/// <summary> Handles a stream based on its header/size. Determines if it should be buffered if out-of-order,
/// acked and released if size is equal to header size (ack only), or delivered immediately. </summary>
internal void RouteIncomingStream(NetStream strm)
{
var header = NetHeader.FromStream(strm);
int seqDist = NetMath.SeqDistance(header.ObjSequence, LastAcceptedRemoteSequence);
// If the stream is only the size of a header, it's likely a forced ack:
if (strm.Length <= 120)
{
AckDelivered(header);
strm.Release();
}
else if (!RemoteSequenceValid(seqDist))
{
strm.Release();
}
else if (seqDist != 1)
{
BufferOutOfOrder(seqDist, strm, header);
}
else
{
AckReceived(header);
AckDelivered(header);
DeliverStream(strm);
}
}
/// <summary> Adds an out-of-order datagram to the buffer to await future delivery. </summary>
private void BufferOutOfOrder(int seqDist, NetStream strm, NetHeader header)
{
if (recvBuffer.Count >= 512)
{
Connection.Disconnect();
return;
}
if (recvBufferSeqDist.Contains(seqDist))
{
strm.Release();
return;
}
// Ack history window is only 64 bits, so only ack if within window:
if (seqDist < 64)
{
AckReceived(header);
AckDelivered(header);
}
else
{
strm.Pos = 1; // Reset to 1 so header can be reprocessed when seqDist < 64
}
recvBuffer.Add(strm);
recvBufferSeqDist.Add(seqDist);
}
internal void TriggerReadInstantiateData(NetStream stream)
{
if (OnReadInstantiateData != null)
{
OnReadInstantiateData(stream);
}
stream.Release();
}
internal void TriggerReadSync(NetStream stream)
{
if (OnReadSync != null)
{
OnReadSync(stream);
}
stream.Release();
}
/// <summary> Removes acked messages from the send window, releases the stream, updates connection ping, and
/// increments the Delivered stat. </summary>
private void MessageDelivered(int index, NetHeader header)
{
Delivered++;
NetStream strm = reliableWindow[sendWindow[index]];
if (header.AckTime > 0)
{
Connection.UpdatePing(NetTime.Milliseconds(), sendWindowTime[index], header.AckTime);
}
reliableWindow.Remove(sendWindow[index]);
sendWindow.RemoveAt(index);
sendWindowTime.RemoveAt(index);
strm.Release();
}
/// <summary> Deserializes incoming reliable stream into NetMessages, forwards them to the NetSocket, releases the stream,
/// increments the remote sequence, and retries the out-of-order buffer when needed. </summary>
private void DeliverStream(NetStream strm)
{
// Deserialize stream into individual messages and pass them to the socket:
while (NetSerializer.CanReadMessage(strm))
{
var message = NetSerializer.ReadNetMessage(strm);
if (message == null)
{
NetLog.Error("Failed to parse reliable message from: " + Connection.Endpoint + " Pos: " + strm.Pos + " Size: " + strm.Size);
break;
}
Connection.Socket.ReceiveMessage(message, Connection);
}
// Return stream to pool and update receive buffer distances:
strm.Release();
LastAcceptedRemoteSequence++;
if (recvBuffer.Count > 0)
{
DecrementReceiveBuffer();
}
}
/// <summary> Adds an out-of-order datagram to the buffer to await future delivery. </summary>
private void BufferOutOfOrder(int seqDist, NetStream strm, NetHeader header) {
if (recvBuffer.Count >= 512) {
Connection.Disconnect();
return;
}
if (recvBufferSeqDist.Contains(seqDist)) {
strm.Release();
return;
}
// Ack history window is only 64 bits, so only ack if within window:
if (seqDist < 64) {
AckReceived(header);
AckDelivered(header);
}
else strm.Pos = 1; // Reset to 1 so header can be reprocessed when seqDist < 64
recvBuffer.Add(strm);
recvBufferSeqDist.Add(seqDist);
}
/// <summary> Deserializes incoming reliable stream into NetMessages, forwards them to the NetSocket, releases the stream,
/// increments the remote sequence, and retries the out-of-order buffer when needed. </summary>
private void DeliverStream(NetStream strm) {
// Deserialize stream into individual messages and pass them to the socket:
while (NetSerializer.CanReadMessage(strm)) {
var message = NetSerializer.ReadNetMessage(strm);
if (message == null) {
NetLog.Error("Failed to parse reliable message from: " + Connection.Endpoint + " Pos: " + strm.Pos + " Size: " + strm.Size);
break;
}
Connection.Socket.ReceiveMessage(message, Connection);
}
// Return stream to pool and update receive buffer distances:
strm.Release();
LastAcceptedRemoteSequence++;
if (recvBuffer.Count > 0) DecrementReceiveBuffer();
}
/// <summary> Handles a stream based on its header/size. Determines if it should be buffered if out-of-order,
/// acked and released if size is equal to header size (ack only), or delivered immediately. </summary>
internal void RouteIncomingStream(NetStream strm) {
var header = NetHeader.FromStream(strm);
int seqDist = NetMath.SeqDistance(header.ObjSequence, LastAcceptedRemoteSequence);
// If the stream is only the size of a header, it's likely a forced ack:
if (strm.Length <= 120) {
AckDelivered(header);
strm.Release();
}
else if (!RemoteSequenceValid(seqDist)) strm.Release();
else if (seqDist != 1) BufferOutOfOrder(seqDist, strm, header);
else {
AckReceived(header);
AckDelivered(header);
DeliverStream(strm);
}
}
