// called by SendMessage() and NetPeer.SendMessage; ie. may be user thread
internal NetSendResult EnqueueMessage(NetOutgoingMessage msg, NetDeliveryMethod method, int sequenceChannel)
{
if (m_status != NetConnectionStatus.Connected)
{
return(NetSendResult.FailedNotConnected);
}
NetMessageType tp = (NetMessageType)((int)method + sequenceChannel);
msg.m_messageType = tp;
// TODO: do we need to make this more thread safe?
int channelSlot = (int)method - 1 + sequenceChannel;
NetSenderChannelBase chan = m_sendChannels[channelSlot];
if (chan == null)
{
chan = CreateSenderChannel(tp);
}
if (msg.GetEncodedSize() > m_currentMTU)
{
throw new NetException("Message too large! Fragmentation failure?");
}
var retval = chan.Enqueue(msg);
if (retval == NetSendResult.Sent && m_peerConfiguration.m_autoFlushSendQueue == false)
{
retval = NetSendResult.Queued; // queued since we're not autoflushing
}
return(retval);
}
// Queue an item for immediate sending on the wire
// This method is called from the ISenderChannels
internal void QueueSendMessage(NetOutgoingMessage om, int seqNr)
{
m_peer.VerifyNetworkThread();
int sz = om.GetEncodedSize();
if (sz > m_currentMTU)
{
m_peer.LogWarning("Message larger than MTU! Fragmentation must have failed!");
}
if (m_sendBufferWritePtr + sz > m_currentMTU)
{
bool connReset; // TODO: handle connection reset
NetException.Assert(m_sendBufferWritePtr > 0 && m_sendBufferNumMessages > 0); // or else the message should have been fragmented earlier
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndpoint, m_sendBufferNumMessages, out connReset);
m_statistics.PacketSent(m_sendBufferWritePtr, m_sendBufferNumMessages);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
m_sendBufferWritePtr = om.Encode(m_peer.m_sendBuffer, m_sendBufferWritePtr, seqNr);
m_sendBufferNumMessages++;
NetException.Assert(m_sendBufferWritePtr > 0, "Encoded zero size message?");
NetException.Assert(m_sendBufferNumMessages > 0);
}
// on user thread
private void SendFragmentedMessage(NetOutgoingMessage msg, IList <NetConnection> recipients, NetDeliveryMethod method, int sequenceChannel)
{
// Note: this group id is PER SENDING/NetPeer; ie. same id is sent to all recipients;
// this should be ok however; as long as recipients differentiate between same id but different sender
int group = Interlocked.Increment(ref m_lastUsedFragmentGroup);
if (group >= NetConstants.MaxFragmentationGroups)
{
// @TODO: not thread safe; but in practice probably not an issue
m_lastUsedFragmentGroup = 1;
group = 1;
}
msg.m_fragmentGroup = group;
// do not send msg; but set fragmentgroup in case user tries to recycle it immediately
// create fragmentation specifics
int totalBytes = msg.LengthBytes;
// determine minimum mtu for all recipients
int mtu = GetMTU(recipients);
int bytesPerChunk = NetFragmentationHelper.GetBestChunkSize(group, totalBytes, mtu);
int numChunks = totalBytes / bytesPerChunk;
if (numChunks * bytesPerChunk < totalBytes)
{
numChunks++;
}
int bitsPerChunk = bytesPerChunk * 8;
int bitsLeft = msg.LengthBits;
for (int i = 0; i < numChunks; i++)
{
NetOutgoingMessage chunk = CreateMessage(mtu);
chunk.m_bitLength = (bitsLeft > bitsPerChunk ? bitsPerChunk : bitsLeft);
chunk.m_data = msg.m_data;
chunk.m_fragmentGroup = group;
chunk.m_fragmentGroupTotalBits = totalBytes * 8;
chunk.m_fragmentChunkByteSize = bytesPerChunk;
chunk.m_fragmentChunkNumber = i;
NetException.Assert(chunk.m_bitLength != 0);
NetException.Assert(chunk.GetEncodedSize() < mtu);
Interlocked.Add(ref chunk.m_recyclingCount, recipients.Count);
