/// <summary>
/// Send the specified datagram.
/// </summary>
public void Send(Buffer buffer, IPEndPoint ip)
{
if (ip.Address.Equals(IPAddress.Broadcast))
{
Broadcast(buffer, ip.Port);
return;
}
buffer.MarkAsUsed();
if (mSocket != null)
{
buffer.BeginReading();
lock (mOut)
{
Datagram dg = new Datagram();
dg.buffer = buffer;
dg.ip = ip;
mOut.Enqueue(dg);
if (mOut.Count == 1)
{
// If it's the first datagram, begin the sending process
mSocket.BeginSendTo(buffer.buffer, buffer.position, buffer.size,
SocketFlags.None, ip, OnSend, null);
}
}
}
else
{
buffer.Recycle();
throw new InvalidOperationException("The socket is null. Did you forget to call UdpProtocol.Start()?");
}
}
/// <summary>
/// Receive incoming data.
/// </summary>
void OnReceive(IAsyncResult result)
{
if (!isActive) return;
int bytes = 0;
try
{
bytes = mSocket.EndReceiveFrom(result, ref mEndPoint);
}
catch (System.Exception ex)
{
Error(new IPEndPoint(Tools.localAddress, 0), ex.Message);
}
if (bytes > 4)
{
// This datagram is now ready to be processed
Buffer buffer = Buffer.Create();
buffer.BeginWriting(false).Write(mTemp, 0, bytes);
buffer.BeginReading(4);
// The 'endPoint', gets reassigned rather than updated.
Datagram dg = new Datagram();
dg.buffer = buffer;
dg.ip = (IPEndPoint)mEndPoint;
lock (mIn) mIn.Enqueue(dg);
}
// Queue up the next receive operation
if (mSocket != null)
{
mEndPoint = mDefaultEndPoint;
mSocket.BeginReceiveFrom(mTemp, 0, mTemp.Length, SocketFlags.None, ref mEndPoint, OnReceive, null);
}
}
/// <summary>
/// Add an error packet to the incoming queue.
/// </summary>
public void Error(IPEndPoint ip, string error)
{
Buffer buffer = Buffer.Create();
buffer.BeginPacket(Packet.Error).Write(error);
buffer.EndTcpPacketWithOffset(4);
Datagram dg = new Datagram();
dg.buffer = buffer;
dg.ip = ip;
lock (mIn) mIn.Enqueue(dg);
}