internal void StoreMessage(double now, OutgoingNetMessage msg)
{
int chanBufIdx = (int)msg.m_sequenceChannel - (int)NetChannel.ReliableUnordered;
List <OutgoingNetMessage> list = m_storedMessages[chanBufIdx];
if (list == null)
{
list = new List <OutgoingNetMessage>();
m_storedMessages[chanBufIdx] = list;
}
list.Add(msg);
// schedule resend
double nextResend = now + m_owner.Configuration.ResendFunction(msg.m_numSent, m_currentAvgRoundtrip);
msg.m_nextResend = nextResend;
// if (msg.m_numSent >= 10) UnityEngine.Debug.Log(now + ": Try no " + msg.m_numSent + ": " + NetUtility.BytesToHex(msg.m_data.ToArray()));
m_owner.LogVerbose("Stored " + msg + " @ " + NetTime.ToMillis(now) + " next resend in " + NetTime.ToMillis(msg.m_nextResend - now) + " ms", this);
// earliest?
if (nextResend < m_earliestResend[chanBufIdx])
{
m_earliestResend[chanBufIdx] = nextResend;
}
}
private void ReceivedPong(double rtSeconds, NetMessage pong)
{
double now = NetTime.Now;
m_lastPongReceived = now;
if (pong != null)
{
ushort remote = pong.m_data.ReadUInt16();
ushort local = NetTime.Encoded(now);
int diff = local - remote - (int)(rtSeconds * 1000.0);
if (diff < 0)
{
diff += ushort.MaxValue;
}
m_remoteTimeOffset = diff; // TODO: slowly go towards? (m_remoteTimeOffset + diff) / 2;
m_owner.LogVerbose("Got pong; roundtrip was " + (int)(rtSeconds * 1000) + " ms");
}
m_latencyHistory[2] = m_latencyHistory[1];
m_latencyHistory[1] = m_latencyHistory[0];
m_latencyHistory[0] = rtSeconds;
m_currentAvgRoundtrip = ((rtSeconds * 3) + (m_latencyHistory[1] * 2) + m_latencyHistory[2]) / 6.0;
m_ackMaxDelayTime = (float)(
m_owner.m_config.m_maxAckWithholdTime * rtSeconds * m_owner.m_config.m_resendTimeMultiplier
);
}
/// <summary>
/// Returns a string that represents this object
/// </summary>
public override string ToString()
{
// TODO: add custom format support
var sb = new StringBuilder();
sb.AppendFormat("Average roundtrip time: {0}", NetTime.ToReadable(_connection.AverageRoundtripTime)).AppendLine();
sb.AppendFormat("Current MTU: {0}", _connection.CurrentMTU).AppendLine();
sb.AppendFormat(
"Sent {0} bytes in {1} messages in {2} packets",
_sentBytes, _sentMessages, _sentPackets).AppendLine();
sb.AppendFormat(
"Received {0} bytes in {1} messages ({2} fragments) in {3} packets",
_receivedBytes, _receivedMessages, _receivedFragments, _receivedPackets).AppendLine();
sb.AppendLine();
sb.AppendFormat("Queued: {0}", QueuedMessages).AppendLine();
sb.AppendFormat("Stored: {0}", StoredMessages).AppendLine();
sb.AppendFormat("Witheld: {0}", WithheldMessages).AppendLine();
sb.AppendFormat("Resent (by delay): {0}", _resentMessagesDueToDelay).AppendLine();
sb.AppendFormat("Resent (by hole): {0}", _resentMessagesDueToHole).AppendLine();
return(sb.ToString());
}
internal void StoreMessage(double now, OutgoingNetMessage msg)
{
int chanBufIdx = (int)msg.m_sequenceChannel - (int)NetChannel.ReliableUnordered;
List <OutgoingNetMessage> list = m_storedMessages[chanBufIdx];
if (list == null)
{
list = new List <OutgoingNetMessage>();
m_storedMessages[chanBufIdx] = list;
}
list.Add(msg);
// schedule resend
float multiplier = (1 + (msg.m_numSent * msg.m_numSent)) * m_owner.m_config.m_resendTimeMultiplier;
double nextResend = now + (0.025f + (float)m_currentAvgRoundtrip * 1.1f * multiplier);
msg.m_nextResend = nextResend;
m_owner.LogVerbose("Stored " + msg + " @ " + NetTime.ToMillis(now) + " next resend in " + NetTime.ToMillis(msg.m_nextResend - now) + " ms", this);
// earliest?