foreach (NetConnection recipient in recipients)
{
recipient.EnqueueMessage(chunk, method, sequenceChannel);
}
bitsLeft -= bitsPerChunk;
}
return;
}
/// <summary>
/// Send a message to a list of connections
/// </summary>
/// <param name="msg">The message to send</param>
/// <param name="recipients">The list of recipients to send to</param>
/// <param name="method">How to deliver the message</param>
/// <param name="sequenceChannel">Sequence channel within the delivery method</param>
/// <param name="except">Connection where message should not be sent, optional</param>
public void SendMessage(NetOutgoingMessage msg, List <NetConnection> recipients, NetDeliveryMethod method, int sequenceChannel, NetConnection except = null)
{
if (msg == null)
{
throw new ArgumentNullException("msg");
}
if (recipients == null)
{
throw new ArgumentNullException("recipients");
}
if (recipients.Count < 1)
{
throw new NetException("recipients must contain at least one item");
}
if (method == NetDeliveryMethod.Unreliable || method == NetDeliveryMethod.ReliableUnordered)
{
NetException.Assert(sequenceChannel == 0, "Delivery method " + method + " cannot use sequence channels other than 0!");
}
if (msg.m_isSent)
{
throw new NetException("This message has already been sent! Use NetPeer.SendMessage() to send to multiple recipients efficiently");
}
int mtu = GetMTU(recipients);
msg.m_isSent = true;
int len = msg.GetEncodedSize();
if (len <= mtu)
{
Interlocked.Add(ref msg.m_recyclingCount, except != null ? recipients.Count - 1 : recipients.Count);
foreach (NetConnection conn in recipients)
{
if (except != null && conn.RemoteUniqueIdentifier == except.RemoteUniqueIdentifier)
{
continue;
}
if (conn == null)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
continue;
}
NetSendResult res = conn.EnqueueMessage(msg, method, sequenceChannel);
if (res != NetSendResult.Queued && res != NetSendResult.Sent)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
}
}
}
else
{
// message must be fragmented!
SendFragmentedMessage(msg, recipients, method, sequenceChannel, except);
}
return;
}
/// <summary>
/// Send a message to a list of connections.
/// </summary>
/// <param name="message">The message to send</param>
/// <param name="recipients">The list of recipients to send to</param>
/// <param name="method">How to deliver the message</param>
/// <param name="sequenceChannel">Sequence channel within the delivery method</param>
public NetSendResult SendMessage(
NetOutgoingMessage message,
IEnumerable <NetConnection?> recipients,
NetDeliveryMethod method,
int sequenceChannel)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
if (recipients == null)
{
throw new ArgumentNullException(nameof(recipients));
}
NetConstants.AssertValidDeliveryChannel(
method, sequenceChannel, nameof(method), nameof(sequenceChannel));
message.AssertNotSent(nameof(message));
message._isSent = true;
int mtu = GetMTU(recipients, out int recipientCount);
if (recipientCount == 0)
{
Recycle(message);
return(NetSendResult.NoRecipients);
}
int length = message.GetEncodedSize();
if (length <= mtu)
{
Interlocked.Add(ref message._recyclingCount, recipientCount);
var retval = NetSendResult.Sent;
foreach (NetConnection?conn in recipients.AsListEnumerator())
{
if (conn == null)
{
continue;
}
NetSendResult result = conn.EnqueueMessage(message, method, sequenceChannel).Result;
if (result > retval)
{
retval = result; // return "worst" result
}
}
return(retval);
}
else
{
// message must be fragmented!
