tests OK");
}
else
{
throw new NetException("Read/write tests FAILED!");
}
msg = peer.CreateMessage();
NetOutgoingMessage tmp = peer.CreateMessage();
tmp.Write((int)42, 14);
msg.Write(tmp);
msg.Write(tmp);
if (msg.LengthBits != tmp.LengthBits * 2)
{
throw new NetException("NetOutgoingMessage.Write(NetOutgoingMessage) failed!");
}
tmp = peer.CreateMessage();
Test test = new Test();
test.Number = 42;
test.Name = "Hallon";
test.Age = 8.2f;
tmp.WriteAllFields(test, BindingFlags.Public | BindingFlags.Instance);
data = tmp.Data;
inc = TestHelper.CreateIncomingMessage(data, tmp.LengthBits);
Test readTest = new Test();
inc.ReadAllFields(readTest, BindingFlags.Public | BindingFlags.Instance);
NetException.Assert(readTest.Number == 42);
NetException.Assert(readTest.Name == "Hallon");
NetException.Assert(readTest.Age == 8.2f);
// test aligned WriteBytes/ReadBytes
msg = peer.CreateMessage();
byte[] tmparr = new byte[] { 5, 6, 7, 8, 9 };
msg.Write(tmparr);
inc = TestHelper.CreateIncomingMessage(msg.Data, msg.LengthBits);
byte[] result = inc.ReadBytes(tmparr.Length);
for (int i = 0; i < tmparr.Length; i++)
{
if (tmparr[i] != result[i])
{
throw new Exception("readbytes fail");
}
}
}
internal override void ReceiveMessage(NetIncomingMessage message)
{
int relate = NetUtility.RelativeSequenceNumber(message.m_sequenceNumber, m_windowStart);
// ack no matter what
m_connection.QueueAck(message.m_receivedMessageType, message.m_sequenceNumber);
if (relate == 0)
{
// Log("Received message #" + message.SequenceNumber + " right on time");
//
// excellent, right on time
//
//m_peer.LogVerbose("Received RIGHT-ON-TIME " + message);
AdvanceWindow();
m_peer.ReleaseMessage(message);
// release withheld messages
int nextSeqNr = (message.m_sequenceNumber + 1) % NetConstants.NumSequenceNumbers;
while (m_earlyReceived[nextSeqNr % m_windowSize])
{
message = m_withheldMessages[nextSeqNr % m_windowSize];
NetException.Assert(message != null);
// remove it from withheld messages
m_withheldMessages[nextSeqNr % m_windowSize] = null;
m_peer.LogVerbose("Releasing withheld message #" + message);
m_peer.ReleaseMessage(message);
AdvanceWindow();
nextSeqNr++;
}
return;
}
if (relate < 0)
{
// duplicate
m_connection.m_statistics.MessageDropped();
m_peer.LogVerbose("Received message #" + message.m_sequenceNumber + " DROPPING DUPLICATE");
return;
}
// relate > 0 = early message
if (relate > m_windowSize)
{
// too early message!
m_connection.m_statistics.MessageDropped();
m_peer.LogDebug("Received " + message + " TOO EARLY! Expected " + m_windowStart);
return;
}
m_earlyReceived.Set(message.m_sequenceNumber % m_windowSize, true);
m_peer.LogVerbose("Received " + message + " WITHHOLDING, waiting for " + m_windowStart);
m_withheldMessages[message.m_sequenceNumber % m_windowSize] = message;
}
internal void Heartbeat(double 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);
if (channel.NeedToSendMessages())
{
m_peer.m_needFlushSendQueue = true; // failed to send all queued sends; likely a full window - need to try again
}
}
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;
}
}
public static void Run(NetPeer peer)
{
NetOutgoingMessage msg = peer.CreateMessage();
msg.Write(false);
msg.Write(-3, 6);
msg.Write(42);
msg.Write("duke of earl");
msg.Write((byte)43);
msg.Write((ushort)44);
msg.Write(true);
msg.WritePadBits();
int bcnt = 0;
msg.Write(45.0f);
msg.Write(46.0);
bcnt += msg.WriteVariableInt32(-47);
msg.WriteVariableInt32(470000);
msg.WriteVariableUInt32(48);
bcnt += msg.WriteVariableInt64(-49);
if (bcnt != 2)
{
throw new NetException("WriteVariable* wrote too many bytes!");
}
byte[] data = msg.PeekDataBuffer();
NetIncomingMessage inc = Program.CreateIncomingMessage(data, msg.LengthBits);
StringBuilder bdr = new StringBuilder();
bdr.Append(inc.ReadBoolean());
bdr.Append(inc.ReadInt32(6));
bdr.Append(inc.ReadInt32());
bdr.Append(inc.ReadString());
bdr.Append(inc.ReadByte());
if (inc.PeekUInt16() != (ushort)44)
{
throw new NetException("Read/write failure");
}
bdr.Append(inc.ReadUInt16());
bdr.Append(inc.ReadBoolean());
inc.SkipPadBits();
bdr.Append(inc.ReadSingle());
bdr.Append(inc.ReadDouble());
bdr.Append(inc.ReadVariableInt32());
bdr.Append(inc.ReadVariableInt32());
bdr.Append(inc.ReadVariableUInt32());
bdr.Append(inc.ReadVariableInt64());
if (bdr.ToString().Equals("False-342duke of earl4344True4546-4747000048-49"))
{
Console.WriteLine("Read/write tests OK");
}
else
{
throw new NetException("Read/write tests FAILED!");
}
msg = peer.CreateMessage();
NetOutgoingMessage tmp = peer.CreateMessage();
tmp.Write((int)42, 14);
msg.Write(tmp);
msg.Write(tmp);
if (msg.LengthBits != tmp.LengthBits * 2)
{
throw new NetException("NetOutgoingMessage.Write(NetOutgoingMessage) failed!");
}
tmp = peer.CreateMessage();
Test test = new Test();
test.Number = 42;
test.Name = "Hallon";
test.Age = 8.2f;
tmp.WriteAllFields(test, BindingFlags.Public | BindingFlags.Instance);
data = tmp.PeekDataBuffer();
inc = Program.CreateIncomingMessage(data, tmp.LengthBits);
Test readTest = new Test();
inc.ReadAllFields(readTest, BindingFlags.Public | BindingFlags.Instance);
NetException.Assert(readTest.Number == 42);
NetException.Assert(readTest.Name == "Hallon");
NetException.Assert(readTest.Age == 8.2f);
// test aligned WriteBytes/ReadBytes
msg = peer.CreateMessage();
byte[] tmparr = new byte[] { 5, 6, 7, 8, 9 };
msg.Write(tmparr);
inc = Program.CreateIncomingMessage(msg.PeekDataBuffer(), msg.LengthBits);
byte[] result = inc.ReadBytes(tmparr.Length);
for (int i = 0; i < tmparr.Length; i++)
{
if (tmparr[i] != result[i])
{
throw new Exception("readbytes fail");
}
}
}
