Dotnetty's SocketDatagramChannel no have Socket.ReceiveFrom() in DoReadMessages()

dotnetty use for unity 2019.2f in mobile,
udp packet sending is work, but receieving is not work in my case...

and i try see it SocketDatagramChannel.cs ,

and i found SocketDatagramChannel no have Socket.ReceiveFrom() funtions...

maybe right this? please check this code and dotnetty's SocketDatagramChannel.cs

my english not good sorry.

SocketDatagramChannel.cs line 139

https://github.com/Azure/DotNetty/blob/dev/src/DotNetty.Transport/Channels/Sockets/SocketDatagramChannel.cs#L139
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protected override int DoReadMessages(List buf)
{
Contract.Requires(buf != null);

SocketChannelAsyncOperation operation = this.ReadOperation;
IByteBuffer data = (IByteBuffer)operation.UserToken;
bool free = true;

try
{
IRecvByteBufAllocatorHandle handle = this.Unsafe.RecvBufAllocHandle;

↓ changed
===============================================================
EndPoint remoteEndPoint = null;

if (this.Socket.Connected)
{
remoteEndPoint = this.Socket.RemoteEndPoint;
}
else
{
remoteEndPoint = operation.RemoteEndPoint;
}

int received = this.Socket.ReceiveFrom(data.Array, data.ArrayOffset + data.WriterIndex, data.WritableBytes, SocketFlags.None, ref remoteEndPoint);
============================================================

//int received = operation.BytesTransferred; <-- source
if (received <= 0)
{
return 0;
}

handle.LastBytesRead = received;
data.SetWriterIndex(data.WriterIndex + received);
EndPoint remoteAddress = operation.RemoteEndPoint;
buf.Add(new DatagramPacket(data, remoteAddress, this.LocalAddress));
free = false;

return 1;
}
finally
{
if (free)
{
data.Release();
}

operation.UserToken = null;
}
}

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