return(SendFragmentedMessage(message, recipients, method, sequenceChannel));
}
}
// on user thread
private void SendFragmentedMessage(NetOutgoingMessage msg, IList <NetConnection> recipients, NetDeliveryMethod method, int sequenceChannel)
{
int group = Interlocked.Increment(ref m_lastUsedFragmentGroup);
if (group >= NetConstants.MaxFragmentationGroups)
{
// TODO: not thread safe; but in practice probably not an issue
m_lastUsedFragmentGroup = 1;
group = 1;
}
msg.m_fragmentGroup = group;
// do not send msg; but set fragmentgroup in case user tries to recycle it immediately
// create fragmentation specifics
int totalBytes = msg.LengthBytes;
int mtu = m_configuration.MaximumTransmissionUnit;
int bytesPerChunk = NetFragmentationHelper.GetBestChunkSize(group, totalBytes, mtu);
int numChunks = totalBytes / bytesPerChunk;
if (numChunks * bytesPerChunk < totalBytes)
{
numChunks++;
}
int bitsPerChunk = bytesPerChunk * 8;
int bitsLeft = msg.LengthBits;
for (int i = 0; i < numChunks; i++)
{
NetOutgoingMessage chunk = CreateMessage(mtu);
chunk.m_bitLength = (bitsLeft > bitsPerChunk ? bitsPerChunk : bitsLeft);
chunk.m_data = msg.m_data;
chunk.m_fragmentGroup = group;
chunk.m_fragmentGroupTotalBits = totalBytes * 8;
chunk.m_fragmentChunkByteSize = bytesPerChunk;
chunk.m_fragmentChunkNumber = i;
NetException.Assert(chunk.m_bitLength != 0);
NetException.Assert(chunk.GetEncodedSize() < mtu);
Interlocked.Add(ref chunk.m_recyclingCount, recipients.Count);
foreach (NetConnection recipient in recipients)
{
recipient.EnqueueMessage(chunk, method, sequenceChannel);
}
bitsLeft -= bitsPerChunk;
}
return;
}
/// <summary>
/// Send a message to a specific connection.
/// </summary>
/// <param name="message">The message to send</param>
/// <param name="recipient">The recipient connection</param>
/// <param name="method">How to deliver the message</param>
/// <param name="sequenceChannel">Sequence channel within the delivery method</param>
public NetSendResult SendMessage(
NetOutgoingMessage message, NetConnection recipient, NetDeliveryMethod method, int sequenceChannel)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
if (recipient == null)
{
throw new ArgumentNullException(nameof(recipient));
}
NetConstants.AssertValidDeliveryChannel(
method, sequenceChannel, nameof(method), nameof(sequenceChannel));
message.AssertNotSent(nameof(message));
message._isSent = true;
bool suppressFragmentation =
(method == NetDeliveryMethod.Unreliable || method == NetDeliveryMethod.UnreliableSequenced) &&
Configuration.UnreliableSizeBehaviour != NetUnreliableSizeBehaviour.NormalFragmentation;
if (suppressFragmentation || message.GetEncodedSize() <= recipient.CurrentMTU)
{
Interlocked.Increment(ref message._recyclingCount);
return(recipient.EnqueueMessage(message, method, sequenceChannel).Result);
}
else
{
// message must be fragmented!
if (recipient.Status != NetConnectionStatus.Connected)
{
return(NetSendResult.FailedNotConnected);
}
List <NetConnection> recipients = NetConnectionListPool.Rent(1);
try
{
recipients.Add(recipient);
return(SendFragmentedMessage(message, recipients, method, sequenceChannel));
}
finally
{
NetConnectionListPool.Return(recipients);
}
}
}
// Queue an item for immediate sending on the wire
// This method is called from the ISenderChannels
internal void QueueSendMessage(NetOutgoingMessage om, int seqNr)
{
m_peer.VerifyNetworkThread();
int sz = om.GetEncodedSize();
//if (sz > m_currentMTU)
// m_peer.LogWarning("Message larger than MTU! Fragmentation must have failed!");
bool connReset; // TODO: handle connection reset
// can fit this message together with previously written to buffer?