if (nextResend < m_earliestResend[chanBufIdx])
{
m_earliestResend[chanBufIdx] = nextResend;
}
}
internal void ReceivedPong(float now, int pongNumber, float remoteSendTime)
{
if ((byte)pongNumber != (byte)m_sentPingNumber)
{
m_peer.LogVerbose("Ping/Pong mismatch; dropped message?");
return;
}
m_timeoutDeadline = now + m_peerConfiguration.m_connectionTimeout;
float rtt = now - m_sentPingTime;
NetException.Assert(rtt >= 0);
double diff = (remoteSendTime + (rtt / 2.0)) - now;
if (m_averageRoundtripTime < 0)
{
m_remoteTimeOffset = diff;
m_averageRoundtripTime = rtt;
m_peer.LogDebug("Initiated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime) + " Remote time is: " + (now + diff));
}
else
{
m_averageRoundtripTime = (m_averageRoundtripTime * 0.7f) + (float)(rtt * 0.3f);
m_remoteTimeOffset = ((m_remoteTimeOffset * (double)(m_sentPingNumber - 1)) + diff) / (double)m_sentPingNumber;
m_peer.LogVerbose("Updated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime) + ", remote time to " + (now + m_remoteTimeOffset) + " (ie. diff " + m_remoteTimeOffset + ")");
}
// update resend delay for all channels
float resendDelay = GetResendDelay();
int ct = m_sendChannels.Length;
for (int i = 0; i < ct; ++i)
{
var chan = m_sendChannels[i];
var rchan = chan as NetReliableSenderChannel;
if (rchan != null)
{
rchan.m_resendDelay = resendDelay;
}
}
// m_peer.LogVerbose("Timeout deadline pushed to " + m_timeoutDeadline);
// notify the application that average rtt changed
if (m_peer.m_configuration.IsMessageTypeEnabled(NetIncomingMessageType.ConnectionLatencyUpdated))
{
NetIncomingMessage update = m_peer.CreateIncomingMessage(NetIncomingMessageType.ConnectionLatencyUpdated, 4);
update.m_senderConnection = this;
update.m_senderEndPoint = this.m_remoteEndPoint;
update.Write(rtt);
m_peer.ReleaseMessage(update);
}
}
public static double FromEncoded(
double now,
int remoteMillisOffset,
ushort encodedRemoteTimestamp,
out int adjustRemoteMillis)
{
// my encoded time
ushort localNow = (ushort)(now * 1000 % ushort.MaxValue);
ushort localStamp = NetTime.NormalizeEncoded(encodedRemoteTimestamp + remoteMillisOffset);
int elapsedMillis = NetTime.GetElapsedMillis(localStamp, localNow);
adjustRemoteMillis = 0;
return(now - ((float)elapsedMillis / 1000.0f));
}
internal static void QueuePing(NetBase netBase, IPEndPoint toEndPoint, double now)
{
ushort nowEnc = NetTime.Encoded(now);
NetBuffer buffer = netBase.m_scratchBuffer;
buffer.Reset();
buffer.Write(nowEnc);
netBase.QueueSingleUnreliableSystemMessage(
NetSystemType.Ping,
buffer,
toEndPoint,
false
);
}
internal void ResendMessages(double now)
{
for (int i = 0; i < m_storedMessages.Length; i++)
{
List <OutgoingNetMessage> list = m_storedMessages[i];
if (list == null || list.Count < 1)
{
continue;
}
if (now > m_earliestResend[i])
{
//TODO: try to find a way to avoid this, this is a quick fix to avoid quadratic time complexity
var newlist = new List <OutgoingNetMessage>(list.Count);
double newEarliest = double.MaxValue;
foreach (OutgoingNetMessage msg in list)
{
double resend = msg.m_nextResend;
if (now > resend)
{
// Re-enqueue message in unsent list
m_owner.LogVerbose("Resending " + msg +
" now: " + NetTime.ToMillis(now) +
" nextResend: " + NetTime.ToMillis(msg.m_nextResend), this);
m_statistics.CountMessageResent(msg.m_type);
m_unsentMessages.Enqueue(msg);
}
else
{
newlist.Add(msg);
}
if (resend < newEarliest)
{
newEarliest = resend;
}
}
m_storedMessages[i] = newlist;
m_earliestResend[i] = newEarliest;
}
}
}
internal void ResendMessages(double now)
{
for (int i = 0; i < m_storedMessages.Length; i++)
{
List <OutgoingNetMessage> list = m_storedMessages[i];
if (list == null || list.Count < 1)
{
continue;
}
if (now > m_earliestResend[i])
{
double newEarliest = double.MaxValue;
foreach (OutgoingNetMessage msg in list)
{
double resend = msg.m_nextResend;
