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Code Issues Releases Activity

ConnectionLatencyUpdated message type added; WriteTime() ReadTime() added

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lidgren
2010-12-20 10:35:51 +00:00
parent 772d80835b
commit 330c5cf83e
11 changed files with 85 additions and 25 deletions
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42
Lidgren.Network/NetConnection.Latency.cs
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@@ -9,11 +9,19 @@ namespace Lidgren.Network
private float m_averageRoundtripTime;
private float m_timeoutDeadline = float.MaxValue;
// local time value + m_remoteTimeOffset = remote time value
internal double m_remoteTimeOffset;
/// <summary>
/// Gets the current average roundtrip time in seconds
/// </summary>
public float AverageRoundtripTime { get { return m_averageRoundtripTime; } }
internal double GetLocalTime(double remoteTimeStamp)
{
return remoteTimeStamp - m_remoteTimeOffset;
}
internal void InitializePing()
{
// randomize ping sent time (0.25 - 1.0 x ping interval)
@@ -27,11 +35,10 @@ namespace Lidgren.Network
m_peer.VerifyNetworkThread();
m_sentPingNumber++;
if (m_sentPingNumber >= 256)
m_sentPingNumber = 0;
m_sentPingTime = (float)NetTime.Now;
NetOutgoingMessage om = m_peer.CreateMessage(1);
om.Write((byte)m_sentPingNumber);
om.Write((byte)m_sentPingNumber); // truncating to 0-255
om.m_messageType = NetMessageType.Ping;
int len = om.Encode(m_peer.m_sendBuffer, 0, 0);
@@ -45,20 +52,22 @@ namespace Lidgren.Network
{
m_peer.VerifyNetworkThread();
NetOutgoingMessage om = m_peer.CreateMessage(1);
NetOutgoingMessage om = m_peer.CreateMessage(5);
om.Write((byte)pingNumber);
om.Write((float)NetTime.Now); // we should update this value to reflect the exact point in time the packet is SENT
om.m_messageType = NetMessageType.Pong;
int len = om.Encode(m_peer.m_sendBuffer, 0, 0);
bool connectionReset;
m_peer.SendPacket(len, m_remoteEndpoint, 1, out connectionReset);
m_statistics.PacketSent(len, 1);
}
internal void ReceivedPong(float now, int pongNumber)
internal void ReceivedPong(float now, int pongNumber, float remoteSendTime)
{
if (pongNumber != m_sentPingNumber)
if ((byte)pongNumber != (byte)m_sentPingNumber)
{
m_peer.LogVerbose("Ping/Pong mismatch; dropped message?");
return;
@@ -69,15 +78,20 @@ namespace Lidgren.Network
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; // initial estimate
m_peer.LogDebug("Initiated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime));
m_peer.LogDebug("Initiated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime) + " Server time is: " + (now + diff));
}
else
{
m_averageRoundtripTime = (m_averageRoundtripTime * 0.7f) + (float)(rtt * 0.3f);
m_peer.LogVerbose("Updated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime));
m_remoteTimeOffset = ((m_remoteTimeOffset * (double)(m_sentPingNumber - 1)) + diff) / (double)m_sentPingNumber;
m_peer.LogVerbose("Updated average roundtrip time to " + NetTime.ToReadable(m_averageRoundtripTime) + ", server time to " + (now + m_remoteTimeOffset) + " (ie. diff " + m_remoteTimeOffset + ")");
}
// update resend delay for all channels
@@ -89,7 +103,17 @@ namespace Lidgren.Network
rchan.m_resendDelay = resendDelay;
}
m_peer.LogVerbose("Timeout deadline pushed to " + m_timeoutDeadline);
// 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);
}
}
}
}