if (m_sendBufferWritePtr + sz > m_currentMTU)
{
if (m_sendBufferWritePtr > 0 && m_sendBufferNumMessages > 0)
{
// previous message in buffer; send these first
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndPoint, m_sendBufferNumMessages, out connReset);
m_statistics.PacketSent(m_sendBufferWritePtr, m_sendBufferNumMessages);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
}
// encode it into buffer regardless if it (now) fits within MTU or not
m_sendBufferWritePtr = om.Encode(m_peer.m_sendBuffer, m_sendBufferWritePtr, seqNr);
m_sendBufferNumMessages++;
if (m_sendBufferWritePtr > m_currentMTU)
{
// send immediately; we're already over MTU
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndPoint, m_sendBufferNumMessages, out connReset);
m_statistics.PacketSent(m_sendBufferWritePtr, m_sendBufferNumMessages);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
if (m_sendBufferWritePtr > 0)
{
m_peer.m_needFlushSendQueue = true; // flush in heartbeat
}
Interlocked.Decrement(ref om.m_recyclingCount);
}
// called by SendMessage() and NetPeer.SendMessage; ie. may be user thread
internal NetSendResult EnqueueMessage(NetOutgoingMessage msg, NetDeliveryMethod method, int sequenceChannel)
{
NetMessageType tp = (NetMessageType)((int)method + sequenceChannel);
msg.m_messageType = tp;
// TODO: do we need to make this more thread safe?
int channelSlot = (int)method - 1 + sequenceChannel;
NetSenderChannelBase chan = m_sendChannels[channelSlot];
if (chan == null)
{
chan = CreateSenderChannel(tp);
}
if (msg.GetEncodedSize() > m_currentMTU)
{
throw new NetException("Message too large! Fragmentation failure?");
}
return(chan.Enqueue(msg));
}
// Queue an item for immediate sending on the wire
// This method is called from the ISenderChannels
internal void QueueSendMessage(NetOutgoingMessage om, int seqNr)
{
m_peer.VerifyNetworkThread();
int sz = om.GetEncodedSize();
if (sz > m_currentMTU)
m_peer.LogWarning("Message larger than MTU! Fragmentation must have failed!");
if (m_sendBufferWritePtr + sz > m_currentMTU)
{
bool connReset; // TODO: handle connection reset
NetException.Assert(m_sendBufferWritePtr > 0 && m_sendBufferNumMessages > 0); // or else the message should have been fragmented earlier
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndPoint, m_sendBufferNumMessages, out connReset);
m_statistics.PacketSent(m_sendBufferWritePtr, m_sendBufferNumMessages);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
m_sendBufferWritePtr = om.Encode(m_peer.m_sendBuffer, m_sendBufferWritePtr, seqNr);
m_sendBufferNumMessages++;
NetException.Assert(m_sendBufferWritePtr > 0, "Encoded zero size message?");
NetException.Assert(m_sendBufferNumMessages > 0);
}
// called by SendMessage() and NetPeer.SendMessage; ie. may be user thread
internal NetSendResult EnqueueMessage(NetOutgoingMessage msg, NetDeliveryMethod method, int sequenceChannel)
{
if (m_status != NetConnectionStatus.Connected)
return NetSendResult.FailedNotConnected;
NetMessageType tp = (NetMessageType)((int)method + sequenceChannel);
msg.m_messageType = tp;
// TODO: do we need to make this more thread safe?
