private void read_impl(IBaseClient client, SuperPacket <PQ> superpacket, IMarshal marshal)
{
SuperPacketReader reader = client.popPendingSuperPacket();
// Handshake process skips all procedures, including order
if (reader.HasFlag(SuperPacketFlags.Handshake))
{
// Nothing to do here, it's a handshake packet
// TODO(gpascualg): We don't need to add them at all
LastTickIdRead = reader.tickId();
return;
}
Debug.Assert(!IsOutOfOrder(reader.tickId()), "Should never have out of order packets");
if (Overflow.sub(ExpectedTickId, reader.tickId()) > Constants.MaximumBlocksUntilResync)
{
superpacket.SetFlag(SuperPacketFlags.Handshake);
}
if (LastTickIdRead > reader.tickId())
{
loopCounter = (byte)(loopCounter + 1);
}
LastTickIdRead = reader.tickId();
reader.handlePackets <PQ, IBaseClient>(this, marshal, client);
}
private void onReceivedImpl(ushort tickId, SuperPacketReader reader)
{
if (DropRecv())
{
return;
}
if (protocol.IsOutOfOrder(reader.tickId()) && !reader.HasFlag(SuperPacketFlags.Handshake))
{
return;
}
// Add to pending list
pendingPackets.Add(reader);
lastPacketID = reader.id();
lastPacketSize = reader.size();
// Handle all acks already
protocol.HandleAcks(tickId, reader, superPacket, marshal);
}
public void HandleAcks(ushort tickId, SuperPacketReader reader, SuperPacket <PQ> superpacket, IMarshal marshal)
{
// Ack packets
foreach (ushort ack in reader.getAcks())
{
// Check if this ack > lastAck
if (Kaminari.Overflow.ge(ack, processedAckBase))
{
int displace = Kaminari.Overflow.sub(ack, processedAckBase);
processedAcks = processedAcks << displace;
processedAckBase = ack;
}
// Now, check if the ack has already been processed
int ackPosition = Overflow.sub(processedAckBase, ack);
if (ackPosition >= 64)
{
ackPosition = 0;
processedAcks = 0;
processedAckBase = ack;
}
// If it is already masked, it means it has already been processed
ulong ackMask = (ulong)1 << ackPosition;
if ((processedAcks & ackMask) > 0)
{
continue;
}
processedAcks = processedAcks | ackMask;
// Otherwise, let superpacker handle the ack
superpacket.Ack(ack);
// Update lag estimation
if (Overflow.geq(lastConfirmedTimestampId, ack) && Overflow.sub(timestampsHeadId, lastConfirmedTimestampId) < 100)
{
// TODO(gpascualg): This can be used as a connection quality estimate
continue;
}
lastConfirmedTimestampId = ack;
ushort position = Overflow.mod(Overflow.sub(timestampsHeadPosition, Overflow.sub(timestampsHeadId, ack)), ResolutionTableSize);
ulong diff = reader.Timestamp - timestamps[position];
UnityEngine.Debug.Log($"> ACK {ack} AT {position} +{diff}");
const float w = 0.99f;
estimatedRTT = estimatedRTT * w + diff * (1.0f - w);
}
// Schedule ack if necessary
bool is_handshake = reader.HasFlag(SuperPacketFlags.Handshake);
if (is_handshake || reader.hasData() || reader.isPingPacket())
{
superpacket.scheduleAck(reader.id());
}
// Handle flags already
if (is_handshake)
{
// Check if there was too much of a difference, in which case, flag handshake again
// TODO(gpascualg): Remove re-handshake max diff magic number
if (Overflow.abs_diff(reader.tickId(), tickId) > 10)
{
superpacket.SetFlag(SuperPacketFlags.Handshake);
}
// During handshake, we update our tick to match the other side
ExpectedTickId = reader.tickId();
LastServerId = reader.tickId();
// Reset all variables related to packet parsing
timestampBlockId = ExpectedTickId;
timestamp = DateTimeExtensions.now();
loopCounter = 0;
// Reset marshal
ResetResolutionTable(reader.tickId());
marshal.Reset();
if (!reader.HasFlag(SuperPacketFlags.Ack))
{
superpacket.SetFlag(SuperPacketFlags.Ack);
superpacket.SetFlag(SuperPacketFlags.Handshake);
}
}
}