public override void Send(IPEndPoint endPoint, byte[] buffer, int offset, int length, bool putBufferToPool)
{
ValidateLength(length);
try
{
// Some implementations throw exception if sendto is called on a connected SOCK_DGRAM socket.
if (!_connectedMode)
{
SysSock.SendTo(buffer, offset, length, SocketFlags.None, endPoint);
}
else
{
SysSock.Send(buffer, offset, length, SocketFlags.None);
}
}
catch (SocketException se)
{
// Ignore harmless errors
if (!HarmlessErrors.Contains(se.SocketErrorCode))
{
_logger.Exception(se);
throw;
}
}
finally
{
if (putBufferToPool)
{
_buffersPool.Put(buffer);
}
}
}
private void SendLoop()
{
while (!_closing)
{
var packet = _sendQueue.Take();
try
{
if (!_connectedMode)
{
// This is not working for iOS/MacOS after connect call
SysSock.SendTo(packet.Buffer, packet.Offset, packet.Length, SocketFlags.None, packet.EndPoint);
}
else
{
SysSock.Send(packet.Buffer, packet.Offset, packet.Length, SocketFlags.None);
}
}
catch (SocketException se)
{
// Ignore harmless errors
if (!HarmlessErrors.Contains(se.SocketErrorCode))
{
_excQueue.Add(se);
break;
}
}
finally
{
if (packet.PutBufferToPool)
{
_buffersPool.Put(packet.Buffer);
}
}
}
}
private void ReceiveLoop()
{
while (!_closing)
{
var buffer = _buffersPool.Get(MTUSafe);
var bufferInUse = false;
EndPoint remoteEP = _receiveEndPoint;
try
{
var bytesReceived = SysSock.ReceiveFrom(buffer, MTUSafe, SocketFlags.None, ref remoteEP);
//ntrf: On windows we will get EMSGSIZE error if message was truncated, but Mono on Unix will fill up the
// whole buffer silently. We detect this case by allowing buffer to be slightly larger, than our typical
// packet, and dropping any packet, that did fill the whole thing.
if (bytesReceived > 0 && bytesReceived <= MTU)
{
var packet = new ReceivedPacket();
packet.Buffer = buffer;
packet.Offset = 0;
packet.Length = bytesReceived;
packet.EndPoint = (IPEndPoint)remoteEP;
bufferInUse = true;
_recvQueue.Add(packet);
if (_recvQueue.Count > RecvQueueLimit)
{
// Trash oldest
if (_recvQueue.TryTake(out packet))
{
_buffersPool.Put(packet.Buffer);
}
}
}
else
{
// If blocking call isn't actually blocking, sleep for a while
Thread.Sleep(10);
}
}
catch (SocketException se)
{
// Ignore harmless errors
if (!HarmlessErrors.Contains(se.SocketErrorCode))
{
_excQueue.Add(se);
break;
}
}
if (!bufferInUse)
{
_buffersPool.Put(buffer);
}
}
}
public override void Send(IPEndPoint endPoint, byte[] buffer, int offset, int length, bool putBufferToPool)
{
ValidateLength(length);
try
{
// Make sure socket is live
if (!Begin())
{
return;
}
SysSock.SendTo(buffer, offset, length, SocketFlags.None, endPoint);
}
catch (SocketException sx)
{
var err = sx.SocketErrorCode;
// Ignore harmless errors
if (!HarmlessErrors.Contains(err))
{
_logger.Exception(sx);
End();
// Our socket might be killed by iOS
// Make sure we'll create a new one on our next call
if (err != SocketError.NotConnected)
{
throw sx;
}
}
}
finally
{
if (putBufferToPool)
{
_buffersPool.Put(buffer);
}
}
}
public override void Send(byte[] buffer, int offset, int length, bool putBufferToPool)
{
try
{
// It uses Send instead of SendTo because SendTo seems not implemented in Unity on iOS
SysSock.Send(buffer, offset, length, SocketFlags.None);
}
catch (SocketException se)
{
// Ignore harmless errors
if (!HarmlessErrors.Contains(se.SocketErrorCode))
{
_logger.Exception(se);
throw;
}
}
finally
{
if (putBufferToPool)
{
_buffersPool.Put(buffer);
}
}
}
public override bool Receive(ref ReceivedPacket packet)
{
try
{
if (SysSock.Available == 0)
{
return(false);
}
}
catch (SocketException se)
{
// Ignore harmless errors
if (!HarmlessErrors.Contains(se.SocketErrorCode))
{
_logger.Exception(se);
throw;
}
}
var buffer = _buffersPool.Get(MTUSafe);
var bufferInUse = false;
EndPoint remoteEP = _remoteEndPoint;
try
{
int bytesReceived = 0;
if (_connectedMode)
{
bytesReceived = SysSock.Receive(buffer, MTUSafe, SocketFlags.None);
}
else
{
bytesReceived = SysSock.ReceiveFrom(buffer, MTUSafe, SocketFlags.None, ref remoteEP);
}
//ntrf: On windows we will get EMSGSIZE error if message was truncated, but Mono on Unix will fill up the
// whole buffer silently. We detect this case by allowing buffer to be slightly larger, than our typical
// packet, and dropping any packet, that did fill the whole thing.
if (bytesReceived > 0 && bytesReceived <= MTU)
{
packet.Buffer = buffer;
bufferInUse = true;
packet.Offset = 0;
packet.Length = bytesReceived;
packet.EndPoint = (IPEndPoint)remoteEP;
return(true);
}
}
catch (SocketException se)
{
// Ignore harmless errors
if (!HarmlessErrors.Contains(se.SocketErrorCode))
{
_logger.Exception(se);
throw;
}
}
finally
{
// We don't return buffer here if it is to be processed by client
if (!bufferInUse)
{
_buffersPool.Put(buffer);
}
}
return(false);
}
public override bool Receive(ref ReceivedPacket packet)
{
byte[] buffer = null;
var bufferInUse = false;
try
{
if (!Begin())
{
return(false);
}
if (!SysSock.Poll(0, SelectMode.SelectRead))
{
return(false);
}
buffer = _buffersPool.Get(MTUSafe);
EndPoint remoteEP = _receiveEndPoint;
var bytesReceived = SysSock.ReceiveFrom(buffer, MTUSafe, SocketFlags.None, ref remoteEP);
//ntrf: On windows we will get EMSGSIZE error if message was truncated, but Mono on Unix will fill up the
// whole buffer silently. We detect this case by allowing buffer to be slightly larger, than our typical
// packet, and dropping any packet, that did fill the whole thing.
if (bytesReceived > 0 && bytesReceived <= MTU)
{
packet.Buffer = buffer;
bufferInUse = true;
packet.Offset = 0;
packet.Length = bytesReceived;
packet.EndPoint = (IPEndPoint)remoteEP;
return(true);
}
}
catch (SocketException sx)
{
var err = sx.SocketErrorCode;
// Ignore harmless errors
// On Windows machines we might have a case of ICMP Port Unreachable being delivered,
// which causes ECONNRESET on next receive call
if (!HarmlessErrors.Contains(err))
{
End();
// Our socket might be killed by iOS. Recreate the socket.
if (err != SocketError.NotConnected)
{
_logger.Exception(sx);
throw;
}
}
}
finally
{
// We don't return buffer here if it is to be processed by client
if (buffer != null && !bufferInUse)
{
_buffersPool.Put(buffer);
}
}
return(false);
}