int channelSlot = (int)method - 1 + sequenceChannel;
NetSenderChannelBase chan = m_sendChannels[channelSlot];
if (chan == null)
chan = CreateSenderChannel(tp);
if (msg.GetEncodedSize() > m_currentMTU)
throw new NetException("Message too large! Fragmentation failure?");
var retval = chan.Enqueue(msg);
if (retval == NetSendResult.Sent && m_peerConfiguration.m_autoFlushSendQueue == false)
retval = NetSendResult.Queued; // queued since we're not autoflushing
return retval;
}
/// <summary>
/// Send a message to a list of connections
/// </summary>
/// <param name="msg">The message to send</param>
/// <param name="recipients">The list of recipients to send to</param>
/// <param name="method">How to deliver the message</param>
/// <param name="sequenceChannel">Sequence channel within the delivery method</param>
public void SendMessage(NetOutgoingMessage msg, List<NetConnection> recipients, NetDeliveryMethod method, int sequenceChannel)
{
if (msg == null)
throw new ArgumentNullException("msg");
if (recipients == null)
throw new ArgumentNullException("recipients");
if (recipients.Count < 1)
throw new NetException("recipients must contain at least one item");
if (method == NetDeliveryMethod.Unreliable || method == NetDeliveryMethod.ReliableUnordered)
NetException.Assert(sequenceChannel == 0, "Delivery method " + method + " cannot use sequence channels other than 0!");
if (msg.m_isSent)
throw new NetException("This message has already been sent! Use NetPeer.SendMessage() to send to multiple recipients efficiently");
int mtu = GetMTU(recipients);
msg.m_isSent = true;
int len = msg.GetEncodedSize();
if (len <= mtu)
{
Interlocked.Add(ref msg.m_recyclingCount, recipients.Count);
foreach (NetConnection conn in recipients)
{
if (conn == null)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
continue;
}
NetSendResult res = conn.EnqueueMessage(msg, method, sequenceChannel);
if (res != NetSendResult.Queued && res != NetSendResult.Sent)
Interlocked.Decrement(ref msg.m_recyclingCount);
}
}
else
{
// message must be fragmented!
SendFragmentedMessage(msg, recipients, method, sequenceChannel);
}
return;
}
// 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);
}
// 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);
}
/// <summary>
/// Send a message to a list of connections
/// </summary>
/// <param name="msg">The message to send</param>
/// <param name="recipients">The list of recipients to send to</param>
/// <param name="method">How to deliver the message</param>
/// <param name="sequenceChannel">Sequence channel within the delivery method</param>
public void SendMessage(NetOutgoingMessage msg, IList <NetConnection> recipients, NetDeliveryMethod method, int sequenceChannel)
{
if (msg == null)
{
throw new ArgumentNullException("msg");
}
if (recipients == null)
{
if (msg.m_isSent == false)
{
Recycle(msg);
}
throw new ArgumentNullException("recipients");
}
if (recipients.Count < 1)
{
if (msg.m_isSent == false)
{
Recycle(msg);
}
throw new NetException("recipients must contain at least one item");
}
if (method == NetDeliveryMethod.Unreliable || method == NetDeliveryMethod.ReliableUnordered)
{
NetException.Assert(sequenceChannel == 0, "Delivery method " + method + " cannot use sequence channels other than 0!");
}
if (msg.m_isSent)
{
throw new NetException("This message has already been sent! Use NetPeer.SendMessage() to send to multiple recipients efficiently");
}
msg.m_isSent = true;
int mtu = GetMTU(recipients);
int len = msg.GetEncodedSize();
if (len <= mtu)
{
var recipientCount = recipients.Count;
Interlocked.Add(ref msg.m_recyclingCount, recipientCount);
for (var i = 0; i < recipientCount; i++)
{
var conn = recipients[i];
if (conn == null)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
continue;
}
NetSendResult res = conn.EnqueueMessage(msg, method, sequenceChannel);
if (res == NetSendResult.Dropped)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
}
}
}
else
{
// message must be fragmented!
SendFragmentedMessage(msg, recipients, method, sequenceChannel);
}
return;
}
// Queue an item for immediate sending on the wire
// This method is called from the ISenderChannels
internal void QueueSendMessage(NetOutgoingMessage om, int seqNr)
{
m_peer.VerifyNetworkThread();
int sz = om.GetEncodedSize();
//if (sz > m_currentMTU)
// m_peer.LogWarning("Message larger than MTU! Fragmentation must have failed!");
bool connReset; // TODO: handle connection reset
// can fit this message together with previously written to buffer?
