internal void AddPacket(RUDPIngoingPacket packet)
{
lock (_lock)
{
if (packet.PacketId < 0)
{
_list.AddLast(packet);
return;
}
LinkedListNode<RUDPIngoingPacket> node = _list.Last;
while (node != null && (node.Value.PacketId < 0 || packet.PacketId < node.Value.PacketId))
node = node.Previous;
if (node == null)
{
_list.AddFirst(packet);
return;
}
// If duplicated packet -> drop
if (packet.PacketId == node.Value.PacketId)
return;
// Add
_list.AddAfter(node, packet);
}
}
internal void OnReceive(RUDPIngoingPacket packet)
{
if (packet != null)
{
Interlocked.Exchange(ref _rwnd, _rwnd + packet.Payload.Length);
}
}
internal void AddPacket(RUDPIngoingPacket packet)
{
lock (_lock)
{
if (packet.PacketId < 0)
{
_list.AddLast(packet);
return;
}
LinkedListNode <RUDPIngoingPacket> node = _list.Last;
while (node != null && (node.Value.PacketId < 0 || packet.PacketId < node.Value.PacketId))
{
node = node.Previous;
}
if (node == null)
{
_list.AddFirst(packet);
return;
}
// If duplicated packet -> drop
if (packet.PacketId == node.Value.PacketId)
{
return;
}
// Add
_list.AddAfter(node, packet);
}
}
internal void AddPacket(RUDPIngoingPacket packet)
{
if (packet.PacketId < 0)
{
_lock.EnterWriteLock();
_list.AddLast(packet);
_lock.ExitWriteLock();
return;
}
_lock.EnterUpgradeableReadLock();
try
{
LinkedListNode <RUDPIngoingPacket> node = _list.Last;
while (node != null && (node.Value.PacketId < 0 || packet.PacketId < node.Value.PacketId))
{
node = node.Previous;
}
if (node == null)
{
_lock.EnterWriteLock();
_list.AddFirst(packet);
_lock.ExitWriteLock(); // Needed ?
return;
}
// If duplicated packet -> drop
if (packet.PacketId == node.Value.PacketId)
{
return;
}
// Add
_lock.EnterWriteLock();
_list.AddAfter(node, packet);
_lock.ExitWriteLock(); // Needed ?
}
finally
{
_lock.ExitUpgradeableReadLock();
}
}
internal void AddPacket(RUDPIngoingPacket packet)
{
if (packet.PacketId < 0)
{
_lock.EnterWriteLock();
_list.AddLast(packet);
_lock.ExitWriteLock();
return;
}
_lock.EnterUpgradeableReadLock();
try
{
LinkedListNode<RUDPIngoingPacket> node = _list.Last;
while (node != null && (node.Value.PacketId < 0 || packet.PacketId < node.Value.PacketId))
node = node.Previous;
if (node == null)
{
_lock.EnterWriteLock();
_list.AddFirst(packet);
_lock.ExitWriteLock(); // Needed ?
return;
}
// If duplicated packet -> drop
if (packet.PacketId == node.Value.PacketId)
return;
// Add
_lock.EnterWriteLock();
_list.AddAfter(node, packet);
_lock.ExitWriteLock(); // Needed ?
