private void ReceiveCallback(object sender, SocketAsyncEventArgs e)
{
if (e.BytesTransferred == 0)
{
}
else
{
int count = e.BytesTransferred;
byte[] data = new byte[count];
Buffer.BlockCopy(e.Buffer, 0, data, 0, count);
MemoryStream stream = new MemoryStream(data);
while (stream.Position < stream.Length)
{
DTLSRecord record = DTLSRecord.Deserialise(stream);
if (record != null)
{
record.RemoteEndPoint = e.RemoteEndPoint;
SocketAddress address = record.RemoteEndPoint.Serialize();
Session session = _Sessions.GetSession(address);
if (session == null)
{
ThreadPool.QueueUserWorkItem(ProcessRecord, record);
}
else
{
CheckSession(session, record);
}
}
}
Socket socket = sender as Socket;
if (socket != null)
{
System.Net.EndPoint remoteEndPoint;
if (socket.AddressFamily == AddressFamily.InterNetwork)
{
remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
}
else
{
remoteEndPoint = new IPEndPoint(IPAddress.IPv6Any, 0);
}
e.RemoteEndPoint = remoteEndPoint;
e.SetBuffer(0, 4096);
socket.ReceiveFromAsync(e);
}
}
}
private void _ReceiveCallback(byte[] recvData, EndPoint ip)
{
if (recvData == null)
{
throw new ArgumentNullException(nameof(recvData));
}
if (ip == null)
{
throw new ArgumentNullException(nameof(ip));
}
if (!recvData.Any())
{
//nothing received? return?
return;
}
if (recvData.Length < 13)
{
this._RecvDataBuffer = this._RecvDataBuffer.Concat(recvData).ToArray();
return;
}
var length = BitConverter.ToUInt16(recvData.Skip(11).Take(2).Reverse().ToArray(), 0);
if (recvData.Length < length)
{
this._RecvDataBuffer = this._RecvDataBuffer.Concat(recvData).ToArray();
return;
}
var fullData = this._RecvDataBuffer.Concat(recvData).ToArray();
this._RecvDataBuffer = new byte[0];
using (var stream = new MemoryStream(fullData))
{
while (stream.Position < stream.Length)
{
var record = DTLSRecord.Deserialise(stream);
record.RemoteEndPoint = ip;
this._Records.Add(record);
}
}
}
private void ReceiveCallback(object sender, SocketAsyncEventArgs e)
{
if (e.BytesTransferred == 0)
{
}
else
{
int count = e.BytesTransferred;
byte[] data = new byte[count];
Buffer.BlockCopy(e.Buffer, 0, data, 0, count);
MemoryStream stream = new MemoryStream(data);
while (stream.Position < stream.Length)
{
DTLSRecord record = DTLSRecord.Deserialise(stream);
if (record != null)
{
record.RemoteEndPoint = e.RemoteEndPoint;
_Records.Add(record);
_TriggerProcessRecords.Set();
}
}
Socket socket = sender as Socket;
if (socket != null)
{
System.Net.EndPoint remoteEndPoint;
if (socket.AddressFamily == AddressFamily.InterNetwork)
{
remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
}
else
{
remoteEndPoint = new IPEndPoint(IPAddress.IPv6Any, 0);
}
e.RemoteEndPoint = remoteEndPoint;
e.SetBuffer(0, 4096);
socket.ReceiveFromAsync(e);
}
}
}
private void ReceiveCallback(object sender, SocketAsyncEventArgs e)
{
if (e.BytesTransferred == 0)
{
#if DEBUG
Console.WriteLine($"ReceiveCallback got 0 bytes");
#endif
}
else
{
int count = e.BytesTransferred;
#if DEBUG
Console.WriteLine($"ReceiveCallback got {count} bytes");
#endif
byte[] data = new byte[count];
Buffer.BlockCopy(e.Buffer, 0, data, 0, count);
MemoryStream stream = new MemoryStream(data);
while (stream.Position < stream.Length)
{
DTLSRecord record = DTLSRecord.Deserialise(stream);
if (record != null)
{
record.RemoteEndPoint = e.RemoteEndPoint;
SocketAddress address = record.RemoteEndPoint.Serialize();
Session session = _Sessions.GetSession(address);
if (session == null)
{
#if DEBUG
Console.WriteLine($"session was null");
#endif
ThreadPool.QueueUserWorkItem(ProcessRecord, record);
}
else
{
CheckSession(session, record);
}
}
}
if (sender is Socket socket)
{
System.Net.EndPoint remoteEndPoint;
if (socket.AddressFamily == AddressFamily.InterNetwork)
{
remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
}
else
{
remoteEndPoint = new IPEndPoint(IPAddress.IPv6Any, 0);
}
e.RemoteEndPoint = remoteEndPoint;
e.SetBuffer(0, 4096);
bool pending = socket.ReceiveFromAsync(e);
if (!pending)
{
// If ReceiveFromAsync returns false, the callback will not be triggered automatically so we must call it ourselves.
ReceiveCallback(sender, e);
}
}
}
}
