/// <summary>
/// Called when a new UDP packet is received on the listening port.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void UdpMessageReceived(object sender, SocketAsyncEventArgs e)
{
//Copy over buffer and remote endpoint
bool completingAsync;
do
{
using (MessageBuffer buffer = MessageBuffer.Create(e.BytesTransferred))
{
Buffer.BlockCopy(e.Buffer, 0, buffer.Buffer, buffer.Offset, e.BytesTransferred);
buffer.Count = e.BytesTransferred;
EndPoint remoteEndPoint = e.RemoteEndPoint;
//Start listening again
try
{
completingAsync = UdpListener.ReceiveFromAsync(e);
}
catch (ObjectDisposedException)
{
return;
}
//Handle message or new connection
BichannelServerConnection connection;
bool exists;
lock (UdpConnections) // TODO remove lock please
exists = UdpConnections.TryGetValue(remoteEndPoint, out connection);
if (exists)
{
connection.HandleUdpMessage(buffer);
}
else
{
HandleUdpConnection(buffer, remoteEndPoint);
}
}
}while (!completingAsync);
}
/// <summary>
/// Called when a UDP message is received on the fallback system.
/// </summary>
/// <param name="result">The result of the operation.</param>
private void UdpMessageReceived(IAsyncResult result)
{
EndPoint remoteEndPoint = new IPEndPoint(Address.AddressFamily == AddressFamily.InterNetworkV6 ? IPAddress.IPv6Any : IPAddress.Any, 0);
int bytesReceived;
try
{
bytesReceived = UdpListener.EndReceiveFrom(result, ref remoteEndPoint);
}
catch (SocketException)
{
UdpListener.BeginReceiveFrom((byte[])result.AsyncState, 0, ushort.MaxValue, SocketFlags.None, ref remoteEndPoint, UdpMessageReceived, (byte[])result.AsyncState);
return;
}
//Copy over buffer and remote endpoint
using (MessageBuffer buffer = MessageBuffer.Create(bytesReceived))
{
Buffer.BlockCopy((byte[])result.AsyncState, 0, buffer.Buffer, buffer.Offset, bytesReceived);
buffer.Count = bytesReceived;
//Start listening again
UdpListener.BeginReceiveFrom((byte[])result.AsyncState, 0, ushort.MaxValue, SocketFlags.None, ref remoteEndPoint, UdpMessageReceived, (byte[])result.AsyncState);
//Handle message or new connection
BichannelServerConnection connection;
bool exists;
lock (UdpConnections)
exists = UdpConnections.TryGetValue(remoteEndPoint, out connection);
if (exists)
{
connection.HandleUdpMessage(buffer);
}
else
{
HandleUdpConnection(buffer, remoteEndPoint);
}
}
}