}
finally
{
_lock.ExitUpgradeableReadLock();
}
}
internal void OnReceiveProcessed(RUDPIngoingPacket packet)
{
Interlocked.Exchange(ref _rwnd, _rwnd - packet.Payload.Length);
}
internal void OnReceive(RUDPIngoingPacket packet)
{
if (packet != null)
Interlocked.Exchange(ref _rwnd, _rwnd + packet.Payload.Length);
}
private static void HandlePacket(PhysicalSocket physical,
IPEndPoint sender,
RUDPPacketChannel channel,
int packetId,
int advertisedWindowSize,
SACKSlot slot1, SACKSlot slot2, SACKSlot slot3, SACKSlot slot4,
byte[] payload)
{
RUDPSocket rudp = null;
//---- PING
if (channel == RUDPPacketChannel.Ping || channel == RUDPPacketChannel.PingRendezVous)
{
rudp = HandlePing(physical, sender, packetId, channel);
// Do not handle this message
if (rudp == null)
return;
}
//---- Search the socket
if (rudp == null)
{
physical._connectedRDUPsLock.EnterReadLock();
physical._connectedRDUPs.TryGetValue(sender, out rudp);
physical._connectedRDUPsLock.ExitReadLock();
}
//---- Direct send of ACK, because socket can be shutdowned and removed
if (channel == RUDPPacketChannel.TearDown)
{
byte[] packetPayload = MakePacketPayload(rudp, -1, RUDPPacketChannel.ACK, new SACKSlot(packetId, packetId), null, null, null, null, 0, 0);
SocketSendACK(rudp, physical, sender, packetPayload);
PayloadManager.Deallocate(RUDPPacketChannel.ACK, packetPayload);
}
//---- Released socket
if (rudp == null)
return;
#if CONSOLE_TRACE
if (packetId > -1)
Trace("Handle packet (" + rudp.Handle + ")(" + channel + "):" + packetId);
#endif
//---- Advertised window
rudp._controlWindow.OnReceiveAdvertisedWindow(advertisedWindowSize);
//---- Handle ACKs
HandleACKs(rudp, slot1, slot2, slot3, slot4);
if (channel == RUDPPacketChannel.ACK)
return;
//---- Non reliable messages
if (packetId < 0)
{
//-- Bandwidth
if (channel == RUDPPacketChannel.Bandwidth01)
{
PushPacketToSend(rudp, false, RUDPPacketChannel.BandwidthResponse01, null, 0, 0);
return;
}
else if (channel == RUDPPacketChannel.Bandwidth02)
{
PushPacketToSend(rudp, false, RUDPPacketChannel.BandwidthResponse02, payload, 0, 8);
return;
}
else if (channel == RUDPPacketChannel.BandwidthResponse01)
{
rudp._bandwidthResponse01TS = HiResTimer.MicroSeconds;
}
else if (channel == RUDPPacketChannel.BandwidthResponse02)
{
//---- Calculate bandwidth
// Bdw (Bytes / milli-sec)
long now = HiResTimer.MicroSeconds;
double delay = (now - rudp._bandwidthResponse01TS) / 1000;
if (delay < 0.001)
delay = 0.001;
// Arrival Speed
double arrivalSpeed = (RUDPHeaderLength + UDPHeaderLength) / delay;
// RTT
double currentRtt = (now - BinaryHelper.ReadInt(payload, 0)) / 1000;
if (currentRtt < 0.001)
currentRtt = 0.001;
// BDP = Bandwidth(Byte / Ms) * RTT;
double bandwidth = (long)(arrivalSpeed * currentRtt);
rudp._bandwidth = (long)(rudp._bandwidth * 0.875f + bandwidth * 0.125f);
}
//-- MTU Tuning
else if (channel == RUDPPacketChannel.MTUTuning)
{
rudp._pmtuDiscovery.OnReceiveProbe(payload.Length);
return;
}
else if (channel == RUDPPacketChannel.MTUTuningACK)
{
rudp._pmtuDiscovery.OnReceiveProbeACK(payload);
return;
}
//if ((rudp._incomingNonReliablePackets.Count * rudp._mtu) >= rudp._receiveSize)
//return;
RUDPIngoingPacket nonReliablePacket = new RUDPIngoingPacket(rudp, packetId, payload, channel, HiResTimer.MicroSeconds);
rudp._incomingPackets.AddPacket(nonReliablePacket);
rudp.HandleNextUserPacket(false);
return;
}
//---- Do not process a duplicated packets
bool isDuplicatedPacket;
isDuplicatedPacket = (packetId <= rudp._incomingPackets.CurrentPacketId);
if (!isDuplicatedPacket)
isDuplicatedPacket = rudp._incomingPackets.ContainsPacket(packetId);
//---- Can I receive the packet now ?
