public SendAsyncResult(UdpOutputChannel channel, Message message, AsyncCallback callback, object state)
: base(callback, state)
{
this.channel = channel;
this.messageBuffer = channel.EncodeMessage(message);
try
{
IAsyncResult result = null;
try
{
result = channel.socket.BeginSendTo(messageBuffer.Array, messageBuffer.Offset, messageBuffer.Count,
SocketFlags.None, channel.remoteEndPoint, new AsyncCallback(OnSend), this);
}
catch (SocketException socketException)
{
throw UdpChannelHelpers.ConvertTransferException(socketException);
}
if (!result.CompletedSynchronously)
{
return;
}
CompleteSend(result, true);
}
catch
{
CleanupBuffer();
throw;
}
}
public void Send(Message message)
{
base.ThrowIfDisposedOrNotOpen();
ArraySegment <byte> messageBuffer = EncodeMessage(message);
try
{
int bytesSent = this.socket.SendTo(messageBuffer.Array, messageBuffer.Offset, messageBuffer.Count,
SocketFlags.None, this.remoteEndPoint);
if (bytesSent != messageBuffer.Count)
{
throw new CommunicationException(string.Format(CultureInfo.CurrentCulture,
"A Udp error occurred sending a message to {0}.", this.remoteEndPoint));
}
}
catch (SocketException socketException)
{
throw UdpChannelHelpers.ConvertTransferException(socketException);
}
finally
{
// we need to make sure buffers are always returned to the BufferManager
parent.BufferManager.ReturnBuffer(messageBuffer.Array);
}
}
protected override IAsyncResult OnBeginAcceptChannel(TimeSpan timeout, AsyncCallback callback, object state)
{
UdpChannelHelpers.ValidateTimeout(timeout);
if (!this.IsDisposed)
{
this.EnsureChannelAvailable();
}
return(this.channelQueue.BeginDequeue(timeout, callback, state));
}
//Synchronously returns a channel that is attached to this listener.
protected override IInputChannel OnAcceptChannel(TimeSpan timeout)
{
UdpChannelHelpers.ValidateTimeout(timeout);
if (!this.IsDisposed)
{
this.EnsureChannelAvailable();
}
IInputChannel channel;
if (this.channelQueue.Dequeue(timeout, out channel))
{
return(channel);
}
else
{
throw CreateAcceptTimeoutException(timeout);
}
}
void CompleteSend(IAsyncResult result, bool synchronous)
{
try
{
int bytesSent = channel.socket.EndSendTo(result);
if (bytesSent != messageBuffer.Count)
{
throw new CommunicationException(string.Format(CultureInfo.CurrentCulture,
"A Udp error occurred sending a message to {0}.", channel.remoteEndPoint));
}
}
catch (SocketException socketException)
{
throw UdpChannelHelpers.ConvertTransferException(socketException);
}
finally
{
CleanupBuffer();
}
base.Complete(synchronous);
}
protected override IAsyncResult OnBeginWaitForChannel(TimeSpan timeout, AsyncCallback callback, object state)
{
UdpChannelHelpers.ValidateTimeout(timeout);
return(this.channelQueue.BeginWaitForItem(timeout, callback, state));
}
protected override bool OnWaitForChannel(TimeSpan timeout)
{
UdpChannelHelpers.ValidateTimeout(timeout);
return(this.channelQueue.WaitForItem(timeout));
}
internal UdpOutputChannel(UdpChannelFactory factory, EndpointAddress remoteAddress, Uri via, MessageEncoder encoder)
: base(factory)
{
// validate addressing arguments
if (!string.Equals(via.Scheme, UdpConstants.Scheme, StringComparison.InvariantCultureIgnoreCase))
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
"The scheme {0} specified in address is not supported.", via.Scheme), "via");
}
if (via.IsDefaultPort)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
"The address {0} must specify a remote port.", via), "via");
}
// convert the Uri host into an IP Address
IPAddress remoteIP = null;
switch (via.HostNameType)
{
default:
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
"Cannot determine the remote host address from {0}.",
this.via.ToString()), "via");
case UriHostNameType.IPv4:
case UriHostNameType.IPv6:
remoteIP = IPAddress.Parse(via.Host);
break;
case UriHostNameType.Basic:
case UriHostNameType.Dns:
{
IPHostEntry hostEntry = Dns.GetHostEntry(via.Host);
if (hostEntry.AddressList.Length > 0)
{
remoteIP = hostEntry.AddressList[0];
}
else
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
"Failed to resolve remote host: {0}.", via.Host),
"via");
}
break;
}
}
if (factory.Multicast && !UdpChannelHelpers.IsInMulticastRange(remoteIP))
{
throw new ArgumentOutOfRangeException("remoteEndPoint", "Via must be in the valid multicast range.");
}
this.parent = factory;
this.remoteAddress = remoteAddress;
this.via = via;
this.encoder = encoder;
this.remoteEndPoint = new IPEndPoint(remoteIP, via.Port);
this.socket = new Socket(this.remoteEndPoint.AddressFamily, SocketType.Dgram, ProtocolType.Udp);
if (parent.Multicast)
{
this.socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);
#if LATER // Support outgoing interface
if (this.remoteEndPoint.AddressFamily == AddressFamily.InterNetwork)
{
this.socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastInterface, IPAddress.HostToNetworkOrder((int)interfaceIndex));
}
else // we are IPv6
{
this.sendSocketV6.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.MulticastInterface, (int)interfaceIndex);
}
#endif
}
}
public IAsyncResult BeginWaitForMessage(TimeSpan timeout, AsyncCallback callback, object state)
{
UdpChannelHelpers.ValidateTimeout(timeout);
return(this.messageQueue.BeginWaitForItem(timeout, callback, state));
}
public bool WaitForMessage(TimeSpan timeout)
{
UdpChannelHelpers.ValidateTimeout(timeout);
return(this.messageQueue.WaitForItem(timeout));
}
public IAsyncResult BeginTryReceive(TimeSpan timeout, AsyncCallback callback, object state)
{
UdpChannelHelpers.ValidateTimeout(timeout);
return(this.messageQueue.BeginDequeue(timeout, callback, state));
}
public bool TryReceive(TimeSpan timeout, out Message message)
{
UdpChannelHelpers.ValidateTimeout(timeout);
return(this.messageQueue.Dequeue(timeout, out message));
}