if (now > resend)
{
// Re-enqueue message in unsent list
m_owner.LogVerbose("Resending " + msg +
" now: " + NetTime.ToMillis(now) +
" nextResend: " + NetTime.ToMillis(msg.m_nextResend), this);
m_statistics.CountMessageResent(msg.m_type);
m_removeList.Add(msg);
m_unsentMessages.Enqueue(msg);
}
if (resend < newEarliest)
{
newEarliest = resend;
}
}
m_earliestResend[i] = newEarliest;
foreach (OutgoingNetMessage msg in m_removeList)
{
list.Remove(msg);
}
m_removeList.Clear();
}
}
}
internal void ReceivedPong(float now, int pongNumber)
{
if (pongNumber != m_sentPingNumber)
{
m_peer.LogVerbose("Ping/Pong mismatch; dropped message?");
return;
}
m_timeoutDeadline = now + m_peerConfiguration.m_connectionTimeout;
float rtt = now - m_sentPingTime;
NetException.Assert(rtt >= 0);
if (m_averageRoundtripTime < 0)
{
m_averageRoundtripTime = rtt; // initial estimate
m_peer.LogDebug("Initiated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime));
}
else
{
m_averageRoundtripTime = (m_averageRoundtripTime * 0.7f) + (float)(rtt * 0.3f);
m_peer.LogVerbose("Updated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime));
}
// update resend delay for all channels
float resendDelay = GetResendDelay();
foreach (var chan in m_sendChannels)
{
var rchan = chan as NetReliableSenderChannel;
if (rchan != null)
{
rchan.m_resendDelay = resendDelay;
}
}
m_peer.LogVerbose("Timeout deadline pushed to " + m_timeoutDeadline);
}
internal void HandleAckMessage(double now, IncomingNetMessage ackMessage)
{
int len = ackMessage.m_data.LengthBytes;
if ((len % 3) != 0)
{
if ((m_owner.m_enabledMessageTypes & NetMessageType.BadMessageReceived) == NetMessageType.BadMessageReceived)
{
m_owner.NotifyApplication(NetMessageType.BadMessageReceived, "Malformed ack message; length must be multiple of 3; it's " + len, this, ackMessage.m_senderEndPoint);
}
return;
}
for (int i = 0; i < len; i += 3) //for each channel + seq nbr in ACK
{
NetChannel chan = (NetChannel)ackMessage.m_data.ReadByte();
int seqNr = ackMessage.m_data.ReadUInt16();
// LogWrite("Acknowledgement received: " + chan + "|" + seqNr);
m_statistics.CountAcknowledgesReceived(1);
// remove saved message
int relChanNr = (int)chan - (int)NetChannel.ReliableUnordered;
if (relChanNr < 0)
{
if ((m_owner.m_enabledMessageTypes & NetMessageType.BadMessageReceived) == NetMessageType.BadMessageReceived)
{
m_owner.NotifyApplication(NetMessageType.BadMessageReceived, "Malformed ack message; indicated netchannel " + chan, this, ackMessage.m_senderEndPoint);
}
continue;
}
List <OutgoingNetMessage> list = m_storedMessages[relChanNr];
if (list != null)
{
int cnt = list.Count;
if (cnt > 0)
{
for (int j = 0; j < cnt; j++) //for each stored message on channel
{
OutgoingNetMessage msg = list[j];
if (msg.m_sequenceNumber == seqNr) //find correct message
{
// if (msg.m_numSent >= 10) UnityEngine.Debug.Log(now + ": Ack for " + msg.m_numSent + ": " + NetUtility.BytesToHex(msg.m_data.ToArray()));
//LogWrite("Removed stored message: " + msg);
list.RemoveAt(j);
// reduce estimated amount of packets on wire
//CongestionCountAck(msg.m_packetNumber);
// fire receipt
if (msg.m_receiptData != null)
{
m_owner.LogVerbose("Got ack, removed from storage: " + msg + " firing receipt; " + msg.m_receiptData, this);
m_owner.FireReceipt(this, msg.m_receiptData);
}
else
{
m_owner.LogVerbose("Got ack, removed from storage: " + msg, this);
}
// recycle
msg.m_data.m_refCount--;
if (msg.m_data.m_refCount <= 0)
{
m_owner.RecycleBuffer(msg.m_data); // time to recycle buffer
}
msg.m_data = null;
//m_owner.m_messagePool.Push(msg);
#if !NO_NAK
if (j > 0)
{
int k;
for (k = 0; k < j; k++) //for each message stored prior to the one matching seq nbr
{
var m = list[k];
if (m.m_sequenceNumber > seqNr)
{
break;
}
// Re-enqueue message in unsent list
m_owner.LogVerbose("Implicit NAK Resending " + m +
