/// <summary>
/// Send a message to this exact same netpeer (loopback).
/// </summary>
public void SendUnconnectedToSelf(NetOutgoingMessage message)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
message.AssertNotSent(nameof(message));
if (Socket == null)
{
throw new InvalidOperationException("No socket bound.");
}
message._messageType = NetMessageType.Unconnected;
message._isSent = true;
if (!Configuration.IsMessageTypeEnabled(NetIncomingMessageType.UnconnectedData))
{
return; // dropping unconnected message since it's not enabled for receiving
}
var om = CreateIncomingMessage(NetIncomingMessageType.UnconnectedData);
om.Write(message);
om.IsFragment = false;
om.ReceiveTime = NetTime.Now;
om.SenderConnection = null;
om.SenderEndPoint = Socket.LocalEndPoint as IPEndPoint;
LidgrenException.Assert(om.BitLength == message.BitLength);
ReleaseMessage(om);
}
// public double LastSendRespondedTo { get { return m_connection.m_lastSendRespondedTo; } }
internal void PacketSent(int numBytes, int numMessages)
{
LidgrenException.Assert(numBytes > 0 && numMessages > 0);
_sentPackets++;
_sentBytes += numBytes;
_sentMessages += numMessages;
}
internal void PacketReceived(int numBytes, int numMessages, int numFragments)
{
LidgrenException.Assert(numBytes > 0 && numMessages > 0);
_receivedPackets++;
_receivedBytes += numBytes;
_receivedMessages += numMessages;
_receivedFragments += numFragments;
}
public override int GetAllowedSends()
{
int retval = _windowSize - NetUtility.PowOf2Mod(
_sendStart + NetConstants.SequenceNumbers - _windowStart,
NetConstants.SequenceNumbers);
LidgrenException.Assert(retval >= 0 && retval <= _windowSize);
return(retval);
}
// send message immediately
internal void SendLibraryMessage(NetOutgoingMessage message, IPEndPoint recipient)
{
AssertIsOnLibraryThread();
LidgrenException.Assert(!message._isSent);
int length = 0;
message.Encode(_sendBuffer, ref length, 0);
SendPacket(length, recipient, 1);
}
/// <summary>
/// Compress (lossy) a <see cref="float"/> in the range 0..1 using the specified amount of bits.
/// </summary>
public static void WriteUnit(this IBitBuffer buffer, float value, int bitCount)
{
LidgrenException.Assert(
(value >= 0.0) && (value <= 1.0),
" WriteUnitSingle() must be passed a float in the range 0 to 1; val is " + value);
int maxValue = (1 << bitCount) - 1;
uint writeVal = (uint)(value * maxValue);
buffer.Write(writeVal, bitCount);
}
/// <summary>
/// Compress a <see cref="float"/> within a specified range using the specified amount of bits.
/// </summary>
public static void WriteRanged(this IBitBuffer buffer, float value, float min, float max, int bitCount)
{
LidgrenException.Assert(
(value >= min) && (value <= max),
" WriteRangedSingle() must be passed a float in the range MIN to MAX; val is " + value);
float range = max - min;
float unit = (value - min) / range;
int maxVal = (1 << bitCount) - 1;
buffer.Write((uint)(maxVal * unit), bitCount);
}
/// <summary>
/// Compress (lossy) a <see cref="float"/> in the range -1..1 using the specified amount of bits.
/// </summary>
public static void WriteSigned(this IBitBuffer buffer, float value, int bitCount)
{
LidgrenException.Assert(
(value >= -1.0) && (value <= 1.0),
" WriteSignedSingle() must be passed a float in the range -1 to 1; val is " + value);
float unit = (value + 1f) * 0.5f;
int maxVal = (1 << bitCount) - 1;
uint writeVal = (uint)(unit * maxVal);
buffer.Write(writeVal, bitCount);
}
/// <summary>
/// Writes an <see cref="int"/> with the least amount of bits needed for the specified range.
/// Returns the number of bits written.
/// </summary>
public static int WriteRanged(this IBitBuffer buffer, int min, int max, int value)
{
LidgrenException.Assert(value >= min && value <= max, "Value not within min/max range!");
uint range = (uint)(max - min);
int numBits = NetBitWriter.BitsForValue(range);
uint rvalue = (uint)(value - min);
buffer.Write(rvalue, numBits);
return(numBits);
}
public override int GetAllowedSends()
{
if (!_doFlowControl)
{
return(int.MaxValue);
}
int value = _windowSize - NetUtility.PowOf2Mod(
_sendStart + NetConstants.SequenceNumbers - _windowStart,
_windowSize);
LidgrenException.Assert(value >= 0 && value <= _windowSize);
return(value);
}
// remoteWindowStart is remote expected sequence number; everything below this has arrived properly
// seqNr is the actual nr received
public override NetSocketResult ReceiveAcknowledge(TimeSpan now, int seqNr)
{
if (!_doFlowControl)
{
// we have no use for acks on this channel since we don't respect the window anyway
_connection.Peer.LogWarning(new NetLogMessage(NetLogCode.SuppressedUnreliableAck, endPoint: _connection));
return(new NetSocketResult(true, false));
}
// late (dupe), on time or early ack?
