private static void Receive(ref NetworkPipelineContext ctx, ref InboundRecvBuffer inboundBuffer, ref NetworkPipelineStage.Requests requests)
{
var context = (SimulatorUtility.Context *)ctx.internalSharedProcessBuffer;
var param = *(SimulatorUtility.Parameters *)ctx.staticInstanceBuffer;
var simulator = new SimulatorUtility(param.MaxPacketCount, param.MaxPacketSize, param.PacketDelayMs, param.PacketJitterMs);
if (inboundBuffer.bufferLength > param.MaxPacketSize)
{
//UnityEngine.Debug.LogWarning("Incoming packet too large for internal storage buffer. Passing through. [buffer=" + inboundBuffer.Length + " packet=" + param->MaxPacketSize + "]");
// TODO: Add error code for this
return;
}
var timestamp = ctx.timestamp;
// Inbound buffer is empty if this is a resumed receive
if (inboundBuffer.bufferLength > 0)
{
context->PacketCount++;
if (simulator.ShouldDropPacket(context, param, timestamp))
{
context->PacketDropCount++;
inboundBuffer = default;
return;
}
var bufferVec = default(InboundSendBuffer);
bufferVec.bufferWithHeaders = inboundBuffer.buffer;
bufferVec.bufferWithHeadersLength = inboundBuffer.bufferLength;
bufferVec.buffer = inboundBuffer.buffer;
bufferVec.bufferLength = inboundBuffer.bufferLength;
bufferVec.headerPadding = 0;
if (context->PacketDelayMs == 0 ||
!simulator.DelayPacket(ref ctx, bufferVec, ref requests, timestamp))
{
return;
}
}
InboundSendBuffer returnPacket = default;
if (simulator.GetDelayedPacket(ref ctx, ref returnPacket, ref requests, timestamp))
{
inboundBuffer.buffer = returnPacket.bufferWithHeaders;
inboundBuffer.bufferLength = returnPacket.bufferWithHeadersLength;
return;
}
inboundBuffer = default;
}
private static void Receive(ref NetworkPipelineContext ctx, ref InboundRecvBuffer inboundBuffer, ref NetworkPipelineStage.Requests requests)
{
var inboundArray = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <byte>(inboundBuffer.buffer, inboundBuffer.bufferLength, Allocator.Invalid);
#if ENABLE_UNITY_COLLECTIONS_CHECKS
var safetyHandle = AtomicSafetyHandle.GetTempMemoryHandle();
NativeArrayUnsafeUtility.SetAtomicSafetyHandle(ref inboundArray, safetyHandle);
#endif
var reader = new DataStreamReader(inboundArray);
var oldSequenceId = (int *)ctx.internalProcessBuffer;
ushort sequenceId = reader.ReadUShort();
if (SequenceHelpers.GreaterThan16(sequenceId, (ushort)*oldSequenceId))
{
*oldSequenceId = sequenceId;
// Skip over the part of the buffer which contains the header
inboundBuffer = inboundBuffer.Slice(sizeof(ushort));
return;
}
inboundBuffer = default;
}
private static void Receive(ref NetworkPipelineContext ctx, ref InboundRecvBuffer inboundBuffer,
ref NetworkPipelineStage.Requests requests)
{
}
private static void Receive(ref NetworkPipelineContext ctx, ref InboundRecvBuffer inboundBuffer, ref NetworkPipelineStage.Requests requests)
{
// Request a send update to see if a queued packet needs to be resent later or if an ack packet should be sent
requests = NetworkPipelineStage.Requests.SendUpdate;
bool needsResume = false;
var header = default(ReliableUtility.PacketHeader);
var slice = default(InboundRecvBuffer);
ReliableUtility.Context * reliable = (ReliableUtility.Context *)ctx.internalProcessBuffer;
ReliableUtility.SharedContext *shared = (ReliableUtility.SharedContext *)ctx.internalSharedProcessBuffer;
shared->errorCode = 0;
if (reliable->Resume == ReliableUtility.NullEntry)
{
if (inboundBuffer.bufferLength <= 0)
{
inboundBuffer = slice;
return;
}
var inboundArray = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <byte>(inboundBuffer.buffer, inboundBuffer.bufferLength, Allocator.Invalid);