" now: " + NetTime.NowInMillis +
" nextResend: " + NetTime.ToMillis(m.m_nextResend), this);
m_statistics.CountMessageResent(m.m_type);
m_unsentMessages.Enqueue(m);
}
list.RemoveRange(0, k);
}
#endif
break; //exit stored message loop since this was the message corresponding to seq nbr
//now returning to next sequence number in ACK packet
}
}
}
}
}
// recycle
NetBuffer rb = ackMessage.m_data;
rb.m_refCount = 0; // ack messages can't be used by more than one message
ackMessage.m_data = null;
m_owner.RecycleBuffer(rb);
//m_owner.m_messagePool.Push(ackMessage);
}
public string GetStatisticsString(NetConnection connection)
{
double now = NetTime.Now;
string retval =
"--- Application wide statistics ---" + Environment.NewLine +
"Heartbeats: " + this.HeartbeatAverageFrequency + "/sec" + Environment.NewLine +
"Packets sent: " + m_statistics.PacketsSent + " (" + m_statistics.GetPacketsSentPerSecond(now).ToString("N1") + "/sec)" + Environment.NewLine +
"Bytes sent: " + m_statistics.BytesSent + " (" + m_statistics.GetBytesSentPerSecond(now).ToString("N1") + "/sec)" + Environment.NewLine +
"Packets received: " + m_statistics.PacketsReceived + " (" + m_statistics.GetPacketsReceivedPerSecond(now).ToString("N1") + "/sec)" + Environment.NewLine +
"Bytes received: " + m_statistics.BytesReceived + " (" + m_statistics.GetBytesReceivedPerSecond(now).ToString("N1") + "/sec)" + Environment.NewLine;
if (m_simulatedLoss > 0.0f)
{
retval = retval +
"Simulated dropped packets: " + m_statistics.SimulatedDroppedPackets + Environment.NewLine +
"Simulated delayed packets: " + m_delayedPackets.Count + Environment.NewLine
;
}
if (connection != null)
{
NetConnectionStatistics connStats = connection.Statistics;
retval += Environment.NewLine +
"--- Connection wide statistics ---" + Environment.NewLine +
"Status: " + connection.Status + Environment.NewLine +
"Received -----" + Environment.NewLine +
"Messages: " + connStats.GetMessagesReceived(true) + "/sec)" + Environment.NewLine +
" User/type: " +
connStats.GetUserUnreliableReceived() + "/" +
connStats.GetUserSequencedReceived() + "/" +
connStats.GetUserReliableUnorderedReceived() + "/" +
connStats.GetUserOrderedReceived() + Environment.NewLine +
"Packets: " + connStats.PacketsReceived + Environment.NewLine +
"Bytes: " + connStats.GetBytesReceived(true) + Environment.NewLine +
"Acks: " + connStats.AcknowledgesReceived + Environment.NewLine +
Environment.NewLine +
"Sent ------" + Environment.NewLine +
"Messages: " + connStats.GetMessagesSent(true) +
" (excl. resends " + (connStats.GetMessagesSent(true) - connStats.MessagesResent) + ")" + Environment.NewLine +
" User/type: " +
connStats.GetUserUnreliableSent() + "/" +
connStats.GetUserSequencedSent() + "/" +
connStats.GetUserReliableUnorderedSent() + "/" +
connStats.GetUserOrderedSent() + Environment.NewLine +
"Packets: " + connStats.PacketsSent + Environment.NewLine +
"Bytes: " + connStats.GetBytesSent(true) + Environment.NewLine +
"Acks: " + connStats.AcknowledgesSent + Environment.NewLine +
Environment.NewLine +
"Resent: " + connStats.MessagesResent + Environment.NewLine +
"Duplicates: " + connStats.DuplicateMessagesRejected + Environment.NewLine +
"Dropped sequenced: " + connStats.SequencedMessagesRejected + Environment.NewLine +
Environment.NewLine +
"Unsent messages: " + connection.m_unsentMessages.Count + Environment.NewLine +
"Stored messages: " + connStats.CurrentlyStoredMessagesCount + Environment.NewLine +
"Withheld messages: " + connStats.CurrentlyWithheldMessagesCount + Environment.NewLine +
"Average roundtrip: " + NetTime.ToMillis(connection.AverageRoundtripTime) + " ms" + Environment.NewLine
//"Window: " + connection.GetEstimatedPacketsOnWire() + " of " + connection.m_congestionWindowSize
;
}
return(retval);
}
/// <summary>
/// Called to bind to socket and start heartbeat thread.