bool canReceive = rudp._controlWindow.CanReceive(packetId, payload.Length);
//---- Send the ACK
if (channel != RUDPPacketChannel.Ping && channel != RUDPPacketChannel.PingRendezVous)
if (canReceive || // Can receive, then we send ACK
(!canReceive && isDuplicatedPacket)) // Is duplicated, then already in the list -> send another ACK
rudp._sackWindow.OnReceivePacket(packetId);
//---- Check if we can handle this message
if (!canReceive || isDuplicatedPacket)
return;
//---- If we are not connected, we cannot hanlde messages ! We need a connection before.
if (rudp._status != RUDPSocketStatus.Connected && channel == RUDPPacketChannel.UserPacket)
return;
//---- Check for Out of order packets
if (rudp._incomingPackets.Count > 0)
{
int greaterPacketId = rudp._incomingPackets.LastPacketId;
if (packetId != greaterPacketId + 1)
{
byte[] oooPayload = new byte[8];
// start packet
BinaryHelper.WriteInt(greaterPacketId + 1, oooPayload, 0);
// end packet
BinaryHelper.WriteInt(packetId - 1, oooPayload, 4);
PushPacketToSend(rudp, false, RUDPPacketChannel.OutOfOrder, oooPayload, 0, 8);
}
}
//---- Receive Out of order notification
if (channel == RUDPPacketChannel.OutOfOrder)
{
rudp._controlWindow.OnOutOfOrder(BinaryHelper.ReadInt(payload, 0), BinaryHelper.ReadInt(payload, 4));
}
//---- TEAR DOWN
if (channel == RUDPPacketChannel.TearDown)
{
// Initiate the close process
if (rudp._status == RUDPSocketStatus.Connected)
{
// Notify control window
rudp._controlWindow.OnReceive(null);
// Start shutdown
AsyncShutdown(rudp);
}
return;
}
//---- Add the packet to incoming list
RUDPIngoingPacket packet = new RUDPIngoingPacket(rudp, packetId, payload, channel, HiResTimer.MicroSeconds);
// Notify control window
rudp._controlWindow.OnReceive(packet);
rudp._incomingPackets.AddPacket(packet);
//------ Handle the ordered ingoing packets
rudp.HandleNextUserPacket(false);
}
internal void OnReceiveProcessed(RUDPIngoingPacket packet)
{
Interlocked.Exchange(ref _rwnd, _rwnd - packet.Payload.Length);
}
internal void HandleNextUserPacket(bool forceAsyncCall)
{
if (_asyncResultReceive == null)
{
return;
}
RUDPReceiveIAsyncResult asyncResult;
RUDPIngoingPacket packet = null;
lock (_handleNextUserPacketLock)
{
if (_incomingPackets.Count < 1)
{
return;
}
asyncResult = _asyncResultReceive;
if (_asyncResultReceive == null)
{
return;
}
//-- Clean the list
while (_incomingPackets.Count > 0)
{
// Get the current packet
packet = _incomingPackets.RemoveNextPacket();
// No more packet
if (packet == null)
{
return;
}
// Ordered packet
if (packet.Channel != RUDPPacketChannel.UserPacket)
{
_controlWindow.OnReceiveProcessed(packet);
}
else
{
break; // It is the next message to process.
}
}
//---- Check it is not null
if (packet == null)
{
return;
}
_asyncResultReceive = null;
}
//---- Receive
if (asyncResult != null)
{
_controlWindow.OnReceiveProcessed(packet);
OnEndReceive(RUDPSocketError.Success, packet, forceAsyncCall, asyncResult);
}
}
internal void OnEndReceive(RUDPSocketError error, RUDPIngoingPacket packet, bool forceAsyncCall, RUDPReceiveIAsyncResult asyncResult)
{
asyncResult.Packet = packet;
asyncResult.ForceAsyncCall = forceAsyncCall;
asyncResult.SetAsCompleted(error, false);
}
internal void OnEndReceive(RUDPSocketError error, RUDPIngoingPacket packet, bool forceAsyncCall, RUDPReceiveIAsyncResult asyncResult)
{
asyncResult.Packet = packet;
asyncResult.ForceAsyncCall = forceAsyncCall;
asyncResult.SetAsCompleted(error, false);
}