if (m_sendBufferWritePtr + sz > m_currentMTU)
{
if (m_sendBufferWritePtr > 0 && m_sendBufferNumMessages > 0)
{
// previous message in buffer; send these first
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndPoint, m_sendBufferNumMessages, out connReset);
m_statistics.PacketSent(m_sendBufferWritePtr, m_sendBufferNumMessages);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
}
// encode it into buffer regardless if it (now) fits within MTU or not
m_sendBufferWritePtr = om.Encode(m_peer.m_sendBuffer, m_sendBufferWritePtr, seqNr);
m_sendBufferNumMessages++;
if (m_sendBufferWritePtr > m_currentMTU)
{
// send immediately; we're already over MTU
m_peer.SendPacket(m_sendBufferWritePtr, m_remoteEndPoint, m_sendBufferNumMessages, out connReset);
m_statistics.PacketSent(m_sendBufferWritePtr, m_sendBufferNumMessages);
m_sendBufferWritePtr = 0;
m_sendBufferNumMessages = 0;
}
}
// called by SendMessage() and NetPeer.SendMessage; ie. may be user thread
internal NetSendResult EnqueueMessage(NetOutgoingMessage msg, NetDeliveryMethod method, int sequenceChannel)
{
NetMessageType tp = (NetMessageType)((int)method + sequenceChannel);
msg.m_messageType = tp;
// TODO: do we need to make this more thread safe?
int channelSlot = (int)method - 1 + sequenceChannel;
NetSenderChannelBase chan = m_sendChannels[channelSlot];
if (chan == null)
chan = CreateSenderChannel(tp);
if (msg.GetEncodedSize() > m_currentMTU)
throw new NetException("Message too large! Fragmentation failure?");
return chan.Enqueue(msg);
}
/// <summary>
/// Send a message to a list of connections
/// </summary>
/// <param name="msg">The message to send</param>
/// <param name="recipients">The list of recipients to send to</param>
/// <param name="method">How to deliver the message</param>
/// <param name="sequenceChannel">Sequence channel within the delivery method</param>
public void SendTo(NetOutgoingMessage msg, IList <NetConnection> recipients, NetDeliveryMethod method = NetDeliveryMethod.ReliableOrdered, int sequenceChannel = 0)
{
if (msg == null)
{
throw new ArgumentNullException("msg");
}
if (recipients == null)
{
if (msg.m_isSent == false)
{
Recycle(msg);
}
throw new ArgumentNullException("recipients");
}
if (recipients.Count < 1)
{
if (msg.m_isSent == false)
{
Recycle(msg);
}
//throw new NetException("recipients must contain at least one item");
return;
}
if (method == NetDeliveryMethod.Unreliable || method == NetDeliveryMethod.ReliableUnordered)
{
NetException.Assert(sequenceChannel == 0, "Delivery method " + method + " cannot use sequence channels other than 0!");
}
if (msg.m_isSent)
{
throw new NetException("This message has already been sent! Use NetPeer.SendMessage() to send to multiple recipients efficiently");
}
msg.m_isSent = true;
int mtu = GetMTU(recipients);
int len = msg.GetEncodedSize();
if (len <= mtu)
{
Interlocked.Add(ref msg.m_recyclingCount, recipients.Count);
foreach (var conn in recipients)
{
if (conn == null)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
continue;
}
if (conn.m_isThrottled)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
conn.m_throttledMessages.Add(new NetConnection.ThrottledMessage(msg, method, sequenceChannel));
continue;
}
Network.Statistics.UploadedBytes += (uint)msg.LengthBytes;
Network.Statistics.uploadBytesPerSecLast += (uint)msg.LengthBytes;
NetSendResult res = conn.EnqueueMessage(msg, method, sequenceChannel);
if (res == NetSendResult.Dropped)
{
Interlocked.Decrement(ref msg.m_recyclingCount);
}
}
}
else
{
Network.Statistics.UploadedBytes += (uint)msg.LengthBytes;
Network.Statistics.uploadBytesPerSecLast += (uint)msg.LengthBytes;
// message must be fragmented!
SendFragmentedMessage(msg, recipients, method, sequenceChannel);
}
return;
}
