public void ByeEncode()
{
// Define variables
ByePacket p1 = new ByePacket();
string encodedString = p1.Encode(true);
// Check result
Assert.AreEqual("b", encodedString, "Bye message didn't encode correctly");
}
public void ByeDecode()
{
// Define variables
ByePacket p1 = new ByePacket();
string encodedString = p1.Encode(true);
// Try to decode packet
try
{
ByePacket p2 = ByePacket.Decode(encodedString);
}
catch (System.Exception e)
{
Assert.Fail("Bye packet exception: " + e.Message);
}
}
// This function is meant to be run in its own thread
// Is writes and reads Packets to/from the UdpClient
private void _networkRun()
{
if (!_running.Value)
{
return;
}
Console.WriteLine("[Server] Waiting for UDP datagrams on port {0}", Port);
while (_running.Value)
{
bool canRead = _udpClient.Available > 0;
int numToWrite = _outgoingMessages.Count;
int numToDisconnect = _sendByePacketTo.Count;
// Get data if there is some
if (canRead)
{
// Read in one datagram
IPEndPoint ep = new IPEndPoint(IPAddress.Any, 0);
byte[] data = _udpClient.Receive(ref ep); // Blocks
// Enque a new message
NetworkMessage nm = new NetworkMessage();
nm.Sender = ep;
nm.Packet = new Packet(data);
nm.ReceiveTime = DateTime.Now;
_incomingMessages.Enqueue(nm);
//Console.WriteLine("RCVD: {0}", nm.Packet);
}
// Write out queued
for (int i = 0; i < numToWrite; i++)
{
// Send some data
Tuple <Packet, IPEndPoint> msg;
bool have = _outgoingMessages.TryDequeue(out msg);
if (have)
{
msg.Item1.Send(_udpClient, msg.Item2);
}
//Console.WriteLine("SENT: {0}", msg.Item1);
}
// Notify clients of Bye
for (int i = 0; i < numToDisconnect; i++)
{
IPEndPoint to;
bool have = _sendByePacketTo.TryDequeue(out to);
if (have)
{
ByePacket bp = new ByePacket();
bp.Send(_udpClient, to);
}
}
// If Nothing happened, take a nap
if (!canRead && (numToWrite == 0) && (numToDisconnect == 0))
{
Thread.Sleep(1);
}
}
Console.WriteLine("[Server] Done listening for UDP datagrams");
// Wait for all arena's thread to join
Queue <Arena> arenas = new Queue <Arena>(_activeArenas.Keys);
if (arenas.Count > 0)
{
Console.WriteLine("[Server] Waiting for active Areans to finish...");
foreach (Arena arena in arenas)
{
arena.JoinThread();
}
}
// See which clients are left to notify of Bye
if (_sendByePacketTo.Count > 0)
{
Console.WriteLine("[Server] Notifying remaining clients of shutdown...");
// run in a loop until we've told everyone else
IPEndPoint to;
bool have = _sendByePacketTo.TryDequeue(out to);
while (have)
{
ByePacket bp = new ByePacket();
bp.Send(_udpClient, to);
have = _sendByePacketTo.TryDequeue(out to);
}
}
}
private void Start()
{
//BufferChunk chunk = new BufferChunk(2048);
CompoundPacket compoundPacket = new CompoundPacket();
EndPoint endPoint = null;
while (isRunning)
{
try
{
compoundPacket.Reset();
udpListener.ReceiveFrom(compoundPacket.Buffer, out endPoint);
compoundPacket.ParseBuffer();
//IPAddress ipAddress = ((IPEndPoint)endPoint).Address;
IPEndPoint ipEndpoint = (IPEndPoint)endPoint;
// The compound packet enumerator destroys its list during enumeration,
// so we keep track of packets that have yet to be processed
IList <RtcpPacket> yetToBeProcessed = new List <RtcpPacket>();
String venueName = null;
//uint ssrc = 0;
long when = 0; // in units of "ticks"
// scan through the compound packet, looking for key pieces of meta-data
// first, look for the app packet that specifies the venue
// also, obtain the ssrc and the time stamp
foreach (RtcpPacket packet in compoundPacket)
{
if (packet.PacketType == (byte)Rtcp.PacketType.APP)
{
AppPacket appPacket = new AppPacket(packet);
if (appPacket.Name.Equals(Rtcp.APP_PACKET_NAME) &&
appPacket.Subtype == Rtcp.VENUE_APP_PACKET_SUBTYPE)
{
BufferChunk chunk = new BufferChunk(appPacket.Data);
when = chunk.NextInt64();
venueName = chunk.NextUtf8String(chunk.Length);
int padIndex = venueName.IndexOf((char)0);
if (padIndex > 0)
{
venueName = venueName.Substring(0, padIndex);
}
}
}
else
{
yetToBeProcessed.Add(packet);
}
}
if (venueName == null)
{
continue; // can't do anything if we don't know the venue for this packet
}
if (when == 0)
{
continue; // need a timestamp
}
VenueState venueState = null;
// compound operations must always be locked...
