public override void SendUserData(OutgoingPackage package)
{
// 更新发送序号
var seq = (ushort)this.Context.SeqNoManager.GetAndUpdateSendSeq();
// 计算用户数据在发送队列中的排队时延。
package.QueuingDelay = (UInt32)((DateTime.Now - package.CreationTime).TotalMilliseconds / 10);
// 计算发送方时间戳
var currentTime = TripleTimestamp.CurrentTimestamp;
var senderTimeStamp = currentTime;
if (currentTime > (package.ExtraDelay + package.QueuingDelay))
{
senderTimeStamp = currentTime - package.ExtraDelay - package.QueuingDelay;
}
var dtFrame = new SaiTtsFrameAppData(seq,
senderTimeStamp,
this.TTS.RemoteLastSendTimestamp,
this.TTS.LocalLastRecvTimeStamp,
package.UserData);
this.Context.NextLayer.SendUserData(dtFrame.GetBytes());
}
public static SaiFrame Parse(byte[] bytes)
{
SaiFrame theFrame = null;
var theFrameType = (SaiFrameType)bytes[0];
if (theFrameType == SaiFrameType.TTS_OffsetStart)
{
theFrame = new SaiTtsFrameOffsetStart();
}
else if (theFrameType == SaiFrameType.TTS_OffsetAnswer1)
{
theFrame = new SaiTtsFrameOffsetAnswer1();
}
else if (theFrameType == SaiFrameType.TTS_OffsetAnswer2)
{
theFrame = new SaiTtsFrameOffsetAnswer2();
}
else if (theFrameType == SaiFrameType.TTS_OffsetEstimate)
{
theFrame = new SaiTtsFrameEstimate();
}
else if (theFrameType == SaiFrameType.TTS_OffsetEnd)
{
theFrame = new SaiTtsFrameOffsetEnd();
}
else if (theFrameType == SaiFrameType.TTS_AppData)
{
theFrame = new SaiTtsFrameAppData();
}
else if (theFrameType == SaiFrameType.EC_Start)
{
theFrame = new SaiEcFrameStart();
}
else if (theFrameType == SaiFrameType.EC_AppData)
{
theFrame = new SaiEcFrameApplication();
}
else if (theFrameType == SaiFrameType.EC_AppDataAskForAck)
{
theFrame = new SaiEcFrameAskForAck();
}
else if (theFrameType == SaiFrameType.EC_AppDataAcknowlegment)
{
theFrame = new SaiEcFrameAcknowlegment();
}
else
{
throw new InvalidOperationException(string.Format("无法解析指定的Sai帧，不可识别的类型{0}。", theFrameType));
}
theFrame.ParseBytes(bytes);
return(theFrame);
}
protected override void HandleTtsAppFrame(SaiTtsFrameAppData frame)
{
if (frame.UserData != null)
{
// 消息时延
var timeDelay = this.DefenseStrategy.CalcTimeDelay(frame);
// 通知网络数据事件
this.Context.Observer.OnSaiUserDataArrival(this.Context.RsspEP.RemoteID,
frame.UserData, timeDelay, MessageDelayDefenseTech.TTS);
}
}
private void SendResponseFrame()
{
var seq = (ushort)_ttsFrameTransport.NextSendSeq();
//
var reqFrame = new SaiTtsFrameAppData(seq,
TripleTimestamp.CurrentTimestamp,
_observer.RemoteLastSendTimestamp,
_observer.LocalLastRecvTimeStamp,
null);
_ttsFrameTransport.SendSaiFrame(reqFrame);
}
public void Test1()
{
var frameInital = new SaiTtsFrameAppData();
frameInital.SequenceNo = 100;
frameInital.SenderTimestamp = 1000;
frameInital.SenderLastRecvTimestamp = 900;
frameInital.ReceiverLastSendTimestamp = 800;
frameInital.UserData = new byte[] { 1, 2, 3 };
var bytes = frameInital.GetBytes();
var actual = SaiFrame.Parse(bytes) as SaiTtsFrameAppData;
Assert.AreEqual(frameInital.FrameType, actual.FrameType);
Assert.AreEqual(frameInital.SequenceNo, actual.SequenceNo);
Assert.AreEqual(frameInital.SenderTimestamp, actual.SenderTimestamp);
Assert.AreEqual(frameInital.SenderLastRecvTimestamp, actual.SenderLastRecvTimestamp);
Assert.AreEqual(frameInital.ReceiverLastSendTimestamp, actual.ReceiverLastSendTimestamp);
Assert.AreEqual(frameInital.UserData[0], actual.UserData[0]);
Assert.AreEqual(frameInital.UserData[1], actual.UserData[1]);
Assert.AreEqual(frameInital.UserData[2], actual.UserData[2]);
}
public void Test2()
{
var frameInital = new SaiTtsFrameAppData();
Assert.AreEqual(frameInital.UserDataLength, 0);
}
protected virtual void HandleTtsAppFrame(SaiTtsFrameAppData frame)
{
LogUtility.Error(string.Format("{0}: {1}.{2} not implement!",
this.Context.RsspEP.ID, this.GetType().Name,
new StackFrame(0).GetMethod().Name.Split('.').Last()));
}