/// The socket will be bound to listen on any network interface unless the <see cref="NetConfiguration.Address"/> explicitly specifies an interface.
/// </summary>
public void Start()
{
if (m_isBound)
{
return;
}
// TODO: this check should be done somewhere earlier, in uLink preferably.
if (m_config.StartPort > m_config.EndPort)
{
throw new NetException("The start port (" + m_config.StartPort + ") must be less or equal to the end port (" + m_config.EndPort + ")");
}
//by WuNan @2016/09/28 14:26:22
var bindIP = String.IsNullOrEmpty(m_config.AddressStr) ?
#if (UNITY_IOS || UNITY_TVOS) && !UNITY_EDITOR
(uLink.NetworkUtility.IsSupportIPv6() ? IPAddress.IPv6Any : IPAddress.Any) : NetUtility.Resolve(m_config.AddressStr);
#else
IPAddress.Any : NetUtility.Resolve(m_config.AddressStr);
#endif
Log.Debug(LogFlags.Socket, "Creating non-blocking UDP socket");
var sock = NetworkSocket.Create(m_config.SocketType);
Log.Debug(LogFlags.Socket, "Successfully created Socket");
for (int port = m_config.StartPort; port <= m_config.EndPort; port++)
{
try
{
sock.Bind(new NetworkEndPoint(bindIP, port));
m_isBound = true;
break;
}
catch (SocketException ex)
{
Log.Debug(LogFlags.Socket, "Failed to bind to specific port ", port, ": ", ex);
if (port == m_config.EndPort)
{
try
{
sock.Close(0);
}
catch
{
}
throw new NetException("Failed to bind to port range " + m_config.StartPort + "-" + m_config.EndPort, ex);
}
}
}
m_socket = sock;
LogWrite("Listening on " + m_socket.listenEndPoint);
if (m_config.ReceiveBufferSize != 0)
{
try
{
m_socket.receiveBufferSize = m_config.ReceiveBufferSize;
m_config.ReceiveBufferSize = m_socket.receiveBufferSize; // make sure we have the actual size
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to set socket ", SocketOptionName.ReceiveBuffer, " size to ", m_config.ReceiveBufferSize, ": ", ex);
}
}
else
{
try
{
m_config.ReceiveBufferSize = m_socket.receiveBufferSize;
Log.Debug(LogFlags.Socket, "Socket ", SocketOptionName.ReceiveBuffer, " is set to OS-specific default ", m_config.ReceiveBufferSize);
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to get socket ", SocketOptionName.ReceiveBuffer, ": ", ex);
}
}
if (m_config.SendBufferSize != 0)
{
try
{
m_socket.sendBufferSize = m_config.SendBufferSize;
m_config.SendBufferSize = m_socket.sendBufferSize; // make sure we have the actual size
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to set socket ", SocketOptionName.SendBuffer, " size to ", m_config.SendBufferSize, ": ", ex);
}
}
else
{
try
{
m_config.SendBufferSize = m_socket.sendBufferSize;
Log.Debug(LogFlags.Socket, "Socket ", SocketOptionName.SendBuffer, " is set to OS-specific default ", m_config.SendBufferSize);
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to get socket ", SocketOptionName.SendBuffer, ": ", ex);
}
}
m_receiveBuffer.EnsureBufferSizeInBytes(m_config.ReceiveBufferSize);
m_sendBuffer.EnsureBufferSizeInBytes(m_config.SendBufferSize);
// TODO: ugly hack to determine if server
if (this is NetServer)
{
m_socket.Listen(m_config.MaxConnections);
}
// display simulated networking conditions in debug log
if (m_simulatedLoss > 0.0f)
{
LogWrite("Simulating " + (m_simulatedLoss * 100.0f) + "% loss");
}
if (m_simulatedMinimumLatency > 0.0f || m_simulatedLatencyVariance > 0.0f)
{
LogWrite("Simulating " + ((int)(m_simulatedMinimumLatency * 1000.0f)) + " - " + NetTime.ToMillis(m_simulatedMinimumLatency + m_simulatedLatencyVariance) + " ms roundtrip latency");
}
if (m_simulatedDuplicateChance > 0.0f)
{
LogWrite("Simulating " + (m_simulatedDuplicateChance * 100.0f) + "% chance of packet duplication");
}
if (m_config.m_throttleBytesPerSecond > 0)
{
LogWrite("Throttling to " + m_config.m_throttleBytesPerSecond + " bytes per second");
}
m_isBound = true;
m_shutdownComplete = false;
m_statistics.Reset();
}
public override string ToString()
{
return("roundtrip " + NetTime.ToMillis(roundtripTime) + " ms, offset " + timeOffset + " s");
}