lock (venueStateMap)
{
if (!venueStateMap.ContainsKey(venueName))
{
venueState = new VenueState(venueName);
}
else
{
venueState = venueStateMap[venueName];
}
}
// scan again, this time processing the RTCP packets
foreach (RtcpPacket packet in yetToBeProcessed)
{
switch (packet.PacketType)
{
case (byte)Rtcp.PacketType.SR:
{
SrPacket sr = new SrPacket(packet);
SenderData senderData = venueState.GetSenderState(sr.SSRC);
senderData.Source = ipEndpoint;
senderData.updateSenderState(sr.SenderReport, when);
// this "refreshes" the host state (so that it won't expire)
venueState.SenderData[sr.SSRC] = senderData;
break;
}
case (byte)Rtcp.PacketType.RR:
{
RrPacket rr = new RrPacket(packet);
ReceiverData receiverData = venueState.GetReceiverData(ipEndpoint);
// currently, we replace all receiver summaries with the data
// from a single RR packet
receiverData.updateReceiverState(rr.ReceiverReports, when, venueState);
// this "refreshes" the host state (so that it won't expire)
venueState.ReceiverData[ipEndpoint] = receiverData;
break;
}
case (byte)Rtcp.PacketType.SDES:
{
SdesPacket sdp = new SdesPacket(packet);
foreach (SdesReport report in sdp.Reports())
{
SenderData senderData = venueState.GetSenderState(report.SSRC);
senderData.CName = report.SdesData.CName;
senderData.Source = ipEndpoint;
// this "refreshes" the host state (so that it won't expire)
venueState.SenderData[report.SSRC] = senderData;
ReceiverData receiverData =
venueState.GetReceiverDataWithoutCreating(ipEndpoint);
if (receiverData != null)
{
receiverData.CName = report.SdesData.CName;
}
}
break;
}
case (byte)Rtcp.PacketType.BYE:
{
//BYE packets occur when capabilities stop. Clean out sender data only for the
//ssrc's affected. We leave receiver reports alone for now.
ByePacket byePacket = new ByePacket(packet);
foreach (uint ssrc in byePacket.SSRCs)
{
venueState.SenderData.Remove(ssrc);
}
//Set a flag to cause the matrix for this venue to be rebuilt on the next request.
venueState.ParticipantChange = true;
continue;
}
case (byte)Rtcp.PacketType.APP:
{
// ignored
break;
}
}
} // foreach packet...
// refresh the venue state
venueStateMap[venueName] = venueState;
}
catch (Exception e)
{
Console.Out.WriteLine("Exception : " + e.ToString());
writeEventLog("Exception in receive thread: " + e.ToString(), EventLogEntryType.Warning);
}
} // loop forever...
}
/// <summary>
/// A ByePacket can contain multiple SSRCs so we need to process them in a loop
/// </summary>
/// <param name="packet">ByePacket</param>
/// <param name="ipAddress">IPAddress packet was received from</param>
private void ProcessBYEPacket(ByePacket packet, IPAddress ipAddress)
{
// Remove stream does a special form of AddSsrcToIp
// to try and prevent mischievous programming
foreach(uint ssrc in packet.SSRCs)
{
RemoveSSRC(ssrc, ipAddress);
}
}