#if ENABLE_UNITY_COLLECTIONS_CHECKS
var safetyHandle = AtomicSafetyHandle.GetTempMemoryHandle();
NativeArrayUnsafeUtility.SetAtomicSafetyHandle(ref inboundArray, safetyHandle);
#endif
var reader = new DataStreamReader(inboundArray);
reader.ReadBytes((byte *)&header, UnsafeUtility.SizeOf <ReliableUtility.PacketHeader>());
if (header.Type == (ushort)ReliableUtility.PacketType.Ack)
{
ReliableUtility.ReadAckPacket(ctx, header);
inboundBuffer = default;
return;
}
var result = ReliableUtility.Read(ctx, header);
if (result >= 0)
{
var nextExpectedSequenceId = (ushort)(reliable->Delivered + 1);
if (result == nextExpectedSequenceId)
{
reliable->Delivered = result;
slice = inboundBuffer.Slice(UnsafeUtility.SizeOf <ReliableUtility.PacketHeader>());
if (needsResume = SequenceHelpers.GreaterThan16((ushort)shared->ReceivedPackets.Sequence,
(ushort)result))
{
reliable->Resume = (ushort)(result + 1);
}
}
else
{
ReliableUtility.SetPacket(ctx.internalProcessBuffer, result, inboundBuffer.Slice(UnsafeUtility.SizeOf <ReliableUtility.PacketHeader>()));
slice = ReliableUtility.ResumeReceive(ctx, reliable->Delivered + 1, ref needsResume);
}
}
}
else
{
slice = ReliableUtility.ResumeReceive(ctx, reliable->Resume, ref needsResume);
}
if (needsResume)
{
requests |= NetworkPipelineStage.Requests.Resume;
}
inboundBuffer = slice;
}
private static void Receive(ref NetworkPipelineContext ctx, ref InboundRecvBuffer inboundBuffer, ref NetworkPipelineStage.Requests requests)
{
var fragContext = (FragContext *)ctx.internalProcessBuffer;
var dataBuffer = ctx.internalProcessBuffer + sizeof(FragContext);
var param = (FragmentationUtility.Parameters *)ctx.staticInstanceBuffer;
var inboundArray = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray <byte>(inboundBuffer.buffer, inboundBuffer.bufferLength, Allocator.Invalid);
#if ENABLE_UNITY_COLLECTIONS_CHECKS
var safetyHandle = AtomicSafetyHandle.GetTempMemoryHandle();
NativeArrayUnsafeUtility.SetAtomicSafetyHandle(ref inboundArray, safetyHandle);
#endif
var reader = new DataStreamReader(inboundArray);
var combined = reader.ReadShort();
var foundSequence = combined & (int)FragFlags.SeqMask;
var flags = (FragFlags)combined & ~FragFlags.SeqMask;
inboundBuffer = inboundBuffer.Slice(FragHeaderCapacity);
var expectedSequence = fragContext->sequence;
var isFirst = 0 != (flags & FragFlags.First);
var isLast = 0 != (flags & FragFlags.Last);
if (isFirst)
{
expectedSequence = foundSequence;
fragContext->packetError = false;
fragContext->endIndex = 0;
}
if (foundSequence != expectedSequence)
{
// We've missed a packet.
fragContext->packetError = true;
fragContext->endIndex = 0; // Discard data we have already collected
}
if (!fragContext->packetError)
{
if (!isLast || fragContext->endIndex > 0)
{
if (fragContext->endIndex + inboundBuffer.bufferLength > param->PayloadCapacity)
{
throw new InvalidOperationException($"Fragmentation capacity exceeded");
}
// Append the data to the end
UnsafeUtility.MemCpy(dataBuffer + fragContext->endIndex, inboundBuffer.buffer, inboundBuffer.bufferLength);
fragContext->endIndex += inboundBuffer.bufferLength;
}
if (isLast && fragContext->endIndex > 0)
{
// Data is complete
inboundBuffer = new InboundRecvBuffer
{
buffer = dataBuffer,
bufferLength = fragContext->endIndex
};
}
}
if (!isLast || fragContext->packetError)
{
// No output if we expect more data, or if data is incomplete due to packet loss
inboundBuffer = default;
}
fragContext->sequence = (foundSequence + 1) & (int)FragFlags.SeqMask;
}