int relate = NetUtility.RelativeSequenceNumber(seqNr, _windowStart);
if (relate < 0)
{
//m_connection.m_peer.LogDebug("Received late/dupe ack for #" + seqNr);
return(new NetSocketResult(true, false)); // late/duplicate ack
}
if (relate == 0)
{
//m_connection.m_peer.LogDebug("Received right-on-time ack for #" + seqNr);
// ack arrived right on time
LidgrenException.Assert(seqNr == _windowStart);
_receivedAcks[_windowStart] = false;
_windowStart = NetUtility.PowOf2Mod(_windowStart + 1, NetConstants.SequenceNumbers);
return(new NetSocketResult(true, false));
}
// Advance window to this position
_receivedAcks[seqNr] = true;
while (_windowStart != seqNr)
{
_receivedAcks[_windowStart] = false;
_windowStart = NetUtility.PowOf2Mod(_windowStart + 1, NetConstants.SequenceNumbers);
}
return(new NetSocketResult(true, false));
}
// on user thread
// the message must not be sent already
private NetSendResult SendFragmentedMessage(
NetOutgoingMessage message,
IEnumerable <NetConnection?> recipients,
NetDeliveryMethod method,
int sequenceChannel)
{
// determine minimum mtu for all recipients
int mtu = GetMTU(recipients, out int recipientCount);
if (recipientCount == 0)
{
Recycle(message);
return(NetSendResult.NoRecipients);
}
int group = GetNextFragmentGroup();
// do not send msg; but set fragmentgroup in case user tries to recycle it immediately
message._fragmentGroup = group << 2 | 1;
// create fragmentation specifics
int totalBytes = message.ByteLength;
int bytesPerChunk = NetFragmentationHelper.GetBestChunkSize(group, totalBytes, mtu);
int numChunks = totalBytes / bytesPerChunk;
if (numChunks * bytesPerChunk < totalBytes)
{
numChunks++;
}
var retval = NetSendResult.Sent;
int bitsPerChunk = bytesPerChunk * 8;
int bitsLeft = message.BitLength;
byte[] buffer = message.GetBuffer();
for (int i = 0; i < numChunks; i++)
{
NetOutgoingMessage chunk = CreateMessage();
chunk.SetBuffer(buffer, false);
chunk.BitLength = Math.Min(bitsLeft, bitsPerChunk);
chunk._fragmentGroup = group << 2 | 1;
chunk._fragmentGroupTotalBits = totalBytes * 8;
chunk._fragmentChunkByteSize = bytesPerChunk;
chunk._fragmentChunkNumber = i;
LidgrenException.Assert(chunk.BitLength != 0);
LidgrenException.Assert(chunk.GetEncodedSize() <= mtu);
Interlocked.Add(ref chunk._recyclingCount, recipientCount);
foreach (NetConnection?recipient in recipients.AsListEnumerator())
{
if (recipient == null)
{
continue;
}
NetSendResult result = recipient.EnqueueMessage(chunk, method, sequenceChannel).Result;
if (result > retval)
{
retval = result; // return "worst" result
}
}
bitsLeft -= bitsPerChunk;
}
return(retval);
}
// on user thread
private async ValueTask <NetSendResult> SendFragmentedMessageAsync(
PipeReader reader,
NetConnection recipient,
int sequenceChannel,
CancellationToken cancellationToken)
{
int group = GetNextFragmentGroup();
(NetSendResult Result, NetSenderChannel?) SendChunk(NetOutgoingMessage chunk)
{
return(recipient.EnqueueMessage(chunk, NetDeliveryMethod.ReliableOrdered, sequenceChannel));
}
NetSendResult finalResult;
Exception? exception = null;
try
{
ReadResult readResult;
do
{
readResult = await reader.ReadAsync(cancellationToken).ConfigureAwait(false);
if (readResult.IsCanceled)
{
NetOutgoingMessage cancelChunk = CreateStreamChunk(0, group, NetStreamFragmentType.Cancelled);
finalResult = SendChunk(cancelChunk).Result;
break;
}
ReadOnlySequence <byte> buffer = readResult.Buffer;
int mtu = recipient.CurrentMTU;
int bytesPerChunk = NetFragmentationHelper.GetBestChunkSize(group, (int)buffer.Length, mtu);
while (buffer.Length > 0)
{
long chunkLength = Math.Min(buffer.Length, bytesPerChunk);
NetOutgoingMessage chunk = CreateStreamChunk((int)chunkLength, group, NetStreamFragmentType.Data);
foreach (ReadOnlyMemory <byte> memory in buffer.Slice(0, chunkLength))
{
chunk.Write(memory.Span);
}
buffer = buffer.Slice(chunkLength);
LidgrenException.Assert(chunk.GetEncodedSize() <= mtu);
Interlocked.Add(ref chunk._recyclingCount, 1);
var(result, channel) = SendChunk(chunk);
if (result == NetSendResult.Queued)
{
await channel !.WaitForIdleAsync(millisecondsTimeout: 10000, cancellationToken);
}
else if (result != NetSendResult.Sent)
{
NetOutgoingMessage cancelChunk = CreateStreamChunk(0, group, NetStreamFragmentType.Cancelled);
finalResult = SendChunk(cancelChunk).Result;
reader.CancelPendingRead();
break;
}
}
reader.AdvanceTo(readResult.Buffer.End);
}while (!readResult.IsCompleted);
NetOutgoingMessage endChunk = CreateStreamChunk(0, group, NetStreamFragmentType.EndOfStream);
finalResult = SendChunk(endChunk).Result;
}
catch (Exception ex)
{
exception = ex;
NetOutgoingMessage errorChunk = CreateStreamChunk(0, group, NetStreamFragmentType.ServerError);
finalResult = SendChunk(errorChunk).Result;
}
await reader.CompleteAsync(exception).ConfigureAwait(false);
return(finalResult);
}